CN101040199A - Antistatic optical film, antistatic adhesive optical film and image display - Google Patents
Antistatic optical film, antistatic adhesive optical film and image display Download PDFInfo
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- CN101040199A CN101040199A CNA2005800345415A CN200580034541A CN101040199A CN 101040199 A CN101040199 A CN 101040199A CN A2005800345415 A CNA2005800345415 A CN A2005800345415A CN 200580034541 A CN200580034541 A CN 200580034541A CN 101040199 A CN101040199 A CN 101040199A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/16—Optical coatings produced by application to, or surface treatment of, optical elements having an anti-static effect, e.g. electrically conducting coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
- G02B1/116—Multilayers including electrically conducting layers
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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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- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Polarising Elements (AREA)
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- Surface Treatment Of Optical Elements (AREA)
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Abstract
Disclosed is an antistatic optical film having excellent thermal stability wherein antistatic effects do not decrease even when the film is exposed to high temperature environments. Such an antistatic optical film is characterized in that an antistatic layer is arranged on at least one side of an optical film, and the antistatic layer contains a metal oxide and a hydrophilicity-imparting agent.
Description
Technical field
The present invention relates to be laminated with the charge-preventing optical film of antistatic backing at least one face of blooming.In addition, the present invention relates on the antistatic backing of above-mentioned charge-preventing optical film, be laminated with the antistatic adhesive optical film of adhesive phase.And then, relate to image display devices such as the liquid crystal indicator that uses above-mentioned charge-preventing optical film, antistatic adhesive optical film, organic EL display, PDP.As above-mentioned blooming, can enumerate polaroid, polarizer, optical compensation films, brightness enhancement film, and further be laminated with material of these bloomings etc.
Background technology
LCDs etc. because the mode that its image forms must dispose polarizer in the both sides of liquid crystal cells, generally are pasted with polaroid.In addition, in order to improve the display quality of display screen,, also use various optical elements except liquid crystal display configuration polaroid.For example, use as the angle of visibility that prevents painted polarizer, is used to improve the angle of visibility of LCDs and enlarge film and then be used to improve the brightness enhancement film etc. of the contrast of display screen.These films are referred to as blooming.
For fear of during arriving the consumer transport and manufacturing process in to the surface tear and the pollution of blooming, be fitted with surface protection film on the surface of these bloomings usually.This surface protection film is stripped from the situation of the identical or other surface protection film of fitting once more after perhaps temporarily peeling off after being attached at LCD etc.So, when peeling off this surface protection film, producing static, the impaired problem such as LCD screen circuit such as grade that this static causes appears.In addition, thus have that the inner array element of couple LCD screen exerts an influence, it further exerts an influence to liquid crystal aligning again and bring out bad problem.In addition, just when the stripper surface diaphragm, also can cause same problem to take place in manufacturing process or because of the friction between the blooming due to consumer's the using method.In order to address the above problem, propose to give blooming such as polaroid in case electrostatic scheme.For example, disclose the blooming that has antistatic backing that antistatic backing is set on the surface of blooming, be provided with transparency conducting layer in the one or both sides of blooming and the blooming that obtains.
On the other hand, when blooming is pasted liquid crystal cells, use bonding agent usually.In addition, in order to reduce the loss of light, the bonding between blooming and liquid crystal cells or the blooming is usually with bonding agent general material adhesion separately.In this case, from having the angle of advantages such as making blooming adhesion and drying-free operation, general use sets in advance the adhesive optical film of bonding agent as adhesive phase in a side of blooming.
When stating adhesive optical film in the use, be cut into the size of display screen, be attached on the liquid crystal display and install.Nowadays the use field of liquid crystal display is not limited to the display screen of computer, also is used for the various fields such as on-vehicle parts of moving display screen, auto navigation and the panel board etc. of LCD TV and mobile phone etc., and its environment for use becomes harsh.
For above-mentioned adhesive optical film, also proposed to give the scheme of static electricity resistance.As the material that antistatic agent uses the optical characteristics do not make blooming itself to reduce, what attracted attention especially is tin oxide, indium oxide, reach metal oxide such as antimony oxide.Following scheme is for example proposed: the polaroid that constitutes for containing adhesive phase, lower support layer, polarizer and top supporting layer, contain I at above-mentioned adhesive phase
2O
3, SnO
2, or the scheme (patent documentation 1) of electroconductive particle such as NiAu.But, use the antistatic backing of these metal oxides, in 40～80 ℃ of temperature conditions following times under manufacturing process that places liquid crystal display and environment for use, sheet resistance value slowly rises, and has the problem that diminishes original electrostatic-proof function.
Patent documentation 1: the spy opens the 2003-294951 communique
Summary of the invention
The purpose of this invention is to provide the charge-preventing optical film that is laminated with antistatic backing at least one face of blooming, also can not reduce anti-static effect, have excellent thermal stability even be exposed under the hot environment.Other purpose provides the image display device that uses above-mentioned charge-preventing optical film.
In order to solve above-mentioned problem, the inventor etc. carry out meticulous research repeatedly, found that, can solve above-mentioned problem by following charge-preventing optical film, thereby finish the present invention.
That is, the present invention relates to charge-preventing optical film, its at least one face at blooming is laminated with antistatic backing, it is characterized in that, described antistatic backing contains metal oxide and water wettability imparting agent.
Discoveries such as the inventor: by in antistatic backing, containing the water wettability imparting agent, can suppress the rising of the sheet resistance value under the hot environment, suppress the reduction of electrostatic-proof function.
The preferred tin oxide class of described metal oxide.
In addition, described water wettability imparting agent preferred hydrophilic silicon dioxide particles.
In addition, the present invention relates on the antistatic backing of above-mentioned charge-preventing optical film, be laminated with the antistatic adhesive optical film of adhesive phase.
Above-mentioned adhesive phase is preferably formed by acrylic adhesives.
By between blooming and adhesive phase, antistatic backing being set, can obtain anti-static effect, optical characteristics, adhesion characteristic and outward appearance excellence, and the antistatic adhesive optical film of the adhesiveness excellence of antistatic backing and adhesive phase.
Specifically; owing between blooming and adhesive phase, be provided with antistatic backing; thereby the anti-static effect excellence, can suppress the static of surface protection film due to peeling off and the generation of the static due to the friction of blooming, can prevent the directed bad of the breakage of circuit and liquid crystal.
In addition, the present invention relates to use at least the image display device of 1 above-mentioned charge-preventing optical film or antistatic adhesive optical film.Charge-preventing optical film of the present invention and antistatic adhesive optical film according to the various use-patterns of image display devices such as liquid crystal indicator, can use 1 or be used in combination multi-disc.
Description of drawings
Fig. 1 a: example that is the sectional view of antistatic adhesive optical film of the present invention.
Symbol description
1: blooming
2: antistatic backing
3: adhesive phase
Embodiment
As shown in Figure 1, antistatic adhesive optical film of the present invention has antistatic backing 2, adhesive phase 3 in the one side stacked above one another of blooming 1.In Fig. 1, demonstration be the situation that is provided with adhesive phase 3 in the one side of blooming 1, but adhesive phase 3 can exist on the two sides of blooming.In addition, for the adhesive phase 3 of other face, also can have antistatic backing 2.
The antistatic backing 2 of charge-preventing optical film of the present invention contains metal oxide and water wettability imparting agent.
Can exemplify out tin oxide class, antimony oxide class, indium oxide class and Zinc-oxide-based etc. as metal oxide.Wherein, from the transparency, to the angle of the adhesiveness of blooming etc., preferred tin oxide class.As the material of tin oxide class, can exemplify out tin oxide, antimony-doped tin oxide, indium doped stannum oxide, aluminium doped stannum oxide, tungsten doped stannum oxide, titanium dioxide-cesium oxide-tin oxide composite and titanium dioxide-tin oxide composite etc.Metal oxide preferably uses the material of finely particulate or needle-like.Atomic mean grain size is about 1～100nm, preferred 2～50nm.
