TWI269893B - Polarizing plate comprising linearly polarizing film and phase retarder - Google Patents

Abstract

A polarizing plate comprises a linearly polarizing film and a phase retarder. The linearly polarizing film has a longitudinal direction and an absorption axis. The phase retarder has a longitudinal direction and a slow axis. The longitudinal direction of the linearly polarizing film is essentially parallel to the longitudinal direction of the phase retarder. One of the absorption axis and the slow axis is essentially parallel to the longitudinal direction. The other is essentially neither parallel nor perpendicular to the longitudinal direction.

Description

1269893 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明(polarizing film) and a "phase retarder" polarizing plate, wherein the polarizing film and the retarder are arranged in the longitudinal direction and substantially parallel to each other. The present invention also relates to a roll polarizing plate in which linear polarization is performed. The film and the λ/4 plate are arranged such that the absorption axis of the film is at an angle of 45 ° of the retardation axis of the λ/4 plate. Further, the present invention relates to an optical compensation film, a roll-shaped polarizing plate and a "liquid crystal cell π (1 Iquidcrysta 1 ce 11), which is sealed with a nematic liquid crystal that can be bent or mixed. The orientation vector of the liquid crystal changes its direction as the voltage applied to the liquid crystal cell. If the voltage changes, the angle between the orientation vector and the substrate also changes. (b) Compared with the cathode ray tube (CRT), the "liquid crystal display" (hereinafter abbreviated as LCD) has the advantages of thin thickness, light weight and low power consumption. Therefore, the LCD has been widely used, for example, for notebook personal use. Computers, monitors, televisions, personal digital assistants (PDAs), cell phones, car navigation systems or video cameras. The most common LCD is a "twisted nematic" (TN) type of cell, in which a twisted nematic liquid crystal is used. However, the TN type The display will change color or contrast depending on the direction of viewing. In addition, the reaction time is not completely satisfactory. US Patent 4,5 8 3,8 2 5 and 5,4 1 0,4 2 2 The LCD of the liquid crystal film of the curved alignment mode has a rod-shaped liquid crystal molecule above, and the bottom is substantially reverse (symmetric). Since the upper rod-shaped liquid crystal molecules and the lower 1268893 are symmetrically arranged, the curved alignment mode The liquid crystal chip is optically compensated by itself. Therefore, this mode is called OCB (optical compensation bending) mode. The LCD of 〇c B mode must be equipped with an optical compensation film to avoid the front view. The hysteresis of the image and the enlargement of the viewing angle. The optical compensation film includes a transparent carrier and an optically anisotropic layer, and is disclosed in Japanese Patent Application Laid-Open No. Hei. No. Hei. No. Hei. No. 6 (1 9 9 6 ) 2 1 4 1 1 6 5 8 3,6 7 9 and 5,6 4 6,7 0 3, and West German patent 3 9 1 1 6 2 0 A 1. To further improve the viewing angle of the OCB mode LCD, some people use ordinary Optically compensated films for use in LCDs, such as U.S. Patent Nos. 5,805,253, 6,064,457, and U.S. Patent No. 96/37,804, the disclosure of which is incorporated herein by reference. Optical compensation film. In these documents, a CB mode liquid crystal display of such a film is also disclosed. Because of the compensation film having an anisotropic layer of a dish liquid crystal, the published LCD has a wider viewing angle. In the 42nd Japan Open Physics Association (Spring) Conference (29a-SZC-20, 1995), the HAN (Mixed Alignment-Nematic) mode of liquid crystal cells was published, so the foregoing concept has been applied to reflective displays. In the liquid crystal sheet, the rod above the curved alignment mode liquid crystal cell The liquid crystal molecules are oriented in the mixed alignment direction. The biaxially stretched film is proposed as an optical compensation film for the HAN mode liquid crystal cell. To further improve the viewing angle of the HAN mode LCD, Japanese Patent Application Laid-Open No. 9(1997)-21914 and An optical compensation film having a disc-shaped liquid crystal optical anisotropic layer is disclosed in Japanese Patent No. 3,118,197. In this patent, a HAN mode LCD with a compensation film is also disclosed. 