WO2021117323A1 - Panneau à cristaux liquides - Google Patents

Panneau à cristaux liquides Download PDF

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Publication number
WO2021117323A1
WO2021117323A1 PCT/JP2020/038059 JP2020038059W WO2021117323A1 WO 2021117323 A1 WO2021117323 A1 WO 2021117323A1 JP 2020038059 W JP2020038059 W JP 2020038059W WO 2021117323 A1 WO2021117323 A1 WO 2021117323A1
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Prior art keywords
liquid crystal
film
layer
polarizing film
crystal panel
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PCT/JP2020/038059
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English (en)
Japanese (ja)
Inventor
智之 木村
雄祐 外山
昌邦 藤田
悟士 山本
佳史 ▲高▼見
Original Assignee
日東電工株式会社
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Priority to KR1020227023636A priority Critical patent/KR20220115599A/ko
Priority to CN202080080315.5A priority patent/CN114761865A/zh
Publication of WO2021117323A1 publication Critical patent/WO2021117323A1/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
    • G02F1/133528—Polarisers
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/1044—Invariable transmission
    • B32B17/10458—Polarization selective transmission
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
    • B32B17/10467—Variable transmission
    • B32B17/10495—Variable transmission optoelectronic, i.e. optical valve
    • B32B17/10504—Liquid crystal layer
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133502—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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • 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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to a liquid crystal panel.
  • the liquid crystal display device includes, for example, a liquid crystal panel having a structure in which a polarizing film is arranged on the visual side of the liquid crystal cell, and a lighting system that irradiates the liquid crystal panel with light.
  • the liquid crystal display device displays an image by applying a voltage to the liquid crystal cell and adjusting the orientation of the liquid crystal molecules contained in the liquid crystal cell.
  • a liquid crystal display device static electricity is generated during its manufacture, for example, when a polarizing film is attached to a liquid crystal cell via an adhesive layer, or when it is used, for example, when a user touches the liquid crystal display device.
  • This static electricity may charge the liquid crystal display device.
  • the orientation of the liquid crystal molecules contained in the liquid crystal cell is disturbed, which may cause display failure.
  • an ITO (indium tin oxide) layer is arranged on the surface of a liquid crystal cell on the polarizing film side, for example, in order to prevent display defects due to charging of the liquid crystal display device.
  • Patent Documents 1 and 2 disclose a liquid crystal panel in which the ITO layer is not arranged on the surface of the liquid crystal cell on the polarizing film side and the polarizing film with an adhesive layer is in direct contact with the liquid crystal cell.
  • the liquid crystal display device in which the ITO layer is not arranged on the surface of the liquid crystal cell on the polarizing film side has been used in an environment in which static electricity is particularly likely to occur, for example, in an environment in which other electronic devices exist in the surroundings such as inside a vehicle. In some cases, it is difficult to sufficiently prevent display defects due to charging. Further, when the liquid crystal display device is used as an in-vehicle display, for example, good visibility is required from the viewpoint of safety.
  • an object of the present invention is to provide a liquid crystal panel capable of preventing display defects due to charging of the liquid crystal display device and improving the visibility of the liquid crystal display device.
  • the present invention An antireflection film, a polarizing film, and a pressure-sensitive adhesive layer are provided in this order in the stacking direction, and a polarizing film with an antireflection film further having a conductive layer. LCD cell and With No conductive layer is provided between the polarizing film with an antireflection film and the liquid crystal cell.
  • the surface resistivity of the conductive layer polarizing film with antireflection film has is at 1.0 ⁇ 10 6 ⁇ / ⁇ or less
  • the light from the CIE standard light source D65 is on the opposite side of the pressure-sensitive adhesive layer in a state where the pressure-sensitive adhesive layer is laminated with the non-alkali glass so as to be in direct contact with the non-alkali glass.
  • a liquid crystal panel that produces reflected light having a visual reflectance Y of 1.1% or less when incident from a surface.
  • the present invention it is possible to provide a liquid crystal panel capable of preventing display defects due to charging of the liquid crystal display device and improving the visibility of the liquid crystal display device.
  • the liquid crystal panel 100 of the present embodiment includes a polarizing film 15 with an antireflection film and a liquid crystal cell 25.
  • a conductive layer for example, an ITO layer is not provided between the polarizing film 15 with an antireflection film and the liquid crystal cell 25, and the polarizing film 15 with an antireflection film is in direct or indirect contact with the liquid crystal cell 25.
  • a layer other than the conductive layer may be arranged between the polarizing film 15 with an antireflection film and the liquid crystal cell 25 as long as the effects of the present invention are not impaired.
  • the polarizing film 15 with an antireflection film has an antireflection film 10, a polarizing film 20, and an adhesive layer 30 in this order in the stacking direction, and further has a conductive layer 40.
  • the conductive layer 40 is arranged between, for example, the polarizing film 20 and the pressure-sensitive adhesive layer 30, and is in contact with each of the polarizing film 20 and the pressure-sensitive adhesive layer 30.
  • the conductive layer 40 may be arranged other than between the polarizing film 20 and the pressure-sensitive adhesive layer 30, and may be arranged, for example, between the antireflection film 10 and the polarizing film 20.
  • the surface resistivity of the conductive layer 40 is 1.0 ⁇ 10 6 ⁇ / ⁇ or less.
  • the conductive layer 40 having such a low surface resistivity can prevent display defects due to charging of the liquid crystal display device including the liquid crystal panel 100 even in an environment where static electricity is likely to occur.
  • the surface resistivity of the conductive layer 40 can be specified by the following method. First, a laminate in which the surface of the conductive layer 40 is exposed to the outside is prepared. Examples of such a laminate include a laminate L composed of a polarizing film 20 and a conductive layer 40. Next, the surface resistivity of the surface of the conductive layer 40 in the prepared laminate is measured.
  • the surface resistivity can be measured according to the method specified in JIS K7194: 1994 or JIS K6911: 1995.
  • the surface resistivity of the conductive layer 40 is Loresta-GP MCP-T600 (manufactured by Mitsubishi Chemical Analytech Co., Ltd.). Therefore, the measurement can be performed in accordance with the method specified in JIS K7194: 1994.
  • the surface resistivity of the conductive layer 40 is 1.0 ⁇ 10 5 ⁇ / ⁇ or more
  • the surface resistivity of the conductive layer 40 is JIS using High Restor UP MCP-HT450 (manufactured by Mitsubishi Chemical Analytech Co., Ltd.). It can be measured according to the method specified in K6911: 1995.
  • the measured value obtained by the above measurement can be regarded as the surface resistivity of the conductive layer 40 in the polarizing film 15 with an antireflection film.
  • the surface resistivity of the conductive layer 40 is preferably 5.0 ⁇ 10 5 ⁇ / ⁇ or less, more preferably 1.0 ⁇ 10 5 ⁇ / ⁇ or less, and further preferably 1.0 ⁇ 10 4 ⁇ . It is / ⁇ or less, and particularly preferably 1.0 ⁇ 10 3 ⁇ / ⁇ or less.
  • the lower limit of the surface resistivity of the conductive layer 40 is not particularly limited, and is, for example, 1.0 ⁇ 10 2 ⁇ / ⁇ .
  • the surface resistance of the conductive layer 40 is 5.0 ⁇ from the viewpoint of sufficiently ensuring the sensitivity of the touch sensor or the touch panel provided in the liquid crystal display device. It may be larger than 10 2 ⁇ / ⁇ .
  • the polarizing film 15 with an antireflection film has the pressure-sensitive adhesive layer 30 laminated on the non-alkali glass so as to be in direct contact with the non-alkali glass, and the light from the CIE standard light source D65 is on the surface opposite to the pressure-sensitive adhesive layer 30.
  • reflected light having a visual reflectance Y of 1.1% or less is generated.
  • the visual reflectance Y means the Y value of the tristimulus values (X, Y and Z) in the XYZ color system (CIE 1931).
  • the tristimulus values are specified in detail in JIS Z8701: 1999.
  • the above-mentioned visual reflectance Y can be specified by the following method.
  • the polarizing film 15 with an antireflection film is attached to non-alkali glass by the pressure-sensitive adhesive layer 30.
  • the non-alkali glass is a glass that does not substantially contain an alkaline component (alkali metal oxide).
  • the weight ratio of the alkaline component in the glass is, for example, 1000 ppm or less, and further 500 ppm or less.
  • the non-alkali glass is, for example, plate-shaped and has a thickness of 0.5 mm or more.
  • the black film is attached to the surface of the non-alkali glass on the opposite side of the surface to which the polarizing film 15 with the antireflection film is attached.
  • the light from the CIE standard light source D65 is incident on the surface of the polarizing film 15 with the antireflection film on the antireflection film 10 side at an incident angle of 5 °.
  • the spectral reflectance in the wavelength range of 360 nm to 740 nm can be specified, and the visual reflectance Y in the XYZ color system (CIE 1931) can be specified from the spectral reflectance.
  • the visual reflectance Y is preferably 1.0% or less, more preferably 0.9% or less, further preferably 0.8% or less, and particularly preferably 0.7% or less.
  • the lower limit of the visual reflectance Y is not particularly limited, and is, for example, 0.1%.
  • the a * value and the b * value of the reflected light in the L * a * b * color system are not particularly limited, but it is preferable that the following relational expressions (1) and (2) are satisfied. -10 ⁇ a * ⁇ 10 (1) -18 ⁇ b * ⁇ 5 (2)
  • a * and b * values are the following equations (i) and (i) defined by JIS Z8781-4: 2013 using the tristimulus values (X, Y and Z) of the reflected light in the XYZ color system. It can be specified by ii).
  • the above a * value is preferably -6 or more and 6 or less, and more preferably -3 or more and 3 or less.
  • the above b * value is preferably -15 or more and 3 or less, more preferably -10 or more and 2 or less, further preferably -6 or more and 2 or less, and particularly preferably -5 or more and 2 or less.
  • the a * value and the b * value may satisfy the following relational expressions (3) and (4).
  • a * value and the b * value may satisfy the following relational expressions (5) and (6).
  • the L * value of the reflected light is, for example, 12 or less, preferably 10 or less, more preferably 8 or less, and further preferably 7 or less.
  • the lower limit of the L * value is not particularly limited, and is, for example, 3.
  • the L * value can be specified by the following formula (iii) defined by JIS Z8781-4: 2013 using the above tristimulus values.
  • the lower limit of the color difference ⁇ E is not particularly limited, and is, for example, 3.
  • the color difference ⁇ E can be calculated based on the following equation (iv) using the L * value, a * value, and b * value of the reflected light.
  • ⁇ E * ⁇ (L * ) 2 + (a * ) 2 + (b * ) 2 ⁇ 1/2 (iv)
  • the antireflection film 10 is formed by laminating a first high refractive index layer 1, a first low refractive index layer 2, a second high refractive index layer 3, and a second low refractive index layer 4. Have in this order in the direction.
  • the first high refractive index layer 1 is in contact with, for example, the polarizing film 20.
  • the second low refractive index layer 4 is located, for example, on the most visible side of these layers.
  • the high refractive index layers 1 and 3 are layers having a higher refractive index than the low refractive index layers 2 and 4, and the refractive index thereof is, for example, in the range of 1.6 to 3.2.
  • the refractive index of the first high refractive index layer 1 may be the same as or different from that of the second high refractive index layer 3.
  • the high refractive index layers 1 and 3 include, for example, a binder resin and inorganic fine particles dispersed in the binder resin.
  • the binder resin is typically a cured product of an ionizing wire curable resin, and more specifically, a cured product of an ultraviolet curable resin.
  • the ultraviolet curable resin include a resin containing a polymer or oligomer having a substituent capable of radical polymerization, for example, a (meth) acrylate resin.
  • the (meth) acrylate resin as the ultraviolet curable resin includes, for example, polymers or oligomers such as epoxy (meth) acrylate, polyester (meth) acrylate, acrylic (meth) acrylate, and ether (meth) acrylate.
