TW200935101A - Multilayer optical film and method for producing the same - Google Patents

Abstract

Disclosed is a multilayer optical film which is excellent in transmittance and degree of polarization, and is prevented from entry of foreign matters between a polarizer and an optical compensation film. Also disclosed is a method for producing such a multilayer optical film. Specifically disclosed is a multilayer optical film comprising, in the following order, a long polarizer having an absorption axis in the longitudinal direction, a long optical compensation film having an indicatrix satisfying nx > ny = nz, and an optical compensation layer having an indicatrix satisfying nx = ny > nz. In this multilayer optical film, the anglebetween the slow axis of the optical compensation film and the absorption axis of the polarizer is 5-85 DEG .

Description

200935101 IX. DESCRIPTION OF THE INVENTION: TECHNICAL FIELD The present invention relates to a laminated optical film and a method of manufacturing the same. More specifically, the present invention relates to a laminated optical film for image display cracking of a liquid crystal display device or the like and a method of manufacturing the same. [Prior Art] A liquid crystal display device is indispensable for forming due to its image forming method.

A polarizing element is disposed on both sides of the glass substrate on the surface of the liquid crystal panel. Further, in order to optically compensate the liquid crystal panel, an optical compensation film is also disposed between the polarizing element and the glass substrate. Therefore, a laminated optical film in which a polarizing element and an optical compensation film are laminated in advance is used. In addition, a laminated optical film having an (ellipsoidal) circular polarization function in which the absorption axis of the polarizing element and the slow axis of the optical compensation film form a specific angle in the in-plane direction to increase the brightness of the liquid crystal panel is used. So-called (elliptical) circular polarizing plates, etc. When the (elliptical) circularly polarizing plate is produced, for example, the polarizing element and the optical compensation film are arranged and cut by a specific angle between the absorption axis of the polarizing element and the slow axis of the optical compensation film, respectively. ,fit. However, since the polarizing element itself has no stickiness, there is a problem that the bonding of the polarizing element and the optical compensation can not be easily performed. Therefore, for example, a protective film formed of a transparent resin film or the like is bonded to both surfaces of a polarizing member to form a polarizing plate, and the polarizing element is bonded to the optical decorative film (see, for example, the patent document). In this case, there is a step of separately applying the polarizing plate to the optical complement (4) or (4) (the step of bonding the optical element and the protective medium, and the step of accumulating the film on the polarizing plate = I35902.doc 200935101, foreign matter) The possibility of being mixed between the layers is increased. Therefore, there is a problem that the foreign matter to be mixed is caused to cause a defect, or the transmittance and the degree of polarization are deteriorated. [Patent Document 1] Japanese Patent Laid-Open Publication No. 2005-140980 [Problems to be Solved by the Invention] The present invention has been made to solve the above problems, and its main object is to provide a laminate capable of preventing foreign matter from entering between a polarizing element and an optical compensation film and having excellent transmittance and polarization. [Means for Solving the Problem] [Technical Solution to Problem] The laminated optical film of the present invention is provided with a polarizing element having a long shape and an absorption axis in the longitudinal direction, and a refractive index. The strip has an optical compensation layer of a strip-shaped optical compensation film having a relationship of nx > ny ^ π, an index ellipsoid having an relationship of nx = ny > nz, and a slow axis of the optical compensation film and an absorption axis of the polarizing element The angle of formation is 5 to 8 5. The preferred embodiment is that the Nz coefficient of the optical compensation film is 〇·9 to 2.0. In a preferred embodiment, the optical compensation film of the laminated optical film is obliquely extended. In a preferred embodiment, the optical compensation layer is a cholesterol alignment cured layer. In a preferred embodiment, the adhesive layer is provided between the polarizing element and the optical compensation mold, and the adhesive layer is provided. It is formed from a coating composition containing a polyvinyl alcohol-based resin, a crosslinking agent, and a metal compound colloid having an average particle diameter of 1 to 100 nm. In a preferred embodiment, the laminated optical film system is formed. According to another aspect of the present invention, a method for manufacturing a laminated optical film can be provided. The method for manufacturing a laminated optical film has a refractive index of one side in the longitudinal direction. The ellipsoid has nx> ng A long optical compensation film having a relationship of nz and a polarizing element having an elongated shape and having an absorption axis in the longitudinal direction are arranged such that the longitudinal direction of the optical compensation yoke coincides with the longitudinal direction of the polarizing element. a step of laminating the polarizing element on one side of the optical compensation film by an adhesive composition to form a laminated body; and an optical compensation layer having an nx=ny>nZi relationship in an optical compensation film side laminated refractive index ellipsoid of the laminated body The method of manufacturing the two-layer optical film is to laminate the film by the slow drawing of the optical compensation film and the absorption axis of the polarizing element to form an angle of 5 to 85. The laminated optical of the present invention according to another embodiment a method for producing a film, comprising the step of forming a layered body by a unilateral laminated index ellipsoid having a relationship of a refractive index ellipsoid having a relationship of nx> ng^ anus; - the polarizing element that transports the laminated body and the elongated shape and has an absorption axis in the longitudinal direction in the longitudinal direction, and the second surface: the surface of the optical compensation film and the polarizing element a method of length #°, a step of laminating the polarizing element on the side of the optical layer via the adhesive composition; (4) a method of manufacturing the laminated optical film, wherein the slow axis of the optical compensation film and the absorption of the polarizing element The shaft is again 5 to 85. The way is to layer. In a preferred embodiment, the method for producing a laminated optical film further comprises the steps of: trimming or punching the laminated body after laminating the polarizing element, the optical compensation medium, and the 135902.doc 200935101 optical compensation layer; step. In a preferred embodiment, the adhesive composition contains a polyvinyl alcohol-based resin, a crosslinking agent, and a metal compound colloid having an average particle diameter of 丨~(10)(10). According to another aspect of the present invention, a laminated optical film can be provided. This laminated optical film is produced by the above production method. • A liquid crystal display device can be provided in accordance with another aspect of the present invention. The - & crystal display device is a liquid crystal display device in which the laminated optical film is disposed on both sides of a liquid crystal cell, and the laminated optical film is obtained from the same film roll. [Effects of the Invention] According to the present invention, it is possible to provide a laminated optical film which is capable of preventing foreign matter from being mixed between a polarizing element and an optical compensation film, and having excellent transmittance and polarization degree, and a method for producing the same, by using a long optical compensation film . Further, the laminated optical film of the present invention can contribute to the improvement of the contrast of the obtained liquid crystal display device. [Embodiment] Hereinafter, preferred embodiments of the present invention will be described, but the present invention is not limited to the embodiments. (Definition of terms and symbols) 'The definitions of terms and symbols in this manual are as follows. - (1) Refractive index (nx, ny, nz) The refractive index of the "nx" plane in which the refractive index reaches the maximum direction (ie, the slow axis direction), and "ny" is orthogonal to the slow axis in the plane. The refractive index in the direction, "nz" is the refractive index in the thickness direction. (2) In-plane phase difference (Re) 135902.doc 200935101 In-plane phase difference (Re) ' means the in-plane phase difference of layer (film) at wavelength 590 urn unless otherwise specified value. When the thick sound of the layer (film) is d (nm), Re can be obtained from Re = (nx_ny) xd. Further, in the present specification, 'represented as Re (5 5 0)' means the in-plane phase difference of the layer (film) at a wavelength of 55 〇 nm. ' (3) Phase difference in thickness direction (Rth) • Phase difference in thickness direction (Rth) ' refers to 23. (:, unless otherwise specified, the phase difference in the thickness direction of the layer (film) at a wavelength of 59 〇 nm. When the thickness of the layer (film) is d (nm), 'according to Rth=(nx_nz) Xd to find

Rth. In the present specification, when it is represented by Rth (55 Å), it means a phase difference in the thickness direction of the layer (film) at a wavelength of 550 nm. (4) Nz coefficient

