WO2005078486A1 - 位相差フィルム、偏光板、およびこれらを使用した液晶表示素子 - Google Patents
位相差フィルム、偏光板、およびこれらを使用した液晶表示素子 Download PDFInfo
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- WO2005078486A1 WO2005078486A1 PCT/JP2005/000254 JP2005000254W WO2005078486A1 WO 2005078486 A1 WO2005078486 A1 WO 2005078486A1 JP 2005000254 W JP2005000254 W JP 2005000254W WO 2005078486 A1 WO2005078486 A1 WO 2005078486A1
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- film
- retardation
- inorganic particles
- retardation film
- major axis
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L45/00—Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of 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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/03—Viewing layer characterised by chemical composition
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
- G02F1/133634—Birefringent elements, e.g. for optical compensation the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis
Definitions
- the present invention relates to a retardation film in which particles having optical anisotropy are contained in a transparent film made of a cyclic olefin resin, and the particles are oriented by stretching to develop a retardation.
- the present invention relates to a polarizing plate having a film, and a liquid crystal display device using the same.
- liquid crystal display devices have been widely used for notebook computers, personal computer monitors, car navigation systems, TV monitors, and the like. It has been pointed out from the beginning that the liquid crystal display device has inferior viewing angle characteristics compared to a cathode ray tube (CRT), and various studies have been made to improve the viewing angle characteristics.
- CTR cathode ray tube
- a stretched film obtained by subjecting a transparent film such as polycarbonate or cyclic olefin resin to uniaxial or biaxial stretching or the like is used as a retardation film.
- a transparent film made of, for example, polycarbonate when used, the phase difference is relatively large, but since the photoelastic constant is large, the phase difference changes depending on the usage environment and the phase difference is very short. Unevenness is likely to occur.
- a transparent film made of a cyclic olefin resin is used, phase difference unevenness is likely to occur if a large phase difference with a small phase difference expression is to be obtained.
- the VA method which has recently become mainstream in TV monitors, displays a black state by vertically orienting the liquid crystal layer when the voltage is OFF, and thus has a large phase difference change depending on the viewing angle.
- Patent Document 1 an antireflection film formed from a composition containing acicular particles is known (Patent Document 1 and Patent Document 2).
- This antireflection film has improved antistatic properties, scratch resistance and transparency, and does not disclose any birefringence of the film.
- Patent Document 3 discloses an optical resin material containing a transparent polymer resin and a birefringent inorganic substance, and exemplifies an acicular crystalline mineral as the inorganic substance.
- this optical resin material is a non-birefringent optical material in which an inorganic substance having a birefringence is oriented so as to cancel the birefringence derived from the orientation of the polymer resin.
- Patent Document 3 discloses that the refractive index between the film plane direction and the film thickness direction is determined by the difference between the refractive index in the major axis direction of the inorganic substance having birefringence and the refractive index in the direction orthogonal to the major axis direction. There is no disclosure of the difference between the two.
- Patent document 1 Japanese Patent Application Laid-Open No. 4-245202
- Patent Document 2 Japanese Patent Application Laid-Open No. 2002-355936
- Patent Document 3 JP-A-11-293116
- the present inventors have conducted intensive studies to solve the above problems, and (A) a cyclic olefin resin, By orienting the inorganic particles (B) of the film containing (B) inorganic particles having both shape anisotropy and birefringence, it is confirmed that the obtained film has excellent birefringence. To complete the invention.
- the retardation film according to the present invention comprises:
- (B) a phase difference containing inorganic particles exhibiting shape anisotropy having a major axis and a minor axis and having birefringence in which the refractive index in the major axis direction is larger than the average refractive index in the direction orthogonal to the major axis direction.
- the film is characterized in that the inorganic particles (B) are oriented and have a difference in refractive index between the film plane direction and the film thickness direction.
- the retardation film according to the present invention preferably has an in-plane retardation (RO) force lOOOnm, and a retardation (Rth) in the film thickness direction of 10 lOOOnm. .
- the inorganic particles (B) used preferably have crystallinity, and preferably have an average major axis of 2 ⁇ m or less.
- the ratio (L / D) of (L) to the minor axis (D) is 2 or more, and the major axis direction of the inorganic particles (B) is substantially parallel to the film plane of the retardation film.
- the retardation film according to the present invention is preferably manufactured by stretching. Further, the retardation film according to the present invention may have a transparent conductive film.
- the polarizing plate according to the present invention is a polarizing plate obtained by laminating a protective film (a), a polarizing film (b) and a protective film (c) in this order, wherein the protective film (a) And / or (c) is the above retardation film.
- the polarizing plate may have a transparent conductive film.
- a liquid crystal display device is characterized by having the above retardation film or polarizing plate.
- the retardation film and the polarizing plate according to the present invention exhibit excellent birefringence (retardation) and transparency stably and excellent viewing angle characteristics over a long period of time.
- the retardation film according to the present invention is a transparent film containing (A) a cyclic olefin resin and (B) specific inorganic particles having shape anisotropy and refractive index anisotropy.
- the particles (B) are oriented.
- the retardation film can be obtained, for example, by stretching. By producing in this manner, the molecules of the cyclic olefin resin are oriented, and the inorganic particles (B) are also oriented, so that a difference in the refractive index can be given between the film plane direction and the film thickness direction. .
- Examples of the (A) cyclic olefin resin used in the present invention include the following (co) polymers.
- a ring-opened polymer of a polycyclic monomer represented by the following general formula (1) A ring-opened polymer of a polycyclic monomer represented by the following general formula (1).
- a saturated copolymer of a polycyclic monomer represented by the following general formula (1) and an unsaturated double bond-containing compound is represented by the following general formula (1).
- each of R 1 to R 4 is a hydrogen atom, a halogen atom, a hydrocarbon group having 130 carbon atoms, or another monovalent organic group, which may be the same or different.
- R 1 and R 2 or R 3 and R 4 may be combined to form a divalent hydrocarbon group.
- R 1 or R 2 and R 3 or R 4 are bonded to each other to form
- m may be 0 or a positive integer
- p may be 0 or a positive integer.
- polycyclic monomer examples include the following compounds, but the present invention is not limited to these specific examples.
- R 1 and R 3 in the above general formula (1) are each a hydrogen atom or a carbon atom of 110, more preferably 114, and particularly preferably These are 1-2 hydrocarbon groups.
- Examples of the polar group of the polycyclic monomer include a carboxyl group, a hydroxyl group, and an alkoxycarboxy group.
- Examples include an enyl group, an aryloxycarbonyl group, an amino group, an amide group, and a cyano group. These polar groups may be bonded via a linking group such as a methylene group.
- a hydrocarbon group to which a divalent organic group having polarity such as a carbonyl group, an ether group, a silyl ether group, a thioether group, and an imino group is bonded as a linking group is also exemplified as the polar group.
- a carboxyl group, a hydroxyl group, an alkoxycarbonyl group or an aryloxycarbonyl group is preferred, and an alkoxycarbonyl group or an aryloxycarbonyl group is particularly preferred.
- R 2 and R 4 are a polar group represented by the formula (CH) COOR
- the resulting cyclic olefin resin has a high glass transition temperature, low hygroscopicity, and excellent adhesion to various materials.
- R is a hydrocarbon group, and the number of carbon atoms is preferably 111, more preferably 114, and particularly preferably 112. Further, among these hydrocarbon groups, an alkyl group is preferable.
- n is usually 0-5. The smaller the value of the force n, the higher the glass transition temperature of the obtained cyclic olefin-based resin. Monomers are preferred in that their synthesis is easy.
- R 1 or R 3 is preferably an alkyl group.
- an alkyl group having 1 to 4 carbon atoms is a methyl group, which is more preferable, and an alkyl group having 1 to 2 carbon atoms is more preferable.
- the alkyl group power S binds to the same carbon atom as the carbon atom to which the polar group represented by the above formula (CH) COOR is bonded.
- the cyclic olefin resin obtained can have a low hygroscopicity.
- the copolymerizable monomer examples include cycloolefins such as cyclobutene, cyclopentene, cycloheptene, cyclootaten, and dicyclopentadiene.
- the number of carbon atoms of cycloolefin is preferably 412 to 20, more preferably 5 to 12. These can be used alone or in combination of two or more.
- a preferable ratio of the polycyclic monomer and the copolymerizable monomer is 50/50 by weight, more preferably. Is ⁇ 60Z 40.
- the (1) ring-opening polymer of the polycyclic monomer and (2) the ring-opening copolymer of the polycyclic monomer and the copolymerizable monomer are obtained.
- the ring polymerization reaction is performed in the presence of a metathesis catalyst.
- the metathesis catalyst comprises:
- compound (a) at least one compound selected from compounds having W, Mo and Re (hereinafter referred to as compound (a));
- Group IA elements eg, Li, Na, K, etc.
- Group III elements eg, Mg, Ca, etc.
