CN100343737C - Mfg. method of optical stacker and LCD device - Google Patents
Mfg. method of optical stacker and LCD device Download PDFInfo
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- CN100343737C CN100343737C CNB2004100390780A CN200410039078A CN100343737C CN 100343737 C CN100343737 C CN 100343737C CN B2004100390780 A CNB2004100390780 A CN B2004100390780A CN 200410039078 A CN200410039078 A CN 200410039078A CN 100343737 C CN100343737 C CN 100343737C
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/05—Optical design plane
Abstract
There is provided a method for manufacturing optical layered body, which is characterized in comprising the following steps: a first manufacturing step to obtain a layered body (A) consisting of a removable substrate 1/adhesive layer 1/liquid crystal substance layer 1 by adhering a liquid crystal substance layer 1 having alignment of the liquid crystal fixed and being formed on an alignment substrate to a removable substrate 1 via an adhesive layer 1, and then stripping the alignment substrate to transfer the liquid crystal substance layer 1 onto the removable substrate 1; or a first manufacturing step to obtain a layered body (A') consisting of the adhesive layer 1/liquid crystal substance layer 1/adhesive layer 1'/removable substrate 1' by adhering a liquid crystal substance layer 1 having alignment of the liquid crystal fixed and being formed on an alignment substrate to a removable substrate 1 via an adhesive layer 1, stripping the alignment substrate to transfer the liquid crystal substance layer 1 onto the removable substrate 1, adhering the liquid crystal substance layer 1 and a removable substrate 1' via an adhesive layer 1', and stripping the removable substrate 1 to transfer the layers onto the removable substrate 1'; a second manufacturing step to obtain a layered body consisting of the removable substrate 1/adhesive layer 1/liquid crystal substance layer 1/tacky adhesive (adhesive) layer/liquid crystal substance layer 2/alignment substrate or the removable substrate 1'/adhesive layer 1'/liquid crystal substance layer 1/adhesive layer 1/self-adhesive (adhesive) layer/liquid crystal substance layer 2/alignment substrate by laminating a liquid crystal substance layer 2 having alignment of the liquid crystal fixed and being formed on an alignment substrate to the adhesive layer 1 of the above liquid crystal substance layer 1 or layered body (A') via the tacky adhesive layer 1; and a third manufacturing step of stripping the removable substrate 1.
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 (film) that the liquid-crystal compounds oriented layer constitutes, especially nematic structure, twisted nematic structure or the film that forms 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, the manufacture method (for example, the spy opens flat 8-278491 communique) of the optical element that formed by the liquid crystal material that does not use the supporting substrate film has also been proposed.By described method, liquid crystal material layer with the orientation that forms on the orientation substrate, 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 the supporting substrate film.
On the other hand, in recent years, for employed optical thin film in the various display device headed by the liquid crystal indicator, require it to have higher optical property, only use 1 layer of optical thin film can not meet the demands, thereby more be stacked use optical thin film.The broadband circular polarizing disk that the colorimetric compensation that for example can enumerate the stn liquid crystal display device obtains with 1/4 wave resistance plate in the circular polarizing disk and the folded broadband 1/4 wave resistance plate that obtains of 1/2 wave resistance flaggy 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 extension 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 Jap.P. 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 extension film, but because the restriction of optical characteristics or manufacturing process, can only the macromolecule extension film have been made thinlyyer limitedly, during therefore stacked use, had the thicker problem of thickness.
Aspect addressing these problems, though think that using above-mentioned spy to open the optical element that the such liquid crystal material by there not being the support substrate film of flat 8-278491 communique forms is effectively,, the industrially preparing process of stacked this optical element is establishment as yet.
