TW201219846A - Light-diffusing polarization plate and liquid-crystal display device - Google Patents

Abstract

Disclosed is a new light-diffusing polarization plate that diffuses light sufficiently and also provides other good optical functionality. Also disclosed is a liquid-crystal display device (400) using said light-diffusing polarization plate. The light-diffusing polarization plate (100) is provided with: a polarizing film (101); a light-diffusing film (102) laminated onto the polarizing film (101); and a surface-treated film (103) laminated onto the light-diffusing film (102). The light-diffusing film (102) has a light-diffusing layer (106) that contains: a light-transmitting resin (106a); and between 20 and 100 weight parts of light-transmitting microparticles (106b), dispersed in the light-transmitting resin (106a), per 100 weight parts of the light-transmitting resin (106a). The surface-treated film (103) is formed from a transparent resin film (107), one surface of which is optically treated. The light-diffusion layer (106) and the surface-treated film (103) are bonded to each other by an adhesive or pressure-sensitive adhesive layer (104).

Description

201219846 VI. [Technical Field] The present invention relates to a light diffusing polarizing plate and a liquid crystal display device using the same. [Prior Art] In recent years, the use of liquid crystal display devices for mobile phones, personal computer monitors, televisions, and liquid crystal projectors is rapidly expanding. In general, a liquid crystal display device includes a backlight unit and a liquid crystal panel, and the liquid crystal panel includes a liquid crystal cell, a back side polarizing plate disposed on a backlight side of the liquid crystal cell, and a front side polarizing plate disposed on a visual side of the liquid crystal cell. In the liquid crystal display device, when the display of the pupil surface is observed from the oblique direction, it is pointed out that it is impossible to obtain a high contrast ratio, and the gray scale inversion phenomenon of the image is reversed, and the display property cannot be obtained. The problem is that the angle of view is narrow. As a method for solving the problem of the viewing angle characteristic, a technique of imparting a light diffusing function to the front side polarizing plate has been known. For example, Japanese Patent Laid-Open Publication No. 2009-301014 (Patent Document 1) discloses a polarizing plate having a relatively high light diffusibility on the front side (visual side) of the liquid crystal cell (referred to as "the first in Patent Document 1". 2 light diffusion layer"). The second light-diffusing layer includes, for example, a polarizing plate and a resin layer (light-diffusing layer) provided with a relatively large filler (light diffusing agent) and provided with a light diffusing function on the front side of the polarizing plate. [Problems to be Solved by the Invention] On the other hand, for the purpose of further improving the visibility of the liquid crystal display device, The outermost surface of the front side of the liquid crystal display f, that is, the outermost surface of the front side polarizing plate is subjected to an anti-glare treatment for preventing or reducing external light from being incident on the display surface or to prevent or reduce external light incident on the display surface. The anti-reflection of the reflection is treated by optical processing such as S. To make! Optical processing such as hai is sufficient to express a specific function and it is necessary to precisely control the shape of the surface on which the optical treatment is performed. However, the light diffusion layer of the filler having a relatively large content in the light diffusion layer of the front side polarizing plate described in the above-mentioned Patent Document 1 may not be able to sufficiently control the surface shape thereof. In this case, it may be difficult to directly The surface of the light-diffusing layer is subjected to the above-described optical treatment, or a specific function such as an anti-glare function or an anti-reflection function cannot be satisfactorily exhibited even if optical processing can be directly performed by itself. Accordingly, an object of the present invention is to provide a novel light diffusing polarizing plate and a liquid crystal display device using the polarizing plate, which has a light diffusing plate having sufficient light diffusibility, and further satisfactorily exhibits other Optical function. Means for Solving the Problems The present invention provides a light diffusing polarizing plate comprising: a polarizing film; a light diffusing film # laminated on the polarizing film; and a surface treating film laminated on the light diffusing film; a light diffusing film a light-diffusing layer comprising light-transmissive saplings and light-transmissive fine particles dispersed in the 156990.doc 201219846 optical resin and relative to the light-transmitting resin i 〇〇 parts by weight and 2 parts by weight or more and 100 parts by weight or less, the surface treatment film is formed of a transparent resin film which is optically treated on one surface, and the light diffusion layer and the surface treatment film are passed through an adhesive layer or an adhesive layer And fit each other. In the light diffusing polarizing plate of the present invention, it is preferred that the surface treatment film has a surface that is not subjected to optical treatment, and that the surface of the light diffusion layer and the surface treatment film that is not subjected to optical treatment is attached to each other via an adhesive layer or an adhesive layer. The light diffusion layer is bonded to the surface treatment film. The optical treatment can be, for example, an anti-glare treatment or an anti-reflection treatment. Preferably, the light diffusion film comprises a transparent substrate film and the light diffusion layer laminated on the transparent substrate film. The light-diffusing layer of the light-diffusing film can be formed by coating a resin liquid in which light-transmitting fine particles are dispersed on a transparent substrate film. Further, the light diffusion layer may be formed by applying a resin liquid in which the light-transmitting fine particles are dispersed to the transparent base film, and transferring the mirror surface or the uneven surface of the mold on the surface of the layer formed of the resin liquid. . Further, the present invention provides a liquid crystal display device comprising, in order, a backlight device light expansion mechanism, a backlight side polarizing plate, a liquid crystal cell, and the above-described light-expanding polarizing plate. In the liquid crystal display device of the present invention, the light diffusing polarizing plate is disposed such that the polarizing film is closer to the liquid crystal cell than the surface treating film. In the liquid crystal display device of the present invention, it is preferable that the light emitted from the light diffusing means is inclined by 7 Å from the direction perpendicular to the light incident surface of the liquid crystal cell. The direction of 92 degrees with respect to the brightness in the vertical direction is the following light distribution characteristic and includes non-parallel light. The light diffusing mechanism can be 'from the backlight side: from the side of the light diffusing plate and the light I56990.doc 201219846 deflector plate as a liquid crystal cell can use TN (Twisted Nematic) type liquid crystal cell, IPS (in_piane Switching , transverse electric field switching) liquid crystal cell or VA (Vertical Alignment) type liquid crystal cell. Advantageous Effects of Invention According to the present invention, it is possible to provide a light diffusing polarizing plate which has sufficient light diffusibility and which exhibits other optical functions well. [Embodiment] <Light diffusing polarizing plate> Fig. 1 and Fig. 2 are schematic cross-sectional views showing preferred examples of the light diffusing polarizing plate of the present invention. The light diffusing polarizing plate 100 and 200 shown in FIG. 2 and the light diffusing polarizing plate 100 and 200 include a polarizing film 101, a light diffusing film 1〇2 laminated on the polarizing film 101, and a surface treating film 103. Laminated on the light diffusion film 1〇2; the light diffusion film 102 has a light diffusion layer 1〇6, and the surface treatment film 1〇3 is optically treated (specifically, the surface treatment layer 1〇8 is applied) The transparent resin film 107 is formed, and the light diffusion layer 106 and the surface treatment film 103 of the light diffusion film 1〇2 are bonded to each other via the adhesive layer or the adhesive layer 1〇4. In the light diffusing polarizing plates 丨0〇, 2〇〇 shown in FIG. 1 and FIG. 2, the light diffusing film 102 includes a transparent base film 1 〇 5 and light laminated on the transparent base film 1 〇 5 . In the diffusion layer 106, the light diffusion layer 1〇6 includes a resin layer in which the light-transmitting fine particles 106b are dispersed in the light-transmitting resin i〇6a. The light-diffusing film 1 〇2 is laminated on the transparent substrate film 105 side so as to face the polarizing film 1〇1, that is, the transparent substrate film 105 is closer to the polarizing film i〇i than the light-diffusing layer 106. On the film 101. The light diffusing film 102 of the present invention may have a flat surface as shown in FIG. 1 . The surface of the diffusion layer 106 may include a flat surface, or the surface of the light diffusion layer 106 may include a bump as shown in FIG. 2 . surface. The surface treatment film 103 comprises a transparent resin film 1〇7 and a surface treatment layer 108 laminated on one surface of the transparent resin film 1〇7. The surface treatment film 1〇3 is on the opposite side of the surface of the transparent resin film 107 from the surface treatment layer 1〇8 (the surface on which the surface of the surface treatment film 103 is not subjected to optical treatment), via the adhesive layer or the adhesive layer 104. The light diffusion layer 1〇6 is bonded to the light diffusion film 1〇2. Further, the 'protective film 119 is used to protect the film on the other surface of the polarizing film 1 〇 1 'but it is not essential and may be omitted. Further, an optical compensation film such as a retardation film (phase difference plate) may be bonded to the protective film 1 〇9. According to the light diffusing polarizing plate 丨〇〇, 200' of the present invention having the above configuration, the light diffusion layer 1 〇 6 of the light diffusion film 1 〇 2 and the surface treatment layer 1 〇 8 are laminated on the transparent resin film 107. The formed surface treatment film ι 3 is bonded via the adhesive layer or the adhesive layer 104, so that the control precision of the surface shape of the light diffusion layer 1 〇6 can be completely and completely excluded from the light diffusion layer 106. The surface shape of the diffusion layer 106 affects the structure and shape of the surface treatment layer log. The surface treatment film 103 having a desired optical function in one area layer. Therefore, the light diffusing polarizing plates 100, 2 of the present invention exhibit a good light diffusing function and a specific optical function realized by the surface treating layer 108. Hereinafter, the light diffusing polarizing plate of the present invention will be described in detail. (Polarizing film) The polarizing film 101 may, for example, be a polyvinyl alcohol-based resin, a polyvinyl acetate resin, or an ethylene/vinyl acetate (EVA (Electrically 156990.doc 201219846).