Bloomings such as polaroid dissolve in the organic solvent of non-water class, its optical characteristics variation after the rotten deterioration.Like this, because the blooming organic solvent resistance is poor, when forming antistatic backing, preferably use the dispersion liquid (colloidal sol) that metal oxide is scattered in hydrophilic solvent and obtains.
As the hydrophilic solvent preferred water.In addition, also can and water and hydrophilic organic solvent.As hydrophilic solvent, can exemplify out alcohols such as methyl alcohol, ethanol, n-propanol, isopropyl alcohol, normal butyl alcohol, isobutyl alcohol, sec-butyl alcohol, the tert-butyl alcohol, n-amyl alcohol, isoamylol, sec-amyl alcohol, tert-pentyl alcohol, 1-ethyl-1-propyl alcohol, 2-methyl-1-butene alcohol, n-hexyl alcohol and cyclohexanol.
Even the water wettability imparting agent has the effect that also can make antistatic backing keep the moisture of trace for a long time under hot environment, this micro-moisture can suppress the reduction of the electrostatic-proof function of antistatic backing.
Can exemplify out as hydrophilic imparting agent: hydrophilic inorganic based fine particles such as the water wettability silicon dioxide particles as cataloid, water wettability titanium oxide based particulate, water wettability alumina type particulate and water wettability antimony oxide based fine particles; The slaine of polyacrylic resin, polymethacrylate resin, polyacrylic acid analog copolymer, polymethacrylic acid multipolymer, poly-sulfonic acid analog copolymer and these resins; The water absorbent polymer class of in disposable diaper etc., using, and the water wettability of water absorptivity gel-like etc. the compound etc. of preserving moisture.These water wettability imparting agents can use separately, also can merge use more than 2 kinds.Wherein, from the angle of the transparency of blooming, preferred hydrophilic silicon dioxide particles, polyacrylic resin or polyacrylic acid analog copolymer, special preferred hydrophilic silicon dioxide particles.
The water wettability silicon dioxide particles, the general known cataloid that has, preferred modulation contains the aqueous liquid dispersion of water wettability silicon dioxide particles.Cataloid can be any of acid (pH1～4) stable type silicon dioxide gel, alkali (pH9～10.5) stable type silicon dioxide gel.Preferred 5～the 100nm of dispersion particle diameter of cataloid, further preferred 10～30nm.When disperseing particle diameter less than 5nm, the easy aggegation of silicon dioxide has water wettability to give the tendency that effect diminishes.On the other hand, when surpassing 100nm, the haze value of blooming uprises, the tendency that has the transparency to reduce.
With respect to metal oxide 100 weight portions, preferred 5～200 weight portions of the addition of water wettability imparting agent, further preferred 5～150 weight portions, preferred especially 5～100 weight portions.If surpass 200 weight portions, then there is the tendency that causes transparency reduction owing to the haze value rising of blooming, on the other hand,, then there is water wettability to give the tendency of deleterious if less than 5 weight portions.
As the formation material of antistatic backing, with the epithelium that improves antistatic agent form property, with the adhesiveness of blooming etc. be purpose, can blended rubber stick composition.When forming antistatic backing, use when containing the dispersion liquid (colloidal sol) of metal oxide, preferably use the adhesive component of water-soluble or water dispersible.As adhesive component, can exemplify out polyurethanes resin, polyester resin, acrylic resin, polyethers resin, cellulosic resin, polyvinyl alcohol resin, epoxy resin, polyvinylpyrrolidone, polystyrene resins, polyglycol, pentaerythrite etc.Special optimization polyurethane resinoid, polyester resin, acrylic resin.Can suitably use a kind of these adhesive components or merge use more than 2 kinds according to its purposes.Though and different, with respect to metal oxide 100 weight portions, the use amount of adhesive component is generally below 200 weight portions use amount of adhesive component, preferred 5～150 weight portions according to the kind of metal oxide.
The sheet resistance value of above-mentioned antistatic backing is preferably 1 * 10
12Below Ω/, further preferred 1 * 10
11Below Ω/.Sheet resistance value surpasses 1 * 10
12During Ω/, electrostatic-proof function is insufficient, owing to surface protection film peel off and the friction of blooming produces static, charged, the circuit that causes liquid crystal cells sometimes damage or liquid crystal aligning bad.
Bonding agent as the adhesive phase 3 that forms antistatic adhesive optical film of the present invention, be not particularly limited, for example can suitably select with polymkeric substance such as acrylic polymers, silicone polymkeric substance, polyester, polyurethane, polyamide, polyethers, fluorine class and rubber-like is that the material of base polymer uses.Particularly, preferably use the optical transparence excellence, demonstrate suitable wetting quality, compendency and close-burning adhesion characteristic, the material that weatherability and thermotolerance etc. are excellent.Material as showing such feature preferably uses acrylic adhesives.
Acrylic adhesives will be that the acrylic polymers of main framing is as base polymer with the monomeric unit of (methyl) alkyl acrylate.(methyl) acrylate is meant acrylate and/or methacrylate, and (methyl) of the present invention also is the same meaning.The average carbon atom number of the alkyl of (methyl) alkyl acrylate of the main framing of formation acrylic polymers is about 1～12, as the object lesson of (methyl) alkyl acrylate, can illustration (methyl) methyl acrylate, (methyl) ethyl acrylate, (methyl) butyl acrylate, (methyl) 2-EHA etc.These compounds can be used alone or in combination.Wherein, the carbon number of preferred alkyl is (methyl) alkyl acrylate of 1～9.
In the aforesaid propylene acids polymkeric substance, in order to improve cohesiveness and thermotolerance, can import various monomers more than a kind by copolymerization.Object lesson as such comonomer can exemplify out (methyl) acrylic acid 2-hydroxyl ethyl ester, (methyl) acrylic acid 2-hydroxypropyl acrylate, (methyl) acrylic acid 4-hydroxy butyl ester, the own ester of (methyl) acrylic acid 6-hydroxyl, (methyl) acrylic acid 8-hydroxyl monooctyl ester, (methyl) acrylic acid 10-hydroxyl ester in the last of the ten Heavenly stems, (methyl) acrylic acid 12-hydroxyl dodecyl ester or (methyl) acrylic acid (4-methylol cyclohexyl) ester etc. and contain the monomer of hydroxyl; (methyl) acrylic acid, (methyl) acrylic acid carboxylic ethyl ester, (methyl) acrylic acid carboxylic pentyl ester, itaconic acid, maleic acid, fumaric acid, crotonic acid etc. contain the monomer of carboxyl; Maleic anhydride, itaconic anhydride etc. contain the monomer of anhydride group; Acrylic acid caprolactone addition product; Styrene sulfonic acid and allyl sulphonic acid, 2-(methyl) acrylamide-2-methyl propane sulfonic acid, (methyl) acrylamide propane sulfonic acid, sulfopropyl (methyl) acrylate, (methyl) acryloxy naphthalene sulfonic acids etc. contain sulfonic monomer; 2-hydroxyethyl acryloyl group phosphate etc. contains the monomer of phosphate etc.
