CN100378512C - Mfg method of optical stacker and LCD device - Google Patents
Mfg method of optical stacker and LCD device Download PDFInfo
- Publication number
- CN100378512C CN100378512C CNB2004100390776A CN200410039077A CN100378512C CN 100378512 C CN100378512 C CN 100378512C CN B2004100390776 A CNB2004100390776 A CN B2004100390776A CN 200410039077 A CN200410039077 A CN 200410039077A CN 100378512 C CN100378512 C CN 100378512C
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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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
- G02F1/133528—Polarisers
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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
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
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- Organic Chemistry (AREA)
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Abstract
Provided is a manufacturing method for layering an optical element consisting of a liquid crystal substance layer having no supporting substrate film. The optical layered body is manufactured in the following processes: a first process of adhering a liquid crystal substance layer having the alignment of the liquid crystal fixed and being formed on an alignment substrate to a removable substrate via an adhesive layer, and then peeling the alignment substrate off to transfer the liquid crystal substance layer onto the removable substrate to obtain a layered body (A) consisting of the removable substrate/adhesive layer/liquid crystal substance layer; a second process of laminating a polymer stretched film and a polarizing plate via a self-adhesive (adhesive) to obtain a layered body (B) consisting of the polarizing plate/self-adhesive (adhesive) layer/polymer stretched film; and a third process of peeling the removable substrate of the layered body (A) off before or after laminating the layered bodies (A) and (B).
Description
Technical field
The present invention relates to be used for the manufacture method of the optical laminate of various optical elements.In addition, the invention still further relates to the ellipsoidal polarizing plate or the circular polarizing disk of the optical laminate formation that obtains by described manufacture method, also relate to the liquid crystal indicator that possesses this ellipsoidal polarizing plate or circular polarizing disk.
Background technology
The film that the liquid-crystal compounds oriented layer constitutes, especially nematic structure, twisted nematic structure or the film that constitutes to the fixing liquid crystal material of row mixed structure, the element of using as the look or the viewing angle compensation of used for liquid crystal display element or during as optical activity optical element etc., have excellent performance, help various display element high performances and lighting.As the manufacture method of these films, proposed the layer that constitutes by liquid crystal material that forms on the orientation substrate, the method (for example the spy opens flat 4-57017 communique, the spy opens flat 4-177216 communique) of transcription to the light-transmitting substrate of double as supporting substrate.In addition, solution as the endurancing that stands the desired harshness of liquid crystal display cells, perhaps for further slimming, lighting, also proposed not use the manufacture method (for example, the spy opens flat 8-278491 communique) of the optical element that constitutes by liquid crystal material of supporting substrate film.By described method,, to the releasable substrate, peel off this releasable substrate by the cement transcription then, thereby can make the optical element that constitutes by the liquid crystal material layer that does not have supporting substrate the liquid crystal material layer of the orientation that forms on the orientation substrate.
On the other hand, in recent years, for optical thin film, require it to have higher optical property to use in the various display device headed by the liquid crystal indicator, only use 1 layer of optical thin film can not meet the demands, thereby more be stacked use optical thin film.Broadband circular polarizing disk that the colorimetric compensation that for example can enumerate the stn liquid crystal display device obtains with 1/4 wavelength plate in the circular polarizing disk and the stacked broadband that obtains 1/4 wavelength plate of 1/2 wavelength plate or stacked cholesteric film with different choice wavelength coverage with stacked, the transflective liquid crystal display device that in the phase-contrast film with the polycarbonate is the macromolecule oriented film of representative etc.Herein, the folded broadband 1/4 wave resistance plate that obtains of 1/4 wave resistance plate and 1/2 wave resistance flaggy carries out stackedly with for example patent the 3236304th communique disclosed method, be assembled into liquid crystal indicator and use as circular polarizing disk.Such optical thin film layer poststack is except that obtaining high-performance, and mobile phones of popularizing in a large number or personal digital assistant device etc. are also very high to the requirement of slimming, lighting in recent years.The thing followed is for the optical thin film that uses in the display device also urgent its slimming of expectation, lighting.Therefore, carry out making thinner trials such as macromolecule oriented film, but because the restriction of optical characteristics and manufacturing process, can only the macromolecule oriented film have been made thinlyyer limitedly, during therefore stacked use, had the thicker problem of thickness.
Solving aspect such problem, though think that using above-mentioned spy to open the such optical element that is made of liquid crystal material that does not have the supporting substrate film of flat 8-278491 communique is effectively,, the industrially preparing process of stacked this optical element is established as yet.
Summary of the invention
Only the objective of the invention is to realize simultaneously the optical characteristics high performance that is difficult to realize by the macromolecule stretched film and the thinning significantly of film.Promptly, be conceived to the optical thin film that constitutes by the liquid crystal material that under thinner state, can realize excellent optical property, to the manufacture method of the stacked optical element that constitutes by the liquid crystal material layer that does not have the support substrate film, carried out conscientious research, so that finished the present invention.
Promptly, the 1st aspect of the present invention relates to the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: the liquid crystal material layer that (1) is fixed the liquid crystal aligning that forms on the orientation substrate, be bonded on the releasable substrate by the cement layer, peel off orientation substrate then, with the liquid crystal material transcription on the releasable substrate, obtain the 1st operation by the duplexer (A) that the releasable substrate/the cement layer/the liquid crystal material layer constitutes, (2) macromolecule stretched film and Polarizer are bonded together by bonding agent or cement, obtain the 2nd operation by Polarizer/bonding agent or the duplexer (B) that the cement layer/the macromolecule stretched film constitutes, and (3) described duplexer (A) and (B) bonding before or bonding after, peel off the 3rd operation of the releasable substrate of duplexer (A).
The 2nd aspect of the present invention relates to the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: the liquid crystal material layer that (1) is fixed the liquid crystal aligning that forms on the orientation substrate, be bonded on the releasable substrate 1 by the cement layer, peel off orientation substrate then, with the liquid crystal material transcription on releasable substrate 1, then, by cement layer 2, releasable substrate 2 and liquid crystal material layer are bonded together, peel off releasable substrate 1 afterwards, obtain the 1st operation of cement layer 1/ liquid crystal material layer/the duplexer (A) that cement layer 2/ releasable substrate 2 constitute of transcription to the releasable substrate 2, (2) macromolecule stretched film and Polarizer are bonded together by bonding agent or cement, obtain the 2nd operation by Polarizer/bonding agent or the duplexer (B) that the cement layer/the macromolecule stretched film constitutes, and (3) described duplexer (A) and (B) bonding before or bonding after, peel off the 3rd operation of the releasable substrate 2 of duplexer (A).
