JP2010026529A - Wide view angle polarization film for liquid crystal display, and wide view angle polarization tacky adhesive film for liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wide view angle polarization film for liquid crystal display combined with a phase difference film and a luminance improvement film and having a reduced luminance unevenness. <P>SOLUTION: The wide view angle polarization film for liquid crystal display is formed by laminating a polarization layer on an optical compensation film, and further laminating the phase difference film and/or the luminance improvement film thereon. The polarization layer is directly laminated on the optical compensation film. The polarization layer is produced by a lyotropic solution containing a dichromatic dye or a liquid polymer solution containing dichromatic dye. In addition, the thickness of the polarization layer is 0.1 to 3 μm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wide viewing angle polarizing film for liquid crystal display and a wide viewing angle polarizing adhesive film for liquid crystal display. Furthermore, the present invention relates to a liquid crystal display device in which the wide viewing angle polarizing adhesive film for liquid crystal display is attached to at least one side of a liquid crystal panel.

  In a liquid crystal panel in a liquid crystal display, it is indispensable to dispose a polarizing element on a glass substrate that forms the outermost surface of the liquid crystal panel because of its image forming method. It is worn. As such a polarizing film, generally, a uniaxially stretched polyvinyl alcohol film adsorbed with iodine or a dichroic dye is used as a polarizer, and the polarizer is transparent like cellulose triacetate. The thing of the three-layer structure which protected both surfaces with the film is used. However, since these polarizing films generally have poor heat resistance, their use under conditions of 80 ° C. or higher has been limited.

  In addition to the polarizing film, various optical elements have been used on the outermost surface of the liquid crystal panel in order to improve the display quality of the display. For example, an optical compensation polarizing film in which an optical compensation film is laminated on a polarizing film is used in order to achieve a wide viewing angle with good visual recognition and to form a liquid crystal display device with little in-plane luminance unevenness. The optical compensation film is, for example, a liquid crystal layer formed by applying a liquid crystalline material to a support film such as a cellulose triacetate film. The liquid crystal layer is a discotic liquid crystal that is tilted and aligned, or a nematic liquid crystal. It is formed by what was inclined. Such an optical compensation polarizing film has been produced by laminating an optical compensation film and a polarizing film via an adhesive. Furthermore, on the polarizing film of the optical compensation polarizing film, a film in which a retardation film, a brightness enhancement film or the like is laminated is used in order to improve good visibility and the like. Lamination of the retardation film and the brightness enhancement film has also been performed via an adhesive.

  However, since the polarizing film has poor heat resistance and the thickness thereof is usually 100 μm or more, when laminating the polarizing film and the optical compensation film through an adhesive, the polarizing film has a window due to stress (strain) generated during heat shrinkage. Frame-like unevenness is likely to occur. In particular, when the number of layers is increased by further laminating a retardation film, a brightness enhancement film, or the like on the polarizing layer, there is a problem that unevenness in brightness increases.

The present invention provides a wide viewing angle polarizing film for liquid crystal displays combined with a retardation film and a brightness enhancement film, which has little luminance unevenness, and also provides a wide viewing angle polarizing adhesive film for liquid crystal displays. In addition, another object of the present invention is to provide a liquid crystal display device in which the wide viewing angle polarizing adhesive film is attached to at least one side of a liquid crystal panel.

Means for solving the problem

  The inventors of the present invention have intensively studied to solve the above-mentioned problems. As a result, they have found that the above object can be achieved by a wide viewing angle polarizing film shown below, and have completed the present invention.

  That is, the present invention provides a wide viewing angle polarizing film in which a polarizing layer is laminated on an optical compensation film, and a retardation film and / or a brightness enhancement film is further laminated on the polarizing layer. The polarizing layer is directly laminated on a compensation film, and the polarizing layer is made of a lyotropic solution containing a dichroic dye or a liquid crystal polymer solution containing a dichroic dye, and the thickness of the polarizing layer Is a wide viewing angle polarizing film for liquid crystal display, characterized by being 0.1 to 3 μm.

  In the wide viewing angle polarizing film for liquid crystal display according to the present invention, the polarizing layer is formed directly without using an adhesive for laminating the polarizing layer on the optical compensation film. (Film) can be relieved of stress, and even when a retardation film or a brightness enhancement film is further combined on the polarizing layer, window frame unevenness hardly occurs and brightness unevenness is small.

