KR20220012288A - Method for manufacturing image display device and laminate for polarizer transfer - Google Patents

Abstract

This invention provides the manufacturing method of the image display apparatus which can suppress the flaw, deterioration, etc. of a polarizer, responding to further thickness reduction. In the method for manufacturing an image display device, in one embodiment, on at least one side of the image display cell, a polarizer of a polarizer transfer laminate LP1 in which a coating layer and a polarizer are laminated in this order on a release film is disposed on the image display cell side The process of laminating|stacking the laminated body LP1 for polarizer transcription|transfer is included as much as possible.

Description

Method for manufacturing image display device and laminate for polarizer transfer

This invention relates to the manufacturing method of an image display apparatus, and the laminated body for polarizer transcription|transfer.

For example, in a liquid crystal display device, a polarizing plate is pasted on both surfaces of the visual recognition side of a liquid crystal cell, and the light source side, In an organic electroluminescent display, a circularly polarizing plate is pasted together on the visual recognition side of an organic electroluminescent cell, have. Conventionally, these polarizing plates are made by bonding a polarizer protective film to a polarizer, and as a polarizer protective film, 40-, such as triacetyl cellulose (TAC), an acrylic resin, cyclic polyolefin (COP), polyethylene terephthalate (PET) Rigid films of 100 μm have been used. Moreover, between a polarizing plate and an image display cell, if it is a liquid crystal display device, it is an optical compensation film, and if it is an organic electroluminescent display, (lambda)/4 retardation film is normally laminated|stacked.

In accordance with the recent trend of reduction in thickness of image display apparatuses, a method has been proposed in which an adhesive layer is provided on the polarizer surface of a polarizing plate having a polarizer protective film on only one surface of the polarizer, and a polarizer and an image display cell are directly bonded (for example, , Patent Document 1). However, in terms of handling properties of the polarizer, preventing scratches on the surface of the polarizer due to contact with other articles, and preventing deterioration of the surface of the polarizer by moisture, detergent, and harmful gas components in the environment, etc., the polarizer protective film itself is It became essential, and since the polarizer protective film itself had a thickness of several tens of micrometers, it was a thing which could not fully respond to a thin-shaped image display apparatus.

Japanese Patent Laid-Open No. 2010-277018

The present invention has been made against the background of these prior art problems. That is, one objective of this invention is to provide the manufacturing method of the image display apparatus which can suppress the flaw, deterioration, etc. of a polarizer, responding to further thickness reduction.

MEANS TO SOLVE THE PROBLEM This inventor came to completion of this invention, as a result of earnestly examining in order to achieve this objective. That is, the present invention includes the following aspects.

Section 1.

A step of laminating a polarizer transfer laminate LP1 on at least one side of the image display cell so that the polarizer of the polarizer transfer laminate LP1 in which a coating layer and a polarizer are laminated in this order on a release film is disposed on the image display cell side; A method of manufacturing an image display device.

Section 2.

(A) On one side of the image display cell, a polarizer transfer laminate LP1 is laminated so that the polarizer of the polarizer transfer laminate LP1 in which a coating layer and a polarizer are laminated in this order on a release film is arranged on the image display cell side process, and

(B) on the other side of the image display cell, laminating the polarizer transfer laminate LP2 so that the polarizer of the polarizer transfer laminate LP2 in which the polarizer is laminated on the release film is arranged on the image display cell side; , a method of manufacturing an image display device.

Section 3.

The manufacturing method of the image display apparatus of Claim 1 or 2 in which laminated body LP1 for polarizer transcription|transfer has retardation layer on the opposite side to the coating layer of a polarizer.

Section 4.

The manufacturing method of the image display apparatus of Claim 2 or 3 in which laminated body LP2 for polarizer transcription|transfer has retardation layer on the opposite side to the releasability film of a polarizer.

Section 5.

The manufacturing method of the image display apparatus in any one of Claims 2-4 in which laminated body LP2 for polarizer transcription|transfer has a coating layer between a mold release film and a polarizer.

Section 6.

The manufacturing method of the image display apparatus in any one of Claims 1-5 in which a coating layer contains any of a hard-coat layer, a reflection reduction layer, and an antistatic layer.

Section 7.

The manufacturing method of the image display device in any one of Claims 1-6 whose image display cell is a liquid crystal display cell.

Section 8.

The manufacturing method of the image display apparatus in any one of Claims 1, 3, and 6 whose image display cell is an organic electroluminescent display cell.

Section 9.

A polarizer transfer laminate in which a coating layer and a polarizer are laminated in this order on a release film.

Section 10.

The laminated body for polarizer transcription|transfer of Claim 9 which further has a retardation layer on the opposite side to the coating layer of a polarizer.

ADVANTAGE OF THE INVENTION According to this invention, it can respond to further thickness reduction, and the image display apparatus which can suppress the flaw, deterioration, etc. of a polarizer can be manufactured.

In one embodiment of the present invention, in the method for manufacturing an image display device, the polarizer of the polarizer transfer laminate LP1 in which a coating layer and a polarizer are laminated in this order on at least one side of an image display cell on a release film is image displayed It is preferable to include the process of laminating|stacking the laminated body LP1 for polarizer transcription|transfer so that it may arrange|position on the cell side.

In addition, in one embodiment of the present invention, the method for manufacturing an image display device,

(A) On one side of the image display cell, a polarizer transfer laminate LP1 is laminated so that the polarizer of the polarizer transfer laminate LP1 in which a coating layer and a polarizer are laminated in this order on a release film is arranged on the image display cell side process, and

(B) on the other side of the image display cell, laminating the polarizer transfer laminate LP2 so that the polarizer of the polarizer transfer laminate LP2 in which the polarizer is laminated on the release film is arranged on the image display cell side; it is preferable

(Laminate LP1 for polarizer transfer)

It is preferable that LP1 has a coating layer and a polarizer in this order on a release film.

(Releasable Film)

As the release film for LP1, a film widely used as a release film can be suitably used. A releasability film consists of a single layer or a multilayer, and contains a base film at least. It is preferable that a base film is a resin film. The resin for the resin film is not particularly limited, and polyester, polycarbonate, polyamide, polyimide, polyamideimide, polystyrene, triacetyl cellulose, polypropylene, cyclic polyolefin, etc. can be used without limitation as long as they are resin films. . Among these, points, such as mechanical strength, heat resistance, and supply stability, polyester are preferable, Furthermore, polyethylene terephthalate is preferable. Moreover, an unstretched film or a stretched film may be sufficient as a base film. In the case of a stretched film, either a uniaxially stretched film or a biaxially stretched film may be sufficient. Among them, a biaxially stretched polyethylene terephthalate film is preferable.

When base film itself has releasability, a base film can be used as a releasability film as it is. Moreover, in order to adjust the releasability of a base film, you may surface treatment, such as a corona treatment, a plasma treatment, and a flame treatment.

The mold release film may have a mold release layer on the base film. As a mold release layer, a silicone type, an amino resin type, an alkyd resin type, a long-chain acrylic resin type, etc. are mentioned, The composition and type can be suitably selected according to the peeling force required.

The release film may have an easily adhesive layer between the base film and the release layer. As the easily adhesive layer, those conventionally used in each base film such as polyester, acrylic, and polyurethane can be used, and the base material to be used It can be selected according to the film and/or the release layer.

(coat layer)

The coating layer of the LP1 is composed of a single layer or multiple layers, and may be of any type as long as the constituent layers (each layer in the case of multiple layers) are formed by coating. The coating layer is preferably provided on the release surface of the release film. 50 micrometers is preferable, as for the upper limit of the thickness of a coating layer, 30 micrometers is more preferable, and its 20 micrometers is still more preferable. Although the lower limit of the thickness of a coating layer is not specifically limited, 0.1 micrometer is preferable, 0.5 micrometer is more preferable, and 1 micrometer is still more preferable. When a coating layer is comprised from several layers, it is preferable that the sum total of the thickness of several layers satisfy|fills the above. By reducing the thickness of the coating layer, the image display device can be made thinner.

The coating layer may be comprised of resin. Although a polyester resin, an acrylic resin, a polyurethane resin, polyvinyl alcohol, an epoxy resin, polyvinyl acetate etc. are mentioned as resin, It is not specifically limited to these. One type of resin may be used and may be used combining two or more types.

The said resin may be bridge|crosslinked. As a crosslinking agent, an isocyanate compound, an epoxy resin, a melamine resin, an oxazoline compound, a carbodiimide compound, etc. are mentioned. One type of crosslinking agent may be used and may be used combining two or more types.

The coating layer may be formed by curing (thermal curing, photocuring) of an acrylic monomer and/or oligomer.

As a coating layer, a reflection reduction layer, a hard-coat layer, an antistatic layer, etc. are mentioned, for example. A coating layer may have a protective function of a polarizer separately from a reflection reduction function, a hard-coat function, and an antistatic function, or in addition to these functions. The protective function of the polarizer includes, for example, a function of protecting the polarizer from scratches and damage before assembly into the image display device, and from scratches and damage due to contact with other members or the outside when using the image display device. Examples of the function of protecting the polarizer include a function of protecting the polarizer from harmful substances (liquids such as water, detergent, alcohol, and harmful gases such as SOx and NOx) exposed in the environment in which the image display device is used.

(reflection reduction layer)

The reflection reduction layer may be of any kind as long as it can reduce the reflectance at the interface with air. Reflection from external light can be suppressed by a reflection reduction layer, and an image can be made easy to see.

The upper limit of the reflectance of the reflection reducing layer is preferably 5%, more preferably 4%, still more preferably 3%, particularly preferably 2%, and most preferably 1.5%. By making the reflectance below the above, the display screen becomes easy to see. Although the lower limit of a reflectance is not specifically prescribed|regulated, Preferably it is 0.01 %, More preferably, it is 0.1 %. The reflectance is measured by the following method:

The laminated body for polarizer transcription|transfer is bonded together to a black acrylic board using HCP highly transparent adhesive transfer sheet 9483PL. The surface to bond is the surface (the surface of another layer when another layer is laminated|stacked on a polarizer surface or a polarizer) on the opposite side to the release film of the laminated body for polarizer transcription|transfer, and the surface of a black acrylic board. After bonding, the 5 degree reflectance in wavelength 550nm is measured using the sample which peeled the releasable film using the spectrophotometer (The Shimadzu Corporation make, UV-3150). In addition, the 5-degree reflectance is a reflectance when an incident angle is made into 5 degrees with respect to the transmission axis direction of the polarizer of a sample.

Various types of layers, such as a low reflection layer, a reflection prevention layer, and a glare-proof layer, are mentioned as a reflection reduction layer.

(low reflective layer)

The low-reflection layer is not particularly limited as long as it is a layer capable of reducing a refractive index difference with air, and examples thereof include a low-refractive-index layer. In the case of the low reflection layer, the upper limit of the reflectance is preferably 5%, more preferably 4%, still more preferably 3%. The lower limit of the reflectance is preferably 0.8%, more preferably 1%.

(Anti-reflection layer)

The antireflection layer is not particularly limited as long as it is a layer capable of preventing reflection by interfering the reflected light at the visual display side interface and the reflected light at the image display cell side interface. As an antireflection layer, the low-refractive-index layer whose thickness is about wavelength (400-700 nm)/(refractive index of low-refractive-index layer x 4) of visible light is mentioned, for example.

The antireflection layer may be a combination of a low-refractive-index layer and a high-refractive-index layer, and in such a combination, the low-refractive-index layer is preferably disposed on the viewing side (or the releasable film side). The antireflection layer may have two or more layers of a low-refractive-index layer and/or a high-refractive-index layer. Such an antireflection layer may further enhance the antireflection effect due to multiple interference.

In the case of the antireflection layer, the upper limit of the reflectance is preferably 2%, more preferably 1.5%, still more preferably 1.2%, particularly preferably 1%. The lower limit of the reflectance is preferably 0.01%, more preferably 0.1%.

(Low refractive index layer)

1.45 or less is preferable and, as for the refractive index of a low-refractive-index layer, 1.42 or less is more preferable. Moreover, 1.20 or more are preferable and, as for the refractive index of a low-refractive-index layer, 1.25 or more are more preferable. In addition, the refractive index of a low-refractive-index layer is a value measured on the conditions of wavelength 589nm.

Although the thickness of the low-refractive-index layer is not limited, normally, what is necessary is just to set suitably within the range of about 30 nm - about 1 micrometer. In addition, if the purpose of canceling the reflection of the interface on the viewing side of the low refractive index layer and the reflection of the interface on the image display cell side of the low refractive index layer to further lower the reflectance, the thickness of the low refractive index layer is preferably 70 to 120 nm, and 75 to 110 nm is more preferable.

