WO2012090785A1 - 立体画像表示装置用複屈折レンズ材料、及び、立体画像表示装置用複屈折レンズの製造方法 - Google Patents
立体画像表示装置用複屈折レンズ材料、及び、立体画像表示装置用複屈折レンズの製造方法 Download PDFInfo
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- WO2012090785A1 WO2012090785A1 PCT/JP2011/079488 JP2011079488W WO2012090785A1 WO 2012090785 A1 WO2012090785 A1 WO 2012090785A1 JP 2011079488 W JP2011079488 W JP 2011079488W WO 2012090785 A1 WO2012090785 A1 WO 2012090785A1
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- stereoscopic image
- birefringent lens
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- BPVWEENNYMVAMH-FNORWQNLSA-N Cc(cc(/C=C/CCc(cc1)ccc1Cl)cc1)c1OC(c(cc1)ccc1OC(C=C)=O)=O Chemical compound Cc(cc(/C=C/CCc(cc1)ccc1Cl)cc1)c1OC(c(cc1)ccc1OC(C=C)=O)=O BPVWEENNYMVAMH-FNORWQNLSA-N 0.000 description 1
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- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
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- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/0403—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit the structure containing one or more specific, optionally substituted ring or ring systems
- C09K2019/0407—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit the structure containing one or more specific, optionally substituted ring or ring systems containing a carbocyclic ring, e.g. dicyano-benzene, chlorofluoro-benzene or cyclohexanone
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Definitions
- the present invention relates to a birefringent lens material used for stereoscopic image display and a method for manufacturing a birefringent lens for stereoscopic image display.
- 3D image display gives a sense of depth by sending individual almost flat images to the human right and left eyes, fusing them in the brain, and allowing them to be recognized three-dimensionally. For this reason, images for generating parallax must be individually formed and corrected when images are sent to each eye, or flat images must be separated for right eye recognition and left eye recognition.
- the method of separating a flat image does not require the use of polarizing glasses for image correction and can recognize a stereoscopic image with the naked eye.
- a method for separating a flat image there are a method using a lenticular lens, a parallax barrier method, and the like.
- the lenticular lens is a lens that separates two images by determining a width that allows one eye to recognize the same image by refraction by the lens, and a semi-cylindrical birefringent lens is used to generate parallax.
- a characteristic required for lenticular lenses is that the temperature change of the refractive index is small for use in a wide range of environments, and in order to meet this requirement, a cured liquid crystal polymer is used as a birefringent lens material. Techniques have been proposed (see Patent Document 1 and Non-Patent Document 1).
- Non-patent Document 1 Non-patent Document 1
- the problem to be solved by the present invention is to provide a birefringent lens material used for stereoscopic image display and a birefringent lens for stereoscopic image display, which are excellent in optical characteristics, durability, productivity, and particularly productivity.
- Another object of the present invention is to provide a method for producing a birefringent lens for stereoscopic image display having excellent productivity.
- the inventors of the present invention have intensively studied various liquid crystal monomers used for birefringent lenses, and as a result, can change the birefringence characteristics of the materials by using birefringent lens materials with increased types of specific liquid crystal monomers. In addition, the inventors have found that sufficient durability can be obtained and that curing at room temperature is possible, and the present invention has been completed.
- a birefringent lens material for stereoscopic image display comprising two or more liquid crystal compounds having at least one polymerizable functional group, and a stereoscopic image display formed by curing the lens material Birefringence for stereoscopic image display, characterized in that a birefringent lens is provided, and the lens material is applied onto an alignment film that is aligned in a uniaxial direction, cured with ultraviolet rays, and molded into a lens shape.
- a method for manufacturing a lens is provided.
- the birefringent lens material for stereoscopic image display and the birefringent lens for stereoscopic image display using the lens material of the present invention have excellent optical characteristics and durability by increasing the types of specific liquid crystal monomers, and are produced. Excellent in properties.
- the method for producing a birefringent lens material for stereoscopic image display using the material can suppress the occurrence of alignment defects in the liquid crystal monomer, and is excellent in productivity.
- the stereoscopic image display birefringent lens material of the present invention contains two or more liquid crystal compounds having at least one polymerizable functional group.
- the liquid crystal compound having one or more polymerizable functional groups preferably contains two or more liquid crystal compounds having at least two polymerizable functional groups from the viewpoint of durability.
- the liquid crystal compound having at least two polymerizable functional groups is preferably contained in an amount of 10% to 95% by weight, and more preferably 15% to 90% by weight.
- the liquid crystal compounds having a polymerizable functional group are preferably the same mesogenic group or mesogenic supporting group.
- the liquid crystal compound having a polymerizable functional group is represented by the general formula (1)
- P represents a polymerizable functional group
- Sp represents a spacer group having 0 to 18 carbon atoms
- m represents 0 or 1
- MG represents a mesogenic group or a mesogenic supporting group
- R 1 represents ,
- a halogen atom, a cyano group, a thiocyanato group, a hydroxy group, an NCO group, an OCN group or an alkyl group having 1 to 18 carbon atoms, wherein the alkyl group is represented by one or more halogen atoms, a cyano group, or a hydroxy group may be substituted, independently each two or more CH 2 groups not one CH 2 group or adjacent present in this group to each other, in a manner that oxygen atoms are not directly bonded to each other, - O—, —S—, —NH—, —N (CH 3 ) —, —CO—, —COO—, —OCO—, —OCOO—, —SCO—, —
- P represents a reactive functional group
- Sp represents a spacer group having 0 to 18 carbon atoms
- m represents 0 or 1
- P represents a reactive functional group
- Sp represents a spacer group having 0 to 18 carbon atoms
- m represents 0 or 1
- the birefringent lens material for stereoscopic image display of the present invention has a transition temperature from a solid phase to a liquid crystal phase of ⁇ 10 ° C. or lower and a transition temperature from a liquid crystal phase to a liquid phase of 50 ° C. or higher.
- the transition temperature from the solid phase to the liquid crystal phase is 0 ° C. or lower, and the transition temperature from the liquid crystal phase to the liquid phase is preferably 40 ° C. or higher.
