CN101080662A - Liquid crystal panel and liquid crystal display - Google Patents
Liquid crystal panel and liquid crystal display Download PDFInfo
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- CN101080662A CN101080662A CNA2005800428297A CN200580042829A CN101080662A CN 101080662 A CN101080662 A CN 101080662A CN A2005800428297 A CNA2005800428297 A CN A2005800428297A CN 200580042829 A CN200580042829 A CN 200580042829A CN 101080662 A CN101080662 A CN 101080662A
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- Prior art keywords
- liquid crystal
- mentioned
- crystal panel
- pattern
- film
- Prior art date
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 152
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- 239000000463 material Substances 0.000 claims description 15
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- 239000010410 layer Substances 0.000 description 76
- 238000000034 method Methods 0.000 description 49
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Images
Classifications
-
- 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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
-
- 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
-
- 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
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/40—Materials having a particular birefringence, retardation
-
- 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
- G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
- G02F2413/03—Number of plates being 3
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
A liquid crystal panel and a liquid crystal display the color shift of which is significantly improved. The liquid crystal panel comprises a backlight unit emitting polarized light, an optical compensation layer, a first polarizer, a liquid crystal cell, and a second polarizer arranged in this order from the backlight side. Preferably, the Nz coefficient of the optical compensation layer is in the range 1<Nz<3. Preferably, the optical compensation layer is an oriented polymer film the main component of which is cellulose ester or polycarbonate. Preferably, the backlight unit emitting polarized light includes a light source section emitting natural light and a linearly polarized light separating film.
Description
Technical field
The present invention relates to liquid crystal panel and liquid crystal indicator.Say in more detail, the present invention relates to liquid crystal panel and liquid crystal indicator that gamut (color shift) is significantly improved.
Background technology
In the past, in liquid crystal indicator, used the phase-contrast film of optical compensating film conduct in order to the birefringence of compensation liquid crystal cells.(for example, patent documentation 1) is its representative to this type of optical compensating film between liquid crystal cells and the polaroid to be configured in.
Yet,, require further to improve image evenness and display quality along with the height of in recent years liquid crystal indicator becomes more meticulous and multifunction.But, according to above-mentioned liquid crystal indicator in the past, aspect the white demonstration and black display in the representative drive pattern of STN (Super Twisted Nematic) pattern, TN (Twisted Nematic) pattern, IPS (In-Plane Switching) pattern, VA (Vertical Aligned) pattern, OCB (OpticallyAligned Birefringence) pattern, HAN (Hybrid Aligned Nematic) pattern and ASM (Axially Symmetric Aligned Microcell) pattern etc., gamut is very big.More specifically, has the problem that when white shows, has yellow or when black display, have blueness.
Patent documentation 1: the spy opens 2004-78203
Summary of the invention
The present invention be for solve above-mentioned in the past problem and the invention finished, its purpose is, the liquid crystal panel and the liquid crystal indicator that provide gamut significantly to be improved.
Liquid crystal panel of the present invention is to possess backlight portion, optical compensating layer, first polariscope, liquid crystal cells and second polariscope that sends polarized light according to following order from the backlight side.
In preferred embodiment, the Nz coefficient of above-mentioned optical compensating layer is the scope of 1＜Nz＜3.
In preferred embodiment, above-mentioned optical compensating layer is for being the oriented film of the macromolecule membrane of major component with cellulose esters or polycarbonate.
In preferred embodiment, the above-mentioned backlight portion that sends polarized light comprises light source portion and the rectilinearly polarized light separating film that sends natural light.
In preferred embodiment, above-mentioned liquid crystal panel further possesses minus biaxiality optical element between above-mentioned first polariscope and the liquid crystal cells and/or between above-mentioned second polariscope and the liquid crystal cells.
In preferred embodiment, above-mentioned minus biaxiality optical element is formed by at least a non-liquid crystal polymer material of selecting from polyamide, polyimide, polyester, polyetherketone, polyamidoimide and polyester-imide.
In preferred embodiment, the slow axis of above-mentioned optical compensating layer is vertical with the above-mentioned first polariscopic absorption axes.
In preferred embodiment, the drive pattern of above-mentioned liquid crystal cells is selected from the group of being made up of STN pattern, TN pattern, IPS pattern, VA pattern, ocb mode, HAN pattern and ASM pattern.
According to other aspects of the invention, can provide liquid crystal indicator.This liquid crystal indicator comprises above-mentioned liquid crystal panel.
As mentioned above, according to the present invention, in the arranged outside of a polariscope (backlight lateral deviation galvanometer) have an optical compensating layer of certain optical properties.By being combined in the set optical compensating layer in the polariscopic outside, constituting with the backlight portion that sends polarized light with certain optical properties, send the situation of the backlight of natural light with use and compare, can significantly improve gamut.That is, can suppress to make the phenomenon of change color significantly according to watching the angle of liquid crystal panel.Though do not illustrated as yet in theory, infer that in a single day the light that is sent from backlight portion become polarized light after, this polarized light is proofreaied and correct by optical compensating layer, then can realize the color correction of the backlight that is difficult to accomplish by natural light.This type of effect is unexpected excellent results for making the discovery that the specific optical compensating layer and the liquid crystal indicator of the backlight portion combination of sending polarized light are at first learnt.
Description of drawings
Fig. 1 is the summary section of the liquid crystal panel of preferred implementation of the present invention.
Fig. 2 is the summary section of explanation state of orientation of the liquid crystal molecule of liquid crystal layer when liquid crystal indicator of the present invention adopts the liquid crystal cells of VA pattern.
Fig. 3 is the summary section of explanation state of orientation of the liquid crystal molecule of liquid crystal layer when liquid crystal indicator of the present invention adopts the liquid crystal cells of ocb mode.
Fig. 4 is the mode chart that position angle during form and aspect and gamut are measured and polar angle describe.
Fig. 5 is the XY chromatic diagram of expression to the gamut measurement result of the liquid crystal panel of embodiments of the invention.
Fig. 6 is the XY chromatic diagram of expression to the gamut measurement result of the liquid crystal panel of another embodiment of the present invention.
Fig. 7 is the XY chromatic diagram of expression to the gamut measurement result of the liquid crystal panel of other embodiments of the invention.
Fig. 8 is the XY chromatic diagram of expression to the gamut measurement result of the liquid crystal panel of comparative example.
Fig. 9 is the XY chromatic diagram of gamut measurement result of the liquid crystal panel of another comparative example of expression.
Among the figure:
10 backlight portions
11 light source portion
12 rectilinearly polarized light separating films
20 optical compensating layers
30 first polariscopes
40 liquid crystal cells
50 second polariscopes
100 liquid crystal panels
Embodiment
A. liquid crystal panel
Fig. 1 is the summary section of the liquid crystal panel of preferred implementation of the present invention.Liquid crystal panel 100 possesses backlight portion 10, optical compensating layer 20, first polariscope 30, liquid crystal cells 40 and second polariscope 50 that sends polarized light from the backlight side according to following order.That is, in the present invention, in the arranged outside of polariscope 30 have an optical compensating layer 20 (in C item described later, describing in detail) of certain optical properties about optical compensating layer 20.Optical compensating layer by being combined in polariscopic arranged outside, constitute, send the situation of the backlight of natural light with use and compare, can significantly improve gamut with the backlight portion that sends polarized light with certain optical properties.That is, can suppress to make the phenomenon of change color significantly according to watching the angle of liquid crystal panel.
Preferred liquid crystal panel 100 further possesses minus biaxiality optical element 60 between first polariscope 30 and liquid crystal cells 40, and/or, between second polariscope 50 and liquid crystal cells 40, further possess minus biaxiality optical element 70.And then, when reality is used, can be at first polariscope 30 and second polariscope 50 one-sided at least, suitable arbitrarily protective film (not shown) is set.
As the drive pattern of liquid crystal cells 40,, then can adopt suitable drive pattern arbitrarily as long as can obtain effect of the present invention.As the object lesson of drive pattern, can enumerate STN (SuperTwisted Nematic) pattern, TN (Twisted Nematic) pattern, IPS (In-Plane Switching) pattern, VA (Vertical Aligned) pattern, OCB (Optically Aligned Birefringence) pattern, HAN (Hybrid Aligned Nematic) pattern and ASM (Axially Symmetric AlignedMicrocell) pattern.Preferred VA pattern and ocb mode.This is because by used backlight portion 10 and the optical compensating layer 20 of combination the present invention, can significantly improve gamut.