Tilted Vertical Alignment)) A film of a resin, a polyamide resin, a polyester resin, or the like, which has a dichroic dye or an anthracene, and has a disaccharide dehydration product containing an aligned polyvinyl alcohol ( A molecularly aligned polyvinyl alcohol film of a poly(ethylene glycol)/polyethyleneethylene copolymer of a molecular chain of poly(ethylene). In particular, a dichroic dye or iodine is preferably used as a polarizing film in a uniaxially stretched polyvinyl alcohol resin film. The thickness of the polarizing film 10 1 is not particularly limited, but is preferably 1 〇〇 or less, more preferably 10 to 50 μmη, and more preferably 25 〜 from the viewpoint of thinning of the light-diffusing I1-based polarizing plate. 35 μηι. (Light-diffusing film) The light-diffusion film 102 used in the present invention preferably includes a transparent base film 105 and a light-diffusing layer ' laminated on the transparent base film 1〇5' as shown in FIGS. 1 and 2 The diffusion layer 1〇6 includes a resin layer formed of the light-transmitting resin 1〇6a and the light-transmitting fine particles (light diffusing agent) 1〇61) dispersed in the light-transmitting resin 106a. The transparent base film 105 is not particularly limited as long as it is optically transparent, and for example, a glass or a plastic film can be used. The plastic film preferably has a moderate transparency and mechanical strength, and specifically, a cellulose acetate resin such as TAC (Triacetyl cellulose 'triacetate cellulose), a propylene resin, a polycarbonate resin, and a poly Polystyrene resin such as ethylene terephthalate. The thickness of the transparent substrate film 1〇5 is, for example, 1 〇 to 5 〇〇 pm, and the weight of the car is 20 to 300 μη. The light-diffusing layer 106 is a layer of the light-transmitting resin i〇6a as a base material, and the light-transmitting fine particles i〇6b are dispersed in the light-transmitting resin 106a. The light-transmissive 156990.doc 201219846 resin 106a is not particularly limited as long as it has light transmittance, and for example, curing of an ionizing radiation curable resin such as an ultraviolet curable resin or an electron beam curable resin or a thermosetting resin can be used. A cured product of a thermoplastic resin, a cured metal alkoxide, or the like. Among them, ionizing radiation curable resins are preferred in terms of higher hardness and scratch resistance. In the case of using an ionizing radiation-curable resin, a thermosetting resin or a metal alkoxide, the resin is cured by irradiation or heating of ionizing radiation to form a light-transmitting resin 100a. Examples of the ionizing radiation-curable resin include: an acrylic acid such as a polyacrylic acid or a methacrylate; and a hydroxyl group such as a diisocyanate, a polyhydric alcohol, and an acrylic acid or methacrylic acid. A polyfunctional amide phthalic acid ester or the like synthesized by an ester or the like. Further, in addition to these, it is also possible to use an acrylic resin, a polyester resin, an epoxy resin, an alkyd resin, a acetal resin, a polybutadiene resin, a polythiol polyene having an acrylic resin. Resin, etc. Examples of the thermosetting resin include a phenol resin, a urea melamine resin, an epoxy resin, an unsaturated polyester resin, and an anthracene resin, in addition to the thermosetting amine ester resin prepared from the acrylic polyol and the isocyanate prepolymer. . Examples of the thermoplastic resin include cellulose derivatives such as cellulose acetate, nitrocellulose, acetyl butyl cellulose, ethyl cellulose, and decyl cellulose, vinyl acetate and copolymers thereof, and vinyl chloride and the like. Vinyl resins such as copolymers, vinylene and copolymers thereof; acetal resins such as polyethylene and polyethylene, and propylene resins such as propylene resin and copolymer, methacryl resin and copolymers thereof Polystyrene resin; polyamine resin; polyacetal resin; and polycarbonate resin. 156990.doc 201219846 As the metal alkoxide, a cerium oxide-based substrate or the like having a decane oxide-based material as a raw material can be used. Specifically, it is tetramethoxy decane, tetraethoxy decane or the like, and an inorganic or organic inorganic composite matrix (translucent resin) can be formed by hydrolysis or dehydration condensation. Further, as the light-transmitting fine particles 106b, a light diffusing agent formed of organic fine particles or inorganic fine particles having light transmissivity can be used. For example, organic fine particles formed of an acrylic resin, a melamine resin, polyethylene, polystyrene, an organic fluorenone resin, an acrylic-styrene copolymer, or the like, or calcium carbonate, cerium oxide, aluminum oxide, or carbonic acid may be mentioned. Inorganic fine particles formed by ruthenium, barium sulfate, oxidized chin, glass, and the like. Further, an inner hollow sphere or a hollow glass bead of an organic polymer may also be used. The light-transmitting fine particles may be composed of one type of fine particles or may contain two or more kinds of fine particles. The shape of the light-transmitting fine particles 106b may be any shape such as a spherical shape, a flat shape, a plate shape, a needle shape, or an irregular shape, but is preferably spherical or substantially spherical. The weight average particle diameter of the light-transmitting fine particles 16b is preferably 〇 5 to 15 μηη, more preferably 3 to 8 μηη. When the weight average particle diameter of the light-transmitting fine particles 1〇6b is less than 〇·5 μηι, the light diffusibility of the light-diffusing film 1〇2 is insufficient, and as a result, the light diffusing and diverging polarization is applied to the liquid crystal display. When the board is 1 〇〇 or 2 ,, there is a case where a sufficient wide viewing angle performance cannot be obtained. Further, when the weight average particle diameter exceeds 15 μη, the light diffusion film 1〇2 may not have sufficient light diffusibility. Further, the ratio of the standard deviation of the particle diameter of the light-transmitting fine particles b6b to the weight average particle diameter (standard deviation/weight average particle diameter) is preferably 〇·5 or less, more preferably 〇·4 or less. When the ratio exceeds 〇5, the light-transmitting fine particles having an extremely large particle diameter are contained, and as a result, the surface haze of the light-diffusing film becomes excessively large, and the surface film is bonded to cause a bubble bite. In case of bad conditions. In addition, the standard deviation of the weight average particle diameter and the particle diameter of the light-transmitting fine particles 1061) is based on the Coulter principle (microporous resistance method), and is measured using a Coulter particle counter (manufactured by Beckman Coulter Co., Ltd.). . The content of the light-transmitting fine particles 1 〇gb of the light-diffusing layer 106 is 20 parts by weight or more and 1 part by weight or less with respect to 100 parts by weight of the light-transmitting resin 106a. In the present invention, the light-diffusing layer is thus 1〇6 contains a relatively large amount of light-transmitting fine particles (light diffusing agent) l〇6b, but the surface treated film 1〇3 is bonded to the light diffusing layer 1 via an adhesive layer or an adhesive layer 1〇4. The surface treatment layer 108 is easily formed by the crucible 6. That is, the surface treatment layer 108 can be surely and easily applied to the light diffusing polarizing plates 100 and 2 without impairing the structure or shape necessary for the surface treatment layer 108 to exhibit a specific optical function. The content of the light-transmitting fine particles i 〇 6b of the light-diffusing layer 106 is preferably 2 parts by weight or more and 70 parts by weight or less, more preferably 25 parts by weight or more and 60 parts by weight based on 100 parts by weight of the light-transmitting resin 106a. In parts below, it is preferably 3 parts by weight or more and 55 parts by weight or less. When the content of the light-transmitting fine particles 16b is less than 20 parts by weight based on 100 parts by weight of the light-transmitting resin, the light diffusibility of the light-diffusing film 102 becomes insufficient, and as a result, light diffusion is applied to the liquid crystal display. In the case of the polarizing plates 100 and 200, it is difficult to obtain a sufficient wide viewing angle performance. When the content of the light-transmitting fine particles 1 〇 6b exceeds 100 parts by weight based on 100 parts by weight of the light-transmitting resin, the haze of the light-diffusing film 102 becomes excessively large, and as a result, the transparency of the light-diffusing film 102 is improved. When the light diffusing polarizing plates 100 and 200 are applied to the liquid crystal display, the front contrast is lowered. 0 156990.doc 201219846 The refractive index difference between the light transmitting fine particles 106b and the light transmitting resin 106a is preferably in the range of 0.04 to 0.15. When the difference in refractive index between the light-transmitting fine particles 1〇讣 and the light-transmitting resin 106a is within the above range, appropriate internal scattering due to the difference in refractive index between the light-transmitting fine particles 106b and the light-transmitting resin 106a occurs. Thus, a light diffusing film 1〇2 having a moderately high light diffusibility can be obtained. Further, the surface of the light-diffusing layer 106 (the surface opposite to the transparent substrate film 1〇5, that is, the surface on the surface of the light-diffusing layer 106 from the far side of the transparent substrate film 1〇5) is preferably only It is formed of the translucent resin crucible 06a. In other words, it is preferable that the light-transmitting fine particles 106b are not protruded from the surface of the light-diffusing layer 1〇6 and are completely buried in the light-diffusing layer 1〇6. Therefore, the thickness of the light-diffusing layer 1〇6 is preferably a weight average particle diameter of the light-transmitting fine particles 16b; More than 3 times and less than 3 times. When the thickness of the light diffusion layer 106 is less than the weight of the light-transmitting fine particles 1〇6b: when the average particle diameter is 1 times, when the light diffusing polarizing plates 100 and 200 are applied to the liquid crystal display, the light diffusion layer is Since the surface of the crucible 6 is too large, there is a case where a problem such as a bubble bite occurs when the surface film is bonded. Further, when the thickness of the light diffusion layer 106 exceeds three times the weight average particle diameter of the light-transmitting fine particles 1〇6b, the thickness of the light diffusion layer ι 6 becomes excessively large, and the light diffusibility of the light diffusion film 102 follows. As a result, when the light diffusing polarizing plate 丨〇〇 and 2 应用 are applied to the liquid crystal display, the front contrast is lowered. In the present