WO2006008845A1 - 集光フィルム、液晶パネルおよびバックライト並びに集光フィルムの製造方法 - Google Patents
集光フィルム、液晶パネルおよびバックライト並びに集光フィルムの製造方法 Download PDFInfo
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- WO2006008845A1 WO2006008845A1 PCT/JP2004/018250 JP2004018250W WO2006008845A1 WO 2006008845 A1 WO2006008845 A1 WO 2006008845A1 JP 2004018250 W JP2004018250 W JP 2004018250W WO 2006008845 A1 WO2006008845 A1 WO 2006008845A1
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Classifications
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- G—PHYSICS
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- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- Condensing film liquid crystal panel and backlight, and method for producing condensing film
- the present invention relates to a light collecting film, a liquid crystal panel, a backlight, and a method for manufacturing a light collecting film.
- imaging devices are required to have a large screen for indoor stationary types, and portable types are used in various places. It is essential to be able to do it. Furthermore, both stationary and portable types are required to be lightweight. As a result, the traditional CRT (Cathode Ray Tube) display is being replaced by a flat display.
- CRT Cathode Ray Tube
- Information appliances are also being used in indoor applications as portable power. Unlike the stationary type, portable information devices are used in various places.
- the stationary type requires a large screen and 'high brightness' requires a wide viewing angle, and the portable type is used in a wide variety of places. There is a need for improved impact resistance.
- Plasma displays As the flat display, a plasma display (Plasma Display Panel), a liquid crystal display (Liquid Crystal Display), and an organic EL display (Organic Light Emitted Display) are known. Plasma displays need to generate high voltage due to their operating principles and are not suitable for portable use. Liquid crystal displays and organic EL displays that can be driven with low power consumption are suitable for portable use.
- plasma displays were the first display to be enlarged.
- liquid crystal displays can be made lighter, and can be enlarged in the same way as plasma displays.
- the size has been increased in the same way as plasma displays.
- a plasma display must generate a high voltage in terms of operating principle. It is not suitable for mobile use, and it can be driven with low power consumption and an OLED display can be used for mobile use! /
- liquid crystal displays are the mainstream.
- OLED displays are expected to grow in the future due to sharp images.
- the organic EL display and the liquid crystal display are divided into an “active drive type” in which each pixel is provided with an active element to drive the pixel, and a “simple matrix” in which the pixel is driven by two sets of orthogonal strip electrode groups.
- active drive type can drastically shorten the response time compared to the simple matrix type, and can display a moving image of many pixels.
- control related to image quality such as contrast and gradation, can be finely tuned, making it possible to display a moving image similar to a CRT.
- the “active drive type” has become the mainstream of the current drive system.
- liquid crystal display obtains color by using transmitted light or reflected light.
- transmissive, reflective, and transflective depending on whether the pixel electrode transmits light, reflects light, or partially transmits light and partially reflects light. being classified.
- a transmissive liquid crystal display or an organic EL display has a clear image.
- a transmissive liquid crystal display or an organic EL display has a clear image.
- the contrast of the image is lowered and the image is difficult to see outdoors when it is brighter than the self-luminous emission intensity.
- Increasing the intensity of the light source so that the contrast does not decrease even outdoors can cause problems such as glare in indoor image quality and increased power consumption.
- a reflective liquid crystal display is excellent in visibility outside because it reflects external light and displays an image, but has a drawback that it is difficult to see an image in a dark place. This can be improved by providing a front light.
- the front light has a drawback in that it is difficult to uniformly irradiate the entire screen even in the case of a small screen such as a portable type.
- Transflective liquid crystal display as a liquid crystal display having advantages of a transmissive type and a reflective type.
- Transflective LCDs use both backlight light and external light for display by making the pixel electrodes semi-transparent or providing openings, ensuring visibility both outdoors and indoors. it can. For this reason, most current portable information terminals are semi-transmissive liquids. A crystal panel is used.
- the image of the transflective liquid crystal display is inferior to the transmissive liquid crystal display or the organic EL display in a dark place, and inferior to the reflective liquid crystal display in a bright place. For this reason, it is necessary to further improve image quality as a portable information terminal.
- the display is an information terminal such as a mobile phone or a PDA (Personal Digital
- the characteristics required of a display panel for portable use include screen size, panel thinness, power consumption, and the like.
- organic EL displays can be made as thin as a single substrate in principle.
- a liquid crystal display panel can be thinned to the thickness of two substrates for a reflective liquid crystal display, but a transmissive Z transflective liquid crystal display must be thick because it requires a backlight. Absent.
- a reflective liquid crystal display is advantageous, but if an auxiliary light source is installed, it is equivalent to a transmissive liquid crystal display or an organic EL display.
- liquid crystal displays have a long history of commercialization compared to organic EL displays, and are considered advantageous in price.
- organic EL displays have the potential to surpass liquid crystal displays in terms of thinness, light weight, and excellent visibility in the dark, and improvements in luminous efficiency and lifetime have been studied.
- plasma displays, transmissive liquid crystal displays, and organic EL display power are suitable for stationary applications, and transflective liquid crystal displays are suitable for portable applications.
- a liquid crystal display is a display with advantages not found in plasma displays and organic EL displays.
- FIG. 27 shows a cross-sectional view of a conventional transflective liquid crystal display panel.
- the liquid crystal panel is composed of liquid crystal sandwiched between two substrates.
- pixels each provided with a thin film transistor 311 and a pixel electrode 310 are regularly arranged, and wiring is also formed to send an electric signal for driving the thin film transistor 311.
- the pixel electrode 310 is designed with a transmittance of 30-70%. Normally, it is often designed with a transmittance of 70%.
- a color filter 305 is disposed on one side of the other glass substrate 304.
- the color filter (CF) 305 is disposed at the pixel electrode and the black matrix (BM) is disposed at a position facing the boundary between the pixel electrodes, and the transparent electrode 307 covers them.
- Alignment films 307 and 309 for aligning liquid crystals in a desired direction are formed on the surfaces of these two substrates, respectively.
- these two substrates are fixed by a sealing material B arranged at the periphery of the substrate, and the liquid crystal is sealed in the gap between these two substrates.
- Film substrates having various optical functions are bonded to the outside of the two substrates sandwiching the liquid crystal.
- two film substrates of polarizing plates (linear polarizing plates) 302 and 314 and retardation films (1Z4 wavelength plates) 303 and 313 are laminated to provide a function of making incident light circularly polarized.
- an antireflection plate 301 for preventing reflection of external light is also provided.
- the knocklight outputs white light, such as a light source C such as a lamp or a light emitting diode (LED)), a light guide 317, a reflector 318, a diffusion sheet 316, and a viewing angle adjustment sheet 315.
- a light source C such as a lamp or a light emitting diode (LED)
- a light guide 317 such as a lamp or a light emitting diode (LED)
- a reflector 318 such as a light guide 317, a reflector 318, a diffusion sheet 316, and a viewing angle adjustment sheet 315.
- the design of these components is optimal so that the knocklight operates as a uniform surface emitter as much as possible and the light emitted from the light source C is guided as efficiently as possible toward the liquid crystal panel. It has become.
- a transparent plastic substrate such as polymethylmethacrylate (PMMA) is used as the light guide, and the thickness is about 1. Omm.
- Reflector 318, diffuser sheet 316, and viewing angle adjustment sheet 315 have been processed to fulfill their optical functions, and the thickness is 2. Omm when all the components of the backlight shown in Fig. 27 are covered. It becomes about.
- White light emitted from the light source C is incident on the light guide 317, the path is changed by the reflector 318, and is diffused by the diffusion sheet 316.
- the diffused light is adjusted to have the desired directivity by the viewing angle adjusting sheet 315 and then reaches the liquid crystal panel.
- This light is in a non-polarized state. Only one linearly polarized light passes through the linear polarizing plate 314 of the liquid crystal panel. This linearly polarized light becomes circularly polarized light by the phase difference plate (1Z4 wavelength plate) 313, and sequentially passes through the glass substrate 312, the pixel electrode 310 formed of a translucent material, and the like. The liquid crystal layer 308 is reached.
- the alignment state of liquid crystal molecules is controlled by the presence or absence of a potential difference between the transparent electrode (counter electrode) 306 facing the pixel electrode 310. That is, in an extreme alignment state, the circularly polarized light that has entered the downward force in FIG. 27 passes through the liquid crystal layer 308 and the transparent electrode 306 as it is, and light in a specific wavelength range passes through the color filter 305. And reaches the retardation plate (1Z 4 wavelength plate) 313, and passes through the polarizing plate (linear polarizing plate) 314 almost completely. Therefore, this pixel displays the color determined by the color filter brightest.
- the circularly polarized light that has passed through the polarizing plate (linear polarizing plate) 302 and the retardation plate (1Z4 wavelength plate) 303 passes through the liquid crystal layer. It passes through and 30% of the light is reflected by the pixel electrode and used for display. Therefore, it operates as a reflective liquid crystal display.
- the pixel electrode is formed of a translucent material, and the operation as a transmissive liquid crystal display is almost as described above.
- the light transmittance of the pixel electrode is designed to be 70%, for example, 30% of the light is not used for display.
- the liquid crystal panel from the upper side of FIG. 27, circularly polarized light that has passed through the linear polarizing plate and the 1Z4 wavelength plate passes through the liquid crystal layer, and 30% is reflected by the pixel electrode. Used for display. Therefore, it operates as a reflective liquid crystal display.
- a glass substrate is used as a substrate on which a thin film transistor is formed so as to withstand high temperatures when the thin film transistor is manufactured.
- technologies for forming thin film transistors at lower temperatures are also being studied, but with the recent miniaturization, functional elements also drive liquid crystals.
- the same substrate as the thin film transistor there is a problem in device characteristics, and it has not been put into practical use.
- a high-temperature polysilicon transistor formed on a quartz substrate a low-temperature polysilicon transistor formed on a glass substrate
- an amorphous silicon transistor formed on a glass substrate or a plastic substrate In order to reduce the size of liquid crystal panels, driver ICs, which were previously externally attached, are being formed on glass substrates. Amorphous silicon transistors can be manufactured at the lowest temperature, but the characteristics required to operate driver ICs can be put to practical use on plastic substrates. For this reason, it is practical to form a low-temperature polysilicon transistor on a glass substrate with the current manufacturing technology.
- a transmissive liquid crystal display using a plastic substrate is, for example, a paper by A sano et al. (A. Asano and T. Kinoslma, 'Low-temperature polycrystalline- Silicon TFT color LCD panel made of plastic substrates, "in Society for Information Display International Symposium Digest of Technical Papers (Society for Information Display ⁇ Boston, 2002,) Vol. 33, pp. 1196—1199.) .
- a polysilicon TFT is formed on a glass substrate provided with an etching stopper layer by a known low-temperature polycrystalline silicon thin film transistor manufacturing method, and a removable adhesive is formed on the polysilicon TFT. Then paste the temporary substrate (Fig. 28 (a)). Next, the glass substrate is removed by etching with hydrofluoric acid (HF) (FIG. 28 (b)). Then, after removing the etching stop layer, a polysilicon TFT is bonded to a plastic substrate with a thickness of 0.2 mm via an adhesive (Fig. 28 (c)). Thereafter, the temporary substrate is removed, and then the removable adhesive is removed (FIG. 28 (d)). Thereafter, an active drive liquid crystal display panel is formed by injecting liquid crystal molecules into the gap between the substrate and a color filter, such as a transparent electrode and facing the substrate.
- a color filter such as a transparent electrode and facing the substrate.
- a conventional transmissive Z transflective liquid crystal display becomes thicker and heavier due to the use of a backlight.
- a configuration using organic EL has been proposed.
- Japanese Patent Laid-Open No. 2000-29034 shown in FIG. 29 (a) shows an alignment film 623 that has been previously subjected to an alignment treatment in order to prevent deterioration of the organic EL due to the formation of the alignment film by conventional baking.
- an alignment film 623 that has been previously subjected to an alignment treatment in order to prevent deterioration of the organic EL due to the formation of the alignment film by conventional baking.
- the liquid crystal display panel of FIG. 29 (a) is obtained by laminating a polymer film on a TFT array substrate 621 manufactured in advance through separate processes and a counter substrate 622 provided with a surface light emitter. By performing a rubbing treatment, an alignment function for the liquid crystal composition 624 is added to the polymer film, so that an alignment film 623 is formed. Thereafter, the alignment film 623 between the TFT array substrate 621 and the counter substrate 622 is opposed to each other, and the liquid crystal composition 624 is filled in the gap.
- FIG. 29 (a) is the organic EL film in which the alignment film in the prior art diagram shown in FIG. 27 is laminated with the organic film and the knock light is replaced with the organic EL.
- the power required for the substrate for the conventional light guide plate is several mm, whereas the glass substrate is 0.4 mm, so a thin film is being prepared.
- Japanese Patent Laid-Open No. 2000-98957 discloses a technique for reducing the thickness by reducing the backlight of a transmissive liquid crystal panel to a conventional fluorescent tube system and using an organic EL light emitting element.
- Figure 29 (b) shows the structure.
- the liquid crystal display panel includes a first electrode substrate 650, a second electrode substrate 660, and a liquid crystal layer held between the substrates.
- the first electrode substrate 650 is composed of a transparent glass substrate 651, and on the surface in contact with the liquid crystal layer, a scanning line 652, a signal line 653 (not shown), a pixel electrode 654, a TFT 655, A storage capacitor 656 (not shown) and a storage capacitor line 657 are formed.
- a transparent electrode 682 serving as a counter electrode of the liquid crystal is formed on the surface of the transparent glass substrate 681 in contact with the liquid crystal, and the substrate transparent electrode 682 of the glass substrate 681 is formed.
- an organic EL luminescence apportionment 683, 685, 687, 689 force is formed, and a light emission apportionment 684, 686, 688 force S is formed, which becomes a gap between the emission apportionments 683, 685, 687, 689. It is.
- 29 (b) shows a light guide plate for a backlight that has been conventionally required by forming a flat light emitting element such as an organic EL cover on the back surface of the substrate on which the counter electrode of the liquid crystal panel is formed.
- a flat light emitting element such as an organic EL cover
- Japanese Patent Laid-Open No. 54-126559 a technique of using a long flexible film for a substrate constituting a liquid crystal panel is disclosed in Japanese Patent Laid-Open No. 54-126559.
- the publication only shows an example of forming a simple matrix-driven black-and-white liquid crystal panel using a long flexible film film on which a transparent electrode and an alignment film are formed.
- Japanese Patent Application Laid-Open No. 54-126559 manufactures a liquid crystal panel using a long plastic substrate when a large and smooth glass substrate is expensive and difficult to manufacture.
- Japanese Patent Application Laid-Open Nos. 62-150218 and 6-27448 disclose a technique for holding a liquid crystal in a gap between a long flexible film in which an alignment film is formed on two electrodes. It has been done.
- Japanese Patent Application Laid-Open No. 2002-358024, Japanese Patent Application Laid-Open No. 2002-148607, and the like describe a long flexible film on a glass substrate.
- An example of pasting is disclosed.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-29034
- Patent Document 2 JP 2002-98957 A
- Patent Document 3 JP-A-54-126559
- Patent Document 4 Japanese Patent Laid-Open No. 62-150218
- Patent Document 5 Japanese Patent Laid-Open No. 2002-358024
- Patent Document 6 Japanese Patent Laid-Open No. 2002-148607
- Non-patent literature 1 A. Asano ana T. Kmoshita, 'Low—temperature polycrysta lline— Silicon TFT color LCD panel made of plastic substrates in Society for Information Display International Symposium Digest of Technical Papers (Society for Information Display ⁇ Boston, 200 2 )) Vol. 33, pp. 1196-1199.
- the liquid crystal panel has a configuration in which the liquid crystal is sandwiched between the electrodes. Therefore, it is necessary to form the drive electrode and the counter electrode on separate substrates.
- a TFT thin film transistor
- a glass substrate is considered to be indispensable.
- a plastic substrate may be used by using a method such as Asano. It has been.
- the backlight is manufactured in a separate process from the liquid crystal panel, and is disposed on the back surface of the liquid crystal panel.
- the transflective and transmissive liquid crystal panels require three substrates even when the organic EL is used for the backlight and the TFT is manufactured using a method such as Asano. As a result, the thickness of the liquid crystal panel is about 0.4 mm, the knocklight is about 0.2 mm, and the total thickness is required to be at least 0.6 mm.
- Thin-film / light-weight display panels require high electronic ink, have a thickness of 0.3mm, and a liquid crystal display panel that is 1 / 10th the thickness of an active matrix device. The company is developing.
- a liquid crystal display panel is formed by attaching a film having an optical function to a rectangular substrate (glass substrate or plastic substrate). Since a rectangular substrate is used, the following problems are inevitable.
- Liquid crystal display devices used in mobile phones are required to have a wide variety of display screen sizes, from 2.1 inch sizes to 15, 17 inches for personal computers and 17 inch wide to 40 inch wide sizes for televisions. ing. On the other hand, since it is difficult to provide a production line for each substrate size, it is necessary to use a rectangular large-area substrate.
- the TFT formation process in manufacturing a liquid crystal display device is similar to the process in which a semiconductor element is formed on a silicon wafer.
- a single substrate is formed.
- Increasing the number of formations has led to increased productivity, resulting in increased size.
- a large one exceeds 40 inches diagonal, so the glass substrate that is the base material has a large area exceeding lm X I.5 m. Something is proposed.
- the production line needs to use a rectangular large-area substrate in order to cope with various sizes.
- optical functional films films having optical functions (hereinafter referred to as optical functional films) are attached one by one to a substrate on which TFTs are formed and Z or a substrate on which counter electrodes are formed.
- the two substrates sandwiching the liquid crystal each have an alignment film on the surface facing the liquid crystal, and an optical functional film such as a retardation film and a polarizing plate on one surface. Is pasted.
- the thickness of the glass substrate is decreasing, but if the substrate is further enlarged, it becomes impossible to reduce the thickness of the substrate due to its own weight. As is also the case with production lines for semiconductor integrated circuits, it is even necessary to increase the thickness of the substrate.
- the thickness of the substrate increases as the liquid crystal panel screen increases in size and multiple screens with a small screen size. On the other hand, it is required to reduce the thickness of portable display devices that can be used indoors and outdoors, in bright to dark places, and from sunny to rainy.
- the manufacturing apparatus is required to have higher accuracy, and the manufacturing apparatus becomes expensive, which hinders cost reduction of the liquid crystal panel due to the increase in the size of the substrate.
- the transflective liquid crystal display panel by setting the transmittance of the pixel electrode to, for example, about 0.3 to 0.7, it is possible to obtain good visibility in both a bright place and a dark place. The sex is secured. Accordingly, the transflective liquid crystal display has a lower utilization factor of external light and a darker display than a reflective liquid crystal display having the same pixel area. In addition, the efficiency of using the light emitted from the backlight is lower than that of a transmissive liquid crystal display having the same pixel area, and the display is darkened. That is, the conventional transflective liquid crystal display has the problem that the display efficiency is low and the display is dark compared to the reflective liquid crystal display and the transmissive liquid crystal display.
- the present invention has been devised under the above circumstances. That is, a thin liquid crystal display panel The purpose is to provide. Another object is to reduce the manufacturing cost of the liquid crystal display panel by simplifying the manufacturing process.
- the present invention is a collection comprising an organic resin on a film having a flexibility with a curvature radius force of S40 mm or less and a thermal expansion coefficient of 50 1! 17 and having a long light diffusion function as follows.
- the light-collecting film is characterized in that the light bodies are formed in an array and the surface of the light-collecting member facing the surface in contact with the film is flat and narrower than the area of the surface in contact with the film.
- the film having a light diffusion function preferably has a Young's modulus of 1.5 GPa or more.
- the film having the light diffusion function is transported to the first roll force and the second roll, and a thin film can be formed on the surface during transport. Furthermore, it is preferable that the change in mechanical and optical properties is ⁇ 5% or less for a thermal history of 200 ° C. Mechanical and optical changes for a thermal history of 250 ° C More preferred is less than 5%.
- the film having a light diffusion function is preferably transparent particles and contains light diffusion particles having a refractive index different from that of the film.
- the transparent particles are preferably zinc oxide, ITO or silica, and the particle diameter is preferably 0.5 m or more and the film thickness is 1Z2 or less.
- the film having the light diffusing function and the grease of the light collector are the same.
- the resin is preferably made of acrylic resin or cyclic olefin resin.
- the light condensing film can be laminated on a long film having a light guide function having a thermal expansion coefficient of 50 ppmZ ° C or less on the surface of the light concentrator facing the light diffusion film.
- the film having a light guiding function preferably has a Young's modulus of 1.5 GPa or more.
- the film having the light guiding function is conveyed to the first roll force second roll, and the light condensing film in which the light condensing body is formed on the light diffusion layer at the time of transportation is used as the light diffusion of the light condensing body Lamination is possible on the surface facing the membrane.
- a film having a light guiding function preferably has a change in mechanical and optical characteristics of ⁇ 5% or less with respect to a thermal history of 200 ° C. On the other hand, it is more preferable that the mechanical and optical change is less than 5%.
- the film having a light guiding function preferably contains an inorganic filler, and the particle size of the inorganic filler is preferably lnm to 380nm.
- the inorganic filler is preferably made of acid titanium, zinc oxide, alumina, or acid key.
- the film having a light guide function preferably has a light transmittance of 80% or more.
- the film having a light guiding function is preferably made of acrylic resin or cyclic olefin resin.
- the resin of the film having a light diffusion function, the light collector, and the film having a light guide function are preferably made of an acrylic resin or a cyclic olefin resin that is preferably the same. .
- This functional film and the functional films of the liquid crystal functional thin film, the optical functional thin film, and the alignment film, which have the same power as the pixel electrode of the liquid crystal, are arranged opposite to each other, and the liquid crystal is sandwiched between the alignment films.
- a liquid crystal panel can be formed.
- a backlight can be formed by arranging a light source adjacent to at least one surface substantially orthogonal to the surface.
- the present invention includes a step of filling an uneven portion of a support having irregularities in the shape of a light collector with an organic resin, and the filled resin is formed into a long thin film having a light diffusion function. It is a manufacturing method of the condensing film which has the process to transcribe
- the present invention provides a process for producing a condensing film comprising a step of forming a thin film made of an organic resin on a long film having a light diffusing function, and a step of transferring the shape of the light collector to the thin film. Is the method.
- the step of transferring the shape of the light collector can be performed by pressing a mold having irregularities in the shape ability of the light collector.
- the step of transferring the shape of the light collector may include a step of curing the organic resin in a pressed state. Curing of the organic resin can be performed by ultraviolet irradiation. [0099] A step of laminating a thin film having a light guide function on the light collector may be included.
