WO2012081679A1 - Panneau avant à des fins d'affichage, et dispositif d'affichage - Google Patents

Panneau avant à des fins d'affichage, et dispositif d'affichage Download PDF

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Publication number
WO2012081679A1
WO2012081679A1 PCT/JP2011/079095 JP2011079095W WO2012081679A1 WO 2012081679 A1 WO2012081679 A1 WO 2012081679A1 JP 2011079095 W JP2011079095 W JP 2011079095W WO 2012081679 A1 WO2012081679 A1 WO 2012081679A1
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WO
WIPO (PCT)
Prior art keywords
refractive index
layer
buffer layer
display
front plate
Prior art date
Application number
PCT/JP2011/079095
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English (en)
Japanese (ja)
Inventor
隆佳 二連木
智宏 竹安
角野　友信
浩次 新井
本間　聡
Original Assignee
大日本印刷株式会社
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Publication of WO2012081679A1 publication Critical patent/WO2012081679A1/fr

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    • 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
    • G02F1/133502—Antiglare, refractive index matching layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/418—Refractive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/202—LCD, i.e. liquid crystal displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements

Definitions

  • the present invention relates to a display front plate disposed on an observer side with respect to a display unit.
  • the present invention also relates to a display device including a display unit and a display front plate.
  • a display front plate for protecting a display unit on the viewer side of a display unit such as a liquid crystal display (hereinafter also referred to as LCD) or a plasma display (hereinafter also referred to as PDP).
  • LCD liquid crystal display
  • PDP plasma display
  • an antireflection film or an antireflection film may be installed on the outermost surface of the display front plate (see, for example, FIGS. 6B and 6C of Patent Document 1).
  • This anti-reflective film is an anti-reflective material for base films such as TAC (cellulose triacetate flakes as the main raw material, methylene chloride as solvent, triphenyl phosphate as plasticizer) film and PET (polyethylene terephthalate) film. It consists of the thing which applied.
  • the transparent substrate 20 is prepared (see FIG. 54A).
  • the roll-shaped base film 85 is spread (see FIG. 54B), and the antireflection material 30 ′ is coated on one surface of the base film 85.
  • the antireflection material 30 ′ is dried and then exposed to prepare an antireflection film.
  • the base film 85 is affixed on the transparent substrate 20 through adhesive layers, such as an adhesive agent and a tape (refer FIG.54 (d). In the figure, the said adhesive agent and tape are not described). Thereafter, the antireflection film protruding from the transparent substrate 20 is cut (see FIG. 54E).
  • a layer having a low light refractive index is used as a layer constituting the outermost surface of the antireflection film or antireflection film.
  • the thickness of the antireflection film and the layers constituting the antireflection film is generally smaller than 1 ⁇ 4 of the wavelength of visible light.
  • a low refractive index layer having a refractive index in the range of 1.20 to 1.55 and a thickness in the range of 50 to 200 nm is used as a layer constituting the outermost surface of the antireflection film. The example used is shown.
  • the low refractive index layer located on the outermost surface of the antireflection film of the display front plate is required not only to have a low light refractive index but also to have high scratch resistance.
  • the present invention provides a display front plate disposed on the viewer side with respect to the display unit, a support member including at least a transparent substrate, and a buffer layer provided on the viewer side or the display unit side of the support member, An antireflective film provided on the buffer layer, the antireflective film has a low refractive index layer located on the outermost surface, and the light refractive index of the low refractive index layer is that of the support member
  • the refractive index of the transparent substrate is smaller than the refractive index of the buffer layer
  • the refractive index of the buffer layer is larger than the refractive index of the low refractive index layer
  • the thickness of the buffer layer is the low refractive index layer. It is the display front board characterized by being larger than the thickness of this.
  • the scratch resistance of the low refractive index layer is low, the stress applied from the outside to the low refractive index layer can be relaxed by the buffer layer.
  • the scratch resistance of the entire laminate comprising the antireflection film and the buffer layer thereby preventing the antireflection film from being damaged by external stress.
  • the thickness of the low refractive index layer is in the range of 90 to 120 nm, and the thickness of the buffer layer is 0.5 ⁇ m or more.
  • the Vickers hardness when the Vickers indenter is pushed in with a load of 5 mN is in the range of 50 to 100, and the ratio of the elastic deformation amount of the buffer layer to the total deformation amount of the buffer layer at that time is 0 .55 or more.
  • the Vickers hardness when the Vickers indenter is pushed into the buffer layer with a load of 5 mN is in the range of 60 to 90, and the buffer layer with respect to the total deformation amount of the buffer layer at that time
  • the ratio of the amount of elastic deformation is 0.60 or more.
  • the buffer layer may be provided directly on the observer side of the transparent substrate of the support member.
  • the light refractive index of the low refractive index layer is smaller than 1.35.
  • the low refractive index layer may include a binder resin portion and a plurality of hollow fillers dispersed in the binder resin portion.
  • the antireflection film provided on the buffer layer provided on the observer side of the transparent substrate of the support member is provided on the display unit side of the low refractive index layer.
  • a high refractive index layer may be further included.
  • the light refractive index of the high refractive index layer is larger than the light refractive index of the transparent substrate of the support member.
  • the absolute value of the difference between the light refractive index of the buffer layer and the light refractive index of the transparent substrate of the support member is 0.03 or less.
  • the display front plate according to the present invention may further include an additional buffer layer provided on the display unit side of the support member, and an additional antireflection film provided on the display unit side of the additional buffer layer.
  • the additional antireflection film has an additional low refractive index layer positioned on the outermost surface on the display unit side, and the optical refractive index of the additional low refractive index layer is the optical refractive index of the transparent substrate of the support member.
  • the thickness of the additional low refractive index layer is in the range of 90 to 120 nm, the thickness of the additional buffer layer is 0.5 ⁇ m or more, and 5 mN relative to the additional buffer layer.
  • the Vickers hardness when the Vickers indenter is pushed in with a load of 50 to 100 is in the range of 50 to 100, and the ratio of the elastic deformation amount of the additional buffer layer to the total deformation amount of the additional buffer layer at that time is 0. 55 or more.
  • the display front plate according to the present invention may further include an additional antireflection film provided on the display portion side of the support member.
  • the additional antireflection film has an additional low refractive index layer located on the outermost surface on the display unit side, and the optical refractive index of the additional low refractive index layer is the light refraction of the transparent substrate of the support member. Smaller than the refractive index and larger than the optical refractive index of the low refractive index layer of the antireflection film, and the thickness of the additional low refractive index layer is in the range of 90 to 120 nm.
  • the additional antireflection film may further include an additional high refractive index layer provided on an observer side of the additional low refractive index layer.
  • the optical refractive index of the additional high refractive index layer is larger than the optical refractive index of the transparent substrate of the support member.
  • the buffer layer may be provided directly on the display portion side of the transparent substrate of the support member.
  • the antireflection film provided on the buffer layer may further include a high refractive index layer provided on the observer side of the low refractive index layer.
  • the light refractive index of the high refractive index layer is larger than the light refractive index of the transparent substrate of the support member.
  • the absolute value of the difference between the light refractive index of the buffer layer and the light refractive index of the transparent substrate of the support member is 0.03 or less.
  • the display front plate according to the present invention may further include a touch panel sensor including a sensor unit.
  • the sensor unit may be formed on the surface of the support member on the observer side or the surface of the display unit.
  • a signal processing unit may be connected to the sensor unit.
  • the display front plate according to the present invention may further include a polarizing plate positioned closer to the display unit than the transparent substrate of the support member.
  • the display front plate according to the present invention may further include a color filter positioned closer to the display unit than the transparent substrate of the support member.
  • the display front plate according to the present invention may further include an observer-side adhesive layer provided on the observer side of the antireflection film.
  • the display front plate according to the present invention may further include a protective layer provided on the observer side of the observer-side adhesive layer.
  • the display front plate according to the present invention may further include a display unit side adhesive layer located on the outermost surface on the display unit side.
  • the present invention comprises: a display unit that emits light for displaying an image to the viewer side; and a display front plate disposed on the viewer side with respect to the display unit, wherein the display front plate is A buffer layer provided on the observer side or the display unit side of the support member including at least the transparent substrate, and an antireflection film provided on the buffer layer, and the antireflection film is located on the outermost surface.
  • a low refractive index layer wherein the light refractive index of the low refractive index layer is smaller than the light refractive index of the transparent substrate of the support member, and the light refractive index of the buffer layer is the low refractive index layer
  • the thickness of the buffer layer is larger than the thickness of the low refractive index layer.
  • the display unit may include a touch panel sensor including a sensor unit.
  • the display unit may further include a color filter.
  • the touch panel sensor may be formed integrally with the color filter.
  • the display front plate may include a touch panel sensor including a sensor unit.
  • the sensor unit may be formed on a viewer side surface or a display unit side surface of the transparent substrate of the support member of the display front plate.
  • a display front plate having high scratch resistance can be provided.
  • FIG. 1 is a cross-sectional view showing a display device according to a first embodiment of the present invention.
  • FIG. 2 is a view showing a method for manufacturing the display front plate according to the first embodiment of the present invention.
  • FIG. 3 is a diagram for explaining the total deformation amount and elastic deformation amount of the buffer layer.
  • 4A and 4B are views showing a state in which the pressing body is pushed into the display front plate according to the first embodiment of the present invention.
  • 5A (a) and 5 (b) are views showing a state in which the pressing body is pushed into the display front plate according to the first comparative embodiment.
  • FIGS. 5B (a) and 5 (b) are views showing a state in which the pressing body is pushed into the display front plate according to the second comparative embodiment.
  • FIG. 6 is an enlarged view showing a low refractive index layer of the antireflection film in the display front plate according to the second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view showing a display device according to a third embodiment of the present invention.
  • FIG. 8 is a sectional view showing a display device according to a fourth embodiment of the present invention.
  • FIG. 9 is a sectional view showing a display device according to a modification of the fourth embodiment of the present invention.
  • FIG. 10 is a cross-sectional view illustrating an example of a display device including a design portion.
  • FIG. 11 is a cross-sectional view showing a display front plate according to a fifth embodiment of the present invention.
  • FIG. 12 is a cross-sectional view showing an example in which the display front plate shown in FIG. 11 further includes a protective layer.
  • FIG. 13 is sectional drawing which shows the display front board by the modification of the 5th Embodiment of this invention.
  • FIG. 14 is a cross-sectional view showing a display front plate according to a sixth embodiment of the present invention.
  • FIG. 15 is a cross-sectional view showing a display front plate according to a modification of the sixth embodiment of the present invention.
  • FIG. 16 is a cross-sectional view showing a display device according to a seventh embodiment of the present invention. 17 is a cross-sectional view illustrating an example in which the display device illustrated in FIG. 16 further includes an adhesive layer.
  • 18A is a plan view illustrating an example of a touch panel sensor.
  • 18B is a cross-sectional view of the touch panel sensor of FIG. 18A viewed from the XVIIIB-XVIIIB direction.
  • 18C is a cross-sectional view of the touch panel sensor of FIG. 18A viewed from the XVIIIC-XVIIIC direction.
  • 19 is a cross-sectional view illustrating an example in which the touch panel sensor illustrated in FIG. 16 includes a signal processing unit.