specification, the "thickness of the light-diffusing layer" means the maximum thickness from the surface of the light-diffusing layer 1 〇6 close to the side of the transparent base film 1 〇5 to the surface on the opposite side. Therefore, in the case where the light-diffusing layer ι 6 has irregularities in the light-diffusing film 102 of the present invention, the thickest portion corresponding to A which is not shown in Fig. 2 becomes the thickness of the light-diffusing layer ι 6 . In the portion from the side of the light-diffusing layer 156990.doc 201219846 106 which is close to the side of the transparent substrate film 1 〇5 to the opposite side, the thickness of the light-diffusing layer 1〇6 may not be The light-transmitting fine particles 106b have a weight average particle diameter of at least one time. The thickness of the light diffusion layer 106 is preferably in the range of μμηι. When the thickness of the light-diffusing layer 106 is less than 1 μm, the light-diffusing film 1〇2 disposed on the visual side of the liquid crystal display device is not provided with a sufficient level of scratch resistance. In the case where the thickness exceeds 30 μm, the amount of curl generated in the produced light-diffusing film 102 becomes excessively large, and the workability in the manufacturing process of the light-diffusing polarizing plate 丨〇〇, 200 is deteriorated. The surface shape of the light diffusion layer 106 may also include a flat surface as shown in FIG. 1 or FIG. 2, or may include a concave-convex surface, but the degree of the unevenness (the roughness of the surface unevenness) is preferably by an adhesive layer or The layer of the agent fills the unevenness of the layer. The total haze of the light-diffusing film 102 is preferably 3% or more and 70% or less, and the internal haze is 30. /. Above and above 70%. The "total haze" is a total light transmittance (Tt) indicating the total amount of light transmitted through the light diffusion film 1 〇 2 and diffused light transmittance which is diffused and transmitted by the light diffusion film 102. The ratio of (Td) is obtained by the following formula: Total haze (%) = (Td/Tt) x 1 〇〇 (!). The total light transmittance (Tt) is the sum of the parallel light transmittance (Tp) and the diffused light transmittance (Td) transmitted while being in a state of being coaxial with the incident light. The total light transmittance (Tt) and the diffused light transmittance (Td) are values measured in accordance with JIS K.7361. 156990.doc -13·201219846 The "internal haze" of the light-diffusing film 102 refers to the haze of the surface shape of the surface on the light-emitting surface side of the surface of the light-diffusing layer 106 in the total haze (surface fog) Haze outside the degree). When the total haze and/or internal haze is less than 30%, the light scattering property is insufficient, and sufficient wide viewing angle performance cannot be obtained. Further, when the total haze and/or the internal haze exceeds 70%, the light scattering property is enhanced, and when the light diffusing polarizing plates 100 and 200 are applied to the liquid crystal display, the front contrast is lowered. Further, when the total haze and/or the internal haze exceeds 7 %, the transparency of the light diffusing film 102 tends to be impaired. More preferably, the total haze and the internal haze are 35% or more and 65% or less, respectively. The total haze, internal haze, and surface haze of the light diffusing film 102 are specifically measured as follows. That is, first, an optically transparent adhesive is used to prevent warpage of the film, and the light diffusing film 102 is used for the light diffusing film 102. The surface on the side of the transparent base film 105 was bonded to a glass substrate so that the light-diffusion layer 1〇6 became a surface, and a sample for measurement was produced, and the total haze value was measured for the sample for measurement. The total haze value is determined by using a haze transmittance meter according to JIS K 7136 (for example, a haze meter "HM_丨5 制造" manufactured by the Murakami Color Technology Research Institute of the company) to measure the total light transmittance (Tt) and diffusion. The light transmittance (Td) is calculated by the above formula (1). Then, on the surface of the light-diffusing layer 1〇6, a cellulose triacetate film having a haze of almost 〇% was applied thereto using glycerin, and the haze was measured in the same manner as in the measurement of the total haze described above. Since the surface haze caused by the surface shape of the surface on the light exit surface side of the surface of the light diffusion layer 1〇6 is almost canceled by the bonded cellulose triacetate film, the haze can be regarded as the light diffusion film 1〇2. "Internal haze". 156990.doc -14· 201219846 Therefore, the "surface haze" of the light diffusing film 102 is represented by the following formula (2): Surface haze (%) = total haze (%) - internal haze (%) (2) ) and seek. Further, the light diffusion film 102 may have another layer (including an adhesive layer) between the transparent substrate film 105 and the light diffusion layer 106. Next, a method for manufacturing the light-diffusing film 102, which is a method of coating a resin liquid in which the light-transmitting fine particles 106b are dispersed, on the transparent base film 1B can be described. form. The resin liquid contains the light-transmitting fine particles 16b, the light-transmitting resin 1〇6a constituting the light-diffusing layer 1〇6, or a resin forming the same (for example, an ionizing radiation-curable resin, a thermosetting resin, a thermoplastic resin or a metal) Alkoxides, and other components such as solvents may be included as needed. In the case where an ultraviolet curable resin is used as the resin for forming the light-transmitting resin 1 〇 6a, the above resin liquid contains a photopolymerization initiator (a radical polymerization initiator as a photopolymerization initiator, and for example, acetophenone can be used. Photopolymerization initiator, benzoin photopolymerization initiator, dimercapto ketone photopolymerization initiator, thioxanthone photoreduction starting oxime, diazine photopolymerization initiator, oxadiazole light a polymerization initiator, etc. Further, as a photopolymerization initiator, for example, 2,4,6-trimethyl adenylthiodiphenylphosphine oxide, 2,2,_bis (〇-chlorophenyl) can also be used. )_4,4,,5,5,_tetraphenyl-I,2'-imidazole, 1〇-butyl-2·chloroacridone, 2_2_ethylhydrazine, diphenylethylenediazine, 9, 1 0-phenanthrenequinone, camphorquinone, methyl phenylglycolate, titanocene compound, etc. The amount of the photopolymerization initiator to be used is usually 0.5 to 20 by weight based on 100 parts by weight of the resin contained in the resin liquid. Preferably, it is 1 to 5 parts by weight. Further, I56990.doc -15-201219846 'In order to make the optical characteristics and surface shape of the light-diffusing film 102 homogenized' is preferably in a resin solution. The dispersion of the photofine particles 6b is dispersed in an isotropic manner. The resin liquid is applied onto the transparent substrate film 105 by, for example, a gravure coating method, a micro embossing roll coating method, or a bar coating method. The method is applied by a knife coating method, an air knife coating method, an anastomosis coating method, a die coating method, etc. The coating of the resin liquid is preferably a thickness of the light diffusion layer 1〇6 as described above. The coating film thickness is adjusted so that the weight average particle diameter of the light-transmitting fine particles 106b is i times or more and three times or less. The coating property of the resin liquid can be improved or the adhesion to the light diffusion layer 1〇6 can be improved. For the purpose, various surface treatments are applied to the surface of the transparent base film 1〇5 (the surface on the side of the light diffusion layer 1〇6). Examples of the surface treatment include corona discharge treatment, glow discharge treatment, acid surface treatment, and alkali surface treatment. The treatment, the ultraviolet irradiation treatment, etc. Further, another layer such as a plasma layer (easily adhesive layer) may be formed on the surface of the transparent base film 1〇5, and a resin liquid may be applied to the other layer. Increasing the adhesion of the transparent substrate film 1〇5 to the polarizing film 1〇1, and Preferably, the surface treatment is performed on the surface on the opposite side of the surface of the light diffusion layer 1G6 side of the transparent substrate film 1G5. The light diffusion film 102 can also be formed by a method comprising the following steps, namely, on the transparent substrate film 1G5. a step of applying a resin liquid in which the light-transmitting fine particles are dispersed, and a step of transferring the mirror surface or the uneven surface of the mold to the surface of the layer formed of the resin liquid. For example, having a flat surface as shown in FIG. The light diffusing layer can be formed by attaching the mirror surface of the mirror-shaped mold (mirror mold) 156990.doc -16-201219846 to the surface of the layer formed by the resin liquid. The light-diffusing layer 6 having a concave-convex surface shape as shown in FIG. 2 can be adhered to the surface of the layer formed of the resin liquid by the uneven surface of the mold having an uneven surface (die for embossing) The transfer concave and convex surface is formed. The mirror mold can also be a mirror metal roll, and the embossing mold can also be a metal roll for embossing. When an ionizing radiation curable resin, a thermosetting resin, a thermoplastic resin or a metal alkoxide is used as the resin for forming the light-transmitting resin 1〇6a, a layer containing the above resin liquid is formed, and if necessary, it is carried out. Drying (removing the solvent), and if necessary, by irradiating the surface or the uneven surface of the mold to the surface of the layer of the layer of the 匕3 〇 树 树 ,, by the ionizing radiation (using ionization) The layer containing the resin liquid is cured by heating (in the case of using a thermosetting resin or a metal alkoxide) or cooling (in the case of using a thermoplastic resin). The ionizing light ray may be appropriately selected from ultraviolet rays, electron beams, near ultraviolet rays, visible rays, near infrared rays, infrared rays, X rays, etc. depending on the kind of the resin contained in the resin liquid, but these are preferably ultraviolet rays. The electron beam is particularly preferably ultraviolet light in terms of simple operation and high energy. As the light source of the off-line, for example, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh pressure mercury lamp, a carbon arc lamp, a metal toothed lamp, a xenon lamp, or the like can be used. Further, an ArF excimer laser, a KrF excimer laser, an excimer lamp, or a synchrotron radiation may be used. Preferably, ultrahigh pressure mercury lamps, high pressure mercury lamps, low pressure mercury