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WO2003012620A1 - Unite a panneau tactile et unite d'affichage a cristaux liquides - Google Patents

Unite a panneau tactile et unite d'affichage a cristaux liquides Download PDF

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Publication number
WO2003012620A1
WO2003012620A1 PCT/JP2002/007662 JP0207662W WO03012620A1 WO 2003012620 A1 WO2003012620 A1 WO 2003012620A1 JP 0207662 W JP0207662 W JP 0207662W WO 03012620 A1 WO03012620 A1 WO 03012620A1
Authority
WO
WIPO (PCT)
Prior art keywords
touch panel
transparent
liquid crystal
crystal display
absorbing layer
Prior art date
Application number
PCT/JP2002/007662
Other languages
English (en)
Japanese (ja)
Inventor
Takayuki Takagi
Kazuhiro Nishikawa
Takao Hashimoto
Original Assignee
Nissha Printing Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissha Printing Co., Ltd. filed Critical Nissha Printing Co., Ltd.
Publication of WO2003012620A1 publication Critical patent/WO2003012620A1/fr

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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
    • G02F1/13338—Input devices, e.g. touch panels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/056—Diffuser; Uneven surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor

Definitions

  • the present invention provides a resistive touch panel device that presses a part of the surface of a touch panel to bend an upper electrode plate to contact an upper electrode and a lower electrode, electrically conduct and input coordinates, and
  • the present invention relates to a liquid crystal display device in which the touch panel device and a liquid crystal display panel are assembled.
  • the touch panel device and the liquid crystal display device of the present invention are particularly suitable for electronic devices such as cordless telephones, mobile phones, calculators, personal computers, PDAs (personal digital assistants), digital cameras, video cameras, and commercial communication devices. It is something. Background art
  • a reflection type liquid crystal display panel is sometimes used to reduce power consumption.
  • Reflective liquid crystal display panels are suitable for portable electronic devices because they have low power consumption by not using a backlight, and they also have excellent visibility under external light when used outdoors.
  • a front light device which is a lighting device in which a light source is located, is arranged.
  • a light guide plate is placed in parallel on the display surface of a reflective liquid crystal display. Irradiation is common.
  • One surface of the light guide plate has a light diffusing function for emitting light incident from the end surface to the display surface of the liquid crystal display.
  • As the light diffusion function a large number of fine prisms and microlenses are formed on the upper surface of the light guide plate, and light is diffused by performing fine matte processing. There is something to do.
  • Touch panel devices are frequently used as input devices in portable electronic devices.
  • the touch panel device is located above the front light device of the liquid crystal display panel.
  • a transparent film having a transparent conductive film formed on a lower surface is used as an upper electrode plate, and a transparent resin plate having a transparent conductive film formed on an upper surface is used as a lower electrode plate. Some of them are laminated so as to face each other. Further, as the lower electrode plate, a transparent film having a transparent conductive film formed on the upper surface is completely adhered to a transparent resin plate as a support, or a lower electrode plate similar to the upper electrode plate is used. Some are also used.
  • reference numeral 112 denotes an upper electrode film
  • reference numeral 113 denotes an upper electrode of a transparent conductive film
  • reference numeral 114 denotes a dot spacer
  • reference numeral 16 denotes a lower electrode of the transparent conductive film. 22 is a light source.
  • an object of the present invention is to solve the above-mentioned problems and to prevent a touch panel from being damaged on the upper surface of the light guide plate of the front light device even when the touch panel device is arranged on the front light device and an input operation is performed.
  • a device and a liquid crystal display device are provided. Disclosure of the invention
  • the present invention is configured as described below to achieve the above object.
  • a front light device and a liquid crystal display there is provided a front light device and a liquid crystal display.
  • a touch panel device that is assembled to a liquid crystal display panel to constitute a liquid crystal display device.
  • a transparent and flexible shock-absorbing layer is disposed on the lower surface of the transparent touch panel, and a transparent film layer for preventing adhesion is disposed on the lower surface of the shock-absorbing layer.
  • a transparent film layer for prevention is arranged so as to be able to contact the prism on the upper surface of the light guide plate of the front light device, and when the prism contacts the shock absorbing layer at the time of input to the touch panel, the contacted portion is depressed. This provides a touch panel device that is flexible enough to absorb the impact from the prism.
  • the impact absorbing layer has a total light transmittance of 85% or more and a haze of 5% or less, and has a thickness of 10 to 500 ⁇ .
  • the touch panel device according to the first aspect is provided.