Fig. 2 is the summary section of the state of orientation of liquid crystal molecule in the explanation VA pattern.Shown in Fig. 2 (a), when not applying voltage, liquid crystal molecule is vertical orientated on 41,42 of substrates.Like this vertical orientated can be by between the substrate that is formed with vertical alignment layer (not shown), and configuration has the anisotropic nematic crystal of negative permittivity and realizes.Under such state, when from the face incident ray of a substrate 41, the rectilinearly polarized light light that is incident to liquid crystal layer 43 by first polariscope 30 advances along the long axis direction of vertical orientated liquid crystal molecule.On the long axis direction of liquid crystal molecule birefringence does not take place, so incident light does not change the polarized light orientation and advances, second polariscope 50 that is had with the polarizing axis of first polariscope, 30 quadratures absorbs.When not applying voltage, obtain the demonstration (normal black mode) of dark state thus.Shown in Fig. 2 (b), when applying voltage between electrode, then the major axis of liquid crystal molecule and real estate are parallel-oriented.With respect to the rectilinearly polarized light light to liquid crystal layer 43 incidents of this state, liquid crystal molecule demonstrates birefringence, and the polarization of incident light light state changes according to the slope of liquid crystal molecule.When applying the maximum voltage of regulation, the light by liquid crystal layer becomes for example rectilinearly polarized light of its polarisation orientation half-twist, obtains the demonstration of bright state so see through second polariscope 50.If making no-voltage once again applies state, then can revert to the demonstration of dark state by the orientation constraining force.In addition, apply voltage by order and change and control the slope of liquid crystal molecule, and order changes and can carry out gray shade scale and show from the light intensity that sees through of second polariscope 50.
Fig. 3 is the summary section of the state of orientation of liquid crystal molecule in the explanation ocb mode.Ocb mode is the drive pattern that constitutes liquid crystal layer 43 with the orientation of so-called curved orientation.So-called curved orientation, shown in Fig. 3 (c), the orientation of nematic crystal molecule is near substrate, has approximately parallel angle (angle of orientation), the angle of orientation is for along with the center towards liquid crystal layer presents vertical angle with respect to base plan, change continuously one by one along with being as the orientation with the substrate surface of subtend, and all do not have the state of orientation of torsion structure at liquid crystal layer away from the liquid crystal layer center.This type of curved orientation is to form through following processing.Shown in Fig. 3 (a), under the state (original state) of not giving any electric field etc., liquid crystal molecule is for presenting even orientation in fact.But, with regard to liquid crystal molecule, have pre-tilt angle, and near the pre-tilt angle the substrate with the substrate of its subtend near pre-tilt angle different.If (representationally be 1.5V～1.9V) (when applying low-voltage), be orientated (spray alignment), then can realize the transfer of the past curved orientation shown in Fig. 3 (c) through the injection as Fig. 3 (b) shown in the bias voltage that applies regulation herein.If (representational is 5V～7V) (when applying high voltage), and then shown in Fig. 3 (d), liquid crystal molecule system is about standing upright with respect to substrate surface to apply display voltage again by the curved orientation state.In the display mode of normal white, by first polariscope 30, and the light that is incident to the liquid crystal layer of Fig. 3 (d) state when applying high voltage do not change the polarisation orientation and advances, and absorbed by second polariscope 50.Therefore, present the demonstration of dark state.If display voltage descends, then by the orientation constraining force of friction treatment, extensive back becomes curved orientation, and can revert to the demonstration of bright state.In addition, make the inclination of display voltage variation, and make, then can carry out gray shade scale and show from the polariscopic intensity variation that sees through with the control liquid crystal molecule.In addition, the liquid crystal indicator that possesses the liquid crystal cells of ocb mode, can carry out converting to the phase transfer of curved orientation state with very high speed by the injection state of orientation, so compare with the liquid crystal indicator of other drive patterns such as TN pattern or IPS pattern, have the feature of animation display characteristic good.
The display mode of the liquid crystal cells of above-mentioned ocb mode also can use the normal white pattern that presents dark state (black display) when applying high voltage or present any pattern of the normal black mode of bright state (white shows) when applying high voltage.
The unit interval of the liquid crystal cells of above-mentioned ocb mode is preferably 2 μ m～10 μ m, and more preferably 3 μ m～9 μ m are preferably 4 μ m～8 μ m especially.If in the above-mentioned scope, then can shorten response time, can obtain good display characteristic.
Employed nematic crystal in the liquid crystal cells of above-mentioned ocb mode, being preferably and using dielectric constant anisotropy is positive person.As dielectric constant anisotropy is the object lesson of positive nematic crystal, can enumerate the spy and open the liquid crystal of putting down in writing in the flat 9-176645 communique.In addition, but also former state use commercially available nematic crystal.As commercially available nematic crystal, for example can enumerate Merck corporate system trade name " ZLI-4535 " and trade name " ZLI-1132 " etc.The ordinary light refractive index (no) of above-mentioned nematic crystal is poor with unusual optical index (ne), i.e. birefraction (Δ n
LC) suitably select according to the answer speed of above-mentioned liquid crystal or transmitance etc., be preferably 0.05～0.30, more preferably 0.10～0.30, be preferably 0.12～0.30 again.In addition, the pre-tilt angle of this type of nematic crystal is preferably 1 °～10 °, more preferably 2 °～8 °, is preferably 3 °～6 ° especially.If in the above-mentioned scope, then can shorten response time, and can obtain good display characteristic.
Aforesaid liquid crystal panel is suitable for liquid crystal indicators such as personal computer, LCD TV, mobile phone, portable information terminal (PDA), projector.
B. backlight portion
As mentioned above, backlight portion 10 is for sending polarized light.Preferred backlight portion 10 sends rectilinearly polarized light.By proofreading and correct polarized lights (preferred rectilinearly polarized light) with optical compensating layer 20, the backlight that then can carry out natural light is difficult to the correction of the backlight intrinsic colour that carries out, and its result can significantly improve the gamut of liquid crystal panel.In the present invention, backlight portion can only be made of the light source that sends polarized light, can also make up the light source portion of sending natural light and polarized light mechanism and constitutes.As shown in Figure 1, in one embodiment, backlight portion 10 comprises light source portion 11 and the rectilinearly polarized light separating film 12 that sends natural light.Constitute according to this type of, then all can obtain easily because of any one of light source and rectilinearly polarized light separating film, thus very practical, so preferably.And then, according to this type of formation, can omit λ/4 plates, so contribution is arranged for the slimming of liquid crystal panel.
The above-mentioned light source portion 11 of sending natural light is made by the light source portion and the light pervasion component of combination point-like or wire usually.As light source portion, can adopt suitable formation arbitrarily.As the representation example of light source portion, can enumerate the downward back light modulation and edge light (edge light) the formula backlight of transmission type liquid crystal display device.The downward back light modulation is for being made of linear light source (typical example is a fluorescent light) and reflecting plate that is disposed at this linear light source rear and the light diffuser plate (for example, opaque plate) that is disposed in this linear light source the place ahead.The edge-lit backlight is known compares easier slimming with the downward back light modulation, and can be used as the good area source of brightness uniformity.In the edge-lit backlight, dispose linear light source (typical example is a fluorescent light) in the end of light conductor (for example, acrylic block).In the edge-lit backlight, for example form diffusion layer in the one side of light conductor, and according to being configured from the mode that the demand side of light conductor penetrates from the light of light source.In light conductor, as positive (light emergence face) face in addition, the plate that is reflected covers.In order to make brightness uniformity, according to the distance (Luminance Distribution) of distance light source, for example to the diffusion effect of diffusion layer gradient distribution in addition.In order to obtain sufficient illuminated area brightness, by the method for overlapping diffuser plate on the light conductor of back side being implemented Fresenl mirror (Fresnel mirrors) processing, with light conductor and the overlapping gimmicks such as method of prism of implementing Fresnel processing, use the correlation bright dipping and give directive property.
As above-mentioned rectilinearly polarized light separating film 12, can adopt the suitable film arbitrarily of isolating rectilinearly polarized light from natural light or polarized light.As the representation example of such rectilinearly polarized light separating film, can enumerate the grid type polariscope, to have the multilayer film lamilated body more than two layers that material was constituted more than two kinds of refringence, used different evaporation multilayer film of refractive index in the beam splitter etc., to have the birefringent layers multilayer film lamilated body more than two layers that material was constituted more than two kinds of refractive index, use had the film that the resin multilayer body more than two layers of the resin more than two kinds of refractive index is stretched and forms, with with the direction of principal axis of rectilinearly polarized light quadrature on film that its reflection/see through is separated etc.For example, (for example can use the material that will show phase differential by stretching, PEN, polyethylene terephthalate, polycarbonate) or acrylic resin is (for example, polymethylmethacrylate), the multilayer laminate that gives alternately laminated with the few resin (for example, the norbornene resin of Arton of JSR corporate system and so on) of phase differential performance amount carries out the resulting film of uniaxial tension.The rectilinearly polarized light separating film is for example as the trade name DBEF of 3M corporate system and on sale on the market.The thickness of cathetus polarized light separating film of the present invention is representative about with 50～200 μ m.
C. optical compensating layer
In the pellicular front of optical compensating layer 20 phase differential (front phase differential) Re can be corresponding the formation of backlight portion and optimization.For example, phase differential Re is preferably 50～400nm in the face, and more preferably 100～350nm most preferably is 140～320nm.In addition, phase differential Re is obtained by formula: Re=(nx-ny) * d in the face.Herein, nx is the refractive index of the slow-axis direction of optical compensating layer, and ny is the refractive index of the quick shaft direction of optical compensating layer, and d (nm) is the thickness of optical compensating layer.As representative example, Re uses the light of wavelength 590nm to measure.Slow axis is meant that the refractive index in the pellicular front is maximum direction, and fast axle is meant in face the direction perpendicular to slow axis.