Summary of the invention
Only the objective of the invention is to realize simultaneously the optical characteristics multifunction that is difficult to realize by the macromolecule extension film and the thinning significantly of film.Promptly, be conceived to realize down the formed optical thin film of liquid crystal material of excellent optical property by thinner state, manufacture method to the stacked optical element that is made of the liquid crystal material layer that does not have the support substrate film has been 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 1 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 1 transcription of liquid crystal material layer on releasable substrate 1, obtain the 1st operation of the duplexer (A) that constitutes by releasable substrate 1/ cement layer 1/ liquid crystal material layer 1, (2) the liquid crystal material layer 2 that the liquid crystal aligning that forms on the orientation substrate is fixed, bonding by bonding agent or cement and described liquid crystal material layer 1, obtain the 2nd operation of the duplexer of releasable substrate 1/ cement layer 1/ liquid crystal material layer, 1/ adhesive phase or cement layer/liquid crystal material layer 2/ orientation substrate formation, and (3) peel off the releasable substrate 1 and the orientation substrate of described duplexer, the 3rd operation of applying polaroid on cement layer 1 or liquid crystal material layer 2.
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 1 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 1 transcription of liquid crystal material layer on releasable substrate 1, then, by cement layer 1 ', releasable substrate 1 ' and liquid crystal material layer 1 is bonding, peel off releasable substrate 1 afterwards, go up transcription to releasable substrate 1 ', obtain the 1st operation of the duplexer (A) of cement layer 1/ liquid crystal material layer 1/ cement layer 1 '/releasable substrate 1 ' formation, (2) the liquid crystal material layer 2 that the liquid crystal aligning that forms on the orientation substrate is fixed, cement layer 1 by adhesive phase or cement layer and described duplexer (A) is bonded together, obtain the 2nd operation of the duplexer of releasable substrate 1 '/cement layer 1 '/liquid crystal material layer 1/ cement layer, 1/ adhesive phase or cement layer/liquid crystal material layer 2/ orientation substrate formation, and (3) peel off the releasable substrate 1 ' and the orientation substrate of described duplexer, the 3rd operation of applying polaroid on cement layer 1 ' or liquid crystal material layer 2.
The 3rd aspect of the present invention relates to the manufacture method of aforesaid optical laminate, and wherein said liquid crystal material layer 1 and liquid crystal material layer 2 have identical or different optical parametric.
The 4th aspect of the present invention relates to the manufacture method of aforesaid optical laminate, one deck at least in wherein said liquid crystal material layer 1 and the liquid crystal material layer 2, 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 single shaft tropism on the optics constitutes.
The 5th aspect of the present invention relates to the ellipsoidal polarizing plate that optical laminate that aforesaid manufacture method obtains forms.
The present invention the 6th aspect relates to the circular polarizing disk that optical laminate that aforesaid manufacture method obtains forms.
The present invention the 7th 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 used liquid crystal aligning of the present invention is fixed is fixing liquid crystal material layer by the method that adopts the liquid crystal material that fixedly is in state of orientation, as fixing method, can enumerate under the situation of using the high molecule liquid crystal material, by the state of orientation quenching be fixed as the method for glassy state and will have the low molecule of reactive functional groups or high molecule liquid crystal material orientation after, 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, oxa-cyclobutyl, carboxyl, hydroxyl, amino, isocyanate group, acid anhydrides etc., employing is suitable for not isoplastic method and reacts.
Can be used in 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 is not limited to bar-shaped or discoid.For example also can use the disk liquid-crystal compounds that is expressed as the 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, polybenzoxazoles 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 such as polyacrylate, polymethacrylate, polyethylene kind, polysiloxane-based, polyethers, poly-malonate 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, poly-three indenes classes etc. as the disk liquid-crystal compounds.
In addition, in not hindering the scope that manifests liquid crystal liquid crystal property, can in liquid crystal material, add and have the functional group that heat or photo-crosslinking etc. can take place or all cpds at position.As the functional group that cross-linking reaction can take place, can enumerate above-mentioned various reactive functional groups etc.
The formation method of the liquid crystal material layer that liquid crystal aligning is fixed is, by the following method the described liquid crystal material of molten condition or contain the composition that adds all cpds as required and be coated on the orientation substrate or and be coated on the orientation substrate the solution of said composition, then, with film drying, the thermal treatment (orientation of liquid crystal) that is coated on the orientation substrate, and adopt 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 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, be that purpose can be added dichromatic dye, conventional dyestuff or pigment etc. with dyeing.
For painting method, 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 increase the operation of utilizing heating or removing desolvate (drying) with methods such as warm winds.The thickness that applies the 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 be not preferred.