The 3rd aspect of the present invention relates to the manufacture method of aforesaid optical laminate, wherein said liquid crystal material layer, and the liquid crystal material layer that is fixed to the row orientation that is formed under mesomorphic state by the liquid crystal material that shows as positive uniaxiality on the optics constitutes.
The 4th aspect of the present invention relates to the ellipsoidal polarizing plate that optical laminate that aforesaid manufacture method obtains constitutes.
The present invention the 5th aspect relates to the circular polarizing disk that optical laminate that aforesaid manufacture method obtains constitutes.
The present invention the 6th aspect relates to the liquid crystal indicator that possesses aforesaid ellipsoidal polarizing plate or circular polarizing disk at least.
In addition, above-mentioned "/" represents the interface of each layer, below equally the expression.
Embodiment
Below the present invention is described in detail.
The liquid crystal material layer that the orientation of the used liquid crystal of the present invention is fixed is the liquid crystal material layer that is fixed by the method that adopts the liquid crystal material that fixedly is in state of orientation.As fixing method, can enumerate after being fixed as the method for glassy state under the situation of high molecule liquid crystal material by the state of orientation quenching and will having the low molecule or high molecule liquid crystal material orientation of reactive functional groups, make method that described functional group reactions (solidify or crosslinked etc.) fixes etc.
As reactive functional groups, can enumerate vinyl, (methyl) acryloyl group, ethyleneoxy, epoxy radicals, hydroxyethyl, carboxyl, hydroxyl, amino, isocyanate group, acid anhydrides etc., react with being suitable for each group method.
Can be as the liquid crystal material of liquid crystal material layer, application purpose or manufacture method according to liquid crystal film can be selected from the broad range of low molecular weight liquid crystal material, high molecule liquid crystal material, but preferred high molecule liquid crystal material, and the molecular shape of liquid crystal material can be bar-shaped or discoid.For example also can use the disk liquid-crystal compounds of expression disk nematic liquid crystal.
As the liquid crystal phase of liquid crystal material layer before fixing, can enumerate nematic phase, twisted nematic phase, cholesterol phase, compound nematic phase, compound twisted nematic phase, disk nematic phase, smectic phase etc.
As described high molecule liquid crystal material, can be with the potpourri of various straight chain polymer liquid crystal materials, branched polymer liquid crystal material or these materials.As the straight chain polymer liquid crystal material, can enumerate potpourri of macromolecule liquid crystal materials such as polyesters, polyamide-based, polycarbonate-based, polyimide, polyurethanes, polybenzimidazoles class, polybenzoxazole class, polybenzothiozole class, poly-azomethine class, polyesteramide class, polyestercarbonate class, polyester-imide class or these materials etc.In addition, as the branched polymer liquid crystal material, can enumerate and on material, connect as the high molecule liquid crystal material of the rod shaped liquid crystal base of side chain or the potpourri of these materials with straight chain type such as polyacrylate, polymethacrylate, polyethylene kind, polysiloxane-based, polyethers, poly-malonic acid class, polyesters or cyclic skeleton structure.Wherein, consider the polyesters of preferred straight chain polymer liquid crystal material from the aspects such as complexity of synthetic or orientation.
As the low molecular weight liquid crystal material, the end that can enumerate saturated benzene carboxylic acid, unsaturated benzene carboxylic acid, biphenyl carboxylic acids class, aromatic hydroxy-carboxylic class, azomethine class, bisdiazo methine compounds, azo-compound, azoxy compounds, cyclohexane ester type compound, phytosterin compound etc. is introduced and is added composition that cross-linked compound forms etc. in the liquid crystal compounds of described reactive functional groups or the compound with liquid crystal liquid crystal property in described these compounds.In addition, can enumerate benzophenanthrene class, three polyindene classes etc. as the disk liquid-crystal compounds.
In not hindering the scope that manifests liquid crystal liquid crystal property, can carry out the reactive functional groups of cross-linking reaction etc. or all cpds combination at position with having in the liquid crystal material by heat or light.As the functional group that cross-linking reaction can take place, can enumerate described various reactive functional etc.
The formation method of the liquid crystal material layer that liquid crystal aligning is fixed is, by the following method described liquid crystal material or the composition that contains as required all cpds that adds are coated on the orientation substrate or the solution of said composition with molten condition and are coated on the orientation substrate, then, with film drying, the thermal treatment (orientation of liquid crystal) that is coated on the orientation substrate, and use rayed and/or heat treated (polymerization, crosslinked) etc. to fix the method for described orientation as required.
About preparing the solvent that uses in the described solution, as long as it is to dissolve liquid crystal material and the composition that uses among the present invention, and the solvent that can remove then is not particularly limited it under proper condition, the preferred usually ketones such as acetone, methyl ethyl ketone, isophorone that use; Butyl cellosolve, own ethoxy-ethanol, methoxy-ether alcohol classes such as 2-propyl alcohol; Gylcol ether such as glycol dimethyl ether, diethylene glycol dimethyl ether; Ester classes such as ethyl acetate, acetic acid methoxy propyl ester, ethyl lactate; Phenols such as phenol, chlorophenol; N, amide-types such as dinethylformamide, N,N-dimethylacetamide, N-Methyl pyrrolidone; Halogenated hydrocarbon or its various potpourris such as chloroform, tetrachloroethane, dichloro-benzenes.In addition, in order on orientation substrate, to form uniform film, can in solution, add surfactant, defoamer, levelling agent etc.And in not hindering the scope that manifests liquid crystal liquid crystal property, can add with dyeing is the dichromatic dye of purpose, conventional dyestuff or pigment etc.
For coating process, so long as can guarantee the inhomogeneity method of filming, then have no particular limits, can adopt known method.For example can enumerate spin-coating method, mould is coated with method, dip coating, curtain and is coated with method, spraying process etc.After the coating, can also add by heating or remove the operation of desolvate (drying) with methods such as warm winds.The thickness of coating caudacoria drying regime is 0.1 μ m～50 μ m, is preferably 0.2 μ m～20 μ m, more preferably 0.3 μ m～10 μ m.Outside this scope, can cause the orientation of the optical property deficiency of the liquid crystal material layer that obtains or liquid crystal material insufficient etc., so not preferred.