lamps, xenon lamps, and metal halide lamps are used. 156990.doc •17- 201219846 Also, as electron beam, it can be cited from Kirklaw-Walton, Van de Graaff, resonant transformer, insulator, linear, high-frequency high-pressure accelerator. An electron beam having an energy of 50 to 1000 keV, preferably 1 to 300 keV, emitted by various electron beam accelerators such as a high frequency type. Next, a preferred embodiment for producing the light-diffusing film 102 will be described. The manufacturing method of the preferred embodiment includes the steps of continuously feeding a transparent substrate film 105 wound into a roll shape to continuously produce light diffusion. The film 102 is coated with a resin liquid in which the light-transmitting fine particles 丨06b is dispersed, and dried as needed; the layer formed of the resin liquid is cured; and the obtained light-diffusing film 102 is taken up. This manufacturing method can be carried out using, for example, the manufacturing apparatus shown in Fig. 3. First, the transparent substrate film 1〇5 is continuously wound up by the unwinding device 301. Then, the resin liquid in which the light-transmitting fine particles 1 〇 6b are dispersed is applied by using the coating device 3〇2 and the supporting roller 303 opposed thereto on the transparent base film 1〇5 which is wound up. Next, when the solvent is contained in the resin liquid, the transparent substrate film 105 coated with the resin liquid is dried by passing through the dryer 304. Then, the transparent base film 5 is provided with a layer formed of a resin liquid so that the layer formed of the smear resin liquid is in close contact with the mirror metal roll or the metal roll 305 for embossing to the mirror metal. The metal roll 305 for roll or embossing is wound up between the pin 306 and the pinch 306. Thereby, the mirror surface of the mirror metal roll or the concave surface of the metal roll for embossing is transferred onto the surface of the layer formed of the resin liquid. Then, the layer formed of the resin liquid on the transparent base film 105 is in close contact with the mirror metal roll or the embossing metal roll 3〇5, and passes through the transparent substrate film 105 from the ultraviolet irradiation device 3. 〇8 irradiates the ultraviolet 156990.doc • 18 · 201219846 line, whereby the layer formed of the resin liquid is solidified to form the light diffusion layer 6 . Since the irradiated surface is heated to a high temperature by ultraviolet irradiation, the mirror metal roll or the metal roll 305 for embossing preferably has a surface for adjusting the surface temperature to room temperature to 8 (about TC). Further, one or a plurality of ultraviolet irradiation devices 308 may be used. The transparent substrate film 1〇5 (light diffusion film 1〇2) on which the light diffusion layer 106 is formed is self-mirror metal by the peeling roller 3〇7. The roll or embossing process is performed by a metal roll 305. The light diffusion film 102 manufactured as described above is taken up by the winding device 3〇9. In this case, the light diffusion layer 106 may be protected from the light diffusion layer. The surface of the 1〇6 surface is attached to the surface film formed of polyethylene terephthalate or polyethylene by a re-peelable adhesive layer, and the light diffusion film 1〇2 is wound up. After being peeled off from the mirror metal roll or the metal roll 305 for embossing by the peeling roller 307, ultraviolet irradiation may be additionally performed. Further, it may be replaced by a metal roll for mirror metal or a metal roll for embossing. 5 UV is carried out in close contact with the layer formed by the resin liquid After the irradiation, the transparent base film 1 having a layer formed of the uncured resin liquid (> 5 is peeled off from the mirror metal roll or the metal roll 3〇5 for embossing), and then irradiated The layer formed of the resin liquid is cured by the ultraviolet ray. The light-diffusion film 102 and the polarizing film 1〇1 are bonded to each other via an adhesive layer, etc. The light-diffusion film 102 also functions as a protective film of the polarizing film 1〇1. This configuration is advantageous for thinning of the light diffusing polarizing plates 1 and 200. The bonding of the light diffusing film 1〇2 and the polarizing film 101 with an adhesive can be used with the film 103 and the light diffusing film 1 at the surface. The bonding agent of 2 and the same adhesive as described later is carried out by the same method. 156990.doc 19 201219846 (surface treatment film) The surface treatment film 103 is a film which is optically treated on one side of the transparent resin film. Specifically, a film having a surface treatment layer having a desired optical function may be formed on one of the faces of the transparent resin film 1 to 7. As the transparent resin film 107, an acetate fiber containing, for example, TAC (cellulose triacetate) may be used. Prime resin, polyacrylic acid a resin film such as a propylene resin such as an ester, a polycarbonate resin, or a polyester resin such as polyethylene terephthalate. The thickness of the transparent resin film 1〇7 is, for example, 1 〇 to 5 μμβ, preferably. The surface treatment film 103 may, for example, be an anti-glare film whose surface layer 108 is an anti-glare layer having irregularities on the surface, and utilizes diffuse reflection caused by the unevenness on the surface. Reducing or preventing external light from being reflected into the display screen (ie, 'the above optical processing is anti-glare treatment); or an anti-reflection film whose surface treatment layer 108 is an anti-reflection layer' by reducing or preventing external light incident on the display screen The reflection reduces or prevents external light from being reflected into the display screen (i.e., the optical processing described above is an anti-reflection process). The anti-glare film may be, for example, a mold which has an ultraviolet curable resin composition with or without fine particles coated on the resin film 107, and a mold having a specific surface uneven shape. The uneven surface (4) is formed on the ultraviolet curable resin layer formed, and the ultraviolet curable resin layer is cured (4) to have a specific surface unevenness and an antiglare layer; or by coating the transparent resin film m The ultraviolet curable resin composition containing fine particles of the cloth is formed by solidifying the applied ultraviolet curable resin layer without using a mold, and is solidified to give a specific surface formed by the fine particles 156990.doc •20· 201219846 The anti-glare layer of the bump. A commercially available anti-glare film can also be used as the anti-glare film. As the anti-reverse (four), for example, a low refractive index layer having a material having a refractive index lower than that of the light diffusion layer 106 as an antireflection layer, or having a refractive index higher than that of the light diffusion layer 1〇6 A laminate of a low refractive index layer of a material having a high refractive index of a material having a high refractive index and a refractive index lower than a refractive index of the high refractive index is used as an antireflection layer. The low refractive index layer may be a microparticle (hollow alumina microparticles, etc.) containing a void such as a shovel, a metallographic microparticle (10), a MgF, a 3 esthetic, a sputum, etc., a fluoropolymer. Such as low refractive index materials, and adhesive resin. The adhesive resin may be as previously known, and may be a polysulfide resin, a hydrolyzate of a shixixuan oxide, a light or thermosetting multi-branched compound (dendrimer or hyperbranched polymer, other light or _ A pure resin may be inserted between the transparent resin film 107 and the low refractive index layer or the high refractive index layer, or other types such as a hard coat layer or a charge prevention layer may be inserted. Commercially available antireflection may also be used. The film is used as an antireflection film. (Adhesive layer, adhesive layer) In the light diffusing polarizing plate 1〇〇, 2〇〇 of the present invention, the surface treated film (8) is usually close to the surface treated layer of the transparent tree 1G7. The surface on the opposite side of the side of (10) (the surface of the optical treatment which is not subjected to the surface treatment film 1〇3 is bonded to the light diffusion layer 106 via the adhesive layer or the adhesive layer 104. The collar is formed as an adhesive layer. The adhesive of 104 can be used, for example, a propylene-based adhesive, a urethane-based adhesive, a polyoxyl 156990.doc • 21 · 201219846, etc. Among them, transparency, stress, reliability Rework, etc. Preferably, a propylene-based adhesive is preferably used. The adhesive layer 104 can be applied to light by a die coater or a gravure coater by using such an adhesive as, for example, an organic solvent solution. In addition to the method of dissolving and diffusing the diffusion layer 〇6 or the transparent resin film H)7, it is also possible to bond the sheet formed on the plastic film (referred to as a separator) subjected to the release treatment. (4) It is provided by the method of printing on the light diffusion layer 106 or the transparent resin film 1 to 7. The thickness of the adhesive layer is usually in the range of 2 to 40 μm. Further, as an adhesive for forming the adhesive layer 104, Jingyu does not The appearance of the light diffusing polarizing plates 100 and 200 is adversely affected, and the higher the subsequent strength, the surface treated film 1〇3 and the light diffusing film 1〇2, can be preferably used. An active energy ray such as a resin composition or an adhesive for a thermosetting resin composition, or a water-based adhesive containing a polyvinyl alcohol-based resin or an urethane resin as an adhesive component, etc., wherein a drying step can be achieved. Production efficiency It is more preferable to use an adhesive containing a curable resin composition containing an epoxy resin in order to obtain a good adhesive strength. A surface treatment film using an adhesive containing a curable resin composition containing an epoxy resin is used. The bonding of the 103 to the light diffusion film 102 can be performed by coating the adhesive on the light diffusion layer 106 or the transparent resin film 1〇7, and laminating the two films via the uncured adhesive layer. The active energy ray is irradiated or heated to thereby cure the uncured adhesive layer. The method of applying the adhesive is not particularly limited, and for example, a squeegee, a wire bar, a die coater, or a doctor blade can be used. Various coating methods such as cloth machine and gravure coating machine 156990.doc •22· 201219846 Since the optimum viscosity range exists in each coating method, the viscosity of the adhesive can also be adjusted using an organic solvent. The thickness of the adhesive layer after curing is usually from 0.1 to 20 μm, preferably from 2 to 1 μm, more preferably from 5 to 5 μη. The bonding surface of the transparent resin film 107 and/or