  • the (meth) acrylate resin may further contain a radically polymerizable monomer (precursor) in addition to the above-mentioned polymer or oligomer.
  • the molecular weight of this monomer is, for example, 200 to 700.
  • the ionizing wire curable resin may contain an initiator, if necessary. Examples of the initiator include a UV radical generator (Irgacure 907, 127, 192, etc.
  • the above binder resin may contain other resins in addition to the cured product of the ionizing wire curable resin.
  • the other resin may be a thermosetting resin or a thermoplastic resin.
  • examples of other resins include aliphatic resins (for example, polyolefins) and urethane resins.
  • the refractive index of the binder resin is, for example, 1.40 to 1.60.
  • the blending amount of the binder resin is, for example, 10 parts by weight to 80 parts by weight, preferably 20 parts by weight to 70 parts by weight, based on 100 parts by weight of the high refractive index layer to be formed.
  • the material of the inorganic fine particles is, for example, a metal oxide.
  • the metal oxide include zirconium oxide (zirconia) (refractive index: 2.19), aluminum oxide (refractive index: 1.56 to 2.62), and titanium oxide (refractive index: 2.49 to 2. 74), silicon oxide (refractive index: 1.25 to 1.46) can be mentioned.
  • These metal oxides not only absorb less light, but also have a higher refractive index than organic materials such as ionizing wire curable resins and thermoplastic resins, so that the refractive indexes of the high refractive index layers 1 and 3 are refracted. Suitable for adjusting the rate.
  • the inorganic fine particles preferably contain zirconium oxide or titanium oxide.
  • the refractive index of the inorganic fine particles is, for example, 1.60 or more, preferably 1.70 to 2.80, and more preferably 2.00 to 2.80.
  • Inorganic fine particles having a refractive index of 1.60 or more are suitable for adjusting the refractive index of the high refractive index layers 1 and 3.
  • the average particle size of the inorganic fine particles is, for example, 1 nm to 100 nm, preferably 10 nm to 80 nm, and more preferably 20 nm to 70 nm.
  • the average particle size of the inorganic fine particles means a particle size (d50) corresponding to a cumulative volume of 50% in a particle size distribution measured by, for example, a laser diffraction type particle size meter.
  • the inorganic fine particles do not have to be surface-modified, but are preferably surface-modified.
  • the surface-modified inorganic fine particles tend to disperse well in the binder resin.
  • the surface modification is performed, for example, by applying a surface modifier to the surface of the inorganic fine particles to form a surface modifier layer.
  • the surface modifier include coupling agents such as silane-based coupling agents and titanate-based coupling agents; and surfactants such as fatty acid-based surfactants.
  • the blending amount of the inorganic fine particles is, for example, 10 parts by weight to 90 parts by weight, more preferably 20 parts by weight to 80 parts by weight, based on 100 parts by weight of the high refractive index layer to be formed.
  • the antireflection film has sufficient mechanical properties and tends to be able to sufficiently reduce the visual reflectance Y of the reflected light.
  • the refractive index of the high refractive index layers 1 and 3 containing the binder resin and the inorganic fine particles is, for example, 1.6 to 2.6, preferably 1.7 to 2.2.
  • the high refractive index layers 1 and 3 contain a metal oxide or metal nitride, preferably substantially composed of a metal oxide or metal nitride.
  • the metal oxide include titanium oxide (TiO 2 ), indium / tin oxide (ITO), niobium oxide (Nb 2 O 5 ), yttrium oxide (Y 2 O 3 ), and indium oxide (In 2 O 3).
  • the metal nitride include silicon nitride (Si 3 N 4 ).
  • the high refractive index layers 1 and 3 preferably contain niobium oxide (Nb 2 O 5 ) or titanium oxide (TiO 2 ).
  • the refractive index of the high refractive index layer composed of a metal oxide or a metal nitride is, for example, 2.00 to 2.60, preferably 2.10 to 2.45.
  • the material of the first high refractive index layer 1 may be the same as or different from that of the second high refractive index layer 3.
  • the physical film thickness of the first high refractive index layer 1 is, for example, 9 nm to 15 nm, preferably 11 nm to 13 nm.
  • the optical film thickness of the first high refractive index layer 1 is, for example, 20 nm to 35 nm, preferably 25 nm to 30 nm.
  • the optical film thickness is a value represented by the product of the refractive index of light having a wavelength of 550 nm and the physical film thickness.
  • the physical film thickness of the second high refractive index layer 3 is, for example, 98 nm to 124 nm, preferably 111 nm to 120 nm.
  • the optical film thickness of the second high refractive index layer 3 is, for example, 230 nm to 290 nm, preferably 260 nm to 280 nm.
  • the low refractive index layers 2 and 4 are layers having a lower refractive index than the high refractive index layers 1 and 3, and the refractive index thereof is, for example, 1.35 to 1.55, preferably 1.40 to 1. It is .50.
  • the refractive index of the first low refractive index layer 2 may be the same as or different from that of the second low refractive index layer 4.
  • Examples of the materials of the low refractive index layers 2 and 4 include metal oxides and metal fluorides.
  • Specific examples of the metal oxide include silicon oxide (SiO 2 ).
  • Specific examples of the metal fluoride include magnesium fluoride and silicon fluoride acid.
  • magnesium fluoride and silicon fluoride acid are preferable from the viewpoint of refractive index
  • silicon oxide is preferable from the viewpoint of ease of production, mechanical strength, moisture resistance, etc., and various properties are integrated. Silicon oxide is preferable in consideration of the above.
  • the material of the first low refractive index layer 2 may be the same as or different from that of the second low refractive index layer 4.
  • the materials of the low refractive index layers 2 and 4 may be a cured product of a curable fluorine-containing resin.
  • the curable fluorine-containing resin has, for example, a constituent unit derived from a fluorine-containing monomer and a constituent unit derived from a crosslinkable monomer.
  • Specific examples of the fluorine-containing monomer include fluoroolefins (fluoroethylene, vinylidene fluoride, tetrafluoroethylene, hexafluoroethylene, hexafluoropropylene, perfluoro-2,2-dimethyl-1,3-dioxol, etc.).
  • (Meta) acrylic acid ester derivatives having partially or completely fluorinated alkyl groups (Viscoat 6FM (manufactured by Osaka Organic Chemistry Co., Ltd.), M-2020 (manufactured by Daikin Co., Ltd.), etc.), completely or partially Fluorinated vinyl ethers and the like can be mentioned.
  • the crosslinkable monomer include a (meth) acrylate monomer having a crosslinkable functional group in the molecule such as glycidyl methacrylate; a (meth) acrylate monomer having a functional group such as a carboxyl group, a hydroxyl group, an amino group and a sulfonic acid group.
  • the fluorine-containing resin may have a structural unit derived from a monomer other than the above-mentioned compounds (for example, an olefin-based monomer, a (meth) acrylate-based monomer, a styrene-based monomer).
  • the physical film thickness of the first low refractive index layer 2 is, for example, 26 nm to 34 nm, preferably 27 nm to 31 nm.
  • the optical film thickness of the first low refractive index layer 2 is, for example, 38 nm to 50 nm, preferably 40 nm to 45 nm.
  • the physical film thickness of the second low refractive index layer 4 is, for example, 68 nm to 88 nm, preferably 72 nm to 79 nm.
  • the optical film thickness of the second low refractive index layer 4 is, for example, 100 nm to 128 nm, preferably 105 nm to 115 nm.
  • the method for producing the high refractive index layer and the low refractive index layer is not particularly limited.
  • these layers contain a resin, they can be formed by a so-called wet process (curing after applying the resin composition).
  • these layers can be formed by a so-called dry process.
  • Specific examples of the dry process include PVD (Physical Vapor Deposition) method and CVD (Chemical Vapor Deposition) method.
  • the PVD method include a vacuum deposition method, a reactive vapor deposition method, an ion beam assist method, a sputtering method, and an ion plating method.
  • the CVD method include a plasma CVD method. From the viewpoint of reducing the variation in the hue of the reflected light, the sputtering method is preferable as the dry process.
  • the antireflection film 10 of FIG. 2 may further have members other than the high refractive index layer and the low refractive index layer.
  • FIG. 3 shows another example of the antireflection film.
  • the antireflection film 11 of FIG. 3 further has a base material 5 and an adhesive layer 6.
  • the base material 5 is arranged between the first high refractive index layer 1 and the polarizing film 20, for example, and is in contact with the first high refractive index layer 1.
  • the pressure-sensitive adhesive layer 6 is arranged between, for example, the base material 5 and the polarizing film 20, and is in contact with each of the base material 5 and the polarizing film 20.
  • the base material 5 contains, for example, a transparent resin film.
  • a transparent resin film examples include cellulose-based resins (triacetyl cellulose, diacetyl cellulose, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose, nitro cellulose, etc.) and polyamide-based resins (nylon-6, nylon-66).
  • Polyethylene resin Polycarbonate resin, Polyester resin (polyethylene terephthalate, polyethylene naphthalate, poly-1,4-cyclohexanedimethylene terephthalate, polyethylene-1,2-diphenoxyetane-4,4'-dicarboxy Rate, polybutylene terephthalate, etc.), polyolefin resin (polyethylene, polypropylene, polymethylpentene, etc.), polysulfone resin, polyethersulfone resin, polyarylate resin, polyetherimide resin, polymethylmethacrylate resin, poly Examples thereof include ether ketone resins, polystyrene resins, polyvinyl chloride resins, polyvinyl alcohol resins, ethylene vinyl alcohol resins, (meth) acrylic resins, and (meth) acrylonitrile resins.
  • the base material 5 may be a single layer of a resin film, a laminate of a plurality of resin films, or a laminate of a resin film and a hard coat layer described later.
  • the base material 5 may contain additives. Specific examples of the additive include an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, a colorant, an antioxidant, a flame retardant and the like.
  • the substrate 5 is a triacetyl cellulose (TAC) film.
  • TAC triacetyl cellulose
  • the triacetyl cellulose film can also function as a protective film for the polarizer. Therefore, by using the antireflection film 11 having the base material 5 made of the triacetyl cellulose film, the transparent protective film that the polarizing film 20 has on the visual recognition side may be omitted.
  • the substrate 5 comprises a hard coat layer.
  • the base material 5 may be composed of a hard coat layer, or may be a laminate of a resin film and a hard coat layer.
  • the hard coat layer is, for example, a cured layer of an ionizing wire curable resin.
  • the ionized wire include ultraviolet rays, visible light, infrared rays, and electron beams, and ultraviolet rays are preferable. That is, the ionizing wire curable resin is preferably an ultraviolet curable resin.
  • the ultraviolet curable resin include (meth) acrylic resin, silicone resin, polyester resin, urethane resin, amide resin, epoxy resin and the like.
  • Examples of the (meth) acrylic resin include a cured product (polymer) in which a polyfunctional monomer containing a (meth) acryloyloxy group is cured by ultraviolet rays.
  • a polyfunctional monomer for example, one kind or a combination of two or more kinds is used.
  • the polyfunctional monomer is used, for example, by mixing with a photopolymerization initiator.
  • Inorganic fine particles or organic fine particles may be dispersed in the hard coat layer.
  • the average particle size (d50) of the fine particles is, for example, 0.01 ⁇ m to 3 ⁇ m.
  • silicon oxide (SiO 2 ) is preferable from the viewpoint of refractive index, stability, heat resistance and the like.
  • the hard coat layer may contain additives. Specific examples of the additive include a leveling agent, a filler, a dispersant, a plasticizer, an ultraviolet absorber, a surfactant, an antioxidant, and a thixotropy agent.
  • the surface of the hard coat layer may have an uneven shape.
  • the hard coat layer having an uneven shape on the surface has a light diffusing function (anti-glare).
  • the physical film thickness of the base material 5 is not particularly limited.
  • the physical film thickness of the base material 5 is, for example, in the range of 10 ⁇ m to 200 ⁇ m.
  • the physical film thickness of the hard coat layer is, for example, in the range of 1 ⁇ m to 50 ⁇ m.
