TW200838964A - Pressure-sensitive adhesive optical film and image display - Google Patents

Abstract

A pressure-sensitive adhesive optical film of the present invention comprises: an optical film comprising a transparent base film and a discotic liquid crystal layer on one side of the transparent base film; and a pressure-sensitive adhesive layer that is provided on the discotic liquid crystal layer, wherein the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive containing an acrylic polymer comprising an alkyl(meth)acrylate (a1) and a ring structure-containing (meth)acrylate (a2) as monomer units and having a weight average molecular weight of 1,000,000 to 3,000,000, and a crosslinking agent. The pressure-sensitive adhesive optical film has durability and can be prevented from causing display unevenness in a peripheral portion of a display screen.

Description

200838964 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to an adhesive optical film. Further, the present invention relates to an image display device such as a liquid crystal display device, an organic EL display device, a CRT or a PDP using the adhesive optical film. The adhesive optical film of the present invention has a discotic liquid crystal layer and can be used as an optical compensation film for improving the viewing contrast and viewing angle characteristics of a display color, and in particular, the adhesive optical film of the present invention in which a polarizing element is laminated can be used as an optical lens. An elliptically polarizing plate with compensation function. [Prior Art] Liquid crystal display devices such as clocks, mobile phones, PDAs, notebook computers, personal computer monitors, DVD players, and Tvs are rapidly expanding in the market. A liquid crystal display device is a device that visualizes a change in a polarization state by using a liquid crystal switch (swhching), and it is necessary to use a polarizing element in view of its display principle. Especially in applications such as TV, there is a growing need for high brightness and contrast display, and for polarizing elements, polarizing elements with brighter (high transmittance) and higher contrast (high degree of polarization) have been developed and introduced. . The mainstream method of the conventional liquid crystal display device is a TFT-LCD using TN liquid crystal. This method has the advantages of fast response, high contrast, and the like. However, when the display using the panel of 1^^ liquid crystal is observed from the angle inclined to the normal direction, the contrast is remarkably lowered, and the gradation reversal of the gradation display reversal occurs, so that the viewing angle of the liquid crystal is very narrow. Characteristics. On the other hand, in applications such as large-sized pc monitors or televisions, 127421.doc 200838964 is required, such as a contrast, a wide angle of view, and a small change in display color due to the angle of view. Therefore, when the TN mode TFT-LCD is used for the above-mentioned use, a retardation film for compensating for the angle of view is indispensable. As the retardation film, a stretched birefringent polymer film has been conventionally used. Recently, instead of an optical compensation film composed of a stretched birefringent film, an optical compensation film having an optically anisotropic layer formed of liquid crystalline molecules on a transparent support has been proposed. Since liquid crystal molecules have a plurality of alignment modes, optical properties which are not obtained by the conventional stretched birefringent polymer film can be realized by using liquid crystal molecules. For example, a wide viewing angle compensation film (Full view fUm) manufactured by Fujifilm Co., Ltd., which uses a disk-shaped liquid crystal having a negative refractive index anisotropy, has been proposed as the retardation film for the viewing angle compensation. ^, Patent Document 2). In the retardation film, a disk-shaped liquid crystal layer whose optical axis is obliquely aligned is provided on one surface of the transparent substrate film. The purpose of this phase difference is mainly to improve the viewing angle characteristics in the voltage application state of the black display. Namely, in the voltage application state, the liquid crystal molecules in the liquid crystal cell exhibit positive refractive index anisotropy with an inclination of the substrate: the optical axis of the substrate. In order to compensate for the phase difference caused by the long-distance anisotropy of the refractive index, a liquid crystal molecule having a negative refractive index anisotropy in which the optical axis is inclined in the film normal direction is used in the retardation film. In the phase difference 臈 for the above-mentioned viewing angle compensation, a polarizing plate is used as a elliptically polarizing plate in a transparent base (4), and an adhesive layer is formed in the other layer. The adhesive type optical film such as the adhesive liquid-like layer is laminated on the liquid crystal cell or the like by the (4) retardation film or the ellipsoidal layer by the adhesive layer.欣欣早127421.doc 200838964 As an adhesive used in the above optical enamel with an adhesive, in order to make it excellent in adhesion, transparency, etc., acrylic acid using an acrylic polymer as a matrix polymer is generally used. Adhesive. Further, as for the crosslinking method of the acrylic acid-based adhesive, an isocyanate-based crosslinking agent is often used, and a crosslinking agent mainly bonded to a functional monomer copolymerized with an acrylic polymer is used. . The liquid crystal panel to which the optical film is bonded to the liquid enamel sheet 70 can be mounted and used in a liquid day display device. The liquid crystal display device is used in an electronic calculator or a television, a monitor, or the like. The liquid crystal display device is placed under heating or humidifying conditions, and the like, and the π i "' ding" condition, so that it is required to have high durability without damaging the display quality even in the above environment. However, when the liquid crystal display is placed under heating or humidification conditions, unevenness may occur in the peripheral portion of the liquid crystal panel, resulting in poor display. The peripheral portion is unevenly displayed, especially in use. In the case where the viewing angle is supplemented by a retardation film or an elliptically polarizing plate for 4 Å, it is apparent that the adhesive used in the optical film with an adhesive is used to improve the display unevenness of the peripheral portion. The adhesive composition of the agent or the oligomer component (refer to Patent Document 3 and the patent document). However, in the heating test for a long time, the additives themselves precipitated as an additive such as a plasticizer or a polymer component. The problem of poor appearance or deterioration of the adhesive is caused. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei 8-95-32 (Patent Document 2) Japanese Patent No. 2767382 [ Japanese Patent Application Laid-Open No. Hei 9-87593 No. 127421.doc No. 200838964 [Patent Document 4] Japanese Patent Laid-Open Publication No. Hei No. 279-907 [Invention] [Problems to be Solved by the Invention] An object of the present invention is to provide a On one surface of the transparent substrate film, a discotic liquid crystal layer in which a discotic liquid crystal compound has been aligned, and an adhesive optical film in which an adhesive layer is laminated on the disc-like liquid as layer, the adhesive optical film has durability Further, it is possible to suppress display unevenness in the peripheral portion of the display pupil. It is also an object of the present invention to provide an image display device using the above-described adhesive optical film. [Technical means for solving the problem] The present inventors have specifically solved The above-mentioned problems have been intensively studied, and as a result, it has been found that the above object can be attained by the following adhesive optical film to complete the present invention. That is, the present invention relates to an adhesive optical film which is provided on one side of a transparent substrate. An adhesive optical film having an adhesive layer disposed on the disc-shaped liquid crystal layer of the optical film of the discotic liquid crystal layer, wherein: the adhesive The agent layer is composed of an acrylic polymer and a binder containing a crosslinking agent, wherein the bismuth propionate polymer contains (meth)acrylic acid v-alkyl ester (al) and has a ring structure. (Methyl) acrylate (a2) as a monomer unit and having a weight average molecular weight of 1,000,000 to 3,000,000. The propionic acid polymer contains (meth) propyl in a ratio of 30 to 90% by weight. a dibasic acid ester (a 1 ), and a (meth) acrylate (a2) having a ring structure in a ratio of from 1 to 70% by weight as a monomer unit. 127421.doc 200838964 In the above adhesive optical film, The (meth)acrylic acid vinegar U2 having a ring structure is preferably a (fluorenyl) acrylate having an aromatic ring structure. In the acrylic polymer, as the monomer unit, in addition to the component (4)) and the component (a2), the monomer (a3) having a ratio of 1% by weight or less is contained in the above-mentioned adhesive optical film, and acrylic acid is used. The weight average molecular weight of the polymer is from 1,000,000 to 3,000,000, and the ratio of the molecular weight of 100,000 or less is 15% by area or less. In the above adhesive optical film, the adhesive preferably contains a decane coupling agent. In the above adhesive optical film, an adhesive layer is provided on the discotic liquid crystal layer via the undercoat layer. The undercoat layer is preferably formed by a polyethyleneimine-based material. In the above-mentioned adhesive optical film, as the optical film, an optical film having a polarizing element in one of the sides of the transparent base film which is not formed with the disk-shaped liquid crystal layer can be used. Further, the present invention relates to an image display device characterized by using the above-mentioned adhesive optical film. [Effects of the Invention] The adhesive optical film of the present invention has a disk-shaped liquid crystal layer functioning as an optical compensation layer, and acrylic acid is used as a matrix polymer for forming an adhesive of an adhesive layer provided on the disk-shaped liquid crystal layer. a polymer, wherein the alkenoic acid polymer comprises an alkyl (meth)acrylate (al) and a (meth) acrylate (a2) having a ring structure as a monomer component, and the weight average molecule is 127,421. Doc -10- 200838964 The quantity is 1 million to 3 million, which can suppress the display unevenness of the peripheral part of the display surface. In the adhesive optical film of the present invention, by using the above-mentioned component (a2) as a monomer unit of a matrix polymer which forms an adhesive for an adhesive layer, display unevenness in the peripheral portion can be suppressed, and therefore, in addition to the matrix polymer, An adhesive such as an additive such as a plasticizer is also used, and the appearance of the additive or the deterioration of the adhesive does not occur due to precipitation of the additive itself. [Embodiment] The present invention will be described below with reference to the drawings. As shown in Fig. 1, in the adhesive optical film of the present invention, a discotic liquid crystal layer 3 is provided on one surface of the transparent substrate film, and an adhesive layer 5 is provided on the discotic liquid crystal layer 3. In Fig. 1, the alignment film 2 is provided between the transparent substrate film 1 and the disc-shaped liquid crystal layer 3. However, instead of the alignment film 2, one surface of the transparent substrate film may be subjected to a rubbing treatment. Further, in Fig. 2, an adhesive optical film in which the adhesive layer 5 is provided via the undercoat layer 4 on the discotic liquid crystal layer 3 is also exemplified. Fig. 3 is a view showing a state in which the photosensitive substrate of Fig. 2 is used for a member of the transparent substrate film 未 which is not formed on the side of the disk-shaped liquid crystal layer 3, and the layered transparent protective film 7 is laminated. In Fig. 3, the transparent substrate film also serves as a transparent protective film for the polarizing element 6. Further, the aspect of Fig. 3 is also applicable to the adhesive type optical film of Fig. 1. As the transparent substrate film, various transparent materials can be used. For example, a polyester type polymer such as polyethylene terephthalate or polyethylene naphthalate; a cellulose polymer such as diethyl cellulose or triacetyl cellulose; Acrylic polymer such as polymethyl methacrylate; styrene polymer such as polystyrene or acrylonitrile-styrene copolymer (AS resin); polycarbonate 127421.doc 200838964 Lanthanide chelate. Further, examples of the polymer forming the transparent base film include, for example, polyethylene, polypropylene, a polyolefin having a cyclic or norbornene structure, and a polyolefin-based polymer such as an ethylene-propylene copolymer. a vinyl chloride polymer; a urethane polymer such as nylon or an aromatic polyamine; an imine polymer; a stone wind polymer; a polyether fluorene polymer; a polyether ether ether ketone polymer; Polyphenylene sulfide-based polymer; vinyl alcohol-based polymerization; chlorine-based vinyl chloride-based polymer; polyvinyl alcohol-condensed acid-based polymer; aryl-based I-based polymer; polyoxymethylene-based polymer; epoxy-based polymerization a mixture of the above-mentioned polymer or the like. Further, a polymer film disclosed in Japanese Patent Laid-Open Publication No. 2001-343529 (wo 01/37007), for example, contains (4) a thermoplastic resin having a substituted and/or substituted quinone imine group in a side chain, and (B) A resin composition having a substituted and/or substituted phenyl group and a base thermoplastic resin on a side chain. Specific examples thereof include a film containing an alternating copolymer composed of isobutylene and & methyl maleimide, and a resin composition of acrylamide. As the film, (iv) a film composed of a mixed extruded product of a resin composition or the like. . The thickness of the transparent base film can be appropriately determined, but it is generally about woo _ from the viewpoints of operation such as (four) degrees and handling properties, and thin layer properties. Especially good is 5~200 μπι. Further, the transparent substrate film is preferably a film which is as colored as possible. Therefore, it is preferred to use a film having Rth = (nx_nz).d (wherein the refractive index in the direction of the slow axis in the plane of the mesangial film, the refractive index in the thickness direction of the nz film, and the thickness of the d film) The phase difference in the thickness direction is _9〇nm~+75 protection 127421.doc 200838964 film. By using a film having a phase difference (Rth) in the thickness direction of _9 〇 ^(f) to + nm, the coloring (optical coloring) of the polarizing plate produced by the transparent substrate film can be substantially eliminated. The phase difference (Rth) in the thickness direction is further preferably _8 〇 nm to +60 nm Å, particularly preferably _7 〇 nm to +45 faces. The virgin lamp is a cellulose-based polymer such as triacetin cellulose or a norbornene-based polymer, from the viewpoint of the characteristics of the translucent base film or the long-term properties. Particularly preferred is a cellulose-based polymer such as triacetyl cellulose. The discotic liquid crystal layer is usually formed by alignment and curing of a discotic liquid crystal compound having a polymerizable unsaturated group. The discotic liquid crystal layer can be used as an optical compensation layer to improve the viewing angle, contrast, brightness, and the like. Preferably, the discotic liquid crystal layer has a tilted alignment of the discotic liquid crystal compound. The thickness of the discotic liquid crystal layer is usually about 0.5 to 10 μπι. The discotic liquid crystal compound is a liquid crystal compound having a negative refractive index anisotropy (unidirectional property), and examples thereof include those described in c. Destrade et al., Mol. Cryst, Vol. 71, in (1981). Benzene derivative or B,