  In the wide viewing angle polarizing film for liquid crystal display, the optical compensation film preferably has a support film and an optically anisotropic layer made of a material exhibiting liquid crystallinity.

  Such an optical compensation film is effective for achieving a wide viewing angle with good visual recognition and forming a liquid crystal display device with little in-plane luminance unevenness, and the support film is also preferable for forming a polarizing layer.

  In the wide viewing angle polarizing film for liquid crystal display, it is a preferable aspect that the polarizing layer is made of a lyotropic solution containing a dichroic dye. In the wide viewing angle polarizing film for liquid crystal display, it is a preferable aspect that the polarizing layer is made of a liquid crystal polymer solution containing a dichroic dye.

  The polarizing layer of the present invention can be formed by coating these polarizing layer forming materials, and the polarizing layer can form a thin polarizing layer with good heat resistance. Moreover, the wide viewing angle polarizing film for liquid crystal display of the present invention having the polarizing layer is excellent in view of good visibility and wide viewing angle, and in terms of moisture resistance, durability and light weight.

  In the case where a lyotropic solution containing a dichroic dye is used as the polarizing layer forming material, the polarizing layer is formed by directly laminating the polarizing layer without providing an alignment film on the optical compensation film (particularly the support film). And a polarizing layer with good heat resistance can be formed efficiently.

  In the wide viewing angle polarizing film for liquid crystal display, the polarizing layer preferably has a thickness of 0.1 to 15 μm. In particular, the thickness of the polarizing layer is preferably 0.2 to 3 μm from the viewpoint of polarization characteristics and durability.

  The wide viewing angle polarizing film for liquid crystal display preferably has a protective layer on the surface of the polarizing layer. Depending on the specifications of the liquid crystal display device, a hard surface can be formed on the polarizing layer to prevent generation of scratches that hinder visual recognition.

  Furthermore, the present invention provides a liquid crystal characterized by laminating a polarizing layer by coating a polarizing layer forming material on an optical compensation film, and then laminating a retardation film and / or a brightness enhancement film on the polarizing layer. The present invention relates to a method for producing a wide viewing angle polarizing film for display.

  By this method, a thin polarizing film having a light weight and good heat resistance can be efficiently formed, and a wide viewing angle polarizing film for liquid crystal display can be obtained by laminating a retardation film and a brightness enhancement film thereon. Can be manufactured.

  Furthermore, the present invention relates to a wide viewing angle polarizing adhesive film for liquid crystal display, characterized in that an adhesive layer is provided on the glass substrate attaching surface of the liquid crystal panel of the wide viewing angle polarizing film for liquid crystal display. Furthermore, the present invention relates to a liquid crystal display device, wherein the wide viewing angle polarizing adhesive film for liquid crystal display is attached to at least one side of a liquid crystal panel.

  The liquid crystal display device to which the wide viewing angle polarizing adhesive film is attached has a wide viewing angle with good visual recognition and little luminance unevenness.

  For example, as shown in FIG. 1, one embodiment of the wide viewing angle polarizing adhesive film of the present invention has a polarizing layer 1 laminated on an optical compensation film 2 without an adhesive layer, and further has a luminance on the polarizing layer 1. The improvement film (and / or retardation film) 3 is laminated. The protective layer 4 can be provided on the polarizing layer 1. In addition, lamination | stacking of the brightness improvement film 3 to the polarizing layer 1 is normally performed through the adhesive 5a. On the other hand, the adhesive layer 5b is provided in the optical compensation film 2 used as the glass substrate sticking surface of the liquid crystal panel of a wide viewing angle polarizing adhesive film. Moreover, the release sheet 6 can be provided in the said adhesion layer 5b.