  • the refractive index of the base material 5 (when the base material 5 has a laminated structure, the refractive index of the layer on the first high refractive index layer 1 side) is, for example, 1.3 to 1.8, preferably 1. It is .4 to 1.7.
  • the pressure-sensitive adhesive layer 6 is a layer containing a pressure-sensitive adhesive.
  • the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 6 include a resin having adhesiveness. Examples of such a resin include an acrylic resin, an acrylic urethane resin, a urethane resin, and a silicone resin.
  • the pressure-sensitive adhesive layer 6 preferably contains an acrylic pressure-sensitive adhesive composed of an acrylic resin.
  • the pressure-sensitive adhesive layer 6 may further contain additives, if necessary.
  • Additives include, for example, cross-linking agents, tackifiers, plasticizers, pigments, dyes, fillers, anti-aging agents, conductive materials, UV absorbers, light stabilizers, release modifiers, softeners, surfactants, etc. Examples include flame retardants and antioxidants.
  • cross-linking agent examples include isocyanate-based cross-linking agent, epoxy-based cross-linking agent, peroxide-based cross-linking agent, melamine-based cross-linking agent, urea-based cross-linking agent, metal alkoxide-based cross-linking agent, metal chelate-based cross-linking agent, metal salt-based cross-linking agent, Examples thereof include a carbodiimide-based cross-linking agent, an oxazoline-based cross-linking agent, an aziridine-based cross-linking agent, and an amine-based cross-linking agent.
  • the physical film thickness of the pressure-sensitive adhesive layer 6 is, for example, 5 ⁇ m to 100 ⁇ m, preferably 10 ⁇ m to 50 ⁇ m.
  • the antireflection film 11 may further have members other than the base material 5 and the pressure-sensitive adhesive layer 6.
  • the antireflection film 11 may further have, for example, an anti-glare layer arranged between the base material 5 and the first high refractive index layer 1.
  • the antireflection film 11 is arranged between specific members (for example, between the base material 5 and the first high refractive index layer 1 or between the antiglare layer and the first high refractive index layer 1). It may further have an adhesion layer.
  • the adhesion layer is a layer for improving the adhesion between members, and includes, for example, silicon and SiO x (x ⁇ 2).
  • the physical film thickness of the adhesion layer is, for example, 1 nm to 10 nm, preferably 2 nm to 5 nm.
  • the refractive index of the adhesive layer is, for example, 1 to 2.5.
  • the antireflection films 10 and 11 may be arranged on the visual side of the second low refractive index layer 4 and may further have an antifouling layer in contact with the second low refractive index layer 4.
  • the antifouling layer is a layer having an antifouling effect, and includes, for example, at least one selected from a fluorine-based resin and a silicone-based resin.
  • the physical film thickness of the antifouling layer is, for example, 5 nm to 13 nm, preferably 5 nm to 10 nm.
  • the refractive index of the antifouling layer is, for example, 1 to 2.
  • the reflected light generated when light is incident on the antireflection films 10 and 11 from the CIE standard light source D65 has a small absolute value of a 1 * value and b 1 * value in the L * a * b * color system. Is preferable.
  • the a 1 * value is, for example, -6 or more and 6 or less, and more preferably -3 or more and 3 or less.
  • the b 1 * value is, for example, -15 or more and 3 or less, preferably -10 or more and 2 or less, and more preferably -5 or more and 2 or less.
  • the a 1 * value and the b 1 * value can be specified by the following methods.
  • the first high refractive index layer 1, the first low refractive index layer 2, the second high refractive index layer 3, and the second low refractive index layer 4 of the antireflection film 10 are laminated on the black film in this order.
  • the antireflection film 11 is attached to the black film by the pressure-sensitive adhesive layer 6 of the antireflection film 11.
  • the light from the CIE standard light source D65 is incident on the surface of the antireflection film 10 or 11 on the side of the second low refractive index layer at an incident angle of 5 °.
  • the spectral reflectance in the wavelength range of 360 nm to 740 nm is specified, and the tristimulus values in the XYZ color system are specified from the spectral reflectance.
  • the a 1 * value and the b 1 * value are specified by the above equations (i) and (ii).
  • the visual reflectance Y 1 of the reflected light is, for example, 0.3% or less, preferably 0.2% or less.
  • the polarizing film 20 is a laminate containing a polarizing element and a transparent protective film.
  • the transparent protective film is arranged, for example, in contact with the main surface (the surface having the largest area) of the layered polarizer.
  • the polarizer may be arranged between the two transparent protective films.
  • the polarizer is not particularly limited, and is, for example, a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, an ethylene-vinyl acetate copolymer system partially saponified film, and iodine and bicolor.
  • a uniaxially stretched film by adsorbing a bicolor substance such as a dye; a polyene-based oriented film such as a dehydrated product of polyvinyl alcohol and a dehydrogenated product of polyvinyl chloride can be mentioned.
  • the polarizer is preferably made of a polyvinyl alcohol-based film and a dichroic substance such as iodine.
  • the thickness of the polarizer is not particularly limited, and is, for example, 80 ⁇ m or less.
  • the thickness of the polarizer may be 10 ⁇ m or less, preferably 1 to 7 ⁇ m.
  • Such a thin polarizing element has less uneven thickness and is excellent in visibility.
  • the thin polarizer is suppressed in dimensional change and has excellent durability. According to the thin polarizing element, the polarizing film 20 can be made thinner.
  • thermoplastic resin having excellent transparency, mechanical strength, thermal stability, moisture blocking property, isotropic property, etc.
  • thermoplastic resins include cellulose resins such as triacetyl cellulose, polyester resins, polyether sulfone resins, polysulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) acrylic resins, and cyclic resins.
  • examples thereof include polyolefin resins (norbornene-based resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures thereof.
  • the material of the transparent protective film may be a thermosetting resin such as (meth) acrylic, urethane, acrylic urethane, epoxy, or silicone, or an ultraviolet curable resin.
  • a transparent protective film made of a thermoplastic resin is attached to one main surface of the polarizer via an adhesive, and a thermosetting resin or ultraviolet rays are attached to the other main surface of the polarizer.
  • a transparent protective film made of a curable resin may be attached.
  • the transparent protective film may contain one or more kinds of arbitrary additives.
  • the transparent protective film may have optical characteristics such as antiglare characteristics and antireflection characteristics.
  • the transparent protective film may be a film that functions as a retardation film.
  • the retardation film means a film having birefringence in the in-plane direction or the thickness direction.
  • Examples of the film that functions as a retardation film include a stretched polymer film and a film in which a liquid crystal material is oriented and immobilized.
  • the adhesive for bonding the polarizer and the transparent protective film is not particularly limited as long as it is optically transparent, and for example, an adhesive such as an aqueous adhesive, a solvent adhesive, a hot melt adhesive, a radical curing type, or a cationic curing type. , Preferably water-based adhesives and radical curable adhesives.
  • the thickness of the polarizing film 20 is, for example, 10 ⁇ m to 500 ⁇ m.
  • the total light transmittance of the polarizing film 20 is not particularly limited, and is, for example, 30% to 50%.
  • total light transmittance means the transmittance of light in the wavelength range of 380 nm to 700 nm.
  • the total light transmittance can be measured in accordance with the provisions of JIS K7361-1: 1997.
  • a CIE standard light source D65 is used to measure the total light transmittance.
  • the a value of the transmitted light in the Hunter Lab color system when the light from the CIE standard light source D65 is incident on the polarizing film 20 is preferably -6.0 to 0, preferably -3.0 to -0.5. More preferably, -1.8 to -1.2 is particularly preferable.
  • the b value of the transmitted light in the Hunter Lab color system is preferably 1.0 to 10, more preferably 1.5 to 5.0, and particularly preferably 2.2 to 4.0.
  • the a value and the b value in the hunter Lab color system of transmitted light can be specified by the following method. First, the transmittance of light from the CIE standard light source D65 in the polarizing film 20 is measured using the integrating sphere of the spectrophotometer.
  • the obtained transmittance is corrected for luminosity factor (780 to 380 nm: every 5 nm) by the 2 degree visual field XYZ system defined in JIS Z8701: 1999, so that the a value and b in the hunter Lab color system of transmitted light are performed.
  • the value can be specified.
  • the conductive layer 40 is a layer containing a conductive material.
  • the conductive material may be a material other than ITO, and includes, for example, a conductive polymer, a composite of a conductive polymer and a dopant, an ionic surfactant, conductive fine particles, and an ionic compound.
  • the conductive layer 40 preferably contains a conductive polymer from the viewpoints of transparency, total light transmittance, appearance, antistatic effect, and stability of the antistatic effect in a high temperature or high humidity environment.
  • the conductive layer 40 contains a conductive polymer as a conductive material
  • haze is less likely to occur even if the thickness of the conductive layer 40 is adjusted to be relatively large, as compared with the case where the conductive layer 40 contains conductive fine particles. Therefore, even when the conductive layer 40 is arranged between the liquid crystal cell 25 and the polarizer, the conductive layer 40 containing the conductive polymer is unlikely to cause depolarization, and the image displayed by the liquid crystal display device. It is difficult to reduce the contrast of.
  • the conductive layer 40 contains a conductive polymer as a conductive material
  • the refractive index of the conductive layer 40 tends to be lower than that when the conductive layer 40 contains conductive fine particles. Therefore, the conductive layer 40 containing the conductive polymer is suitable for further reducing the light reflectance of the liquid crystal panel 100.
  • the conductive polymer examples include polythiophene, polyaniline, polypyrrole, polyquinoxaline, polyacetylene, polyphenylene vinylene, polynaphthalene, and derivatives thereof.
  • the conductive material may contain one or more of these conductive polymers.
  • polythiophene, polyaniline and derivatives thereof are preferable, and polythiophene derivatives are particularly preferable.
  • Polythiophene, polyaniline and their derivatives function, for example, as water-soluble or water-dispersible conductive polymers.
  • the conductive layer 40 can be prepared by using an aqueous solution or an aqueous dispersion of the conductive polymer. In this case, since it is not necessary to use a non-aqueous organic solvent for producing the conductive layer 40, deterioration of the polarizing film 20 or the like due to the organic solvent can be suppressed.
  • the conductive polymer may have a hydrophilic functional group.
  • the hydrophilic functional group include a sulfon group, an amino group, an amide group, an imino group, a hydroxyl group, a mercapto group, a hydradino group, a carboxyl group, a sulfate ester group, a phosphate ester group and salts thereof (for example, quaternary ammonium).
  • Base When the conductive polymer has a hydrophilic functional group, the conductive polymer tends to be easily dissolved in water, or the finely divided conductive polymer tends to be easily dispersed in water.
  • the conductive polymer is preferably poly (3,4-disubstituted thiophene).
  • the poly (3,4-disubstituted thiophene) include poly (3,4-alkylenedioxythiophene) and poly (3,4-dialkoxythiophene), and poly (3,4-alkylenedi) is preferable.
  • Poly (3,4-alkylenedioxythiophene) has, for example, a structural unit represented by the following formula (I).
  • R 1 is, for example, an alkylene group having 1 to 4 carbon atoms.
  • the alkylene group may be linear or branched.
  • Examples of the alkylene group include a methylene group, a 1,2-ethylene group, a 1,3-propylene group, a 1,4-butylene group, a 1-methyl-1,2-ethylene group and a 1-ethyl-1,2- Examples thereof include an ethylene group, a 1-methyl-1,3-propylene group and a 2-methyl-1,3-propylene group, preferably a methylene group, a 1,2-ethylene group, a 1,3-propylene group, and more. It is preferably a 1,2-ethylene group.
  • the conductive polymer is preferably poly (3,4-ethylenedioxythiophene) (PEDOT).
  • the dopant examples include polyanions.
  • the conductive polymer is polythiophene (or a derivative thereof)
  • the polyanion forms an ion pair with polythiophene (or a derivative thereof), and the polythiophene (or a derivative thereof) can be stably dispersed in water.
