WO2019203008A1 - 位相差層付き偏光板および有機ｅｌ表示装置 - Google Patents

位相差層付き偏光板および有機ｅｌ表示装置 Download PDF

Info

Publication number
WO2019203008A1
WO2019203008A1 PCT/JP2019/014960 JP2019014960W WO2019203008A1 WO 2019203008 A1 WO2019203008 A1 WO 2019203008A1 JP 2019014960 W JP2019014960 W JP 2019014960W WO 2019203008 A1 WO2019203008 A1 WO 2019203008A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarizing plate
layer
retardation layer
weight
sensitive adhesive
Prior art date
Application number
PCT/JP2019/014960
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
昌邦 藤田
悟士 山本
丈治 喜多川
雄祐 外山
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to CN201980020646.7A priority Critical patent/CN111886526A/zh
Priority to KR1020207025303A priority patent/KR20210002457A/ko
Publication of WO2019203008A1 publication Critical patent/WO2019203008A1/ja

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38—Pressure-sensitive adhesives [PSA]
    • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385—Acrylic polymers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3016—Polarising elements involving passive liquid crystal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements

Definitions

  • the present invention relates to a polarizing plate with a retardation layer and an organic EL display device.
  • organic EL display devices In recent years, along with the widespread use of thin displays, image display devices (organic EL display devices) equipped with organic EL panels have been proposed.
  • the organic EL panel has a highly reflective metal layer, and is likely to cause problems such as external light reflection and background reflection. Therefore, it is known to prevent these problems by providing a polarizing plate with a retardation layer (circular polarizing plate) on the viewing side.
  • a polarizing plate with a retardation layer circular polarizing plate
  • the retardation layer is cracked in a high temperature environment. May occur.
  • the present invention has been made to solve the above-described conventional problems, and its main purpose is to provide a polarizing plate with a retardation layer that suppresses the generation of cracks in the retardation layer under a high-temperature environment, and such a polarizing plate.
  • An object of the present invention is to provide an organic EL display device using a polarizing plate with a retardation layer.
  • the polarizing plate with a retardation layer of the present invention has a polarizing plate, a first retardation layer, a pressure-sensitive adhesive layer, and a second retardation layer in this order, and the first retardation layer and The second retardation layer contains a liquid crystal compound, and the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer contains 0.05 parts by weight or more of an isocyanate crosslinking agent with respect to 100 parts by weight of the base polymer.
  • the base polymer is a (meth) acrylic polymer.
  • the base polymer includes a carboxyl group-containing monomer as a monomer component.
  • the adhesive which comprises the said adhesive layer further contains a ultraviolet absorber.
  • the ultraviolet absorber has 0 to 3 hydroxyl groups in the molecular structure.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer further contains a dye compound that exists in a wavelength region having a maximum absorption wavelength of an absorption spectrum of 380 nm to 430 nm.
  • an organic EL display device is provided. This organic EL display device has the above polarizing plate with a retardation layer.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer disposed between the two retardation layers contains 0.05 parts by weight or more of the isocyanate cross-linking agent with respect to 100 parts by weight of the base polymer. It was possible to realize a polarizing plate with a retardation layer that suppressed the occurrence of cracks in the retardation layer under the environment.
  • FIG. 1 is a schematic cross-sectional view of a polarizing plate with a retardation layer according to one embodiment of the present invention.
  • the retardation layer-attached polarizing plate 100 includes a polarizing plate 10, a first retardation layer 20, an adhesive layer 30, and a second retardation layer 40 in this order. That is, the first retardation layer 20 and the second retardation layer 40 are laminated via the pressure-sensitive adhesive layer 30.
  • the first retardation layer 20 and the second retardation layer 40 are configured to include a liquid crystal compound.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 30 contains 0.05 parts by weight or more of an isocyanate crosslinking agent with respect to 100 parts by weight of the base polymer.
  • Another pressure-sensitive adhesive layer 50 may be laminated on the opposite side of the second retardation layer 40 from the pressure-sensitive adhesive layer 30. Thereby, for example, bonding to an organic EL panel becomes easy.
  • the base polymer of the pressure-sensitive adhesive is preferably a (meth) acrylic polymer.
  • the base polymer of the pressure-sensitive adhesive preferably contains a carboxyl group-containing monomer as a monomer component.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 30 further includes an ultraviolet absorber.
  • the ultraviolet absorber preferably has 0 to 3 hydroxyl groups in the molecular structure.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 30 further includes a dye compound that exists in a wavelength region having a maximum absorption wavelength of an absorption spectrum of 380 nm to 430 nm. According to said structure, the ultraviolet-ray absorption function can be provided to the adhesive layer 30, and this suppresses deterioration of the organic EL element at the time of using a polarizing plate with a phase difference layer for an organic EL display apparatus. Can do.
  • the polarizing plate 10 typically has a polarizer, a first protective layer disposed on one side of the polarizer, and a second protective layer disposed on the other side of the polarizer. .
  • the polarizer is typically an absorptive polarizer.
  • One of the first protective layer and the second protective layer may be omitted.
  • the resin film forming the polarizer may be a single-layer resin film or a laminate of two or more layers.