the light diffusion layer ι 6 may be subjected to corona discharge treatment or plasma treatment (formation of a plasma layer) before bonding with an adhesive or an adhesive. Easy to proceed. (Protective film) As shown in FIG. 1 and FIG. 2, the light diffusing polarizing plate of the present invention may be included in the protective film 109 which is laminated on the side opposite to the light diffusing film 1〇2 of the polarizing film 101 via the adhesive layer. . The protective film 109 is preferably a film of a polymer which is excellent in low birefringence and transparency or mechanical strength, thermal stability or water repellency. Examples of such a film include a cellulose acetate resin such as TA c (triacetate cellulose), a propylene resin, a tetrafluoroethylene/hexafluoropropylene copolymer fluorine resin, and a polycarbonate resin. Polyester resin such as polyethylene terephthalate, polyimide resin, polysulfone resin, polyether oxime resin, polystyrene resin, polyvinyl alcohol resin, polyvinyl chloride resin, A resin film such as a polyolefin resin or a polyamide resin. Among these, a triacetate cellulose film or a norbornene-based thermoplastic resin film can be preferably used in terms of polarizability, durability, and the like. Since the norbornene-based thermoplastic resin film has high heat-and-moisture resistance, the durability of the polarizing plate can be greatly improved, and the dimensional stability is high because of its low hygroscopicity. For the forming of the above resin film, a previously known method such as a casting method, a calendering method, or an extrusion method may be used, and the thickness of the protective film 9 is determined, and the limit is 156990.doc -23-201219846, and the polarizing plate is used. From the viewpoint of film formation and the like, it is preferably 5 μμ or less, more preferably 5 to 300 μηι, and further preferably 5 to 15 () μηΐ2. The bonding of the polarizing film 101 and the protective film 109 using an adhesive can be carried out by the same method as the above-mentioned bonding agent with respect to the bonding of the surface treatment film 103 and the light diffusion film 1〇2. Further, an optical compensation film such as a retardation film (phase difference plate) may be attached to the polarizing film 101 instead of the protective film 1〇9. The light diffusing polarizing plates 100 and 200 having the above configuration are typically applied to the liquid crystal display device in such a manner that the surface treatment film 103 is attached to the surface of the polarizing film 101 closer to the visual side than the polarizing film 101. The liquid crystal display device is assembled on the glass substrate of the liquid crystal cell. <Liquid Crystal Display Device> Next, a liquid crystal display device of the present invention will be described. The liquid crystal display device of the present invention includes, in order, a backlight device, a light diffusing mechanism, a backlight side polarizing plate, a liquid crystal cell, and the above-described light diffusing polarizing plate of the present invention. Fig. 4 is a schematic cross-sectional view showing a preferred example of the liquid crystal display device of the present invention. The liquid crystal display device 400 of FIG. 4 is a τν-type liquid crystal display device in a normally-on-state mode, and is provided with a backlight device 4〇2, a light diffusing mechanism 403, a backlight-side polarizing plate 404, and a photo-based polarizing plate. In the light diffusing polarizing plate 405 of the invention, the liquid crystal cell 401 includes a liquid crystal layer 412 and one pair of transparent substrates 4Ua and 4iib disposed on both surfaces of the liquid crystal layer 412. The backlight-side polarizing plate 404 and the light-diffusing polarizing plate 4〇5 are disposed such that the transmission axes thereof are orthogonally polarized. The backlight unit 402 includes a box body having a hexahedron shape with a front opening, 156990.doc -24-201219846, and a direct type backlight device in which a plurality of cold cathode tubes 422 as linear light sources are arranged side by side in the casing 421. Further, the light diffusing means 403 includes a light diffusing plate 403a disposed on the front surface of the backlight device 402, and a light deflecting plate (strip) disposed on the front side of the light diffusing plate 403a (between the light diffusing plate 403a and the backlight side polarizing plate 404). 403b. In the liquid crystal display device 400 of such a configuration, the light emitted from the backlight device 402 is diffused by the light diffusing plate 403a of the light diffusing mechanism 403, and is then applied to the light incident surface of the liquid crystal cell 401 by the light deflecting plate 403b. Specific directivity in the vertical direction (z-axis direction). The directivity to the vertical direction is set higher than the previous device. Further, the light imparted with specific directivity is polarized by the backlight-side polarizing plate 404 and incident on the liquid crystal cell 4?1. The light incident on the liquid crystal cell 401 is controlled by the liquid crystal layer 412 to be in a polarized state and emitted from the liquid crystal cell 401. Then, the light emitted from the liquid crystal cell 4〇1 is diffused by the light-diffusing polarizing plate 405. As described above, in the liquid crystal display device of the present invention, the directivity of the light incident on the light incident surface of the liquid crystal cell 4〇1 (the z-axis direction) of the light incident on the liquid crystal cell 401 in the light diffusing mechanism 4〇3 is set to Higher than the previous one, the incident light is focused on the liquid crystal cell 401, and the light is further diffused by the light diffusing polarizing plate 405. Thereby, image quality excellent in color reproducibility and the like can be obtained as compared with the prior art. The liquid crystal display device 4 of the present invention to which the light diffusing polarizing plate 405 of the present invention is applied has a high viewing angle characteristic and has optical functions other than the light diffusing function imparted to the light diffusing polarizing plate 4〇5. 'And excellent visibility. The constituent parts constituting the liquid crystal display device 4 of the present invention will be described in more detail below in 156990.doc 25-201219846. (Liquid crystal early) The liquid crystal cell 401 includes a pair of transparent substrates 4 11 a, 4 11 b and a liquid crystal layer 412, and the pair of transparent substrates 4 11 a, 411 b are disposed opposite each other by a spacer separated by a specific distance, the liquid crystal layer 412 includes a liquid crystal enclosed between a pair of transparent substrates 411a, 411b. A transparent electrode or an alignment film is laminated on each of the pair of transparent substrates 411a and 411b, and the liquid crystal is aligned by applying a voltage based on the display data between the transparent electrodes. The display mode of the liquid crystal cell 401 is TN type in the above example, but a display mode such as an IPS type or a VA type may be employed. (Backlight Device) The backlight device 402 includes a box body 421 having a hexahedron shape that is open at the front, and a cold cathode tube 422 that is a plurality of linear light sources arranged in parallel in the case 421. The case 421 is formed of a resin material or a metal material, and it is preferable that at least the inner peripheral surface of the case 421 is white or silver from the viewpoint of reflecting light emitted from the cold cathode 422 on the inner peripheral surface of the case 421. . As the light source, in addition to the cold cathode tube, LEDs of various shapes such as a linear shape can be used. In the case of using a linear light source, the number of the linear light sources to be arranged is not particularly limited, and from the viewpoint of suppressing the bright spots of the light-emitting surface, it is preferable that the distance between the centers of the adjacent linear light sources is 丨5 range from 5 claws to 5 claws. Furthermore, the backlight device 4〇2 used in the present invention is not limited to the direct type shown in FIG. 4, and the side surface of the light guide plate may be arranged in a side light type or a planar shape of a linear light source or a point light source. Various types such as light source type. [Light-diffusing mechanism] As shown in FIG. 5, the light-diffusing mechanism 403 preferably includes a light diffusing plate 403a disposed on the front surface of the backlight device 156990.doc • 26·201219846 402, and a light diffusing plate 403a disposed on the front side of the light diffusing plate 403a (light diffusion) The light between the plate 403a and the backlight-side polarizing plate 404 is biased toward the plate (the cymbal) 403b. For example, as shown in Fig. 5, the light diffusing plate 403a may be a film or sheet formed by dispersing a light diffusing agent 440 on the substrate 430. As the substrate 430, a polycarbonate resin, a methyl acrylate resin, a methyl propyl acetonate-styrene copolymer resin, an acrylonitrile-styrene copolymer resin, a methacrylic acid-styrene copolymer can be used. Polyolefin resin such as resin, polystyrene resin, polyvinyl chloride resin, polypropylene glycol or polymethylpentene, cyclic polyolefin resin, polyethylene terephthalate, polyparaphenylene A polyester resin such as butylene glycol dicarboxylate or polyethylene naphthalate, a polyamine resin, a polyarylate resin, or a polyimide resin. Further, the light diffusing agent 440 which is mixed and dispersed in the substrate 430 is not particularly limited as long as it is a material formed of a material having a refractive index different from that of the material of the substrate 430, and may be, for example, a substrate 43 Organic microparticles formed by acrylic resin, melamine resin, polyethylene resin, polystyrene resin, organic fluorenone resin, acrylic acid styrene copolymer resin, etc.; and calcium carbonate, strontium oxide, Inorganic fine particles formed of alumina 'carbonate, barium sulfate, titanium oxide, glass, and the like. The light diffusing agent 440 to be used may be used alone or in combination of two or more. Further, an inner hollow sphere or a glass hollow bead of an organic polymer may be used as the light diffusing agent 44. The weight average particle diameter of the light diffusing agent 440 is preferably in the range of 〇 5 to 3 Å. Further, the shape of the light diffusing agent 440 may be a spherical shape, a flat shape, a plate shape, or the like, but is preferably spherical. On the other hand, the surface of the light deflecting plate (the cymbal) 403b on the light incident surface side (the side of the backlight 156990.doc -27-201219846 is placed on the side of the 402 side, and the side of the negative side of the z-axis shown in Fig. 5) is a flat surface. Further, in a plane on the light exit side (the side opposite to the positive side of the z-axis