TW200937053A - Polarizer and method for making the same - Google Patents

Abstract

This invention provides a polarizer having a pair of transparent substrates corresponding to and disposed apart from each other, wherein at least one piece of polarizing element is provided in between a first transparent substrate positioned at the outermost place of one side of the polarizer, and a second transparent substrate positioned at the outermost place of another side of the polarizer. A first adhesive agent layer is provided on the side of the polarizing element and a second adhesive agent layer is provided on another side of the polarizing element: the first adhesive agent layer and the second adhesive agent layer having different glass transition temperatures.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polarizing plate (polarizing plate 'or polarizer') for a projection type liquid crystal display device such as a front projector or a rear projector. And its manufacturing method. [Prior Art] In order to cope with a large screen, a conventional Brohn tube 投射i.4 display device liquid crystal display device has been rapidly popularized for business use and use in the court. Here, the projection type means that after the light emitted from the light source is separated into the three primary colors of KGB, the respective color lights are passed through the liquid crystal panel, the polarizing plate, or the like in the respective optical paths, and finally expanded by the projection lens to form an image on the screen == image. the way. For the projection type liquid crystal display device, the front projector that projects the image onto the screen when viewed by the viewer is mainly used for the work, and the rear projector that projects the image on the inside is mainly used for the home exhibition. The crystal display has been used in recent years to increase the brightness of the screen. Therefore, a high-pressure mercury lamp that emits strong light to L is required as a light (4) polarizer for this configuration: even if it is long-term storage under long-term wetness, it is _light-resistant, and the combination of the two is abbreviated as No: Mr. ^^^ Lightness = Decision projection liquid crystal display device life: = film - Solution: As shown in Fig. 1 of Kaiping 10-39138, the glass with high thermal conductivity is transparent 320867 3 <4 200937053 The substrates 1 and 2 are mounted on the polarizer (polarizer) 3 by the same adhesive layer 4, and the heat generated by the polarization β 3 is transmitted to the transparent substrate 2, from the 四 · (4) part (4) (4) C, for example, refer to [Example Bu (10) (8) to (10) Can. SUMMARY OF THE INVENTION Nowadays, it is required to increase the light intensity of a light source in a projection type liquid crystal display device. In such a case, the light resistance and heat resistance of the polarizing plate are required to be further improved. Therefore, an object of the present invention is to provide a polarizing plate which is excellent in both optical properties and heat resistance and which is capable of miniaturizing an optical system of a projector, a rear projector #, and a projection type liquid crystal device, and an optical member having the polarizing plate, Projection type liquid crystal display | and a method of manufacturing a polarizing plate. The present invention provides a polarizing plate which is at least two transparent substrates which are relatively isolated, and at least one polarization is provided between the ith transparent substrate located at the outermost side of the square and the second transparent substrate located at the outermost side of the other side. Wherein 'the i-th adhesive layer is provided on the side of the polarizer, and the second adhesive layer is provided on the other side, and the glass transition/JDL degree of the i-th adhesive layer and the second adhesive layer are different. . Such a polarizing plate is excellent in light resistance and heat resistance, and it is also possible to miniaturize a projection type liquid crystal device such as a front projector or a rear projector. In the polarizing plate, when one of the first adhesive layer and the second adhesive layer is formed of an elastic adhesive or an adhesive, and the other adhesive layer is formed of a curable adhesive, Further improve heat resistance. For the polarizing plate of the present invention, a polarizer is provided between the first transparent substrate and the second transparent substrate, and the polarizer is bonded to the first transparent substrate via the second adhesive layer 320867 4 200937053 - poor. #夜 Left is preferably joined to the second transparent substrate by the second adhesive layer. In the polarizing plate of the present invention, a second adhesive layer may be formed on the inner surface of the upper transparent substrate and the second transparent substrate, and the first (four) layer 'on each of the above-mentioned permeable boards may be mounted. Two polarizers different from each other. In the polarizing plate, a second adhesive layer is bonded to a surface of the polarizer attached to the first transparent substrate on a side opposite to a surface of the polarizer that is in contact with the ith adhesive layer, and is attached to the second transparent substrate. The surface of the upper polarizer on the opposite side to the surface in contact with the first adhesive layer is preferred. A protective layer is formed on each of the surfaces of the polarizer attached to the first transparent substrate and the second transparent substrate opposite to the surface in contact with the first adhesive layer, and a second adhesive layer is used between the protective layers. Bonding is appropriate. In the polarizing plate, a protective layer is formed between the protective layers, respectively, on the side faces of the polarizer attached to the first transparent substrate and the second transparent substrate on the opposite side of the surface in contact with the first adhesive layer. It is preferable to join the second transparent substrate with the second adhesive layer interposed therebetween. In the polarizing plate of the present invention, in the light having a center wavelength of 44 Οηπι, 5 5 Οηπι or 610 nm, absorption of one of the polarizers attached to the first substrate and the second transparent substrate The transmittance in the axial direction is 10% to 70%, and the transmittance in the absorption axis direction of the other polarizer is preferably 1% or less. When the transmittance of the polarizer is within the above range, deterioration of the polarizing plate can be suppressed. When the water content of the polarizer is 5% by weight or less, the transparency of the polarizing plate can be greatly improved by 320867 200937053. In the polarizing plate of the present invention, if the polarizer adsorbs a polarizer having a dichroic dye or iodine on a polarizer substrate of a polyvinyl alcohol resin, or the polarizer is embedded in a polyvinyl alcohol/polyethylene base When the film formed by the segment copolymer is used, the light resistance can be further improved. From the viewpoint of improving the light resistance of the polarizing plate, at least one of the first transparent substrate and the second transparent substrate preferably has a thermal conductivity of 5 W/(m·K) or more. The material of one of the first transparent substrate and the second transparent substrate is at least one selected from the group consisting of crystal, sapphire, magnesia, and spinel, from the viewpoint of further improving the light resistance of the polarizing plate. The material of one of the materials is preferably at least one selected from the group consisting of magnesium oxide, spinel, quartz glass, silicate glass, borosilicate glass, and crystal. When at least one of the first transparent substrate and the second transparent substrate is a single crystal transparent substrate, the light resistance of the polarizing plate is further improved. The present invention also provides an optical member obtained by joining the polarizing plate of the present invention and a retardation film described above. The present invention also provides a method for producing the above polarizing plate, which comprises the step of forming a first adhesive layer and/or a second adhesive layer under reduced pressure. In the above method for producing a polarizing plate, it is preferred to further dry the polarizer attached to the transparent substrate at a temperature of 130 ° C or lower. Thereby, the moisture content of the polarizer can be appropriately adjusted. The present invention also provides a projection type liquid crystal display device having the above polarizing plate and a liquid crystal display panel. Since such a projection type liquid crystal display device has the polarizing plate of the present invention, it can sufficiently reduce the size of the optical system. In the projection type liquid crystal display device, at least one of the first transparent substrate and the second transparent substrate is a single crystal transparent substrate, and the single crystal transparent substrate is preferably provided with the polarizing plate so as to be on the liquid crystal display panel side. . The polarizing plate of the present invention is excellent in initial fiscal properties, long-term light resistance, and rich heat. [Embodiment] (Best Mode for Carrying Out the Invention) Hereinafter, a polarizing plate of the present invention and a projection type liquid crystal display device using the same will be described in detail with reference to the accompanying drawings. The invention is not limited to these embodiments. In the drawings, the same elements are denoted by the same reference numerals, and the repeated description is omitted. Further, the positional relationship of the up, down, left, and right directions is based on the positional relationship shown in the drawings unless otherwise specified. Further, the dimensional ratio of the drawings is not limited to the ratio shown in the drawings. Fig. 1 is a schematic view showing an embodiment of the polarizing plate of the present invention. In the polarizing plate 1 of the first embodiment, the transparent substrate (first transparent substrate) 1 is bonded to one surface of the polarizer 3 via the adhesive layer (first adhesive layer) 4, and the other surface of the polarizer 3 is passed through The agent layer (second adhesive layer) 5 bonds the transparent substrate (second transparent substrate) 2. The glass transition temperature of the adhesive layer 4 and the adhesive layer 5 is different. Even if stress deformation occurs inside the polarizing plate due to heat generated when strong light is transmitted, the adhesive layer 4 and the adhesive layer 5 which are formed on both surfaces of the polarizer 3 and have different glass transition temperatures can absorb 7 320867. 200937053 Suspension = stress deformation, which can effectively suppress the adhesion of the polarizer 3, such as the peeling of the polarizer 3, to form an adhesive for the adhesive layer 4, 5, to exhibit an adhesive adhesive (adhesive of π). Furthermore, the adhesive layer of the present invention is generally transparent. The glass transition temperature of the layer 4, w, and 5 may be different, and the specific = dish is not particularly limited. However, the difference in glass transition temperature of the adhesive layer is 60 C or more. Recommended for Cao C: Make the glass of one of the adhesive layers shift ~ 怠, 1 () c, more preferably -7 (TC to -3 (the range of TC, so that the remaining glass of the inflammatory layer is transferred) The temperature is from 50 ° C to 20 (TC, more preferably from 80 ° C to λ λ · _ measured value - where 'glass transition temperature is based on the subsequent transfer temperature from _8 generation to - order of the adhesive layer For example, the specific example of "elastic bonding" when 5 is "adhesive A"), for example, (for example, propionic acid rubber, acrylic rubber) and adhesive 〇 〇 移 移 移 移 _ Specific examples of the adhesive layer such as "epoxypoxide" (hereinafter referred to as "adhesive B") include an epoxy resin 582 adhesive (for example, thermosetting κ_5 制 manufactured by Cemedine Co., Ltd.) UV-curable epoxy resin adhesive made by the company, heat-resistant gelatin, etc. For example, the ultraviolet curable type of the hydroxyl group terminal has a UV-curable ':::), cyanoacrylate vinegar, and an acrylic resin. As a material of the transparent substrate 2 used in the present invention, for example, 320867 8 200937053, such as an inorganic transparent material, may be mentioned. For example, it can be exemplified as: silicate powder glass, sulphate glass, titanium silicate glass, fused silica (quartz glass), crystal, sapphire, YAG crystal, fluorite, magnesia, spinel (Mg 〇·Al2〇3) where 'the thermal conductivity is 5 W/mK or more from the viewpoint of efficiently releasing the heat generated by the polarizer 3 to the outside and lowering the polarizer 3 to improve the light resistance of the polarizing plate. The material is preferably crystal, sapphire, magnesia or spinel, and at least one of the transparent substrates θ 1 and 2 is preferably a single crystal. Further, sapphire, YAG crystal, and sapphire are particularly preferably crystal or sapphire. Further, at least one of the transparent substrates 1 and 2 preferably has a front phase difference of less than 5 nm in a wavelength range of 380 nm to 780 nm. When the front surface difference of the transparent substrate is less than 5 nm, the surface of the polarized light generated by the light source passing through the polarizer passes through the transparent substrate without being skewed, so that the contrast of the screen projected from the projector becomes good. As such a transparent substrate For example, bismuth silicate glass, borosilicate glass, cinnamate glass, fused silica (quartz glass), magnesium oxide, and spinel. As a specific combination, in the transparent substrates 1, 2 One side is oxidized town, sapphire, spinel, crystal of heat conduction south. The other side is magnesium oxide, spinel, strontium silicate, borax acid glass, titanium citrate with low positive phase difference. Glass, fused silica (quartz glass) is preferred. In addition, from the viewpoint of low control price, 'the crystal, the bismuth silicate glass, the borosilicate glass, the titanium silicate glass, the fused silica (quartz glass) are also used for one of the transparent substrates 1 and 2 Effective. The "frontal phase difference" means that the direction in which the refractive index of the transparent substrate is 9 320867 200937053 is the x-axis, and the direction perpendicular to the x-axis is the γ-axis, and the thickness direction of the transparent substrate is taken as the x-axis. The refractive index in each axial direction is nxl, Hyl, Πζΐ, and when the film thickness is di (nm), the value of _ is calculated by (nxl_nyl)xdi. The thickness of the transparent substrates 1 and 2 is preferably from 5 mm to 3 mm, more preferably from 2 mm to 3 mm, from the viewpoint of the yield at the time of industrialization and the size of the applicable projector optical system. When the thickness of the transparent substrate is 〇. 5% or more, the damage of the transparent substrate during processing is suppressed, and it can be stably produced. Further, when the thickness of the transparent substrate is 3 mm or less, the obtained polarizing plate of ruthenium can be reduced in size and weight. For the outer surfaces of the transparent substrates 1 and 2 which are in contact with the air, it is desirable to carry out an anti-reflection treatment corresponding to the wavelength of the light used. As the antireflection treatment, a method of forming a dielectric multilayer film by a sputtering method or a vacuum deposition method and applying one or more low refractive index layers by coating can be mentioned. Further, it is also possible to carry out an antifouling treatment for preventing the surface from adhering to the antireflection surface. As the antifouling treatment, for example, a fluorine-containing hafnium layer having almost no influence on the antireflection property can be formed on the surface. ϋ As the polarizer 3 used in the present invention, for example, a polarization of a polyethylene-based resin, a polyvinyl acetate resin, an ethylene/vinyl acetate (EVA) resin, a polyamide resin, or a polyester resin may be mentioned. a material in which a dichroic dye or iodine is adsorbed in a substrate, and a molecularly oriented polyvinyl alcohol film contains a polyvinyl alcohol/polyethylene intercalation of a molecular chain of a disaccharide dehydration product (polyethylene) of polyvinyl alcohol. Segment copolymer. As the polarizer, a polarizer having a dichroic dye or iodine adsorbed and adsorbed in a polyvinyl alcohol-based resin is particularly preferable. 320867 10 200937053 'The polyvinyl alcohol-based resin used in the substrate of the polarizer includes: polyvinyl alcohol which is a partial or complete saponification of polyvinyl acetate; vinyl acetate such as saponified EVA resin and the like a saponified product of a copolymer of a copolymerized monomer (for example, an olefin of ethylene or propylene, a crotonic acid or an unsaturated carboxylic acid of acrylic acid, maleic acid, an unsaturated sulfonic acid, or a vinyl ether); Polyvinyl formal or polyvinyl acetal obtained by modifying aldehyde with polyvinyl alcohol. As the substrate of the polarizer, from the viewpoint of the adsorptivity and the alignment property of the dye, it is preferred to use a polyvinyl alcohol-based resin @ film, particularly a film made of polyvinyl alcohol. The polarizer formed of a polyvinyl alcohol/polyethylene block copolymer is obtained by exposing a polyvinyl alcohol film molecularly aligned by stretching or the like to concentrated hydrochloric acid or concentrated sulfuric acid to form a polyethylene. Conjugated block of matter. The copolymer may also be used directly as a polarizer, but a substance impregnated with boric acid and/or borax is usually used as a polarizer. As the substance which adsorbs the alignment in the substrate of the polarizer, for example, a dichroic dye is preferred. Various polarizers for blue channel use, green light path use, and red light path use of various projection type liquid crystal display devices are produced by using dyes having different wavelength dependence. The dichromatic dyes include those described in "Development of dichroic dyes for liquid crystal display devices" (Baigen et al., Sumitomo Chemical, 2002-11, pages 23 to 30). Specific examples of the dichroic dye include compounds represented by the following formula (I) in the form of a free acid. 11 320867 200937053 Α^Ν