The thickness direction phase differential Rth of optical compensating layer 20 can also be corresponding the formation of backlight portion and optimization.For example, thickness direction phase differential Rth be preferably 25～800nm, more preferably 50～600nm, most preferably be 180～480nm.In addition, thickness direction phase differential Rth is obtained by formula: Rth=(nx-nz) * d.Herein, nz is the refractive index of the thickness direction of film (optical compensating layer).As representative example, Rth can also use the light of wavelength 590nm to measure.
The Nz coefficient of optical compensating layer 20 (=Rth/Re) can also be corresponding the formation of backlight portion and optimization.In the present invention, the Nz coefficient is preferably the scope of 1＜Nz＜3, and more preferably the scope of 1＜Nz＜2 is preferably 1.1～1.7 especially, most preferably is 1.4～1.7.In addition, optical compensating layer 20 is for having the index distribution of nx＞ny＞nz.By having this type of optical characteristics (that is, Re, Rth, index distribution and Nz coefficient; Nz coefficient particularly) optical compensating layer, is used in combination, then can proofreaies and correct the color of backlight light source itself admirably with aforesaid backlight portion.More specifically, even itself have yellow or have under the blue situation, can also pass through combination optical layer of compensation and rectilinearly polarized light separating film, and be transformed into white at the backlight light source.Its result can obtain the minimum liquid crystal panel of gamut (liquid crystal indicator).
As long as optical compensating layer 20 has effect of the present invention, just can be individual layer or the lamilated body more than two layers.Under the situation that is lamilated body,, then can suitably set material of each layer of formation and the thickness of each layer as long as lamilated body all has aforesaid optical characteristics.
As long as the thickness of optical compensating layer can be reached effect of the present invention (as long as for example can obtain aforesaid optical characteristics), then can adopt suitable thickness arbitrarily.The thickness of optical compensating layer is preferably 20～80 μ m, and more preferably 30～70 μ m are preferably 35～65 μ m especially, most preferably are 38～60 μ m.
With regard to optical compensating layer, as long as can obtain aforesaid optical characteristics, then can use suitable material arbitrarily, and form with suitable arbitrarily method.Optical compensating layer is to be representative with thermoplastic resin as the oriented film of the macromolecule membrane of major component.As thermoplastic resin, can adopt suitable thermoplastic resin arbitrarily according to purpose.As the object lesson of thermoplastic resin, can enumerate common plasticses such as tygon, polypropylene, polynorbornene, Polyvinylchloride, cellulose esters, polystyrene, ABS resin, AS resin, polymethylmethacrylate, polyvinyl acetate, Vingon; Engineering plastics commonly used such as polyamide, polyacetal, polycarbonate, Noryl, polybutylene terephthalate, polyethylene terephthalate; Super engineering plastics such as polyphenylene sulfide, polysulfones, polyethersulfone, polyetheretherketone, polyarylate, liquid crystal polymer, polyamidoimide, polyimide, teflon etc.These thermoplastic resins can also carry out after the arbitrarily suitable polymer modification for use.As the object lesson of polymer modification, can enumerate copolymerization, branch, crosslinked, molecule terminal, and modification such as legislate.Above-mentioned thermoplastic resin may be used alone, can also be used in combination more than two kinds.With cellulose esters and polycarbonate for preferred especially.If use cellulose esters, then can obtain expression power, the phase difference value of the transparency, physical strength, thermostability, covering property of moisture, phase difference value the control easness, with good optical compensating layer such as polariscopic cementability.The excellent processability of polycarbonate.
As above-mentioned cellulose esters, can adopt suitable cellulose esters arbitrarily.As object lesson, can enumerate organic acid esters such as cellulose ethanoate, cellulose propionate, cellulose butylate.In addition, above-mentioned cellulose esters for example can be the mixed organic acid ester that cellulosic a part of hydroxyl is replaced by acetyl group and another part is replaced by propiono.It is manufactured that above-mentioned cellulose esters is for example opened the method for putting down in writing in 2001-188128 communique [0040]～[0041] by the spy.
In above-mentioned cellulose esters, also preferably contain the cellulose esters of the repetitive shown in the following general formula (A).This be because, the wavelength dispersion characteristic good of phase difference value, and easily show phase difference value.
[changing 1]
In formula, R
1～R
3Independent respectively, be acetyl group or propiono, n is the integer more than 1.
Comprise at above-mentioned cellulose esters under the situation of acetyl group, its degree of substitution with acetyl group is preferably 1.5～3.5, and more preferably 2.0～3.0, most preferably be 2.4～2.9.Comprise at above-mentioned cellulose esters under the situation of propiono, its propiono degree of substitution is preferably 0.5～3.5, and more preferably 0.5～2.0, most preferably be 0.5～1.5.In addition; at above-mentioned cellulose esters is under the situation of the mixed organic acid ester that cellulosic a part of hydroxyl is replaced by acetyl group and another part is replaced by propiono, and the total of degree of substitution with acetyl group and propiono degree of substitution is preferably 1.5～3.5, more preferably 2.0～3.0, most preferably is 2.4～2.9.At this moment, degree of substitution with acetyl group is preferably 1.0～2.8, the propiono degree of substitution is preferably 0.5～2.0.
In addition, in this manual, so-called degree of substitution with acetyl group (or propiono degree of substitution), the 2nd, 3,6 quantity that the hydroxyl that carbon connected is replaced by acetyl group (or propiono) in the expression cellulose skeleton.Can be in cellulose skeleton any carbon of the 2nd, 3,6 unevenly have acetyl group (or propiono), can also on average exist.Above-mentioned degree of substitution with acetyl group can be obtained according to ASTM-D817-91 (test method(s)s of cellulose ethanoate etc.).In addition, above-mentioned propiono degree of substitution can be obtained according to ASTM-D817-96 (test method(s)s of cellulose ethanoate etc.).
With regard to above-mentioned cellulose esters, it utilizes the weight-average molecular weight of measuring based on gel permeation chromatography (GPC) method of tetrahydrofuran solvent (Mw) to be preferably 30,000～500,000, and more preferably 50,000～400,000, most preferably be 80,000～300,000.If the scope that weight-average molecular weight is above-mentioned, then physical strength is good, and the operability of dissolubility, formability, curtain coating is good.
As above-mentioned polycarbonate, the aromatic copolycarbonate that preferably uses aromatic dicarboxylic phenol composition to become branch to constitute with carbonic ester.Aromatic copolycarbonate can obtain by the reaction of aromatic dicarboxylic phenolic compounds and carbonate precursor usually.That is, can utilize and be blown into the phosgenation of phosgene or in the presence of catalyzer, make aromatic dicarboxylic phenolic compounds and two aryl carbonates carry out the ester-interchange method of transesterification and obtain to the aromatic dicarboxylic phenolic compounds in the presence of caustic alkali and the solvent.Herein, object lesson as carbonate precursor, can enumerate bischloroformates, diphenyl carbonate, two-right-tolyl carbonic ester, phenyl-right-tolyl carbonic ester, two-right-chlorphenyl carbonic ester, dinaphthyl carbonic ester of phosgene, above-mentioned dihydric phenols etc., serve as preferred with phosgene, diphenyl carbonate also wherein.
Object lesson as the aromatic dicarboxylic phenolic compounds that reacts with above-mentioned carbonate precursor, can enumerate 2, two (4-hydroxyphenyl) propane, 2 of 2-, two (the 4-hydroxyls-3 of 2-, the 5-3,5-dimethylphenyl) propane, two (4-hydroxyphenyl) methane, 1, two (4-hydroxyphenyl) ethane, 2 of 1-, two (4-hydroxyphenyl) butane, 2 of 2-, two (4-hydroxyl-3, the 5-3,5-dimethylphenyl) butane, 2 of 2-, two (the 4-hydroxyls-3 of 2-, 5-dipropyl phenyl) propane, 1, two (4-hydroxyphenyl) cyclohexanes, 1 of 1-, two (the 4-hydroxyphenyl)-3 of 1-, 3,5-trimethyl-cyclohexane etc.They can use separately, can also be used in combination more than two kinds.Preferred use 2, two (4-hydroxyphenyl) propane, 1 of 2-, two (4-hydroxyphenyl) cyclohexanes, 1 of 1-, two (the 4-hydroxyphenyl)-3,3 of 1-, 5-trimethyl-cyclohexane.Especially with and with 2, two (4-hydroxyphenyl) propane and 1 of 2-, 1-pair of (4-hydroxyphenyl)-3,3, the 5-trimethyl-cyclohexane is preferred.
And with 2, two (4-hydroxyphenyl) propane and 1 of 2-, two (the 4-hydroxyphenyl)-3,3 of 1-, the 5-trimethyl-cyclohexane is as the polycarbonate of aromatic dicarboxylic phenolic compounds, comprises the repetitive of following formula (B) shown in reaching (C).
[changing 2]
And with 2, two (4-hydroxyphenyl) propane and 1 of 2-, 1-pair of (4-hydroxyphenyl)-3,3, the 5-trimethyl-cyclohexane by changing both usage ratios, then can be adjusted the Tg or the photoelastic coefficient of resulting optical compensating layer during as the aromatic dicarboxylic phenolic compounds.For example, if improve 1 in the polycarbonate, two (the 4-hydroxyphenyl)-3,3 of 1-, the containing ratio of 5-trimethyl-cyclohexane then can improve Tg, and reduces photoelastic coefficient.In the polycarbonate 2, two (4-hydroxyphenyl) propane and 1 of 2-, two (the 4-hydroxyphenyl)-3,3 of 1-, the weight ratio of 5-trimethyl-cyclohexane is preferably 2: 8～8: 2, and more preferably 3: 7～6: 4, be preferably 3: 7～5: 5 especially, most preferably be 4: 6.By with such weight ratio and usefulness, can obtain having and to obtain the Tg of good permanance, self-supportive and stretchability and the optical compensating layer of rigidity.