Kohne's research report, cyclohexane derivatives described in Angew chem. 96, 70 (1984), and J. M. Lehn et al., j.

Chem· Commun·, 1794 (1985), J. Zhang et al., J. Am. Chem. Soc. 116, 2655 (1994), Aza Crown or The phenylene fast macrocycle (10) is replaced by a straight chain alkyl or alkoxy group, a substituted benzoic acid group, etc. as a straight chain, and is usually replaced by (7), etc. The structure is a liquid crystal compound which exhibits liquid crystallinity and is generally called a discotic liquid crystal. However, the liquid crystal 127421.doc 200838964 compound may be provided as long as the molecule itself has a negative unidirectional property, and is not limited to the above description. In the present invention, the discotic liquid crystal compound has a polymerizable unsaturated group which undergoes a curing reaction under conditions of heat, light, and the like (for example, an acrylonitrile group, a methacryl fluorenyl group, an ethyl fluorenyl group, an acryl group, etc.) Liquid crystal compound. Among them, the final product of the discotic liquid crystal layer is not necessarily the above-mentioned compound, and includes a substance which undergoes polymerization or cross-linking under the reaction of a polymerizable unsaturated group and is polymerized to lose liquid crystallinity.

Further, the discotic liquid crystal compound refers to a reaction product of a discotic liquid crystal which does not exhibit liquid crystallinity by reaction with various discotic liquid crystal compounds and other low molecular compounds or polymers, and the like All compounds that are optically negatively unidirectional. In the alignment treatment of the discotic liquid crystal, the surface of the transparent substrate film is subjected to a rubbing treatment or an alignment film is used. Examples of the alignment film include an inorganic oblique vapor deposition film or an alignment film obtained by rubbing a specific organic polymer film. Further, a film such as an LB film composed of an azobenzene derivative, which is isomerized by light, has a molecular orientation, and is uniformly arranged, is also included. The organic alignment film may be an organic high-eighth film which forms a hydrophobic surface such as a ruthenium imide film or a burn-chain-modified polyethylene glycol 1 ethyl galactitol or polymethyl methacrylate. Further, as the inorganic material is obliquely vaporized (four), (10) oblique = mineral film 0 W such as ruthenium used on the transparent substrate film (4), and then coated with a disk-shaped humanized liquid crystal compound) becomes a tilted alignment state. A method in which light such as a line is irradiated or heat is fixed. Moreover, it is also possible to obliquely align the discotic liquid crystal on the other alignment substrate of L. 127421.doc -14- 200838964, and then transfer it to the transparent support by using an optically transparent adhesive or a pressure sensitive adhesive. As the discotic liquid crystal layer, the discotic liquid crystal layer disclosed in Patent Documents 1 and 2 can be preferably used. A tilting alignment layer formed of such a discotic liquid crystal is formed on a cellulose-based polymer film, and a wide viewing angle compensation film manufactured by Fujifilm Co., Ltd. is used. As the material for forming the undercoat layer, it is preferred to form a material which exhibits good adhesion to any of the adhesive layer and the disc wire layer and has excellent cohesive force. As the material exhibiting such properties, various polymers, sols of metal oxides, cerium sols and the like can be used. Among them, it is particularly preferable to use a polymer. Examples of the polymer include a polyaminocarbamate-based resin, a polyacetal resin, and a polymer having an amine group in its molecule. The polymer may be used in any one of a solvent-soluble type, a water-dispersible type, and a water-soluble type. Examples φ are y, for example, water-soluble polyurethane, water-soluble polyester, water-soluble polyamine, or water-dispersible resin (ethylene-vinyl acetate emulsion, (meth)acrylic emulsion, etc.). Further, as the water-dispersible type, a product obtained by emulsification of various resins such as polyurethane, polyester, and polyamide, or an anion which introduces a water-dispersible hydrophilic group into the above-mentioned tree can be used. A product obtained by self-emulsification, a cationic group or a nonionic group. Further, an ionic polymer complex compound can also be used. In the case of the above-mentioned polymer, when the adhesive layer contains, for example, an oleic acid-based compound, it is preferred to have a functional group having a compound similar to that of the succinic acid-based compound I27421.doc •15·200838964. As the above polymer, a polymer having an amine group in its molecule is preferred. It is particularly preferable to use a polymer having a primary amino group at the terminal and firmly adhere to it by reaction with an isocyanate compound. Examples of the polymer having an amine group in the molecule include a polyethyleneimine system, a polyallylamine system, a polyvinylamine system, a polyethylene σ-pyridine system, and a polyvinylpyrrolidine-dimethylamino group. A polymer of an amine group-containing monomer such as a acrylate or the like. Among them, a polyethyleneimine system is preferred. The polyethyleneimine-based material may be a material having a polyethyleneimine structure, and examples thereof include polyethyleneimine, an ethyleneimine adduct obtained by adding an ethyleneimine to a polyacrylate, and/or Or a polyethyleneimine adduct. The polyethyleneimine is not particularly limited, and various polyethyleneimine can be used. The weight average molecular weight of the polyethylenimine is not particularly limited and is usually about 100 to 100,000. For example, as an example of a commercial product of polyethylenimine, the SP series (8?-〇〇3, SP006, SP012, SP018, SP103, SP110, SP200, etc.) manufactured by 曰本触媒股份有限公司 can be cited. , ΕΡΟΜΙΝΡ-1000, etc. Among them, ΕΡΟΜΙΝΡ-1000 is preferred. The ethyleneimide adduct obtained by adding ethyleneimine to polyacrylate and/or the polyacrylate of the polyethyleneimine adduct can be formed by emulsion polymerization to form an acrylic adhesive described later by a conventional method. The base polymer (acrylic polymer) of the agent is obtained by using an alkyl (meth)acrylate and a copolymerized monomer thereof. As the copolymerizable monomer, a monomer having a functional group such as a carboxyl group for reacting ethyleneimine or the like can be used. The proportion of the monomer having a uterine energy group such as a carboxyl group is appropriately adjusted by the ratio of ethyleneimine or the like which is reacted. Further, as the copolymerization monomer, a styrene monomer is preferably used. Further, 127421.doc •16-200838964 can also be an addition product of grafted polyethyleneimine by reacting a separately synthesized polyethyleneimine with a carboxyl group or the like in an acrylate. For example, as an example of a commercial item, a Japanese catalyst company can be cited.

