WO2022059569A1 - Film optique, plaque de polarisation circulaire et dispositif d'affichage électroluminescent organique - Google Patents

Film optique, plaque de polarisation circulaire et dispositif d'affichage électroluminescent organique Download PDF

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Publication number
WO2022059569A1
WO2022059569A1 PCT/JP2021/032939 JP2021032939W WO2022059569A1 WO 2022059569 A1 WO2022059569 A1 WO 2022059569A1 JP 2021032939 W JP2021032939 W JP 2021032939W WO 2022059569 A1 WO2022059569 A1 WO 2022059569A1
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anisotropic layer
optically anisotropic
liquid crystal
layer
group
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PCT/JP2021/032939
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English (en)
Japanese (ja)
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太朗 橋爪
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富士フイルム株式会社
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Priority to JP2022550496A priority Critical patent/JP7420956B2/ja
Priority to CN202180063195.2A priority patent/CN116324537A/zh
Priority to KR1020237008090A priority patent/KR20230045084A/ko
Publication of WO2022059569A1 publication Critical patent/WO2022059569A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • 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
    • G02B1/111—Anti-reflection coatings using layers comprising organic materials
    • 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
    • G02B5/3016—Polarising elements involving passive liquid crystal 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
    • G02B5/305—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 including organic materials, e.g. polymeric layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

  • the present invention relates to an optical film, a circular polarizing plate, and an organic electroluminescence display device.
  • the optically anisotropic layer having a refractive index anisotropy is applied to various applications such as an antireflection film for an organic electroluminescence (EL) display device and an optical compensation film for a liquid crystal display device.
  • EL organic electroluminescence
  • a polarizing plate so-called broadband polarizing plate
  • a polymerizable liquid crystal compound having a reverse wavelength dispersibility is used as the polymerizable compound used for forming the optically anisotropic layer, and further.
  • a retardation plate in which different types of optically anisotropic layers exhibiting predetermined optical characteristics are laminated is disclosed.
  • the present inventors examined a polarizing plate having an optically anisotropic layer obtained by polymerizing a polymerizable liquid crystal composition containing the compound (polymerizable liquid crystal compound) described in Patent Document 1, and found that the base was used. It was confirmed that the durability against ammonia, which is a sex-forming substance, is very weak. Hereinafter, the durability against ammonia is simply referred to as "durability". It is known that ammonia is generated from certain members and the like, and it is necessary to improve the durability.
  • an antireflection film for an organic EL display device has attracted attention as an application of an optically anisotropic layer, and when a circular polarizing plate including an optically anisotropic layer is applied to an organic EL display device, the front direction Further suppression of black tint in the oblique direction is also required.
  • An object of the present invention is to provide an optical film having excellent durability and suppressing black tint in the front direction and the oblique direction when used as a circular polarizing plate in an organic EL display device. .. Another object of the present invention is to provide a circularly polarizing plate and an organic EL display device.
  • the optically anisotropic layer (A), the optically anisotropic layer (B), and the optically anisotropic layer (C) are included, and the optically anisotropic layer (A) is a polymer film.
  • the optically anisotropic layer (B) is a layer formed by immobilizing a liquid crystal compound.
  • the optically anisotropic layer (C) is a layer formed by immobilizing a vertically oriented rod-shaped liquid crystal compound.
  • optical film according to [1] or [2], wherein the optically anisotropic layer (A) is a film containing a resin having a negative intrinsic birefringence.
  • the in-plane slow phase axis of the optically anisotropic layer (A) and the in-plane slow phase axis on the surface of the optically anisotropic layer (B) on the optically anisotropic layer (A) side are parallel.
  • the twist angle of the twist-oriented liquid crystal compound in the optically anisotropic layer (B) is within the range of 90 ⁇ 30 °.
  • the in-plane retardation of the optically anisotropic layer (A) at a wavelength of 550 nm is 140 to 220 nm.
  • the value of the product ⁇ nd of the refractive index anisotropy ⁇ n of the optically anisotropic layer (B) and the thickness d of the optically anisotropic layer (B) measured at a wavelength of 550 nm is 140 to 220 nm.
  • the in-plane retardation of the optically anisotropic layer (C) at a wavelength of 550 nm is 0 to 10 nm, and the retardation of the optically anisotropic layer (C) in the thickness direction at a wavelength of 550 nm is ⁇ 140 to ⁇ 20 nm.
  • the optically anisotropic layer (A) of the optically anisotropic layer (B) is observed.
  • the in-plane slow phase axis on the surface of the optically anisotropic layer (B) opposite to the optically anisotropic layer (A) side is clockwise with respect to the in-plane slow phase axis on the surface on the) side.
  • the in-plane slow-phase axis of the optically anisotropic layer (A) is arranged to rotate clockwise by 5 to 55 ° with respect to the absorption axis of the substituent.
  • the optically anisotropic layer (A) side of the optically anisotropic layer (B) With respect to the in-plane slow phase axis on the surface, the in-plane slow phase axis on the surface opposite to the optically anisotropic layer (A) side of the optically anisotropic layer (B) rotates counterclockwise.
  • the in-plane slow phase axis on the surface of the optically anisotropic layer (B) opposite to the optically anisotropic layer (A) side is clockwise with respect to the in-plane slow phase axis on the surface on the) side.
  • the in-plane slow-phase axis of the optically anisotropic layer (A) is arranged to rotate counterclockwise by 40 to 85 ° with respect to the absorption axis of the substituent.
  • the optically anisotropic layer (A) side of the optically anisotropic layer (B) With respect to the in-plane slow phase axis on the surface, the in-plane slow phase axis on the surface opposite to the optically anisotropic layer (A) side of the optically anisotropic layer (B) rotates counterclockwise.
  • the circle according to [6] wherein the in-plane slow-phase axis of the optically anisotropic layer (A) is arranged by rotating it clockwise by 40 to 85 ° with respect to the absorption axis of the polarizing element. Polarizer.
  • An organic electroluminescence display device having the optical film according to any one of [1] to [5] or the circular polarizing plate according to any one of [6] to [8].
  • the present invention it is possible to provide an optical film having excellent durability and suppressing black tint in the front direction and the oblique direction when used as a circular polarizing plate in an organic EL display device. Further, according to the present invention, it is possible to provide a circularly polarizing plate and an organic EL display device.
  • the slow phase axis is defined at 550 nm unless otherwise specified.
  • Re ( ⁇ ) and Rth ( ⁇ ) represent in-plane retardation at wavelength ⁇ and retardation in the thickness direction, respectively. Unless otherwise specified, the wavelength ⁇ is 550 nm.
  • the values of the average refractive index of the main optical films are exemplified below: cellulose acylate (1.48), cycloolefin polymer (1.52), polycarbonate (1.59), polymethylmethacrylate (1.49), And polystyrene (1.59).
  • light means active light or radiation, for example, the emission line spectrum of a mercury lamp, far ultraviolet rays typified by an excimer laser, extreme ultraviolet rays (EUV light: Extreme Ultraviolet), X-rays, ultraviolet rays, and the like. And electron beam (EB: Electron Beam) and the like. Of these, ultraviolet rays are preferable.
  • visible light refers to light having a diameter of 380 to 780 nm.
  • the measurement wavelength is 550 nm unless otherwise specified for the measurement wavelengths of various parameters such as the refractive index.
  • the relationship between angles includes a range of errors allowed in the technical field to which the present invention belongs. Specifically, it means that the angle is within a range of less than ⁇ 10 °, and the error from the exact angle is preferably within a range of ⁇ 5 ° or less, and within a range of ⁇ 3 ° or less. Is more preferable.
  • the vertical orientation of the rod-shaped liquid crystal compound means a state in which the long axis of the liquid crystal compound is arranged perpendicularly to the layer surface and in the same direction.
  • the term "perpendicular" does not require that the liquid crystal compound be strictly vertical, but means that the inclination angle formed by the average molecular axis of the liquid crystal compound in the layer and the surface of the layer is 70 to 90 °. ..
  • the same direction does not require that the directions are exactly the same, and when the directions of the slow phase axes are measured at arbitrary 20 positions in the plane, the slow phase axes at 20 points are measured. It is assumed that the maximum difference between the slow-phase axis directions among the two directions (the difference between the two slow-phase axis directions having the maximum difference among the 20 slow-phase axis directions) is less than 10 °. ..
  • the layer formed by fixing the liquid crystal compound is preferably a layer formed by fixing the oriented state of the oriented liquid crystal compound.
  • the "fixed" state is a state in which the orientation of the liquid crystal compound is maintained.
  • the layer has no fluidity in the temperature range of 0 to 50 ° C., usually -30 to 70 ° C. under more severe conditions, and the orientation morphology is changed by an external field or an external force. It is preferable that the state is such that the fixed orientation form can be kept stable.