- Group III elements eg, Zn, Cd, Hg, etc.
- Group III elements Eg, B, A1, etc.
- a group IVA element eg, Si, Sn, Pb, etc.
- a group IVB element eg, Ti, Zr, etc.
- a catalyst comprising a combination of at least one compound selected from compounds having at least one bond between this element and hydrogen (hereinafter, compound (b) and compound (b)).
- an additive (c) described below may be further added.
- Examples of the compound (a) include WC1, MoCl, ReOCl, etc.
- additive (c) component alcohols, aldehydes, ketones, amines and the like can be suitably used, and JP-A 1-132626, page 8, right lower column The compound shown in line 16, line 1, page 9, upper left column, line 17 can also be used.
- the amount of the metathesis catalyst used is such that the molar ratio of the compound (a) to the polycyclic monomer (compound: polycyclic monomer) is usually 1: 500 1: 50,000, Preferably 1: 1, 000 1: 1, 00
- the amount which becomes 0 is preferable.
- the ratio of compound (a) to compound (b) (compound (a): compound (b)) is 1: 1 to 1:50, preferably 1: 2 to 1:30 in terms of metal atom ratio. desirable.
- the molar ratio of the compound (a) to the compound (c) (compound (c): compound (a)) is 0.005: 1 to 15: 1, preferably 0.05: 1 to 7-7. : 1 is desirable.
- Examples of the solvent used in the ring-opening polymerization reaction include alkanes such as pentane, hexane, heptane, octane, nonane and decane; cycloalkanes such as cyclohexane, cycloheptane, cyclooctane, decalin and norbornane; Aromatic hydrocarbons such as benzene, toluene, xylene, ethylbenzene and cumene; halogenated alkanes such as chlorobutane, bromohexane, methylene chloride, dichloroethane, hexamethylene dibutamide, chloroform and tetrachloroethylene; chlorobenzene, etc.
- alkanes such as pentane, hexane, heptane, octane, nonane and decane
- cycloalkanes such as cyclo
- Saturated carboxylic esters such as ethyl acetate, ⁇ -butyl acetate, iso-butyl acetate, methyl propionate and dimethoxyethane; ethers such as dibutyl ether, tetrahydrofuran and dimethoxetane Kind, and the like. These can be used alone or in combination of two or more. Of these, aromatic hydrocarbons are preferred.
- a solvent is used as a solvent constituting the molecular weight regulator solution and a solvent for dissolving the polycyclic monomer and / or the metathesis catalyst.
- the amount of the solvent used is such that the weight ratio of the solvent to the polycyclic monomer (solvent: polycyclic monomer) is usually 1: 1 to 10: 1, preferably 1: 1 to 15 : An amount of 1 is desirable.
- the molecular weight of the ring-opened (co) polymer obtained can be adjusted by the polymerization temperature, the type of catalyst, and the type of solvent, but can also be adjusted by coexisting a molecular weight regulator in the reaction system. Can adjust power S.
- Suitable molecular weight regulators include, for example, free radicals such as ethylene, propene, 1-butene, 1_pentene, 1-hexene, 1-heptene, 1-otaten, 1-nonene and 1-decene. And styrene, of which 1-butene and 1-hexene are particularly preferred. These molecular weight regulators can be used alone or in combination of two or more.
- the amount of the molecular weight modifier to be used is usually 0.005 to 0.6 monol, preferably 0.02 to 0.2, per 1 mol of the polycyclic monomer to be subjected to the ring-opening polymerization reaction. .5 monoles. (Unsaturated hydrocarbon polymer)
- the ring-opening copolymer is a conjugate such as polybutadiene and polyisoprene, which can be obtained by ring-opening polymerization of the polycyclic monomer and the copolymerizable monomer in a ring-opening copolymerization reaction described below.
- unsaturated hydrocarbon-based polymers containing two or more carbon-carbon double bonds in the main chain such as benzene compounds, styrene-butadiene copolymers, ethylene-non-conjugated diene copolymers, and polynorbornenes
- the polycyclic monomer may be subjected to ring-opening polymerization.
- a known ring-opening polymerization reaction for cyclic olefins can be used, and the polycyclic monomer and the copolymerizable monomer are used for the ring-opening polymerization. It can be produced by ring-opening polymerization in the presence of a catalyst, a polymerization reaction solvent, and if necessary, the above-mentioned molecular weight regulator.
- the ring-opened (co) polymer obtained by the above method may be used as it is, or may be used as a hydrogenated (co) polymer obtained by hydrogenating this.
- This hydrogenated (co) polymer is useful as a raw material for a resin having high impact resistance.
- the hydrogenation reaction is carried out in a usual manner, that is, a solution of the ring-opening (co) polymer is added with a hydrogenation catalyst, and hydrogen gas at normal pressure of 1 to 300 atm, preferably 3 to 200 atm is added thereto. — By operating at 200 ° C., preferably 20-180 ° C.
- the hydrogenated (co) polymer obtained by the hydrogenation has excellent heat stability, and the hydrogenated (co) polymer can be heated by molding or when used as a product. The characteristics are not degraded.
- the hydrogenation rate of the hydrogenated (co) polymer is usually at least 50 ° / ⁇ , preferably at least 70%, more preferably at least 90%, particularly preferably at least 98, measured by 1 H_NMR at 500 MHz. / 0 or more, most preferably 99% or more.
- the hydrogenated (co) polymer used as the cyclic olefin resin preferably has a gel content of not more than 1% by weight in the hydrogenated caro (co) polymer. It is preferable that the content is not more than weight%.
- the hydrogenation catalyst those used in a normal hydrogenation reaction of an olefinic compound can be used.
- the hydrogenation catalyst includes a heterogeneous catalyst and a homogeneous catalyst.
- heterogeneous catalyst examples include a solid catalyst in which a noble metal catalyst substance such as palladium, platinum, nickel, rhodium and ruthenium is supported on a carrier such as carbon, silica, alumina and titania.
- a noble metal catalyst substance such as palladium, platinum, nickel, rhodium and ruthenium is supported on a carrier such as carbon, silica, alumina and titania.
- homogeneous catalysts include nickelophore / triethylethanol, nickel acetylacetonato / triethylaluminum, cobalt otatenate Zn-butyllithium, titanocene dichloride / getylaluminum monochloride, rhodium acetate, chlorotris (triphenyl) (Phosphine) rhodium, dichlorotris (triphenylphosphine) ruthenium, chlorohydrocarbonyltris (triphenylphosphine) ruthenium, dichlorocarbonyltris (triphenylphosphine) ruthenium and the like.
- the form of the catalyst may be powder or granular.
- the hydrogenated (co) polymer the above-mentioned ring-opened (co) polymer obtained by hydrogenating the above-mentioned ring-opened (co) polymer may be used. After the conversion, a hydrogenated (co) polymer can also be used.
- the method of cyclizing the ring-opened (co) polymer by the Friedel-Crafts reaction is not particularly limited, but a known method using an acidic compound described in JP-A-50-154399 Can be adopted.
- the acidic compound specifically, A1C1, BF, FeCl, Al 2 O 3
- the cyclized ring-opened (co) polymer can be hydrogenated by the same method as the hydrogenation reaction of the ring-opened (co) polymer.
- cyclic olefin resin a compound containing an unsaturated double bond and the polycyclic monomer is used.
- a saturated copolymer with a product can also be used. This saturated copolymer can be obtained by a usual addition polymerization reaction using a catalyst.
- the unsaturated double bond-containing compound a compound having 2 to 12 carbon atoms is preferable, and a compound having 28 carbon atoms is more preferable.
- the unsaturated double bond-containing compound include olefin compounds such as ethylene, propylene, and butene.
- the preferred weight ratio of the polycyclic monomer to the unsaturated double bond-containing compound is 90Z10 40Z60, more preferably. Is 85Z15 50Z50.
- At least one compound selected from a titanium compound, a zirconium compound and a vanadium compound, and an organoaluminum compound as a promoter are used.
- Examples of the titanium conjugate include titanium tetrachloride and titanium trichloride
- examples of the zirconium compound include bis (cyclopentagenenyl) zirconium chloride and bis (cyclopentagenenyl) zirconium dichloride. Can be.
- the vanadium compound is represented by the following formula:
- R is a hydrocarbon group
- X is a halogen atom, 0 ⁇ a ⁇ 3, 0 ⁇ b ⁇ 3, 2 ⁇ (a + b) ⁇ 3, 0 ⁇ c ⁇ 4, 0 ⁇ d ⁇ 4, 3 ⁇ (c + d) ⁇ 4.
- the vanadium compound represented by the following formula or an electron donor adduct thereof is used.
- Examples of the electron donor include oxygen-containing electron donors such as alcohols, phenols, ketones, aldehydes, carboxylic acids, esters of organic or inorganic acids, ethers, acid amides, acid anhydrides, and alkoxysilanes;
- At least an aluminum-carbon bond or an aluminum-hydrogen bond is required.