1269893 and a conventional liquid crystal cell (TN mode, STN mode) In comparison, the OCB mode or the HAN mode liquid crystal film has a wider viewing angle and a faster response, and thus has been used for a transmissive display. In addition, it is also desirable to develop a reflective or semi-transmissive display having liquid crystal cells of the C B or Η AN mode. Since the reflective or semi-transmissive display must use a λ/4 plate, it is more complicated and has a lower yield than a transmissive display. E C Β (Electrically Controlled Complex Refractive Index) mode L C D The liquid crystal's birefringence effect displays color, so the brightness and resolution of the image are excellent. Therefore, an LCD widely used for color TFT (thin film transistor) can be referred to Japanese Patent Application Laid-Open No. 7 (1999) - 2 3 0 0 8 7 and published by Toray Research Center in 2001. Japanese "EL, PDP and LCD display". In the liquid crystal cell of OCB, HAN or ECB mode, the position of the polarizing film must be such that the transmission axis of the film and the liquid crystal wiping orientation clip are at an angle of 20 ° to 70 °. The polarizing plate usually comprises a polarizing film (having a polarizing ability) and a protective film which has an adhesive layer on a film or all of the film surface layer. The polarizing film material is mainly polyvinyl alcohol (hereinafter abbreviated as PVA). For example, after the PVA film is uniaxially stretched, it is colored with iodine or a two-color dye to obtain a polarizing film. Or after coloring, the film is stretched and then crosslinked with boride. The protective film mainly uses a cellulose triacetate film because of its high light transmittance and low complex refractive index. The P V A film is usually uniaxially stretched in the longitudinal direction, so that the absorption axis of the polarizing film (plate) is almost parallel to the longitudinal direction. Thus, when applied to the L C D of the OCB, Η AN or E C B mode, the rolled polarizer must be stamped at an angle of 20 to 70 ° with the longitudinal diagonal clamp. Due to this oblique stamping, the entire plate made of 1269893 can be used without the actual edge of the polarizing plate being used. Especially when manufacturing large-sized polarizers, the yield is low. In addition, since it is difficult to reuse the remaining polarizing plate (there are many punching holes on it), there is a large amount of waste. In order to solve the aforementioned problems, there have been some proposed methods including moving the film in a direction in which the polymer is oriented at a desired angle. The Japanese Patent Application Publication No. 2 0 0 〇 - 9 9 1 2 publishes an orientation axis that is inclined in a uniaxial extension direction. In this method, the plastic film is extended in the transverse or longitudinal direction, and each side of the film extends in the longitudinal or transverse direction at different speeds. However, if the method is carried out using a tenter, each side of the film must be moved at a different rate. Therefore, the film obtained by Lu is often subjected to embossing (because of unevenness due to uneven tension), unevenness of the crepe and local thickness, and thus it is difficult to obtain the obtained inclination angle (for example, the film for the polarizing plate is required to be 45°). On the other hand, if the difference in the moving speed between the two sides is too small, the stretching step must be lengthened, and the cost is greatly increased. ^^---------- In the method disclosed in Japanese Patent Application Laid-Open No. 3 (1 9 9 1 ) 1 8 2 7 0 1 , the two sides of the continuous film are made up of many pairs of jigs Clipped. Extending with the clamp, the direction of extension and the direction of movement are angled, so that the extension axis of the resulting film and the direction of movement are sandwiched at an angle θ. However, even with this method, the moving speed of the film on both sides is different, and the resulting film tends to have a rug and a crepe. To solve this problem, the process must be significantly extended. If so, it will also increase costs. In the method disclosed in Japanese Laid-Open Patent Publication No. 2 (1901) - 1 1 3 9 2 0, the film is fed into a chuck arranged