  • polarizers composed of a single-layer resin film include hydrophilic polymer films such as polyvinyl alcohol (PVA) films, partially formalized PVA films, and ethylene / vinyl acetate copolymer partially saponified films.
  • PVA polyvinyl alcohol
  • polyene-based oriented films such as those subjected to dyeing treatment and stretching treatment with dichroic substances such as iodine and dichroic dyes, PVA dehydrated products and polyvinyl chloride dehydrochlorinated products.
  • a polarizer obtained by dyeing a PVA film with iodine and uniaxially stretching is used because of excellent optical properties.
  • the dyeing with iodine is performed, for example, by immersing a PVA film in an aqueous iodine solution.
  • the stretching ratio of the uniaxial stretching is preferably 3 to 7 times.
  • the stretching may be performed after the dyeing treatment or may be performed while dyeing. Moreover, you may dye
  • the PVA film is subjected to swelling treatment, crosslinking treatment, washing treatment, drying treatment and the like. For example, by immersing the PVA film in water and washing it before dyeing, not only can the surface of the PVA film be cleaned of dirt and anti-blocking agents, but the PVA film can be swollen to cause uneven staining. Can be prevented.
  • a polarizer obtained by using a laminate a laminate of a resin substrate and a PVA resin layer (PVA resin film) laminated on the resin substrate, or a resin substrate and the resin
  • a polarizer obtained by using a laminate with a PVA resin layer applied and formed on a substrate examples thereof include a polarizer obtained by using a laminate with a PVA resin layer applied and formed on a substrate.
  • a polarizer obtained by using a laminate of a resin base material and a PVA resin layer applied and formed on the resin base material may be obtained by, for example, applying a PVA resin solution to a resin base material and drying it.
  • a PVA-based resin layer is formed thereon to obtain a laminate of a resin base material and a PVA-based resin layer; the laminate is stretched and dyed to make the PVA-based resin layer a polarizer; obtain.
  • stretching typically includes immersing the laminate in an aqueous boric acid solution and stretching.
  • the stretching may further include, if necessary, stretching the laminate in the air at a high temperature (for example, 95 ° C. or higher) before stretching in the aqueous boric acid solution.
  • the obtained resin base material / polarizer laminate may be used as it is (that is, the resin base material may be used as a protective layer of the polarizer), and the resin base material is peeled from the resin base material / polarizer laminate.
  • Any appropriate protective layer according to the purpose may be laminated on the release surface. Details of a method for manufacturing such a polarizer are described in, for example, Japanese Patent Application Laid-Open No. 2012-73580. This publication is incorporated herein by reference in its entirety.
  • the thickness of the polarizer is, for example, 1 ⁇ m to 35 ⁇ m. In one embodiment, the thickness of the polarizer is preferably 1 ⁇ m to 15 ⁇ m, more preferably 3 ⁇ m to 10 ⁇ m, and particularly preferably 3 ⁇ m to 8 ⁇ m. When the thickness of the polarizer is in such a range, curling during heating can be satisfactorily suppressed, and good appearance durability during heating can be obtained.
  • the first and second protective layers are formed of any suitable protective film that can be used as a film for protecting the polarizer.
  • suitable protective film include cellulose resins such as triacetyl cellulose (TAC), polyester-based, polyvinyl alcohol-based, polycarbonate-based, polyamide-based, polyimide-based, polyethersulfone-based, and polysulfone-based materials.
  • transparent resins such as those based on polystyrene, polystyrene, polynorbornene, polyolefin, (meth) acryl, and acetate.
  • thermosetting resins such as (meth) acrylic, urethane-based, (meth) acrylurethane-based, epoxy-based, and silicone-based or ultraviolet curable resins are also included.
  • a glassy polymer such as a siloxane polymer is also included.
  • a polymer film described in JP-A-2001-343529 (WO01 / 37007) can also be used.
  • a resin composition containing a thermoplastic resin having a substituted or unsubstituted imide group in the side chain and a thermoplastic resin having a substituted or unsubstituted phenyl group and nitrile group in the side chain for example, a resin composition having an alternating copolymer of isobutene and N-methylmaleimide and an acrylonitrile / styrene copolymer can be mentioned.
  • the polymer film can be, for example, an extruded product of the resin composition.
  • the thickness of the protective film is preferably 10 ⁇ m to 100 ⁇ m.
  • the protective film may be laminated to the polarizer via an adhesive layer (specifically, an adhesive layer or an adhesive layer), or may be adhered to the polarizer (without an adhesive layer). Good.
  • the adhesive layer is formed of any appropriate adhesive.
  • the water-soluble adhesive agent which has a polyvinyl alcohol-type resin as a main component is mentioned, for example.
  • the water-soluble adhesive mainly composed of a polyvinyl alcohol-based resin can preferably further contain a metal compound colloid.
  • the metal compound colloid can be one in which metal compound fine particles are dispersed in a dispersion medium, and can be electrostatically stabilized due to mutual repulsion of the same kind of charge of the fine particles, and can have permanent stability. .
  • the average particle size of the fine particles forming the metal compound colloid can be any appropriate value as long as it does not adversely affect the optical properties such as polarization properties.
  • the thickness is preferably 1 nm to 100 nm, more preferably 1 nm to 50 nm. This is because the fine particles can be uniformly dispersed in the adhesive layer, the adhesion can be ensured, and the nick can be suppressed.
  • the “knic” refers to a local uneven defect generated at the interface between the polarizer and the protective film.
  • the pressure-sensitive adhesive layer is composed of any appropriate pressure-sensitive adhesive.
  • the first and second retardation layers include a liquid crystal compound.
  • the first and second retardation layers can be constituted by an alignment solidified layer of a liquid crystal composition containing a liquid crystal compound.