  • an upper electrode made of a transparent conductive film is provided on a surface of an upper electrode plate made of a transparent film, and a lower electrode plate made of a transparent resin plate
  • a lower electrode composed of a transparent conductive film and a dot-shaped spacer are provided on the surface of the first and second electrodes, and both electrodes are stacked so as to face each other with a gap provided by the spacer.
  • an upper electrode composed of a transparent conductive film is provided on a surface of the upper electrode plate composed of the transparent touch panel force transparent film, and a surface of the lower electrode plate composed of the transparent film is provided.
  • a first electrode or a lower electrode comprising a transparent conductive film and a dot-shaped spacer are provided, and both electrodes are stacked so as to face each other with a gap provided by the spacer.
  • a touch panel device Provided is a touch panel device according to (1).
  • an upper electrode made of a transparent conductive film is provided on a surface of an upper electrode plate made of a transparent film, and a lower electrode plate made of a transparent film is provided.
  • a lower electrode made of a transparent conductive film and a dot-shaped spacer are provided on the surface, and a support made of a transparent resin plate is provided on the back surface of the lower electrode plate. Facing each other with a gap.
  • the impact-absorbing layer is a phenolic silicone resin having a thickness of 50 to 500 ⁇ m and having an adhesive property on its surface, and the silicone resin
  • the amplitude width at 25 ° C. is 25 ⁇ m or more.
  • a touch panel device as described.
  • the touch panel device according to the first or second aspect, wherein a hard coat layer is further arranged on the lower surface of the transparent film layer.
  • a liquid crystal display device in which the touch panel device according to any one of the first to eighth aspects is assembled to a liquid crystal display panel having a front light device and a liquid crystal display. .
  • the liquid crystal display device according to the ninth aspect, wherein an air layer exists between the prism on the upper surface of the light guide plate and the touch panel device.
  • FIG. 1 is a cross-sectional view showing a liquid crystal display device for a portable electronic device incorporating the touch panel device according to the first embodiment of the present invention
  • FIG. 2 is a cross-sectional view showing a liquid crystal display device for a portable electronic device incorporating the touch panel device according to the second embodiment of the present invention
  • FIG. 3 is a cross-sectional view showing a liquid crystal display device for a portable electronic device incorporating the touch panel device according to the third embodiment of the present invention
  • FIG. 4 is a cross-sectional view illustrating a liquid crystal display device for a portable electronic device incorporating the touch panel device according to the fourth embodiment of the present invention.
  • FIG. 5 is a cross-sectional view illustrating a liquid crystal display device for a portable electronic device incorporating the touch panel device according to the fifth embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing a liquid crystal display device for a portable electronic device incorporating the touch panel device according to the sixth embodiment of the present invention.
  • FIG. 7 is a perspective view showing a portable electronic device incorporating any one of the liquid crystal display devices having the touch panel device according to the first to sixth embodiments of the present invention.
  • FIG. 9 is a perspective view showing a portable electronic device incorporating any of the liquid crystal display devices having the touch panel device according to the first to sixth embodiments,
  • FIG. 9 is a cross-sectional view showing a state in which a hard coat layer is formed on the lower surface of the transparent film layer in a modification of the above embodiment
  • FIG. 10 is a cross-sectional view showing a state in which a low reflection layer is formed on the lower surface of the transparent film layer in a modification of the above embodiment
  • FIG. 11 is a cross-sectional view showing a state in which a layer of a low-refractive material and a layer of a high-refractive material are alternately laminated with an optical film thickness on the lower surface of a transparent film layer in a modification of the above embodiment.
  • FIG. 3 is a cross-sectional view of the liquid crystal display device in which the touch panel device and the liquid crystal display panel are incorporated in the embodiment.
  • FIG. 13 is an explanatory view illustrating a state in which an air layer is arranged between the prism on the upper surface of the light guide plate and the shock absorbing layer of the transparent touch panel in the above embodiment,
  • FIG. 14 is a cross-sectional view illustrating a state in which the pressure at the time of contact is absorbed by the shock absorbing layer when input is performed by the touch panel device in the above embodiment
  • FIG. 15 is an enlarged sectional view of a portion surrounded by a circle in FIG.
  • FIG. 16 is a cross-sectional view illustrating a state in which the prism is damaged by pressure at the time of contact when input is performed with a conventional touch panel device.
  • FIG. 17 is an enlarged sectional view of a portion surrounded by a circle in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 to 6 are cross-sectional views showing a liquid crystal display device for a portable electronic device incorporating the touch panel device according to the first to sixth embodiments of the present invention.