in two rows. The collet moves along the tenter track so that each collet moves a different distance. When the film is moved, its two sides are clamped by the collet, and the direction in which the chuck is stretched and the longitudinal direction of the movement are inclined. However, the film is stretched by this method, and there are often ribs and crepe lines, so it is unfavorable. (3) SUMMARY OF THE INVENTION The object of the present invention is to improve a polarizing plate which can be used for a semi-transmissive type cb (mode LCD, or a reflective type HAN mode LCD, and provides a polarizing plate which simplifies the process, and improves the semi-transmissive type). Or the yield of the reflective type L e D. Another object of the present invention is to provide a method for obliquely extending a polymer film, thereby improving the yield of the polarizing plate. Another object of the present invention is to provide a tilted extension obtained by the method. A polarizing plate of a polymer film. The target polarizing plate is high in performance and low in cost. Another object of the present invention is to provide a 〇CB, Η AN or ECB mode LCD having the aforementioned polarizing plate. The present invention provides the following polarizing plate (1) to (4), and the following LCDs (5) to (8). (1) A polarizing plate with linear polarization, which has a linear polarizing film with a longitudinal and absorption axis and a late longitudinal and late phase axis a phase in which the longitudinal direction of the linear polarizing film is substantially parallel to the longitudinal direction of the retarder and the absorption axis of the linear polarizing film is substantially parallel to the longitudinal direction of the linear polarizing film and the slow phase axis of the retarder is substantially non-parallel Vertical to the longitudinal phase (2) A polarizing plate as defined in (1), wherein the retarder is a λ/4 plate, and the slow phase axis of the retarder is substantially at an angle of 45° to the longitudinal direction of the retarder. (3) The polarizing plate of the linear polarizing film includes a linear polarizing film having a longitudinal direction and an absorption axis, and a phase retarder having a longitudinal and a slow phase axis, wherein the longitudinal direction of the linear polarizing film is substantially parallel to the longitudinal direction of the retarder and the linear polarizing film The absorption axis is substantially non-parallel or perpendicular to the longitudinal direction of the linear polarizing film, and the slow phase axis of the retarder is substantially parallel to the longitudinal direction of the retarder. -10- 1269893 (4) Polarizing plate as defined in (3) Wherein the retarder is a λ/4 plate' and the absorption axis of the polarizing film is substantially sandwiched by the longitudinal direction of the linear polarizing film by 4 5 °: (5) an LCD having a liquid crystal cell and at least one polarizing plate, the liquid crystal cell containing The plates each have a transparent electrode having an orientation layer on the surface thereof, and the curved formulation is matched to the nematic liquid crystal to be sealed between the two alignment layers of the substrate. The polarizing plate defined by (1) to (4) is selected. (6) The LCD as defined in (5), wherein the optical compensation film is interposed between the liquid crystal cell plates, and the optical compensation film The optically anisotropic layer comprising a transparent carrier and a fixed dish-shaped liquid crystal, wherein the optical anisotropic layer has a directionality of Re(0.) hysteresis 10 of 10 to 60 nm (35±25 nm) Re (40) °) Hysteresis is 80 to 130 nm (1〇5 ± 25 nm) and Re (-hysteresis is 10 to 60 nm (35 ± 25 nm)).

Re(0.), Re(40.), and Re(-40.) hysteresis represent optically compensated optical anisotropy. It is in the plane containing the film normal and the optical hysteresis minimum hysteresis direction, with the light of 633 nm from the normal direction, and the deviation from the normal line opposite to the direction/line of the minimum hysteresis edge clip 4 〇 And the direction clamp 40 that provides the minimum hysteresis. The direction measured by the direction. (7) The LCD as defined in (6), wherein the transparent carrier of the optical compensation film has a retardation layer of 10 to 70 nm and an Rth retardation of 70 to 400 nm.