  • the polyanion is not particularly limited, and examples thereof include carboxylic acid polymers such as polyacrylic acid, polymaleic acid, and polymethacrylic acid; and sulfonic acid polymers such as polystyrene sulfonic acid, polyvinyl sulfonic acid, and polyisoprene sulfonic acid. ..
  • the polyanion may be a copolymer of vinyl carboxylic acids or vinyl sulfonic acids and other monomers.
  • examples of other monomers include (meth) acrylate compounds; aromatic vinyl compounds such as styrene and vinylnaphthalene.
  • the polyanion is particularly preferably polystyrene sulfonic acid (PSS).
  • PSS polystyrene sulfonic acid
  • Examples of the complex of the conductive polymer and the dopant include a complex of poly (3,4-ethylenedioxythiophene) and polystyrene sulfonic acid (PEDOT / PSS).
  • ionic surfactant examples include cationic surfactants such as quaternary ammonium salt type, phosphonium salt type and sulfonium salt type; anions such as carboxylic acid type, sulfonate type, sulfate type, phosphate type and phosphite type.
  • Surfactants Amphoteric ionic surfactants such as sulfobetaine type, alkylbetaine type, alkylimidazolium betaine type; polyhydric alcohol derivatives, ⁇ -cyclodextrin inclusion compounds, sorbitan fatty acid monoesters, sorbitan fatty acid diesters, poly Nonionic surfactants such as alkylene oxide derivatives and amine oxides can be mentioned.
  • Examples of the conductive fine particles include metal oxide fine particles such as tin oxide-based, antimony oxide-based, indium oxide-based, and zinc oxide-based, and tin oxide-based fine particles are preferable.
  • Examples of the material of the tin oxide-based fine particles include tin oxide, antimony-doped tin oxide, indium-doped tin oxide, aluminum-doped tin oxide, tungsten-doped tin oxide, titanium oxide-cerium oxide-tin oxide complex, and titanium oxide-oxidation. Examples include a tin complex.
  • the average particle size of the conductive fine particles is, for example, 1 to 100 nm, preferably 2 to 50 nm.
  • the average particle size of the conductive fine particles means a particle size (d50) corresponding to a cumulative volume of 50% in a particle size distribution measured by, for example, a laser diffraction type particle size meter.
  • Examples of the ionic compound include alkali metal salts and / or organic cation-anionic salts.
  • alkali metal salt include organic salts and inorganic salts of alkali metals.
  • the organic cation-anion salt means an organic salt containing an organic cation.
  • the anion contained in the organic cation-anion salt may be an organic anion or an inorganic anion.
  • Organic cation-anionic salts are sometimes referred to as ionic liquids or ionic solids.
  • alkali metal ion contained in the alkali metal salt examples include lithium ion, sodium ion and potassium ion, and lithium ion is preferable.
  • the anion contained in the alkali metal organic salt for example, CH 3 COO -, CF 3 COO -, CH 3 SO 3 -, CF 3 SO 3 -, (CF 3 SO 2) 3 C -, C 4 F 9 SO 3 -, C 3 F 7 COO -, (CF 3 SO 2) (CF 3 CO) N -, - O 3 S (CF 2) 3 SO 3 -, (CN) 2 N - and the following general formula (a )-(D) can be mentioned.
  • the anion contained in the organic salt of the alkali metal preferably contains a fluorine atom. According to the anion containing a fluorine atom, the organic salt of the alkali metal functions as an ionic compound having excellent ionic dissociation properties.
  • the anion contained in the alkali metal inorganic salts for example, Cl -, Br -, I -, AlCl 4 -, Al 2 Cl 7 -, BF 4 -, PF 6 -, ClO 4 -, NO 3 -, AsF 6 -, SbF 6 -, NbF 6 -, TaF 6 -, (FSO 2) 2 N -, CO 3 2- and the like.
  • the anion contained in the alkali metal salts, (CF 3 SO 2) 2 N -, (C 2 F 5 SO 2) 2 N - is represented by (perfluoroalkyl sulfonyl) imide in such above general formula (a) preferably, in particular (CF 3 SO 2) 2 N - represented by (trifluoromethanesulfonyl) imide are preferable.
  • organic salts of alkali metals include sodium acetate, sodium alginate, sodium lignin sulfonate, sodium toluene sulfonate, LiCF 3 SO 3 , Li (CF 3 SO 2 ) 2 N, and Li (C 2 F 5 SO 2 ). 2 N, Li (C 4 F 9 SO 2 ) 2 N, Li (CF 3 SO 2 ) 3 C, KO 3 S (CF 2 ) 3 SO 3 K, LiO 3 S (CF 2 ) 3 SO 3 K, etc.
  • the organic salt of the alkali metal is preferably a fluorine-containing lithium imide salt, and particularly preferably a (perfluoroalkylsulfonyl) imide lithium salt.
  • alkali metal inorganic salt examples include lithium perchlorate and lithium iodide.
  • Examples of the organic cation contained in the organic cation-anion salt include a pyridinium cation, a piperidinium cation, a pyrrolidinium cation, a cation having a pyrrolin skeleton, a cation having a pyrrol skeleton, an imidazolium cation, and a tetrahydropyrimidinium cation.
  • Examples thereof include dihydropyrimidinium cation, pyrazolium cation, pyrazolinium cation, tetraalkylammonium cation, trialkylsulfonium cation, tetraalkylphosphonium cation and the like.
  • the anion contained in the anion salts e.g., Cl - - organic cations, Br -, I -, AlCl 4 -, Al 2 Cl 7 -, BF 4 -, PF 6 -, ClO 4 -, NO 3 -, CH 3 COO -, CF 3 COO - , CH 3 SO 3 -, CF 3 SO 3 -, (CF 3 SO 2) 3 C -, AsF 6 -, SbF 6 -, NbF 6 -, TaF 6 -, (CN) 2 N -, C 4 F 9 SO 3 -, C 3 F 7 COO -, (CF 3 SO 2) (CF 3 CO) N -, (FSO 2) 2 N -, - O 3 S (CF 2) 3 Examples thereof include SO 3 - and anions represented by the above-mentioned general formulas (a) to (d).
  • the anion contained in the organic cation-anion salt preferably contains a fluorine atom. According to the anion containing a fluorine atom, the organic cation-anion salt functions as an ionic compound having excellent ionic dissociation properties.
  • the ionic compound is not limited to the above-mentioned alkali metal salt and organic cation-anionic salt, and examples thereof include inorganic salts such as ammonium chloride, aluminum chloride, copper chloride, ferrous chloride, ferric chloride, and ammonium sulfate. Be done.
  • the conductive material may contain one or more of the above-mentioned ionic compounds.
  • the conductive material is not limited to the above-mentioned materials, for example, carbon materials such as acetylene black, ketjen black, natural graphite, artificial graphite; titanium black; cationic conductive groups such as quaternary ammonium salts, betaine compounds and the like.
  • a polymer having ionic conductivity such as an acrylate having a quaternary ammonium base or a polymer having a structural unit derived from methacrylate
  • examples thereof include those obtained by polymerizing a resin or the like (permanent antistatic agent).
  • the conductive layer 40 may further contain other materials such as a binder in addition to the conductive material.
  • the binder tends to improve, for example, the film-forming property of the conductive material, and also improve the adhesion and adhesiveness (anchoring force) of the conductive layer 40 to the polarizing film 20.
  • the binder include oxazoline group-containing polymers, polyurethane resins, polyester resins, acrylic resins, polyether resins, cellulose resins, polyvinyl alcohol resins, epoxy resins, polyvinylpyrrolidone, polystyrene resins, polyethylene glycol, and the like.
  • Examples thereof include pentaerythritol, preferably an oxazoline group-containing polymer, a polyurethane-based resin, a polyester-based resin, and an acrylic-based resin, and particularly preferably a polyurethane-based resin.
  • the conductive layer 40 may contain one or more of these binders.
  • the content of the binder in the conductive layer 40 is, for example, 1 wt% to 90 wt%, preferably 10 wt% to 80 wt%.
  • the thickness of the conductive layer 40 is, for example, 5 nm to 180 nm, preferably 150 nm, more preferably 120 nm or less, still more preferably 100 nm or less, particularly preferably 80 nm or less, and particularly preferably 50 nm. It is as follows.
  • the thickness of the conductive layer 40 may be 10 nm or more, or 20 nm or more.
  • the loss A of the total light transmittance due to the conductive layer 40 is, for example, 0.9% or less, preferably 0.8% or less, and more preferably 0.6% or less. Yes, more preferably 0.5% or less, particularly preferably 0.4% or less, and particularly preferably less than 0.2%.
  • the lower limit of the loss A is not particularly limited, and is, for example, 0.01%. Loss A can be identified by the following method. First, the total light transmittance T1 of the polarizing film 20 and the total light transmittance T2 of the laminate L composed of the polarizing film 20 and the conductive layer 40 are measured.
  • the total light transmittance T2 of the laminated body L is a value when light is incident from the polarizing film 20 side.
  • the difference (T1-T2) between the total light transmittance T1 and the total light transmittance T2 can be specified as the loss A.
  • the surface resistivity of the conductive layer 40 may be a particularly low value when the loss A is larger than 0.5%.
  • the above loss A is 0.5% or less
  • the surface resistivity of the conductive layer 40 is 1.0 ⁇ 10 6 ⁇ / ⁇ or less.
  • at least one of the above-mentioned loss A of 0.9% or less and the surface resistivity of the conductive layer 40 of 1.0 ⁇ 10 4 ⁇ / ⁇ or less is established. May be good.
  • the anchoring force between the conductive layer 40 and the polarizing film 20 is, for example, 10.0 N / 25 mm or more, preferably 12.0 N / 25 mm or more, more preferably 14.0 N / 25 mm or more, and further preferably 14.0 N / 25 mm or more. It is 18.0 N / 25 mm or more.
  • the above anchoring force can be measured by the following method. First, the polarizing film 15 with an antireflection film to be evaluated is cut into a width of 25 mm and a length of 150 mm to obtain a test piece.
  • the evaluation sheet has a size of 30 mm in width and 150 mm in length, and is not particularly limited as long as it does not peel off from the pressure-sensitive adhesive layer 30 during the test.
  • an ITO film 125 tetraite OES (manufactured by Oike Kogyo Co., Ltd.) or the like) can be used.
  • the pressure-sensitive adhesive layer 30 is a layer containing a pressure-sensitive adhesive.
  • the adhesive contained in the adhesive layer 30 include a rubber adhesive, an acrylic adhesive, a silicone adhesive, a urethane adhesive, a vinyl alkyl ether adhesive, a polyvinylpyrrolidone adhesive, and a polyacrylamide adhesive. Examples thereof include pressure-sensitive adhesives and cellulose-based pressure-sensitive adhesives.
  • the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 30 is acrylic-based because it has excellent optical transparency, has adhesive properties such as appropriate wettability, cohesiveness, and adhesiveness, and is excellent in weather resistance, heat resistance, and the like. Adhesives are preferred.
  • the acrylic pressure-sensitive adhesive contains a (meth) acrylic polymer as a base polymer.
  • the (meth) acrylic polymer contains, for example, a structural unit derived from the (meth) acrylic acid ester as a main component.
  • (meth) acrylic acid means acrylic acid and / or methacrylic acid.
  • Main component means the structural unit contained most in the polymer on a weight basis.
  • the carbon number of the ester portion (the portion other than the (meth) acrylic acid group) contained in the (meth) acrylic acid ester for forming the main skeleton of the (meth) acrylic polymer is not particularly limited, and is, for example, 1 to 18. Is.
  • the ester moiety of the (meth) acrylic acid ester may contain an aromatic ring such as a phenyl group or a phenoxy group, or may contain an alkyl group.
  • the alkyl group may be linear or branched.
  • the (meth) acrylic polymer may contain one or more structural units derived from the (meth) acrylic acid ester.
  • the average value of the carbon number of the ester portion contained in the structural unit derived from the (meth) acrylic acid ester is preferably 3 to 9.
  • the (meth) acrylic polymer preferably has a structural unit derived from the (meth) acrylic acid ester containing an aromatic ring from the viewpoints of adhesive properties, durability, adjustment of phase difference, adjustment of refractive index, and the like.