Then, if desired, can be by the orientation of formation liquid crystal such as thermal treatment, what be orientated afterwards is fixing again.Thermal treatment is meant film 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, its 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 and produces dysgenic problem to orientation substrate.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.Liquid crystal material adopts the method that is suitable for used liquid crystal material, the liquid crystal material layer on fixed orientation substrate under this state after finishing orientation by thermal treatment etc.
As described orientation substrate, can enumerate the example of the film of polyimide, polyamide, polyamide-imides, polyphenylene sulfide, polyphenylene oxide, 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 improved processing of the performance of alignment capability, it also can show sufficient alignment capability to the liquid crystal material that the present invention uses, insufficient or when not having alignment capability etc. when alignment capability, can use by following processing and make its film, for example these films suitably be heated extension 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 processing 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 on any one direction, carrying out above-mentioned each processing, 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, carry out orientation process along tilted direction as required.Carry out orientation process by direction along predetermined angular, liquid crystal film is carried out when stacked with the axial arrangement that can bring into play optimised optical properties, can realize possessing the applying (so-called axle is fitted to axle) of state of the MD of long film, perhaps 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 with the releasable substrate by the cement layer.
As described cement layer, liquid crystal material layer and releasable substrate are had sufficient engaging force, and can peel off the releasable substrate in subsequent handling, as long as it does not damage the optical characteristics of liquid crystal material layer, it is had no particular limits.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.
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, when using the light-cured type reactive materials, preferably add various known light triggers, utilize metal halide lamp, high-pressure sodium lamp, low pressure mercury lamp, xenon lamp, arc lamp, laser, radiate light source such as light source synchronously, 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.When 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 its effect that improves 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, single shaft is to extending 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, in described resin film, can contain lubricant or surface modifier.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, when peeling off the fissility substrate, the liquid crystal material layer is destroyed or can not be with the interface peel of required layer etc., so be not preferred.
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.
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 polarization film, the processed thing of PVA or the polyene oriented films such as desalination acid treatment thing of polyvinyl chloride etc. that extend behind absorption iodine in the hydrophilic macromolecule film of formation such as part alkali compound of PVA class polarization films such as polyvinyl alcohol (PVA) (PVA) or part acetalation PVA, ethylene-vinyl acetate copolymer and/or the double-colored pigment 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.
Method 1
Manufacture method as the liquid crystal material layer does not have specific limited, for example can make in order to following method.
At first, on orientation substrate, form filming of liquid crystal material, remove solvent etc. as required, wait the orientation of finishing liquid crystal, adopt the orientation of the method immobile liquid eutectic substance layer that is fit to used liquid crystal material by heating with suitable method.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 this 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 1,2. releasable substrate/cement layer 1/ liquid crystal material layer 1/ cement layer 1 ' etc."/" represents the interface of each layer in the superincumbent description, and following statement is identical.
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, go up the stacked liquid crystal material layer 2 that on orientation substrate, forms in addition at duplexer (A).For the liquid crystal material layer 2 that forms on the orientation substrate,, can on exposed liquid crystal material layer, protective clear layer be set herein in order to protect the surface of liquid crystal material layer, also can the adhesive surface protective film.The liquid crystal protective seam of this moment can be selected from described cement.
So just can obtain duplexer as described below.
1. fissility substrate/cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/liquid crystal material layer 2/ orientation substrate
2. fissility substrate/cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/liquid crystal material layer 2/ orientation substrate
3. fissility substrate/cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ orientation substrate
4. fissility substrate/cement layer/liquid crystal material layer 1/ cement/adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ orientation substrate
Wherein said liquid crystal material layer 1 and liquid crystal material layer 2 can have identical or different optical parametric.Promptly can be from the optical characteristics equal angles, the liquid crystal material layer that the selectivity combination is required.As optical parametric, can enumerate bed thickness, the liquid crystal material of liquid crystal material layer intrinsic or apparent birefringence, length of delay, orientation stationary state, have or not reverse, torsion angle etc.Length of delay is herein represented amassing of birefringence n and thickness d.In addition, cement layer or adhesive phase can or require characteristic to select arbitrarily according to fissility, can be the same or different.