  • 20 is a cross-sectional view illustrating an example in which the touch panel sensor illustrated in FIG. 17 includes a signal processing unit.
  • FIG. 21 is a sectional view showing a display device according to an eighth embodiment of the present invention.
  • FIG. 21 is a sectional view showing a display device according to an eighth embodiment of the present invention.
  • FIG. 22 is a cross-sectional view showing an LCD panel of a display unit.
  • FIG. 23 is a cross-sectional view showing an example in which the display device shown in FIG. 21 further includes an optical compensation film.
  • FIG. 24 is a diagram showing an example of an intermediate product used for forming a display device.
  • FIG. 25 is a diagram illustrating an example of an intermediate product used to form a display device.
  • FIG. 26 is a diagram illustrating an example of an intermediate product used for forming a display device.
  • FIG. 30 is a cross-sectional view showing a modification of the intermediate product shown in FIG. 31 is a cross-sectional view showing a modification of the intermediate product shown in FIG.
  • FIG. 32 is a cross-sectional view showing an example of a touch panel sensor integrated color filter.
  • 33 is a cross-sectional view showing a display device including the touch panel sensor integrated color filter shown in FIG.
  • FIG. 34 is a cross-sectional view showing a display device according to a ninth embodiment of the present invention.
  • FIG. 35 is a diagram showing an example of an intermediate product used for forming a display device.
  • FIG. 36 is a sectional view showing a display front plate according to the tenth embodiment of the present invention.
  • FIG. 37 is a cross-sectional view illustrating an example of a display device including a display front plate having a touch panel sensor.
  • FIG. 38 is a sectional view showing a display front plate according to a modification of the tenth embodiment of the present invention.
  • FIG. 39 is a sectional view showing a display front plate according to a modification of the tenth embodiment of the present invention.
  • FIG. 40 is a cross-sectional view showing a display front plate according to a modification of the tenth embodiment of the present invention.
  • 41 is a cross-sectional view showing an example in which the display front plate shown in FIG. 36 further includes a polarizing plate.
  • FIG. 42 is a cross-sectional view showing an example in which the display front plate shown in FIG. 41 further has a color filter.
  • FIG. 38 is a sectional view showing a display front plate according to a modification of the tenth embodiment of the present invention.
  • FIG. 39 is a sectional view showing a display front plate according to
  • FIG. 43 is a cross-sectional view showing a display front plate formed integrally with a sensor portion in an eleventh embodiment of the present invention.
  • 44 is a cross-sectional view showing an example in which the display front plate shown in FIG. 43 further has an adhesive layer.
  • FIG. 45 is a cross-sectional view showing an example in which the display front plate shown in FIG. 43 further has a signal processing unit.
  • FIG. 46 is a cross-sectional view showing an example in which the display front plate shown in FIG. 44 further has a signal processing unit.
  • 47 is a cross-sectional view showing an example in which the display front plate shown in FIG. 45 further includes a polarizing plate.
  • FIG. 48 is a cross-sectional view showing an example in which the display front plate shown in FIG. 47 further has a color filter.
  • FIG. 49 is a cross-sectional view showing a display device according to a modification of the first embodiment of the present invention.
  • FIG. 50 is a sectional view showing a display device according to a modification of the third embodiment of the present invention.
  • FIG. 51A is a cross-sectional view showing a display front plate according to a modification of the eleventh embodiment of the present invention.
  • FIG. 51B is a cross-sectional view showing one embodiment of the sensor portion and the buffer layer of the display front plate shown in FIG. 51A.
  • FIG. 52A is a cross-sectional view showing an example in which the support member further includes an invisible layer provided on the transparent substrate.
  • FIG. 52B is a cross-sectional view showing an example in which the support member further includes a guard layer provided on the transparent substrate.
  • FIG. 53 is a diagram showing an evaluation result of scratch resistance in an additional example.
  • FIG. 54 is a cross-sectional view showing a method for manufacturing a display front plate using an antireflection film.
  • the display device 70 includes a display unit 50 that generates light for displaying an image and emits the generated light toward an observer, such as an LCD, a PDP, and an organic EL.
  • the display front plate 40 is disposed on the viewer side with respect to the display unit 50.
  • the display unit 50 and the display front plate 40 may be partitioned into a display area for displaying an image and a non-display area located at the periphery of the display area.
  • the display front plate 40 is provided to protect the display unit 50.
  • the display front plate 40 includes a transparent substrate 20 having a substantially rectangular shape, a buffer layer 60 provided on the observer side of the transparent substrate 20, and an antireflection film 30 provided on the observer side of the buffer layer 60. It is equipped with.
  • the transparent substrate 20 functions as a protective member that protects the display unit 50 and also functions as a support member that supports the buffer layer 60.
  • the antireflection film 30 is the outermost layer (film) on the viewer side.
  • film is a concept including members and parts that can also be called layers.
  • the material of the transparent substrate 20 is not particularly limited as long as the light from the display unit 50 can be extracted to the outside.
  • glass, polymer, or the like is used as a material for the transparent substrate 20 in consideration of light transmittance, durability, and the like.
  • glass is used as the material of the transparent substrate 20, and its optical refractive index is, for example, 1.50.
  • the thickness of the transparent substrate 20 is appropriately set according to the strength required for the display front plate 40, the dimensions of the display unit 50, and the like, but is in the range of 0.1 to 1.5 mm, for example.
  • the light refractive index is the refractive index for light having a wavelength of 550 nm.
  • the method for measuring the refractive index is not particularly limited, and examples thereof include a method of calculating from a spectral reflection spectrum, a method of measuring using an ellipsometer, and an Abbe method.
  • An example of the ellipsometer is UVSEL manufactured by Joban-Evon.
  • the refractive index in this case is a value measured with DF1030R manufactured by Techno Synergy.
  • the thickness specified in this specification is a thickness obtained by a general measurement method. For example, as a method for measuring the thickness, there are a stylus type method for calculating the thickness by tracing the surface with a stylus and detecting an unevenness, an optical method for calculating the thickness based on the spectral reflection spectrum, and the like. it can.
  • the thickness was measured using a stylus film thickness meter P-15 manufactured by KLA-Tencor Corporation.
  • the average value of the thickness measurement result in several places of the member used as object may be used.
  • the antireflection film 30 is a film provided to reduce reflection of external light on the outermost surface on the viewer side of the display device 70. As shown in FIG. 1, the antireflection film 30 has a low refractive index layer 31 located on the outermost surface on the viewer side.
  • the light refractive index of the low refractive index layer 31 is smaller than the light refractive index of the transparent substrate 20 in order to reduce reflection of external light in the antireflection film 30.
  • the light refractive index of the low refractive index layer 31 is smaller than 1.50 which is the light refractive index of the transparent substrate 20 made of glass, and preferably smaller than 1.35. Yes. Thereby, reflection of external light in the antireflection film 30 can be reduced.
  • the material constituting such a low refractive index layer 31 is not particularly limited as long as it has optical transparency and a desired optical refractive index is realized, and a known material is used.
  • a fluororesin such as polychlorotrifluoroethylene (PCTFE), polytetrafluoroethylene (PTFE), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), or the like is used. it can.
  • a low refractive index layer containing a fluorine-containing vinyl monomer polymerization unit and a polymerization unit having an ethylenically unsaturated group in the side chain as disclosed in JP-A-2005-43749 is used. May be.
  • the thickness of the low refractive index layer 31 is substantially smaller than 1 ⁇ 4 of the wavelength of visible light.
  • the thickness of the low refractive index layer 31 is in the range of 90 to 120 nm. This can prevent light interference in the low refractive index layer 31.
  • the buffer layer 60 is provided to relieve the stress when an external stress is applied to the low refractive index layer 31 of the antireflection film 30.
  • the buffer layer 60 has a predetermined elastic deformation characteristic and a predetermined hardness. For this reason, while the stress is applied to the low refractive index layer 31, the buffer layer 60 is elastically deformed so that the stress applied to the low refractive index layer 31 can be appropriately relaxed, and the stress is removed. After that, the shape of the buffer layer 60 is elastically restored to the original shape, whereby the shape of the low refractive index layer 31 can be substantially restored. Thereby, it is possible to prevent the low refractive index layer 31 from being broken and the low refractive index layer 31 from being left depressed.
  • the light refractive index of the buffer layer 60 is set to be larger than the light refractive index of the low refractive index layer 31 of the antireflection film 30.
  • the buffer layer 60 is configured such that the light refractive index of the buffer layer 60 is larger than the light refractive index of the low refractive index layer 31, thereby providing the buffer layer 60 with greater scratch resistance than the low refractive index layer 31. can do.
  • the low refractive index layer 31 can be prevented from being broken, and the low refractive index layer 31 can be kept from being depressed.
  • the thickness of the buffer layer 60 is preferably 0.5 ⁇ m or more, more preferably 1 ⁇ m or more.
  • the stress applied to the low refractive index layer 31 can be moderated appropriately.
  • the Vickers hardness when the Vickers indenter is pushed into the buffer layer 60 with a load of 5 mN is preferably in the range of 50 to 100, more preferably in the range of 60 to 90. Thereby, an appropriate strength can be imparted to the buffer layer 60.
  • the Vickers hardness is a Vickers hardness defined in JIS Z 2244, and is measured, for example, as follows.
  • a buffer layer 60 having a thickness of 2.5 ⁇ m is provided on a suitable substrate, for example, a glass plate having a thickness of 1.1 mm.
  • a Vickers indenter is pushed into the buffer layer 60 with a load of 5 mN.
  • the loading time, holding time, and weight loss time of the Vickers indenter are, for example, 20 seconds, 5 seconds, and 20 seconds, respectively.
  • the area of the dent formed in the buffer layer 60 is measured. Such measurement is performed a plurality of times, for example, three times, and the Vickers hardness of the buffer layer 60 is calculated based on the average value of the measured area of the recesses.
  • the ratio of the elastic deformation amount of the buffer layer 60 to the total deformation amount of the buffer layer 60 when the Vickers indenter is pushed into the buffer layer 60 with a load of 5 mN as described above is 0.55 or more. More preferably, it is 0.60 or more. Thereby, it is possible to prevent the low refractive index layer 31 from being broken and the low refractive index layer 31 from being left depressed.
  • the “ratio of elastic deformation” is calculated as follows.
  • the buffer layer 60 When the Vickers indenter is pushed into the buffer layer 60 with a load of 5 mN, the buffer layer 60 is deformed by drawing a hysteresis curve (indentation load-deformation amount) as shown in FIG. As shown in FIG. 3, after the buffer layer 60 is deformed from the initial point O 1 where the indentation load is “0” to the intermediate point O 2 where the indentation load is 5 mN, a predetermined distance from the intermediate point O 2 to the intermediate point O 3 is obtained. The indentation load of 5 mN is held for the holding time, and then the indentation load is released. Thereby, finally, the deformation amount of the buffer layer 60 reaches the final point O 4 .
  • a hysteresis curve indentation load-deformation amount
  • the deformation amount of the final point O 4 is “0”, but actually the buffer layer 60 is not a complete elastic body, and at the final point O 4 .