The low-refractive-index layer is preferably (1) a layer made of a resin composition containing a binder resin and low-refractive-index particles, (2) a layer made of a fluorine-based resin that is a low-refractive-index resin, and (3) silica or magnesium fluoride. A layer made of a fluorine-based resin composition, (4) a thin film of a low-refractive-index material such as silica or magnesium fluoride, and the like.

As the binder resin contained in the resin composition of (1), polyester, polyurethane, polyamide, polycarbonate, acrylic, etc. can be used without particular limitation. Among them, acryl is preferable, and a thing obtained by superposing|polymerizing (crosslinking) a photopolymerizable compound by light irradiation is preferable.

As a photopolymerizable compound, a photopolymerizable monomer, a photopolymerizable oligomer, and a photopolymerizable polymer are mentioned, These can be adjusted suitably and can be used. As a photopolymerizable compound, the combination of a photopolymerizable monomer, a photopolymerizable oligomer, or a photopolymerizable polymer is preferable.

(photopolymerizable monomer)

The photopolymerizable monomer preferably has a molecular weight of less than 1000. Moreover, as a photopolymerizable monomer, the polyfunctional monomer which has two or more photopolymerizable functional groups (namely, bifunctional) is preferable.

As a polyfunctional monomer, for example, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, pentaerythritol tri(meth)acrylate, penta Erythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentylglycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate , Ditrimethylolpropane tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, tripentaerythritol octa (meth) acrylate, tetrapentaerythritol deca (meth) acrylate, isocyanuric acid tri (meth) Acrylate, isocyanuric acid di(meth)acrylate, polyester tri(meth)acrylate, polyester di(meth)acrylate, bisphenol di(meth)acrylate, diglycerin tetra(meth)acrylate, Damantyl di(meth)acrylate, isobornyl di(meth)acrylate, dicyclopentane di(meth)acrylate, tricyclodecane di(meth)acrylate, and those modified with PO, EO, etc. are mentioned. have.

Among these, from the viewpoint of obtaining a layer with high hardness, pentaerythritol triacrylate (PETA), dipentaerythritol hexaacrylate (DPHA), pentaerythritol tetraacrylate (PETTA), dipentaerythritol pentaacrylate (DPPA), etc. desirable. One type of a photopolymerizable monomer may be used and may be used combining two or more types.

(photopolymerizable oligomer)

It is preferable that a photopolymerizable oligomer is a thing of 1000 or more and less than 10000 weight average molecular weights. In this specification, a "weight average molecular weight" is a value obtained by melt|dissolving in solvents, such as THF, and polystyrene conversion by the conventionally well-known gel permeation chromatography (GPC) method. As a photopolymerizable oligomer, the polyfunctional oligomer more than bifunctional is preferable. As a polyfunctional oligomer, polyester (meth)acrylate, urethane (meth)acrylate, polyester-urethane (meth)acrylate, polyether (meth)acrylate, polyol (meth)acrylate, melamine (meth) Acrylate, isocyanurate (meth)acrylate, epoxy (meth)acrylate, etc. are mentioned. One type of photopolymerizable oligomer may be used and may be used combining two or more types.

(photopolymerizable polymer)

The photopolymerizable polymer preferably has a weight average molecular weight of 10000 or more, more preferably 10000 or more and 80000 or less, and still more preferably 10000 or more and 40000 or less from the viewpoints of coating aptitude and the appearance of the layer obtained. As a photopolymerizable polymer, the polyfunctional polymer more than bifunctional is preferable. Examples of the polyfunctional polymer include urethane (meth)acrylate, isocyanurate (meth)acrylate, polyester-urethane (meth)acrylate, and epoxy (meth)acrylate. Only one type may be used for a photopolymerizable polymer, and may be used combining two or more types.

Examples of the low-refractive-index particles contained in the resin composition of (1) include silica particles (for example, hollow silica particles) and magnesium bolus particles, and among them, hollow silica particles are preferable. Such hollow silica particles can be produced, for example, by the manufacturing method described in the Examples of Japanese Patent Application Laid-Open No. 2005-099778.

5-200 nm is preferable, as for the average particle diameter of the primary particle of low refractive index particle|grains, 5-100 nm is more preferable, 10-80 nm is still more preferable.

It is more preferable that the low-refractive-index particle|grains surface-treated by the silane coupling agent, and what was surface-treated especially with the silane coupling agent which has a (meth)acryloyl group is preferable. One type of low-refractive-index particle|grains may be used and may be used combining two or more types.

The resin composition of (1) may contain a polymerization initiator, the catalyst of a crosslinking agent, a polymerization inhibitor, antioxidant, a ultraviolet absorber, a leveling agent, surfactant, etc. other than the said component.

10-250 mass parts is preferable with respect to 100 mass parts of binder resin, as for content of the low-refractive-index particle|grains in a low-refractive-index layer (or resin composition of (1)), 50-200 mass parts is more preferable, 100-180 mass Addition is more preferable.

As the fluorine-based resin of (2), a polymerizable compound containing at least a fluorine atom in a molecule or a polymer thereof can be used. Although it does not specifically limit as a polymeric compound, For example, the compound which has hardening reactive groups, such as a photopolymerizable functional group and a thermosetting polar group, is preferable, and the compound which has these some hardening reactive groups simultaneously may be sufficient.

As a compound which has a photopolymerizable functional group, the fluorine-containing monomer which has an ethylenically unsaturated bond can be used widely, for example.

It is also preferable to add a well-known polysiloxane type or fluorine type antifouling|stain-resistant agent suitably to a low-refractive-index layer for the purpose of improving anti-fingerprint property. Preferred examples of the polysiloxane-based antifouling agent include, for example, polyether-modified polydimethylsiloxane having an acrylic group, polyether-modified dimethylsiloxane, polyester-modified dimethylsiloxane having an acryl group, polyether-modified polydimethylsiloxane, and polyester-modified polydimethyl Siloxane, aralkyl-modified polymethylalkylsiloxane, etc. are mentioned. The fluorine-based antifouling agent preferably has a substituent that contributes to the formation of the low-refractive-index layer or compatibility with the low-refractive-index layer. The substituent may be one or two or more, and a plurality of substituents may be the same as or different from each other. Examples of the preferable substituent include an acryloyl group, a methacryloyl group, a vinyl group, an aryl group, a cinnamoyl group, an epoxy group, an oxetanyl group, a hydroxyl group, a polyoxyalkylene group, a carboxyl group, and an amino group.

(High refractive index layer)

It is preferable to set it as 1.55-1.85, and, as for the refractive index of a high refractive index layer, it is more preferable to set it as 1.56-1.70. In addition, the refractive index of a high refractive index layer is a value measured on the conditions of wavelength 589nm.

It is preferable that it is 30-200 nm, and, as for the thickness of a high refractive index layer, it is more preferable that it is 50-180 nm. Although a plurality of layers may be sufficient as a high refractive index layer, two or less layers are preferable and a single layer is more preferable. When a high refractive index layer is comprised from several layers, it is preferable that the sum total of the thickness of several layers exists in the said range.

When the high refractive index layer is made into two layers, it is preferable to make the refractive index of the high refractive index layer on the low refractive index layer side higher, and specifically, the refractive index of the high refractive index layer on the low refractive index layer side is preferably 1.60 to 1.85, It is preferable that the refractive index of the other high refractive index layer is 1.55-1.70.

It is preferable that the high refractive index layer consists of a resin composition containing high refractive index particle|grains and a resin. Examples of the high refractive index particles include antimony pentoxide particles (1.79), zinc oxide particles (1.90), titanium oxide particles (2.3 to 2.7), cerium oxide particles (1.95), tin-doped indium oxide particles (1.95 to 2.00), and antimony-doped oxide particles. Tin particles (1.75 to 1.85), yttrium oxide particles (1.87), zirconium oxide particles (2.10), and the like are preferable. In addition, in the said parenthesis, the refractive index of each particle|grain material is shown. Among these, titanium oxide particles and/or zirconium oxide particles are suitable.

As for high refractive index particle|grains, only 1 type may be used and may use 2 or more types together. In particular, in order to prevent agglomeration, it is also preferable to combine the first high-refractive-index particles with the second high-refractive-index particles having a smaller surface charge amount than them. Moreover, it is also preferable from the point of dispersibility that the high refractive index particle|grains are surface-treated.

The preferred average particle diameter of the primary particles of the high refractive index particles is the same as that of the low refractive index particles.

It is preferable that content of high refractive index particle|grains is 30-400 mass parts with respect to 100 mass parts of resin, It is more preferable that it is 50-200 mass parts, It is more preferable that it is 80-150 mass parts.

Examples of the resin used for the high-refractive-index layer include the same resins as those exemplified in the low-refractive-index layer except for the fluorine-based resin.

The high-refractive-index layer and the low-refractive-index layer, for example, apply a resin composition containing a photopolymerizable compound to a releasable film and dry it, and then irradiate the resin composition with light such as ultraviolet rays. Thus, it can be formed by polymerizing (crosslinking) the photopolymerizable compound. Moreover, when providing a high-refractive-index layer and a low-refractive-index layer in a releasable film, it is preferable to make the releasable film side become a low-refractive-index layer.

A thermoplastic resin, a thermosetting resin, a solvent, a polymerization initiator, a dispersing agent, surfactant, antistatic agent, a silane coupling agent, a thickener, coloring to a high refractive index layer and a low refractive index layer (or the resin composition (paint) constituting them) as needed. An inhibitor, a colorant (pigment, dye), an antifoaming agent, a leveling agent, a flame retardant, a ultraviolet absorber, an adhesion-imparting agent, a polymerization inhibitor, an antioxidant, a surface modifier, a lubricant, and the like may be added.

(Anti-glare layer)

The anti-glare layer is not particularly limited as long as it is a layer capable of diffusely reflecting due to the unevenness of the surface. The glare-proof layer can prevent reflection of the shape of the light source when external light is reflected from the surface, or can reduce glare.

It is preferable that 50% or more of the area|region in which the inclination angle (surface angle) of the anti-glare surface is 0.05 degrees or more exists on the surface of an anti-glare layer, It is more preferable that it is 55 % or more, It is still more preferable that it is 60 % or more. Moreover, it is preferable that it is 95 %, and, as for the upper limit of the ratio of the area|region with a surface angle of 0.05 degrees or more, it is more preferable that it is 90 %. When the surface angle exists in the said range, the rainbow_pattern|erythema by interference of the anti-glare surface itself can be reduced.

It is preferable that the root mean square inclination (RΔq) of the surface of the anti-glare layer is 0.004 or less.

Kurtosis (Rku) on the surface of the anti-glare layer is preferably 5 or less, more preferably 4 or less, and still more preferably 3 or less. Rku is preferably 2 or more.

The skewness (RSk) of the surface of the anti-glare layer is preferably -1.0 to 1.0, more preferably -0.5 to 0.5, still more preferably -0.3 to 0.3.

The average inclination angle θa of the unevenness of the surface of the anti-glare layer is preferably 0.01 to 1.5°, more preferably 0.04 to 1.2°, and still more preferably 0.1 to 0.5°.

The arithmetic mean roughness (Ra) of the unevenness of the surface of the anti-glare layer is preferably 0.02 to 0.25 µm, more preferably 0.02 to 0.15 µm, still more preferably 0.02 to 0.12 µm.

The ten-point average roughness (Rzjis) of the unevenness of the surface of the anti-glare layer is preferably 0.15 to 2.00 µm, more preferably 0.20 to 1.20 µm, still more preferably 0.30 to 0.80 µm.

When the values of RΔq, Rku, RSk, θa, Ra, and Rzjis are equal to or more than the lower limit, it is possible to more effectively suppress the reflection of external light. When the values of RΔq, Rku, RSk, θa, Ra, and Rzjis are equal to or less than the upper limit, the luminance and contrast are excellent.

The average spacing (RSm) of irregularities on the anti-glare surface is preferably 50 to 600 µm, more preferably 100 to 400 µm, still more preferably 120 to 300 µm, particularly preferably 150 to 280 µm. to be. When the value of RSm is more than a lower limit, control of aggregation is easy. When the value of RSm is less than or equal to the upper limit, the detail of the image can be reproduced.

RΔq, Rku, RSk, θa, Ra, Rzjis, and RSm are calculated from roughness curves measured using a contact roughness meter in accordance with JIS B0601-1994 or JIS B0601-2001.

As a method of providing the unevenness|corrugation on the surface (surface on the side of a release film) of a glare-proof layer, the method of providing the unevenness|corrugation corresponding to the release surface of a release film is mentioned, for example, Specifically, (1) release property Methods, such as the method of providing the unevenness|corrugation in the base film of a film, and providing the layer which has unevenness|corrugation in the base film by (2) coating (or application|coating) are mentioned. In addition, in this specification, coating shall include not only the wet process of coating and solidifying a coating material, but dry processes, such as vapor deposition, sputtering, and CVD.