Then, in the 3rd operation, peel off the releasable substrate and the orientation substrate of the duplexer that the 2nd operation obtains respectively, by bonding agent or cement, the polaroid of fitting on arbitrary of the release surface of duplexer obtains optical laminate of the present invention., when peeling off orientation substrate,, can on exposed liquid crystal material layer 2, protective clear layer be set herein in order to protect the surface of liquid crystal material layer 2, also can the adhesive surface protective film.The liquid crystal protective seam of this moment can be selected from described cement.In addition,, can after peeling off any one substrate, polaroid be fitted on the release surface, peel off another remaining substrate then, also can earlier 2 plate bases be peeled off, then one side applying polaroid therein for releasable substrate and orientation substrate.
Like this, have no particular limits, but will pass through these operations at least, just can obtain the optical laminate of the present invention of following composition.
(1) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/liquid crystal material layer 2
(2) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/liquid crystal material layer 2
(3) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/cement layer/liquid crystal material layer 2
(4) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement/adhesive phase or cement layer/cement layer/liquid crystal material layer 2
(5) cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/liquid crystal material layer 2/ adhesive phase or cement layer/polaroid
(6) cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/liquid crystal material layer 2/ adhesive phase or cement layer/polaroid
(7) cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ adhesive phase or cement layer/polaroid
(8) cement layer/liquid crystal material layer 1/ cement/adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ adhesive phase or cement layer/polaroid
(9) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/liquid crystal material layer 2/ cement layer
(10) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/liquid crystal material layer 2/ cement layer
(11) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ cement layer
(12) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement/adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ cement layer
(13) cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/liquid crystal material layer 2/ cement layer/adhesive phase or cement layer/polaroid
(14) cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/liquid crystal material layer 2/ cement layer/adhesive phase or cement layer/polaroid
(15) cement layer/liquid crystal material layer 1/ adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ cement layer/adhesive phase or cement layer/polaroid
(16) cement layer/liquid crystal material layer 1/ cement/adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ cement layer/adhesive phase or cement layer/polaroid
Method 2
Manufacture method as the liquid crystal material layer does not have specific limited, for example can make in order to following method.
For example, 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 by heating, the orientation of the method immobile liquid eutectic substance layer by being fit to used liquid crystal material, thus the liquid crystal material layer on orientation substrate, obtained.
In the 1st operation of the present invention, on the liquid crystal material layer on the orientation substrate that obtains, form cement layer 1, by this cement layer 1 liquid crystal material layer 1 and releasable substrate 1 are engaged, afterwards, make cement layer 1 reaction (curing) as required, peel off orientation substrate, with 1 transcription of liquid crystal material layer on releasable substrate 1.Secondly, form cement layer 1 ' on the liquid crystal material layer 1 after peeling off orientation substrate, by this cement layer 1 ' bonding releasable substrate 1 ', afterwards, make the 1 ' reaction (curing) of cement layer as required, peel off releasable substrate 1, with 1 transcription of liquid crystal material layer on releasable substrate 1 '.
Like this, the liquid crystal material layer 1 that is fixed of orientation just can transcription on releasable substrate 1 '.
Cement layer 1 after the curing on the liquid crystal material layer 1 that obtains has the effect of protective seam.In addition,, can select arbitrarily, can be the same or different according to fissility or desired characteristic for the releasable substrate that uses in the 1st operation 1,1 ' or cement layer 1,1 '.
Can obtain the duplexer (A) that cement layer 1 (protective seam)/liquid crystal material layer 1/ cement layer 1 '/releasable substrate 1 ' constitutes by the 1st operation.
Secondly, in the 2nd operation, the liquid crystal material layer 2 that forms on the orientation substrate is layered on the duplexer (A).For the liquid crystal material layer 2 that forms on the orientation substrate herein, in order to protect the surface of liquid crystal material layer, can on exposed liquid crystal material layer, protective clear layer be set, also can the adhesive surface protective film.The liquid crystal protective seam of this moment can be selected from described cement.So just can obtain duplexer as described below.