Poriment NK-380. Further, an ethyleneimine adduct and/or a polyethyleneimine adduct of an acrylic polymer emulsion may be used. For example, as an example of a commercial item, p〇riment SK_i〇〇〇 manufactured by Nippon Shokubai Co., Ltd. can be cited.

Further, in forming the undercoat layer, in addition to the amine group-containing polymer, a compound which reacts with the amine group-containing polymer may be mixed and crosslinked to increase the strength of the undercoat layer. An epoxy compound or the like can be exemplified as the compound which reacts with the polymer containing an amine group.

In the case where the undercoat layer is formed on the above optical film, an adhesive layer is formed. For example, a primer solution such as a coating method, a dip coating method, or a spray coating method can be used to apply and dry an aqueous solution of polyethyleneimine to form an undercoat layer. As the thickness of the undercoat layer, θ 〜 500 is preferable. It is preferably about 5 nm to 5 (9) nm. If the thickness of the coating layer is thin, it may not have sufficient strength as the body, and sufficient adhesion may not be obtained. In addition, the == table may cause a decrease in optical characteristics. To,

The adhesive of the present invention is formed into a y-layered viscous agent, and as a monomer unit, as a monomer unit, t (meth) propyl ketone group _) and a mesogenic vinegar (10) having a ring structure. Is a polymer. (:) propyl propyl) propyl acrylate refers to acetoacetate and / or A, (methyl (meth) has the same meaning. With the present invention 127421.doc 200838964 (meth) acrylate alkyl The alkyl group of the ester (al) has an average number of carbon atoms of 〜~; [8 or so, preferably a carbon number of 1 to 9, and the alkyl group may be either a straight chain or a branched chain. Specific examples of the alkyl acrylate include decyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, (fluorenyl) N-butyl acrylate, isobutyl (meth)acrylate, amyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl acrylate Ester, (decyl) isooctyl acrylate, decyl (meth) acrylate, dodecyl (meth) acrylate, lauryl (meth) acrylate, stearyl phthalate (decyl) acrylate. These may be used singly or in combination, wherein the number of carbon atoms of the alkyl groups is preferably from 4 to 12. Examples of the ring structure of the acrylate (a2) include an aromatic ring structure and an alicyclic structure. Examples of the aromatic ring structure include a benzoquinone, a naphthalene ring, a thiophene ring, a pyridine ring, a pyrrole ring, a furan ring, and the like. The (meth) acrylate having a % structure may, for example, be phenoxyethyl (meth)acrylate or (meth)acrylic acid benzyl acetonate (meth)propionic acid phenoxy-2-hydroxyl Propyl vinegar, phenol ethylene oxide modified (meth)acrylic acid, (methyl 2-propoxyethyl acrylate, (meth) acrylic acid 2_(4-methoxyloxy) Ethyl ester, phenoxypropyl (meth)acrylate, phenoxy glycol vinegar (meth) acrylate (f-) phenyl thioacetate, (meth) acrylate Vinegar, (F-based) acrylonitrile-based styrene-based, phenylthioacetate, (meth)acrylic acid polystyrene-based S. On the other hand, as the alicyclic structure, a ring (CyCl0) ring can be cited. , returning to the ring, double ring (a ci〇) ring, tetrahydrobite ring, pie bite ring... than 嘻 环 ring, 琳 环 ring, etc. as a month of the ring 127421.doc • 18- 200838964 (meth) acrylate of t structure, for example, cyclohexyl (meth)acrylate, isobornyl (meth)acrylate, cyclopentyl (meth)acrylate, (methyl) Dicyclopentyl acrylate, methylene diacetate (meth) acrylate, tricyclo [5,2,6], (tetra)(tetramethyl) acrylate In the case of (meth)acrylic acid vinegar (a2) having a ring structure, it is preferred to have an aromatic ring structure (methyl group) from the viewpoint of reducing display unevenness in the peripheral portion. Acrylate. The reason is not clear, but the higher polarizability of the aromatic ring may be one of the reasons. Especially phenoxyethyl (meth)acrylate or phenoxy-2-(meth)acrylate The (meth) acrylate having a hydroxypropyl group such as hydroxypropyl group is preferred because it has a higher polarizability because the benzene ring is bonded to an ether bond. In the acrylic polymer, the ratio of the alkyl (meth)acrylate (al) and the (meth)acrylate (a2) having a fluorene structure is preferably in the range of from 3 Torr to 9 9% by weight. (Mercapto) alkyl acrylate (al), a (meth) acrylate (a2) having a ring structure is used as a monomer unit in a range of from 1% to 7% by weight. Further, the (meth) acrylate (a2) having a ring structure is more preferably 15 to 60% by weight, still more preferably 2 Å to 5% by weight. Among them, the alkyl (meth) acrylate (al) usually becomes a residue of the above component (a2). In order to reduce the unevenness of the peripheral portion, it is preferred that the ratio of the component (a2) is 10% by weight or more, and the content of the peripheral portion is increased to be less than 7% by weight. . Further, in addition to the above (al) component and the component (a2), the acrylic polymer may further contain a monomer (a3) component as a monomer unit. Examples of the component (a3) include 2-hydroxyethyl (meth)acrylate, hydroxypropyl acrylate (a 127421.doc -19-200838964), and _4-hydroxybutyl (meth)acrylate. Methyl)-6-hydroxyhexyl propionate, 8-hydroxyoctyl (meth)acrylate, 10-hydroxydecyl (meth)acrylate, 12-hydroxylauryl (meth)propionate a hydroxyl group-containing monomer such as (4-hydroxymethylcyclohexyl)-methyl acrylate; (meth)acrylic acid, ethyl (meth)acrylate, (meth)acrylic acid, itaconic acid, mala a carboxyl group-containing monomer such as acid, fumaric acid or crotonic acid; an acid anhydride group-containing monomer such as maleic anhydride or itaconic anhydride; a caprolactone adduct of acrylic acid; allylsulfonic acid and 2-(meth)acrylic acid; a sulfonic acid group-containing monomer such as guanamine-2-methylpropane sulfonic acid, (meth) acrylamide propylene sulfonic acid or sulfopropyl (meth) acrylate; 2-hydroxyethyl propylene oxime Such as a phosphate-containing monomer or the like. Further, examples of the component (a3) include a nitrogen-containing vinyl monomer. For example, maleimide; (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-hexyl ( Methyl) acrylamide, N-fluorenyl (decyl) acrylamide, N-butyl (decyl) acrylamide, N-butyl (meth) acrylamide or N-hydroxymethyl (A) (N-substituted) guanamine monomer such as acrylamide, N-methylolpropane (fluorenyl) acrylamide; aminoethyl (meth)acrylate; aminopropyl (meth)acrylate; (Methyl)alkylaminoalkyl (meth)acrylate, such as N,N-didecylaminoethyl acrylate or tert-butylaminoethyl (meth)acrylate; (methyl) (Methyl)acrylic acid alkoxyalkyl S such as methoxyethyl acrylate or ethoxyethyl (meth) acrylate; N-(methyl) propylene oxymethylene succinimide Or N-(methyl)propenyl fluorenyl-6-oxyhexamethylene succinimide, N-(methyl)acrylic acid -8-oxy octamethyl succinimide, etc. An amine type monomer etc. can also be enumerated as a monomer used for modification. 127421.doc -20- 200838964 Further, as the component (a3), vinyl acetate, vinyl propionate, N-vinyl carboxylic acid decylamine, styrene, α-methyl styrene, hydrazine- Vinyl monomer such as vinyl caprolactam; acrylonitrile, methyl propylene guess nitro group monomer; glycidyl (meth) acrylate and other epoxy group-containing acrylic monomer, · polyethylene Alcohol (meth) acrylate, polypropylene glycol (meth) acrylate, methoxy ethylene glycol (meth) acrylate, decyloxy polypropylene glycol (meth) acrylate diol acrylate monomer; fluorine A (meth) acrylate monomer such as (meth) acrylate, anthrone (meth) acrylate or 2-methoxyethyl acrylate. In order to improve the matrix polymer, the above component (a3) can be used arbitrarily. The above (a3) component may be used alone or in combination of two or more. The proportion of the component (a3) is preferably 1% by weight or less, more preferably 6% by weight or less, as the monomer unit in the acrylic polymer. When the ratio of the above-mentioned component is more than 10% by weight, the flexibility as an adhesive may be impaired, which is not preferable. As the component (a3), from the viewpoint of good adhesion, it is preferred to use The carboxyl group monomer is particularly preferably acrylic acid. When a carboxyl group-containing monomer is used, the ratio of λ is about 〇·% by weight, more preferably 0.5 to 8% by weight, and