In addition, can enumerate following substances as being used for the example of the monomer of modification: (methyl) acrylamide, N, N-dimethyl (methyl) acrylamide, N-butyl (methyl) acrylamide, and (N-replacement) amide-type monomers such as N-methylol (methyl) acrylamide, N-hydroxymethyl-propane (methyl) acrylamide; (methyl) acrylic-amino ethyl ester, (methyl) acrylic acid N, (methyl) acrylic acid alkyl aminoalkyl esters monomers such as N-dimethylamino ethyl ester, (methyl) acrylic acid tert-butyl group amino ethyl ester; (methyl) alkoxyalkyl acrylate class monomers such as (methyl) acrylic acid methoxyl ethyl ester, (methyl) acrylic acid ethoxy ethyl ester; Succinimide class monomers such as N-(methyl) acryloyl-oxy methylene succinimide and N-(methyl) acryloyl-6-oxygen hexa-methylene succinimide, N-(methyl) acryloyl-8-oxygen eight methylene succinimides, N-acryloyl morpholine etc.
Can also use vinyl monomers such as vinyl acetate, vinyl propionate, N-vinyl pyrrolidone, methyl ethylene pyrrolidone, vinylpyridine, ethene piperidones, ethene pyrimidine, ethene piperazine, ethene pyrazine, ethene pyrroles, ethene imidazoles, ethene azoles, ethene morpholine, N-vinyl carboxylic acid amide-type, styrene, α-Jia Jibenyixi, N-caprolactam; Cyanoacrylate such as vinyl cyanide, methacrylonitrile monomer; (methyl) acrylic acid glyceride etc. contains the acrylic monomer of epoxy radicals; Glycols acrylate monomers such as (methyl) polyalkylene glycol acrylate ester, (methyl) acrylic acid polypropylene glycol ester, (methyl) acrylic acid methoxyl glycol ester, (methyl) acrylic acid MPEG ester; Acrylic ester monomers such as (methyl) acrylic acid tetrahydrofurfuryl alcohol ester, fluorine-containing (methyl) acrylate, silicone (methyl) acrylate or acrylic acid 2-methoxyl ethyl ester etc.
Wherein, from as the blooming purposes to the cohesiveness of liquid crystal cells, the angle of adhesive durability, preferably use acrylic acid etc. to contain the monomer of carboxyl.
The ratio of the above-mentioned comonomer in the acrylic polymers is not particularly limited, but preferably counts about 0.1～10% with weight rate.
The mean molecular weight of acrylic polymers is not particularly limited, but preferable weight-average molecular weight is about 300,000～2,500,000.The manufacturing of aforesaid propylene acids polymkeric substance can for example can suitably be selected radical polymerizations such as mass polymerization, solution polymerization process, suspension polymerization with various known method manufacturings.As radical polymerization initiator, can use azo class, the various known materials of peroxide.Temperature of reaction is generally about 50～80 ℃, and the reaction time was set as 1～8 hour.In addition, in above-mentioned autofrettage, also preferred solution polymerization is generally used ethyl acetate, toluene etc. as the solvent of acrylic polymers.Solution concentration is set as about 20～80 weight % usually.
Base polymer as rubber adhesive, can exemplify out natural rubber, isoprenoid rubber, styrene-butadiene class rubber, reclaimed rubber, polyisobutylene class rubber, also have styrene-isoprene-phenylethene class rubber, s-B-S class rubber etc.As the base polymer of silicone bonding agent, can use for example dimethyl polysiloxane, diphenyl polysiloxane etc., also can use the material that in these base polymers, has imported functional groups such as carboxyl and obtained.
In addition, above-mentioned bonding agent is preferably made the adhesive compositions that contains crosslinking chemical.As the polyfunctional compound that can in bonding agent, cooperate, can enumerate organic class crosslinking chemical or multi-functional metallo-chelate.As organic class crosslinking chemical, can enumerate epoxies crosslinking chemical, isocyanates crosslinking chemical, imines class crosslinking chemical etc.As organic class crosslinking chemical, preferred isocyanate class crosslinking chemical.Multi-functional metallo-chelate is the material of polyvalent metal and organic compound covalent bonding or coordination bonding.As polyvalent metal atom, can enumerate Al, Cr, Zr, Co, Cu, Fe, Ni, V, Zn, In, Ca, Mg, Mn, Y, Ce, Sr, Ba, Mo, La, Sn, Ti etc.Oxygen atom etc. can be enumerated as the atom in the organic compound of covalent bonding or coordination bonding, Arrcostab, alcoholic compound, carboxylic acid compound, ether compound, ketonic compound etc. can be enumerated as organic compound.
The cooperation ratio of base polymers such as acrylic polymers and crosslinking chemical is not particularly limited, but, with respect to base polymer (solid constituent) 100 weight portions, about usually preferred crosslinking chemical (solid constituent) 0.01～10 weight portion, further about preferred 0.1～5 weight portion.
And then, as required, can also in above-mentioned bonding agent, suitably use bonding imparting agent, plastifier, the filling agent that contains glass fibre, beaded glass, metal powder, other inorganic powders etc., pigment, colorant, filling agent, antioxidant, ultraviolet light absorber, silane coupling agent etc., in addition, in the scope that does not exceed the object of the invention, also can suitably use various adjuvants.In addition, also can make and contain particulate and demonstrate adhesive phase of light diffusing etc.
Blooming 1 as using in antistatic adhesive optical film of the present invention can use material used in the formation of image display devices such as liquid crystal indicator, and its kind is not particularly limited.For example, can enumerate polaroid as blooming.The general material that has transparent protective film at the one or both sides of polarizer that uses of polaroid.
Polarizer is not particularly limited, and can use various materials.As polarizer, can exemplify the bitintability material that hydrophilic macromolecule films such as the polyvinyl alcohol film of sening as an envoy to, part dimethoxym ethane polyvinyl alcohol film, the partly-hydrolysed film of ethylene vinyl acetate copolymer class adsorb iodine or bitintability dyestuff, and carry out uniaxial tension and the material that obtains, polyalkenes oriented films such as the desalination acid treatment thing of the processed thing of polyvinyl alcohol (PVA) or Polyvinylchloride etc.Wherein, the polarizer that preferably contains bitintability materials such as polyvinyl alcohol film and iodine.The thickness of these polarizers is unqualified, is generally about 5～80 μ m.
The polyvinyl alcohol film dyeed with iodine and carry out uniaxial tension and the polarizer that obtains, for example polyvinyl alcohol (PVA) can be impregnated in the aqueous solution of iodine and dye, make for 3～7 times that are stretched to original length.As required, also can impregnated in the aqueous solution of the potassium iodide that can contain boric acid or zinc sulfate, zinc chloride etc. etc.And then, as required, also can before dyeing, the polyvinyl alcohol film immersion be washed in water.By the polyvinyl alcohol film is washed, spot or the obstruction that not only can clean polyvinyl alcohol film surface prevent agent, also have by making the swelling of polyvinyl alcohol film prevent uneven effects such as stain.Stretching can be carried out after with iodine staining, also can stretch on the Edge Coloring limit, in addition, also can use iodine staining after stretching.Also can in the aqueous solution of boric acid or potassium iodide etc. or water-bath, stretch.
The material of the transparent protective film that is provided with as the one or both sides that are formed on above-mentioned polarizer is preferably at the material of aspect excellences such as the transparency, physical strength, thermal stability, moisture barrier, isotropy.For example, can enumerate acrylic polymerss such as cellulosic polymers such as polyester polymers such as polyethylene terephthalate or PEN, diacetyl cellulose or tri acetyl cellulose, polymethylmethacrylate, polystyrene or acrylonitrile styrene copolymer styrenic polymer, polycarbonate polymers etc. such as (AS resins).In addition; can also enumerate tygon; polypropylene; ring system or polyolefin with norborene structure; polyolefin polymers as ethylene propylene copolymer; the ethlyene dichloride base polymer; acylamide polymer such as nylon or aromatic polyamide; the acid imide polymkeric substance; the sulfone base polymer, polyether sulfone polymkeric substance, polyether-ether-ketone polymer; the polyphenylene sulfide base polymer; vinyl alcohol polymer, vinylidene chloride base polymer, polyvinyl butyral base polymer; the aryl nitrone polymkeric substance; the polyoxymethylene base polymer, epoxide polymer, perhaps above-mentioned mixture of polymers etc. is as the example that forms transparent protective film.Transparent protective film can form the cured layer of the resin of thermohardening types such as acrylic compounds, polyurethanes, acroleic acid polyurethane class, epoxies, silicone, ultraviolet hardening.