As the method of (1), it is sandblasting process; chemical etching; a method of bringing the release film into contact with a mold having an uneven structure; Methods, such as adding particle|grains to a release film, are mentioned.

As the method of (2), the base film contains fillers, such as particle|grains, the method of providing the layer whose thickness is thinner than the particle diameter of a filler; a method of applying a coating material for uneven transfer (curable composition, preferably photocurable composition) to a base film and then curing it by contacting it with a mold having unevenness; After coating the uneven transfer coating material (curable composition, preferably photocurable composition) to the metal mold|die which has unevenness|corrugation, the method of overlapping with a base film and hardening is mentioned.

The lower limit of the thickness of the anti-glare layer is preferably 0.1 µm, more preferably 0.5 µm. The upper limit of the thickness of the anti-glare layer is preferably 100 µm, more preferably 50 µm, still more preferably 20 µm.

The refractive index of the antiglare layer is preferably 1.20 to 1.80, more preferably 1.40 to 1.70. When the refractive index of the antiglare layer itself is lowered to obtain a low reflection effect, the refractive index of the antiglare layer is preferably 1.20 to 1.45, more preferably 1.25 to 1.40. When combining the low-refractive-index layer and the anti-glare layer, particularly when laminating the low-refractive-index layer and the anti-glare layer in this order on the release film, the refractive index of the anti-glare layer is preferably 1.50 to 1.80, more preferably 1.55 to 1.70. . In addition, the refractive index of a glare-proof layer is a value measured on the conditions of wavelength 589nm.

(hard coat layer)

The hard-coat (HC) layer can utilize suitably what is widely used as a hard-coat layer. H or more are preferable and, as for the pencil hardness of a hard-coat layer, 2H or more are more preferable. The hard-coat layer can be provided by apply|coating and hardening the composition (paint for hard-coat layer) containing a thermosetting resin or a radiation-curable resin, for example.

As a thermosetting resin, an acrylic resin, a urethane resin, a phenol resin, a urea melamine resin, an epoxy resin, an unsaturated polyester resin, a silicone resin, etc. are mentioned. One type of thermosetting resin may be used and may be used combining two or more types. To the composition, a curing agent is added to these curable resins as needed.

The radiation-curable resin is preferably a compound having a radiation-curable functional group. Examples of the radiation-curable functional group include ethylenically unsaturated bonding groups such as (meth)acryloyl, vinyl, and allyl groups, epoxy groups, and oxetanyl groups. have. Among these, a compound having an ethylenically unsaturated bond group is preferable, and a compound having two or more ethylenically unsaturated bond groups is more preferable, and among these, a polyfunctional (meth)acrylate-based compound having two or more ethylenically unsaturated bond groups is more preferably. As a polyfunctional (meth)acrylate type compound, a monomer, an oligomer, or a polymer may be sufficient.

As a specific example of a radiation-curable resin, what was illustrated as binder resin in a low-refractive-index layer is mentioned. One type of radiation-curable resin may be used and may be used combining two or more types.

In order to achieve the hardness as a hard coat, it is preferable that it is 50 mass % or more of a bifunctional or more than bifunctional monomer among the compounds which have a radiation-hardenable functional group, and it is more preferable that it is 70 mass % or more. Furthermore, it is preferable that it is 50 mass % or more of a trifunctional or more than trifunctional monomer among the compounds which have a radiation-hardenable functional group, and it is more preferable that it is 70 mass % or more.

The range of 0.1-100 micrometers is preferable and, as for the thickness of a hard-coat layer, the range of 0.8-20 micrometers is more preferable.

It is more preferable that it is 1.45-1.70, and, as for the refractive index of a hard-coat layer, it is still more preferable that it is 1.50-1.60. In addition, the refractive index of a hard-coat layer is a value measured on the conditions of wavelength 589nm.

As a method of adjusting the refractive index of a hard-coat layer, the method of adjusting the refractive index of resin, when adding particle|grains, the method of adjusting the refractive index of particle|grains, etc. are mentioned. Specific examples of the particles include those exemplified as particles of the anti-glare layer.

A hard-coat layer is good also as an independent layer, and it is also a preferable aspect to combine with a reflection reduction layer etc. When combining a hard-coat layer and a reflection reduction layer, it is preferable to laminate|stack a reflection reduction layer and a hard-coat layer in this order on a releasable film. In addition, in this specification, a hard-coat layer and a reflection reduction layer are collectively regarded as one member, and the member may be called a reflection reduction layer.

(Antistatic layer)

The antistatic layer is not particularly limited as long as it is a layer containing an antistatic agent. Examples of the antistatic agent include cationic antistatic agents such as quaternary ammonium salts; conductive polymers such as polyaniline and polythiophene; needle-like metal filler; Electroconductive high refractive index microparticles|fine-particles, such as tin-doped indium oxide microparticles|fine-particles and antimony-doped tin oxide microparticles|fine-particles, are mentioned. One type of antistatic agent may be used and may be used combining two or more types.

It is preferable that an antistatic layer contains binder resin in addition to an antistatic agent. As binder resin, polyester, polyurethane, polyamide, acryl, etc. are used. Only one type of binder resin may be used and may be used combining two or more types.

Moreover, an antistatic agent may be added to a hard-coat layer, and a hard-coat layer may function as an antistatic layer. As the antistatic agent added to the hard coat layer, the components of the above examples, for example, cationic antistatic agents such as quaternary ammonium salts, fine particles such as tin-doped indium oxide (ITO), conductive polymers, and the like can be used.

It is preferable that content of an antistatic agent is 1-30 mass % with respect to the total mass of the total solid of an antistatic layer (a hard-coat layer when a hard-coat layer has an antistatic function).

(polarizer)

As a polarizer (also called a polarizing plate, a polarizing film, a polarizing layer, etc.), what made iodine or an organic dichroic dye adsorb|suck to uniaxially stretched polyvinyl alcohol (PVA), for example (PVA polarizer), a liquid crystal compound and a dichroic A composition made of a sex dye coated and oriented (liquid crystal polarizer), wire grid polarizer, or the like can be used.

As an example of the method of providing a polarizer on a coating layer, in the case of a PVA polarizer, the method of (a) and (b) is mentioned.

(a) The method of bonding a PVA polarizer single-piece|unit.

(b) A method of transferring a PVA polarizer on a releasable substrate.

As the method of (a), the method of bonding a PVA polarizer single-piece|unit using an adhesive agent or an adhesive is mentioned, The method of bonding a PVA polarizer together using an adhesive agent or an adhesive to the coat layer on a release film is preferable. As thickness of this type of polarizer, 5-50 micrometers is preferable, Furthermore, 10-30 micrometers is preferable, and 12-25 micrometers is especially preferable. As for the thickness of an adhesive agent or an adhesive, 1-10 micrometers is preferable, More preferably, it is 2-5 micrometers.

In the method (b), examples of the releasable substrate include those cited as releasable films, and unstretched or uniaxially oriented films such as PET or polypropylene are preferable. As a method of laminating the PVA polarizer on the releasable substrate, PVA is coated on the releasable substrate, stretched together with the releasable substrate, iodine or an organic dichroic dye is adsorbed to the PVA, and the orientation is fixed with a boron compound. can be heard In addition, in this specification, the laminated body of a releasable base material and PVA polarizer may be called "the laminated body for PVA polarizer transcription|transfer".

In addition, as a transfer method, the polarizer side (surface on which the release property substrate is not laminated|stacked) of the PVA polarizer transcription|transfer laminated body, and the coating layer surface of the laminated body of a release film and a coating layer are bonded together with an adhesive agent or an adhesive, and, if necessary, The method of peeling a releasable base material is mentioned. As thickness of this type of polarizer, 1-10 micrometers is preferable, Furthermore, 2-8 micrometers is preferable, and 3-6 micrometers is especially preferable. As for the thickness of an adhesive agent or an adhesive, 1-10 micrometers is preferable, More preferably, it is 2-5 micrometers.

As an adhesive agent at the time of bonding together, ultraviolet curing adhesives, such as polyvinyl alcohol-type adhesive agent, acryl, and an epoxy, and thermosetting adhesives, such as an epoxy and an isocyanate (urethane), are used preferably. Moreover, a hot-melt adhesive agent may be sufficient as an adhesive agent. As an adhesive, an acrylic type, a urethane type, a rubber type, etc. are mentioned. Moreover, it is also preferable to use the transparent adhesive sheet for optics of an acrylic base material as an adhesive.

As an example of the method of providing a polarizer on a coating layer, in the case of a liquid crystal polarizer, the method of (c) and (d) is mentioned.

(c) The method of coating the coating material for liquid crystal polarizers.

(d) A method of transferring a liquid crystal polarizer on a releasable substrate.

As a method of (c), the coating material for liquid crystal polarizers containing a liquid crystal compound is coated on a coating layer, and the method of orientating and fixing a liquid crystal compound is mentioned. As a method of aligning and fixing the liquid crystal compound, the coating layer is subjected to a rubbing treatment, a liquid crystal polarizer paint is applied thereon, heated to align, and then cured with ultraviolet light to fix; The method of fixing, irradiating the ultraviolet-ray of polarized light after coating of the coating material for liquid crystal polarizers, orientating a liquid crystal compound, etc. are mentioned. Moreover, it is also a preferable method to provide an orientation control layer on a coating layer before coating the coating material for liquid crystal polarizers, ie, to laminate|stack a liquid crystal polarizer via an orientation control layer on a coating layer.

As the method of (d), a liquid crystal polarizer is laminated on a releasable substrate according to the above method (c), a coating layer is bonded to the liquid crystal polarizer surface using an adhesive or an adhesive, and the releasable substrate is peeled if necessary. how to do it As for the adhesive agent and adhesive at the time of bonding together, the thing mentioned above is mentioned. As a releasable base material, what was mentioned as a releasable base material of the laminated body for PVA polarizer transcription|transfer, a metal belt, etc. can be used. In addition, in this specification, the laminated body of a releasable base material and a liquid crystal polarizer may be called "a laminated body for liquid crystal polarizer transcription|transfer".

As thickness of a liquid crystal polarizer, 0.1-7 micrometers is preferable, Furthermore, 0.3-5 micrometers is preferable, and 0.5-3 micrometers is especially preferable. As for the thickness of an adhesive agent or an adhesive, 1-10 micrometers is preferable, More preferably, it is 2-5 micrometers.

In addition, an orientation control layer and a liquid crystal polarizer are demonstrated in detail.

(Orientation Control Layer)

Although the coating material for liquid crystal polarizers may be directly applied to a coating layer or a releasable base material, the method of providing an orientation control layer in advance and coating on this orientation control layer is also preferable. In addition, in this specification, the orientation control layer and liquid crystal polarizer may be considered together as one member, and the member may be called a liquid crystal polarizer. A liquid crystal polarizer combined with an orientation control layer may be called a liquid crystal polarizing layer in order to distinguish clearly from the liquid crystal polarizer as a generic name.

The alignment control layer may be any alignment control layer as long as it can bring the liquid crystal compound into a desired alignment state. Suitable examples of the orientation control layer include a rubbing treatment orientation control layer in which the surface is subjected to a rubbing treatment, and a photo-alignment control layer that orients molecules by irradiating light with polarized light to generate an orientation function.

(Rubbing treatment orientation control layer)

A polymer is usually used for the material of the rubbing process orientation control layer. As a polymer, polyvinyl alcohol and its derivative(s), polyimide and its derivative(s), an acrylic resin, polysiloxane derivative, etc. are used preferably. One type of polymer may be used and may be used combining two or more types.

The method of forming the rubbing treatment orientation control layer includes a step of rubbing the surface of the coating film obtained by applying the coating material for the rubbing treatment orientation controlling layer containing the polymer and the solvent on the release surface of the coating layer or the release property substrate. desirable. The coating material for a rubbing process orientation control layer may contain the crosslinking agent.

As a solvent for the coating material for a rubbing process orientation control layer, if it melt|dissolves a polymer material, it can use without limitation. As a specific example, Alcohol, such as water, methanol, ethanol, ethylene glycol, isopropyl alcohol, propylene glycol, and cellosolve; ester solvents such as ethyl acetate, butyl acetate, and gamma butyrolactone; ketone solvents such as acetone, methyl ethyl ketone, cyclopentanone and cyclohexanone; aromatic hydrocarbon solvents such as toluene or xylene; Ether solvents, such as tetrahydrofuran or dimethoxyethane, etc. are mentioned. One type of solvent may be used and may be used combining two or more types.

The concentration of the polymer in the rubbing treatment orientation-controlling layer coating material can be appropriately adjusted depending on the type of polymer or the thickness of the orientation-controlling layer to be produced. A range of % by mass is particularly preferred.

As a coating method, well-known methods, such as a coating method, such as a gravure coating method, a die-coating method, the bar coating method and the applicator method, and the printing method, such as a flexographic method, are employable.