Then, if desired can be by the orientation of formation liquid crystal such as thermal treatment, what be orientated afterwards is fixing.Thermal treatment is meant and is heated to the temperature range that manifests liquid crystal phase, and self alignment capability of utilizing that liquid crystal material itself has makes liquid crystal aligning.As heat treated condition, according to the liquid crystal phase behavior temperature (transition temperature) of the liquid crystal material that uses, top condition is different with boundary value, thus cannot treat different things as the same, but be generally 10～300 ℃, be preferably 30～250 ℃.Under very low temperature, the problem that exists liquid crystal aligning fully not carry out at high temperature, exists liquid crystal material to decompose orientation substrate is produced dysgenic problem.In addition, about heat treatment time, be generally 3 seconds～60 minutes, be preferably 10 seconds～30 minutes.Heat treatment time than 3 seconds after a little while, have the incomplete problem of orientation of liquid crystal, and heat treatment time is when surpassing 60 minutes, productivity extremely worsens, so these two kinds of conditions are not preferred.After liquid crystal material is finished orientation by thermal treatment etc., adopt the method that is fit to the liquid crystal material that uses, the liquid crystal material layer on fixed orientation substrate under this state.
As described orientation substrate, the film of the polyimide of can giving an example, polyamide, polyamide-imides, polyphenylene sulfide, polyphenylene oxides, polyetherketone, polyetheretherketone, polyethersulfone, polysulfones, poly-terephthalic acids second diester, poly-naphthoic acid second diester, polyarylate, triacetyl cellulose, epoxy resin, phenolics etc.
Difference according to manufacture method, even these films do not make the processing of alignment capability improvement, liquid crystal material for the present invention's use, also can show sufficient alignment capability, but alignment capability is insufficient or when not having alignment capability etc., can use by following processing and make its film, for example these films suitably be added hot-stretch with alignment capability; Along same direction friction, carry out so-called friction treatment with Artificial Fibers cloth etc.; The alignment films that known alignment agent such as polyimide, polyvinyl alcohol (PVA), silane coupling agent forms is set on the film, carries out friction treatment then; The rhombus vapor deposition treatment of silicon dioxide etc.; Perhaps carry out the appropriate combination of these methods etc.
In addition, as orientation substrate, can use the surface to be provided with the sheet metal such as aluminium, iron, copper of the minute groove of a plurality of rules or various glass plates etc.
Here the orientation process direction to the orientation substrate film has no particular limits, according to carry out in direction arbitrarily above-mentioned each handle, can select suitable orientation, when particularly handling the liquid crystal film that forms on the long orientation substrate, preferably with respect to the MD direction of long continuous film, with predetermined angular, as required, carry out orientation process along tilted direction.By direction orientation process along predetermined angular, can bring into play the axial arrangement of optimised optical properties, carry out stacked to liquid crystal film, when stacked, the state that can realize possessing the MD of long film is fitted (so-called axle is fitted to axle), perhaps makes it extremely valuable at the aspects such as yield rate that improve goods.
Then, the liquid crystal material layer that forms on the orientation substrate engages releasable substrate or releasable substrate 1 by cement layer or cement layer 1.
As this cement layer or cement layer 1, liquid crystal material and releasable substrate or releasable substrate 1 had sufficient engaging force, and can peel off the releasable substrate in subsequent handling,, it be had no particular limits as long as it does not damage the optical characteristics of liquid crystal material layer.In addition, the cement layer 2 when arriving aftermentioned releasable substrate 2 as transcription also can use identical cement.
As described cement, for example can enumerate crylic acid resin, methacrylic resin class, epoxy resin, ethylene-vinyl acetate copolymer class, rubber-like, polyurethanes, glymes and its various potpourris, the perhaps various reactive materials of thermohardening type and/or light-cured type, electron ray curing type etc.Contain the material that has both the transparency protected layer function of protecting liquid crystal material in these cements.In addition, also can be with bonding agent as described cement.And cement layer 1 and cement layer 2 can be identical or different, and this point is without any restriction.
The reaction of described reactive materials (curing) condition changes according to condition such as the composition, viscosity and the temperature of reaction that constitute cement, so the condition that can select to be fit to each factor is reacted.For example, the light-cured type reactive materials preferably adds various known light triggers, utilizes metal halide lamp, high-pressure sodium lamp, low pressure mercury lamp, xenon lamp, arc lamp, laser, radiates light sources such as light source synchronously, and irradiates light reacts.As the exposure of unit area (1 square centimeter), calculate with the accumulative total exposure, be generally 1～2000mJ, preferred 10～1000mJ.But when the absorption region of light trigger and the visibly different situation of wave spectrum of light source, perhaps reactive compounds from the situation that has receptivity in optical source wavelength etc. not in this scope.Under these situations, can adopt method of sneaking into suitable light sensitizer or sneaking into the light trigger that absorbing wavelength is different more than 2 kinds or 2 kinds etc.Under the situation of using electron ray curing type reactive materials, accelerating potential is generally 10kV～200kV, is preferably 50kV～100kV.
As mentioned above, the thickness of cement layer is different because of the intensity of the composition that constitutes cement, cement or serviceability temperature etc., but is generally 1～50 μ m, is preferably 2～30 μ m, more preferably 3～10 μ m.Outside this scope, there are the problems such as seepage of end in the undercapacity of cement, so be not preferred.
In addition, in the scope of not damaging the cement characteristic, can in these cements, add various particulates etc. or surface modifier, thus the fissility or the corrosivity of control optical characteristics or control basal plate.
As described particulate; can enumerate the refractive index particulate different, do not damage electrically conductive microparticle that the transparency is used for improving antistatic performance, be used for improving the particulate of abrasion performance etc., more specifically can enumerate silicon dioxide microparticle, alumina particulate, ITO (tin indium oxide) particulate, silver-colored particulate or various synthetic resin particulates etc. with the compound that constitutes cement.