  • the optically anisotropic layer (C) contained in the optical film of the present invention is preferably a layer formed by immobilizing a vertically oriented rod-shaped liquid crystal compound.
  • the layer formed by immobilizing the vertically oriented rod-shaped liquid crystal compound is preferably a positive C plate because of its usefulness as a compensating layer for a circular polarizing plate or a display device.
  • the positive C plate (positive C plate) is defined as follows.
  • the refractive index in the slow phase axial direction (the direction in which the refractive index in the plane is maximized) in the film plane is nx
  • the refractive index in the direction orthogonal to the slow phase axis in the plane in the plane is ny
  • the refraction in the thickness direction is nz
  • the positive C plate satisfies the relation of the equation (C1).
  • the positive C plate shows a negative value for Rth. Equation (C1) nz> nx ⁇ ny
  • the above-mentioned " ⁇ " includes not only the case where both are completely the same but also the case where both are substantially the same.
  • nx ⁇ ny when the absolute value of (nx-ny) x d (where d is the thickness of the film) is 0 to 10 nm, preferably 0 to 5 nm. "include.
  • the feature of the optical film of the present invention is that it includes three optically anisotropic layers (A), an optically anisotropic layer (B), and an optically anisotropic layer (C).
  • Patent Document 1 by using a polymerizable liquid crystal compound (hereinafter, also simply referred to as “specific liquid crystal compound”) in which the optically anisotropic layer exhibits reverse wavelength dispersibility, the organic EL display device is used as a circular polarizing plate. It suppressed the tinting of black color when used.
  • the polymerizable liquid crystal compound exhibiting reverse wavelength dispersibility is susceptible to decomposition by nucleophiles such as water and ammonia, and this problem tends to become remarkable particularly in the presence of ammonia, which is a basic compound.
  • the optically anisotropic layer (A) is a polymer film, and the optically anisotropic layer (B) and the optically anisotropic layer (C) are formed by using a liquid crystal compound.
  • a liquid crystal compound By doing so, high durability is achieved.
  • the optical film of the present invention is applied to an organic EL display device as a circular polarizing plate, black tinting in the front direction and the oblique direction is suppressed.
  • the optically anisotropic layer (A), the optically anisotropic layer (B) and the optically anisotropic layer (C) satisfy predetermined optical characteristics described later, the organic EL display device is used as a circular polarizing plate. When applied, black tinting in the front and diagonal directions is more suppressed.
  • FIG. 1 shows a schematic cross-sectional view of an embodiment of the optical film of the present invention.
  • the optical film 10 has an optically anisotropic layer (A) 1a, an optically anisotropic layer (B) 1b, and an optically anisotropic layer (C) 1c in this order.
  • the optically anisotropic layer (A) 1a is a polymer film, preferably a stretched polymer film (stretched film), and more preferably a stretched polymer film of a material containing a resin having a negative intrinsic birefringence. preferable. That is, it is more preferable that the stretched film contains a resin having a negative intrinsic birefringence.
  • the optically anisotropic layer (B) 1b is a layer formed by fixing a liquid crystal compound, and is preferably a layer formed by fixing a rod-shaped liquid crystal compound twist-oriented having a spiral axis in the thickness direction. Further, the optically anisotropic layer (C) 1c is a layer formed by immobilizing a vertically oriented rod-shaped liquid crystal compound.
  • the optically anisotropic layer (A) contained in the optical film of the present invention is a polymer film (film containing a polymer).
  • the resin used for the optical compensation film is classified into a resin having a positive intrinsic birefringence and a resin having a negative intrinsic birefringence, based on the difference in optical expression when stretched.
  • a resin having a positive intrinsic birefringence is a resin having a slow axis in the stretching direction.
  • a resin having a positive intrinsic birefringence is a resin in which the refractive index in the stretching direction is larger than the refractive index in the direction orthogonal to the refractive index.
  • the resin having a negative intrinsic birefringence is a resin having a slow phase axis in the direction perpendicular to the stretching direction.
  • a resin having a negative intrinsic birefringence is a resin in which the refractive index in the stretching direction is smaller than the refractive index in the direction orthogonal to the refractive index.
  • the optically anisotropic layer (A) may contain either a resin having a positive intrinsic birefringence or a resin having a negative intrinsic birefringence, and preferably contains a resin having a negative intrinsic birefringence.
  • Polymers such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate and polybutylene terephthalate; polyarylene sulfides such as polyphenyllensulfide; polyvinyl alcohol; polycarbonate; polyallylate; cellulose ester weights such as cellulose acylate, as resins with positive intrinsic compound refraction.
  • the polymer may be a homopolymer or a copolymer.
  • a polystyrene-based polymer containing a homopolymer of styrene or a styrene derivative for example, polystyrene, polystyrene fluoride
  • a copolymer of styrene or a styrene derivative and an arbitrary monomer examples include polyacrylonitrile polymers; (meth) acrylic polymers such as polymethylmethacrylate; polyester resins; or multiple copolymers thereof; and cellulose compounds such as cellulose esters.
  • polymethylmethacrylate polystyrene, polystyrene fluoride, polyvinylnaphthalene, fumaric acid ester-based resin and the like.
  • the styrene derivative includes a monomer in which one or more hydrogen atoms of the ethenyl group of styrene are substituted with a substituent and a monomer in which one or more hydrogen atoms of the phenyl group of styrene are substituted with a substituent.
  • a styrene-based monomer having a substituent on the phenyl group is preferable.
  • substituents examples include an alkyl group, a halogen atom, an alkoxy group, an acetoxy group, an amino group, a nitro group, a cyano group, an aryl group, a hydroxyl group, a carbonyl group and the like.
  • the number of substituents may be one or two or more. Further, the substituent may or may not have a substituent.
  • the styrene derivative may be one obtained by condensing a phenyl group and another aromatic ring, or may be an indene or an indane having a substituent forming a ring other than the phenyl group, and may have a crosslinked ring. It may have a structure.
  • any polymer film can be used, but a polymer film containing a resin having a negative intrinsic birefringence is preferable. Further, the polymer film may contain two or more kinds of resins. As described above, the polymer film is preferably a stretched polymer film (stretched film), and more preferably a stretched film containing a resin having a negative intrinsic birefringence.
  • the content of the resin having a negative intrinsic birefringence in the polymer film is the black tint when visually recognized from the front direction or the oblique direction of the organic EL display device to which the optical film of the present invention is applied as a circular polarizing plate. Is more suppressed (hereinafter, also simply referred to as “a point where the tinting of black color is further suppressed”), and is preferably 50 to 100% by mass, preferably 75 to 100% by mass, based on the total mass of the polymer film. Is more preferable.
  • the in-plane retardation of the optically anisotropic layer (A) at a wavelength of 550 nm is not particularly limited, but is preferably 140 to 220 nm, and more preferably 150 to 200 nm in that black tinting is further suppressed.
  • the retardation in the thickness direction of the optically anisotropic layer (A) at a wavelength of 550 nm is not particularly limited, but is preferably 140 to 180 nm and more preferably 150 to 170 nm in that the tinting of black is further suppressed.
  • the thickness of the optically anisotropic layer (A) is not particularly limited, but 20 to 50 ⁇ m is preferable, and 30 to 40 ⁇ m is more preferable, in terms of the balance between thinning and handleability.
  • the optically anisotropic layer (B) is a layer formed by immobilizing a liquid crystal compound.
  • the meaning of the "fixed" state is as described above.
  • the type of the liquid crystal compound is not particularly limited. Generally, a liquid crystal compound can be classified into a rod-shaped type (rod-shaped liquid crystal compound) and a disk-shaped type (discotic liquid crystal compound) according to its shape. Further, the liquid crystal compound can be classified into a small molecule type and a high molecular type.
  • a polymer generally refers to a molecule having a degree of polymerization of 100 or more (Polymer Physics / Phase Transition Dynamics, Masao Doi, p. 2, Iwanami Shoten, 1992).
  • any liquid crystal compound can be used, but it is preferable to use a rod-shaped liquid crystal compound.
  • Two or more kinds of rod-shaped liquid crystal compounds or a mixture of a rod-shaped liquid crystal compound and a discotic liquid crystal compound may be used.
  • the rod-shaped liquid crystal compound for example, those described in claim 1 of JP-A No. 11-513019 and paragraphs 0026 to 0098 of JP-A-2005-289980 can be preferably used.
  • the discotic liquid crystal compound for example, those described in paragraphs 0020 to 0067 of JP-A-2007-108732 and paragraphs 0013 to 0108 of JP-A-2010-244033 can be preferably used.
  • the liquid crystal compound preferably has a polymerizable group.