In addition, open the polymer film described in the 2001-343529 communique (WO01/37007) the spy, for example, can enumerate and contain (A) and have at side chain and replace and/or the thermoplastic resin of non-substituted imides base and (B) have at side chain and replace and/or the resin combination of the thermoplastic resin of non-substituted-phenyl and itrile group.As object lesson, can enumerate the film of the resin combination that comprises the alternating copolymer that contains isobutylene and N-methyl maleimide and acrylonitrile styrene copolymer.Film can use the film of mixing extrusion molding product of containing resin combination etc.
The thickness of diaphragm can suitably determine, but from the angle of the operation of intensity and operability etc., film etc., is generally about 1～500 μ m.Preferred especially 5～200 μ m.
In addition, diaphragm preferably is not with color as far as possible.Therefore, the phase differential that preferably uses the represented film thickness direction of Rth=(nx-nz) d (nx is the refractive index of the slow-axis direction in the membrane plane, and nz is the refractive index of film thickness direction, and d is a film thickness)-90nm～+ diaphragm of 75nm.Phase difference value (Rth) by using described thickness direction for-90nm～+ diaphragm of 75nm, can eliminate painted (optical clouration) of the polaroid that diaphragm causes substantially.Thickness direction phase differential (Rth) further preferred-80nm～+ 60nm, especially preferred-70nm～+ 45nm.
As diaphragm, from the angle of polarization characteristic or permanance etc., cellulosic polymers such as preferred tri acetyl cellulose.Preferred especially tri acetyl cellulose film.When the both sides of polarizer are provided with diaphragm, can use in its table and contain the diaphragm of same polymer material, also can use the diaphragm that contains different polymeric material etc.Above-mentioned polarizer and diaphragm are situated between usually by adhesions such as water system cementing agents.As the water system cementing agent, it is latex class, aqueous polyurethane, water system polyester etc. that isocyanates cementing agent, polyvinyl alcohol cementing agent, gelatin class cementing agent, ethene can example be shown.
For above-mentioned transparent protective film not with the face of polarizer bonding, can implement hard conating and antireflection and handle, with prevent to adhere, diffusion and anti-dazzle be the processing of purpose.
Be coated with firmly and handle to prevent that polaroid surface tear etc. from being that purpose is implemented; can be in the mode on the surface that is attached to transparent protective film etc., form excellent sclerosis epitheliums such as suitable hardness that ultraviolet curing resin produced such as for example acrylic compounds, silicone etc. and smooth property.Antireflection is handled to prevent that external light on the polaroid surface is reflected into purpose and implements, and can form antireflection film according to standard in the past and wait and realize.In addition, to handle to prevent that adjoining course with miscellaneous part from adhering to be that purpose is implemented in anti-adhesion.
In addition, non-glare treated is to prevent that because of external light hinders watching of polaroid transmitted light etc. in the polaroid surface reflection be that purpose is implemented.Asperities mode that for example can be by adopting sandblast mode or embossing processing mode or cooperate suitably mode such as transparent atomic mode is given the micro concavo-convex structure to the surface of transparent protective film and is formed.As the particulate that in forming above-mentioned surperficial micro concavo-convex structure, is contained, can use the mineral-type particulate that electric conductivity is arranged sometimes that for example contains silicon dioxide that mean grain size is 0.5～50 μ m, aluminium oxide, titania, zirconia, tin oxide, indium oxide, cadmium oxide, antimony oxide etc., contain the transparent particulate of organic based fine particles (containing pearl) etc. of crosslinked or uncrosslinked polymkeric substance etc.When forming surperficial micro concavo-convex structure, with respect to transparent resin 100 weight portions that form surperficial micro concavo-convex structure, atomic use amount is generally about 2～50 weight portions, preferred 5～25 weight portions.Antiglare layer can enlarge the material of the diffusion layer (vision expanded functionality etc.) of vision etc. with being used for the diffusion polarizing piece transmitted light.
Above-mentioned anti-reflection layer, anti-adhesive coating, diffusion layer and antiglare layer etc. except can being set directly at the transparent protective film, can also be provided with in the mode of separating with transparent protective film as other optical layers.
In addition, as blooming, can enumerate the blooming that becomes the optical layers of in the formation of liquid crystal indicator etc., using sometimes of reflecting plate for example or anti-transmittance plate, polarizer (comprise 1/2 and 1/4 etc. wavelength plate), vision compensate film, brightness enhancement film etc.They can use as blooming individually, in addition, can use more than 1 layer or 2 layers stacked on the above-mentioned polaroid when reality is used.
Preferred especially: as on polaroid, further to be laminated with reflection type polarizer or Semitransmissive polaroid that reflecting plate or Transflective plate form; On polaroid, further be laminated with ellipsoidal polarizing plate or circular polarizing disk that polarizer forms; On polaroid, further be laminated with the wide view angle polaroid that the vision compensate film forms; Perhaps on polaroid, further be laminated with the polaroid that brightness enhancement film forms.
Reflection type polarizer, on polaroid, be provided with the reflection horizon and obtain, be used to form and make such liquid crystal indicator of showing from the incident light reflection of watching side (demonstration side) etc., have light source such as dress backlight in can omitting and realize the advantage of liquid crystal indicator slimming etc. easily.The formation of reflection type polarizer can adopt the suitable modes such as mode of setting up the reflection horizon of containing metal etc. in the one side of polaroid by protective clear layer etc. that are situated between as required to carry out.
As the object lesson of reflection type polarizer, can enumerate in the one side of having carried out the transparent protective film that liner handles as required and set up polaroid that the paper tinsel that contains reflective metal such as aluminium or vapor-deposited film form the reflection horizon etc.In addition, can also enumerate and particulate is contained in the above-mentioned transparent protective film form surperficial micro concavo-convex structure, and have the polaroid etc. in the reflection horizon of micro concavo-convex structure thereon.The reflection horizon of above-mentioned micro concavo-convex structure makes incident light diffusion by diffuse reflection, prevents tropism or twinkling outward appearance, has the advantage that can suppress the light and shade spot etc.In addition, incident light and reflected light thereof pass when containing atomic diaphragm and are spread, thereby contain atomic diaphragm and also have advantage that can further suppress the light and shade spot etc.Reflect the formation in reflection horizon of micro concavo-convex structure of the surperficial micro concavo-convex structure of transparent protective film; for example can pass through in suitable modes such as vacuum evaporation mode, ion plating mode, sputter mode and plating modes, the method for directly setting up metal on the surface of protective clear layer waits to be implemented.
For reflecting plate, substitute above-mentioned mode of it directly being given at the transparent protective film of polaroid, also can be used as and the uses such as reflector plate that the reflection horizon forms are set on suitable film corresponding to this hyaline membrane.Metal is contained in the reflection horizon usually; thereby reduce and then keep the initial stage reflectivity for a long time, avoid setting up in addition the angle of protective seam etc. because of the reflectivity due to the oxidation from preventing, more preferably this reflecting surface is with the use-pattern of the state of linings such as transparent protective film or polaroid.