  • the amount of deformation remains as a positive amount. This amount is the amount of plastic deformation. If the amount of deformation at the time when the indentation by the Vickers indenter is finished (intermediate point O 3 ) is the total amount of deformation, the amount obtained by subtracting the amount of plastic deformation from this total amount of deformation The amount of elastic deformation. Using the respective deformation amounts thus defined, the “ratio of elastic deformation amount” is defined as (elastic deformation amount) / (total deformation amount).
  • the measuring device for measuring the above-mentioned Vickers hardness, total deformation amount, and elastic deformation amount in the buffer layer 60 is not particularly limited.
  • a microhardness meter device name: Fisherscope H-100 Fisher Instruments Co., Ltd.
  • the Vickers indenter, measuring instrument, and analysis software included in the measuring device are, for example, as follows.
  • Indenter Diamond pyramid indenter (tip facing angle 136 °)
  • Measuring instrument HU-100 (Fisher Instruments Inc.)
  • Analysis software WIN-HCU (Fisher Instruments Inc.) Based on the result of evaluating the physical properties of the buffer layer 60 using such a measuring device, the ratio of the elastic deformation amount and the Vickers hardness are calculated by the analysis software.
  • the light refractive index of the buffer layer 60 is set so that the absolute value of the difference from the light refractive index of the transparent substrate 20 is 0.03 or less.
  • the optical refractive index of the buffer layer 60 is set within a range of 1.47 to 1.53. Accordingly, it is possible to prevent light from being reflected at the interface between the buffer layer 60 and the transparent substrate 20.
  • the material of the buffer layer 60 is selected so as to have a predetermined light transmittance and satisfy the above-described characteristics.
  • an acrylic resin, an epoxy resin, a novolac resin, or the like is used as a material for the buffer layer 60.
  • examples of the acrylic resin include urethane acrylate, epoxy acrylate, polyester acrylate, polyol acrylate, polyether acrylate, and melamine acrylate.
  • the method for obtaining the resin used as the material of the buffer layer 60 is not particularly limited.
  • it can be obtained by blending a photopolymerization initiator with an organic material such as a monomer, oligomer, or polymer that can form the resin.
  • a urethane acrylate resin is obtained by reacting a polyester polyol with an isocyanate monomer or a prepolymer, and reacting the resulting product with an acrylate or methacrylate monomer having a hydroxyl group.
  • a photoinitiator a benzophenone derivative, an acetophenone derivative, an anthraquinone derivative etc. are used individually or in combination, for example.
  • a transparent substrate 20 is prepared (see FIG. 2A).
  • the buffer layer 60 is formed on the observer side of the transparent substrate 20 (the upper side in FIG. 2B).
  • a specific method for forming the buffer layer 60 is not particularly limited.
  • the buffer layer 60 can be formed by applying a coating solution containing a material for the buffer layer 60 onto the transparent substrate 20.
  • the coating solution may be applied over the entire area of the transparent substrate 20 by a wet method such as a die coating method, a spin coating method, or a dip coating method, or may be applied in a spot shape on the transparent substrate 20 by an inkjet method. Also good.
  • a coating method a known printing method such as gravure printing, offset printing, silk screen printing, or the like may be used.
  • a coating liquid is comprised by mixing solid content which consists of the material for the above-mentioned buffer layers 60, and a suitable solvent.
  • the ratio of the solid content to the entire coating solution is appropriately set depending on the coating method, but is preferably in the range of 5 to 30% by weight, and more preferably about 20% by weight.
  • a sheet-like or film-like buffer layer 60 may be prepared and attached to the transparent substrate 20 via an adhesive layer such as an adhesive or a tape. In this case, the buffer layer 60 protruding from the transparent substrate 20 may be appropriately cut.
  • the buffer layer 60 when the buffer layer 60 is formed by apply
  • “directly” means that the buffer layer 60 is at least partially in contact with the surface of the transparent substrate 20.
  • the low refractive index layer 31 is formed on the observer side of the buffer layer 60 (see FIG. 2C). Thereby, the antireflection film 30 made of the low refractive index layer 31 is formed on the observer side of the buffer layer 60.
  • the specific method for forming the low refractive index layer 31 is not particularly limited.
  • the low refractive index layer 31 can be formed by applying a coating solution containing a material for the low refractive index layer 31 on the buffer layer 60.
  • the coating solution may be applied over the entire area of the buffer layer 60 by a wet method such as a die coating method, a spin coating method, or a dip coating method, or is applied to the buffer layer 60 in a dot shape by an inkjet method. Also good.
  • a coating method a known printing method such as gravure printing, offset printing, silk screen printing, or the like may be used.
  • the coating solution is configured by mixing a solid content made of the material for the low refractive index layer 31 and an appropriate solvent. The ratio of the solid content with respect to the entire coating solution is appropriately set depending on the coating method, but is preferably in the range of 0.5 to 10% by weight, more preferably in the range of 1 to 5% by weight.
  • a sheet-like or film-like low refractive index layer 31 may be prepared and attached to the buffer layer 60 through an adhesive layer such as an adhesive or a tape.
  • the low refractive index layer 31 protruding from the transparent substrate 20 may be appropriately cut.
  • the low refractive index layer 31 is formed by applying a coating liquid containing a material for the low refractive index layer 31 on the buffer layer 60, the low refractive index layer 31 is provided directly on the buffer layer 60. Will be.
  • “directly” means that the low refractive index layer 31 is at least partially in contact with the surface of the buffer layer 60.
  • the buffer layer 60 or the low refractive index layer 31 is formed by a wet method, the buffer layer 60 or the low refractive index layer 31 is exposed after being dried, heated after being dried, or dried. Then, it is cured by being exposed and heated, or only dried.
  • the material for the buffer layer 60 or the material for the low refractive index layer 31 contains an ultraviolet curable resin
  • curing is achieved by exposing the buffer layer 60 or the low refractive index layer 31.
  • the patternability based on exposure and development may be implement
  • the thermosetting resin is contained in the material for the buffer layer 60 or the material for the low refractive index layer 31, curing is achieved by heating the buffer layer 60 or the low refractive index layer 31.
  • the transparent substrate 20, the buffer layer 60 provided on the observer side of the transparent substrate 20, and the antireflection film 30 provided on the observer side of the buffer layer 60 are provided before display.
  • the face plate 40 is manufactured.
  • the display device 70 is manufactured by arranging and attaching the display front plate 40 thus manufactured to the viewer side of the display unit 50 (see FIG. 1).
  • FIGS. 4A and 4B are diagrams for explaining the effect of the present embodiment, and are diagrams showing a state in which the pressing body 80 is pushed into the display front plate 40 according to the present embodiment.
  • FIGS. 5A (a) and 5 (b) are views showing a state in which the pressing body 80 is pushed into the display front plate 90 according to the first comparative embodiment, and FIGS. 5B (a) and 5 (b) show the second comparison. It is a figure which shows a mode that the press body 80 is pushed in into the display front board 95 by the form.
  • a display front plate 90 according to a first comparison mode will be described with reference to FIGS. 5A (a) and 5 (b).
  • the display front plate 90 according to the first comparative embodiment is different only in that the buffer layer 60 is not provided, and the other configuration is the display front plate according to the present embodiment shown in FIGS. 1 and 2. 40.
  • FIG. 5A (a) is a diagram showing the display front plate 90 in a state where the pressing body 80 is pushed in
  • FIG. 5A (b) shows the display front plate 90 after the pressing body 80 is removed.
  • FIG. As shown in FIGS. 5A (a) and 5 (b), the display front plate 90 is not provided with the buffer layer 60.
  • the transparent substrate 20 is made of a hard material such as glass. For this reason, the stress applied to the low refractive index layer 31 from the pressing body 80 is not relieved, and therefore, as shown in FIGS. 5A (a) and 5 (b), the fracture portion 91 is formed in the low refractive index layer 31. Can be considered.
  • the ratio of the Vickers hardness and the amount of elastic deformation of the buffer layer 97 of the display front plate 95 is the buffer layer 60 of the display front plate 40 according to the present embodiment. It is smaller than the ratio of the Vickers hardness and the amount of elastic deformation.
  • FIG. 5B (a) is a diagram showing the display front plate 95 in a state where the pressing body 80 is pushed in
  • FIG. 5B (b) shows the display front plate 95 after the pressing body 80 is removed.
  • FIG. 5B (a) the display front plate 95 is provided with a buffer layer 97. Therefore, the stress applied from the pressing body 80 to the low refractive index layer 31 can be relaxed.
  • the ratio of the Vickers hardness and the amount of elastic deformation of the buffer layer 97 is smaller than the ratio of the Vickers hardness and the amount of elastic deformation of the buffer layer 60 of the display front plate 40 according to the present embodiment. For this reason, after the pressing body 80 is removed, the shape of the buffer layer 97 is not restored, and the recess 96 is formed in the buffer layer 97 and the low refractive index layer 31 as shown in FIG. 5B (b). It remains.
  • the buffer layer 60 is interposed between the low refractive index layer 31 of the antireflection film 30 and the transparent substrate 20 .
  • the buffer layer 60 has a thickness of 0.5 ⁇ m or more. Further, the Vickers hardness when the Vickers indenter is pushed into the buffer layer 60 with a load of 5 mN is in the range of 50 to 100, and the buffer layer 60 with respect to the total deformation amount of the buffer layer 60 at that time. The ratio of the amount of elastic deformation is 0.55 or more. For this reason, as shown to Fig.4 (a), the stress applied to the low-refractive-index layer 31 from the press body 80 can be relieve
  • the optical refractive index of the buffer layer 60 is set so that the absolute value of the difference from the optical refractive index of the transparent substrate 20 is 0.03 or less. Accordingly, it is possible to suppress an increase in light reflection due to the provision of the buffer layer 60 between the low refractive index layer 31 of the antireflection film 30 and the transparent substrate 20.
  • the buffer layer 60 is provided on the observer side of the transparent substrate 20 and the antireflection film 30 is provided on the observer side of the buffer layer 60. It was. However, the present invention is not limited to this, and as shown in FIG. 49, the buffer layer 60 is provided on the display unit side of the transparent substrate 20, and the antireflection film 30 is provided on the display unit 50 side of the buffer layer 60. Also good. In this case, as shown in FIG. 49, the low refractive index layer 31 of the antireflection film 30 is located on the outermost surface of the antireflection film 30 on the display unit 50 side.
  • the “observer side” means a surface facing the observer when the display front plate 40 is arranged with respect to the display unit 50.
  • the “display unit side” means a surface facing the display unit 50 when the display front plate 40 is arranged with respect to the display unit 50.
  • the antireflection film 30 of the display front plate 40 can prevent light from the display unit 50 from being reflected on the display unit 50 side of the display front plate 40, and as a result, the display The light transmittance in the front plate 40 can be improved. Further, the stress applied to the low refractive index layer 31 of the antireflection film 30 during the manufacturing process of the display device 70 can be appropriately relaxed by the buffer layer 60. Thereby, the antireflection film 30 can be prevented from being damaged.
  • FIG. 6 is an enlarged view showing the low refractive index layer 31 of the antireflection film 30 in the display front plate 40 according to the second embodiment of the present invention.
  • the low refractive index layer 31 includes a binder resin portion 31a and a plurality of hollow fillers 31b dispersed in the binder resin portion 31a.
  • the hollow filler 31b is filled with air or the like. For this reason, the optical refractive index of the low refractive index layer 31 as a whole is lower than that when the low refractive index layer 31 is composed only of the binder resin portion 31a. It has become.