- the present invention is characterized in that a liquid crystal panel and Z or various thin films constituting a knock light are produced on a flexible base film by transfer using a roll 'two' roll process. is there.
- a backlight using a light guide plate can be manufactured using a roll-to-roll process.
- the optical functional thin film cures the resin using heat or light. If light or heat is further applied to the cured resin, problems such as decomposition of the cured resin or deterioration of properties due to progress of curing occur. For this reason, the case where the optimal hardening conditions of material cannot be selected arises.
- each functional thin film can be manufactured under the optimum conditions of the film. The reason is that since the heat applied at the time of transfer is low temperature for a short time, the functional thin film does not deteriorate.
- the film can be produced while forming a plurality of functional thin films on the film by a roll '1' roll process. Even when manufacturing a large display panel or a large number of display panels with a single substrate, it can be transported while being wound on a roll, so that it can be transported between devices in a narrow space. In addition, there are no accidents such as damage during transportation.
- the functional film and the substrate (base film) which is the main component of the backlight are the same member, warpage of the liquid crystal panel due to the difference in the thermal expansion coefficient of the material can be suppressed.
- Fig. 1 is a conceptual diagram of the production method of the present invention.
- FIG. 2 is a conceptual diagram of the production method of the present invention.
- FIG. 3 is a conceptual diagram of a polarizing film 'retardation film transfer method of the present invention.
- FIG. 4 is a conceptual diagram of a liquid crystal panel manufacturing method according to the present invention.
- FIG. 5 shows the structure of the base fill of the present invention.
- FIG. 6 is a schematic view of an alignment film manufacturing method and an alignment film transfer method.
- FIG. 7 is a cross-sectional view of the organic EL device of the present invention.
- FIG. 8 is a conceptual diagram of a production apparatus for producing a barrier film on a base film according to the present invention.
- FIG. 9 is a process cross-sectional view illustrating a method for manufacturing a thin film transistor of the present invention.
- FIG. 10 is a process cross-sectional view illustrating a thin film transistor transfer method of the present invention.
- FIG. 11 is a conceptual diagram showing a method for manufacturing a color filter of the present invention.
- FIG. 12 is a conceptual diagram showing a method for manufacturing a color filter of the present invention.
- FIG. 13 is a conceptual diagram showing a method for producing a color filter of the present invention.
- FIG. 14 is a sectional structural view of a liquid crystal panel of the present invention.
- FIG. 15 shows a method for manufacturing a liquid crystal panel.
- FIG. 16 is a sectional structural view of a liquid crystal panel of the present invention.
- FIG. 17 is a conceptual diagram showing a method for manufacturing a liquid crystal panel of the present invention.
- FIG. 18 is a sectional structural view of a liquid crystal panel of the present invention.
- FIG. 22 The relationship between the pitch and height of irregularities, which shows the good characteristics of a reflective film with a concave curved surface structure.
- FIG. 22 A cross-sectional view of a reflective film having an uneven complex curved surface structure.
- FIG. 25 A method for flattening the surface of a reflective film having irregularities.
- FIG. 27 is a sectional structural view of a conventional liquid crystal panel.
- FIG. 29 is a cross-sectional view of a conventional liquid crystal panel.
- FIG. 30 is a back light source using a light guide.
- FIG. 31 is a diagram showing the shape of a light collector.
- FIG. 32 is an overhead view of the light collector array.
- FIG. 33 is a diagram showing a manufacturing method of the light collector.
- FIG. 34 is a view showing a manufacturing method of the light collector.
- FIG. 35 is a diagram showing a method for manufacturing a light collector.
- [36] A diagram showing the structure of the light diffusion film and the light collector array.
- FIG. 39 is a cross-sectional view of a liquid crystal panel.
- FIG. 40 shows a method for manufacturing a liquid crystal panel. 41] A diagram showing a method for manufacturing a liquid crystal panel. ⁇ 42] A diagram showing a method for manufacturing a liquid crystal panel. Explanation of symbols
- the present invention provides a liquid crystal panel by forming each optical functional film TFT element and light emitting element on a thin film film made of a long substrate made of an organic resin, and bonding the film together. To manufacture.
- the liquid crystal panel according to the present invention has a configuration as shown in Figs.
- the liquid crystal panel is composed of a flat light emitting element portion and a liquid crystal element portion that serve as a backlight.
- the flat light emitting element portion constituting the backlight is a backlight using the light-collecting film of the present invention.
- the condensing film has a configuration similar to the configuration using a conventional light guide, and can be configured to be thinner than the light guide, and has an advantage that a proven light source can be used.
- the knocklight is composed of a functional film having a light collecting function (light collecting film) and a light source.
- the light collecting film is a laminated film including a light collecting body 366 and a support film 365 on a base film 368.
- the light source is formed on the side surface of the light collecting film.
- the light-collecting film of the present invention described above is formed from an organic resin on a film having a light diffusion function.
- the light collecting body is formed in an array, and is laminated with a film having a light guiding function (hereinafter sometimes referred to as a light guiding body) and a light source disposed at an end portion of the backlight.
- a light guiding body a film having a light guiding function
- a light source disposed at an end portion of the backlight.
- an element functional thin film comprising a color filter 355, a transparent electrode 356, and an alignment film 357, which constitute a part of the function of the liquid crystal element, is laminated.
- the alignment film 359 of the first functional film and the alignment film 357 of the second functional film in which the optical functional thin film and the element functional thin film are laminated are opposed to each other with a gap between them.
- a liquid crystal 358 is filled in the gap.
- optical functional thin films having optical functions and element functional thin films forming part of the functions of the elements are laminated on a support film other than the base film at the time of manufacture. These films are collectively referred to as functional films. Each optical functional thin film and element functional thin film formed on the functional film are collectively referred to as a functional thin film.
- the knocklight has a light emitting element such as an organic EL element / inorganic EL element formed on the surface, so that the entire surface emits light even though it can be a thin film. It is clear that you don't have to. For example, even a vertical cavity surface emitting laser (VC SEL) or a resonant cavity light emitting diode (RCLED) is a thin film. If it can be formed, it can be used.
- VC SEL vertical cavity surface emitting laser
- RCLED resonant cavity light emitting diode
- the color filter and the alignment film can be said to be an optical functional thin film having an optical function, although the operating force of the liquid crystal panel can be said to be an element functional thin film having an element function.
- the element functional thin film 'optical functional thin film is not limited to this example and may vary depending on the configuration of the liquid crystal panel.
- FIG. 1 is a conceptual diagram showing a method for manufacturing a liquid crystal panel using a long film made of an organic resin.
- the base film 1000 wound up in a roll is tensioned so as not to shrink, and the roll force is also sent to the take-up roll.
- various functions such as a phase difference function 1001, a polarization function 1002, and an antireflection function 1003 are sequentially given to form a functional film A having an optical function.
- FIG. 2 (a) is a conceptual diagram showing a manufacturing method for forming an element function on a base film and a manufacturing method for forming an organic EL light emitting element on the base film.
- An opaque electrode layer is formed by a physical vapor deposition method on the base film 105 fed from the feed roll, and a light emitting layer composed of an organic EL layer made of an organic material is formed by a vapor deposition method or a coating method.
- a transparent electrode is formed by a physical vapor deposition method in the same manner as an opaque electrode, and a functional film B on which a light emitting element is formed is formed and wound around a winding roll.
- FIG. 2 (b) is a conceptual diagram showing a process of transferring only a layer having an optical function from the functional film A to which an optical function is imparted to the functional film B on which a light emitting element is formed.
- Winding roll B force Functional film B is fed to the winding roll, and in the middle of the function film A, the feeding roll force is also fed. Transferred onto the element layer 106 of film B. The functional film B having the optical functional layer 103 transferred onto the element layer 106 is then wound around a winding roll.
- the characteristics required for the support substrate 102 are the same as those of the base film in terms of thermal expansion coefficient and flexibility.
- the thermal expansion coefficient and flexibility are preferably the same as the base film. If it is a thermal expansion coefficient, it is preferably 50 ppmZ ° C or less. More preferably, the difference in thermal expansion coefficient from the base film is preferably ⁇ 30% or less ⁇ 15% or less It is more preferable that
- the thermal expansion coefficient can be reduced by blending an inorganic filler.
- Inorganic fillers need to be smaller than the wavelength of light in order to maintain the transparency of the film, and when curing resin using ultraviolet rays, the particle size must be less than the required wavelength of ultraviolet rays.
- the ultraviolet rays used for photocuring are often in the wavelength range of 200nm-300nm. In this case, lnm ⁇ 200 nm or less is preferable, and lnm ⁇ m is more preferable.
- the photocurable film formed on the supporting substrate 102 can be irradiated with ultraviolet rays having a wavelength of 200 nm to 300 nm through the supporting substrate 102.
- the inorganic filler is preferably 5% to 90% by weight, more preferably 10% to 50% by weight. If it is 5% by weight or more, an effect of lowering the thermal expansion coefficient is obtained, and if it is 90% by weight or less, it is brittle and easily cracked.
- An inorganic filler may be blended so as to match the thermal expansion coefficient of the base film within the above range.
- the cover film has the same thermal expansion coefficient as that of the base film.
- Examples of the inorganic filler include titanium oxide, zinc oxide, alumina, and oxygenate.
- Examples of the method of blending the inorganic filler include a method of dispersing dry powdered silicon oxide fine particles using a mixing device having a high dispersion capacity, a colloid (sol) dispersed in an organic solvent, and other blends. The organic solvent is removed by mixing the product and depressurizing while stirring if necessary, colloid (sol) dispersed in the organic solvent and its Examples of the method include mixing other compounds and removing the solvent as necessary, followed by casting to further remove the solvent. A bead mill etc. are mentioned as an apparatus with high dispersion capability.
- the film formed on the support substrate 102 is deteriorated by moisture in the atmosphere such as a polarizing film, it is preferable to provide a gas noria layer on the surface of the support substrate 102. . When it is provided on one surface of the supporting substrate 102, it is effective to provide it on either surface, but it is more effective if it is provided on the surface on which the film is formed.
- the gas nolia layer When the film is cured by irradiation with ultraviolet light, the gas nolia layer must be transparent to ultraviolet light. For this reason, as the material of the gas barrier layer, organic materials such as polybutyl alcohol and polysalt-vinylidene, organic materials and clay minerals (Al O
- Amorphous clay minerals such as SiO-2-3H 2 O and crystalline clay minerals (Si, AD O four sides
- a thin film of an inorganic material such as acid silicate or acid aluminum. It is possible to reduce the film thickness by using an inorganic material because it is excellent in gas noliativity in a high humidity environment and is effective even if the thickness is small. Furthermore, it is possible to stack two or more of these layers.
- Organic materials can be used as a coating film 'laminated film' as a gas noria film compared to inorganic materials, so the cost is low. .
- the thickness of the gas barrier layer is preferably 1 m to 10 m in the case of organic materials and organic-inorganic composite materials, and is preferably 10 nm—: L m in the case of inorganic materials.
- organic materials and organic-inorganic composite materials if it is 1 ⁇ m or more, normal air components such as oxygen and water vapor can be sufficiently prevented from entering the liquid crystal layer and the organic EL layer. If it is 10 m or less, the physical properties of the base film, such as expansion coefficient, are not affected.
- a coating method can be used in the case of organic materials and organic-inorganic composite materials, and various thin film deposition methods can be used in the case of inorganic materials.
- a liquid organic material or a liquid such as a solution thereof is applied on a film, and dried or cured to form a film.
- Thin film deposition methods include physical growth methods such as vapor deposition, ion plating and sputtering, and chemical vapor deposition methods such as plasma CVD under reduced pressure atmosphere, catalyst CV D, and CVD under atmospheric pressure. .
- sputtering is particularly preferable because a dense film can be obtained at a low temperature.
- the film formed on the support substrate 120 is of an ultraviolet curable type, transparency is required, so that the base film detailed in the second embodiment or the like can be used.
- polyethylene resin, polypropylene resin, polyester resin, ethylene vinyl copolymer resin, polychlorinated resin resin, cellulose resin, polyamide resin, polyimide resin, polycarbonate resin, polystyrene resin, and acetic acid resin It is possible to use a resin with a light transmission function.
- a cover film made of a resin having excellent moisture shielding properties and the like can be formed by simply providing a gas barrier layer on the support substrate 120.
- a resin include polyethylene, polypropylene, polyvinyl alcohol, senololose, polycarbonate, polyesterol, attalinole, polyetherolene, polyamide, polyimide, and polyolefin.
- celluloses such as triacetyl cellulose, polycarbonates such as polycarbonate and polyethylene terephthalate, and acrylics are preferably used.
- the cover film is desirably chemically and thermally stable and easily peelable from the thin film layer.
- a thin sheet-like material such as polyester, polyethylene, polypropylene, polyethylene terephthalate, or polybulualcohol has high surface smoothness and is preferred. You may use what carried out the mold release process on the surface in order to provide peelability.
- the gas barrier layer can be provided on both sides or one side of the force bar film.
- the gas barrier layer is provided on one surface of the cover film, it is more effective to provide the gas barrier layer on the surface of the cover film in contact with the film formed on the support substrate 120.
- FIG. 3 is a conceptual diagram showing a part of the manufacturing process of the method for manufacturing the organic EL light emitting device.
- the functional film force in which a reflective electrode is formed on the base film 105 is fed from a feed roll to a scraping roll.
- the functional film on which the reflective electrode is formed is formed into a thin film made of organic material that becomes the next light-emitting layer in the middle of being wound around the winding roll.
- the organic EL layer 110 is formed by forming an organic EL layer 110 made of an organic material to be a light emitting layer on the reflective electrode by vapor deposition or coating.
- Fig. 3 (a) shows the coating method as an example. In the case of the coating method, the light emitting layer is formed by coating 1010, dried and cooled 1020, and then wound on a take-up roll. In FIG. 3 (a), since the transparent electrode is not continuously formed, the cover film 111 is laminated on the organic EL layer 110 by the laminating method (cover film pasting 1030), and then wound around the take-up roll. .
- the cover film is preferably chemically and thermally stable and easily peelable from the thin film layer.
- a thin sheet-like material such as polyethylene, polypropylene, polyethylene terephthalate, or polybulualcohol having high surface smoothness is preferred. You may use a surface that has been subjected to a mold release treatment to give it releasability.
- a transparent electrode is then formed on the organic EL layer 110 by vacuum deposition or a sputtering method, thereby completing the organic EL light emitting device.
- the cover film 111 is formed on the transparent electrode, and the film is scraped off to the scissor opening.
- the functional film on which the organic EL light emitting element is formed is sent out from the roll roll, the cover film on the functional film is peeled off 1040, and then polarized on the functional thin film layer (transparent electrode) 112 on the functional film. Laminate the film by the laminating method (Transfer of polarizing film 1050).
- the cover film 111 is peeled off, and then the functional film is transferred by the transfer roller 2000 through the support film 115.
- a polarizing film 11 3 is laminated on the functional thin film layer (transparent electrode) 112 by a laminating method.
- the support film 115 is peeled off, the polarizing film 113 is exposed, and the retardation film 116 is laminated on the polarizing film 113 by a laminating method (transfer of the retardation film 106 0)
- the retardation film 116 is transferred onto the polarizing film 113 by the transfer roller 2000 via the cover film 111 after the support film 115 is peeled off.
- the image may be transferred directly onto the functional thin film 112 with the transfer roller 2000, but the functional thin film 112 is transferred via the film. It is preferable because dust and scratches do not enter the film 113 and the retardation film 116.
- the cover film is preferably a protective film having scratch resistance.
- a polyester resin or polyethylene resin is preferable.
- the gap between the support film and the cover film may be peeled off first.
- the transfer using the transfer roller includes a pressure bonding method, a thermocompression bonding method, and a transfer using an adhesive. Which transfer method is used is only a design problem.
- the cover film 111 may be laminated on the retardation film 116 as in FIG.
- a peeling layer may be provided between the film and the thin film.
- a flat base or roller may be provided on the opposite surface through the transfer roller film.
- an adhesive layer may be provided on the cover film.
- the adhesive layer preferably adheres when the cover film is laminated to the functional thin film layer and can be easily peeled when peeled.
- an adhesive whose adhesive strength is lowered by ultraviolet rays or heat is preferable.
- a method for manufacturing a liquid crystal panel with a backlight will be described with reference to the conceptual diagram shown in FIG. [0164]
- a barrier layer is formed (barrier layer formation 801) on the thin film having the first organic film force as the base film.
- the purpose of the barrier layer is to prevent interaction between the material used in the subsequent process and the material of the base film. Inorganic materials such as SiO and SiON are used for this purpose
- a retardation layer is formed by coating, for example, a polymerizable liquid crystal on the film substrate as a material having optical anisotropy (retardation layer formation 802). Thereafter, a layer having a polarization function is formed on the retardation layer (polarization layer formation 80 3). This step is realized, for example, by laminating a thin film having a polarizing function, which is separately prepared, on a film substrate. Next, a circuit having a thin film transistor force formed by a conventional manufacturing method is transferred onto a glass substrate on a glass substrate to form a TFT circuit layer (TFT transfer 804).
- TFT transfer 804 TFT transfer 804
- a color filter layer is formed by transferring the color filter (CF), Z black matrix (BM), and spacers, previously formed on the dry film, to the film substrate all together (color filter formation 805).
- the first functional film 820 is completed.
- the color filter material may be applied to the film substrate by an inkjet method.
- a reflective electrode is formed on the base film (reflective electrode formation 806).
- an organic EL layer is formed (organic EL layer formation 807).
- the organic EL material is a low molecular weight material, it is formed using a vapor deposition method, and when it is a high molecular weight material, it is formed using a method such as an inkjet coating method.
- a transparent electrode made of a conductive transparent material to be the upper electrode of the organic EL is formed (upper electrode formation 808) to complete an organic EL element layer that serves as a light emission source of the backlight.
- a noria layer is formed on the upper surface of the organic EL element (barrier layer formation 80 9) to form a protective layer, and the retardation layer (retardation layer formation 811) and polarizing layer (polarizing layer) are formed as in the first functional film. Forming 810).
- the second functional film 830 is completed by uniformly forming a transparent electrode to be the upper electrode of the liquid crystal element (transparent electrode formation 812).
- first functional film 820 and the second functional film 830 are also cut in roll force. After that, each is subjected to an alignment treatment 813, a sealing material is applied to the periphery of the display area and bonded together, liquid crystal is injected 814, and the injection port is sealed 815 to produce an active matrix liquid crystal panel with backlight. Is done.
- the sealant is displayed. Applying to the periphery of the area, bonding the first functional film and the second functional film, cutting, injecting liquid crystal, sealing the injection port, and manufacturing an active matrix liquid crystal panel with backlight May be. At this time, the first functional film and the second functional film are bonded together if the functional thin film surfaces 105 of the respective functional films are opposed to each other so that the longitudinal directions of the respective functional films are perpendicular to each other. Alignment is easy (see Fig. 5 (c)).
- the functional thin film 112 is formed while the film is wound from roll to roll.
- the roll for feeding is in contact with the functional thin film 112 formed on the base film 105, the roll and the surface of the functional thin film 112 come into contact with each other, causing a problem that dust adheres to the surface of the functional thin film 112. .
- the optical functional layer and the functional element layer formed on the base film 105 are formed so as to be separated from the end face force orthogonal to the base film sending direction. Since the base film 105 forms a functional element at the time of delivery, it must be designed so that no stagnation occurs on the surface of the base film. The distance from the end surface is determined by the shape of the feed roll, and perforations may be provided on the end surface of the base film 105.
- Each functional film described in the embodiment can be transported to the next step while being wound around a roll, or can be stored while being wound around a roll.
- the work of each step is completed in a state of being wound on a roll.
- the state of being wound on a roll is easy to convey and store, and is narrower than a conventional manufacturing method using a substrate.
- the base film which is a support substrate for forming the liquid crystal display panel, is thin and highly heat resistant, particularly transparent to the light in the visible light region and optically isotropic, that is, a phase difference. It is required to be a plastic material with a small force S. In addition to the support substrate forming the liquid crystal panel, it can also be used as a support film for a functional thin film.
- the thickness is no upper limit for the thickness if it is only used for the roll '1' roll process, but it is thinner than 400 m of the glass substrate in consideration of the reduction in size and weight of the entire display device. It is preferable that the thickness is less than 200 m of the plastic substrate. In order to satisfy the demand for small size and light weight of the entire display device, 10 ⁇ m to 150 ⁇ m is preferable, and 10 ⁇ m to 100 ⁇ m is more preferable. If it is 10 ⁇ m or more, no wrinkles or cracks will occur during transportation.
- the mechanical and optical change is not more than 5% for a temperature history of at least 200 ° C, more preferably for a temperature history of 250 ° C. More preferably, the optical change is 5% or less.
- Optical change refers to deterioration of light transmission and increase of phase difference due to temperature, and mechanical deformation. Indicates a deterioration in flexibility and a change in dimensions.
- the visible light (380 nm-800 nm) region is required. At least 450 nm to 700 nm, more preferably 400 nm to 700 nm, and most preferably high transparency in the visible light region of 380 nm to 800 nm! If it is 450nm-700nm and the transparency is high, it is practically acceptable. If it is 400nm-700nm, it is more preferable, but it is almost sufficient even when exact color is required, but more preferably in the visible light region. It is desirable to have high light transmission over the entire 380nm-800nm range! The wider the transparent wavelength region, the more the image display device that can reproduce the color close to the original color can be manufactured. There is no particular problem if the light transmittance (wavelength, 550 nm) is 80% or more, more preferably 85% or more, more preferably 90% or more with respect to the desired base film thickness.
- the retardation (wavelength, 550 nm) must be negligible for a 1Z4, 2 ⁇ retardation film.
- the wavelength in the visible light region is 550 nm
- the value in the normal direction of the plane of the base film is 10% or less (approximately 10 ⁇ m or less) of 1Z4, more preferably 5% or less. (About 5nm or less). If the phase difference (wavelength, 550 nm) is less than lOnm, there will be no problem.
- acrylic resin or cyclic olefin resin it is preferable to use acrylic resin or cyclic olefin resin.
- the base film is required to have a small dimensional change during the process of manufacturing the display, and the thermal expansion coefficient is preferably 50 ppmZ ° C or less.
- Plastic materials can have a low coefficient of thermal expansion by incorporating an inorganic filler.
- Inorganic fillers need to be smaller than the wavelength of visible light in order to maintain the transparency of the film, and if the particle size is 380 nm or less, the transmittance at the short wavelength end of visible light is impaired, but practically particularly. Does not cause a problem. More preferably, it is 1 lOOnm, and in this case, transparency is not impaired in the entire visible light region. Even if it is less than lnm, there is no problem, but with current technology lnm It is difficult to produce the following fillers.