When the aromatic dicarboxylic phenolic compounds that uses more than two kinds, the weight ratio of each aromatic dicarboxylic phenolic compounds composition can be passed through
1The H-NMR measurement is obtained.
The weight-average molecular weight of above-mentioned polycarbonate (Mw) according to the GPC method measured polystyrene conversion of tetrahydrofuran as the expansion solvent, is preferably 25,000～200,000, more preferably 30,000～150,000, be preferably 40,000～100 especially, 000, most preferably be 50,000～80,000.By the weight-average molecular weight that makes polycarbonate is above-mentioned scope, then can obtain the good optical compensating layer of physical strength.
With the macromolecule membrane of above-mentioned thermoplastic resin, can further contain any proper additive as required as major component.As the object lesson of adjuvant, can enumerate plastifier, thermal stabilizer, light stabilizer, lubricant, antioxidant, ultraviolet light absorber, fire retardant, colorant, antistatic agent, appearanceization agent mutually, crosslinking chemical, reach tackifier etc.The kind of employed adjuvant and amount can suitably be set according to purpose.As representative example, the use amount of adjuvant is below 0.1～10 (weight ratio) with respect to the total solid composition 100 of this macromolecule membrane.
As obtaining with above-mentioned thermoplastic resin is the method for the macromolecule membrane of major component, can use suitable shaping processing method arbitrarily.As the object lesson of shaping processing method, can enumerate compression forming method, transfer moudling, injection molding method, extruding formation method, blow moulding, FRP forming process and solvent casting method etc.In these methods, preferably use extruding formation method or solvent casting method.This is because can improve the flatness of the optical compensating layer that obtains, and can obtain the good optical homogeneity.More specifically, above-mentioned extruding formation method is that the resin combination that will contain thermoplastic resin as major component, plastifier, adjuvant etc. is heated as aqueous, and it being expressed into the casting roll surface with film like by T mould etc., cooling is also made the method for film.In addition, above-mentioned solvent casting method is that the resin combination that will contain thermoplastic resin as major component, plastifier, adjuvant etc. is dissolved in the strong solution (dope) that solvent obtains and gives deaeration, and ring stainless steel just band or going barrel surface evenly curtain coating become film like, make solvent evaporation to make the method for film.In addition, molding condition can suitably be selected according to the composition of used resin or kind, shaping processing method etc.
As the preparation method of oriented film that with above-mentioned thermoplastic resin is the macromolecule membrane of major component, can adopt suitable drawing process arbitrarily.As object lesson, can enumerate vertical single ax pulling method, horizontal uniaxial tension method, biaxial stretch-formed method, biaxial stretch-formed method etc. one by one in length and breadth simultaneously in length and breadth.These stretchings can be the free end pulling methods, can also be the stiff end pulling methods.As drawing mechanism, can use appropriate arbitrarily drawing machines such as roller drawing machine, expanding drawing machine and biaxial stretch-formed machine.While heating under the situation about stretching, temperature is changed continuously, can also make its phasic Chang.In addition, stretching process can be divided into more than the secondary.Preferred vertical single ax pulling method or the horizontal uniaxial tension method used.This is because these pulling methods can obtain the little phase-contrast film of slow axis deviation on the thin-film width direction.And then the vertical single ax pulling method is suitable for improving the uniaxiality (direction of orientation that easily makes molecule is a direction) of molecule, so have feature as described below: even use the material that is difficult to produce phase difference value, can also obtain big phase difference value.In addition, so horizontal uniaxial tension method can roller be made according to the slow axis that makes optical compensating layer and polariscopic absorption axes is that the lamilated body that mutually orthogonal mode is fitted with optical compensating layer and polariscope stickup has the feature that can significantly boost productivity.
Temperature (also being called draft temperature) in stretching baking oven when above-mentioned macromolecule membrane is stretched is preferred for the glass temperature (Tg) of this macromolecule membrane is above.This be because, phase difference value is easy to present on the Width evenly, in addition, film is difficult to crystallization (gonorrhoea).Above-mentioned draft temperature is preferably Tg+1 ℃～Tg+30 ℃.Particularly, draft temperature is preferably 110～200 ℃, more preferably 120～170 ℃.In addition, glass temperature can be obtained with the DSC method based on JISK7121-1987.
About the temperature in the above-mentioned stretching baking oven is kept certain concrete grammar, there is no particular restriction, the heating means or temperature-controlled process of heated roller, heat pipe roller or the metal tape etc. that can use from hot blast or cold wind round-robin air circulating type constant temperature baking oven, the well heater that utilizes microwave or far infrared etc., adjustment, select suitably suitable method.
Stretching ratio when above-mentioned macromolecule membrane is stretched can suitably be set according to the residual quantity of the kind of the composition of this macromolecule membrane, volatile ingredient etc., volatile ingredient etc., the phase difference value of design etc.For example, stretching ratio is preferably 1.05～2.00 times, more preferably 1.10～1.80 times.In addition, the transfer rate when stretching is not particularly limited, but from the mechanical precision of stretching device, stability etc., is preferably 0.5～20m/ minute.
D. polariscope
In this manual, so-called " polariscope " is meant by natural light or polarized light and is transformed into the film of polarized light arbitrarily.As above-mentioned first polariscope 30 and second polariscope 50, can adopt appropriate polariscope arbitrarily according to purpose.In addition, first polariscope 30 can be identical with second polariscope 50, also can have nothing in common with each other.As polariscopic object lesson, can enumerate and make polyvinyl alcohol film, part formalizing polyvinyl alcohol film, vinyl-vinyl acetate copolymer pastern divide dichroic substance such as hydrophilic macromolecule thin film adsorbs iodine such as saponification film or dichroic dye and the person that gives the uniaxial tension, polyenes such as the desalination acid treatment thing of the processed thing of polyvinyl alcohol (PVA) or Polyvinylchloride are oriented film etc.Wherein, just make dichroic substance such as polyvinyl alcohol film absorption iodine and give with regard to the polariscope of uniaxial tension, so its polarisation dichroic ratio height is preferred especially.
Make polyvinyl alcohol film absorption iodine and give the polariscope of uniaxial tension, for example polyvinyl alcohol (PVA) can be impregnated in the aqueous solution of iodine and be dyeed, and be drawn into 3～7 times of raw footage and make.Boric acid or zinc sulfate, zinc chloride etc. can also be contained as required, aqueous solution such as potassium iodide can also be impregnated in.And then, can be as required before dyeing, polyvinyl alcohol film be impregnated in the water and wash.With the polyvinyl alcohol film washing, not only can clean the dirt or the anti blocking agent on polyvinyl alcohol film surface, also have the uneven effects such as stain that prevent that the polyvinyl alcohol film swelling from being caused.Stretching can be carried out after with iodine staining, on one side also can stretch by an Edge Coloring, can also dye with iodine after stretching.Can also or stretch in the water-bath in the aqueous solution of boric acid and potassium iodide etc.
With regard to above-mentioned polariscopic transmitance, its 23 ℃ down with the measured values of light of wavelength 440nm, be preferably 41%～45%, more preferably 43%～45%.
Above-mentioned polariscopic degree of polarization is preferably 99.90%～100%, and more preferably 99.95%～100%.If above-mentioned scope then when being used for liquid crystal indicator, can further improve the contrast of frontal.Above-mentioned degree of polarization can use spectrophotometer (color technical institute (strain) system in the village, ProductName " DOT-3 ") to measure.
Above-mentioned polariscopic thickness can be considered the convenience that optical characteristics, physical strength such as degree of polarization etc. are made etc. and suitably select.This thickness is preferably 1 μ m～80 μ m, and more preferably 10 μ m～50 μ m are preferably 20 μ m～40 μ m especially.If above-mentioned scope, then the slimming to liquid crystal indicator has contribution.
E. polariscopic protective film
As mentioned above, in practicality, can be at the one-sided at least protective film that is provided with of first polariscope 30 and second polariscope 50.By protective film is set, can prevent polariscopic deterioration.As protective film, can adopt appropriate protective film arbitrarily.As the material that constitutes protective film, for example can enumerate good thermoplastic resins such as the transparency, physical strength, thermostability, moisture barrier, isotropy.As the object lesson of this kind thermoplastic resin, can enumerate triacetyl cellulose acetate resins, vibrin, polyethersulfone resin, polysulfone resin, polycarbonate resin, polyamide, polyimide resin, polyolefin resin, acrylic resin, polynorbornene resin, celluosic resin, polyarylate resin, polystyrene resin, polyvinyl alcohol resin, polyacrylic resin and their potpourris such as (TAC).In addition, can also use heat-curing resin or ultraviolet curing resins such as acrylic acid series, carbamate system, propenoic methyl carbamate system, epoxy system, silicone-based.From the viewpoint of polarized light property and permanance, preferred surface is given the TAC film that saponification is handled by alkali etc.