- the birefringent lens material for stereoscopic image display of the present invention is preferably one that can be polymerized at room temperature of 20 ° C. to 30 ° C.
- the liquid crystal compound having one polymerizable functional group exhibits liquid crystallinity alone or in a composition with another liquid crystal compound.
- the compound is not particularly limited as long as it is a compound having one polymerizable functional group, and a known and commonly used compound can be used.
- a rod-like polymerizable liquid crystal compound having a polymerizable functional group such as a vinyl group, an acrylic group or a (meth) acryl group, or a maleimide as described in JP-A Nos. 2004-2373 and 2004-99446
- a rod-like polymerizable liquid crystal compound having a group examples thereof include a rod-like polymerizable liquid crystal compound having a group.
- a rod-like liquid crystal compound having a polymerizable group is preferable because it can easily produce a liquid crystal having a temperature range around room temperature.
- P represents a polymerizable functional group
- Sp represents a spacer group having 0 to 18 carbon atoms
- m represents 0 or 1
- MG represents a mesogenic group or a mesogenic supporting group
- R 1 represents ,
- a halogen atom, a cyano group, a thiocyanato group, a hydroxy group, an NCO group, an OCN group or an alkyl group having 1 to 18 carbon atoms, wherein the alkyl group is represented by one or more halogen atoms, a cyano group, or a hydroxy group may be substituted, independently each two or more CH 2 groups not one CH 2 group or adjacent present in this group to each other, in a manner that oxygen atoms are not directly bonded to each other, - O—, —S—, —NH—, —N (CH 3 ) —, —CO—, —COO—, —OCO—, —OCOO—, —SCO—, —
- each polymerizable functional group may have a substituent such as a halogen atom, a methyl group, a trifluoromethyl group,
- the mesogenic group or mesogenic support group of the compound represented by the general formula (1) is composed of a ring structure and a group linking the ring structure.
- the general formula (1-1) is composed of a ring structure and a group linking the ring structure.
- MG 1 and MG 2 each independently represent one or more ring structures
- Sp 1 , Sp 2 and Sp 3 each independently represents a single bond or a divalent organic group
- n is 1
- one ring structure can be a mesogenic group or mesogenic group, it represents 0 to 5.
- two or more ring structures can be a mesogenic group or mesogenic group, it represents 1 to 6.
- MG 1 and MG 2 having at least one ring structure are as follows:
- Sp represents a single bond or an alkylene group (the alkylene group may be substituted with one or more halogen atoms or CN, and is present in this group).
- A1, A2, and A3 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexenyl group, tetrahydropyran-2,5-diyl group, 1, 3-dioxane-2,5-diyl group, tetrahydrothiopyran-2,5-diyl group, 1,4-bicyclo (2,2,2) octylene group, decahydronaphthalene-2,6-diyl group, pyridine- 2,5-diyl group, pyrimidine-2,5-diyl group, pyrazine-2,5-diyl group, thiophene-2,5-diyl group-, 1,2,3,4-tetrahydronaphthalene-2,6- Diyl group, 1,4-naphthylene group, 1,5-naphthylene group, 1,6-naphthylene group, 2,
- Polymerizable functional groups are represented by the general formulas (P-1) to (P-18)
- Acrylic group, (meth) acrylic group, acrylamide group, vinyl group, vinyl ether group, glycidyl group, glycidyl ether group, oxetanyl group, oxetanyl ether group, maleimide group, maleimide carboxyl group, thiol group, etc. are preferable, and productivity From these viewpoints, a vinyl ether group, an acryl group, a (meth) acryl group, a glycidyl group, and a glycidyl ether group are particularly preferable.
- the liquid crystal compound having one polymerizable functional group is further represented by the general formulas (3) and (4).
- Z 1 and Z 3 each independently represent a hydrogen atom, a halogen atom, a cyano group or a hydrocarbon group having 1 to 18 carbon atoms
- Z 2 and Z 4 each independently represent a hydrogen atom or methyl
- t and u independently represents 0, 1 or 2
- v represents an integer of 2 to 18
- W 3 represents a single bond, —O—, —COO— or —OCO—
- A, B, C, D, E and F are each independently a 1,4-phenylene group, a 1,4-phenylene group in which a non-adjacent CH group is substituted with nitrogen, a 1,4-cyclohexylene group, 1 1,4-cyclohexylene group, 1,4-cyclohexenyl group, 1,4-bicyclo (2,2,2) octylene group in which two or two non-adjacent CH 2 groups are substituted with oxygen or sulfur atoms, deca Hydronaphthalene-2,6-
- liquid crystal compounds (Wherein m represents an integer of 2 to 18, n represents an integer of 0 to 18, R represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a carboxyl group, In the case where these groups are alkyl groups having 1 to 6 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, they are all unsubstituted or substituted by one or more halogen atoms. These liquid crystal compounds may be used alone or in combination of two or more.
- liquid crystal compound having two or more polymerizable functional groups used in the birefringent lens material for stereoscopic image display of the present invention exhibits liquid crystallinity alone or in a composition with another liquid crystal compound. If it is a compound which has two or more polymerizable functional groups, there will be no limitation in particular and a well-known and usual thing can be used.
- a rod-like liquid crystal compound having a polymerizable group is preferable because it can easily produce a liquid crystal having a temperature range around room temperature.
- P represents a polymerizable functional group
- Sp represents a spacer group having 0 to 18 carbon atoms
- m represents 0 or 1
- MG represents a mesogenic group or a mesogenic supporting group
- R 1 represents Formula (1-a)
- each polymerizable functional group may have a substituent such as a halogen atom, a methyl group, a trifluoromethyl group, or the like as long as it does not inhibit the polymerizability.
- the mesogenic group or mesogenic support group of the general formula (1) is composed of a ring structure and a group linking the ring structure.
- the general formula (1-1) is composed of a ring structure and a group linking the ring structure.
- MG 1 and MG 2 each independently represent one or more ring structures
- Sp 1 , Sp 2 and Sp 3 each independently represents a single bond or a divalent organic group
- n is 1
- one ring structure can be a mesogenic group or mesogenic group, it represents 0 to 5.