The Nz coefficient can be obtained from Nz = Rth / Re. (5) The "λ/4 plate" of the λ/4 plate refers to the φ € sub-optical birefringent plate that acts to rotate the polarizing surface of the beam, and has a linear polarized light that vibrates in a right angle direction. The function of generating a 1/4 wavelength optical path difference. In other words, it means that the phase between the normal light component and the abnormal light component is shifted by four times, and the circularly polarized light is converted into planar polarized light (or the planar polarized light is converted into circularly polarized light). . (6) λ/2 plate "λ/2 plate" refers to an electro-optical birefringent plate that acts to rotate the polarizing surface of the beam, and has a linear 1/2 of a linearly polarized light that vibrates in a right angle direction. The function of the optical path difference of the wavelength. In other words, it means that the phase of the normal light 135902.doc 200935101 line component and the abnormal light component is shifted by two points. A. Overall configuration of laminated optical film Fig. 1 is a schematic cross-sectional view showing a laminated optical film of a preferred embodiment of the present invention. The laminated optical film ί sequentially includes a polarizing element u, an optical compensation film η, and an optical compensation layer 13. The laminated optical film includes an adhesive layer 14 between the polarizing element 11 and the optical compensation film 12, and a protective film 15 on the side opposite to the optical compensation film 12 of the polarizing element. Although not shown, an adhesive layer is provided between the laminated optical film _ optical compensation film 12 and the optical compensation layer 13. The laminated optical film 1 is formed into a strip shape. In the present specification, the term "long strip" means that the length (length direction) is 1 〇 times the width (width direction), and by using a long optical compensation film, a laminate having excellent transmittance and polarization can be obtained. Optical film. The better county, the gentleman & preferably, the laminated optical film of the present invention is made into a consumption. As shown in the example, when the optical film does not have a protective film between the polarizing element and the optical compensation film, the optical compensation film 12 can also function as a protective film. By making the above-described configuration, it is possible to make the product thinner. Although not shown, the laminated optical film of the present invention may be provided with other optical compensation components as needed. Fig. 2 is an exploded perspective view showing the optical axis of the polarizing element-like optical compensation film 12 constituting the laminated optical unit 1 shown in Fig. 1 (the adhesive layer u and the protective film 15 are not shown). The polarizing element 11 is in the form of a strip 1 having an absorption axis VIII of the absorbing element U in the longitudinal direction and an angle α of the optical compensation film 12 of 5 to 8 5 . . The angle α can be set to any appropriate value according to the optical compensation film light 135902.doc 200935101 or the like within the ring circle + 24 circumference. For example, when the optical compensation film functions as a λ/4 plate, the angle α is preferably 43 〇 to 47 〇. The better is 44.0~46.G. Especially good is 44 5~45 5. . When the optical compensation film can function as a/2-plate, the angle α is preferably 13 〇 to 17 〇. More preferably, 14·0 l6.G, especially good is 14.5~15.5. . When the optical compensation film functions as a λ/2 plate, it is preferable that the laminated optical film is provided on the opposite side of the optical compensation film from the polarizing element, and further has an optical compensation element capable of functioning as a /4 plate. The angle between the slow axis of the optical compensation element and the absorption axis of the polarizing element (clockwise) is preferably 73_0 to 77.0. More preferably, 74〇~ 76.0° ‘especially good is 74.5~75.5. . By forming the above configuration, the circularly polarized light function in a wide wavelength range can be emitted. Further, in Fig. 2, the angle α is defined as a clockwise direction with respect to the absorption axis ,, but may be defined as a counterclockwise direction. Further, as described below, the in-plane phase difference Re of the optical compensation layer 13 is less than 1 〇 nm ', and does not have a substantial slow axis in the plane. A-1. Polarizing element φ As the above-mentioned polarizing element 11, any appropriate polarizing element can be employed depending on the purpose. For example, a dichroic substance such as iodine or a dichroic dye is adsorbed on a polyvinyl alcohol-based film, a partially acetalized polyvinyl alcohol-based film, or a partially saponified film such as an ethylene-vinyl acetate copolymer-based saponified film. On the polymer film, a uniaxially stretched one is obtained, and a polyene-based alignment film such as a dehydrated material of polyvinyl alcohol or a degassed hydrogen-treated product of polyethylene gas is used. In the above, it is preferable that the polarizing element which adsorbs the iodine or the like-colored substance on the polyvinyl alcohol-based film and uniaxially stretches the lens. The thickness of the polarizing elements is not particularly limited 'generally about 8 〇 μηι. 135902.doc -12· 200935101 —2 Å A polarizing element which is attached to a polyvinyl alcohol film and then uniaxially stretched, for example, can be produced by immersing polyethylene glycol in a crucible 'Staining' in an aqueous solution and extending it to 3 to 7 times the original length. If necessary, it may also contain rotten acid or zinc sulfate, gasification, etc., or may be impregnated with an aqueous solution of 7 moths. Further, if necessary, the polyvinyl alcohol-based film may be impregnated in water and washed with water. • By washing the polyethylene glycol hydrazine, it not only cleans the surface of the polyethylene glycol enamel and the anti-caking agent, but also prevents the uneven dyeing unevenness by expanding the polyvinyl alcohol film. The effect of the sentence. It can be extended after dyeing with enamel, or extended while dyeing, or it can be dyed with iodine after stretching. It may also be extended in an aqueous solution or a water bath such as boric acid or potassium iodide. Α_2. Optical compensation film In one embodiment, the optical compensation film 12 has an index ellipsoid of nx >nygnz. Here, "ny=nz" includes not only the case where 叮 is strictly equal to (10) but also the case where η·ηζ is substantially equal. Specifically, the chemical coefficient (Rth/Re) may be 0.9 to la. The in-plane retardation Re of the optical compensation film is preferably = 80 to 300 ηπ^ As described above, the optical compensation film can exhibit the work of λ/4 plate. When Re, the Re is preferably 80 to 19 〇 nm. The optical compensation film can play the role of the board. At this time, ^ is better 200~30〇 nm. The Νζ coefficient (Rth/Re) is preferably 疋0.9~2.0, more preferably 1 2~2 〇, especially preferably 丨4~丨8. An optical compensation film having an index ellipsoid of nx > nygnz can be formed using any suitable material. As a specific example, a molecular film which has been subjected to elongation treatment can be mentioned. As the resin for forming the polymer film, any suitable resin of 135902.doc 200935101 can be used. Preferably, the optical compensation film contains a group selected from the group consisting of a norbornene-based tree, a cellulose-based resin, a polycarbonate, and a polyester resin. At least one thermoplastic resin in the group. The norbornene-based resin is a resin obtained by polymerizing a norbornene-based monomer as a polymerization unit. As the rare form of the norbornene, examples of norbornene and its alkyl and/or alkylene substituents include, for example, fluorenyl-2·norbornene and 5didecyl_2_ Borneene, 5-ethylidene-free ❿ ❷ thin, 5-butyl-2-norborn, 5_ethylene-2_norborn, etc., substitutes of polar groups such as these Dicyclopentadiene, 2,3-dihydrodicyclopentadiene, etc.;] methyl octahydronaphthalene, alkyl and/or alkylene substituents thereof, and substituents such as halogens, such as 6 _Methyl dimethyl bridge-1,4,4&,5,6'7'8,8^ octahydronaphthalene, 6-ethyl_14:58_dimethyl bridge-1,4,4a,5,6 ,7,8,8 a-,\ I, # > 6-δ 6 * -1,4:5,8-f ^ _1,4,consuming,5,6,7,8,83_octahydronaphthalene , 6_气_14: ,.. '一丫备-,,43,5'6'7,8'8&-octahydronaphthalene, 6-cyano-1,4:5,8_dimethyl bridge -l'4'4a,5'6'7,8,8a-/^_|^,6_ofcl^n4 _ ' '43'5,6,7,8,8 heart octahydronaphthalene, 6-decyloxy Carbonyl_1,4:5,8-dimethyl bridge-1'4'4&'5,6,7,8,8^octahydronaphthalene;etc.; cyclopentadienyl 3~4 polymer, Example 2 4 , 9:5,8-dimethyl bridge _3a,4,4a,5,8,8a,9 9a"^ _iH ^,m :u〇 6 , 9-dimethyl bridge-3a, 4, 4a, 5, 5a, 6, 9, 9a, 10, l〇a, ll, lla_+: t1H_ cyclopentaenoindene and the like. The norbornene-based resin may also be a copolymer of a norbornene monomer and another monomer. The above-mentioned polycarbonate resin, preferably aromatic agglomerated aromatic polycarbonate can be used, which can be represented by a carbonate precursor and aromatic 135902.doc -14· 200935101 The reaction of the compound is obtained. Specific examples of the carbonic acid vinegar precursor include carbon cyanide chloride, diphenolic dibenzoate, diphenyl carbonate, dip-phenylene carbonate, phenyl p-tolyl carbonate, and diacetate. = vinegar, carbonated naphthalene vinegar, etc. Among these, carbon ray gas and diphenyl carbonate are preferred. Specific examples of the aromatic diphenol compound include 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, and double ( 4-hydroxyphenyl)methane, anthracene bis(4-hydroxyphenyl)ethane, 2,2 bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxy-3,5-dimethyl Phenyl) butane, 2,2-bis(4-hydroxy-3,5-dipropylphenyl)propane, 〖, ^ double. Hydroxyphenyl) Cyclohexanide, 1,1 bis(4-phenylphenyl)_3,3,5-trimethylcyclohexene, and the like. These may be used singly or in combination of two or more. Preferred are 2,2•bis(4-hydroxyphenyl)propane, 1,1-bis(4-hydroxyphenyl)cyclohexane, la-gastric (4-hydroxyphenyl)-3,3,5 - dimethylcyclohexane. It is particularly preferred to use 2,2-bis(4-cysylphenyl)propane in combination with 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane. As the cellulose resin, a cellulose ester is preferably used. As the cellulose ester, any appropriate cellulose ester can be employed. Specific examples thereof include organic acid esters such as cellulose acetate, cellulose propionate, and cellulose butyrate. Further, the cellulose ester may be, for example, a mixed organic acid ester in which a part of the hydroxyl group of cellulose is substituted with an ethyl fluorenyl group and a propyl fluorenyl group. The cellulose vinegar can be produced, for example, by the method described in JP-A-2002-188128 [0.040] to [0041]. The weight average molecular weight (Mw) of the above cellulose vinegar measured by a gel permeation chromatography (GPC) method using a tetrahydrofuran solvent, preferably 3 Å, 〇〇〇 5 〇〇〇〇 Hey, the better is 135902.doc 200935101 50'00〇~4〇〇, hey, especially good is the range of 8〇〇〇〇~3〇〇〇〇〇. When the weight average molecular weight is within the above range, the mechanical strength is excellent, and the workability of solubility, moldability, and casting is good. β As the polyester resin, for example, polyethylene terephthalate is exemplified. (PET, polyethylene terephthalate), PBT' polybutylene terephthalate, and the like. As a method of forming the above resin into a film shape, any appropriate method can be employed. For example, a hot melt molding method, a solution casting method, and the like can be mentioned. A hot melt forming method is preferred. Specific examples of the heat-melt molding method include a melt extrusion molding method, an extrusion molding method, an aeration method, an injection molding method, a blow molding method, and an extension molding method. Of these, smelting extrusion molding is preferred. The reason for this is that an excellent extender such as mechanical strength and surface precision can be obtained. The molding conditions can be appropriately selected depending on the purpose of use, the molding method, and the like. In the melt extrusion molding method, the temperature of the cylinder is preferably ._ C 'more preferably i50 to 35 (rc. The thickness of the upper molecular film (unstretched film) can be determined according to the required optical characteristics, Extension processing, etc., depends on any suitable value of 1 ft. It is better to use 10~3〇〇μηι, and better 3 〇~2 延伸 之 extension processing can be obtained.../The reason is that it can be stabilized J is a uniform stretch film. The above-mentioned stretching treatment can be carried out as long as it can be suitably stretched, and the elongation ratio can be used (for example, the elongation temperature and the extension direction). An optical compensation film having the above-described desired I-square de-extension, extension condition, phase in the thickness direction, for example, an index ellipsoid, and an in-phase phase difference is obtained by a method of selecting an extension method. The stretching method is preferably 135902.doc 200935101. The method of continuously extending the above-mentioned unstretched crucible in the direction of the angle θ with respect to the width direction thereof is exemplified. By adopting this method, a long stripe extending flag having an alignment axis (slow axis) at an angle β to the width direction of the film can be obtained, so that the following lamination method can be performed (for example, continuous reel type (R〇n_t〇_Rol) 〗)). As a result, it is possible to obtain a laminated optical film which is capable of preventing foreign matter from being mixed between the polarizing element and the optical compensation film and having excellent transmittance and polarization. The above angle Θ can be set to any appropriate value depending on the purpose. Representative example " is 5~85. . Within this range, the angle θ can be set to any appropriate value depending on the desired optical characteristics and the like. For example, when the optical compensation film can exert the force of the plate, the angle θ is preferably 43.0 to 47.0. It is better that 44.0 46.0 ' is especially good 44 5~45·5. . When the optical compensation mode can function as a λ/2 plate, the angle 0 is preferably 73.0 to 77.0. The better is 74.0 : 6. 〇 ‘ Especially good is 74_5~75 5. . The method of obliquely extending is not particularly limited as long as it is continuously stretched in a direction perpendicular to the width direction of the stretched film to tilt the alignment axis of the polymer to a desired angle. method. The stretching machine for obliquely extending can be exemplified by a tenter type stretching machine which can apply a conveying force or a stretching force or a pulling force at different speeds in the lateral direction and/or the longitudinal direction. As the pull-type stretching machine, there are a lateral single-axis stretching machine, a simultaneous double-axis stretching machine, etc., and if the long strip-shaped film is continuously subjected to the oblique stretching process, any appropriate stretching machine can be employed. One example of the above-described oblique tenter extension is shown in FIG. As shown in Fig. 3, the unstretched film is conveyed in the solid & direction (e.g., the longitudinal direction) 21, and the left and right pullers 31 and 31 are used to perform oblique extension. The film 135902.doc 200935101 12a clamped at a specific position "42 can be tilted and extended by moving the left side at a speed 52L toward the position 51l and the right side at a speed 52R toward the position 5 1R (in the example, the speed 5 2L < speed 52R), and a strip-like stretch film 12 is obtained. The speed ratio (speed difference) of the left and right tenter can be set to any appropriate value in accordance with the above-mentioned required angle θ. A representative example is 1 to 50%. Further, Fig. 3 is an example in which the width direction χ is inclined at an angle 逆 in the counterclockwise direction, and the alignment axis (slow axis) may be in the β direction.