As described surface modifier, the curable that requires the compatibility of itself and cement good, do not influence cement or solidify after optical property, other are not particularly limited, and water soluble surfactant active, oil soluble surfactant, high molecular surfactant, the fluorine that can use ion-type, nonionic is organic metal class surfactant, reactive surfactants etc. such as surfactant, silicone.Especially preferably using fluorine such as all-fluoroalkyl compound, per-fluoro polyether compound is organic metal class surfactants such as surfactant or silicone, because the effect that they improve the surface is big.Surface modifier addition preferably account for 0.01～10 weight % of cement, more preferably account for 0.05～5 weight %, further preferred 0.1～3 weight %.Addition than described scope after a little while, additive effect is insufficient, and too much the time, produces shortcomings such as bond strength excessive descent.In addition, surface modifier can use separately, also can share the kinds of surface modifying agent as required.
In the scope that does not influence effect of the present invention, can also add various adjuvants such as antioxidant, ultraviolet light absorber.
Releasable substrate as the present invention uses can use tygon, polypropylene, olefine kind resins such as 4-methylpentene-1 resin, polyamide, polyimide, polyamide-imides, polyetherimide, polyetherketone, polyetheretherketone, polyethersulfone, the polyketone thioether, polysulfones, polystyrene, polyphenylene sulfide, polyphenylene oxide, poly-terephthalic acids second diester, Polybutylene Terephthalate, polyarylate, polyacetal, the uniaxial tension polyester, polycarbonate, polyvinyl alcohol (PVA), polymethylmethacrylate, polyarylate, amorphous poly alkene, norbornene resin, the film of triacetyl cellulose or epoxy resin etc.
Particularly, can enumerate the various films of 4-methylpentene-1, polymethylmethacrylate, polystyrene, polycarbonate, polyethersulfone, polyarylate, amorphous poly alkene, norbornene resin, triacetyl cellulose or epoxy resin etc. as the optically isotropic film that on the inspectability of optical defect, has the excellent transparency.
In order to make these resin films have suitable fissility, can perhaps be pre-formed organic film or inorganic thin film in advance at its surface-coated silicone.In addition, for same purpose, also can carry out physical treatments such as chemical treatments such as basification or corona treatment on the resin film surface.
In addition, in order to adjust the fissility of releasable substrate, can contain lubricant or surface modifier in the described resin film.As described lubricant,, its kind, addition are had no particular limits as long as it does not produce harmful effect to the inspectability or the fissility of optical defect.As the object lesson of lubricant, can enumerate silicon dioxide microparticle, alumina particulate etc., as the index of addition, the turbidity value of releasable substrate is generally below 50% or 50%, below preferred 30% or 30%.When addition is very few, can not see additive effect, and addition for a long time, the optical defect inspectability reduces, so be not preferred.
In addition, as required, can also contain other known various adjuvants, for example anticaking agent, antioxidant, antistatic agent, thermal stabilizer, resistance to impact modifying agent etc.
About the stripping ability of releasable substrate, even the releasable substrate that same material is made also changes because of manufacture method, surface state or with the wetting state of the cement that uses etc., so cannot treat different things as the same.Be generally 0.38～12N/m with the stripping ability at the interface of cement (180 ° peel off, peeling rate is 30cm/ minute, room temperature measuring), be preferably 0.38～8.0N/m.Under the situation of stripping ability less than this value, liquid crystal material layer on the orientation substrate is when peeling off orientation substrate after the fissility substrate engages, occur attached on the fissility substrate owing to stripping ability is low, can not obtain having the state of well peeling off at required interface, cause the transcription of liquid crystal material course fissility substrate insufficient; And under the too high situation of stripping ability, the liquid crystal material layer is destroyed or can not be with the interface peel of required layer etc., so be not preferred when peeling off the fissility substrate.
In addition, the thickness that the fissility substrate is also arranged is to the influential situation of fissility, so the thickness of preferred fissility substrate is 16～100 μ m, and preferred especially 25～50 μ m.When thickness is blocked up, pick-up point instability, the problem that exists fissility to worsen; And cross when thin, can not keep the physical strength of film, produce problem such as tear to shreds in making so exist.
As the macromolecule stretched film that the present invention uses, can enumerate the single shaft or the biaxial stretch-formed phase difference film that form by cellulose family, polycarbonate-based, polyarylate class, polysulfones, polyvinyl alcohol (PVA) (PVA) class, polyacrylic, polyether sulfone, cyclic olefin etc.Wherein consider the uniaxial tension of cyclic olefins such as optimization polycarbonate class norborene class from the easy degree of making, the homogeneity or the optical characteristics aspect of film.
Here draw direction is had no particular limits,, can suitably select by the operation of going up in any direction.When particularly handling long macromolecule stretched film, the MD direction of preferred continuous film that relatively should be long with predetermined angular, as required, is handled along tilted direction (oblique extension) or TD direction (cross directional stretch).By direction stretch processing along predetermined angular, liquid crystal film is carried out when stacked with the axle configuration that can bring into play optimised optical properties, fit at the state with the MD that has long film (so-called axle is fitted to axle), the aspects such as yield rate that perhaps improve goods are extremely valuable.
Polaroid for the present invention uses as long as it is the polaroid that can arrive the object of the invention, has no particular limits it, can suitably use polaroid commonly used in the liquid crystal indicator, the film-type polaroid of the preferred listing of exploitation in recent years.Specifically can use polarization film that absorption iodine in the hydrophilic macromolecule film that the part alkali compound etc. of PVA class polarization films such as polyvinyl alcohol (PVA) (PVA) or part acetalation PVA, ethylene-vinyl acetate copolymer forms and/or the polarization film of double-colored pigment after stretching, the processed thing of PVA or the polyene oriented films such as desalination acid treatment thing of polyvinyl chloride etc. form etc.In addition, also can use the reflective polarizing film.
Can use polarization film separately in the described polaroid, also can be used for improving the protective clear layer of intensity, moisture-proof, thermotolerance etc. in the one or both sides setting of polarization film.As protective clear layer, can enumerate directly or pass through light-cured type resin beds such as the protective clear layer of transparent resin films such as folded layer by layer polyester of cement or triacetyl cellulose, coat, acrylic compounds or the epoxies of resin etc.When these protective clear layers were covered the two sides of polarization film, the two sides can be provided with identical protective clear layer, also different protective clear layers can be set.
Manufacture method to optical laminate of the present invention is elaborated below.