Re and Rth hysteresis 値 are defined as follows (I) and (11), respectively (I) Re=(nx-ny)xd (II) Rth={(nx+ny)/2-nx}xd Nx is the refractive index along the slow phase axis in the transparent carrier, linearly dependent on the base or the mixing plate and the deviation, 40. The film of the layer of the film is -11- 1269893 ny is the refractive index of the transparent carrier along the moving axis, nz is the refractive index at the depth of the transparent carrier, and D is the thickness of the transparent carrier (unit is nanometer) . (8) An LCD comprising a polarizing film, which is formed by continuously providing an optical polymer film in a bending path, wherein both sides of the polymer film are sandwiched and extended according to the following conditions: (i) the longitudinal stretching ratio is 1.25 to 1 0, (ii) The lateral extension ratio is 1.1 to 2 0.0, (i Π ) the longitudinal movement rate difference between the two sides of the jig is 1% or less, and (iv) the volatile component content is 5% or more. State, (v) The direction of movement and the direction of substantial extension are at an angle of 20° to 70° at the exit of the process; it is characterized by the LCD operating in OCB, HAN or ECB mode. In the present specification, "substantially parallel", ''substantially perpendicular'' or ''substantially sandwiching an angle of 45°' means a deviation of an angle of 5°. Thus "substantially not parallel or perpendicular" It means that the angle is between 5° and 85° (the angle between the small sides is not more than 90°). According to the invention, the linear polarizing film and the retarder can be laminated by means of a roller to a roller to form a polarizing plate. A polarizing plate for manufacturing an OCB, Η AN or ECB mode LCD, or a roll-shaped polarizing plate, a polarizing film and a retarder (a λ/4 plate in the case of a roll-shaped polarizing plate) must be laminated so that the film The absorption axis is not parallel or perpendicular to the slow phase axis of the hysteresis (λ/4 plate). In fact, in order to prepare a roll-shaped polarizing plate, the absorption axis of the polarizing film must be clamped to the retardation axis of the λ/4 plate by 45 °. The absorption axis of the linear polarizing film in the form of a film roll obtained by the usual method is parallel or perpendicular to the longitudinal direction. Therefore, in the laminating operation of the roller-to-roller, the absorption axis of the thin -12-1269893 film cannot be parallel or perpendicular to the slow phase axis of the retarder. Thus, the conventional process ' is to laminate a sheet punched out of a linear polarizing film and a sheet which is punched out by a retarder. According to the present invention, a retardation film having non-parallel or perpendicular to the longitudinal direction or a linear polarizing film having an absorption axis which is not parallel or perpendicular to the longitudinal direction can be formed into a film roll form. Thus, the present invention can roll-to-roll laminate polarizing film and retarder such that the absorption axis of the film is not parallel or perpendicular to the slow phase axis of the retarder. Thus, a polarizing plate whose absorption axis is not parallel or perpendicular to the slow phase axis (e.g., a circular polarizing plate) can be legally produced by using a roll-to-roll layer. Due to the simple manufacturing process and low-cost and high-speed production, the roll-to-roll method is advantageous in comparison with the conventional diaphragm and retarder layer. The curved alignment mode or Η AN mode L C D is a reflective LCD with wide viewing angle and fast response. Therefore, if the necessary roll-shaped polarizing plate in the display can be produced in a simple manner with low cost and high yield, the display of the curved alignment mode or the HAN mode can be more widely used. (Liquid Cell) The liquid crystal cell of the curved alignment mode or the HAN mode is described in Japanese Patent No. 3,1,8,1,7,7. A liquid crystal cell having a bendable alignment liquid crystal (i.e., a curved alignment liquid crystal cell) is a symmetrical liquid crystal cell, and a liquid crystal display having the liquid crystal cell has a substantially wide viewing angle. A reflective liquid crystal display comprising a liquid crystal that can be aligned with HAN has a substantially wide viewing angle. The liquid crystal cell usually contains a pair of substrates with nematic liquid crystals therebetween. There is a transparent electrode on the surface of each substrate. In the curved alignment liquid crystal cell, a nematic liquid crystal in which a voltage is applied in a curved alignment is employed. Liquid for bending alignment liquid crystal cells • 13- 1269893 crystals usually have positive dielectric