In addition to the above, Japanese Laid-Open Patent Publication No. 5-83482, Japanese Patent Laid-Open No. Hei 2-3920, Japanese Special (4) Kaiping 3_Help Bulletin, Japanese Special Materials _〇〇 The method described in Japanese Laid-Open Patent Publication No. Hei. No. 2002-22944, and the like. Z, the glass transition temperature of the resin forming the polymer 貘 (unstretched film) is g, and the temperature at the time of the oblique extension is preferably 〜〜U 'better ^g_1 (rC~Tg+5 (TC. The extension ratio generation: 1 to 3 times, preferably "HO times, more preferably 1·〇1 to 5 times. The thickness of the medium obtained by oblique extension represents the axis, preferably 3〇 ~~, more preferably 30~45_. Α-3. Optical compensation layer "=y optical compensation layer 13 has an index ellipsoid of η-. Here, ηΧ~ strict (4) (4), including nx and By setting | the case of a person. Specifically, Re means less than 10 (10). By virtue of the optical compensation layer having such optical characteristics, the contrast of the obtained liquid crystal display device of 135902.doc 200935101 can be improved. Optical compensation layer 13 The phase difference Rth in the thickness direction can be set to any appropriate value. Preferably, it is 25 to 3 Å, more preferably 50 to 270 nm, and particularly preferably 75 to 250 nm. The above characteristics may be formed by any suitable material. As a specific example of the optical compensation layer, cholesterol may be cited. The "cholesterol alignment solidified layer" refers to a layer in which the constituent molecules of the layer have a helical structure, and the helical axis thereof is aligned substantially perpendicular to the plane direction, and the alignment state thereof is fixed. Therefore, the "cholesterol alignment solidified layer" J includes not only a case where a liquid crystal compound exhibits a cholesteric liquid crystal phase, but also a case where a non-liquid crystal compound has a virtual structure of a cholesteric liquid crystal phase. For example, a "cholesterol alignment solidified layer" can be formed by displaying a liquid crystal phase in a liquid crystal material. In this state, it is twisted by an optical rotatory agent to be aligned to a cholesterol structure (helical structure), and in this state, a polymerization treatment or a crosslinking treatment is carried out to thereby fix the alignment (cholesterol structure) of the liquid crystal material. Specific examples of the alignment-cured layer include a cholesterol layer described in JP-A-2003-287623. The thickness of the optical compensation layer can be set to any appropriate value as long as the desired optical characteristics are obtained. When the above optical compensation layer is a cholesterol alignment solidified layer, the thickness is better. It is 0.5 to 10 μηη, more preferably 〇5 to 8 Pm', particularly preferably 〇5 to 5 μηη. As another specific example of the material for forming the optical compensation layer 13, a non-liquid crystal material can be cited. Preferably, it is a non-liquid crystalline polymer. Such a non-liquid crystal material differs from a liquid crystal material in that, irrespective of the alignment property of the substrate, an optical uniaxiality exhibiting nx=ny>nz can be formed according to its own property 135902.doc -19- 200935101 Membrane. As a non-liquid crystal material, for example, heat resistance, chemical and chemical properties, and transparency are excellent in terms of rigidity, and it is preferably a polyamine, a polyamine, a polyamine, or a polyamide. Polymers such as polyamidoximine and polyacetamide. These polymers may be used in the form of Im, and may be used alone or in combination, for example, a mixture of two or more kinds having different functional groups may be used as in the case of a mixture of polyarylene ether and polyamine. Among such polymers, polyylidene is particularly preferable in terms of high transparency, high alignment, and high elongation. Specific examples of the above-mentioned polyacrylonitrile and a specific example of the method for forming the optical compensation layer include a polymer and an optical compensation method described in Japanese Patent Laid-Open Publication No. Hei.

φ The thickness of the optical compensation layer can be set to any appropriate value as long as the above-mentioned desired optical characteristics are obtained. When the optical compensation layer u is formed of a non-liquid crystal material, it is preferably 0.5 to 1 Å μηη, more preferably 〇 5 to 8 Å, particularly preferably 0.5 to 5 μηι. Α-4. Adhesive layer As the adhesive for forming the above-mentioned adhesive layer 14, any appropriate subsequent agent and σ can be used. Preferably, the adhesive layer! 4 is formed of an adhesive composition containing a polyvinyl alcohol-based resin, a crosslinking agent, and a metal compound colloid having an average particle diameter of nm. Examples of the polyvinyl alcohol-based resin include a polyvinyl alcohol resin and a polyvinyl alcohol resin containing an ethyl acetonitrile group. Preferred is a polyvinyl alcohol resin containing an ethyl acetonitrile group. The reason for this is that durability can be improved. Examples of the polyvinyl alcohol-based resin include a polyvinyl acetate compound, a derivative of the compound, and a saponified product of a copolymer of ethylene acetate and a monomer having a copolymerization of 135,902.doc -20 to 200935101. A modified polyvinyl alcohol obtained by acetalizing, urethane, etherifying, grafting, or phosphating a polyvinyl alcohol. Examples of the monomer include unsaturated carboxylic acids such as maleic acid (anhydride), fumaric acid, crotonic acid, itaconic acid, and (meth)acrylic acid, and esters thereof; ethylene and propylene. And other α-olefins; (meth)allylsulfonic acid (sodium), (succinic acid monoalkyl ester) sodium sulfonate, (alkyl maleate) sodium disulfonate, ' Ν - mercapto acrylamide, acrylamide sulfonyl sulfonate alkali metal salt, hydrazine-vinyl D bis-alkanone, hydrazine-vinyl pyrrolidone derivative, and the like. These resins can be used alone or in combination of two or more. In terms of adhesion, the average degree of polymerization of the above polyvinyl alcohol-based resin is preferably from about 100 to 5,000, more preferably from 1 to 400 (in terms of adhesion), the average degree of saponification is good. It is about 85 to 100 mol%, and more preferably 90 to 1 mol. /〇. The above polyvinyl alcohol-based resin containing ethyl acetate can be made, for example, by using a 4-way method. The reaction of the dilute alcohol resin with diethyl hydrazine is carried out. ❹ Specific examples thereof include a method of adding diketene to a dispersion obtained by dispersing polyethylene (10) and a resin in a solvent such as acetic acid; a method of adding a ketene to a liquid obtained by dissolving a polyethylidene alcohol-based resin in a solvent such as a di-f-based arylamine or a diterpene; or a diketene gas or a liquid di- ketene and a polyvinyl alcohol A method in which the resin is directly contacted. A representative example of the degree of modification of the ethyl hydrazide group of the polyvinyl alcohol-based resin of the acetonitrile-based group is (MM% or more), preferably 〇 扣 莫 耳 % left Good is Bu (four), especially good 2% to 7 mol%. If it is not full, then, there is insufficient water resistance. Yu. 4〇 exceeds mole%, the resistance I35902.doc 21 200935101

The water-based lifting effect is small. Further, the degree of modification of the ethyl group is determined by nMR (nuclear magnetic resonance). As the above crosslinking agent, any appropriate crosslinking agent can be employed. It is preferably a compound having at least two functional groups reactive with the above polyvinyl alcohol-based resin. For example, an alkylenediamine having an alkylene group and two amine groups such as ethylenediamine, triethylenediamine or hexamethylenediamine; toluene diisocyanate, 'hydrogenated toluene diisocyanate, trishydroxypropylpropane toluene diisocyanate Adduct, diphenylmethane triisocyanate, methylene bis(4-phenyldecane triisocyanate), isophorone diisocyanate, and isocyanide blocks or phenolic blocks Sour vinegar; ethylene glycol diglycidyl sulphate, polyethylene glycol diglycidyl ether, glycerol diglycidyl ether or glycerol triglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane Epoxy such as triglycidyl ether, diglycidyl aniline or diglycidylamine; mono-types such as furfural, ethylene, propylene, butyric acid; ethylene bis, propylene, succinaldehyde, pentane Awake, maleic acid, phthalic acid di(tetra); methyl ketone, 0 f-based melamine, alkylated methylol urea, alkylated methylolated melamine, acetamide, benzene Amine-formaldehyde resin such as condensate of decylamine and formaldehyde; sodium, potassium, magnesium, calcium, aluminum, iron, nickel Such as divalent metals, or trivalent gold. ^ salt and its oxides. Preferred among these are amine-based resins or bis-aldehydes. As the amino-based formaldehyde resin, a compound having a methylol group is preferred, and as the dialdehyde, glyoxal is preferred. Among them, preferred are compounds having a hydroxyindenyl group, and particularly preferred is methylol melamine. The amount of the above-mentioned crosslinking agent can be appropriately set depending on the type of the above polyvinyl alcohol-based resin and the like. The representative example is that the weight of the polyvinyl alcohol-based resin is 135,902.doc -22- 200935101 and is 1 〇~6 〇 · χ χ χ χ χ χ χ χ χ χ χ χ χ χ χ χ χ χ χ . The reason is that the continuity can be optimized. Further, when the amount of the crosslinking agent is large, the reaction of the crosslinking agent is carried out in a short period of time to cause the subsequent (4) gelation. As a result, the usable time (applicable period) of the adhesive is extremely shortened, and it is difficult or difficult to use in the industry. The adhesive of the present embodiment contains the following metal compound colloid. Therefore, even if the amount of the parental agent is large, it can be used stably. ❹ The above-mentioned metal compound colloid may be obtained by dispersing metal compound fine particles in a knife-dissolving medium, and the rabbit side* i 7 may be electrostatically stabilized due to mutual repulsion of the same kind of charges of the microparticles t, thereby having continuous stability. By. The average particle diameter of the fine particles forming the metal compound colloid may be any appropriate value as long as it does not adversely affect the optical characteristics such as polarization characteristics. Preferably, Lnm' is (4) (10). The reason for this is that the fine particles can be uniformly dispersed in the adhesive layer to ensure the adhesion, and the occurrence of crack defects can be suppressed. Further, the term "cracking defect" means that light leakage is described below. Any suitable compound can be employed as the above metal compound'. For example, oxides, sulphur dioxide, sulphur, sulphur, oxidized, oxidized, titanium oxide, etc., metal oxides, such as sulphuric acid, carbon _, ishixi acid, carbonate, strontium carbonate, phosphorus (tetra) ruthenium metal Salt; minerals such as Shixiazao, talc, clay, and kaolin. As described below, in the present invention, it is preferred to use a metal compound gum having danbaizhengdian as the metal compound, and examples thereof include oxidized crystals, oxidized phthalocyanines, and the like, and alumina is particularly preferable. The representative example of the colloidal metal compound described above is dispersed in a dispersion medium and is present in the form of a colloidal solution of 135902.doc -23·200935101. Examples of the dispersion medium include water and alcohol. A representative example of the solid content concentration in the colloidal solution is about 重量 咒 weight %, preferably 1 to 30% by weight. The colloidal solution may contain an acid such as nitric acid, hydrochloric acid or acetic acid as a stabilizer. The metal compound colloid (solid content) is adjusted to a volume of (4), and is 200 parts by weight or less, more preferably 10 to 200 parts by weight, based on 100 parts by weight of the polyethylene glycol resin. More preferably 20 to 175. Weight, the best is 3〇~^ Lu