  • FIG. 7 is a perspective view showing a portable electronic device having a liquid crystal display device incorporating any of the liquid crystal display devices having the touch panel device according to the first to sixth embodiments of the present invention.
  • FIG. 8 is a perspective view showing a portable electronic device having a liquid crystal display device incorporating any one of the liquid crystal display devices having the touch panel device according to the embodiment of the present invention.
  • 10 (10A, 10B, 10C, 1OD, 10E, 10F) is a touch panel device
  • 11 (11A, 11B, 11C, 1ID, 11E, 11F) is a transparent touch panel
  • 12 Is a transparent upper electrode plate
  • 13 is a transparent upper electrode
  • 14 is a spacer
  • 15 is a peripheral adhesive layer
  • 16 is a transparent lower electrode
  • 17 is a lower electrode plate made of a transparent resin plate
  • 17 F is Lower electrode plate composed of a transparent film
  • 18 is a transparent shock absorbing layer
  • 19 is a transparent film layer
  • 20 is a front light device
  • 21 is a light guide plate
  • 22 is a light source
  • 30 is a liquid crystal display
  • 41 is a transparent support
  • 5OA, 50B are portable electronic devices.
  • the transparent touch panel 11A is provided with an upper electrode 13 made of a transparent conductive film on the surface of an upper electrode plate 12 made of a transparent film.
  • a lower electrode 16 made of a transparent conductive film and a dot-shaped spacer 14 are provided on the surface of a lower electrode plate 17 made of a transparent resin plate, and both electrodes 13 and 16 are formed by the spacer 14.
  • a shock absorbing layer 18 is disposed on the back surface of the lower electrode plate 17 of the transparent touch panel 11 A, and the shock absorbing layer 18 is placed so as to be able to contact the uneven upper surface of the light guide plate 21.
  • the liquid crystal display 30 is arranged on the lower surface. Therefore, in the first embodiment, the touch panel device 10A is configured by the transparent touch panel 11A and the shock absorbing layer 18 disposed at the lowermost layer of the transparent touch panel 11A, and the touch panel device 10A is a front light device.
  • a liquid crystal display device is constructed by attaching a liquid crystal display panel having a liquid crystal display 20 and a liquid crystal display 30.
  • the touch panel device 10B includes a transparent touch panel 11B.
  • a transparent film layer 19 is arranged on the back surface of 1 A to prevent adhesion. Therefore, in the second embodiment, the transparent touch panel 11B, the shock absorbing layer 18 and the transparent film layer 19 arranged on the lower surface of the transparent touch panel 11B constitute a touch panel device 10B,
  • the touch panel device 10B is assembled to a liquid crystal display panel having a front light device 20 and a liquid crystal display 30 to constitute a liquid crystal display device.
  • the touch panel device 10C according to the third embodiment shown in FIG. 3 has a first structure in which the lower electrode plate 17 of the transparent touch panel 11C is formed of the lower electrode plate 17F of a thin transparent film.
  • the touch panel device 10 C according to the third embodiment shown in FIG. 3 includes a transparent touch panel 11 C, an upper electrode plate 12 made of a transparent film, and an upper electrode 1 3, a lower electrode plate 17 made of a transparent conductive film and a dot-shaped spacer 14 are provided on the surface of a lower electrode plate 17 F made of a transparent film. 16 are adhered and laminated by a peripheral adhesive layer 15 so as to face each other with a gap provided by a spacer 14.
  • a shock absorbing layer 18 is arranged on the back surface of the lower electrode plate 17, and the shock absorbing layer 18 is placed so as to be able to contact the uneven upper surface of the light guide plate 21, and on the lower surface of the light guide plate 21.
  • the liquid crystal display 30 is arranged. Therefore, in the third embodiment, the touch panel device 10C is constituted by the transparent touch panel 11C and the shock absorbing layer 18 disposed at the lowermost layer of the transparent touch panel 11C.
  • the liquid crystal display device is configured by assembling 0 C with a liquid crystal display panel having a front light device 20 and a liquid crystal display 30. Further, the touch panel device 10D according to the fourth embodiment of FIG.
  • the touch panel device 1 OD is constituted by the transparent touch panel 11 D, the shock absorbing layer 18 and the transparent film layer 19 disposed on the lower surface of the transparent touch panel 11 D.
  • the liquid crystal display device is configured by assembling the panel device 10D with a liquid crystal display panel having a front light device 20 and a liquid crystal display 30.