Manufacture method as the liquid crystal material layer does not have specific limited, for example can be in order to method 1 and method 2 are made down.
Method 1
On orientation substrate, form liquid crystal material with suitable method and film, remove as required and desolvate etc., wait the orientation of finishing liquid crystal, the orientation of the method immobile liquid eutectic substance layer by being fit to used liquid crystal material by heating.Then, on the fixing liquid crystal material layer of orientation, form the cement layer, with liquid crystal material layer and releasable substrate fluid-tight engagement, afterwards, peel off orientation substrate after making cement layer reaction (curing) as required by the cement layer.
Like this, just can make the fixing liquid crystal material layer transcription of orientation to the releasable substrate.Thereby obtain being bonded on liquid crystal material layer on the releasable substrate by the cement layer.
In order to protect the surface of the liquid crystal material layer that obtains, can on exposed liquid crystal material layer, protective clear layer be set, also can the adhesive surface protective film.Liquid crystal protective seam herein can be selected from described cement.
That is to say, as the layer structure of the present invention that is formed at the liquid crystal material layer (duplexer (A)) on the fissility substrate by the cement layer, can enumerate 1. releasable substrate/cement layer 1/ liquid crystal material layer, 2. releasable substrate/cement layer 1/ liquid crystal material layer/cement layer 2."/" represents the interface of each layer in the superincumbent description, and following statement is identical.
Method 2
On orientation substrate, form liquid crystal material with suitable method and film, remove as required and desolvate etc., wait the orientation of finishing liquid crystal, the orientation of the method immobile liquid eutectic substance layer by being fit to used liquid crystal material by heating.Then, on the fixing liquid crystal material layer of orientation, form cement layer 1, with liquid crystal material layer and releasable substrate 1 fluid-tight engagement, afterwards, peel off orientation substrate after making 1 reaction (curing) of cement layer as required by cement layer 1.Secondly, by cement layer 2 releasable substrate 2 and liquid crystal material layer are engaged, peel off releasable substrate 1, thereby can obtain the duplexer (A) that cement layer 1/ liquid crystal material layer/cement layer 2/ releasable substrate 2 constitute of transcription to the releasable substrate 2.
Can on the duplexer that obtains (A), protective clear layer be set, also can the adhesive surface protective film.
Laminating method to optical laminate of the present invention describes below.
The 1st operation is for making described duplexer (A).
Secondly, in the 2nd operation,, obtain the duplexer (B) that Polarizer/bonding agent or cement layer/macromolecule oriented film constitutes by bonding agent or the bonding macromolecule oriented film of cement layer.
Then, in the 3rd operation,, peel off residual releasable substrate or releasable substrate 2, thereby obtain optical laminate of the present invention by bonding agent or bonding duplexer of cement layer (B) and duplexer (A).Herein, bonding can the carrying out behind the releasable strippable substrate of duplexer (A) between this duplexer also can peel off residual releasable substrate from duplexer (A) again behind bonding duplexer.
Through these operations at least, can obtain the optical laminate of the present invention of following composition.
1. Polarizer/bonding agent or cement layer/macromolecule oriented film/bonding agent or cement layer/liquid crystal material layer/cement layer
2. Polarizer/bonding agent or cement layer/macromolecule oriented film/bonding agent or cement layer/cement layer/liquid crystal material layer
3. Polarizer/bonding agent or cement layer/macromolecule oriented film/bonding agent or cement layer/cement layer/liquid crystal material layer/cement layer
4. Polarizer/bonding agent or cement layer/macromolecule oriented film/bonding agent or cement layer/cement layer/liquid crystal material layer/cement layer
In addition, among the present invention, liquid crystal material layer on the orientation substrate that can also orientation is fixing or the transcription liquid crystal material layer to the releasable substrate, carry out repeatedly by bonding agent or cement layer stacked, can stacked multilayer liquid crystal material layer.
In addition, in manufacturing process of the present invention, under the state of still residual orientation substrate of the one side of liquid crystal material layer or releasable substrate, the bonding agent of subsidiary detachment film is bonded in this orientation substrate back side or this releasable substrate back, by peeling off this orientation substrate or releasable substrate, can make the detachment film of bonding agent become new releasable supporting substrate.If adopt this method, this bonding agent not only can or be used for the bonding agent of stacked liquid crystal cell or other optical element as the bonding agent of stacked optical laminate of the present invention, and arbitrary overturn adhesive surface etc. up and down simultaneously makes that to make degree of freedom bigger.
Among the present invention, on its plate face, be pre-formed the abscission layer that to peel off from this substrate, therefore between liquid crystal material layer and other layer, also can form abscission layer because the releasable substrate that uses has.Because the formation of abscission layer, thereby the stress of the appearance change of the liquid crystal material layer of film can obtain to suppress to make the time or during environmental test (for example, fluctuation etc.) is by effect.Abscission layer is not had special qualification herein, be preferably optically isotropic hyaline layer, for example can enumerate the potpourri of polymkeric substance such as acrylic compounds, methacrylic, nitrocellulose class, epoxy compound class and these materials.Described abscission layer is that thickness is 0.3 μ m～40 μ m, is preferably 0.5 μ m～10 μ m, vitrifacation inversion point (Tg) is more than 20 ℃ or 20 ℃, preferably at the optically isotropic hyaline layer more than 50 ℃ or 50 ℃, as long as the optical characteristics of not obvious damage liquid crystal material layer, its material is not particularly limited.If the thickness of abscission layer and vitrifacation inversion point beyond described scope, then poor effect, can not reach one of the object of the invention-film thinning, so be not preferred.
In the described abscission layer can by interpolation be cross-linked into the distribution first portion crosslinked, by adding plasticizer, add lubricant etc., the control physical property.
Formation method for abscission layer does not have special restriction yet; for example can be on the fissility substrate film of tygon, polypropylene, polyethylene terephthalate etc.; adopt methods such as coating, extrusion to be pre-formed the material of abscission layer with described thickness; closely bond this layer by bonding agent or cement layer or protective clear layer then, peel off the releasable substrate film again.
Optical laminate of the present invention can also comprise 1 layer or multilayer anti-reflection layer, non-glare treated layer, hard layer, light diffusion layer except that Polarizer and liquid crystal material layer.Bonding with Polarizer or engage used cement etc. so long as optical grade other get final product, do not have special qualification, for example can use described suitable cement.