Parts by weight. The reason for this is that the adhesion can be ensured, and the occurrence of crack defect can be suppressed. The adhesive composition of the present embodiment may contain a coupling agent such as a decane chelating agent or a titanium coupling agent, and various stabilizers such as a tackifier, an ultraviolet absorber, an antioxidant, a heat stabilizer, and a hydrolysis stabilizer. The form of the adhesive composition of the present embodiment is preferably a water-soluble solution). For the coating property and the stability of the placement, etc., and the Fushen "Shenji Wansuo, the resin concentration is preferably 0.1 to 15% by weight, and the better the county is 1 Λ 旦 η 丈 疋 疋 0·5~10 weight%. The viscosity of the resin solution is preferably (iv) mPaH. (IV) The adhesive composition of the present embodiment can also suppress the occurrence of crack defects in the low viscosity dry circumference of 1 to 20 mPa.s. The pH of the resin solution is preferably from 2 to 6, more preferably from 2.5 to 5', more preferably from 3 to 5, most preferably from 35 to 45. Usually, metallization: The surface charge of the colloid can be controlled by adjusting the pH. The surface charge is preferably a positive charge. By having a positive charge, J J Ai suppresses the generation of crack defects. Further, the surface charge, for example, J J fine, was confirmed by measuring the kinematic potential by a potentiodynamic measuring machine. The preparation method of the above resin solution may be any appropriate method. For example, 135902.doc -24 - 200935101, which is a method in which a polyvinyl alcohol-based resin and a crosslinking agent are mixed in advance and adjusted to an appropriate concentration, and a metal compound colloid is blended therein. Further, the polyvinyl alcohol-based resin may be mixed with the metal compound colloid, and the crosslinking agent may be mixed while considering the use time or the like. Furthermore, the concentration of the tree a solution can also be adjusted after preparing the resin solution. The thickness of the adhesive layer formed of the above adhesive composition is preferably from 10 to 300 nm, more preferably from 1 to 2 〇〇 nm, particularly preferably from 2 〇 to nm ° A-5. ❹ The protective film 15 may be formed of any suitable film of a protective layer of a polarizable polarizing element. Specific examples of the material of the main component of the film include cellulose-based resin such as acetyl cellulose (TAC), or polyvinyl acetate, polyvinyl alcohol, polycarbonate, and polyamide. A transparent resin such as polyiminoimide, polyethersulfone, polysulfone, polystyrene, polynorbornene, polyolefin, (fluorenyl) acrylic or acetate. Further, a thermosetting resin such as a (meth) propyl benzoic acid, a polyurethane vinegar, a (meth) acrylic acid urethane vinegar, an epoxy resin or a polyox epoxide, or an ultraviolet curing resin may be used. Resin, etc. Other than this, for example, a glass-based polymer such as a cerium oxide polymer can be mentioned. Further, a polymer film described in JP-A No. 01-343529 (W〇 01/37007) can also be used. As the material of the film, for example, a thermoplastic resin having a substituted or unsubstituted quinone imide group on a side bond, and a thermoplastic resin having a substituted or unsubstituted phenyl group and a nitrile group on a side bond may be used. The resin composition may, for example, be a resin composition containing a copolymer of isobutylene and N-methylmaleimide, 135902.doc •25-200935101, and an acrylonitrile-styrene copolymer. . The polymer film may be, for example, an extrusion molded product of the above resin composition. As the (meth)propionic acid-based resin, Tg (glass transition temperature) is preferably 115 ° C or higher, more preferably 120. (: Above, more preferably 125. (: The above is particularly preferably 130 ° C or more. The reason is that excellent durability is obtained. The upper limit of the Tg of the above (meth)acrylic resin is not In particular, it is preferably 17 CTC or less from the viewpoint of moldability, etc. As the above (mercapto)propionic acid-based resin, any suitable (meth)acrylic acid can be used without departing from the effects of the present invention. Examples of the resin include poly(meth)acrylate such as polymethyl methacrylate, methyl methacrylate-(mercapto)acrylic acid copolymer, and methyl methacrylate-(meth)acrylic acid vinegar copolymer. Anthracene acrylate-acrylate _(mercapto)acrylic acid copolymer, (mercapto)methyl acrylate-styrene copolymer (MS resin, etc.), a polymer having an alicyclic hydrocarbon group (for example, methyl methacrylate) - a methacrylic acid cyclohexyl copolymer, a methyl methacrylate - (mercapto) acrylic acid norbornyl ester copolymer, etc.), preferably, a poly(indenyl) acrylate such as poly(methyl) acrylate. Base ester. More preferably listed Methyl methacrylate as a main component (50 to 1 〇〇 weight 〇 / 0, preferably 7 〇 to 1 〇〇 wt%) of a fluorenyl hydrazide resin as the above (fluorenyl) acrylate Specific examples of the resin include, for example, ACRYPET VH or ACRYPET VRL20A manufactured by Mitsubishi Rayon Co., Ltd., and a ring structure having a ring structure as described in Japanese Laid-Open Patent Publication No. 2004-70296. Acrylic resin, (T-based) propylene 135902.doc -26 - 200935101 acid resin obtained by intramolecular crosslinking or intramolecular cyclization reaction. As the above (fluorenyl) acrylic resin, A (meth)acrylic resin having a lactone ring structure is particularly preferable in terms of high heat resistance, high transparency, and mechanical strength of the crucible. As the above (meth)acrylic resin having a lactone ring structure, Japanese Patent Laid-Open Publication No. 2000-230016, Japanese Patent Laid-Open Publication No. 2001-151814, Japanese Patent Laid-Open Publication No. Hei No. Hei. No. Hei. No. 2002-254544, and Japanese Patent Laid-Open Publication No. 2002-254544 Patent special (Meth)acrylic resin having a lactone ring structure described in the above-mentioned Japanese Patent Publication No. Hei. No. 146084. The mass average molecular weight of the (fluorenyl) acrylic resin having a lactone ring structure (also sometimes referred to as The weight average molecular weight is preferably from 1000 to 2,000,000, more preferably from 5000 to 1 Torr, more preferably from 10,000 to 500,000', particularly preferably from 50,000 to 500,000. The above has an internal self-twisting ring structure. The Tg (glass transition temperature) of the (meth) acrylonitrile-based resin is preferably 115 ° C or more, more preferably 125 ° C or more, more preferably 130 ° C or more, and particularly preferably 135 t: The best is 14〇t or more. The reason for this is that excellent durability can be obtained. The upper limit of the (meth)acrylic resin having a lactone ring structure is not particularly limited, and from the viewpoint of moldability and the like, it is preferably 17 Å or less. In the present specification, the term "(meth)acrylic" means acrylic acid and/or methacrylic acid. The protective film 15 is preferably transparent and has no coloration. The phase difference Rth of the thickness direction of the protective film is preferably _90 nm to +9 〇 nm 'better _8 〇 135902.doc • 27- 200935101 nm to +80 nm 'better is _7 〇 nm ~+7〇(10). The thickness of the protective film may be any appropriate thickness as long as the phase difference Rth in the above preferred thickness direction can be obtained. The representative example of the thickness of the protective film is 5 mm or less, preferably i mm or less, more preferably μ1 μm, more preferably 5 to 15 μm μπι. If necessary, the side opposite to the polarizing element of the above protective layer may be subjected to hard coating, anti-reflection treatment, anti-adhesive treatment, anti-glare treatment, and the like. > As described above, a cellulose film which can be generally used as a protective layer of a polarizing element is, for example, a triethylenesulfonyl cellulose crucible having a thickness of 8 Å and a phase difference Rth (10) nm in the thickness direction. Therefore, in order to obtain a phase difference Rth' in the smaller thickness direction, a suitable treatment for lowering Rth can be performed on the larger cellulose film. As a process for reducing the phase difference 讣 of the thickness direction described above, any appropriate processing method can be employed. For example, a base material such as polyethylene terephthalate, polypropylene, or stainless steel coated with a solvent such as cyclopentamethyl or methyl ethyl ketone may be bonded to a common cellulose film. And heating and drying (for example, heating and drying at about 80 to 150 C for about 3 to 1 minute), and then peeling off the base film; and applying a norbornene-based resin, an acrylic resin, or the like to cyclopentanyl In a solvent such as methyl ethyl ketone, the obtained solution is coated on a common cellulose film and heated and dried (for example, dried at about 80 to 1501 for about 3 to 1 minute), and then Coating film stripping method, and the like. The material constituting the cellulose-based film is preferably a fatty acid-substituted cellulose-based polymerization product such as diethyl ketone cellulose or diethyl phenyl cellulose 135902.doc -28- 200935101. The acetic acid substitution degree of the triacetonitrile cellulose used in the tenth is about 2.8. It is preferable to control the degree of substitution of acetic acid to 18 to 2.7, and it is better to control the degree of substitution of propionic acid in the 〇.!~! Thereby, the phase difference Rth in the thickness direction can be controlled to be small. By adding a plasticizer such as butyl phthalate, aniline, or triethyl citrate to the cellulose-based polymer, the phase difference Rth in the thickness direction can be controlled. Smaller. The amount of the plasticizer added is preferably 疋 40 parts by weight or less, more preferably 20 parts by weight, more preferably 15 parts by weight, based on the weight of the fatty acid-substituted cellulose-based polymer i 〇〇. The process for reducing the phase difference Rth in the thickness direction may be appropriately combined, and the phase difference Rth (550) in the thickness direction of the protective film obtained by performing such a treatment is preferably _20 nm to +20 nm. More preferably, _1 〇 nm~-^ 1 〇 nm 'better is · 6 nm to +6 nm, especially preferably -3 nm to +3 nm. The in-plane retardation Re (55 Å) of the protective film is preferably 〇 10 10 nm or less, more preferably 〇 nm or more and 6 nm or less, more preferably 0 nm or more and 3 nm or less. The thickness of the above-mentioned protective film may be any appropriate thickness as long as the phase difference Rth' in the above-mentioned preferable thickness direction can be obtained. The thickness of the above protective film is preferably from 20 to 200 μm, more preferably from 30 to 1 μm, and even more preferably from 35 to 95 μm. Α-6, Other As an adhesive forming the adhesive layer provided between the optical compensation film 12 and the optical compensation layer η, any appropriate adhesive can be employed. Better than 135902.doc -29- 200935101 It is good to use a hardening type of adhesive. Typical examples of the curing adhesive include a photocurable adhesive such as an ultraviolet curable resin, a moisture curing adhesive, and a thermosetting adhesive. Specific examples of the thermosetting type adhesive agent include thermosetting resin-based adhesives such as a ring-shaped latex resin, an isocyanate resin, and a polyimide resin. Specific examples of the moisture-curing adhesive include an isocyanate resin-based moisture-curing adhesive. Among these, a moisture-curing type adhesive (particularly an isocyanate resin-based moisture Φ 硬化 hardening type adhesive) is preferred. Since the moisture-curing adhesive is cured by reacting with moisture in the air or adsorbed water on the surface of the adherend, an active hydrogen group such as a hydroxyl group or a carboxyl group, and the like, it can be naturally left by applying an adhesive and then placing it. Hardened and excellent in workability. Further, since it is not necessary to heat for hardening, the optical compensation layer is not heated at the time of lamination. As a result, there is no need to worry about heat shrinkage. Therefore, according to the present invention, even when the optical compensation layer is extremely thin, cracking or the like at the time of lamination can be remarkably prevented. Further, the hardening type adhesive hardly expands and contracts even if it is heated after being cured. In addition, the above-mentioned so-called isocyanate resin-based adhesive agent means a general term for a polyisocyanate-based adhesive and a polyurethane resin adhesive. The upper " hardening type resin can be dissolved or dispersed in a solvent to be used as a hardened resin binder solution (or dispersion). In the preparation of the solution (or dispersion), the ratio of the solid content of the hardened resin is preferably from 2 to 65% by weight, particularly preferably from 25 to 7% by weight. The best is 30 to 50% by weight. Any suitable solvent can be used as the solvent. For example, [acid vinegar, methyl ethyl ketone, methyl isobutyl ketone, toluene, xylene, etc.). These can be used alone or in combination with two I3i902.doc 200935101 or more. The thickness of the above adhesive layer is preferably 〇"μιη~2〇(4), more preferably 0.5 μηι to 15 μιη, and most preferably 1 μΐΏ~1 () μηι. As described above, the laminated optical film of the present invention may further comprise other optical compensation elements. The optical compensation component can have any suitable optical characteristics. Examples of the form thereof include a stretch film of a polymer film, a liquid crystal coat layer, and the like. The <resin forming a polymer film' is, for example, a polycarbonate-based resin or a norbornene-based resin. As the stretching method, uniaxial stretching and biaxial stretching can be cited. By providing other optical compensating elements, for example, the above optical compensation enthalpy can be obtained, and the circular polarizing function can be exerted in a wide wavelength range.制造 Manufacturing method The method for producing a laminated optical film of the present invention has a step of conveying a long optical compensation film having a relationship of nx > ny η ζ in the longitudinal direction of the refractive index ellipsoid and The polarizing element is provided on the early side of the optical compensation film via the adhesive composition in such a manner that the longitudinal direction of the optical compensation film is opposite to the longitudinal direction of the polarizing element φ. By laminating the polarizing element & optical compensation film on one side, it is possible to prevent foreign matter from being mixed between the polarizing device and the optical compensation film, and it is excellent in transmittance and polarization. Laminated optical film. The elongated polarizing element is preferably formed into a roll shape. The long strip optical compensation 臈 is preferably made into a roll shape. The above-mentioned polarized light 7L and the optical compensation film are laminated by the adhesive composition. Specifically, the method may be as follows: after the single-coating adhesive composition of the polarizing element or the light compensation film, the polarizing element 135902.doc -31 - 200935101 is attached to the optical compensation film. Combine and dry. As the adhesive composition, a suitable adhesive composition can be used. It is preferred to use the adhesive composition described in the above item (4). The coating method of the adhesive composition may, for example, be a co-coating method, a spray method, a dipping method or the like. Further, it is preferred to apply the coating so that the thickness after drying is larger than the average particle diameter of the colloid of the above metal compound. Representative examples are from 1 〇 to 300 nm, preferably from 10 to 2 nm, more preferably from 2 〇 to 15 〇 nm. A sufficient adhesion can be obtained by coating the above thickness 疋 ❿ 。. A typical example of the drying temperature is 5 to 15 (TC, preferably 30 to 12 (TC. The representative example of the drying time is 12 sec. or more, more than 300 sec. The above polarizing element and the optical compensation film are optical. The angle between the slow axis of the compensation film and the absorption axis of the polarizing element is 5 to 85. As described above, when the optical compensation film can function as a λ/4 plate, it is preferably 43_0 to 47_0°. The better is 44. 〇 ~ 46 〇., especially good is material 2. 45.5. When the optical compensation film can play the function of λ/2 plate, it is better to be ~ 17.0 °, more preferably ΐ 4 〇~16.〇, particularly preferably 14$~丨5 5. The method for producing a laminated optical film of the present invention further has the following steps: on the other side of the optical compensation film (the polarizing element is not disposed) The optical compensation layer having the relationship of nx=ny> nz on the side of the laminated index ellipsoid. A representative example is a state in which an optical compensation layer is formed on a substrate in advance to form a laminated body. Compensation layer. In this case, the optical compensation layer on the substrate is transferred from the substrate. To the optical compensation film, the compensation 臈 and the optical compensation layer are typically formed by laminating Y as the adhesive. Any suitable adhesive can be used. It is preferred to use 135902.doc • 32- 200935101 The adhesive agent described in item -6. The agent (the adhesive solution or dispersion it can be appropriately set according to the purpose. The coating amount is relative to the #bit area (em2) of the light compensation layer, preferably Q3 to 3 (6) More preferably, it is particularly preferable that the thickness of the adhesive layer is adjusted to be as described above to satisfy the thickness of the above-mentioned adhesive layer. Further, the adhesive is volatilized by the package. (4) Further, the method for producing a laminated optical film of the invention may further include a step of laminating a long strip of protective medium on the side opposite to the polarizing element compensation film. The method of: "speaking": separately carrying polarized light in the longitudinal direction The element and the protective film '-surface are laminated such that the longitudinal direction of the polarizing element coincides with the longitudinal direction of the protective film. The long protective film is preferably formed into a roll Μ 70# and (4) film by any appropriate Adhesive layer In forming the adhesive layer, it is preferred to use the adhesive composition described in the above-mentioned seven. The one of the examples of the method for producing the laminated optical yoke of the present invention is shown in Fig. 4. As shown in FIG. 4, the laminated body 110 in which the protective film 15 is laminated on the polarizing element u, and the optical compensation film !2 coated with the above-mentioned adhesive composition (not shown) are sent in the direction of the arrow so that each The shape in which the length direction is uniform is the same as that of the light-receiving film 12 by the continuous reel type, and the laminated body L is obtained in FIG. 4, and the symbols U1 and 112 represent the volume. A roller which forms a film of each layer, and reference numeral 113 denotes a guide roller for bonding the films to each other. Other steps in an example of the method for producing a laminated optical film of the present invention I35902.doc -33· 200935101