Here, in the formula (I), Me represents a metal atom selected from the group consisting of a copper atom, a nickel atom, a zinc atom and an iron atom. Αι denotes a phenyl group which may be substituted or a naphthyl group which may be substituted. B1 represents a naphthyl group which may be substituted, and an oxygen atom bonded to Me and an azo bond represented by -N=N- are carbons located adjacent to each other on the benzene ring. R1 and R2 are each independently and represent an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a carboxyl group, a sulfo group, a sulfonamide, or the like. Sulfonyl amide, amino, arylamino, wall or halogen atom. Further, examples of the dichroic dye include compounds represented by the following formula (II) in the form of a free acid.

R4 0H

Wherein, in the formula (II), A3 and B3 are each independently, and represent a phenyl group which may also be substituted or a naphthyl group which may be substituted, and R3 and R4 are each independently, and represent a hydrogen atom and have 1 to 1 carbon atom. The alkyl group of 4, an alkoxy group having 1 to 4 carbon atoms, a carboxyl group, a sulfonic acid group, a sulfonylamino group, a sulfoalkylguanamine group, an amino group, a halogen atom or a schlossyl group, and m represents 0 or 1. Further, examples of the dichroic dye include a compound represented by the above formula (III) in the form of a free acid in the following 12 320867 200937053. Q1-n=n-q2-x-q3-n = n-q4 (ΠΙ) where 'in formula (III), Q and Q are each independently, indicating that the base may also be substituted or may be substituted Naphthyl, Q2 and Q3 are each independently represented by a phenyl extended group which may also be substituted. Further, X represents a divalent group represented by the following formula (III-1) or (III-2), respectively. —N = N~ —N == N-1 ο (H-l) (m-2) Further, as a dichroic dye, a compound represented by the formula (IV).