  • the “alignment solidified layer” refers to a layer in which a liquid crystal compound is aligned in a predetermined direction in the layer and the alignment state is fixed.
  • the alignment solidified layer of the liquid crystal compound is subjected to an alignment treatment on the surface of a predetermined substrate, and a coating liquid containing the liquid crystal compound is applied to the surface to align the liquid crystal compound in a direction corresponding to the alignment treatment, It can be formed by fixing the alignment state.
  • the substrate is any suitable resin film
  • the alignment solidified layer formed on the substrate can be transferred to the surface of the other layer constituting the polarizing plate with a retardation layer.
  • Specific examples of the liquid crystal compound and details of the method of forming the alignment solidified layer are described in JP-A No. 2006-163343. The description in this publication is incorporated herein by reference.
  • the in-plane retardation Re (550) of the first retardation layer is preferably 200 nm to 300 nm
  • the in-plane retardation Re (550) of the second retardation layer is preferably Is between 100 nm and 150 nm. Therefore, in this case, the first retardation layer can function as a ⁇ / 2 plate, and the second retardation layer can function as a ⁇ / 4 plate.
  • the angle formed between the absorption axis of the polarizer and the slow axis of the first retardation layer is preferably 5 ° to 25 °, and particularly preferably about 15 °.
  • the angle formed between the absorption axis of the polarizer and the slow axis of the second retardation layer is preferably 65 ° to 85 °, particularly preferably about 75 °.
  • the angle formed between the absorption axis of the polarizer and the slow axis of the first retardation layer is preferably 39 ° to 51 °, particularly preferably about 45 °.
  • the first retardation layer may be constituted by an alignment solidified layer of a liquid crystalline composition containing a discotic liquid crystal compound aligned substantially vertically.
  • the “discotic liquid crystal compound” has a disc-shaped mesogenic group in the molecular structure, and 2 to 8 side differences in the mesogenic group are radially formed by an ether bond or an ester bond. This is what is connected.
  • the thickness of the first retardation layer can be set so as to obtain a desired in-plane retardation, and is preferably 1 ⁇ m to 20 ⁇ m, more preferably 1 ⁇ m to 12 ⁇ m.
  • the liquid crystalline composition containing the above discotic liquid crystal compound is not particularly limited as long as it contains a discotic liquid crystal compound and exhibits liquid crystallinity.
  • the content of the discotic liquid crystal compound in the liquid crystal composition is preferably 40 parts by weight or more and less than 100 parts by weight with respect to 100 parts by weight of the total solid content of the liquid crystal composition.
  • a retardation film comprising an alignment solidified layer of a liquid crystalline composition containing a substantially vertically aligned discotic liquid crystal compound can be obtained by the method described in JP-A-2001-56411.
  • the first retardation layer may be composed of an alignment solidified layer in which rod-like liquid crystal compounds are aligned in a state of being aligned in the slow axis direction of the retardation layer (homogeneous alignment).
  • the liquid crystal compound include a liquid crystal compound (nematic liquid crystal) whose liquid crystal phase is a nematic phase.
  • a liquid crystal compound for example, a liquid crystal polymer or a liquid crystal monomer can be used.
  • the liquid crystal compound may exhibit liquid crystallinity either lyotropic or thermotropic.
  • the liquid crystal monomer is preferably a polymerizable monomer and a crosslinkable monomer.
  • the thickness of the first retardation layer can be set so as to obtain a desired in-plane retardation, and is preferably 1 ⁇ m to 10 ⁇ m, more preferably 1 ⁇ m to 6 ⁇ m.
  • the second retardation layer that can function as a ⁇ / 4 plate can be formed by the materials and methods described in the above section C-1 for the first retardation layer.
  • the second retardation layer has the following chemical formula (I) (numbers 65 and 35 in the formula indicate mol% of the monomer unit, and are represented by a block polymer body for convenience: weight average) A side chain type liquid crystal polymer represented by a molecular weight of 5000) and a polymerizable liquid crystal exhibiting a nematic liquid crystal phase.
  • the adhesive contains 0.05 parts by weight or more of an isocyanate crosslinking agent with respect to 100 parts by weight of the base polymer, and preferably further contains an ultraviolet absorber and / or a dye compound.
  • the thickness of the pressure-sensitive adhesive layer is, for example, 2 ⁇ m to 50 ⁇ m, preferably 5 ⁇ m to 30 ⁇ m.
  • the gel fraction of the pressure-sensitive adhesive layer is preferably 40% to 95%, more preferably 50% to 95%, still more preferably 65% to 93%, and particularly preferably 80% to 93%. Yes, most preferably 85 to 93%.
  • the gel fraction immediately after forming the pressure-sensitive adhesive layer is preferably 60% or more, more preferably 63% or more, and 66% or more from the viewpoint of preventing appearance defects such as glue marks. It is more preferable that it is 70% or more.
  • Base polymer Any appropriate polymer can be adopted as the base polymer as long as the required adhesiveness and tackiness can be exhibited.
  • Specific examples of the base polymer include (meth) acrylic polymers and rubber polymers.
  • the base polymer is a (meth) acrylic polymer.
  • (Meth) acrylic polymer contains alkyl (meth) acrylate as a main component as a monomer unit.
  • alkyl (meth) acrylate examples include those having a linear or branched alkyl group having 1 to 24 carbon atoms at the ester terminal.
  • Alkyl (meth) acrylate can be used individually by 1 type or in combination of 2 or more types. “Alkyl (meth) acrylate” refers to alkyl acrylate and / or alkyl methacrylate.
  • the alkyl (meth) acrylate having an alkyl group having 1 to 24 carbon atoms at the ester end is preferably 40% by weight or more based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer, More preferably, it is more than 60% by weight.