  • the material of the binder resin portion 31a is not particularly limited, for example, the fluororesin mentioned as the material of the low refractive index layer 31 in the above-described first embodiment is appropriately used.
  • the hollow filler 31b hollow glass beads or the like are used.
  • the volume ratios of the binder resin portion 31a and the hollow filler 31b in the low refractive index layer 31 are appropriately set so that the light refractive index of the low refractive index layer 31 as a whole is smaller than 1.35.
  • the optical refractive index of the low refractive index layer 31 as a whole is obtained by multiplying the optical refractive index of the binder resin portion 31a by the volume ratio of the binder resin portion 31a and the optical refractive index of the hollow filler 31b. It is derived by adding the value calculated by multiplying the volume ratio of the hollow filler 31b.
  • the low refractive index layer 31 includes a binder resin portion 31a and a plurality of hollow fillers 31b dispersed in the binder resin portion 31a. For this reason, the optical refractive index as the low refractive index layer 31 whole can be made lower. As a result, the effect of the antireflection film 30 preventing reflection of external light can be further enhanced.
  • the buffer layer 60 is interposed between the low refractive index layer 31 of the antireflection film 30 and the transparent substrate 20. For this reason, even when the low refractive index layer 31 having low scratch resistance such as the hollow filler 31b is used, the buffer layer 60 relieves stress applied to the low refractive index layer 31 from the outside. be able to. This can prevent the antireflection film 30 from being damaged by external stress.
  • FIG. 7 is a cross-sectional view showing a display device according to the third embodiment of the present invention.
  • the third embodiment shown in FIG. 7 is different only in that the antireflection film further includes a high refractive index layer provided on the display unit side of the low refractive index layer. Or substantially the same as that of the first embodiment shown in FIGS.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 4 (a) and (b) are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the antireflection film 30 includes a low refractive index layer 31 located on the outermost surface on the viewer side, a high refractive index layer 32 provided on the display unit 50 side of the low refractive index layer 31, and Is included.
  • the optical refractive index of the high refractive index layer 32 is larger than the optical refractive indexes of the transparent substrate 20 and the low refractive index layer 31.
  • the optical refractive index of the high refractive index layer 32 is not particularly limited as long as it is higher than the optical refractive indexes of the transparent substrate 20 and the low refractive index layer 31, but is in the range of 1.55 to 2.20, for example. .
  • a material constituting the high refractive index layer 32 a known material having a high light refractive index can be used, and for example, a material as disclosed in JP-A-2005-43749 can be used.
  • the thickness of the high refractive index layer 32 is in the range of 20 to 300 nm, for example.
  • the antireflection film 30 includes the low refractive index layer 31 and the high refractive index layer 32 is shown, but the present invention is not limited to this.
  • the antireflection film 30 may include other various layers.
  • a medium refractive index layer (not shown) having a light refractive index larger than the light refractive index of the low refractive index layer 31 and smaller than the light refractive index of the high refractive index layer 32 is used. It may be provided on the display unit 50 side.
  • an undercoat layer, a hard coat layer, or the like may be provided on the outermost surface of the antireflection film 30 on the display unit 50 side.
  • the buffer layer 60 is provided on the display unit side of the transparent substrate 20
  • the antireflection film 30 may be provided on the display unit 50 side of the buffer layer 60.
  • the high refractive index layer 32 of the antireflective film 30 is provided on the observer side of the low refractive index layer 31.
  • FIG. 8 is a cross-sectional view showing a display device according to the fourth embodiment of the present invention.
  • the display front plate includes an additional buffer layer provided on the display unit side of the transparent substrate, an additional antireflection film provided on the display unit side of the additional buffer layer,
  • the other configuration is substantially the same as that of the first embodiment shown in FIGS. 1 to 4A and 4B.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 4 (a) and (b) are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the display front plate 40 includes a buffer layer 60 provided on the observer side of the transparent substrate 20, an antireflection film 30 provided on the observer side of the buffer layer 60, and the transparent substrate 20.
  • the additional buffer layer 65 provided on the display unit 50 side, and the additional antireflection film 35 provided on the display unit 50 side of the additional buffer layer 65 are provided.
  • the additional antireflection film 35 has an additional low refractive index layer 36 located on the outermost surface on the display unit 50 side.
  • the additional buffer layer 65, the additional antireflective film 35, and the additional low refractive index layer 36 are substantially the same as the buffer layer 60, the antireflective film 30, and the low refractive index layer 31 in the first embodiment. Is omitted.
  • the additional antireflection film 35 is provided not only on the observer side of the transparent substrate 20 but also on the display unit 50 side.
  • the display front plate 40 not only prevents external light from being reflected on the viewer side of the display front plate 40, but also the light from the display unit 50 on the display unit 50 side of the display front plate 40. It can prevent reflection.
  • the additional buffer layer 65 is interposed between the transparent substrate 20 and the additional antireflection film 35, whereby the additional antireflection film 35 can be prevented from being damaged.
  • the antireflection film 30 is composed of only the low refractive index layer 31 and the additional antireflection film 35 is composed of only the additional low refractive index layer 36.
  • the antireflection film 30 or the additional antireflection film 35 may include other various layers as in the case of the third embodiment described above.
  • a high refractive index layer 32 having a light refractive index larger than the light refractive index of the low refractive index layer 31 may be provided on the display unit 50 side of the low refractive index layer 31.
  • an additional high refractive index layer 37 having a light refractive index larger than that of the additional low refractive index layer 36 may be provided on the viewer side of the additional low refractive index layer 36.
  • a design layer for improving design properties may be appropriately formed.
  • the design layer 10 may be formed in a non-display area on the viewer side of the display front plate 40.
  • a hard coat layer or an undercoat layer for protecting the transparent substrate 20 or the buffer layer 60 may be provided between the transparent substrate 20 and the buffer layer 60. Good.
  • FIGS. 11 to 13 differs only in that the display front plate further has an adhesive layer, and the other configurations are the first shown in FIGS. 1 to 4A and 4B. This is substantially the same as the embodiment.
  • the display front plate 40 according to the present embodiment is the same as the display front plate 40 manufactured at one manufacturer or the manufacturing site. It is configured assuming that it is combined with a protective layer or the like.
  • the display front plate 40 includes a transparent substrate 20, a buffer layer 60 provided on the observer side of the transparent substrate 20, and an observer side of the buffer layer 60. And an adhesive layer (observer side adhesive layer) 100 provided on the observer side of the antireflection film 30.
  • the antireflection film 30 has a low refractive index layer 31 located on the outermost surface on the viewer side.
  • the phrase “low refractive index layer 31 positioned on the outermost surface on the viewer side” means that when the antireflection film 30 is composed of a plurality of layers, the layer positioned on the outermost surface on the viewer side among these layers. Means that the low refractive index layer 31 is formed.
  • the phrase “low refractive index layer 31 positioned on the outermost surface on the viewer side” is a form in which other layers such as the adhesive layer 100 are further provided on the viewer side of the antireflection film 30 on the display front plate 40. Is not excluded.
  • the adhesive layer 100 provided on the observer side of the transparent substrate 20 is a layer provided for bringing the display front plate 40 into close contact with a member such as a protective layer that can be disposed on the viewer side of the display front plate 40.
  • a member such as a protective layer that can be disposed on the viewer side of the display front plate 40.
  • the material constituting the adhesive layer 100 is appropriately selected according to the member combined with the display front plate 40 and the usage environment of the display front plate 40.
  • a pressure-sensitive adhesive silicone pressure-sensitive adhesive
  • a polyorganosiloxane composition having a desired plasticity for example, a polyorganosiloxane composition described in JP-A-2004-212521
  • an acrylic pressure-sensitive adhesive for example, special A transparent pressure-sensitive adhesive sheet made of an acrylic pressure-sensitive adhesive described in Japanese Unexamined Patent Publication No. 2002-348546 is used as the adhesive layer 100.
  • Such a transparent pressure-sensitive adhesive sheet is, for example, a sheet obtained by crosslinking an acrylic ester copolymer with an epoxy-based, isocyanate-based, melamine-based or metal compound-based crosslinking agent, or an ultraviolet curable acrylic pressure-sensitive adhesive. It is obtained by processing.
  • the thickness of the adhesive layer 100 is appropriately selected according to the material used, the member combined with the display front plate 40, the usage environment of the display front plate 40, and the like, but is within the range of 1 to 200 ⁇ m, for example. .
  • the adhesive layer 100 of the display front plate 40 may be covered with a film made of PET or the like. As a result, the adhesive force of the adhesive layer 100 can be prevented from deteriorating, and the handling of the display front plate 40 can be improved.
  • a protective layer 105 may be provided in advance on the viewer side of the adhesive layer 100 provided on the viewer side of the antireflection film 30.
  • This protective layer 105 is a layer provided with the intention of preventing fragments of the transparent substrate 20 from scattering even if the transparent substrate 20 of the display front plate 40 is damaged.
  • the material of the protective layer 105 include a photo-curing resin type, a thermosetting resin type, a two-component mixed reaction liquid type, and a double-sided adhesive seal type material. Among these, in the photo-curing resin type, a radical curing material or a cationic curing material is used.
  • the radical curable materials include acrylic, ene / thiol, and vinyl ether materials
  • the cationic curable materials include epoxy, oxetane, and vinyl ether materials.
  • Thermosetting resin type materials include epoxy-based, phenol-based, and polyester-based materials.
  • the adhesive layer 100 may be positioned on the display unit side of the display front plate 40.
  • the display front plate 40 may have an adhesive layer (display unit side adhesive layer) 100 located on the outermost surface on the display unit side.
  • the antireflection film 30 is composed only of the low refractive index layer 31.
  • the antireflection film 30 may further include a high refractive index layer 32 as in the case of the third embodiment described above.
  • the display front plate 40 may further include an additional buffer layer 65 and an additional antireflection film 35.
  • the adhesive layer 100 may be provided on the display unit side of the additional antireflection film 35.
  • FIG. 14 and FIG. 15 differs only in that the additional low refractive index layer of the additional antireflection film is increased in hardness, and the other configuration is the fourth configuration shown in FIG. This is substantially the same as the embodiment.
  • the same parts as those in the fourth embodiment shown in FIG. 14 and FIG. 15 the same parts as those in the fourth embodiment shown in FIG.
  • the display front plate 40 includes a buffer layer 60 provided on the observer side of the transparent substrate 20, and an antireflection film 30 provided on the observer side of the buffer layer 60.
  • the additional buffer layer 65 provided on the display unit 50 side of the transparent substrate 20 and the additional antireflection film 35 provided on the display unit 50 side of the additional buffer layer 65 are provided.
  • the antireflection film 30 has a low refractive index layer 31 positioned on the outermost surface of the antireflection film 30 on the viewer side, and the additional antireflection film 35 is on the display unit side of the additional antireflection film 35.
  • an additional low refractive index layer 36A located on the outermost surface of the.
  • the present embodiment is characterized in that the scratch resistance of the additional low refractive index layer 36A of the additional antireflection film 35 is higher than the scratch resistance of the low refractive index layer 31 of the antireflection film 30.
  • the scratch resistance of the additional low refractive index layer 36A of the additional antireflection film 35 is higher than the scratch resistance of the low refractive index layer 31 of the antireflection film 30.