- the base film When the base film is used as a support film for the optical functional thin film, it may be hardened by ultraviolet rays.
- the particle size of the inorganic filler is preferably lnm-200 nm, more preferably lnm-200 nm. There is no problem even if it is less than lnm, but it is difficult to produce fillers less than lnm with the current technology.
- the inorganic filler is preferably 5% to 90% by weight, more preferably 10% to 50% by weight. If it is 5% by weight or more, an effect of lowering the thermal expansion coefficient is obtained, and if it is 90% by weight or less, it is brittle and easily cracked.
- Examples of the inorganic filler include titanium oxide, zinc oxide, alumina, and oxygenate.
- Examples of the method of blending the inorganic filler include a method of dispersing dry powdered silicon oxide fine particles using a mixing device having a high dispersion capacity, a colloid (sol) dispersed in an organic solvent, and other blends. After removing the organic solvent by mixing the product and reducing the pressure while stirring, if necessary, the colloid (sol) dispersed in the organic solvent and the other compound are mixed and desolvated as necessary. And a method of removing the solvent by casting. A bead mill etc. are mentioned as an apparatus with high dispersion capability.
- the base film of the second embodiment is a thin film made of an organic resin
- normal air components such as oxygen and water vapor enter the liquid crystal layer and the organic EL layer.
- a gas barrier layer that prevents the entry of air components may be provided on one side or both sides of the base film. When it is provided on one side of the base film, it can be effective on either side, but it is more effective when provided on the side on which the functional thin film is formed.
- the gas nolia layer must be transparent because the substrate is required to transmit light.
- organic materials such as polybutyl alcohol and polysalt-vinylidene, organic materials and clay minerals (Al 2 O 2 SiO 5 5 0, Al 2 O 3 -SiO 2 -2H 2 O 2
- Amorphous clay minerals such as 2 3 2 2 2 3 2 2 and crystalline clay minerals (Si, AD O tetrahedral sheet, (Al, M
- Organic-inorganic composite materials with inorganic materials such as (O, OH) octahedral sheet), silicon oxide and acid
- inorganic materials such as (O, OH) octahedral sheet), silicon oxide and acid
- a thin film of an inorganic material such as aluminum can be given. It is possible to reduce the film thickness by using an inorganic material because the humidity is high and the gas noria property is excellent in the environment and the effect is high even if the thickness is small. Furthermore, two or more of these layers can be stacked.
- Organic materials are less expensive because they can be used as a coating film 'laminated film' as a gas noria film compared to inorganic materials, but they cannot be denied that they are inferior to gas noria films that are inorganic materials in terms of temperature dependency and moisture resistance. .
- the thickness of the gas barrier layer is preferably 1 m to 10 m in the case of organic materials and organic-inorganic composite materials, and is preferably lOnm—: L m in the case of inorganic materials.
- L m inorganic materials.
- it is 1 ⁇ m or more, normal air components such as oxygen and water vapor can be sufficiently prevented from entering the liquid crystal layer and the organic EL layer. If it is 10 m or less, the physical properties of the base film, such as expansion coefficient, are not affected.
- a coating method can be used in the case of organic materials and organic-inorganic composite materials, and various thin film deposition methods can be used in the case of inorganic materials.
- a liquid organic material or a liquid such as a solution thereof is applied on a film, and dried or cured to form a film.
- Thin film deposition methods include physical growth methods such as vapor deposition, ion plating and sputtering, and chemical vapor deposition methods such as plasma CVD under reduced pressure atmosphere, catalyst CV D, and CVD under atmospheric pressure. .
- sputtering is particularly preferable because a dense film can be obtained at a low temperature.
- the second embodiment it is transparent and optically isotropic with respect to light that is thin and has high heat resistance, particularly light in the visible light region, that is, a phase difference (a light delay amount).
- a phase difference a light delay amount
- a small base film is shown, it is possible to use an optically anisotropic film.
- the base film may have a retardation function and a polarization function.
- the phase difference of the base film is ⁇ ⁇ 2 and ⁇ ⁇ 4
- the base film has a polarization function that does not need to provide a retardation function
- the polarization function is used as a base. There is no need to apply to the film later.
- the base film when a light emitting function is given to the base film later, it is possible to adopt a structure in which light does not pass through the base fill, as will be described later.
- the base film is not required to have high light transmittance.
- the base film itself can have a gas barrier function.
- the DA converter 'liquid crystal drive circuit, etc. which has been externally attached for the purpose of reducing the number of parts of the liquid crystal display, narrowing the frame, and reducing power consumption, be integrated on the substrate. For this reason, the transistor performance of the pixel driving thin film transistor cannot be lowered.
- the glass substrate is removed, and a thin film transistor formed on the glass substrate is transferred to a base film.
- a method of manufacturing a polysilicon thin film transistor includes a high temperature process and a low temperature process.
- the barrier film is preferably a nitride film or an oxynitride film whose etching rate is preferably low with respect to the glass etching solution.
- the protective film is required to be made of a material that can withstand a strong acid such as hydrofluoric acid. Also, during etching, it is necessary to prevent the temperature of the etching solution from changing so that the etching proceeds uniformly.
- the retardation film of the fourth embodiment will be described.
- the coating type retardation film will be described.
- a polymerizable liquid crystal composition containing a liquid crystalline compound having a polymerizable group is coated on a support by a general coating method to form a liquid crystal thin film.
- the surface of the liquid crystal thin film is not in contact with the substrate!
- the surface is dedusted dry air!
- the surface is preferably in contact with an inert gas such as nitrogen, more preferably an inert gas such as nitrogen.
- the polymerizable liquid crystal composition is aligned at a temperature within the liquid crystal phase formation temperature range and then polymerized to form a solid thin film.
- the thickness and birefringence of the retardation film are selected according to the phase control characteristics required by the liquid crystal display panel.
- the coating type retardation film directly coats the polymerizable liquid crystal composition on the support, so that the film thickness can be remarkably reduced compared to the bonding type retardation film, and it is 100 ⁇ m or less. Can be used.
- the film thickness of the coating type retardation film is preferably 0.1 ⁇ m-30 ⁇ m, more preferably 0.3-15 ⁇ m, and further preferably 0.5 m-10 m. Birefringence is usually variable in the range of 0.0 to 0.5 by changing the composition of the polymerizable liquid crystal composition, and the film thickness and birefringence are as required as in 1Z2 and 1Z4 wavelength plates. You can choose from the amount of phase difference and the ease of manufacturing conditions.
- the polymerizable liquid crystal compound used in the present embodiment is not limited as long as it can be applied to a plastic sheet and can be aligned using the liquid crystal state of the compound.
- the polymerizable group needs to be a compound containing at least a part of the temperature range so that the polymerizable group does not undergo thermal polymerization in the temperature range to be in a state. Furthermore, it is necessary to be able to apply or align within the temperature range.
- the film having the phase difference control function in the present invention is preferably as the thickness is thinner, that is, a film having a high birefringence. Specific examples include compositions containing the following compounds.
- N represents an integer of 0 or 1
- m represents an integer of 1 to 4
- Y 1 and Y 2 are each independently a single bond, -CH CH -CH ⁇ -OCH COO OCO C
- a coating type retardation film is provided with an alignment film on a transparent support, and after rubbing treatment if necessary, a layer containing a polymerizable liquid crystal is coated thereon, and an unnecessary solvent is dried. Then, the liquid crystals are aligned and polymerized by decomposing the added light or thermal polymerization initiator by UV irradiation or heating. If necessary, a protective layer may be applied thereon.
- the polymerizable liquid crystal is preferably applied after being diluted with an appropriate solvent. Since the properties differ depending on the structure of the liquid crystal, the solvent and concentration to be used generally cannot be specifically limited, but considering the uniformity of the thin film, it is preferable to use a solvent with high solubility, such as halogens such as methylene chloride and chloroform. Compounds, ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate, dimethylacetamide, dimethylformamide, and amides such as methyl monopyrrolidone, such as isopropanol and perfluoropropanol Naa Lucols are preferably used.
- a solvent with high solubility such as halogens such as methylene chloride and chloroform.
- Examples of the alignment film provided on the support include a SiO vapor deposition film of an inorganic oblique vapor deposition film, a polyimide film rubbed with an organic polymer film, and the like.
- a typical example of the organic alignment film is a polyimide film.
- polyamic acid for example, AL-1254 manufactured by JSR Corporation, SE-7210 manufactured by Nissan Chemical Co., Ltd.
- polyamic acid for example, AL-1254 manufactured by JSR Corporation, SE-7210 manufactured by Nissan Chemical Co., Ltd.
- a coating film of alkyl chain-modified POVAL for example, MP203 manufactured by Kuraray Co., Ltd., R1130, etc.
- the orientation ability can be imparted only by rubbing as much as necessary.
- most organic polymer films that form a hydrophobic surface such as polyvinyl butyral and polymethylmetatalylate can impart liquid crystal alignment capability by rubbing the surface.
- a typical example of an inorganic oblique vapor deposition film is a SiO oblique vapor deposition film.
- This is an alignment film in which an oblique vapor deposition film having a thickness of about 20 to 200 nm is formed by applying SiO evaporation particles to the support surface in an oblique direction in the vacuum chamber.
- the optical axis of the liquid crystal layer is directed in a specific direction on a plane perpendicular to the support surface including the locus of the SiO deposited particles flying.
- Other methods for aligning the polymerizable liquid crystal coated on the support include magnetic field alignment and electric field alignment.
- a liquid crystal compound can be applied on a support and then oriented obliquely at a desired angle using a magnetic field or an electric field.
- a general coating method can be used. That is, A liquid crystal thin film can be formed on the support through a drying process by a coating method such as Lexo Mark J, Gravure Mark J, Dip Coat, Curtain Coat, Etrusion Coat and the like.
- the laminating type retardation film is obtained by laminating a retardation film prepared in advance to a base film via an adhesive and an adhesive.
- an aromatic polyamide or an aromatic polyimide in that it can achieve an unprecedented thin film film while maintaining the dimensional stability required during LCD production. .
- the thickness of the retardation functional layer can be suppressed to about several microns.
- a polycarbonate resin film, a polyethersulfone resin film, a polysulfone film having a thickness of 60 ⁇ m or more, which has been conventionally used, are used.
- a thin film can be formed as compared with films such as a resin film, a cyclic polyolefin resin film, a cellulose resin film, and an acrylic resin film.
- aromatic polyamide for example, those containing 50 mol% or more of repeating units represented by the following formulas (2) and Z or formula (3) are preferred, and those having a strength of 70 mol% or more are more preferred.
- the repeating unit force is preferably 50 mol% or more, more preferably 70 mol% or more.
- Arl, Ar2, Ar3 are, for example, [0229] [Chemical 5]
- XY is O 2 —CH 2 CO— —SO 2 S
- some of the hydrogen atoms on these aromatic rings are halogen groups such as fluorine, chlorine and bromine, nitro groups, alkyl groups such as methyl, ethyl and propyl groups (especially methyl groups), methoxy Group, an ethoxy group, a propoxy group, an alkoxy group such as an isopropoxy group, a group substituted with a substituent such as a hydroxy group, a trifluoromethyl group, etc., and a hydrogen in an amide bond constituting a polymer. In which is substituted by other substituents.
- halogen groups such as fluorine, chlorine and bromine, nitro groups, alkyl groups such as methyl, ethyl and propyl groups (especially methyl groups), methoxy Group, an ethoxy group, a propoxy group, an alkoxy group such as an isopropoxy group, a group substituted with a substituent such as a hydroxy group, a trifluoromethyl group, etc., and
- the above aromatic ring is in a para-orientation position, that is, a force in which divalent bonds are bonded coaxially or in parallel. 50% by mole or more, preferably 75% by mole or more of the total aromatic ring Merge is preferred because the film has high rigidity and good heat resistance.
- the above aromatic ring is in the para-orientation position, that is, a force in which divalent bonds are bonded coaxially or in parallel. 50% by mole or more, preferably 75% by mole or more of the total aromatic ring The coalescence is preferable because the film has high rigidity and good heat resistance.
- An example of the para-orientation position when there are two aromatic rings is shown in Equation (7).
- the aromatic polyamide used in the present invention preferably contains 50 mol% or more of the repeating units represented by the general formula (2) and Z or the general formula (3).
- the returned units may be copolymerized or blended! /.
- the retardation film used in the present invention has a thickness of 5 mm to reduce the thickness of the display. ⁇ ! ! ! -M is preferred. If the thickness is 1 ⁇ m or more, the aromatic polyamide film has high rigidity and high heat resistance, so that the flatness will not be deteriorated by heating during use, and the phase difference will not become large. . Moreover, if it is 50 m or less, the light transmittance does not become small.
- the thickness is preferably 2 to 30 ⁇ m, more preferably 2 to 15 m, further preferably 3 to 10 ⁇ m, and most preferably 3 to 8 ⁇ m.
- the aromatic polyimide in the present embodiment includes one or more aromatic rings and imide rings in a polymer repeating unit, and the repeating unit represented by the formula (8) and Z or the formula (9) Those containing 50 mol% or more are preferred, and more preferably 70 mol% or more. [0237] [Chemical 7]
- Ar and Ar contain at least one aromatic ring and two carbo-forms that form an imide ring.
- the ru group is bonded to an adjacent carbon atom on the aromatic ring.
- This Ar is an aromatic tetracar
- Z is selected from O—, —CH 1, CO—, 1 SO —, 1 S—, —C (CH 2) etc.
- Ar is derived from carboxylic anhydride or this halide.
- Ar, Ar are for example [0241] [Chemical 10]
- XY is O -CH CO -SO S -C (CH) etc.
- some of the hydrogen atoms on these aromatic rings are halogen groups (especially chlorine), nitro groups, alkyl groups having 1 to 3 carbon atoms (particularly methyl groups), alkoxy groups having 1 to 3 carbon atoms, etc.
- halogen groups especially chlorine
- nitro groups especially nitro groups
- alkyl groups having 1 to 3 carbon atoms particularly methyl groups
- alkoxy groups having 1 to 3 carbon atoms etc.
- the polymer contains an amide bond
- those in which the hydrogen in the amide bond is substituted by another substituent are also included.
- the aromatic polyimide of the present invention contains 50 mol% or more of the repeating units represented by the formula (8) and Z or the formula (9), and less than 50 mol% includes other repeating units. It may be polymerized or mixed.
- the retardation film of the present invention has a retardation of 50-3, OOOnm at a wavelength of 550 ⁇ m. Preferably, it is 60-500 nm, more preferably 60-380 nm, and still more preferably 80-280 nm.
- the phase difference of the film should be appropriately designed, for example, as a 1/2 ⁇ plate or a 1Z4 ⁇ plate, depending on the application. If the retardation is in the above range, aromatic polyamide or Even if a thin film is formed using an aromatic polyimide, a film having excellent optical properties and processability can be obtained.
- the retardation film in the present embodiment has a dimensional change rate at 150 ° C in the slow axis direction and the direction perpendicular to the slow axis direction of 2% or less, and when it is processed such as bonding. No wrinkle is generated, and changes in optical properties due to tension fluctuations under heating are suppressed. Therefore, it is preferable. More preferably, it is 1.5% or less, and further preferably 1% or less.
- the lower limit of the dimensional change rate is preferably as low as possible, most preferably 0%.
- the slow axis here is the direction in which the phase difference is the largest in the plane, and in the case of a phase difference film, it is generally the direction in which the draw ratio is the largest.
- the retardation film in this embodiment does not change the phase difference due to the photoelastic effect even when exposed to temperature and external force during processing, and the color tone of the liquid crystal display does not partially decrease. Refraction can be obtained. Furthermore, since it is a film having a large photoelastic coefficient, it can be thinned, and since it has excellent heat resistance and rigidity, distortion hardly occurs even under high temperature and high tension.
- the light transmittance power is 3 ⁇ 40% or more at all wavelengths from 450 nm to 700 nm. More preferably, the light transmittance is 85% or more, and more preferably 90% or more.
- the film of the present invention preferably has a light transmittance at 400 nm of 65% or more. More preferably, the light transmittance at 400 nm is 75% or more, and most preferably 90% or more. When the light transmittance at 400 nm in the near-ultraviolet region is 65% or more, better transparency is obtained.
- the film according to the present embodiment has resistance to the force applied at the time of processing and use, in the measurement according to JIS-C2318, to have a Young's modulus force GPa of at least one direction. Is preferable because it becomes even better.
- a thin film can be formed by having a Young's modulus force of at least one direction GPa.
- the Young's modulus in all directions is less than GPa, deformation may occur during processing. In addition, there is no upper limit for Young's modulus, but if the Young's modulus exceeds 20 GPa, the toughness of the film decreases, and film formation and processing may become difficult.
- the Young's modulus is more preferably 8 GPa or more, and still more preferably lOGPa or more.
- the film of the present embodiment preferably has a thermal expansion coefficient of 50-OppmZ ° C from 80 ° C to 120 ° C.
- the coefficient of thermal expansion is measured during the cooling process after the temperature is raised to 150 ° C using TMA.
- the initial sample length at 25 ° C and 75RH% is the test at LO and temperature T1. If the sample length at the temperature T2 is L2 and the sample length is L2, the thermal expansion coefficient from Tl to T2 can be calculated by the following equation.
- the coefficient of thermal expansion is more preferably 30-OppmZ ° C, and further preferably 20-OppmZ ° C.
- the film of the present embodiment preferably has a humidity expansion coefficient of 200-OppmZ% RH from 30% RH to 80% RH at 25 ° C.
- Humidity expansion coefficient High temperature and high humidity Fix to a lcm width and a test length of 15cm, dehumidify to a certain humidity (about 30% RH), and after the film length becomes constant, humidify (about 80% RH) Then it begins to grow due to moisture absorption. After about 24 hours, the moisture absorption reaches equilibrium and the film elongation reaches equilibrium. Calculate from the elongation at this time using the following formula.
- Humidity expansion coefficient ((cmZcm) /% RH) Elongation Z (Test length X Humidity difference)
- the humidity expansion coefficient is more preferably 100-OppmZ% RH, and even more preferably 30-OppmZ% RH. Since the thermal expansion coefficient and humidity expansion coefficient are small, the dimensional change due to the environment is small, and the optical characteristics such as the phase difference are uneven.
- the film of the present embodiment may be used as a single retardation film, depending on the purpose.
- They may be laminated with the same or different retardation films.
- Various methods can be used to obtain the aromatic polyamide.
- a low temperature solution polymerization method an interfacial polymerization method, a melt polymerization method, a solid phase polymerization method, and the like can be used.
- low temperature solution polymerization that is, when diamine power with carboxylic acid dichloride is obtained, it is synthesized in an aprotic organic polar solvent.
- Examples of the carboxylic acid dichloride include terephthalic acid dichloride, 2-chloro-terephthalic acid dichloride, isophthalic acid dichloride, naphthalene dicarboxyl chloride, biphenyl-dicarbol chloride, turf-dicarboxyl chloride and the like. Strength To obtain the aromatic polyamide film of this embodiment, 2-chloro-terephthalic acid dichloride or terephthalic acid dichloride is used.
- examples of the aprotic polar solvent used include sulfoxide solvents such as dimethyl sulfoxide and jetyl sulfoxide, N, N-dimethylformamide, N, N- Formamide solvents such as jetylformamide, N, N-dimethylacetamide, N, N-acetamide solvents such as cetylacetamide, N-methyl-2-pyrrolidone, N-biluluone, pyrrolidones such as 2-pyrrolidone Solvent, phenol, o-, m- or p-cresol, xylenol, halogenated phenol, catechol and other phenol solvents, hexamethylphosphoramide, ⁇ -butyrolatathone, etc. It is desirable to use it alone or as a mixture.
- aromatic hydrocarbons such as xylene and toluene can be used.
- an alkali metal or alkaline earth metal salt can be added to the solvent.
- the aromatic polyamide of the present embodiment may contain 10% by weight or less of an inorganic or organic additive for the purpose of surface formation, processability improvement, and the like.
- the additive may be colorless or colored, but a colorless and transparent material is preferred in order not to impair the characteristics of the transparent aromatic polyamide film of the present embodiment.
- Additives for surface formation include, for example, SiO, TiO, Al 2 O, CaSO, BaSO for inorganic particles
- Preferred organic particles include, for example, particles having an organic polymer force such as crosslinked polyvinyl benzene, crosslinked acryl, crosslinked polystyrene, polyester particles, polyimide particles, polyamide particles, and fluororesin particles, or the above-mentioned organic particles on the surface.
- Inorganic particles that have been treated with high molecules such as coating.
- a dye to the aromatic polyamide of the present embodiment to combine the color tone compensation function.
- the dye any of inorganic pigments such as cobalt blue and organic dyes such as phthalocyanine can be suitably used.
- These polymer solutions may be used as a film-forming stock solution as they are, or once the polymer is isolated and then redissolved in the above organic solvent or an inorganic solvent such as sulfuric acid and used as a film-forming stock solution. You may do it.
- the film-forming stock solution prepared as described above is formed into a film by a so-called solution film-forming method.
- the solution casting method includes a dry-wet method, a dry method, a wet method, etc., and the film may be formed by a shift method, but here, the dry-wet method will be described as an example.
- the stock solution is extruded onto a support such as a die-powered drum or endless belt to form a thin film, and then the solvent is scattered from the strong thin film layer until the thin film has self-holding property.
- dry. Drying conditions can be performed, for example, within a range of room temperature and 220 ° C within 60 minutes.
- the surface of the drum and endless belt used in this drying process If it is smooth, a film having a smooth surface can be obtained.
- the film after the dry process is peeled off from the support and introduced into the wet process, desalted and desolvated, and further subjected to stretching, drying and heat treatment to form a retardation film.
- Stretching is 0.8-8 as a draw ratio as a draw ratio (Area ratio is defined by a value obtained by dividing the film area after stretching by the area of the film before stretching. 1 or less means relaxation) It is preferable that it is within the range of 1. 3-8.
- heat treatment heat treatment is preferably performed at a temperature of 200 ° C. to 500 ° C., preferably 250 ° C. to 400 ° C. for several seconds and for several minutes. Furthermore, it is effective to slowly cool the film after stretching or heat treatment, and it is effective to cool it at a rate of 50 ° C. or less.
- the film obtained from the aromatic polyamide of the present embodiment may be a single layer film or a laminated film.
- a polarizing film will be described as a fifth embodiment of the present invention.
- a polarizing film that can be preferably used in the present embodiment is one that is formed by the following method (1) or (2), and then only the polarizing functional layer is transferred to the base film by heat, pressure, adhesive, or the like.