  Examples of the optical compensation film 2 include a birefringent film formed by uniaxially or biaxially stretching a polymer film, and a liquid crystal alignment having an optically anisotropic layer made of a liquid crystalline material exhibiting birefringence on a support film. Examples include films. The thickness of the optical compensation film 2 is not particularly limited but is generally about 5 to 100 μm. Among these optical compensation films 2, a liquid crystal alignment film having an optically anisotropic layer 2a on a support film 2b is preferable. In FIG. 1, the polarizing layer 1 is laminated on the support film 2b side of the liquid crystal alignment film (optical compensation film 2). However, the polarizing layer 1 is laminated on the liquid crystal alignment film on the optical anisotropic layer 2a side. You can also

  Examples of the polymer material to be the birefringent film include polyvinyl alcohol, polyvinyl butyral, polymethyl vinyl ether, polyhydroxyethyl acrylate, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, polycarbonate, polyarylate, polysulfone, polyethylene terephthalate, and polyethylene. Naphthalate, polyethersulfone, polyphenylene sulfide, polyphenylene oxide, polyallylsulfone, polymethyl methacrylate, polyamide, polyimide, polyolefin, polyvinyl chloride, cellulose polymer, norbornene resin, or binary or ternary system thereof Examples include various copolymers, graft copolymers, and blends. These polymer materials become oriented products (stretched films) by stretching or the like. Specific examples include trade names NRF and NRZ manufactured by Nitto Denko Corporation.

  On the other hand, the support film is formed of a transparent polymer, and an appropriate transparent material can be used. However, a film excellent in transparency, mechanical strength, thermal stability, moisture barrier property, and the like is preferably used. The thickness of the support film is not particularly limited but is generally about 5 to 50 μm. Examples of the transparent polymer forming the support film include polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulose polymers such as cellulose diacetate and cellulose triacetate, acrylic polymers such as polymethyl methacrylate, polystyrene, acrylonitrile, Examples thereof include styrene polymers such as styrene copolymers (AS resins), polycarbonate polymers, and the like. In addition, polyethylene, polypropylene, polyolefins having a cyclo or norbornene structure, polyolefin polymers such as ethylene / propylene copolymers, vinyl chloride polymers, amide polymers such as nylon and aromatic polyamide, imide polymers, sulfone polymers , Polyether sulfone polymer, polyether ether ketone polymer, polyphenylene sulfide polymer, vinyl alcohol polymer, vinylidene chloride polymer, vinyl butyral polymer, arylate polymer, polyoxymethylene polymer, epoxy polymer, or the above Polymer blends and the like are also examples of the polymer that forms the transparent protective layer. Among these, cellulose triacetate is preferable.

  As the liquid crystalline material to be an optically anisotropic layer, a main chain type or a side chain type in which a conjugated linear atomic group (mesogen) imparting liquid crystal alignment is introduced into a main chain or a side chain of a polymer. There are various things. Examples thereof include discotic liquid crystal polymers and nematic liquid crystal polymers. The formation of the optically anisotropic layer with these liquid crystalline polymers can be achieved, for example, by subjecting the surface of a thin film of polyimide, polyvinyl alcohol or the like to a rubbing treatment or an oblique deposition of silicon oxide. The solution is developed and heat-treated. The thickness of the optically anisotropic layer is preferably about 0.1 to 10 μm.

  As the optical compensation film, a liquid crystal alignment film in which a liquid crystal polymer is aligned on a support film made of a cellulose triacetate film is particularly preferable. Examples of such a liquid crystal alignment film include trade name WVAO2A manufactured by Fuji Photo Film Co., Ltd.

  As the material for forming the polarizing layer 1, a lyotropic liquid crystal solution containing a dichroic dye, a liquid crystalline polymer solution containing a dichroic dye, or the like is preferably used. The lyotropic liquid crystal and the liquid crystalline polymer are not particularly limited, and various types can be used. The dichroic dye exhibits different absorbances with respect to incident light on the major axis and minor axis of the molecule, and the major axis of the molecule is aligned in the predetermined direction according to the uniaxial orientation of a liquid crystal polymer or the like. Thus, the vibration component contained in the incident light is selectively absorbed and transmitted to be converted into polarized light. As the dichroic dye, for example, a composition prepared so as to have dichroism over the entire visible wavelength range of incident light can be used, and a disazo dichroic dye having a thienothiazole ring, benzothiazole Examples thereof include a trisazo dichroic dye having a ring and a specific azo dichroic dye. The dichroic dye may have dichroism only for a specific color and convert incident light of the specific color into polarized light. It is preferable to use about 1 to 20% by weight of the dichroic dye in the solution.