- At least one organoaluminum compound selected from compounds containing one is used. It is.
- the ratio of the vanadium compound to the organoaluminum compound is such that the ratio of aluminum atom to vanadium atom (A1ZV) is 2 or more, and preferably 2 or more. — 50, particularly preferably 3 20 is preferred.
- the solvent for the polymerization reaction used for the addition polymerization reaction the same solvent as that used for the ring-opening polymerization reaction can be used.
- the molecular weight of the obtained saturated copolymer is usually adjusted using hydrogen.
- cyclic olefin resin an addition type (co) polymer of at least one monomer selected from the polycyclic monomers, vinyl cyclic hydrocarbon monomers and cyclopentadiene monomers;
- the hydrogenated (co) polymer can also be used.
- biel-based cyclic hydrocarbon monomer examples include biel-cyclopentene-based monomers such as 4-vinylcyclopentene and 2-methyl-4-ethylenecyclopentene; 4-vinyloxycyclopentane and 4-isopropyl Vinylated 5-membered ring hydrocarbon monomers such as biercyclopentane-based monomers such as cyclopentane; 4-Butylcyclohexene, 4-Isopropenylcyclohexene, 1-methyl-4-1-isopropininolecyclohexene, 2-cyclohexene monomers such as 4-methylcyclohexene and 2-methylaminohexyl 4-isopropylcyclohexene; hexene-based monomers; 4-cyclocyclohexane and 2-methyl-4-cyclohexyl hexane.
- biel-cyclopentene-based monomers such as 4-vinylcyclopentene and 2-methyl-4-ethylenecyclopenten
- Xane-based monomers styrene, high methyl styrene, 2-methyl styrene Styrene-based monomers such as 3-methylenostyrene, 4-methylenostyrene, 1-vinylinolephthalene, 2-vinylinolephthalene, 4-phenylstyrene and p-methoxystyrene; d-terpenes, 1-terpenes, Tenolene monomers such as diterpenes, d-limonene, 1-limonene, dipentene; vinylinolecycloheptene monomers such as 4-bulcycloheptene and 4-isopropenylcycloheptene; 4-vinylinolene Bullcycloheptane-based monomers such as cycloheptane and 4-isopropininolecycloheptane and the like can be mentioned. Of these, ste Ren and ⁇ -methylstyrene are preferred.
- cyclopentadiene monomer examples include cyclopentadiene, 1-methylcyclopentadiene, 2-methylcyclopentadiene, 2-ethylcyclopentadiene, 5-methynolecyclopentadiene, and 5,5-methylcyclopentadiene. Is mentioned. Of these, cyclopentadiene is preferred. These can be used alone or in combination of two or more.
- the addition polymerization reaction of one or more monomers selected from the polycyclic monomers, vinyl-based cyclic hydrocarbon monomers and cyclopentadiene-based monomers is carried out by the addition polymerization in the above-described saturated copolymer.
- the reaction can be performed in the same manner as in the reaction.
- the hydrogenated (co) polymer of this addition type (co) polymer can be obtained by the same hydrogenation method as the above-mentioned hydrogenated (co) polymer of the ring-opened (co) polymer.
- the cyclic olefin resin an alternating copolymer of the above polycyclic monomer and atalylate can also be used.
- the “alternate copolymer” means that the structural unit derived from the polycyclic monomer is a copolymer having a structure adjacent to the structural unit derived from atalylate. However, this does not mean that the structural units derived from atalylate are adjacent to each other. That is, it means a copolymer having a structure in which structural units derived from the acrylate are adjacent to each other, but structural units derived from the polycyclic monomer are not adjacent to each other.
- the atalylate examples include straight-chain, branched or cyclic alkyl atalylates having 1 to 20 carbon atoms, such as methyl acrylate, 2-ethylhexyl acrylate, cyclohexino acrylate, and the like; glycidyl acrylate C2-C20 heterocyclic group-containing atalylates such as 1,2-tetrahydrofurfuryl atalylate; pentanoleatelylate and other aromatic-group-containing atalylates having 620 carbon atoms; Isoboronylate Rate, dicyclopentanil Atalylates having a polycyclic structure having 7 to 30 carbon atoms, such as tallylate, may be mentioned.
- the alternating copolymer of the polycyclic monomer and acrylate is usually prepared in the presence of a Lewis acid, based on the total amount of 100 moles of the polycyclic monomer and acrylate, based on the total amount of the polycyclic monomer.
- a Lewis acid based on the total amount of 100 moles of the polycyclic monomer and acrylate, based on the total amount of the polycyclic monomer.
- 70 to 30 moles of the acrylate preferably 40 to 60 moles of the polycyclic monomer, and 60 to 40 moles of the acrylate, particularly preferably the polycyclic monomer. It can be obtained by radical polymerization of the formula monomer in a ratio of 45-55 monoles and acrylate in the ratio of 55-45 moles.
- the amount of noreic acid is 0.001-1 monole for 100 monoallates of atalylate.
- a known organic peroxide or a known azobis-based radical polymerization initiator that generates free radicals can be used.
- the polymerization reaction temperature is usually -20 ° C to 80 ° C, preferably 5 ° C to 60 ° C.
- the solvent for the polymerization reaction the same solvent as that used for the ring-opening polymerization reaction can be used.
- the cyclic olefin resin used in the present invention has an intrinsic viscosity [77] of 0.2 to 5 dl / g, more preferably 0.3 to 3 dl / g, and particularly preferably 0.4 to 4 dl / g. 1 ⁇ 5dl / g, Genoreno ⁇ .
- the number average molecular weight (Mn) in terms of polystyrene measured by one-point chromatography (GPC) is preferably 8,000 to 100,000, more preferably 10,000 to 80,000, and particularly preferably 12, 000-50,000, and the weight average molecular weight (Mw) power S is preferably 20,000-300,000, more preferably 30,000-250,000, and particularly preferably 40,000-200,000. is there.
- Intrinsic viscosity [77] number average molecular weight and weight average molecular weight within the above range
- the glass transition temperature (Tg) of the cyclic olefin resin is usually 100 ° C or higher, preferably
- Tg When Tg is less than the above lower limit, the change in the optical characteristics of the obtained retardation element may be large due to heat from the light source and other adjacent components.
- Tg exceeds the above upper limit, the substrate made of the cyclic olefin resin is heated to a temperature near Tg by stretching or the like. In the case of performing the processing, the possibility of thermal deterioration of the resin increases.
- the saturated water absorption of the cyclic olefin resin at 23 ° C is preferably 0.05 to 2% by weight, and more preferably 0.1 to 1% by weight.
- the saturated water absorption is within this range, uniform optical properties can be imparted to the cyclic olefin resin film, and the adhesion between the cyclic olefin resin film and the retardation film is excellent.
- no exfoliation or the like occurs, and the composition has excellent compatibility with antioxidants and the like, and a large amount of antioxidants and the like can be added.
- the saturated water absorption is less than the above lower limit, adhesion to a retardation film or another transparent support may be poor, and peeling may easily occur.
- the cyclic olefin resin film tends to absorb water and change its dimensions.
- the above saturated water absorption is a value obtained by immersing in water at 23 ° C for 1 week and measuring the increased weight according to ASTM D570.
- annular Examples Orefin resin, the photoelastic coefficient (C) is 0 100 (X 10- 12 Pa- 1
- a large photoelastic coefficient (C) is an external factor when the polymer is used in a glassy state.
- the phase difference is easily generated sensitively due to the stress caused by the frozen strain.
- the photoelastic coefficient (C) is preferably as small as possible.
- a large stress optical coefficient (C) indicates that the cyclic olefin resin film has a retardation.
- the photoelastic coefficient (C) is preferably from 0 to 100 (X 10 — Pa— 1 ), more preferably
- X10-Pa- 1 Preferably 0-80 (X10-Pa- 1 ), more preferably 0-50 (X10-Pa- 1 ), particularly preferably 030 (X10-Pa- 1 ), most preferably 0- 20 (X 10— Pa— 1 ).
- C photoelastic coefficient
- the amount of transmitted light may decrease when used as a phase difference element due to changes in the birefringence of the cyclic olefin-based resin film caused by stresses that occur at times, or changes in the environment when the phase difference element is used. is there.
- the water vapor permeability of the cyclic olefin resin is usually 1 to 400 g / m 2 ′ for 24 hours when a 25 ⁇ m thick film is formed under the conditions of 40 ° C. and 90% RH. 5 350 g / m 2 '24 hr, more preferably 10-300 g / m 2 ' 24 hr.
- the characteristic change due to the moisture content of the adhesive or adhesive when used as the base material of the phase difference element and the characteristic change due to the humidity of the environment in which the phase difference element is used are reduced. 'Can be avoided.
- the cyclic olefin resin used in the present invention is composed of at least one (co) polymer of the above (1)-(7) (co) polymers. Further stabilization can be achieved by adding known antioxidants, ultraviolet absorbers and the like. Further, in order to improve processability, additives used in conventional resin processing such as a lubricant can be added.