- a release film as a supporting substrate for the polarizing film separately and forming the polarizing functional layer on the release film in a state where it can be peeled off
- Fixing with pressure, adhesive, etc. is another useful technique.
- a resin pellet containing iodine and Z or a dichroic dye is formed into a film by a method such as melt extrusion or solution casting, and then the film is stretched to draw iodine and Z or a dichroic dye.
- the polarizer is strongly uniaxially oriented, and the polarizer is further bonded to the base film with heat, pressure, pressure sensitive adhesive, adhesive, or the like.
- the resins used here are polybulal alcohol, partially formalized polybulal alcohol, partially saponified polymer of ethylene 'acetate butyl copolymer, and other powerful polybulal alcoholic resins, polyolefin resins, acrylic resins, Examples include polyester resins such as PET (polyterephthalate) and PEN (polyethylene naphthalate), polyamide resins, polyamideimide resins, polyimide resins, polycarbonate resins, and polysulfone resins. it can.
- a color filter as the sixth embodiment will be described.
- Film-type color filters form black (black matrix), red, green, and blue (color filters) layers on a support substrate.
- these four color filter resin layers are formed on a support substrate, and then sequentially transferred onto a color filter support substrate.
- a photosensitive colored resin or a colored resin may be used.
- a photosensitive colored resin to be a four-color filter is formed on a separate first support substrate.
- a cover film is laminated on the photosensitive resin and rolled up.
- the first support substrate is bonded to the second support substrate through the photosensitive colored resin layer.
- First support substrate side force Expose through a mask, peel off first support substrate after exposure, develop and dry.
- the drying differs depending on the type of the crosslinking material contained in the photosensitive resin, it is essential that the temperature is lower than the temperature at which the crosslinking reaction starts. Normally, there is a relationship between the cross-linking material and the production equipment, so the conditions are determined and determined before production, but a temperature 30 ° C-50 ° C lower than the temperature at which the cross-linking reaction starts is adopted. The lower limit is set so that the drying time does not become too long, and the upper limit is determined by removing unnecessary parts by development and not causing the lower part to attract the bottom.
- the black matrix is first transferred to a second support substrate for color filter (hereinafter abbreviated as CF support substrate) to form a black matrix layer.
- CF support substrate for color filter
- exposure, development, and drying are performed from the first support substrate side to sequentially form each color. In this way, all four color filters are on the CF support substrate.
- the color filter layer is completed by being transferred to and formed on.
- the completed color filter layer is laminated, for example, on a functional film on which a thin film transistor (hereinafter abbreviated as TFT), wiring, and pixel electrodes are formed.
- TFT thin film transistor
- pixel electrodes are formed on the color filter layer.
- a spacer layer or a transparent electrode that defines the interval between the opposing alignment films may be formed.
- the photosensitive resin layer is bonded to and peeled from the first support substrate and the cover film, it is preferable that the photosensitive resin layer be weakly adhered.
- Chromium may be deposited by physical vapor deposition.
- the ink jet type color filter draws a colored resin composed of a pigment directly on a film by an ink jet method.
- Black matrix, red, green, and blue color filter layers can be drawn directly on the surface of the functional film where color filters are to be formed, or color filters are formed on the support substrate and transferred to the functional film by the transfer method. You may do it.
- chromium may be deposited on a supporting substrate (same as a film type CF base material) by physical vapor deposition.
- An alignment film will be described as a seventh embodiment of the present invention.
- liquid crystal panel of the present invention can be assembled as follows.
- a photo-alignment film is formed by performing photo-alignment operation and polymerization operation on each of the cut substrates such as the functional films A and B. Next, after a sealing material serving as a spacer is provided at a desired position on the surface provided with the photo-alignment film, the liquid crystal is dropped and then bonded.
- 3. 1 and 2 are methods of filling the substrates cut from the functional films A and B with liquid crystal. After applying the photo-alignment material on the support substrate and drying it, the photo-alignment operation and the polymerization operation are carried out. Create an alignment film, transfer the photo-alignment film to functional films A and B (holding the liquid crystal facing each other), and then form a sealant so that the photo-alignment directions of the films are perpendicular to each other. Fill the liquid crystal by the method 1 or 2 and cut it into a panel shape after sealing, or cut it into a panel shape after pasting together with a sealing material, and then fill in the liquid crystal and seal You may do it.
- the photo-alignment direction is not necessarily orthogonal depending on the characteristics of the liquid crystal and the configuration of the liquid crystal panel.
- the alignment film there are a case where a photo-alignment film is used and a case where an alignment film is provided with orientation by rubbing the surface of the film coated with a liquid crystal alignment agent. at first. A photo-alignment film and then a method for imparting orientation by rubbing treatment will be described.
- a photo-alignment material containing a dichroic dye having a polymerizable group is used as the photo-alignment film material.
- the dichroic dye is a derivative of an azo dye having a polymerizable group or an anthraquinone dye having a polymerizable group.
- derivatives of azo dyes having a polymerizable group have the formula (4) [0290] [Chemical 11]
- each R 1 independently represents a group selected from the group consisting of a hydrogen atom, a halogen atom, a carboxyl group, a halogenated methyl group, a halogenated methoxy group, a cyano group and a hydroxyl group.
- M represents a hydrogen atom.
- R 2 may have a linking chain
- derivatives of anthraquinone dyes having a polymerizable group have the formula (5)
- R and R are each independently a polymerizable group that may have a linking chain, and the other R 3 is a hydrogen atom, a halogen atom, a hydroxyl group, a nitro group, or a sulfonic acid group. , Sulfonate group, methyl halide group, cyano group, amino group, formyl group, carboxyl group, piperidino group, and general formula (6) [0293] [Chemical 13]
- the polymerizable group of the photo-alignment material containing the dichroic dye is at least one group selected from a group force including a (meth) atalyloyl group, a (meth) acrylamide group, a bull group, and a bull ether group. It may be.
- One of the above photo-alignment films is coated on a substrate, irradiated with polarized light to give liquid crystal alignment ability, and light having a wavelength different from that for heating or liquid crystal alignment ability.
- a photo-alignment film is produced by polymerizing a polymerizable group by irradiating.
- FIG. 6 (a) A method for producing a photo-alignment film in the present embodiment will be described with reference to the drawings.
- the support film 150 is fed from the feed roll to the take-up roll, and the solution of the photo-alignment material is placed on the support film 150 until the support film 150 is taken up by the take-up port.
- the photo-alignment operation is an operation for imparting liquid crystal alignment ability by irradiating light, and the wavelength of light is selected such that the dichroic dye derivative efficiently photoreacts, and includes visible light, ultraviolet light, and the like.
- UV power is especially preferred for wavelengths around 300-400nm! / ⁇ .
- the film thickness is preferably ⁇ , preferably 0.00 ⁇ m—1 ⁇ m, more preferably 0.005 ⁇ —0.
- examples of polarized light used for photo-alignment include linearly polarized light and elliptically polarized light.
- Linearly polarized light obtained by obtaining light from an ultraviolet light source 152 such as a senon lamp, a high pressure mercury lamp, or a metal halide lamp through a polarizing filter 153 or a polarizing prism such as Glan Thompson or Grant Taylor is preferable.
- an ultraviolet light source 152 such as a senon lamp, a high pressure mercury lamp, or a metal halide lamp
- a polarizing filter 153 or a polarizing prism such as Glan Thompson or Grant Taylor is preferable.
- a method of irradiating polarized light to the substrate from an oblique direction or a method of irradiating non-polarized light from an oblique direction after irradiating polarized light may be used.
- the polymerization operation A follows the photo-alignment operation. Generally, it is performed by irradiation with light such as ultraviolet rays or heating. For these polymerizations, a polymerization initiator can be used as necessary. When the polymerization operation is carried out by light irradiation, in order not to disturb the alignment state of the already obtained photo-alignment material, the difference causing the photo-alignment by these dichroic dye molecules.
- the photo-alignment material is applied as described above and the substrate subjected to the photo-alignment operation is heated.
- the heating temperature is preferably 100 ° C or more and 300 ° C or less, more preferably 100 ° C or more and 200 ° C or less, in which the alignment state by the photo-alignment operation does not change.
- photopolymerization initiator it is preferable to use a photopolymerization initiator as the polymerization initiator.
- a photopolymerization initiator any known and commonly used photopolymerization initiator can be used without any particular limitation.
- photopolymerization initiators examples include 2-hydroxy-2-methyl-1-phenylpropane-1one (Merck's “Darocur 1173”), 1-hydroxycyclohexylphenol ketone (manufactured by Ciba Geigy Co., Ltd.) “Irgacure 184”), 1 (4 isopropyl phenol) —2-hydroxy 2 methylpropane 1-one (Merck “Darocur 1116”), 2-methyl-1 — [(methylthio) phenol] — 2— Morifolinopropane 1 (Chinoku "Gircure 9 07" manufactured by Gaigi Co., Ltd.), benzyldimethyl ketal (“Irgacure 651” manufactured by Chinoku Gaigi Co., Ltd.), 2, 4-Jetylthioxanthone (Nippon Kayaku Co., Ltd.) "Cacure DETX”) and p-dimethylamino repose Mixture with ethyl perfate (“
- thermal polymerization initiator it is preferable to use a thermal polymerization initiator as the polymerization initiator.
- a thermal polymerization initiator any known and commonly used thermal polymerization initiator can be used without any particular limitation.
- Thermal polymerization initiators include, for example, benzoyl peroxide, 2,4-dichlorobenzoic peroxide, 1,1-di (tertiary butyl peroxide) —3, 3, 5-trimethylcyclohexane. Hexane, ⁇ -Butyl-4,4'-di (tertiary butyl valyl) valerate, peroxides such as dicumyl peroxide; 7-azobisisobutyl nitrile, azo compounds; tetra And methyl thiuram disulfide.
- the above description is a method for forming an alignment film on a support film.
- a film for forming an alignment film for example, a transistor layer on a transistor layer formed on a base film.
- the alignment film may be formed by the above method.
- the alignment film formed on the support film is transferred onto the transistor layer of the base film 154 on which the transistor layer 155 is formed.
- the surface of the alignment film that is in contact with the support film is transferred in a state where it is in contact with the transistor layer 155, but the other surface of the alignment film can be transferred to the transistor 735.
- it is better to transfer by the method of FIG. In the method of transferring from the indicator film, the temperature during the alignment treatment is not directly applied to the base film or the organic material that becomes the light emitting layer of the organic EL, so that the base film and the organic material are not deteriorated. There is.
- the liquid crystal aligning agent is applied on the support film by a method such as a roll coater method, a spinner method, a printing method, or an ink jet method.
- the coated surface is formed by heating the coated surface.
- a functional silane-containing compound, a functional titanium-containing compound, or the like can be applied to the surface in advance.
- the heating temperature after applying the liquid crystal aligning agent is the temperature below the heat resistance temperature of the support film.
- the film thickness of the coating film to be formed is preferably 0.001 ⁇ m- ⁇ ⁇ m, more preferably 0.
- the formed coating film surface is rubbed in a certain direction with a roll to which a cloth having fiber strength such as nylon, rayon, or cotton is attached. Thereby, the alignment ability of the liquid crystal molecules is imparted to the coating film to form a liquid crystal alignment film.
- liquid crystal aligning agent of the present invention for example, those containing polyamic acid or Z and polyimide can be used, but are not limited thereto.
- a photocurable resin composition containing a urethane (meth) acrylate oligomer having two or more urethane bonds and unsaturated bonds in one molecule, a maleimide derivative, and a silane coupling agent are preferably used. Since this sealant uses a maleimide derivative and a specific compound, it can be polymerized by ultraviolet rays without using a photopolymerization initiator, and can be used as a sealant for liquid crystal panels for long-term stability and VHR ( Vapor hazard ratio: Vapor pressure specific to each substance Calculated as the value obtained by dividing the saturated concentration in air calculated by the allowable exposure limit concentration (OEL, etc.) This is a sanitary and safety standard.
- VHR Vapor hazard ratio: Vapor pressure specific to each substance Calculated as the value obtained by dividing the saturated concentration in air calculated by the allowable exposure limit concentration (OEL, etc.
- a backlight using a condensing film which is an eighth embodiment of the present invention, will be described in detail.
- FIG. 30 shows an embodiment of a backlight using the light collecting film of the present invention.
- This backlight is composed of a light guide 701 provided with a light source 705 on the end face side, and a condensing film force that controls the distribution of the emission angles of light emitted from the light source 705.
- the light collecting film is disposed on the light guide 701, and light incident on the incident surface is emitted from the output surface.
- the condensing film has flexibility with a radius of curvature S of 40mm or less, and a light diffusing function with a thermal expansion coefficient of 50ppmZ ° C or less.
- the light guide side tip of the light collector array 703 and the light exit surface of the light guide 701 are in close contact with each other.
- Each condensing body 703 has a flat surface in close contact with the light guide 701, and the light expansion. It is narrower than the area of the surface in contact with the film having a scattering function.
- the concentrator array may be a one-dimensional pattern or a two-dimensional pattern, but the elliptical shape as shown in FIG. Is preferable.
- the thermal expansion coefficient of the film having a light diffusion function in the present invention is required to be 50 ppmZ ° C or less.
- the coefficient of thermal expansion can be reduced by blending an inorganic filler, and the material described in the first embodiment to be described later can be used as the material of the film having the light diffusion function.
- Inorganic fillers need to be smaller than the wavelength of visible light in order to maintain the transparency of the film. If the particle size is 380 nm or less, the transmittance at the short wavelength end of visible light is impaired, but this is a particular problem in practice. Does not occur. More preferably, it is 1 lOOnm, and in this case, transparency is not impaired in the entire visible light region.
- a film having a light diffusing function is a film in which irregularities are formed on the surface of a resin film, a film in which two or more types of transparent resin are mixed in a phase-separated state to form irregularities at the interface, and light scattering particles And the like. In the case of a film with irregularities at the interface, it is not necessary to give the film light diffusibility.
- the light scattering particles are preferably transparent and made of a material having a refractive index different from that of the light diffusion film. Examples include resin beads, titanium oxide, zinc oxide, alumina, ITO, and silicon oxide. If the particle diameter of the light scattering particles is 0.5 m or more, the diffused light has wavelength dependency and is not colored. More preferably, it is 1. ⁇ ⁇ m or more. Furthermore, the particle size of the light scattering particles is 1Z2 or less of the film thickness of the light diffusion functional thin film. If it is present, it is more preferably 1Z4 or less that does not affect the light diffusion function. Titanium oxide, zinc oxide, ITO, alumina, or silica is preferred for a coefficient of thermal expansion of 50 ppmZ ° C or less.
- the content of the filler is preferably 0.1 to 90% by weight, more preferably 0.5 to 90% by weight.
- a light diffusion function of 0.1% by weight or more is sufficient, and if it is 90% by weight or less, it is not brittle and easily broken.
- zinc oxide, soot, silica, or the like which is an inorganic substance, is used as the filler, if it is 5% by weight or more, the effect of lowering the thermal expansion coefficient is obtained, and 10% by weight or more is more preferable.
- an organic EL element serving as a knock light source of a liquid crystal panel will be described below.
- the organic EL element has an organic layer including a light emitting layer having an organic light emitting material force interposed between an anode and a cathode arranged opposite to each other.
- an organic EL element uses an opaque metal electrode with one electrode being a transparent electrode and the other electrode being a back electrode!
- An organic EL element is formed by sequentially forming a transparent electrode with high transmittance on a substrate, an organic layer including a light emitting layer made of an organic light emitting material, and a back electrode that does not transmit light, and light emitted from the light emitting layer is formed on the substrate.
- a bottom emission type that transmits light, a back electrode on the substrate, an organic layer that includes a light emitting layer made of an organic light emitting material, and a transparent electrode are formed in this order, and light emitted from the light emitting layer is transmitted through the transparent electrode.
- planar light-emitting element in the present embodiment will be described with reference to the drawings.
- a specific example will be described using an organic EL element. It goes without saying that an inorganic EL element may be used as long as the element structure can be made thin even if it is not an organic EL element.
- a light-emitting element composed of organic EL includes an anode 122 made of transparent ITO (Indium Tin Oxide) and its anode 122. It is composed of an organic EL layer 121 laminated thereon and a cathode layer 123 having a work function smaller than that of the anode layer 122.
- Anode layer 122 is made of nickel, gold, platinum, palladium, alloys thereof, metals having a high work function such as tin oxide (Sn 2 O 3), copper iodide, alloys, compounds, or polypyrrole.
- a conductive polymer such as a steel can be used, and in general, a transparent electrode having an ITO force is often used.
- the cathode layer 123 is made of a metal material having a low work function (low work function metal material) that can improve the electron injection efficiency, preferably using a material having excellent electron injection properties. Generally, alloys such as aluminum, magnesium silver, and aluminum lithium are used.
- the organic EL layer 112 has, for example, a two-layer structure in which a positive hole transport layer 124 and an organic light emitting layer 125 are laminated in order on the anode layer 122 side force.
- N, N'-diphenyl Nlu, N, N, -bis (3 methylphenol) 1, 1, -biphenyl 4, 4, diamine hereinafter abbreviated as TPD
- TPD diamine
- Tris (8-hydroxyquinolinato) Aluminum, Alq or the like is used.
- the organic EL layer 112 has, in a three-layer configuration, a hole transport layer that is in contact with the anode electrode (anode) and efficiently transports holes, and a light emitting layer that includes a light emitting material.
- the hole and electron transport properties are improved by using a three-layer structure consisting of three layers of an electron transport layer that efficiently transports electrons in contact with the cathode electrode (cathode).
- a lithium fluoride layer, an inorganic metal salt layer, a layer containing them, or the like may be arranged at an arbitrary position.
- Light is emitted from the light-emitting layer 125 from the anode side, which is a transparent electrode.
- FIG. 7 (b) shows a schematic structure of an organic EL element which is another backlight source of the present embodiment.
- an aluminum lOOnm film serving as a cathode is formed by a normal sputtering method.
- the light emitting layer 125 to be the organic EL layer 112 and the hole transport layer 124 are formed in this order by a coating method so that the respective thickness forces are SlOOnm, and then the ITO film to be the anode 122 is sputtered. so The film is formed with a thickness of lOOnm.
- light emitted from the organic EL layer 112 (emitted light B) is emitted from the anode side.
- FIG. 7 (c) shows a modification of the backlight light source, in which an organic EL element is laminated in the order of an anode 122, a hole transport layer 124, a light emitting layer 125, and a cathode 3.
- the manufacturing method of the organic EL layer and the thickness of each film are the same as in FIG.
- the electrode in contact with the hole transport layer 124 is an ITO film 127, and an electrode having a transparent ITO force and an aluminum film having the function of the reflection film 126 are used. It has a laminated structure.
- the aluminum film can be deposited to a thickness of 1 OOnm by sputtering, just like the cathode in Fig. 7 (b).
- a transparent electrode film such as an ITO film may be formed after forming an aluminum film with a thickness of lnm-lOnm.
- aluminum was deposited with a thickness of 5 nm and an ITO film with a thickness of 95 nm. If the film thickness of aluminum is 1 nm or more, the electron injection property is not impaired, and if it is less than lOnm, the transparency is not impaired.
- light emission from the light emitting layer needs to be white (for example, daylight standard light source D65 (color temperature 6500K)). Since there is no material that emits white light alone, a plurality of colored light is emitted by a plurality of light emitting materials, and white is emitted by mixing colors. As the combination of multiple colored lights, the three primary colors of red, green, and blue may be emitted, or the relationship of complementary colors such as blue and yellow, blue green and orange may be used. The light emission must match the spectral transmittance.
- a color filter using three color filters of red, green, and blue is used, at least emission of a wavelength that passes through the red filter and transmission through the green filter are required to display a brilliant display. If there is light emission of a wavelength and light emission of a wavelength that passes through a blue filter. If the spectral transmittance of the red filter and the green filter is continuous at the wavelength between them, it does not matter if the red filter and the green filter do not transmit both wavelengths and do not emit the wavelength. Absent. Furthermore, the light emission maximum value is between green and blue, and blue In the case of emission of wavelengths that pass through both the color filter and the green filter, it is not necessary to emit each of the blue and green colors independently.
- the organic EL element since the light emitting portion is an organic compound, it is necessary to protect the light emitting portion from the external atmosphere (moisture, oxygen, etc.).
- the light emitting portion is an organic compound, it is necessary to protect the light emitting portion from the external atmosphere (moisture, oxygen, etc.).
- the external atmosphere moisture, oxygen, etc.
- the organic EL layer 112 is formed by vapor deposition, it is preferable to form a protective film by sputtering in the same vacuum chamber. In this case, it is preferable to continuously form the organic EL layer 112, the positive electrode 122 made of transparent ITO, and the protective film. SiO, SiN, Al O or A1N
- An organic EL device can be protected if it has a protective film that is more than lOOnm. There is no upper limit on the thickness, but if it is 1 ⁇ m or less, there is no problem in manufacturing.
- the protective film is covered with the end surface of the organic EL layer 112, which is the light emitting layer of the thin film light emitting device, and the transparent electrode 111, and the upper surface of the organic EL layer 112 is covered. It is preferable to cover it.
- a base film will be described as a first embodiment of the present invention.
- the base film which is a supporting substrate for forming a liquid crystal display panel, is thin and highly heat resistant, especially transparent to the light in the visible light region and optically isotropic, that is, a phase difference (light delay). It is required to be a plastic material.
- a thin display device such as an electronic book
- it can be used like a conventional paperback such as a paperback book, so that it can be used without a sense of incongruity.
- the impact resistance is high and the resistance to dropping is strong.
- the conventional glass substrate has different impact resistance depending on the location where the impact is applied due to the characteristics of the material. There is a drawback that it breaks easily.
- the impact resistance is improved compared to glass, but when an impact is applied to the edge, the impact is directly applied to the support substrate and the transistors and wiring mounted on the support substrate. The point is the same as the glass substrate.
- the thickness is no upper limit on the thickness as long as it is used only in the roll '1' roll process, but it is thinner than 400 m of the glass substrate in consideration of the reduction in size and weight of the entire display device. It is preferable that the thickness is less than 200 m of the plastic substrate. In order to satisfy the requirements for the small size and light weight of the entire display device, 10 to 150 m is preferable, and 10 ⁇ m to 100 ⁇ m is more preferable. Also, if it is 10 ⁇ m or more, wrinkles or cracks may occur during transportation.
- the mechanical and optical change is not more than 5% for a temperature history of at least 200 ° C, more preferably for a temperature history of 250 ° C. More preferably, the optical change is 5% or less.
- Optical changes indicate deterioration of light transmittance and increase in phase difference depending on temperature, and mechanical deformations indicate deterioration of flexibility and change in dimensions.