The gross thickness of the optical laminate of as above making of the present invention is 450 μ m or below the 450 μ m, is preferably 350 μ m or below the 350 μ m, more preferably 300 μ m or below the 300 μ m.If beyond described scope, because of not reaching one of the object of the invention-film thinning, so be not preferred.
Optical laminate of the present invention can be brought into play compensating element,, the elliptical polarization plate of various liquid crystal indicators, the effect of rotatory polarization plate according to the optical parametric of liquid crystal material layer.
That is to say, constitute the liquid crystal material layer of optical laminate, the effect that for example has phase difference plate to row orientations, the fixing liquid crystal material layer of twisted nematic orientation is used so can be used as the compensating plate of transmission such as STN type, TN type, OCB type, HAN type or reflection-type liquid-crystal display device as the optical laminate of the present invention of structure member with this liquid crystal material layer.
In addition, the delay of fixing liquid crystal material layer utilization to the row hybrid orientation when the front is seen, can be used as phase difference film or wave resistance plate uses, in addition, owing to produce asymmetry at retarding direction (molecular axis direction of film thickness direction), improve parts so can be used for the visual angle of TN type liquid crystal indicator.
In addition, for liquid crystal material layer with 1/4 wave resistance plate function, as the present invention, and the combination polaroid, what can be used as circular polarizing disk, reflection-type liquid-crystal display device or EL display device prevents use such as reflective film.Particularly aspect the wide wavestrip 1/4 wave resistance plate that plays a role in the wide wavestrip that obtains crossing over the visible light scope, it has been generally acknowledged that differing state that 1/2 wave resistance plate that birefringent light under the monochromatic light of 1/4 wave resistance plate of nearly 1/4 wavelength and 550nm differs nearly 1/2 wavelength intersects with their slow axis the birefringent light under the monochromatic light of 550nm stacked is effectively, and be widely used in the reflection-type liquid-crystal display device in fact.That is to say, adopt the technology that obtains ultrathin optical laminate, can obtain the ultrathin broadband 1/4 wave resistance plate that in the past only was difficult to obtain with the macromolecule extension film resemble the present invention.At this, the length of delay of 1/4 wave resistance plate is generally 70nm～180nm, is preferably 90nm～160nm, preferred especially 120nm～150nm.In addition, the length of delay of 1/2 wave resistance plate is generally 180nm～320nm, is preferably 200nm～300nm, preferred especially 220nm～280nm.There is the unnecessary painted problem of generation in the liquid-crystal apparatus in the delay scope of 1/4 wave resistance plate and 1/2 wave resistance plate beyond the described scope time.In addition, length of delay is represented with birefringence n and thickness d.
In addition, in the optical laminate of the present invention, the liquid crystal material layer that constitutes this duplexer is so long as the fixing material of cholesterol orientation or dish-like orientation, just can be used to improve briliancy with reflection of polarization film, reflection-type coloured film, originate from the local reflex energy produce the various Security elements of reflected light change color or decorating film etc. because of visual angle change.
(embodiment)
Below, be example to make circular polarizing disk, illustrate in greater detail the present invention by embodiment and comparative example, but the present invention is not limited to this.In addition, do not have the specified otherwise part in the present embodiment, length of delay (birefringence n and thickness d are long-pending) is the value at wavelength 550nm.
(preparation example)
With 2 of the terephthalic acids of 50mmol, 50mmol, the methyl chinol diacetate of 6-naphthalene dicarboxylic acids, 40mmol, the sterol diacetate of 60mmol and the N-methylimidazole of 60mg, in nitrogen atmosphere, in 270 ℃, polycondensation 12 hours.Then, the resultant of reaction that obtains is dissolved in tetrachloroethane after, precipitate again with methyl alcohol and to make with extra care, obtain the 14.6g liquid crystalline polyester.The logarithm viscosity of this liquid crystalline polyester (polymkeric substance-1) (phenol/tetrachloroethane (6/4 weight ratio) mixed solvent: 30 ℃) is 0.16dl/g, its liquid crystal phase has nematic phase, isotropic phase-liquid crystal phase inversion temperature is more than 250 ℃ or 250 ℃, and the glass transition temperature that Differential Scanning Calorimeter (DSC) records is 112 ℃.
The N-N-methyl-2-2-pyrrolidone N-that makes the polymkeric substance-1 of 20g be dissolved in 80g is made solution.With spinner this solution is coated on the Kapton (trade name " kapton " (カ プ ト Application) E.I.Du Pont Company) after the Artificial Fibers cloth friction treatment, dry remove desolvate after, 210 ℃ of thermal treatments 20 minutes, form to the row orientation texture.After the thermal treatment, cool to room temperature will be fixed to the row orientation texture, obtain that actual thickness is the uniform liquid crystal material layer of orientation of 1.4 μ m on the Kapton.Actual thickness is measured with the contact pin type film thickness gauge.
(embodiment 1)
On the liquid crystal material layer that preparation example obtains (Kapton is back to the face face), coating thickness is the commercially available UV curing type cement (UV-3400 of 5 μ m, East Asia synthetic (strain) system) as cement layer 1, stacked thickness is polyethylene terephthalate (PET) film 1 (S10 of the releasable substrate of 25 μ m on it, the Toray corporate system), by the UV that shines about 600mJ this cement layer 1 is solidified.Then, the duplexer that forms one from PET film 1/ cement layer 1/ liquid crystal material layer/Kapton is peeled off Kapton, thereby the transcription of liquid crystal material layer to the PET film 1 as the releasable substrate, obtained PET film 1/ and engage the duplexer (A) that basic unit's 1/ liquid crystal material layer constitutes.Herein, peel off PET film 1 after, the Δ nd of duplexer (A) is 140nm.
Then, be the one side that the adhesive phase of 25 μ m is bonded in commercially available uniaxial tension polycarbonate film (thickness is 60 μ m, and Δ nd is 270nm) with on the PET film that polysiloxane is handled, forming thickness in advance.Then, in this film one side of adhesion agent not, bondingly forming the Polarizer that thickness is the adhesive phase of 25 μ m (the about 180 μ m of thickness in one side in advance, Sumitomo Chemical (strain) system SQW-862), obtain the duplexer (B) of the PET film formation of Polarizer/adhesive phase/polycarbonate film/adhesive phase/polysiloxane processing.