0~Me—0 N=N~Q′ may be exemplified as the lower (IV) in the form of a free acid. In the formula (IV), Me represents a group selected from a copper atom, a nickel atom, a zinc atom q, and an iron atom. The metal atoms in the group, Q5 and Q6 are each independently, and represent a naphthyl group which may have a substituent. The oxygen atom bonded to Me and the azo group represented by -NN- are bonded to each other on the benzene ring. Position on the carbon. R and R6 are each independently and represent a hydrogen atom, an alkyl group having from 1 to 4 carbon atoms, an alkoxy group having a carbon number of from 4 to 4 or a sulfonic acid group. γ represents a divalent group represented by the following formula (IV-1) or formula (iv-2), respectively. —N = N- (l?-i) -N = N~ (IV-2)

I Ο 13 320867 200937053 In addition, as a dichroic dye, it can be enumerated by CI Direct Yellow 12, CI Direct Red 31, CI Direct Red 28, CI Direct Yellow 44, CI Direct Yellow 28, CI Direct Orange 107, CI Direct Red. 79. CI Direct Red 2, CI Direct Red 81, CI Direct Orange 26, CI Direct Orange 39, CI Direct Red 247, and CI Direct Yellow 142 are represented by the Color Index Generic Name. Substance. The dichroic dye may be used in the form of a free acid or in the form of an amine salt such as an ammonium salt, an ethanolamine salt or an alkylamine salt. The dichroic dye is usually used in the form of an alkali metal salt such as a lithium salt, a sodium salt or a potassium salt. These dichroic dyes may be used alone or in combination of two or more. The polarizer is manufactured, for example, as follows. First, a dye bath is prepared by dissolving a dichroic dye in water so as to have a concentration of about 0.0001 to 10% by weight. Dyeing aids can also be used as needed. For example, the sulphate as a dyeing aid is dissolved in the dyebath so that the concentration is preferably from 1 to 10% by weight. The substrate of the polarizer was immersed in the dye bath thus prepared and dyed. The dyeing temperature is preferably 40 to 80 °C. The alignment of the dye is carried out by stretching the polarizing film substrate before dyeing or the dyed polarizer substrate. As a method of stretching, a method of stretching by a wet method or a dry method or the like can be mentioned. In order to improve the light transmittance, the degree of polarization, and the light resistance of the polarizer, post treatment such as boric acid treatment may be performed. The boric acid treatment differs depending on the kind of the polarizer substrate used or the kind of the dye used, and is usually a boric acid aqueous solution having a concentration adjusted to a range of 1 to 15% by weight, more preferably 5 to 10% by weight, at 30 to 80 ° C, More preferably, the temperature range of 50 to 80 ° C is immersed in the treatment of 14 320867 200937053 polarizing film substrate. Further, if necessary, a fixing treatment may be carried out using an aqueous solution containing a cationic polymer compound in combination. The polarizer 3 used in the present invention preferably has a moisture content of 5% by weight or less, more preferably 1% by weight or less. When a dichroic dye is added to the PVA, the polarizer having a water content of 5% by weight or less can significantly suppress the decomposition of the dye, and the gain of the obtained polarizing plate can be greatly improved. The method for measuring the moisture content of the polarizer 3 is a method in which the polarizer is ventilated and dried at 130 ° C for 20 minutes in an exposed state to determine the ratio of the weight loss of the polarizer weight. That is, the moisture content of the polarizer was calculated from the following formula. Moisture content (%) = [(W 卜 W2) / wi] xi 〇〇 W1 . Weight before polarizer drying: Weight after polarizer drying The adjustment of the moisture content of the polarizer 3 was carried out via a dry polarizer. The drying step for adjusting the moisture content of the polarizer 3 to 5% by weight or less may be a step in which the polarizer 3 is not bonded to the transparent substrates i, 2 at all, or may be one side of the polarizer 3 or The stage after bonding the transparent substrates ❹1 and 2 on both sides. In order to maintain the flatness of the polarizer and to quickly remove moisture from the surface of the polarizer 3 that is not bonded to the transparent substrate, it is more preferable to perform drying at the stage of bonding the transparent substrate on one side. At this time, there is an advantage that moisture does not intrude from the transparent substrate side after drying, and it is easy to maintain the dry state of the polarizer. Further, drying is performed at the stage of bonding the transparent substrate on one side of the polarizer 3. After the transparent substrate is bonded to the other surface of the polarizer, the polarizer can be further dried after drying at a temperature of 130 ° C or lower. good. As a method of drying, a conventionally known method can be used. For example, a heating drying method or a vacuum drying method can be used. From the viewpoint of the easiness of the production equipment of the polarizing plate, a heat drying method is preferred. As the heat drying method, for example, a method of placing in a heating oven, a method of irradiating light to a polarizing plate, and absorbing light by a polarizer to cause heat generation of the polarizing plate itself may be mentioned. The heating temperature in the heat drying method is preferably 130 ° C or less, more preferably 40 ° C to 130 ° C, irrespective of the heating method. By setting the temperature to 40 ° C or higher, the drying can be completed in a short period of time, and by setting it to 130 ° C or lower, deterioration of the adhesive layer and the protective layer and deterioration of the optical characteristics of the polarizer can be suppressed. Next, a method of producing a polarizing plate of the present invention will be described by taking the case of the polarizing plate shown in Fig. 1 as an example. The manufacturing method includes the steps of forming the adhesive layers 4, 5, and joining the polarizer 3 and the transparent substrates 1, 2 via the adhesive layers 4, 5. Of these, it is important to form the adhesive layer under reduced pressure. Thereby, air bubbles are prevented from being mixed into the adhesive layers 4, 5. Further, the bonding between the polarizer 3 of the adhesive layers 4 and 5 and the transparent substrates 4 and 5 is also desirably performed under reduced pressure. At the same time, the formation of the adhesive layers 4, 5 may be formed on one or both of the polarizer 3 and the transparent substrates 1, 2. Specific examples of the method for producing the polarizing plate of Fig. 1 are as follows. (1): A method in which two different adhesives are applied to both surfaces of the polarizer 3 to form the adhesive layers 4 and 5, and then the transparent substrates 1 and 2 are bonded by the adhesive layers 4 and 5. (2): Applying the adhesive A on the transparent substrate 1, bonding the polarizer 3 to the obtained adhesive layer 4, and applying the adhesive B on the polarizer 3 on the adhesive layer 5 of 16 320867 200937053 A method of bonding the transparent substrate 2. (3): The adhesive B is applied onto the transparent substrate 1, the polarizer 3 is bonded to the obtained adhesive layer 4, and the adhesive A is applied onto the polarizer 3, and the transparent substrate 2 is bonded to the obtained adhesive layer 5. Methods. (4): an adhesive A is applied onto the transparent substrate 1, a polarizer 3 is bonded to the obtained adhesive layer 4, and an adhesive // is applied to the transparent substrate 2, and the obtained adhesive layer 5 and polarizer are obtained. 3 bonding method. ❹ (5): The adhesive agent β is applied onto the transparent substrate 1, and the polarizer 3' is bonded to the obtained adhesive layer 4. In addition, the adhesive layer 5 and the polarizer 3 obtained by applying the adhesive core on the transparent substrate 2 are applied. The method of joining. (6): an adhesive A is applied onto the polarizer 3, a transparent substrate is bonded to the obtained adhesive layer 4, and an adhesive β is applied onto the polarizer 3 to bond the transparent substrate to the adhesive layer 5 2 method. (7) The adhesive agent β is applied onto the polarizer 3, the transparent substrate 1 is bonded to the obtained adhesive layer 4, and the adhesive a is applied onto the polarizer 3 to bond the transparent adhesive layer 5 to the bonded adhesive layer 5. The method of the substrate 2. (8): The adhesive layer 5 is applied to the one surface of the polarizer 3 to form the adhesive layer 5, and the adhesive agent β is applied on the transparent substrate 1, and the adhesive of the polarizing agent 3 is bonded to the obtained adhesive layer 4. A method of bonding the transparent substrate 2 to the surface of the gas layer 5 > (9): applying an adhesive layer on one side of the polarizer 3 to form an adhesive layer 5, and 'on the transparent substrate 1 The adhesive A is applied, and the surface of the polarizer 3 to which the adhesive is not applied is bonded to the obtained adhesive layer 4, and the transparent substrate 2 is bonded to the subsequent layer 5. β stomach 320867 17 200937053 Another embodiment of the polarizing plate of the invention is shown in Fig. 2 to Fig. The polarizing plate shown in the above figures differs from the polarizing plate in the i-th image in that the exposed portion (4) 7 of the 'polarized light 11' and the contact with the adhesive layers 4, 5 is covered. Thereby, the heat resistance of the pseudo-vibrator 3 from the intrusion of moisture from the air is prevented. The polarizer 3 is biased in the polarizing plate of Fig. 2, and the exposed portion of the polarizer 3 which is not in contact with the adhesive layers 4, 5 is covered. Further, the adhesive layer (1) is simultaneously covered with the sealant 7. The sealant 7 is formed in the outer peripheral portion of the polarizer 3 and the adhesive layers 4, 5, for example, in the shape of a thin edge of the polarizer 3, formed on all four sides thereof. The polarizing plate of Fig. 3 is an example in which the area of the