anisotropy. The orientation vector of the nematic liquid crystal changes its direction depending on the voltage applied to the liquid crystal cell. If the voltage changes, the angle between the orientation vector and the substrate changes. Usually the voltage rises, the angle is opened, and the birefringence drops to show the image. In the present specification, "bending alignment liquid crystal means that the orientation vector (indicating axis or optical axis) of the liquid crystal molecules in the liquid crystal layer is symmetrical (linearly symmetric) to the center line of the layer, and at the same time at least close to the substrate The term "curved portion. π curved portion" refers to a line formed by an indicated shaft near the bend of the substrate. In other words, if a voltage is applied to the liquid crystal cell in the curved alignment mode, the indication axis of the liquid crystal molecules close to the lower substrate will be almost parallel to the substrate. When the distance from the lower substrate is increased, the angle between the axis and the substrate is increased, and the axis of the molecule located in the central region (the distance from the lower substrate is almost the same as the distance from the upper substrate) is perpendicular or nearly perpendicular to the substrate. Then, the distance from the lower substrate is increased, and the angle between the indicating shaft and the substrate becomes large. Finally, the indicated axis of the molecules near the upper substrate is almost parallel to the substrate. The indicator axis in the central zone is the twisted alignment. In addition, the indicator axis that approaches or contacts the upper or lower substrate is tilted along the surface of the substrate (i.e., has an angle of inclination). In the liquid crystal cell of the curved alignment, the product of the refractive refractory direction (Δηη) of the liquid crystal and the thickness (d) of the liquid crystal layer (Δηχ(1) is preferably 100 to 2,0 0 nm, and particularly preferably 150 to 1,700 nm, preferably 500 to 1,500 nm. If the product is within the above range, both high brightness and wide viewing angle can be achieved. In the LCD, the ΗΑΝ mode is well known. In the ΗΑΝ aligning unit cell The lower substrate is placed on the center line corresponding to the curved alignment unit cell. The alignment layer of the lower substrate allows the nematic liquid crystal to be aligned along the homeostatic direction. When the voltage is applied to the unit cell, -14- 4 1269893 is used for the HAN alignment unit cell. The nematic liquid crystal is oriented according to the mixed alignment. In the HAN alignment unit cell, it is preferred that the liquid crystal molecules on one substrate are substantially vertically aligned, and the other substrate has a pretilt angle of 0 to 45°. The product of the refracting anisotropy (Δη) and the thickness (d) of the liquid crystal layer (Δηχά) is preferably 100 to 1, 〇〇〇 nanometer, and more preferably 300 to 800 nm. The molecules of the vertical alignment substrate may be on the reflection plate. Side or on the side of the transparent electrode. Curved alignment or ΗΑΝ alignment of the liquid crystal cells with self-optical The indicator shaft is compensated. However, even if the display contains self-compensating unit cells, the viewing angle (especially upwards and downwards) is increased, and the transmittance of the black area of the displayed image is increased to reduce the contrast. If the optical compensation film of the present invention is used. Attached to the unit cell, it can be improved without reducing the forward-looking function, which can improve the image contrast of the skew viewing. (Linear polarizing film) To prepare a roll-shaped polarizing plate, the linear polarizing film is laminated on the λ/4 plate. Therefore, the absorption axis of the film and the slow phase axis of the plate are clamped by 45°. In order to prepare the roll polarizing plate by roller-to-roller layer method, it is preferable to use a rectangular linear shape of the absorption axis and the longitudinal clamp 45°. The polarizing film and the slow phase axis are parallel to the longitudinal rectangular phase retarder. Or the rectangular polarizing film with the absorption axis parallel to the longitudinal direction and the rectangular phase retarder with the slow phase axis and the longitudinal clamping of 45 ° are used. Some methods have been proposed. The orientation axis of the polymer and the moving direction of the film are prepared at the desired angle. Japanese Patent No. 2000-99 1 2 discloses a method of forming an angle between the orientation axis and the uniaxial extension direction. In this method, the plastic film is laterally oriented. Or longitudinal extension, thin Each side