- two or more ring structures can be a mesogenic group or mesogenic group, it represents 1 to 6.
- MG 1 and MG 2 having at least one ring structure are as follows:
- Sp represents a single bond or an alkylene group (the alkylene group may be substituted with one or more halogen atoms or CN, and is present in this group).
- Each CH 2 group or two or more non-adjacent CH 2 groups independently of each other in a form in which oxygen atoms are not directly bonded to each other, —O—, —S—, —NH—, — N (CH 3 ) —, —CO—, —COO—, —OCO—, —OCOO—, —SCO—, —COS— or —C ⁇ C— may be substituted.
- MG is the general formula (1-b)
- A1, A2, and A3 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexenyl group, tetrahydropyran-2,5-diyl group, 1, 3-dioxane-2,5-diyl group, tetrahydrothiopyran-2,5-diyl group, 1,4-bicyclo (2,2,2) octylene group, decahydronaphthalene-2,6-diyl group, pyridine- 2,5-diyl group, pyrimidine-2,5-diyl group, pyrazine-2,5-diyl group, thiophene-2,5-diyl group-, 1,2,3,4-tetrahydronaphthalene-2,6- Diyl group, 2,6-naphthylene group, phenanthrene-2,7-diyl group, 9,10-dihydrophenant
- Polymerizable functional groups are represented by the general formulas (P-1) to (P-18)
- An acrylic group as shown in (meth) acrylic group, acrylamide group, vinyl group, vinyl ether group, glycidyl group, glycidyl ether group, oxetanyl group, oxetanyl ether group, maleimide group, maleimide carboxyl group, thiol group, etc. are preferable.
- a vinyl ether group, an acrylic group, a (meth) acryl group, a glycidyl group, and a glycidyl ether group are particularly preferable.
- Liquid crystal compounds having two or more polymerizable functional groups are further represented by the general formulas (2a) and (2b).
- Z 10 and Z 11 each independently represent a hydrogen atom or a methyl group
- m and m 1 each represents 0 or 1
- W 1 , W 11 , W 2 and W 12 each independently represent a single bond.
- -O-, -COO- or -OCO-, Y 0 , Y 1 , Y 2 and Y 11 each independently represent -COO- or -OCO-
- r, r1, s and s1 each represents Independently represents an integer of 2 to 18, but the 1,4-phenylene group present in the formula is an alkyl group having 1 to 7 carbon atoms, an alkoxy group, an alkanoyl group, a cyano group, or a halogen atom.
- a compound selected from the group of compounds represented by formula (1) may be substituted.
- n and n each independently represents an integer of 1 to 18, and R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or a cyano group.
- R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or a cyano group.
- these groups are alkyl groups having 1 to 6 carbon atoms or alkoxy groups having 1 to 6 carbon atoms, they may be all unsubstituted or substituted with one or more halogen atoms.
- These liquid crystal compounds can be used alone or in combination of two or more.
- the birefringent lens material for stereoscopic image display of the present invention can also use a polymerization initiator to polymerize a liquid crystal compound having a polymerizable functional group.
- a polymerization initiator used when the polymerization is carried out by light irradiation, known and conventional ones can be used.
- the amount of the photopolymerization initiator used is preferably 0.1 to 10% by mass, particularly preferably 0.5 to 5% by mass, based on the birefringent lens material for stereoscopic image display. These can be used alone or in combination of two or more.
- thermal polymerization initiator used in the thermal polymerization known ones can be used.
- methyl acetoacetate peroxide cumene hydroperoxide, benzoyl peroxide, bis (4-t-butylcyclohexyl) Peroxydicarbonate, t-butylperoxybenzoate, methyl ethyl ketone peroxide, 1,1-bis (t-hexylperoxy) 3,3,5-trimethylcyclohexane, p-pentahydroperoxide, t-butylhydroper Organic peroxides such as oxide, dicumyl peroxide, isobutyl peroxide, di (3-methyl-3-methoxybutyl) peroxydicarbonate, 1,1-bis (t-butylperoxy) cyclohexane, 2,2 '-Azobisisobutyronitrile 2,2′-azobis (2,4-dimethylvaleronitrile) and other azon
- the amount of the thermal polymerization initiator used is preferably from 0.1 to 10% by mass, particularly preferably from 0.5 to 5% by mass, based on the birefringent lens material for stereoscopic image display. These can be used alone or in combination of two or more. Moreover, it can also use together with a photoinitiator.
- a polymerization inhibitor In order to produce the birefringent lens material for stereoscopic image display of the present invention stably or to store it stably, a polymerization inhibitor can also be used.
- the polymerization inhibitor include phenol compounds, quinone compounds, amine compounds, thioether compounds, nitroso compounds, and the like.
- phenolic compounds include p-methoxyphenol, cresol, t-butylcatechol, 3.5-di-t-butyl-4-hydroxytoluene, 2.2'-methylenebis (4-methyl-6-t-butylphenol) 2.2′-methylenebis (4-ethyl-6-tert-butylphenol), 4.4′-thiobis (3-methyl-6-tert-butylphenol), 4-methoxy-1-naphthol, 4,4′- Dialkoxy-2,2′-bi-1-naphthol, and the like.
- quinone compounds include hydroquinone, methylhydroquinone, tert-butylhydroquinone, p-benzoquinone, methyl-p-benzoquinone, tert-butyl-p-benzoquinone, 2,5-diphenylbenzoquinone, 2-hydroxy-1,4-naphthoquinone 1,4-naphthoquinone, 2,3-dichloro-1,4-naphthoquinone, anthraquinone, diphenoquinone and the like.
- amine compounds include p-phenylenediamine, 4-aminodiphenylamine, N.I. N'-diphenyl-p-phenylenediamine, Ni-propyl-N'-phenyl-p-phenylenediamine, N- (1.3-dimethylbutyl) -N'-phenyl-p-phenylenediamine, N.I. N′-di-2-naphthyl-p-phenylenediamine, diphenylamine, N-phenyl- ⁇ -naphthylamine, 4.4′-dicumyl-diphenylamine, 4.4′-dioctyl-diphenylamine and the like.