  • the monomer component may contain a copolymerization monomer other than alkyl (meth) acrylate as a monofunctional monomer component.
  • a copolymerization monomer can be used as the remainder of the alkyl (meth) acrylate in a monomer component.
  • a cyclic nitrogen-containing monomer may be included.
  • said cyclic nitrogen containing monomer what has a polymerizable functional group which has unsaturated double bonds, such as a (meth) acryloyl group or a vinyl group, and has a cyclic nitrogen structure can be especially used without a restriction
  • the cyclic nitrogen structure preferably has a nitrogen atom in the cyclic structure.
  • the content of the cyclic nitrogen-containing monomer is preferably 0.5 to 50% by weight, more preferably 0.5 to 40% by weight, based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer. %, Even more preferably 0.5 to 30% by weight.
  • the monomer component forming the (meth) acrylic polymer may include other functional group-containing monomers.
  • examples of such a monomer include a carboxyl group-containing monomer and a monomer having a cyclic ether group.
  • the content is preferably 0.05 to 10% by weight, more preferably 0.1 to 8% by weight, and further preferably 0.2 to 6% by weight. .
  • the gel fraction of the pressure-sensitive adhesive layer can be set to a value within a preferable range, and as a result, generation of cracks in the retardation layer can be suppressed.
  • the monomer component may include a hydroxyl group-containing monomer.
  • a hydroxyl group-containing monomer a monomer having a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group and having a hydroxyl group can be used without particular limitation.
  • the content of the hydroxyl group-containing monomer is preferably 0.08% by weight or more based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer, from the viewpoint of enhancing the adhesive force and cohesive force. More preferably, it is 0.3% by weight or more, and further preferably 1% by weight or more.
  • the upper limit of the content of the hydroxyl group-containing monomer is preferably 30% by weight, more preferably 27% by weight, based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer, More preferably, it is 25% by weight. If the amount of the hydroxyl group-containing monomer is too large, the pressure-sensitive adhesive layer becomes hard, the adhesive force may be reduced, and the viscosity of the pressure-sensitive adhesive may become too high.
  • the monomer component that forms the (meth) acrylic polymer contains any appropriate multifunctional monomer as necessary to adjust the cohesive strength of the pressure-sensitive adhesive. can do.
  • (Meth) acrylic polymers having a weight average molecular weight in the range of 500,000 to 3,000,000 are usually used. In view of durability, particularly heat resistance, it is preferable to use those having a weight average molecular weight of 700,000 to 2,700,000. Further, it is preferably 800,000 to 2.5 million. A weight average molecular weight of less than 500,000 is not preferable in terms of heat resistance. On the other hand, if the weight average molecular weight is more than 3 million, a large amount of a diluting solvent is required to adjust the viscosity to be suitable for coating, which is not preferable.
  • the weight average molecular weight is a value measured by GPC (gel permeation chromatography) and calculated in terms of polystyrene.
  • the (meth) acrylic polymer As a method for producing the (meth) acrylic polymer, any appropriate method such as radiation polymerization such as solution polymerization, ultraviolet (UV) polymerization, various radical polymerizations such as bulk polymerization and emulsion polymerization can be employed. Further, the (meth) acrylic polymer obtained may be any of a random copolymer, a block copolymer, a graft copolymer, and the like.
  • polymerization can be carried out by appropriately adding a polymerization initiator, a chain transfer agent, an emulsifier and the like used for radical polymerization to the monomer component.
  • the polymerization initiator, chain transfer agent, emulsifier and the like used for radical polymerization are not particularly limited and can be appropriately selected and used.
  • the weight average molecular weight of a (meth) acrylic-type polymer can be controlled by the usage-amount of a polymerization initiator and a chain transfer agent, and reaction conditions, and the usage-amount is suitably adjusted according to these kinds.
  • the (meth) acrylic polymer When the (meth) acrylic polymer is produced by radiation polymerization, it can be produced by polymerizing the monomer component by irradiating the monomer component with radiation such as an electron beam or ultraviolet rays (UV). Among these, ultraviolet polymerization is preferable. When performing the ultraviolet polymerization, it is preferable to contain a photopolymerization initiator in the monomer component because of the advantage that the polymerization time can be shortened.
  • photoinitiator Although it does not specifically limit as a photoinitiator, It is preferable that it is a photoinitiator which has an absorption band in wavelength 400nm or more.
  • a photopolymerization initiator examples include bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (manufactured by BASF, product name “Irgacure 819”), and 2,4,6-trimethylbenzoyl-diphenyl-phosphine.
  • fin oxide manufactured by BASF, “LUCIRIN TPO”.
  • the photopolymerization initiator can contain a photopolymerization initiator having an absorption band at a wavelength of less than 400 nm.
  • a photopolymerization initiator is not particularly limited as long as it generates radicals by ultraviolet rays and initiates photopolymerization and has an absorption band at a wavelength of less than 400 nm. Any agent can be suitably used.
  • benzoin ether photopolymerization initiator acetophenone photopolymerization initiator, ⁇ -ketol photopolymerization initiator, photoactive oxime photopolymerization initiator, benzoin photopolymerization initiator, benzyl photopolymerization initiator, benzophenone A photopolymerization initiator, a ketal photopolymerization initiator, a thioxanthone photopolymerization initiator, an acylphosphine oxide photopolymerization initiator, or the like can be used.
  • the content of the isocyanate crosslinking agent with respect to 100 parts by weight of the base polymer is preferably 0.1 to 12 parts by weight.