  • the type of the polymerizable group of the liquid crystal compound is not particularly limited, a functional group capable of an addition polymerization reaction is preferable, a polymerizable ethylenically unsaturated group or a ring-polymerizable group is more preferable, and a (meth) acryloyl group or a vinyl group is preferable. , Styryl group, or allyl group is more preferable.
  • the liquid crystal compound may be a forward wavelength dispersible liquid crystal compound or a reverse wavelength dispersible liquid crystal compound, but when the liquid crystal compound is a forward wavelength dispersible liquid crystal compound, the manufacturing cost of the optical film is high. It is preferable in that the durability is improved as well as the decrease.
  • the forward wavelength dispersible liquid crystal compound means a measured wavelength when the in-plane retardation (Re) value in the visible light range of an optically anisotropic layer produced using this liquid crystal compound is measured. The Re value decreases as the value increases.
  • the liquid crystal compound having a reverse wavelength dispersibility means a compound in which the Re value increases as the measured wavelength increases when the Re value is similarly measured.
  • the optically anisotropic layer (B) is preferably a layer in which a twist-oriented liquid crystal compound having a spiral axis in the thickness direction is fixed. It is preferably a layer in which a chiral nematic phase having a so-called spiral structure is fixed.
  • the chiral agent used for forming the torsional orientation of the liquid crystal compound various known chiral agents can be used.
  • the chiral agent has a function of inducing a helical structure of a liquid crystal compound. Since the chiral agent has a different sense or spiral pitch of the induced spiral depending on the compound, it may be selected according to the purpose.
  • the chiral agent preferably has a cinnamoyl group. Examples of chiral agents include liquid crystal device handbooks (Chapter 3, 4-3, TN, chiral agents for STN, p. 199, edited by the 142nd Committee of the Japan Society for the Promotion of Science, 1989), and JP-A-2003-287623.
  • the chiral agent generally contains an asymmetric carbon atom, but an axial asymmetric compound or a plane asymmetric compound that does not contain an asymmetric carbon atom can also be used as the chiral agent.
  • axial or asymmetric compounds include binaphthyl, helicene, paracyclophane and derivatives thereof.
  • the chiral agent may have a polymerizable group. When both the chiral agent and the liquid crystal compound have a polymerizable group, the repeating unit derived from the polymerizable liquid crystal compound and the repeating unit derived from the chiral agent are derived by the polymerization reaction between the polymerizable chiral agent and the polymerizable liquid crystal compound.
  • the polymerizable group of the polymerizable chiral agent is preferably a group of the same type as the polymerizable group of the polymerizable liquid crystal compound. Therefore, the polymerizable group of the chiral agent is preferably an unsaturated polymerizable group, an epoxy group or an aziridinyl group, more preferably an unsaturated polymerizable group, and preferably an ethylenically unsaturated polymerizable group. More preferred. Moreover, the chiral agent may be a liquid crystal compound.
  • an isosorbide derivative As the chiral agent, an isosorbide derivative, an isomannide derivative, or a binaphthyl derivative is preferable.
  • the isosorbide derivative a commercially available product such as LC-756 manufactured by BASF may be used.
  • the content of the chiral agent in the optically anisotropic layer (B) is preferably 0.01 to 200 mol%, more preferably 1 to 30 mol% with respect to the content of the liquid crystal compound.
  • the optically anisotropic layer (B) may contain a material other than the above-mentioned materials.
  • examples of other materials include surfactants, orientation control agents, and polymers used in the method for producing the optically anisotropic layer (B) described later.
  • the value of the product ⁇ nd of the refractive index anisotropy ⁇ n of the optically anisotropic layer (B) and the thickness d of the optically anisotropic layer (B) measured at a wavelength of 550 nm is not particularly limited, but is preferably 140 to 220 nm. 150 to 210 nm is more preferable, and 160 to 200 nm is further preferable, in that the tinting of black color is more suppressed.
  • the refractive index anisotropy ⁇ n means the refractive index anisotropy of the optically anisotropic layer (difference between the refractive index on the in-plane slow phase axis and the refractive index on the in-plane advancing phase axis).
  • the above ⁇ nd is measured by using an AxoScan (polarimeter) device manufactured by Axometrics and using the device analysis software of the same company.
  • the twist angle of the liquid crystal compound is 90 ⁇ 30.
  • the range of ° (within the range of 60 to 120 °) is preferable, and the range of 90 ⁇ 20 ° (within the range of 70 to 110 °) is more preferable in that the tinting of black color is more suppressed.
  • the range of 90 ⁇ 10 ° (within the range of 80 to 100 °) is more preferable.
  • the twist angle is measured by using an AxoScan (polarimeter) device manufactured by Axometrics and using the device analysis software of the same company.
  • the liquid crystal compound when the liquid crystal compound is twisted oriented, the liquid crystal compound from one main surface to the other main surface of the optically anisotropic layer (B) is twisted about the thickness direction of the optically anisotropic layer (B). Intended to be.
  • the orientation direction (in-plane slow phase axial direction) of the liquid crystal compound differs depending on the position of the optically anisotropic layer (B) in the thickness direction.
  • the thickness of the optically anisotropic layer (B) is not particularly limited, but is preferably 1.5 to 3.0 ⁇ m, more preferably 1.0 to 2.0 ⁇ m in terms of the balance between thinning and handleability.
  • the in-plane slow phase axis of the optically anisotropic layer (A) and the in-plane slow phase axis on the surface of the optically anisotropic layer (B) on the optically anisotropic layer (A) side may be parallel. preferable. Further, the in-plane slow phase axis on the surface of the optically anisotropic layer (B) on the optically anisotropic layer (A) side and the optically anisotropic layer (A) side of the optically anisotropic layer (B). It is preferable that the in-plane slow phase axis on the opposite surface has the above-mentioned twist angle (within the range of 90 ⁇ 30 °).
  • the optically anisotropic layer (C) is a layer formed by immobilizing a vertically oriented rod-shaped liquid crystal compound.
  • the rod-shaped liquid crystal compound include the rod-shaped liquid crystal compound used for forming the optically anisotropic layer (B) described above.
  • the rod-shaped liquid crystal compound a liquid crystal compound having a forward wavelength dispersibility is preferable.
  • the optically anisotropic layer (C) may contain a material other than the above-mentioned materials.
  • examples of other materials include surfactants, orientation control agents, and polymers used in the method for producing the optically anisotropic layer (C) described later.
  • the in-plane retardation of the optically anisotropic layer (C) at a wavelength of 550 nm is not particularly limited, but is preferably 0 to 10 nm, and more preferably 0 to 5 nm in that black tinting is more suppressed.
  • the retardation in the thickness direction of the optically anisotropic layer (C) at a wavelength of 550 nm is not particularly limited, but is preferably ⁇ 140 to ⁇ 20 nm, and ⁇ 130 to ⁇ 30 nm is more preferable in that black tinting is more suppressed. It is preferable, and more preferably ⁇ 120 to ⁇ 40 nm.
  • optically anisotropic layer (A), the optically anisotropic layer (B), and the optically anisotropic layer (C) are laminated in this order.
  • the optical film may further include other members.
  • the optical film may include a substrate.
  • the optically anisotropic layer (B) or the optically anisotropic layer (C) is formed, the optically anisotropic layer (B) or the optically different layer is formed on the substrate, if necessary. It is preferable to form a composition layer that can be an anisotropic layer (C).
  • a transparent substrate is preferable.
  • the transparent substrate is intended to be a substrate having a visible light transmittance of 60% or more, and the transmittance is preferably 80% or more, more preferably 90% or more.
  • the retardation value (Rth (550)) in the thickness direction at a wavelength of 550 nm of the substrate is not particularly limited, but is preferably ⁇ 110 to 110 nm, and more preferably ⁇ 80 to 80 nm.
  • the in-plane retardation value (Re (550)) at a wavelength of 550 nm of the substrate is not particularly limited, but is preferably 0 to 50 nm, more preferably 0 to 30 nm, still more preferably 0 to 10 nm.
  • the material for forming the substrate a polymer having excellent optical performance transparency, mechanical strength, thermal stability, moisture shielding property, isotropic property and the like is preferable.
  • the polymer film that can be used as a substrate include a cellulose acylate film (for example, a cellulose triacetate film (refractive index 1.48), a cellulose diacetate film, a cellulose acetate butyrate film, and a cellulose acetate propionate film).
  • Polyethylene films such as polyethylene and polypropylene, polyester films such as polyethylene terephthalate and polyethylene naphthalate, polyether sulfone films, polyacrylic films such as polymethylmethacrylate, polyurethane films, polycarbonate films, polysulfone films, polyether films, polymethyl Penten film, polyether ketone film, (meth) acrylic nitrile film, and polymer film having an alicyclic structure (Norbornen-based resin (Arton: trade name, JSR), amorphous polyolefin (Zeonex: trade name, Japan Zeon Co.