  • the transparent substrate 20 is prepared first, and then the first layer is formed on the upper side (one side) of the transparent substrate 20. Thereafter, the transparent substrate 20 on which the first layer is formed is turned upside down, and then the second layer is formed on the upper side (the other side) of the transparent substrate 20. Therefore, when the second layer is formed, the first layer is located below the transparent substrate 20. For this reason, while the second layer is formed, the first layer comes into contact with a manufacturing facility such as a transport table, and the first layer may be damaged during this period.
  • a manufacturing facility such as a transport table
  • the additional antireflection film 35, the buffer layer 60, and the additional buffer layer 65 are formed on the transparent substrate 20, first, on the upper side (display unit side) of the transparent substrate 20.
  • the additional buffer layer 65 and the additional antireflection film 35 are formed, then the transparent substrate 20 is turned upside down, and then the antireflection film 30 and the buffer layer 60 are formed on the upper side (observer side) of the transparent substrate 20.
  • the scratch resistance of the additional low refractive index layer 36 ⁇ / b> A of the additional antireflection film 35 is higher than the scratch resistance of the low refractive index layer 31 of the antireflection film 30.
  • the additional low refractive index layer 36A of the additional antireflective film 35 is in contact with manufacturing equipment such as a transport table while the antireflection film 30 and the buffer layer 60 are formed, the additional low refractive index layer 36 is damaged. Can be prevented.
  • the optical refractive index of the additional low refractive index layer 36A is low refractive index. It is set to a value larger than the light refractive index of the refractive index layer 31 and smaller than the light refractive index of the transparent substrate 20, for example, 1.45. Thereby, it is possible to impart higher scratch resistance to the additional low refractive index layer 36 ⁇ / b> A than the low refractive index layer 31.
  • Such an additional low refractive index layer 36A is preferably a case where steel wool (No. 0000) loaded with 600 g is swept over the additional low refractive index layer 36A (10 reciprocations, 100 mm stroke).
  • the additional low refractive index layer 36A after sweeping has scratch resistance such that scratch marks are not visually recognized.
  • the additional low refractive index layer 36A is configured such that the reflectance of the additional low refractive index layer 36A is higher than the reflectance of the low refractive index layer 31, thereby reducing the scratch resistance of the additional low refractive index layer 36A. It can also be made higher than the scratch resistance of the rate layer 31.
  • the low refractive index layer 31 and the additional low refractive index layer 36A are set so that the reflectance of the low refractive index layer 31 is 1% or less and the reflectance of the additional low refractive index layer 36A is in the range of 1 to 2%. May be configured.
  • the additional antireflection film 35 having the additional low refractive index layer 36A with enhanced scratch resistance is used as described above, the scratch resistance of the display front plate 40 on the display unit side is determined by the additional low refractive index layer 36A. Sufficiently secured. Therefore, when the additional antireflection film 35 having the additional low refractive index layer 36A is used, the additional buffer layer 65 is not provided between the transparent substrate 20 and the additional antireflection film 35 as shown in FIG. Also good. Thereby, the formation process of the additional buffer layer 65 in the manufacturing process of the display front plate 40 can be reduced. Thus, the productivity of the display front plate 40 can be improved while ensuring the scratch resistance of the display front plate 40 on the display unit side.
  • the additional antireflection film 35 is composed of only the additional low refractive index layer 36A.
  • the additional antireflection film 35 may further include an additional high refractive index layer 37 as in the case of the modification of the fourth embodiment described above.
  • the antireflection film 30 may further include a high refractive index layer 32.
  • the adhesive layer 100 may be provided on the viewer side of the antireflection film 30 or the display unit side of the additional antireflection film 35.
  • the protective layer 105 may be provided on the observer side of the adhesive layer 100 provided on the observer side of the antireflection film 30.
  • FIGS. 16 to 20 The present embodiment shown in FIGS. 16 to 20 is different only in that the display unit of the display device has a touch panel sensor, and other configurations are the first shown in FIGS. 1 to 4A and 4B. This is substantially the same as the embodiment.
  • the seventh embodiment shown in FIG. 16 to FIG. 20 the same parts as those in the first embodiment shown in FIG. 1 to FIG. 4A and FIG. To do.
  • the display device 70 includes a display unit 50 and a display front plate 40 arranged on the viewer side with respect to the display unit 50.
  • the display front plate 40 any one of the display front plates 40 shown in the first to sixth embodiments described above is appropriately used.
  • the display unit 50 is provided on the viewer side of the display unit 151 that emits light for displaying an image to the viewer side, and the display device 70 is on the viewer side.
  • a touch panel sensor 110 that detects a touch location when touched.
  • various types such as an LCD, a PDP, an organic EL, an inorganic EL, or a field emission type can be used as in the above-described embodiments.
  • the display front plate 40 and the display unit 50 when it is desired that the display front plate 40 and the display unit 50 be firmly attached, the display front plate 40 having the adhesive layer 100 positioned on the outermost surface on the display unit side is preferably used. Accordingly, the display front plate 40 and the display unit 50 are firmly adhered to each other, thereby preventing an air gap from being generated between the display front plate 40 and the display unit 50.
  • the display unit 50 may further include an adhesive layer 101 provided on the viewer side of the touch panel sensor 110. Since the display unit 50 has the adhesive layer 101 in advance, the display unit 50 and the display front plate 40 can be firmly adhered to each other, and the display unit 50 and the display front plate 40 are combined. Can be facilitated.
  • touch panel sensor 110 of the display unit 50 will be described in detail.
  • the type of touch panel sensor 110 included in display unit 50 is not particularly limited, and various types of touch panel sensor 110 can be used as appropriate.
  • a resistive touch panel sensor that detects a touch location based on a pressure from a detected object
  • a capacitive touch panel sensor that detects a touch location based on static electricity from a detected body such as a human body is used. Can be.
  • the optical sensor type touch panel sensor is provided with an optical sensor that receives light and performs photoelectric conversion, and is provided on the viewer side so as to face the optical sensor, and selectively transmits light in a specific wavelength range. And a permselective layer.
  • the optical sensor mainly receives light in a specific wavelength range that has passed through the selective transmission layer. And it detects that the to-be-detected body touched the display apparatus 70 from the observer side, when an optical sensor detects the reflected light from to-be-detected bodies, such as a finger.
  • the touch location is detected based on the reflected light from the detected object, so the detected object is not limited to a human body such as a finger, and various objects can be detected. It is possible to detect the touch location. Further details of such an optical sensor type touch panel sensor are described in, for example, Japanese Unexamined Patent Application Publication Nos. 2009-151039 and 2007-192713.
  • FIGS. 18A to 18C are plan views showing the capacitive touch panel sensor 110
  • FIG. 18B is a cross-sectional view of the touch panel sensor 110 of FIG. 18A viewed from the XVIIIB-XVIIIB direction
  • FIG. 18C is a touch panel of FIG. 18A. It is sectional drawing which looked at the sensor 110 from the XVIIIC-XVIIIC direction.
  • the capacitive touch panel sensor 110 includes a touch panel sensor substrate 116 and a plurality of x provided in a predetermined pattern on the viewer side surface of the touch panel sensor substrate 116.
  • the transparent conductive pattern 111 and the y transparent conductive pattern 112 are provided.
  • the x transparent conductive pattern 111 extends in the x direction
  • the y transparent conductive pattern 112 extends in the y direction orthogonal to the x direction.
  • Each x transparent conductive pattern 111 has a plurality of x electrode units 111a having a substantially square shape, and an x connection portion 111b that connects adjacent x electrode units 111a in the x direction.
  • an x transparent conductive pattern 111 the position in the y direction of the touch location of the detection object is detected.
  • Each of the y transparent conductive patterns 112 includes a plurality of y electrode units 112a having a substantially square shape, and a y connection portion 112b that connects adjacent y electrode units 112a in the y direction.
  • Such a y transparent conductive pattern 112 detects the position in the x direction of the touch location of the detection object.
  • the extraction wiring 113 and the extraction wiring 114 which are provided in a predetermined pattern and are electrically connected to the x transparent conductive pattern 111 and the y transparent conductive pattern 112, respectively, and the extraction wiring 113 and the extraction wiring. Terminal portions 115 connected to the wiring 114 and for taking out signals from the x transparent conductive pattern 111 and the y transparent conductive pattern 112 to the outside are provided.
  • a sensor unit 120 that realizes a touch panel function of detecting a touch position and extracting a detection signal to the outside by a combination of the conductive patterns 111 and 112, the extraction wirings 113 and 114, and the terminal unit 115 described above. Is configured.
  • each of the x transparent conductive pattern 111 and the y transparent conductive pattern 112 is disposed in a display area for displaying an image. Therefore, each of the x transparent conductive pattern 111 and the y transparent conductive pattern 112 is made of a material having conductivity and transparency, such as ITO.
  • the extraction wiring 113, the extraction wiring 114, and the terminal portion 115 are arranged in a non-display area located at the periphery of the display area. For this reason, the material which comprises the extraction wiring 113, the extraction wiring 114, and the terminal part 115 does not need to have transparency. Therefore, the lead-out wiring 113, the lead-out wiring 114, and the terminal portion 115 are generally made of a metal material having a higher electrical conductivity than the materials of the x transparent conductive pattern 111 and the y transparent conductive pattern 112.
  • the material of the touch panel sensor substrate 116 is not particularly limited as long as it supports the conductive patterns 111 and 112, the extraction wirings 113 and 114, and the terminal portion 115 and has transparency.
  • glass or polymer having transparency is used as the material for the touch panel sensor substrate 116.
  • the sensor unit 120 including the conductive patterns 111 and 112, the extraction wirings 113 and 114, and the terminal unit 115 is obtained by laminating ITO or a metal material on the touch panel sensor substrate 116. It is formed.
  • an insulating layer 117 is provided between the x connection part 111b and the y connection part 112b in order to prevent the x connection part 111b and the y connection part 112b from being electrically connected. It may be interposed.
  • a protective layer 119 for protecting the conductive patterns 111 and 112, the extraction wirings 113 and 114, and the terminal portion 115 may be provided.
  • the protective layer 119 a resin material having transparency and insulation is used as appropriate.
  • the display unit 50 of the display device 70 has the touch panel sensor 110.
  • a touch panel function can be given to the display device 70.
  • the display front plate 40 according to the first to sixth embodiments described above is provided on the viewer side of the touch panel sensor 110 of the display unit 50.
  • the touch panel sensor 110 can be appropriately protected by the display front plate 40, and the reflection of external light on the viewer side of the display device 70 can be prevented.
  • the present invention is not limited to this, and the sensor unit 120 may be provided on the display unit side surface of the touch panel sensor substrate 116.
  • a part of each component of the sensor unit 120 is provided on the surface of the touch panel sensor substrate 116 on the viewer side, and the other part of each component of the sensor unit 120 is on the display unit side of the touch panel sensor substrate 116. It may be provided on the surface.
  • the x transparent conductive pattern 111 may be provided on the surface of the touch panel sensor substrate 116 on the viewer side
  • the y transparent conductive pattern 112 may be provided on the surface of the touch panel sensor substrate 116 on the display unit side.
  • the touch panel sensor 110 may further include a signal processing unit 125 for processing a signal detected by the sensor unit 120 in addition to the touch panel sensor substrate 116 and the sensor unit 120.