- thioether compounds include phenothiazine and distearyl thiodipropionate.
- nitroso compounds include N-nitrosodiphenylamine, N-nitrosophenylnaphthylamine, N-nitrosodinaphthylamine, p-nitrosophenol, nitrosobenzene, p-nitrosodiphenylamine, ⁇ -nitroso- ⁇ -naphthol, and the like, N, N-dimethyl p-nitrosoaniline, p-nitrosodiphenylamine, p-nitronedimethylamine, p-nitrone-N, N-diethylamine, N-nitrosoethanolamine, N-nitrosodi-n-butylamine, N-nitroso-Nn-butyl- 4-butanolamine, N-nitroso-diisopropanolamine, N-nitroso-N-ethyl-4-butanolamine, 5-nitroso-8-hydroxyquinoline, N-nitrosomorpholine, N-nitros
- a general-purpose additive can be used for obtaining a coating film having a uniform film thickness or according to each purpose.
- additives such as a leveling agent, a thixo agent, a surfactant, an ultraviolet absorber, an infrared absorber, an antioxidant, and a surface treatment agent can be added to such an extent that the liquid crystal alignment ability is not significantly reduced.
- the birefringent lens material for stereoscopic image display of the present invention does not normally use a solvent, but a solvent can also be used for uniform application.
- the solvent used is a solvent to be used if the polymerizable liquid crystal composition of the present invention can be aligned without defects when the substrate or the alignment film formed on the substrate is not completed when coated on the substrate.
- the solvent in which a polymeric liquid crystal compound shows favorable solubility is preferable.
- solvents examples include aromatic hydrocarbons such as toluene, xylene, cumene, and mesitylene, ester solvents such as methyl acetate, ethyl acetate, propyl acetate, and butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone.
- aromatic hydrocarbons such as toluene, xylene, cumene, and mesitylene
- ester solvents such as methyl acetate, ethyl acetate, propyl acetate, and butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone.
- Ketone solvents tetrahydrofuran, 1,2-dimethoxyethane, ether solvents such as anisole, amide solvents such as N, N-dimethylformamide, N-methyl-2-pyrrolidone, propylene glycol monomethyl ether acetate, diethylene glycol monomethyl ether Examples include acetate, ⁇ -butyrolactone, chlorobenzene and the like. These can be used alone or in combination of two or more.
- the birefringent lens material for stereoscopic image display according to the present invention promotes the homogeneous orientation as necessary when it takes a homogeneously oriented state by simply applying it in the process of producing the birefringent lens for stereoscopic image display.
- a surfactant or polymer is used.
- the surfactant to be used is not particularly limited, but a surfactant having a smaller surface tension than the liquid crystal compound having a polymerizable functional group is preferable.
- examples of such surfactants include fluorine-containing nonionic surfactants, organosilane surfactants, polyacrylate surfactants, and the like.
- the surfactant may have a polymerizable group in order to form a stronger film when polymerized.
- the polymer to be used is not particularly limited, but a polymer having a smaller surface tension than the liquid crystal compound having a polymerizable functional group is preferable.
- polystyrene resin examples include polyethylene, polypropylene, polyisobutylene, paraffin, liquid paraffin, chlorinated polypropylene, chlorinated paraffin, chlorinated liquid paraffin, and polyvinylidene fluoride.
- the polymer preferably has a weight average molecular weight of 200 to 1,000,000, more preferably 300 to 100,000, and particularly preferably 400 to 10,000.
- the base material used for the birefringent lens for stereoscopic image display of the present invention is a base material normally used for liquid crystal devices, displays, optical components and optical films, and is coated with the birefringent lens material for stereoscopic image display of the present invention.
- a substrate include a glass substrate, a metal substrate, a ceramic substrate, and a plastic substrate.
- the substrate when the substrate is an organic material, examples thereof include cellulose derivatives, polyolefins, polyesters, polyolefins, polycarbonates, polyacrylates, polyarylates, polyether sulfones, polyimides, polyphenylene sulfides, polyphenylene ethers, nylons, polystyrenes, and the like.
- polyester, polystyrene, polyolefin, cellulose derivative, polyarylate, and polycarbonate are preferable.
- the base material is usually subjected to an orientation treatment or orientation film so that the birefringent lens material for stereoscopic image display is oriented when the birefringent lens material for stereoscopic image display of the present invention is applied.
- orientation treatment include stretching treatment, rubbing treatment, polarized ultraviolet visible light irradiation treatment, ion beam treatment, and the like.
- the alignment film is used, a known and conventional alignment film is used.
- Such alignment films include polyimide, polysiloxane, polyamide, polyvinyl alcohol, polycarbonate, polystyrene, polyphenylene ether, polyarylate, polyethylene terephthalate, polyether sulfone, epoxy resin, epoxy acrylate resin, acrylic resin, coumarin compound, chalcone.
- the compound include compounds, cinnamate compounds, fulgide compounds, anthraquinone compounds, azo compounds, and arylethene compounds.
- the compound subjected to the alignment treatment by rubbing is preferably an alignment treatment or a compound in which crystallization of the material is promoted by inserting a heating step after the alignment treatment.
- the application method for obtaining the birefringent lens for stereoscopic image display of the present invention includes applicator method, bar coating method, spin coating method, gravure printing method, flexographic printing method, ink jet method, die coating method, cap coating method, dipping. Etc., a well-known and usual method can be performed.
- a birefringent lens material for stereoscopic image display diluted with a solvent it is dried after application.
- the birefringent lens for stereoscopic image display of the present invention is molded by polymerizing the birefringent lens material for stereoscopic image display into a lens shape using a photomask, or by applying a coating film of the birefringent lens material for stereoscopic image display as a lens. This is done by covering with a resin mold.
- the coating film of the birefringent lens material for stereoscopic image display is a concave lens-shaped resin mold having a refractive index equal to the ordinary refractive index (no) of the birefringent lens material for stereoscopic image display of the present invention. Cover and polymerize in the covered state. When the resin mold is once removed, the polymerization is performed after applying the resin used for the resin mold to the coating film of the birefringent lens material for stereoscopic image display from which the resin mold is removed.