  • the substrate may contain various additives (for example, an optical anisotropy adjuster, a wavelength dispersion adjuster, fine particles, a plasticizer, an ultraviolet inhibitor, a deterioration inhibitor, a release agent, etc.).
  • additives for example, an optical anisotropy adjuster, a wavelength dispersion adjuster, fine particles, a plasticizer, an ultraviolet inhibitor, a deterioration inhibitor, a release agent, etc.
  • the thickness of the substrate is not particularly limited, but is preferably 10 to 200 ⁇ m, more preferably 10 to 100 ⁇ m, and even more preferably 20 to 90 ⁇ m.
  • the substrate may be made of a plurality of laminated sheets.
  • the substrate may be subjected to surface treatment (eg, glow discharge treatment, corona discharge treatment, ultraviolet (UV) treatment, flame treatment) on the surface of the substrate in order to improve adhesion to a layer provided on the substrate.
  • an adhesive layer undercoat layer
  • the substrate is solidified with inorganic particles having an average particle size of about 10 to 100 nm.
  • a polymer layer mixed by mass ratio of 5 to 40% by mass may be arranged on one side of the substrate.
  • the substrate may be a so-called temporary support. That is, after carrying out the production method of the present invention, the substrate may be peeled off from the optically anisotropic layer.
  • the surface of the substrate may be directly subjected to the rubbing treatment. That is, a substrate that has been subjected to a rubbing treatment may be used.
  • the direction of the rubbing treatment is not particularly limited, and the optimum direction is appropriately selected according to the direction in which the liquid crystal compound is desired to be oriented.
  • a processing method widely adopted as a liquid crystal alignment processing step of an LCD (liquid crystal display) can be applied. That is, a method of obtaining orientation by rubbing the surface of the substrate in a certain direction with paper, gauze, felt, rubber, nylon fiber, polyester fiber, or the like can be used.
  • the alignment film may be arranged on the substrate.
  • the alignment film can be a rubbing treatment of an organic compound (preferably a polymer), an oblique deposition of an inorganic compound, the formation of a layer with microgrooves, or an organic compound (eg, ⁇ -tricosan) by the Langmuir-Blojet method (LB film). It can be formed by means such as accumulation of acid (acid, dioctadecylmethylammonium chloride, methyl stearylate). Further, an alignment film in which an alignment function is generated by applying an electric field, applying a magnetic field, or irradiating with light (preferably polarized light) is also known.
  • the optical film may have an adhesive layer arranged between the layers.
  • the adhesive layer include known pressure-sensitive adhesive layers and adhesive layers.
  • the method for producing the above-mentioned optical film is not particularly limited, and a known method can be adopted.
  • an optically anisotropic layer (A) to an optically anisotropic layer (C) exhibiting predetermined optical characteristics are prepared, and the optically anisotropic layer and the support are bonded to each other as an adhesive layer (for example, an adhesive layer or an adhesive layer).
  • An optical film can be manufactured by laminating them in a predetermined order via the adhesive layer).
  • a polymerizable liquid crystal composition described later is applied onto the optically anisotropic layer (A) to form the optically anisotropic layer (B), and then the polymerizable liquid crystal is formed on the optically anisotropic layer (B).
  • the composition may be applied to form the optically anisotropic layer (C). Further, the above-mentioned method of laminating the optically anisotropic layer and the method of forming the optically anisotropic layer using the polymerizable liquid crystal composition may be combined. More specifically, the polymerizable liquid crystal composition is applied onto the substrate to form the optically anisotropic layer (C), and then the polymerizable liquid crystal composition is applied onto the optically anisotropic layer (C). Examples thereof include a method of forming an optically anisotropic layer (B) to obtain a laminated body, and then laminating the separately prepared optically anisotropic layer (A) and the laminated body to produce an optical film. .. In the following, the manufacturing method of each layer will be described in detail.
  • a stretched film can be produced by subjecting a film containing a predetermined resin to a stretching treatment.
  • the method of stretching treatment is not particularly limited, and known methods can be mentioned.
  • the optically anisotropic layer (B) and the optically anisotropic layer (C) are each formed by using a polymerizable liquid crystal composition. More specifically, a polymerizable liquid crystal composition is applied to form a composition layer, the liquid crystal compounds in the composition layer are oriented, and then a curing treatment is performed to form a predetermined optically anisotropic layer. Is preferable.
  • the polymerizable liquid crystal composition is a composition containing a liquid crystal compound having a polymerizable group. Various components contained in the polymerizable liquid crystal composition will be described in detail later. Hereinafter, the above procedure will be described in detail.
  • the procedure for forming the composition layer described above is not particularly limited, and examples thereof include a method in which a polymerizable liquid crystal composition is applied onto an object to be coated and, if necessary, a drying treatment is performed.
  • the coating method is not particularly limited, and examples thereof include a wire bar coating method, an extrusion coating method, a direct gravure coating method, a reverse gravure coating method, and a die coating method.
  • the film thickness of the composition layer is not particularly limited, but is preferably 0.1 to 20 ⁇ m, more preferably 0.2 to 15 ⁇ m, and even more preferably 0.5 to 10 ⁇ m.
  • the formed composition layer is subjected to an orientation treatment to orient the polymerizable liquid crystal compound in the composition layer.
  • the alignment treatment can be performed by drying the coating film at room temperature or by heating the coating film.
  • the liquid crystal phase formed by the orientation treatment can generally be transferred by a change in temperature or pressure.
  • a lyotropic liquid crystal compound it can also be transferred by a composition ratio such as the amount of solvent.
  • the conditions for heating the composition layer are not particularly limited, but the heating temperature is preferably 50 to 250 ° C, more preferably 50 to 150 ° C, and the heating time is preferably 10 seconds to 10 minutes.
  • the coating film may be cooled, if necessary, before the curing treatment (light irradiation treatment) described later.
  • the cooling temperature is preferably 20 to 200 ° C, more preferably 30 to 150 ° C.
  • the composition layer in which the polymerizable liquid crystal compound is oriented is subjected to a curing treatment.
  • the method of curing treatment performed on the composition layer in which the polymerizable liquid crystal compound is oriented is not particularly limited, and examples thereof include light irradiation treatment and heat treatment. Among them, the light irradiation treatment is preferable, and the ultraviolet irradiation treatment is more preferable, from the viewpoint of manufacturing aptitude.
  • the irradiation conditions of the light irradiation treatment are not particularly limited, but an irradiation amount of 50 to 1000 mJ / cm 2 is preferable.
  • the atmosphere during the light irradiation treatment is not particularly limited, but a nitrogen atmosphere is preferable.
  • composition layer may be separately formed and transferred onto a predetermined substrate.
  • the polymerizable liquid crystal composition used above includes the above-mentioned liquid crystal compound having a polymerizable group, and other components (for example, a chiral agent, a polymerization initiator, a polymerizable monomer, and a surfactant) used as needed. Activators, polymers, and solvents, etc.) are included.
  • the content of each component in the composition is preferably adjusted to be the content of each component in the composition layer described above.
  • the content of the liquid crystal compound in the polymerizable liquid crystal composition is not particularly limited, but 60% by mass or more is preferable with respect to the total solid content in the polymerizable liquid crystal composition from the viewpoint that the orientation state of the liquid crystal compound can be easily controlled. , 70% by mass or more is more preferable.
  • the upper limit is not particularly limited, but is preferably 99% by mass or less, and more preferably 97% by mass or less.
  • the solid content means a component capable of forming an optically anisotropic layer from which the solvent has been removed, and is a solid content even if the property is liquid.
  • the polymerizable liquid crystal composition may contain components other than the liquid crystal compound.
  • the polymerizable liquid crystal composition may contain a polymerization initiator.
  • the polymerization initiator include known polymerization initiators, photopolymerization initiators and thermal polymerization initiators, and photopolymerization initiators are preferable.
  • the content of the polymerization initiator in the polymerizable liquid crystal composition is not particularly limited, but is preferably 0.01 to 20% by mass, preferably 0.5 to 10% by mass, based on the total solid content in the polymerizable liquid crystal composition. Is more preferable.
  • the polymerizable liquid crystal composition may contain a photosensitizer.
  • the type of the photosensitizer is not particularly limited, and examples thereof include known photosensitizers.
  • the content of the photosensitizer in the polymerizable liquid crystal composition is not particularly limited, but is preferably 0.01 to 20% by mass, preferably 0.5 to 10% by mass, based on the total solid content in the polymerizable liquid crystal composition. % Is more preferable.
  • the polymerizable liquid crystal composition may contain a polymerizable monomer different from the liquid crystal compound having a polymerizable group.