  • the signal processing unit 125 includes, for example, a printed circuit board and a processing IC that is provided on the printed circuit board and analyzes a touch location based on a signal from the sensor unit 120.
  • a wiring may be included in the signal processing unit 125 to extract an electrical signal to the outside. Such wiring may be composed of, for example, a flexible substrate.
  • the signal processing unit 125 is connected to the terminal unit 115 of the sensor unit 120, for example, as indicated by a one-dot chain line in FIG. 18A.
  • the touch panel sensor 110 may further include a signal processing unit 125, and an adhesive layer 101 may be provided between the touch panel sensor 110 and the display front plate 40.
  • FIGS. 21 to 34 the same parts as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 21 is a diagram illustrating an example of the display device 70 including the LCD type display unit 50.
  • the display unit 50 includes an LCD type display unit 151 and a touch panel sensor 110 provided on the viewer side of the display unit 151.
  • the display unit 151 includes a backlight unit 158, a light source side polarizing plate 156 provided on the viewer side of the backlight unit 158, an LCD panel 155 provided on the viewer side of the light source side polarizing plate 156, and an LCD panel And 155 an observer side polarizing plate 154 provided on the observer side.
  • a backlight unit 158 various types of light sources such as fluorescent tubes and LEDs can be used.
  • a reflection plate that reflects light from the fluorescent tube or the LED may be further included outside the fluorescent tube or the LED (on the side opposite to the observer side).
  • an adhesive layer may be interposed between the constituent elements of the display device 70.
  • the LCD panel 155 includes a TFT substrate 210, a color filter 200 provided on the viewer side of the TFT substrate 210, and a liquid crystal layer 215 filled between the TFT substrate 210 and the color filter 200.
  • each of the TFT substrates 210 corresponds to a unit pixel of the display device 70, and includes a plurality of liquid crystal driving units that apply a predetermined voltage to the liquid crystal 215 to control the state of the liquid crystal layer 215.
  • the color filter 200 includes a color filter substrate 201, a black matrix layer 202 provided in a predetermined pattern on the color filter substrate 201, and a plurality of colored layers 203 provided between the black matrix layers 202. Contains.
  • the material of the color filter substrate 201 is not particularly limited as long as it appropriately supports the black matrix layer 202 and the colored layer 203 and has transparency.
  • a material for the color filter substrate 201 transparent glass, polymer, or the like is used.
  • the LCD type display device 70 includes the display unit 50 and the display front plate 40 provided on the viewer side of the display unit 50. For this reason, it is possible to prevent external light from being reflected on the viewer side of the LCD type display device 70.
  • the display unit 50 includes the touch panel sensor 110. Therefore, a touch panel function can be given to the LCD type display device 70.
  • the display unit 151 may further include an optical compensation film 157 provided between the light source side polarizing plate 156 and the backlight unit 158.
  • the optical compensation film 157 is made of, for example, a retardation film, a brightness enhancement film, a light guide plate, or the like. By further providing such an optical compensation film 157, the quality of light incident on the light source side polarizing plate 156 from the backlight unit 158 can be further increased.
  • the optical compensation film 157 may be a component separate from the backlight unit 158 or may be a component included in the backlight unit 158.
  • each component of the display unit 151 such as the observer-side polarizing plate 154 and the LCD panel 155, is the touch panel sensor 110 and the display unit. It may be combined with the front plate 40.
  • the observer-side polarizing plate 154 and the LCD panel 155 may be combined with the touch panel sensor 110 and the display front plate 40, thereby forming an intermediate product 220 for the display device.
  • an observer-side polarizing plate 154, an LCD panel 155, and a light source-side polarizing plate 156 are combined with the touch panel sensor 110 and the display front plate 40, whereby an intermediate product 220 for a display device is formed. It may be configured. As shown in FIG.
  • an observer-side polarizing plate 154, an LCD panel 155, a light source-side polarizing plate 156, and an optical compensation film 157 are combined with the touch panel sensor 110 and the display front plate 40, thereby providing a display device.
  • Intermediate product 220 may be configured.
  • the touch panel sensor 110 is a separate component from the display unit 151, and the touch panel sensor 110 is provided on the viewer side of the LCD panel 155 of the display unit 151.
  • An example is given.
  • the present invention is not limited to this, and the touch panel sensor 110 may be included in the display unit 151, and the touch panel sensor 110 may be provided between the observer-side polarizing plate 154 and the LCD panel 155.
  • FIGS. 27 to 31 are diagrams showing an example of a form in which the touch panel sensor 110 is provided between the observer-side polarizing plate 154 and the LCD panel 155.
  • FIG. The configurations shown in FIGS. 27 to 31 are different from each other only in that the touch panel sensor 110 is provided between the observer-side polarizing plate 154 and the LCD panel 155.
  • Other configurations are the same as those in FIGS. Thru
  • the touch panel sensor 110 is a separate component from the display unit 151” means that the touch panel sensor 110 is transacted and transported separately from the display unit 151. Further, “the touch panel sensor 110 is included in the display unit 151” means that the touch panel sensor 110 is transacted or transported at the same time as the display unit 151.
  • the touch panel sensor 110 is an example in which the touch panel sensor 110 is a separate component from the color filter 200 of the LCD panel 155.
  • the present invention is not limited to this, and the touch panel sensor may be formed integrally with the color filter 200.
  • the touch panel sensor is integrally formed with the color filter” means that the touch panel sensor substrate and the color filter substrate are common, as will be described below with reference to FIG. I mean.
  • FIG. 32 is a view showing a color filter 200A integrated with a touch panel sensor having a touch panel function.
  • the color filter 200A includes a color filter substrate 201, a sensor unit 120 provided on the observation side of the color filter substrate 201, and a black provided on the display unit side of the color filter substrate 201.
  • the sensor unit 120 is substantially the same as the sensor unit 120 in the seventh embodiment shown in FIGS.
  • FIG. 33 is a diagram showing a display device 70 including an LCD panel 155A having a touch panel function.
  • the touch panel sensor is formed integrally with the color filter.
  • the touch panel function can be easily provided by the display device 70.
  • a substrate for the touch panel sensor can be made unnecessary as compared with the case where the color filter 200 and the touch panel sensor 110 are configured separately. Therefore, when the display device 70 with a touch panel function is configured using the touch panel sensor integrated color filter 200A, the thickness and weight of the display device 70 can be reduced by the amount of the substrate for the touch panel sensor.
  • the color filter 200 and the touch panel sensor 110 are comprised separately, it is possible that the color filter 200 and the touch panel sensor 110 are bonded together by an adhesive layer.
  • the light transmittance in the touch panel sensor 110 is reduced by the amount of the adhesive layer.
  • the touch panel sensor and the color filter are integrally formed, thereby eliminating the need for an adhesive layer for bonding. Thereby, the light transmittance can be improved.
  • the process of bonding the color filter 200 and the touch panel sensor 110 using an adhesive layer is not necessary. As a result, the number of manufacturing steps can be reduced, and problems that may occur during bonding can be avoided. For example, it is possible to eliminate the concern that bubbles or the like are mixed at the time of bonding, thereby reducing the yield.
  • display device 70 / display unit 50 / display unit 151 includes / includes / includes touch panel sensor 110
  • touch panel sensor 110 means that display device 70 / display unit 50 / display unit 151 performs transactions independently.
  • the sensor unit 120 is included in predetermined components of the display device 70 / the display unit 50 / the display unit 151 such as a color filter, as well as the case where the touch panel sensor 110 that can be transported is included / included / included. It is also a concept that includes.
  • the ninth embodiment of the present invention will be described with reference to FIGS.
  • a specific configuration example in the case where the display portion of the display device in the first to seventh embodiments is of an organic EL or inorganic EL type will be described.
  • the same components as those in the above-described embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.
  • FIG. 34 is a diagram illustrating an example of a display device 70 including an organic EL or inorganic EL type display unit 50.
  • the display unit 50 includes an organic EL or inorganic EL type display unit 151 and a touch panel sensor 110 provided on the viewer side of the display unit 151.
  • the display unit 151 is provided on the viewer side of the reflective electrode layer 164 and the reflective electrode layer 164, a light emitting layer 163 made of an organic light emitting material or an inorganic light emitting material, and a color filter provided on the viewer side of the light emitting layer 163. 200 and an observer-side polarizing plate 154 provided on the observer side of the color filter 200.
  • an adhesive layer may be interposed between the constituent elements of the display device 70.
  • the organic EL or inorganic EL type display device 70 includes the display unit 50 and the display front plate 40 provided on the viewer side of the display unit 50. For this reason, it is possible to prevent external light from being reflected on the viewer side of the display device 70 of the organic EL or inorganic EL type.
  • the display unit 50 includes the touch panel sensor 110. For this reason, a touch panel function can be provided to the organic EL or inorganic EL type display device 70.
  • each component of the display unit 151 such as the observer-side polarizing plate 154 and the color filter 200, is the touch panel sensor 110 and the display unit. It may be combined with the front plate 40.
  • the observer-side polarizing plate 154, the color filter 200, and the light emitting layer 163 are combined with the touch panel sensor 110 and the display front plate 40, thereby forming an intermediate product 220 for the display device. May be.
  • a touch panel sensor integrated color filter 200A having a touch panel function may be used as in the case of the embodiments shown in FIGS. Thereby, the touch panel function can be easily provided by the display device 70.
  • the touch panel sensor 110 may be provided on the display unit side of the observer-side polarizing plate 154 as in the case of the embodiments shown in FIGS.
  • FIGS. 36 to 40 The present embodiment shown in FIGS. 36 to 40 is different only in that the display front plate has a touch panel sensor. Other configurations are the same as the first embodiment shown in FIGS. 1 to 4A and 4B. This is substantially the same as the embodiment.
  • the same parts as those in the first embodiment shown in FIGS. 1 to 4A and 4B are denoted by the same reference numerals, and detailed description thereof is omitted. To do.
  • the display front plate 40A is provided on the transparent substrate 20, the buffer layer 60 provided on the observer side of the transparent substrate 20, and the observer side of the buffer layer 60.
  • the anti-reflection film 30 and the touch panel sensor 110 provided on the display unit side of the transparent substrate 20 are included.
  • the display front plate 40A includes the touch panel sensor 110, whereby the touch panel function is provided to the display front plate 40A.
  • FIG. 37 is a diagram showing a display device 70 that includes a display unit 50 and a display front plate 40 ⁇ / b> A that is provided on the viewer side of the display unit 50 and has a touch panel sensor 110.
  • the touch panel function can be given to the display device 70 more easily, and the outside light on the viewer side of the display device 70 can be provided. Can be prevented from occurring.
  • the touch panel sensor 110 is in direct contact with the transparent substrate 20 in the display front panel 40A shown in FIG.
  • an air gap is generated between the transparent substrate 20 and the touch panel sensor 110, and it is conceivable that light is reflected on the display unit side of the transparent substrate 20 due to the air gap.
  • modified examples for preventing such reflection of light will be described.
  • FIG. 38 is a diagram illustrating an example in which the adhesive layer 100 is provided between the transparent substrate 20 and the touch panel sensor 110.