The Semitransmissive polaroid can above-mentioned obtain the reflection horizon of the Semitransmissives such as half-mirror of light reflection and transmission in the reflection horizon by making.The Semitransmissive polaroid is arranged on the inboard of liquid crystal cells usually, when under bright relatively environment, using liquid crystal indicator etc., make from the incident light of watching side (demonstration side) and reflect display image, under darker environment, can form the liquid crystal indicator etc. that internal electric sources such as backlight that use is equipped with come the type of display image in the rear side of Semitransmissive polaroid.Promptly, the Semitransmissive polaroid can be used to form the liquid crystal indicator of following type etc.: under bright environment, can the save on backlight source etc. the energy that uses of light source, even under darker environment the also liquid crystal indicator etc. of operable type of use internal electric source.
Ellipsoidal polarizing plate or circular polarizing disk that further laminated phase-difference plate on polaroid is formed describe.Rectilinearly polarized light is become elliptically polarized light or circularly polarized light, or elliptically polarized light or circularly polarized light are become rectilinearly polarized light, when perhaps changing the polarization direction of rectilinearly polarized light, can use polarizer etc.Particularly, as rectilinearly polarized light is become circularly polarized light, or circularly polarized light become the polarizer of rectilinearly polarized light, use so-called 1/4 wavelength plate (being also referred to as λ/4 plates).1/2 wavelength plate (being also referred to as λ/2 plates) uses when changing the polarization direction of rectilinearly polarized light usually.
Ellipsoidal polarizing plate compensation (preventing) can be used for the above-mentioned situation that does not have painted white and black displays etc. effectively by painted (blue or yellow) of the double refraction generation of the liquid crystal layer of super twisted nematic (STN) type liquid crystal indicator.And then the polaroid of having controlled three-dimensional refractive index also can compensate painted that (preventing) produces when tilted direction is seen the picture of liquid crystal indicator, thereby preferred.Circular polarizing disk can be used for for example adjusting the situation etc. of picture tone of the reflection-type liquid-crystal display device of color display image effectively, in addition, also has the function of reflecting of preventing.
As polarizer, can enumerate with the macromolecule starting material carry out double refraction film that single shaft or Biaxially stretched processing form, liquid crystal polymer oriented film, support the oriented layer of liquid crystal polymer and the material that obtains etc. with film.There is no particular limitation for the thickness of polarizer, is generally about 20～150 μ m.
As macromolecular material, can exemplify out polyvinyl alcohol (PVA), polyvinyl butyral, poly-ethylene methacrylic ether, Poly(Hydroxyethyl Methacrylate), hydroxyethyl cellulose, hydroxypropyl cellulose, methylcellulose, polycarbonate, polyarylate, polysulfones, polyethylene terephthalate, PEN, polyethersulfone, polyphenylene sulfide, polyphenylene oxide, polyene propyl group sulfone, polyamide, polyimide, polyolefin, Polyvinylchloride, cellulosic polymer, norbornene resin or their two metaclass, the various multipolymers of three metaclass, graft copolymer, potpourri etc.These macromolecule starting material are made directed thing (stretched film) by stretching etc.
As liquid crystal polymer, can exemplify out main chain or the backbone chain type of side chain or the various liquid crystal polymers of side chain type etc. that the linearity atomic group (liquid crystal unit (mesogen)) that will give the conjugacy of liquid crystal aligning imports to polymkeric substance.As the object lesson of the liquid crystal polymer of backbone chain type, can enumerate the structure that is combined with liquid crystal unit in the spacer portion of giving bendability, for example to row direction-sense polyesters liquid-crystalline polymer, discoid polymkeric substance or cholesteric polymkeric substance etc.Object lesson as the liquid crystal polymer of side chain type, can enumerate polysiloxane, polyacrylate, polymethacrylate or poly-malonate as main chain backbone, have the material of liquid crystal unit portion as side chain, described liquid crystal unit Jie of portion is contained the para-oriented ring shape compound unit of directed the giving property of oriented row by the spacer portion that contains the conjugacy atomic group.These liquid crystal polymers can be handled in the following way: for example, friction treatment is carried out on the surface of films such as polyimide that forms on glass plate or polyvinyl alcohol (PVA) and on the directional process face of the material that obtains, oblique evaporation monox and material of obtaining etc., developping solution crystallinity polymer solution is heat-treated.
Polarizer, for example can be the polarizer that has suitable phase differential according to the application target with the material that is compensated for as purpose of the painted or vision due to the double refraction of various wavelength plates or liquid crystal layer etc. etc., also can be the polarizer etc. of stacked polarizer more than the 2 kinds optical characteristics of coming control phase difference etc.
In addition, above-mentioned ellipsoidal polarizing plate or reflection-type ellipsoidal polarizing plate, polaroid or reflection type polarizer and polarizer carry out stacked obtaining with suitable combination.Described ellipsoidal polarizing plate etc., can be by mode with (reflection-type) polaroid and polarizer combination, in the manufacture process of liquid crystal indicator stacked one by one in turn they form, but as previously mentioned, make the material of bloomings such as ellipsoidal polarizing plate in advance, have excellences such as quality stability and stacked operation, can improve the advantage of the manufacturing efficient of liquid crystal indicator etc.
As the vision compensate film,, also can see the film comparison harsh image, that be used to broaden one's vision the angle even be not to be perpendicular to picture but the slightly-inclined direction that is omitted when seeing the picture of liquid crystal indicator.As such vision compensation of phase difference plate, comprise the oriented film of for example polarizer, liquid crystal polymer etc. or on transparent base, support the material etc. of the oriented layer of liquid crystal polymer etc.Common polarizer, use is stretched, has birefracting polymer film in its face direction by single shaft, relative therewith, polarizer as the use of vision compensate film, use the face direction by Biaxially stretched, have birefracting polymer film, perhaps use the face direction by single shaft stretch, thickness direction also is stretched and controlled thickness direction refractive index have two such direction stretched film of birefracting polymkeric substance or inclined orientation film etc.As the inclined orientation film, can exemplify out under the effect of the convergent force that after heat shrink films is bonded in polymer film, produces because of heating, polymer film is carried out stretch processing or/and shrink process and the material that obtains, and oblique directional crystal polymkeric substance and the material that obtains etc.The starting material raw polymer of polarizer can use with polarizer the preceding in the same material of polymkeric substance that illustrates, can use to prevent because the angle of visibility that the painted grade that the variation of watching the angle of the phase differential due to liquid crystal cells causes or enlarge is well watched etc. are the material that suits of purpose.
In addition; from the angle of wide view angle of realizing well watching etc., can preferably use with the tri acetyl cellulose support and contain the optical anisotropic layer of inclined orientation layer of the oriented layer of liquid crystal polymer, particularly discoid liquid crystal polymer and the optical compensation polarizer that obtains.
The polaroid that brightness enhancement film and polaroid is fitted and obtain is arranged on the inboard of liquid crystal cells usually and uses.Brightness enhancement film, backlight by liquid crystal indicator etc. or from reflection of inboard etc., when natural light incident, demonstrate the circularly polarized light of the rectilinearly polarized light of reflection regulation polarization axle or prescribed direction and other light transmissive characteristics, therefore, brightness enhancement film and polaroid is the stacked and polaroid that obtains, make light incident, obtain the transmitted light of regulation polarization state, and make the not transmission of light beyond the afore mentioned rules polarization state but be reflected from light sources such as backlights.The reflection horizon that further Jie of light of reflecting at this brightness enhancement film face is provided with by its rear side etc. makes its counter-rotating, incide in the brightness enhancement film once more, part or all light as the regulation polarization state makes its transmission with it, realize the increase of the light quantity of transmission brightness enhancement film, and supply with the polarized light that is difficult to absorb polarizer, the increase of the light quantity that realization can utilize in liquid crystal display image demonstration etc., thus brightness can be improved.That is, do not use brightness enhancement film, with backlight etc. from the inboard of liquid crystal cells by polarizer during with light incident, have the light with the inconsistent polarization direction of polarization axle of polarizer, nearly all be absorbed in the polarizer, can't the transmission polarizer.That is, though according to the characteristic of the polarizer that uses and different, about 50% light is absorbed in the polarizer, therefore, the light quantity that can be used for liquid crystal image demonstration etc. reduces the image deepening.Brightness enhancement film makes to have and can not incided in the polarizer by the light that polarizer absorbs such polarization direction, and at brightness enhancement film by primary event, and then be situated between and make its counter-rotating and incide brightness enhancement film once more by the reflection horizon that is arranged at its rear side etc., so repeatedly, brightness enhancement film only makes in reflection between the two, the polarized light transmission that the polarisation of light direction of counter-rotating becomes polarization direction that can be by polarizer supplies in the polarizer, therefore, the image that the light of backlight etc. can be used for efficiently liquid crystal indicator shows, can make image become bright.