  In forming the polarizing layer 1, a solution is prepared by dissolving the dichroic dye and lyotropic liquid crystal or liquid crystalline polymer in a solvent. For example, the lyotropic liquid crystal is used as an aqueous solution, and the liquid crystalline polymer is used as a solution dissolved in an organic solvent.

  Next, the polarizing layer forming material (solution) is coated on the optical compensation film 2 by an appropriate coating method such as a casting method or a spin coating method, and heated to form a thin film. The thin film is preferably about 0.1 to 15 μm. In addition, when the polarizing layer forming material is a lyotropic liquid crystal solution, it is not particularly necessary to perform the alignment treatment on the optical compensation film 2, and the polarizing layer can be directly formed on the optical compensation film 2, but as the polarizing layer forming material, When a liquid crystalline polymer solution is used, the optical compensation film 2 is previously subjected to an alignment treatment. Although the alignment treatment method is not particularly limited, for example, it is performed by forming a thin film such as polyimide or polyvinyl alcohol and rubbing the surface.

  The structure, composition, production method and the like of a suitable dichroic dye and liquid crystal polymer used in the polarizing layer 1 are disclosed in JP-T 8-511109, WO 97/39380, NITTO Technical Report Vo135, No. 1 1, p79 (1997), JP-A-11-101964, and the like.

  A protective layer 4 can be provided on the surface of the polarizing layer 1. The protective layer 4 is intended to prevent the generation of scratches that form a hard surface on the polarizing layer and hinder visual recognition. The hard material is not particularly limited as long as it does not inhibit the optical compensation function. For example, the protective layer 4 made of a transparent film can be provided. As a material for forming the transparent film, the same material as the support film used for the optical compensation film can be used. As the transparent film, cellulose triacetate is preferable. The protective layer 4 can be formed of a suitable cross-linked resin that forms a transparent hard film. For example, urethane acrylic type or epoxy type ultraviolet curable resin can be preferably used. When the protective layer 4 is laminated with a transparent film, it is usually performed through an adhesive (not shown). When the protective layer is formed with the crosslinked resin, the protective layer is laminated on the polarizing layer. No adhesive is required.

  An example of the brightness enhancement film is a film using circularly polarized light of a cholesteric liquid crystal. Specific examples include the product name PCF350 manufactured by Nitto Denko Corporation and the product name Transmax manufactured by Merck Co., Ltd. Moreover, as a thing using the linearly polarized light of reflection of a multilayer interface, 3M Co., Ltd. brand name D-BEF etc. are mention | raise | lifted.

  Examples of the retardation film include a birefringent film obtained by uniaxially or biaxially stretching a polymer material, a liquid crystal polymer film, and the like, and the same film as an optical compensation film can be used.

  The wide viewing angle polarizing film can be further appropriately laminated with an appropriate optical layer such as an antiglare sheet, a diffusion sheet, an antireflection film or a protective plate on the surface, in addition, a protective layer, a retardation film, and a luminance improvement. Films can be combined.

  Examples of the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layers 5a and 5b include various types such as rubber-based pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. Among these, acrylic pressure-sensitive adhesives are preferable and their bases The weight average molecular weight of the polymer is preferably about 300,000 to 2.5 million. In addition, the same adhesive can also be used for formation of adhesive layers other than the adhesive layers 5a and 5b.

  As a monomer used for the acrylic polymer which is the base polymer of the acrylic pressure-sensitive adhesive, various alkyl (meth) acrylates {(meth) acrylate refers to acrylate and / or methacrylate, and hereinafter the same as (meth) Meaning. } Can be used. Specific examples of such alkyl (meth) acrylates include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and the like alone or in combination. Can be used. Among these, a monomer unit of the base polymer using 30% by weight or more of butyl acrylate is preferable because the base polymer can be set to exhibit adhesiveness by adjusting the relaxation elastic modulus of the base polymer.

  In addition, it is preferable to use a small amount of (meth) acrylic acid instead of a part of the alkyl (meth) acrylate in order to impart polarity to the resulting acrylic polymer. Furthermore, glycidyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, N-methylol (meth) acrylamide and the like may be used in combination as a crosslinkable monomer. Furthermore, if desired, other copolymerizable monomers such as vinyl acetate and styrene may be used in combination as long as the adhesive properties of the acrylic polymer are not impaired.