transparent substrate 2 is smaller than that of the polarizer 3 and the adhesive layers 4, 5, and the polarizer 3 and the adhesive layers 4, 5 located in the narrow portion of the transparent substrate i and the transparent substrate 2 are The outer peripheral portion is covered with the sealant 7. The polarizer transparent substrate 2 of FIG. 4 is smaller than the polarizer 3 and the adhesive layers 4, 5, and the polarizer 3 and the adhesive layers 4, 5 projecting outward from the transparent substrate 1 through the moon substrate 2. The outer peripheral portion is covered with the sealant 7. As the sealant 7, a conventionally known sealant can be used, and it is preferable to have a fluidity at the time of processing and to have a sealing function after curing. For example, a resin which is cured by using an ultraviolet curable resin, a thermosetting resin, or both can be suitably used. When a resin having fluidity during processing is used, the viscosity of the resin before curing is preferably 100 Pa·s or less, more preferably in the range of 〇.1Pa·s to 50 Pa·s. The sealant 7 which can be used in the present invention may be the same type as the adhesive A or B which forms the above-mentioned adhesive layer. As a sealant, 18 320867 200937053, specifically, an ethylene-acid ruthenium copolymer (for example, DuPont· 眶 眶 聚 聚 聚 烟 烟 、 环氧树脂 环氧树脂 环氧树脂 环氧树脂 环氧树脂 环氧树脂 环氧树脂 ce ce ce ce ce ce ce ce ce ce ce ce ce The product name is UV-curable epoxy resin manufactured by ADEKA Co., Ltd., and the product name "Ana-A" is a UV-curable epoxy resin manufactured by Three Bond Co., Ltd., and the product "TB3025G" is UV-curable by "NagaseCheratex & 5l." Product name "XNR5516Z"), polyurethane resin-bonded (4), _ ^ 曰, enameling agent and other thermosetting adhesive; Shi Xi oxygen _ such as UV solid = milk burning, with a Weiwei terminal poly (four) modified money burning In the case of using the curable resin as the sealant 7, the volatilization before curing is preferably 2% by weight or less, more preferably j% by weight or less. For example, when the volatile component is 2% by weight or less of the sealant, it is possible to suppress the occurrence of fine bubbles in the sealant and the application of the sealant under reduced pressure, and the processing yield is greatly improved. The hair component is a value measured according to ‘‘了 ❹ 6249’. Further, the glass transition temperature after the curing of the sealant 7 is above 耽, and the boiling water absorption rate is preferably 4% by weight or less. As a result, heat can be extracted, and moisture intrusion from the atmosphere to the detector can be suppressed, and the partiality of the light is improved. The 'boiling water absorption rate' is the amount of the amount of the cured product of the sealant which is increased after 1 hour in the water of the water, and the percentage of the mass of the cured product before the impregnation is determined according to "JIS κ 6911". The moisture permeability of the sealant 7 is usually 6 〇 g / (m 2.24 hr) or less, more preferably 25 g / m 2.24 hr or less. The moisture permeability of the sealant is 6 〇 g / m 2.24 hr 19 320867 200937053 or less In this case, it is possible to further suppress the intrusion of moisture from the atmosphere into the polarizer, and it is possible to improve the light resistance of the polarizing plate. Here, the 'transmission humidity is obtained by adjusting the sealant to a thickness of 1 〇〇/zm according to "jISZ 0208". The moisture content of the cured product transmitted in an environment of a temperature of 40 ° C and a relative humidity of 90%. An embodiment in which the polarizing plate has two polarizers will be described. In Fig. 5, a polarizer having two polarizers is shown. An example of the embodiment of the polarizing plate. The polarizing plate of Fig. 5 forms the adhesive layers 4a and 4b on the opposite inner faces of the two transparent substrates 2, and the transparent substrate 1 is formed via the adhesive layers 4a and 4b. And 2 pieces of polarizer 3b are respectively installed on 2, and then, followed by The layer 6 joins the faces of the polarizers 3a, 3b on the opposite side of the surface where the adhesive layers 4a, 4b meet. Therefore, the exposed portions of the polarizer, the north and the coating layers 4a, 4b, 6 are made of a sealant 7 By this configuration, moisture is prevented from invading from the air to the polarizers 3a, 3b and the heat load on the polarizers 3a, 3b is alleviated. The glass transition temperature of the adhesive layer 4a and the adhesive layer 6 in f And the difference in glass transition temperature between the carrier layer 6 and the adhesive layer 4b is important. Thus, even a polarizing plate using two polarizers is subjected to heat due to stress deformation generated inside the polarizing plate. When the different agent layers 4a, 4b, and 6 are transferred and absorbed, the defects such as peeling are suppressed, and the effect of the present invention is similarly exhibited in the case of having three or more sheets. The subsequent rotation temperature of the bonding of 3a and the polarizer 3b is preferably in the range of - to -irc and then more = -3 (the range of TC. Further, the polarizer 3a and the substrate 70 are bonded to the substrate 1 at the junction of the substrate 3 20 200937053 The agent layer 4, and the polarizer north and the transparent substrate The glass transition temperature of the coating layer 5 is preferably in the range of 赃 to 翁c, more preferably in the range of 80 to 120 ° C. The glass transition temperature is -8 (TC to -1 G. (10) then #] and glass The above-described example is exemplified as a specific example of the adhesive having a transition temperature of 5 〇 ° C or higher. In the polarizing plate of Fig. 5, the incident light 8 is the absorption axis direction of the polarizer 3b that is initially transmitted. The transmittance is higher than that of the incident light 8 and then the direction of the absorption axis of the polarizer 3a that has passed through. Specifically, for the center wavelength of the light used, the polarizer that transmits the second light is The transmittance in the absorption axis direction is preferably 1% or less, and the transmittance in the absorption axis direction of the polarizer % through which light is first transmitted is preferably 10% to 7% by weight. When the transmittance of the polarizer 3b in the absorption axis direction is less than 1%, the heat generation amount of the polarizer 增大 is increased and there is a fear that the deterioration of the polarizer 3b may be promoted. On the other hand, when the transmittance of the polarizer 3b in the absorption axis direction is more than 7〇%, the amount of heat generated by the polarizer 3a may increase. By setting the transmittance in the absorption axis direction of the polarizer 3b to 10% to 70%, the polarizer 3a and the polarizer 不会 do not cause unevenness in heat load, and it is possible to suppress the polarizer such as the polarizer 3b from being formed. The inferiority of the laminated polarizers. In the same manner, the wavelength of the light center used is different depending on the color of RGB, and the wavelength of the transmittance in the absorption axis direction is measured: Rch is 610 nm, Gch is 550 nm, and Bch is 440 nm. The material and the manufacturing method of the polarizers 3a and 3b can be exemplified as the above-described examples. The above-described examples can be exemplified for the materials of the transparent substrates 1 and 2 and the sealant 7. In the method for producing a polarizing plate shown in Fig. 5, the same as the case where the polarizing plate of the above-mentioned polarizing 21 320867 200937053 is the same, 'including the step of forming an adhesive layering, the servant 6 and the via layer 4a, 4b, 6 will be polarized; §, for example, the step of bonding the transparent substrate 1, 2 . The shapes of the subsequent agent layers 4a, 4b, 6 are carried out under reduced pressure. Specific examples of the method for producing a polarizing plate of Fig. 5 are as follows. (1) The polarizer 3 (4) of the intermediate A which is laminated in the order of the transparent substrate i, the adhesive layer 4a, and the polarizer 3a is not formed with the surface of the adhesive layer 4a (hereinafter referred to as the middle) The adhesive layer 6 is formed on the polarizer surface of the body A, and the adhesive layer 6 is laminated with the intermediate body B in the order of the transparent substrate 2, the adhesive layer 4b, and the polarizer 3b. A method of joining the surface of the adhesive layer 4b (hereinafter sometimes referred to as a polarizer surface of the intermediate B). (2) A method of forming the adhesive layer 6 on the polarizer surface of the intermediate b and bonding the polarizer faces of the intermediate body A. (3) A method of joining the polarizer surface of the intermediate B to the adhesive layer 6 of the intermediate c which is laminated in the order of the transparent substrate i, the adhesive layer, the polarizer 3a, and the adhesive layer 6. (4) A method of joining the polarizer surface of the inter-substrate A to the intermediate (four) interface layer 6 in which the transparent substrate 2, the adhesive polarizer 3b, and the adhesive layer 6 are laminated in this order. The layered storm LI money shines fresh 3&, then the fine 6, the foot 3b sequence of the intermediate E, the polarizer ^ does not form the adhesive layer 6 4 followed by the 4a, and the adhesive layer ^ and the transparent substrate i 320867 22 200937053 Joining to form medium (4), then, on the surface of the (4) _: layer: (hereinafter sometimes referred to as the polarizer surface S of the intermediate F, the splicer layer 4b, and then bonding the fourth (4) 4b to the transparent substrate 2 (6) The adhesive layer 4b is formed on the surface of the polarizing n 3b of the intermediate E where the adhesive layer is not formed, and the intermediate layer G is formed by the adhesive layer 4b and the transparent substrate. Then, no adhesive is formed in the polarizer 3a; The surface of 6 (hereinafter sometimes referred to as the polarizer surface of the intermediate G) forms two