  • the transparent touch panel 11E of the touch panel device 10E according to the fifth embodiment of FIG. 5 is a support made of a transparent resin plate below the lower electrode plate 17 of the transparent touch panel 11A of the first embodiment.
  • the body 41 is formed by laminating. Therefore, in the fifth embodiment, the touch panel device 10E is configured by the transparent touch panel 11E, the support 41 disposed on the lower surface of the transparent touch panel 11E, and the shock absorbing layer 18, and the touch panel device 10E is The liquid crystal display device is constructed by assembling it with a liquid crystal display panel having a front light device 20 and a liquid crystal display 30. Further, the transparent touch panel 11F of the touch panel panel device 10F according to the sixth embodiment of FIG.
  • the touch panel device 10F includes the transparent touch panel 11F, the support 41, the shock absorbing layer 18, and the transparent film layer 19 disposed on the lower surface of the transparent touch panel 11F.
  • the touch panel device 10F is assembled to a liquid crystal display panel having a front light device 20 and a liquid crystal display 30 to constitute a liquid crystal display device.
  • the touch panel devices 10A, 10B, 10C, 1OD, 10E, and 10F include transparent touch panels 11A, 11B, 11C, 1 On the lower surface of ID, 11E, 11F, a transparent and flexible shock absorbing layer 18 is formed. (See Figures 1 to 6).
  • the flexibility of the impact absorbing layer 18 is such that when the prism 21 a on the upper surface of the light guide plate 21 of the front light device 20 comes into contact with the impact absorbing layer 18 at the time of input to the touch panel 11.
  • the recessed portion has such flexibility that the impact from the prism 21a is absorbed while being dispersed.
  • the transparent touch panel of the resistive film type includes an upper electrode plate 12 provided with an upper electrode 13 made of a transparent conductive film and a lower electrode plate 17 (17F) provided with a lower electrode 16 made of a transparent conductive film.
  • Both electrodes 1 The spacers 14 are arranged with a slight gap so that they face each other, and a part of the surface of the touch panel is pressed to bend the upper electrode plate 12 so that the electrodes 13 and 16 come into contact.
  • the upper electrode 13 composed of a transparent conductive film is formed on the surface of the upper electrode plate 12 composed of a transparent film.
  • the lower electrode 16 made of a transparent conductive film and a number of dot-shaped spacers 14 are provided on the surface of a lower electrode plate 17 (17F) made of a transparent resin plate. It is preferable to use a structure in which the layers are stacked so as to face each other with a gap provided by the spacer 14 (see FIGS. 1 to 6). Such a configuration is suitable for reducing the weight of the transparent touch panels 11A, 11B, 11C, 11D, 11E, and 11F.
  • a polycarbonate resin film a polyamide resin film, a polyetherketone resin film, an acrylic resin film, a polyethylene terephthalate resin film, a polybutylene terephthalate resin film, or the like can be used. .
  • an indium tin oxide (ITO) film, a tin oxide film, or the like can be used as the transparent conductive film.
  • the transparent resin plate a plate made of a resin having excellent transparency such as an acrylic resin, a polycarbonate resin, a polystyrene resin, or a polyolefin resin can be used.
  • the spacer 14 can be obtained by forming a transparent resin such as photosensitive acrylic or photosensitive polyester into a fine dot shape by a photo process. Also, the spacer 14 can be formed by forming a large number of transparent inks made of an acrylic resin, an epoxy resin, a polyester resin, or the like in a fine dot shape by a printing method.
  • a transparent resin such as photosensitive acrylic or photosensitive polyester
  • the spacer 14 can be formed by forming a large number of transparent inks made of an acrylic resin, an epoxy resin, a polyester resin, or the like in a fine dot shape by a printing method.
  • the peripheral adhesive layer 15 is for bonding the upper electrode plate 12 and the upper electrode 13 to the lower electrode plate 17 (17F) and the lower electrode 16 at the peripheral edge.
  • the peripheral adhesive layer 15 may be formed by applying an acrylic adhesive or the like to one or both of the peripheral portion of the lower surface of the upper electrode plate 12 and the peripheral portion of the upper surface of the lower electrode plate 17 (17F). it can. .
  • a double-sided adhesive tape may be used.
  • a transparent film may be used as the lower electrode plate 17 (17F) instead of the transparent luster plate (see FIGS. 3 and 4). In this case, a thinner model can be achieved. Further, glass may be used for the lower electrode plate 17 (17F).
  • the lower electrode plate 17 is made of glass, if there is no ordinary shock absorbing layer 18, the glass surface is exposed, and there is a case where cracks occur when a drop impact or the like occurs. In addition, there are cases where the glass bends and breaks even when subjected to static pressure with a strong load.