still more preferably 丨6 to 6% by weight. Further, from the viewpoint of the crosslinking point with the isocyanate crosslinking agent, it is preferred to use a hydroxyl group-containing monomer. When a hydroxyl group-containing monomer is used, the ratio is about 0.1 to 10% by weight. More preferably, it is 5 to 8% by weight, and more preferably 1 to 6% by weight. The above-mentioned acrylic polymer can be produced by various known methods, 127421.doc -21 - 200838964 For example A radical polymerization method such as a bulk polymerization method, a solution polymerization method, or a suspension polymerization method can be appropriately selected. As the radical polymerization initiator, various known materials such as an azo-based or a peroxide-based compound can be used. The reaction temperature is usually about 5 0 80 C The right 'reaction time is i to 8 hours. In addition, in the above production method, a solution polymerization method is preferred, and as the solvent of the acrylic polymer, acetic acid ethyl acetate, toluene or the like is used. The solution concentration is usually about The weight average molecular weight of the acrylic polymer which can be used as an aqueous emulsion is from 10,000 to 30,000. Compared with the case of 10,000 to 2 million, the molecular weight is more than 2 million to 3 million, and more preferably 2.1 million to 2.7 million. If the weight average molecular weight is less than 100,000, then On the other hand, when the weight average molecular weight exceeds 30 million, the self-adhesiveness is not good, and the acrylic polymer preferably has a molecular weight of The ratio of the low molecular weight of 100,000 or less is 15% by area or less. By reducing the ratio of the above-mentioned low molecular weight, the peripheral portion unevenness can be suppressed. The ratio of the low molecular weight is preferably 1% or less, and further Ok It is 5 area% or less. Among them, in order to reduce the ratio in the low molecule, the concentration of the polymer, the type of the initiator, the amount of the initiator, and the polymerization temperature can be controlled. The higher the monomer concentration, the lower the polymerization temperature is. When a azobisisobutyronitrile or a benzyl phenol peroxide is used as a specific initiator, it can be achieved by reacting at a polymerization temperature of about 50 to 6 ° C for about 8 hours. If it is low, the polymerization reaction cannot be initiated. If it is too high, the low molecular component increases and the peripheral portion is uneven. Further 127421.doc -22 - 200838964 Externally, even if the initiator is added during the polymerization, the low molecular component will The peripheral portion unevenness is deteriorated. The weight average molecular weight of the propylene glycol polymer is measured by the Gpc (gel permeation chromatography) method under the following conditions. Analytical device · Tosoh system, HLC-8120GPC. Column: Tosoh, G7000HXL+GMHXL+GMHXL. Column size·· each 7·8 ηπηφχ30 cm is 90 cm. Column temperature: 40 ° C. Flow rate: 0.8 ml/min. Injection volume: 1 〇〇 μ!. Eluent: tetrahydrofuran. Detective and non-difference refractometer. Standard sample: polystyrene. The ratio of the molecular weight of 100,000 or less was calculated based on the Gpc measurement result by a data processing apparatus (manufactured by Tosoh, GPC-8020). At this time, no monomer component is contained. The adhesive forming the pressure-sensitive adhesive layer of the present invention may contain a crosslinking agent in addition to the above-mentioned acrylic polymer as a matrix polymer. The crosslinking agent can improve the adhesion and durability to the optical film, and can also improve the reliability at a high temperature and maintain the shape of the adhesive itself. As the crosslinking agent, an isocyanate, an after-oxygen system, a peroxide system, a metal chelate compound, or a phlegm-based system can be suitably used. These crosslinking agents may be used alone or in combination of two or more. As the crosslinking agent, a crosslinking agent containing a functional group which exhibits reactivity with a hydroxyl group is preferred, and an isocyanate crosslinking agent is particularly preferred. 127421.doc -23- 200838964 An isocyanate compound can be used as the isocyanate crosslinking agent. Examples of the isocyanate compound include a sub-densyl diisocyanate, a chlorophenylene diisocyanate, a hexamethylene diisocyanate, a tetramethylene diisocyanate, an isophora-cyanocyanate, benzenedimethyl diisocyanate, and Isocyanate monomer such as diphenylmethane diisocyanate diphenylmethane isocyanate and such iso-nitrogen: addition-addition isocyanate opening direction obtained by addition of hydrazine monomer and trihydroxy hydrazine propane a trimeric isocyanate, a burret type compound, a known poly(tetra) polyhydric alcohol or a polyester polyol, an acrylic versatile hand, a butadiene polyol, a polyisoprene polyol, etc. The polyimidine obtained by the reaction is a prepolymer type isocyanic acid or the like. Examples of the oxygen-based co-linking agent include bisphenol A epichlorohydrin type epoxy ruthenium. Further, examples of the epoxy-based crosslinking agent include ethylene glycol diglycidyl ether, poly-r-age-monool monoglycidyl ether, glycerol diglycidyl ether, glycerol triglycidyl bond, and M•hex. Glycol diglycidil test, propane triglycidyl - ^ τ chloroglycolyl / m-phenyl glyceryl aniline w'-tetramethyl) production? p soil-amine, bis-(N,N-diglycidylamine tris: two, two:: ''tetraglycidylamino phenyl ketone, glycidol _, NN\^, MN·N N-diglycidylaminophenyl aniline, etc.. Hydroglycidyltoluidine and N,N• diglycidyl are used as a peroxide-based crosslinking agent, and an oxide can be mentioned, and still & As two cases of peroxydicarbonate: di-acidic acid, ethylhexyl, peroxy-butylcyclohexyl ester, peroxydicarbonate _ butyl acrylate, peroxidized new cockroach flute I - brother II Tributyl acrylate, peroxypivalic acid third vinegar, 127421.doc -24 - 200838964 second butyl peroxypivalate, _ 酉 酉 一 一 一 一 、 、 、 、 、 Oxide, peroxic acid, 3, tetramethyl butyl vinegar, bis ("benzyl styrene") 1 - cresyl peroxide, isobutyl phthalate, third vinegar It is preferred to use a dicyclobutylcyclohexyl oxyacetate and a dilaurin-based peroxide-based thioglycol peroxide which are excellent in cross-linking reaction efficiency. The olefinic polymer _ parts by weight is 10 parts by weight or less, preferably 5 parts by weight, more preferably 0. 0 2 to 3 parts by weight. Six strokes * ten], and the sound is used (4) If it exceeds 10 parts by weight, the adhesiveness may be lowered, which may be undesirable, and is not preferable. Further, in the optical adhesive of the present invention, it is necessary and without departing from the object of the present invention. Internally, fillers, pigments, scented Nanxun, #+^, 邑d fillers, and anti-adhesives, pigments, 2 glass fibers, glass beads, metal powders, and other inorganic powders may also be suitably used. Various additives such as an oxidizing agent, an ultraviolet ray absorbing agent, a ray ray silk mixture, and the like may be used as an adhesive layer containing fine particles to exhibit light diffusibility. As the above additive, it is preferred to use a Shi Xiyuan coupling agent. Examples of the occasional agent include 3·glycidoxypropyltrimethoxy sylvestre, 3-epoxypropyldipropylmethyldimethoxycarbazide, and 2—(3,4-ethoxycyclohexyl) Ethyl trimethoxy zeshi-sinter and other epoxy-based Shi Xi Xuan coupling agent; 3_aminopropyl trimethoate Base (4), N-servo-aminoethyl) 3_aminopropyltrimethoxy (tetra), ^ (2-aminoethyl) 3-aminopropylmethyldimethoxy residue, 3_triethoxymethylcarbazide Amino-containing decane coupling agent such as keto-N-(l,3-dimethylbutyl, knee|, butyl) propylamine; 2_127421.doc 25 200838964 Isocyanate-based sulphur coupling coupling hetero-acid _propyl three An ethoxylate or the like; a 3-chloropropyltrimethoxy decane; an alkane, etc. The decane coupling agent may be used alone or in combination of two or more kinds of ruthenium ethoxide. The blending amount of the decane coupling agent is 0.01 to 2 parts by weight, preferably 0 part by weight, per part by weight of the acrylic polymer. The adhesive optical film of the present invention is formed by forming an adhesive layer on the disc-shaped liquid crystal layer provided on the transparent base film by the adhesive.