A method of bonding the adhesive layer 4a' and bonding the adhesive layer 4a to the transparent substrate. (7) A method of forming a subsequent _ &amp; and bonding the adhesive sound 4a to the polarizer surface of the intermediate g on the transparent plate 1. (8) A method of forming an adhesive layer on the transparent substrate 2 and bonding the adhesive layer 4b to the polarizer surface of the intermediate p. The method for producing the intermediate A can be exemplified by a method in which an adhesive layer 4a is formed on one surface of a polarizer, a bonding layer is known to be bonded to the transparent substrate i, or an adhesive layer 4a is formed on one side of the transparent substrate. A method of joining the adhesive layer 4a and the polarizer 3a. The method for producing the intermediate B includes a method of forming the adhesive layer 4b on one surface of the polarizer 3b, and bonding the adhesive layer 4b and the transparent substrate 2; or forming an adhesive on one side of the transparent substrate 2. Layer 4b, and a method of joining the adhesive layer 4b and the polarizer 3b. As a method for producing the intermediate C, an adhesive layer 4a is formed on one surface of the polarizer 3a, and an adhesive layer 6' is formed on the other surface of the polarizer 3a. The adhesive layer 4a and the transparent substrate are bonded. Method; or a method of forming an adhesive layer 6 on the polarizer face of Intermediate A. 23 320867 200937053 As a method for producing the intermediate D, it is exemplified that the adhesive layer 4b is formed on one surface of the polarizer %, and the adhesive layer 6 is formed on the other surface of the polarizer 3b, and the adhesive layer 4b is formed. A method of bonding to the transparent substrate 2; or a method of forming the adhesive layer 6 on the polarizer surface of the intermediate B. Fig. 6 and Fig. 7 show other embodiments of a polarizing plate having two polarizers. The polarizing plate of Fig. 6 is an example in which the area of the transparent substrate 2 is smaller than that of the polarizers 3a, 3b and the adhesive layers 4a, 4b, 6, the polarizers 3a, 3b located at the narrow portions of the transparent substrate 1 and the transparent substrate 2, and then The outer peripheral portions of the agent layers 4a, 4b, and 6 are covered with a sealant 7. The polarizing plate of Fig. 7 is an example in which the area of the transparent ruthenium substrate 1, 2 is smaller than that of the polarizers 3a, 3b and the adhesive layers 4a, 4b, 6, the polarizer 3a which protrudes outward from the transparent substrate 1 and the transparent substrate 2, The outer peripheral portion of the 3b and the adhesive layers 4a, 4b, and 6 is covered with the sealant 7. Fig. 8 and Fig. 9 show still another embodiment of a polarizing plate having two polarizers. The polarizing plate of Fig. 8 is different from the polarizing plate of Fig. 5 in that protective layers 9a, 9b are formed on the opposite sides of the faces of the polarizers 3a, 3b that are in contact with the adhesive layers 4a, 4b, respectively. These protective layers a 9a, 9b are joined by the adhesive layer 6. Regarding the polarizing plate of Fig. 8, the glass transition temperature of the adhesive layer 4a and the adhesive layer 6, and the glass transition temperature of the adhesive layer 6 and the adhesive layer 4b are different. Thus, the stress deformation occurring inside the polarizing plate due to heat or the like is absorbed and relaxed by the adhesive layers 4a, 4b, and 6 having different glass transition temperatures, and it is possible to effectively suppress problems such as peeling of the polarizer or the like. At the same time, the suitable glass transition temperature of the adhesive layer 4a, the adhesive layer 4b, and the adhesive layer 6 is the same as in the case of Fig. 5. 24 320867 200937053 • As the material of the protective layers 9a and 9b used in the present invention, for example, an ethylene-acid field copolymer (for example, BYNEL (registered trademark, DuPont, polyglycolic binder, epoxy resin) The following agent and poly IU resin are connected to UV-curable resin manufactured by Rugao Co., Ltd., and the product name is "^^, (example 2 line curing type Wei burning, ♦ oxygen burning RTV, miscellaneous rubber, with base end (four) modification money) An ultraviolet curable adhesive such as cyanoacrylate or cyanopropylene; Ο: an epoxy-curable adhesive such as a fat. Among them, a good-coolant type adhesive is preferable from the viewpoint of preventing the difference between the two substrates and the polarizers 3a and 3b. The formation of the protective layers 9a and 9b to the polarizers 3a and 3b can be exemplified by bonding the protective layers 9a and 9b in the form of a film to the polarizers 3a and 3b, or coating the surfaces of the polarizers 3a and 3b. It is formed as a curing resin of the protective layers 9a and 9b and cured. Forming a protective layer to the polarizers 3a and 3b, for example, % may be a step before the polarizers 3a, 3b are bonded to the transparent substrates 1, 2, or may be Post-step. Mechanical strength via the formation of protective layers 9a, 9b' polarizers 3a, 3b on polarizers 3a, 3b It is possible to improve the yield in the production. Further, it is possible to prevent cracking of the polarizers 3a and 3b during long-term use in the projection type liquid crystal display device. When the substrates of the polarizers 3a and 3b are made of pva, the protective layer is formed. When 9a and 9b are cured by applying a curable resin, it is preferable to use a thermosetting resin and an ultraviolet curable resin as the curable resin to be used, and additionally, at this time, since a high temperature state is not required in the curing step, The optical property of the polarizing plate is not lowered, so that the ultraviolet curable resin is particularly preferable. Further, the thickness of the protective layer 9a, 9b is preferably 0.11 m to 30 #m, more preferably When the thickness of the protective layers 9a and 9b is equal to or greater than that, the mechanical strength of the polarizers 3a and 3b is improved, and the polarizers 3a and 3b can be prevented from being damaged. When the thickness of the protective layers 9a and 9b is 30 or less, the thickness of the protective layers 9a and 9b is 30 or less. Since the heat generated by the light absorption by the polarizers 3a and 3b can be efficiently conducted to the transparent substrates 1, 2, the light resistance of the polarizing plate can be improved. The polarizing plate of Fig. 9 is passed through the transparent substrates 1 and 2 via The agent layer 4a, 4b is installed The polarizers 3a and 3b further form protective layers 9a and 9b on the polarizers 3a and 3b. Then, the protective layers 9a and 9b are bonded to the transparent substrate 10 by the adhesive layers 6a and 6b, and the polarizers 3a and 3b are bonded. The exposed portion is sealed with a sealant 7. As with the polarizing plate of Fig. 8, the glass transition temperature of the adhesive layer 4a and the adhesive layer 6a, and the glass transition temperature of the adhesive layer 6b and the adhesive layer 4b are respectively The suitable glass transition temperatures of the adhesive layers 4a, 4b, 6a, 6b are the same as in the case of Fig. 5. With such a configuration, the heat generated by the polarizers 3a and 3b is transmitted to the transparent substrate 10 in addition to the transparent substrates 1, 2, and the heat dissipation of the polarizers 3a and 3b is further promoted. Next, an optical member relating to the present invention will be described. In the optical member of the present invention, the polarizing plate and the retardation film are joined together, and a retardation film is bonded to the outer surface of the transparent substrate in the polarizing plate described above. In other words, the optical member is a surface on the opposite side of the surface of the first transparent substrate of the polarizing plate of the present invention that is in contact with the first adhesive layer, and a surface of the second transparent substrate that is in contact with the second adhesive layer. On the opposite side, at least one side is selected to join the retardation film. Fig. 10 shows an example of an optical member of the present invention, 26 320 867 200937053. In the optical member of Fig. 10, the retardation film 12 is bonded to the surface of the transparent substrate 3 of the polarizing plate shown in Fig. 2 via the adhesive layer 11. In addition, examples of the adhesive for forming the adhesive layer 11 include an elastic adhesive, an adhesive, and a curable adhesive, and a curable adhesive is preferably used. The retardation film 12 used in the present invention is not particularly limited, and a conventional phase difference film can be used. As the retardation film 12, for example, discotic liquid crystals of oblique orientation (inclined alignment) or mixed alignment (hybrid alignment) can be used as a matrix held by a crosslinked ® transparent organic polymer. Phase difference film. As the matrix material of the retardation film, an organic polymer film excellent in environmental resistance and chemical resistance such as triethylenesulfonate polycarbonate or polyethylene terephthalate is suitable. The polarizing plate of the present invention can be used, for example, in a projection type liquid crystal display device (projector) having a liquid crystal display panel (hereinafter sometimes referred to as "LCD panel"). The optical system of the rear projector shown in Fig. 13 will be described in detail as an example. The light beam having the high-pressure mercury lamp 111 as a light source is firstly uniformized and polarized in the cross-beam cross section by the first lens array 112, the second lens array 113, the polarization conversion element 114, and the superimposing lens 115. Specifically, the light beam emitted from the light source 111 is divided into a plurality of minute light beams by the first lens array 112 in which the minute lenses 112a are arranged in a matrix. The second lens array 113 and the superimposing lens 115 have a form in which the three divided panels are irradiated with the entire three LCD panels 140R, 140G, and 140B as illumination objects, and therefore, the incident side surfaces of the respective LCD panels are formed into a substantially uniform overall shape. Illumination of 200937053. The polarization conversion element 114 is generally disposed between the second lens array 113 and the superimposing lens 115 by the polarization beam splitter array. As a result, the randomly polarized light from the light source is converted into polarized light having a specific polarization direction in advance, and the amount of light loss in the incident side polarizing plate to be described later is reduced, thereby increasing the brightness of the screen. The uniformized and polarized light passes through the mirror 122, and sequentially passes through the dichroic mirrors 121, 123, and 132 for separating into three primary colors of RGB, and is separated into a red light path, a green light path, and a blue light path, and respectively incident on the LCD panel. 