- antioxidant examples include 2,6-di-tert-butyl-4_methylphenol, 2,2′-dioxy-1,3,3′-di-butyl-5,5′-dimethyldiphenylmethane, tetrakis [Methylene_3_ (3,5-di_t_butyl_4-hydroxyphenyl) propionate] methane.
- ultraviolet absorber examples include 2,4-dihydroxybenzophenone and 2-hydroxy-4-methoxybenzophenone.
- the cyclic olefin resin used in the present invention may be any one of the above-mentioned (1)-(7) (co) polymers, but (1) 2) Two or more (co) polymers selected from the (co) polymer of (7) may be blended and used. Blending can be performed by a method of mixing in a pellet state using an extruder or a method of mixing in a solution state. You can.
- the inorganic particles used in the present invention exhibit shape anisotropy having a major axis and a minor axis, and have birefringence in which the refractive index in the major axis direction is larger than the average refractive index in the direction orthogonal to the major axis direction.
- Particles hereinafter referred to as “inorganic particles (B)”.
- the long diameter means the longest diameter of the inorganic particles (B) (hereinafter, also referred to as “a-axis”), and the short diameter is the shortest diameter (hereinafter, “b”) of the axes perpendicular to the a-axis. Axis).
- a-axis the longest diameter of the inorganic particles
- b the short diameter
- an axis perpendicular to both the a-axis and the b-axis is defined as “c-axis”.
- the inorganic particles (B) have a ratio of the length of the a-axis (major axis: L) to the length of the b-axis (minor axis: D) ("aspect a b
- (L / D) is usually 2.0 or more, preferably 5.0 10,000, particularly preferably 10
- the ratio (D / D) between the c-axis length (D) and the b-axis length (D) is usually 1
- the inorganic particles (B) When the retardation film is formed by stretching, the inorganic particles (B) can be easily arranged so that the major axis direction of the inorganic particles (B) is parallel to the film plane. Refractivity can be easily controlled. If the aspect ratio (L ZD) is less than 2.0
- the inorganic particles (B) may be arranged in an arbitrary direction in the film, and as a result, the formed film has no birefringence (retardation) or a small value even if it does. It can be. For this reason, in particular, acicular inorganic particles are preferably used.
- the average major axis of the inorganic particles (B) is not particularly limited as long as a retardation film having transparency can be formed, but is usually 2 / im or less, preferably 1 / im or less, more preferably 0.5 / im or less. It is particularly preferably at most 0.1 ⁇ ⁇ .
- the inorganic particles ( ⁇ ) may include particles having a major axis of 10 ⁇ m or more as long as the average major axis is in the above range. Less than 5% by weight, more preferably less than 5% by weight, particularly preferably less than 1% by weight, most preferably less than 0.1% by weight.
- the content of particles having a major axis of 10 xm or more is in the above range, the light transmittance And the difference between the refractive index in the direction parallel to the film surface and the refractive index in the thickness direction of the obtained retardation film can be easily controlled.
- the inorganic particles (B) are particles having a birefringence in which the refractive index in the a-axis direction (major axis direction) is larger than the average refractive index in the direction orthogonal to the major axis direction.
- the retardation of the retardation film is within the range described below, usually 0.010 or more, preferably f to 0.050 or more, more preferably 0.10 or more, particularly preferably 0 or more. More than 200.
- the film of the retardation film is within the range described below, usually 0.010 or more, preferably f to 0.050 or more, more preferably 0.10 or more, particularly preferably 0 or more. More than 200.
- the phase difference in the plane and in the thickness direction can be easily adjusted.
- the average value of the refractive index of the inorganic particles (a) in the a-axis direction (major axis direction) and the refractive index in the direction perpendicular to the a-axis, that is, the average refractive index of the entire particles is usually less than 3, Preferably it is 2.5 or less, more preferably 2.0 or less.
- the average refractive index of the whole particles is in the above range, scattering of light in the formed retardation film can be suppressed.
- the inorganic particles (B) having such shape anisotropy and birefringence when the particles are formed, the refractive index in the major axis direction is larger than the refractive index in the direction orthogonal to the major axis direction.
- the components that are good as long as the particles are mainly composed of an inorganic compound are, specifically,
- BeAKSiO (OH), LiAlSiO, Cu SbS, Fe SiO, FeWO, (Y, Er, Ce, Fe) NbO, Fe (MoO
- AlSi ⁇ ( ⁇ , OH, F), KAlSi O, FeO-OH-nH ⁇ , Co S, Pb ⁇ , Li (Mn, Fe) P ⁇ , Cu
- Ta ⁇ ( ⁇ , OH, F), NiS, Pb (AsO) Cl, Pb ⁇ , FeSi ⁇ (OH), MoS, (Ce, La, Y, Th) P ⁇
- Such inorganic compounds can be used alone or in combination of two or more.
- those having remarkable birefringence and having a relationship between the particle shape and the refractive index satisfying the above-described conditions include SiC, ZnS, AsSe, LiNbO, TiO, SnO, BaTiO,
- BeO, MgF, KH PO are preferred, especially rutile TiO, antimony doped Sn ⁇ ⁇
- the particles containing the above-mentioned inorganic compound as a main component if the above-mentioned inorganic particles have both the shape anisotropy and the birefringence, for example, the following inorganic minerals are finely pulverized. Can be used.
- Sulfide minerals such as pyrite, chalcopyrite, cinnabar, porphyry steel, chicken fossil, and ores;
- Oxidized minerals such as spinel, spinel, corundum, red iron, golden red, gilded and protein stones;
- Quartz such as quartz, red quartz, jasper, chalcedony
- Halogenated minerals such as fluorite, cryolite and rock salt
- Carbonate minerals such as calcite, aragonite, rhodochrosite, malachite, and bronzeite;
- Sulphate minerals such as barite, celestite, gypsum and lead sulfate
- Phosphate minerals such as turquoise, hornstone, apatite, and strengite
- Arsenic minerals such as Adam ore;
- Feldspars such as potassium feldspar, plagioclase, albite
- Zeolites such as mesolite, chabazite, pyroxene, pyroxene, sodalite, turbidite
- Tungstate minerals molybdenum minerals; borate minerals; and vanadate minerals.
- such an inorganic mineral is used as a main raw material, and other components are mixed and used as necessary, and the CZ method, the FZ method, the skull-melt method, the Bernoulli method, the Bridgman method, etc.
- a melt method for growing a single crystal from a melt a solution method for growing a single crystal by dissolving mainly in water as a solvent; an inorganic substance melted instead of water, such as lead oxide, lead fluoride, molybdenum oxide, and titanium oxide
- the method of crystal growth by flux method using Ngustene, boron oxide, vanadium oxide, etc. as a solvent hydrothermal method mainly used for quartz; gas phase method such as CVD and PVD;
- the inorganic particles (B) having both the shape anisotropy and the birefringence as described above can be prepared.
- the structure of the inorganic particles (B) is not particularly limited as long as it has both the shape anisotropy and the birefringence as described above. Crystalline ones are more preferable than single crystal ones. By using the crystalline inorganic particles (B), the birefringence of the retardation film can be more accurately and efficiently expressed. Also, the crystal system is not particularly limited as long as it has the above-mentioned shape anisotropy and birefringence, and any one of triclinic, monoclinic, oblique, ridged, square, hexagonal, and cubic can be used. It may be.
- the inorganic particles (B) are usually 0.001 to 10 parts by weight, preferably 0.01 to 5 parts by weight, particularly preferably 0.1 to 1 part by weight, per 100 parts by weight of the cyclic olefin resin. It is contained in. When the content of the inorganic particles (B) is in the above range, the birefringence of the obtained retardation film is particularly excellent.
- the inorganic particles (B) may be surface-treated with a treating agent such as a coupling agent in order to further improve the dispersibility and adhesion in the cyclic olefin resin.
- a treating agent such as a coupling agent
- the surface treatment means an operation of modifying the surface by mixing the inorganic particles (B) with the surface treatment agent. May be used, either physically adsorbing the particles or chemically bonding the inorganic particles (B) with the surface treatment agent.However, from the viewpoint of the surface treatment effect, the method of chemically bonding the particles should be used. Is preferred.
- Examples of the surface treating agent include isopropyl triisostearoyl titanate, titanium n-butoxide, titanium ethoxide, titanium 2-ethylhexoxide, titanium isobutoxide, titanium isopropoxide, titanium methoxide, and titanium methoxypro.
- Coupling agents such as tetrabutoxytitanium, tetrabutoxyzirconium, and tetraisopropoxyaluminum are exemplified. These coupling agents can be used alone or in combination of two or more.