Between brightness enhancement film and the above-mentioned reflection horizon etc. diffuser plate can also be set.The light of the polarized light state that reflects by brightness enhancement film is towards above-mentioned reflection horizon etc., but the diffuser plate that is provided with is removed polarization state in the light that evenly diffuses through, become unpolarized state.That is, the light orientating reflex layer of natural light state etc. are situated between and are reflected by reflection horizon etc., incide brightness enhancement film by diffuser plate once more, so repeatedly.So, between brightness enhancement film and above-mentioned reflection horizon etc., the diffuser plate that polarized light is reverted to original natural light is set, can keeps the lightness of display frame thus, reduce the spot of the lightness of display frame simultaneously, the picture of homogeneous and bright can be provided.Think that the number of occurrence of first incident light reflection suitably increases by described diffuser plate is set, the diffusion function interaction with diffuser plate can provide the display frame of homogeneous and bright.
As above-mentioned brightness enhancement film, for example can use: as the multi-layer laminate of the different film of the multilayer film of dielectric or refractive index anisotropy, demonstrate and can see through the rectilinearly polarized light of regulation polarization axle and reflect the brightness enhancement film of the characteristic of other light; The appropriate brightness reinforcing membrane such as brightness enhancement film of the characteristic of any circularly polarized light as the material of the oriented film of on film base material, supporting cholesteric liquid crystal polymers or its oriented liquid crystal layer, that demonstrate the left-handed or dextrorotation of reflection and other light of transmission.
Therefore, for the brightness enhancement film of the type of the above-mentioned rectilinearly polarized light transmission that makes the regulation polarization axle, by adjusting the polarization axle unanimity, making this transmitted light be directly incident on polaroid, can suppress the absorption loss due to the polaroid, and make its transmission efficiently.On the other hand, for the brightness enhancement film of the type of transmission circularly polarized light as the cholesteric liquid crystal layers, can make it be directly incident on polarizer, but from suppressing the angle of absorption loss, preferred Jie make it incide polaroid this circularly polarized light straight line polarization by polarizer.At this,, circularly polarized light can be transformed into rectilinearly polarized light by using 1/4 wavelength plate as this polarizer.
The polarizer that plays a role as 1/4 wavelength plate under the wide wavelength of visible region etc. can wait to obtain: will be for example carry out overlapping for the light light of wavelength 550nm as polarizer and the phase separation layer that shows other phase difference characteristics, the phase separation layer that for example plays a role as 1/2 wavelength plate that 1/4 wavelength plate plays a role in the following way.Therefore, the polarizer that disposes between polaroid and brightness enhancement film can contain the phase separation layer more than 1 layer or 2 layers.
With regard to cholesteric liquid crystal layers, make overlapping configuration structure more than 2 layers or 3 layers by the different material of combined reflected wavelength, the material of the wide wavelength coverage internal reflection circularly polarized light that can obtain in the visible region etc. can obtain the transmission circularly polarized light of wide wavelength coverage on this basis.
In addition, as above-mentioned polarized light divergence type polaroid, polaroid can comprise and the stacked material that optical layers more than 2 layers or 3 layers is arranged and obtain of polaroid.Therefore, also can be that above-mentioned reflection type polarizer or Semitransmissive polaroid and polarizer make up and the reflection-type ellipsoidal polarizing plate that obtains or Semitransmissive ellipsoidal polarizing plate etc.
The blooming of stacked above-mentioned optical layers on polaroid, can be by in the manufacture process of liquid crystal indicator etc., forming in stacked one by one in turn mode, but the stacked in advance material of making blooming has the advantage of the manufacturing process that can improve liquid crystal indicator etc. in aspect excellences such as quality stability or assembly operations.Stackedly can use suitable adhesive means such as bonding coat.With the optical layers bonding of above-mentioned polaroid and other time, can be according to their optic axis being made as suitable arrangement angles as the phase difference characteristics of purpose etc.
Then, the manufacture method to charge-preventing optical film, antistatic adhesive optical film describes.
Coating contains the coating fluid of metal oxide, water wettability imparting agent, adhesive component etc. on above-mentioned blooming 1, forms antistatic backing 2.The concentration of the solid constituent of coating fluid is preferably adjusted to about 0.5～5 weight %.Be coated with coating processing methods such as method, fountain type coating (fountain coating) method, dip coating, spraying process with rolling methods such as reverse coating, intaglio plate coating, spin-coating method, silk screen, this coating fluid is applied on the blooming 1, dry back forms antistatic backing 2.
The thickness of antistatic backing is preferably 5～1000nm.Consider from the angle that optical characteristics reduces, usually the thickness with antistatic backing is made as below the 5000nm, still, and when the thickness thickening of antistatic backing, in antistatic backing, cause damage easily owing to the undercapacity of antistatic backing, can not get sufficient adhering situation.Below the preferred 500nm of the thickness of antistatic agent, more preferably below the 300nm, below the further preferred 200nm.From the angle consideration of guaranteeing adhesiveness, suppressing to peel off static, more than the preferred 5nm, more than the further preferred 10nm.On the other hand, prevent to peel off electrostatic efficiency with antistatic backing thick serve as preferred, but surpass 200nm then effect reduce or on an equal basis.Thus, preferred 5～500nm, more preferably 10～300nm, further preferred 10～200nm.
When forming antistatic backing 2, can apply activate to blooming 1 and handle.Activate is handled can adopt the whole bag of tricks, for example can adopt corona treatment, low pressure UV processing, Cement Composite Treated by Plasma etc.Activate handle aqueous solution that use contains the water-soluble conducting polymkeric substance as the situation of antistatic agent under effectively, the shrinkage cavity in the time of can suppressing to be coated with this aqueous solution.It is effective under the situation of polyolefin resin, norbornene resin that activate is handled particularly at blooming 1.
The formation of adhesive phase 3 is by carrying out stacked enforcement on above-mentioned antistatic backing 2.The formation method is not particularly limited, and can enumerate the dry method of the laggard row of coat binding agent solution on antistatic backing, carries out the method for transfer printing etc. by the release sheet that is provided with adhesive phase.The thickness of adhesive phase is not particularly limited, but about preferred 10～40 μ m.
As the constituent material of release sheet, can enumerate suitable thin slice body such as synthetic resin films such as paper, tygon, polypropylene, polyethylene terephthalate, sheet rubber, paper, cloth, nonwoven fabrics, net, foaming sheet, metal forming, their layered product etc. etc.In order to improve the fissility of peeling off from adhesive phase 3, can carry out the low close-burning lift-off processing of silicone-treated, chain alkyl processing, fluorine processing etc. as required to the surface of release sheet.
For each layer of the blooming of charge-preventing optical film of the present invention or adhesive phase etc., can be by the mode handled with ultraviolet light absorbers such as salicylate compounds for example or phenylamino benzoic acid ester type compound, benzotriazole compound, cyanoacrylate compound, nickel complex salt compounds etc., make it have UV absorbing properties etc.