5(a) and 5(b). As shown in Fig. 5 (a), the laminated body i2 (the protective film 15, the laminated body of the polarizing element 11 and the optical compensation film 12) and the laminated body 121 formed by coating the optical compensation layer 13 on the substrate 13a are provided. The adhesives are conveyed in the direction of the arrow in the state in which the respective longitudinal directions are aligned, and are bonded together by the above-mentioned adhesive (not shown). By laminating the optical compensation layer and the optical compensation film, it is possible to provide a laminated optical film which is capable of preventing foreign matter from being mixed between the optical compensation layer and the optical compensation film and having excellent transmittance and polarization. Finally, the substrate 13a is peeled off from the laminated body 130 to be bonded in the manner shown in Fig. 5(b). Further, in Fig. 5 (the symbol I" and 115 in the phantom, the roller which forms the film of each layer is not shown, and the reference numeral 116 denotes a guide roller for bonding the films to each other. In the above embodiment, the laminated polarizing element 11 is After the optical compensation film 12 is laminated, the optical compensation layer 13 is laminated. However, the optical compensation film 12 and the optical compensation layer 13 may be laminated, and then the polarizing element u may be laminated. The manufacturing method of the laminated optical film of the present month preferably has the following Step. After laminating the polarizing element, the optical compensation film, and the optical compensation layer, the laminated body # is cut or punched. When the protective film is laminated, the protective film and the laminated body are preferably cut and cut. Or blanking. Any suitable method can be used for cutting or punching. The laminated optical film obtained by cutting or punching may of course not be elongated. When the layer optical device further has other optical compensation components, it may be through any suitable adhesive. A liquid crystal display device V is preliminarily added to the liquid crystal display station of the present invention. The above-mentioned laminated optical film is included in the present invention. 135902.doc -34· 200935101 of the present invention. In the liquid crystal display device of the present invention, the laminated optical film is disposed so as to be in contact with the liquid crystal cell so that the liquid crystal display is placed on the liquid crystal display device. The optical enthalpy on both sides is preferably obtained by the phase film roll. By arranging the laminated optical film obtained by the same film roll on both sides of the liquid crystal cell, the axial shift can be suppressed. The 曰 display device may be a transmissive type that sees the S-plane from the back surface of the 9-crystal panel, or may be a reflection type that illuminates the visual side of the liquid crystal panel to view the kneading surface. Alternatively, the liquid crystal display device may be The liquid crystal display device of the present invention can be used for any suitable application. The use of the liquid crystal display device is not particularly limited. Specifically, it can be applied to a personal computer screen.笔记A (〇ffice aut_ti〇n, office automation) machine, mobile phone, clock, digital camera, portable information terminal (PD) A (personal digital assistant, pers〇nai dighal • assistant)), mobile games and other mobile devices; cameras, LCD TVs, microwave ovens and other household appliances; rear monitors, car navigation system monitors, car audio and other vehicle-mounted devices; A display device such as a monitor for a commercial store, a guard device such as a monitor monitor, a care monitor, a medical monitor, etc., a medical device, etc. Hereinafter, the present invention will be specifically described by way of examples, but the present invention The method of measuring the phase difference between the optical compensation film and the optical compensation layer is as follows. (Measurement of phase difference value) I35902.doc -35- 200935101 Automatic use of K0BRA_WPR manufactured by Ojika Measurement measuring. The measurement wavelength was 590 nm and the measurement temperature was 23. (Example 1) (Production of polarizing element) A long-length polyvinyl alcohol film was dyed in an aqueous solution containing iodine, and then uniaxially stretched between rolls having different speed ratios in an aqueous solution containing boric acid. Up to 6 times, and obtain a long strip-shaped polarizer having an absorption axis in the longitudinal direction