And then for example, what the spy opened that 2001-343529 communique (No. 01/37007, WO) put down in writing can also be used as protective film by the formed thin polymer film of resin combination.In more detail, be side chain have substituted imido or not substituted imido thermoplastic resin, have the potpourri of the thermoplastic resin of substituted-phenyl or non-substituted-phenyl and cyano group with side chain.As object lesson, can enumerate and have the alternating copolymer that isobutylene and N-methylene maleimide constituted and the resin combination of acrylonitritrile-styrene resin.For example, can use the extrusion molding thing of this based resin composition.
Above-mentioned protective film is preferably transparent and does not have painted.Particularly, the phase differential Rth of the thickness direction of protective film is preferably-90nm～+ 75nm, more preferably-80nm～+ 60nm, most preferably be-70nm～+ 45nm.If this scope of phase differential Rth of the thickness direction of protective film then can be removed the polariscopic optical clouration that is caused by protective film.
The thickness of above-mentioned protective film can suitably be set according to purpose.With regard to the thickness of protective film, as representative example, be below the 500 μ m, be preferably 5～300 μ m, more preferably 5～150 μ m.
F. minus biaxiality optical element
As mentioned above, as required, between the liquid crystal cells 40 and first polariscope 30, minus biaxiality optical element 60 is set, between the liquid crystal cells 40 and second polariscope 50, minus biaxiality optical element 70 is set.Minus biaxiality optical element 60 and 70 can be identical, also can have nothing in common with each other.In addition, wherein, in this manual, so-called " minus biaxiality optical element " is meant to have nX＞ny＞optical element of the index distribution of nz.Minus biaxiality optical element 60 and 70 optical characteristics can suitably be set according to the drive pattern of liquid crystal cells.For example, adopt at liquid crystal indicator (liquid crystal cells) under the situation of VA pattern, phase differential is preferably 5～150nm in the face of minus biaxiality optical element, and more preferably 10～100nm most preferably is 15～80nm.In addition, for example, adopt at liquid crystal indicator under the situation of ocb mode, phase differential is preferably 5～400nm in the face of minus biaxiality optical element, and more preferably 10～300nm most preferably is 15～200nm.
The phase differential of the thickness direction of minus biaxiality optical element can also suitably be set according to the drive pattern of liquid crystal cells.For example, adopt at liquid crystal indicator (liquid crystal cells) under the situation of VA pattern, the phase differential of the thickness direction of minus biaxiality optical element is preferably 100～300nm, and more preferably 120～280nm most preferably is 150～260nm.In addition, for example, adopt at liquid crystal indicator under the situation of ocb mode, the phase differential of the thickness direction of minus biaxiality optical element is preferably 100～1000nm, and more preferably 120～500nm most preferably is 150～400nm.
The Nz coefficient of minus biaxiality optical element can also suitably be set according to the drive pattern of liquid crystal cells.For example, adopt at liquid crystal indicator under the situation of VA pattern, the Nz coefficient is preferably 2～10, and more preferably 2～8, most preferably be 2～6.In addition, for example, adopt at liquid crystal indicator under the situation of ocb mode, the Nz coefficient is preferably 2～20, and more preferably 2～10, most preferably be 2～8.
As the thickness of minus biaxiality optical element 60 and 70,, then can adopt appropriate arbitrarily thickness as long as satisfy aforesaid optical characteristics.As representative example, minus biaxiality optical element 60 and 70 thickness are 0.1～50 μ m, are preferably 0.5～30 μ m, more preferably 1～20 μ m.This is because it helps the slimming of liquid crystal indicator, and can obtain view angle compensation function admirable and the uniform optical element of phase differential.Minus biaxiality optical element 60 and 70 thickness can be identical, also can be different.
Material as constituting minus biaxiality optical element as long as can obtain aforesaid optical characteristics, then can adopt appropriate arbitrarily material.For example, as this type of material, can enumerate non-liquid crystal liquid crystal property material.Be preferably non-liquid-crystalline polymer especially.This type of non-liquid crystal liquid crystal property material is different with the liquid crystal liquid crystal property material, and is irrelevant with the orientation of substrate, can form the film of a property of optics that shows so-called nx＞nz, ny＞nz by itself character.Its result not only can use orientation substrate, and can also use non-oriented substrate.And then, even under the situation of using non-oriented substrate, can also omit to the operation of its surface coated alignment films or the operation that alignment films is laminated etc.
As above-mentioned non-liquid-crystalline polymer, for example, owing to thermotolerance, resistance to chemical reagents, transparent good, and rigidity is also abundant, so polymkeric substance such as preferred polyamide, polyimide, polyester, polyetherketone, polyamidoimide, polyester-imides.These can use any separately, for example, as the potpourri of PAEK and polyamide, can be used as the potpourri more than two kinds with different functional groups and use.In this kind polymkeric substance, owing to have high transparent, high orientation, high stretch, so preferred especially polyimide.
There is no particular restriction to the molecular weight of above-mentioned polymkeric substance, and for example preferable weight-average molecular weight (Mw) is in 1000～1000000 scope, more preferably 2000～500000 scope.
As above-mentioned polyimide, orientation height in for example preferred face, can be dissolved in the polyimide of organic solvent.Particularly, for example, can use special table 2000-511296 communique disclosed, contain 9, the polycondensation product of two (aminoaryl) fluorenes of 9-and aromatic tetracarboxylic acid's dianhydride and contain the polymkeric substance of the repetitive of representing with following formula (1) more than.
[changing 3]
In above-mentioned formula (1), R
3～R
6Respectively independent, be from hydrogen, halogen, phenyl, by 1～4 halogen atom or C
1～C
10Phenyl that alkyl replaced and C
1～C
10At least a substituting group of selecting in the group that alkyl constituted.Preferred R
3～R
6Respectively independent, be from halogen, phenyl, by 1～4 halogen atom or C
1～C
10Phenyl that alkyl replaced and C
1～C
10At least a substituting group of selecting in the group that alkyl constituted.
In above-mentioned formula (1), Z for example is C
6～C
20The quaternary aromatic group, be preferably the derivant of pyromellitic acid base, polycycle aromatic group, polycycle aromatic group or the group shown in the following formula (2).
[changing 4]
In above-mentioned formula (2), Z ' for example is covalent bond, C (R
7)
2Base, basic, the O atom of CO, S atom, SO
2Base, Si (C
2H
5)
2Base or NR
8Base is being under a plurality of situation, can be identical or different respectively.In addition, w represents 1 to 10 integer.R
7Independent respectively is hydrogen or C (R
9)
3R
8For hydrogen, carbon number are 1～about 20 alkyl or C
6～C
20Aryl is being under a plurality of situation, can be identical or different respectively.R
9Independent respectively is hydrogen, fluorine or chlorine.
As above-mentioned polycycle aromatic group, for example can enumerate the quaternary group of deriving by naphthalene, fluorenes, benzofluorene or anthracene.In addition, as the substitutive derivative of above-mentioned polycycle aromatic group, for example can enumerate by from C
1～C
10The above-mentioned polycycle aromatic group of selecting in the group that alkyl, its fluorinated derivatives and halogens such as F or Cl are formed that at least one group replaced.
In addition, for example can also enumerate that the flat 8-511812 communique of special table is put down in writing, repetitive is that homopolymer shown in following general formula (3) or (4) or repetitive are the polyimide shown in the following general formula (5).In addition, the polyimide of following formula (5) is the preferred configuration of the homopolymer of following formula (3).
[changing 5]
[changing 6]
[changing 7]
In above-mentioned general formula (3)～(5), G and G ' are independent respectively, for example are from covalent bond, CH
2Base, C (CH
3)
2Base, C (CF
3)
2Base, C (CX
3)
2Base (herein, X is a halogen), CO base, O atom, S atom, SO
2Base, Si (CH
2CH
3)
2Base and N (CH
3) group selected in the group formed of base, can be identical or different respectively.
In above-mentioned formula (3) and formula (5), L is a substituting group, and d and e represent that it replaces number.L for example is halogen, C
1-3Alkyl, C
1-3Halogenated alkyl, phenyl or substituted-phenyl are being under a plurality of situation, can be identical or different respectively.As above-mentioned substituted-phenyl, for example can enumerate and have from halogen, C
1-3Alkyl and C
1-3At least a substituent substituted-phenyl of selecting in the group that halogenated alkyl is formed.In addition, as above-mentioned halogen, for example can enumerate fluorine, chlorine, bromine or iodine.D is 0 to 2 integer, and e is 0 to 3 integer.
In above-mentioned formula (3)～(5), Q is a substituting group, and f represents that it replaces number.Q is atom or the group for selecting from the group that hydrogen, halogen, alkyl, substituted alkyl, nitro, cyano group, alkylthio, alkoxy, aryl, substituted aryl, alkyl ester group and substituted alkyl ester group are formed for example, at Q is under the situation of plural number, can be identical or different respectively.As above-mentioned halogen, for example can enumerate fluorine, chlorine, bromine and iodine.As above-mentioned substituted alkyl, for example can enumerate halogenated alkyl.In addition, as above-mentioned substituted aryl, for example can enumerate halogenated aryl.F is 0 to 4 integer, and g is 0 to 3 integer, and h is 1 to 3 integer.In addition, preferred g and h are greater than 1.