  • this (meth) acrylic acid ester is suitable for adjusting the refractive index of the pressure-sensitive adhesive layer 30 and reducing the difference in the refractive index between the pressure-sensitive adhesive layer 30 and the adherend (liquid crystal cell). If the difference in refractive index is reduced, the reflection of light at the interface between the pressure-sensitive adhesive layer 30 and the adherend is suppressed, and the visibility of the display can be improved.
  • Examples of the (meth) acrylic acid ester containing an aromatic ring include benzyl (meth) acrylate, phenyl (meth) acrylate, o-phenylphenol (meth) acrylate, phenoxy (meth) acrylate, and phenoxyethyl (meth) acrylate.
  • Examples thereof include (meth) acrylic acid esters containing the biphenyl ring of.
  • benzyl (meth) acrylate and phenoxyethyl (meth) acrylate are preferable from the viewpoint of improving the adhesive properties and durability of the pressure-sensitive adhesive layer 30.
  • the refractive index of the pressure-sensitive adhesive layer 30 When adjusting the refractive index of the pressure-sensitive adhesive layer 30 with a (meth) acrylic acid ester containing an aromatic ring, a structure derived from the (meth) acrylic acid ester containing an aromatic ring in all the constituent units of the (meth) acrylic polymer.
  • the content of the unit is preferably 3% by weight to 25% by weight.
  • the content is more preferably 22% by weight or less, further preferably 20% by weight or less. This content is more preferably 8% by weight or more, further preferably 12% by weight or more.
  • the content of the structural unit derived from the (meth) acrylic acid ester containing an aromatic ring is 25% by weight or less, light leakage of the liquid crystal display device due to shrinkage of the polarizing film 20 can be suppressed, and the pressure-sensitive adhesive layer 30 There is a tendency to improve reworkability.
  • this content is 3% by weight or more, there is a tendency that light leakage of the liquid crystal display device can be sufficiently suppressed.
  • the (meth) acrylic polymer has a (meth) acryloyl group, a vinyl group, etc., in addition to the structural units derived from the (meth) acrylic acid ester containing the aromatic ring described above. It may have one or more structural units derived from a copolymerizable monomer having a polymerizable functional group containing an unsaturated double bond.
  • the copolymerization monomer include 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxyhexyl (meth) acrylate.
  • Hydroxyl group-containing monomers such as 8-hydroxyoctyl acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate, and (4-hydroxymethylcyclohexyl) methyl acrylate; (meth) acrylate.
  • Examples of the above-mentioned copolymerization monomer include (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide and the like.
  • Alkyl ester-based monomers such as methoxyethyl acrylate and ethoxyethyl (meth) acrylate; N- (meth) acryloyloxymethylene succinimide, N- (meth) acryloyl-6 -Succinimide-based monomers such as -oxyhexamethylene succinimide, N- (meth) acryloyl-8-oxyoctamethylene succinimide; morpholinic monomers such as N-acryloylmorpholin; N-cyclohexylmaleimide, N-isopropylmaleimide, N-laurylmaleimide, Maleimide-based monomers such as N-phenylmaleimide; N-methylitaconimide, N-ethylitaconimide, N-butylitaconimide, N-octylitaconimide, N-2-ethylhexylitacon
  • Examples of the copolymerization monomer include vinyl acetate, vinyl propionate, N-vinylpyrrolidone, methylvinylpyrrolidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperazine, vinylpyrazine, vinylpyrrole, vinylimidazole, vinyloxazole, and vinyl.
  • Vinyl-based monomers such as morpholin, N-vinylcarboxylic acid amides, styrene, ⁇ -methylstyrene, N-vinylcaprolactam; cyanoacrylate-based monomers such as acrylonitrile and methacrylonitrile; containing epoxy groups such as glycidyl (meth) acrylate.
  • Acrylic monomer such as (meth) polyethylene glycol acrylate, (meth) polypropylene glycol acrylate, methoxyethylene glycol (meth) acrylate, methoxypolypropylene glycol (meth) acrylate; (meth) acrylic acid Acrylic acid ester-based monomers such as tetrahydrofurfuryl, fluorine (meth) acrylate, silicone (meth) acrylate, and 2-methoxyethyl acrylate can also be mentioned.
  • examples of the copolymerization monomer include olefin monomers such as isoprene, butadiene, and isobutylene; and ether group-containing vinyl monomers such as vinyl ether.
  • Examples of the above-mentioned copolymerization monomer include 3-acryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-vinylbutyltriethoxysilane, and 8-vinyloctyltri.
  • Silanes such as methoxysilane, 8-vinyloctyltriethoxysilane, 10-methacryloyloxydecyltrimethoxysilane, 10-acryloyloxydecyltrimethoxysilane, 10-methacryloyloxydecyltriethoxysilane, 10-acryloyloxydecyltriethoxysilane, etc.
  • Monomers can also be mentioned.
  • copolymerization monomer examples include tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and bisphenol A diglycidyl ether di (meth) acrylate.
  • the content of the structural unit derived from the above-mentioned copolymerization monomer in the (meth) acrylic polymer is not particularly limited, and is, for example, 0 wt% to 20 wt%, preferably 0.1 wt% to 15 wt%, more preferably. Is 0.1 wt% to 10 wt%.
  • a hydroxyl group-containing monomer and a carboxyl group-containing monomer are preferable from the viewpoint of adhesiveness and durability.
  • a hydroxyl group-containing monomer and a carboxyl group-containing monomer may be used in combination.
  • the copolymerized monomer functions as a reaction point with the cross-linking agent, for example, when the pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer 30 contains a cross-linking agent. Since the hydroxyl group-containing monomer and the carboxyl group-containing monomer are excellent in reactivity with the intermolecular cross-linking agent, they are suitable for improving the cohesiveness and heat resistance of the obtained pressure-sensitive adhesive layer 30. In particular, the hydroxyl group-containing monomer is suitable for improving the reworkability of the pressure-sensitive adhesive layer 30.
  • the carboxyl group-containing monomer is suitable for achieving both durability and reworkability of the pressure-sensitive adhesive layer 30.
  • the content of the structural unit derived from the hydroxyl group-containing monomer in the (meth) acrylic polymer is preferably 0.01 wt% to 15 wt%, preferably 0.03 wt%. It is more preferably about 10 wt%, and even more preferably 0.05 wt% to 7 wt%.
  • the content of the structural unit derived from the carboxyl group-containing monomer in the (meth) acrylic polymer is preferably 0.05 wt% to 10 wt%, preferably 0.1 wt%. It is more preferably about 8 wt%, and even more preferably 0.2 wt% to 6 wt%.
  • the weight average molecular weight of the (meth) acrylic polymer is, for example, 500,000 to 3 million, preferably 700,000 to 2.7 million, and more preferably 800,000 to 2.5 million from the viewpoint of durability, particularly heat resistance. is there.
  • the weight average molecular weight of the (meth) acrylic polymer is 500,000 or more, the pressure-sensitive adhesive layer 30 tends to have sufficient heat resistance for practical use.
  • the weight average molecular weight of the (meth) acrylic polymer is 3 million or less, the viscosity of the coating liquid for producing the pressure-sensitive adhesive layer 30 tends to be easily adjusted.
  • the weight average molecular weight refers to a value obtained by converting the measurement result by GPC (gel permeation chromatography) into polystyrene.
  • the (meth) acrylic polymer can be produced by known polymerization reactions such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerizations.
  • the (meth) acrylic polymer may be a random copolymer, a block copolymer, or a graft copolymer.
  • the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer 30 may have a structure in which the base polymer is crosslinked by a cross-linking agent.
  • a cross-linking agent for example, when a (meth) acrylic polymer is used as the base polymer, an organic cross-linking agent or a polyfunctional metal chelate can be used as the cross-linking agent.
  • the organic cross-linking agent include isocyanate-based cross-linking agents, peroxide-based cross-linking agents, epoxy-based cross-linking agents, and imine-based cross-linking agents.
  • the polyfunctional metal chelate means that the polyvalent metal is covalently or coordinated with an organic compound.
  • Examples of the atoms constituting the polyvalent metal include Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, and so on. Sn, Ti and the like can be mentioned.
  • the organic compound contained in the polyfunctional metal chelate contains, for example, an oxygen atom. Examples of this organic compound include alkyl esters, alcohol compounds, carboxylic acid compounds, ether compounds, ketone compounds and the like.
  • the amount of the cross-linking agent used is preferably 3 parts by weight or less, more preferably 0.01 to 3 parts by weight, and 0.02 to 2 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer. More preferably, 0.03 to 1 part by weight is particularly preferable.
  • the pressure-sensitive adhesive layer 30 may further contain a material other than the pressure-sensitive adhesive.
  • Other materials include, for example, conductive materials, silane coupling agents and other additives.
  • the conductive material is suitable for reducing the surface resistivity of the pressure-sensitive adhesive layer 30 and preventing display defects due to charging of the liquid crystal display device. Examples of the conductive material include those described above in the conductive layer 40.
  • the conductive material contained in the pressure-sensitive adhesive layer 30 is preferably an ionic compound from the viewpoint of compatibility with the base polymer and transparency of the pressure-sensitive adhesive layer 30.
  • the pressure-sensitive adhesive layer 30 contains an acrylic pressure-sensitive adhesive containing a (meth) acrylic polymer as a base polymer, it is preferable to use an ionic compound as the conductive material.
  • the ionic compound is preferably an ionic liquid from the viewpoint of antistatic performance.
  • the pressure-sensitive adhesive layer 30 preferably contains 0.05 to 20 parts by weight of a conductive material (for example, an ionic compound) with respect to 100 parts by weight of the base polymer (for example, (meth) acrylic polymer) of the pressure-sensitive adhesive.
  • a conductive material for example, an ionic compound
  • the base polymer for example, (meth) acrylic polymer
  • the pressure-sensitive adhesive layer 30 preferably contains 0.1 part by weight or more of the conductive material, and more preferably 0.5 part by weight or more, based on 100 parts by weight of the base polymer of the pressure-sensitive adhesive.
  • the pressure-sensitive adhesive layer 30 preferably contains 20 parts by weight or less of a conductive material with respect to 100 parts by weight of the base polymer of the pressure-sensitive adhesive. It is more preferable to include the following.
  • additives include, for example, polyether compounds such as polyalkylene glycol (for example, polypropylene glycol), colorants, pigments, dyes, surfactants, plasticizers, tackifiers, surface lubricants, leveling agents, etc. It can be appropriately used depending on the application in which a softener, an antioxidant, an antioxidant, a light stabilizer, an ultraviolet absorber, a polymerization inhibitor, an inorganic filler, an organic filler, a metal powder, or the like is used.
  • the additive may be in the form of powder, in the form of particles, or in the form of foil.
  • a redox system may be constructed by using a reducing agent as an additive within a controllable range.
  • the pressure-sensitive adhesive layer 30 preferably contains 5 parts by weight or less of other additives with respect to 100 parts by weight of the base polymer (for example, (meth) acrylic polymer) of the pressure-sensitive adhesive, and more preferably 3 parts by weight or less. It is preferable, and it is more preferable to contain 1 part by weight or less.
  • the base polymer for example, (meth) acrylic polymer
  • the thickness of the pressure-sensitive adhesive layer 30 is not particularly limited, and is, for example, 5 to 100 ⁇ m, preferably 10 to 50 ⁇ m.
  • the surface resistivity of the pressure-sensitive adhesive layer 30 is not particularly limited , but may be less than 1.0 ⁇ 10 14 ⁇ / ⁇ and 1.0 ⁇ 10 12 ⁇ / ⁇ or less. Is preferable.
  • the lower limit of the surface resistivity of the adhesive layer 30 is not particularly limited, from the viewpoint of durability, for example, 1.0 ⁇ 10 8 ⁇ / ⁇ is.
  • the surface resistivity of the pressure-sensitive adhesive layer 30 can be measured by the following method. First, a laminate in which the surface of the pressure-sensitive adhesive layer 30 is exposed to the outside is prepared.