shown by 05) (the surface facing the backlight-side polarizing plate 404), a plurality of polygonal cross-sections having a tapered end are formed in parallel, preferably The shape of the triangle is 45. The material of the light deflecting plate 403b may, for example, be a polycarbonate resin, ABs (Acryl〇nitrile butadiene styrene) resin, methacryl resin, and methyl phenyl methacrylate. A resin resin such as a dilute copolymer resin, a polystyrene resin, a propylene glycol copolymer resin, or a polyolefin resin such as polyethylene or polypropylene glycol. As a method of producing the optical deflecting plate 4〇3b, a molding method of a thermoplastic resin can be usually used, and for example, hot press forming using a die or extrusion molding can be mentioned. The thickness of the light deflecting plate is usually 0.1 to 15 mm, preferably 〇5 to 1 mm. In the present specification, the term "the thickness of the light deflecting plate" means the maximum thickness from the side of the light deflecting plate hopper (4) close to the side of the light diffusing plate 403a to the tip end of the apex angle of the linear 稜鏡45〇. . Therefore, the thickest portion corresponding to B as shown in Fig. 5 becomes the thickness of the light deflecting plate 403b. The thickness from the side of the light deflecting plate 4 〇 31 Å close to the side of the light diffusing plate 403 a to the front end of the apex angle of the linear 稜鏡 45 并非 is not the largest part (for example, the valley of the line 稜鏡 45〇) In part, the thickness of the light deflecting plate 403b may not be in the above range. The light diffusing plate 403a and the light deflecting plate 4〇3b may be integrally formed, or may be joined after being separately produced. Further, in the case of separately forming and joining, the air diffusion plate 403a and the light deflecting plate 4〇3b may be in contact with each other with an air layer interposed therebetween. Further, the light diffusing plate 4〇3a and the light deflecting plate 4〇3b may be disposed separately. As shown in Fig. 6, the light diffusing means 403 may be provided with a light diffusing function by dispersing and mixing the light diffusing agent 440 in the deflecting plate 403b which functions as a light deflecting function. Further, as shown in Fig. 7, the light diffusing means 403 may have two light deflecting plates (strips) 4, 3b, and 403b disposed on the front side of the light diffusing plate 403a. In this case, referring to Fig. 7, it is preferable that the light deflecting plate 403b disposed on the side close to the light diffusing plate 403a has the direction of the ridge line 451 of the linear ridge 450 and the transmission axis direction of the backlight side polarizing plate 404 (y The axial direction is substantially parallel, and the light deflecting plate 403 b ′′ disposed on the front side of the light deflecting plate 403 b is in the direction of the ridge line 45 1 ′ of the linear 稜鏡 430 ′ and the light diffusing polarizing plate 405 . The transmission axis direction (X-axis direction) is substantially parallel. With such a configuration, the brightness in the front direction of the liquid crystal display device can be further improved. Alternatively, the light deflecting plate 4〇313 may be disposed such that the direction of the ridge line 45Γ of the linear prism 450 is substantially parallel to the transmission axis direction (y-axis direction) of the backlight-side polarizing plate 4〇4, and the light is deflected. The direction of the ridge line 451 of the linear ridge 450 of the plate 403b is substantially parallel to the transmission axis direction (X-axis direction) of the light diffusing polarizing plate 405. The light distribution characteristic of the light by the light diffusing means 403 is preferably inclined by 7 自 from the perpendicular direction (the z-axis direction shown in Fig. 4) of the light incident surface of the liquid crystal cell 401. The luminance value in the direction is equal to or less than the front luminance value, that is, the reception value in the direction perpendicular to the light incident surface of the liquid crystal cell 4〇1, and the light emitted from the light diffusion mechanism includes non-parallel light. More preferably, the light distribution characteristics are not more than 6 turns with respect to the perpendicular to the light incident surface of the liquid crystal cell 401. The light that emerges in the direction. Generally, as shown in Fig. 4, the back surface (light incident surface) of the light diffusing means 4?3 is arranged in parallel with the light incident surface of the liquid crystal cell 401. The month is 7 相对 with respect to the perpendicular line of the light incident surface of the liquid crystal cell 401. The luminance value in the direction is, for example, as shown in FIG. 8 , when the longitudinal direction of the light diffusing means 4 〇 3 is set to the X direction, and the surface parallel to the back surface (light incident surface) of the light diffusing means 403 is xy plane. The value of the enthalpy in the direction which is 7 而成 with respect to the z-axis perpendicular to the "surface" is preferably a value of 7 C degrees in the direction formed by the x-axis and the two-axis. In order to set such a light distribution characteristic, for example, the linear shape of the cross-sectional triangular shape of the light deflecting plate 4〇3b can be adjusted (and/or the shape of the linear shape can be adjusted. Linear shape 45〇' 45〇 The apex angle θ (refer to FIG. $ and FIG. 6) is preferably in the range of 60 to 120. More preferably, it is 9 〇 to u 〇. The shape of the triangle is equilateral or unequal, but In the case where the vertical direction of the liquid crystal cell 4〇1 (the front direction of the liquid crystal display device, that is, the z-axis direction) is concentrated, it is preferable that the isosceles-angular rise v and the top surface including the linear prism is preferably provided. The bottom edges which are opposite to the apex angles of the triangles are arranged in order to be adjacent to each other, and the plurality of linear prisms are arranged in such a manner as to be substantially parallel to each other. In this case, as long as the condensing ability does not significantly decrease, the apex of the linear prism and the adjacent linear 稜鏡 (4) can be curved, and the distance between the ridges of the linear prism (Fig. 5) And the distance sentence shown in FIG. 6 is usually in the range of 10 μηι to 500 μηη, preferably in the range of 3〇μιη~2〇〇. The so-called non-parallel light system refers to the self-light diffusing mechanism 4 as shown in FIG. The light emitted from the circle having a diameter of 1 cm on the exit surface of the 〇3 is observed as a projection image of the observation surface parallel to the exit surface 1 m away from the perpendicular direction of the exit surface, and has an in-plane luminance distribution of the projected image. The light having the minimum half width value of 3 〇cm or more is emitted. 156990.doc -30-201219846 (Backlight side polarizing plate) As the backlight side polarizing plate 404, one or both surfaces of the polarizing film can be generally bonded. As the polarizing film and the protective film, the light diffusing polarizing plates 100 and 200 can be used as described above. (Phase plate) The liquid crystal display device of the present invention can include the phase difference plate 406 as shown in Fig. 10. Fig. 1液晶The liquid crystal display device 4〇〇, The difference plate 4〇6 is disposed between the backlight-side polarizing plate 404 and the liquid crystal cell 4〇1. The phase difference plate 4〇6 is substantially perpendicular to the surface of the liquid crystal cell 401 (z-axis direction). Zero, and does not exert any optical effect from the front, and exhibits a phase difference when viewed from the oblique direction, and compensates for the phase difference generated by the liquid crystal cell 4〇1. Thereby, the wider viewing angle can be obtained. Excellent display quality and color reproducibility. The phase difference plate 406 can be disposed between the backlight-side polarizing plate 4〇4 and the liquid crystal cell 401, and between the light-diffusing polarizing plate 4〇5 and the liquid crystal cell 4〇 or The retardation plate 406 may be laminated on the protective film of the backlight-side polarizing plate 4〇4 or may be laminated on the polarizing film of the backlight-side polarizing plate 404 as a function of the protective film. The same applies to the case where the phase difference plate is disposed between the light diffusing polarizing plate 4〇5 and the liquid crystal cell. The phase difference plate 406 is formed by, for example, forming a film of a polycarbonate resin or a cycloolefin-based polymer resin, and further biaxially stretching the film; and applying a liquid crystal monomer to the film, and borrowing It is obtained by photopolymerization and immobilization of molecular alignment. Since the phase difference plate 406 optically compensates the arrangement of the liquid crystals, the refractive index characteristics opposite to the liquid crystal alignment are used. Specifically, in the liquid crystal cell of the TN mode, for example, 156990.doc • 31 - 201219846 WV (wide viewing) film (manufactured by Fujifilm Co., Ltd.); and STN (Super Twisted Nematic) can be preferably used. In the liquid crystal cell of the super-twisted nematic gas, it is preferable to use, for example, an r LC (Liquid Crysta®, liquid crystal) film (manufactured by Nippon Oil Corporation); in the liquid helium unit of the zps mode, For example, a biaxial retardation film is preferably used; in a liquid crystal cell of the VA mode, for example, a phase difference plate or a biaxial retardation film in which an A plate and a slab are combined; in a 71-unit mode, In the liquid crystal cell, for example, "WB film for 〇CB (0ptica Uy compensated)" (manufactured by Fujifilm Co., Ltd.) or the like can be preferably used. EXAMPLES Hereinafter, the present invention will be described in further detail with reference to examples but the present invention is not limited to the examples. Further, the method of measuring the haze of the light-diffusing film, the thickness of the light-diffusing layer, and the weight-average particle diameter of the light-transmitting fine particles used in the following examples is as follows. (a) Haze The measurement film prepared by bonding the transparent substrate film side to the glass substrate using an optically transparent adhesive was used to measure the light diffusion film. For the measurement of the total haze value and the internal haze, a haze permeation meter according to JIS K 7136 (a haze meter "ΗΜ·15〇" manufactured by the Institute of Color Technology, Inc.) was used. From the results, the surface haze was calculated by the above formula (7). (b) Thickness of the light-diffusing layer The thickness of the light-diffusing film was measured using a DIGIMICR(R) MH15 (body) manufactured by Nikon Corporation and a zc_1 〇1 (four-digit device), and the thickness of the substrate was subtracted from the thickness of the measured layer by 80 μm. The thickness of the light diffusion layer was measured. 