Pieces. After extending the elongated polarizing element, it is wound up to form a wound body. (Production of optical compensation film) For norbornene-based resin (average molecular weight: 35, 〇〇〇, Tg: 14 〇. 〇 is subjected to melt extrusion molding, and the obtained unstretched film (thickness: 丨 (9) (four) lost: pulled In the web extender, 'heated to 15 〇..--the surface conveys the film in the longitudinal direction, and the left and right stretcher speed ratio (speed difference) is adjusted to 50. /. while filming in the transverse direction of the film 15] The transport direction is extended to obtain a long strip-shaped optical compensation film (stretching film) having a thickness of 40 μm. A clockwise 45 in the longitudinal direction is obtained in the above manner, and a long optical compensation mode having a slow axis in the direction is obtained. The long optical compensation film is taken up into a wound body. Further, the in-plane phase difference ^ of the 光学 舆 减 减 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学 光学10 parts by weight of a light-emitting agent of 90 parts by weight of a liquid crystal compound, 5 parts by weight of a photopolymerization start-up company, and methyl ethyl group (production of an optical compensation layer) The following chemical formula (1), the following chemical formula (2) The agent indicated (Irgacure 907: Cibafin I35902.doc • 36- 200935101 300 parts by weight of ketone was uniformly mixed to prepare a liquid crystal coating liquid. Secondly, the liquid crystal coating liquid was applied onto a long substrate (biaxially stretched PET film), heat-treated at 80 ° C for 3 minutes, and then irradiated with ultraviolet rays. The polymerization treatment is performed to form a cholesterol alignment solidified layer which becomes an optical compensation layer on the substrate. The thickness of the cholesterol alignment solidified layer is 3 μm, the phase difference Rth in the thickness direction is 120 nm, and the in-plane phase difference Re is substantially zero.化 (2) (Protective film) A protective film is used as a protective film using a long strip of triacetonitrile cellulose film (thickness 4 〇μηι, manufactured by K〇nica Minolta Co., Ltd., trade name: KC4UYW). The wound body is made ready for use. Further, the in-plane retardation Re of the protective film is 5 nm, and the phase difference in the thickness direction is Rtl 45 nm. (Preparation of an adhesive composition) Relative to the ethyl acetate-containing group Polyethylene glycol resin (average degree of polymerization: 1200, degree of recombination: 98. 5 mol%, acetylation degree: 5 mol%) 1 part by weight, at a temperature of 30 ° C Dissolving 5 parts by weight of hydroxymercapto melamine in pure water under conditions An aqueous solution having a solid concentration of 37% was obtained, and an aqueous solution of an alumina colloid (having an average particle diameter of 15 nm, a solid fraction of 10%, a positive charge) of 18 parts by weight was added to 100 parts by weight of the aqueous solution to prepare an adhesive composition. The viscosity of the adhesive composition was 9 6 mPa.s, and then the pH of the composition of 135902.doc -37-200935101 was 4 to 4.5. (Preparation of laminated optical film) The above adhesive composition was prepared after 3 G minutes. And the surface of the wound body is fed with the optical compensation film and the protective film, and the adhesive composition is applied to each of the single faces so as to have a thickness of up to 8 Å to form an adhesive layer. Thereafter, the optical compensation film on which the adhesive layer is formed is moved on one surface of the polarizing element that is fed from the wound body, and the protective film on which the interface layer is formed is moved on the other surface. The strips were wound by a roller machine for 6 minutes in a gas atmosphere of 55 C, and a long laminated body A was produced. Further, the slow axis and the absorption axis of the polarizing element are 45 in the clockwise direction. The optical compensation film is attached in the same manner. When the layered product A obtained above is sent out from the wound body, an isocyanate S-based adhesive (thickness: 2 μm) is used to form an optical compensation layer on the side of the optical compensation film of the laminated body. Cured layer. Thereafter, the substrate (biaxially stretched ruthenium film) was removed, and a long laminated optical film obtained by transferring a cholesterol alignment solid layer and a layer onto a laminate was produced. The thickness of the laminated optical film obtained in this manner was 115|[1111. [Embodiment 2] In addition to the use of the optical compensation 下述 described below, the absorption axis of the slow axis of the optical compensation film and the polarizing element was 165 in the clockwise direction. A laminated optical film was obtained in the same manner as in Example 以外 except that the optical compensation film was bonded. The thickness of the laminated optical iridium obtained as such is 115 μm. (Production of optical compensation film) For the norbornene-based resin (average molecular weight: 35, 〇〇〇, Tg: 14〇7), 35902, doc -38- 200935101, melt extrusion molding, which is obtained by this. The unstretched film (thickness: 6 〇μηι) was sandwiched in a tenter type stretcher and heated to ^❹^. While being transported in the longitudinal direction, the left and right stretcher speed ratio (speed difference) is adjusted to 1% by weight and extended in the transverse direction of the film, and also extended in the film transport direction to obtain a strip having a thickness of 35 μm. Optical compensation film (stretch film). A clockwise 165 in the longitudinal direction is obtained in the above manner. A long optical compensation film having a slow axis in the direction. The long optical compensation film is taken up to form a wound body. Furthermore, the in-plane retardation of the optical compensation film was 27 〇 nm and the Νζ coefficient was 1. [Example 3] A laminated optical film was prepared in the same manner as in Example 1 except that the aqueous alumina colloid solution was not added except for the preparation of the adhesive composition. The thickness of the laminated optical film thus obtained was 115 μm 〇 [Example 4] (Production of polarizing plate roll body) The above adhesive composition (see Example 丨) was prepared, and after 3 minutes, the one side was self-wound. The protective film (see Example 送) was sent, and the adhesive composition was applied to one side of the adhesive composition to a thickness of 80 nm after drying to form an adhesive layer. Thereafter, the protective film on which the adhesive layer was formed was moved on both surfaces of the polarizing element fed from the wound body, and bonded by a roll machine, and passed in a gas atmosphere of 55 ° C for 6 minutes. Rolling is performed to produce a long laminated film (so-called polarizing plate roll body). (Production of laminated optical film) Next, the polarizing plate roll body and the optical compensation 135902.doc • 39-200935101 (see Example 1) are fed from the wound body, and the acrylic adhesive (thickness is ^) 2 μηι) were bonded to each other to form a long laminated body b. Further, the slow axis of the optical compensation film and the absorption axis of the polarizing element are 45 in the clockwise direction. The optical compensation film is bonded to the film. While the laminated body obtained as described above is fed from the wound body, an isocyanate-based adhesive (thickness: 2 μm) is applied to the optical compensation film side of the laminated body, followed by the long-chain cholesteric alignment of the optical compensation layer. Cured layer. Thereafter, the substrate (biaxially stretched PET film) was removed to prepare a long laminated optical film in which the cholesterol alignment cured layer was transferred onto the layered body B. The thickness of the laminated optical film thus obtained was 115 μm. (Comparative Example 1) (Preparation of polarizing plate roll body) An adhesive composition was prepared in the same manner as in Example 以外 except that the oxidized gelling solution was not added. A polarizing plate roll was prepared in the same manner as in Example 4 except that the adhesive composition was used. ® (Production of Optical Compensation Film) A long strip of norbornene-based resin film (manufactured by Nippon Steel Co., Ltd., product SZeonor 'thickness 40 μηι, light transmittance coefficient 3.10x10-丨2m2/N) at 140 °C The soap shaft was extended to 1 to 52 times to prepare a long film. The film had a thickness of 35 μm, an in-plane retardation Re of 140 nm, and an Nz coefficient (Rth/Re) of 1.05. (Production of laminated optical film) A laminated sheet of a specific size is cut out from the obtained polarizing plate roll body and optical compensation film, respectively, and laminated by an acrylic adhesive (thickness 12 μηι), 135902.doc 40· 200935101 A laminate c is obtained. At this time, the slow axis of the optical compensation film and the absorption axis of the polarizing element are 45 in the counterclockwise direction. The way is to layer. Then, an isocyanate-based adhesive (having a thickness of 2 μm) was attached to the optical compensation film of the layered product C to form a long-length cholesterol alignment curing layer which serves as an optical compensation layer. Thereafter, the substrate (biaxially stretched PET film) is removed, and a layered body obtained by transferring the cholesterol alignment solidified layer onto the layered body c is obtained. • Cut the obtained laminate to a size of 1 mm x 100 mm to obtain a tantalum optical film. The thickness of the laminated film obtained in this way is 153 mm. V (Comparative Example 2) A laminated optical film was produced in the same manner as in the comparative example except that the following polarizing plate roll body was used. Further, the optical compensation film is laminated on the side of the polarizing plate roll body where the protective film is not provided. The thickness of the laminated optical film obtained in this manner was 15 3 μm (the production of the polarizing plate roll body). The above-mentioned adhesive composition was prepared (see Example 1), and after 3 minutes of Φ, the above-mentioned adhesive body was fed out from the wound body. The protective film (see Example 1) was coated with an adhesive composition on one side thereof so as to have a thickness of 80 nm after drying to form an adhesive layer. Thereafter, a protective film having an adhesive layer formed thereon was formed. Each of the polarizing elements sent from the winding body is moved on one surface, and the surface is attached by a roll machine, and is taken up in a gas atmosphere of 55 ° C for 6 minutes, thereby producing a polarizing plate roll body. The laminated optical films obtained in Examples 1 to 4 were subjected to the following evaluations. The evaluation results are summarized in Table 1. 1 · Peeling 135902.doc -41 · 200935101 The obtained laminated optical film was absorbed in the polarizing element. In the axial direction (longitudinal direction), it is 50 mm, and is cut in a size of 25 mm in the direction of the transmission axis orthogonal to the direction of the absorption axis to obtain a sample piece. The sample is: 60. Immersed for 5 hours. After immersion, Vernier card: Determine the peeling width from the end of the sample piece (the interface between the polarizing element and the adjacent film) 2. Appearance (with or without crack point defect) Cut 1000 mmxl〇〇〇mm from the laminated optical film obtained The sample piece of the size is placed under the fluorescent lamp, and the sample piece is superposed on another polarizing plate (manufactured by Nitto Denko Corporation, trade name: npf-SEG1224DU) J1 placed on the black light lamp. The absorption axis of the polarizing element of the sheet overlaps with the absorption axis of the other polarizing plates. In this state, the number of leaks (cracking defects) is counted. [Table 1] Peeling (mm) Cracking defect ( Example 1 0.5 0 Example 2 0.5 0 Example 3 0.5 24 Example 4 0.5 0 It can be seen from Table 1 that the occurrence of crack defects can be suppressed by laminating using an adhesive composition containing an alumina colloid. The laminated optical films obtained in Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated as follows. The evaluation results are summarized in Table 2. 1 · Peeling 135902.doc -42- 200935101 Cut out from the obtained laminated optical film 1000 mm x 1000 mm size Sample piece (Examples 1 to 3 only) The laminated optical film obtained in Comparative Examples 1 to 2 was directly used as a sample piece. The above sample piece was immersed in hot water at 60 ° C for 5 hours. The peeling width from the end side of the sample piece (the interface between the polarizing element and the adjacent film) was measured by a swimming k caliper. 2. Appearance (with or without foreign matter)

Ten pieces of a sample of 1 〇〇〇 nmxl 〇〇〇 mm were cut out from the obtained laminated optical film (Example 3). A laminated optical medium of 1 比较 comparative example was separately prepared for use as a sample piece. The obtained sample piece was visually observed under a fluorescent lamp, and the number of foreign matters mixed between the polarizing element or the polarizing plate and the adjacent film was confirmed. 3. Optical characteristics A sample piece having a size of 3 mm mm 45 was cut out from the obtained laminated optical film, and the monomer transmittance was measured using an integrating sphere type transmittance measuring machine (DOT-3C manufactured by Murakami Color Research Co., Ltd.). Polarization. The cut of the sample piece was 45 with the long side of the sample piece and the absorption axis of the polarized light (four). The way it is done. The volume transmittance was measured by providing a sample piece so that the protective film became the light source side of the measuring machine. Further, the degree of polarization is calculated based on the results obtained by measuring the parallel transmittance and the orthogonal transmittance. The parallel transmittance and the orthogonal transmittance are as follows: : Measure. Two sample pieces are prepared separately, and two sample pieces are placed with the protective films overlapping each other. Here, the absorption axis of the sample piece is set to be orthogonal to the absorption axis of the other sample I35902.doc -43·200935101. [Table 2] ------ Monomer transmittance (%) Polarization (%) Peeling (mm) Foreign matter (one piece / 1 piece) Example 1 Example 2 ------ 42.8 ~~~~ ~~~--- 100 0.5 0 42.8 100 0.5 0 Example 3 ------ 42.8 100 0.5 0 Comparative Example 1 43.8 99.9 0.5 3 Comparative Example 2 -—--- 43.5 99.9 3 3 _____ As can be seen from Table 2 It was confirmed that there were no foreign matters in Examples 1 to 3. On the other hand, it was confirmed that there was a foreign matter in Comparative Example 12. It can be seen that by transferring each layer, one

The layering on the surface can suppress the incorporation of foreign matter. Further, the laminated optical film obtained in the examples was excellent in both the monomer transmittance and the degree of polarization. Further, in Comparative Example 2 in which a polarizing element and an optical compensation film were laminated via an acrylic adhesive, the peeling was larger than in the other examples. The laminate was measured using the laminated optical film obtained in the following Reference Example 1 and Example 1, to measure the contrast. Further, the manufacturing method of the laminated optical plate and the method of carrying the contrast in the reference example are as follows. (Reference Example I), the following optical compensation 使用 was used, and the laminated optical film was obtained in the same manner as in the Example! The thickness of the laminated optical film thus obtained is 1 〇 3 μηι. (Production of optical compensation film) A line of maternity resin (average molecular weight: 35, qing, Tg: 14 〇. 〇 丁 熔融 melting (4) forming, the unstretched film obtained by this (thickness: 6 〇 I35902.doc - 44 - 200935101 μηι) in the tenter stretching machine 'and heated to 12〇t:. While conveying the film in the longitudinal direction, the speed ratio (speed difference) of the left and right tenter is adjusted to 5〇/. Extending in the transverse direction, and also extending in the direction in which the film is conveyed, a strip-shaped optical compensation film (stretching film) having a thickness of 35 μm is obtained. In the above manner, a clockwise direction 45 in the longitudinal direction is obtained. The direction has a slow axis. The strip-shaped optical compensation film is wound into the long optical compensation film to form a wound body. Further, the optical compensation film has an in-plane retardation of 14 〇 nm and a Νζ coefficient of 1.55. Production) The liquid crystal unit is removed from a liquid crystal display device (a handheld game machine manufactured by Sony Corporation) equipped with a VA (Vertical Align) mode liquid crystal cell. Secondly, an acrylic adhesive (thickness: 2 μm μm) is used. Obtained The laminated optical film obtained is attached to the visual side and the backlight side of the liquid crystal cell, respectively. In this case, the optical compensation layer (optical compensation film) is attached to the liquid crystal cell side, and is disposed in the liquid crystal cell. The absorption axes of the polarizing elements of the laminated optical films on both sides are laminated so as to be substantially orthogonal to each other. The liquid crystal panel is fabricated in such a manner that a backlight unit of the original liquid crystal display device is mounted on the obtained liquid crystal panel. In addition, the liquid crystal display device is formed, and the configuration of the liquid crystal panel obtained and the absorption axis of the polarizing element on the backlight side are used as the reference, and the absorption axis of the polarizing element on the visual side and the slow axis of the optical compensation film are used. The angle is shown in Table 3. 135902.doc -45- 200935101 [Table 3] Example 1 Reference Example 1 Protective film - Protective film - Polarizing element 90 Polarizing element 90 Optical compensation film (Re = 140 nm, Νζ = 1.05) 135 Optical compensation film (Re=140nm, Nz=1.55) 135 Optical compensation layer (Rth=120nm) - - - Liquid crystal cell (VA mode) Liquid crystal cell (VA mode) Optical compensation layer (Rth= 120 nm) - - Light Compensation film (Re=140 nm, Nz=1.05) 45 Optical compensation film (Re=140nm, Νζ=1·55) 45 Polarizing element 0 Polarizing element 0 Protective film - Protective film - (Measurement of contrast) Display of liquid crystal display device The white image and the black image were measured by the brand name "EZ Contrast 160D" manufactured by ELDIM Co., Ltd. The results of the liquid crystal panel of Example 1 are shown in Fig. 6, and the results of the liquid crystal panel of Reference Example 1 are shown in Figure 7. Further, the contrast ratio at a polar angle of 30° and an azimuth angle of 45° was as follows: Example 1 was 1 07, and Reference Example 1 was 65. From these results, it is understood that the contrast can be improved by providing the optical compensation layer. [Example 5] A laminated optical film was obtained in the same manner as in Example 1 except that the optical compensation film and the optical compensation layer described below were used. The thickness of the laminated optical film thus obtained was 115 μm. (Production of optical compensation film) 135902.doc -46- 200935101 For norbornene-based resin (average molecular weight: ... melt extrusion into %, &, , Tg. 140 C ) into μιη) In the film (thickness: 120 ^ stretching machine, the strip-shaped optical compensation film (stretching film) is controlled in such a manner that the twisting coefficient reaches the stretching temperature and the stretching ratio. 6 〇. - the thickness is 35 (four) obtained in the above manner in the length direction Time heart