- the surface treatment agent is used in an amount of usually 0.120 parts by weight, preferably 0.5-10 parts by weight, more preferably 115 parts by weight, based on 100 parts by weight of the inorganic particles (B). It is desirable to add soup. When the amount of the surface treatment agent is less than the above lower limit, the surface treatment effect is sufficiently exhibited. If the amount of added surface treatment agent exceeds the above upper limit, a large amount of unreacted surface treatment agent remains when the retardation film is formed, and the retardation stability of the retardation film and The mechanical strength may be insufficient.
- the retardation film according to the present invention is obtained by mixing the inorganic particles (B) and the cyclic olefin resin, for example, forming a transparent film, and then orienting the inorganic particles (B) by stretching or the like. It is formed. Further, the birefringence of the retardation film can be easily controlled by controlling the stretching ratio and the like.
- the transparent film used in the present invention is formed by molding a resin composition containing the cyclic olefin resin (A) and the inorganic particles (B) by a melt molding method or a solution casting method (solvent casting method). The ability to gain by doing it.
- the inorganic particles (B) may be dispersed in the cyclic olefin resin in advance, or may be added and dispersed during the production of the transparent film.
- a method of dispersing in a molten state using a uniaxial or biaxial melt kneader or a method of dispersing in a solution state may be mentioned. .
- a method of dispersing in the form of a solution is preferable because the dispersibility of the inorganic particles is more easily improved.
- the transparent film is dispersed in a solution state and directly used in the production of the film. It is preferable to use it in terms of productivity. By doing so, the uniformity of the film thickness and the surface smoothness are further improved in addition to the dispersibility of the inorganic particles (B).
- the method for obtaining the transparent film by the solvent casting method is not particularly limited, and a known method can be applied.
- the concentration of the composition is usually 0.1 to 90% by weight, preferably 1 to 50% by weight, more preferably 10 to 35% by weight. Do . If the concentration of the resin is less than the above lower limit, it is difficult to secure the thickness of the film, and there may be a problem that the surface smoothness of the film is not obtained due to foaming due to evaporation of the solvent. On the other hand, when the concentration exceeds the above upper limit, the solution viscosity becomes too high, and the thickness and surface of the obtained cyclic olefin resin film become difficult to be uniform.
- the viscosity of the above solution at room temperature is usually 1 1 1,000,000,000 mPa-s, preferably 10-100,000 mPa-s, more preferably 100 50, OOOmPa-s, and particularly preferably 1, 000—40,000 mPa * s.
- Examples of the solvent to be used include aromatic solvents such as benzene, toluene, and xylene; cellosolve solvents such as methyl cellosolve, ethyl ethyl solvent, and 1-methoxy-12-propanol; diacetone alcohol, acetone, cyclohexanone, Ketone solvents such as methylethyl ketone and 4-methyl-2-pentanone; ester solvents such as methyl lactate and ethyl lactate; cycloolefin solvents such as cyclohexanone, ethylcyclohexanone and 1,2-dimethylcyclohexane Halogen-containing solvents such as 2,2,3,3-tetrafluoro-1-propanol, methylene chloride, and chloroform; ether solvents such as tetrahydrofuran and dioxane; alcohol solvents such as 1-pentanol and 1-butanol. Can be mentioned
- the solubility parameter (SP value) power is preferably 10-30 (MPa 1/2 ), more preferably 10-25 (MPa V2 ), and particularly preferably 15-25.
- SP value solubility parameter
- a solvent having a pressure of (MPa V2 ) most preferably 15 to 20 (MPa 1/2 ) is used, a transparent film containing inorganic particles (B) having excellent surface uniformity and optical characteristics can be obtained.
- the above-mentioned solvents can be used alone or in combination of two or more.
- the SP value of the mixed solvent is preferably within the above range.
- the SP value of a mixed solvent can be predicted by the weight ratio of the solvent.For example, when two types of solvents (solvent 1 and solvent 2) are mixed, the weight fraction of each solvent is calculated as W
- the SP value of the solvent can be calculated by the following equation.
- a metal drum As a method for producing a transparent film by a solvent casting method, a metal drum, a steel belt, a polyester film such as polyethylene terephthalate (PET) or polyethylene naphthalate (PEN), a Teflon (Registered trademark)
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- Teflon Teflon
- the solution can be applied to the support by spraying, brushing, roll spin coating, debbing, or the like, and then the solvent can be dried and the film can be peeled off from the support to produce the film.
- the drying step in the solvent casting method is not particularly limited and can be carried out by a generally used method, for example, a method of passing through a drying furnace through a number of rollers. If bubbles are generated due to evaporation, the characteristics of the film will be significantly reduced.To avoid this, the drying process should be performed in two or more stages, and the temperature or air volume should be appropriately controlled for each process. Les, prefer to be.
- the amount of residual solvent in the transparent film is usually 10% by weight or less, preferably 5% by weight or less, more preferably 1% by weight or less, and particularly preferably 0.5% by weight or less. If the amount of the residual solvent exceeds the above upper limit, the time-dependent change in the dimensions of the cyclic olefin resin film is increased. In addition, the residual solvent may lower the Tg and lower the heat resistance.
- the transparent film may need to contain a trace amount of a residual solvent in some cases.
- the amount of residual solvent is usually 10 to 0.1% by weight, preferably 5 to 0.1% by weight. %, More preferably 1.1 to 0.1% by weight.
- the thickness of the transparent film is usually 11 to 500 ⁇ m, preferably 10 to 300 ⁇ m, and more preferably 30 to 100 ⁇ m. If the thickness of the film is less than the above lower limit, handling becomes substantially difficult. Further, when the thickness of the film exceeds the above upper limit, it becomes difficult to wind the film into a roll shape, and the light transmittance may decrease.
- the retardation film according to the present invention can be obtained by orienting the inorganic particles (B) in the transparent film obtained by the above method.
- the orientation of the inorganic particles (B) can be performed, for example, by stretching a transparent film.
- the stretching method For example, a known uniaxial stretching method or biaxial stretching method can be used. In other words, a transverse uniaxial stretching method using a tenter method, a compression stretching method between rolls, a vertical uniaxial stretching method using rolls having different peripheral speeds, a biaxial stretching method combining a horizontal uniaxial and a vertical uniaxial method, an inflation method, etc. A stretching method or the like can be used.
- the stretching speed is usually 1 to 5,000% / minute, preferably 50 to 1,000% / minute, more preferably 100,000% / minute. And particularly preferably 100 500% / min.
- the biaxial stretching method there are a method of performing stretching in two directions at the same time and a method of performing stretching treatment in a direction different from the initial stretching direction after uniaxial stretching.
- the intersection angle between the two stretching axes is usually in the range of 120-60 degrees.
- the stretching speed may be the same or different in each stretching direction, but is usually 1 to 5,000. / 0 / min, preferably 50-1,000% / min, more preferably 100,000% / min, particularly preferably 100,500% / min.
- the stretching temperature is not particularly limited, but is usually Tg ⁇ 30 ° C, preferably Tg ⁇ 10 ° C based on the glass transition temperature (Tg) of the cyclic olefin resin described above. More preferably, it is in the range of Tg—5—Tg + 10 ° C.
- Tg glass transition temperature
- the stretching ratio is not particularly limited because it is determined by desired properties, but is usually 1.01 to 10 times, preferably 1.1 to 5 times, and more preferably 1.1 to 13 times. . If the stretching ratio exceeds 10 times, it may be difficult to control the phase difference.
- the difference between the respective stretching ratios is preferably 0.01 to 8 times, more preferably 0.1 to 3 times, and particularly preferably 0.1 to 1 time.
- the stretched finolem may be cooled as it is, but it is allowed to stand in an atmosphere of Tg_20-Tg ° C for at least 10 seconds, preferably 30 seconds to 60 minutes, more preferably 1 minute to 60 minutes. It is preferable to place them. This makes it possible to obtain a stable phase difference film with little change over time in the phase difference characteristic.
- the linear expansion coefficient of the retardation film is preferably 1 X 10 " 4 (1 / ° C) or less, more preferably 9 X 10" in the temperature range of 20 ° C to 100 ° C. 5 (1 / ° C) or less Preferably at 8 X 10- 5 (1 / ° C) or less, and most preferably Ru der 7 X 10- 5 (1 / ° C) below.
- the linear expansion coefficient difference between the stretching direction and then in the vertical direction is preferably at 5 X 10- 5 (1 / ° C) or less, still more preferably less 3 X 10- 5 (1 / ° C), in particular preferably at 1 X 10- 5 (1 / ° C) or less.
- the linear expansion coefficient of the retardation film is within the above range, the change in the phase difference of the transmitted light caused by the stress change due to the temperature and humidity during use can be suppressed, and the adhesion to glass or the like can be maintained well.
- a retardation film having stable optical properties over a long period of time can be obtained.