It is preferable to dry (for example, heat-drying) after application|coating. Although the drying temperature also depends on the raw material of a release film, in the case of PET, 30 degreeC - 170 degreeC are preferable, More preferably, it is 50-150 degreeC, More preferably, it is 70-130 degreeC. When the drying temperature is within this range, there is no need to take a long drying time, so productivity is excellent, and there is no thermal elongation and thermal contraction of the transfer oriented film, so that the optical function as designed can be achieved, and the planarity is excellent. Drying time is 0.5-30 minutes, for example, 1-20 minutes are more preferable, Furthermore, 2-10 minutes are more preferable.

It is preferable that the thickness of a rubbing process orientation control layer is 0.01-10 micrometers, Furthermore, it is 0.05-5 micrometers, It is especially preferable that they are 0.1 micrometer - 1 micrometer.

A rubbing process can generally be performed by rubbing the surface in a fixed direction with paper or cloth. It is preferable that a rubbing process is the method of using the rubbing roller of raised fabrics of fibers, such as nylon, polyester, and acryl. The rubbing direction is preferably at an angle suitable for the direction when an orientation control layer orientated in a predetermined direction oblique to the longitudinal direction of the elongated film is provided. The angle can be adjusted by adjusting the angle between the rubbing roller and the film, the transport speed of the film and the rotation speed of the roller, and the like.

(optical orientation control layer)

The photo-alignment control layer is an alignment film to which an orientation control force is imparted by applying a paint for a photo-alignment control layer containing a polymer having a photoreactive group and/or a monomer and a solvent to a coating layer or a release property substrate, and irradiating polarized light, preferably polarized ultraviolet light. It is preferable to be The photoreactive group is preferably a group that generates liquid crystal alignment ability by irradiation with light, and specifically, causes alignment or isomerization of molecules generated by irradiation with light, and dimerization. It is preferably a group that generates a photoreaction that is the origin of the liquid crystal alignment ability, such as a reaction, a photocrosslinking reaction, or a photolysis reaction. Among the photoreactive groups, those that cause a dimerization reaction or a photocrosslinking reaction are preferable in terms of excellent orientation and maintaining a smectic liquid crystal state. The photoreactive group capable of generating the above reaction is preferably an unsaturated bond, particularly a double bond, and at least selected from the group consisting of C = C bond, C = N bond, N = N bond, and C = O bond. Groups having one are particularly preferred.

Examples of the photoreactive group having a C═C bond include a vinyl group, a polyene group, a stilbene group, a stilbazole group, a stilbazolium group, a chalcone group, and a cinnamoyl group. Examples of the photoreactive group having a C═N bond include a group having a structure such as an aromatic Schiff base and an aromatic hydrazone. Examples of the photoreactive group having an N=N bond include an azobenzene group, an azonaphthalene group, an aromatic heterocyclic azo group, a bisazo group, a formazan group, and an azoxybenzene group having a basic structure. Examples of the photoreactive group having a C═O bond include a benzophenone group, a coumarin group, an anthraquinone group, and a maleimide group. These groups may have a substituent such as an alkyl group, an alkoxy group, an aryl group, an allyloxy group, a cyano group, an alkoxycarbonyl group, a hydroxyl group, a sulfonic acid group, or a halogenated alkyl group. Although the number in particular of a substituent is not restrict|limited, For example, it is 1, 2, 3 or 4 pieces.

Among them, a photoreactive group capable of causing a photodimerization reaction is preferable, and a cinnamoyl group and a chalcone group have a relatively small amount of polarized light required for photo-alignment, and the photo-alignment control layer has excellent thermal and temporal stability. Since this is easy to obtain, it is preferable. Moreover, as a polymer which has a photoreactive group, it is especially preferable that the terminal part of the said polymer side chain has a cinnamoyl group such that it becomes a cinnamic acid structure. As a structure of a main chain, polyimide, polyamide, (meth)acryl, polyester, etc. are mentioned.

As a specific orientation control layer, Unexamined-Japanese-Patent No. 2006-285197, Unexamined-Japanese-Patent No. 2007-76839, Unexamined-Japanese-Patent No. 2007-138138, Unexamined-Japanese-Patent No. 2007-94071, Japanese Unexamined-Japanese-Patent No. 2007-121721, Japanese Patent Application Laid-Open No. 2007-140465, Japanese Patent Laid-Open No. 2007-156439, Japanese Patent Application Laid-Open No. 2007-133184, Japanese Patent Laid-Open No. 2009-109831, Japanese Unexamined Patent Application Publication No. 2002-229039 , Japanese Unexamined Patent Application Publication No. 2002-265541, Japanese Patent Application Laid-Open No. 2002-317013, Japanese Patent Publication No. 2003-520878, Japanese Patent Publication No. 2004-529220, Japanese Patent Application Laid-Open No. 2013-33248, Japanese Unexamined Patent Application Publication No. 2015 -7702 and the orientation control layer of Unexamined-Japanese-Patent No. 2015-129210 are mentioned.

As a solvent for the paint for the photo-alignment control layer, any solvent that dissolves a polymer and a monomer having a photoreactive group can be used without limitation. As a specific example, what is mentioned in the formation method of a rubbing process orientation control layer can be illustrated. It is also preferable to add a photoinitiator, a polymerization inhibitor, and various stabilizers to the paint for photo-alignment control layer. Further, to the coating material for the photo-alignment control layer, a polymer having a photoreactive group, a polymer other than the monomer, and a monomer having no photoreactive group copolymerizable with a monomer having a photoreactive group may be added.

The concentration of the polymer or monomer of the paint for the optical orientation controlling layer, the application method, and the drying conditions can also be exemplified by those cited in the rubbing treatment method for forming the orientation controlling layer. The thickness is also the same as the preferable thickness of the rubbing treatment orientation control layer.

It is preferable to irradiate polarized light from the direction of the photo-alignment control layer surface before orientation.

It is preferable that the wavelength of polarization is a wavelength range in which the photoreactive group of the polymer or monomer which has a photoreactive group can absorb light energy. Specifically, ultraviolet rays having a wavelength of 250 to 400 nm are preferable. Examples of the polarized light source include xenon lamps, high-pressure mercury lamps, ultra-high pressure mercury lamps, metal halide lamps, and ultraviolet light lasers such as KrF and ArF, and high-pressure mercury lamps, ultra-high pressure mercury lamps, and metal halide lamps are preferable.

Polarized light is obtained, for example, by passing light from the light source through a polarizer. By adjusting the polarization angle of the polarizer, the direction of polarization can be adjusted. Examples of the polarizer include a polarizing filter, a polarizing prism such as Glan Thompson and Glan Taylor, and a wire grid type polarizer. It is preferable that polarized light is substantially parallel light.

By adjusting the angle of the polarized light to be irradiated, the direction of the orientation regulating force of the optical orientation control layer can be arbitrarily adjusted.

Although irradiation intensity changes with the kind and quantity of a polymerization initiator or resin (monomer), for example, 10-10000 mJ/cm<2> is preferable based on 365 nm, Furthermore, 20-5000 mJ/cm<2> is preferable.

(liquid crystal polarizer)

It is preferable that a liquid crystal polarizer has a function as a polarizer which transmits light in only one direction, and contains a dichroic dye.

<dichroic dye>

It is preferable that a dichroic dye is an organic dye which has the property from which the absorbance in the long-axis direction of a molecule|numerator differs from the absorbance in a short-axis direction.

It is preferable that a dichroic dye has an absorption maximum wavelength (λMAX) in the range of 300-700 nm. Although an acridine dye, an oxazine dye, a cyanine dye, a naphthalene dye, an azo dye, an anthraquinone dye, etc. are mentioned, for example, as for such a dichroic dye, an azo dye is especially preferable. Examples of the azo dye include a monoazo dye, a bisazo dye, a trisazo dye, a tetrakisazo dye, and a stilbenazo dye, and preferably a bisazo dye and/or a trisazo dye. Although a dichroic dye may be individual or may combine 2 or more types, in order to adjust color tone (with an achromatic color), it is preferable to combine 2 or more types. It is especially preferable to combine three or more types. In particular, it is preferable to combine three or more types of azo compounds.

As a preferable azo compound, the pigment|dye of Unexamined-Japanese-Patent No. 2007-126628, Unexamined-Japanese-Patent No. 2010-168570, Unexamined-Japanese-Patent No. 2013-101328, and Unexamined-Japanese-Patent No. 2013-210624 is mentioned.

It is also a preferable aspect that a dichroic dye is a dichroic dye polymer introduce|transduced into polymer side chains, such as acryl. As a dichroic dye polymer, the polymer mentioned in Unexamined-Japanese-Patent No. 2016-4055, and the polymer which the compound of [Formula 6] - [Formula 12] of Unexamined-Japanese-Patent No. 2014-206682 were polymerized can be illustrated. .

From a viewpoint of making the orientation of a dichroic dye favorable, 0.1-30 mass % is preferable in a liquid crystal polarizer, as for content of the dichroic dye in a liquid crystal polarizer, 0.5-20 mass % is more preferable, 1.0-15 mass % is more preferable, and 2.0-10 mass % is especially preferable.

The liquid crystal polarizer preferably further contains a polymerizable liquid crystal compound in order to improve film strength, polarization degree, and film homogeneity. Further, the polymerizable liquid crystal compound includes a film after polymerization.

<Polymerizable liquid crystal compound>

It is preferable that a polymeric liquid crystal compound is a compound which has a polymeric group and shows liquid crystallinity. A polymerizable group means group which participates in a polymerization reaction, and it is preferable that it is a photopolymerizable group. Here, the photopolymerizable group refers to a group capable of polymerization reaction with an active radical, acid, or the like generated from a photopolymerization initiator described later. Examples of the polymerizable group include a vinyl group, a vinyloxy group, a 1-chlorovinyl group, an isopropenyl group, a 4-vinylphenyl group, an acryloyloxy group, a methacryloyloxy group, an oxiranyl group, and an oxetanyl group. . Among them, an acryloyloxy group, a methacryloyloxy group, a vinyloxy group, an oxiranyl group, and an oxetanyl group are preferable, and an acryloyloxy group is more preferable. The compound exhibiting liquid crystallinity may be a thermotropic liquid crystal or a lyotropic liquid crystal. Moreover, the thermotropic may be a nematic liquid crystal or a smectic liquid crystal may be sufficient as it.

The polymerizable liquid crystal compound is preferably a smectic liquid crystal compound, and more preferably a higher order smectic liquid crystal compound, from the viewpoint of obtaining higher polarization properties. If the liquid crystal phase formed by the polymerizable liquid crystal compound is a higher-order smectic phase, a liquid crystal polarizer having a higher degree of alignment order can be manufactured.

As a specific preferable polymeric liquid crystal compound, Unexamined-Japanese-Patent No. 2002-308832, Unexamined-Japanese-Patent No. 2007-16207, Unexamined-Japanese-Patent No. 2015-163596, Unexamined-Japanese-Patent No. 2007-510946, Japan, for example. Korean Patent Laid-Open No. 2013-114131, International Publication No. WO2005/045485, Lub et al. Recl. Trav. Chim. Pays-Bas, 115, 321-328 (1996), etc. are mentioned.

The content ratio of the polymerizable liquid crystal compound in the liquid crystal polarizer is preferably from 70 to 99.5 mass%, more preferably from 75 to 99 mass%, still more preferably from the viewpoint of improving the orientation of the polymerizable liquid crystal compound in the liquid crystal polarizer. It is 80-97 mass %, Especially preferably, it is 83-95 mass %.

A liquid crystal polarizer can be installed by coating the coating material for liquid crystal polarizers. The coating material for liquid crystal polarizers may also contain additives, for example, a solvent, a polymerization initiator, a sensitizer, a polymerization inhibitor, a leveling agent, a polymerizable non-liquid crystal compound, a crosslinking agent, etc. Only one type may be used for an additive, and may be used combining two or more types.

As the solvent, those exemplified as the solvent for the coating material for the orientation control layer are preferably used.

Although limitation will not be carried out as long as a polymerization initiator polymerizes a polymerizable liquid crystal compound, A photoinitiator which generate|occur|produces an active radical with light is preferable. As a polymerization initiator, a benzoin compound, a benzophenone compound, an alkylphenone compound, an acylphosphine oxide compound, a triazine compound, an iodonium salt, a sulfonium salt etc. are mentioned, for example.

As a sensitizer, a photosensitizer is preferable, for example, a xanthone compound, an anthracene compound, a phenothiazine, rubrene etc. are mentioned.

Hydroquinones, catechols, and thiophenols are mentioned as a polymerization inhibitor.

