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WO2011024683A1 - Film de compensation optique, plaque de polarisation et dispositif d'affichage à cristaux liquides - Google Patents

Film de compensation optique, plaque de polarisation et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2011024683A1
WO2011024683A1 PCT/JP2010/063915 JP2010063915W WO2011024683A1 WO 2011024683 A1 WO2011024683 A1 WO 2011024683A1 JP 2010063915 W JP2010063915 W JP 2010063915W WO 2011024683 A1 WO2011024683 A1 WO 2011024683A1
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WIPO (PCT)
Prior art keywords
liquid crystal
layer
optical compensation
compensation film
film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP2010/063915
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English (en)
Japanese (ja)
Inventor
山本　智弘
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Konica Minolta Opto Inc
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Konica Minolta Opto Inc
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Priority to JP2011528750A priority Critical patent/JPWO2011024683A1/ja
Publication of WO2011024683A1 publication Critical patent/WO2011024683A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/08—Cellulose derivatives
    • C08J2301/10—Esters of organic acids
    • C08J2301/12—Cellulose acetate
    • 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
    • G02F1/133633—Birefringent elements, e.g. for optical compensation using mesogenic materials

Definitions

  • the present invention relates to an optical compensation film, a polarizing plate, and a liquid crystal display device.
  • an optical film having optical compensation performance is used in order to improve optical characteristics such as viewing angle characteristics.
  • an optical compensation film an optical compensation film containing an optical anisotropic layer containing a liquid crystal compound and having the liquid crystal compound aligned is known.
  • the back coat layer is preferably applied also as an anti-blocking layer, and therefore fine particles for imparting an anti-blocking function are added to the coating composition for forming the back coat layer.
  • optical compensation film examples include those described in Patent Documents 1 to 3 below.
  • Patent Document 1 describes a coating composition useful for producing an optically anisotropic layer containing a liquid crystal compound that contributes to optical compensation of a liquid crystal display device while maintaining stable and good planar smoothness. Has been. Patent Document 1 describes that a backcoat layer is provided on the surface of the optical compensation film opposite to the optically anisotropic layer.
  • Patent Documents 2 and 3 include an optical compensation film having a functional thin film layer on one side of a transparent film substrate and a backcoat layer containing cellulose ester, fine particles and an organic solvent as constituent components on the opposite side. Are listed.
  • an optical compensation film that requires surface smoothness such as a liquid crystal coated film
  • a hard coat layer (anti-blocking layer) on the side opposite to the surface on the optically anisotropic layer side containing a liquid crystal compound is manufactured. This is an important process issue.
  • blocking sticking in a wound state, deformation
  • the transparent film base material and the optical anisotropic layer (liquid crystal layer) are deformed, and retardation unevenness (unevenness due to optical value fluctuation)
  • the object of the present invention is to solve the above-mentioned problems of the prior art, wherein an optically anisotropic layer (liquid crystal layer) is provided on one side of a transparent film substrate made of a cellulose resin film, and fine particles are provided on the other side. Retardation unevenness due to deformation of optically anisotropic layer (liquid crystal layer) containing transparent film base material and liquid crystal compound due to improvement of blocking (adhesion) for optical compensation film provided with back coat layer containing binder An optical compensation film having excellent surface smoothness (low haze), a polarizing plate using the same, and a liquid crystal display device are provided.
  • the present inventor has provided an optically anisotropic layer (liquid crystal layer) containing a liquid crystal compound on one side of a transparent film substrate made of a cellulose resin film.
  • the optical compensation film provided with a backcoat layer containing fine particles and a binder on the other side has been found to have a reduced blocking effect if the surface roughness of the region where the fine particles are not present on the backcoat layer base layer surface is small. It was. Then, when forming the backcoat layer, the surface roughness of the region where fine particles on the surface of the backcoat layer base layer are not present is determined by selecting a solvent type in the coating composition for forming the backcoat layer.
  • the thickness of the optical compensation film By controlling the thickness of the optical compensation film, it is possible to improve the blocking (adhesion) of the optical compensation film, thereby reducing retardation unevenness due to deformation of the optically anisotropic layer (liquid crystal layer) containing the transparent film substrate and the liquid crystal compound. It has been found that it can be suppressed, and the present invention has been completed.
  • an optical compensation film according to claim 1 is provided with an optically anisotropic layer containing an aligned liquid crystal compound on one side of a cellulose ester resin transparent film substrate.
  • the particle size of the fine particles contained in the back coat layer is 1 ⁇ m or less
  • the center line average roughness (Ra) of the region where fine particles are not present on the back coat layer base layer surface is in the range of 2 to 10 nm.
  • the invention according to claim 2 is the optical compensation film according to claim 1, wherein a bonding intermediate layer is provided between one side of the transparent film substrate and the optically anisotropic layer containing the liquid crystal compound. It is characterized by having.
  • the invention of claim 3 is the optical compensation film of claim 1 or 2, wherein the cellulose ester resin transparent film substrate is a cellulose acetate propionate film.
  • the invention of claim 4 is a polarizing plate having the optical compensation film according to any one of claims 1 to 3.
  • the invention of claim 5 is a liquid crystal display device having the polarizing plate of claim 4.
  • an optically anisotropic layer containing an oriented liquid crystal compound is provided on one side of a cellulose ester resin transparent film base, and the other side of the transparent film base is provided.
  • the fine particles contained in the back coat layer have a particle size of 1 ⁇ m or less, and the presence of fine particles on the surface of the back coat layer base layer.
  • the center line average roughness (Ra) of the region not to be removed is in the range of 2 to 10 nm.
  • the invention according to claim 2 is the optical compensation film according to claim 1, wherein a bonding intermediate layer is provided between one side of the transparent film substrate and the optically anisotropic layer containing the liquid crystal compound. Therefore, according to the invention of claim 2, the occurrence of defects in the bonding intermediate layer and the optically anisotropic layer can be suppressed, and the adhesion between the bonding intermediate layer and the optically anisotropic layer is sufficiently high. Furthermore, there is an effect that an optical compensation film having a sufficiently high orientation of the liquid crystal compound of the optically anisotropic layer can be obtained.
  • the cellulose ester resin transparent film substrate is preferably a cellulose acetate propionate film from the viewpoint of high transparency.
  • Invention of Claim 4 is a polarizing plate which has an optical compensation film of any one of Claim 1 to 3, According to invention of Claim 4, as a transparent protective film of a polarizing plate, optical compensation performance For example, when applied to a liquid crystal display device, a polarizing plate that can realize high image quality of the liquid crystal display device, such as widening of the viewing angle and improvement of contrast, can be obtained. .
  • the invention of claim 5 is a liquid crystal display device having the polarizing plate of claim 4, and according to the invention of claim 5, a polarizing plate comprising an optical compensation film excellent in optical compensation performance is used.
  • a high-quality liquid crystal display device with improved viewing angle, contrast, and the like can be provided.
  • optical compensation film The optical compensation film according to the present invention is provided with an optically anisotropic layer containing an oriented liquid crystal compound on one side of a cellulose ester-based resin transparent film base, and on the other side of the transparent film base.
  • An optical compensation film provided with a backcoat layer containing a resin binder and fine particles, wherein the particle size of the fine particles contained in the backcoat layer is 1 ⁇ m or less, and no fine particles are present on the surface of the backcoat layer base layer.
  • the center line average roughness (Ra) of the region is in the range of 2 to 10 nm.
  • the optical compensation film according to the present invention comprises a transparent film substrate and a functional layer formed on the transparent film substrate, and the functional layer contains an actinic radiation curable resin and a bonding intermediate layer.
  • the optically anisotropic layer containing a liquid crystal compound is laminated, and a bonding intermediate layer is present closer to the transparent film substrate than the optically anisotropic layer.
  • the optical compensation film is not limited to a functional layer composed of only a bonding intermediate layer and an optically anisotropic layer, and may include other layers.
  • an underlayer may be provided as a functional layer as a second intermediate layer interposed between the transparent film substrate and the bonding intermediate layer.
  • the base layer include those that function as an antistatic layer, an elution suppression layer, an antiglare layer, and the like.
  • a back coat layer is provided on the surface of the cellulose ester resin transparent film substrate opposite to the surface on which the optically anisotropic layer is provided.
  • the back coat layer is provided to correct curling caused by providing the active energy ray-curable resin layer and other layers, and the back coat layer is also provided as an anti-blocking layer. Fine particles are added to the layer coating composition in order to provide an anti-blocking function.
  • the particle size of the fine particles contained in the backcoat layer is 1 ⁇ m or less.