  The acrylic polymer can be produced by various known methods. For example, a radical polymerization method such as a bulk polymerization method, a solution polymerization method, or a suspension polymerization method can be appropriately selected. As the radical polymerization initiator, various known azo and peroxide initiators can be used. Among the production methods, a solution polymerization method is preferable, and a polar solvent such as ethyl acetate or toluene is generally used as the solvent for the acrylic polymer.

  Examples of the base polymer of the rubber adhesive include natural rubber, isoprene rubber, styrene-butadiene rubber, recycled rubber, polyisobutylene rubber, styrene-isoprene-styrene rubber, and styrene-butadiene-styrene rubber. Etc. Examples of the base polymer of the silicone pressure-sensitive adhesive include dimethylpolysiloxane and diphenylpolysiloxane.

  Moreover, it is preferable that the said adhesive contains a crosslinking agent. Examples of the crosslinking agent include polyisocyanate compounds, polyamine compounds, melamine resins, urea resins, and epoxy resins. Furthermore, as needed, the pressure-sensitive adhesive suitably includes a tackifier, a plasticizer, a filler, an antioxidant, an ultraviolet absorber, a silane coupling agent and the like as long as they do not depart from the object of the present invention. You can also

  Formation of the adhesion layer 5b is performed on the glass substrate sticking surface of the liquid crystal panel of a wide viewing angle polarizing film. In FIG. 1, the surface opposite to the surface on which the polarizing layer 1 of the optical compensation film 2 is laminated is the glass substrate sticking surface. The formation method of the adhesive layer 5b is not particularly limited, and the adhesive layer 5b is widened by a method of applying and drying an adhesive (solution) on the glass substrate attaching surface of the wide viewing angle polarizing film, and the release sheet 6 provided with the adhesive layer 5b. Examples thereof include a method of transferring to a viewing angle polarizing film. The formation of the pressure-sensitive adhesive layer 5a and other pressure-sensitive adhesive layers can employ the same means as the formation of the pressure-sensitive adhesive layer 5b. The adhesive layers 5a and 5b (dry film thickness) are not particularly limited in thickness, but are preferably about 10 to 40 μm.

  Examples of the constituent material of the release sheet 6 include paper, synthetic resin films such as polyethylene, polypropylene, and polyethylene terephthalate. The surface of the release sheet 6 may be subjected to a silicone treatment, a long-chain alkyl treatment, or a fluorine treatment, if necessary, in order to improve the peelability from the pressure-sensitive adhesive layer 5.

  The liquid crystal display device can be formed according to a conventional method. The wide viewing angle polarizing adhesive film can be installed on one side or both sides of the liquid crystal panel. In addition, in the liquid crystal display device, a lighting system using a backlight or a reflector can be appropriately formed.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited thereto.

Production Example 1
A liquid crystal alignment film (WV film manufactured by Fuji Photo Film Co., Ltd.) using a cellulose triacetate film as a support film was used as the optical compensation film. Subsequently, after coating the optical compensation film on the support film side with a lyotropic liquid crystal aqueous solution (LC Polarizer; manufactured by Optiva Inc., solid content concentration: 8.7 wt%) containing a dichroic dye with a wire bar (No. 7). And dried at 80 ° C. to form a polarizing layer having a thickness of 1.3 μm to obtain an optical compensation film having the polarizing layer. When the thickness of this optical compensation polarizing film was measured, the thickness was 110 μm, the single transmittance was 40%, and the degree of polarization was 90%. The single transmittance and the degree of polarization are values measured with a spectrophotometer DOT-3 manufactured by Murakami Color Research Laboratory.

Production Example 2
A liquid crystal alignment film (WV film manufactured by Fuji Photo Film Co., Ltd.) using a cellulose triacetate film as a support film was used as the optical compensation film. A polyvinyl alcohol layer was provided on the support film side of the optical compensation film and further subjected to the rubbing treatment.

Separately, the following chemical formula 1,

26 parts by weight of a side chain type liquid crystal polymer represented by the following formula: 0.37 parts by weight of G-202 dye manufactured by Nippon Photosensitive Laboratories Co., Ltd. 0.73 parts by weight of G-207 dye manufactured by the company, G-429 dye manufactured by the company 46 parts by weight and 100 parts by weight of tetrachloroethane were mixed to prepare a uniform solution. The solution is coated on the rubbing treatment layer of the optical compensation film by spin coating, and then heat-treated at 100 ° C. to align the liquid crystal polymer to form a polarizing layer having a thickness of 1.5 μm. An optical compensation film having a layer was obtained.