As a polymerizable non-liquid crystal compound, it is preferable to copolymerize with a polymeric liquid crystal compound, For example, when a polymeric liquid crystal compound has a (meth)acryloyloxy group, (meth)acrylates are mentioned. (meth)acrylates may be monofunctional or polyfunctional may be sufficient as them. By using polyfunctional (meth)acrylates, the intensity|strength of a polarizer can be improved. When using a polymerizable non-liquid crystal compound, in order to suppress the fall of a polarization degree, it is preferable to set it as 1-15 mass % in a liquid crystal polarizer, Furthermore, it is 2-10 mass %, Furthermore, it is 3-7 mass % especially. It is preferable to

As a crosslinking agent, the compound which can react with the functional group of a polymeric liquid crystal compound and a polymerizable non-liquid crystal compound is mentioned, An isocyanate compound, a melamine, an epoxy resin, an oxazoline compound, etc. are mentioned.

A liquid crystal polarizer can be produced by drying, heating, and hardening|curing as needed after coating the coating material for liquid crystal polarizers on a coating layer, a release property base material, or an orientation control layer.

As a coating method, well-known methods, such as a coating method, such as a gravure coating method, the die-coating method, the bar coating method, and the applicator method, and the printing method, such as a flexographic method, are employable.

Drying is preferably performed at a temperature of 30 to 170°C with a dryer (warm air dryer, infrared dryer, etc.). The drying temperature is more preferably 50 to 150°C, still more preferably 70 to 130°C, and the drying time is preferably 0.5 to 30 minutes, more preferably 1 to 20 minutes, and further more preferably 2 to 10 minutes. do.

In order to orientate the dichroic dye and a polymerizable liquid crystal compound in a liquid crystal polarizer more firmly, it can heat. It is preferable to make heating temperature into the temperature range in which a polymeric liquid crystal compound forms a liquid crystal phase.

When a polymerizable liquid crystal compound is contained in the coating material for liquid crystal polarizers, it is preferable to harden|cure it. Heating and light irradiation are mentioned as a hardening method, Light irradiation is preferable. It can be fixed in the state which orientated a dichroic dye by hardening. It is preferable to perform hardening in the state which formed the liquid crystal phase in the polymeric liquid crystal compound, and you may harden|cure by light irradiation at the temperature which shows a liquid crystal phase. As for the light in light irradiation, a visible light, an ultraviolet light, and a laser beam are mentioned. From the point of handling easiness, an ultraviolet light is preferable.

Although irradiation intensity changes with the kind and quantity of a polymerization initiator or resin (monomer), for example, 100-10000 mJ/cm<2> is preferable based on 365 nm, Furthermore, 200-5000 mJ/cm<2> is preferable.

In the liquid crystal polarizer, when the liquid crystal polarizer paint is applied on the alignment control layer, the dye is oriented along the alignment direction of the alignment layer and has a polarization transmission axis in a predetermined direction, but when the alignment control layer is not provided, the polarized light is A liquid crystal polarizer can also be orientated by irradiating and hardening the coating material for liquid crystal polarizers.

Although any may be sufficient as a method of providing a polarizer, the method of (b), (c), and (d) is especially preferable.

(retardation layer)

It is also a preferable aspect that LP1 has a retardation layer on the opposite side to the coating layer of a polarizer. The retardation layer is provided for optical compensation between a polarizer and an image display cell in the case of a liquid crystal display device, and is provided for reflection prevention in the case of an organic EL display device and a micro LED display device (λ/ 4 phase difference layer, λ/2 phase difference layer, etc.) are mentioned as typical examples.

The retardation layer is preferably a layer provided by coating of a coating material for retardation layer, and more preferably a layer provided by coating of a coating material containing a liquid crystal compound or a high molecular compound. The retardation layer can be suitably selected from a positive or negative A plate, a positive or negative C plate, an O plate, etc. according to the objective. As the C plate, a discotic liquid crystal compound is horizontally aligned (Japanese Patent Application Laid-Open No. 2008-40309), a rod-shaped liquid crystal compound is added to a chiral agent to form a twisted helical structure, and a polymer compound layer It is preferable, and it is especially preferable that the discotic liquid crystal compound was horizontally aligned. Examples of the A plate include those in which a rod-shaped liquid crystal compound is horizontally aligned, and the alignment direction (slow axis direction) is preferably parallel to the transmission axis of the polarizer.

Polymers, such as polyimide, polyamideimide, polyester, polyether ketone, polyarylether ketone, polyesterimide, which have at least 1 sort(s) of aromatic ring as a repeating unit as a polymer compound, are mentioned.

As a liquid crystal compound, it is preferable that it is a polymeric liquid crystal compound which has polymeric groups, such as a double bond, from the point of being able to fix an orientation state. Moreover, as a liquid crystal compound, a rod-shaped liquid crystal compound, a discotic liquid crystal compound, etc. can be used.

Examples of the rod-shaped liquid crystal compound include Japanese Patent Application Laid-Open No. 2002-030042, Japanese Patent Application Laid-Open No. 2004-204190, Japanese Patent Application Laid-Open No. 2005-263789, Japanese Patent Application Laid-Open No. 2007-119415, and Japanese Patent Application Laid-Open No. 2007-186430 and the rod-shaped liquid crystal compound which has a polymerizable group as described in Unexamined-Japanese-Patent No. 11-513360 and Unexamined-Japanese-Patent No. 11-513360.

As a specific rod-shaped liquid crystal compound,

CH ₂ =CHCOO-(CH ₂ ) _m -O-Ph1-COO-Ph2-OCO-Ph1-O-(CH ₂ ) _n -OCO-CH=CH ₂

CH ₂ =CHCOO-(CH ₂ ) _m -O-Ph1-COO-NPh-OCO-Ph1-O-(CH ₂ ) _n -OCO-CH=CH ₂

CH ₂ =CHCOO-(CH ₂ ) _m -O-Ph1-COO-Ph2-OCH ₃

CH ₂ =CHCOO-(CH ₂ ) _m -O-Ph1-COO-Ph1-Ph1-CH ₂ CH(CH ₃ )C ₂ H ₅

(wherein m and n are integers of 2 to 6,

Ph1 and Ph2 are 1,4-phenylene groups (Ph2 may be substituted with a methyl group at the 2nd position),

NPh is a 2,6-naphthylene group).

These rod-shaped liquid crystal compounds are marketed as LC242 etc. by the BASF company, and they can be used.

You may use these rod-shaped liquid crystal compounds combining multiple types by arbitrary ratios.

Examples of the discotic liquid crystal compound include a benzene derivative, a truxene derivative, a cyclohexane derivative, an azacrown type, and a phenylacetylene type macrocycle. As for the discotic liquid crystal compound, various things are also described also in Unexamined-Japanese-Patent No. 2001-155866, These are used suitably.

Among them, as the discotic liquid crystal compound, a compound having a triphenylene ring represented by the following general formula (1) is preferably used.

[Formula 1]

In the formula, R ₁ to R ₆ are each independently hydrogen, halogen, an alkyl group, or a group represented by -OX (where X is an alkyl group, an acyl group, an alkoxybenzyl group, an epoxy-modified alkoxybenzyl group, or an acryloyl oxide) a time-modified alkoxybenzyl group, and an acryloyloxy-modified alkyl group). It is preferable that R< ₁ >-R< ₆ > is an acryloyloxy modified|denatured alkoxybenzyl group (m is an integer of 4-10) represented by following General formula (2).

[Formula 2]

When used as optical compensation of a liquid crystal display device, the degree of phase difference is suitably set according to the type of a liquid crystal cell, and the property of the liquid crystal compound used for a liquid crystal cell. For example, in the case of a TN type, the inclination orientation which changes an inclination angle in the thickness direction using a discotic liquid crystal is used preferably. In the case of the VA type or IPS type, a C plate layer or A plate layer using a rod-shaped liquid crystal compound or a discotic liquid crystal compound is preferably used. Moreover, in the case of a λ/4 retardation layer and a λ/2 retardation layer, it is preferable to use a rod-like compound to form an A plate layer. These retardation layers may be used as a single layer, and may be used combining several retardation layers.

The method of forming the retardation layer may be a method of coating a coating material for a retardation layer on a polarizer, or a method of transferring a retardation layer (layered body for retardation layer transfer) on a releasable substrate to a polarizer may be used. Moreover, you may transcribe|transfer the polarizer (for example, a PVA polarizer, a liquid crystal polarizer) and retardation layer (a polarizer and the laminated body for retardation layer transcription|transfer) on a releasable base material to a coating layer. As the releasability base material of the laminate for retardation layer transfer and the laminate for polarizer and retardation layer transfer, those cited in the releasability base material for the laminate for PVA polarizer transfer can be used.

The coating material for retardation layers may also contain a solvent, a polymerization initiator, a sensitizer, a polymerization inhibitor, a leveling agent, a polymerizable non-liquid crystal compound, a crosslinking agent, etc. Those described in the orientation control layer or liquid crystal polarizer can be used for these.

As a method of orientating the liquid crystal compound of the retardation layer, the method similar to the orientation of the liquid layer polarizer mentioned above can be taken. That is, a method of directly coating the retardation layer paint on a polarizer or a releasable substrate to irradiate polarized ultraviolet light, a rubbing treatment of the polarizer or a releasable substrate, a method of installing an orientation control layer between the polarizer and the retardation layer, etc. are mentioned. . As for these conditions, the conditions demonstrated for an orientation control layer or a liquid crystal polarizer are used as preferable conditions.

You may provide two or more retardation layers. In this case, you may transcribe|transfer a some retardation layer to a polarizer using the laminated body which has a some retardation layer on one releasable base material. Moreover, you may transcribe|transfer the retardation layer to a polarizer one by one using two or more laminated bodies which have one retardation layer on one releasable base material. You may combine the coating method and the transcription|transfer method.

The retardation layer can be appropriately selected depending on the type of the image display cell. Hereinafter, the retardation layer used for a typical liquid crystal cell is demonstrated.

(retardation layer for TN type liquid crystal cell)

In the TN-type liquid crystal cell, the retardation layer is preferably a layer formed of a discotic liquid crystal compound, and the disk surface of the discotic structural unit of the discotic liquid crystal compound is a layer in which the inclination angle is gradually changed in the thickness direction of the retardation layer. Especially preferred.

The lower limit of the angle between the disk plane of the discotic structural unit of the discotic liquid crystal compound and the plane of the retardation layer is preferably 5 degrees, more preferably 10 degrees. The upper limit of this angle is preferably 85 degrees, more preferably 80 degrees.

The lower limit of the difference between the minimum and maximum angles between the disk plane of the discotic structural unit of the discotic liquid crystal compound and the plane of the retardation layer is preferably 10 degrees, more preferably 15 degrees. The upper limit of this difference becomes like this. Preferably it is 60 degrees, More preferably, it is 55 degrees.

The alignment direction of the discotic liquid crystal compound in the planar direction of the retardation layer is preferably adjusted so that the disk plane of the discotic structure of the discotic liquid crystal compound is parallel to the absorption axis of the polarizer in a linear state.

The lower limit of the retardation Rth (((nx+ny)/2-nz)xd) in the thickness direction of the retardation layer is preferably 20 nm, more preferably 50 nm, still more preferably 100 nm. The upper limit of Rth is preferably 400 nm, more preferably 380 nm, still more preferably 350 nm.

The retardation layer does not have a specific optical axis, but preferably has the minimum absolute value of retardation in the direction inclined from the normal direction. The lower limit of the angle between the direction in which the absolute value of the retardation becomes the minimum and the normal direction is preferably 5 degrees, more preferably 10 degrees. The upper limit of this angle is preferably 50 degrees, more preferably 40 degrees.

By making the characteristics of the retardation layer as described above, it is possible to effectively prevent light leakage and a change in color tone when the image display device is viewed from an angle, so that the viewing angle can be widened.

In general, it is preferable that the polarizer used for the TN type liquid crystal cell has an absorption axis of 45 degrees with respect to the side of the liquid crystal cell. When the laminated body for polarizer transcription is made into a rolled article in a wound state, from the point of the convenience of bonding to a liquid crystal cell, the direction of the absorption axis of a polarizer is the roll shape of the laminated body for polarizer transcription wound up. It is preferable to make it 45 degree|times with respect to a longitudinal direction (for example, a film flow direction or the winding-up direction of a roll). In this case, it is preferable that the retardation layer is laminated|stacked on the roll-shaped laminated body for polarizer transcription|transfer according to the absorption axis direction of a polarizer.

In the roll-shaped laminated body for polarizer transcription in which such an absorption axis became oblique, it is preferable that a polarizer is a liquid-crystal polarizer from manufacturing easiness.

The polarizer transfer laminate makes the absorption axis of the polarizer in a direction parallel or perpendicular to the longitudinal direction, and the roll-shaped polarizer transfer laminate is cut obliquely with respect to the longitudinal direction, and may be transferred to a liquid crystal cell using this. .