- the film stretched as described above has a state in which the molecules of the cyclic olefin resin are oriented by stretching, and the majority of the inorganic particles (B) lie parallel to the film plane, that is, The major axis direction of the inorganic particles (B) is substantially parallel to the film plane. Further, the orientation of the inorganic particles (B) in the major axis direction in the plane of the film can be adjusted by the stretching ratio in each direction during biaxial stretching and the difference between them. In other words, the major axis direction tends to be oriented in the direction in which the stretching ratio is large, and the tendency is stronger as the stretching ratio is further increased.
- this retardation film has a finolem plane direction and a film thickness direction (z direction). ) causes a difference in refractive index, and a phase difference can be generated in the film thickness direction.
- the performance of imparting a retardation is controlled by the type, shape, and content of the inorganic particles (B), the retardation value of the film before stretching, the stretching ratio, the stretching temperature, and the thickness of the film after stretching and orientation. That can be S. That is, when the film before stretching has a constant thickness, the absolute value of the retardation tends to increase as the amount of the inorganic particles (B) increases and as the film has a higher stretching ratio. By changing the amount and the stretching ratio, a retardation film having a desired retardation value can be obtained.
- the in-plane retardation (R0) of the retardation film according to the present invention at a light wavelength of 590 nm obtained by the above-described method is usually 10 1000 nm, preferably 10-500 nm, more preferably 10-500 nm. lOOnm.
- the retardation (Rth) in the thickness direction of the film at a light wavelength of 590 nm is usually 10 to 1000 nm, preferably 30 to 500 nm, and more preferably 50 to 300 nm.
- the retardation or the retardation in the film thickness direction is preferably 1.2 to 0.8, more preferably 1.1 to 0.9, and particularly preferably 1.15, based on the respective values at a light wavelength of 590 nm. -0.95.
- the value of the phase difference is within the above range, good characteristics can be exhibited when used in a liquid crystal device.
- the retardation film according to the present invention may be a retardation film composed of the above retardation film and a transparent conductive film described later. That is, a transparent conductive layer can be laminated on at least one surface of the retardation film.
- the transparent conductive layer As a material for forming the transparent conductive layer (transparent conductive film), a metal such as Sn, In, Ti, Pb, Au, Pt, or Ag, or an oxide thereof is generally used. These single metal films can be formed on a substrate, and if necessary, the single metal films can be oxidized to produce a transparent conductive film. There is also a method of attaching and forming a metal oxide layer from the beginning of film formation. At the beginning of film formation, a film is formed in the form of a simple metal or a lower oxide, followed by thermal oxidation, anodic oxidation or liquid phase oxidation. It can also be made transparent by applying an oxidation treatment such as
- These transparent conductive films may be formed by bonding a sheet or film having another transparent conductive layer to the retardation film by a plasma polymerization method, a sputtering method, a vacuum evaporation method, a plating method, or the like. It may be formed directly on the retardation film by an ion plating method, a spray method, an electrolytic deposition method, or the like.
- the thickness of these transparent conductive films is appropriately determined depending on the desired properties and is not particularly limited, but is usually 10 to 10,000 angstroms, preferably 50 to 5,000 angstroms.
- an adhesive layer and an anchor coat layer may be formed between the retardation film and the transparent conductive film as needed.
- the adhesive layer can be formed using a heat-resistant resin such as epoxy resin, polyimide, polybutadiene, phenol resin, and polyetheretherketone.
- the anchor coat layer is formed by a known curing method using an anchor coat agent including an acrylic prepolymer such as epoxy diatalylate, urethane diatalylate, or polyester diatalylate.
- it can be formed by curing by UV curing or heat curing. [0135] (Combination of retardation film and antireflection film)
- the retardation film according to the present invention may be used by forming an antireflection film on the film.
- the composition for forming the antireflection film includes, for example, a fluorine-containing copolymer having a hydroxyl group and a curable compound having a functional group capable of reacting with the hydroxyl group. It is preferable that the composition further contains a thermal acid generator and / or an organic solvent.
- the refractive index of the antireflection film is preferably adjusted within a range of ⁇ 10% from the value of the square root of the product of the refractive index of the retardation film in the thickness direction and the refractive index of a medium such as a substrate in contact with the retardation film, More preferably, the value is adjusted within a range of ⁇ 5% from the value of the square root.
- the polarizing plate according to the present invention is a polarizing plate obtained by laminating a protective film (a), a polarizing film (b), and a protective film (c) in this order, and the protective film (a) and / or ( c) is a polarizing plate comprising the retardation film. Further, in the polarizing plate according to the present invention, similarly to the above-mentioned retardation film, a transparent conductive layer can be laminated on at least one surface thereof, and at this time, an adhesive layer and an anchor coat layer can also be formed.
- the polarizing film (b) used in the present invention may be, for example, a film made of polybutyl alcohol (PVA) or a polymer obtained by formalizing a part of PVA, or a powerful two-color film such as iodine or a dichroic dye.
- those having a high degree of polarization and high light transmittance are preferably used.
- the thickness of the polarizing film (b) is preferably 5 to 80 zm, but the present invention is not limited to this.
- polarizing film (b) other than the above-mentioned PVA-based film, other films may be used as long as they exhibit similar characteristics.
- a film made of a cyclic olefin resin may be subjected to a dyeing treatment, a stretching treatment, a crosslinking treatment and the like in an appropriate order and method.
- the retardation film was used for only one or the other of the protective films (a) and (c).
- a film made of a polymer having excellent transparency, mechanical strength, heat stability, moisture shielding property, and the like is preferably used as the remaining protective film.
- cellulose-based films such as diacetinocellulose and triacetylcellulose (TAC); polyester-based films such as polyethylene terephthalate, polyethylene isophthalate, and polybutylene terephthalate; polymethyl (meth) acrylate, and polyethyl (meth) acrylate Acrylic resin films; polycarbonate films, polyethersulfone films, polysulfone films, polyimide films, cyclic olefin resin films and the like can be used. These films can be suitably produced by a solution casting method (casting method) or a melt molding method.
- the thickness of the protective film is usually from 20 to 250 ⁇ , preferably from 30 to 100 zm.
- the film is made of a cyclic olefin resin. It is preferable to use a film.
- the polarizing plate according to the present invention can further have various functional layers on one or both sides of the polarizing plate.
- the functional layer include a pressure-sensitive adhesive layer, an anti-glare layer, a hard coat layer, an anti-reflection layer, a half-reflection layer, a reflection layer, a luminous layer, a diffusion layer, and an electorum luminescence layer.
- These functional layers can be provided in combination of two or more layers of various types, and examples thereof include a combination of an antiglare layer and an antireflection layer, a luminous layer and a reflective layer, and a luminous layer and a light diffusion layer.
- the combination of functional layers is not limited to these.
- the polarizing plate according to the present invention can be manufactured by laminating the polarizing film (b) and the protective films (a) and (c) by a known method.
- at least one of the protective films (a) and (c) may be the retardation film.
- an adhesive or an adhesive can be used for laminating the polarizing film (b) and the protective films (a) and (c).
- adhesives and adhesives those having excellent transparency are preferred.
- Pressure-sensitive adhesive the above resin having a functional group such as a hydroxyl group or an amino group Curable pressure-sensitive adhesives in which a curing agent such as an isocyanate group-containing compound is added; polyurethane-based dry laminating adhesives; synthetic rubber-based adhesives; and epoxy-based adhesives.
- a curing agent such as an isocyanate group-containing compound
- Parts and % mean “parts by weight” and “% by weight” unless otherwise specified.
- Nx is the maximum refractive index in the film plane direction
- Ny is the refractive index in the film plane direction and the direction perpendicular to Nx
- Nz is the refractive index in the film thickness direction
- d is the film thickness.
- the photoelastic constant (C) is a constant load on a strip of film sample at room temperature (25 ° C).
- the cross section of the retardation film was observed with an electron microscope. A film having no voids inside the retardation film and remarkable aggregation of fine particles was determined to be a retardation film having good particle dispersibility.
- a hydrogenation reaction was carried out by heating and stirring for 3 hours under the conditions of a hydrogen gas pressure of 100 kg / cm 2 and a reaction temperature of 165 ° C.
- reaction solution hydrogenated polymer solution
- hydrogen gas was released.
- This reaction solution was poured into a large amount of methanol to separate and collect a coagulated product, which was dried to obtain a hydrogenated polymer (specific cyclic polyolefin resin).
- the hydrogenation rate measured by OMHz ⁇ -NMR was 99.9%.
- the glass transition temperature (Tg) of this resin (a-1) was measured by the DSC method.
- the resin (a_l) was analyzed by GPC method (solvent: tetrahydrofuran, column: TSK-GEL H column manufactured by Tosoh Corporation) to obtain a number average molecular weight (Mn) and a polystyrene equivalent.
- Mn number average molecular weight
- Mw weight average molecular weight
- Mw molecular weight distribution
- the saturated water absorption at 23 ° C. was measured to be 0.45%, and the SP value was measured to be 19 (MPa 1/2 ).