Furthermore, on the polarizing layer,

After applying a urethane acrylic resin represented by the formula (1), UV curing was performed to form a protective layer made of a crosslinked resin having a thickness of 5 μm. When the thickness of this optical compensation polarizing film was measured, the thickness was 115 μm, the single transmittance was 38%, and the degree of polarization was 88%.

Examples 1 and 2
A wide viewing angle of the present invention is obtained by bonding a brightness enhancement film (manufactured by Nitto Denko Corporation, PCF350) to each of the optically compensated polarizing films prepared in Production Examples 1 and 2 via a 25 μm adhesive layer (acrylic adhesive). A polarizing film was obtained.

(Luminance unevenness)
As shown in FIG. 2, the optical compensation film side of the wide viewing angle polarizing film A obtained in the example is placed on one side of a glass plate (1.1 mm) C, and an adhesive layer (acrylic adhesive) 5b of 25 μm is provided. On the other hand, on the other side of the glass plate C, the optical compensation film side of the optical compensation polarizing film B obtained in the production example is crossed Nicol through a 25 μm adhesive layer (acrylic adhesive). Each was pasted together.

  After storing this at 80 ° C. for 24 hours, the transmittance of 9 points in the plane (length 230 mm × width 310 mm) shown in FIG. 3 was measured (luminance meter BM-5, manufactured by Topcon), and the transmittance (%) The difference between the maximum and minimum values of was determined. The results are shown in Table 1.

Comparative Example 1
A polarizing plate (manufactured by Nitto Denko Corporation, thickness 215 μm) is prepared, and an optical compensation film (WV film manufactured by Fuji Photo Film Co., Ltd.) and a brightness enhancement film (Nitto Denko Corporation, PCF 350) are adhered to both sides of the polarizing plate at 25 μm. Each was laminated with a layer (acrylic adhesive) to obtain a wide viewing angle polarizing film. The brightness unevenness was determined using the obtained wide viewing angle polarizing film. The results are shown in Table 1. In addition, as the optical compensation polarizing film B, a film in which the optical compensation film was attached to one side of the polarizing plate was used.

It is sectional drawing of the wide viewing angle polarizing adhesive film of this invention. It is a conceptual diagram of the sample which measured the brightness nonuniformity. This is a sample transmittance measurement point for measuring luminance unevenness.

DESCRIPTION OF SYMBOLS 1 Polarizing layer 2 Optical compensation film 3 Brightness enhancement film and / or retardation film 4 Protective layer 5 Adhesive layer A Wide viewing angle polarizing film B Optical compensation polarizing film

Claims (6)

In a wide viewing angle polarizing film in which a polarizing layer is laminated on an optical compensation film, and a retardation film and / or a brightness enhancement film are further laminated on the polarizing layer,
The polarizing layer is directly laminated on the optical compensation film;
The polarizing layer is made of a lyotropic solution containing a dichroic dye or a liquid crystal polymer solution containing a dichroic dye, and
A wide viewing angle polarizing film for liquid crystal display, wherein the polarizing layer has a thickness of 0.1 to 3 μm.   2. The wide viewing angle polarizing film for liquid crystal display according to claim 1, wherein the optical compensation film has a support film and an optically anisotropic layer made of a material exhibiting liquid crystallinity.   3. The wide viewing angle polarizing film for liquid crystal display according to claim 1, further comprising a protective layer on the surface of the polarizing layer.   The retardation film and / or the brightness enhancement film are laminated on the polarizing layer after the polarizing layer is laminated on the optical compensation film by coating the polarizing layer forming material. A method for producing a wide viewing angle polarizing film for liquid crystal display.   4. A wide viewing angle polarizing adhesive film for liquid crystal display, wherein an adhesive layer is provided on the glass substrate attachment surface of the liquid crystal panel of the wide viewing angle polarizing film for liquid crystal display according to claim 1. . 6. A liquid crystal display device, wherein the wide viewing angle polarizing adhesive film for liquid crystal display according to claim 5 is attached to at least one side of a liquid crystal panel.