When the retardation layer is provided on the viewing side and the light source side of the liquid crystal cell, the viewing side retardation layer and the light source side retardation layer are not particularly limited as long as they are optically compensated as a whole, and even if the phase difference layers on the viewing side and the light source side are not the same do. For example, when the viewing side retardation layer is an oblique alignment layer of the discotic liquid crystal, it is preferable not to provide a light source side retardation layer, or to use the light source side retardation layer as an A plate layer or a C plate layer, or a composite layer thereof. is the form Moreover, it is also a preferable aspect to make the visual recognition side retardation layer and the light source side retardation layer into the same retardation layer.

(retardation layer for VA type liquid crystal cell)

VA type liquid crystal cell WHEREIN: It is preferable that the refractive index ellipsoid of the retardation layer is disk shape (for example, red bean shape) - ellipsoid shape (for example, hamburger shape) with thickness.

The in-plane retardation (Re) of the retardation layer is preferably 0 to 200 nm, the retardation (Rth) in the thickness direction is preferably 70 to 400 nm, and it is preferable to satisfy Re<Rth.

The lower limit of Re is more preferably 10 nm, still more preferably 20 nm. The upper limit of Re is more preferably 100 nm, still more preferably 70 nm.

The lower limit of Rth is more preferably 100 nm, still more preferably 120 nm. The upper limit of Rth is more preferably 350 nm, still more preferably 300 nm, particularly preferably 250 nm.

The lower limit of Rth-Re is preferably 20 nm, more preferably 40 nm, still more preferably 50 nm. The upper limit is preferably 300 nm, more preferably 250 nm, still more preferably 200 nm.

By making Re, Rth, and the difference (Rth-Re) within the above ranges, it is possible to effectively reduce the occurrence of light leakage depending on the angle, deterioration of gradation, and deviation of color tone. .

The retardation layer is preferably a retardation layer formed of a discotic liquid crystal compound or a rod-shaped liquid crystal compound. In addition, as suitable examples of the retardation layer, specifically, only the C plate layer (eg, the negative C plate layer), only the A plate layer (eg, the positive A plate layer), the C plate layer and the A plate layer combinations of , and orthogonal combinations of A plate layers.

When the retardation layer is provided on the viewing side and the light source side of the liquid crystal cell, the viewing side retardation layer and the light source side retardation layer are not particularly limited as long as they are optically compensated as a whole, and even if the phase difference layers on the viewing side and the light source side are not the same do. For example, when optical compensation is performed with a combination of the A plate layer and the C plate layer, the light source side retardation layer is not provided by using the visual side retardation layer as the combination of the A plate layer and the C plate layer, or the visual side retardation layer is not provided. It is also a preferable aspect to use an A plate, use the light source side retardation layer as a C plate layer, or use the viewer side retardation layer as a C plate and use the light source side retardation layer as an A plate layer. Moreover, it is also a preferable aspect to make the visual recognition side retardation layer and the light source side retardation layer into the same retardation layer.

It is preferable that the absorption axis of the polarizer (in the case of a composite polarizer, for example, an absorption type polarizer) be parallel or perpendicular to the side of the liquid crystal cell. It is preferable that the absorption axis of the polarizer (eg roll film) be parallel or perpendicular to the longitudinal direction (eg film flow direction or roll winding direction).

(Retardation layer for IPS type liquid crystal cell)

In the case of an IPS type liquid crystal cell, although it is preferable not to provide a phase difference layer, you may provide a phase difference layer. In the IPS type liquid crystal cell, the influence of the liquid crystal compound of the liquid crystal cell is small, but when the display is viewed from an oblique direction, the absorption axis of the light source side polarizer and the absorption axis of the viewing side polarizer are shifted from 90 degrees, so that light leakage occurs. When using a retardation layer, it is preferable to correct the shift|offset|difference of this angle.

It is preferable that Re of the retardation layer is appropriately selected in accordance with the design idea within the range of 0 to 360 nm in absolute value, and Rth of the retardation layer in the range of 0 to 360 nm in absolute value. The retardation layer is preferably a combination of a positive C plate and a positive A plate, in which a plurality of refractive index ellipsoids (eg, hamburger-shaped ones) are arranged in a horizontal direction. In each plate, it is preferable that nx>nz≥ny or nz>nx>ny.

It is also preferable to laminate a plurality of retardation layers in a vertical direction in combination. The retardation layer preferably has at least a positive C plate layer. Re of the positive C plate layer is preferably -10 to 10 nm, more preferably -5 to 5 nm. Rth of the positive C plate layer is preferably -220 to -50 nm, further preferably -200 to -60 nm. It is preferable that the positive C plate layer is one in which the rod-shaped liquid crystal compound is vertically aligned.

The positive C plate layer is preferably combined with the positive A plate layer. 50-230 nm of Re of a positive A plate layer is preferable, Furthermore, 80-220 nm is preferable. 30-150 nm is preferable and, as for Rth of a positive A plate layer, 60-130 nm is further more preferable. 0.8-1.2 are preferable and, as for nz((nx-nz)/(nx-ny)) of positive A plate layer, 0.9-1.1 are further more preferable. The positive A plate layer is preferably a rod-shaped liquid crystal compound horizontally aligned, and the alignment direction (slow axis direction) is preferably parallel to the transmission axis of the polarizer.

The order of lamination of the positive C plate layer and the positive A plate layer is not limited, but it is preferable to set the positive C plate layer to the liquid crystal cell side. In addition, it is preferable that the combination of the positive C plate layer and the positive A plate layer is used as the retardation layer on the visual side of the liquid crystal cell, and the phase difference layer is not provided on the light source side of the liquid crystal cell, but a retardation layer may be provided separately. . Moreover, the positive C plate layer may be used on either side of the light source side and the visual recognition side, and the positive A plate layer may be used on the other side. In this case, an optical characteristic can be adjusted suitably.

In the case of an IPS type liquid crystal cell, similarly to that for a VA type liquid crystal cell, the absorption axis of a polarizer (for example, a roll film) is oriented so as to be parallel or perpendicular to the longitudinal direction (for example, a film flow direction or a roll winding direction) It is preferable that it has been

Incidentally, in the description of the retardation layer for each type of liquid crystal cell, the angle (45 degrees, parallel, perpendicular) preferably includes an error of 5 degrees, more preferably 3 degrees, and still more preferably 2 degrees.

(organic EL display)

The organic EL display device preferably has a circularly polarizing plate on the visual recognition side of the organic EL cell for the purpose of preventing reflection. The retardation layer in the circularly polarizing plate is preferably a λ/4 retardation layer. Hereinafter, the λ/4 retardation layer will be described in detail.

(λ/4 retardation layer)

The λ/4 retardation layer converts linearly polarized light that has passed through the polarizer into circularly polarized light, and converts circularly polarized light reflected from wiring in an organic EL cell, a glass substrate, etc. into linearly polarized light that is shifted by 90 degrees from the incident linearly polarized light. . The λ/4 retardation layer may be a single λ/4 retardation layer or a composite λ/4 retardation layer of a λ/4 retardation layer and a λ/2 retardation layer. A C plate layer or the like may be provided in the λ/4 phase difference layer. In this specification, the single-layer retardation layer and the composite λ/4 retardation layer are collectively referred to as a λ/4 retardation layer in some cases.

As for the in-plane retardation of (lambda)/4 retardation layer, 100-180 nm is preferable, More preferably, it is 120-150 nm. As for the in-plane retardation of (lambda)/2 phase difference layer, 200-360 nm is preferable, More preferably, it is 240-300 nm.

(λ/4 angle of slow axis of retardation layer)

In the case of a single-layer λ/4 retardation layer, the angle between the orientation axis (slow axis) of the λ/4 retardation layer and the transmission axis of the polarizer is preferably 35 to 55 degrees, more preferably 40 to 50 degrees, still more preferably It is usually 42-48 degrees.

In the case of a composite λ/4 retardation layer in which a λ/4 retardation layer and a λ/2 retardation layer are combined, the orientation axis (slow axis) of each retardation layer is arranged at the same angle as the retardation of λ/4 in both layers. it is preferable Specifically, the angle (θ) between the orientation axis (slow axis) of the λ/2 phase difference layer and the transmission axis of the polarizer is preferably 5 to 20 degrees, more preferably 7 to 17 degrees. The angle between the orientation axis (slow axis) of the λ/2 retardation layer and the orientation axis (slow axis) of the λ/4 retardation layer is preferably in the range of 2θ+45°±10°, more preferably in the range of 2θ+45°±5° and more preferably in the range of 2θ+45°±3°.

Examples of the λ/4 phase difference layer include Japanese Patent Laid-Open No. 2008-149577, Japanese Patent Application Laid-Open No. 2002-303722, International Publication WO2006/100830, Japanese Patent Application Laid-Open No. 2015-64418, Japanese Patent Application Laid-Open No. 2018-10086 No. publications, etc. may be referred to.

Moreover, in order to reduce the color change etc. in the case of oblique view, it is also a preferable form to provide a C plate layer on the (lambda)/4 phase difference layer. As the C plate layer, a positive or negative C plate layer is selected according to the characteristics of the λ/4 retardation layer and the λ/2 retardation layer.

In the composite λ/4 retardation layer, as a lamination method of the λ/4 retardation layer and the λ/2 retardation layer, for example,

A method in which a λ/2 retardation layer is provided on a polarizer by transfer and a λ/4 retardation layer is provided thereon by transfer

A method in which a λ/2 retardation layer is provided on a polarizer by transfer and a λ/4 retardation layer is provided thereon by coating

A method in which a λ/2 retardation layer is provided on a polarizer by coating, and a λ/4 retardation layer is provided thereon by transfer

A method of providing a λ/2 retardation layer and a λ/4 retardation layer on a polarizer by coating

- A λ/4 retardation layer and a λ/2 retardation layer are provided in this order on a releasable substrate, and a method of transferring these onto a polarizer is exemplified.

As a method of laminating a C plate layer on the λ/4 retardation layer, a method of providing a C plate layer by transfer on a λ/4 retardation layer on a polarizer, a C plate layer is provided on a releasable substrate, and further Various methods can be employed, such as a method of providing a single λ/4 retardation layer or a composite λ/4 retardation layer (λ/2 retardation layer and λ/4 retardation layer) on this and transferring them to a polarizer.

As a method of measuring the retardation of the retardation layer, for example, using an automatic birefringometer (KOBRA series, Oji Keisoku Co., Ltd., etc.), the surface of the retardation layer is measured at 0 degrees with respect to the normal A method of measuring by tilting to 50 degrees at intervals of 10 degrees in the optical axis direction, inputting the film thickness and the average refractive index na to the attached software, and calculating the method is mentioned.

Alternatively, for example, the retardation (R0=Re) is measured from the normal direction with the aforementioned automatic birefringometer or the like, and the surface of the retardation layer is further rotated from the normal direction to the in-plane optical axis direction by 40 degrees. The retardation (R40) is measured by tilting, and from the values of these retardation, the thickness d of the retardation layer, and the average refractive index na of the retardation layer, nx by the following formulas (2), (3), and (4) , ny, and nz can be found, and Rth can be calculated by substituting them into Equation (1).

Rth=[(nx+ny)/2-nz]×d (One)

R0=(nx-ny)×d (2)

R40 = (nx-ny') × d/cos(φ) (3)

(nx+ny+nz)/3=na (4)

Also,

φ=sin ^-1 [sin(40°)/na]

ny' = ny × nz/[ny ² × sin ² (φ) + nz ² × cos ² (φ)] ^1/2

The average refractive index na can use the value calculated|required by the following method, for example.

Value measured with an Abbe refractometer using a thin film section obtained by irradiating ultraviolet rays in an amorphous state after removing the solvent of the paint for the retardation layer

・Values of retardation layers made of similar compositions or their average values

A value calculated when measuring Re by orienting it to have an optical axis in the plane, calculating nx and ny from the film thickness, and making nz the same value as nx (negative A plate) or ny (positive A plate)

The sample for retardation measurement of retardation layer provided retardation layer in the glass film under the same conditions, for example; What provided the retardation layer on the same conditions on the releasability base material, and transcribe|transferred this to a glass plate is mentioned.

(Interlayer protective layer)

LP1 is between any two layers (for example, between a polarizer and a retardation layer, a surface where the polarizers of the retardation layer are not laminated, between a plurality of retardation layers, between an adhesive or a pressure-sensitive adhesive and a polarizer or a retardation layer ), you may have an interlayer protective layer. The interlayer protective layer can prevent a decrease in the degree of polarization or a change in the phase difference from migrating to an adjacent layer of a component or solvent used in each layer. The interlayer protective layer may be provided on the releasable substrate together with the retardation layer and/or the polarizer and transferred to the object.