Optical film. Wherein 'when the above-mentioned disc-shaped liquid crystal layer has an undercoat layer', an adhesive layer can be formed on the undercoat layer. The method for forming the adhesive layer is not particularly limited, and a method of applying and drying the adhesive solution by a flow molding method or a coating method or the like may be applied to the disc-shaped liquid crystal layer (or undercoat layer). Or a method of transferring by a release sheet provided with an adhesive layer. Examples of the coating method include a roll coating method such as reverse coating or gravure coating, a spin coating method, a sieve coating method, a spray coating method, a dip coating method, and a spray coating method. After the application of the adhesive solution, an adhesive layer having a predetermined thickness is obtained by a drying step using a volatile solvent or water. The thickness of the adhesive layer can be appropriately determined depending on the purpose of use, adhesion, etc., and is usually 1 to 500 μηι, preferably bu(10) μιη. Further preferably, it is 1 to 40 μm, and more preferably 5 to 3 μm, particularly preferably 1 to 25 μm. When it is thinner than 1 μm, the durability is poor, and if it is thick, it tends to float or peel off due to foaming or the like, and appearance defects are likely to occur. Alternatively, the adhesive layer can be formed by applying an Uv curable adhesive slurry to the release film to illuminate the electron beam or! ; ¥, etc., to form an adhesive layer containing the above acrylic polymer of 127421.doc -26- 200838964. At this time, since the adhesive contains a crosslinking agent, it is possible to maintain the reliability at a high temperature and the shape of the adhesive itself. Further, the crosslinking of the adhesive layer may be carried out by the above-described drying step or UV irradiation step, or in addition to, after drying, the crosslinking may be promoted by aging by adding a pulse or room temperature. The way of cross-linking. Examples of the constituent material of the release sheet include synthetic resin films such as paper, polyethylene, polypropylene, and polyethylene terephthalate, rubber sheets, paper, cloth, nonwoven fabric, mesh, and foam. A sheet or a metal foil, and a suitable sheet such as a laminate of the materials. In order to improve the peeling property with the adhesive layer, the surface of the release sheet may be subjected to a low-adhesive peeling treatment such as an anthrone treatment, a long-chain alkyl treatment, or a fluorine treatment. Further, in each layer such as an optical film or an adhesive layer of the adhesive optical film of the present invention, for example, a water-based acid ester compound, a benzophenol (Phen〇1) compound, a benzotriazine compound or A method of treating an ultraviolet absorber such as a lanthanum cyanoacrylate compound or a nickel complex salt compound to have an ultraviolet absorbing ability or the like. ☆ In order to impart static interference, the adhesive optical film can also contain antistatic ^. An antistatic agent may be contained in each layer. In addition, it is also possible to form an antistatic agent: layer μ as an antistatic agent, and examples thereof include an ionic surfactant system; polystyrene to porphin, polyfluorene, and each of conductive polymers such as polyfluorene and bismuth oxide;惫4 Bu, such as the person to prove the emulsified copper metal oxide system, especially the self-property, appearance, Shaanxi φ to the special side of the static interference effect and anti-static interference effect in the heating and humidification of the m gold from λα + γ From the viewpoint of t ^ 钇疋 II, it is preferred to use a conductive polymer 127421.doc • 27- 200838964, which is particularly preferable as a water-soluble conductive substance such as aniline or (tetra) pheno- or water-dispersible conductivity. In this case, when a water-based conductive polymer or a water-dispersible conductive polymer is used as the antistatic layer forming material, the deterioration of the optical film substrate caused by the organic solvent can be suppressed in the coating step. Therefore, as shown in FIG. 3, the optical film of the present invention can be used for the transparent substrate film, and the side of the layer on which the discotic liquid crystal layer 3 is not formed has the polarizing element 6 and the optical transparency of the transparent protective film 7. Film. The polarizing element 6 is adhered through the adhesive The base film i. In addition, in FIGS. 2 and 3, the transparent base film i also serves as a transparent protective film of the polarizing element 6 but may be laminated on the transparent base film 1 with or without surface protection. The polarizing element of the film is not particularly limited, and various polarizing elements can be used. Examples of the polarizing element include a polyvinyl alcohol film, a partially methylated polyalkenyl film, and ethylene vinyl acetate copolymer. a part of the saponification film, such as a saponification film, a material that is uniaxially stretched after being adsorbed with a dichroic substance such as a dichromatic dye or a dichroic dye; a dehydrated material of polyvinyl alcohol or a dehydrochlorinated solution of polyvinyl chloride A polyolefin-based alignment film such as a processed material, etc. Among them, a polarizing element composed of a polyvinyl alcohol-based material and a dichroic material such as ruthenium is preferable. (4) The thickness of the polarizing element is not particularly limited, but is usually about A polarizing element obtained by uniaxially stretching a polyvinyl alcohol-based film by iodine, for example, can be dyed by dipping the polyethylene glycol into an aqueous solution of hydrazine, and then stretching to the original It is made by a method of 3 to 7 times the length. If necessary, it can also be used in water soluble 127421.doe 28 · 200838964 which can contain potassium iodide such as boric acid or zinc sulphate or zinc sulphate. In addition, 'as needed, too much hatred> knives J in variegated The polyethylene film is immersed in water and washed with water. By the water method, the semi-r + Α ^ (3) field & 冼 polyvinyl alcohol film, in addition to washing the dirt and the anti-personal on the surface of the polyvinyl alcohol film H, hit ten, > aL. In addition to preventing the adhesion agent for a long time, it is also possible to prevent the dyeing of the polytetraethylene alcohol film by swelling the polyethylene glycol film. After the iodine solution is dyed, the stretching may be carried out while stretching, or may be dyed with moth after stretching, or may be carried out in an aqueous solution of boric acid or Wei potassium or in a water bath.

A material with good properties in terms of moisture barrier properties, isotropy, and the like. The transparent protective film can use the same material as the transparent substrate film. In addition, the same is true in terms of thickness. The material for forming the transparent protective film provided on one or both sides of the above-mentioned polarizing element is preferably in transparency, mechanical strength, thermal stability, and in addition, the same polymer can be used for the transparent substrate film and the transparent protective film. The material 'can also use different polymer materials and the like. / The above polarizing element, the transparent base film, and the transparent protective film are usually adhered via a water: adhesive. Examples of the water-based adhesive include an isocyanate-based adhesive, a polyvinyl alcohol-based adhesive, a gelatin-based adhesive, a vinyl latex, a water-based amide, and a 7jc-based polyester. Further, when the polarizing element, the transparent substrate film, and the transparent protective film are bonded, the activation treatment can be carried out in the transparent substrate film and the transparent protective film. The activation treatment may be carried out by various methods such as a treatment, a corona s, a low pressure uv treatment, a plasma treatment, or the like. The activation treatment is particularly effective when the transparent base film is triacetyl cellulose, norbornene resin, polycarbonate, or polyolefin resin. ', on the surface of the transparent protective film provided with the adhesive polarizing element, may also be 127421.doc •29· 200838964 for diffuse or anti-glare for hard layer or anti-reflection treatment, anti-adhesion treatment, light treatment . The purpose of the hard coat treatment is to prevent the surface of the polarizing plate from being damaged, for example, by adding a hardness and sliding of a suitable ultraviolet curable resin such as a bupropion acid or a sylvestre to the surface of the transparent protective film. A method such as a good curing method such as a characteristic is formed. The purpose of performing the anti-reflection treatment is to prevent the reflection of the external light on the surface of the opposite side, and the formation of the previous anti-reflection film, etc.