  • the particle size of the fine particles contained in the backcoat layer exceeds 1 ⁇ m, the haze of the optical compensation film is increased, the possibility of fine particles falling off is increased, and there is a concern about process contamination.
  • the center line average roughness (Ra) of the region where the fine particles are not present on the surface of the backcoat layer base layer is in the range of 2 to 10 nm.
  • the center line average roughness (Ra) of the base layer surface of the back coat layer of the optical compensation film according to the present invention is, for example, a three-dimensional surface structure analysis microscope (zygo New View) under conditions of a temperature of 23 ° C. and a humidity of 50 ⁇ 5% RH. 5000, manufactured by Canon Sales Co., Ltd.) and can be measured with an objective lens 50 times and an image zoom 1.0 times.
  • the center line average roughness (Ra) is measured for the surface of the backcoat layer base layer, which is a region portion (hereinafter referred to as a region portion where no fine particles are present) cut from the fine particle existence region portion having a peak of 50 nm or more. It is.
  • the center line average roughness (Ra) of the region where the fine particles are not present on the back coat layer base layer surface is as small as less than 2 nm, the effect of improving blocking is reduced, which is not preferable.
  • fine-particles of the backcoat layer base layer do not exist exceeds 10 nm, the surface smoothness of an optical compensation film is inferior, haze becomes high, and transparency deteriorates. Therefore, it is not preferable.
  • the inventor has developed a composition for forming a backcoat layer by mixing a solvent having a high solubility and a low solubility in various proportions with respect to the transparent film substrate component of the optical compensation film. It has been found that the target surface roughness can be obtained from the difference in the degree of swelling of the substrate by using it as a solvent for the product.
  • the transparent film substrate is not particularly limited as long as it is transparent and can be used as a substrate for an optical compensation film.
  • being transparent means that the transmittance of visible light is 60% or more, preferably 80% or more, and more preferably 90% or more.
  • Specific examples of the transparent film substrate include a resin film containing a transparent resin.
  • the transparent resin is not particularly limited as long as it can be used as the base material of the optical compensation film.
  • the transparent resin has transparency when formed into a film base material.
  • Specific examples of the transparent resin include cellulose ester resins.
  • the cellulose ester resin is not particularly limited. Specifically, for example, a carboxylic acid ester having about 2 to 22 carbon atoms is preferable, and a lower fatty acid ester having 2 to 6 carbon atoms is more preferable. Moreover, ester of aromatic carboxylic acid may be sufficient.
  • cellulose ester resin more specifically, for example, in addition to acetyl groups such as cellulose acetate propionate resin, cellulose acetate butyrate resin, and cellulose acetate propionate butyrate resin, propionate groups or Examples thereof include mixed fatty acid esters of cellulose to which butyrate groups are bonded.
  • a cellulose acetate propionate resin containing a propionate group as a substituent is particularly useful as a film for a liquid crystal image display device because of its excellent water resistance and high transparency.
  • the cellulose ester resin for example, when the substitution degree of acetyl group is X, the substitution degree of propionyl group or butyryl group is Y, and the total acyl group substitution degree is X + Y, X and Y are A cellulose ester resin having a mixed fatty acid ester of cellulose satisfying the following formulas (I) and (II) is preferable.
  • the portion not substituted with an acyl group usually exists as a hydroxyl group.
  • These cellulose ester resins can be synthesized by a known method. The method for measuring the substitution degree of the acyl group can be measured in accordance with the provisions of ASTM-D817-96.
  • the acyl group may be linear or branched, or may form a ring.
  • substitution degree of the acyl group is the same, birefringence decreases when the carbon number of the acyl group is large, and therefore an acyl group having 2 to 6 carbon atoms is preferable.
  • the butyryl group forming butyrate may be linear or branched.
  • the cellulose ester resin a single cellulose ester resin may be used, or a plurality of cellulose ester resins, for example, those having different degrees of acyl group substitution may be used in combination. .
  • a transparent film substrate having desired optical properties can be obtained.
  • the mixing ratio between the cellulose ester resin within the preferred range and the cellulose ester resin outside the preferred range is 100: 0 by mass ratio. Preferably it is ⁇ 50: 50.
  • the cellulose that is a raw material of the cellulose ester resin is not particularly limited, and examples thereof include cotton linters, wood pulp (derived from coniferous trees and hardwoods), kenaf and the like. Moreover, the cellulose ester-type resin obtained from them can be mixed and used in arbitrary ratios, respectively.
  • the acylating agent is an acid anhydride (acetic anhydride, propionic anhydride, butyric anhydride)
  • these cellulose ester resins use an organic acid such as acetic acid or an organic solvent such as methylene chloride, It can be obtained by reacting with a cellulose raw material using such a protic catalyst.
  • the number average molecular weight of the cellulose ester-based resin is preferably 60000 to 300000 from the viewpoint of strong mechanical strength when molded into an optical compensation film. Moreover, it is preferable also from the point which becomes moderate dope viscosity in a solution casting film forming method. Further, it is more preferably 70000-200000.
  • the weight average molecular weight (Mw) / number average molecular weight (Mn) is preferably in the range of 1.4 to 4.5.
  • the weight average molecular weight Mw and the number average molecular weight Mn of the cellulose ester-based resin were measured using gel permeation chromatography (GPC).
  • the cellulose ester-based resin may be used alone or in combination of two or more.
  • the cellulose ester resin can be produced by a known method. Specifically, when the acylating agent is an acid chloride (CH 3 COCl, C 2 H 5 COCl, C 3 H 7 COCl), the reaction is performed using a basic compound such as an amine as a catalyst. Is called. More specifically, it can be synthesized with reference to the method described in JP-A-10-45804.
  • the cellulose ester-based resin is obtained by adjusting the amount of the acylating agent in accordance with the degree of substitution, and the cellulose ester-based resin reacts with the hydroxyl group of the cellulose molecule.
  • Cellulose molecules are composed of many glucose units linked together, and the glucose unit has three hydroxyl groups. The number of acyl groups derived from these three hydroxyl groups is called the degree of substitution (mol%).
  • cellulose triacetate has acetyl groups bonded to all three hydroxyl groups of the glucose unit (actually 2.6 to 3.0).
  • a cellulose ester film As a cellulose ester film, what is marketed, specifically, for example, Konica Minolta Op KC8UX, KC4UX, KC5UX, KC8UCR3, KC8UCR4, KC8UCR5, KC8UY, KC4UY, KC12UR, manufactured by Konica Minolta Opto Co., Ltd.
  • the transparent film base material it is preferable to perform a surface treatment before forming the bonding intermediate layer.
  • the surface treatment is not particularly limited, and a normal method can be employed. Specific examples include glow discharge treatment, corona discharge treatment, ultraviolet treatment, flame treatment, and the like.
  • the transparent film substrate is preferably an optically biaxial film.
  • the optically biaxial film is a transparent film substrate that satisfies nx>ny> nz.
  • the optically biaxial film has a visible light transmittance of 80% or more, a film thickness of 20 to 70 ⁇ m, an in-plane retardation (Ro) determined by the following formula (1) of 20 to 330 nm, and the following formula ( The thickness direction retardation (Rt) obtained in 2) is preferably 50 to 340 nm.
  • nx represents the refractive index in the slow axis direction in the plane of the film
  • ny represents the refractive index in the direction perpendicular to the slow axis in the plane of the film
  • nz represents the thickness direction of the film.
  • Refractive index is shown
  • d shows the thickness (nm) of a film.
  • Each refractive index can be measured at a wavelength of 590 nm in an environment of a temperature of 23 ° C. and a relative humidity of 55% RH using, for example, KOBRA-21ADH manufactured by Oji Scientific Instruments.
  • a retardation increasing agent an acrylic polymer, and a sugar ester compound.
  • the retardation increasing agent is not particularly limited as long as it increases the retardation of the cellulose ester film.
  • a transparent film substrate when a transparent film substrate is produced, it may contain fine particles, a plasticizer, and an ultraviolet absorber as long as it does not inhibit the curing of the resin composition that is the raw material. Moreover, the detail about the manufacturing method of such a transparent film base material (resin film) is mentioned later.
  • the thickness of the transparent film substrate is preferably thinner in order to achieve a thinner resin film, but is preferably 20 ⁇ m or more in order to prevent breakage during production.
  • the thickness here means the average film thickness.
  • the thickness is measured at 20 to 200 locations in the width direction of the film with a contact-type film thickness meter manufactured by Mitutoyo Corporation, and the average value of the measured values is calculated. Shown as film thickness.
  • the width, physical properties, and shape of the transparent film substrate are not particularly limited and can be appropriately selected according to the purpose of the optical compensation film to be manufactured. From the viewpoint of use in a large-sized liquid crystal display device, use efficiency of a film during polarizing plate processing, and production efficiency, the thickness is preferably 1000 to 4000 mm.