  • the shock absorbing layer 18 has an effect of alleviating a drop impact and a bend at the time of static pressure, so that the number of cracks can be reduced.
  • a support 41 composed of a transparent resin plate is laminated below the lower electrode plate 17 and used. (See Figures 5 and 6.) At this time, the shock absorbing layer 18 is disposed below the support 41.
  • a plate material made of a highly transparent resin such as an acrylic resin, a polycarbonate resin, a polystyrene resin, or a polyolefin resin can be used.
  • the transparent touch panels 11A, 11B, 11C, 11D, 11E, and 11F having the above-described configurations are provided with transparent touch panels 11A, 11B, 11C, 11D, 11E, and 11F. It is suitable for achieving light weight.
  • transparent touch panels 11A, 11B, 11C, 11D, 11E, and 11F different types such as a capacitance type and an optical type may be used.
  • a transparent and flexible shock absorbing layer 18 is formed on the lower surface of the transparent touch panel 11A, 11B, 11C, 11D, 11E, 11F.
  • the touch panel device 1 OA, 1 OB, I OC, 10 D, 10 E, 1 OF bends due to the load at the time of input with the input pen 51 or a finger, and the touch panel device 1 OA, 1 OB, 1 OC. , 10D, 10E, and 10F, and the light guide plate 21 having fine irregularities of the front light device 20 located below the touch panel devices 10A, 1OB, 1OC, 10D, 1OE, and 1OF.
  • the portion of the prism 21a on the upper surface of the light guide plate 21 which is in contact with the tip is dented to absorb the pressure at the time of contact, and the fine irregularities on the upper surface of the light guide plate 21 Fulfills the function of protecting.
  • the seed impact absorbing layer 18 needs to have high transparency so as not to lower the visibility of the touch panel devices 10 mm, 1 OB, 10 C, 10 D, 10 mm, and 1 OF. Specifically, it is preferable that the total light transmittance is 85% or more and the haze is 5% or less.
  • the reasons are as follows.
  • the liquid crystal display 30 of each of the above embodiments is of a reflective type, the brightness of the liquid crystal display 30 depends on the light that has passed through the touch panel 10 twice when the front light is not lit. For this reason, the transmittance of the touch panel 10 is regarded as important, and there is a general requirement of 85% or more. When the haze is high, light diffusion occurs and clear images cannot be obtained.
  • the thickness of the shock absorbing layer 18 is increased, the distance between the surface of the touch panel device 10A, 10B, 10C, 10D, 10E, 10F and the liquid crystal display 30 is increased, and the parallax is increased, so that the visibility is increased. It is unsuitable because its properties are reduced.
  • the shock absorbing layer 18 It is necessary for the shock absorbing layer 18 to have softness to absorb shock.However, if there is too much flexibility, the shape of the shock absorbing layer 18 itself will be deformed. This is inconvenient because it remains on layer 18 itself. Therefore, it is necessary to use as the shock absorbing layer 18 a material that has a certain degree of hardness and is flexible enough to absorb an impact, and is thin and / or that absorbs an impact with a thickness. Materials having such characteristics include silicone resin and polymer gel.
  • a gel sheet having an adhesive surface is suitable.
  • a silicone resin used as the shock absorbing layer 18
  • its thickness is suitably 50 to 500 / im.
  • An appropriate rubber hardness of the silicone resin is 10 to 50 (Japanese Industrial Standards (JIS) JIS-K6253 1997). Further, 10 to 30 is more desirable.
  • An acrylic resin, a urethane resin, a natural polymer material, or the like can be used as the polymer resin. If a polymer gel is used as the shock absorbing layer 18, its thickness The appropriate value is 50 to 500.
  • the transparent touch panel 11A, 1IB, 11C, 11D, 11E, 11F is applied to the lower surface and cured.
  • the shock absorbing layer 18 can be formed.
  • the shock absorbing layer 18 By sticking a polymer gel formed into a gel sheet on the lower surface of 11F, the shock absorbing layer 18 can be formed.
  • the amplitude width at 25 ° C needs to be 25 ⁇ or more. Also, it is desirable that the amplitude value has little change in the range from low temperature (20 ° C) to high temperature (70 ° C). That is, it is desirable that the hardness does not change over a wide temperature range, and examples thereof include silicone rubber and acrylic gel. In some cases, layers of different materials may be stacked to obtain desired characteristics.