  • the lower limit of the content of the isocyanate crosslinking agent with respect to 100 parts by weight of the base polymer is preferably 0.5 parts by weight, more preferably 1 part by weight, and particularly preferably 2 parts by weight. Thereby, generation
  • the upper limit of the content of the isocyanate crosslinking agent with respect to 100 parts by weight of the base polymer is preferably 8 parts by weight, more preferably 5 parts by weight. Thereby, the cloudiness of an adhesive layer can be suppressed.
  • the isocyanate cross-linking agent refers to a compound having two or more isocyanate groups (including an isocyanate regenerating functional group in which the isocyanate group is temporarily protected by a blocking agent or quantification) in one molecule.
  • the isocyanate crosslinking agent include aromatic isocyanates such as tolylene diisocyanate and xylene diisocyanate, alicyclic isocyanates such as isophorone diisocyanate, and aliphatic isocyanates such as hexamethylene diisocyanate. Tolylene diisocyanate is preferable. This is because the gel fraction of the pressure-sensitive adhesive layer can be increased.
  • lower aliphatic polyisocyanates such as butylene diisocyanate and hexamethylene diisocyanate
  • alicyclic isocyanates such as cyclopentylene diisocyanate, cyclohexylene diisocyanate and isophorone diisocyanate
  • 2,4-tolylene diisocyanate Aromatic diisocyanates such as 4,4′-diphenylmethane diisocyanate, xylene diisocyanate, polymethylene polyphenyl isocyanate, trimethylolpropane / tolylene diisocyanate trimer adduct (product name “Coronate L” manufactured by Nippon Polyurethane Industry Co., Ltd.) , Trimethylolpropane / hexamethylene diisocyanate trimer adduct (manufactured by Nippon Polyurethane Industry Co., Ltd., product name “Coronate HL”), hexa Is
  • UV absorber Any appropriate ultraviolet absorber can be used as the ultraviolet absorber.
  • the ultraviolet absorber preferably has 0 to 3 hydroxyl groups in the molecular structure. Specific examples include triazine ultraviolet absorbers, benzotriazole ultraviolet absorbers, benzophenone ultraviolet absorbers, oxybenzophenone ultraviolet absorbers, salicylic acid ester ultraviolet absorbers, and cyanoacrylate ultraviolet absorbers. These can be used singly or in combination of two or more. Among these, triazine-based UV absorbers and benzotriazole-based UV absorbers are preferable, triazine-based UV absorbers having 2 or less hydroxyl groups in one molecule, and benzones having one benzotriazole skeleton in one molecule.
  • An ultraviolet absorber may be used independently and may mix and use 2 or more types.
  • the content of the ultraviolet absorber is preferably 0.1 to 20 parts by weight, more preferably 0.1 to 10 parts by weight, and still more preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the base polymer. Parts by weight, particularly preferably 0.5 to 3 parts by weight.
  • the maximum absorption wavelength of the absorption spectrum of the ultraviolet absorber is preferably in the wavelength region of 300 nm to 400 nm, more preferably in the wavelength region of 320 nm to 380 nm.
  • the maximum absorption wavelength can be measured using an ultraviolet-visible spectrophotometer.
  • ultraviolet absorber commercially available products can be suitably used, and examples include Tinosorb S (manufactured by BASF), Seesorb 106 (manufactured by Sipro Kasei Co., Ltd.), and the like.
  • the dye compound is present in the wavelength region of the absorption spectrum having a maximum absorption wavelength of 380 nm to 430 nm.
  • the maximum absorption wavelength of the absorption spectrum of the dye compound is preferably in the wavelength region of 380 nm to 420 nm.
  • the full width at half maximum of the dye compound is preferably 80 nm or less, more preferably 5 nm to 70 nm, and still more preferably 10 nm to 60 nm. Thereby, the light of the long wavelength side more than 430 nm can fully be permeate
  • the full width at half maximum of the dye compound can be measured from the transmission absorption spectrum of the solution of the dye compound under the following measurement conditions using an ultraviolet-visible spectrophotometer (manufactured by Hitachi High-Tech Science Co., Ltd., product name “U-4100”). it can.
  • the wavelength interval (full width at half maximum) between two points at 50% of the peak value is expressed as the dye compound.
  • the full width at half maximum is expressed as the dye compound.
  • the dye compound is not particularly limited as long as the compound has a maximum absorption wavelength in the absorption spectrum in the above wavelength range.
  • the dye compound include an organic dye compound and an inorganic dye compound. Among these, from the viewpoint of maintaining dispersibility and transparency in a resin component such as a base polymer, the organic dye compound is used. Is preferred.
  • organic dye compounds examples include azomethine compounds, indole compounds, cinnamic acid compounds, pyrimidine compounds, porphyrin compounds, and polymethine compounds.
  • organic dye compound commercially available compounds can be preferably used.
  • the indole compound BONASORB UA3911 (manufactured by Orient Chemical Industry Co., Ltd., absorption spectrum maximum absorption wavelength: 398 nm, half (Value range: 48 nm), BONASORB UA3912 (manufactured by Orient Chemical Industry Co., Ltd., absorption spectrum maximum absorption wavelength: 386 nm, half-value width: 53 nm), and cinnamate compounds as SOM-5-0106 (manufactured by Orient Chemical Industry Co.
  • the pressure-sensitive adhesive composition may contain other components such as a silane coupling agent, an antioxidant, an anti-aging agent, and a plasticizer as necessary.
  • a silane coupling agent examples include phenol-based, phosphorus-based, sulfur-based, and amine-based antioxidants.
  • the silane coupling agent examples include epoxy group-containing silane coupling agents such as 3-glycidoxypropyltrimethoxysilane, amino group-containing silane coupling agents such as 3-aminopropyltrimethoxysilane, and 3-acryloxypropyl.
  • Examples include (meth) acryl group-containing silane coupling agents such as trimethoxysilane, isocyanate group-containing silane coupling agents such as 3-isocyanatopropyltriethoxysilane, and acetoacetyl group-containing silane coupling agents.