- the visible light (380 nm-800 nm) region is required. At least 450 nm to 700 nm, more preferably 400 to 700 nm, and most preferably high transmittance in the visible light region of 380 nm to 800 nm! If the transparency is high at 450-700 nm, it is practically acceptable. 400 nm- 700 nm is more preferable even if the most exacting color tone is required. More preferable is the visible light region. It is desirable that the light transmittance is high in the entire range of 380 nm to 800 nm. The wider the transparent wavelength region, the more the image display device that can reproduce the color close to the original color can be manufactured.
- the light transmittance (wavelength, 550nm) should be 80% or more for the desired base film thickness. In particular, there is no problem, but 85% or more is preferable, and 90% or more is more preferable.
- acrylic resin or cyclic olefin resin it is preferable to use acrylic resin or cyclic olefin resin.
- a bifunctional or more preferably trifunctional or higher allylic compound or methacrylic compound for the acrylic resin For example, bisphenol A diatalylate, bisphenol S diatalylate, dicyclopentadi-rudiatalylate, pentaerythritol tritalylate, tris (2-hydroxyethyl) isocyanurate triatalylate, pentaerythritol tetra Atalylate, bisphenol A dimetatalylate, bisphenol S dimethacrylate, dicyclopentagel didimethatalylate, pentaerythritol trimetatalylate, tris (2-hydroxyethyl) isocyanurate trimetatalylate, pentaerythritol tetrametatali Rates, etc. It is also possible to use a mixture of two or more compounds.
- Cyclic olefin resins are adducts (co) polymers of cyclic olefinic compounds, addition copolymers of ethylene and cyclic olefinic compounds, and hydrogens of ring-opening (co) polymers of cyclic olefinic compounds. Examples are chemicals.
- the hydrogenated product can be obtained by hydrogenating a ring-opening (co) polymer of cyclic olefin in the presence of a hydrogenated calo catalyst.
- hepta-5-ene 2 strength rubonic acid (3-ethyl 3-oxeta -L) Methyl-5-triethoxysilyl-bicyclo [2. 2. 1] hepta-2-en, 5-methyldimethoxysilyl-bicyclo [2. 2.
- hepter 2-en 5- [1, —Methyl-2,5, —Dioxa-1′-silacyclopentyl] -bicyclo [2.2.1] hepta-2-en, 5— [—Methyl-3, 3, 3, 4, 4, 4-tetrahue -Lu 2,5, -Dioxa-1,1-silacyclopentyl] —bicyclo [2.2.1] hepta-2-en, 5— [1,4,4, -trimethyl-2,6 Dioxa-1, 1, silacyclohexyl] -bicyclo [2. 2. 1] hepter 2-ene can be used.
- the base film is required to have a small dimensional change during the process of manufacturing a display, and the thermal expansion coefficient is preferably 50 ppmZ ° C or less.
- Plastic materials can have a low coefficient of thermal expansion by incorporating an inorganic filler.
- Inorganic fillers need to be smaller than the wavelength of visible light in order to maintain the transparency of the film, and if the particle size is 380 nm or less, the transmittance at the short wavelength end of visible light is impaired, but practically particularly. Does not cause a problem. More preferably, it is 1 lOOnm, and in this case, transparency is not impaired in the entire visible light region. There is no problem even if it is less than lnm, but it is difficult to produce a filler less than lnm with the current technology.
- Examples of the inorganic filler include titanium oxide, zinc oxide, alumina, and oxygenate.
- Examples of the method of blending the inorganic filler include a method of dispersing dry powdered silicon oxide fine particles using a mixing device having a high dispersion capacity, Method of removing organic solvent by mixing dispersed colloid (sol) and other compound and reducing pressure while stirring if necessary, colloid (sol) dispersed in organic solvent and other compound And then, after removing the solvent as necessary, casting and further removing the solvent.
- a bead mill etc. are mentioned as an apparatus with high dispersion capability.
- a melt extrusion method or a solution casting method can be used.
- acrylic resin can be cast into a solvent-free liquid monomer, cured by irradiation with heat or active energy rays, and processed into a film.
- Cyclic resins containing acryl groups and methallyl groups in the side chain substituents of monomer units in cyclic olefin-based resins are irradiated with heat and active energy rays, and those containing oxetal groups generate acid.
- the resin containing hydrolyzable silyl groups can be made into a cured film by hydrolysis with liquid or gaseous heated water and condensation using an acid generator or tin compound as a catalyst. Monkey.
- the active energy ray used for curing is preferably ultraviolet rays.
- the lamp that generates ultraviolet rays include a metal halide type and a high-pressure mercury lamp.
- the photopolymerization initiator used in this case include benzophenone, benzoin methyl ether, benzoin propyl ether, diethoxyacetophenone, 1-hydroxyne chloro roof enyl ketone, and 2,6-dimethylbenzoyl diphenyl.
- the content of the photopolymerization initiator is preferably 0.01-2 parts by weight with respect to 100 parts by weight of the organic component containing a (meth) acryl group. If the amount is too small, the sensitivity may be poor and curing may be insufficient. If the amount is too large, the sensitivity may be too high, and a curing reaction may occur during compounding, resulting in poor coating.
- thermal polymerization initiator When performing thermal polymerization by applying heat, a thermal polymerization initiator can be contained as required.
- thermal polymerization initiators used in this case include benzoyl peroxide, diisopropyl peroxy carbonate, and t-butyl peroxy (2-ethylhexanoate). The amount used is 0.0% with respect to 100 parts by weight of the organic component containing the (meth) acrylic group.
- the base film of this example preferably has excellent transparency, that is, high light transmittance, and is optically isotropic, that is, has a small phase difference.
- the light transmittance is 85% or more, more preferably 90% or more at a wavelength of 550 nm.
- the phase difference preferably has a value in the normal direction of lOnm or less, more preferably 5 nm or less.
- the base film in the present invention preferably has a thickness of 10 to 300 ⁇ m. If it is less than 10 ⁇ m, wrinkles, cracks, and scuffing will occur during conveyance, and if it exceeds 300 / z m, processing with a roll 'two' roll tends to be difficult.
- Acrylic resin-type base film consists of 120 parts by weight of dicyclopentagel-didiatalate, isopropyl alcohol-dispersed colloidal acid silicate key [30% by weight of oxide oxide, average particle size 10-20 nm ] 400 parts by weight was mixed, and 200 parts by weight of the volatile component under reduced pressure was removed while stirring at 45 ° C. Then, add 0.6 parts by weight of 1-hydroxyne chloro roof elu ketone ("Irgacure 184" manufactured by Ciba Specialty Chemicals) as a photopolymerization initiator and dissolve it to obtain a resin composition for base film. Obtained.
- Irgacure 184" 1-hydroxyne chloro roof elu ketone
- the resin film composition for base film was cured to a film thickness of 100
- PET / polyethylene terephthalate (PE) film was coated with a die coater so as to be / z m. Subsequently, the volatile components were volatilized in a drying oven controlled at 120 ° C and cured with an ultraviolet irradiation device. After curing, the PET film was peeled off by release treatment to obtain a base film.
- PE polyethylene terephthalate
- hepta-2-ene addition copolymer 100 parts by weight, tributyl phosphite 1.5 parts by weight, pentaerythrityl-tetrakis [3— (3, 5--t) as an antioxidant -Butyl-4-hydroxyphenyl) propionate] and tris (2,4-diethylbutylbutyl) phosphite were dissolved in 0.5 parts by weight and 550 parts by weight of xylene, respectively, to obtain a resin composition for a base film. .
- a die is formed on a PET (polyethylene terephthalate) film.
- the film was coated with a coater and dried primarily at a temperature of 30 ° C-50 ° C to obtain a film containing 20-50 parts by weight of solvent.
- the film is peeled off from the PET film and exposed to a 30 ° C toluene vapor atmosphere, followed by secondary drying at 50–200 ° C, followed by a 170 ° C heated water vapor atmosphere.
- a base film having a cured film thickness of 100 m was obtained.
- the acrylic resin-type base film had a light transmittance of 90% (550 nm, thickness 100 ⁇ m), a retardation of 3 nm, and a Young's modulus of 5.3 GPa.
- the cyclic olefin fin type base film had a light transmittance of 91% (550 nm, thickness 100 ⁇ m), a phase difference of 5 nm, and a Young's modulus of 2.9 GPa.
- Both the acrylic resin type and the cyclic olefin resin type could be rolled into a roll with a radius of 30 mm.
- the base film is a thin film made of an organic resin
- normal air components such as oxygen and water vapor enter the liquid crystal layer and the organic EL layer.
- the gas barrier layer must also be transparent in that the substrate needs to transmit light. For this reason, as the material of the gas nolia layer, organic materials such as polybulal alcohol, organic materials and clay minerals (Al 2 O 3)
- Amorphous clay minerals such as Al O-SiO-2-3H O and crystalline clay minerals (Si, Al)
- Organic-inorganic composites with inorganic materials such as O tetrahedral sheet, (Al, Mg) (O, OH) octahedral sheet)
- the material examples include a thin film of an inorganic material such as an acid silicate or an acid aluminum.
- the film thickness can be reduced by using an inorganic material because it is excellent in gas noliativity in a high humidity environment and is effective even when the thickness is small. Furthermore, two or more of these layers are stacked to form a film.
- the thickness of the gas barrier layer is 10 ⁇ m for organic materials and organic-inorganic composite materials.
- an inorganic material it is preferably lOnm—: m.
- the thickness is 1 ⁇ m or more, it is possible to sufficiently prevent normal air components such as oxygen and water vapor from entering the liquid crystal layer and the organic EL layer. If it is less than 10 m, it will not affect the physical properties of the base film such as expansion coefficient.
- it if it is lOnm or more, normal air components such as oxygen and water vapor can be sufficiently prevented from entering the liquid crystal layer and the organic EL layer. If it is 1 ⁇ m or less, there will be no damage IJ during bending.
- a coating method can be used in the case of an organic material and an organic-inorganic composite material, and various thin film deposition methods can be used in the case of an inorganic material.
- a liquid organic material or a liquid such as a solution thereof is applied on a film, and dried or cured to form a film.
- Thin film deposition methods include physical vapor deposition methods such as vacuum deposition, ion plating and sputtering, and chemical vapor deposition methods such as plasma CVD in vacuum, catalytic CVD, and CVD under atmospheric pressure. .
- sputtering is particularly preferable because a dense film can be obtained at a low temperature.
- a roll of base film 3 having a thickness of 100 ⁇ m, a width of 30 cm, and a length of 100 m was set on the unwinding roll 2 side of the magnetron sputter roll coater shown in FIG.
- Reactive sputtering film formation with pulsed DC power source using 0.3Pa, temperature control drum temperature 30 ° C, argon as discharge gas, oxygen as reaction gas, and silicon doped with boron as target went.
- a gas oxide layer with a thickness of lOOnm SiO: x is 1.6-1.9
- the gas barrier layer may be formed only on one side of the base film.
- the gas barrier may be formed again on the other side by the same method, or the target 5 shown in FIG. 8 is provided also on the back side, and the gas barrier film is formed on both sides of the base film once. It is okay to form a film.
- FIGS. 9 and 10 are diagrams showing a manufacturing process in which a thin film transistor is transferred to a base film with a glass substrate force.
- an oxide film or a nitride film 202 such as a nitride film is formed on the glass substrate 201 as a hydrofluoric acid etching prevention layer.
- An amorphous silicon film or a polycrystalline silicon film is formed thereon.
- an amorphous silicon film 216a was formed at lOOnm.
- a plasma CDV method or a sputtering method can be used. Thereafter, as shown in FIG.
- the amorphous silicon film is modified to a polycrystalline silicon film 216b by irradiating laser light C with an excimer laser.
- a method for modifying the polycrystalline silicon film a solid phase growth method using thermal annealing may be used instead of laser light irradiation.
- a gate insulating film 217 made of an oxide film is formed by lOOnm by plasma CVD or sputtering.
- the region where the n-channel transistor is to be formed is covered with a photoresist, and boron is implanted by ion doping to form a p-type region. Form Fa.
- FIG. 9 (c) After patterning the polycrystalline silicon film 216b into a desired shape, a gate insulating film 217 made of an oxide film is formed by lOOnm by plasma CVD or sputtering.
- FIG. 9 (d) after forming the gate electrode 218, the region where the n-channel transistor is to be formed is covered with a photoresist, and boron is implanted by ion doping to form a p-type region. Form Fa.
- FIG. 9 (c) After patterning the polycrystalline silicon film 216b into a desired shape, a gate insulating film 217 made of an oxide film is formed by lOO
- the region for forming the p-channel transistor is covered with a photoresist 219, and phosphorus is implanted E by ion doping to form an n-type region Fb.
- a source electrode / drain electrode made of aluminum an interlayer insulating film 220 having a thickness of 200 nm made of an oxide film and a metal electrode 221 made of aluminum are formed. This completes the transistor.
- the pixel driving transistor section that drives the pixels of the liquid crystal panel may be composed only of n-MOS or p-MOS transistors. A desired circuit can be formed on a glass substrate by arbitrarily arranging such transistor arrays.
- a transparent conductive film such as ITO is further formed in a region to be an image display portion to form a desired pixel electrode.
- an oxide film having a thickness of 200 nm is formed as an electrode protective film for protecting the electrode.
- a protective film 230 is attached to the transistor formation surface of the glass substrate 201 on which the transistor array 229 is formed, using an adhesive.
- the substrate with the protective film is immersed in a glass etching solution 231 that also has hydrofluoric acid power, and the glass substrate 228 is also etched G by back surface side force. Etching is stopped at the NOR layer 234 after etching the glass substrate 228.
- a base film 235 is attached to the etched surface as shown in FIG. 10 (c).
- the protective film 230 and the adhesive are peeled off from the transistor array layer 229, whereby the transfer is completed and the element layer is formed on the base film.
- the etching film 202 in FIG. 9 (a) has a slow etching rate with respect to the glass etching solution, it functions as an etching stopper layer, and the glass substrate etching process in FIG. 10 (b) is performed with good controllability. Can do.
- the protective film 230 a material that can withstand strong acid such as hydrofluoric acid is required. Also, during etching, it is necessary to prevent the temperature of the etching solution from changing so that etching proceeds uniformly.
- a TFT film substrate for a liquid crystal display panel can be produced by the manufacturing process as described above.
- a glass substrate is used for the support substrate, an etching solution such as hydrofluoric acid is used for removing the support substrate, a nitride film is used for the noor layer, and an adhesive is used for the protective film.
- this can also be realized by using a quartz substrate or silicon substrate as the substrate and removing the support substrate by a polishing method or using a hot melt sheet or the like that is bonded by heat.
- the base film described in detail in Example 1 is a film that becomes a substrate constituting the panel when the liquid crystal panel is formed.
- a base film may be used as the support film for the functional film produced in the intermediate process, but it is not necessarily a base film.
- Materials that can be used for the support film include polyester, polyethylene, polypropylene, polyethylene terephthalate, polybutyl alcohol, epoxy, polyimide, polyamide, polystyrene, polycarbonate, polypropylene, etc. in addition to the material used for the base film.
- Polyhalogenated burs such as polyolefin, polychlorinated butyl, poly vinylidene chloride, ethylene bur copolymer, butyl acetate or cellulose resin such as cellulose acetate, nitrocellulose and cellophane may be used. it can.
- the cover film can be made of the same material as the support film. Function It goes without saying that the material is appropriately changed depending on the conditions at the time of manufacturing the thin film, for example, light transmittance 'temperature conditions at the time of manufacturing.
- Both the cover film and the support film preferably have a coefficient of thermal expansion of 50 ppmZ ° C or less, and a difference in coefficient of thermal expansion of the base film is ⁇ 30% or less. More preferably, it is preferably 15% or less. Since the functional thin film formed on the support film is transferred onto the functional thin film formed on the base film, it is necessary to match the thermal expansion coefficient of the support film with that of the base film.
- the particle size of the inorganic filler mixed in the resin is set to lnm-200nm, more preferably lnm-150nm.
- the lower limit is not limited to lnm, but may be less than lnm as long as it can be manufactured.
- a retardation film will be described as a third embodiment of the present invention.
- the retardation film includes a coating type retardation film and a bonding type retardation film. First, the coating type retardation film will be described.
- Polyimide aligning agent "AL-1254" (manufactured by JSR) is applied as an alignment film to a roll-like base film with polyethersulfone that has been treated with silicon oxide on the surface. And dried for 1 hour, and this was rubbed with a rayon cloth.
- a coating film of alkyl chain-modified POVAL (for example, MP203 manufactured by Kuraray Co., Ltd., R1130, etc.) can impart the orientation ability only by rubbing as much as necessary.
- most organic polymer films that form a hydrophobic surface such as polyvinyl butyral and polymethylmetatalylate, can impart liquid crystal alignment capability by rubbing the surface.
- the diacid / silicon oxide alignment film can be formed in the same manner as in the second embodiment. It should be noted here that the film is formed using an oblique vapor deposition method.
- a polymerizable liquid crystal composition (A) was prepared.
- the resulting composition exhibited a nematic phase at room temperature, and the nematic phase force and the transition temperature to the isotropic phase were 47 ° C.
- n (abnormal light refractive index) at 25 ° C was 1.65
- Polymerizable liquid crystal yarn composition (A) 100 parts by weight and photopolymerization initiator “IRG-651” (manufactured by Ciba Gaigi Co., Ltd.) 1 part by weight
- the polymerizable liquid crystal composition (c) is dissolved in methyl ethyl ketone, applied to the previously obtained roll-shaped base film with a gravure coater, and then irradiated with an ultraviolet ray of 365 nm at room temperature for 160 mjZcm 2.
- the polymerizable liquid crystal composition was cured to form a retardation film having a thickness of 1. It was confirmed that this retardation film has a retardation of 138 nm with respect to light having a wavelength of 550 nm and functions as a 1Z4 wavelength plate.
- NMP N-methyl-2-pyrrolidone
- 2- Kuroruparafue be equivalent to 85 mole 0/0 as an aromatic Jiamin components - and Renjiamin
- 4 corresponds to 15 mole 0/0
- 2-chloroterephthalic acid dichloride corresponding to 99 mol% was added thereto and stirred for 2 hours to complete the polymerization.
- This solution was neutralized with lithium hydroxide to obtain an aromatic polyamide solution having a polymer concentration of 10% by weight.
- the polymer solution was cast on an endless belt, dried with hot air at 150 ° C until self-supporting property was obtained, and then peeled from the belt.
- the film peeled from the belt was subsequently stretched 1.10 times in the longitudinal direction of the film in a 40 ° C. water bath, and the remaining solvent and inorganic salts were removed and introduced into the tenter.
- the tenter it was dried and heat-treated with hot air at 280 ° C.
- the aromatic polyamide film having a thickness of 4.0 m was obtained by stretching 1.5 times in the width direction in the tenter.
- the slow axis of this film coincides with the width direction, the dimensional change rate in that direction is 0.02%, the dimensional change rate in the orthogonal direction is 0.0%, and the longitudinal direction (MD)
- the Young's modulus in the width direction (TD) was 10 GPa and 16 GPa, respectively, and had extremely high heat resistance and tensile strength.
- the minimum value of the light transmittance at 450 to 700 nm of this film was 80%, and the light transmittance at 400 ⁇ m was 24%.
- the polymer solution was cast on a belt, and then the film having self-supporting property was peeled off by the belt. This film is brought into contact with a roll heated to 100 ° C, and 1. The roll-to-roll stretching was performed 8 times.
- the film stretched in the MD direction was introduced into a 40 ° C. water bath to remove the remaining solvent, inorganic salts, and the like, and then introduced into the tenter. In the tenter, drying and heat treatment were performed with 300 ° C hot air.
- the film was stretched by a factor of 2.2 in the width direction in a tenter to obtain an aromatic polyamide film having a thickness of 3.0 m.
- the slow axis of this film coincides with the longitudinal direction, the dimensional change rate in that direction is 0.04%, the dimensional change rate in the orthogonal direction is 0.0%, and the longitudinal direction (MD)
- the tang ratio in the width direction (TD) was 19 GPa and 9 GPa, respectively, which were extremely heat-resistant and tensile.
- the minimum value of the light transmittance at 450 to 700 nm of this film was 79%, and the light transmittance at 400 ⁇ m was 22%.
- the above retardation film is preferably laminated on a support film.
- the aromatic polyimide or polyamic acid solution of this example is obtained as follows. That is, the polyamic acid can be prepared by reacting a tetracarboxylic acid dihydrate and an aromatic diamine in an aprotic organic polar solvent such as N-methylpyrrolidone, dimethylacetamide, dimethylformamide or the like.
- An aromatic polyimide can be prepared by heating a solution containing the above polyamic acid or adding an imidizing agent such as pyridine to obtain a polyimide powder, which is dissolved again in a solvent.
- the polymer concentration in the stock solution is preferably about 5-40 wt%.
- a retardation film can be prepared using the above-mentioned stock solution.
- the resulting retardation film is
- Measurement diameter ⁇ 5mm Measurement wavelength: 400-800nm
- phase differences at wavelengths of 450 nm, 550 nm, and 650 nm were R (450), R (550), and R (650), respectively.
- the sample was placed on a universal stage and observed under a cross-col with a polarizing microscope, and the direction with the greatest birefringence was taken as the slow axis.
- the orientation meter for example, MOA-2001 A, manufactured by Kanzaki Paper Co., Ltd.
- MOA-2001 A manufactured by Kanzaki Paper Co., Ltd.
- T1 is the intensity of light that has passed through the sample
- TO is the intensity of light that has passed through the air at the same distance except that it has not passed through the sample.
- UV measuring instrument U-3410 manufactured by Hitachi Measuring Instruments
- Wavelength range 300nm—800nm
- the polarizing film used in this example is a polyvinyl alcohol, a partially formalized polybulal alcohol, a partially saponified polymer of an ethylene'-acetate copolymer, or the like.
- -It is obtained by adsorbing dichroic dyes such as iodine and z or dichroic dyes to a rualcohol-based film and biaxially stretching, followed by boric acid treatment.
- the thickness of the polarizing film is about 5-50 ⁇ m, but is not limited to this.
- H film polybutyral film in which a thin film of polyvinyl alcohol is stretched while heated and immersed in a solution containing a large amount of iodine (usually called H ink) to absorb iodine can be used.
- H ink a solution containing a large amount of iodine
- An 18 ⁇ m film could be obtained with the H film.
- a resin pellet containing iodine and Z or a dichroic dye is formed into a film by a method such as melt extrusion or solution casting, and then the film is uniaxially stretched to produce iodine and There is a polarizing film in which Z or dichroic dye is strongly uniaxially oriented.
- the thickness of the polarizing film is a force of about 1 10 / z m, but is not limited to this.