The adhesion of antistatic backing 2 and adhesive phase 3 is measured with 180 ° of peel angle and peeling rate 300mm/min, is preferably more than the 10N/25mm, more than the further preferred 15N/25mm.Adhesion is during less than 10N/25mm, and blooming might produce paste when liquid crystal display is peeled off residual, or occur peeling off under the warming and humidifying thermal environment.
Charge-preventing optical film of the present invention, antistatic adhesive optical film can be preferred for the formation of various image display devices such as liquid crystal indicator etc.The formation of liquid crystal indicator can be carried out according to standard in the past.That is, liquid crystal indicator generally forms in the following way: with the component parts appropriate combination of liquid crystal cells and antistatic adhesive optical film and illuminator as required etc., be assembled into and drive loop etc.Except using blooming this point of the present invention, be not particularly limited in the present invention, can be according to standard in the past.For liquid crystal cells, for example can use the liquid crystal cells of TN type or any types such as STN type, π type.
The one or both sides that can be formed on liquid crystal cells dispose the liquid crystal indicator of antistatic adhesive optical film or use the suitable liquid crystal indicator of the material etc. of backlight or reflecting plate in illuminators.At this moment, blooming of the present invention can be arranged on the one or both sides of liquid crystal cells.When both sides were provided with blooming, they can be identical materials, also can be different materials.And then, when forming liquid crystal indicator, for example, suitable parts such as diffuser plate, antiglare layer, anti-reflection layer, fender, prism array, lens array sheet, light diffusing sheet, backlight can be disposed more than 1 layer or 2 layers in position.
Then, Organnic electroluminescent device (organic EL display) is described.Blooming of the present invention (polaroid etc.) also goes in the organic EL display.Generally speaking, organic EL display, stacked above one another transparency electrode and organic luminous layer and metal electrode on transparency carrier and form luminophor (organic electroluminescent body).Known at this: organic luminous layer is the duplexer of various organic films, for example contain the hole injection layer of triphenylamine derivative etc. and contain the duplexer of the luminescent layer of fluorescence organic solid such as anthracene, the duplexer of the electron injecting layer of perhaps such luminescent layer and Han You perylene derivant etc., perhaps duplexer of these hole injection layers, luminescent layer and electron injecting layer etc. has the formation of various combinations.
Organic EL display is based on following principle and carries out luminous: by transparency electrode and metal electrode are applied voltage, hole and electronics are injected in the organic luminous layer, by these holes and electronics again in conjunction with the energy excitation fluorescent material that generates, the radiating light when fluorescent material that is excited turns back to ground state.The mechanism of combination is identical with general diode again in the way, and also can envision thus: electric current and luminous intensity demonstrate applying the strong non-linear property of voltage with rectification.
In organic EL display, in order to take out luminous at organic luminous layer, at least one side's electrode must be transparent, and the transparency electrode of using the transparent conductive body formation that waits with tin indium oxide (ITO) usually is as anode.On the other hand, in order to inject electronics easily, to improve luminescence efficiency, it is important using the little material of work function at negative electrode, uses metal electrodes such as Mg-Ag, Al-Li usually.
In the organic EL display of such formation, organic luminous layer is to be as thin as a wafer film formed about 10nm with thickness.Thus, organic luminous layer is also the same with transparency electrode, and light is transmission almost completely.Its result is, when not luminous from surperficial incident, transmission transparency electrode and the organic luminous layer of transparency carrier and at the light of metal electrode reflection, owing to penetrate to the face side of transparency carrier once more, thereby when the outside was watched, the display surface of organic EL display was looked as minute surface.
In containing the organic EL display of organic electroluminescent body, can polaroid be set in the face side of transparency electrode, and, can between these transparency electrodes and polaroid polarizer be set, described organic electroluminescent body is that the face side at the organic luminous layer luminous by applying voltage has transparency electrode and has metal electrode in the inner face side of organic luminous layer and forms.
Polarizer and polaroid are owing to have with carrying out the effect of polarization from outside incident and at the light of metal electrode reflection, therefore owing to this polarization has the effect that can not see the minute surface of metal electrode from the outside.Particularly,, and the angle that the polarization direction became of polaroid and polarizer is adjusted into π/4, then can covers the minute surface of metal electrode fully if constitute polarizer with 1/4 wavelength plate.
That is, incide the exterior light of this organic EL display, by a polaroid transmission rectilinearly polarized light composition.This rectilinearly polarized light generally becomes elliptically polarized light by polarizer, and particularly, polarizer is 1/4 wavelength plate and polaroid with the angle that the polarization direction became of polarizer is π/4 o'clock, becomes circularly polarized light.
This circularly polarized light transmission transparency carrier, transparency electrode, organic film, in the metal electrode reflection, transmission organic film, transparency electrode, transparency carrier become rectilinearly polarized light once more at polarizer again.So this rectilinearly polarized light is vertical with the polarization direction of polaroid, thereby can not the transmission-polarizing sheet.Its result is to cover the minute surface of metal electrode fully.
Embodiment
Below, specify the present invention by embodiment, but the present invention is not limited to these embodiment.Part and % in each example are benchmark with weight.
(making of polaroid)
Be the polyvinyl alcohol film of 80 μ m is stretched to 5 times in 40 ℃ iodine aqueous solution after with thickness, 50 ℃ dry 4 minutes down, obtain polarizer.Use polyvinyl alcohol adhesives tri acetyl cellulose film in the both sides of this polarizer, obtain polaroid.
Embodiment 1
(formation of antistatic backing)
Mix following substances and modulate coating fluid: the micro-dispersed liquid of tin oxide (industry in the mountain (strain) system, EPS-6, tin oxide content 6%) 100 parts, 1.5 parts of cataloids (Misao Kusano's system, SNOWTEX N, solid component concentration 20%, particle diameter 10～20nm, pH9～10).This coating fluid is coated the one side of above-mentioned polaroid, make that dried thickness is 200nm,, form antistatic backing (tin oxide: silicon dioxide=100: 5) 80 ℃ of following heat dryings 2 minutes.
(formation of adhesive phase)
0.1 part of 100 parts of butyl acrylate, 5 parts in acrylic acid, acrylic acid 2-hydroxyl ethyl ester is dissolved in 300 parts in the ethyl acetate, under stirring condition, make its reaction 6 hours at about 60 ℃, obtain weight-average molecular weight and be 2,000,000 acrylic polymers, modulation contains the solution (solid constituent 24%) of this acrylic polymers as base polymer.With respect to 100 parts of polymer solids compositions, in aforesaid propylene acids polymer solution, add 3.2 parts of CORONATE L, 0.6 part of adjuvant (SHINETSU SILICONE corporate system, KBM-403) and ethyl acetate (solvent) of making as isocyanates multi-functional compounds's NIPPON POLYURETHANE company, modulating adhesive solution (solid constituent 11%).This binder solution is coated on the release sheet (manufacturing of MITSUBISHI POLYESTER company, DIAFOILMRF38, polyethylene terephthalate base material) with contrary roller rubbing method, make that its dried thickness is 25 μ m, further give release sheet then thereon, and carry out drying with the heated air circulation type baking oven, form adhesive phase.
(making of antistatic adhesive optical film)
On the antistatic backing of above-mentioned static electricity resistance polaroid, the bonding demoulding sheet that is formed with adhesive phase, thus make antistatic adhering type polaroid.
Embodiment 2
Except in the formation of the antistatic backing of embodiment 1, the addition of cataloid is changed to beyond 30 parts, make antistatic adhering type polaroid (tin oxide: silicon dioxide=100: 100) by method similarly to Example 1.