- the polymerization operation of the birefringent lens material for stereoscopic image display of the present invention is generally carried out by applying a birefringent lens material for stereoscopic image display, forming it into a lens shape, and then irradiating it with light such as ultraviolet rays or heating.
- light irradiation specifically, irradiation with ultraviolet light of 390 nm or less is preferable, and irradiation with light having a wavelength of 250 to 370 nm is most preferable.
- the polymerizable liquid crystal composition causes decomposition or the like due to ultraviolet light of 390 nm or less, it may be preferable to perform polymerization treatment with ultraviolet light of 390 nm or more.
- This light is preferably diffused light and unpolarized light.
- the polymerization by heating is preferably performed at a temperature at which the birefringent lens material for stereoscopic image display exhibits a liquid crystal phase or at a temperature lower than that, particularly when a thermal polymerization initiator that releases radicals by heating is used. It is preferable to use one having a temperature within the above temperature range.
- the thermal polymerization initiator and the photopolymerization initiator are used in combination, the polymerization temperature and the polymerization temperature are set so that the polymerization speeds of both the photo-alignment film and the polymerizable liquid crystal film are not greatly different together with the limitation of the temperature range. It is preferred to select each initiator.
- the heating temperature depends on the transition temperature from the liquid crystal phase to the isotropic phase of the polymerizable liquid crystal composition
- the heating temperature is preferably lower than the temperature at which inhomogeneous polymerization is induced by heat.
- the glass transition point of the base material made of an organic material is exceeded, thermal deformation of the base material becomes remarkable, and therefore, the glass transition point of the base material to the base material is preferable.
- a polymeric group is a (meth) acryloyl group
- the birefringent lens for stereoscopic image display can be heat-treated in order to stabilize the solvent resistance and heat resistance of the obtained birefringent lens for stereoscopic image display.
- heating within a range not exceeding the glass transition point of a base material made of an organic material is preferable.
- light irradiation treatment can also be performed.
- the liquid crystal compound component in the birefringent lens for stereoscopic image display is not photodegraded by light irradiation.
- the obtained birefringent lens for stereoscopic image display may be used integrally with the base material while leaving the base material (see FIG. 2), and does not have a base material by peeling from the base material. It can also be used with only the lens (see FIG. 1).
- birefringent lens material (1) for stereoscopic image display 50 parts of a liquid crystal compound represented by the formula (B-1), 20 parts of a liquid crystal compound represented by the formula (B-2), 0.1 part of Darocur TPO (C-1), p-methoxyphenol (D-1 ) 0.1 part was heated and mixed to obtain a birefringent lens material (1) for stereoscopic image display of the present invention.
- birefringent lens materials (2) to (20) for stereoscopic image display were obtained in the same manner as the preparation of the birefringent lens material (1) for stereoscopic image display of the present invention.
- Tables 1 to 5 show specific compositions of the birefringent lens materials (1) to (20) for stereoscopic image display of the present invention.
- Irgacure 651 (C-2) (manufactured by BASF) Irgacure 907 (C-3) (BASF)
- Kinopower LSN (D-2) (manufactured by Kawasaki Kasei Kogyo Co., Ltd.)
- Butyl acrylate (E-1) (manufactured by Toagosei Co., Ltd.)
- IRGANOX 1076 (E-2) (BASF) Cyclopentanone (F-1)
- Example 1 The polyimide solution for alignment film was applied to a glass substrate having a thickness of 0.7 mm using a spin coating method, dried at 100 ° C. for 10 minutes, and then baked at 200 ° C. for 60 minutes to obtain a coating film. The obtained coating film was rubbed. The rubbing treatment was performed using a commercially available rubbing apparatus.
- the birefringent lens material (1) for stereoscopic image display of the present invention was applied to the rubbed substrate by a spin coating method while being heated to 70 ° C.
- the base material rubbed on the obtained coating film was placed so that the rubbing direction was antiparallel, and then cooled to room temperature. Thereafter, UV light was irradiated for 25 seconds at an intensity of 40 mW / cm 2 using a high-pressure mercury lamp.
- UV light was irradiated for 25 seconds at an intensity of 40 mW / cm 2 using a high-pressure mercury lamp.
- cured material of the birefringent lens material for stereoscopic image display of this invention was obtained.
- the obtained cured product had a film thickness of 50 ⁇ m, no of 1.537, ne of 1.701, and ⁇ n of 0.165.
- the orientation was also good.
- the transition temperature from the solid phase to the liquid crystal phase was ⁇ 21 ° C., and the transition temperature from the
- Example 2 to 14 In the same manner as Example 1, a cured product of the birefringent lens material for stereoscopic image display of the invention of Examples 2 to 13 was obtained. Each cured product had a film thickness of 50 ⁇ m and good orientation. The results obtained are shown in Table 3.
- the stereoscopic image display birefringent lens material of the present invention can be polymerized at room temperature, has good orientation, and is excellent in productivity.
- Example 15 The polyimide solution for alignment film was applied to a glass substrate having a thickness of 0.7 mm using a spin coating method, dried at 100 ° C. for 10 minutes, and then baked at 200 ° C. for 60 minutes to obtain a coating film. The obtained coating film was rubbed. The rubbing treatment was performed using a commercially available rubbing apparatus. The birefringent lens material (15) for stereoscopic image display of the present invention was applied to the rubbed substrate 3 while being heated to 70 ° C. by a spin coating method. The resin mold 1 subjected to the alignment treatment on the obtained coating film was arranged so that the alignment direction of the rubbed substrate and the alignment direction of the resin mold 1 were parallel, and then cooled to room temperature.