- the resin used here is a polyalcohol, partially formalized polybulal alcohol, a polyvinyl alcohol-based resin, a polyolefin resin, an acrylic resin, which can be used as a part of a polymer such as an ethylene 'vinyl acetate copolymer.
- polyester resins such as PET (polyethylene terephthalate) and PEN (polyethylene naphthalate), polyamide resins, polyamideimide resins, polyimide resins, polycarbonate resins, and polysulfone resins.
- the polarizing film is bonded to the support film by heat, pressure, pressure-sensitive adhesive, adhesive, or the like.
- the polarizing film is peeled off from the supporting film and bonded to the protective film of the organic EL light emitting element on the functional film, for example.
- the polarizing film When the polarizing film is formed on the release film as the supporting substrate, only the polarizing functional layer must be bonded to the protective film of the organic EL light emitting device, for example, on the functional film. For this reason, it is necessary that the polarizing film and the support film be bonded in a state where they can be peeled off. However, considering that another layer is further laminated on the surface from which the support film has been peeled, the support film is required to be laminated. It must be treated so that the release agent on the film does not migrate onto the polarizing film upon peeling.
- the polarizing film needs to be protected from moisture and ultraviolet rays.
- an optically transparent protective layer is bonded on one or both sides.
- a resin having excellent thermal stability and moisture shielding properties for the resin forming the protective layer.
- examples of such a resin include cellulose, polycarbonate, polyester, acrylic, polyethersulfone, polyamide, polyimide, and polyolefin. Of these, cellulose such as triacetyl cellulose, polyester such as polycarbonate and polyethylene terephthalate, acrylic, and the like are preferably used.
- LEDs Light-emitting diodes
- organic EL devices contain almost no ultraviolet rays in their light-emitting components.
- UV resistance is negligible.
- organic EL devices are used to protect the organic matter that is the light emitting layer of organic EL devices from moisture and oxygen.
- the polarizing film for the knock light is often arranged immediately above the protective film of the organic EL. In this case, the protective film on one side of the polarizing film can be omitted. For this reason, it is not necessary to provide a protective film on the polarizing film as in the prior art, so that the polarizing film can be made thin.
- a method of forming a protective film on the polarizing film there is a method in which the protective film of the polarizing film is directly bonded to the polarizing film, but the protective film of the polarizing film and the polarizing film are formed on different supporting substrates. After bonding, there is a method in which the protective film or polarizing film of the polarizing film is bonded to the polarizing film or the protective film of the polarizing film while peeling off the supporting substrate.
- a polarizing film is formed on the protective film of the organic EL element. It is preferable to match.
- the film thickness was 6 ⁇ m in total including the polarizing film (3 ⁇ m) and the protective film (3 ⁇ m).
- a protective film When a protective film is provided on one or both sides of the polarizing film, it is obtained by bonding an optically transparent protective layer.
- a resin having excellent thermal stability and moisture shielding properties for the resin forming the protective layer like this
- the resin include cellulose, polycarbonate, polyester, acrylic, polyether sulfone, polyamide, polyimide, and polyolefin.
- celluloses such as triacetyl cellulose, polyesters such as polycarbonate and polyethylene terephthalate, and acrylics are preferably used.
- These protective layers may contain an ultraviolet absorber such as a salicylic acid ester compound, a benzophenol compound, a benzotriazole compound, a cyanoacrylate compound, or a nickel complex salt compound.
- an ultraviolet absorber such as a salicylic acid ester compound, a benzophenol compound, a benzotriazole compound, a cyanoacrylate compound, or a nickel complex salt compound.
- a hard coat layer, an anti-reflection layer, an anti-glare layer, and the like may be formed on the surface of the protective layer by performing various surface treatments.
- the thickness of the protective layer is usually 80 m or less, preferably 40 m or less, from the viewpoints of thin film lightness, protective function, handleability, and resistance to cracking during cutting.
- An adhesive is used when the protective film and the polarizer are bonded together.
- the adhesive used here is not particularly limited as long as it adheres the protective film and the polarizer satisfactorily.
- the adhesive is applied to one or both sides of the polarizer using various methods such as wire bar, doctor blade, and dating, and then bonded to the protective layer.
- the adhesive layer is dried or cured using hot air, ultraviolet rays, infrared rays or the like in order to ensure the adhesive strength of the bonding. At this time, it is preferable to dry and cure the adhesive layer under the condition that the polarizing performance of the polarizer does not deteriorate.
- the polarizing film is provided with an adhesive layer in order to be laminated with members having various optical functions such as a liquid crystal cell and a retardation plate in the liquid crystal display panel.
- a pressure-sensitive adhesive based on an acrylic polymer, silicone-based polymer, polyester, polyurethane, polyether or the like can be used. Above all, like acrylic adhesives, it has excellent optical transparency, retains appropriate wettability and cohesion, has excellent adhesion to substrates, and has weather resistance and heat resistance. However, it is preferable to select and use a material that does not cause peeling problems such as floating or peeling under the condition of heating or humidification.
- alkyl esters of (meth) acrylic acid having an alkyl group having 20 or less carbon atoms such as methyl group, ethyl group and butyl group, (meth) acrylic acid and (methacrylic acid) (C) Acrylic monomer having a weight average molecular weight of 100,000 or more prepared by blending an acrylic monomer such as hydroxyethyl acrylate with a glass transition temperature of preferably 25 ° C or lower, more preferably 0 ° C or lower. Polymers are useful as the base polymer.
- the pressure-sensitive adhesive layer is formed on the polarizing film by, for example, dissolving or dispersing the adhesive composition in an organic solvent such as toluene or ethyl acetate to prepare a 10-40 wt% solution, which is then applied to the polarizing film.
- an organic solvent such as toluene or ethyl acetate
- Examples include a method of forming an adhesive layer by directly coating on the surface, and a method of forming an adhesive layer by previously forming an adhesive layer on a protective film and transferring it onto a polarizing film.
- the thickness of the pressure-sensitive adhesive layer is in the range of 1 ⁇ m-50 m, which is determined according to the adhesive strength.
- the adhesive layer may be filled with a filler or pigment made of glass fiber, glass bead, rosin bead, metal powder or other inorganic powder as necessary, a colorant or an antioxidant, and further salicylic acid.
- An ultraviolet absorber such as an ester compound, a benzophenol compound, a benzotriazole compound, a cyanoacrylate compound, or a nickel complex compound may be blended.
- the thickness of the polarizing film described above is 150 m or less, preferably 100 m or less, and has a protective layer on one side in the configuration having a protective layer on both sides (protective layer Z polarizer Z protective layer Z adhesive layer).
- the structure (protective layer Z polarizer Z adhesive layer) is 100 m or less, preferably 50 m or less.
- the polarizing film of the present invention when used in a reflective or transflective liquid crystal display panel, it can be used as a circularly polarizing film by being bonded to a retardation plate.
- the retardation plate a film made of polycarbonate, polybutyl alcohol, polystyrene, polymethyl methacrylate, polyolefin, polyarylate, polyamide or the like is uniaxially or biaxially stretched to control the in-plane refractive index. Furthermore, a film in which the refractive index in the thickness direction is controlled by shrinking the raw resin film under adhesion with a heat-shrinkable film, a discotic liquid crystal or a nematic liquid crystal alignment film, and the like.
- the retardation plate used here may be used in combination of two or more films for the purpose of improving contrast.
- a pressure-sensitive adhesive When integrating the polarizing film and the retardation plate, it is preferable to use a pressure-sensitive adhesive from the viewpoint of easy work and prevention of optical distortion. At this time, either one side of the polarizing film or retardation plate is used.
- the pressure-sensitive adhesive layer can be provided on both sides and subjected to an integration process.
- the pressure-sensitive adhesive layer to be provided may be an overlapping layer of different composition or type. Further, when an adhesive layer is provided on both sides, adhesive layers of different compositions or types may be used on the front and back of the polarizing film and the optical layer.
- the angle between the absorption axis of the polarizing film and the retardation axis of the retardation plate is within the range of 45 ° ⁇ 1 ° or 135 ° ⁇ 1 °. It is necessary to paste. If the bonding accuracy exceeds this range, the function as a circularly polarizing film becomes insufficient.
- the above-mentioned circular polarizing film uses a polarizing film having a protective layer only on one side, and a retardation plate is bonded to one side of the polarizer via an adhesive layer (protective layer Z polarizer Z It is desirable to use a pressure-sensitive adhesive layer Z-phase retardation plate (Z-pressure-sensitive adhesive layer) having a thickness of 150 m or less, preferably 100 ⁇ m or less.
- the polarizing film according to the present invention and the circular polarizing film using the polarizing film are preferably used for a liquid crystal display panel for a mopile application such as a notebook personal computer or a mobile phone, and an adhesive is applied to one or both sides of these liquid crystal cells. Laminated.
- the polarizing film or the circular polarizing film provided on both sides of the liquid crystal cell may be the same or different.
- the polarizing film or the circular polarizing film is cut in advance to the size of a liquid crystal cell, and this is used to roll the liquid crystal cell and the polarizing film or the circular polarizing film using a roll or a press.
- a force including a method of applying with pressure without causing bubbles to enter between and the liquid crystal cell is not limited to this.
- a method for manufacturing a film type color filter according to the fifth embodiment will be described with reference to FIG. Red (R) 395, Green (G) 396, color filters on a PET (ethylene terephthalate) film 390 with a film thickness of 30-100 / zm, which is wound around a roll, to be the first support substrate
- the coating thickness of the photosensitive resin layer 391 is preferably 5 111-20 111, more preferably 8 111-15 111. If it is 5 ⁇ m or more, it works well as a color filter or black matrix, If it is less than m, the light transmission will not be lowered.
- the photosensitive resin layer 391 has a coating thickness of 10 m, and the color filter layer after drying has a thickness of 1 ⁇ m.
- the photosensitive resin layer has a composition composed of a solvent component and a solid component, the solid component is composed of a transparent resin component, a dispersant, and a pigment, and the transparent resin component is composed of a polymerization initiator. It consists of a monomer and a thermal crosslinking agent or a photocrosslinking agent.
- the solvent component is a ketone, ester or ether having a boiling point of 100 ° C-200 ° C and a vapor pressure of lOmmHg or less, and the monomer is preferably a polyfunctional acrylate monomer. If it is less than lOmmHg, drying unevenness will not occur.
- a thermal crosslinking agent or a photocrosslinking agent is desirable because the (meth) acrylic acid + acrylic acid ester copolymer system increases the visible light transmittance.
- the photopolymerization initiator an imidazole-based, acetophenone-based, triazine-based or thixanthone-based initiator is preferable because it hardly causes a dark reaction. If the particle diameter is 0.1 ⁇ m or less, the light transmittance is not impaired.
- poly (ethylene terephthalate) resin polyethylene resin, polypropylene resin, polyester resin, ethylene butyl copolymer resin, polychlorinated butadiene resin, cellulose resin, polyamide resin. It is possible to use light, polyimide resin, polycarbonate resin, polystyrene resin, and vinyl acetate resin that have a light transmission function.
- the film having the polymer material strength of the first support substrate also has an advantage that it can be reused by washing and removing the photosensitive resin 391 from the support substrate in a later step.
- a cover film 392 made of polyester resin is pasted onto the photosensitive colored resin 391 (cover film pasting 1030) and wound on a take-up roll ( Figure ll (a)).
- chromium may be provided in a thickness of 0.1 ⁇ m—0.2 ⁇ m. Chrome can be provided by physical vapor deposition, but in this case, a film made of organic resin is preferred.
- the base film 390 which is the first base material in which the cover film 392 is bonded onto the black matrix photosensitive resin 391, is fed from the feeding roll, and the cover film is peeled off (cover film peeling 1040).
- a second base material 393 of a color filter made of a high heat-resistant resin is stuck on the surface on which the cover film 392 has been formed (CF base material sticking 1070).
- the base film 390 side force is exposed through the mask 1080, the base film 390 is peeled off (base film peeling 1090), the photosensitive resin 391 is developed and dried 1 100, and a black matrix is formed on the color filter substrate 393. Is done.
- cover film 392 is attached to the surface on which the black matrix is formed (cover film attachment 1110) (see Fig. 11 (b)).
- the cover film is a protective film for photosensitive resin 392, black matrix, and color filter, and it is desirable that the cover film be weakly adhered so that it can be easily attached and peeled off.
- weak adhesion means the function of releasing together with the base material supporting the adhesive layer without causing chemical or physical influence on the counterpart material when peeling, and the cover film is self-adhesive.
- a sticky material for example, a film using EVA (ethylene butyl acetate) resin, or an adhesive made of acrylic resin is diluted with a solvent, applied in a thin film, dried in hot air, ultraviolet This can be achieved by wire curing or electron beam curing.
- the photosensitive resin must be weakly adhered to the first supporting substrate.
- the photosensitive resin can be adhered to the supporting substrate by a method using the self-adhesive property of the photosensitive resin. .
- a layer made of photosensitive resin 391 is bonded to the CF substrate, it is desirable to block oxygen during exposure when using a film made of polymer resin for the CF substrate. It is preferable to provide an oxygen barrier film with a film thickness of 10nm-50nm, which also has an alumina strength.
- the oxygen barrier film is the same as the gas noria film of the base film, and is not limited to the acid silicate or alumina.
- the film thickness is preferably from lOnm to 50 nm. If the film thickness is lOnm or more, the oxygen barrier property is sufficient, and if the film thickness is: L m or less, there is no particular problem in production.
- a scratch resistant protection made of a polyester resin or a polyethylene resin is used. It is preferable to provide a film. If the film thickness is 10 ⁇ m-200 ⁇ m, a good film thickness is 10 m or more, and if the film thickness is 10 m or more, the scratch resistance of the photosensitive resin 391 is not damaged. If the film thickness is 200 m or less, there is no particular problem in production.
- the oxygen-blocking film also comprising an oxygen barrier can be produced by, for example, a continuous CVD apparatus.
- an oxygen barrier film with alumina strength can be made with a continuous PVD device.
- the exposure there is no particular problem with the exposure as long as it is an exposure method using a commonly used ultrahigh pressure mercury lamp as a light source, such as contact exposure and reduced projection exposure.
- a laser may be used as a light source for reduced projection exposure.
- the polymer resin of the photosensitive resin 391 is crosslinked by heating or ultraviolet irradiation.
- the photosensitive resin becomes stable with improved adhesion to the CF substrate.
- a red filter is formed on the CF base material 393 on which the black matrix is formed by the same manufacturing method.
- a green filter and a blue filter are formed to form a color filter layer 399 on the CF substrate (see FIG. 12). This is an example and the order of colors Can be determined arbitrarily.
- the cover film 392 may not be provided as long as the manufacturing apparatus can continuously apply, dry, and affix to the CF substrate on the base film.
- a feed roll and a scraping roll are arranged inside, and the film fed from the feed roll is processed. It is desirable that the inside and the outside be cut off, and at least the inside should have a cleanliness class of 1000 or less (0.1 to 0.5 m or less dust, 1000 Zm 3 or less), and nitrogen, helium, More preferably, the atmosphere is an inert gas such as argon.
- the color filter can form a spacer on the black matrix.
- a spacer may be provided by the same manufacturing method. .
- the spacer can be formed into a columnar shape or a prismatic shape by the same process as the color filter.
- the position is preferably formed on the black matrix and inside the black matrix. When considering the margin of alignment, it is more preferable to design so that it is inside the maximum value of misalignment.
- the height is preferably 3 ⁇ m-5 ⁇ m.
- the color filter layer 399 formed on the CF substrate 393 is pulled out from the feed roll to the take-up roll, and the TFT element, wiring, and pixel electrode are formed on the base film 380.
- the TFT layer 381 is transferred onto the formed functional film.
- the color filter 399 is transferred onto the TFT layer 401 by the transfer roller 2000 via the cover film 392. After the transfer, the cover film 392 is peeled off.
- the spacer of the color filter 399 is formed! It is transferred to the TFT layer on the ⁇ side. If the spacer 398 is not formed, the color filter 399 can be transferred to the TFT layer 401 on the surface in contact with the cover film.
- the cover film 392 may be wound around the scooping roll together with the base film without peeling off. [0465] Force explaining the configuration to transfer the color filter layer formed on CF base material 393 CF support base material can be bonded together with CF support base material 393 using a base film It is.
- Examples of the resin material used for forming the color filter layer include, but are not limited to, polyimide resin, PVA derivative resin, and acrylic resin.
- acrylic resins include alkyl acrylates or alkyl methacrylates such as acrylic acid, methacrylic acid, methyl acrylate, and methyl methacrylate, cyclic acrylates or methacrylates, hydroxyethyl acrylate, or methacrylates.
- Difunctional monomers include bifunctional, trifunctional and polyfunctional monomers.
- Difunctional monomers include 1,6-xandiol diatalate, ethylene glycol diatalate, neopentyl glycol sialate, and triethylene glycol diatali.
- trifunctional monomers such as trimethylolpropane tritalylate, pentaerythritol tritalylate, and tris (2-hydroxyethyl) isocyanate, and difunctional monomers such as ditrimethylolpropane tetraatalylate.
- Addition of diluted monomer The amount is preferably about 20 to 150 parts by weight per 100 parts by weight of acrylic resin.
- a pigment used for preparing a colored composition as an organic dye, as a red pigment, I. No. 9, 19, 81, 97, 122, 123, 144, 146, 149, 168, 169 , 177, 180, 192, 215, etc., green pigment CI No. 7, 36, etc., blue pigment CI No. 1 5: 1, 15: 2, 15: 3, 15: 4, 15: 6, 22, CI No. 23 as purple pigment such as 60, 64
- yellow pigments such as 51319, 39 42555: 2, and carbon etc. as black pigments.
- extender pigments include barium sulfate, barium carbonate, alumina white, and titanium.
- examples of the dispersant used for the preparation of the coloring composition include surfactants, pigment intermediates, dye intermediates, and Solsperse.
- derivatives of organic dyes derivatives such as azo, phthalocyanine, quinacridone, anthraquinone, berylene, thioindico, siloxane, and metal complex salts are suitable.
- organic dye derivatives are appropriately selected from those having a substituent such as a hydroxyl group, a carboxyl group, a sulfone group, a carbonamide group, and a sulfonamide group, in terms of dispersibility.
- the mixing ratio of the pigment is about 50 to 1 part by weight of the pigment with respect to 100 parts by weight of the acrylic resin, and the mixing ratio of the dispersing agent is about 1 to 10 parts by weight of the pigment. is there.
- an appropriate pigment is added as needed to adjust the spectral characteristics of the color filter.
- thermal cross-linking agent used for the preparation of the coloring composition examples include melamine resin and epoxy resin.
- melamine resin includes alkylated melamine resin (methylated melamine resin, butylated melamine resin, etc.) and mixed etherified melamine resin, which can be either high condensation type or low condensation type. good.
- Examples of the epoxy resin include glycerol, polyglycidyl ether, trimethylolpropane 'polyglycidyl ether, resorcin' diglycidyl ether, neopentyl glycol. Diglycidyl ether, 1,6-hexanediol 'diglycidyl ether, ethylene Glycol (polyethylene glycol) 'Diglycidyl ether.
- the mixing ratio of the thermal crosslinking agent is 10 to 50 parts by weight of the thermal crosslinking agent with respect to 100 parts by weight of the acrylic resin. Is preferred.
- a solvent used for the preparation of the colored composition toluene, xylene, ethyl acetate sorb, ethyl acetate sorb acetate, diglyme, cyclohexanone, lactic acid ethyl, propylene glycol monomethyl ether acetate and the like are suitable.
- a single or a plurality of solvents are appropriately selected depending on the thermal crosslinking agent, the dilution monomer, and the like.
- the coloring composition used for forming the color filter layer is composed of the above resin, pigment, dispersant, thermal crosslinking agent, solvent, and the like.
- this colored composition first, in order to mix the acrylic resin and the pigment, they are kneaded using three rolls to form a chip. Next, a paste is prepared by adding a dispersant and a solvent to the chip. A thermal crosslinking agent and a dilution monomer are added to this paste to form a coating solution for the colored composition.
- the black (black matrix), red, green, and blue coating liquids are applied in a predetermined pattern onto the support substrate by the inkjet method.
- the ink jet apparatus there are a piezo conversion method and a heat conversion method depending on the difference in the ink ejection method, and the piezo conversion method is particularly preferable.
- a device that has an ink particle frequency of about 5 to ⁇ , a nozzle diameter of about 1 ⁇ m to 80 ⁇ m, four heads arranged, and 1 to 1,000 nozzles in one head is suitable.
- the number of heads varies depending on the number of colors to be applied. For three colors of red, green, and blue, three heads may be arranged. The number of heads is preferably at least the same as the type of color to be applied, and the color is preferably changed for each head.
- an undercoat layer Prior to coating on the support substrate by the ink jet method, an undercoat layer combined with a coating liquid, a solvent, or the like may be provided in advance in order to adjust ink acceptability and wettability.
- a coating liquid e.g., polyimide resin, PVA derivative resin, acrylic resin, epoxy resin composition, etc.
- porous particles such as acid and alumina may be added to these.
- the matrix-like light shielding layer can be formed by a photolithography method or the transfer method, and may be before or after the color filter layer is formed by an ink jet method.
- an overcoat layer may be formed on the color filter layer as necessary. This is to supplement the flatness of the color filter layer in terms of appearance, moisture resistance in terms of resistance, chemical resistance, etc., and in order to secure a barrier property that prevents elution from the color filter layer. It is used for.
- a thermosetting type acrylic copolymer containing maleimide a transparent resin such as an epoxy resin composition is suitable.
- the color filter formed on the support substrate can be transferred to the functional film in the same process as the film type color filter.
- the transfer may be performed on the surface facing the overcoat surface of the color filter as described for the film type.
- the force may be applied directly on a functional film formed in the shape of a support substrate by an ink jet method.
- the color filter can be formed on the functional film by drying the color filter layer on the functional film.
- An overcoat layer may be formed on the color filter layer in the same manner as when the color filter is formed on the supporting substrate.
- a sixth embodiment of the present invention a concentrator array and a back-emitting light source using the concentrator array, will be described in detail with reference to the drawings.
- FIG. 30 is a schematic cross-sectional view of the back light source of the present example.
- an acrylic resin type film having a film thickness of 300 ⁇ m and containing 20% by weight of silica having a maximum particle diameter of 100 nm and an average particle diameter of 50 nm was used.
- a light collector array is formed on the light guide 701.
- a light diffusion film 704 is formed on the light collector array.
- the light diffusion film 704 contains 25% by weight of an inorganic filler having a film thickness of 40 ⁇ m, an average particle diameter of 2 ⁇ m, and a maximum particle diameter of 10 ⁇ m and having a silica force. As with the light guide 701, an acrylic resin type film was used.