  • Organic EL Display Device The polarizing plate with a retardation layer described in the above items A to D can be used in an image display device. Therefore, the present invention also includes an image display device using such an optical laminate. Typical examples of the image display device include a liquid crystal display device and an organic electroluminescence (EL) display device.
  • An image display device (organic EL display device) according to an embodiment of the present invention includes the optical layered body described in the items A to D.
  • the thickness direction retardation Rth was calculated.
  • (3) Transmittance of pressure-sensitive adhesive layer The separator of each pressure-sensitive adhesive layer obtained in Examples and Comparative Examples was peeled off, and the pressure-sensitive adhesive layer was attached to a measuring jig, and a spectrophotometer (manufactured by Hitachi High-Technologies Corporation) , Product name “U4100”). The transmittance was measured in the wavelength range of 300 nm to 450 nm.
  • ⁇ Production Example 1> (Preparation of polarizing plate) A long roll of polyvinyl alcohol film (product name “PE3000” manufactured by Kuraray Co., Ltd.) having a thickness of 30 ⁇ m is simultaneously swollen and dyed while being uniaxially stretched in the longitudinal direction so as to be 5.9 times in the longitudinal direction by a roll stretching machine. A cross-linking and cleaning treatment was performed, and finally a drying treatment was performed to produce a polarizer having a thickness of 12 ⁇ m. Specifically, the swelling treatment was stretched 2.2 times while being treated with pure water at 20 ° C. Next, the dyeing treatment is performed in an aqueous solution at 30 ° C.
  • PE3000 polyvinyl alcohol film manufactured by Kuraray Co., Ltd.
  • the weight ratio of iodine and potassium iodide is 1: 7 and the iodine concentration is adjusted so that the transmittance of the produced polarizing film is 45.0%.
  • the film was stretched 1.4 times.
  • the crosslinking treatment employed a two-stage crosslinking treatment, and the first-stage crosslinking treatment was stretched 1.2 times while being treated in an aqueous solution in which boric acid and potassium iodide were dissolved at 40 ° C.
  • the boric acid content of the aqueous solution of the first-stage crosslinking treatment was 5.0% by weight, and the potassium iodide content was 3.0% by weight.
  • the film was stretched 1.6 times while being treated in an aqueous solution in which boric acid and potassium iodide were dissolved at 65 ° C.
  • the boric acid content of the aqueous solution of the second crosslinking treatment was 4.3% by weight, and the potassium iodide content was 5.0% by weight.
  • the cleaning treatment was performed with an aqueous potassium iodide solution at 20 ° C.
  • the potassium iodide content of the aqueous solution for the washing treatment was 2.6% by weight.
  • the drying process was performed at 70 ° C. for 5 minutes to obtain a polarizer.
  • ⁇ Production Example 2> 10 g of a polymerizable liquid crystal exhibiting a nematic liquid crystal phase (manufactured by BASF, product name “Paliocolor LC242”, represented by the following formula) and a photopolymerization initiator (product name “Ciba Specialty Chemicals, product name”) 3 g of Irgacure 907 ”) was dissolved in 40 g of toluene to prepare a liquid crystal composition (coating solution). The surface of a polyethylene terephthalate (PET) film (thickness 38 ⁇ m) was rubbed with a rubbing cloth and subjected to orientation treatment.
  • PET polyethylene terephthalate
  • rubbing frequency (number of rubbing rolls) is 1, rubbing roll radius r is 76.89 mm, rubbing roll rotation speed nr is 1500 rpm, film transport speed v is 83 mm / sec, rubbing strength RS and indentation amount M was performed under five conditions (a) to (e) as shown in Table 1.
  • the direction of the orientation treatment was set to a ⁇ 75 ° direction as viewed from the viewing side with respect to the direction of the absorption axis of the polarizer when being attached to the polarizing plate.
  • the liquid coating compound was aligned by applying the coating liquid onto the alignment-treated surface with a bar coater and heating and drying at 90 ° C. for 2 minutes. Under the conditions (a) to (c), the alignment state of the liquid crystal compound was very good. Under the conditions (d) and (e), a slight disturbance occurred in the alignment of the liquid crystal compound, but the level was not problematic for practical use.
  • the liquid crystal layer thus formed was irradiated with 1 mJ / cm 2 of light using a metal halide lamp to cure the liquid crystal layer, thereby forming a retardation layer A on the PET film.
  • Example 1 Preparation of pressure-sensitive adhesive layer ⁇ Preparation of (meth) acrylic polymer (1)> In a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer and a stirrer, 99 parts of butyl acrylate, 1.0 part of 4-hydroxybutyl acrylate and 2,2′-azobisisobutyronitrile 0.3 After adding a part with ethyl acetate and making it react at 60 degreeC under nitrogen gas stream for 4 hours, ethyl acetate was added to the reaction liquid, and the solution (solid content concentration 30) containing a weight average molecular weight 1.6 million. %).
  • the pressure-sensitive adhesive composition A was applied to a separator made of a polyester film surface-treated with a silicone release agent and heat-treated at 155 ° C. for 3 minutes to obtain a pressure-sensitive adhesive layer having a thickness of 20 ⁇ m.
  • the TAC film surface of the polarizing plate and the retardation layer A are UV curable so that the angle between the absorption axis of the polarizing plate and the slow axis of the retardation layer A is 75 °. It bonded together through the adhesive agent.
  • Example 2 As a UV absorber, 2,4-bis-[ ⁇ 4- (4-ethylhexyloxy) -4-hydroxy ⁇ -phenyl] -6- (4-methoxyphenyl) -1,3,5-triazine (BASF Japan Ltd.)
  • a pressure-sensitive adhesive composition B was obtained in the same manner as in Example 1 except that 2 parts by weight (solid content weight) of the product name “Tinosorb S” and “a1” in Table 1 were added. Except having used the said adhesive composition B, it carried out similarly to Example 1, and obtained the polarizing plate with an adhesive layer and a phase difference layer.