  • the polymerizable monomer include a radically polymerizable compound and a cationically polymerizable compound, and a polyfunctional radically polymerizable monomer is preferable.
  • the polymerizable monomer include the polymerizable monomers described in paragraphs 0018 to 0020 in JP-A-2002-296423.
  • the content of the polymerizable monomer in the polymerizable liquid crystal composition is not particularly limited, but is preferably 1 to 50% by mass, more preferably 5 to 30% by mass, based on the total mass of the liquid crystal compound.
  • the polymerizable liquid crystal composition may contain a surfactant.
  • the surfactant include conventionally known compounds, but fluorine-based compounds are preferable. Specific examples thereof include the compounds described in paragraphs 0028 to 0056 of JP-A-2001-330725 and the compounds described in paragraphs 0069 to 0126 of Japanese Patent Application Laid-Open No. 2003-295212.
  • the polymerizable liquid crystal composition may contain a polymer.
  • the polymer include cellulose esters.
  • examples of the cellulose ester include those described in paragraph 0178 in JP-A-2000-155216.
  • the content of the polymer in the polymerizable liquid crystal composition is not particularly limited, but is preferably 0.1 to 10% by mass, more preferably 0.1 to 8% by mass, based on the total mass of the liquid crystal compound.
  • the polymerizable liquid crystal composition may contain an additive (orientation control agent) that promotes horizontal orientation or vertical orientation in order to bring the liquid crystal compound into a horizontal or vertical orientation state.
  • an additive orientation control agent
  • the polymerizable liquid crystal composition may contain a photo-oriented polymer.
  • the photo-oriented polymer is a polymer having a photo-oriented group.
  • the photo-oriented polymer has a repeating unit having a fluorine atom or a silicon atom represented by the formula (1) or the formula (2) described later, or when the photo-oriented polymer is a cleaved photo-oriented polymer.
  • the composition layer is formed using the polymerizable liquid crystal composition, the photo-oriented polymer tends to be unevenly distributed on the surface of the composition layer. In the optically anisotropic layer formed by using such a composition layer, the photo-alignment polymer is unevenly distributed near the surface.
  • a surface shape having a predetermined orientation-regulating force is formed. Will be done.
  • a desired optically anisotropic layer can be produced by further coating the polymerizable liquid crystal composition on the optically anisotropic layer without separately providing an alignment film.
  • the photo-oriented group of a photo-aligned polymer is a group having a photo-alignment function in which rearrangement or an eccentric chemical reaction is induced by irradiation with light having anisotropy (for example, planar polarization).
  • a photo-oriented group in which at least one of dimerization and isomerization is produced by the action of light is preferable because of its excellent orientation uniformity and good thermal stability and chemical stability.
  • the group to be quantified by the action of light include the skeleton of at least one derivative selected from the group consisting of a lauric acid derivative, a coumarin derivative, a chalcone derivative, a maleimide derivative, and a benzophenone derivative.
  • Preferred examples include a group having a group.
  • the group to be isomerized by the action of light specifically, at least one selected from the group consisting of, for example, an azobenzene compound, a stilbene compound, a spiropyran compound, a cinnamic acid compound, and a hydrazono- ⁇ -ketoester compound.
  • Preferred examples include groups having a skeleton of a species compound.
  • the cinnamoyl group because the liquid crystal orientation of the optically anisotropic layer formed on the upper layer of the optically anisotropic layer containing the photo-aligned polymer is better even with a small exposure amount, It is preferably a group selected from the group consisting of an azobenzene group, a carconyl group, and a coumarin group.
  • the photo-oriented polymer is preferably a photo-oriented polymer containing a repeating unit having a photo-oriented group and a repeating unit having a fluorine atom or a silicon atom. Further, since the liquid crystal orientation of the optically anisotropic layer formed on the upper layer of the optically anisotropic layer containing the photooriented polymer becomes better, the photooriented polymer is derived from light, heat, acid and base. It has a repeating unit A containing a cleavage group which is decomposed to form a polar group by the action of at least one selected from the group, and the repeating unit A has a cleavage group in a side chain and cleavage of the side chain.
  • the "polar group” included in the repeating unit A means a group having at least one heteroatom, and specifically, for example, a hydroxyl group, a carbonyl group, a carboxy group, an amino group, a nitro group, or an ammonium group. , And a cyano group and the like. Of these, a hydroxyl group, a carbonyl group, or a carboxy group is preferable.
  • cleaving group that produces a polar group refers to a group that produces the above-mentioned polar group by cleavage, but in the present invention, it also includes a group that reacts with an oxygen molecule after radical cleavage to generate a polar group.
  • cleavage-type photo-oriented polymer examples include the photo-oriented polymers described in paragraphs [0014] to [0049] of Patent Document 1 (International Publication No. 2018/216812), and these paragraphs. Is incorporated herein by reference.
  • the photo-oriented polymer containing a repeating unit having a fluorine atom or a silicon atom a repeating unit having a fluorine atom or a silicon atom represented by the following formula (1) or the formula (2) and a photo-orientation
  • a copolymer having a repeating unit having a sex group (hereinafter, also abbreviated as "specific copolymer") is preferably mentioned.
  • the repeating unit having a fluorine atom or a silicon atom represented by the following formula (1) or formula (2) is decomposed by at least one action selected from the group consisting of light, heat, acid and base.
  • a repeating unit containing a cleavage group that produces a polar group is decomposed by at least one action selected from the group consisting of light, heat, acid and base.
  • r and s each independently represent an integer of 1 or more.
  • RB1 and RB2 each independently represent a hydrogen atom or a substituent.
  • Y 1 and Y 2 independently represent -O- or -NR Z- , respectively.
  • R Z represents a hydrogen atom or a substituent.
  • LB1 represents a linking group having an r + 1 valence.
  • LB2 represents a linking group having an s + 1 valence.
  • B1 represents a group represented by the following formula (B1). However, when * in the following equation ( B1 ) represents a coupling position with LB1 and r is an integer of 2 or more, the plurality of B1s may be the same or different.
  • B2 represents a group represented by the following formula (B2).
  • * in the following equation ( B2 ) represents a coupling position with LB2 and s is an integer of 2 or more, the plurality of B2s may be the same or different.
  • * represents a bonding position.
  • n represents an integer of 1 or more.
  • m represents an integer of 2 or more.
  • R b1 represents a hydrogen atom or a substituent.
  • R b2 , R b3 , and R b4 independently represent a hydrogen atom or a substituent, respectively.
  • the two R b3s may be coupled to each other to form a ring, the plurality of R b2s may be the same or different from each other, and the plurality of R b3s may be the same. It may be different, and the plurality of R b4s may be the same or different from each other.
  • L b1 represents a linking group having an n + 1 valence.
  • the plurality of L b1s may be the same or different from each other.
  • L b2 represents a linking group having an m + 1 valence.
  • the plurality of L b2s may be the same or different from each other.
  • Z represents an aliphatic hydrocarbon group having a fluorine atom or an organosiloxane group.
  • the aliphatic hydrocarbon group may have an oxygen atom
  • the plurality of Zs may be the same or different from each other.
  • examples of the substituent represented by RB1 include known substituents. Of these, an alkyl group having 1 to 12 carbon atoms is preferable, and a methyl group is more preferable.
  • Y 1 independently represents -O- or -NR Z-
  • R Z represents a hydrogen atom or a substituent.
  • R Z includes known substituents, and a methyl group is preferable.
  • Y 1 preferably represents —O— or —NH—, and more preferably —O—.
  • LB1 represents a linking group having an r + 1 valence.
  • the r + 1-valent linking group is an r + 1-valent hydrocarbon group having 1 to 24 carbon atoms which may have a substituent, and a part of the carbon atoms constituting the hydrocarbon group is substituted with a heteroatom.
  • a hydrocarbon group which may be present is preferable, and an aliphatic hydrocarbon group which may contain an oxygen atom or a nitrogen atom having 1 to 10 carbon atoms is more preferable.
  • a 2- to 3-valent linking group is preferable, and a divalent linking group is more preferable.
  • r represents an integer of 1 or more.
  • an integer of 1 to 3 is preferable, an integer of 1 to 2 is more preferable, and 1 is even more preferable.
  • examples of the substituent represented by RB2 include known substituents. Of these, an alkyl group having 1 to 12 carbon atoms is preferable, and a methyl group is more preferable.
  • Y 2 represents -O- or -NR Z- .
  • R Z represents a hydrogen atom or a substituent. Examples of the substituent of R Z include known substituents, and a methyl group is preferable.
  • Y 2 preferably represents —O— or —NH—, and more preferably —O—.
  • LB2 represents a s + 1 valent linking group.
  • the s + 1-valent linking group is an s + 1-valent hydrocarbon group having 1 to 24 carbon atoms which may have a substituent, and a part of the carbon atoms constituting the hydrocarbon group is substituted with a heteroatom.