  • the TMA method is defined in the Japanese Industrial Standards (JIS) JIS-K7 196 1 1991, and this standard applies to thermomechanical processing of thermoplastic films and sheets. It is a rule on the softening temperature test method based on the penetration mode of analysis (TMA).
  • the needle insertion mode is a method of measuring the displacement caused by the softening of the test piece using the needle-shaped indenter of the TMA device.
  • An adhesive can be used as the shock absorbing layer 18, but a material other than the adhesive (a non-adhesive resin material such as silicone rubber or urethane) can also be used for the shock absorbing layer 18. It is.
  • a transparent film layer 19 may be formed on the lower surface of the shock absorbing layer 18 to prevent adhesion (see FIGS. 2, 4, and 6).
  • a film such as a polyethylene terephthalate resin, a polycarbonate resin, or an acrylic resin is suitable.
  • the thickness of the transparent film layer 19 is 10 to 80 ⁇ m Is suitable.
  • a root mean square roughness (Rms) value measured by a surface roughness meter is preferably 10 nm or less. The reason is that if the film surface has large irregularities, the prism will be damaged.
  • the surface roughness is defined as Japanese Industrial Standards (JIS) JIS—B 0 6 0 1 1
  • a hard coat layer 30 may be formed on the lower surface of the transparent film layer 19 in order to prevent the surface of the transparent film layer 19 from being damaged (see FIG. 9).
  • an acrylic resin or a siloxane resin is coated to a thickness of about 2 to 1 ⁇ .
  • the hard coat layer 30 may be subjected to a fluorine coat treatment or the like.
  • a low reflection layer 31 may be formed on the lower surface of the transparent film layer 19 (not shown in FIG. 10). By forming the low reflection layer 31, the transmittance of the transparent film layer 19 can be improved.
  • the low-refractive-index film may be formed by directly processing a substance having a low refractive index.
  • Low refractive film, inorganic or metal fluoride such as M g F 2 is, using a metal oxide such as S i 0 2, can be formed by vacuum deposition.
  • it can be formed by a plasma polymerization method or a coating method such as dip using a fluorine-based monomer which is an organic substance.
  • the low-reflection layer 31 As shown in FIG. 10, in addition to a single-layer type in which a low-refractive material (fluorine, SiO 2, etc.) is formed as a single layer, as shown in FIG. fluorine, with an optical film thickness and a layer 3 3 S i 0 2, etc.) of the layers 3 2 and the high-refractive material (T i 0 2, Z r 0 2, ITO, S n O 2 , etc.), stacked alternately There is a multilayer film type.
  • a low-refractive material fluorine, SiO 2, etc.
  • the touch panel device 10 having such a configuration is a reflection type liquid crystal display 30 and a front light device such as a cordless telephone, a mobile phone, a calculator, a sub-notebook personal computer, a PDA, a digital camera, a video camera, and a business communication device.
  • the present invention can be applied to portable electronic devices 5 OA and 5 OB having a liquid crystal display panel composed of 20.
  • Portable electronic equipment 5 OA which incorporates any one of the liquid crystal display devices having the touch panel devices 10 A, 10 B, 1 OC, 10 D, 10 E, and 1 OF according to the first to sixth embodiments of the present invention, respectively. Two examples of 50 B are shown in FIGS.
  • the portable electronic devices 5 OA and 50 B have an input function using one of the touch panel devices 1 OA, 10 B, 10 C, 10 D, 10 E, and 1 OF, which are pen input devices installed at the top of the liquid crystal display device.
  • the touch panel devices 1 OA, 1 OB, 10 C, 10 D, 10 E, and 10 F use at least a reflective liquid crystal display 30 and a front light device 20 (see FIGS. 1 to 6).
  • the front light device 20 usually includes at least a transparent light guide plate 21 and a light source 22 disposed on an end face thereof.
  • the light guide plate 21 it is preferable to use a light guide plate having a transparent luster.
  • the transparent luster is made of acrylonitrile-styrene copolymer resin, cellulose acetobutylate resin, cellulose propionate resin, polymethinole pentene resin, polycarbonate resin, polystyrene resin, polyester resin with excellent transparency and light guide properties. Which can be used.
  • a plate-like light guide plate 21 having a large number of fine projections formed on the upper surface is used.
  • the fine projection shape include a prism shape, a micro lens shape, and a mat shape.
  • the air layer 40 is disposed between the prism 21 a on the upper surface of the light guide plate 21 and the transparent touch panel 11. That is, the prism on the upper surface of the light guide plate 21
  • An air layer 40 is required between the 21a and the shock absorbing layer 18 of the transparent touch panel 11 to provide a refractive index of light. This is because the difference between the refractive index of the prism 2 la (about 1.5) and the refractive index (1) of the air layer 40 (about 0.5) as shown in FIGS.