1. releasable substrate 1 '/cement layer 1 '/liquid crystal material layer 1/ cement layer 1 (protective seam)/adhesive phase or cement layer/liquid crystal material layer 2/ orientation substrate
2. releasable substrate 1 '/cement layer 1 '/liquid crystal material layer 1/ cement layer 1 (protective seam)/adhesive phase or cement layer/wherein said liquid crystal material layer 1 of cement layer (protective seam)/liquid crystal material layer 2/ orientation substrate and liquid crystal material layer 2 can have identical or different optical parametric.Promptly can be from the optical characteristics equal angles, the liquid crystal material layer that the selectivity combination is required.As optical parametric, can enumerate the liquid crystal material layer the intrinsic or apparent birefringence of bed thickness, liquid crystal material, length of delay, orientation fixed form, have or not reverse, torsion angle etc.In addition, cement layer or adhesive phase also can be selected arbitrarily according to fissility or desired characteristic, can be the same or different.
Then, in the 3rd operation, peel off the releasable substrate 1 and the orientation substrate of the duplexer that the 2nd operation obtains respectively, by bonding agent or cement, on arbitrary release surface, promptly on cement layer 1 ' or liquid crystal material layer 2, the applying polaroid obtains optical laminate of the present invention., when peeling off orientation substrate,, can on exposed liquid crystal material layer 2, protective clear layer be set herein in order to protect the surface of liquid crystal material layer 2, also can the adhesive surface protective film.The liquid crystal protective seam of this moment can be selected from described cement.In addition, for releasable substrate 1 ' and orientation substrate, can be after peeling off any one substrate, polaroid is fitted on the release surface, peel off another remaining substrate then, also can earlier 2 plate bases be peeled off, then one side applying polaroid therein.
Have no particular limits like this, but will pass through these operations at least, just can obtain the optical laminate of the present invention of following composition.
(1) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/liquid crystal material layer 2
(2) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/cement layer/liquid crystal material layer 2
(3) polaroid/adhesive phase or cement layer/liquid crystal material layer 2/ adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer
(4) polaroid/adhesive phase or cement layer/liquid crystal material layer 2/ cement layer/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer
(5) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/liquid crystal material layer 2/ cement layer
(6) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer/adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ cement layer
(7) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer
(8) polaroid/adhesive phase or cement layer/cement layer/liquid crystal material layer 2/ cement layer/adhesive phase or cement layer/cement layer/liquid crystal material layer 1/ cement layer
In addition, among the present invention, the liquid crystal material layer or the liquid crystal material layer of transcription on the releasable substrate that orientation on the orientation substrate can be fixed, stacked repeatedly by adhesive phase or cement layer, thus 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 abscission layer is bonded in the back side of this orientation substrate or the back side of this releasable substrate, by peeling off this orientation substrate or releasable substrate, can make the abscission layer of bonding agent become new releasable supporting substrate.If adopt this method, this bonding agent not only can be used as the bonding agent of stacked optical laminate of the present invention or is used for the bonding agent of stacked liquid crystal cell or other optical element, and arbitrary overturn adhesive surface etc. up and down simultaneously makes that to make degree of freedom bigger.
Among the present invention,, therefore between liquid crystal material layer and other layer, also can form abscission layer because the releasable substrate that uses has the preformed abscission layer that can peel off from this substrate on its plate face.Owing to formed 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.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 thickness and glass transition point beyond described scope, then poor effect, can not reach the filming of one of the object of the invention, so be not preferred.
In 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 qualification yet; can enumerate for example following reprint method etc.; reprint method is as follows: on fissility substrate film such as tygon, polypropylene, polyethylene terephthalate; adopt and apply, extrude the methods such as material that can form abscission layer; be pre-formed abscission layer with described thickness; closely bond this layer by adhesive phase or cement layer or protective clear layer, peel off the releasable substrate film then.
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 polaroid and liquid crystal material layer.With polaroid-bindnig 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 the film thinning of one of the object of the invention, so be not preferred.
The optical parametric of corresponding liquid crystal material layer and macromolecule extension film, optical laminate of the present invention can be brought into play compensating element,, the ellipsoidal polarizing plate of various liquid crystal indicators, the effect of circular polarizing disk.