  • the adhesive layer 100 By providing such an adhesive layer 100, it is possible to prevent an air gap from being generated between the transparent substrate 20 and the touch panel sensor 110, whereby light is reflected on the display unit side of the transparent substrate 20. Can be prevented.
  • FIG. 39 is a diagram illustrating an example in which the additional buffer layer 65 and the additional antireflection film 35 are provided on the display unit side of the transparent substrate 20.
  • the additional buffer layer 65 it is possible to prevent light from being reflected on the display unit side of the transparent substrate 20 by providing the additional antireflection film 35 formed of the additional low refractive index layer 36. Further, by providing the additional buffer layer 65, it is possible to prevent the additional antireflection film 35 from being damaged.
  • FIG. 40 is a diagram illustrating an example in which the additional antireflection film 35 including the additional low refractive index layer 36A is provided on the display unit side of the transparent substrate 20.
  • the additional low refractive index layer 36A is an additional low refractive index layer with improved scratch resistance, as in the case of the sixth embodiment described above. By providing such an additional low refractive index layer 36A, it is possible to prevent light from being reflected on the display unit side of the transparent substrate 20, and to make the additional buffer layer 65 unnecessary.
  • the antireflection film 30 or the additional antireflection film 35 includes only the low refractive index layer 31 or the additional low refractive index layers 36 and 36A is shown.
  • the present invention is not limited to this, and the antireflection film 30 or the additional antireflection film 35 is the high refractive index layer 32 or the additional high refraction, as in the case of the modifications of the third and fourth embodiments.
  • the rate layer 37 may be further included. Thereby, the effect of preventing reflection of external light by the antireflection film 30 and the additional antireflection film 35 can be further enhanced.
  • the adhesive layer 100 may be provided on the viewer side of the antireflection film 30.
  • the protective layer 105 may be provided on the observer side of the adhesive layer 100 provided on the observer side of the antireflection film 30.
  • the display front plate 40A may further include an observer-side polarizing plate 154, a color filter 200, and the like.
  • an observer-side polarizing plate 154 may be provided between the transparent substrate 20 and the touch panel sensor 110.
  • FIG. A filter 200 may be provided.
  • the arrangement of the touch panel sensor 110 and the arrangement of the observer side polarizing plate 154 shown in FIGS. 41 and 42 may be interchanged.
  • FIGS. 43 to 48 The present embodiment shown in FIGS. 43 to 48 is only different in that the touch panel sensor is integrally formed with the display front plate, and the other configuration is the tenth embodiment shown in FIGS. 36 to 42.
  • the form is substantially the same.
  • the eleventh embodiment shown in FIG. 43 to FIG. 48 the same parts as those in the tenth embodiment shown in FIG. 36 to FIG.
  • FIG. 43 is a diagram showing a display front plate 40A formed integrally with the touch panel sensor.
  • the display front plate 40 ⁇ / b> A includes a transparent substrate 20, a buffer layer 60 provided on the observer side of the transparent substrate 20, and an antireflection film 30 provided on the observer side of the buffer layer 60.
  • a sensor unit 120 provided on the surface of the transparent substrate 20 on the display unit side.
  • the sensor part 120 is substantially the same as the sensor part 120 shown in the above-mentioned 7th Embodiment, detailed description is abbreviate
  • the touch panel sensor is formed integrally with the display front plate 40A
  • the touch panel sensor substrate and the display front plate transparent substrate are common as shown in FIG. It means that
  • the touch panel sensor is integrated with the display front plate 40A.
  • a touch panel function can be given to the display front plate 40A more easily.
  • the touch panel sensor substrate and the display front plate 40 can be made unnecessary as compared with the case where the touch panel sensor 110 and the display front plate 40 are configured separately. Therefore, when the display device 70 with a touch panel function is configured using the display front plate 40A, the thickness and weight of the display device 70 can be reduced by the amount of the substrate for the touch panel sensor.
  • the surface of the transparent substrate 20 on the display unit side is covered with the sensor unit 120. Therefore, no air gap is formed on the surface of the transparent substrate 20 on the display unit side. Therefore, it is possible to prevent light from being reflected on the display unit side of the transparent substrate 20 without providing the adhesive layer 100 or the like on the display unit side of the transparent substrate 20 as in the case of the tenth embodiment described above. Can do. That is, according to the present embodiment, not only a touch panel function can be given to the display front plate 40A, but also light reflection on the display unit side of the transparent substrate 20 can be prevented.
  • the adhesive layer 100 by preventing the adhesive layer 100 from being interposed between the sensor unit 120 and the transparent substrate 20, the sensitivity of the sensor unit 120 can be improved and the light transmittance can be improved. Moreover, the process of bonding the transparent substrate 20 and the touch panel sensor 110 via the adhesive layer 100 becomes unnecessary, thereby reducing the number of manufacturing steps and avoiding problems that may occur at the time of bonding. For example, it is possible to eliminate the concern that bubbles or the like are mixed at the time of bonding, thereby reducing the yield.
  • the display front plate 40A includes / includes / includes the touch panel sensor 110
  • the display front plate 40A includes the touch panel sensor 110 that can be independently traded, transported, etc.
  • the concept includes not only the case where the sensor unit 120 is included but also the case where the sensor unit 120 is formed on the transparent substrate 20 of the display front plate 40A.
  • the form of the display front plate 40A formed integrally with the touch panel sensor is not limited to the form shown in FIG. 43, and various other forms can be considered.
  • the adhesive layer 100 may be provided on the display unit side of the sensor unit 120.
  • a signal processing unit 125 may be attached to the sensor unit 120.
  • an observer-side polarizing plate 154 may be provided on the display unit side of the sensor unit 120.
  • a color filter 200 may be further provided on the display unit side of the observer side polarizing plate 154.
  • the sensor part 120 showed the example formed on the surface by the side of the display part of the transparent substrate 20, it is not restricted to this, The sensor part 120 is formed on the surface by the side of the observer of the transparent substrate 20 May be.
  • the antireflection film 30 is composed of only the low refractive index layer 31.
  • the antireflection film 30 may further include a high refractive index layer 32 as in the case of the modification of the third embodiment described above. Thereby, the effect of the antireflection film 30 preventing reflection of external light can be further enhanced.
  • the display front plate 40A may further include an additional buffer layer 65 and an additional antireflection film 35.
  • the additional buffer layer 65 is not provided. Also good.
  • the adhesive layer 100 may be provided on the viewer side of the antireflection film 30.
  • the protective layer 105 may be provided on the observer side of the adhesive layer 100 provided on the observer side of the antireflection film 30.
  • the display front plate 40A with a touch panel function further includes the observer-side polarizing plate 154 and the color filter 200 is shown.
  • the present invention is not limited to this, and the display front plate 40 that does not have a touch panel function may further include the observer-side polarizing plate 154 and the color filter 200.
  • both the buffer layer 60 and the sensor unit 120 may be provided on one side of the transparent substrate 20.
  • both the buffer layer 60 and the sensor unit 120 may be provided on the observer side of the transparent substrate 20, or both the buffer layer 60 and the sensor unit 120 are provided on the display unit 50 side of the transparent substrate 20. It may be.
  • the buffer layer 60 and the sensor unit 120 of the display front plate 40 shown in FIG. 51A will be described with reference to FIG. 51B.
  • 51B on one side of the transparent substrate 20, a sensor unit 120 including an x transparent conductive pattern 111 formed on the surface of one side of the transparent substrate 20, and a sensor unit 120 is disposed.
  • the buffer layer 60 is provided.
  • the buffer layer 60 is in partial contact with the surface on one side of the transparent substrate 20. That is, also in this modification, the buffer layer 60 is provided directly on the surface of the transparent substrate 20.
  • the design layer 10 formed in the non-display area on the viewer side of the display front plates 40 and 40A may have a function as various sensors.
  • the design layer 10 may have a function as an optical sensor.
  • the design layer 10 can be used as a touch panel sensor, a proximity sensor, or the like.
  • the proximity sensor is a sensor that can sense that an object is approaching without contacting the object.
  • an on / off switching function as a switch can be exhibited without a third person recognizing that there is a switch.
  • the proximity sensor detects that the ear has approached the mobile phone or the like. Accordingly, the touch panel display can be automatically switched on and off, and power consumption can be saved by such a mechanism.
  • the face is in contact with the touch panel sensor when the ear is approaching, it is possible to determine that the contact is not intended for operation using the touch panel sensor, thereby preventing malfunction. be able to.
  • the proximity sensor can check not only whether there is an object nearby but also the distance to the object. For this reason, for example, when a proximity sensor is used in a digital signage display, the power can be turned on only when a person approaches a predetermined distance. Furthermore, by combining with software that determines age, sex, etc., it is possible to provide optimal information.
  • the transparent substrate 20 may be a plastic substrate such as polycarbonate, polystyrene, or acrylic.
  • the transparent substrate 20 may be a plastic substrate such as polycarbonate, polystyrene, or acrylic.
  • various types of glass can be used.
  • alkali glass such as soda glass or borosilicate glass may be used, or non-alkali glass may be used.
  • the chemically strengthened glass with which the chemically strengthened layer was provided in the surface of glass may be used.
  • the chemical strengthening layer is a layer formed by replacing sodium in the glass with potassium.
  • the thickness of such a chemically strengthened layer is not particularly limited, and the thickness of the chemically strengthened layer is appropriately set according to required characteristics. For example, when it is necessary to ensure the cutting ability and productivity of the glass while imparting a certain degree of strength to the glass, the thickness of the chemical strengthening layer is set within a range of about 5 to 10 ⁇ m. Further, when it is required to impart higher strength to the glass, the thickness of the chemically strengthened layer may be set within a range of about 10 to 35 ⁇ m, or may be set to 35 ⁇ m or more.
  • the glass has a certain degree of cutability.
  • the thickness of the chemically strengthened layer is 35 ⁇ m or more, it is difficult to cut the glass even if a high-performance cutting means such as a diamond cutter is used. Therefore, when the thickness of the chemically strengthened layer is required to be 35 ⁇ m or more, preferably, the chemically strengthened layer is formed on the surface of the glass by performing ion exchange treatment on the glass after being cut into a desired shape.
  • the Examples of the glass having a chemically strengthened layer formed on the surface in this way include Corning's Gorilla Glass (Gorilla Glass), Asahi Glass Company's Dragon Trail, and the like.
  • the layer located on the outermost surface on the viewer side of the display front plate 40 for example, the low refractive index layer 31 or the protective layer 105 functions as an antifouling layer that prevents adhesion of dirt. May further be included.
  • the function as an antifouling layer is, for example, fingerprint resistance, which is an oil and fat component that adheres when touched by human hands, water repellency against rainwater, slipperiness against dirt wiping, and magic. Magic resistance against graffiti.
  • the low refractive index layer 31 or the protective layer 105 contains silicon element, carbon element, and fluorine element at a predetermined ratio. Can be mentioned.
  • the buffer layer 60 is formed by applying a coating solution containing the material of the buffer layer 60 on the transparent substrate 20 and a sheet-like or film-like buffer layer 60 are prepared. Then, an example in which this is formed on the transparent substrate 20 through an adhesive layer such as an adhesive or a tape is shown.
  • a method of forming the buffer layer 60 by applying a coating solution containing the material of the buffer layer 60 on the transparent substrate 20 is preferably used. The reason is as follows.