  • the transparent film substrate is not particularly limited as long as it can be used as a substrate for an optical compensation film.
  • a resin film obtained by a solution casting film forming method or a melt casting film forming method can be used. If it is such a resin film, a film thickness is uniform and it can be conveniently used as a base material of an optical compensation film.
  • the cellulose ester resin transparent film substrate is preferably a cellulose acetate propionate resin film. According to such a configuration, since the transparency of the transparent film substrate is high, and the orientation of the liquid crystal compound contained in the optical anisotropic layer is high, not only the optical compensation performance is excellent, but also the transparency. In addition, a sufficiently excellent optical compensation film can be obtained.
  • the optically anisotropic layer is not particularly limited as long as it contains a liquid crystal compound, and examples thereof include an optically anisotropic layer that can exhibit predetermined optical compensation performance such as widening the viewing angle. In the optically anisotropic layer, the liquid crystal compound is preferably aligned, and the alignment property is more preferable.
  • the liquid crystal compound is not particularly limited, and examples thereof include conventionally known liquid crystal compounds contained in the optically anisotropic layer. Specifically, for example, those having a rod-like mesogen group or a disk-like mesogen group in the molecule can be mentioned. Among these, those having a rod-like mesogenic group in the molecule are preferable.
  • the liquid crystal compound is more preferably a liquid crystal compound having so-called vertical alignment, which can be vertically aligned and the alignment can be fixed. That is, the optically anisotropic layer contains, for example, a liquid crystal compound having a rod-shaped mesogenic group in the molecule, and the mesogenic group has a major axis direction substantially perpendicular to the surface direction of the transparent film substrate. It is preferable that the orientation is fixed after being oriented (vertical orientation).
  • the liquid crystal compound has a rod-shaped mesogenic group in the molecule, and the orientation is fixed after the mesogenic group is oriented so that its major axis direction is substantially perpendicular to the surface direction of the transparent film substrate. It is preferable that According to such a configuration, an optical film having better optical compensation performance can be obtained.
  • the liquid crystal compound having a rod-shaped mesogen group in the molecule may be a polymerizable liquid crystal containing a rod-shaped mesogen group and a polymerizable functional group, and at least one of the main chain and the side chain. It may be a polymer liquid crystal containing a rod-shaped mesogen group or a polymer liquid crystal containing a rod-shaped mesogen group and a polymerizable functional group.
  • the alignment can be further fixed by, for example, cooling to a temperature lower than the liquid crystal transition temperature and then polymerizing while cooling. From the point etc. which can be hardened as an adhesive layer.
  • a polymerizable liquid crystal is preferable.
  • the mesogenic group is not particularly limited, but is preferably a rod-shaped mesogenic group that can be vertically aligned. Specific examples include functional groups containing an ester group, a cyano group, an alkyl group, and an aryl group. Moreover, as a mesogenic group, the said mesogenic group may be contained 1 type, and it may contain in combination of 2 or more types.
  • the polymerizable functional group is not particularly limited, and it is preferable that polymerization can be performed while maintaining the orientation after the orientation.
  • the polymerization may be initiated by heat, or the polymerization may be initiated by irradiation with active rays such as ultraviolet rays. That is, in the case of the polymerizable liquid crystal, it may be thermosetting or actinic ray curable.
  • active rays such as ultraviolet rays.
  • the liquid crystal compound is polymerized at a temperature lower than the liquid crystal transition temperature, it is preferable that the liquid crystal compound is not heated so much that the active ray curable one is more preferable.
  • the liquid crystal compound is a polymerizable liquid crystal compound having a functional group that can be polymerized by irradiation with actinic radiation, and the immobilization step cools the coating composition for forming the optical anisotropic layer, and then the optical anisotropy.
  • the layer forming coating composition is preferably a step of irradiating an active ray to cure the optically anisotropic layer forming coating composition.
  • the polymerizable functional group examples include a vinyl group such as acryloyl group, methacryloyl group and vinyl ether, an epoxy group, and an oxetanyl group.
  • a polymerizable functional group may be used independently and may be used in combination of 2 or more type.
  • the polymerizable liquid crystal may contain one polymerizable functional group in the molecule, or may contain two or more.
  • liquid crystal compound examples include those containing a mesogenic group and those containing a mesogenic group and a polymerizable functional group. Specifically, for example, Makromol. Chem. 190, 2255 (1989), Advanced Materials, 5, 107 (1993), US Pat. No. 4,683,327, US Pat. No. 5,622,648, US Pat. No. 5,770,107, International Publication No. No.
  • R 1 and R 2 each independently represent hydrogen or a methyl group
  • X represents hydrogen, chlorine, bromine, iodine, an alkyl group having 1 to 4 carbon atoms, a methoxy group, a cyano group, or a nitro group.
  • a and b are 2 to 12.
  • R 3 represents hydrogen or a methyl group.
  • R 1 and R 2 both represent hydrogen from the viewpoint of a wide temperature range indicating a liquid crystal phase.
  • X is preferably a chlorine or methyl group.
  • a and b each represent 2 to 12, preferably 4 to 10, and more preferably 6 to 9.
  • liquid crystal compound the above liquid crystal compounds may be used alone or in combination of two or more.
  • liquid crystal compound as a commercially available product, specifically, for example, UCL018 manufactured by DIC Corporation, Paliocolor LC242 manufactured by BASF Corporation, and the like can be given.
  • the vertical alignment means that the tilt angle, which is the angle of the major axis direction of the mesogenic group (the alignment direction of the liquid crystal compound) with respect to the thickness direction of the transparent film substrate, is 70 to 90 °. 80 to 90 ° is preferable. Further, it is known that whether or not the liquid crystal compound is vertically aligned depends on the structure of the liquid crystal compound, particularly its rod-shaped mesogen group. That is, a liquid crystal compound having a vertically aligned structure can be vertically aligned by a known alignment process.
  • a coating composition (coating liquid) for forming an optically anisotropic layer containing a liquid crystal compound, which is applied on a bonding intermediate layer or the like which is a coating layer is applied to a liquid crystal.
  • a method of fixing the vertical alignment by heating the compound to a liquid crystal transition temperature or higher to cause vertical alignment and then cooling to a temperature lower than the liquid crystal transition temperature.
  • the liquid crystal transition temperature refers to a solid-liquid crystal phase transition temperature.
  • the heating up to the liquid crystal transition temperature or higher after coating the coating composition for forming an optically anisotropic layer is preferably up to the liquid crystal-isotropic liquid phase transition temperature or lower.
  • the thickness of the optically anisotropic layer is preferably 0.1 to 10 ⁇ m, and more preferably 0.2 to 5 ⁇ m.
  • the optically anisotropic layer preferably has an in-plane retardation (Ro) determined by the above formula (1) of 0 to 10 nm. Further, the thickness direction retardation (Rt) determined by the above formula (2) is preferably ⁇ 500 to ⁇ 100 nm.
  • the bonding intermediate layer is formed on the transparent film base material or on the base layer when the base layer is provided.
  • the bonding intermediate layer includes an actinic radiation curable resin. Further, the bonding intermediate layer may function as a liquid crystal alignment layer that promotes alignment of the liquid crystal compound of the optically anisotropic layer, specifically, for example, a layer subjected to rubbing treatment.
  • the actinic radiation curable resin is curable by actinic radiation such as ultraviolet rays and has transparency.
  • having transparency means that the transmittance of visible light is 60% or more, preferably 80% or more, and more preferably 90% or more.
  • Specific examples include those having a polymerizable functional group such as a vinyl group, an allyl group, an acryloyl group, a methacryloyl group, an isopropenyl group, an epoxy group, and an oxetanyl group.
  • actinic radiation curable resin what has two or more polymeric functional groups and becomes a crosslinked structure or network structure by irradiating actinic radiation is preferable.
  • the active ray is preferably ultraviolet rays from the viewpoint of workability.
  • the actinic radiation curable resin is preferably an ultraviolet curable resin.
  • the actinic radiation curable resin is preferably obtained by curing an actinic radiation curable compound.
  • the actinic radiation curable compound is more preferably at least one of a urethane acrylate oligomer and an acrylate oligomer.
  • the actinic radiation curable resin include an ultraviolet curable urethane acrylate resin, an ultraviolet curable polyester acrylate resin, an ultraviolet curable epoxy acrylate resin, an ultraviolet curable polyol acrylate resin, and an ultraviolet curable resin.
  • ultraviolet curable acrylate resins such as epoxy resins.