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 the utilization of wave resistance plate, in addition, because produce asymmetry at retarding direction (molecular axis direction of film thickness direction), parts are improved at the visual angle that can be used for 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 is more than 250 ℃ or 250 ℃ to inversion temperature, and the glass transition temperature that Differential Scanning Calorimeter (DSC) records is 112 ℃.
Make the polymkeric substance-1 of 20g be dissolved in the N-N-methyl-2-2-pyrrolidone N-of 80g, make solution.With spinner this solution is coated on the Kapton (trade name " kapton " (カ プ ト Application) E.I.Du Pont Company's system) 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 (liquid crystal material layer 1) of 0.7 μ m on the Kapton.It is thick to measure actual membrane with the contact pin type film thickness gauge.
Then, under condition same as described above, thickness when only changing the spinner coating handle, thereby the actual thickness that is fixed on the Kapton to the row orientation texture that obtains polymkeric substance-1 is the liquid crystal material layer (liquid crystal material layer 2) of the orientation of 1.4 μ m.
(embodiment 1)
On the liquid crystal material layer that preparation example obtains (with Kapton back to 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 the releasable substrate of 25 μ m on it, be polyethylene terephthalate (PET) film 1 (S10, the Toray corporate system), by shining the UV of 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 1/ Kapton is peeled off Kapton, thereby 1 transcription of liquid crystal material layer to the PET film 1 as the releasable substrate, obtained the duplexer (A) that PET film 1/ cement layer 1/ liquid crystal material layer 1 constitutes.Herein, peel off PET film 1 after, liquid crystal film (A) Δ nd is 140nm.
On the liquid crystal material layer 1 of the liquid crystal duplexer (A) that obtains (with the back side of PET film), coating thickness is that the commercially available UV curing type cement (UV-3400) of 5 μ m is as cement layer 2, on the Kapton that above-mentioned preparation example obtains, the liquid crystal material layer 2 that stacked orientation is fixed, from the UV of the about 600mJ of PET film 1 side irradiation, this cement layer 2 is solidified.Peel off Kapton from this duplexer, obtain the duplexer that constitutes by PET film 1/ cement layer 1/ liquid crystal material layer 1/ cement layer 2/ liquid crystal material layer 2.
Face at the liquid crystal material layer 2 of this duplexer, fit and form the polaroid 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) after, peel off PET film 1, obtain the circular polarizing disk of the present invention that polaroid/adhesive phase/liquid crystal material layer 2/ cement layer 2/ liquid crystal material layer 1/ cement layer 1 constitutes.The gross thickness of this circular polarizing disk is 230 μ m.
(embodiment 2)
About the liquid crystal cell of commercially available Transflective TFT liquid crystal indicator, with the circular polarizing disk that bonding agent adhesive embodiments 1 obtains, estimate display characteristic, its result, any one circular polarizing disk 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 1 that preparation example obtains (with Kapton back to 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, in the above, stacked thickness is the releasable substrate of 25 μ m, i.e. polyethylene terephthalate (PET) film 1 (S10, Toray company), by shining the UV of 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 1/ Kapton is peeled off Kapton, thus with the transcription of liquid crystal material layer to PET film 1 as the releasable substrate.Secondly, on liquid crystal material layer 1, coating thickness is that the commercially available UV curing type cement (UV-3400) of 5 μ m is as cement layer 1 ', stacked thereon thickness is the PET film 1 ' (S10) as the releasable substrate of 25 μ m, by shining the UV of about 600mJ, this cement layer 1 ' is solidified.Then, peel off PET film 1, obtain the duplexer (A) that cement layer 1/ liquid crystal material layer 1/ cement layer 1 '/PET film 1 ' constitutes.Herein, peel off PET film 2 after, the Δ nd of duplexer (A) is 140nm.