  • the prism angle and the like are designed so that light is reflected by the prism surface 21a and falls directly below, and only light reflected by the reflector 49 under the liquid crystal display 30 is emitted from the light guide plate 21. That's why. Therefore, when the air layer 40 is not provided between the prism 21a and the shock absorbing layer 18 of the transparent touch panel 11 (there is no difference in refractive index), light is not emitted well.
  • the thickness of the air layer 40 is not particularly limited, but the total set thickness and the parallax of the liquid crystal display 30 are reduced. For reasons of size, 10-100 im is preferred.
  • reference numeral 50 denotes a frame, which is a frame 50 in which the liquid crystal display 30 and the light guide plate 21 are incorporated.
  • a lower electrode plate composed of a transparent film with a thickness of 100 ⁇ formed with a sir (area occupancy of 0.1% and a height of 3 ⁇ ) is arranged so that both electrodes face each other with a gap between them with a spacer. Then, the periphery was bonded with a double-sided adhesive tape as a peripheral adhesive layer.
  • a polycarbonate plate having a thickness of 1. Omm was stuck over the entire surface via a transparent adhesive to laminate a support, thereby obtaining a transparent touch panel of a resistive film type.
  • an impact absorbing layer composed of a transparent silicone resin having a thickness of 200 xm is formed, and on the other side, a silane-based resin-based A sheet provided with a hard coat layer having a thickness of 5 ⁇ was obtained.
  • the shock absorbing layer side of this sheet was adhered to a support of a transparent touch panel, and a shock absorbing layer, a transparent film layer, and a hard coat layer were sequentially formed on the back surface of the transparent touch panel, to obtain a touch panel device.
  • the touch panel device thus obtained was laminated on the upper surface of the front light device.
  • the light guide plate of the front light device the one in which a number of prism lines having a non-equilateral triangular cross section were formed on the upper surface of an acrylic resin plate was used.
  • the apex angle of the triangle was 50 °, and the pitch between the prism lines was 20 O / zm.
  • Example 2 The same transparent touch panel as in Example 1 was used. Then, an acryl-based polymer genole-like adhesive material having a thickness of 300 / im was laminated on the lower surface of the transparent touch panel to form an impact absorbing layer.
  • a low reflection layer composed of SiO 2 was formed on one surface of polyethylene terephthalate having a thickness of 50 // m, and a hard coat layer was provided on the other surface in the same manner as in Example 1. I got a sheet. The low reflection layer side of this sheet was bonded to the lower surface of the shock absorbing layer, and a low reflection layer, a transparent film layer, and a hard coat layer were sequentially formed to obtain a touch panel device.
  • the touch panel device thus obtained was laminated on the upper surface of a front light device similar to that of Example 1, and a sliding test similar to that of Example 1 was performed. But no ⁇ -like wounds were created.
  • a touch panel device was obtained in the same manner as in Example 2.
  • the touch panel device thus obtained was laminated on the upper surface of the front light device.
  • a light guide plate of the front light device a light guide plate in which a concave groove having a lens curved surface with a radius of 5 to 15 / xm was formed linearly on the upper surface of an acryl resin plate was used.
  • the pitch between the lens grooves was set to 120 ⁇ m, and the radius of the lens grooves was increased as the distance from the entrance surface increased.
  • Example 2 The same transparent touch panel as in Example 1 was used. Next, an acrylic ester composed of an acrylic resin having a crosslinked structure was applied to the lower surface of the transparent touch panel by a coating method so as to have a thickness of 50 / zm to form a shock absorbing layer. Subsequently, a low reflection layer, a transparent film layer, and a hard coat layer were sequentially formed in the same manner as in Example 2 to obtain a touch panel device.
  • the touch panel device thus obtained was laminated on the upper surface of a front light device similar to that in Example 1, and a sliding test was performed in the same manner as in Example 1. The appearance of both the front light device and the touch panel device was No serious scratches occurred. (Comparative example)
  • a transparent polyethylene terephthalate film having a thickness of 5 O / m was stuck on the lower surface of the same transparent touch panel as in Example 1 with a transparent adhesive having a thickness of 25 ⁇ m entirely interposed therebetween to form a transparent film layer.
  • a transparent adhesive having a thickness of 25 ⁇ m entirely interposed therebetween was formed to obtain a touch panel device.