  • ultraviolet curable urethane acrylate resin examples include, for example, products obtained by reacting a polyester polyol with an isocyanate monomer or a prepolymer, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate (
  • acrylates include those containing methacrylates, and only those acrylates are indicated), and those that can be easily obtained by reacting an acrylate monomer having a hydroxyl group such as 2-hydroxypropyl acrylate. More specifically, examples include those described in JP-A No. 59-151110.
  • UV curable polyester acrylate resin examples include those that can be easily obtained by reacting polyester polyol with 2-hydroxyethyl acrylate or 2-hydroxy acrylate acrylate monomer. Can be mentioned. More specifically, examples include those described in JP-A-59-151112.
  • ultraviolet curable epoxy acrylate resin examples include those produced by reacting an epoxy acrylate with an oligomer, a reactive diluent and a photopolymerization initiator added thereto. More specifically, examples include those described in JP-A-1-105738.
  • ultraviolet curable polyol acrylate resins include trimethylolpropane triacrylate, ditrimethylolpropane tetraacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, and alkyl-modified dipentaerythritol. Examples include pentaacrylate.
  • the active ray curable resin includes methyl acrylate, ethyl acrylate, butyl acrylate, benzyl acrylate, cyclohexyl acrylate, ethylene glycol diacrylate, propylene glycol diacrylate, divinylbenzene, 1,4-cyclohexane diacrylate. 1,4-cyclohexyldimethyladiacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylic ester, and the like.
  • Adekaoptomer KR / BY series KR-400, KR-410, KR-550, KR-566, KR-567, BY, manufactured by ADEKA Corporation.
  • -320B KOHEI HARD A-101-KK, A-101-WS, C-302, C-401-N, C-501, M-101, M-102, T -102, D-102, NS-101, FT-102Q8, MAG-1-P20, AG-106, M-101-C, Seika Beam PHC2210 (S), PHCX-9 (manufactured by Dainichi Seika Kogyo Co., Ltd.) K-3), PHC2213, DP-10, DP-20, DP-30, P1000, P1100, P1200, P1300, P1400, P1500, P1600, CR900, manufactured by Daicel-Cytech Co., Ltd., KRM7033, KRM70
  • the thickness of the bonding intermediate layer is preferably 0.01 to 1 ⁇ m, and more preferably 0.02 to 0.7 ⁇ m. If the thickness of the bonding intermediate layer is too thin, the bonding intermediate layer has an effect such as a liquid crystal alignment layer, an antistatic layer, an elution preventing layer, an antiglare layer, or the like, and the above-described adhesion is enhanced. There is a tendency that it becomes difficult to exert the effect. Moreover, when the thickness of the joining intermediate layer is too thick, the obtained optical compensation film becomes unnecessarily thick, and there is a tendency that the thinning of the optical compensation film is hindered.
  • the actinic radiation curable resin is preferably obtained by curing an actinic radiation curable compound.
  • the actinic radiation curable compound is more preferably at least one of a urethane acrylate oligomer and an acrylate oligomer.
  • the backcoat layer is provided in the surface on the opposite side to the surface in which the optically anisotropic layer was provided of the cellulose-ester-type resin transparent film base material.
  • the back coat layer is also applied as an anti-blocking layer, and in this case, fine particles are added to the coating composition for forming the back coat layer in order to provide an anti-blocking function.
  • the back coat layer is also provided for correcting curling caused by providing the active energy ray-curable resin layer and other layers. That is, the degree of curling can be balanced by giving the optical compensation film the property of being rounded with the surface on which the backcoat layer is provided inside.
  • examples of inorganic compounds include silicon dioxide, titanium dioxide, aluminum oxide, zirconium oxide, calcium carbonate, calcium carbonate, talc, clay, calcined kaolin, calcined calcium silicate, tin oxide, Mention may be made of indium oxide, zinc oxide, ITO, hydrated calcium silicate, aluminum silicate, magnesium silicate and calcium phosphate. Fine particles containing silicon are preferable in terms of low haze, and silicon dioxide is particularly preferable.
  • These fine particles are, for example, Aerosil R972, R972V, R974, R812, 200, 200V, 300, R202, OX50, TT600 (above, manufactured by Nippon Aerosil Co., Ltd.), Seahoster KE-P10, KE-P30, KE-P50. KE-P100, KE-P150, and KE-P250 (above, manufactured by Nippon Shokubai Co., Ltd.) can be used. Among these, particularly preferred are Seahoster KE-P30, KE-P50, and KE-P100.
  • Zirconium oxide fine particles are commercially available, for example, under the trade names Aerosil R976 and R811 (manufactured by Nippon Aerosil Co., Ltd.), and can be used.
  • polymer fine particles examples include acrylic resin fine particles, silicone resin fine particles, and fluororesin fine particles.
  • the acrylic resin fine particles are commercially available under the trade names of MP-1451 (manufactured by Soken Chemical Co., Ltd.) and Riosphere RSP-3021D (manufactured by Toyo Ink Co., Ltd.), and can be used.
  • silicone resin fine particles those having a three-dimensional network structure are particularly preferable.
  • Tospearl 103, 105, 108, 120, 145, 3120 and 240 (above, manufactured by Toshiba Silicone Co., Ltd.) It is marketed under the trade name of and can be used.
  • the fine particles contained in the backcoat layer have a particle size of 1 ⁇ m or less.
  • the fine particles contained in the backcoat layer are 0.1 to 50% by mass, preferably 0.1 to 10% by mass, based on the binder.
  • the increase in haze is preferably 1% or less, more preferably 0.5% or less, and particularly preferably 0.0 to 0.1%.
  • the particle size of the fine particles contained in the backcoat layer is more preferably 400 nm or less, which is the approximate lower limit of the visible light region. This is because scattering hardly occurs when the particle diameter is optically smaller than the wavelength.
  • Examples of the resin used as the binder of the back coat layer include cellulose acetate propionate (preferably acetyl group substitution degree 1.2 to 2.3, propionyl group substitution degree 0.1 to 1.0), diacetyl cellulose, cellulose Examples thereof include, but are not limited to, cellulose ester resins such as acetate butyrate resin.
  • cellulose resins such as diacetyl cellulose, triacetyl cellulose, cellulose acetate propionate, and cellulose acetate butyrate.
  • the back coat layer is a coating for forming a back coat layer containing the fine particles, the binder, and a solvent that dissolves or swells the cellulose ester resin transparent film substrate, and a solvent that does not dissolve the film substrate.
  • the composition is performed by applying a cellulose ester resin transparent film substrate to the composition.
  • the coating composition for forming the backcoat layer it is preferable to use two kinds of mixed solvents for the coating composition for forming the backcoat layer.
  • solvent having an SP value of 9 to 10 is “solvent 1” and the solvent having an SP value of 11 to 15 is “solvent 2”, these solvents satisfy the following two conditions.
  • condition 1 Boiling point of solvent 1> Boiling point of solvent 2
  • Condition 2 Mixing ratio of solvent 1 and solvent is 8: 2 to 1: 9
  • the SP value of an organic compound is a solubility parameter, which is a numerical value of how easily it is soluble in a solvent, etc., and is synonymous with the polarity often used in organic compounds. The greater the SP value, the greater the polarity.
  • the SP value a value calculated by the Fedors method can be used.
  • a solvent satisfying the above conditions can be appropriately selected.
  • alcohol solvents such as methanol (MA), ethanol (EA), 1-propanol (NPA), isopropanol (IPA), butanol, pentanol, benzyl alcohol, diacetone alcohol (DAA), acetone, acetylacetone, methyl ethyl ketone ( MEK), methyl propyl ketone, methyl isobutyl ketone (MIBK), ketone solvents such as cyclohexanone, isophorone, methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate, amyl formate, isoamyl acetate, butyl propionate, isopropyl butyrate, ethyl butyrate Butyl butyrate, methyl lactate, ethy
  • the order of coating the backcoat layer may be before or after coating the active energy ray-curable resin layer of the cellulose ester-based resin transparent film substrate. However, if the backcoat layer also serves as an antiblocking layer, It is desirable to apply to. Alternatively, the backcoat layer can be applied in two or more steps. (Method for producing optical compensation film) Specifically, the optical compensation film according to the present invention is manufactured as follows.
  • the back coat layer since the back coat layer also serves as an anti-blocking layer, the back coat layer is first coated on one side of the cellulose ester resin transparent film substrate, and then the transparent film. It is desirable to coat an active ray curable resin layer, which is a bonding intermediate layer, on the other surface of the substrate.