In above-mentioned formula (4), R
10And R
11Independent respectively, be the group of selecting the group of forming from hydrogen, halogen, phenyl, substituted-phenyl, alkyl and substituted alkyl.Wherein, R
10And R
11Independent respectively, be preferably halogenated alkyl.
In above-mentioned formula (5), M
1And M
2Independent respectively, for example be halogen, C
1-3Alkyl, C
1-3Halogenated alkyl, phenyl or substituted-phenyl.As above-mentioned halogen, for example can enumerate fluorine, chlorine, bromine and iodine.In addition, as above-mentioned substituted-phenyl, for example can enumerate and have from halogen, C
1-3Alkyl and C
1-3At least a substituent substituted-phenyl of selecting in the group that halogenated alkyl is formed.
As the object lesson of the polyimide shown in the above-mentioned formula (3), for example can enumerate following formula (6) those shown etc.
[changing 8]
And then as above-mentioned polyimide, for example can enumerate is that foregoing skeleton (repetitive) acid dianhydride or diamines in addition suitably carries out the multipolymer that copolymerization obtains.
As above-mentioned acid dianhydride, for example can enumerate aromatic tetracarboxylic acid's dianhydride.As above-mentioned aromatic tetracarboxylic acid's dianhydride, for example can enumerate pyromellitic dianhydride, benzophenone tetracarboxylic dianhydride, naphthalene tetracarboxylic acid dianhydride, hetero ring type aromatic tetracarboxylic acid dianhydride, 2,2 '-substituted biphenyl tetracarboxylic dianhydride etc.
As above-mentioned pyromellitic dianhydride, for example can enumerate pyromellitic dianhydride, 3,6-diphenyl pyromellitic dianhydride, 3, two (trifluoromethyl) pyromellitic dianhydride, 3 of 6-, 6-two bromo pyromellitic dianhydride, 3,6-dichloro pyromellitic dianhydride etc.As above-mentioned benzophenone tetracarboxylic dianhydride, for example can enumerate 3,3 ', 4,4 '-benzophenone tetracarboxylic dianhydride, 2,3,3 ', 4 '-benzophenone tetracarboxylic dianhydride, 2,2 ', 3,3 '-benzophenone tetracarboxylic dianhydride etc.As above-mentioned naphthalene tetracarboxylic acid dianhydride, for example can enumerate 2,3,6,7-naphthalene-tetracarboxylic dianhydride, 1,2,5,6-naphthalene-tetracarboxylic dianhydride, 2,6-two chloro-naphthalenes-1,4,5,8-tetracarboxylic dianhydride etc.As above-mentioned hetero ring type aromatic tetracarboxylic acid dianhydride, for example can enumerate thiophene-2,3,4,5-tetracarboxylic dianhydride, pyrazine-2,3,5,6-tetracarboxylic dianhydride, pyridine-2,3,5,6-tetracarboxylic dianhydride etc.As above-mentioned 2,2 '-substituted biphenyl tetracarboxylic dianhydride for example can enumerate 2,2 '-two bromo-4,4 ', 5,5 '-biphenyl tetracarboxylic dianhydride, 2,2 '-two chloro-4,4 ', 5,5 '-biphenyl tetracarboxylic dianhydride, 2,2 '-two (trifluoromethyl)-4,4 ', 5,5 '-biphenyl tetracarboxylic dianhydride etc.
In addition, as other example of above-mentioned aromatic tetracarboxylic acid's dianhydride, can enumerate 3,3 ', 4,4 '-biphenyl tetracarboxylic dianhydride, two (2,3-dicarboxyl phenyl) methane dianhydride, two (2,5,6-three fluoro-3,4-dicarboxyl phenyl) methane dianhydride, 2, two (3,4-dicarboxyl phenyl)-1 of 2-, 1,1,3,3, the 3-hexafluoropropane dianhydride, 4,4 '-two (3,4-dicarboxyl phenyl)-2,2-diphenyl propane dianhydride, two (3,4-dicarboxyl phenyl) ether dianhydride, 4,4 '-oxygen base, two phthalic acid dianhydrides, two (3,4-dicarboxyl phenyl) sulfonic acid dianhydride, 3,3 ', 4,4 '-diphenyl sulfone tetracarboxylic dianhydride, 4,4 '-[4,4 '-isopropylidene-two (right-phenylene oxygen base)] two (phthalate anhydrides), N, N-(3,4-dicarboxyl phenyl)-N-methyl amine dianhydride, two (3,4-dicarboxyl phenyl) diethylsilane dianhydride etc.
Wherein, preferred 2 as above-mentioned aromatic tetracarboxylic acid's dianhydride, 2 '-substituted biphenyl tetracarboxylic dianhydride, more preferably 2,2 '-two (trihalomethyl)-4,4 ', 5,5 '-biphenyl tetracarboxylic dianhydride, preferred especially 2,2 '-two (trifluoromethyl)-4,4 ', 5,5 '-biphenyl tetracarboxylic dianhydride.
As above-mentioned diamines, for example can enumerate aromatic diamine, as object lesson, can enumerate phenylenediamine, diaminobenzophenone, naphthylenediamine, hetero ring type aromatic diamine and other aromatic diamine.
As above-mentioned phenylenediamine, for example can enumerate the neighbour-,-and p-phenylenediamine, 2,4-diaminotoluene, 1,4-diamido-2-methoxybenzene, 1,4-diamido-2-phenyl benzene and 1, the diamines of selecting in the group that the 3-diamido-phenylenediamines such as 4-chlorobenzene are formed etc.The example of above-mentioned diaminobenzophenone can enumerate 2,2 '-diaminobenzophenone and 3,3 '-diaminobenzophenone etc.As above-mentioned naphthylenediamine, for example can enumerate 1,8-diaminonaphthalene and 1,5-diaminonaphthalene etc.As the example of above-mentioned hetero ring type aromatic diamine, can enumerate 2,6-diamino-pyridine, 2,4-diamino-pyridine and 2,4-diamido-S-triazine etc.
In addition, as aromatic diamine, except above-mentioned, can enumerate 4,4 '-benzidine, 4,4 '-diaminodiphenyl-methane, 4,4 '-(9-fluorenylidene)-diphenylamine, 2,2 '-two (trifluoromethyl)-4,4 '-benzidine, 3,3 '-two chloro-4,4 '-diaminodiphenyl-methane, 2,2 '-two chloro-4,4 '-benzidine, 2,2 ', 5,5 '-tetrachloro benzidine, 2, two (the 4-amino-benzene oxygen phenyl) propane of 2-, 2, two (4-aminophenyl) propane of 2-, 2, two (the 4-aminophenyls)-1,1 of 2-, 1,3,3, the 3-HFC-236fa, 4,4 '-diamino-diphenyl ether, 3,4 '-diaminodiphenyl ether, 1, two (3-amino-benzene oxygen) benzene of 3-, 1, two (4-amino-benzene oxygen) benzene of 3-, 1, two (4-amino-benzene oxygen) benzene of 4-, 4,4 '-two (4-amino-benzene oxygen) biphenyl, 4,4 '-two (3-amino-benzene oxygen) biphenyl, 2, two [4-(4-amino-benzene oxygen) phenyl] propane of 2-, 2, two [4-(4-amino-benzene oxygen) phenyl]-1 of 2-, 1,1,3,3, the 3-HFC-236fa, 4,4 '-diamino-diphenyl thioether, 4,4 '-diamino diphenyl sulfone etc.
As above-mentioned polyetherketone, for example can enumerate the spy and open the PAEK shown in the following general formula (7) that the 2001-49110 communique put down in writing.
[changing 9]
In above-mentioned formula (7), X represents substituting group, and q represents that it replaces number.X for example is halogen atom, low alkyl group, halogenated alkyl, lower alkoxy or halogenated alkoxy, under X is a plurality of situation, and can be identical or different respectively.
As above-mentioned halogen atom, for example can enumerate fluorine atom, bromine atoms, chlorine atom and iodine atom, wherein, be preferred with the fluorine atom.As above-mentioned low alkyl group, for example preferably has C
1～6Straight chain or the alkyl of branched chain, more preferably C
1～4Straight chain or the alkyl of branched chain.Particularly, serve as preferred with methyl, ethyl, propyl group, isopropyl, butyl, isobutyl, sec-butyl and the tert-butyl group, and special preferable methyl and ethyl.As above-mentioned halogenated alkyl, for example can enumerate the halogenide of above-mentioned low alkyl groups such as trifluoromethyl.As above-mentioned lower alkoxy, for example preferred C
1～6Straight chain or the alkoxy of branched chain, more preferably C
1～4Straight chain or the alkoxy of branched chain.Particularly, preferred methoxyl, ethoxy, propoxyl group, isopropoxy, butoxy, isobutoxy, sec-butoxy and tert-butoxy, preferred especially methoxyl and ethoxy.As above-mentioned halogenated alkoxy, for example can enumerate the halogenide of above-mentioned lower alkoxies such as trifluoromethoxy.
In above-mentioned formula (7), q is 0 to 4 integer.In above-mentioned formula (7), preferred q=0, and be combined in the carbonyl at phenyl ring two ends and the oxygen atom of ether is present in contraposition each other.