- Example 16 The polyimide solution for alignment film was applied to a glass substrate having a thickness of 0.7 mm using a spin coating method, dried at 100 ° C. for 10 minutes, and then baked at 200 ° C. for 60 minutes to obtain a coating film. The obtained coating film was rubbed. The rubbing treatment was performed using a commercially available rubbing apparatus. The birefringent lens material (15) for stereoscopic image display of the present invention was applied to the rubbed substrate 3 while being heated to 70 ° C. by a spin coating method. The resin mold 1 subjected to the alignment treatment on the obtained coating film was arranged so that the alignment direction of the rubbed substrate and the alignment direction of the resin mold 1 were parallel, and then cooled to room temperature.
- the resin mold 1 was slowly removed, and an ultraviolet curable epoxy acrylate resin was applied by spin coating. Thereafter, UV light was irradiated for 25 seconds at an intensity of 40 mW / cm 2 using a high-pressure mercury lamp.
- UV light was irradiated for 25 seconds at an intensity of 40 mW / cm 2 using a high-pressure mercury lamp.
- the obtained birefringent lens for stereoscopic image display of the present invention had no defects and good orientation.
- Example 17 The polyimide solution for alignment film was applied to a glass substrate having a thickness of 0.7 mm using a spin coating method, dried at 100 ° C. for 10 minutes, and then baked at 200 ° C. for 60 minutes to obtain a coating film. The obtained coating film was rubbed. The rubbing treatment was performed using a commercially available rubbing apparatus.
- the birefringent lens for stereoscopic image display shown in FIG. 2 was obtained.
- the obtained birefringent lens for stereoscopic image display of the present invention had no defects and good orientation.
- the transition temperature from the solid phase to the liquid crystal phase is ⁇ 26 ° C.
- the transition temperature from the liquid crystal phase to the liquid phase is 96 ° C. Met.
- the structure of the birefringent lens for stereoscopic image display of this invention is shown.
- the structure of the birefringent lens (with a base material) for stereoscopic image display of the present invention is shown.
- Resin mold 2 Birefringent lens 3: Base material
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Abstract
Description
少なくとも1つ以上の重合性官能基を有する液晶化合物を2種類以上含有することを特徴とする立体画像表示用複屈折レンズ材料、当該レンズ材料の硬化により形成されたことを特徴とする立体画像表示用複屈折レンズを提供し、併せて当該レンズ材料を、一軸方向に配向処理された配向膜上に塗布し、紫外線で硬化させてレンズ状に成形することを特徴とする立体画像表示用複屈折レンズの製造方法を提供する。
本発明の立体画像表示用複屈折レンズ材料において、重合性官能基を1つ有する液晶化合物は、単独または他の液晶化合物との組成物において液晶性を示す。重合性官能基を1つ有する化合物であれば、特に限定はなく、公知慣用のものを用いることができる。
一般式(1)で表される化合物の重合性官能基は、公知慣用の重合性官能基が用いられ、例えば、ビニル基、アリル基、スチリル基、ビニルエーテル基、アリルエーテル基、アクリル基、(メタ)アクリル基、アクリルアミド基、(メタ)アクリルアミド基、グリシジル基、グリシジルエーテル基、オキセタニル基、オキセタニルエーテル基、シアヌル基、イソシアヌル基、マレイミド基、マレイミドカルボキシル基、チオール基、フマル酸ジアルキル基、アセチレニル基、オルガノシリル基、環化または開環重合可能な官能基等が挙げられる。また、各々の重合性官能基には、ハロゲン原子、メチル基、トリフルオロメチル基等、重合性を阻害しない範囲で置換基を有することもできる。
で表される。
本発明の立体画像表示用複屈折レンズ材料で用いられる、重合性官能基を2つ以上有する液晶化合物は、単独または他の液晶化合物との組成物において液晶性を示す。重合性官能基を2つ以上有する化合物であれば、特に限定はなく、公知慣用のものを用いることができる。