And finished. In addition, the purpose of the real ride is to prevent adhesion to adjacent layers of other components. In addition, the purpose of performing the anti-glare treatment is to prevent the external light from being reflected on the surface of the polarizing plate and to interfere with the identification of the transmitted light of the polarizing plate, for example, by using a roughening method using a sandpaper type and an embossing method or A fine uneven structure is formed on the surface of the transparent protective film by a suitable method such as a method of blending the transparent fine particles. The neutrino contained in the formation of the surface fine concavo-convex structure described above, for example, can be used for a silica having a uniform particle diameter of 〇·5 to (4): aluminum, iron oxide, oxidized erbium, tin oxide, and oxidizing pot. An inorganic fine particle having a composition such as an oxidized surface cerium oxide and sometimes also having conductivity, and a permeable particle such as an organic fine particle (including a bead; or the like) composed of a crosslinked or uncrosslinked polymer. When the surface fine uneven structure is formed, the amount of fine particles used is usually about 2 to 50 parts by weight, preferably 5 to 25 parts by weight of the transparent anti-glare layer, relative to the transparent resin forming the surface fine uneven structure. It is also used as a diffusing layer (viewing angle expansion function, etc.) for diffusing the transmitted light of the polarizing plate to expand the viewing angle or the like. Furthermore, the anti-reflection layer 'anti-adhesion layer, diffusion layer or anti-glare layer 127421.doc • 30 - 200838964, etc., may be disposed separately from the transparent protective film, and may be disposed separately from the transparent protective film. An optical layer is set. In addition, the optical film used in the adhesive optical film of the present invention can be laminated on an optical layer used for forming an image display device such as a liquid crystal display device, in addition to the optical film in which the polarizing plate is laminated. For example, a reflecting plate and a semi-transmissive plate, a retardation plate (including a 1/2 or 1/4 wave plate), and a twist-improving film are equal to a film which is an optical layer which can be used in formation of a liquid crystal display device or the like. These may be used alone or as an optical film, or may be laminated on one or more layers on the above polarizing plate in actual use. A particularly preferable polarizing plate is a reflective polarizing plate or a semi-transmissive polarizing plate which is formed by laminating a reflecting plate or a semi-transmissive reflecting plate on a polarizing plate; and an elliptically polarizing plate or a circle formed by laminating a phase difference plate on the polarizing plate. a polarizing plate; or a polarizing plate formed by laminating a brightness improving film on a polarizing plate. The reflective polarizing plate is formed by providing a reflective layer on a polarizing plate, and can be used to form a liquid crystal display device of a type that reflects incident light incident from the identification side (display side) for display, and can omit a light source such as a built-in backlight. Therefore, there is an advantage that the liquid crystal display device can be easily thinned. When the reflective polarizing plate is formed, it may be carried out by a suitable method such as a method of attaching a reflective layer made of metal or the like to one surface of the polarizing plate via a transparent protective layer or the like as needed. Specific examples of the reflective polarizing plate include a polarizing plate in which a reflective layer composed of a reflective metal such as aluminum or a vapor deposited film is formed on one surface of a transparent protective film which is subjected to matte treatment as needed. In addition, a reflective polarizing plate or the like having a fine concavo-convex junction 127421.doc -31-200838964 structure and having a reflective layer having a fine uneven structure thereon is formed by containing the fine particles in the transparent protective film. The reflective layer of the fine uneven structure diffuses the incident light by diffuse reflection, thereby preventing directionality and appearance from being bright, and has the advantage of suppressing unevenness in brightness and the like. In addition, the protective film containing fine particles also has the advantage that when the incident light and the reflected light pass through k, the light and dark unevenness can be suppressed by diffusing into the step. The formation of the reflective layer of the fine uneven structure reflecting the fine uneven structure of the surface of the transparent protective film can be applied to the surface of the transparent protective layer by a suitable method such as a vacuum deposition method, an ion plating method, a sputtering method, or a mineral coating method. The method of directly attaching a metal is performed. Instead of directly attaching the reflecting plate to the transparent protective film of the polarizing plate, a reflective layer may be provided on a suitable film based on the transparent film to form a reflecting sheet or the like, and then used as a reflecting plate. Further, since the reflective layer is usually composed of a metal, it is preferable to prevent the reflectance from being lowered by oxidation, to maintain the initial reflectance for a long period of time, or to avoid the viewpoint of providing a separate protective layer. The use form of the reflective surface is covered with a transparent protective film or a polarizing plate or the like. Further, in the above description, the semi-transmissive polarizing plate can be obtained by forming a semi-transmissive reflective layer such as a half mirror which transmits light while reflecting light. The semi-transmissive polarizing plate is usually disposed on the back side of the liquid crystal cell, and can form a liquid crystal display device or the like of the following type, that is, when a liquid crystal display device or the like is used in a relatively bright environment, reflection is from the identification side (display The image is displayed by the incident light of the side, and the image is displayed using a built-in light source such as a backlight built in the back surface of the transflective polarizer in a relatively dark environment. That is, the semi-transmissive polarizing plate is very useful in the formation of the following types of liquid crystal display devices 127421.doc -32-200838964, etc., in a bright environment, the energy of a light source such as a backlight can be saved, and even if it is dark In the environment, it is also useful to form a liquid crystal display device of a type in which a built-in light source is used. Hereinafter, an elliptically polarizing plate or a circularly polarizing plate which is formed by laminating a phase difference plate on a polarizing plate will be described. When the linearly polarized light is changed to (4) polarized light or circularly polarized light, or the elliptically polarized or circularly polarized light is changed to linearly polarized light, or the polarized direction of the linearly polarized light is changed, a phase difference plate or the like can be used. In particular, as a phase difference plate which changes linearly polarized light into circularly polarized light or changes circularly polarized light into linearly polarized light, a so-called quarter-wave plate (also referred to as an in/out plate) can be used. A 1/2 wave plate (also known as a λ/2 plate) is usually used to change the direction of polarization of linearly polarized light. The elliptically polarizing plate can be effectively used to compensate (prevent) the coloring (blue or yellow) of the super twisted nematic (STN) type liquid crystal display device due to the birefringence of the liquid crystal layer, thereby performing white and black display without the above coloring. The situation, etc. Further, it is preferable that the polarizing plate for controlling the three-dimensional refractive index can compensate (prevent) the coloring which occurs when the face of the liquid crystal display device is observed from the oblique direction. The circularly polarizing plate can be effectively used, for example, for adjusting the color tone of an image of a reflective liquid crystal display device that displays an image in color, and also has a function of preventing reflection. Examples of the phase difference plate include a unidirectional or bidirectional stretching of a polymer material: a birefringent film formed in the middle, an alignment film of a liquid crystal polymer, and a member for supporting an alignment layer of a liquid crystal polymer with a film. The thickness of the phase difference plate is also not particularly limited, and is generally about 2 〇 15 15 μηι. Examples of the above-mentioned southern molecular material include polyvinyl alcohol and polyvinyl alcohol 127421.doc -33- 200838964 butyral, polymethyl vinyl ether, polyhydroxyethyl acrylate, hydroxyethyl cellulose propylene fiber , methyl cellulose, polycarbonate, poly aryl, quartz, polyethylene terephthalate, polyethylene naphthalate, polyether oxime, polyphenylene sulfide, poly Phenyl ether, polyallyl sulfone, polyamine, polyamine, polyolefin, polyethylene, cellulose polymer, norbornene, or binary system, ternary system Various copolymers, graft copolymers, mixtures, and the like. These polymer materials can be oriented (stretched film) by stretching or the like. Examples of the liquid crystal polymer include a main chain type or a side chain type polymerization in which a conjugated linear atomic group (liquid crystal primordium, meSogene) which imparts liquid crystal alignment properties is added to a main chain or a side chain of a polymer. Things and so on. Specific examples of the main chain liquid crystal polymer include a polymer having a structure in which a liquid crystal nucleus is bonded to a space at which flexibility is imparted, for example, a nematic polyester liquid crystal polymer or a disk. Polymer or cholesteric polymer: Specific examples of the side chain type liquid crystalline polymer include the following materials such as sputum and sputum, and polyoxyxene, polyacrylic acid, polymethyl methacrylate, and polyacrylic acid as main chains. The skeleton and the side chain have a compound which is substituted by a spacer which is composed of a common atomic group, and which has a liquid crystal original base group which is formed by substitution of a para-alignment with a para-orientation. The liquid crystal is not subjected to the treatment by rubbing the surface of the film of the polyimide film or the polyvinyl alcohol formed on the glass plate, for example, by oblique vapor deposition. On the alignment treatment surface of the material such as Shi Xi, the solution of the liquid crystalline polymer is developed and then heat-treated. The phase difference plate may be, for example, a magnetic wave plate for each recording or a material for compensating for a phase difference such as a color or a viewing angle formed by a double fold of the liquid crystal layer, 127421.doc • 34-200838964, etc., having a phase difference corresponding to the purpose of use. It is also possible to control a material having optical characteristics such as a phase difference by laminating two or more kinds of retardation plates. Further, the elliptically polarizing plate or the reflective elliptically polarizing plate is formed by appropriately combining and laminating a polarizing plate, a reflective polarizing plate, and a retardation plate. The elliptically polarizing plate or the like may be formed by sequentially stacking (reflective) polarizing plates and retardation plates in the manufacturing process of the liquid crystal display device to form a combination of a (reflective) polarizing plate and a phase difference plate. When it is formed in advance as an optical ray such as a circular polarizer, it is excellent in quality stability and lamination operability, and therefore has an advantage of improving the manufacturing efficiency of a liquid crystal display device or the like. The polarizing plate in which the polarizing plate and the redundancy improving film are bonded together is usually one side of the back surface of the liquid crystal single 7G. The brightness-improving film exhibits a film having a characteristic of reflecting a linearly polarized light of a specific polarization axis or a circularly polarized light of a specific direction when a natural light is incident due to a backlight of a liquid crystal display device or the like, or reflection from the back side. Other light passes through. Therefore, the polarizing plate in which the brightness improving film is laminated with the polarizing plate allows light from a light source such as a backlight to be incident, thereby obtaining transmitted light of a specific polarized state, and at the same time, light other than the specific polarized light is not transmitted. Reflected. The light reflected on the brightness improving film surface is reversed by a reflection layer or the like provided on the rear side thereof, and is again incident on the brightness improving film, and a part or all of the light is transmitted as a specific polarized state, thereby increasing transmission. The brightness improves the light of the film while providing the polarizing element with polarized light that is hard to absorb, thereby increasing the amount of light that can be utilized in display of the liquid crystal display image, etc., and thereby improving the brightness. In other words, when the light-improving film is not used, and the light is incident from the back side of the liquid crystal cell through the back side of the liquid crystal cell, such as a backlight, the polarizing direction does not coincide with the polarization axis of the polarizing element. The light is substantially absorbed by the polarizing element and thus cannot pass through the polarizing element. That is, although it differs depending on the characteristics of the polarizing element to be used, about 50% of the light is absorbed by the polarizing element, so that the amount of light that can be utilized in liquid crystal image display or the like is reduced, resulting in darkening of the image. The twist-improving film is repeatedly operated such that light having a polarization direction that can be absorbed by the polarizing element is not incident on the polarizing element, and is reflected on the π-degree improving film, and is further provided on the rear side thereof. The reflection layer or the like is reversed to cause the light to be incident on the brightness improving film again, whereby the brightness improving film changes the polarization direction of the light reflected and inverted between the two to be able to pass through the polarizing element. Since the polarized light in the polarization direction is transmitted and supplied to the polarizing element, it is possible to effectively use light such as a backlight in the display of the image of the liquid crystal display device, thereby making the screen bright. A diffusion plate may be provided between the brightness improving film and the above reflective layer or the like. The light in the polarized state reflected by the brightness improving film faces the reflecting layer 4', but the diffusing plate is provided to uniformly diffuse the passing light while eliminating the polarized state and becoming a non-polarized state. In other words, the light in the natural light state is reflected on the reflective layer or the like, and is reflected by the reflective layer or the like, and is again incident on the brightness improving film by the diffusion plate. By providing a diffusing plate between the brightness improving film and the reflective layer to restore the polarized light to the original natural light state, the brightness of the display pupil surface can be maintained while reducing the unevenness of the brightness of the display pupil surface, thereby providing uniformity. And a bright picture. By arranging the diffusing plate, the number of repeated reflections of the first incident light can be appropriately increased, and the diffusing function of the diffusing plate can be combined to provide a uniform and bright display. As the brightness improving film, for example, a multilayer film of a dielectric material or a multilayered laminated body of a thin film having different refractive index anisotropy or the like can be used to exhibit a characteristic of transmitting a linear polarized light of a specific polarizing axis and reflecting other light. An alignment film such as an alignment film of an alcohol-based liquid crystal polymer or a film or the like which supports the alignment liquid crystal layer on a film substrate, or the like which exhibits a property of polarizing light of any one of left-handed or right-handed rotation and transmitting other light. . Therefore, by using the above-described brightness improving film of a type that transmits a linearly polarized light of a specific polarizing axis, the transmitted light is incident on the polarizing plate directly in a direction in which the polarizing axis coincides, thereby suppressing absorption by the polarizing plate. At the same time as the loss, the light is transmitted efficiently. On the other hand, a brightness improving film of a type that transmits circularly polarized light by a cholesteric liquid crystal layer or the like can directly cause light to enter the polarizing element. However, it is preferable to pass the phase difference plate from the viewpoint of suppressing absorption loss. The circularly polarized light is linearly polarized and then incident on the polarizing plate. Further, by using a quarter-wave plate as the phase difference plate, circularly polarized light can be converted into linearly polarized light. A phase difference plate capable of functioning as a quarter-wave plate in a wide wavelength range such as a visible light region, for example, can be obtained by using a light beam of 550 nm with respect to a wavelength of 550 nm. The phase difference layer that functions and the phase difference layer that displays other phase difference characteristics can be, for example, a method in which the phase difference layers of the 1/2 wave plate function overlap. Therefore, the phase difference plate disposed between the polarizing plate and the brightness improving film may be composed of one or two or more layers of retardation layers. Furthermore, in the case of the cholesteric liquid crystal layer, materials having different reflection wavelengths of 127421.doc -37 to 200838964 may be combined to form a configuration of two or more layers, thereby obtaining a visible light region or the like. A member that reflects a circularly polarized light over a wide wavelength range, thereby obtaining a transmitted circularly polarized light over a wide wavelength range based thereon. Further, the polarizing plate may be composed of a member in which a polarizing plate and two or more optical layers are laminated, as in the above-described polarization separating type polarizing plate. Therefore, a reflective elliptically polarizing plate or a semi-transmissive elliptically polarizing plate or the like which is formed by combining the above-described reflective polarizing plate or semi-transmissive 35-light plate and retardation plate may be used. The above-mentioned optical layer <optical film is laminated on a polarizing plate, and is formed by sequentially stacking layers in a manufacturing process such as liquid crystal, display device, etc., but the polarizing plate which has been laminated to become an optical film is stable in quality. Since it is excellent in the nature or the assembly operation, etc., it has the point which can improve the manufacturing process of a liquid crystal display device, etc.. A suitable bonding means such as an adhesive layer can be used in the laminate. When the above-mentioned polarizing plate and other optical layers are bonded, the optical axes thereof can be appropriately arranged according to the target phase difference characteristics and the like. Further, for each layer such as an optical film or an adhesive layer of the adhesive optical film of the present invention, for example, a water-based acid ester compound or a benzophenol coffee (4) coffee 11.1) compound or a benzotriazine compound may be used. Or bismuth cyanoacrylate compounds,! The ruthenium complex ruthenium compound and the ultraviolet absorber are treated in such a manner as to have ultraviolet absorbing ability and the like. The adhesive optical film of the moon can be applied to formation of various image display devices such as liquid crystal display devices. The formation of the liquid crystal display device can be carried out in the same manner as before. In other words, the liquid crystal display device can be formed by a suitable liquid crystal cell, a liquid crystal cell, and an optical component, and a component such as a "month system", which is incorporated in a drive circuit or the like. In the invention of 127421.doc -38-200838964, in addition to the use of the adhesive type optical joint edge of the present invention, the helmet can be smashed, and the mail can be carried out in the same manner as before. For liquids, for example, TN type or The STN type, the π type, etc. can also be used to make the liquid crystal cell of the 4th thinking type. It can be formed on the strict phase of the liquid crystal cell, and the adhesive film can be placed on the early side or both sides. In the lighting system, a backlight or a reflective sheet is used. At this time, the optical film of the present invention is placed on one side of the liquid crystal cell, and the optical film is used. Set to %, which can be the same as the same