In addition, in above-mentioned formula (7), R
1Be the group shown in the following formula (8), m is 0 or 1 integer.
[changing 10]
In above-mentioned formula (8), X ' represents substituting group, and is for example, same with the X in the above-mentioned formula (7).In above-mentioned formula (8), under X ' is a plurality of situation, can be identical or different respectively.Q ' represents the replacement number of above-mentioned X ', is 0 to 4 integer, preferred q '=0.In addition, p is 0 or 1 integer.
In above-mentioned formula (8), R
2Expression binary aromatic group.As this binary aromatic group, for example can enumerate the neighbour-,-right-phenylene or from naphthalene, biphenyl, anthracene, neighbour-,-or right-terphenyl, phenanthrene, dibenzofurans, biphenyl ether or biphenyl sulfone the binary group of being derived etc.In the aromatic group of these binary, the hydrogen that directly is combined on the aromatic series also can be replaced by halogen atom, low alkyl group or lower alkoxy.Wherein, as above-mentioned R
2, the preferred aromatic group of from the group that following formula (9)～(15) are formed, selecting.
[changing 11]
In above-mentioned formula (7), R
1Preferably use the group of following formula (16) expression, and in following formula (16), R
2And p and above-mentioned formula (8) synonym.
[changing 12]
And then in above-mentioned formula (7), n represents the degree of polymerization, for example is 2～5000 scope, is preferably 5～500 scope.In addition, this polymerization can be made of the repetitive of same structure, and can also be made of the repetitive of different structure.Under the situation that is the latter, the polymeric species of repetitive can be block polymerization, can also be atactic polymerization.
And then the end of the PAEK shown in the above-mentioned formula (7) is preferably right-and tetrafluoro benzoylene side is that fluorine, oxyalkylene side are hydrogen atom, such PAEK for example can be represented with following general formula (17).In addition, in following formula, n represents and the same degree of polymerization of above-mentioned formula (7).
[changing 13]
As the concrete example of the PAEK shown in the above-mentioned formula (7), can enumerate following formula (18)～(21) those shown etc., following various in, n represents and the same degree of polymerization of above-mentioned formula (7).
[changing 14]
[changing 15]
[changing 16]
[changing 17]
In addition, in addition, as above-mentioned polyamide or polyester, for example can enumerate polyamide or polyester that the flat 10-508048 communique of special table is put down in writing, these repetitives for example can be represented with following general formula (22).
[changing 18]
In above-mentioned formula (22), Y is O or NH.In addition, E for example is covalent bond, C
2Alkylidene, halogenation C
2Alkylidene, CH
2Base, C (CX
3)
2Base (herein, X is halogen or hydrogen), CO base, O atom, S atom, SO
2Base, Si (R)
2At least a group of selecting in the group that base and N (R) base are formed can be identical or different respectively.In above-mentioned E, R is C
1-3Alkyl and C
1-3Halogenated alkyl at least a with respect to carbonyl functional group or Y base, is a position or contraposition.
In addition, in above-mentioned formula (22), A and A ' are substituting group, and t and z represent that respectively it replaces number.In addition, p is 0 to 3 integer, and q is 1 to 3 integer, and r is 0 to 3 integer.
Above-mentioned A is selected from for example hydrogen, halogen, C
1-3Alkyl, C
1-3Alkoxy shown in the halogenated alkyl, OR (herein, R is definition as mentioned above), aryl, substituted aryl, C by halogenation etc.
1-9Alkoxy carbonyl group, C
1-9Alkane carbonyl oxygen base, C
1-12Aryloxy carbonyl, C
1-12Virtue carbonyl oxygen base and substitutive derivative thereof, C
1-12Aryl-amino-carbonyl and C
1-12The group that aryl-amino-carbonyl and substitutive derivative thereof are formed is being under a plurality of situation, can be identical or different respectively.Above-mentioned A ' is selected from and for example is halogen, C
1-3Alkyl, C
1-3The group that halogenated alkyl, phenyl and substituted-phenyl are formed is being under a plurality of situation, can be identical or different respectively.As the substituting group on the phenyl ring of above-mentioned substituted-phenyl, for example can enumerate halogen, C
1-3Alkyl, C
1-3Halogenated alkyl and their combination.Above-mentioned t is 0 to 4 integer, and above-mentioned z is 0 to 3 integer.
In the repetitive of polyamide shown in the above-mentioned formula (22) or polyester, preferably in order to following general formula (23) those shown.
[changing 19]
In above-mentioned formula (23), A, A ' and Y are the definition of formula (22) as mentioned above, and v is 0 to 3 integer, is preferably 0 to 2 integer.X and y are respectively 0 or 1, but are not to be all 0.
Above-mentioned minus biaxiality optical element, as representative example, base film is coated with the solution of above-mentioned non-liquid-crystalline polymer, remove the solvent in this solution and form the layer of non-liquid-crystalline polymer, as required, from base film strip out formed non-liquid-crystalline polymer the layer and obtain.
In above-mentioned manufacture method, preferably can be used to give (the processing of nx＞ny＞nz) of optics biaxiality.By carrying out such processing, give poor (nx＞ny), the and (optical element (being minus biaxiality optical element) of nx＞ny＞nz) that can obtain to have the optics biaxiality of refractive index in then can the opposite infalliblely.In other words, (the optical element of nx=ny＞nz) that if carry out such processing, then can obtain to have an optic characteristic.As the method for giving refringence in the opposite, for example can enumerate following method.As first method, can enumerate in the above-mentioned solution of transparent polymer film coated of having implemented stretch processing and dry method.By this first method, then can reach the optics biaxiality by the contraction of transparent polymer film.As second method, while can enumerate the above-mentioned solution of transparent polymer film coated that does not stretch, and dry, heat the method that stretches.According to this second method, then can reach the optics biaxiality by the stretching of transparent polymer film.As the macromolecule membrane that in these methods, uses, can enumerate used plastic sheeting in the above-mentioned polariscopic protective film (E item).
Below, specify the present invention according to embodiment, but the present invention is not limited by these embodiment.The measuring method of each characteristic among the embodiment is as follows.
(1) measurement of phase differential
Refractive index n x, ny and nz with automatic birefringence measurement device (prince's instrumentation machine incorporated company system, birefringence meter KOBRA21-ADH automatically) instrumentation sample film calculate phase differential Re and thickness direction phase differential Rth in the face.And then, calculate the Nz coefficient by Rth/Re.Measuring temperature is 23 ℃, and the measurement wavelength is 590nm.
(2) measurement of form and aspect
Make the liquid crystal indicator display white image and the black image of made, use the trade name " EZ Contrast160D " of ELDIM corporate system, with respect to the form and aspect of this display device measuring vertical direction.
(3) gamut
Use the trade name " EZ Contrast160D " of ELDIM corporate system, and, make polar angle, measure the tone of liquid crystal indicator, on the XY chromatic diagram, draw in 0 °～80 ° variations with the 45 ° of directions in position angle.In addition, position angle and polar angle are as shown in Figure 4.In Fig. 4,0 ° of-180 ° of direction is to distinguish the polariscopic absorption axes direction of looking side.
(reference example 1: the formation of minus biaxiality optical element)
Will be by 2,2-two (3,4-dicarboxyl phenyl) hexafluoropropane dianhydride (6FDA), with 2,2 '-two (trifluoromethyl)-4, weight-average molecular weight (Mw) 70 shown in the following formula (6) that 4 '-benzidine (TFMB) is synthesized, 000 polyimide is dissolved in the cyclohexanone, modulates the polyimide solution of 15 quality %.In addition, the method for the reference literatures such as modulation of polyimide (F.Li et al.Polymer40 (1999) 4571-4583).On the other hand,, triacetyl cellulose (TAC) film of thickness 80 μ m 175 ℃ of 1.3 times of horizontal stretchings down, is made the stretching TAC film of thickness 75 μ m, be used as base film by the horizontal stretching of stiff end.Secondly, the above-mentioned polyimide solution of coating on this base film, and following dry 10 minutes in 100 ℃.Its result obtains having the optical thin film A of minus biaxiality optical element on base film.Phase differential is 60nm in the face of minus biaxiality optical element, and the phase differential of thickness direction is 240nm.Minus biaxiality optical element has the optical characteristics of nx＞ny＞nz.In addition, the Δ n of base film (stretching TAC film) is about 0.0006.
[changing 20]
(making of the lamilated body of 2: the first polariscopes of reference example and minus biaxiality optical element) dyes polyvinyl alcohol film in containing the aqueous solution of iodine after, in containing the aqueous solution of boric acid between the different roller of speed ratio with 6 times of uniaxial tensions, obtain polariscope (first polariscope).The laminated polariscope that obtains on the face that does not form minus biaxiality optical element of the base film of above-mentioned optical thin film A.At this moment, according to slow axis that makes minus biaxiality optical element and polariscopic absorption axes vertical in fact each other mode carry out laminated.And then, polariscopic not with the laminated face of optical thin film A on, laminated commercially available TAC film (thickness 40 μ m) [trade name " UZ-TAC " of Fujiphoto (thigh) system] as protective seam, makes lamilated body B.