  • the buffer layer 60 When the buffer layer 60 is bonded to the transparent substrate 20 via the adhesive layer, first, a sheet or film as a base material is prepared, and then a coating solution containing the material of the buffer layer 60 is applied onto the sheet or film. Thus, the sheet-like or film-like buffer layer 60 is produced. In this case, in the manufacturing process of the display front plate, an operation of attaching the sheet-like or film-like buffer layer 60 to the transparent substrate 20 occurs. In this case, it is conceivable that foreign matters, bubbles, or the like are mixed when the sheet-like or film-like buffer layer 60 is applied to the transparent substrate 20, thereby reducing the yield.
  • the weight and thickness of the display front plate increase by the amount of the sheet or film that supports the buffer layer 60 and the adhesive layer for bonding the sheet-like or film-like buffer layer 60 and the transparent substrate 20 together.
  • the light transmittance of the display front plate may be reduced.
  • the sheet-like or film-like buffer layer 60 generally has undulations, it may be possible that the appearance of the display front plate becomes non-uniform due to the undulations.
  • coating the coating liquid containing the material of the buffer layer 60 on the transparent substrate 20 the process of sticking the sheet-like or film-like buffer layer 60 on the transparent substrate 20 Can be reduced.
  • the weight and thickness of the display front plate can be increased by the amount of the sheet or film and the adhesive layer. It is possible to prevent the light transmittance in the display front plate from being lowered by the amount of the sheet or film and the adhesive layer. That is, by providing the buffer layer 60 directly on the transparent substrate 20, the light transmittance of the display front plate can be increased as compared with the case where the sheet-like or film-like buffer layer 60 is used. Further, it is possible to prevent the appearance of the display front plate from becoming uneven due to the undulation of the sheet-like or film-like buffer layer 60.
  • the low refractive index layer 31 is formed by applying a coating solution containing the material of the low refractive index layer 31 onto the buffer layer 60, and the sheet-like or film-like low
  • a coating solution containing the material of the low refractive index layer 31 onto the buffer layer 60 is prepared and attached to the buffer layer 60 via an adhesive layer such as an adhesive or a tape.
  • the method of forming the low refractive index layer 31 by applying a coating solution containing the material of the low refractive index layer 31 onto the buffer layer 60 is preferable, as in the case of the buffer layer 60. Is used.
  • the sheet or film-shaped low refractive index layer 31 produced by applying a coating liquid containing the material of the low refractive index layer 31 to the sheet or film serving as the base material.
  • the process of sticking on the transparent substrate 20 can be reduced.
  • the number of manufacturing steps can be reduced, and the above-described problems that may occur at the time of bonding can be avoided.
  • the weight and thickness of the display front plate are increased by the amount of the sheet or film and the adhesive layer.
  • permeability of the light in a display front board falls only the part for a sheet
  • the support member that supports the buffer layer 60 is configured by the transparent substrate 20 has been described.
  • the example in which the buffer layer 60 is directly provided on the surface of the transparent substrate 20 has been described mainly.
  • the present invention is not limited to this, and the support member that supports the buffer layer 60 may further include a member or layer other than the transparent substrate 20, and the buffer layer 60 may be provided on the member or layer.
  • the support member 20 ⁇ / b> A including the transparent substrate 20 further includes an invisible layer 21 provided on the transparent substrate 20, and the buffer layer 60 and the sensor unit 120 are provided on the invisible layer 21. May be provided.
  • the x transparent conductive pattern 111 and the y transparent conductive pattern 112 are made of ITO or the like having a higher refractive index than that of the transparent substrate 20.
  • the transparent substrate 20, the x transparent conductive pattern 111, and the y transparent conductive pattern 112 are transparent.
  • the presence of the x transparent conductive pattern 111 and the y transparent conductive pattern 112 is likely to be visually recognized by an observer due to the difference in optical refractive index between the conductive pattern 112 and the conductive pattern 112.
  • Such an invisible layer 21 can be configured, for example, by using a material having a higher refractive index than materials such as ITO constituting the x transparent conductive pattern 111 and the y transparent conductive pattern 112.
  • the support member 20A including the transparent substrate 20 may further include a guard layer 22 provided on the transparent substrate 20, and the buffer layer 60 may be provided on the guard layer 22.
  • the guard layer 22 is a layer for appropriately releasing static electricity that may be generated when the display front plate 40 is manufactured, and is made of, for example, ITO having conductivity and transparency.
  • the buffer layer 60 is preferably directly on the surface of the support member 20A on the viewer side or the display unit side.
  • the buffer layer 60 is formed by applying a coating solution containing the material of the buffer layer 60 on the support member 20A.
  • the buffer layer 60 provided on the support member 20A can be obtained without interposing a sheet or film between the support member 20A and the buffer layer 60. It is possible to prevent the low refractive index layer 31 from being broken and the low refractive index layer 31 from being left depressed.
  • a transparent substrate 20 was prepared.
  • four types of materials (materials 1 to 4) having different compositions were prepared as materials for the buffer layer 60.
  • Each material is obtained by blending a predetermined monomer with a polymer such as urethane acrylate described above as the material of the buffer layer 60.
  • the composition of each material is suitably adjusted so that the ratio of the Vickers hardness or the amount of elastic deformation of the four types of buffer layers 60 obtained is different.
  • a Vickers indenter was pushed into each of the obtained first to fourth buffer layers 60 with a load of 5 mN, and the above-mentioned Vickers hardness and elastic deformation ratio were measured.
  • the Vickers hardness was 70, and the ratio of the amount of elastic deformation was 0.63.
  • the Vickers hardness was 58, and the elastic deformation ratio was 0.56.
  • the Vickers hardness was 64, and the ratio of the amount of elastic deformation was 0.58.
  • the Vickers hardness was 64 and the ratio of the amount of elastic deformation was 0.67.
  • a coating liquid containing a material for the low refractive index layer 31 was applied on each of the first to fourth buffer layers 60. Thereafter, vacuum drying was performed, and then the coating solution was exposed with an exposure amount of 600 mJ using a low-pressure mercury lamp. As a result, the antireflection film 30 composed of the low refractive index layer 31 was formed on each buffer layer 60.
  • the four types of antireflection films 30 were tested for scratch resistance. Specifically, steel wool (No. 0000) loaded with 100 g was swept on each antireflection film 30 (10 reciprocations, 100 mm stroke). Thereafter, whether or not scratch marks were visually recognized on each antireflection film 30 was visually confirmed. As a result, scratch marks were not visually recognized.
  • a transparent substrate 20 was prepared.
  • a coating liquid containing a material for the low refractive index layer 31 was applied on the transparent substrate 20. Thereafter, vacuum drying was performed, and then the coating solution was exposed with an exposure amount of 600 mJ using a low-pressure mercury lamp. As a result, the antireflection film 30 composed of the low refractive index layer 31 was formed on the transparent substrate 20.
  • the resulting antireflection film 30 was subjected to a scratch resistance test in the same manner as in the above-described example. As a result, scratch marks were visually recognized.
  • the buffer layer 60 is not provided between the antireflection film 30 and the transparent substrate 20, it is considered that the stress applied to the antireflection film 30 could not be relieved.
  • a transparent substrate 20 made of glass having an optical refractive index of 1.51 was prepared.
  • a material in which the absolute value of the difference from the optical refractive index of the transparent substrate 20 was 0.03 or less was prepared as a material for the buffer layer 60.
  • a material having an optical refractive index of 1.52 to 1.53 was prepared.
  • a coating liquid containing a material for the buffer layer 60 was prepared, and then the coating liquid was applied on the transparent substrate 20. As a result, the buffer layer 60 was provided directly on the transparent substrate 20. No.
  • the thickness of the buffer layer 60, the Vickers hardness when the Vickers indenter is pushed into the buffer layer 60 with a load of 5 mN, and the total deformation amount of the buffer layer 60 at that time The ratio of the amount of elastic deformation of the buffer layer 60 with respect to is shown in FIG.
  • the low refractive index layer 31 is a low refractive index layer including a binder resin portion 31a and a plurality of hollow fillers 31b dispersed in the binder resin portion 31a.
  • a refractive index layer 31 was employed.
  • the light refractive index of the low refractive index layer 31 as a whole including the binder resin portion 31a and the hollow filler 31b was in the range of 1.33 to 1.34. No.
  • the thickness of the low refractive index layer 31 in each of the display front plates 40 of 1 to 13 is shown in FIG.
  • a display front plate not including the buffer layer 60 was prepared.
  • the thickness of the buffer layer 60 is set to 0.5 ⁇ m or more, and the thickness of the low refractive index layer 31 is set to 120 nm or less, for example, 100 nm or less. As a result, the number of scratch marks formed can be suppressed to 30 or less.
  • No. Evaluation results of the display front plate 40 of Nos. 1 to 4 and 11 to 13 As can be seen from the comparison with the evaluation results of the display front plate 40 of 6, 8 to 10, the thickness of the low refractive index layer 31 is in the range of 90 to 120 nm, and the Vickers hardness of the buffer layer 60 is 50 to 100.
  • the number of scratch marks formed can be suppressed to 20 or less. Furthermore, no.
  • the Vickers hardness of the buffer layer 60 is in the range of 60 to 90, and the elastic deformation with respect to the total deformation amount in the buffer layer 60 By setting the ratio of the amount to 0.60 or more, no scratch marks could be formed.

Abstract

L'invention vise à proposer un panneau avant à des fins d'affichage, lequel panneau a une résistance à la rayure élevée. A cet effet, l'invention porte sur un panneau avant (40) à des fins d'affichage, lequel panneau comprend un substrat transparent (20), une couche tampon (60) qui est disposée directement sur le côté observateur ou sur le côté de partie d'affichage du substrat transparent (20) et un film anti-réfléchissant (30) qui est disposé sur la couche tampon (60). Le film anti-réfléchissant (30) a, formée sur la couche située le plus à l'extérieur de celui-ci, une couche à faible indice de réfraction (31). La couche à faible indice de réfraction (31) a un indice de réfraction de la lumière inférieur à celui du substrat transparent (20). La couche tampon (60) a un indice de réfraction de la lumière supérieur à celui de la couche à faible indice de réfraction (31), et la couche tampon (60) a une épaisseur supérieure à celle de la couche à faible indice de réfraction (31).
PCT/JP2011/079095 2010-12-16 2011-12-15 Panneau avant à des fins d'affichage, et dispositif d'affichage WO2012081679A1 (fr)

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JP2010-280355 2010-12-16
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JP5964273B2 (ja) 2013-05-27 2016-08-03 日東電工株式会社 タッチパネルセンサ
JP6337454B2 (ja) * 2013-12-12 2018-06-06 大日本印刷株式会社 表示装置用前面板およびその製造方法
JP2015169765A (ja) * 2014-03-06 2015-09-28 大日本印刷株式会社 表示装置用前面板およびその製造方法
JP6421503B2 (ja) * 2014-09-02 2018-11-14 富士通株式会社 電子機器
CN107765910B (zh) * 2016-08-17 2020-11-24 财团法人工业技术研究院 触控面板
JP2019012216A (ja) * 2017-06-30 2019-01-24 コネクテックジャパン株式会社 表示装置およびこれの製造方法
JP2021154664A (ja) * 2020-03-30 2021-10-07 日東電工株式会社 複層構造体

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