of the film is stretched at a different rate in the longitudinal direction or the transverse direction, respectively. In the method 1268893 published in Japanese Patent Application Laid-Open No. Hei. The operation area in which the multi-clamp is clamped. The film which is clamped by the jig is extended in the direction of the θ angle of the moving direction, and the film which extends the axis and the moving direction is obtained. Japanese Patent Application Publication No. 20 990)- In the method disclosed in No. 3,920, the film is fed into a jig in two rows. The clamp moves on the tenter track so that each wire clamp can travel a different distance. Under the condition that both sides are clamped by the jig, the moving film 'there is inclined angle in the extending direction and the longitudinal direction of the movement. In addition, the polarizing plate can be wiped and aligned to tilt the moving shaft. Further, the polymer film can be obliquely stretched to form a rectangular film which is rolled into a cylindrical form, which is more excellent for preparing a linear polarizing film. The linear polarizing film material is mainly polyvinyl alcohol (slightly PVA). For example, after uniaxial stretching, the P V A film is colored with iodine or a dichroic dye to obtain a polarizing film. Or after being colored, the film is stretched and crosslinked with boride. A polyolefin film can also be used. For example, after stretching, the polyolefin film is dyed to obtain a polarizing film. A linear polarizing film having an absorption axis which is not parallel or perpendicular to the longitudinal direction can be produced, for example, in the following manner. φ A polymer (usually PVA) film is continuously fed into the extension where both sides of the film are clamped by the clamp. The film is stretched as it moves in the longitudinal direction. The extension extends to the following formula (1): |L2-L1|>0.4W. In the formula (1), L1 is the distance from which the film is sandwiched from the starting position to the releasing position, and L2 is the distance from the other side of the film being clamped to the releasing position, and W is the film thickness after stretching. The width of the upper. During the film stretching, the film is maintained in a state in which the volatile component content is 5% or more. After the extension is completed, the film is shrunk to reduce the volatile component content. Finally, the resulting film was wound on a roll. -16- 1269893 Figures 1 and 2 show plan views of typical examples of the polymer film oblique stretching method. The stretching method comprises: (a) introducing the raw material film in the direction of the arrow (A), (b) extending in the width direction, and (c) feeding the extended film to the next step in the direction indicated by the arrow (b) The following ''extension step') refers to the step of extending from (a) to (〇). The film is continuously introduced in the direction indicated by (A), and is first clamped to the left point B1 by the jig as the upstream side. At this time, the other side is not clamped, so there is no tension in the width direction, that is, the point B 1 is not the starting point of the substantial clamping. The starting point that is substantially clamped according to the present invention refers to the point at which both sides of the film are clamped. The starting point has two pinch points: A 1 and C 1, A 1 is the vertical line of the center line 1 1 (Fig. 1) of the lead-in side, and 2 1 (Fig. 2) and the track 13 of the fixture running (Fig. 1 ) or 23 (Fig. 2) is the intersection of C1. The clamps on both sides move at a constant speed, moving from A1 to A2, A3...An, and C1 to C2, C3, (...! The direction of extension is represented by the connecting line of An and C η, and A η and C η are the clamping points moved by the standard fixture at the same time. According to the method of the present invention, as shown in Figures 1 and 2 It is shown that An gradually lags behind Cn, so the extension axis becomes perpendicular to the direction of movement. According to the essence of the present invention, the release point downstream is the point at which the film is released by the jig CX and AX; and the center line by CX (Fig. 1) 2 or 2 of 2) 2) Plot, and track 14 (Fig. 1) or 24 (Fig. 2) to Ay. The final extension angle of the film is eight" eight percent [ie |1^1-] ^2|, that is, the difference between the left and right jigs of the extension end of the step 1269983 (the substantial release point of the jig), and the distance w between the two points (ie, the distance between c X and Ay) that the jig is substantially released. The inclination angle θ between the extension direction and the movement direction is defined by the following formula: tan0 = W/( Ay-Αχ) 良 