  • Example 3 A pressure-sensitive adhesive composition C was obtained in the same manner as in Example 2, except that the amount of trimethylolpropane xylene diisocyanate added was 0.5 parts with respect to 100 parts of the solid content of the acrylic polymer solution. Except having used the said adhesive composition C, it carried out similarly to Example 1, and obtained the adhesive layer and the polarizing plate with retardation layer.
  • Example 4 As an ultraviolet absorber, 2 weights of 2,2 ′, 4,4′-tetrahydroxybenzophenone (manufactured by Cypro Kasei Co., Ltd., product name “Seesorb 106”, “a2” in Table 1) is used instead of the ultraviolet absorber a1.
  • a pressure-sensitive adhesive composition D was obtained in the same manner as in Example 3 except that part (solid content weight) was added. Except having used the said adhesive composition D, it carried out similarly to Example 1, and obtained the adhesive layer and the polarizing plate with retardation layer.
  • Example 5 The amount of the ultraviolet absorber a1 added was 3 parts by weight, and the pyrimidine compound (manufactured by Yamada Chemical Co., Ltd., product name “FDB-009”, “b1” in Table 1) as the pigment compound was 3 parts by weight.
  • a pressure-sensitive adhesive composition E was obtained in the same manner as in Example 3 except that part (solid weight) was added. Except having used the said adhesive composition E, it carried out similarly to Example 1, and obtained the polarizing plate with an adhesive layer and a phase difference layer.
  • Example 6 The addition amount of the ultraviolet absorber a2 was 3 parts by weight, and 2 parts by weight of an indole compound (made by Orient Chemical Industry Co., Ltd., product name “BONASORB UA3912”, “b3” in Table 1) as a pigment compound)
  • a pressure-sensitive adhesive composition F was obtained in the same manner as in Example 4 except that (solid content weight) was added. Except having used the said adhesive composition F, it carried out similarly to Example 1, and obtained the polarizing plate with an adhesive layer and a phase difference layer.
  • Example 7 In a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer and a stirring device, 95 parts of butyl acrylate, 4.9 parts of acrylic acid, 0.1 part of 2-hydroxyethyl acrylate, and dibenzoyl peroxide are monomers (Solid content) 0.3 parts per 100 parts was added with ethyl acetate and reacted at 60 ° C. for 7 hours under a nitrogen gas stream. Then, ethyl acetate was added to the reaction solution to give a weight average molecular weight of 2.2 million. A solution containing an acrylic polymer (solid content concentration: 30% by weight) was obtained.
  • Example 8 A pressure-sensitive adhesive composition H was obtained in the same manner as in Example 7 except that 3 parts by weight (solid weight) of the dye compound b1 was added. Except having used the said adhesive composition H, it carried out similarly to Example 1, and obtained the adhesive layer and the polarizing plate with retardation layer.
  • Example 9 A pressure-sensitive adhesive composition I was obtained in the same manner as Example 7 except that 3 parts by weight (solid content weight) of the dye compound b3 was added. Except having used the said adhesive composition I, it carried out similarly to Example 1, and obtained the adhesive layer and the polarizing plate with retardation layer.
  • Example 10 Adhesive in the same manner as in Example 7 except that 3 parts by weight (solid weight) of polymethine compound (manufactured by Yamada Chemical Co., Ltd., product name “DAA247”, “b2” in Table 1) was added as the dye compound. Agent composition J was obtained. Except having used the said adhesive composition J, it carried out similarly to Example 1, and obtained the adhesive layer and the polarizing plate with retardation layer.
  • Example 11 A pressure-sensitive adhesive composition K was obtained in the same manner as in Example 10 except that the amount of trimethylolpropane tolylene diisocyanate added was 0.8 parts relative to 100 parts of the solid content of the acrylic polymer solution. Except having used the said adhesive composition K, it carried out similarly to Example 1, and obtained the adhesive layer and the polarizing plate with retardation layer.
  • Example 12 A pressure-sensitive adhesive composition L was obtained in the same manner as in Example 10 except that the amount of trimethylolpropane tolylene diisocyanate added was 2.5 parts with respect to 100 parts of the solid content of the acrylic polymer solution. Except having used the said adhesive composition L, it carried out similarly to Example 1, and obtained the adhesive layer and the polarizing plate with retardation layer.
  • Example 13 A pressure-sensitive adhesive composition M was obtained in the same manner as in Example 10 except that the amount of trimethylolpropane tolylene diisocyanate added was 10 parts with respect to 100 parts of the solid content of the acrylic polymer solution. Except having used the said adhesive composition M, it carried out similarly to Example 1, and obtained the polarizing plate with an adhesive layer and a phase difference layer.
  • a pressure-sensitive adhesive composition N was obtained in the same manner as in Example 2, except that the amount of trimethylolpropane xylene diisocyanate added was 0.02 part with respect to 100 parts of the solid content of the acrylic polymer solution. Except having used the said adhesive composition N, it carried out similarly to Example 1, and obtained the polarizing plate with an adhesive layer and retardation layer.
  • ⁇ Cracks occurred in a part of the retardation layer, but it was a level that could not be visually recognized.
  • ⁇ A crack occurred in a part of the retardation layer, which was a level that can be visually confirmed.
  • X Many cracks occurred on the entire surface of the retardation layer.
  • the retardation layer-attached polarizing plate of the example suppresses the retardation layer from cracking.
  • Examples 2 to 13 containing an ultraviolet absorber as the pressure-sensitive adhesive composition are excellent in ultraviolet absorption characteristics.
  • Examples 5 to 6 and 8 to 13 further including a dye compound are particularly excellent in ultraviolet absorption characteristics. Yes.
  • the optical laminate of the present invention is suitably used for an image display device such as an organic EL display device.