= shape: compensation media. The strip-shaped optical compensation film is taken up, and the body is taken up. In addition, the in-plane retardation of the optical compensation film is 140 (production of an optical compensation layer), 9 parts by weight of the nematic liquid crystal compound represented by the above chemical formula (1), and the optically active agent represented by the above chemical formula (2). A liquid crystal coating liquid was prepared by mixing 5 parts by weight of a photopolymerization initiator dWei 907: manufactured by Ciba Specialty Chemicals Co., Ltd. and 300 parts by weight of methyl ethyl ketone to uniformity. Next, the liquid crystal coating liquid was applied onto a long strip substrate (biaxially stretched PET film), heat-treated at 8 ° C for 3 minutes, and then irradiated with ultraviolet rays for polymerization treatment to form an optical compensation layer on the substrate. The cholesterol is aligned to the solidified layer. The thickness of the cholesteric alignment-hardened layer was 1 μm, and the phase difference Rth in the thickness direction was 40 nm, and the in-plane phase difference Re was substantially zero. (Reference Example 2) A laminated optical film of Reference Example 2 was obtained in the same manner as in Comparative Example 1, except that the optical compensation layer of Example 5 and the polarizing plate roll of Example 4 and the optical compensation film described below were used. That is, each of the cut layers (films) was attached to obtain a laminated optical film. The thickness of the laminated optical film obtained in this way is 135902.doc -47 - 200935101 1 5 5 μπι ° (production of optical compensation film). The norbornene-based resin film (manufactured by JSR, trade name: Αη〇η, thickness 120 μπι The melt-extrusion molding was carried out to control the elongation temperature, the stretching ratio, the speed ratio, and the like in such a manner that the wNz coefficient was 16 Å, and a long optical compensation film having a refractive index distribution of nx > ny > nz and having a thickness of 35 μm was obtained. Further, the in-plane retardation Re of the optical compensation film was 140 nm. (Measurement of optical axis shift) From the laminated optical film of Example 5, a sample piece of 5 pieces of m〇〇x m x mm 1 mm was cut out. 50 sheets of the laminated optical film of Reference Example 2 were produced and used as a sample piece. The product name "K〇BRA·wpR" manufactured by the prince measuring machine was used to measure the angle of the optical axis of the sample piece, and the optical axis shift was calculated. Table 4 shows the average values of the optical axis shifts of the laminated optical films of Example 5 and Reference Example 2 and the standard deviation of 50 sample pieces. Example 5 (n=5〇) Reference Example 2 (n=50) Average value of optical axis shift (.) 0.1 *----- 0.1 Standard deviation 0.110 0.160 As can be seen from Table 4, by using continuous scroll type (R〇ii_t〇_R〇n) to produce a laminated optical film, which suppresses unevenness in optical axis shift. Using the laminated optical film obtained in the above Example 5 and Reference Example 2, 50 liquid crystal panels were produced, and the average value of the monomer transmittance and the value obtained by the unit (the orthogonal transmittance of the unit) was measured. The standard deviation I. Further, the liquid 135902.doc -48-200935101 crystal display device is manufactured in the same manner as the reference example 1 except that the laminated optical film is used as follows: For the liquid crystal panel of the embodiment 5, the same film reel is used. The obtained laminated optical film was cut out to a specific size, and the polarizing plate roll body, the optical compensation film, and the optical compensation layer were cut out to a specific size for the liquid crystal panel of Reference Example 2, and the laminated optical film was laminated on the obtained one. The method of measuring the monomer transmittance and the orthogonal transmittance is the same as described above. The configuration of the obtained liquid crystal panel and the absorption axis of the polarizing element on the visual side when the absorption axis of the polarizing element on the backlight side is used as a reference The axial angle of the slow axis of the optical compensation film is shown in Table 5. [Table 5] Example 5 Reference Example 2 Protective film protective film - Polarizing element 90 Polarizing element 90 - - Protective film - Optical compensation Film (Re=140nm, Nz=1.60) 135 Optical compensation film (Re=140nm, Nz=1.60) 135 Optical compensation layer (Rth=40 nm) - Optical compensation layer (Rth=40nm) Liquid crystal cell (VA mode) Liquid crystal cell (VA mode) Optical compensation layer (Rth = 40 nm) - Optical compensation layer (Rth = 40 nm) - Optical compensation film (Re = 140 nm, Nz = 1.60) 45 Optical compensation film (Re = 140 nm, Nz = 1.60) 45 - - Protective film polarizing element 0 Polarizing element 0 Protective film - Protective film - The average value and standard deviation of the monomer transmittance and the orthogonal transmittance of the liquid crystal display devices of Example 5 and Reference Example 2 are shown in Table 6. 135902 .doc -49- 200935101 [Table 6] Monomer transmittance ~ Example 5 (η = 50) Reference Example 2 (η = 50) 43.6 43.6 Average orthogonal transmittance (%) 0.0186 0, 0250 Standard deviation 0.002 0.002 . As can be seen from Table 6, it is produced by a continuous roll type (Roll-to-Ron) and a laminated optical film obtained by the same film roll is used, whereby the average orthogonal transmittance is low and the light leakage is small. It can be seen that the optical axis shift of the laminated optical yoke disposed on the $ side of the liquid crystal cell can be suppressed. Further, as shown in Reference Example 2, the layers are cut out and respectively When bonding, it is necessary to provide a protective film between the polarizing element and the optical compensation film, so that there is an abnormality due to scattering or refractive index. Furthermore, an attempt is made to protect the polarizing element from the optical compensation film. The enamel film was formed by cutting out the layers, but the polarizing plate was warped and could not be bonded. [Example 6] φ A laminated optical film was obtained in the same manner as in Example 5 except that the optical compensation film described below was used. The thickness of the laminated optical film thus obtained was 11 5 μη. • (Production of optical compensation film) • Melt extrusion molding of norbornene-based resin (average molecular weight: 35,0〇〇, Tg: l4〇<t), and the resulting unstretched 骐 (thickness) :14〇μιη) is sandwiched in a tenter type stretching machine, and the elongation temperature, the stretching ratio, the speed ratio, etc. are controlled in such a manner that the coefficient is 〇·9〇, and a strip-shaped optical compensation film having a thickness of 35 μm is obtained ( Stretch film). 135902.doc -50· 200935101 A long optical compensation film in the longitudinal direction of the clockwise 4 is obtained in the above manner. The winding of the long Q has a slow ^ Μ, and the strip is first learned to compensate the film to form a wound body. Furthermore, the optical compensation armored nm. The in-plane phase difference Re of the film is 14〇

[Example 7J: Formula: Other than the second compensation film] The same formula as in Example 5 was used. The thickness of the laminate (4) obtained as in (4) is (the production of optical compensation film). For the norbornene-based resin (average molecular weight ~, υυυ, 丁g: 14 〇. Wide, cold line = melt extrusion molding, which will be obtained by this Unstretched film (thickness: 140 _ sandwiched in (four) type μ❹, with _ number of materials κ extension temperature, extension ratio, fast yield ratio stupid, product from 10,000 control η fan ratio, etc. to obtain a thickness of 35 μιη strip Optical compensation film (stretched film). Obtained in the above-mentioned manner in the length direction. The back is a clockwise 45. The direction is slow.