Peel off the PET that polysiloxane is handled from this duplexer, bonding with the face of the liquid crystal material layer of duplexer (A), obtain the duplexer of Polarizer/adhesive phase/polycarbonate film/adhesive phase/liquid crystal material layer/cement layer 1/PET film 1.Peel off PET film 1 from this duplexer, obtain rotatory polarization plate of the present invention.The gross thickness of this rotatory polarization plate is 297 μ m.
(embodiment 2)
About the liquid crystal cell of commercially available Transflective TFT liquid crystal indicator, with the rotatory polarization plate that bonding agent adhesive embodiments 1 obtains, estimate display characteristic, its result, any one rotatory polarization plate all presents good demonstration on reflective-mode and transmission mode.In addition, this display device is carried out following two kinds of endurancings, 1. under 60 ℃, 90%RH, carried out 500 hours, 2. carried out 500 hours at 80 ℃, drying regime, its result think any all do not come off and outward appearance such as crackle unusual.
(embodiment 3)
On the liquid crystal material layer that preparation example obtains (back side of Kapton), coating thickness is the commercially available UV curing type cement (UV-3400 of 5 μ m, East Asia synthetic (strain) system) as cement layer 1, on cement, stacked thickness is polyethylene terephthalate (PET) film 1 (S10 of the releasable substrate of 25 μ m, the Toray corporate system), by the UV that shines about 600mJ this cement layer 1 is solidified.Thereafter, the duplexer that forms one from PET film 1/ cement layer 1/ liquid crystal material layer/Kapton is peeled off Kapton, thus with the transcription of liquid crystal material layer to PET film 1 as the releasable substrate.Secondly, on the liquid crystal material layer, coating thickness be the commercially available UV curing type cement (UV-3400) of 5 μ m as cement layer 2, stacked thickness is the PET film 2 (S10) as the releasable substrate of 25 μ m on cement layer 2, by the UV that shines about 600mJ this cement layer 2 is solidified.Then, peel off PET film 1, obtain the duplexer (A) that cement layer 1/ liquid crystal material layer/cement layer 2/PET film 2 constitutes.Herein, peel off PET film 2 after, the Δ nd of duplexer (A) is 140nm.
Then, be the one side that the adhesive phase of 25 μ m is bonded in commercially available uniaxial tension polycarbonate film (thickness is 60 μ m, and Δ nd is 270nm) with on the PET film that polysiloxane is handled, forming thickness in advance.Then, in this film one side of adhesion agent not, bondingly forming the Polarizer that thickness is the adhesive phase of 25 μ m (the about 180 μ m of thickness in one side in advance, Sumitomo Chemical (strain) system SQW-862), obtain the duplexer (B) of the PET film formation of Polarizer/adhesive phase/polycarbonate film/adhesive phase/polysiloxane processing.
Peel off the PET that polysiloxane is handled from this duplexer, and it is bonding with duplexer (A), obtain the duplexer of Polarizer/adhesive phase/polycarbonate film/adhesive phase/cement layer 1/ liquid crystal material layer/cement layer 2/PET film 2, then, peel off PET film 2, obtain rotatory polarization plate of the present invention.The gross thickness of this rotatory polarization plate is 300 μ m.
(embodiment 4)
About the liquid crystal cell of commercially available Transflective TFT liquid crystal indicator, with the rotatory polarization plate that bonding agent adhesive embodiments 3 obtains, estimate display characteristic, its result, any one rotatory polarization plate all presents good demonstration on reflective-mode and transmission mode.In addition, this display device is carried out following two kinds of endurancings, 1. under 60 ℃, 90%RH, carried out 500 hours, 2. carried out 500 hours at 80 ℃, drying regime, its result think any all do not come off and outward appearance such as crackle unusual.
(comparative example 1)
(thickness is 60 μ m with the bonding commercially available uniaxial tension polycarbonate film 1 of the bonding agent of 25 μ m, Δ nd is 135nm) and polycarbonate film 2 (thickness is 60 μ m, Δ nd is 270nm), obtain the duplexer that polycarbonate film 1/ adhesive phase/polycarbonate film 2 constitutes.
2 of the polycarbonate of this duplexer, bondingly forming the Polarizer that thickness is the adhesive phase of 25 μ m (the about 180 μ m of thickness in one side in advance, Sumitomo Chemical (strain) system SQW-862), obtain the rotatory polarization plate that Polarizer/adhesive phase/polycarbonate film 2/ adhesive phase/polycarbonate film 1 constitutes.The gross thickness of this rotatory polarization plate is 350 μ m.
(comparative example 2)
With forming thickness in advance on the PET film that polysiloxane is handled is the adhesive phase of 25 μ m, is bonded in the one side of commercially available uniaxial tension norborene class film 1 (thickness is 80 μ m, and Δ nd is 275nm, and JSR (strain) makes transparent resin (ARTON)).Then, in this film one side of adhesion agent not, bondingly forming the Polarizer that thickness is the adhesive phase of 25 μ m (the about 180 μ m of thickness in one side in advance, Sumitomo Chemical (strain) system SQW-862), obtain the duplexer of the PET film formation of Polarizer/adhesive phase/norborene class film 1/ adhesive phase/polysiloxane processing.
Peel off the PET film that polysiloxane is handled on this duplexer, (thickness is 80 μ m with commercially available uniaxial tension norborene class film 2, Δ nd is 130nm, JSR (strain) makes transparent resin (ARTON)) bonding, obtain the rotatory polarization plate that Polarizer/adhesive phase/norborene class film 1/ adhesive phase/norborene class film 2 constitutes.The gross thickness of this rotatory polarization plate is 390 μ m.
Can provide the liquid crystal material that not to have the support substrate film to be stacked in industrially preparing process on the macromolecule extension film layer by layer according to the present invention, thereby can obtain having when only being difficult to obtain the new optical laminate etc. of the significantly thinning of high performance on optical characteristics and film with the macromolecule extension film in the past, therefore, method of the present invention has high commercial value.