tan tan0 = W/|L 1 -L2| Although the films in Figures 1 and 2 The upper edge is clamped to point 1 8 (Fig. 1) or 2 8 (Fig. 2) (i.e., after point Ay), while the other side is already released. Then points 18 and 28 are not pulled apart again. Therefore, it is not the essence of the present invention. As mentioned above, the substantial starting pinch point of the left and right sides is not a separate pinch point of the jig. The right definition is more strictly described, and the essence of the present invention is The pinch point is the point at which the two sides begin to clamp at the same time, and the continuous film and the center line of the film are at right angles (ie, A1 and C1). Similarly, the two substantial release points refer to the point on the left that has reached the most downstream (Cx), and At the point where the clamp is released, the angle of inclination of the Cx point to the vertical line clamp θ drawn by the center line of the film and the intersection point of the right side (AX). As used herein, the term 'about a right angle' means connecting the left and right physical starting clips. The angle between the line of the point and the center line of the film is 90 ± 0.5. With the extension machine of the tenter system of the present invention, the distance between the left and right fixtures is different, 'between the grip of the clamp and the actual starting grip. Or the large gap between the fixture release point and the cross-release point is sometimes due to machine limitations (such as the length of the track). However, the object of the present invention can be attained as long as the substantial starting pinch point and the substantial release point satisfy the equation (1). The inclination angle of the orientation axis of the obtained stretched film can be controlled, that is, the distance difference IL1-L2I determined by the left and right jigs and the width of the step (C) outlet w1269893. In polarizing plates and birefringent films, it is desirable to have a film oriented at a longitudinal angle of 45 °. In this case, in order to make the orientation angle close to 45 °, it is preferable to satisfy the following equation (2): 0.9 W < | L1 - L2 | < 1.1 W Equation (2) is particularly preferably in accordance with the following equation (3 ): 0.97W<|L1-L2|<1.03W Formula (3) In the specific example of the extended structure shown in Figs. 1 to 6, the obliquely extending polymer film conforms to the equation (1), and the installation cost is considered. The yield can be arbitrarily designed. The angle in which the film is introduced into the direction of the stretching step (A) and the film is moved to the direction of the next step (B) may be any number. In the case of minimization of the full area of the device including the steps before and after the extension, the smaller the angle, the better. This angle is preferably within 3 °, and particularly preferably within 0.5 °. This configuration can be achieved as shown in Figures 1 and 4. In the method in which the film is moved substantially as described above, it is not easy to obtain a 45 ° pointing angle (for the vertical axis) of the polarizing plate and the birefringent film if only the distance of the jig is enlarged. Therefore, after the film is contracted as shown in Fig. 1, the film|L1-L2| can be improved. Further, in order to minimize the cost of installing the extension unit, it is preferable to make the jig trajectory bending cycle less and the bending angle to be small. In this regard, the direction in which the film moves is preferably curved on both sides of the film so that the film moving direction at the exits of the film and the substantial extension direction of the film are sandwiched by an angle of 40 to 50°, as in the second and third Figure 5 shows. -19- 1269893 The stretching device for sandwiching both sides of the film according to the present invention is preferably a tenter as shown in any one of Figs. 1 to 5. In addition to the conventional two-degree space tenter, the jig trajectory shown in Fig. 6 can be used to spiral the difference between the two sides. In a tenter type stretcher, in many cases, the chain of the mounting jig moves along the track. The laterally uneven stretching method of the present invention causes variations in the end of the track at the entrance and exit of the step, and as shown in Figs. 1 and 2, the left and right sides of the film cannot be pinched and released at the same time. In this case, the substantial running distance is not the distance between the simple pinch point and the release point, but the length of the portion where the two sides of the film are clamped to operate. If the left and right sides of the film move at different rates at the exit of the stretching step, the film at the exit of the stretching step may wrinkle and have a local thickness unevenness. Therefore, the left and right film holder movement rates must be substantially the same. The difference in the moving rate is preferably 1% or less, and more preferably less than 〇. 5 %, preferably less than 0. 