(reference example 3: the making of optical compensating layer)
Use the stiff end drawing process, commercially available polycarbonate film (Kaneka corporate system, trade name R film, thickness 65 μ m) is stretched for 1.75 times with stretching ratio under 170 ℃ of draft temperatures, obtain the oriented film C of thickness 39 μ m.This film is used as optical compensating layer.Phase differential is 280nm in the face of oriented film C, and the phase differential of thickness direction is 448nm, and the Nz coefficient is 1.6.
(reference example 4: the making of optical compensating layer)
Use the free end drawing process, commercially available polycarbonate film (Kaneka corporate system, trade name R film, thickness 65 μ m) is stretched for 1.15 times with stretching ratio under 155 ℃ of draft temperatures, obtain the oriented film D of thickness 60 μ m.This film is used as optical compensating layer.Phase differential is 280nm in the face of oriented film D, and the phase differential of thickness direction is 336nm, and the Nz coefficient is 1.2.
(reference example 5: the making of backlight portion)
In the light source portion that is constituted by fluorescent light and the reflecting plate that is disposed at this fluorescent light rear and the light diffuser plate (opaque plate) that disposed in this fluorescent light the place ahead, commercially available rectilinearly polarized light separating film (3M corporate system, trade name DBEF) is installed, is made the E of backlight portion.
(embodiment 1)
Take out liquid crystal cells in use from 26 inches LCD TV (trade name Aquos) of SHARP corporate system.In the backlight side of this liquid crystal cells, become the mode in the outside (backlight side) with the TAC protective seam, paste above-mentioned lamilated body B by acrylic adhesive (thickness 20 μ m).And then, in the outside of TAC protective seam, paste optical compensating layer (oriented film) C by acrylic adhesive (thickness 20 μ m).The absorption axes mode vertical with the slow axis of optical compensating layer according to the polariscope that makes lamilated body B (first polariscope) pasted.And then, in the outside of optical compensating layer, the backlight E of portion is installed.On the other hand; identification side at liquid crystal cells; become the mode in the outside (distinguish and look side) with the TAC protective seam, paste by acrylic adhesive (thickness 20 μ m) and to have polariscope/polaroid (Nitto Denko Corp.'s system, trade name " HEG1425DU ") of TAC protective layer structure.According to the absorption axes of the polariscope that makes the backlight side (first polariscope), be configured with the orthogonal mode of the absorption axes of the polariscope (second polariscope) of identification side.Thus, make liquid crystal panel.For the liquid crystal panel of gained, measure form and aspect and gamut.The measurement result of gamut is shown in Fig. 5.
(embodiment 2)
Use 32 inches LCD TV (trade name Aquos) of SHARP corporate system, and use optical compensating layer (oriented film) D to replace optical compensating layer (oriented film) C, in addition, with the embodiment 1 the same liquid crystal panel of making.For the liquid crystal panel of gained, measure form and aspect and gamut.The measurement result of gamut is shown in Fig. 6.
(embodiment 3)
Except according to make the first polariscopic absorption axes mode parallel with the slow axis of optical compensating layer carry out laminated, equally make liquid crystal panel with embodiment 2.For the liquid crystal panel of gained, measure form and aspect and gamut.The measurement result of gamut is shown in Fig. 7.
(comparative example 1)
Except optical compensating layer is not set, equally make liquid crystal panel with embodiment 1.For the liquid crystal panel of gained, measure form and aspect and gamut.The measurement result of gamut is shown in Fig. 8.
(comparative example 2)
Except use does not have the backlight portion of rectilinearly polarized light separating film, equally make liquid crystal panel with embodiment 1.For the liquid crystal panel of gained, measure form and aspect and gamut.The measurement result of gamut is shown in Fig. 9.
As Fig. 5～shown in Figure 9, obviously to compare with the liquid crystal panel of comparative example 1～2 as can be known, the gamut of the liquid crystal panel of embodiment 1～3 is improved.The gamut of liquid crystal panel that particularly can recognize embodiment 1 is good especially.And then, about the form and aspect of frontal, to compare with the liquid crystal panel of comparative example, the liquid crystal panel that also can confirm embodiment is that the influence of color of backlight itself is few.
(utilizability on the industry)
Liquid crystal indicator of the present invention is fit to be applied to LCD TV, mobile phone etc.
Claims (9)
1. liquid crystal panel, wherein,
Possess backlight portion, optical compensating layer, first polariscope, liquid crystal cells and second polariscope that sends polarized light according to following order from the backlight side.
2. liquid crystal panel as claimed in claim 1, wherein,
The Nz coefficient of described optical compensating layer is the scope of 1＜Nz＜3.
3. as claim 1 or 2 described liquid crystal panels, wherein,
Described optical compensating layer is with cellulose esters or the polycarbonate oriented film as the macromolecule membrane of major component.
4. as any described liquid crystal panel in the claim 1～3, wherein,
The described backlight portion that sends polarized light comprises light source portion and the rectilinearly polarized light separating film that sends natural light.
5. as any described liquid crystal panel in the claim 1～4, wherein,
Between described first polariscope and the liquid crystal cells and/or between described second polariscope and the liquid crystal cells, also possesses minus biaxiality optical element.
6. liquid crystal panel as claimed in claim 5, wherein,
Described minus biaxiality optical element is formed by at least a non-liquid crystal polymer material of selecting from polyamide, polyimide, polyester, polyetherketone, polyamidoimide and polyester-imide.
7. as any described liquid crystal panel in the claim 1～6, wherein,
The slow axis of described optical compensating layer and the described first polariscopic absorption axes are quadrature.
8. as any described liquid crystal panel in the claim 1～7, wherein,
The drive pattern of described liquid crystal cells is selected from the group of being made up of STN pattern, TN pattern, IPS pattern, VA pattern, ocb mode, HAN pattern and ASM pattern.
9. liquid crystal indicator, wherein,
Contain any described liquid crystal panel in the claim 1 to 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005007210A JP5271476B2 (en) | 2005-01-14 | 2005-01-14 | Liquid crystal panel and liquid crystal display device |
| JP007210/2005 | 2005-01-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101080662A true CN101080662A (en) | 2007-11-28 |
Family
ID=36677511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800428297A Pending CN101080662A (en) | 2005-01-14 | 2005-12-19 | Liquid crystal panel and liquid crystal display |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP5271476B2 (en) |
| KR (1) | KR100916738B1 (en) |
| CN (1) | CN101080662A (en) |
| TW (1) | TW200630718A (en) |
| WO (1) | WO2006075480A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11022837B2 (en) * | 2016-10-31 | 2021-06-01 | Fujifilm Corporation | Optical film and liquid crystal display device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5252611B2 (en) | 2006-09-15 | 2013-07-31 | 日東電工株式会社 | Retardation film, optical laminate, liquid crystal panel, and liquid crystal display device |
| KR101389265B1 (en) * | 2007-01-17 | 2014-05-28 | 삼성디스플레이 주식회사 | Liquid crystal display device having biased electrically controlled birefringence |
| JP2008233654A (en) * | 2007-03-22 | 2008-10-02 | Fujifilm Corp | Optical compensation film, and polarizing plate and liquid crystal display device using the same |
| CN106932964B (en) | 2008-03-31 | 2020-09-29 | 3M创新有限公司 | Optical film |
| KR101629742B1 (en) * | 2009-09-24 | 2016-06-13 | 동우 화인켐 주식회사 | In-plane switching mode liquid crystal display |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3373374B2 (en) * | 1995-11-09 | 2003-02-04 | 日東電工株式会社 | Polarizing element and elliptically polarizing element |
| JP3376233B2 (en) * | 1996-12-27 | 2003-02-10 | 日東電工株式会社 | Polarizing reflection element, elliptically polarizing element, and liquid crystal display |
| JP3591699B2 (en) * | 1997-10-09 | 2004-11-24 | 日東電工株式会社 | Polarizing element, optical element, illumination device, and liquid crystal display device |
| JPH11311710A (en) * | 1998-04-27 | 1999-11-09 | Nitto Denko Corp | Polarizing element, optical element, lighting device, and liquid crystal display device |
| JP2000321431A (en) * | 1999-05-17 | 2000-11-24 | Nitto Denko Corp | Polarizing element, optical element, polarized light source and liquid crystal display device |
| KR100462327B1 (en) * | 2003-01-28 | 2004-12-18 | 주식회사 엘지화학 | Vertically aligned liquid crystal display having a bi-axial retardation compensation film |
-
2005
- 2005-01-14 JP JP2005007210A patent/JP5271476B2/en not_active Expired - Fee Related
- 2005-12-19 CN CNA2005800428297A patent/CN101080662A/en active Pending
- 2005-12-19 WO PCT/JP2005/023252 patent/WO2006075480A1/en not_active Application Discontinuation
- 2005-12-19 KR KR1020077015467A patent/KR100916738B1/en not_active Expired - Fee Related
-
2006
- 2006-01-09 TW TW095100722A patent/TW200630718A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11022837B2 (en) * | 2016-10-31 | 2021-06-01 | Fujifilm Corporation | Optical film and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070092264A (en) | 2007-09-12 |
| WO2006075480A1 (en) | 2006-07-20 |
| JP5271476B2 (en) | 2013-08-21 |
| TW200630718A (en) | 2006-09-01 |
| JP2006195211A (en) | 2006-07-27 |
| KR100916738B1 (en) | 2009-09-14 |
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