- the back light source of the liquid crystal needs to be white light when displaying color, and the light source 705 is a light emitting diode that emits three colors of R (red), G (green), and B (blue). Are arranged (see Fig. 30 (b)). In this embodiment, three primary colors are used, but two colors having a complementary color relationship, for example, blue and yellow, or a white light emitting diode may be used.
- the light guide 701 When the light guide 701 is thinner than the light emitting diode of the light source, the light can be collected and guided to the light guide 701 by a well-known method.
- the reflective film 702 If the reflective film 702 is disposed on the surface of the light guide 701 facing the light collector array, the light from the light source can be efficiently used.
- the reflective film 702 an aluminum thin film having a thickness of lO / zm was used. There is no upper limit on the film thickness, but 20 m is considered the upper limit considering the limit on weight'thickness. On the other hand, if the lower limit is 1 m or more, it functions as a reflective film.
- the light collector array 703 formed on the light exit surface of the light guide 701 (in FIG. 30 (c), one power is not shown. .) Since the light is taken in and taken out by using total reflection, the reflective film 702 is not particularly necessary, but the reflective film is used on the back surface of the light guide to reuse the reflected light at the interface. And light can be used efficiently.
- the light collector can take various shapes as shown in Fig. 31, but the area of the surface of the light collector that contacts the light guide is the surface of the light collector that faces the surface. Must be formed narrower than the area
- the cross-sectional shape is preferably an arc, a parabola, an ellipse, a part of a trapezoid, or a combination thereof. Furthermore, it is preferable that the top is flat in view of the adhesiveness with the light guide.
- FIG. 32 is an overhead view of the light collector array.
- b is preferably 10 ⁇ m or more and 100 ⁇ m or less, more preferably 20 ⁇ m or more and 70 ⁇ m. If it is 10 ⁇ m or more, no interference fringes are generated in the liquid crystal. If it is 100 / z m or less, the light utilization efficiency is not lowered.
- a size of 500 ⁇ m force and 10 ⁇ m does not cause a defect in manufacturing a light collector array, and further does not cause a transfer error during transfer.
- the thickness is preferably not less than bZ3.
- the size of b of the light collector is preferably 20 ⁇ m or more and 60 ⁇ m or less. If the dimension b of the light collector is 20 ⁇ m or more and 60 ⁇ m or less, the light collector can be formed with a thickness of 7 ⁇ m-20 ⁇ m.
- the back-emitting light source could be formed with a thickness of 350 ⁇ m (0.35 mm). Compared to 0.8 mm of the conventional light guide, it can be made thinner. In the case of the present invention, it is necessary to increase the film thickness as the size of the conventional light guide increases. There is no need to increase the thickness. Furthermore, since the backside light emitting source of the present invention can use a flexible thin film as a light guide, impact resistance can be remarkably improved.
- the light collector array 703 can be obtained by coating the female mold with an ultraviolet-cured resin 709 and curing it with the support film 708 pressed from the resin side, and releasing the female mold force after curing ( ( Figure 33).
- coat 707 on the base film, and with the UV side pressed against the female mold, UV light is applied to the part pressed by the female mold to cure and release from the female mold after curing.
- the ultraviolet rays can also irradiate the back side force of the support film 708 (see FIG. 34) or the female side force (see FIG. 35).
- the curing degree of the resin should be such that the shape of the pattern can be maintained without the polymerization of the resin being completely completed.
- Examples of the ultraviolet curable resin 709 that can be used include an curable resin cured by active energy rays or heat irradiation.
- the same acrylic resin as that of the support film 708 is used as an example, but it is not limited to acrylic resin! /.
- the active energy ray used for curing is preferably ultraviolet rays.
- Examples of the lamp that generates ultraviolet rays include a metal halide type and a high-pressure mercury lamp.
- photopolymerization initiator that generates radicals.
- the photopolymerization initiator used in this case include benzophenone, benzoin methyl ether, benzoin propyl ether, jettoxin.
- examples include sacetophenone, 1-hydroxyne chlororoofenyl ketone, 2,6-dimethylbenzol diphenylphosphine oxide, 2,4,6-trimethylbenzoyldiphosphine oxide, and benzophenone. Two or more of these photopolymerization initiators may be used in combination.
- the content of the photopolymerization initiator is preferably 0.01-2 parts by weight with respect to 100 parts by weight of the organic component containing a (meth) acryl group. If the amount is too small, the sensitivity may be poor and curing may be insufficient. If the amount is too large, the sensitivity may be too high, and a curing reaction may occur during compounding, resulting in poor coating.
- thermal polymerization initiator In the case where thermal polymerization is performed by applying heat, a thermal polymerization initiator can be contained as necessary.
- the thermal polymerization initiator used in this case include benzoyl peroxide, diisopropyl peroxy carbonate, and t-butyl peroxy (2-ethylhexanoate).
- the amount used contains a (meth) acrylic group. 0.01 to 1 part by weight is preferable for 100 parts by weight of the organic component.
- the support film 708 has a high transmittance with respect to the wavelength at which the ultraviolet curable resin 709 is mainly cured, ultraviolet light may be irradiated from the film side (Fig. 34). Further, when the transmittance of the support film 708 with respect to the wavelength is low, the female mold is manufactured using a transparent material that is excellent in transparency with respect to the wavelength, and ultraviolet rays are irradiated from the female mold side (FIG. 35).
- the light diffusion film is formed as a single film as shown in FIG. 36, but is laminated as shown in FIGS. 37 and 38. It may consist of a film.
- the light diffusion film is formed immediately above the light collector array 703.
- a light diffusion layer 712 is formed on a support film 708. Any of the configurations shown in FIGS. 36 to 38 may be used.
- a light collector array is manufactured on the support film by the method shown in Fig. 33-35.
- the condensing element array is transferred onto the base film serving as the light guide.
- the support film may be bonded together.
- a reflective film that also has a metal isotropic force for example, aluminum having a thickness of 10 m, is disposed in advance on the surface of the base film that serves as the light guide, which faces the surface on which the light collector array is formed.
- a metal isotropic force for example, aluminum having a thickness of 10 m
- FIG. 39 a schematic cross-sectional view of the liquid crystal structure using the obtained light collector array, the support film in which the light collector array is formed on the substrate is in contact with the substrate and the light collector array.
- the liquid crystal is formed on the laminated support film.
- the base films are bonded together without being cut to form a plurality of liquid crystal panels in a single film shape, and then individual liquid crystal panels are formed by precision cutting.
- the method of manufacturing the liquid crystal panel of FIG. 40 can be manufactured in the same manner as described above, and thus detailed description thereof is omitted.
- a process (Fig. 41) can be used in which a specific number of liquid crystal cells are cut and then precisely cut to fit the display size. Furthermore, it is possible to apply a process in which a specific number of liquid crystal cells are cut out and bonded to the light guide plate (Fig. 42).
- Examples of the cutting method performed in this step include cutting by scanning with a laser beam or punching with a Thomson blade. To obtain a liquid crystal panel by precision cutting, it is necessary to cut the sealing material.
- the width of the liquid crystal sealing material is desirably 2 mm or more. If it is smaller than this, there is a concern about the occurrence of defects such as peeling during cutting. More desirably, it is 3 mm or more.
- a liquid crystal panel with a backside light source of about 470 ⁇ m could be manufactured even when a condenser was used as the backside light source.
- the film thickness of the light guide using a film having a film thickness of 300 / zm as the light guide was manufactured at 200 / zm.
- the film thickness of the liquid crystal panel was about 370 ⁇ m.
- the light-emitting layer is composed of a single layer or multiple layers of organic compounds or complexes of several tens of nanometers and several hundreds of nanometers inclusive of the light-emitting layer.
- the electron and hole coupling efficiency in the light source is improved, and the luminous efficiency is improved by the combined excitation energy. improves.
- a hole transport layer that plays a role of efficiently transporting holes in contact with the anode electrode (anode), a light emitting layer including a light emitting material, a force sword electrode It becomes the three layers of the electron transport layer that contacts the negative electrode and efficiently transports electrons.
- a lithium fluoride layer, an inorganic metal salt layer, a layer containing them, or the like may be arranged at an arbitrary position.
- the light emitting layer is used to obtain white light emission, or the hole transport layer or the electron transport layer is not limited to a single layer, in order to efficiently transport holes or electrons. It may be configured.
- the organic EL device needs to emit white light (for example, daylight standard light source D65 (color temperature 6500K)) for use as a liquid crystal knocklight. Since none of the materials show white light emission, a plurality of light emitting colors are simultaneously emitted by a plurality of light emitting materials to obtain white light emission by color mixing. As a combination of a plurality of emission colors, those containing the three emission maximum wavelengths of the three primary colors of blue, green and blue may be used, or the complementary colors such as blue and yellow, blue green and orange are used 2 Although it may be one containing two emission maximum wavelengths, it is necessary to emit light that matches the spectral transmittance of each color filter.
- white light for example, daylight standard light source D65 (color temperature 6500K)
- a plurality of light emitting colors are simultaneously emitted by a plurality of light emitting materials to obtain white light emission by color mixing.
- a combination of a plurality of emission colors those containing the three emission maximum wavelengths of the three primary colors of blue, green
- OLEDs emit light by using fluorescence from organic materials and once excite organic materials that serve as light-emitting hosts. Some use phosphorescent dopants that emit light. At present, no material that emits phosphorescence alone has been found, but it goes without saying that any organic material that emits phosphorescence alone can be used! /.
- White light is a combination of these fluorescent organic materials, a combination of phosphorescent organic materials, and a combination of fluorescent organic materials and phosphorescent organic materials. Also good! ,.
- the combination of the materials of the light emitting layer for obtaining white light is not particularly limited, and may be selected and combined so as to suit the wavelength range according to the spectral transmittance of each color filter.
- the luminescent host is a force rubazole derivative, bif Examples thereof include materials containing a partial structure as a unit, such as a nil derivative, a styryl derivative, a benzofuran derivative, a thiophene derivative, and an allylsilane derivative. Of these, carbazole derivatives and biphenyl derivatives are preferred luminescent materials exhibiting high 1 ⁇ emission efficiency.
- the material is not particularly limited, but any material having a function of transmitting holes from the anode electrode to the light emitting layer may be used.
- a material that is commonly used as a charge injection material for holes or a known medium force that is used for a hole transport layer of an EL element can be selected and used.
- any material can be selected from conventionally known materials as long as it has a function of transmitting electrons from a force sword electrode that is not limited to the light emitting layer. Can be used.
- the light emitting layer can be formed by a known thin film forming method such as a vacuum deposition method, a spin coating method, a casting method, a spray method, an inkjet method, a paint method, or a printing method.
- a known thin film forming method such as a vacuum deposition method, a spin coating method, a casting method, a spray method, an inkjet method, a paint method, or a printing method.
- the reflective film preferably has a reflectance of at least 60% in order to efficiently reflect light emitted from the light emitting layer and external light.
- the transparent electrode layer has a metallic material strength of several tens of force and several hundreds of nanometers with a transmittance of 60% or more.
- the metal material used as the anode can be selected and used from known metals, metal oxides, alloys, electrically conductive compounds, mixtures thereof, and the like. Work function force eV or more If this material is used, it is preferable because holes can be efficiently injected into the light emitting layer.
- Examples of the material of the anode include metals such as Au, conductive materials such as Cul, indium tin oxide (ITO), indium zinc oxide (IZO), SnO, and ZnO.
- the anode having a high reflectance may be formed by laminating the above material and a metal material having a high reflectance such as aluminum.
- a metal material having a high reflectance such as aluminum.
- an anode laminated with ITOZ film in order from the light emitting layer may be used, or aluminum may be formed as a reflective foil, and ITO may be used as an anode through an insulating film, for example, an oxide film.
- the metal material used as the cathode can be selected from known metals, alloys, electrically conductive compounds, mixtures thereof, and the like, but has a work function force of eV or less. Application of this material is preferable because electrons can be efficiently injected into the light emitting layer.
- metal material of the cathode sodium, sodium potassium alloy, magnesium, lithium, magnesium Z silver mixture, magnesium Z aluminum mixture, magnesium Z aluminum mixture, aluminum, aluminum Z acid-aluminum mixture, rare earth metal, etc. Is mentioned.
- a thin film cathode material and an anode electrode material having a high transmittance may be laminated.
- a transparent force sword electrode can be formed by laminating with thin film aluminum ZITO in order from the light emitting layer.
- Both the cathode and the anode are formed by vapor deposition, sputtering, or the like.
- the electrode may be formed by coating an electrically conductive compound dispersed in a suitable binder resin.
- a pattern having a desired shape is formed by photolithography after the electrode is formed, or a mask having an opening having a desired shape is formed during vapor deposition or sputtering. OK.
- the organic EL element of Configuration 1 uses PVK as a light-emitting host of a polymer material and phosphorescence of Ir6 and Irl2 as phosphorescent dopants.
- the embodiment of the power organic EL device is a top emission type that emits two emission maximum wavelengths: Ir6, which has a maximum emission wavelength in red, and Irl2, which has a maximum emission wavelength between green and blue.
- Ir6 which has a maximum emission wavelength in red
- Irl2 which has a maximum emission wavelength between green and blue.
- the surface of the base film for forming the organic EL element was etched by oxygen plasma.
- a metal anode electrode serving as a reflective electrode layer was formed on the etched base film by depositing aluminum with a thickness of 100 nm and ITO with a thickness of 50 nm by sputtering.
- PEDOTZPSS solution to form a hole transport layer by depositing a film thickness of 100 n m by (polyethylenedioxythiophene O Kishichiofen polysulfone acid-doped body Bayer Baytron) a printing method. After drying by heating, 30 mg of PVK of the light emitting host, 0.2 mg of phosphorescent dopant Ir6, 2.
- Omg of phosphorescent dopant Ir12, and electron transport material 2— (4-biphenyl) -6 — (4 t-butylphenol) 1,3,4-oxadiazole (OXD) 2 mg was dissolved in 2 ml of dichloromethane, and deposited by a printing method to a film thickness of lOOnm to form a light emitting layer, which was dried by heating.
- the materials used for the organic EL element of Configuration 2 are CBP, Ir6, Irl2, a NPD, BC, and Alq3.
- the organic EL device with this configuration is a bottom emission type that emits two emission maximum wavelengths using phosphorescence of low-molecular-weight light-emitting host CBP and phosphorescent dopants Ir6 and Irl 2.
- the embodiment of the EL element is not limited to this.
- the surface of the base film for forming the organic EL element was etched by oxygen plasma.
- ITO was formed into a film with a thickness of 100 ⁇ m on the etched base film by sputtering to form a transparent anode electrode to be a transparent electrode layer.
- a NPD was deposited at a deposition rate of 0.5 nmZs by resistance heating in a vacuum deposition method in an environment with a vacuum degree of 104 Pa.
- a hole transport layer was formed to a thickness of 20 nm.
- the CBP of the luminescent host is deposited by resistance heating with a deposition rate of 0.5 nmZs
- the phosphorescent dopant Ir6 is deposited with a deposition rate of 0.005 nmZs
- the phosphorescent dopant Irl2 is deposited with a deposition rate of 0.02 nmZs.
- the light-emitting layer was formed by co-deposition with a film thickness of 30 nm.
- BC was vapor-deposited at a deposition rate of 5 A / s by resistance heating on the light-emitting layer by resistance heating, and then deposited to a thickness of 10 nm.
- lithium fluoride is vapor-deposited at a vapor deposition rate of 0. Olnm / s by resistance heating to form a film with a thickness of 0.5 nm.
- aluminum was deposited at a deposition rate of InmZs, and a metal sword electrode was formed as a counter electrode layer by forming a film with a thickness of lOOnm.
- This solution was uniformly applied to each of the functional films A and B from which the roll force had been cut, using a flexographic printing machine, and dried at 100 ° C for 15 minutes.
- the surface of the coating film thus obtained was irradiated with linearly polarized ultraviolet rays having a wavelength of around 365 nm of 30 jZcm 2 from an ultra-high pressure mercury lamp, and the photo-alignment operation was performed.
- the same surface was irradiated with unpolarized ultraviolet light having a wavelength of 313 nm of 50 miZcm 2 from the ultrahigh pressure mercury lamp with a cumulative amount of light, and polymerization operation of the aligned photoalignment material was performed.
- the seal material was synthesized by combining a nitrogen gas introduction tube, a stirrer, and a cooling tube! 444 parts of isocyanate was charged, 0.1 part of tin octylate was added as a catalyst, and the mixture was reacted at 60 ° C for 1 hour. Next, 260 parts of 2-hydroxypropyl acrylate and 0.4 parts of t-butyl nodroquinone as a polymerization inhibitor and octyl as a catalyst 0.2 parts of tin oxide was added, and the mixture was further reacted at 70 ° C for 11 hours to obtain a carboxyl group-containing urethane acrylate having a residual isocyanate of 0.05%.
- PTG-850 (made by Hodogaya Chemical Co., Ltd .: polytetramethylene glycol with a number average molecular weight of 850) 18 parts, maleimidocaproic acid 9.8 parts, p-toluenesulfonic acid 1.2 parts and 2 , 6 tert-Butyl-p-Talesol 0.06 parts and 15 parts toluene, 240 torr,
- the reaction was continued with stirring for 4 hours under the condition of 80 ° C. while removing generated water.
- reaction mixture was dissolved in 200 parts of toluene and washed 3 times with 100 parts of saturated sodium bicarbonate and once with 100 parts of saturated Japanese salt water.
- the organic layer was concentrated to obtain a maleimide derivative, polytetramethylene glycol bis (maleimidocaproate).
- Acidic aluminum spheres with a diameter of 3 m were mixed in the desired part of functional film A or functional film B on which a liquid crystal alignment film was formed (for example, the outer edge or the outer edge of each pixel cell).
- a photocurable resin composition was applied, placed opposite to each other, bonded together, and irradiated with ultraviolet light at 500 mjZcm 2 using a metalno and ride lamp to cure the sealant. Thereafter, a desired liquid crystal was injected and filled, and the photocurable resin composition was similarly cured to seal the injection hole.
- the liquid crystal aligning agent was applied onto the support film using a printing machine for applying liquid crystal alignment film, and dried on a hot plate at 150 ° C for 90 minutes to form a dry average film thickness of 0.06 m. did.
- a rubbing machine that has a roll with a rayon cloth wrapped around this coating film, the rubbing process is performed at a rotational speed of 400 rpm, a stage moving speed of 3 cmZ seconds, and a length of pushing the hair foot of 0.4 mm, followed by washing with water. Then, the film was dried on a hot plate at 100 ° C for 5 minutes to obtain an alignment film.
- An active drive type liquid crystal display panel will be described as a ninth embodiment of the present invention.
- FIG. 14 is a cross-sectional view of the active drive type liquid crystal display panel of the present embodiment.
- FIG. 14 shows a transflective liquid crystal display panel described in the prior art. The difference from Fig. 27 is that the knock light part is replaced with an LED light source, a backlight using a condensing film, and a glass substrate with a base film.
- the liquid crystal panel is composed of the first functional film, the second functional film, and the third functional film force.
- the pixel electrode 360, the element layer 375 including the wiring and the thin film transistor 361, and the alignment film are transferred onto the base film 362 by the above-described method.
- the color filter 355, the transparent electrode 356, and the alignment film 357 are transferred onto the base film 354 by the method described above.
- the third functional film is at least a light collector film, and the light collector 366 and the support film 365 are transferred onto the base film 368.
- the retardation film 363 and the polarizing film 364 may be formed by being transferred onto the transparent electrode 365 or may be formed by being transferred onto the base film 362.
- the alignment film 359 formed on the second functional film 371 is replaced with the base film of the first functional film 372.
- An optical functional thin film 376 composed of a retardation film and a polarizing film formed on the third functional film 377 is transferred to 362.
- the cover film is not formed on the first functional film, the second functional film, and the third functional film, but they may be formed. Further, the optical functional thin film 376 may be transferred onto the support base material 373 in any order. Transfers can be made in order according to the design according to Figure 3 above.
- the base film 362 in the configuration of FIG. 14 can be omitted by sequentially transferring a condensing film, an optical functional thin film, a pixel electrode, and the like onto the base film 368.
- FIG. 16 is a cross-sectional view for explaining the configuration of the active drive type liquid crystal display panel of the present invention.
- the active drive type liquid crystal display panel of this example is composed of a second functional film in which a knocklight is formed and a first functional film in which a thin film transistor is formed. It is comprised across.
- the thickness of the second functional film on which the knocklight is formed and the thickness of the first functional film on which the thin film transistor is formed are both about 0.2 mm.
- the first functional film is a plastic substrate to be a support substrate.
- a thin film transistor circuit 402 On one surface of the (base film), a thin film transistor circuit 402, a pixel electrode 403, a color filter 404 such as red, green, and blue, a spacer A, and an alignment film 405 are formed.
- a linearly polarizing film and a retardation film are formed on the other surface. It should be noted that the spacer is not particularly problematic when formed on the second functional film.
- the second functional film B includes a light collector 412, a support film 411, a reflective electrode 413, a polarizing film 410, a retardation film 409, a transparent counter electrode 408 facing the pixel electrode 403 of the liquid crystal element,
- the alignment film 407 is formed, the alignment film 405 formed on the first functional film and the alignment film 407 formed on the functional film B are arranged to face each other, and the liquid crystal 406 is arranged in the gap. Is.
- An alignment film for aligning the liquid crystal in a desired direction is formed on the surface of the backlight and the functional film in contact with the liquid crystal, and a spacer A for keeping the distance between the two constant. Arranged below the rack matrix.
- the arrangement pitch of the pixel electrodes in Fig. 16 is determined by the definition of the active-drive LCD panel. For example, R (red), G (green), and B (blue) with a resolution of 200ppi (pixEL per inch)
- the thicknesses of the various layers in FIG. 16 are the transparent electrode, the counter electrode, and the pixel electrode made of an ITO film.
- the thickness is 0.1 ⁇ m—0.2 m.
- the thin film transistor and the wiring are Polycrystalline silicon film and metal (usually aluminum or aluminum alloy) with a thickness of 0.1 l / zm—O.
- the thickness of the backlight part using a condensing film is 0.4 mm—0.6 mm, including the thickness of the base film, 2 ⁇ m—6 ⁇ m, and the difference between the liquid crystal 0.5 m—10 ⁇ m (conventional, 100 ⁇ m—300 ⁇ m), polarizing film: 5 ⁇ m—50 ⁇ m (conventional, 100 ⁇ m—250 111), alignment film: 0. Ol / zm—O.2 111 (conventional, 0.04 m—2), color filters can be developed with 1 111-3 111 (conventional, 100 111-200 111).