  • the backcoat layer is a coating composition for forming a backcoat layer containing fine particles, a binder, a solvent that dissolves the cellulose ester-based resin transparent film substrate or a solvent that swells, and a solvent that does not dissolve the film substrate. This is done by applying the product onto the surface of the cellulose ester resin transparent film substrate.
  • the coating is preferably performed with a thickness of 1 to 100 ⁇ m, particularly preferably 5 to 30 ⁇ m.
  • the order of coating the backcoat layer may be before or after coating the active energy ray-curable resin layer of the cellulose ester-based resin transparent film substrate. However, if the backcoat layer also serves as an antiblocking layer, It is desirable to apply to. Alternatively, the backcoat layer can be applied in two or more steps.
  • an intermediate layer for bonding is formed on the transparent film substrate.
  • a coating composition for forming an intermediate layer containing an actinic radiation curable resin is applied onto a transparent film substrate.
  • the coating method is not particularly limited, and a known coating method can be used. Specific examples include a gravure coater, a spinner coater, a wire bar coater, a roll coater, a reverse coater, an extrusion coater, an air doctor coater, a die coater, a dip coater, and an ink jet method.
  • the coating thickness varies depending on the solid content concentration of the coating composition for forming an intermediate layer, but specifically, for example, a thickness such that the thickness of the formed bonding intermediate layer is within the above range.
  • the wet film thickness is preferably 0.1 to 40 ⁇ m, and more preferably 0.5 to 30 ⁇ m.
  • the dry film thickness is preferably 0.01 to 1 ⁇ m in average film thickness, and more preferably 0.02 to 0.7 ⁇ m.
  • the intermediate layer-forming coating composition coated on the transparent film substrate is irradiated with actinic rays to form a bonding intermediate layer.
  • middle layer formation apply
  • the drying method is not particularly limited as long as the organic solvent in the coating composition for forming an intermediate layer can be dried. Specific examples include air drying, heat removal, and reduced pressure removal. These may be performed alone or in combination of two or more.
  • the actinic radiation is not particularly limited as long as the intermediate layer forming coating composition can be cured, and specific examples thereof include an electron beam and ultraviolet rays. Among these, ultraviolet rays are preferable from the viewpoint of operability.
  • the coating composition for forming an intermediate layer usually contains an organic solvent in addition to the actinic radiation curable resin.
  • the organic solvent is not particularly limited as long as it can dissolve the actinic radiation curable resin.
  • hydrocarbons such as toluene and xylene
  • alcohols such as methanol, ethanol, isopropyl alcohol, butanol and cyclohexanol
  • methylene chloride dioxolane
  • propylene glycol monoalkyl ether propylene glycol monomethyl ether, etc.
  • Glycol ethers carboxylic acid esters of glycol ethers such as propylene glycol monomethyl ether acetate, esters such as ethyl acetate, methyl acetate and methyl lactate, ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone, and diacetone alcohol Ketone alcohols and the like.
  • glycol ethers such as propylene glycol monomethyl ether acetate, esters such as ethyl acetate, methyl acetate and methyl lactate, ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone, and diacetone alcohol Ketone alcohols and the like.
  • propylene glycol monoalkyl ethers having 1 to 4 carbon atoms in the alkyl group and propylene glycol monoalkyl ether acetates having 1 to 4 carbon atoms in the alkyl group are preferable.
  • these
  • the coating composition for forming the intermediate layer may contain, for example, a cellulose ester resin, a photopolymerization initiator described later, and the like in addition to the actinic radiation curable resin. More specifically, for example, the intermediate layer forming coating composition may contain a photopolymerization initiator. In the case of polymerization by irradiation with an electron beam, a photopolymerization initiator is not required. However, in the case of polymerization generally used, for example, polymerization by ultraviolet (UV) irradiation, the polymerization is promoted. Therefore, it is preferable to contain a photopolymerization initiator. By doing so, the polymerization temperature can be lowered.
  • UV ultraviolet
  • the photopolymerization initiator it is only necessary to contribute to the initiation of the curing reaction of the actinic radiation curable resin.
  • ⁇ -hydroxyketone, acetophenone, benzophenone, hydroxybenzophenone, Michler's ketone, ⁇ -amyloxime ester, thioxanthone And derivatives thereof are preferred.
  • these may be used independently and may be used in combination of 2 or more type.
  • the content of the photopolymerization initiator is preferably about 0.1 to 1 part by mass with respect to 100 parts by mass of the actinic radiation curable resin, for example.
  • any light source that generates ultraviolet rays can be used without limitation.
  • Specific examples include low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, ultrahigh-pressure mercury lamps, carbon arc lamps, metal halide lamps, and xenon lamps.
  • the irradiation conditions of ultraviolet light varies by the light source and the intermediate layer coating composition, etc., the dose of active ray is usually 5 ⁇ 500mJ / cm 2, preferably from 5 ⁇ 150mJ / cm 2.
  • irradiating active rays when irradiating active rays, it is preferably performed while applying tension in the film transport direction, more preferably while applying tension in the width direction.
  • the tension to be applied is preferably 30 to 300 N / m.
  • the method of applying tension is not particularly limited, and tension may be applied in the transport direction on the back roll, or tension may be applied in the width direction or biaxial direction by a tenter. This makes it possible to obtain a film having further excellent flatness.
  • an optically anisotropic layer is formed on the bonding intermediate layer.
  • a coating composition for forming an optically anisotropic layer containing a liquid crystal compound is applied onto the bonding intermediate layer.
  • the coating method is not particularly limited, and a known coating method can be used. Specifically, for example, spin coating method, roll coating method, printing method, dip pulling method, die coating method, casting method, bar coating method, blade coating method, spray coating method, gravure coating method, reverse coating method, and extrusion Examples thereof include a coating method.
  • the coating thickness varies depending on the solid content concentration of the coating composition for forming an optically anisotropic layer. Specifically, for example, the thickness of the formed optically anisotropic layer is within the above range.
  • the dry film thickness is preferably 0.1 to 10 ⁇ m and more preferably 0.2 to 5 ⁇ m as an average film thickness.
  • the coating composition for forming an optically anisotropic layer applied on the bonding intermediate layer is dried.
  • the drying method is not particularly limited as long as the organic solvent in the coating composition for forming an optically anisotropic layer can be dried. Specific examples include air drying, heat removal, and reduced pressure removal. These may be performed alone or in combination of two or more.
  • the liquid crystal compound is aligned by heating the coating composition for forming an optically anisotropic layer applied on the bonding intermediate layer and dried to a temperature higher than the liquid crystal transition temperature of the liquid crystal compound.
  • the alignment time takes about 1 to 10 minutes, for example.
  • the liquid crystal transition temperature refers to a solid-liquid crystal phase transition temperature.
  • the heating up to the liquid crystal transition temperature or higher after coating the coating composition for forming an optically anisotropic layer is preferably up to the liquid crystal-isotropic liquid phase transition temperature or lower.
  • the heating rate is preferably 10 to 150 ° C./second.
  • the coating composition for forming an optically anisotropic layer is cooled below the liquid crystal transition temperature of the liquid crystal compound, the orientation is fixed, and in this state, the coating composition for forming the optically anisotropic layer is irradiated with active rays. To do. By doing so, the orientation is more fixed, and an optically anisotropic layer in which the liquid crystal compound is vertically aligned is formed. That is, in this step, when the liquid crystal compound is a polymerizable liquid crystal compound having a functional group that can be polymerized by irradiation with active rays, the coating composition for forming the optical anisotropic layer is cooled, and then the optical anisotropic layer is formed. This is a step of irradiating the forming coating composition with active rays to cure the optically anisotropic layer forming coating composition. By doing so, an optically anisotropic layer can be formed easily.
  • the coating composition for forming an optically anisotropic layer usually contains an organic solvent described later in addition to the liquid crystal compound.
  • the organic solvent is not particularly limited as long as it can dissolve the liquid crystal compound. Moreover, as an organic solvent, it is preferable that it is a solvent which does not reduce the property of a transparent film base material or the intermediate
  • hydrocarbons such as benzene and toluene
  • ethers such as methoxybenzene and diethylene glycol dimethyl ether
  • ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone
  • propylene Esters such as glycol monomethyl ether acetate, ⁇ -butyrolactone
  • amide solvents such as 2-pyrrolidone, N-methyl-2-pyrrolidone, dimethylformamide, dichloromethane, carbon tetrachloride, dichloroethane, tetrachloroethane, tritrichloroethylene
  • Halogen solvent t-butyl alcohol, diacetone alcohol, glycerin, monoacetin, ethylene glycol, triethylene glycol Call, ethylene glycol monomethyl ether, alcohols such as ethyl cellosolve, phenol, phenols such as p-chlorophenol, and the like. These may be used alone or in combination of two or more.