Body j ^ material, can also be different materials. In addition, when a liquid crystal display device is formed, one or two or more layers such as a diffusion plate, an anti-glare anti-glare layer, an anti-reflection film, a protective plate, an iridium array, and the like may be disposed at a position on the circumference of the liquid crystal display device. The lens array sheet, the squirrel r ^ ^ ^ especially / the plate, the backlight, and the like. 0. Hereinafter, the organic electroluminescence device (organic EL device) is said to be an optical film (polarizer) of the present invention. Etc.) can also be applied to organic Du display devices. Generally, in an organic EL display device, a transparent electrode, an organic light-emitting layer, and a metal electrode are sequentially laminated on a transparent substrate to form an illuminant (electroluminescence). Here, the organic light-emitting layer is a laminate of various organic thin films, and is known, for example, a hole injection layer composed of a triphenylamine derivative or the like and a laminate of a light-emitting layer composed of a fluorescent organic solid such as ruthenium. Or a combination of such a light-emitting layer, an electron injection layer made of a perylene derivative or the like, or a laminate of the hole injection layer, the light-emitting layer, and the electron injection layer. The organic EL display device emits light according to the principle that a voltage of 127421.doc -39-200838964 and electrons are injected into the organic light-emitting layer by applying a voltage on the transparent electrode and the metal electrode, and the holes and electrons are injected from the organic light-emitting layer. The energy generated by the gentleman's bag g, the electric Dingzhi, and the mouth is excited by the fluorescent substance, and when the excited fluorescent substance returns to the ground state, the light is emitted. The recombination mechanism in the middle is the same as that of a general diode, and it is also possible to estimate that the current and the luminous intensity exhibit a strong nonlinearity with respect to the applied voltage with rectification. In the organic EL display device, in order to obtain the light generated in the organic light-emitting layer, at least the square electrode must be transparent, and the transparent electrode made of a transparent conductor such as indium tin oxide (ITO) is used as the transparent electrode. Used as an anode. On the other hand, in order to facilitate electron injection and improve luminous efficiency, it is important to use a substance having a small work function for the cathode, and a metal electrode such as Mg_Ag or Al-Li is usually used. In the organic EL display device having the above configuration, the organic light-emitting layer is formed of an extremely thin film having a thickness of about 10 nm. Therefore, the organic light-emitting layer also transmits light substantially completely like the transparent electrode. As a result, light that is incident from the surface of the transparent substrate and transmitted through the transparent electrode and the organic light-emitting layer and is reflected by the metal electrode when it is not emitted is emitted to the surface side of the transparent substrate again. Therefore, when it is recognized from the outside, organic The display surface of the el device is like a mirror surface. In an organic EL display device including an organic electroluminescence body as described below, a polarizing plate can be disposed on the surface side of the transparent electrode, and a phase difference plate is provided between the transparent electrode and the polarizing plate. In the organic electroluminescence body, a transparent electrode is provided on the surface side of the organic light-emitting layer that emits light by applying a voltage, and a metal electrode is provided on the back side of the organic light-emitting layer. Since the phase difference plate and the polarizing plate have a function of being polarized by the light incident from the outside and reflected by the metal electrode 127421.doc -40 - 200838964, the polarizing action has the effect of making the mirror surface of the metal electrode unrecognizable from the outside. . In particular, when the phase difference plate is formed by a quarter-wave plate and the angle between the polarization directions of the polarizing plate and the phase difference plate is adjusted to π/4, the mirror surface of the metal electrode can be completely shielded. In other words, the external light incident on the organic EL display device transmits only the linearly polarized light component due to the presence of the polarizing plate. The linearly polarized light is generally converted into elliptically polarized light by the phase difference plate, and when the phase difference plate is a quarter wave plate and the angle of polarization of the polarizing plate and the phase difference plate is π/4, it becomes circularly polarized. The circularly polarized light is transmitted through the transparent substrate, the transparent electrode, and the organic thin film, and is reflected on the metal electrode, and then again transmitted through the organic thin film, the transparent electrode, and the transparent substrate to be linearly polarized by the phase difference plate. Since the linearly polarized light is orthogonal to the polarizing direction of the polarizing plate, the polarizing plate cannot be transmitted. As a result, the mirror surface of the metal electrode can be completely shielded. [Examples] Hereinafter, the present invention will be specifically described based on examples, but the present invention is not limited to the examples. Example 1 <Preparation of Adhesive> In a four-necked flask equipped with a condenser, a stirring blade, and a thermometer, 87 parts by weight of butyl acrylate and phenoxy acrylate were placed together with 140 parts by weight of ethyl acetate. 13 parts by weight of vinegar and 2 parts by weight of 2,2 匕 azobisisobutyronitrile. After sufficiently replacing with nitrogen, the mixture was reacted at 55 ° C for 8 hours while stirring under a nitrogen stream to obtain a weight average. A solution of a propionic acid polymer having a molecular weight of 1.7 million (ratio of molecular weight of 100,000 or less: 3 area%). Phase 127421.doc -41 - 200838964 For the solid content 丨〇〇 part by weight of the acrylic polymer solution, a sub-cylylene diisocyanate adduct of trimethyl methacrylate is added in an amount of 0.6 part by weight of the solid component. A polyisocyanate-based crosslinking agent (c〇r〇nate [manufactured by Nippon Polyurethane Co., Ltd.) and 〇·1 part by weight of a decane coupling agent (manufactured by Shin-Etsu Chemical Co., Ltd., KBM403) were added to prepare an adhesive solution. <Formation of Adhesive Layer> The resulting adhesive solution was applied to a separator composed of a polyester film (thickness: 38 μm) which had been subjected to mold release treatment by a reverse roll coating method so that the obtained adhesive solution was applied so that ❿ The thickness of the adhesive layer after drying is 25 μm, and heat treatment is performed at 130 ° C for 3 minutes to volatilize the solvent to obtain an adhesive layer. <Optical film> A wide viewing angle compensation film (wv) film manufactured by Fujifilm Corporation was used. The wv film was placed on a cellulose-based polymer film as a transparent substrate film, and a discotic liquid crystal layer having discotic liquid crystal molecules was obliquely aligned. Among them, the WV film was separated into an inclined alignment layer of discotic liquid crystal molecules, and the characteristics of λ = 590 nm were measured by KOBRA-21ADH manufactured by Oji Scientific Instruments Co., Ltd. The maximum refractive index in the plane is nx, and the refractive index in the direction orthogonal to the direction having the maximum refractive index in the plane is ny, and the refractive index in the thickness direction is nz °, and the end is not d. The transparent support is Δnd^nx-nyhhQ ' nm, Rth=(nx-nz)xd=l〇〇 nm. On the other hand, the phase difference of the oblique alignment layer was measured in the direction in which the optical axis was tilted by -50 ° C to 5 (TC changed the incident angle, and the result was And = 30 nm, Rth = l 50 nm, and the average tilt angle θ = ΐ 7 After the saponification treatment of the transparent substrate film side of the WV film, the saponified surface and the polyvinyl alcohol 127421.doc -42-200838964-based polarizing element are adhered by a polyethylene glycol-based adhesive. On the other hand, on the other side of the polarizing element, the transparent protective film (triethyl cellulose film, thickness) is bonded by the same polyvinyl alcohol-based adhesive as described above. An optical film having a polarizing plate (a polarizing plate with a viewing angle-enlarging film) is made of 8 〇μπι). <Production of an adhesive optical film> By discarding, the disk of the polarizing plate of the above-mentioned angle of view is enlarged The surface of the liquid crystal layer was coated with a primer to form an undercoat layer (having a thickness of 1 nm). The primer was a polyethyleneimine system (Poriment NK-380, manufactured by Nippon Shokubai Co., Ltd.). Adhesive on the undercoat layer has formed the above adhesive layer Sheets, an adhesive optical film was produced. Examples 2 to 12, Comparative Examples 1 to 4 In Example 1, when the adhesive was prepared, the type or blending of the monomer components was changed as shown in Table 1, and the obtained ones were obtained. The adhesive composition was prepared in the same manner as in Example i except that the ratio of the weight average molecular weight and the low molecular weight of the acrylic polymer was controlled as shown in Table i. The acrylic polymer was prepared except Example 5. The low molecular weight ratio was polymerized by polymerization at a polymerization temperature of 50 to 60 C for 8 hours, and the ratio of low molecular weight was as shown in Table 1. In Example 5, it was polymerized for 4 hours and then at 8 (TC). The polymerization was carried out for 2 hours, and the ratio of the low molecular weight was controlled to be the same as in the above, except that the adhesive solution was used, and an adhesive optical film was produced in the same manner as in Example 。. In the following, the following evaluations were carried out, and the results are shown in Table 1. 127421.doc -43- 200838964 (outside unevenness) Prepare 2 cuts into vertical 42〇11111}>< Adhesive optics of size 32 () Film. The adhesive optical film was bonded to both sides of an inorganic glass plate having a thickness of mm7 mm by a layer >1 machine to form a crossed Nicol. Then, 15 at 5 〇C, 5 atm. High-pressure treatment in minutes. Then, under the conditions of i〇〇〇c (heating) and 6〇t, 90% rh· (humidification), the sample was treated for 500 hours. On the backlight, the light leakage was visually evaluated using the following criteria.