156990.doc -32- 201219846 (C) The standard deviation of the weight average particle size and particle size of the light-transmitting fine particles according to the Coulter principle (microporous resistance method)' using the Coulter particle counter (Beckman Coulter) Manufactured). [Production of metal roll] (Production of metal mirror roll) Industrial surface chrome processing was performed on the surface of a 200 mm diameter iron roll (STKM13A according to JIS), and then the surface was mirror-polished to produce a mirror-finished roll. The Vickers hardness of the chrome surface of the mirror-finished metal roll obtained was 1000 ° Vickers hardness measured using an ultrasonic hardness meter MIC10 (manufactured by Krautkramer Co., Ltd.) in accordance with JIS z 2244. (Production of metal embossing roll) A copper-plated ballard was prepared for the surface of an iron roll (JIS STKM13A) having a diameter of 200 mm. The copper-plated ballard is formed of a copper-plated layer/thinner silver-plated layer/surface copper layer. The thickness of the plating layer as a whole is about 2 μm. The surface of the copper was mirror-polished, and the spraying surface was used on the polishing surface (manufactured by the company) to have a jet pressure of 5 MPa (the surface pressure 'below the same), and the amount of fine particles used was 16 g/cm 2 ( The zirconia beads TZ_B丨25 (average particle diameter: 125 pm) was produced by spraying the zirconia beads TZ_B丨25 (the average particle diameter: 125 pm) in the same manner as the surface area per 1 cm2 of the rolls, and irregularities were formed on the surface. On the uneven surface, the oxidized beryllium Tz_sx_17 (East Shuttle) was sprayed at a spray pressure of 0.1 MPa (surface pressure, the same applies hereinafter) and the amount of fine particles used was 4 g/cm 2 on the uneven surface. Made by the company, the average particle size: 20 μηη) and fine-tuned the surface roughness. The obtained copper-plated iron roll having irregularities was etched with vaporized copper liquid 156990.doc •33-201219846 (etching amount: 3 μιη). Thereafter, chrome plating (chromium plating thickness: 4 μπ〇 was used to prepare a metal embossing roll. The obtained chrome surface of the metal embossing roll had a Vickers hardness of 1000 (Vickers hardness measurement method and the above) [Same]) [Production of surface treatment film] (Production Example 1: Preparation of antiglare film) 60 parts by weight of pentaerythritol triacrylate and polyfunctional amino phthalate ethyl acrylate (hexamethylene diisocyanate and pentaerythritol) 40 parts by weight of a reaction product of a triacrylate was mixed with a propylene glycol monoterpene ether solution, and adjusted to have a solid content concentration of 60% by weight to obtain an ultraviolet curable resin composition. Next, 'relative to the above ultraviolet curing property 100 parts by weight of the solid content of the resin composition 'added as a photopolymerization initiator r] Lucirill® (manufactured by BASF Chemical name: 2,4,6-trimethylphenylsulfonyldiphenylphosphine oxide) 5 parts by weight of 'coating liquid was prepared by diluting with propylene glycol monomethyl ether so as to have a solid concentration of 6 〇 by weight. The coating liquid was applied to a cellulose triacetate (TAc) film having a thickness of 8 pm. On the bright resin film, it was dried in a dryer set to 80»c for one minute. The dried transparent resin film was pressed by a rubber roller so that the ultraviolet curable resin composition layer became the roll side, and was adhered thereto. In this state, the surface of the embossing roll of the metal is irradiated with light of a high-pressure mercury lamp having a strength of 2 〇 mW/cm 2 from the side of the transparent resin film by an amount of 300 mj/cm 2 in an x-ray conversion light meter. The anti-glare film is formed on the transparent resin film by curing the resin composition layer. (Production Example 2 • Preparation of anti-reflection film) 156990.doc • 34 · 201219846 Dipentaerythritol triacrylate 10 parts by weight of pentaerythritol tetraacrylate, 30 parts by weight of urethane urethane ("UA-306T" manufactured by Kyoeisha Chemical Co., Ltd.), "Irgacurel 84" as a photopolymerization initiator (Ciba Japan shares) 25 parts by weight of the product, 50 parts by weight of mercaptoethyl ketone as a solvent, and 5 parts by weight of mercaptoethyl ketone are mixed to prepare a hard coat layer as a composition of an ultraviolet curable resin. The coating liquid was applied onto a transparent resin film (refractive index 149) of a TAC film having a thickness of 8 μm by a bar coater, and dried in a dryer set to 8 ° C. One minute. With respect to the dried transparent resin film, a metal-based lamp was irradiated with a 120 W output from a distance of 20 cm for 10 seconds, thereby forming a hard coat layer. The thickness is 5 μηη, and the refractive index is 1.52. Next, isopropanol, hydrazine 1 hydrazine hydrochloric acid is added to tetraethoxy decane, and hydrolysis is carried out, thereby obtaining a polymer of tetraethoxy decane containing an oligomer. Solution. The cerium-doped tin oxide (yttrium) fine particles having a primary particle diameter of 8 nm were mixed in the solution, and isopropyl alcohol was added thereto, thereby obtaining 2.5% by weight of the polymer containing tetraethoxy decane and cerium-doped tin oxide fine particles 2. 5 The coating liquid for forming a charging prevention layer of % by weight. On the other hand, the TAC film formed with the hard coat layer was immersed in a 50 t 1.5 N-NaOH aqueous solution for 2 minutes, subjected to alkali treatment, washed with water, and then immersed in a 0.5 wt% H 2 S 4 aqueous solution at room temperature for 3 sec. Neutralization is carried out, followed by washing with water and drying. The coating liquid for forming a charging prevention layer is applied onto an alkali-treated hard coat layer by a wire bar coater, and is set to 12 〇t "drying in a dryer - a child, thereby forming a charged Prevent layers. The obtained charge-preventing layer has a thickness of 163 nm, a refractive index of 156990.doc • 35-201219846, a rate of 1.53', and an optical film thickness of 25 〇 nm, followed by 'tetraethoxy decane and ^丨^^^^^ perfluorooctyl A mixture of 95:5 (mole ratio) of trimethyl methoxy hydrazide _ isopropyl alcohol, hydrazine n-hydrochloric acid was added, and hydrolysis was carried out to thereby obtain a polymer of an organic hydrazine compound containing an oligomer. In this solution, a low refractive index alumina particle having a void therein is mixed, and isopropyl alcohol is added, thereby obtaining a low refractive index layer containing 2% by weight of the organic telluride and 2% by weight of the low refractive index alumina fine particles. Use a coating solution. The obtained coating liquid for forming a low refractive index layer was applied onto a charging prevention layer by a wire bar coater, and dried in a dryer set to 12 Torr to form a low refractive index layer. The obtained low refractive index layer has a thickness of 91 nm, a refractive index of 丨.", and an optical film thickness of 125 nme is produced by the above method. The transparent resin film contains a hard coat layer, a charge prevention layer, and low refraction. Anti-reflection film of the rate layer. [Production of Light-Diffusing Film] (Production Example 3: Preparation of Light-Diffusing Film a) Pentaerythritol triacrylate 0 to 6 parts by weight and polyfunctional amine-based acid acetated acrylic acid (from 40 parts by weight of a reaction product of a sub-f-diisocyanate and a pentaerythritol triacrylate) was mixed with a propylene glycol monoterpene ether solution, and adjusted to have a solid content concentration of 60% by weight to obtain an ultraviolet curable resin composition. The refractive index of the cured product after removing the propylene glycol monomethyl bond from the composition and ultraviolet curing is 153. Next, 35 parts by weight of the solid component of the ultraviolet curable resin composition is added as 35 parts by weight. Light-transmitting microparticles having a weight average particle diameter of 6.0, a standard deviation of 2.19_, a polystyrene-based particle, 156990.doc-36-201219846, and a 5-fold aliquot as a photopolymerization initiator "Lucirin τρ〇" (manufactured by BASF Corporation, chemical name: 2,4,6_trimethylbenzylthiodiphenylphosphine oxide)' diluted with propylene glycol monomethyl ether in a solid concentration of 60% by weight A coating liquid was prepared. This coating liquid was applied onto a TAC film (transparent resin film) having a thickness of 80 μm, and dried in a dryer set at 80 ° C for one minute. The dried transparent resin film is pressed by a rubber member so that the ultraviolet curable resin composition layer is on the roll side, and is adhered to the mirror surface of the metal mirror roll. In this state, the light from the high-pressure mercury lamp having a strength of 20 mW/cm 2 is irradiated from the transparent resin film side in the amount of 3 〇〇 mJ/cm 2 in terms of the amount of the h-ray, and the ultraviolet curable resin composition layer is cured to obtain A light diffusion film A comprising a light diffusion layer and a transparent substrate film on a flat surface. (Production Example 4: Production of Light-Diffusing Film B) The same procedure as in Production Example 3 was carried out except that the ultraviolet-curable resin composition layer of the transparent base film after drying was not adhered to the mirror surface of the metal mirror roll. Light diffusion film B. The haze of the light-diffusing films A and B, the thickness of the light-diffusing layer, and the like are summarized in Table 1. 156990.doc •37· 201219846 [Table 1] -----___ Translucent microparticles ------- Weight average particle size a (i-im) Light diffusion film A Light diffusion film B 6.0 6.0 Standard deviation ^ b(nm) 2.19 2.19 b/a 0.37 0.37 Formulation amount 重量 (parts by weight) 35 35 Thickness of the 犷 犷 layer----(_ 13.5 14.3 —^ Haze (%) 60.3 55.1 Haze (%) 59.9 37.0 ----^ Haze (°/〇) 0.4 18.1 Ό is a value of 固体(9) parts by weight relative to the solid content of the ultraviolet curable resin composition. <Example 1> After the surface of the transparent substrate film of the light-diffusing film obtained in Production Example 3 was subjected to corona treatment, 'the ultraviolet curable % oxygen resin was coated on the corona-treated surface with a thickness of 4 The ultraviolet curability of the photocationic polymerization initiator is as follows. On the other hand, the TAC film (thickness 80 μm) as a protective film is subjected to corona treatment on one side, and then coated on a power-treated surface at a thickness of 4 μm. The same ultraviolet curable adhesive agent, and then the ruthenium is adsorbed to the polyvinyl alcohol-based resin which is stretched by the single sleeve, and the light diffusion is layered on one of the surface of the formed polarizing film via the adhesive layer. The film was laminated, and the above protective film was laminated on the other side via its adhesive, and sandwiched using a pair of nippers. Thereafter, ultraviolet rays were irradiated from the protective film side to cure the two adhesive layers to obtain a light diffusing polarizing plate. 156990.doc •38-201219846 Next, the anti-glare film obtained in Production Example 1 is passed through the transparent resin film side as a bonding surface on the light-diffusing layer of the light-diffusing film A of the light-diffusing polarizing plate. A general-purpose acrylic transparent adhesive is laminated, and a light diffusing polarizing plate which is subjected to an anti-glare treatment is used. <Example 2>