  • a hydrocarbon group which may be present is preferable, and an aliphatic hydrocarbon group which may contain an oxygen atom or a nitrogen atom having 1 to 10 carbon atoms is more preferable.
  • s + 1 valent linking group a divalent linking group is preferable.
  • s represents an integer of 1 or more.
  • an integer of 1 to 2 is preferable, and 1 is more preferable.
  • R b1 As the substituent represented by R b1 , an aliphatic hydrocarbon group having 1 to 18 carbon atoms is preferable, an alkyl group having 1 to 12 carbon atoms is more preferable, and a methyl group is further preferable.
  • R b1 is preferably a substituent.
  • R b2 in the above formula (B1) examples include known substituents, and examples thereof include the groups exemplified by the substituents of R b1 in the above formula (B1). Further, R b2 preferably represents a hydrogen atom.
  • L b1 represents an n + 1-valent linking group
  • the n + 1-valent linking group is an n + 1-valent hydrocarbon group having 1 to 24 carbon atoms which may have a substituent.
  • a hydrocarbon group in which a part of carbon atoms constituting the hydrocarbon group may be substituted with a heteroatom is preferable, and an aliphatic hydrocarbon group may contain an oxygen atom or a nitrogen atom having 1 to 10 carbon atoms. Is more preferable.
  • n + 1-valent linking group a 2- to 4-valent linking group is preferable, a 2- to 3-valent linking group is more preferable, and a divalent linking group is further preferable.
  • n represents an integer of 1 or more.
  • an integer of 1 to 5 is preferable, an integer of 1 to 3 is more preferable, and 1 is even more preferable.
  • Z represents an aliphatic hydrocarbon group having a fluorine atom or an organosiloxane group.
  • the aliphatic hydrocarbon group may have an oxygen atom, and the plurality of Zs may be the same or different from each other.
  • the aliphatic hydrocarbon group having a fluorine atom include a fluorine atom-containing alkyl group, a group in which one or more of -CH 2- constituting the fluorine atom-containing alkyl group is substituted with -O-, and a fluorine atom. Examples include contained alkenyl groups.
  • the number of carbon atoms of the aliphatic hydrocarbon group having a fluorine atom is not particularly limited, and is preferably 1 to 30, more preferably 3 to 20, and even more preferably 3 to 10.
  • the number of fluorine atoms contained in the aliphatic hydrocarbon group having a fluorine atom is not particularly limited, and is preferably 1 to 30, more preferably 5 to 25, and even more preferably 7 to 20.
  • Examples of the substituent represented by R b3 and R b4 in the above formula (B2) include known substituents, and examples thereof include the groups exemplified by the substituent represented by R b1 in the above formula (B1). Further, in R b3 , it is preferable that the two Rb 3s are bonded to each other to form a ring, and it is more preferable that the two Rb 3s are bonded to each other to form a cyclohexane ring. Further, R b4 preferably represents a hydrogen atom.
  • L b2 represents a linking group having an m + 1 valence.
  • the m + 1-valent linking group is an m + 1-valent hydrocarbon group having 1 to 24 carbon atoms which may have a substituent, and a part of the carbon atoms constituting the hydrocarbon group is substituted with a heteroatom.
  • a hydrocarbon group which may be present is preferable, and an aliphatic hydrocarbon group which may contain an oxygen atom or a nitrogen atom having 1 to 10 carbon atoms is more preferable.
  • m + 1 valent linking group a trivalent to tetravalent linking group is preferable, and a tetravalent linking group is more preferable.
  • m represents an integer of 2 or more.
  • an integer of 2 to 4 is preferable, and an integer of 2 to 3 is more preferable.
  • repeating unit including the group represented by the above formula (B1) include the repeating units represented by the following formulas B-1 to B-22, and the group represented by the above formula (B2) can be used.
  • Specific examples of the repeating unit including the repeating unit include the repeating units represented by the following formulas B-23 to B-24.
  • the content of the repeating unit having a fluorine atom or a silicon atom represented by the formula (1) or (2) in the photoorientation polymer is not particularly limited, and the photoorientation property is improved because the effect of suppressing wind unevenness is improved.
  • 70% by mass or less is further preferable, 60% by mass or less is particularly preferable, and 50% by mass or less is most preferable.
  • the structure of the main chain of the repeating unit having a photoorienting group is not particularly limited, and known structures can be mentioned.
  • (meth) acrylic, styrene, siloxane, cycloolefin, methylpentene, and amides can be mentioned.
  • a skeleton selected from the group consisting of aromatic esters are preferred.
  • a skeleton selected from the group consisting of (meth) acrylic, siloxane, and cycloolefin is more preferable, and (meth) acrylic skeleton is even more preferable.
  • repeating units having a photo-oriented group include the following.
  • the content of the repeating unit having a photo-oriented group in the photo-aligned polymer is not particularly limited, and the photo-aligned polymer has a better liquid crystal orientation in the optically anisotropic layer formed on the upper layer. It is preferably 5 to 60% by mass, more preferably 10 to 50% by mass, still more preferably 15 to 40% by mass, based on all the repeating units.
  • the specific copolymer may further have a repeating unit having a crosslinkable group in addition to the repeating unit having a group represented by the above-mentioned formula (1) and the repeating unit having a photo-oriented group.
  • the type of the crosslinkable group is not particularly limited, and examples thereof include known crosslinkable groups. Among them, an epoxy group, an epoxycyclohexyl group, an oxetanyl group, an acryloyl group, a methacryloyl group, a vinyl group, a styryl group, and an allyl group can be mentioned.
  • the structure of the main chain of the repeating unit having a crosslinkable group is not particularly limited, and known structures can be mentioned, for example, (meth) acrylic type, styrene type, siloxane type, cycloolefin type, methylpentene type, amide type, and the like.
  • a skeleton selected from the group consisting of aromatic ester-based materials is preferable.
  • a skeleton selected from the group consisting of (meth) acrylic, siloxane, and cycloolefin is more preferable, and (meth) acrylic skeleton is even more preferable.
  • repeating unit having a crosslinkable group examples include the following.
  • the content of the repeating unit having a crosslinkable group in the specific copolymer is not particularly limited, and all the repetitions of the photooriented polymer are made because the liquid crystal orientation of the optically anisotropic layer formed on the upper layer becomes better. It is preferably 10 to 60% by mass, more preferably 20 to 50% by mass, based on the unit.
  • Examples of the monomer (radical polymerizable monomer) forming other repeating units other than the above include acrylic acid ester compounds, methacrylic acid ester compounds, maleimide compounds, acrylamide compounds, acrylonitrile, maleic acid anhydrides, and styrene compounds. And vinyl compounds can be mentioned.
  • the method for synthesizing the photo-orientating polymer is not particularly limited, and for example, a monomer forming a repeating unit having a group represented by the above-mentioned formula (1), a monomer forming a repeating unit having a photo-reactive group described above, and the like. It can also be synthesized by mixing monomers forming any other repeating unit and polymerizing in an organic solvent with a radical polymerization initiator.
  • the weight average molecular weight (Mw) of the photo-oriented polymer is not particularly limited, but is preferably 25,000 or more, preferably 25,000 to 500,000, for the reason that the liquid crystal orientation of the optically anisotropic layer formed on the upper layer becomes better. Is more preferable, 25,000 to 300,000 is further preferable, and 30,000 to 150,000 is particularly preferable.
  • the weight average molecular weight of the photo-oriented polymer and the surfactant is a value measured by a gel permeation chromatograph (GPC) method under the conditions shown below.
  • the above-mentioned optical film may be used as a circular polarizing plate in combination with a polarizing element.
  • the circular polarizing plate 20 of the present invention includes a polarizing element 2 and an optical film 10.
  • the splitter 2 is arranged on the side opposite to the optically anisotropic layer (C) 1c side of the optical film 10.
  • the optically anisotropic layer (A) 1a is arranged closer to the polarizing element 20 than the optically anisotropic layer (B) 1b and the optically anisotropic layer (C) 1c. ing.
  • the splitter may be any member as long as it has a function of converting natural light into specific linear polarization, and examples thereof include an absorption type polarizing element.
  • the type of the polarizing element is not particularly limited, and a commonly used polarizing element can be used. Examples thereof include an iodine-based polarizing element, a dye-based polarizing element using a dichroic dye, and a polyene-based polarizing element.
  • Iodine-based splitters and dye-based splitters are generally produced by adsorbing iodine or a dichroic dye on polyvinyl alcohol and stretching it.
  • a protective film may be arranged on one side or both sides of the polarizing element.
  • the method for manufacturing the circularly polarizing plate is not particularly limited, and a known method can be adopted. For example, a method of adhering an optical film and a polarizing element via an adhesive layer can be mentioned.