- Rutile-type acicular titanium oxide fine powder manufactured by Ishihara Techno Co., Ltd., trade name: TTO-S-4, major axis length (L): 70 nm, ratio of major axis to minor axis length (L / D): 5) 10 parts by weight, polyethylene oxide aab
- acicular tin oxide fine powder manufactured by Ishihara Techno Co., Ltd., trade name: FS-10P, major axis length (L): 1000 nm, ratio of major axis to minor axis length) (L / ⁇ ):
- a needle-like tin oxide particle dispersion (2) was prepared in the same manner as in Preparation Example 1 except that 70) was used.
- spherical titanium oxide fine powder (manufactured by Ishihara Techno Co., Ltd., trade name: TTO-51 (D), length of major axis (L): 40 nm, length of major axis and minor axis) Ratio (L / ⁇
- potassium titanate fine powder manufactured by Otsuka Chemical Co., Ltd., trade name: Tismo N, length of major axis (L): 15 xm, ratio of major axis to minor axis length ( L / D):
- a potassium titanate particle dispersion (4) was prepared in the same manner as in Production Example 1 except that 30) was used. did.
- the resin (a-1) was dissolved in toluene so as to have a concentration of 30% (solution viscosity at room temperature was 30,000 mPa-s), and rutile-type acicular titanium oxide particles were added to 100 parts by weight of the resin.
- rutile-type acicular titanium oxide particles were added to 100 parts by weight of the resin.
- pentaerythrityltetrakis [3- (3,5-di_t_butyl_4-hydroxyphenyl) propionate] is further added as an antioxidant. 0.1 part by weight was added to 100 parts by weight of the resin.
- the obtained liquid was filtered using a metal fiber sintered filter (manufactured by Nippon Pall Co., Ltd.) with a pore size of 2.5 ⁇ while controlling the flow rate of the solution so that the differential pressure was within IMPa. did.
- a metal fiber sintered filter manufactured by Nippon Pall Co., Ltd.
- an INVEX lab coater manufactured by Inoue Metal Industry Co., Ltd.
- the above filtrate was applied onto a 100 ⁇ m PET film (Noremirror U94, manufactured by Toray Industries, Inc.) so that the film thickness after drying would be 100 / m, and this was primarily dried at 50 ° C. Thereafter, secondary drying was performed at 90 ° C.
- the PET film was peeled off to obtain an optical film (al).
- the residual solvent amount of the obtained optical film was 0.5%.
- the total light transmittance of each of the films was 90% or more.
- the number of luminescent spots when converted to around 2 lms of this optical film was 0.
- the optical film (al) was used as a raw film, and after removing foreign substances adhering to the film surface using an adhesive roll, the film was heated to 180 ° C (Tg + 10 (° C), and stretched 1.15 times in the longitudinal direction of the film plane at a stretching speed of 300% Z minute, and then stretched 1.20 times in the transverse direction of the film plane. Thereafter, the film was cooled in an atmosphere of 150 ° C (Tg-20 ° C) for 1 minute while holding the film, and further cooled to room temperature and taken out to obtain a retardation film (a2).
- a retardation film (a3) was obtained in the same manner as described above, except that the stretching ratio of the optical film (al) was changed to 1.20 times in the vertical direction and 1.25 times in the horizontal direction.
- Table 1 shows the in-plane retardation value, thickness direction retardation value, film thickness, and haze of the films (al), (a2), and (a3) at a wavelength of 590 nm. [0164] Furthermore, it had the retardation films (a2) and bright point when the film in terms of lm 2 around (a3) Les also shift zero.
- Table 1 also shows the phase difference values after the durability test.
- An optical film (bl) was obtained in the same manner as in Example 1, except that the particle dispersion liquid (2) was used instead of the particle dispersion liquid (1).
- the total light transmittance of all films is 90. / o or more.
- the retardation film (b2) was obtained in the same manner as in Example 1, except that the stretching ratio of the optical film (bl) was set to 1.20 times in the vertical direction and 1.25 times in the horizontal direction.
- Table 1 shows the in-plane retardation value, thickness direction retardation value, film thickness, and haze of the films (bl) and (b2) at a wavelength of 590 nm.
- Table 1 also shows the phase difference values after the durability test.
- a retardation film (e2) was obtained in the same manner as in Example 1, except that the stretching ratio of the optical film (el) was set to 1.20 times in the vertical direction and 1.25 times in the horizontal direction.
- Table 1 shows the in-plane retardation value, the thickness direction retardation value, the film thickness, and the haze of the films (el) and (e2) at a wavelength of 590 nm.
- Table 1 also shows the phase difference values after the durability test.
- the retardation film (c2) was obtained in the same manner as in Example 1 except that the stretching ratio of the optical film (cl) was set to 1.15 times in the longitudinal direction and 1.20 times in the horizontal direction.
- a retardation film (c3) was obtained as described above, except that the stretching ratio of the optical film (cl) was changed to 1.20 times in the vertical direction and 1.25 times in the horizontal direction.
- Table 1 shows the in-plane retardation value, thickness direction retardation value, film thickness, and haze of these films (cl), (c2), and (c3) at a wavelength of 590 nm.
- Table 1 shows the phase difference values after the durability test.
- An optical film (dl) was obtained in the same manner as in Example 1 except that the particle dispersion (3) was used instead of the particle dispersion (1).
- the total light transmittance of each of the films was 90% or more.
- Examination of the photoelastic constant (C) of the optical film (dl), C 5 ( X 10- 12 Pa- 1
- the retardation film (d2) was obtained in the same manner as in Example 1, except that the stretching ratio of the optical film (dl) was set to 1.20 times in the vertical direction and 1.25 times in the horizontal direction.
- Table 1 shows the in-plane retardation value, thickness direction retardation value, film thickness, and haze of the films (dl) and (d2) at a wavelength of 590 nm.
- Table 1 also shows the phase difference values after the durability test.
- Polycarbonate A2700 (Tg 150 ° C) manufactured by Idemitsu Petrochemical Co., Ltd. was used instead of resin (a_l), methylene chloride was used instead of toluene, and particle dispersion (1) was not used. Except for the above, a polycarbonate optical film (fl) was obtained in the same manner as in Example 1. The total light transmittance of each of the films was 90% or more. Table 1 shows the characteristic values of the obtained polycarbonate film. Adjust the photoelastic constant (C) of this optical film (fl).
- This optical film (f1) was used as a raw film, and the stretching temperature was changed to 160 ° C (Tg + 10 ° C), and the stretching ratio was changed to 1.1 times in the longitudinal direction and 1.15 times in the transverse direction. Except for the above, a retardation film (f2) was obtained in the same manner as in Example 1. Table 1 shows the in-plane retardation value, thickness direction retardation value, film thickness and haze of the retardation film (f2) at a wavelength of 590 nm.
- Table 1 also shows the phase difference values after the durability test.
- Inorganic particles (Aim) (%) Before endurance After endurance Before endurance After endurance Optical film a 1 Cyclic polyolefin resin 1 00 0.8 2 2 40 40 Needle-like titanium oxide particles Length 1.15 times
- Stretched film e 2 60 1 2.6 55 55 1 80 1 80 1.25x width
- a reaction vessel is charged with 250 parts of distilled water, and 90 parts of butyl acrylate, 8 parts of 2-hydroxyethylenomethacrylate, 2 parts of dibutylbenzene, and 0.1 part of potassium oleate are added thereto. This was stirred and dispersed by a Teflon (registered trademark) stirring blade. After the atmosphere in the reaction vessel was replaced with nitrogen, the temperature of the system was raised to 50 ° C., and 0.2 parts of potassium persulfate was added to initiate polymerization. After 2 hours, 0.1 part of potassium persulfate was further added, the system was heated to 80 ° C, and the polymerization reaction was continued for 1 hour to obtain a polymer dispersion.
- Teflon registered trademark
- this polymer dispersion was concentrated using an evaporator until the solid content concentration became 70%, whereby an aqueous pressure-sensitive adhesive (pressure-sensitive adhesive having a polar group) consisting of an aqueous dispersion of an acrylate polymer was obtained. Obtained.
- Mn number average molecular weight
- Mw weight average molecular weight of the acrylate polymer
- Mn was 69000 and Mw was 135,000.
- the intrinsic viscosity ( ⁇ inh) of the aqueous pressure-sensitive adhesive measured in a 30 ° C black hole form was 1.2 dl / g.
- PVA polybutyl alcohol
- the film was further stretched by a factor of 2 in a cross-linking bath at 55 ° C. of an aqueous solution having a boric acid concentration of 5% by weight and a potassium iodide concentration of 8% by weight and dried to obtain a polarizer.
- an optical film (al) was applied to one surface of the polarizer, and a retardation film (a2) was applied to the other surface with a PVA-based adhesive, and the polarizing plate (a4) was attached. Obtained.
- the transmittance and the degree of polarization of the polarizing plate (a4) were examined, they were 44.0% and 99.9%. This process was performed in an environment with a cleanliness of 1000, and prior to bonding, the adhered foreign substances were removed using an adhesive roll.