  • organic solvents preferred as a solvent to be used alone are hydrocarbon solvents and glycol monoether acetate solvents such as ethylene glycol monomethyl ether acetate and propylene glycol monomethyl ether acetate, and are preferred as solvents to be used in combination. Is a mixed solvent using ethers or ketones in combination with glycols.
  • the solid content concentration of the coating composition for forming an optically anisotropic layer varies depending on the solubility of the liquid crystal compound, the film thickness of the optically anisotropic layer, etc., but is, for example, about 0.1 to 60% by mass. It is preferably about 3 to 40% by mass.
  • the coating composition for forming an optically anisotropic layer contains a photopolymerization initiator described later. It may be.
  • a photopolymerization initiator is not required.
  • polymerization generally used for example, polymerization by ultraviolet (UV) irradiation, the polymerization is promoted. Therefore, it is preferable to contain a photopolymerization initiator. By doing so, the polymerization temperature can be lowered, and immobilization can be suitably performed.
  • the photopolymerization initiator is not particularly limited. Specifically, for example, benzyl (bibenzoyl), benzoin isobutyl ether, benzoin isopropyl ether, benzophenone, benzoyl benzoic acid, benzoyl methyl benzoate, 4-benzoyl-4'- Methyl diphenyl sulfide, benzyl methyl ketal, dimethylaminomethyl benzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, 3,3'-dimethyl-4-methoxybenzophenone, methylobenzoylpho Mate, 2-methyl-1- (4- (methylthio) phenyl) -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butane-1- on, -(4-dodecy
  • the content of the photopolymerization initiator is preferably 0.01 to 20% by mass, more preferably 0.1 to 10% by mass, and further preferably 0.5 to 5% by mass. . If the content of the photopolymerization initiator is too small, the effect of the photopolymerization initiator tends not to be exhibited. If the content is too large, the polymerizability of the liquid crystal compound is lowered and the molecular weight is lowered, so that the scratch resistance is reduced. There is a tendency for the sex etc. to decrease.
  • the coating composition for forming an optically anisotropic layer may contain a sensitizer as long as the object of the present invention is not impaired. Although it does not specifically limit as a sensitizer, Specifically, Nippon Kayaku Co., Ltd. Kayacure DETX etc. are mentioned, for example.
  • the coating composition for forming an optically anisotropic layer may contain the following additives as long as the object of the present invention is not impaired.
  • the content of the additive is selected within a range that does not impair the object of the present invention, and is generally preferably 40% by mass or less of the coating composition for forming an optically anisotropic layer, and 20% by mass. % Or less is preferable.
  • the coating composition for forming an optically anisotropic layer containing a solvent may contain a surfactant or the like in order to facilitate coating.
  • the surfactant include cationic surfactants such as imidazoline, quaternary ammonium salts, alkylamine oxides and polyamine derivatives; polyoxyethylene-polyoxypropylene condensates, primary or Secondary alcohol ethoxylate, alkylphenol ethoxylate, polyethylene glycol and its esters, sodium lauryl sulfate, ammonium lauryl sulfate, lauryl sulfate amines, alkyl-substituted aromatic sulfonates, alkyl phosphates, aliphatic or aromatic sulfonate formalin
  • Anionic surfactants such as condensates; amphoteric surfactants such as laurylamidopropylbetaine and laurylaminoacetic acid betaine; non-polyethylene glycol fatty acid esters
  • the surfactant content varies depending on the type of surfactant, the type of liquid crystal material, the type of solvent, and the type of alignment film on which the solution is applied. Thus, it is preferably 10 ppm to 10% by mass, preferably 100 ppm to 5% by mass, and preferably 0.1 to 1% by mass.
  • the active ray is not particularly limited as long as the coating composition for forming an intermediate layer can be cured, and specific examples thereof include an electron beam and ultraviolet rays. Among these, from the viewpoint of operability, ultraviolet rays and visible light are preferable, and ultraviolet rays are more preferable. Curing with ultraviolet rays is preferable from the viewpoint that the technology is established and it is easier to use than curing with visible light.
  • the wavelength is preferably, for example, 150 to 500 nm, more preferably 250 to 450 nm, and preferably 300 to 400 nm.
  • any light source that generates ultraviolet rays can be used without limitation.
  • low-pressure mercury lamps such as sterilization lamps, fluorescent chemical lamps, and black lights
  • high-pressure discharge lamps such as high-pressure mercury lamps and metal halide lamps
  • short arc discharges such as ultra-high-pressure mercury lamps, xenon lamps, and mercury xenon lamps A lamp etc.
  • use of a metal halide lamp, a xenon lamp, a high-pressure mercury lamp, etc. is recommended.
  • the irradiation conditions of ultraviolet rays vary depending on the light source, the coating composition for forming an optically anisotropic layer, etc., but the irradiation amount of active rays is usually 5 to 500 mJ / cm 2 , preferably 5 to 150 mJ / cm 2 . is there.
  • the transparent film substrate has a long shape
  • the first coating step, the intermediate layer forming step, the second coating step, the orientation step, and the immobilization step are each performed as a transparent film.
  • the width of the transparent film substrate is preferably 1000 mm or more
  • the conveyance speed of the transparent film substrate is preferably 40 m / min or more.
  • the conveyance speed of the transparent film base material here corresponds to the coating speed of the coating composition for forming an intermediate layer and the coating composition for forming an optically anisotropic layer.
  • a coating composition for forming an intermediate layer or a coating for forming an optically anisotropic layer is used.
  • the coating unevenness of the composition occurs, and defects are likely to occur in the formed bonding intermediate layer and optically anisotropic layer.
  • the bonding intermediate layer and the optically anisotropic layer are formed. Generation of defects in the optical compensation film, the adhesion between the bonding intermediate layer and the optically anisotropic layer is sufficiently high, and the orientation of the liquid crystal compound in the optically anisotropic layer is sufficiently high. Can be manufactured.
  • the thickness of the optical compensation film according to the present invention is preferably 20 ⁇ m or more, and more preferably 20 to 80 ⁇ m.
  • the thickness here means the average film thickness.
  • the thickness is measured at 20 to 200 locations in the width direction of the film with a contact-type film thickness meter manufactured by Mitutoyo Corporation, and the average value of the measured values is calculated. Shown as film thickness.
  • the width, physical properties, and shape of the transparent film substrate are not particularly limited and can be appropriately selected according to the purpose of the optical compensation film to be manufactured. From the viewpoint of use in a large-sized liquid crystal display device, use efficiency of a film during polarizing plate processing, and production efficiency, it is preferably 1000 mm or more, and more preferably 1000 to 4000 mm.
  • the polarizing plate includes a polarizing element and a transparent protective film disposed on the surface of the polarizing element, and the transparent protective film is an optical compensation film.
  • the polarizing element is an optical element that emits light by changing the polarization of incident light to linearly polarized light.
  • an optical compensation film is attached to at least one surface of a polarizing element prepared by immersing and stretching a polyvinyl alcohol film in an iodine solution, using a completely saponified polyvinyl alcohol aqueous solution. Those combined are preferred. Further, an optical compensation film may be laminated on the other surface of the polarizing element, or a transparent protective film for another polarizing plate may be laminated.
  • the transparent protective film for the polarizing plate for example, as a commercially available cellulose ester film, KC8UX2M, KC4UX, KC5UX, KC4UY, KC8UY, KC12UR, KC8UY-HA, KC8UX-RHA, KC4FR- manufactured by Konica Minolta Opto Co., Ltd. 1, KC4HR-1, KC8UCR-3, KC8UCR-4, KC8UCR-5 and the like are preferably used.
  • resin films such as cyclic olefin resin other than a cellulose-ester film, an acrylic resin, polyester, a polycarbonate. In this case, since the saponification suitability is low, it is preferable to perform an adhesive process on the polarizing plate through an appropriate adhesive layer.
  • the polarizing plate uses an optical compensation film as a protective film laminated on at least one surface side of the polarizing element.
  • the optical compensation film works as an optical compensation film such as a retardation film
  • it is preferable that the slow axis of the optical compensation film is arranged so as to be substantially parallel or perpendicular to the absorption axis of the polarizing element.
  • polarizing element examples include, for example, a polyvinyl alcohol polarizing film.
  • Polyvinyl alcohol polarizing films include those obtained by dyeing iodine on polyvinyl alcohol films and those obtained by dyeing dichroic dyes.
  • a modified polyvinyl alcohol film modified with ethylene is preferably used as the polyvinyl alcohol film.