一般式(1)のメソゲン基又はメソゲン性支持基は、環構造と環構造を連結する基からなり、例えば一般式(1-1)
で表される。
より具体的には、一般式(1)において、Spが単結合、あるいはアルキレン基を表し、(該アルキレン基は1つ以上のハロゲン原子又はCNにより置換されていても良く、この基中に存在する1つのCH2基又は隣接していない2つ以上のCH2基はそれぞれ相互に独立して、酸素原子が相互に直接結合しない形で、-O-、-S-、-NH-、-N(CH3)-、-CO-、-COO-、-OCO-、-OCOO-、-SCO-、-COS-又は-C≡C-により置き換えられていても良い。)
MGが一般式(1-b)
重合性官能基を2つ以上有する液晶化合物は、さらには、一般式(2a)及び(2b)
本発明の立体画像表示用複屈折レンズ材料は、重合性官能基を有する液晶化合物を重合させるために重合開始剤を用いることもできる。重合を光照射によって行う場合に使用する光重合開始剤としては公知慣用のものが使用できる。
本発明の立体画像表示用複屈折レンズ材料は、安定的に生産するため、または、安定的に保存するために、重合禁止剤を使用することもできる。重合禁止剤としては、フェノール系化合物、キノン系化合物、アミン系化合物、チオエーテル系化合物、ニトロソ化合物、等が挙げられる。
本発明の立体画像表示用複屈折レンズ材料は、膜厚の均一な塗布膜を得るため、あるいは、各々の目的に応じて汎用の添加剤を使用することもできる。例えば、レベリング剤、チキソ剤、界面活性剤、紫外線吸収剤、赤外線吸収剤、抗酸化剤、表面処理剤等の添加剤を液晶の配向能を著しく低下させない程度添加することができる。
本発明の立体画像表示用複屈折レンズ材料は、通常は溶剤を使用しないが、均一に塗布するために溶剤を用いることもできる。用いられる溶剤は、基材上に塗布した際に基材、あるいは、基材上に形成されている配向膜を完全させず、本発明の重合性液晶組成物が欠陥なく配向できれば、使用する溶剤としては特に限定はないが、重合性液晶化合物が良好な溶解性を示す溶媒が好ましい。そのような溶剤としては、例えば、トルエン、キシレン、クメン、メシチレン等の芳香族系炭化水素、酢酸メチル、酢酸エチル、酢酸プロピル、酢酸ブチル等のエステル系溶剤、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン等のケトン系溶剤、テトラヒドロフラン、1,2-ジメトキシエタン、アニソール等のエーテル系溶剤、N,N-ジメチルホルムアミド、N-メチル-2-ピロリドン、等のアミド系溶剤、プロピレングリコールモノメチルエーテルアセテート、ジエチレングリコールモノメチルエーテルアセテート、γ-ブチロラクトン、クロロベンゼン等が挙げられる。これらは、単独で使用することもできるし、2種類以上混合して使用することもできる。
本発明の立体画像表示用複屈折レンズ材料は、立体画像表示用複屈折レンズを製造する工程の中で塗布するだけで一旦ホモジニアス配向した状態をとる場合は、必要に応じてホモジニアス配向を促進する界面活性剤、または高分子を用いる。
用いる高分子に特に限定はないが、重合性官能基を有する液晶化合物よりも表面張力が小さい高分子が好ましい。そのような高分子としては、例えば、ポリエチレン、ポリプロピレン、ポリイソブチレン、パラフィン、流動パラフィン、塩素化ポリプロピレン、塩素化パラフィン、又は塩素化流動パラフィン、ポリフッ化ビニリデン、等が挙げられる。
前記高分子の重量平均分子量は200~1000000であることが好ましく、300~100000であることがさらに好ましく、400~10000であることが特に好ましい。
(基材)
本発明の立体画像表示用複屈折レンズに用いられる基材は、液晶デバイス、ディスプレイ、光学部品や光学フィルムに通常使用する基材であって、本発明の立体画像表示用複屈折レンズ材料を塗布後、あるいは、液晶デバイス製造時における加熱に耐えうる耐熱性を有する材料であれば、特に制限はない。そのような基材としては、ガラス基材、金属基材、セラミックス基材やプラスチック基材等が挙げられる。特に基材が有機材料の場合、セルロース誘導体、ポリオレフィン、ポリエステル、ポリオレフィン、ポリカーボネート、ポリアクリレート、ポリアリレート、ポリエーテルサルホン、ポリイミド、ポリフェニレンスルフィド、ポリフェニレンエーテル、ナイロン、ポリスチレン等が挙げられる。中でもポリエステル、ポリスチレン、ポリオレフィン、セルロース誘導体、ポリアリレート、ポリカーボネートが好ましい。
本発明の立体画像表示用複屈折レンズを得るための塗布法としては、アプリケーター法、バーコーティング法、スピンコーティング法、グラビア印刷法、フレキソ印刷法、インクジェット法、ダイコーティング法、キャップコーティング法、ディッピング等、公知慣用の方法を行うことができる。溶剤で希釈した立体画像表示用複屈折レンズ材料を塗布する場合は、塗布後は乾燥させることになる。
本発明の立体画像表示用複屈折レンズの成型は、フォトマスクを用いて立体画像表示用複屈折レンズ材料をレンズ状に重合するか、又は、立体画像表示用複屈折レンズ材料の塗布膜をレンズ状樹脂金型で覆うことで行う。
本発明の立体画像表示用複屈折レンズ材料の重合操作については、立体画像表示用複屈折レンズ材料塗布、レンズ状に成型した後、一般に紫外線等の光照射、あるいは加熱によって行われる。重合を光照射で行う場合は、具体的には390nm以下の紫外光を照射することが好ましく、250~370nmの波長の光を照射することが最も好ましい。但し、390nm以下の紫外光により重合性液晶組成物が分解などを引き起こす場合は、390nm以上の紫外光で重合処理を行ったほうが好ましい場合もある。この光は、拡散光で、かつ偏光していない光であることが好ましい。
式(B-1)で表される液晶化合物50部、式(B-2)で表される液晶化合物20部、ダロキュアTPO(C-1)0.1部、p-メトキシフェノール(D-1)0.1部を加熱混合して本発明の立体画像表示用複屈折レンズ材料(1)を得た。
本発明の立体画像表示用複屈折レンズ材料(1)の調製と同様にして本発明の立体画像表示用複屈折レンズ材料(2)~(20)を得た。表1~5に、本発明の立体画像表示用複屈折レンズ材料(1)~(20)の具体的な組成を示す。
イルガキュア907(C-3)(BASF社製)
キノパワーLSN(D-2)(川崎化成工業株式会社製)
アクリル酸ブチル(E-1)(東亞合成株式会社製)
IRGANOX1076(E-2)(BASF社製)
シクロペンタノン(F-1)
配向膜用ポリイミド溶液を厚さ0.7mmのガラス基材にスピンコート法を用いて塗布し、100℃で10分乾燥した後、200℃で60分焼成することにより塗膜を得た。得られた塗膜をラビング処理した。ラビング処理は、市販のラビング装置を用いて行った。
実施例1と同様にして、実施例2~13の発明の立体画像表示用複屈折レンズ材料の硬化物を得た。いずれの硬化物も膜厚は50μmで配向性は良好であった。得られた結果は表3に示している。
実施例1と同様にして、比較例1~4の立体画像表示用複屈折レンズ材料の硬化物を得た。得られた硬化物は、室温で重合した際に結晶化が顕著で配向不良が多数観察された。得られた結果は、表4に示している。