  • the touch panel device thus obtained was laminated on the upper surface of the front light device similar to that of Example 1, and a sliding test similar to that of Example 1 was performed. As a result, the front light prism was damaged by 10 reciprocations. Occurred.
  • the present invention has the following effects because it is configured by the above-described configuration.
  • the touch panel device of the present invention is configured such that a transparent and flexible shock absorbing layer is formed on the lower surface of the transparent touch panel, the touch panel device is arranged on the front light device to perform an input operation.
  • This will not damage the upper surface of the light guide plate of the front light device. That is, when the prism on the upper surface of the light guide plate of the front light device comes into direct or indirect contact with the shock absorbing layer at the time of input to the touch panel, the shock absorbing layer in the contacted part is dented due to its flexibility. The impact from the prism can be absorbed by the impact absorbing layer. Therefore, the upper surface of the light guide plate of the front light device is not damaged.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Position Input By Displaying (AREA)
  • Liquid Crystal (AREA)

Abstract

Cette invention concerne un panneau tactile disposé dans un panneau d'affichage à cristaux liquides, qui comprend une unité lumineuse frontale (20) et un écran à cristaux liquides (30). Une couche transparente et souple d'absorption des chocs (18) est disposée sur la face inférieure d'un panneau tactile transparent (11) et un film transparent (19) est apposé sur la surface inférieure de la couche d'absorption des chocs de telle sorte que ce film peut toucher un prisme (21a) sur la surface supérieure du panneau guide de lumière (21) de l'unité lumineuse frontale (20). La couche d'absorption des chocs fléchit là où elle touche le prisme et absorbe le choc que ce dernier lui transmet.
PCT/JP2002/007662 2001-07-31 2002-07-29 Unite a panneau tactile et unite d'affichage a cristaux liquides WO2003012620A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001230698 2001-07-31
JP2001-230698 2001-07-31

Publications (1)

Publication Number Publication Date
WO2003012620A1 true WO2003012620A1 (fr) 2003-02-13

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PCT/JP2002/007662 WO2003012620A1 (fr) 2001-07-31 2002-07-29 Unite a panneau tactile et unite d'affichage a cristaux liquides

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TW (1) TWI222036B (fr)
WO (1) WO2003012620A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340963C (zh) * 2005-01-11 2007-10-03 松下电器产业株式会社 触摸式面板
CN100517200C (zh) * 2005-07-25 2009-07-22 鸿富锦精密工业（深圳）有限公司 影像侦测式触控面板
WO2021119017A1 (fr) * 2019-12-09 2021-06-17 BAP Investors, LC Stratifié comprenant du polyacrylate de sodium, et systèmes et procédés associés
US20240302692A1 (en) * 2021-07-02 2024-09-12 JRD Communication (Shenzhen) Ltd. Mobile device and liquid crystal screen backlight module

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8134540B2 (en) 2007-10-16 2012-03-13 Wintek Corporation Touch panel and liquid crystal display panel
JP5672338B2 (ja) * 2013-06-04 2015-02-18 Smk株式会社 タッチパネルおよびタッチパネルの製造方法
CN111722758B (zh) 2019-03-20 2023-09-29 群光电能科技股份有限公司 发光触摸板装置
CN111722734B (zh) 2019-03-20 2024-01-02 群光电能科技股份有限公司 发光触摸板装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002189208A (ja) * 2000-12-20 2002-07-05 Minebea Co Ltd 表示装置用タッチパネル
JP2002214583A (ja) * 2000-12-28 2002-07-31 Nokia Mobile Phones Ltd タッチパネル一体型反射型ｌｃｄ装置および電子装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002189208A (ja) * 2000-12-20 2002-07-05 Minebea Co Ltd 表示装置用タッチパネル
JP2002214583A (ja) * 2000-12-28 2002-07-31 Nokia Mobile Phones Ltd タッチパネル一体型反射型ｌｃｄ装置および電子装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100340963C (zh) * 2005-01-11 2007-10-03 松下电器产业株式会社 触摸式面板
CN100517200C (zh) * 2005-07-25 2009-07-22 鸿富锦精密工业（深圳）有限公司 影像侦测式触控面板
WO2021119017A1 (fr) * 2019-12-09 2021-06-17 BAP Investors, LC Stratifié comprenant du polyacrylate de sodium, et systèmes et procédés associés
US20240302692A1 (en) * 2021-07-02 2024-09-12 JRD Communication (Shenzhen) Ltd. Mobile device and liquid crystal screen backlight module

Also Published As

Publication number Publication date
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