  • the polarizing element is obtained as follows, for example. First, a film is formed using a polyvinyl alcohol aqueous solution. The obtained polyvinyl alcohol film is uniaxially stretched and then dyed or dyed and then uniaxially stretched. And preferably, a durability treatment is performed with a boron compound.
  • the film thickness of the polarizing element is preferably 5 to 40 ⁇ m, more preferably 5 to 30 ⁇ m, and even more preferably 5 to 20 ⁇ m.
  • a cellulose ester-based optical compensation film containing a cellulose ester is laminated on the surface of the polarizing element, it is preferably bonded with a water-based adhesive mainly composed of completely saponified polyvinyl alcohol. Further, in the case of an optical compensation film other than the cellulose ester-based optical compensation film, it is preferable to perform an adhesive process on the polarizing plate through an appropriate adhesive layer.
  • the polarizing plate as described above uses the optical compensation film according to the above embodiment as a transparent protective film, so that the optical compensation film is excellent in optical compensation performance and the like, and thus a polarizing plate excellent in optical compensation performance and the like is obtained. It is done.
  • an optical compensation film excellent in optical compensation performance is applied as the transparent protective film of the polarizing plate.
  • the viewing angle is increased and the contrast is increased.
  • a polarizing plate capable of realizing high image quality of the liquid crystal display device such as improvement can be obtained.
  • the liquid crystal display device includes a liquid crystal cell and two polarizing plates arranged so as to sandwich the liquid crystal cell.
  • the liquid crystal cell is a cell in which a liquid crystal substance is filled between a pair of electrodes, and by applying a voltage to the electrodes, the alignment state of the liquid crystal is changed and the amount of transmitted light is controlled. Since such a liquid crystal display device uses a polarizing plate excellent in optical compensation performance and the like, optical characteristics such as viewing angle characteristics of the liquid crystal display device can be improved. Therefore, high definition of the liquid crystal display device can be realized.
  • the liquid crystal display device include a reflective type, a transmissive type, and a transflective type, and also include a TN type, an STN type, an OCB type, a HAN type, and a VA type (PVA type). , MVA type), IPS type and the like.
  • the polarizing plate provided with the optical compensation film according to the present embodiment is suitably used in the IPS liquid crystal display device.
  • IPS In-Plane-Switching
  • a liquid crystal display device can be manufactured.
  • the IPS mode includes a fringe electric field switching (FFS) mode, and similarly to the IPS mode, a polarizing plate including the optical compensation film according to the present embodiment can be incorporated, and similar effects can be obtained.
  • a liquid crystal display device having can be manufactured.
  • the liquid crystal layer of the liquid crystal panel in the IPS mode type liquid crystal display device is homogeneously aligned in parallel with the substrate surface in the initial state, and the director of the liquid crystal layer in the plane parallel to the substrate is parallel to the electrode wiring direction when no voltage is applied. Or somewhat have an angle. Then, the direction of the director of the liquid crystal layer when a voltage is applied shifts in a direction perpendicular to the electrode wiring direction with the application of the voltage, and the director direction of the liquid crystal layer is compared to the direction of the director when no voltage is applied.
  • the liquid crystal layer when the voltage is applied rotates the azimuth angle of the polarization by 90 ° like a half-wave plate, and the transmission axis of the output side polarizing plate and the azimuth angle of the polarization Match and the display is white.
  • the thickness of the liquid crystal layer is constant, but since it is driven by a lateral electric field, it may be possible to increase the response speed with respect to switching by slightly increasing the thickness of the liquid crystal layer.
  • a polarizing plate provided with a film, the effect can be maximized even when the thickness of the liquid crystal layer is not constant.
  • the thickness is preferably 2 to 6 ⁇ m, more preferably 3 to 5.5 ⁇ m. By doing so, a liquid crystal layer that can effectively exhibit excellent performance is obtained.
  • a polarizing plate having an optical compensation film excellent in optical compensation performance is used, it is possible to provide a high-quality liquid crystal display device with an improved viewing angle and contrast.
  • Example 1 As the transparent cellulose ester-based resin film substrate, a cellulose acetate propionate film (CAP, trade name KC-4KR, manufactured by Konica Minolta Opto) was used.
  • the resin film had a thickness of 60 ⁇ m and a width of 1.5 m.
  • the film thickness of the back coat layer was 0.2 ⁇ m.
  • (Coating composition for forming intermediate layer for bonding) 13 parts by mass of urethane acrylate oligomer (UV-7510B Nippon Synthetic Chemical Co., Ltd.)) Propylene glycol monomethyl ether 290 parts by mass Isopropyl alcohol 685 parts by mass Photopolymerization initiator 0.05 parts by mass (Lucirin TPO (manufactured by BASF Corporation)
  • the intermediate layer-forming coating composition is applied to the other side of the cellulose acetate propionate film with a wire bar (# 3), dried at a temperature of 80 ° C.
  • the thickness of the bonding intermediate layer after drying was 0.5 ⁇ m.
  • (Coating composition for forming a polymerizable liquid crystal layer) 25 parts by mass of UV-polymerizable liquid crystal material (UCL018 manufactured by Dainippon Ink & Chemicals, Inc.) Propylene glycol monomethyl ether acetate 80 parts by mass Photopolymerization initiator 0.04 parts by mass (Lucirin TPO, manufactured by Bassf Corporation) 0.02 parts by mass of hindered amine (LS-765, manufactured by Sankyo Lifetech Co., Ltd.)
  • the above-mentioned coating composition for forming a polymerizable liquid crystal layer was applied to the surface of the above-mentioned bonding intermediate layer with a thickness of 12 ⁇ m by a die coater.
  • the rod-shaped liquid crystal compound was orientated, and the optically anisotropic layer containing a liquid crystal compound was formed.
  • the film thickness of the optically anisotropic layer was 2 ⁇ m.
  • the center line average roughness (Ra) of the base layer surface of the back coat layer of the optical compensation film obtained in this Example 1 in this way was analyzed under a condition of a temperature of 23 ° C. and a humidity of 50 ⁇ 5% RH. Using a microscope (zygo New View 5000, manufactured by Canon Sales Co., Ltd.), measurement was performed with an objective lens of 50 times and an image zoom of 1.0 times.
  • Example 2 Although it carries out similarly to the case of the said Example 1, a different point from the case of the said Example 1 is a solvent 1: methyl ethyl ketone (MEK, boiling point: 80 degreeC, SP value) as a solvent of the coating composition for backcoat layer formation. 9.3) 10 parts by mass, and solvent 2: methanol (MeOH, boiling point: 64.6 ° C., SP value: 14.5) 90 parts by mass, as shown in Table 2 below, in a ratio of 10:90 It is in the point used in.
  • MEK methyl ethyl ketone
  • Example 3 Although it carries out similarly to the case of the said Example 1, the point different from the case of the said Example 1 is a solvent 1: ethyl acetate (boiling point: 78 degreeC, SP value :) as a solvent of the coating composition for backcoat layer formation. 8.9) 30 parts by mass and solvent 2: 70 parts by mass of methanol (MeOH, boiling point: 64.6 ° C., SP value: 14.5) at a ratio of 30:70 as shown in Table 2 below. It is in the point used.
  • solvent 1 ethyl acetate
  • solvent 2 70 parts by mass of methanol (MeOH, boiling point: 64.6 ° C., SP value: 14.5) at a ratio of 30:70 as shown in Table 2 below. It is in the point used.
  • Example 4 The same procedure as in Example 1 is performed except that the fine particle of the backcoat layer forming coating composition is a 2% isopropyl alcohol dispersion of silica fine particles (Seahoster KE-P10). , Manufactured by Nippon Shokubai Co., Ltd., average particle diameter: 100 nm), 0.8 parts by mass.
  • the fine particle of the backcoat layer forming coating composition is a 2% isopropyl alcohol dispersion of silica fine particles (Seahoster KE-P10). , Manufactured by Nippon Shokubai Co., Ltd., average particle diameter: 100 nm), 0.8 parts by mass.
  • Example 5 The same procedure as in Example 1 is carried out, but the difference from Example 1 is that a 2% isopropyl alcohol dispersion of silica fine particles (Seahoster KE-P100) is used as the fine particles of the coating composition for backcoat layer formation. , Manufactured by Nippon Shokubai Co., Ltd., average particle size: 1000 nm), 0.8 parts by mass.
  • Example 6 The same procedure as in Example 1 is carried out, but the difference from Example 1 is that a 2% isopropyl alcohol dispersion (RSP-3021D, acrylic fine particles) is used as the fine particles of the coating composition for forming the backcoat layer. This is in that 0.8 parts by mass of Toyo Ink Co., Ltd.