  • Examples of such a laminate include a laminate in which the pressure-sensitive adhesive layer 30 is arranged on a separator film such as a polyethylene terephthalate film. Next, the surface resistivity of the surface of the pressure-sensitive adhesive layer 30 in the prepared laminate is measured.
  • the surface resistivity can be measured by using High Restor-UP MCP-HT450 (manufactured by Mitsubishi Chemical Analytech Co., Ltd.) in accordance with the method specified in JIS K6911: 1995. The measured value obtained by this measurement can be regarded as the surface resistivity of the pressure-sensitive adhesive layer 30.
  • the polarizing film 15 with an antireflection film may further include a layer other than the antireflection film 10, the polarizing film 20, the conductive layer 40, and the pressure-sensitive adhesive layer 30.
  • the polarizing film 15 with an antireflection film may include one or more other layers.
  • the other layer is arranged on the visual side of the antireflection film 10, for example, and is in contact with the antireflection film 10. Examples of the other layer include a surface protective film and a retardation film.
  • the surface protective film has, for example, a support film and an adhesive layer arranged on at least one side of the support film.
  • the pressure-sensitive adhesive layer of the surface protective film may contain a light release agent, a conductive material, or the like.
  • the antireflection film 10 is made to contain the conductive material by attaching the surface protective film to the antireflection film 10 and then peeling off the surface protective film.
  • a conductive function can be imparted to the surface. Examples of the conductive material include those described above in the conductive layer 40.
  • the pressure-sensitive adhesive layer of the surface protective film contains a light peeling agent together with the conductive material.
  • the light release agent include silicone resins such as polyorganosiloxane.
  • the other layer may include an easy-adhesion layer for improving the adhesion between the members.
  • the easy-adhesion layer may be arranged on the surface of the polarizing film 20.
  • the surface of the polarizing film 20 may be subjected to an easy-adhesion treatment such as a corona treatment or a plasma treatment.
  • the polarizing film 15 with an antireflection film having the conductive layer 40 can be produced, for example, by the following method.
  • a solution or dispersion of the conductive material is prepared.
  • the solvent of the solution or dispersion is, for example, water, and may further contain a water-soluble organic solvent.
  • the water-soluble organic solvent include methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butanol, n-amyl alcohol, isoamyl alcohol, sec-amyl alcohol, and tert-.
  • examples thereof include alcohols such as amyl alcohol, 1-ethyl-1-propanol, 2-methyl-1-butanol, n-hexanol and cyclohexanol.
  • a solution or dispersion of the conductive material is applied to the surface of the polarizing film 20.
  • the conductive layer 40 is formed on the polarizing film 20.
  • a laminated body L composed of the polarizing film 20 and the conductive layer 40 is obtained.
  • the antireflection film 10 (or 11) is placed on the polarizing film 20 of the laminated body L to prepare the laminated body L1.
  • a solution containing the pressure-sensitive adhesive is prepared.
  • a coating film is obtained by applying this solution to the surface of the separator.
  • the separator is not particularly limited, and for example, a polyethylene terephthalate film treated with a silicone-based release agent can be used.
  • the pressure-sensitive adhesive layer 30 is formed on the separator by drying the coating film. By transferring the obtained pressure-sensitive adhesive layer 30 onto the conductive layer 40 of the laminated body L1, the polarizing film 15 with an antireflection film can be produced.
  • the liquid crystal cell 25 includes, for example, a liquid crystal layer 50, a first transparent substrate 60, and a second transparent substrate 70.
  • the liquid crystal layer 50 is arranged between, for example, the first transparent substrate 60 and the second transparent substrate 70, and is in contact with each of the first transparent substrate 60 and the second transparent substrate 70.
  • the pressure-sensitive adhesive layer 30 of the polarizing film 15 with an antireflection film is in contact with, for example, the first transparent substrate 60 of the liquid crystal cell 25.
  • the liquid crystal panel 100 does not have an ITO layer between the pressure-sensitive adhesive layer 30 and the first transparent substrate 60, for example.
  • the liquid crystal layer 50 contains, for example, liquid crystal molecules homogenically oriented in the absence of an electric field.
  • the liquid crystal layer 50 containing such liquid crystal molecules is suitable for an IPS (In-Plane-Switching) method.
  • the liquid crystal layer 50 may be used for a TN (Twisted Nematic) type, an STN (Super Twisted Nematic) type, a ⁇ type, a VA (Vertical Alignment) type, or the like.
  • the thickness of the liquid crystal layer 50 is, for example, 1.5 ⁇ m to 4 ⁇ m.
  • Examples of the material of the first transparent substrate 60 and the second transparent substrate 70 include glass and polymer.
  • a transparent substrate made of a polymer may be referred to as a polymer film.
  • Examples of the polymer constituting the transparent substrate include polyethylene terephthalate, polycycloolefin, polycarbonate and the like.
  • the thickness of the transparent substrate made of glass is, for example, 0.1 mm to 1 mm.
  • the thickness of the transparent substrate made of the polymer is, for example, 10 ⁇ m to 200 ⁇ m.
  • the liquid crystal cell 25 may further include a layer other than the liquid crystal layer 50, the first transparent substrate 60, and the second transparent substrate 70.
  • Other layers include, for example, color filters, easy-adhesion layers and hard coat layers.
  • the color filter is arranged, for example, on the visual side of the liquid crystal layer 50, and is preferably located between the first transparent substrate 60 and the pressure-sensitive adhesive layer 30 of the polarizing film 15 with an antireflection film.
  • the easy-adhesion layer and the hard coat layer are arranged on the surface of the first transparent substrate 60 or the second transparent substrate 70, for example.
  • the liquid crystal panel 100 may further include members other than the polarizing film 15 with an antireflection film and the liquid crystal cell 25.
  • the liquid crystal panel 100 may further include a conductive structure (not shown) that is electrically connected to the side surface of the polarizing film 15 with an antireflection film. If the conductive structure is connected to the ground, it is easy to prevent the polarizing film 15 with the antireflection film from being charged by static electricity.
  • the conductive structure may cover the entire side surface of the polarizing film 15 with the antireflection film, or may partially cover the side surface of the polarizing film 15 with the antireflection film.
  • the ratio of the side area of the antireflection film 15 covered by the conductive structure to the total area of the side surface of the antireflection film 15 is, for example, 1% or more, preferably 3% or more.
  • Examples of the material of the conductive structure include a conductive paste composed of a metal such as silver and gold; a conductive adhesive; and other conductive materials.
  • the conductive structure may be wiring extending from the side surface of the polarizing film 15 with an antireflection film.
  • the liquid crystal panel 100 may further include an optical film other than the polarizing film 20.
  • optical films include films used in liquid crystal display devices such as polarizing films, reflectors, antitransmissive plates, retardation films, viewing angle compensation films, and brightness improving films.
  • the retardation film includes, for example, a 1/2 wave plate, a 1/4 wave plate, and the like.
  • the liquid crystal panel 100 may include one or more of these other optical films.
  • the polarizing film is bonded to the second transparent substrate 70 of the liquid crystal cell 25 via, for example, an adhesive layer.
  • This polarizing film has, for example, the above-described configuration of the polarizing film 20.
  • the transmission axis (or absorption axis) of the polarizer is, for example, orthogonal to the transmission axis (or absorption axis) of the polarizer in the polarizing film 20.
  • the above-mentioned pressure-sensitive adhesive layer 30 can be used as the material of the pressure-sensitive adhesive layer for bonding the polarizing film and the second transparent substrate 70.
  • the thickness of the pressure-sensitive adhesive layer is not particularly limited, and is, for example, 1 to 100 ⁇ m, preferably 2 to 50 ⁇ m, more preferably 2 to 40 ⁇ m, and further preferably 5 to 35 ⁇ m.
  • the surface resistivity of the conductive layer 40 of the polarizing film 15 with an antireflection film is adjusted to 1.0 ⁇ 10 6 ⁇ / ⁇ or less in an environment where static electricity is likely to occur. Even so, it is possible to prevent display defects due to charging of the liquid crystal display device.
  • the liquid crystal panel 100 shows good results when an ESD (Electro-Static Discharge) test is performed.
  • the ESD test is carried out by, for example, the following method. First, the liquid crystal panel 100 is set on the backlight device. Next, static electricity is applied to the visible side (antireflection film 10 side) of the liquid crystal panel 100.
  • an electrostatic discharge gun whose applied voltage is adjusted to 10 kV is used.
  • a part of the liquid crystal panel 100 becomes white.
  • the time T from when static electricity is applied until the white spot disappears is measured.
  • the time T is, for example, 10 seconds or less, preferably 1 second or less, and more preferably 0.5 seconds or less.
  • the ESD test is performed under the conditions of 23 ° C. and 55% RH.
  • the present inventors greatly increase the reflection of light on the liquid crystal panel 100 by adopting a configuration in which a conductive layer such as an ITO layer is not provided between the polarizing film 15 with an antireflection film and the liquid crystal cell 25. We have newly found that it can be suppressed.
  • the liquid crystal panel 100 is suitable for applications that require good visibility, especially for in-vehicle displays. Examples of the in-vehicle display include a car navigation device panel, a cluster panel, and a mirror display.
  • the cluster panel is a panel that displays the running speed of the vehicle, the number of revolutions of the engine, and the like.
  • the liquid crystal panel 100 is suitable for applications that do not require a touch sensor, such as a cluster panel or a mirror display.
  • the polarizing film 15 with an antireflection film included in the liquid crystal panel 100 may further include members other than the above-mentioned members.
  • the polarizing film 16 with an antireflection film further includes a transparent substrate 45 and an adhesive layer 46 arranged between the antireflection film 10 and the polarizing film 20.
  • the structure of the liquid crystal panel 110 is the same as that of the liquid crystal panel 100, except for the transparent substrate 45 and the adhesive layer 46. Therefore, the same reference numerals may be given to the elements common to the liquid crystal panel 100 and the liquid crystal panel 110 of the modified example, and the description thereof may be omitted. That is, the following description of each embodiment applies to each other as long as there is no technical contradiction. The following embodiments may be combined with each other as long as they are not technically inconsistent.
  • the transparent substrate 45 is in contact with, for example, the first high refractive index layer 1 of the antireflection film 10.
  • the polarizing film 16 with an antireflection film may have the antireflection film 11 described with reference to FIG. 3 instead of the antireflection film 10.
  • the adhesive layer 6 of the antireflection film 11 is in contact with the transparent substrate 45.
  • the pressure-sensitive adhesive layer 46 is arranged between, for example, the transparent substrate 45 and the polarizing film 20, and is in contact with each of the transparent substrate 45 and the polarizing film 20.
  • the transparent substrate 45 those described above for the first transparent substrate 60 and the second transparent substrate 70 can be used, and are preferably made of glass.
  • the transparent substrate 45 made of glass may be referred to as "cover glass”.
  • the pressure-sensitive adhesive layer 46 the above-mentioned pressure-sensitive adhesive layer 30 can be used.
  • the pressure-sensitive adhesive layer 46 preferably contains a commercially available optical transparent pressure-sensitive adhesive (OCA: Optical Clear Adhesive).
  • OCA optical Clear Adhesive
  • the pressure-sensitive adhesive layer 46 can be formed by using, for example, a pressure-sensitive adhesive tape such as LUCIACS® CS9621T.
  • the liquid crystal panel 100 or 110 may further include a touch sensor or a touch panel.
  • FIG. 5 shows a liquid crystal panel 120 provided with a touch panel 80. Except for the touch panel 80, the structure of the liquid crystal panel 120 is the same as that of the liquid crystal panel 100.
  • the touch panel 80 is arranged on the visual side of the antireflection film 10, for example.
  • the touch panel 80 is not in contact with the polarizing film 15 with an antireflection film, and a gap (air layer) is formed between the touch panel 80 and the polarizing film 15 with an antireflection film.
  • the liquid crystal panel 120 is a so-called out-cell type liquid crystal panel.