◎ ·· There is no unevenness in the surrounding area, and there is no problem in practical use. 〇··Slightly visible unevenness in the surrounding area, practically no problem. △•The peripheral part is uneven, and there is no problem in practical use. X · Peripheral unevenness is visible and there is a problem in practical use (durability) Adhesive optical film (15 inches in size) is adhered to non-glass (eoning 1737, thick 〇.7 mm) to thief, 〇5 The high pressure pin of Mpa is processed for μ minutes. Then, the sample was subjected to treatment for 5 hours in 9 (TC (heating) and 6 (rc, y:>/° R, H. (under humidification conditions)', and the evaluation was evaluated. Standard + 曰〇 bubble 0

X Adhesive optical film and alkali-free glass Adhesive optical film and non-alkali glass bubble 0 without peeling or floating between peeling or floating hair 127421.doc -44- 200838964

Evaluation of long-term humidification 〇〇〇〇〇〇〇〇〇〇〇〇 〇〇〇〇〇〇〇〇〇〇〇〇 〇〇 heating 〇〇〇〇〇〇〇〇〇〇〇〇 〇〇〇〇〇〇〇〇〇〇〇〇 〇〇 uneven surrounding humidification 〇〇〇 ◎ > ◎ ◎ 〇<] < ◎ ◎ XXXX Heating 〇〇〇 ◎ <1 ◎ ◎ 〇 << ◎ ◎ XXXX Ratio of low molecular weight component of acrylic polymer (area%) ΓΛ (N (N inch inch inch iT) Inch ro Weight average molecular weight 1.7 million 1.25 million 2.5 million 2 million 2.5 million 2.4 million 2.5 million 2.1 million 1.4 million 2.4 million 2.3 million 600,000 million 1-2.3 million I1.7 million monomer components and their parts by weight ( A3) _^_1 HBA 1 f 1 m· I 1 1 1 m 〇m ο 1 t MEA 1 1 1 1 1 1 1 1 1 1 DMAE 1 1 1 1 » 1 1 r 1 1 1 I 1 τ—' 1 1 1 1 1-H r-^ monomer (a2) CHA 1 1 1 1 K 1 1 general 1 1 1 ΙΒΧΑ 1 1 1 1 I 1 1 I 1 1 ΒζΑ } 1 1 1 1 1 1 1 1 1 ΗΡΡΑ 1 Cold 1 1 沄1 1 1 1 1 » ΡΕΑ cn 48.7 9 1 1 1 48.71 48.71 g 1 Single (al) S5 § On 0\ ON ON OS Example 1 Example 2 Example 3 Example 4 | Example 5 I Example 6 | Example 7 Example 8 | Example 9 Example 10 Example 11 Example 12 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 45-127421.doc 200838964 In Table 1, BA: n-butyl propionate, PEA: phenoxyethyl acrylate, HPPA: phenoxy-2-propyl propyl acrylate,

BzA ··propionate, IBXA: isobornyl acrylate, CHA: cyclohexyl acrylate, AA: acrylic acid, DMAEA: dimethylaminoethyl acrylate, MEA: methoxyethyl acrylate,

HBA: 2, hydroxybutyl acrylate. [Simple description of the diagram] A cross-sectional view of an example. A cross-sectional view of an example. A cross-sectional view of an example. 1 is a view showing an adhesive optical film of the present invention. FIG. 2 is a view showing an adhesive optical film of the present invention. FIG. 3 is a view showing one of the adhesive optical films of the present invention. Membrane disc liquid crystal layer undercoat adhesive layer polarizing element transparent protective film 127421.doc -46-

Claims (1)

200838964 X. Patent application scope: 1 . An adhesive optical film which is provided with an adhesive layer on the disc-shaped liquid crystal layer having an optical film of a discotic liquid crystal layer on one side of a transparent substrate film, wherein The adhesive layer is formed of an acrylic polymer containing an (meth)acrylic acid ester (al) and a ring structure (A), and an adhesive containing a crosslinking agent (A) The acrylate (a2) is used as a monomer unit and has a weight average molecular weight of 1,000,000 to 3,000,000. Φ 2. The adhesive optical film of claim 1, wherein the acrylic polymer contains (meth) propyl sulfonated vinegar (al) in a ratio of 30 to 90% by weight, and contains 1 〇 to 70% by weight. The proportion of % of the (meth) acrylate (a2) having a ring structure is used as a monomer unit. 3. The adhesive optical film according to claim 2, wherein the acrylic polymer further contains, in addition to the above (al) component and (a2) component, a monomer (a3) in a proportion of 10% by weight or less as a monomer SH. Early in the morning. Φ 4. The adhesive optical film of claim 1, wherein the (fluorenyl) acrylate (a2) having a cyclic structure has an aromatic ring structure * (meth) acrylate vinegar. 5. The adhesive optical film according to claim 1, wherein the acrylic polymer has a weight average molecular weight of from 10,000 to 3,000,000, and a molecular weight of 100,000 or less is 15% by area or less. 6. The adhesive optical film of claim 1, wherein the adhesive contains a decane coupling agent. The adhesive optical film of claim 1, wherein the adhesive layer is provided on the discotic liquid crystal layer via the undercoat layer. 8. The adhesive optical film of claim 7, wherein the undercoat layer is formed of a polyethyleneimine-based material. 9. The adhesive optical film of claim 1, wherein the transparent substrate film of the optical film has a polarizing element laminated on one side of the side on which the discotic liquid crystal layer is not formed. An image display device according to any one of claims 1 to 9, wherein the adhesive type optical film according to any one of claims 1 to 9 is used. 12742I.doc