Long strip optical compensation film for the shaft. Roll up the other U into the #栌^ food strip optical compensation film, and make nm into a wound body. Further, the in-plane phase "Ο n rv» λ of the optical compensation film [Example 8] A laminated optical film was obtained in the same manner as in the Example except that the optical compensation film described below was used. The thickness of the laminated optical film thus obtained is 11 5 μπι 〇 (production of optical compensation film) 35'00G 'Tg : i4 〇 ° C ) Into norbornene resin (average molecular weight 135902.doc 51 200935101 line melt extrusion Forming the unstretched film obtained by this (thickness: (10) (four) is sandwiched in a tenter type stretching machine, and the elongation temperature, the stretching ratio #, the speed ratio, etc. are controlled in such a manner that the Nz coefficient reaches 丨.4G, and the thickness is obtained. a strip-shaped optical compensation film (stretching film) of 35 Å. A clockwise 45 in the longitudinal direction is obtained in the above manner, and a long optical compensation film having a slow axis in the direction is taken up. The long optical compensation film is taken up, Further, a wound body was produced. Further, the in-plane retardation of the optical compensation film was 14 〇 nm ° [Example 9] A laminated optical was obtained in the same manner as in Example 5 except that the following optical compensation film was used. The thickness of the laminated optical film obtained in this way is 11 5 μm. (Production of optical compensation film) The norbornene-based resin (average molecular weight: 35, 〇〇〇, butyl light:) is melt-extruded into %, Will not get it The stretch film (thickness: (10) φ μ〇1) is clamped in a tenter type stretching machine, and the elongation temperature, the stretching ratio, the speed ratio, etc. are controlled in such a manner that the ^^2 coefficient reaches 1.50, and a strip having a thickness of h^ is obtained. Optical compensation film (stretching film). A clockwise 45 in the longitudinal direction is obtained in the above manner. A long strip-shaped optical compensation film having a slow axis in the direction. The long optical compensation film is wound up to be wound. Further, the in-plane phase difference of the optical compensation film is just nm 〇 [Example 10] In the same manner as in Example 5 except that the optical compensation film described below is used, 135902.doc • 52-200935101 is obtained. Laminated optical film. The thickness of the laminated optical film thus obtained is 11 5 μηι. (Production of optical compensation film) The norborne resin (average molecular weight: 35, _, Tg: 14 (rc) is melted and extruded Forming, the unstretched film obtained by this (thickness: i4〇_ clipped to the tenter type stretching machine t, controlling the ❹ 2 stretching temperature, the stretching ratio, the speed ratio, etc. by the Nz coefficient to reach the age of ,, and obtaining the thickness (4) Long strip optical compensation 臈 (extend 臈) In the above manner, the lengthwise direction (10) is obtained in the longitudinal direction. The strip has a slow strip-shaped optical compensation film. The strip-shaped optical compensation film is taken up to form a wound body. Further, the optical compensation film is used. In-plane phase 14 〇 nm ° [Example 11] In addition to the use of the following optical compensation film, κ (...) (formation of optical compensation film) / for norbornene-based resin (average molecular weight: 35, _, Tg 饤 melting Extrusion forming, the unextended C) obtained by this is sandwiched in the tenter type stretching machine, and the coefficient is α, the extension temperature, the stretching ratio, the speed ratio, etc., and the thickness is obtained. 35 strip-shaped optical compensation film (stretch film). - Horse 35 μηΐ2 Obtain the long optical compensation 顺 of the clockwise sleeve in the longitudinal direction in the above manner.棬 The strip-shaped optical compensation film is taken up slowly, and IJ5902.doc -53- 200935101 is made into a wound body. Further, the retardation Re of the optical compensation film was 140 nm. [Example 12] A laminated optical film was obtained in the same manner as in Example 5 except that the optical compensation film described below was used. The thickness of the laminated optical film obtained in this way is 11 5 μπι. (Production of optical compensation film) The norbornene thin resin (average molecular weight: 35'_, Tg: 14 〇. 〇 is melt-extruded), and the unstretched film (thickness: just μηι) obtained thereby is sandwiched In the tenter type stretching machine, a long strip-shaped optical compensation film (stretching film) having a thickness of 35 (four) is obtained by controlling the H degree of latitude, the stretching ratio, the speed ratio, etc. by means of a system. In the above manner, a clockwise 45 in the longitudinal direction is obtained. The strip-shaped optical compensation film having a slow axis in the direction is taken up. The strip-shaped optical compensation 臈': and '9 into a wound body. Again' the optical compensation The in-plane retardation of the film was 140 nm [Example 13] A laminated optical film was obtained in the same manner as in Example 5 except that the optical compensation film described below was used. The thickness of the laminated optical medium thus obtained was 11 5 Ηηι. X, (Production of optical compensation film) - For the norbornene lanthanide resin (average molecular weight: 35, _, Tg: 14 〇. 炼 smelting extrusion * forming, the unstretched film obtained by this (thickness) :(10) (4) clamped in the tenter type extension machine, with (4) number up to 0 The mode control delay 135902.doc -54- 200935101, the thickness of the stretch, the magnification ratio, and the like, and obtain a thick strip optical compensation film (the extension 臈 is 5 μϊη long. The above method is obtained in the longitudinal direction of the clockwise 45. Direction The upper side is slowly made into a shaking seam (4), and the long optical compensation film is taken up, and -nme is compensated for the in-plane phase difference of 14〇 (refer to Example 3) except that the following optical compensation film is used. The laminated optical film was obtained in the same manner as in Example 5. The thickness of the laminated optical iridium obtained in this manner was 11] μηι 〇 (manufactured by optical compensation film). The norborne resin (average molecular weight: 35, _, Tg: 14th generation) melt-extrusion molding, the unstretched film obtained by this (thickness: 14〇μπ〇 in the tenter type stretching machine, controlling the extension in the form of _ number The temperature, the stretching ratio, the speed ratio, etc. are obtained, and the thickness is Μ(4). The strip-shaped optical compensation film (stretching film) is obtained in the above-mentioned manner in the clockwise direction in the longitudinal direction. The long strip optical in the direction and the slow axis Compensation film. The optical compensation film is formed into a wound body. Further, the in-plane retardation Re of the optical compensation film and the collar member is 140 ' nm ° (Reference Example 4), except that the optical compensation film described below is used. A laminated optical film was obtained in the same manner as in Example 5. The thickness of the laminated optical film thus obtained was 1 】5 μηι. 135902.doc -55- 200935101 (Production of optical compensation film) Pair of norbornene-based resin (average Molecular weight: 35, 〇〇〇, melt extrusion molding, which will result in ' ' Tg: 140 ° c) into μηι) sandwiched in a tenter stretcher, reaching the thickness in (4): "Ο Extension temperature , stretching ratio, speed ratio, etc., and obtaining a thick sound=type control strip-shaped optical compensation film (stretching film). a is 35 μιη long

The (four) needle 45 in the longitudinal direction is obtained in the above manner. Long strip-shaped optical compensation film in the direction of the car. The long optical compensation film is taken up to form a wound body. Further, the in-plane retardation Re of the optical compensation film was 140, and the contrast was measured by using the laminated optical medium obtained by the above-described Examples 5 and 8 to 13 to produce a liquid crystal display device. The liquid crystal display device was manufactured by the same method as in the above-described Example 5. The method of measuring the contrast is also the same as described above. The results of the liquid crystal display devices of Examples 5 and 8 to 13 are shown in Fig. 8. From these results, it is understood that the contrast can be further improved by providing an optical compensation layer having a specific range of Nz coefficients. [Industrial Applicability] The laminated optical film of the present invention can be suitably applied to various image display devices' and can be preferably applied to liquid crystal display devices. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a laminated optical film according to a preferred embodiment of the present invention. Fig. 2 is a perspective view showing the 135902.doc - 56 - 200935101 of the optical axes constituting the layers of the laminated optical film shown in Fig. 1. Fig. 3 is a schematic plan view showing an example of oblique extension. A schematic view showing a step of an example of a method for producing a laminated optical film of the present invention. A schematic view showing two steps in an example of a method for producing a laminated optical film of the present invention. Fig. 5 (4) is an explanatory view showing a step of bonding a protective layer of a ruthenium, a polarizing element, and a photo-compensation film to a stomach by coating an optical compensation layer on a substrate. Fig. 5(b) is a schematic view showing the step (4) of peeling off the substrate from the laminated body obtained from Fig. 5(a). The graph of the contrast of the viewing angle dependence of the contrast of the liquid crystal panel of the laminated optical film of the embodiment of the present invention is used. Fig. 7 is a contrast contour map showing the viewing angle dependence of the contrast of the liquid crystal panel of the laminated optical film of Reference Example 1. Fig. 8 is a contrast contour map showing the viewing angle dependence of the contrast of the liquid crystal display devices of Examples 5 and 8 to the laminated optical film of the present invention. [Description of main component symbols] 10 laminated optical film 11 polarizing element 12 optical compensation film 13 optical compensation layer 14 adhesive layer 15 protective film 135902.doc •57·

Claims (1)

200935101 X. Patent application scope: 】. A laminated optical film, which is long strip-shaped, and has a long strip-shaped polarizing element with an absorption axis in the longitudinal direction and an index ellipsoid An optical compensation layer having a relationship of nx> nyhZ, an optical compensation layer having a relationship of nx=ny> nz, and an optical compensation film: an angle formed by a slow axis and an absorption axis of the polarizing element For 5 to 85. . 2. The laminated optical film of the requester, wherein the above-mentioned compensation film has a coefficient of 0.9 to 2.0. 3. The laminated optical medium of claim (4) which is obtained by obliquely extending the optical compensation film described above. 4. The laminated optical film of claim _ wherein said optical compensation layer is a cholesteric alignment cured layer. 5. The laminated optical film of claim 3, wherein the optical compensation layer is a cholesterol solidified layer. 6. The laminated optical film according to claim 1 or 2, wherein an adhesive layer is provided between the polarized light and the optical compensation film, and the adhesive layer is composed of a polyvinyl alcohol resin and a crosslinking agent. The adhesive composition of the metal compound colloid having an average particle diameter of 1 to 100 nm. The laminated optical film according to claim 3, wherein an adhesive layer is provided between the polarizing element and the optical compensation film, The subsequent layer is formed of an adhesive composition containing a polyvinyl alcohol-based resin, a crosslinking agent, and a metal compound colloid having an average particle diameter of 135,902.doc 200935101 of 1 to 100 nm. 8. The laminated optical film according to claim 4, wherein an adhesive layer is provided between the polarizing element and the optical compensation film, wherein the adhesive layer comprises a polyvinyl alcohol resin, a crosslinking agent, and an average particle diameter of An adhesive composition of a metal compound colloid of 1 to 100 nm is formed. 9. The laminated optical film according to claim 5, wherein an adhesive layer is provided between the polarizing element and the optical compensation enthalpy, and the adhesive layer is composed of a (tetra)ethylene-based resin, a crosslinking agent, and an average particle. An adhesive composition of a metal compound colloid having a diameter of WOO nm is formed. 10. The laminated optical film of claim 2 or 2 is formed into a roll shape. Φ 11. The laminated optical film of claim 3, which is formed into a roll shape. 12. The laminated optical film of claim 4, which is formed into a roll shape. 13. The laminated optical film of claim 5, which is formed into a roll shape. .14. The laminated optical film of claim 6, which is formed into a roll shape. 15. The laminated optical film of claim 7, which is formed into a roll shape. 16. The laminated optical film of claim 8 which is formed into a roll shape. 17. The laminated optical 臈 of claim 9 is formed into a roll shape. 18. A method for producing a laminated optical film, comprising: a long optically-compensable amine having a relationship of 折射率-135902.doc 200935101 in a longitudinal direction of a refractive index ellipsoid, and being elongated and longitudinally oriented a polarizing element having an absorption axis, wherein the surface is polarized in a longitudinal direction of the optical compensation film and in a longitudinal direction of the polarizing element, and is polarized on one side of the optical compensation film via the sword composition a step of forming a laminate; and a step of forming an optical compensation layer having a relationship of nx=ny> nz on the side of the optical compensation film side of the optical compensation film; 19. _ 20. and the laminate The optical film is produced by the angle between the slow axis of the optical compensation film and the absorption axis of the polarizing element. Carry out the layering. A method for manufacturing a laminated optical yoke, comprising: optical compensation of a unilateral laminated refractive index ellipsoid having a relationship of nx=ny> nz in a long optical compensation film having a relationship of an index ellipsoid having nx> ny g a step of forming a layered body; and transporting the laminated body and the polarizing element having an absorption axis in the longitudinal direction in the longitudinal direction, and the length direction of the optical compensation film and the length of the polarizing element a step of laminating the polarizing element on the side of the optical compensation film of the laminated body via the adhesive composition in a uniform direction; and the method of manufacturing the laminated optical film is the slow axis of the optical compensation film and the absorption axis of the polarizing element The angle formed becomes 5 to 85. The way to carry out the layering. The method for producing a laminated optical film according to claim 18 or 19, further comprising the steps of: laminating or punching the laminated body after laminating the polarizing element, the optical compensation film, and the optical compensation layer 135902.doc 200935101; . The method of producing a laminated optical film according to claim 18 or 19, wherein the adhesive composition comprises a polyethylene glycol-based resin, a crosslinking agent, and a metal compound colloid having an average particle diameter of from 1 to 100 nm. 22. The method of producing a laminated optical film according to claim 2, wherein the adhesive composition comprises a polyvinyl alcohol-based resin, a crosslinking agent, and a metal compound colloid having an average particle diameter of 1 to 100 nm. 23. A laminated optical film produced by the method of manufacturing according to any one of claims 18 to 22. 24. A liquid crystal display device, which will be as claimed in paragraphs 9. The laminated optical film of any one of the liquid crystal display devices disposed on both sides of the liquid crystal cell, and the laminated optical film is obtained by the same film roll ❹ 135902.doc