  • As the touch panel 80 an optical method, an ultrasonic method, a capacitance method, a resistance film method, or the like can be adopted.
  • the touch panel 80 is of the resistive film type, the touch panel 80 has, for example, a structure in which two electrode plates having a transparent conductive thin film are arranged so as to face each other via a spacer.
  • the touch panel 80 is of the capacitance type, the touch panel 80 is made of, for example, a transparent conductive film provided with a transparent conductive thin film having a predetermined pattern shape.
  • the liquid crystal display device of the present embodiment includes, for example, a liquid crystal panel 100 and a lighting system.
  • the liquid crystal panel 110 or 120 can be used instead of the liquid crystal panel 100.
  • the liquid crystal panel 100 is arranged on the visual side of the lighting system, for example.
  • the lighting system has, for example, a backlight or a reflector and irradiates the liquid crystal panel 100 with light.
  • HLC-8120GPC manufactured by Tosoh Corporation -Column: Tosoh, G7000H XL + GMH XL + GMH XL -Column size: 7.8 mm ⁇ x 30 cm each 90 cm in total -Column temperature: 40 ° C ⁇
  • ⁇ Adhesive layer A> First, 76.9 parts of butyl acrylate, 18 parts of benzyl acrylate, 5 parts of acrylic acid, and 0.1 part of 4-hydroxybutyl acrylate were placed in a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube and a cooler. was charged to obtain a monomer mixture. Further, 0.1 part of 2,2'-azobisisobutyronitrile was charged together with 100 parts of ethyl acetate as a polymerization initiator with respect to 100 parts of the monomer mixture (solid content). Nitrogen gas was introduced into the flask and replaced with nitrogen while gently stirring the mixture.
  • an isocyanate cross-linking agent (Coronate L manufactured by Toso Co., Ltd., trimethylolpropane tolylene diisocyanate) and 0.1 part of peroxide cross-linking with respect to 100 parts of the solid content of the acrylic polymer solution.
  • Acrylic-based by further blending an agent Niper BMT manufactured by Nippon Oil & Fats Co., Ltd.
  • a silane coupling agent KBM-403, ⁇ -glycidoxypropylmethoxysilane manufactured by Shinetsu Chemical Industry Co., Ltd.
  • the obtained solution was applied to one side of a separator (MRF38 manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.).
  • the separator was a polyethylene terephthalate film treated with a silicone-based release agent.
  • the obtained coating film was dried at 155 ° C. for 1 minute to form an adhesive layer A on the surface of the separator.
  • the thickness of the pressure-sensitive adhesive layer A was 20 ⁇ m.
  • ⁇ Adhesive layer B> A solution of an acrylic pressure-sensitive adhesive composition was prepared by further blending 1 part of bis (trifluoromethanesulfonyl) imidelithium (LiTFSI, manufactured by Mitsubishi Materials Corporation) with respect to 100 parts of the solid content of the solution of the acrylic polymer. Except for this, the pressure-sensitive adhesive layer B was prepared by the same method as the pressure-sensitive adhesive layer A.
  • ⁇ Adhesive layer C> a monomer is charged by charging 94.9 parts of butyl acrylate, 5 parts of acrylic acid, and 0.1 part of 4-hydroxybutyl acrylate into a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube and a cooler. A mixture was obtained. Further, 0.1 part of 2,2'-azobisisobutyronitrile was charged together with 100 parts of ethyl acetate as a polymerization initiator with respect to 100 parts of the monomer mixture (solid content). Nitrogen gas was introduced into the flask and replaced with nitrogen while gently stirring the mixture.
  • an isocyanate cross-linking agent (Coronate L manufactured by Toso Co., Ltd., trimethylolpropane tolylene diisocyanate) and 0.1 part of peroxide cross-linking with respect to 100 parts of the solid content of the acrylic polymer solution.
  • Acrylic-based by further blending an agent Niper BMT manufactured by Nippon Oil & Fats Co., Ltd.
  • a silane coupling agent KBM-403, ⁇ -glycidoxypropylmethoxysilane manufactured by Shinetsu Chemical Industry Co., Ltd.
  • the obtained solution was applied to one side of a separator (MRF38 manufactured by Mitsubishi Chemical Polyester Film Co., Ltd.).
  • the separator was a polyethylene terephthalate film treated with a silicone-based release agent.
  • the obtained coating film was dried at 155 ° C. for 1 minute to form an adhesive layer C on the surface of the separator.
  • the thickness of the pressure-sensitive adhesive layer C was 12 ⁇ m.
  • ⁇ Anti-reflective coating AR1> As a resin for forming the anti-glare layer, 50 parts by weight of an ultraviolet curable urethane acrylate resin (manufactured by Mitsubishi Chemical Corporation, trade name “UV1700TL”, solid content concentration 80% by weight) and pentaerythritol triacrylate are used. 50 parts by weight of a polyfunctional acrylate (manufactured by Osaka Organic Chemical Corporation, trade name "Viscoat # 300", solid content concentration 100% by weight) as a main component was prepared.
  • an ultraviolet curable urethane acrylate resin manufactured by Mitsubishi Chemical Corporation, trade name "UV1700TL”, solid content concentration 80% by weight
  • pentaerythritol triacrylate 50 parts by weight of a polyfunctional acrylate (manufactured by Osaka Organic Chemical Corporation, trade name "Viscoat # 300", solid content concentration 100% by weight) as a main component was prepared.
  • Particles containing a copolymer of (meth) acrylic acid ester and styrene per 100 parts by weight of solid content of these resins (manufactured by Sekisui Kasei Kogyo Co., Ltd., trade name “Techpolymer SSX504TNR”, weight average particle size: 3 .0 ⁇ m) by 4 parts by weight, synthetic smectite (manufactured by Kunimine Kogyo Co., Ltd., trade name “Smecton SAN”), which is an organic clay as a tyrenetropy-imparting agent, by 1.5 parts by weight, photopolymerization initiator (manufactured by BASF, product) 3 parts by weight of the name "OMNIRAD907”) and 0.015 parts by weight of a leveling agent (manufactured by DIC Co., Ltd., trade name "GRANDIC PC4100", solid content concentration 10% by weight) were mixed. This mixture is diluted with a
  • TAC triacetyl cellulose
  • TD60UL triacetyl cellulose
  • a material (coating liquid) for forming an anti-glare layer was applied to one side of this transparent plastic film (TAC film) using a bar coater to form a coating film.
  • the coating film was dried by heating the transparent plastic film on which the coating film was formed at 80 ° C. for 1 minute.
  • this coating film was cured by irradiating it with ultraviolet rays having an integrated light intensity of 300 mJ / cm 2 with a high-pressure mercury lamp.
  • an anti-glare layer having a thickness of 8.0 ⁇ m was formed, and a TAC film with an anti-glare layer was obtained.
  • the haze of the TAC film with the anti-glare layer was 8%.
  • this TAC film with an anti-glare layer was introduced into a roll-to-roll type sputter film forming apparatus, and the surface of the anti-glare layer was subjected to bombard treatment (plasma treatment with Ar gas) by running the film.
  • a SiO x layer (x ⁇ 2) having a physical film thickness of 3 nm was formed as an adhesion layer on the surface of the anti-glare layer.
  • an Nb 2 O 5 layer (first high refractive index layer) having a physical film thickness of 12 nm, a SiO 2 layer (first low refractive index layer) having a physical film thickness of 29 nm, and physical
  • An Nb 2 O 5 layer (second high refractive index layer) having a film thickness of 116 nm and a SiO 2 layer (second low refractive index layer) having a physical film thickness of 78 nm are formed in this order to prepare a laminate a. did.
  • the amount of oxygen introduced was adjusted by plasma emission monitoring (PEM) control while keeping the pressure inside the apparatus constant by adjusting the amount of argon introduced and the amount of exhaust gas.
  • PEM plasma emission monitoring
  • a layer made of a fluororesin (physical film thickness: 9 nm) was formed as an antifouling layer on the surface of the second low refractive index layer (SiO 2 layer) of the laminated body a. Further, the antireflection film AR1 was produced by transferring the pressure-sensitive adhesive layer C to the surface of the TAC film of the laminated body a.
  • Antireflection films AR2 to AR10 were prepared by the same method as the antireflection film AR1 except that the physical film thickness of each layer was changed to the value shown in Table 1.
  • an acrylic film was produced by the following method. 8,000 g of methyl methacrylate (MMA) and 2,000 g of methyl 2- (hydroxymethyl) acrylate (MHMA) in a 30 L pot-type reactor equipped with a stirrer, temperature sensor, cooling tube, and nitrogen introduction tube. ), 10,000 g of 4-methyl-2-pentanone (methyl isobutyl ketone, MIBK) and 5 g of n-dodecyl mercaptan were charged. While introducing nitrogen into the reactor, the mixture in the reactor was heated to 105 ° C. and refluxed.
  • MMA methyl methacrylate
  • MHMA methyl 2- (hydroxymethyl) acrylate
  • t-butylperoxyisopropyl carbonate (Kayacarboxylic BIC-7, manufactured by Kayaku Akzo) was added as a polymerization initiator, and 10.0 g of t-butylperoxyisopropyl carbonate and 230 g of MIBK were added.
  • a solution consisting of the above was added dropwise over 4 hours to carry out solution polymerization.
  • Solution polymerization was carried out at about 105-120 ° C. under reflux. After dropping the solution, aging was carried out for an additional 4 hours.
  • a stearyl phosphate / distearyl phosphate mixture (Phoslex A-18, manufactured by Sakai Chemical Industry Co., Ltd.) was added to the obtained polymer solution, and the mixture was cyclized at about 90 to 120 ° C. for 5 hours under reflux. A condensation reaction was carried out. Next, the obtained solution was subjected to a vent type screw twin-screw extruder having a barrel temperature of 260 ° C., a rotation speed of 100 rpm, a decompression degree of 13.3 to 400 hPa (10 to 300 mmHg), one rear vent, and four fore vents.
  • a vent type screw twin-screw extruder having a barrel temperature of 260 ° C., a rotation speed of 100 rpm, a decompression degree of 13.3 to 400 hPa (10 to 300 mmHg), one rear vent, and four fore vents.
  • the lactone ring-containing polymer had a weight average molecular weight of 133,000, a melt flow rate of 6.5 g / 10 min, and a glass transition temperature of 131 ° C.
  • the obtained pellets and acrylonitrile-styrene (AS) resin (Toyo AS, AS20, manufactured by Toyo Styrene Co., Ltd.) are kneaded and extruded at a mass ratio of 90/10 using a single-screw extruder (screw 30 mm ⁇ ). Clear pellets were obtained.
  • the glass transition temperature of the obtained pellet was 127 ° C.
  • a film having a thickness of 120 ⁇ m was produced by melt-extruding the pellets from a coat hanger type T die having a width of 400 mm using a 50 mm ⁇ single-screw extruder.
  • a stretched film (acrylic film) having a thickness of 30 ⁇ m was obtained by stretching the film 2.0 times in length and 2.0 times in width under a temperature condition of 150 ° C. using a biaxial stretching device. When the optical characteristics of this stretched film were measured, the total light transmittance was 93%, the in-plane retardation ⁇ nd was 0.8 nm, and the thickness direction retardation Rth was 1.5 nm.
  • the polarizing film P1 was produced by the following method. First, a polyvinyl alcohol film having a thickness of 45 ⁇ m is dyed in an iodine solution (temperature 30 ° C.) having a concentration of 0.3% for 1 minute between a plurality of rolls having different velocity ratios, and the stretching ratio is tripled. It was stretched as follows. Next, the obtained stretched film was immersed in an aqueous solution (temperature 60 ° C.) having a boric acid concentration of 4% and a potassium iodide concentration of 10% for 0.5 minutes, and the total stretching ratio was 6. It was stretched to double.
  • aqueous solution temperature 60 ° C.
  • the stretched film was washed by immersing it in an aqueous solution (temperature 30 ° C.) containing potassium iodide having a concentration of 1.5% for 10 seconds.