As an interlayer protective layer, a transparent resin layer etc. are mentioned, for example. Examples of the transparent resin include, but are not particularly limited to, polyvinyl alcohol, ethylene vinyl alcohol copolymer, polyester, polyurethane, polyamide, polystyrene, acrylic resin, and epoxy resin. The transparent resin may be crosslinked with a crosslinking agent to form a crosslinked structure. Moreover, what hardened|cured (for example, photocured) curable (for example, photocurable) compositions, such as acrylic, like a hard coat|coat may be sufficient. In addition, after the interlayer protective layer is provided on the orientation film, the interlayer protective layer is rubbed, and a liquid crystal compound orientation layer (liquid crystal polarizer, retardation layer, etc.) may be provided without providing an orientation control layer thereon.

It is preferable that the retardation layer is provided in the polarizer directly or through an interlayer protective layer. In addition, that the retardation layer is provided in the polarizer directly includes not only the polarizer and the retardation layer are in contact, but also the thing in which the polarizer and retardation layer are bonded together with an adhesive agent or an adhesive. As for the adhesive agent or adhesive at the time of bonding together, the thing mentioned above is mentioned.

(Laminate LP2 for polarizer transfer)

It is preferable that LP2 has a polarizer on a release film. Moreover, it is preferable that LP2 has a retardation layer on the opposite side to the releasability film of a polarizer, and it is preferable to have a coating layer between a releasability film and a polarizer.

The release film used for LP2 is the same as that described for LP1. The release film used in LP2 may be the same as or different from the release film used in LP1.

The coating layer used for LP2 is the same as that described for LP1. The coating layer used in LP2 may be the same as or different from the coating layer used in LP1.

The polarizer used for LP2 is the same as that described for LP1. The polarizer used in LP2 may be the same as or different from the polarizer used in LP1.

In addition, when LP2 does not have a coating layer between the release film and the polarizer, in the description of the method for installing the polarizer and the orientation control layer described in LP1, "coat layer" is "releasable film", "releasability film" The "coating layer surface of the laminated body of a coating layer" can be read interchangeably with "release surface of a releasable film".

The retardation layer used for LP2 is the same as that described for LP1. The retardation layer used in LP2 may be the same as or different from the retardation layer used in LP1.

As for LP1 and LP2, in order to protect the surface (a polarizing surface, retardation layer surface, etc.) on the side on which an image display cell is laminated|stacked, the masking film may be stuck to the surface. As a masking film, what provided adhesive layers, such as an acrylic type, a rubber type, polyolefin type, to base materials, such as polyethylene, polypropylene, and polyester, is used preferably. Instead of the masking film, the releasable base material used when transferring a polarizer, retardation layer, etc. may remain|survived.

It is preferable that a masking film and a releasability base material peel just before bonding together to an image display cell, or immediately before providing an adhesive layer or an adhesive bond layer.

In addition, LP1 and LP2 may provide an adhesive layer or an adhesive layer for bonding an image display cell together on a polarizer surface or a retardation layer surface, etc., Furthermore, a separator may be laminated|stacked on these adhesive bond layer or adhesive layer. . As a separator, the thing quoted by the releasability base material of the laminated body for PVA polarizer transcription|transfer can be used.

It is preferable that LP1 and LP2 do not have a self-supporting film other than the film for manufacturing processes as a structural layer. The self-supporting film was independently manufactured as a film here. As a self-supporting film, a polarizer protective film is mentioned, for example. Although the film for manufacturing processes is used for manufacture of the laminated body for polarizer transcription|transfer, it is a member finally removed in an image display apparatus, For example, a release film, a release property base material, a masking film, a separator, etc. are mentioned.

Each layer constituting LP1 and LP2 is preferably provided by coating or by transferring. Thereby, further thickness reduction and weight reduction can be aimed at.

(image display cell and image display device)

In general, a liquid crystal cell in which a liquid crystal compound is sealed in a glass plate having an electrode in a liquid crystal display device, etc. is called an organic EL cell have. In this invention, the state before installing a polarizing plate in this way is called an image display cell.

Moreover, in general, a state in which a polarizing plate is provided in an image display cell and an image can be displayed when a signal is input, and a state in which a member such as a touch panel is laminated thereon is called an image display panel, and A device in which an image display panel is incorporated in a case or the like together with a signal controller for displaying is called an image display device in some cases. The image display apparatus of the present invention preferably includes an image display panel, that is, a state in which an image can be displayed when a signal is input.

(liquid crystal display)

In the liquid crystal display device, it is preferable that polarizers are provided on both sides of the liquid crystal cell. It is preferable that the polarizer of at least one side of a liquid crystal display panel is the said polarizer, and it is preferable that the polarizer of both surfaces is the said polarizer. As for the order of installing a polarizer in a liquid crystal cell, even if the visual recognition side is the front, the light source side may come forward, and the same may be sufficient as it.

(Conjugation of LP1)

It is preferable that a liquid crystal display device has LP1 on the visual recognition side of a liquid crystal cell. As a method of bonding LP1 to the viewing side of the liquid crystal cell, the viewing side of the liquid crystal cell and the surface on the opposite side to the release film of LP1 (polarizing surface or the surface of another layer when another layer is laminated on the polarizer) ) and the method of bonding together using an adhesive agent or an adhesive is mentioned. As an adhesive agent or adhesive agent, the adhesive agent or adhesive agent which bonds each layer of LP1 together is used preferably. An adhesive agent or an adhesive may be previously installed in LP1, and may be coated to LP1 or a liquid crystal cell just before bonding together.

When using an adhesive agent for bonding, according to the kind of adhesive agent, it is preferable to irradiate a heating or radiation and to harden an adhesive agent.

At the time of bonding, for LP1, you may use the sheet|leaf material cut to the required length. Moreover, when LP1 is a roll film, you may cut out to required length, just before bonding or bonding together to a liquid crystal cell, unwinding LP1. For example, when LP1 is a roll film in which a base-less transparent adhesive sheet for optics is laminated on a retardation layer, the release layer of the transparent adhesive sheet for optics is peeled off while unwinding LP1 and bonded to a liquid crystal cell from the end, or What is necessary is just to cut to the required length after cutting to length and bonding together on the whole surface, or bonding together on the whole surface. The cut can be made with a blade, laser, or the like.

When a liquid crystal display device is a stationary VA type or an IPA type, it is preferable to bond LP1 together so that the absorption axis of a polarizer may become a horizontal direction.

After bonding LP1, you may peel a releasability film. Peeling of a releasable film may be performed immediately after bonding together, and in order to prevent a flaw in conveyance in the next process or after that, you may peel just before granulation into a final form, or after granulation into a final form. Moreover, after an image display apparatus is handed over to the last consumer, the final consumer may peel.

(Conjugation of LP2)

It is preferable that a liquid crystal display device has LP2 on the light source side of a liquid crystal cell. The bonding method of LP2 may be the same as or different from the bonding method of LP1. However, when a liquid crystal display device is a stationary type VA type or an IPA type, it is preferable to bond LP2 together so that the absorption axis of a polarizer may become a perpendicular direction.

LP2 may use the laminated body for polarizer transcription|transfer of LP1 as LP2, when the layer structure is the same as that of LP1. However, since the absorption axis direction of the polarizer on the viewing side and the absorption axis direction of the polarizer on the light source side are generally installed to be perpendicular to each other in liquid crystal display devices, it is recommended to change the width and length according to the size of the liquid crystal display cell in LP1 and LP2. desirable.

The release film of LP2 may be peeled off as on LP1, but preferably peeled off prior to assembly into final form.

It is preferable that a liquid crystal display device has a reflection type polarizing plate between a light source side polarizer and a light source unit. As a reflection type polarizing plate, the brightness improvement film DBEF series sold by 3M company is mentioned, for example. After peeling a releasable film, a reflective polarizing plate may be bonded together to a polarizer surface or a coating surface using an adhesive agent or an adhesive.

(organic EL display)

The organic EL display device preferably has LP1 on the visual recognition side of the organic EL cell.

After bonding LP1, you may peel a releasability film. Peeling of a releasable film may be performed immediately after bonding together, and may peel after granulation in the intermediate step until granulation in a final form, or a final form. Moreover, after an image display apparatus is handed over to the last consumer, the final consumer may peel.

The organic EL display device may be of a foldable type (folding type) or a rollable type (winding type). The organic EL display device of the present invention can be reduced in thickness and has good folding properties and winding properties.

Example

Hereinafter, the present invention will be described in more detail with reference to Examples. This invention is not limited to the following example, It is also possible to add a change suitably in the range which can suit the meaning of this invention, and to implement. All of them are included in the technical scope of the present invention.

The retardation measurement of the retardation layer in the laminated body of an Example is as follows.

(Measurement of retardation of retardation layer)

On the non-adhesive layer surface of a 50 μm-thick polyester film (Cosmo Shine (TM) A4100 manufactured by Toyobo Corporation), an orientation control layer and a retardation layer are installed under the same conditions as in Examples to be described later, This was transcribed on a glass plate (35 mm x 35 mm), and it was set as the sample for a measurement. An ultraviolet curing adhesive was used for transcription|transfer.

Using an automatic birefringent meter (KOBRA-WR, Oji Keisoku Co., Ltd.) for the sample, the retardation value (Re) measured from the vertical direction when the wavelength used is 590 nm is measured, and further, the retardation layer paint In the case of the retardation layer using B, the slow axis in the film plane is the inclination axis (rotation axis), and in the case of the retardation layer using the paints A and C for the retardation layer, any direction within the film plane is the inclination axis, and the film normal The retardation value was similarly measured by inclining to 50 degrees at intervals of 0 to 10 degrees, and Rth was calculated|required from this value, thickness, and average refractive index.

The thickness was calculated|required by embedding the film in the epoxy resin, cutting out the cross-section, and observing with a polarizing microscope.

The average refractive index was 1.60 in the case of the retardation layer using the paints B and C for the retardation layer, and 1.66 in the case of the retardation layer using the paint A for the retardation layer.

Each layer in the laminated body of an Example is demonstrated below.

(Releasable Film)

As the release film, a 50 µm-thick polyester film (Cosmo Shine (TM) A4100, manufactured by Toyobo Corporation) was used, and the non-releasable adhesive layer surface was used as the release surface. Moreover, the non-release surface was previously corona-treated and the peeling force was adjusted.

(polarizer)

(1) PVA polarizer transfer laminate

As a thermoplastic resin substrate, polyethylene terephthalate having an intrinsic viscosity of 0.62 dl/d was melted and kneaded in an extruder, and then extruded into a sheet on a cooling roll to prepare an unstretched film having a thickness of 100 µm. An aqueous solution of polyvinyl alcohol having a polymerization degree of 2400 and a saponification degree of 99.9 mol% was applied to one side of the unstretched film and dried to form a PVA layer.

The obtained laminate was stretched twice in the longitudinal direction between rolls having different peripheral speeds at 120°C and wound up. Next, the resulting laminate was treated with a 4% aqueous boric acid solution for 30 seconds, then immersed in a mixed aqueous solution of iodine (0.2%) and potassium iodide (1%) for 60 seconds to dye, and then potassium iodide (3%) ) and a mixed aqueous solution of boric acid (3%) for 30 seconds.

Further, this laminate was uniaxially stretched in the longitudinal direction in a mixed aqueous solution of boric acid (4%) and potassium iodide (5%) at 72°C, and then washed with a 4% aqueous potassium iodide solution, and the aqueous solution was removed with an air knife. After drying in 80 degreeC oven, both ends were slitted and wound up, and the laminated body for PVA polarizer transcription|transfer of width 50cm and length 1000m was obtained. The draw ratio of the total was 6.5 times, and the thickness of the PVA polarizer was 5 micrometers. In addition, the thickness was read by embedding the laminated body for PVA polarizer transcription|transfer in an epoxy resin, cutting out a section, and observing with an optical microscope. This PVA polarizer was described as PVA (transfer) in Table 1.

(2) liquid crystal polarizer

Description of paragraph [0134] of Japanese Patent Application Laid-Open No. 2007-510946 and Lub et al. Recl. Trav. Chim. The following compounds (d) and (e) were synthesized according to Pays-Bas, 115, 321-328 (1996).

[Formula 3]

[Formula 4]

According to Example 1 of Japanese Patent Application Laid-Open No. 63-301850, the following dye (f) was synthesized.

[Formula 5]

The following dye (g) was synthesized according to Example 2 of Japanese Patent Application Laid-Open No. 5-49710.

[Formula 6]

The following dye (h) was synthesize|combined according to the manufacturing method of the compound of general formula (1) of Unexamined-Japanese-Patent No. 63-1357.

[Formula 7]

(d) 75 parts by mass, (e) 25 parts by mass, (f) 2.5 parts by mass, (g) 2.5 parts by mass, (h) 2.5 parts by mass, IRGACURE (trademark) 369E (manufactured by BASF) 6 parts by mass, and 250 mass parts of ortho-xylene was mixed and melt|dissolved, and the coating material for liquid crystal polarizers was produced. The liquid crystal polarizer obtained by coating this coating material was described as liquid crystal coating in Table 1.