- the optical axis (slow axis) of the in-plane retardation of each film was parallel to the light transmission axis of the polarizer.
- the number of luminescent spots was 0 when converted to around 2 lms of the film (a4).
- a durability test was performed using this polarizing plate (a4), no change was observed in the transmittance and the degree of polarization.
- Example 3 On one side on the polarizing plate (a4) obtained in Example 3, 10- 4 Torr vacuum in the, by depositing Si Nx in a film thickness of 80 nm, further, in order in a thickness of 20nm to TbFeCo, 30 nm and SiNx An antireflection function was imparted by depositing A1 as an outer layer with a thickness of 50 nm at each thickness of 50 nm.
- the above coating composition was applied to a dry coating film of 5 ⁇ m using an air spray gun, and heated at 140 ° C for 60 minutes to form a cured coating film.
- a polarizing plate (a5) was obtained.
- the transmittance and the degree of polarization of the polarizing plate (a5) were examined, they were 44.0% and 99.9%. This process was performed in an environment with a cleanliness of 1000, and prior to bonding, the adhered foreign matter was removed using an adhesive roll.
- the retardation film or polarizing plate according to the present invention has excellent retardation performance and transparency. As it has stable characteristics over a long period of time, it can be used for various optical components. For example, various liquid crystal display elements such as mobile phones, digital information terminals, pagers, navigation, in-vehicle liquid crystal displays, liquid crystal monitors, dimming panels, displays for OA equipment, displays for AV equipment, electoluminescence display elements, etc. It can be used for touch panels and the like. It is also useful as a wave plate used in a recording / reproducing apparatus for optical disks such as CD, CD-R, MD, MO, and DVD.
- various liquid crystal display elements such as mobile phones, digital information terminals, pagers, navigation, in-vehicle liquid crystal displays, liquid crystal monitors, dimming panels, displays for OA equipment, displays for AV equipment, electoluminescence display elements, etc. It can be used for touch panels and the like. It is also useful as a wave plate used in a recording / reproducing apparatus
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Medicinal Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polarising Elements (AREA)
- Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Liquid Crystal (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/588,656 US20070172604A1 (en) | 2004-02-13 | 2005-01-12 | Phase difference film, polarizing plate, and liquid crystal display element using them |
EP05703493A EP1715365A4 (en) | 2004-02-13 | 2005-01-12 | PHASE DIFFERENTIAL FILM, POLARIZATION PLATE AND LIQUID CRYSTAL DISPLAY ELEMENT THEREWITH |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004037166A JP2005227606A (ja) | 2004-02-13 | 2004-02-13 | 位相差フィルム、偏光板、およびこれらを使用した液晶表示素子 |
JP2004-037166 | 2004-02-13 |
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WO2005078486A1 true WO2005078486A1 (ja) | 2005-08-25 |
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PCT/JP2005/000254 WO2005078486A1 (ja) | 2004-02-13 | 2005-01-12 | 位相差フィルム、偏光板、およびこれらを使用した液晶表示素子 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070172604A1 (ja) |
EP (1) | EP1715365A4 (ja) |
JP (1) | JP2005227606A (ja) |
KR (1) | KR20070013272A (ja) |
CN (1) | CN100422771C (ja) |
TW (1) | TW200535468A (ja) |
WO (1) | WO2005078486A1 (ja) |
Cited By (2)
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EP2056133A1 (en) * | 2006-08-25 | 2009-05-06 | FUJIFILM Corporation | Glass |
US8388871B2 (en) * | 2006-04-07 | 2013-03-05 | Sumitomo Metal Mining Co., Ltd. | Translucent conductive film forming coating liquid, translucent conductive film, and dispersive type electroluminescent device |
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DE502005003977D1 (de) * | 2005-03-24 | 2008-06-19 | Schreiner Group Gmbh & Co Kg | Elektrolumineszenzelement |
JP2007099824A (ja) * | 2005-09-30 | 2007-04-19 | Fujifilm Corp | 環状オレフィン系樹脂フィルム、偏光板および液晶表示装置 |
JP2008101176A (ja) * | 2005-11-10 | 2008-05-01 | Fujifilm Corp | 組成物及び該組成物からなるフィルム、偏光板保護フィルム、光学補償フィルムならびに液晶表示装置 |
JP5023321B2 (ja) * | 2006-04-20 | 2012-09-12 | 国立大学法人山口大学 | 光アイソレータ |
KR101409612B1 (ko) * | 2006-07-31 | 2014-06-18 | 코니카 미놀타 어드밴스드 레이어즈 인코포레이티드 | 광학 필름의 제조 방법, 광학 필름, 그것을 이용한 편광판 및 화상 표시 장치 |
JP2008277267A (ja) * | 2007-04-03 | 2008-11-13 | Jsr Corp | 導電性透明シートおよびその用途 |
TWI448748B (zh) * | 2007-12-11 | 2014-08-11 | Sumitomo Chemical Co | 偏光板之套組,以及使用該偏光板套組之液晶面板及液晶顯示器 |
TWI386453B (zh) * | 2009-11-24 | 2013-02-21 | Taiwan Textile Res Inst | 用以製備光波長選擇性遮蔽薄層的組成物與方法以及含有該光波長選擇性遮蔽薄層的織物與光學元件 |
JP2011123326A (ja) * | 2009-12-11 | 2011-06-23 | Tosoh Corp | 光学素子及びその製造方法 |
JP5508189B2 (ja) * | 2010-08-10 | 2014-05-28 | 株式会社セイコーアドバンス | インキ、シート及び成形品 |
TWI534458B (zh) * | 2010-10-20 | 2016-05-21 | 3M新設資產公司 | 經保護之低折射率光學元件 |
FR2993797B1 (fr) * | 2012-07-24 | 2014-08-29 | Ecole Polytech | Procede de fabrication d'une couche mince solide minerale transparente et birefringente et composant optique a couche mince solide minerale transparente et birefringente |
JP2014035383A (ja) * | 2012-08-07 | 2014-02-24 | Dexerials Corp | 位相差素子、透明導電性素子、入力装置、表示装置および電子機器 |
JP2016157081A (ja) * | 2015-02-26 | 2016-09-01 | 日東電工株式会社 | 位相差層付偏光板および画像表示装置 |
KR102380157B1 (ko) * | 2015-03-04 | 2022-03-29 | 삼성디스플레이 주식회사 | 터치 패널 및 이를 포함하는 표시 장치 |
KR101712275B1 (ko) * | 2015-07-10 | 2017-03-03 | 강정남 | 차량내 유리에 부착하여 디스플레이 용도에 사용할 수 있는 특수필름 |
US10107946B2 (en) * | 2015-07-22 | 2018-10-23 | Nitto Denko Corporation | Polarizing plate with a retardation layer and image display apparatus |
TWI602700B (zh) * | 2016-12-29 | 2017-10-21 | 住華科技股份有限公司 | 偏光板及包含其之顯示裝置 |
JP2022029054A (ja) * | 2020-08-04 | 2022-02-17 | 株式会社サムスン日本研究所 | 樹脂膜、樹脂膜の作成方法および液晶パネル |
CN113851250B (zh) * | 2021-11-29 | 2022-03-29 | 西安宏星电子浆料科技股份有限公司 | 一种耐过载电压型电阻浆料及其制备方法和应用 |
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- 2005-01-12 US US10/588,656 patent/US20070172604A1/en not_active Abandoned
- 2005-01-12 CN CNB2005800048300A patent/CN100422771C/zh not_active Expired - Fee Related
- 2005-01-12 KR KR1020067018726A patent/KR20070013272A/ko not_active Application Discontinuation
- 2005-01-12 WO PCT/JP2005/000254 patent/WO2005078486A1/ja active Application Filing
- 2005-01-12 EP EP05703493A patent/EP1715365A4/en not_active Withdrawn
- 2005-01-28 TW TW094102779A patent/TW200535468A/zh unknown
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US8388871B2 (en) * | 2006-04-07 | 2013-03-05 | Sumitomo Metal Mining Co., Ltd. | Translucent conductive film forming coating liquid, translucent conductive film, and dispersive type electroluminescent device |
EP2056133A1 (en) * | 2006-08-25 | 2009-05-06 | FUJIFILM Corporation | Glass |
EP2056133A4 (en) * | 2006-08-25 | 2010-01-13 | Fujifilm Corp | GLASS |
Also Published As
Publication number | Publication date |
---|---|
EP1715365A1 (en) | 2006-10-25 |
KR20070013272A (ko) | 2007-01-30 |
TW200535468A (en) | 2005-11-01 |
US20070172604A1 (en) | 2007-07-26 |
JP2005227606A (ja) | 2005-08-25 |
CN1918493A (zh) | 2007-02-21 |
CN100422771C (zh) | 2008-10-01 |
EP1715365A4 (en) | 2009-12-16 |
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