  • the circularly polarizing plate preferably satisfies the following Requirement 1 or Requirement 2 in that the tinting of black color is more suppressed.
  • Requirement 1 When the circular polarizing plate is observed from the optically anisotropic layer (C) side toward the optically anisotropic layer (A) side, the optically anisotropic layer (A) of the optically anisotropic layer (B) is observed.
  • the in-plane slow phase axis on the surface opposite to the optically anisotropic layer (A) side of the optically anisotropic layer (B) is clockwise with reference to the in-plane slow phase axis on the surface on the side).
  • the in-plane slow-phase axis of the optically anisotropic layer (A) is arranged to rotate clockwise by 5 to 55 ° (preferably 10 to 30 °) with respect to the absorption axis of the substituent.
  • the circular polarizing plate is observed from the optically anisotropic layer (C) side toward the optically anisotropic layer (A) side, the optically anisotropic layer (A) side of the optically anisotropic layer (B) is observed.
  • the in-plane slow phase axis on the surface With respect to the in-plane slow phase axis on the surface, the in-plane slow phase axis on the surface opposite to the optically anisotropic layer (A) side of the optically anisotropic layer (B) rotates counterclockwise.
  • the in-plane slow-phase axis of the optically anisotropic layer (A) is arranged to rotate counterclockwise by 5 to 55 ° (preferably 10 to 30 °) with respect to the absorption axis of the substituent. It becomes.
  • Requirement 2 When the circular polarizing plate is observed from the optically anisotropic layer (C) side toward the optically anisotropic layer (A) side, the optically anisotropic layer (A) of the optically anisotropic layer (B) is observed.
  • the in-plane slow phase axis on the surface of the optically anisotropic layer (B) opposite to the optically anisotropic layer (A) side is clockwise with respect to the in-plane slow phase axis on the surface on the) side.
  • the in-plane slow-phase axis of the optically anisotropic layer (A) rotates counterclockwise by 40 to 85 ° (preferably 60 to 80 °) with respect to the absorption axis of the substituent.
  • the optically anisotropic layer (A) side of the optically anisotropic layer (B) is observed.
  • the in-plane slow phase axis on the surface opposite to the optically anisotropic layer (A) side of the optically anisotropic layer (B) rotates counterclockwise. If so, the in-plane slow-phase axis of the optically anisotropic layer (A) is arranged to rotate clockwise by 40 to 85 ° (preferably 60 to 80 °) with respect to the absorption axis of the substituent. Become.
  • the organic EL display device of the present invention has the above-mentioned optical film (or circular polarizing plate).
  • the circular polarizing plate is provided on the organic EL display panel of the organic EL display device. That is, the organic EL display device of the present invention has an organic EL display panel and the above-mentioned circular polarizing plate.
  • an organic EL display panel, an optical film, and a polarizing element are provided in this order.
  • the organic EL display panel is a member in which a plurality of organic compound thin films including a light emitting layer or a light emitting layer are formed between a pair of electrodes of an anode and a cathode, and is a hole injection layer, a hole transport layer, and an electron injection in addition to the light emitting layer. It may have a layer, an electron transport layer, a protective layer, and the like, and each of these layers may have other functions. Various materials can be used to form each layer.
  • Example 1> Preparation of Cellulose Achillate Film (Substrate)
  • the following composition was put into a mixing tank, stirred, and further heated at 90 ° C. for 10 minutes. Then, the obtained composition was filtered through a filter paper having an average pore diameter of 34 ⁇ m and a sintered metal filter having an average pore diameter of 10 ⁇ m to prepare a dope.
  • the solid content concentration of the dope was 23.5% by mass
  • the amount of the plasticizer added was the ratio to the cellulose acylate
  • Cellulose acylate dope ⁇ Cellulose acylate (acetyl substitution degree 2.86, viscosity average polymerization degree 310) 100 parts by mass sugar ester compound 1 (represented by chemical formula (S4)) 6.0 parts by mass sugar ester compound 2 (represented by chemical formula (S5)) 2.0 parts by mass silica particle dispersion (AEROSIL R972, Nippon Aerosil Co., Ltd.) Made) 0.1 part by mass solvent (methylene chloride / methanol / butanol) ⁇
  • the dope prepared above was cast using a drum film forming machine.
  • the dope was cast from the die so that it was in contact with the metal support cooled to 0 ° C., and then the resulting web (film) was stripped from the drum.
  • the drum was made of SUS.
  • the web (film) obtained by casting from the drum After peeling the web (film) obtained by casting from the drum, it is dried in the tenter device for 20 minutes using a tenter device that clips and conveys both ends of the web at 30 to 40 ° C. during film transfer. did. Subsequently, the web was rolled and then dried by zone heating. The resulting web was knurled and then rolled up.
  • the film thickness of the obtained cellulose acylate film was 40 ⁇ m
  • the in-plane retardation Re (550) at a wavelength of 550 nm was 1 nm
  • the thickness direction retardation Rth (550) at a wavelength of 550 nm was 26 nm.
  • optically anisotropic layer (1a) corresponding to the optically anisotropic layer (A).
  • the thickness of the optically anisotropic layer (1a) was 37 ⁇ m.
  • the in-plane retardation Re at a wavelength of 550 nm was 166.5 nm, and the thickness direction retardation Rth at a wavelength of 550 nm was -148 nm.
  • the angle of the in-plane slow phase axis of the optically anisotropic layer (1a) was 90 °, where 0 ° was taken in the stretching direction.
  • a heater (75 ° C.) was installed on the opposite side of the surface so that the distance from the film was 5 mm, and the film was dried for 2 minutes. Next, it is heated with warm air at 60 ° C. for 1 minute, and is irradiated with ultraviolet rays having an irradiation amount of 100 mJ / cm 2 using a 365 nm UV-LED while purging nitrogen so that the oxygen concentration becomes 100 volume ppm or less. did. Then, the precursor layer was formed by annealing with warm air at 120 ° C. for 1 minute.
  • the surface of the obtained precursor layer was irradiated with UV light (ultra-high pressure mercury lamp; UL750; manufactured by HOYA) 7.9 mJ / cm 2 (wavelength: 313 nm) through a wire grid polarizing element at room temperature.
  • An optically anisotropic layer (1c) having an orientation control ability was formed.
  • the film thickness of the formed optically anisotropic layer (1c) was 0.5 ⁇ m.
  • the in-plane retardation Re at a wavelength of 550 nm was 0 nm, and the thickness direction retardation Rth at a wavelength of 550 nm was ⁇ 68 nm.
  • the average inclination angle of the rod-shaped liquid crystal compound with respect to the film surface in the long axis direction was 90 °, and the rod-shaped liquid crystal compound was oriented perpendicular to the film surface.
  • the optically anisotropic layer (1c) corresponding to the optically anisotropic layer (C) was formed.
  • composition for forming an optically anisotropic layer (1c) The following rod-shaped liquid crystal compound (A) 100 parts by mass polymerizable monomer (A-400, manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) 4.0 parts by mass The following polymerization initiator S-1 (oxym type) 5.0 parts by mass The following Photoacid generator D-1 3.0 parts by mass The following polymer M-1 2.0 parts by mass The following vertical alignment agent S01 2.0 parts by mass The following photo-orientation polymer A-1 2.0 parts by mass The following Surface active agent B-1 0.2 parts by mass Methyl ethyl ketone 42.3 parts by mass Methyl isobutyl ketone 627.5 parts by mass ⁇ ⁇
  • Rod-shaped liquid crystal compound (A) (hereinafter, a mixture of compounds)
  • Photo-Oriented Polymer A-1 (The numerical values described in each repeating unit represent the content (mass%) of each repeating unit with respect to all the repeating units, and 25% by mass, 40% by mass, and 35 from the repeating unit on the left side. The weight average molecular weight was 80,000.)
  • Surfactant B-1 weight average molecular weight was 2200
  • optically anisotropic layer (1b) (Formation of optically anisotropic layer (1b)) Next, the composition for forming an optically anisotropic layer (1b) containing a rod-shaped liquid crystal compound having the following composition is coated on the optically anisotropic layer (1c) prepared above by using a Gieser coating machine, and 80 It was heated with warm air at ° C for 60 seconds. Subsequently, the obtained composition layer is irradiated with UV (500 mJ / cm 2 ) at 80 ° C. to fix the orientation of the liquid crystal compound, and the optical anisotropic layer corresponding to the optically anisotropic layer (B) is obtained. The sex layer (1b) was formed.
  • the thickness of the optically anisotropic layer (1b) was 1.2 ⁇ m, ⁇ nd at a wavelength of 550 nm was 164 nm, and the twist angle of the liquid crystal compound was 81 °.