On the liquid crystal material layer 1 of the liquid crystal duplexer (A) that obtains (with the back side of PET film), coating thickness is that the commercially available UV curing type cement (UV-3400) of 5 μ m is as cement layer 2, on the Kapton that above-mentioned preparation example obtains, the liquid crystal material layer 2 that stacked orientation is fixed, from the UV of the about 600mJ of PET film 1 side irradiation, this cement layer 2 is solidified.Peel off Kapton from this duplexer, obtain the duplexer that constitutes by PET film 1 '/cement layer 1 '/liquid crystal material layer 1/ cement layer 1/ cement layer 2/ liquid crystal material layer 2.
Face at the liquid crystal material layer 2 of this duplexer, fit and form the polaroid 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) after, peel off PET film 1 ', obtain the circular polarizing disk of the present invention that polaroid/adhesive phase/liquid crystal material layer 2/ cement layer 2/ cement layer 1/ liquid crystal material layer 1/ cement layer 1 ' constitutes.The gross thickness of this circular polarizing disk is 228 μ m.
(embodiment 4)
About the liquid crystal cell of commercially available Transflective TFT liquid crystal indicator, with the circular polarizing disk that bonding agent adhesive embodiments 3 obtains, estimate display characteristic, its result, any one circular polarizing disk 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)
With thickness is the bonding agent of 25 μ m, (thickness is 60 μ m to extending polycarbonate film 1 with commercially available single shaft, Δ nd is 135nm) and polycarbonate film 2 (thickness is 60 μ m, and Δ nd is 270nm) bonding, obtain the duplexer that polycarbonate film 1/ adhesive phase/polycarbonate film 2 constitutes.
Face at the polycarbonate 2 of this duplexer, bondingly forming the polaroid 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 circular polarizing disk that polaroid/adhesive phase/polycarbonate film 2/ adhesive phase/polycarbonate film 1 constitutes.The gross thickness of this circular polarizing disk is 350 μ m.
(comparative example 2)
With form thickness in advance on the PET film that polysiloxane is handled is that the adhesive phase of 25 μ m is bonded in commercially available single shaft to the one side of extending 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 polaroid 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 polaroid/adhesive phase/norborene class film 1/ adhesive phase/polysiloxane processing.
Peel off the PET film that polysiloxane is handled from this duplexer, (thickness is 80 μ m to extending norborene class film 2 with commercially available single shaft, Δ nd is 130nm, JSR (strain) makes transparent resin (ARTON)) bonding, obtain the circular polarizing disk that polaroid/adhesive phase/norborene class film 1/ adhesive phase/norborene class film 2 constitutes.The gross thickness of this circular polarizing disk 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 (7)
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 1 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, 1 transcription of liquid crystal material layer on releasable substrate 1, obtained the 1st operation of the duplexer (A) that is made of releasable substrate 1/ cement layer 1/ liquid crystal material layer 1; (2) the liquid crystal material layer 2 that the liquid crystal aligning that forms on the orientation substrate is fixed, bonding by bonding agent or cement and described liquid crystal material layer 1, obtain the 2nd operation of the duplexer that releasable substrate 1/ cement layer 1/ liquid crystal material layer, 1/ adhesive phase or cement layer/liquid crystal material layer 2/ orientation substrate constitute; And (3) peel off the releasable substrate 1 and the orientation substrate of described duplexer, the 3rd operation of applying polaroid on cement layer 1 or liquid crystal material layer 2.
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 1 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 1 transcription of liquid crystal material layer on releasable substrate 1, then, by cement layer 1 ', releasable substrate 1 ' and liquid crystal material layer 1 are bonded together, peel off releasable substrate 1 afterwards, go up transcription, obtain the 1st operation of the duplexer (A) of cement layer 1/ liquid crystal material layer 1/ cement layer 1 '/releasable substrate 1 ' formation to releasable substrate 1 '; (2) the liquid crystal material layer 2 that the liquid crystal aligning that forms on the orientation substrate is fixed, cement layer 1 by adhesive phase or cement layer and described duplexer (A) is bonded together, and obtains the 2nd operation of the duplexer of releasable substrate 1 '/cement layer 1 '/liquid crystal material layer 1/ cement layer, 1/ adhesive phase or cement layer/liquid crystal material layer 2/ orientation substrate formation; And (3) peel off the releasable substrate 1 ' and the orientation substrate of described duplexer, the 3rd operation of applying polaroid on cement layer 1 ' or liquid crystal material layer 2.