140R, 140G, 140B. Regarding the LCD panels 140R, 140G, and 140B, the polarizing plate (incidence side) 142 and the polarizing plate (ejecting side) 143 of the present invention are disposed on the incident side and the outgoing side, respectively. Two polarizing plates which are disposed on the incident side and the output side with the liquid crystal panel interposed therebetween in each of the RGB optical paths will be described. The polarizing plate (incidence side) 142 and the polarizing plate (injecting side) 143 disposed in the respective optical paths are arranged in parallel with the absorption axis, and are displayed on the respective LCD panels i4〇R, l4 disposed in the respective optical paths. In G and 140B, a polarization state controlled by each pixel is converted into a light amount via an image signal. The polarizing plate of the present invention has a common configuration of all the optical paths of the red light path, the green light path, and the blue light path, and is particularly effective in which the optical path is effective as a polarizing plate excellent in durability. Among them, the blue light path and the green light path are particularly effective. When at least one of the i-th transparent substrate and the second transparent substrate included in the polarizing plate is a single crystal transparent substrate, it is preferable to provide a polarizing plate such that the single crystal transparent substrate is on the side of the LCD panel 320867 28 200937053. Further, when both the emission side and the incident side of the LCD panel are provided with the polarizing plate, it is preferable that the polarizing plate on both the emitting side and the incident side is provided on the side of the LCD panel with the single crystal transparent substrate side. Corresponding to the image data of the LCD panels 140R, 140G, and 140B, the incident light is transmitted through each of the pixels at different transmittances, and the optical image thus produced is synthesized via the dichroic dichroic mirror 150 and passed through the projection lens 1 The 〇 is expanded onto the screen 180. EXAMPLES The following examples are given to illustrate the invention in more detail, but the invention is not limited thereto. (Example 1) As Example 1, a polarizing plate having the structure shown in Fig. 2 was produced as follows. First, a polyvinyl alcohol film (manufactured by Kuraray Co., Ltd., trade name "VF-PX", hereinafter referred to as "PVA film,") is uniaxially stretched, and dyed with a polyazo-based blue-absorbing dye to make it Drying, a polarizer 3 for a blue light path of the projector is obtained. The thickness of the polarizer 3 is 28 mm, and the degree of polarization at 44 〇 is 99.9%, and the transmittance in the absorption axis direction is passed through acrylic acid as the adhesive A. The adhesive layer 4 made of an adhesive (manufactured by Lintec, glass transition temperature: -50 ° C, hereinafter referred to as "adhesive 1"), and one side of the polarizer 3 thus obtained is bonded to the transparent layer The substrate (thickness 〇. 5mni of the slate glass substrate (silicate glass)). Next, the moisture of the polarizer 3 is reduced to 5% by weight or less by drying in a 6 (TC oven for 24 hours. The adhesive layer 5 formed by an epoxy-based ultraviolet curable resin (manufactured by Adeka Co., Ltd., trade name "KR695A", glass 320867 29 200937053 glass transition temperature: 90 ° C) as an adhesive β under reduced pressure Transparent substrate (sapphire substrate with a thickness of 0.5 mm, manufactured by Kyocera, heat conduction) The ratio of 40 W/mK was bonded to the other side of the polarizer 3. Then, the ultraviolet curable epoxy resin (manufactured by Three Bond Co., Ltd., trade name "TB3025G" was applied under reduced pressure so as to cover the exposed portion of the polarizer 3. The sealant 7 formed by the moisture permeability l〇g/m2 · 24 hr was solidified to obtain a polarizing plate having the structure shown in Fig. 2. In addition, the air contact between the sapphire substrate and the blue plate glass substrate used was The surface of the dielectric layer is subjected to vacuum deposition to form an antireflection treatment for the dielectric layer. 〇 <Evaluation of initial light resistance> In order to evaluate the light resistance of the prepared polarizing plate, the polarizing plate thus produced is transparent to the polarizing plate. In the optical path for the blue light path of the light resistance evaluation device shown in FIG. 14 , the surface of the substrate 1 is placed on the LCI panel side, and the light irradiation is started to investigate whether or not light leakage has occurred due to deterioration (hereinafter referred to as For "initial assessment,,". The results are shown in Table 2. In the table, “〇,” indicates that the light leakage is less than G. 5% after 24 hours of evaluation, and there is no deterioration caused by light guide. “x” indicates that the light leakage is 〇·5% or more after 24 hours of evaluation. (Evaluation of long-term light resistance) The obtained polarizing plate was subjected to the same light resistance evaluation (hereinafter referred to as "long-term evaluation") after leaving it for 60 hours in an environment of 60% relative humidity (hereinafter referred to as "long-term evaluation"). Evaluation of heat resistance> In order to evaluate the heat resistance of the prepared polarizing plate, the polarizing plate was stored in an environment of 110 30 320867 200937053 ° C for 72 hours, and then the polarized shirt was left (hereinafter referred to as heat resistance test). In Table 2. In the table, "〇" indicates that the polarizer is not peeled off and heat resistance is strong, and "X" indicates that the polarizer is peeled off and the heat resistance is poor. 1 The other _photometric evaluation device of Fig. 14 is manufactured by Philips. The blue high-pressure mercury lamp is used as the light source 2q, and has the same optical system as the optical system of the rear projection television, such as the polarization beam splitting Ο 23, the lenticular lens 25, and the like, as the amount of illumination light to the polarizing plate 26, which is 30 W per W. Rhythm leakage refers to the phenomenon of polarization of the polarizing film caused by the light resistance evaluation device, and absorbs the financial (four) surface rate of the county. The polarizing plate of the evaluation object and the normal polarizing plate are arranged to be orthogonally biased by r〇ssed. In the case of mcols), the polarizing filament which should originally have a low transmittance is now transmitted through the leak. (Examples 2 to 8) The transparent substrate, the transparent substrate 2, the sealant 7, the adhesive A, and the subsequent bismuth B are shown in Table 1. A polarizing plate was produced in the same manner as in Example , except that the drying conditions of the polarizer 3 were carried out under the conditions described in the Table 3. The prepared polarizing plate was evaluated in the same manner as in Example 。. The results are shown in Tables 1 and 2, and the other 'Adhesive 2 in Table 1' refers to an acrylic adhesive (made by Lintec, glass transition temperature - 6〇t:), and "XNR5542" means epoxy. UV curable resin (product name, glass transition temperature, manufactured by Nagase Chemtex Co., Ltd., 105. K, "KR695B" means epoxy-based ultraviolet curable resin (trade name KR695B, manufactured by ADEKA CORPORATION, glass transition temperature is 320867 31) 200937053 95°C ) ' “XNR5516Z” means UV solid Epoxy resin (manufactured by Nagase-Chemtex, trade name, moisture permeability l〇g/m2.24hr), and "EP582" means ultraviolet curable epoxy resin (manufactured by Cemedin, trade name, moisture permeability 20g/m2 · (Example 9) The same procedure as in Example 1 was carried out except that the polarizer 3 of Fig. 2 was a polarizer made of a polyvinyl alcohol/polyethylene block copolymer. (Comparative Example 1) 〇 As the adhesives A and B, epoxy-based ultraviolet curable resin (trade name "KR695A", manufactured by ADEKA CORPORATION, glass transition temperature: 90 C) was used. In the same manner as in Example 1, a polarizing plate was produced. The results are shown in Tables 1 and 2. The prepared polarizing plate was stored in an environment of iio °c for 72 hours. As a result, the polarizer was peeled off, and it was confirmed that the heat resistance was poor. 32 320867 200937053 • Table i Transparent substrate 1 Transparent substrate 2 Adhesive A Adhesive B Sealant---r——. Drying conditions Example 1 Sapphire green glass adhesive 1 KR695A TB3025G ------ 60° Cx24 hours Example 2 Sapphire Crystal Adhesive 1 KR695A TB3025G 5〇°Cx72 hours Example 3 Crystal Crystal. Adhesive 1 KR695A TB3025G 70°〇12 hours Example 4 Crystal Green Board Glass Adhesive 1 XNR5542 XNR5516Z 80 °Cx48 hours Example 5 Sapphire Green Glass Glass G Adhesive 2 XNR5542 XNR5516Z 80°〇48 hours Example 6 Magnesium Oxide Oxide Adhesive 2 XNR5542 XNR5516Z 80°〇24 hours Example 7 Magnesium Oxide----- Spinel----- Adhesive 2 KR695B EP582 80°〇24 hours Example 8 Magnesium telluride tipping stone—----_ Adhesive 2 KR695B EP582 80°C×6 hours Comparative example 1—- -- Sapphire Green Board Breaking---- KR695A KR695A TB3025G 60°Cx24 Hours----- i ❹ 33 320867 200937053 Table 2