- the transistor layer is 0.5 m
- the color filter is 2.5 m
- the polarizing film is 8 ⁇ m
- the retardation film is 7 m
- the alignment film is 0 .: L m
- the liquid crystal part is 6 m. It was formed at ⁇ m.
- the base film was an acrylic resin type film with a thickness of lOOnm.
- a backlight using a condensing film could be formed at about 470 m.
- the liquid crystal panel was about 490 / ⁇ ⁇ (0.49 mm) including the knocklight, and the liquid crystal panel could be thinned.
- the liquid crystal panel can be wound on a roll with a radius of 40 mm, and a liquid crystal panel could be manufactured as if it were a conventional paper-like sensation.
- the color filter Z phase difference film Z polarization film Z alignment film can be formed significantly thinner than before by devising the manufacturing method 'materials.
- the distance between the electrode and the reflective electrode can be made sufficiently smaller than the pixel electrode arrangement pitch of about 40 m.
- the liquid crystal part (3 m), the retardation film (3 m), the polarizing film (6 m), and the alignment film (0.01 m) could be reduced to 15 m or less. .
- the reflectance of the reflective film can be made equivalent to that of a conventional reflective liquid crystal display panel, and the light utilization rate of the knocklight is the same as that of the conventional transmissive liquid crystal display panel.
- a liquid crystal display panel equivalent to the liquid crystal display panel can be obtained.
- the configuration of the liquid crystal display device using the liquid crystal display panel of the present embodiment operates as a reflective liquid crystal display device by reflecting outside light in a bright! / Place, and in a dark place, It operates as a transmissive liquid crystal display device by the back light.
- the light efficiency of both the external light source and the back light source is improved as compared with the conventional transflective liquid crystal display device.
- it since it functions as a reflective liquid crystal display device in bright places, an image equivalent to that of a reflective liquid crystal display device can be obtained. In dark places, the light intensity of the backlight can be lower than that of a transflective liquid crystal display device. it can.
- a liquid crystal display device is a device that displays an image based on image data input from the outside (for example, displays only an image based on an image signal input from an external force such as a display of a personal computer). Means something).
- Information terminals such as televisions, notebook personal computers, mobile phones, and PDPs with display functions are distinguished from electronic devices equipped with liquid crystal display devices.
- the backlight in a bright place can be cut off, which contributes to reduction of power consumption.
- the battery life can be extended.
- a method for producing functional film A will be described with reference to FIG. As shown in FIG. 17, a first film having a transistor layer 452 formed on a base film 451, a second film having a color filter formed on a support film 453, and a spacer on a support film 453. And a fourth film in which an alignment film 456 is formed on a support film 453 are prepared.
- the first film on which the transistor layer is formed is fed out and fed to a roll take-up roll. On the way, the force filter 454 formed on the second film is peeled off, and the support film 453 is peeled off. Transferred onto the transistor layer 452.
- the spacer 455 formed on the third film is transferred to the color filter 454 after peeling off the support film 453, and finally the alignment film 456 formed on the fourth film. After peeling the support film, it is transferred onto the spacer to form the functional film A.
- the functional film B is manufactured in the same manner as the functional film A.
- a fifth film in which a reflective electrode is formed on a base film, a sixth film in which an organic light emitting layer is formed on a support film, a seventh film in which a transparent electrode is formed on the support film, An eighth film having a polarizing film formed on a support film, and a retardation film on the support film Prepare a ninth film in which is formed and a tenth film in which an alignment film is formed on the support film.
- the fifth film on which the reflective electrode is formed is fed out, and the roll force is also fed to the take-up roll, and the organic light emitting layer formed on the sixth film is peeled off from the support film 453 on the way, and then reflected. Transfer onto the electrode.
- the transparent electrode formed on the seventh film is peeled off, and the polarizing film formed on the eighth film is peeled off from the organic light emitting layer, and transferred to the transparent electrode.
- a protective film for protecting the organic light emitting layer made of an organic material is formed by physical vapor deposition.
- the protective film may be an organic substance or a mixture of an organic substance and an inorganic substance. In this case, the protective film may be formed on a support film and formed on the transparent electrode using the same transfer method.
- the retardation formed on the ninth film is transferred onto the polarizing film, a transparent electrode is formed on the retardation film by physical vapor deposition, and the tenth film is formed on the transparent electrode.
- the functional film B is completed by transferring the alignment film formed above.
- the alignment films formed on the functional films A and B are arranged to face each other at a predetermined angle, and a liquid crystal is filled in the gap between the alignment films to complete a liquid crystal panel.
- the operation as a transmissive liquid crystal display panel will be described.
- the white light emitted from the base film 413 as a light guide, the condensing film 412 and the backlight 414 as a force is unpolarized, but only one linearly polarized light is transmitted through the polarizing layer 410 and the liquid crystal layer 406.
- the alignment state of the liquid crystal molecules is controlled by the presence or absence of an applied potential to the pixel electrode 403 which is a transparent electrode of the pixel. That is, in an extreme alignment state, the downwardly polarized linearly polarized light in FIG. 16 is transmitted through the liquid crystal layer as it is, and light in a specific wavelength range passes through the color filter 404 and the pixel electrode 403 composed of a transparent electrode. The light is transmitted and almost completely absorbed by the polarizing layer 400. Therefore, this pixel displays black.
- FIG. 16 uses the functional film A in which the thin film transistor circuit and the color filter are transferred in the order of the base film as the functional film A. May be used.
- FIG. 18 is a cross-sectional view showing the configuration of the first modification. The difference from FIG. 16 is the positional relationship between the thin film transistor and the color filter.
- the color filter 404 is disposed on the liquid crystal side of the functional film A, but these may be disposed on the backlight side of the functional film B.
- FIG. 17 is a diagram showing a second modification example of the eighth embodiment. The difference from the ninth embodiment, modification 1 and modification 2 is that the color filter 404 is formed on the functional film on the backlight side and is disposed on the liquid crystal side of the transparent electrode of the liquid crystal element. .
- the film is formed through a process of sequentially providing films having various functions on the functional film.
- the functional film B on the backlight side should be given functions such as a reflective electrode, a light emitting layer, a transparent electrode, a sealing layer, a polarizing function, and a transparent electrode in order to form a part of the organic EL device and liquid crystal device.
- functions such as a reflective electrode, a light emitting layer, a transparent electrode, a sealing layer, a polarizing function, and a transparent electrode in order to form a part of the organic EL device and liquid crystal device.
- the tenth embodiment of the present invention will be described with respect to an example in which unevenness is provided on the reflective electrode.
- This example is based on the formation of a reflective film after forming irregularities on a base film or a substrate having a functional film force.
- the reflective film formed on the irregular surface is: 1. a metal thin film By forming the reflection film, a diffuse reflection film can be obtained. At this time, a semi-transmissive film that transmits and reflects light at a desired ratio can be obtained by forming the reflective film thinly or partially. 2.
- a desired transflective film made of an insulator other than metal can be obtained by providing a refractive index difference between the reflective polarizing film and the medium forming the light diffusion surface instead of the metal film.
- the transmissivity of the reflective film is determined by the design of the liquid crystal, and translucency may be required or may not be required. If transparency is not required, it can be solved by designing the transmittance to be 0%.
- the reflective film it is sufficient to select a material appropriately depending on the wavelength region to be reflected.
- the visible wavelength region is 300 nm to 800 nm, and the reflectance is high!
- Metal for example, aluminum Gold, silver, or the like is formed by vacuum deposition or sputtering.
- a known reflection-enhancing film (for example, refer to Optical Overview 2 (Junpei Uchiuchi, Asakura Shoten, published in 1976)) may be laminated by the above method.
- the thickness of the reflective film is preferably 0.01 ⁇ m-50 m.
- the reflective film may be patterned only by a photolithography method, a mask vapor deposition method, or the like, if necessary.
- the function as a semi-transmissive / semi-reflective film can be controlled by the thickness of the reflective film or the aperture ratio of pattern formation according to the desired transmittance.
- the method for forming irregularities on the reflective film is as follows: an energy-sensitive resin layer is formed on the above-mentioned irregular surface of the substrate, and the energy sensitivity is obtained through a patterned mask or by a direct drawing method. A method of irradiating the active resin layer with active energy rays to remove the exposed or unexposed portion of the resin layer with a developer, and forming a thin film layer on the surface on which the unevenness is to be formed. There are a method of transferring by pressing the surface of the transfer master and a method of laminating a thin film layer on the transfer master and transferring the thin film layer to the surface where the irregularities are to be formed.
- the method of forming the energy-sensitive resin layer includes roll coater coating and spin coater coating. Spray coating, dip coater coating, curtain flow coater coating, wire bar coater coating, gravure coater coating, air knife coater coating, cap coater coating, etc.
- the energy-sensitive resin layer is applied on the concave / convex formation planned surface by the above method.
- the non-turned mask or direct drawing pattern has a regular or irregular pattern consisting of an active energy ray blocking portion and an active energy ray transmitting portion, and the active energy ray blocking portion and the active energy ray.
- blocking portion, or the distance between the active energy ray transmissive portion and the active energy ray transmissive portion, 1 mu m - and more preferably to 50 mu is preferably to m fixture 5 m-20 mu m.
- the pattern shape is not particularly limited, and examples thereof include a circle, an ellipse, a ring shape, a polygon, a curve, a straight line, or a collective shape of each shape.
- Examples of light sources for active energy rays include carbon arc lamps, ultra-high pressure mercury lamps, high-pressure mercury lamps, xenon lamps, metal nanoride lamps, fluorescent lamps, tungsten lamps, and excimer lasers. preferable.
- the active energy dose is preferably 0. OljZcm 2 — ljZc m 2. 0. OljZcm 2 — 0.5 jZcm 2 is more preferable. 0.05j / cm 2 ⁇ 0. Lj / cm 2 is particularly preferable.
- the mask where the energy-sensitive resin layer is removed is the active energy ray blocking part, and the rest is the active energy ray transmitting part After the step of irradiating with active energy rays using a mask formed with
- the energy-sensitive resin layer is developed. That is, inorganic hydroxides such as sodium hydroxide, lithium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium metasilicate, monoethanolamine, diethanolamine, triethanolamine, tetramethylammo -The ability to spray an aqueous solution containing organic bases such as umhydride oxide, triethylamine, n-butylamine, or salt, or immersion in an aqueous solution to remove unexposed areas, or to remove to a desired depth .
- inorganic hydroxides such as sodium hydroxide, lithium hydroxide, sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium metasilicate, monoethanolamine, diethanolamine, triethanolamine, tetramethylammo -The ability to spray an aqueous solution containing organic bases such as umhydride oxide, triethylamine, n-butylamine, or salt, or immersion in an aqueous
- the energy-sensitive negative-type resin layer where the uneven shape needs to be maintained are collectively heated or irradiated with active energy rays to correct or fix the surface uneven shape.
- the energy-sensitive resin layer is a negative type.
- the composition of the energy-sensitive resin layer is not particularly limited, and is negative or positive. Is not particularly limited.
- Energy sensitive resin layer strength For example, using a negative resist (CR-700) manufactured by Hitachi Chemical Co., Ltd., a surface uneven shape can be obtained by the above method.
- a negative resist CR-700
- a positive type resist PC403
- JSR JSR
- the unevenness formed by the above-described method can be used as a mold to form a transfer prototype.
- the shape is opposite to the original surface irregular shape.
- the surface shape when transferred using the transfer prototype is the same shape as the original surface shape.
- a surface obtained by the above-described surface unevenness forming method can be used as a direct transfer master, and further, a transfer master using the surface unevenness of the transfer master as a mold can be used. In this case, since the transfer is performed twice, the transfer pattern has the same surface asperity shape as the first surface asperity shape.
- the method for transferring the surface irregularity shape is not particularly enumerated, the thin film layer in which the surface irregularity shape is transferred in advance by laminating a thin film layer on the transfer prototype in addition to pressing the transfer prototype against the thin film layer. It is also possible to transfer the image. It is a matter of course that the transfer method described in the embodiment and other examples can be used!
- the transfer master use is made of a substrate, such as a sheet, belt, roll, roll, or part of a curved surface, on which the entire surface or a necessary portion has a number of fine surface irregularities formed. It can be used by being attached to a pressurizing device, or sandwiched between a pressurizing device and a surface on which a surface irregular shape is formed. Heat, light, etc. may be applied in the pressing process.
- the surface irregularities can be easily made seamless. It is necessary to design the degree of unevenness on the surface of the transfer master in consideration of deformation during the curing of the thin film layer that is normally transferred.
- the difference in height between the concave and convex portions is 0.1 / ⁇ ⁇ —15 / ⁇ ⁇ , Is 0.1 ⁇ m—5 ⁇ m, and the pitch force of the convex ridge is 0.7 ⁇ m or more
- 150 m! / ⁇ is the smaller of the pixel pitches, or even 2 ⁇ m or more 150 ⁇ m or It is preferable that the pixel pitch is smaller or smaller.
- FIG. 19 is a cross-sectional view of an example of a transfer prototype used for forming a surface uneven shape
- FIG. 21 is a cross-sectional view of an example of a functional film.
- the pitch of the convex part is 0.7 m or more and 150 m or the pixel pitch, whichever is smaller, or 2 m or more, 150 m or pixels It is preferable that one of the pitches is smaller or smaller.
- the value of a depends on the material of the thin film layer. Or 1 or 0.7.
- the irregularities are arranged in a cycle that is divided by the same force or integer as the pixel pitch, or in an irregular arrangement.
- moiré does not occur as long as it is used intentionally on the LCD as long as it does not intentionally have periodicity.
- the surface shape of the uneven surface is not particularly limited, but is not limited to a composite plane, but also a concave or convex curved surface, a concave and convex composite curved surface, or a concave curved surface or convex curved surface approximating a spherical surface or a parabolic surface, or an uneven composite surface.
- a curved surface is preferred. This is because by using a curved surface, diffused light from a wider range of light source positions can be expected.
- the average height difference H takes into account the cell gap and And (refractive index 'thickness). Smaller is preferable.
- the pitch P of the convex portion cannot be made so small that light interference occurs, the lower limit of the average height difference H can be obtained from the relational expression of P and H described above. In the following, we will discuss ⁇ as an absolute value for easy understanding.
- the transfer master can be produced by directly pressing the transfer master onto a deformable support film.
- a support film formed by a step of providing a deformable undercoat layer on the temporary support film, pressing the transfer pattern directly onto this layer, and a step of curing the undercoat layer as necessary can be used. Heat, light, etc. can also be applied in the pressing process.
- this can be realized by depositing a flat film after forming a reflective film having surface irregularities on a base film or a substrate having a functional film force.
- the surface irregularity is formed on the base film or the substrate that also has a functional film force by the above-described method.
- the surface irregularity is formed by forming a thin film layer such as an energy-sensitive resin layer on the irregular surface of the substrate.
- the active energy line is irradiated to the energy-sensitive resin layer through a patterned mask or by direct drawing, and the exposed or unexposed part of the resin layer is removed with a developer.
- a reflective film is formed. The reflective film is also formed without any particular problem by the above-described method.
- a planarizing film is formed on the reflective film.
- the flattening film can be formed by coating, formed by a bonding method, formed by a transfer method, or the like. In the figure, by pasting Examples and transcription examples are shown together.
- the flattening film is required to be deformed according to the surface irregularity shape on the surface in contact with the surface irregularity shape, and the surface on the opposite side of the surface in contact with the surface irregularity shape must be flat.
- the material is not particularly limited. For example, an organic resin is used.
- a reflective thin film may be formed in advance on the surface of the transfer pattern, and a thin film layer may be laminated, and the reflective film may be formed by transferring the thin film layer to the surface on which the unevenness is to be formed.
- a flattened film consisting of a reflective film and an undercoat layer may be formed.
- polyethylene such as polyethylene and polypropylene, ethylene and butyl acetate, ethylene and acrylate ester, ethylene and ethylene copolymer such as butyl alcohol, polyvinyl chloride, salt butyl and butyl acetate Polymers, Copolymers of vinyl chloride and butyl alcohol, Polyvinylidene chloride, Polystyrene, Styrene copolymers such as styrene and (meth) acrylate, Polybutyltoluene, butyltoluene and (meth) acrylate Such as butyltoluene copolymer, poly (meth) acrylic acid ester, copolymer of (meth) acrylic acid ester such as butyl (meth) acrylate and butyl acetate, cellulose acetate, nitrocellulose, cellophane, etc. Cellulose derivatives, polyamides, polymers Styrene, poly
- a photoinitiator, a monomer having an ethylenic double bond, or the like may be added in advance as necessary in order to cure after forming the uneven surface shape. There is no problem even if the photosensitive type is negative or positive.
- a film that is chemically and thermally stable and can be formed into a sheet or a plate can be used.
- polyolefins such as polyethylene and polypropylene, polyhalogenated beads such as polychlorinated butyl and poly vinylidene chloride, cellulose derivatives such as cellulose acetate, nitrocellulose and cellophane, polyamide, polystyrene and polycarbonate , Polyimide, polyester, aluminum, copper, etc. Metals.
- biaxially stretched polyethylene terephthalate having excellent dimensional stability is particularly preferred.
- a composition containing a deformable organic polymer or an inorganic compound, a force capable of using a metal preferably an organic polymer composition that can be applied onto a film and wound into a film Use.
- dyes, organic pigments, inorganic pigments, powders and composites thereof may be used alone or in combination.
- a photosensitive resin composition and a thermosetting resin composition can also be used.
- the dielectric constant, hardness, refractive index, and spectral transmittance of these thin film layers are not particularly limited.
- a material that has good adhesion to the film and good peelability from the film For example, acrylic resins, polyethylenes such as polyethylene and polypropylene, polyhalogenated vinylols such as polyvinyl chloride and polyvinylidene chloride, cenorelose derivatives such as cenorelose acetate, nitrosanolose and cellophane, polyamides, polystyrene, Polycarbonate, polyimide, polyester, etc. can be used.
- what has photosensitivity can be used. In some cases, it is possible to use a photosensitive resin that can be developed with alkali or the like so that only the portions that require surface irregularities are left and unnecessary portions are removed.
- a resin composition that can be cured by heat or light after the formation of surface irregularities can be used. Furthermore, adhesion with a film can be improved by adding a coupling agent or an adhesion-imparting agent. For the purpose of improving adhesion, an adhesion-imparting agent can be applied to the adhesion surface of the film or thin film layer.
- the alkali-developable resin preferably has an acid value in the range of 20-300 and a weight average molecular weight in the range of 1,500 to 200,000.
- SM polymers styrene monomer and maleic Copolymers with acids or derivatives thereof
- unsaturated monomers having a carboxyl group such as acrylic acid or metatalic acid
- styrene monomers, methyl metatalate, t-butyl metathal are copolymers with monomers such as acrylate, alkyl methacrylate such as hydroxyethyl methacrylate, and alkyl acrylate having the same alkyl group.
- SM copolymer is styrene, ⁇ -methylstyrene, m or p-methoxystyrene, p- Styrene such as tinole styrene, p-hydroxystyrene, 3-hydroxymethyl-4-hydroxy-styrene or its derivatives (styrene monomers) and maleic anhydride, maleic acid, monomethyl maleate, monoethyl maleate, maleic acid Copolymerized with maleic acid derivatives such as monopropyl propyl, monopropyl maleate, n-butyl maleate, mono-iso-butyl maleate, mono-tert-butyl maleate (hereinafter referred to as copolymer (I)) Say).
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP04822207A EP1770415A4 (en) | 2004-07-16 | 2004-12-08 | CAPACITOR FILM, LIQUID CRYSTAL PANEL, REAR LIGHT AND METHOD FOR PRODUCING A CONDENSATE FILM |
KR1020067006179A KR100756576B1 (ko) | 2004-07-16 | 2004-12-08 | 집광막, 액정패널, 백라이트 및 집광막의 제조방법 |
US10/571,543 US7852435B2 (en) | 2004-07-16 | 2004-12-08 | Light-condensing film, liquid-crystal panel and backlight as well as manufacturing process for light-condensing film |
US12/939,407 US8477267B2 (en) | 2004-07-16 | 2010-11-04 | Light-condensing film, liquid-crystal panel and backlight as well as manufacturing process for light-condensing film |
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JP2004-209783 | 2004-07-16 | ||
JP2004209783A JP3826145B2 (ja) | 2004-07-16 | 2004-07-16 | 集光フィルム、液晶パネルおよびバックライト並びに集光フィルムの製造方法 |
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US10571543 A-371-Of-International | 2004-12-08 | ||
US12/939,407 Division US8477267B2 (en) | 2004-07-16 | 2010-11-04 | Light-condensing film, liquid-crystal panel and backlight as well as manufacturing process for light-condensing film |
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WO2006008845A1 true WO2006008845A1 (ja) | 2006-01-26 |
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PCT/JP2004/018250 WO2006008845A1 (ja) | 2004-07-16 | 2004-12-08 | 集光フィルム、液晶パネルおよびバックライト並びに集光フィルムの製造方法 |
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US (2) | US7852435B2 (ja) |
EP (1) | EP1770415A4 (ja) |
JP (1) | JP3826145B2 (ja) |
KR (1) | KR100756576B1 (ja) |
WO (1) | WO2006008845A1 (ja) |
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WO2010100902A1 (ja) * | 2009-03-03 | 2010-09-10 | 三菱レイヨン株式会社 | フィルムの製造方法 |
WO2014199934A1 (ja) * | 2013-06-10 | 2014-12-18 | 富士フイルム株式会社 | 偏光板および偏光板の製造方法ならびに偏光板の製造のための転写材料および転写材料 |
TWI755364B (zh) * | 2015-09-24 | 2022-02-21 | 日商日東電工股份有限公司 | 光學異向性膜之製造方法 |
CN108847454A (zh) * | 2018-04-09 | 2018-11-20 | 复旦大学 | 一种自愈合的可拉伸发光器件及其制备方法 |
CN108847454B (zh) * | 2018-04-09 | 2019-08-09 | 复旦大学 | 一种自愈合的可拉伸发光器件及其制备方法 |
Also Published As
Publication number | Publication date |
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KR100756576B1 (ko) | 2007-09-07 |
EP1770415A4 (en) | 2012-12-19 |
JP2006030621A (ja) | 2006-02-02 |
EP1770415A1 (en) | 2007-04-04 |
KR20060080218A (ko) | 2006-07-07 |
US7852435B2 (en) | 2010-12-14 |
JP3826145B2 (ja) | 2006-09-27 |
US20110126975A1 (en) | 2011-06-02 |
US8477267B2 (en) | 2013-07-02 |
US20060279679A1 (en) | 2006-12-14 |
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