3. the manufacture method of optical laminate as claimed in claim 1 or 2 is characterized by, and described liquid crystal material layer 1 and liquid crystal material layer 2 have identical or different optical parametric.
4. the manufacture method of optical laminate as claimed in claim 1 or 2, it is characterized by, one deck at least in described liquid crystal material layer 1 and the liquid crystal material layer 2, 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 single shaft tropism on the optics constitutes.
5. the ellipsoidal polarizing plate that constitutes of the optical laminate that obtains by manufacture method as claimed in claim 1 or 2.
6. the circular polarizing disk that constitutes of the optical laminate that obtains by manufacture method as claimed in claim 1 or 2.
7. possesses liquid crystal indicator at least as claim 5 or 6 described ellipsoidal polarizing plates or circular polarizing disk.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15401/2003 | 2003-01-23 | ||
| JP2003015411A JP2004226763A (en) | 2003-01-23 | 2003-01-23 | Method for manufacturing optical layered body, and elliptically polarizing plate, circularly polarizing plate and liquid crystal display comprising the layered body |
| JP2003015401A JP2004226753A (en) | 2003-01-23 | 2003-01-23 | Method for manufacturing optical layered body, and elliptically polarizing plate, circularly polarizing plate comprising the layered body and liquid crystal display |
| JP15411/2003 | 2003-01-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1519627A CN1519627A (en) | 2004-08-11 |
| CN100343737C true CN100343737C (en) | 2007-10-17 |
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| CNB2004100390780A Expired - Fee Related CN100343737C (en) | 2003-01-23 | 2004-01-29 | Mfg. method of optical stacker and LCD device |
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| Country | Link |
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| KR (1) | KR100746808B1 (en) |
| CN (1) | CN100343737C (en) |
| TW (1) | TWI265323B (en) |
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| JP2019159197A (en) * | 2018-03-15 | 2019-09-19 | 住友化学株式会社 | Method of manufacturing optical laminate and method of manufacturing optical laminate with adhesive layers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0553016A (en) * | 1991-08-26 | 1993-03-05 | Nippon Oil Co Ltd | Production of compensation plate for liquid crystal display element |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JP2001183525A (en) * | 1999-12-22 | 2001-07-06 | Nippon Petrochem Co Ltd | Method of producing elliptically polarizing plate |
| JP2002071947A (en) * | 2000-08-31 | 2002-03-12 | Nippon Mitsubishi Oil Corp | Method of continuously manufacturing optical element |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3103223B2 (en) * | 1992-12-01 | 2000-10-30 | 富士通株式会社 | Color liquid crystal display |
| JP2000162584A (en) * | 1998-11-26 | 2000-06-16 | Nitto Denko Corp | Optical member, cell substrate and liquid crystal display device |
| JP3399463B2 (en) * | 2000-12-21 | 2003-04-21 | 松下電器産業株式会社 | Color liquid crystal display device |
-
2004
- 2004-01-15 TW TW093100991A patent/TWI265323B/en not_active IP Right Cessation
- 2004-01-20 KR KR1020040004076A patent/KR100746808B1/en not_active IP Right Cessation
- 2004-01-29 CN CNB2004100390780A patent/CN100343737C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0553016A (en) * | 1991-08-26 | 1993-03-05 | Nippon Oil Co Ltd | Production of compensation plate for liquid crystal display element |
| JPH08278491A (en) * | 1995-04-07 | 1996-10-22 | Nippon Oil Co Ltd | Production of liquid crystal polymer film |
| JP2001183525A (en) * | 1999-12-22 | 2001-07-06 | Nippon Petrochem Co Ltd | Method of producing elliptically polarizing plate |
| JP2002071947A (en) * | 2000-08-31 | 2002-03-12 | Nippon Mitsubishi Oil Corp | Method of continuously manufacturing optical element |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1519627A (en) | 2004-08-11 |
| KR100746808B1 (en) | 2007-08-06 |
| TWI265323B (en) | 2006-11-01 |
| KR20040067988A (en) | 2004-07-30 |
| TW200420918A (en) | 2004-10-16 |
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