  • Example 7 Although it carries out similarly to the case of the said Example 1, a different point from the case of the said Example 1 is a cellulose triacetate film (TAC, brand name KC4UYW, the Konica Minolta Opto company make) as a transparent cellulose-ester-type resin film base material. ) Is used. The resin film had a thickness of 60 ⁇ m and a width of 1.5 m. Comparative Example 1 For comparison, it was carried out with the solvent of the coating composition for backcoat layer formation being different from that in Example 1 above.
  • TAC cellulose triacetate film
  • KC4UYW the Konica Minolta Opto company make
  • solvent 1 propylene glycol monomethyl ether acetate (PGMEA, boiling point: 146 ° C., SP value: 9.6) 5 parts by mass
  • solvent 2 isopropyl alcohol (IPA, Boiling point: 82.4 ° C., SP value: 11.5)
  • IPA isopropyl alcohol
  • solvent 1 cyclohexanone (boiling point: 155 ° C., SP value: 9.6) 90 parts by mass
  • solvent 2 normal propyl alcohol (NPA, boiling point: 97 ° C., SP value: 12) As shown in Table 2 below, 10 parts by mass is used at a ratio of 90:10.
  • each optical compensation film sample was overlaid under a high humidity condition of a temperature of 50 ° C. and a humidity of 90% RH, and a load of 200 g was obtained. After performing the durability treatment for 3 hours, the retardation unevenness was visually evaluated for each sample under the crossed Nicol condition according to the above criteria. The obtained results are shown in Table 3 below.
  • each optical compensation film sample was overlaid under a high humidity condition of a temperature of 50 ° C. and a humidity of 90% RH, and a load of 200 g was obtained. After performing durability treatment for 3 hours, the sticking (blocking property) was visually evaluated for each sample under crossed Nicol conditions according to the above criteria. The obtained results are shown in Table 3 below.
  • the optical compensation films obtained in Examples 1 to 7 of the present invention have a center line average roughness (Ra) in a region where no fine particles exist on the backcoat layer base layer surface.
  • Ra center line average roughness
  • the optical compensation film includes an optical film including a transparent film substrate and a liquid crystal compound. It was possible to suppress retardation unevenness due to deformation of the isotropic layer (liquid crystal layer) and to have excellent surface smoothness (low haze).
  • the optical compensation film obtained in Comparative Example 1 has a low haze because the center line average roughness (Ra) in the region where the fine particles on the backcoat layer base layer surface are not present is small.
  • the retardation unevenness due to the deformation of the optically anisotropic layer (liquid crystal layer), particularly the retardation unevenness after the durability treatment cannot be suppressed.
  • the optical compensation film obtained in Comparative Example 2 had a very high haze value because the center line average roughness (Ra) in the region where fine particles on the backcoat layer base layer surface were not present was large. .
  • the optical compensation film obtained in Comparative Example 3 has a very large average particle size of the fine particles contained in the backcoat layer, it has a very high haze value. A satisfactory level was not obtained.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Polarising Elements (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne : un film de compensation optique dans lequel le blocage (l'adhérence) est amélioré(e) pour empêcher l'irrégularité de retard provoquée par la déformation d'un matériau de base de film transparent et d'une couche anisotrope optique contenant un composé cristallin liquide (une couche de cristaux liquides) et qui présente un excellent lissé de surface (faible diffusion atmosphérique) ; et une plaque de polarisation et un dispositif d'affichage à cristaux liquides, chacun étant équipé du film de compensation optique. Dans le film de compensation optique, une couche anisotrope optique contenant un composé cristallin liquide orienté est prévue sur une surface d'un matériau de base de film transparent en résine d'ester de cellulose et une couche de revêtement arrière comprenant un liant de résine d'ester de cellulose et des microparticules est prévue sur l'autre surface du matériau de base transparent, les microparticules contenues dans la couche de revêtement arrière ayant des diamètres de particules inférieurs ou égaux à 1 μm et la rugosité moyenne de la ligne médiane (Ra) d'une zone sur la surface de la couche de base de la couche de revêtement arrière dans laquelle les microparticules ne sont pas présentes allant de 2 à 10 nm.
PCT/JP2010/063915 2009-08-31 2010-08-18 Film de compensation optique, plaque de polarisation et dispositif d'affichage à cristaux liquides Ceased WO2011024683A1 (fr)

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JP2014199359A (ja) * 2013-03-29 2014-10-23 富士フイルム株式会社 ３ｄ画像表示装置用光学フィルムおよびその製造方法、偏光板、３ｄ画像表示装置
JP2015215596A (ja) * 2014-04-23 2015-12-03 大日本印刷株式会社 光学フィルム用転写体、光学フィルム及び画像表示装置
JP2016085424A (ja) * 2014-10-29 2016-05-19 富士フイルム株式会社 光学フィルム、偏光板、画像表示装置、および、光学フィルムの製造方法
JPWO2014168260A1 (ja) * 2013-04-11 2017-02-16 住友化学株式会社 光学異方層形成用組成物
JP2017049392A (ja) * 2015-09-01 2017-03-09 大日本印刷株式会社 光学フィルム用転写体、光学フィルム及び画像表示装置
US9664833B2 (en) 2014-01-31 2017-05-30 Sumitomo Chemical Company, Limited Optically anisotropic sheet for transfer
US9784894B2 (en) 2014-01-31 2017-10-10 Sumitomo Chemical Company, Limited Optically anisotropic sheet
WO2018198425A1 (fr) * 2017-04-24 2018-11-01 日東電工株式会社 Film de cristaux liquides à alignement homéotrope et procédé de fabrication d'un tel film de cristaux liquides à alignement homéotrope
JP2021184046A (ja) * 2020-05-22 2021-12-02 大日本印刷株式会社 光学積層体、位相差フィルム、転写体、光学部材、表示装置、および光学部材の製造方法

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JP2008150489A (ja) * 2006-12-18 2008-07-03 Fujifilm Corp 液晶組成物、並びにそれを用いた位相差板、楕円偏光板及び液晶表示装置

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JP2005300576A (ja) * 2004-04-06 2005-10-27 Konica Minolta Opto Inc 防眩性反射防止フィルム、偏光板及び表示装置
JP2008150489A (ja) * 2006-12-18 2008-07-03 Fujifilm Corp 液晶組成物、並びにそれを用いた位相差板、楕円偏光板及び液晶表示装置

Cited By (14)

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Publication number Priority date Publication date Assignee Title
JP2014199359A (ja) * 2013-03-29 2014-10-23 富士フイルム株式会社 ３ｄ画像表示装置用光学フィルムおよびその製造方法、偏光板、３ｄ画像表示装置
JPWO2014168260A1 (ja) * 2013-04-11 2017-02-16 住友化学株式会社 光学異方層形成用組成物
US9784894B2 (en) 2014-01-31 2017-10-10 Sumitomo Chemical Company, Limited Optically anisotropic sheet
US9664833B2 (en) 2014-01-31 2017-05-30 Sumitomo Chemical Company, Limited Optically anisotropic sheet for transfer
JP2015215596A (ja) * 2014-04-23 2015-12-03 大日本印刷株式会社 光学フィルム用転写体、光学フィルム及び画像表示装置
JP2016085424A (ja) * 2014-10-29 2016-05-19 富士フイルム株式会社 光学フィルム、偏光板、画像表示装置、および、光学フィルムの製造方法
JP2017049392A (ja) * 2015-09-01 2017-03-09 大日本印刷株式会社 光学フィルム用転写体、光学フィルム及び画像表示装置
WO2018198425A1 (fr) * 2017-04-24 2018-11-01 日東電工株式会社 Film de cristaux liquides à alignement homéotrope et procédé de fabrication d'un tel film de cristaux liquides à alignement homéotrope
JP2018185375A (ja) * 2017-04-24 2018-11-22 日東電工株式会社 ホメオトロピック配向液晶フィルムの製造方法
TWI645020B (zh) * 2017-04-24 2018-12-21 日商日東電工股份有限公司 垂直配向液晶膜之製造方法
CN109416429A (zh) * 2017-04-24 2019-03-01 日东电工株式会社 垂直取向液晶膜及其制造方法
CN109416429B (zh) * 2017-04-24 2019-12-31 日东电工株式会社 垂直取向液晶膜及其制造方法
JP2021184046A (ja) * 2020-05-22 2021-12-02 大日本印刷株式会社 光学積層体、位相差フィルム、転写体、光学部材、表示装置、および光学部材の製造方法
JP7452244B2 (ja) 2020-05-22 2024-03-19 大日本印刷株式会社 光学積層体、位相差フィルム、転写体、光学部材、表示装置、および光学部材の製造方法

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