Embodiment 3
Except in the formation of the antistatic backing of embodiment 1, beyond the micro-dispersed liquid of the micro-dispersed liquid of use tin oxide and 100 parts of alternative tin oxide of mixed solution (industry in the mountain (strain) system, ESP-6H001, solid constituent were than 1: 1) of polyurethane tackifier, make antistatic adhering type polaroid by method similarly to Example 1.
Embodiment 4
Except in embodiment 1, use the polarizer that norbornene resin (JSR corporate system, ARTON) uniaxial tension is formed to substitute beyond the polaroid, make antistatic adhering type polaroid by method similarly to Example 1.Then, at the exterior side in addition of this antistatic adhering type polarizer, the adhesive phase of applying adhesion type polaroid (day eastern electrician's corporate system, SEG5425DU) is made antistatic adhering type ellipsoidal polarizing plate.
Embodiment 5
(formation of antistatic backing)
Mix following substances and modulate coating fluid: 100 parts of the micro-dispersed liquids of tin oxide (industry in the mountain (strain) system, EPS-6, tin oxide content 6%), 15 parts of polyacrylic acid solution (Nihon Junyaku Co., Ltd.'s system, JURYMER, solid component concentration 20%).This coating fluid is coated the one side of above-mentioned polaroid, make that dried thickness is 200nm,, form antistatic backing (tin oxide: polyacrylic acid=100: 50) 80 ℃ of following heat dryings 2 minutes.
(making of antistatic adhesive optical film)
Except using above-mentioned static electricity resistance polaroid, make antistatic adhering type polaroid with method similarly to Example 1.
Comparative example 1
Except in the formation of the antistatic backing of embodiment 1, do not use beyond the cataloid, make antistatic adhering type polaroid with method similarly to Example 1.
Comparative example 2
Except in embodiment 1, beyond the electrostatic layer in the air, make the adhesion type polaroid by method similarly to Example 1.
Carry out following evaluation for the antistatic adhesive optical film that in embodiment and comparative example, obtains.Evaluation result is shown in Table 1.
[anti-static effect]
The antistatic adhesive optical film of making is cut into 100mm * 100mm size, attaches to liquid crystal display.This screen is placed on the backlight with 10000cd brightness, and (SANKI company makes, and ESD-8012A) produces the static of 5kv, thereby it is directed chaotic that liquid crystal is produced with electrostatic generator ESD.(big tomb electronics corporation makes, and MCPD-3000) measures the bad demonstration that causes of this orientation bad release time (second) with instantaneous multi-functional photometry detecting device.In addition, this screen is placed on 50 ℃ environment after following 500 hours, measures release time (second) with above-mentioned same method.
[light transmission]
Measure the light transmission of the antistatic adhesive optical film of made with integrating sphere type spectral transmission analyzer (Murakami K. K.'s dye technology institute system, DOT-3).
[table 1]
| Light transmission (%) | Show bad release time (s) | ||
| Before the heating | After the heating | ||
| Embodiment 1 | 43.3 | ＜1 | 3 |
| Embodiment 2 | 43.0 | ＜1 | ＜1 |
| Embodiment 3 | 43.1 | ＜1 | 6 |
| Embodiment 4 | 42.8 | ＜1 | 10 |
| Embodiment 5 | 43.3 | ＜1 | 5 |
| Comparative example 1 | 43.4 | ＜1 | ＞600 |
| Comparative example 2 | 43.7 | ＞600 | - |
Claims (6)
1. charge-preventing optical film, its at least one face at blooming is laminated with antistatic backing, it is characterized in that, and described antistatic backing contains metal oxide and water wettability imparting agent.
2. charge-preventing optical film according to claim 1 is characterized in that, described metal oxide is the tin oxide class.
3. charge-preventing optical film according to claim 1 is characterized in that, described water wettability imparting agent is the water wettability silicon dioxide particles.
4. an antistatic adhesive optical film is characterized in that, is laminated with adhesive phase on the antistatic backing of the described charge-preventing optical film of claim 1.
5. antistatic adhesive optical film according to claim 4 is characterized in that described adhesive phase is formed by acrylic adhesives.
6. an image display device is characterized in that, uses each described charge-preventing optical film or claim 4 or the described antistatic adhesive optical film of claim 5 in 1 claim 1～3 at least.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2004306966A JP2006119353A (en) | 2004-10-21 | 2004-10-21 | Antistatic optical film, antistatic adhesive optical film and image display device |
| JP306966/2004 | 2004-10-21 |
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| CN101040199A true CN101040199A (en) | 2007-09-19 |
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| JP (1) | JP2006119353A (en) |
| KR (1) | KR20070044074A (en) |
| CN (1) | CN100478712C (en) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713840A (en) * | 2008-09-30 | 2010-05-26 | 住友化学株式会社 | Polarizing plate, liquid crystal panel and liquid crystal display |
| CN101487911B (en) * | 2007-12-04 | 2012-07-04 | 住友化学株式会社 | A polarizer and a liquid crystal display apparatus |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100803782B1 (en) * | 2006-09-28 | 2008-02-15 | 율촌화학 주식회사 | Surface protective film |
| JP5133549B2 (en) * | 2006-10-05 | 2013-01-30 | 住友化学株式会社 | Liquid crystal display |
| JP5176571B2 (en) * | 2008-02-05 | 2013-04-03 | 東亞合成株式会社 | Adhesive composition |
| JP2013130593A (en) * | 2010-04-05 | 2013-07-04 | Sketch:Kk | Coating liquid, and substrate |
| JP2013080067A (en) * | 2011-10-03 | 2013-05-02 | Sketch:Kk | Coating liquid and substrate |
| CN103589351B (en) * | 2012-08-16 | 2015-09-30 | 深圳市摩码科技有限公司 | A kind of Anti-static self-exhaust protection adhesive tape and preparation method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07333434A (en) * | 1994-06-09 | 1995-12-22 | Fuji Photo Film Co Ltd | Optical compensating sheet and liquid crystal display device using same |
| JPH1191038A (en) * | 1997-07-24 | 1999-04-06 | Sumitomo Chem Co Ltd | Antistatic plate |
| US6800378B2 (en) * | 1998-02-19 | 2004-10-05 | 3M Innovative Properties Company | Antireflection films for use with displays |
| US6791649B1 (en) * | 1999-09-28 | 2004-09-14 | Fuji Photo Film Co., Ltd. | Anti-reflection film, polarizing plate comprising the same, and image display device using the anti-reflection film or the polarizing plate |
| JP4802409B2 (en) * | 2000-07-21 | 2011-10-26 | コニカミノルタホールディングス株式会社 | Optical compensation film, polarizing plate and liquid crystal display device using the same |
-
2004
- 2004-10-21 JP JP2004306966A patent/JP2006119353A/en active Pending
-
2005
- 2005-10-12 KR KR1020077008139A patent/KR20070044074A/en not_active Application Discontinuation
- 2005-10-12 CN CNB2005800345415A patent/CN100478712C/en active Active
- 2005-10-12 WO PCT/JP2005/018766 patent/WO2006043450A1/en active Application Filing
- 2005-10-20 TW TW094136761A patent/TWI411810B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487911B (en) * | 2007-12-04 | 2012-07-04 | 住友化学株式会社 | A polarizer and a liquid crystal display apparatus |
| CN101713840A (en) * | 2008-09-30 | 2010-05-26 | 住友化学株式会社 | Polarizing plate, liquid crystal panel and liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006119353A (en) | 2006-05-11 |
| CN100478712C (en) | 2009-04-15 |
| KR20070044074A (en) | 2007-04-26 |
| TWI411810B (en) | 2013-10-11 |
| TW200628831A (en) | 2006-08-16 |
| WO2006043450A1 (en) | 2006-04-27 |
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