  • the orientation axis angle of the liquid crystal compound is 14 ° on the air side, and the optically anisotropic layer (1b).
  • the side in contact with 1c) was 95 °.
  • composition for forming an optically anisotropic layer (1b) 100 parts by mass of the above rod-shaped liquid crystal compound (A) ethylene oxide-modified trimethyl propantriacrylate (V # 360, manufactured by Osaka Organic Chemical Co., Ltd.) 4 parts by mass of a photopolymerization initiator (Irgacure819, manufactured by BASF) 3 parts by mass below Left-handed torsion chiral agent (L1) 0.60 parts by mass
  • Fluorine-containing compound A (The numerical value in each repeating unit represents the content (mass%) with respect to all repeating units, the content of the repeating unit on the left side is 25% by mass, and the content of the repeating unit in the middle is 25% by mass. The content of the repeating unit on the right side was 50% by mass.)
  • the surface of the support of the cellulose triacetate film TJ25 (manufactured by FUJIFILM Corporation: thickness 25 ⁇ m) was subjected to alkali saponification treatment. Specifically, after immersing the support in a 1.5N sodium hydroxide aqueous solution at 55 ° C. for 2 minutes, the support is washed in a water washing bath at room temperature, and further, 0.1N sulfuric acid at 30 ° C. is added. Neutralized using. After neutralization, the support was washed in a water washing bath at room temperature and further dried with warm air at 100 ° C. to obtain a polarizing element protective film.
  • a roll-shaped polyvinyl alcohol (PVA) film having a thickness of 60 ⁇ m was continuously stretched in an aqueous iodine solution in the longitudinal direction and dried to obtain a polarizing element having a thickness of 13 ⁇ m.
  • the absorption axis direction and the longitudinal direction of the stator were the same.
  • the above-mentioned polarizing element protective film was bonded to one surface of the above-mentioned polarizing element using the following PVA adhesive to prepare a linear polarizing plate.
  • PVA adhesive 100 parts by mass of a polyvinyl alcohol-based resin having an acetoacetyl group (average degree of polymerization: 1200, degree of saponification: 98.5 mol%, degree of acetoacetylation: 5 mol%) and 20 parts by mass of methylol melamine at 30 ° C.
  • a PVA adhesive was prepared as an aqueous solution which was dissolved in pure water and adjusted to a solid content concentration of 3.7% by mass under the above temperature conditions.
  • the cellulose acylate film on the optically anisotropic layer (1c) side was peeled off to expose the surface of the optically anisotropic layer (1c) in contact with the cellulose acylate film.
  • a circular polarizing plate (P1) composed of an optical film (1c-1b-1a) and a linear polarizing plate was produced.
  • the polarizing element protective film, the polarizing element, the optically anisotropic layer (1a), the optically anisotropic layer (1b), and the optically anisotropic layer (1c) are laminated in this order.
  • the optically anisotropic layer (1c) containing the vertically oriented rod-shaped liquid crystal compound and the optically anisotropic layer (1h) containing the horizontally oriented reverse wavelength dispersed liquid crystal compound are directly laminated.
  • a circularly polarizing plate (C1) was produced according to the same procedure as in Example 1 except that the obtained laminate was used instead of the optical film (1c-1b-1a).
  • composition for forming an optically anisotropic layer (2a) ⁇ 100 parts by mass of the above rod-shaped liquid crystal compound (A) ethylene oxide-modified trimethylolpropane triacrylate (V # 360, manufactured by Osaka Organic Chemical Co., Ltd.) 4 parts by mass of a photopolymerization initiator (Irgacure819, manufactured by BASF) 3 parts by mass.
  • Fluorine-containing compound C 0.08 parts by mass Methyl ethyl ketone 156 parts by mass ⁇
  • the “stretched film” column means that the optically anisotropic layer is a stretched film
  • “rod-shaped liquid crystal” means that the optically anisotropic layer is a rod-shaped liquid crystal compound. It means that it is a layer formed by using the above
  • “reverse anisotropy” means that the optically anisotropic layer is a layer formed by using a liquid crystal compound having a reverse wavelength dispersibility.
  • “horizontal” means that the resin is horizontally oriented in the case of a stretched film, and the liquid crystal compound is horizontally oriented in the case of a layer formed by using a liquid crystal compound. It means that it is.
  • “Twisting” means that the liquid crystal compound is twisted oriented.
  • “Vertical” means that the liquid crystal compound is vertically oriented.
  • the optical films of the present invention are all excellent in ammonia durability, and when used as a circular polarizing plate in an organic EL display device, they are colored black in the front direction and the oblique direction. It was confirmed that it was possible to suppress.
  • the optical film of the comparative example has either inferior ammonia durability or inferior suppression of black tinting in the front direction and the oblique direction when used as a circular polarizing plate in an organic EL display device. there were.
  • Optical film 20 Circularly polarizing plate 1a Optically anisotropic layer (A) 1b Optically anisotropic layer (B) 1c Optically anisotropic layer (C) 2 Polarizer

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  • Optics & Photonics (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
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  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
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  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne : un film optique qui présente une excellente durabilité et, lorsqu'il est utilisé dans un dispositif d'affichage électroluminescent organique en tant que plaque de polarisation circulaire, inhibe la coloration noire dans la direction avant et la direction oblique ; une plaque de polarisation circulaire ; et un dispositif d'affichage électroluminescent organique. Ce film optique comprend une couche anisotrope optique (A), une couche anisotrope optique (B), et une couche anisotrope optique (C), la couche optiquement anisotrope (A) étant un film polymère, la couche anisotrope optique (B) étant une couche formée par la fixation d'un composé de cristaux liquides, la couche anisotrope optique (C) étant une couche formée par la fixation d'un composé de cristaux liquides en forme de tige orienté verticalement, et la couche anisotrope optique (A), la couche anisotrope optique (B) et la couche anisotrope optique (C) étant fournies dans cet ordre.
PCT/JP2021/032939 2020-09-18 2021-09-08 Film optique, plaque de polarisation circulaire et dispositif d'affichage électroluminescent organique WO2022059569A1 (fr)

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JP2022550496A JP7420956B2 (ja) 2020-09-18 2021-09-08 光学フィルム、円偏光板、有機エレクトロルミネッセンス表示装置
CN202180063195.2A CN116324537A (zh) 2020-09-18 2021-09-08 光学膜、圆偏振片、有机电致发光显示装置
KR1020237008090A KR20230045084A (ko) 2020-09-18 2021-09-08 광학 필름, 원편광판, 유기 일렉트로 루미네선스 표시 장치

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006251439A (ja) * 2005-03-11 2006-09-21 Nitto Denko Corp 液晶パネル、液晶テレビおよび液晶表示装置
JP2006268018A (ja) * 2005-02-25 2006-10-05 Nitto Denko Corp 偏光素子、液晶パネル、液晶テレビ、および液晶表示装置
JP2009086260A (ja) * 2007-09-28 2009-04-23 Dainippon Printing Co Ltd 位相差フィルム
JP2010091616A (ja) * 2008-10-03 2010-04-22 Nippon Zeon Co Ltd 輝度向上フィルム、複合積層体及び液晶表示装置
WO2016031881A1 (fr) * 2014-08-29 2016-03-03 富士フイルム株式会社 Procédé de production de stratifié optique, stratifié optique, plaque polarisante et dispositif d'affichage el organique
WO2019035414A1 (fr) * 2017-08-14 2019-02-21 大日本印刷株式会社 Film optique et dispositif d'affichage d'image

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018216812A1 (fr) 2017-05-26 2018-11-29 富士フイルム株式会社 Polymère de photo-alignement, composition de liant, couche de liant, stratifié optique, procédé de production de stratifié optique, et dispositif d'affichage d'image

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006268018A (ja) * 2005-02-25 2006-10-05 Nitto Denko Corp 偏光素子、液晶パネル、液晶テレビ、および液晶表示装置
JP2006251439A (ja) * 2005-03-11 2006-09-21 Nitto Denko Corp 液晶パネル、液晶テレビおよび液晶表示装置
JP2009086260A (ja) * 2007-09-28 2009-04-23 Dainippon Printing Co Ltd 位相差フィルム
JP2010091616A (ja) * 2008-10-03 2010-04-22 Nippon Zeon Co Ltd 輝度向上フィルム、複合積層体及び液晶表示装置
WO2016031881A1 (fr) * 2014-08-29 2016-03-03 富士フイルム株式会社 Procédé de production de stratifié optique, stratifié optique, plaque polarisante et dispositif d'affichage el organique
WO2019035414A1 (fr) * 2017-08-14 2019-02-21 大日本印刷株式会社 Film optique et dispositif d'affichage d'image

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CN116324537A (zh) 2023-06-23

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