__5^* Initial heat resistance - _ long-term embodiment 1 〇〇〇 Example 2 〇〇〇 Example 3 〇〇 〇〇 Example 4 〇〇〇 Example 5 〇〇 〇〇 Example 6 1--- - Example 7 〇〇〇 Example 8 〇 - 丨 _ 〇〇 Comparative Example 1 1 ' _ _ 1 〇〇 X

(Example 10) As Example 10, the polarization 1 having the structure shown in Fig. 5 was produced as follows. First, the PVA film was uniaxially stretched, and the blue absorbing wood of the polyazo type was used for the variegated color. 'Make it dry' for the projector's blue light path, vibrator 仏 and 3b, respectively. The polarizer 3a has a degree of polarization of 32.0% at 440 nm, a transmittance of 46 〇% in the absorption axis direction, a polarization degree of 99.9% in the direction of the polarizer, and a transmittance of 〇.〇% in the absorption axis direction. An acrylic adhesive 1 which is an adhesive for forming the adhesive layer β is applied to one surface of the polarizer 3a (manufactured by Lintex Co., Ltd.: glass transition temperature _5 Å. 〇, the adhesive layer 6 and the polarizer 3b) Joining to obtain the intermediate e. On the one side of the sapphire substrate having a thickness of 55 mm which is transparent, the plate 1 is coated with a purple phase-forming epoxy resin (10), which is an adhesive for forming the adapter layer 4a, 320867 34 200937053 - The product name "KR695A" and the glass transition temperature of 90. The adhesive layer 4a and the surface of the polarizer 3a of the intermediate E which are not formed with the adhesive layer 6 are bonded to each other to obtain an intermediate F. Next, the intermediate is obtained. F. After drying in an oven for 80 hours, an epoxy-based ultraviolet curable resin (manufactured by Nagase Chemtex Co., Ltd.) which is an adhesive for forming the adhesive layer 4b is applied to a glass substrate having a thickness of 0.5 mm as a transparent substrate 2. The name "XNR5542", glass transition temperature is 105 ° C), and the bismuth polarizer face of the adhesive layer 4b and the intermediate f are joined under reduced pressure. Then, as the sealant 7, epoxy-based ultraviolet curing is used. Resin (made by Three Bond, trade name "TB3" 25G", 'transparent humidity 10g/m2 · 24hr), the polarizer 3a, the polarizer complement, the adhesive layer 4a, the adhesive layer 4b, and the exposed portion of the adhesive layer 6 are covered to obtain the polarization of the structure shown in Fig. 5. The thickness of the prepared polarizing plate was determined as "the polarizing plate thus obtained, and the light resistance f estimating device shown in Fig. 14 was used to perform the leveling evaluation (initial evaluation and evaluation) in the same manner as in the first embodiment. In addition, the evaluation of the heat resistance was carried out. The results are shown in Tables 3 and 4. The evaluation of miniaturization The thickness of the polarizing plate produced was measured, and the miniaturization was evaluated. In Table 2. In the table, '“〇, indicating that the thickness of the polarizing plate is small Unnn' can be miniaturized'. V indicates that the thickness of the polarizing plate is 15 mm, and cannot be miniaturized. (Examples 11 to 22) In addition to the transparency of the transparent substrate The substrate 2, the sealant 7, the adhesive layer 4, the core adhesive layer 4b, and the adhesive layer 6 are smeared by the clip 3, and the material of the strip is not used. The polarizer knows that the drying conditions of 320E67 35 200937053 3b are Under the conditions described in Table 3, Example 1 was prepared in the same manner as the polarizing plate. Next, the evaluation of the remaining and actual miniaturization, the evaluation of the material (initial evaluation = the same heat resistance evaluation. The results are shown in Table 3 and Table 4. Long-term evaluation) to (Example 23) except as a polarization The polarizer is formed from the .a ^4 Λ _ 埽 埽 block copolymer to the polarizing plate of the present invention, except for the polarizer formed by poly _ / poly. The sample operation can be obtained (Comparative Example 2)

In the polarizing plate shown in Fig. 5, an epoxy-based ultraviolet curable resin (trade name "KR695A", manufactured by ADEKA CORPORATION, and a glass transition temperature of 9 Å are used for the adhesive layers 4a and 4Mn6. A polarizing plate was produced in the same manner as in Example 10, and the results are shown in Tables 3 and 4. The prepared polarizing plate was stored in an environment of 1 HTC for 72 hours, and the polarizer was peeled off to confirm heat resistance. (Comparative Example 3) As a comparative example 3, a polarizing plate having the structure shown in Fig. 12 was produced as follows. First, both sides of the polarizer 3a and the polarizer 3b obtained in the same manner as in Example 10 were used for the carboxyl group. Modified polyvinyl alcohol resin (product name: KL318) with water-soluble polyamine resin (product name: Sumirez Resin 65 (〇 as an active ingredient of an adhesive, bonded to a thickness of 80/ζιη of acetaminophen A film (KC8UY, manufactured by Konica Co., Ltd., hereinafter referred to as 8UYTAC) S was used to form a polarizing film, and a 0.5 mm sapphire substrate (manufactured by Keyocera Co., Ltd.) was bonded to one surface of the polarizing film containing the polarizer 3a via an adhesive layer & Polarized sheet. This 320867 36 200937053 • ^ The polarizing plate was formed on the single side of the polarizing layer 3b, and the crystal substrate of the 5 mm crystal substrate was placed through the adhesive layer 4. The direction in which the two polarizing plates were incident on the light 8 was arranged as shown in Fig. 12. In addition, two polarizing plates were disposed at intervals of 1 mm. The thickness including the polarizing plate pitch was about 2.5 mm when set. The results are shown in Tables 3 and 4. Table 3 Transparent Jfe] Transparent substrate 2 Glass adhesion Agent 4a KR695A --- Example 10 Γ ' &quot;* ~ Example 11 Sapphire Adhesive 4b Bile 5542 Sealant XNR5516Z Drying Conditions - 1 80 ° C x 24 hours Example 12 Γ - Glass Crystal Sapphire Glass KR695A KR695A Adhesive 1 point Agent 1 KNR5542 XNR5516Z 80°Cx24 hours KNR5542 XNR5516Z 80°Cx24 hours Example 13 Glass crystal KR695A ----- Adhesive steel 1 KNR5542 XNR5516Z 80°Cx48 hours Example 14 Spinel crystal KR695A Li agent 1 KNR5542 XNR5516Z 80 ° C x 48 hours Example 15 - Crystal spinel KR695A Adhesive 1 KNR5542 XNR5516Z 80 ° C x 48 hours Example 16 Spinel glass KR695A Adhesive 1 KNR5542 XNR5516Z 80 ° Cx48 Hour Example 17 Glass Spinel KNR5542 Adhesive 2 KR69SA TR302SG 7ners/&gt;iQ .uirt Example 18 Crystal Spinel KNR5542 ------ Adhesive 2 KR695A TB3025G 70°C x 48 Hour Example 19 Spinel Water Complete KNR5542 Adhesive 2 KR695A. TB3025G 70°Cx48 Hour Example 20 Sapphire Crystal KNR5542 Adhesive 2 KR695A TB3025G 90°C x 48 Hour Example 21 Crystal Sapphire KNR5542 Adhesive 2 KR695A TB3025G 90°C x 48 Hour Example 22 A 1 Spinel Stone spinel KNR5542 Adhesive 2 KR695A TB3025G 90°Cx48 hours Comparative Example 2 Sapphire glass KR695A KR695A KR695A XNR5516Z 80°Cx48 hours Comparative example 3 Sapphire crystal — — — — 37 320867 200937053 Table 4