(Example 1)

The low-refractive-index layer paint was applied to the corona-treated surface of the 50 cm-wide releasable film, dried at 90° C. in an oven to evaporate the solvent, and then irradiated with ultraviolet rays to form a low-refractive-index layer with a thickness of 0.5 μm. Furthermore, after apply|coating the coating material for hard-coat layer on the low-refractive-index layer, drying at 90 degreeC in oven, and evaporating a solvent, it irradiated with ultraviolet-ray and formed the hard-coat layer with a thickness of 3 micrometers. Subsequently, an acrylic ultraviolet curing adhesive is applied to the hard coat layer surface, overlapped with the polarizer surface (PVA surface) of the PVA polarizer transfer laminate, and the adhesive is cured by irradiating ultraviolet rays from the release film surface to cure the polarizer transfer laminate (LPPVA0) was obtained. It wound up as a roll film of length 1000m.

(Example 2)

The polarizer transfer laminate (LPPVA0) obtained in Example 1 was cut to a length of 70 cm, the thermoplastic resin substrate was peeled off, a paint for an orientation control layer was applied to this surface, dried at 100° C., and an orientation having a thickness of 0.5 μm A control layer was installed. Further, the orientation control layer was treated with a rubbing roll in which a nylon raised cloth was wound. The rubbing direction was performed in the flow direction of the film. Then, after apply|coating the coating material A for retardation layer to the surface which performed the rubbing process, it heated at 125 degreeC for 3 minutes, and while evaporating a solvent, the discotic liquid crystalline compound was orientated. Then, the ultraviolet-ray was irradiated for 30 second in 80 degreeC environment, and the laminated body for polarizer transcription|transfer (LPPVA1) was obtained.

(Example 3)

In the same manner as in Example 2, an orientation-controlling layer was provided, and the orientation-controlling layer was treated with a rubbing roll wound with a nylon raised cloth. The rubbing direction was performed in a direction orthogonal to the flow direction of the film. Then, after apply|coating the coating material B for retardation layer, while heating at 110 degreeC for 3 minute(s), while evaporating a solvent, the rod-shaped liquid crystalline compound was orientated. Furthermore, the ultraviolet-ray was irradiated for 30 second in 110 degreeC environment, and the laminated body for polarizer transcription|transfer (LPPVA2) was obtained.

(Example 4)

Except having made the rubbing direction with respect to an orientation control layer 45 degree|times with respect to the flow direction of a film, it carried out similarly to Example 3, and obtained the laminated body for polarizer transcription|transfer (LPPVA3).

(Example 5)

(Production of a laminate for retardation layer transfer)

As the releasability substrate, a polyester film having a width of 50 cm and a thickness of 38 µm (Cosmo Shine (TM) A4100 manufactured by Toyobo Corporation) was used. The paint for an orientation control layer was apply|coated to the non- easily adhesive layer surface of a releasable base material, and it dried at 100 degreeC, and provided the orientation control layer of 0.5 micrometer in thickness. Further, the orientation control layer was treated with a rubbing roll in which a nylon raised cloth was wound. The rubbing was performed so that the film was obliquely hung on the rubbing roll, the direction of the rubbing roll, the running speed of the film, and the rotation speed of the rubbing roll were adjusted so that the rubbing direction was 45 degrees with respect to the flow direction of the film. Then, after apply|coating the coating material B for retardation layer, while heating at 110 degreeC for 3 minute(s), while evaporating a solvent, the rod-shaped liquid crystalline compound was orientated. Furthermore, the ultraviolet-ray was irradiated for 30 second in 110 degreeC environment, and the 200-m length laminated body for retardation layer transcription|transfer was obtained.

After unwinding the polarizer transfer laminate (LPPVA0) obtained in Example 1 and the retardation layer transfer laminate, the polarizer surface of LPPVA0 and the retardation layer surface of the retardation layer transfer laminate were bonded using a UV curable adhesive. It wound up and obtained the 200m-length laminated body for polarizer transcription|transfer (LPPVA4).

(Example 6)

A low-refractive-index layer paint was applied to the corona-treated surface of the release film, dried in an oven at 90° C. to evaporate the solvent, and then irradiated with ultraviolet rays to form a low-refractive-index layer with a thickness of 86 nm. Furthermore, the coating material for high refractive index layer was apply|coated on the low-refractive-index layer, and after drying at 90 degreeC in oven and evaporating a solvent, it irradiated with ultraviolet-ray, and formed the high refractive index layer with a thickness of 130 nm. In addition, thickness was measured using the ellipsometer (The Horiba Seisakusho make, automatic thin film measuring device Smart SE). Then, it carried out similarly to Example 1, the hard-coat layer and a polarizer were installed, and the laminated body for polarizer transcription|transfer was obtained. Moreover, the retardation layer was provided similarly to Example 4, and the laminated body for polarizer transcription|transfer (LPPVA5) was obtained.

(Example 7)

On one side of a polyester film with a width of 50 cm (Cosmo Shine (TM) A4300 manufactured by Toyobo Co., Ltd.) is coated with an uneven transfer paint, and cured by heating at 160°C for 3 minutes to install a cured film with a coating amount of 1.0 g/m2 did. The cured film had an uneven structure (Ra 0.7 µm) derived from particles on the surface.

Except having made the film which has this obtained cured film into a release film, it carried out similarly to Example 1, the low-refractive-index layer, a hard-coat layer, and a polarizer were provided on the cured film surface, and the laminated body for polarizer transcription|transfer (LPPVA6) was obtained.

(Example 8)

On the retardation layer of the polarizer transfer laminate (LPPVA2) obtained in Example 3, the coating material for the interlayer protective coating layer was applied and dried, followed by irradiation with ultraviolet rays to provide an interlayer protective coating layer having a dry film thickness of 0.5 µm. Then, after coating and drying the paint C for the retardation layer, ultraviolet rays were irradiated at 38°C for 80 seconds to obtain a retardation layer in which the liquid crystal compound was vertically aligned.

(Example 9)

The film on which the low refractive index layer and the hard coat layer produced in Example 1 were laminated was cut to a length of 70 cm, the hard coat layer surface was rubbed in the longitudinal direction, and a liquid crystal polarizing film paint was applied to the rubbing treatment surface. Furthermore, it dried at 110 degreeC for 3 minute(s), formed the film|membrane with a thickness of 2 micrometers, and irradiated with ultraviolet-ray successively, and obtained the laminated body for polarizer transcription|transfer (LPLC0).

(Example 10)

Example 3 except that the polarizer transfer laminate (LPLC0) obtained in Example 9 was used instead of the polarizer transfer laminate (LPPVA0), and that the rubbing direction of the orientation control layer was 45 degrees with respect to the flow direction of the film It carried out similarly, and obtained the laminated body for polarizer transcription|transfer (LPLC1).

(Example 11)

In the same manner as in Example 10, an orientation control layer was provided, and coating liquid D for a liquid crystal retardation layer was applied on the orientation control layer subjected to rubbing treatment, dried at 120° C. The compounds were oriented. Then, the laminated body (LPLC2) for polarizer transcription|transfer was obtained by irradiating an ultraviolet-ray, hardening an application layer, and producing the retardation layer with a thickness of 1.8 micrometers.

(Example 12)

Instead of the film in which the low refractive index layer and the hard coat layer prepared in Example 1 were laminated, the low refractive index layer, the high refractive index layer, and the hard coat layer prepared in Example 6 were used except that the film laminated with the hard coat layer was used. Similarly, the laminated body for polarizer transcription|transfer (LPLC3) was obtained.

Table 1 shows the layer structures of Examples 1 to 12.

[Table 1]

(Evaluation in liquid crystal display)

Peel off the viewing side polarizing plate and the light source side polarizing plate of each commercially available liquid crystal display cell type (IPS, VA, TN), cut out the polarizer transfer layered product to the size of the liquid crystal display cell, and paste it using an optical adhesive It was put together, and the releasability film of the laminated body for polarizer transcription|transfer was peeled after that. Bonding made the absorption axis of the polarizing plate of the original liquid crystal display device and the absorption axis of the laminated body for polarizer transcription|transfer become the same direction. In addition, LPPVA4 peeled the releasability base material of the laminated body for retardation layer transcription|transfer just before bonding with a liquid crystal cell.

(image displayability)

When a landscape painting was displayed on a liquid crystal display device and the display state of the image was observed from the front, images of the same quality as that of the original display device were all displayed.

(Viewing Angle Characteristics)

The image was observed by moving it in each direction from the front toward the up-down, left-right, upper-right, and lower-right directions. In the IPS and VA type liquid crystal cells, LPPVA0 is used on both the viewing side and the light source side, and in the TN type liquid crystal cell, when LPPVA0 is used on both the viewing side and the light source side, there is an effect of improving the viewing angle. (circle), when it did not change, it was set as X.

(beam)

The illuminating state of the fluorescent lamp was observed from the liquid crystal display device in an oblique direction (in a state in which the indoor fluorescent lamp is illuminated by an inclination of about 45 degrees from the normal direction). The non-peelable adhesive layer side of a 50 μm thick polyester film (Cosmo Shine (TM) A4100, manufactured by Toyobo Corporation) was placed on the liquid crystal display device, and compared with the see-through of the polyester film side, all were less see-through. .

(scratches)

After 50 reciprocating rubbing of a liquid crystal display screen with steel wool, peeling of a polarizer was observed, but peeling of a polarizer was not observed and it was excellent also in flaw property.

Table 2 shows the summary of the evaluation results in the liquid crystal display device.

[Table 2]

(Evaluation in organic EL display device)

The circularly polarizing plate of a commercially available organic EL display device is peeled off, and the polarizer transfer laminate is cut out to the size of a liquid crystal display cell instead, and is bonded using an optical adhesive, and then the release film of the polarizer transfer laminate is peeled off did. Bonding made the absorption axis of the circularly-polarizing plate of the original display device and the absorption axis of the laminated body for polarizer transcription|transfer become the same direction.

(anti-reflection properties)

The screen was observed with a fluorescent lamp coming from the back in the room, and the antireflection effect was confirmed. In all cases, the antireflection effect equivalent to that of the original organic EL display device was recognized.

(beam)

The illuminating state of the fluorescent lamp was observed by tilting the organic EL display device from the oblique direction (in a state in which the indoor fluorescent lamp is illuminated by tilting about 45 degrees from the normal direction). On the organic EL display device, the non-peelable adhesive layer side of a 50 µm thick polyester film (Cosmo Shine (TM) A4100, manufactured by Toyobo Co., Ltd.) was placed face up, wrote

(scratches)

After 50 reciprocating rubbing of an organic electroluminescent display screen with steel wool, peeling of a polarizer was observed, but peeling of a polarizer was not observed and it was excellent also in flaw property.

Table 3 shows the summary of the evaluation results in the organic EL display device.

[Table 3]

Claims (10)

A step of laminating a polarizer transfer laminate LP1 on at least one side of the image display cell so that the polarizer of the polarizer transfer laminate LP1 in which a coating layer and a polarizer are laminated in this order on a release film is disposed on the image display cell side; A method of manufacturing an image display device. (A) On one side of the image display cell, a polarizer transfer laminate LP1 is laminated so that the polarizer of the polarizer transfer laminate LP1 in which a coating layer and a polarizer are laminated in this order on a release film is arranged on the image display cell side process, and
(B) on the other side of the image display cell, laminating the polarizer transfer laminate LP2 so that the polarizer of the polarizer transfer laminate LP2 in which the polarizer is laminated on the release film is arranged on the image display cell side; , a method of manufacturing an image display device. 3. The method of claim 1 or 2,
The manufacturing method of the image display apparatus in which laminated body LP1 for polarizer transcription|transfer has retardation layer on the opposite side to the coating layer of a polarizer. 4. The method according to claim 2 or 3,
The manufacturing method of the image display apparatus in which laminated body LP2 for polarizer transcription|transfer has retardation layer on the opposite side to the releasability film of a polarizer. 5. The method according to any one of claims 2 to 4,
The manufacturing method of the image display apparatus in which laminated body LP2 for polarizer transcription|transfer has a coating layer between a releasable film and a polarizer. 6. The method according to any one of claims 1 to 5,
The manufacturing method of the image display apparatus in which a coating layer contains any of a hard-coat layer, a reflection reduction layer, and an antistatic layer. 7. The method according to any one of claims 1 to 6,
A method for manufacturing an image display device, wherein the image display cell is a liquid crystal display cell. 7. The method of any one of claims 1, 3, and 6,
The manufacturing method of the image display apparatus whose image display cell is an organic electroluminescent display cell. A laminate for polarizer transfer in which a coating layer and a polarizer are laminated in this order on a release film. 10. The method of claim 9,
The laminated body for polarizer transcription|transfer which further has a retardation layer on the opposite side to the coating layer of a polarizer.