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polarising Elements (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
PCT/JP2019/014960 2018-04-20 2019-04-04 位相差層付き偏光板および有機ｅｌ表示装置 WO2019203008A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980020646.7A CN111886526A (zh) 2018-04-20 2019-04-04 带相位差层的偏振片及有机el显示装置
KR1020207025303A KR20210002457A (ko) 2018-04-20 2019-04-04 위상차층을 갖는 편광판 및 유기 el 표시 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-081257 2018-04-20
JP2018081257A JP2019191282A (ja) 2018-04-20 2018-04-20 位相差層付き偏光板および有機ｅｌ表示装置

Publications (1)

Publication Number Publication Date
WO2019203008A1 true WO2019203008A1 (ja) 2019-10-24

Family

ID=68239667

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/014960 WO2019203008A1 (ja) 2018-04-20 2019-04-04 位相差層付き偏光板および有機ｅｌ表示装置

Country Status (5)

Country Link
JP (1) JP2019191282A (ko)
KR (1) KR20210002457A (ko)
CN (1) CN111886526A (ko)
TW (1) TW201943818A (ko)
WO (1) WO2019203008A1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220119464A (ko) * 2019-12-26 2022-08-29 스미또모 가가꾸 가부시키가이샤 점착제 조성물
JP2021143271A (ja) * 2020-03-11 2021-09-24 日東電工株式会社 多層化粘着剤層、セパレータ付き多層化粘着剤層及びその製造方法、粘着型光学フィルム、セパレータ付き粘着型光学フィルム及びその製造方法、並びに画像表示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017094539A1 (ja) * 2015-12-02 2017-06-08 日東電工株式会社 長尺状の光学積層体および画像表示装置
JP2017165941A (ja) * 2015-12-25 2017-09-21 日東電工株式会社 有機ｅｌ表示装置用粘着剤組成物、有機ｅｌ表示装置用粘着剤層、有機ｅｌ表示装置用粘着剤層付き偏光フィルム、及び有機ｅｌ表示装置
US20180059300A1 (en) * 2016-08-23 2018-03-01 Dongwoo Fine-Chem Co., Ltd. Polarizing plate and image display device comprising the same

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1457792A1 (en) 1998-10-30 2004-09-15 Teijin Limited Retardation film and optical device employing it
JP4651101B2 (ja) * 2005-10-21 2011-03-16 日東電工株式会社 粘着型位相差層付偏光板、その製造方法、光学フィルムおよび画像表示装置
KR20110037206A (ko) * 2009-10-06 2011-04-13 동우 화인켐 주식회사 편광판 및 이것이 구비된 액정표시장치
JP5011444B2 (ja) * 2010-09-03 2012-08-29 日東電工株式会社 粘着型光学フィルム、その製造方法および画像表示装置
JP6592254B2 (ja) * 2015-02-26 2019-10-16 日東電工株式会社 紫外線硬化型アクリル系粘着剤組成物、紫外線硬化型アクリル系粘着剤層、粘着剤層付き偏光フィルム、紫外線硬化型アクリル系粘着剤層の製造方法、及び画像表示装置
JP2017048340A (ja) * 2015-09-04 2017-03-09 日本化薬株式会社 光学用粘着剤組成物、並びにこれを用いた粘着剤層及び粘着型光学フィルム
JP6752434B2 (ja) * 2016-06-08 2020-09-09 池田食研株式会社 茶発酵物の製造方法
JP6882857B2 (ja) * 2016-06-27 2021-06-02 日東電工株式会社 粘着剤層付偏光フィルム、および液晶表示装置
KR102453716B1 (ko) * 2016-06-30 2022-10-11 스미또모 가가꾸 가부시끼가이샤 위상차 필름
JP7348719B2 (ja) * 2017-11-10 2023-09-21 住友化学株式会社 複合位相差板、光学積層体、及び画像表示装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017094539A1 (ja) * 2015-12-02 2017-06-08 日東電工株式会社 長尺状の光学積層体および画像表示装置
JP2017165941A (ja) * 2015-12-25 2017-09-21 日東電工株式会社 有機ｅｌ表示装置用粘着剤組成物、有機ｅｌ表示装置用粘着剤層、有機ｅｌ表示装置用粘着剤層付き偏光フィルム、及び有機ｅｌ表示装置
US20180059300A1 (en) * 2016-08-23 2018-03-01 Dongwoo Fine-Chem Co., Ltd. Polarizing plate and image display device comprising the same

Also Published As

Publication number Publication date
JP2019191282A (ja) 2019-10-31
TW201943818A (zh) 2019-11-16
KR20210002457A (ko) 2021-01-08
CN111886526A (zh) 2020-11-03

Similar Documents

Publication Publication Date Title
JP7184549B2 (ja) 光学積層体および有機ｅｌ表示装置
JP7441611B2 (ja) 位相差層付き偏光板および有機ｅｌ表示装置
WO2007046276A1 (ja) 光学補償層付偏光板およびそれを用いた画像表示装置
WO2015163224A1 (ja) 高耐久ヨウ素系偏光素子
JP2024050947A (ja) 位相差層付き偏光板および有機ｅｌ表示装置
WO2019203008A1 (ja) 位相差層付き偏光板および有機ｅｌ表示装置
JP2019159200A (ja) 光学積層体の製造方法及び粘着層付き光学積層体の製造方法
JP4177077B2 (ja) 光学補償板、それを用いた光学補償層付偏光板、前記光学補償板の製造方法、および、それらを用いた液晶表示装置
WO2019203122A1 (ja) 位相差層付き偏光板および有機ｅｌ表示装置
JP2009128793A (ja) 傾斜配向位相差フィルムの製造方法
TWI854712B (zh) 附相位差層之偏光板及有機el顯示裝置
WO2022224494A1 (ja) 位相差層付偏光板
WO2023176590A1 (ja) 表面保護フィルム付光学積層体および表示システムの製造方法
WO2023176628A1 (ja) 光学積層体および表示システム
JP2019159198A (ja) 光学積層体の製造方法及び粘着層付き光学積層体の製造方法
JP2019159197A (ja) 光学積層体の製造方法及び粘着層付き光学積層体の製造方法
WO2023074037A1 (ja) 位相差層付偏光板
JP2022141116A (ja) 位相差層付偏光板
TW202426983A (zh) 附相位差層之偏光板及包含附相位差層之偏光板的影像顯示裝置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19789228

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19789228

Country of ref document: EP

Kind code of ref document: A1