配向膜用ポリイミド溶液を厚さ0.7mmのガラス基材にスピンコート法を用いて塗布し、100℃で10分乾燥した後、200℃で60分焼成することにより塗膜を得た。得られた塗膜をラビング処理した。ラビング処理は、市販のラビング装置を用いて行った。
ラビングした基材3に本発明の立体画像表示用複屈折レンズ材料(15)を70℃に温めた状態のままスピンコート法で塗布した。得られた塗布膜の上に配向処理が施された樹脂金型1をラビングした基材の配向方向と樹脂金型1の配向方向が並行になるように配置した後、室温まで冷却した。その後、高圧水銀ランプを用いて、40mW/cm2の強度で25秒間紫外線光照射した。このようにして立体画像表示用複屈折レンズを得た。得られたレンズから基材3を取り外すことで図1に示される立体画像表示用複屈折レンズを得た。得られた本発明の立体画像表示用複屈折レンズは、欠陥がなく配向性も良好であった。なお、本発明の立体画像表示用複屈折レンズ材料(15)の固体相から液晶相への転移温度は、-25℃、液晶相から液体相への転移温度は87℃であった。
配向膜用ポリイミド溶液を厚さ0.7mmのガラス基材にスピンコート法を用いて塗布し、100℃で10分乾燥した後、200℃で60分焼成することにより塗膜を得た。得られた塗膜をラビング処理した。ラビング処理は、市販のラビング装置を用いて行った。
ラビングした基材3に本発明の立体画像表示用複屈折レンズ材料(15)を70℃に温めた状態のままスピンコート法で塗布した。得られた塗布膜の上に配向処理が施された樹脂金型1をラビングした基材の配向方向と樹脂金型1の配向方向が並行になるように配置した後、室温まで冷却した。次に樹脂金型1をゆっくり取り外し、紫外線硬化型のエポキシアクリレート樹脂をスピンコート法で塗布した。その後、高圧水銀ランプを用いて、40mW/cm2の強度で25秒間紫外線光を照射した。このようにして図2に示される立体画像表示用複屈折レンズを得た。得られた本発明の立体画像表示用複屈折レンズは、欠陥がなく配向性も良好であった。
配向膜用ポリイミド溶液を厚さ0.7mmのガラス基材にスピンコート法を用いて塗布し、100℃で10分乾燥した後、200℃で60分焼成することにより塗膜を得た。得られた塗膜をラビング処理した。ラビング処理は、市販のラビング装置を用いて行った。
2:複屈折レンズ
3:基材
Claims (18)
- 少なくとも1つ以上の重合性官能基を有する液晶化合物を2種類以上含有することを特徴とする立体画像表示用複屈折レンズ材料。
- 少なくとも2つ以上の重合性官能基を有する液晶化合物を2種類以上含有する請求項1記載の立体画像表示用複屈折レンズ材料。
- 固体相から液晶相への転移温度が、-10℃以下であり、かつ、液晶相から液体相への転移温度が50℃以上であることを特徴とする請求項1~2記載の立体画像表示用複屈折レンズ材料。
- 室温で重合できる請求項1から3の何れか一項に記載の立体表示用複屈折レンズ材料。
- 重合性官能基を有する液晶化合物が一般式(1)
- 一般式(1)において、2種類以上含有する液晶化合物のMGが同一である請求項1~5の何れか一項に記載の立体画像表示用複屈折レンズ材料。
- 一般式(1)において、MGが同一である液晶化合物の群を2組以上含有する請求項1~6の何れか一項に記載の立体表示用複屈折レンズ材料。
- 一般式(1)において、
Spが単結合、あるいはアルキレン基を表し(該アルキレン基は1つ以上のハロゲン原子又はCNにより置換されていても良く、この基中に存在する1つのCH2基又は隣接していない2つ以上のCH2基はそれぞれ相互に独立して、酸素原子が相互に直接結合しない形で、-O-、-S-、-NH-、-N(CH3)-、-CO-、-COO-、-OCO-、-OCOO-、-SCO-、-COS-、-CONH-、-NHCO-、-CH=CH-又は-C≡C-により置き換えられていても良い。)、MGが一般式(1-b)
- 一般式(1)において、Pが一般式(P-1)から(P-18)
- 一般式(2a)及び(2b)
- 一般式(3)及び(4)
- 請求項1から11の何れか一項に記載の立体画像表示用複屈折レンズ材料の硬化により形成されたことを特徴とする立体画像表示用複屈折レンズ。
- 請求項1から11の何れか一項に記載の立体画像表示用複屈折レンズ材料を、一軸方向に配向処理された配向膜上に塗布し、紫外線で硬化させてレンズ状に成形することを特徴とする立体画像表示用複屈折レンズの製造方法。
- 紫外線で硬化させてレンズ状に成形する工程が、立体画像表示用複屈折レンズ材料の塗布膜をパターン化されたマスクを介して紫外線で硬化させる工程である請求項13記載の立体画像表示用複屈折レンズの製造方法。
- 紫外線で硬化させてレンズ状に成形する工程が、立体画像表示用複屈折レンズ材料の塗布膜を樹脂金型で覆った後に紫外線で硬化させる工程である請求項13記載の立体画像表示用複屈折レンズの製造方法。
- 紫外線で硬化させてレンズ状に成形する工程が、立体画像表示用複屈折レンズ材料の塗布膜を樹脂金型で覆った後に樹脂金型を取り外し、次いで少なくとも重合性官能基を有する樹脂を前記塗布膜の上に積層し、紫外線で硬化させる工程である請求項13記載立体画像表示用複屈折レンズの製造方法。
- 請求項1から11の何れか一項に記載の立体画像表示用複屈折レンズ材料、光重合性開始剤、重合禁止剤、及び、必要に応じて安定剤、からなる重合性液晶組成物。
- 請求項1から11の何れか一項に記載の立体画像表示用複屈折レンズ材料、光重合性開始剤、重合禁止剤、ホモジニアス配向を促進する界面活性剤、または高分子、必要に応じて安定剤、必要に応じて溶剤、からなる重合性液晶組成物。
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CN103282800A (zh) | 2013-09-04 |
EP2660631B1 (en) | 2018-12-05 |
KR101952697B1 (ko) | 2019-02-28 |
US9599829B2 (en) | 2017-03-21 |
EP2660631A1 (en) | 2013-11-06 |
KR20130129984A (ko) | 2013-11-29 |
TW201235453A (en) | 2012-09-01 |
EP2660631A4 (en) | 2016-08-31 |
TWI500744B (zh) | 2015-09-21 |
US20130309411A1 (en) | 2013-11-21 |
US20150030973A1 (en) | 2015-01-29 |
JP5553184B2 (ja) | 2014-07-16 |
CN103282800B (zh) | 2018-01-23 |
JPWO2012090785A1 (ja) | 2014-06-05 |
US9927625B2 (en) | 2018-03-27 |
JP5929960B2 (ja) | 2016-06-08 |
JP2014197205A (ja) | 2014-10-16 |
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