The polarizing plate of the present invention is excellent in light resistance and can be miniaturized. Therefore, when it is used in a liquid crystal display device, it is possible to achieve a reduction in brightness and a long life of the optical system. Further, the polarizing plate of the present invention is excellent in initial light resistance, long-term light resistance, and heat resistance. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an example of a polarizing plate of the present invention having a sheet polarizer. 320867 38 200937053 - Fig. 2 is a view showing another configuration example of the polarizing plate of the present invention having one polarizer (embodiments of Examples 1 to 8 and Comparative Example 1). Fig. 3 is a view showing another configuration example of the polarizing plate of the present invention having one polarizer. Fig. 4 is a view showing another configuration example of the polarizing plate of the present invention having one polarizer. Fig. 5 is a view showing a configuration example of the polarizing plate of the present invention having two polarizers (constitution views of Examples 10 to 23). ® Fig. 6 is a view showing another configuration example of the polarizing plate of the present invention having two polarizers. Fig. 7 is a view showing another configuration example of the polarizing plate of the present invention having two polarizers. Fig. 8 is a view showing another configuration example of the polarizing plate of the present invention having two polarizers. Fig. 9 is a view showing an example of the constitution of the polarizing plate of the present invention having two polarizers. Fig. 10 is a view showing an example of the configuration of an optical member of the present invention. Fig. 11 is a view showing a configuration of a conventional polarizing plate. Fig. 12 is a view showing the configuration of a polarizing plate used in Comparative Example 3. Figure 13 Projector light path diagram. Figure 14 is a schematic view of the light resistance evaluation device. [Description of main components] 1 transparent substrate (first transparent substrate) 2 transparent substrate (second transparent substrate) 39 320867 200937053 3, 3a, 3b polarizers 4, 4a, 4b, 5, 6, 6a, 6b, 11 Agent layer 7 Sealant 8 Irradiation light 9a, 9b Protective layer 10 Transparent substrate (3rd transparent substrate) 12 Phase difference film 20 High pressure mercury lamp 21 UV/IR cut filter 22 Fey eye lens 23 Polarizing beam splitter Array 24 Dichroic mirror 25 Lens 26 Sample holder 27 White light 28 Red, green light 29 Blue light 111 High pressure mercury lamp 112 Lens array 112a Tiny lens 113 Lens array 114 Polarizing light conversion element 115 Overlapping lens 121 &gt; 123, 132 dichroic mirror 122 mirror 134 mirror 135 lens 140R red LCD panel HOG green LCD panel 140B blue LCD panel 142 polarizer (incident side) 143 polarizer (injection side) 150 cross dichroic mirror 170 projection Lens 180

〇 40 320867

Claims (1)

200937053 ^ VII. Patent Application Range: 1. A polarizing plate in which at least two transparent substrates are relatively isolated, and are disposed between a first transparent substrate located at one outermost side and a second transparent substrate located at the outermost side of the other side. a polarizing plate having at least one polarizer, wherein a first scabbard layer is provided on one side of each of the polarizers, and a second adhesive layer is provided on the other side, the first adhesive layer and the second subsequent layer The glass transition of the layer is different. 2. The polarizing plate according to claim 2, wherein in the j-th subsequent layer and the second adhesive layer, one of the adhesive layers is formed of an elastic adhesive or an adhesive, and the other adhesive layer It is formed of a curable adhesive. 3. The polarizing plate of claim 1, wherein a first polarizer is disposed between the first transparent substrate and the second transparent substrate, and the polarizer is provided by the first adhesive The layer is bonded to the first transparent substrate, and the second adhesive layer is bonded to the second transparent substrate. 4. The polarizing plate of claim 1, wherein the first adhesive layer is formed on the inner surface of the first transparent substrate and the second transparent substrate, and the adhesive layer is formed by the household Different phase wiper polarizers are mounted on the respective transparent substrates. 5. The polarizing plate of claim 4, wherein the second bonding agent 320867 41 200937053 is joined by a layer: a polarizer mounted on the first transparent substrate is in contact with the _ first adhesive layer The surface on the opposite side of the surface and the surface on the opposite side of the surface of the polarizer attached to the second transparent substrate that is in contact with the first adhesive layer. 6. The polarizing plate of claim 4, wherein the polarizer attached to the first transparent substrate and the second transparent substrate is in contact with the first adhesive layer On the opposite side, 'protective layers are respectively formed, and the protective layers are joined by a second adhesive layer. 7. The polarizing plate of claim 4, wherein the 'the polarizer attached to the first transparent substrate and the second transparent substrate' is in contact with the first adhesive layer A protective layer is formed on each of the opposite sides, and the third transparent substrate is bonded to the second transparent substrate via the second adhesive layer. 8. The polarizing plate of claim 4, wherein the light having a center wavelength of 440 nm is respectively mounted on the first transparent substrate and the polarizer in the second transparent substrate The transmittance in the absorption axis direction is 10% to 70%, and the transmittance in the absorption axis direction of the other polarizer is 1% or less. 9. The polarizing plate of claim 4, wherein 'the absorption of one of the polarizers attached to the first transparent substrate and the second transparent substrate for light having a center wavelength of 550 ηηη The transmittance in the axial direction is 10% to 70%, and the transmittance in the absorption axis direction of the other polarizer is 1% or less. The polarizing plate of claim 4, wherein one of the polarizers attached to the first transparent substrate and the second transparent substrate is light having a center wavelength of 42 320867 200937053 • 61 〇 nm The transmittance of the polarizer in the absorption axis direction is 10% to 70%, and the transmittance of the other polarizer in the absorption axis direction is 1% or less. 11. The polarizing plate of claim 1, wherein the polarizer has a moisture content of 5% by weight or less. 12. The polarizing plate according to claim 2, wherein the polarizer is a polarizer that adsorbs a dichroic dye or iodine on a polarizer substrate of a polyvinyl alcohol resin. The polarizing plate of claim 1, wherein the polarizer is a film formed of a polyethylol/poly-block copolymer. 14. The polarizing plate of claim 1, wherein at least one of the i-th transparent substrate and the second transparent substrate has a thermal conductivity of 5 W/(m. 10 or more. 15. In the polarizing plate of the first aspect, the material of one of the second transparent substrate ❹ and the second transparent substrate is at least one selected from the group consisting of crystal, sapphire, magnesia, and spinel, and the other material. Is at least one selected from the group consisting of magnesium oxide, spinel, quartz glass, silicate glass, borosilicate glass, and crystal. 16) The polarizing plate of claim 1, wherein The transparent substrate of the transparent substrate and the second (four) substrate towel is at least a square crystal. The optical member is a polarizing plate and a phase difference according to any one of the above claims. The method of manufacturing a polarizing plate according to any one of the preceding claims, wherein the forming of the second adhesive layer and/or the second subsequent step under reduced pressure is performed. Step of the agent layer. The manufacturing method of claim 18, further comprising the step of drying the polarizer at a temperature of 13 ° C or lower. 20. A projection type liquid crystal display device having any of the claims i to 16 - a polarizing plate and a liquid crystal display panel. 1. The projection type liquid crystal display of the 2Gth item of claim 4, wherein at least one of the first transparent substrate and the second transparent substrate is transparent to the single crystal germanium. The substrate 'the polarizing plate is provided such that the transparent substrate of the single crystal becomes the liquid crystal display panel side. Ο 320867