Claims (6)
1. the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: the liquid crystal material layer that (1) is fixed the liquid crystal aligning that forms on the orientation substrate, be bonded on the releasable substrate by the cement layer, peel off orientation substrate then, the liquid crystal material transcription on the releasable substrate, is obtained the 1st operation by the duplexer (A) that the releasable substrate/the cement layer/the liquid crystal material layer constitutes; (2) macromolecule stretched film and Polarizer are bonded together by bonding agent or cement, obtain the 2nd operation by Polarizer/bonding agent or the duplexer (B) that the cement layer/the macromolecule stretched film constitutes; And (3) described duplexer (A) and (B) bonding before or bonding after, peel off the 3rd operation of the releasable substrate of duplexer (A).
2. the manufacture method of optical laminate, it is characterized by, the manufacture method of described optical laminate is passed through following operation at least: the liquid crystal material layer that (1) is fixed the liquid crystal aligning that forms on the orientation substrate, be bonded on the releasable substrate 1 by cement layer 1, peel off orientation substrate then, with the liquid crystal material transcription on releasable substrate 1, then, by cement layer 2, releasable substrate 2 and liquid crystal material layer is bonding, peel off releasable substrate 1 afterwards, obtain the 1st operation of cement layer 1/ liquid crystal material layer/the duplexer (A) that cement layer 2/ releasable substrate 2 constitute of transcription to the releasable substrate 2; (2) macromolecule stretched film and Polarizer are bonded together by bonding agent or cement, obtain the 2nd operation by Polarizer/bonding agent or the duplexer (B) that the cement layer/the macromolecule stretched film constitutes; And (3) described duplexer (A) and (B) bonding before or bonding after, peel off the 3rd operation of the releasable substrate 2 of duplexer (A).
3. the manufacture method of optical laminate as claimed in claim 1 or 2 is characterized by, described liquid crystal material layer, and the liquid crystal material layer that is fixed to the row orientation that is formed under mesomorphic state by the liquid crystal material that shows as positive uniaxiality on the optics constitutes.
4. the ellipsoidal polarizing plate that constitutes of the optical laminate that obtains by manufacture method as claimed in claim 1 or 2.
5. the circular polarizing disk that constitutes of the optical laminate that obtains by manufacture method as claimed in claim 1 or 2.
6. possesses liquid crystal indicator at least as claim 4 or 5 described ellipsoidal polarizing plates or circular polarizing disk.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003015409A JP2004226761A (en) | 2003-01-23 | 2003-01-23 | Method for manufacturing optical layered body, and elliptically polarizing plate composed of the layered body, circularly polarizing plate and liquid crystal display comprising the layered body |
| JP2003015405A JP2004226757A (en) | 2003-01-23 | 2003-01-23 | Method for manufacturing optical layered body, elliptically polarizing plate and circularly polarizing plate comprising the layered body, and liquid crystal display |
| JP15409/2003 | 2003-01-23 | ||
| JP15405/2003 | 2003-01-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1519621A CN1519621A (en) | 2004-08-11 |
| CN100378512C true CN100378512C (en) | 2008-04-02 |
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| CNB2004100390776A Expired - Lifetime CN100378512C (en) | 2003-01-23 | 2004-01-29 | Mfg method of optical stacker and LCD device |
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| Country | Link |
|---|---|
| KR (1) | KR100746807B1 (en) |
| CN (1) | CN100378512C (en) |
| TW (1) | TWI265324B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4912635B2 (en) * | 2005-08-01 | 2012-04-11 | リンテック株式会社 | Sticking member and optical part sticking method |
| US8087140B2 (en) * | 2008-04-07 | 2012-01-03 | Nitto Denko Corporation | Optical member joining method and apparatus |
| US9223060B2 (en) | 2011-03-23 | 2015-12-29 | Dai Nippon Printing Co., Ltd. | Optical layered body, polarizer, and image display device |
| JP5945387B2 (en) | 2011-04-26 | 2016-07-05 | 日東電工株式会社 | Method for producing optical laminate |
| JP6704825B2 (en) * | 2016-09-27 | 2020-06-03 | ホシデン株式会社 | Method of manufacturing touch input device and touch input device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06308328A (en) * | 1993-04-22 | 1994-11-04 | Nippon Petrochem Co Ltd | Optical element |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JPH09281336A (en) * | 1996-04-12 | 1997-10-31 | Nitto Denko Corp | Optical film and liquid crystal display device |
| JP2001318223A (en) * | 2000-05-09 | 2001-11-16 | Sumitomo Chem Co Ltd | Phase difference plate |
| JP2002071947A (en) * | 2000-08-31 | 2002-03-12 | Nippon Mitsubishi Oil Corp | Method of continuously manufacturing optical element |
| JP2002196141A (en) * | 2000-12-26 | 2002-07-10 | Sumitomo Chem Co Ltd | Thin optical film laminate, method for producing the same, and application of the same to liquid crystal display element |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6537624B1 (en) * | 1997-12-24 | 2003-03-25 | Nippon Mitsubishi Oil Corporation | Liquid-crystal film |
| JP2000347037A (en) * | 1999-06-07 | 2000-12-15 | Nippon Mitsubishi Oil Corp | Manufacture of cholesteric liquid crystalline film |
-
2004
- 2004-01-15 TW TW093100992A patent/TWI265324B/en not_active IP Right Cessation
- 2004-01-20 KR KR1020040004078A patent/KR100746807B1/en active IP Right Grant
- 2004-01-29 CN CNB2004100390776A patent/CN100378512C/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06308328A (en) * | 1993-04-22 | 1994-11-04 | Nippon Petrochem Co Ltd | Optical element |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JPH09281336A (en) * | 1996-04-12 | 1997-10-31 | Nitto Denko Corp | Optical film and liquid crystal display device |
| JP2001318223A (en) * | 2000-05-09 | 2001-11-16 | Sumitomo Chem Co Ltd | Phase difference plate |
| JP2002071947A (en) * | 2000-08-31 | 2002-03-12 | Nippon Mitsubishi Oil Corp | Method of continuously manufacturing optical element |
| JP2002196141A (en) * | 2000-12-26 | 2002-07-10 | Sumitomo Chem Co Ltd | Thin optical film laminate, method for producing the same, and application of the same to liquid crystal display element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1519621A (en) | 2004-08-11 |
| KR100746807B1 (en) | 2007-08-06 |
| TW200428039A (en) | 2004-12-16 |
| TWI265324B (en) | 2006-11-01 |
| KR20040067989A (en) | 2004-07-30 |
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