A light diffusing polarizing plate subjected to an antiglare treatment was obtained in the same manner as in Example 1 except that the light diffusing film B obtained in Production Example 4 was used instead of the light diffusing film A. <Example 3> A light diffusing polarizing plate 8 which was subjected to antireflection treatment was obtained in the same manner as in Example 1 except that the antireflection film obtained in Production Example 2 was used instead of the antiglare film. In the same manner as in Example 1, except that the light-diffusing film B obtained in Production Example 4 was used instead of the light-diffusing film A, and the anti-reflection film obtained in Production Example 2 was used instead of the anti-glare film, antireflection was obtained in the same manner as in Example 1. Processed light diffusing polarizer. <Comparative Example 1> The above-mentioned laminated body obtained by laminating the light-diffusing film Α and the anti-glare film via the adhesive layer is used, and the surface of the light-diffusing layer of the light-diffusion film A is pressed by the rubber roller. A light-diffusing polarizing plate subjected to an anti-glare treatment was obtained in the same manner as in Example 1 except that the light-diffusing layer was subjected to an anti-glare treatment on the uneven surface of the metal embossing roll. <Comparative Example 2> 156990.doc -39-201219846 The light diffusing property of the antiglare treatment was obtained in the same manner as in Comparative Example 1, except that the light diffusing film B obtained in Production Example 4 was used instead of the light diffusing film A. Polarizer. <Comparative Example 3 > In addition to the above-described laminated body obtained by laminating the light-diffusing film A and the anti-reflection film via the adhesive layer, light diffusion by the light-diffusion film A was used according to the method described in the above Production Example 2 A light-diffusing polarizing plate subjected to anti-reflection treatment was obtained in the same manner as in Example 3 except that an antistatic layer and a low refractive index layer were sequentially formed on the surface of the layer and the light-diffusing layer was subjected to antireflection treatment. <Comparative Example 4> A light diffusing polarizing plate subjected to antireflection treatment was obtained in the same manner as in Comparative Example 3, except that the light diffusing film b obtained in Production Example 4 was used instead of the light diffusing film A. (Evaluation of Surface Treatment Characteristics of Light-Diffusing Polarizing Plate) (1) Evaluation of Anti-glare Property The light-diffusing polarizing plates of Examples 1 to 2 and Comparative Examples 1 and 2 subjected to anti-glare treatment were subjected to anti-glare properties. Evaluation. Specifically, the light-diffusing polarizing plate was visually observed from the side of the uneven surface (the surface of the anti-glare layer) in a bright room in which the fluorescent lamp was turned on, and it was confirmed whether or not the fluorescent lamp was reflected. The person who observed the fluorescent lamp on the entire film surface was set to A, and it was confirmed that at least a part of the film surface was set to B. The results are shown in Table 2. (2) Evaluation of color spots The light-diffusing 156990.doc -40·201219846 polarizing plates of Examples 3 to 4 and Comparative Examples 3 to 4 subjected to anti-reflection treatment were evaluated for color spots. Specifically, the surface of the protective film was black-dotted, and the light-diffusing polarizing plate colored in black by spraying was visually observed from the side of the low refractive index surface in the bright room in which the fluorescent lamp was lit, and it was confirmed that there was no Spot. The illuminator will not be observed on the entire film surface and will be set to A. At least part of the enamel surface will be confirmed. The results are shown in Table 2'. The color plaque is caused by the unevenness in the surface of the anti-reflection treatment surface and is visible in the above-mentioned visual observation. The phenomenon of iridescence can be seen in the surface of the anti-reflection treatment. Dysfunction. [Table 2]

As shown in Table 2, the light diffusing polarizing plate according to the present invention has been found to provide excellent surface treatment characteristics even for a light (four) film which is difficult to directly apply surface treatment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing a preferred example of a light-transmitting polarizing plate of the present invention. Fig. 2 is a schematic cross-sectional view showing another preferred example of the light-emitting nine-polarized polarizing plate of the present invention. 156990.doc -41-201219846 Fig. 3 is a schematic view showing an example of an apparatus for manufacturing a light-diffusing film. Fig. 4 is a schematic cross-sectional view showing a preferred example of the liquid crystal display device of the present invention. Fig. 5 is a schematic cross-sectional view showing an example of a light diffusing mechanism. Fig. 6 is a schematic cross-sectional view showing another example of the light diffusing means. Fig. 7 is a schematic perspective view for explaining the relationship between the ridgeline direction of the linear ridges of the two light deflecting plates (the cymbal) and the transmission axis direction of the polarizing plate. Fig. 8 is a view showing the measurement and the light diffusing mechanism. The vertical line of the light incident surface of the liquid crystal cell is 70. A method of the method of brightness value in the direction. Figure 9 is a diagram illustrating the definition of non-parallel light. Fig. 10 is a schematic cross-sectional view showing another preferred example of the liquid crystal display device of the present invention. [Description of main components] 100 light diffusing polarizing plate 101 polarizing film 102 light diffusing film 103 surface treating film 104 adhesive layer or adhesive layer 105 transparent base film 106 light diffusing layer 106a light transmitting resin 106b light transmitting fine particles 107 transparent resin film 156990.doc -42- 201219846 108 109 200 301 302 303 304 305 306 308 308 309 400 400' 401 402 403 403a 403b 403b 丨404 405 406 411a surface treatment layer protective film light diffusing polarizing plate unwinding device Coating device supporting light dryer mirror metal roll or embossing metal roll clamp stripping roller UV irradiation device winding device liquid crystal display device liquid crystal display device liquid crystal early backlight device light diffusing mechanism light diffusing plate light deflecting plate light Bias plate backlight side polarizing plate light diffusing polarizing plate phase difference plate transparent substrate 156990.doc • 43· 201219846 411b transparent substrate 412 liquid crystal layer 421 box 422 cold cathode tube 430 substrate 440 light diffusing agent 450 linear 稜鏡 450, Linear 稜鏡451 线线线线线451' Linear ridgeline 156990.doc - 44 -

Claims (1)

201219846 VII. Patent application scope: 1. A light diffusing polarizing plate comprising: a polarizing film; a light diffusing film laminated on the polarizing film; and a surface treating film laminated on the light diffusing film; The diffusing film has a light-diffusing layer, and the light-diffusing layer contains a light-transmitting resin and a light-transmitting fine particle. The light-transmitting fine particles are dispersed in the light-transmitting resin and are 20 parts by weight based on 100 parts by weight of the light-transmitting resin. The surface treatment film is formed of a transparent resin film that has been optically treated on one surface; the light diffusion layer and the surface treatment film are attached to each other via an adhesive layer or an adhesive layer. Hehe. 2. The light diffusing polarizing plate of claim 1, wherein the surface treatment film has a surface that is not subjected to optical treatment; and the surface of the light diffusion layer and the surface treatment film that is not subjected to optical treatment passes through an adhesive layer or an adhesive layer The light diffusion layer is bonded to the surface treatment film. 3. The light diffusing polarizing plate of claim 1 or 2, wherein the optical processing is an anti-glare treatment or an anti-reflection treatment. 4. The light diffusing polarizing plate according to any one of claims 1 to 3, wherein the light diffusing film package 3 is transparent substrate 胄, and the light diffusing layer laminated on the transparent substrate film 156990. Doc 201219846 5. 6. 7. 8. 9. 10. The light diffusing polarizing plate of claim 4, wherein the light diffusing layer is coated on the transparent substrate film with a resin liquid in which the light transmitting fine particles are dispersed. form. The light diffusing polarizing plate of claim 4, wherein the light diffusing layer coats a resin liquid in which the light transmitting fine particles are dispersed on the transparent base film, and is on a surface of a layer formed of the resin liquid The mirror surface or the uneven surface of the transfer mold is formed. A liquid crystal display device, which includes a backlight device, a light diffusing mechanism, a backlight-side polarizing plate, a liquid crystal cell, and a light diffusing polarizing plate according to any one of claims 1 to 6, wherein the light diffusing polarizing plate is as described above The polarizing film is disposed closer to the liquid crystal cell than the surface treatment film. The liquid crystal display device of claim 7, wherein the emitted light from the light diffusing means has a brightness which is inclined by 7 〇 from a direction perpendicular to a light incident surface of the liquid crystal cell with respect to a luminance of the perpendicular direction of 2%. The following light distribution characteristics include non-parallel light. The liquid crystal display device according to claim 7 or 8, wherein the light diffusing means includes the light diffusing plate and the light deflecting plate in this order from the side of the a light device. The liquid crystal display device according to any one of claims 7 to 9, wherein the liquid crystal unit is a TN type liquid crystal unit 'Ips type liquid crystal unit or ¥8 type liquid crystal unit 0 156990.doc