  • the stretched film was dried at 50 ° C. for 4 minutes to obtain a polarizer having a thickness of 18 ⁇ m.
  • a 40 ⁇ m-thick TAC film (manufactured by Konica Minolta, trade name “KC4UY”) was attached to one main surface of the obtained polarizer via a polyvinyl alcohol-based adhesive.
  • the above-mentioned acrylic film having a thickness of 30 ⁇ m was attached to the other main surface of the polarizer via a polyvinyl alcohol-based adhesive.
  • a polarizing film P1 was obtained.
  • Example 1 a coating solution having a solid content concentration of 0.5% by weight was prepared by mixing 50 parts of a solution containing PEDOT / PSS (Denatron PT-436 manufactured by Nagase ChemteX Corporation) and 50 parts of water. Next, the coating liquid was applied to the surface of the polarizing film P1 on the acrylic film side. A conductive layer was prepared by drying the obtained coating film at 80 ° C. for 2 minutes. As a result, a polarizing film with a conductive layer was obtained. The thickness of the conductive layer was 30 nm.
  • the adhesive layer C of the antireflection film AR1 was attached to the surface of the TAC film of the polarizing film P1. Further, by transferring the pressure-sensitive adhesive layer A to the surface of the conductive layer, the polarizing film with an antireflection film of Example 1 having the structure of the antireflection film AR1 / polarizing film P1 / conductive layer / pressure-sensitive adhesive layer A was produced. ..
  • Example 2 The polarizing film with an antireflection film of Example 2 was produced by the same method as in Example 1 except that the coating liquid of PEDOT / PSS was applied to the polarizing film P1 so that the thickness of the conductive layer was 90 nm.
  • Examples 3 to 12 and Comparative Examples 1 to 2 The polarizing films with antireflection films of Examples 3 to 12 and Comparative Examples 1 and 2 were prepared by the same method as in Example 1 except that the antireflection film, the conductive layer and the pressure-sensitive adhesive layer were changed to the combinations shown in Table 2. Made.
  • the pressure-sensitive adhesive layer A was directly bonded to the surface of the polarizing film P1 on the acrylic film side without forming a conductive layer on the polarizing film P1.
  • a coating solution having a solid content concentration of 0.27% by weight was prepared by mixing 9 parts of a solution containing PEDOT / PSS (Denatron P-580W manufactured by Nagase ChemteX Corporation) and 91 parts of water. Next, the coating liquid was applied to the surface of the polarizing film P1 on the acrylic film side. A conductive layer was prepared by drying the obtained coating film at 80 ° C. for 2 minutes. As a result, a polarizing film with a conductive layer was obtained. The thickness of the conductive layer was 100 nm.
  • the adhesive layer C of the antireflection film AR4 was attached to the surface of the TAC film of the polarizing film P1. Further, by transferring the pressure-sensitive adhesive layer A to the surface of the conductive layer, the polarizing film with an antireflection film of Example 13 having the structure of the antireflection film AR4 / polarizing film P1 / conductive layer / pressure-sensitive adhesive layer A was produced. ..
  • the obtained coating liquid was applied to the main surface of the polarizing film P1 on the acrylic film side.
  • a conductive layer was prepared by drying the obtained coating film at 80 ° C. for 2 minutes. As a result, a polarizing film with a conductive layer was obtained.
  • the thickness of the conductive layer was 60 nm.
  • the adhesive layer C of the antireflection film AR10 was attached to the surface of the TAC film of the polarizing film P1. Further, by transferring the pressure-sensitive adhesive layer A to the surface of the conductive layer, a polarizing film with an antireflection film of Comparative Example 3 having the structure of antireflection film AR10 / polarizing film P1 / conductive layer / pressure-sensitive adhesive layer A was produced. ..
  • the light from the CIE standard light source D65 is emitted from the antireflection film in a state where the pressure-sensitive adhesive layer is laminated with the non-alkali glass so as to be in direct contact with the non-alkali glass.
  • the color difference ⁇ E with the reflected light was evaluated by the above method.
  • the polarizing film with an antireflection film was cut into 50 mm squares and used.
  • the non-alkali glass EG-XG (thickness 0.7 mm) manufactured by Corning Inc. was used.
  • the black film one made of polyethylene terephthalate (PET) was used.
  • the spectral reflectance was measured using a spectrophotometer (manufactured by Konica Minolta, trade name "CM2600D").
  • the evaluation sample for evaluating the optical characteristics had a configuration of a polarizing film with an antireflection film / non-alkali glass / black PET film.
  • the reflected light was evaluated using non-alkali glass having an amorphous ITO layer (thickness 20 nm) formed on the surface. That is, in Comparative Example 1, the evaluation sample had the composition of a polarizing film with an antireflection film / ITO layer / non-alkali glass / black PET film. Sputtering was used to prepare the ITO layer. The Sn ratio of ITO contained in the ITO layer was 3% by weight. The Sn ratio was calculated from the weight of Sn atoms in ITO / (weight of Sn atoms + weight of In atoms).
  • the visual reflectance Y 1 , a 1 * value and b 1 * value of the reflected light generated when the light from the CIE standard light source D65 was incident were evaluated by the above method.
  • the same black film and spectrophotometer used for evaluating the optical characteristics of the polarizing film with antireflection film were used.
  • ⁇ Surface resistivity of adhesive layer> The surface resistivity ( ⁇ / ⁇ ) of the pressure-sensitive adhesive layers A and B was measured when the pressure-sensitive adhesive layers A or B were formed on the surface of the separator.
  • a resistivity meter (High Restor-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech Co., Ltd.) was used for measuring the surface resistivity. The measurement conditions were that the applied voltage was 250 V and the applied time was 10 seconds.
  • Example 13 the surface resistivity of the conductive layer was measured by the method specified in JIS K6911: 1995 using a resistivity meter (High Restor-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech Co., Ltd.). It was done in accordance with. The measurement conditions were that the applied voltage was 10 V and the applied time was 10 seconds.
  • Examples 1 to 12 and Comparative Example 1 the measurement of the surface resistivity of the conductive layer is specified in JIS K7194: 1994 using a resistivity meter (Lorester-GP MCP-T600 manufactured by Mitsubishi Chemical Analytech Co., Ltd.). It was done according to the method. The measurement conditions were that the applied voltage was 10 V and the applied time was 10 seconds.
  • ⁇ Surface resistivity of polarizing film> the surface resistivity of the polarizing film P1 was measured using a resistivity meter (High Restor-UP MCP-HT450 manufactured by Mitsubishi Chemical Analytech Co., Ltd.) in accordance with the method specified in JIS K6911: 1995. did. The measurement conditions were that the applied voltage was 10 V and the applied time was 10 seconds. The surface resistivity of the polarizing film P1 exceeded 1.0 ⁇ 10 14 ⁇ / ⁇ .
  • the total light transmittance T1 of the polarizing film P1 was measured using a spectrophotometer (V7100 manufactured by JASCO Corporation) in accordance with the provisions of JIS K7361-1: 1997.
  • the total light transmittance T2 of the laminate L composed of the polarizing film P1 and the conductive layer was measured at the stage where the conductive layer was formed on the surface of the polarizing film P1.
  • the total light transmittance T2 of the laminated body L was measured by incident light from the polarizing film P1 side.
  • the difference (T1-T2) between the total light transmittance T1 and the total light transmittance T2 of the polarizing film P1 was calculated, and the obtained calculated value was regarded as the loss A of the total light transmittance due to the conductive layer.
  • the polarizing films with antireflection films obtained in Examples and Comparative Examples were attached to the surface of the liquid crystal cell on the visual side to prepare a liquid crystal panel.
  • a liquid crystal cell having an amorphous ITO layer (thickness 20 nm) formed on the surface was used for Comparative Example 1. That is, in Comparative Example 1, the liquid crystal panel had a configuration of a polarizing film with an antireflection film / ITO layer / liquid crystal cell. Sputtering was used to prepare the ITO layer. The Sn ratio of ITO contained in the ITO layer was 3% by weight.
  • the liquid crystal panel of the present invention can be suitably used for applications that require good visibility, such as in-vehicle displays.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Inorganic Chemistry (AREA)
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Abstract

La présente invention concerne un panneau à cristaux liquides qui peut empêcher l'apparition de défaillances d'affichage dues à la charge électrostatique d'un dispositif d'affichage à cristaux liquides et qui peut améliorer la visibilité du dispositif d'affichage à cristaux liquides. Le panneau à cristaux liquides de la présente invention comprend : un film polarisant fixé à un film antireflet (15) qui est pourvu d'un film antireflet (10), un film polarisant (20) et une couche d'agent adhésif (30) dans cet ordre tels qu'observés dans la direction de la stratification de ces composants et qui est en outre pourvu d'une couche conductrice (40) ; et une cellule à cristaux liquides (25). Aucune couche conductrice n'est disposée entre le film polarisant fixé à un film antireflet et la cellule à cristaux liquides. La résistivité de surface de la couche conductrice qui est disposée dans le film polarisant fixé à un film antireflet, est égale ou inférieure à 1,0 × 106 Ω/□. Le film polarisant fixé à un film antireflet peut émettre une lumière réfléchie présentant une réflectance lumineuse Y égale ou inférieure à 1,1 % lorsque la lumière émise à partir d'une source de lumière de norme CIE D65 entre à partir d'une surface d'un film polarisant fixé à un film antireflet qui est situé du côté opposé à la couche d'agent adhésif tout en stratifiant la couche d'agent adhésif sur un verre sans alcali de telle sorte que la couche d'agent adhésif entre directement en contact avec le verre sans alcali.
PCT/JP2020/038059 2019-12-13 2020-10-07 Panneau à cristaux liquides WO2021117323A1 (fr)

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JP2016114906A (ja) * 2014-12-18 2016-06-23 日東電工株式会社 偏光板、及び画像表示装置
WO2018181477A1 (fr) * 2017-03-28 2018-10-04 日東電工株式会社 Panneau à cristaux liquides de type dans la cellule et dispositif d'affichage à cristaux liquides
JP2019032524A (ja) * 2017-08-08 2019-02-28 日東電工株式会社 反射防止フィルム

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WO2007004818A1 (fr) * 2005-06-30 2007-01-11 Kwang Suck Suh Film antireflet de forte dureté superficielle et à propriétés antistatiques et procédé de fabrication idoine
KR20100009472A (ko) 2008-07-18 2010-01-27 주식회사 엘지화학 액정표시장치
JP5073728B2 (ja) 2009-10-15 2012-11-14 日東電工株式会社 偏光板用保護フィルム、その製造方法および偏光板
KR20140129201A (ko) 2012-02-28 2014-11-06 헤레우스 프레셔스 메탈스 게엠베하 운트 코. 카게 편광 필터를 위한 대전방지 보호 차폐로서 전도성 고분자층
JP5812311B1 (ja) 2014-08-08 2015-11-11 ナガセケムテックス株式会社 透明導電体、液晶表示装置及び透明導電体の製造方法
KR102097797B1 (ko) 2016-12-09 2020-05-27 삼성에스디아이 주식회사 제전성 코팅층용 조성물, 이를 포함하는 편광판 및 이를 포함하는 광학표시장치
KR20230004917A (ko) * 2017-03-28 2023-01-06 닛토덴코 가부시키가이샤 점착제층을 구비한 편광 필름, 인셀형 액정 패널용 점착제층을 구비한 편광 필름, 인셀형 액정 패널 및 액정 표시 장치

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JP2005121766A (ja) * 2003-10-15 2005-05-12 Koshaku Jo 液晶ディスプレイ用の透明帯電防止トリアセチルセルロースフィルム
JP2016114906A (ja) * 2014-12-18 2016-06-23 日東電工株式会社 偏光板、及び画像表示装置
WO2018181477A1 (fr) * 2017-03-28 2018-10-04 日東電工株式会社 Panneau à cristaux liquides de type dans la cellule et dispositif d'affichage à cristaux liquides
JP2019032524A (ja) * 2017-08-08 2019-02-28 日東電工株式会社 反射防止フィルム

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