〇 5 %. The term 'rate' as used herein refers to the distance that the left and right clamps move per minute. In the general tenter type extension machine, etc., the difference in speed is calculated by the time difference in seconds or less, depending on the period of the sprocket to drive the chain and the frequency of the drive motor, and there are often several The unevenness of the percentage points is generated. However, this rate unevenness has a limited impact on the rate described in the present invention. Unevenness and wrinkles of the film are caused by the difference in the operating speeds of the left and right jigs. In order to solve this problem, the present invention comprises maintaining the support quality of the film, stretching the film in the presence of a volatile component content of 5% or more, and then reducing the volatile component when shrinking the film. The phrase "maintaining the support quality of a polymer film" means that the film is gripped on both sides before it can be detrimental to its properties. -20- 4 1269893 One 匕 延伸 延伸 延伸 匕 匕 匕 匕 延伸 延伸 延伸 延伸 匕 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性 挥发性In the case of 〇 or above, the effect of the present invention is at the feE, and the volatile component may be less than 5% in one of J, T, and JL. The method for making the volatility into u & +db is: casting the film so that, for example, water or an anhydrous solvent, the volatile enthalpy of the #$ is contained therein; and ^ k ^ before the extension Into a volatile substance such as water or an anhydrous solvent, or coated with a volatile substance << a sprinkle, when extended, coated or sprayed on the film with a volatile substance such as water or an anhydrous solvent. If you add 7^^, the hydrophilic polymer film of J. E. can absorb the high temperature and high humidity. The water is 7k仏^ water, so you can do it in the high humidity atmosphere. extend. In addition to these methods, any other method which can make the polymer film a 5 /〇 or more volatile components can be used. The preferred volatile component depends on the type of polymeric film. As long as the support of the polymer film can be maintained, the maximum content of volatile components is not limited. In the case of polyvinyl alcohol, the volatile component content is preferably from 1% to 1% by weight, and the deuterated cellulose is from 10% to 200%. The stretched film can be subjected to shrinkage treatment during and after stretching. Shrinkage of the film involves elevated temperatures to remove volatile components. However, any method can be used as long as the film can be shrunk. The content of the volatile component after drying is preferably 3% or less, particularly preferably 2% or less, more preferably 1.5% or less. In the present invention, the track that limits the trajectory of the jig tends to have a large curved curve. In order to prevent the film holders from interfering with each other due to sharp turns or local application concentration, it is preferred that the trajectory of the jig is changed along an arc. The polymer film to be extended in the present invention is not particularly limited. A suitable polymer film of -21 to 1269893 which is soluble in a volatile solvent can be used. The polymer can be p v A, polycarbonate, deuterated cellulose, and coal mill. The thickness of the film before stretching is not particularly limited, and in terms of the stability and uniformity of stretching of the film, the thickness is preferably from 丨micrometer to 丨mm, particularly preferably from 20 μm to 200 μm. Although the stretch film of the present invention has various applications, it is particularly suitable for a polarizing film or a birefringent film because of its orientation axis and longitudinal tilt angle; specifically, when used as a polarizing plate for an LCD, the tilt angle is 4 〇 to 5 Hey. , especially good for 46. . When the present invention is used to produce a polarizing film, a preferred polymer is PVA. P V A is usually obtained by saponification of polyvinyl acetate. However, it may contain components copolymerizable with vinyl acetate, such as unsaturated carboxylic acids, unsaturated acid extensions, anomalies and ethylene ethers. The PVA can also be changed by a acetophenone group, a sulfonic acid group, an iron group and/or an oxyalkylene group. Although the degree of roadway of P V A is not particularly limited, in terms of solubility, it is preferably 80 to 1 〇 〇 mol %, particularly preferably 90 to 1 〇 〇 mol %. Further, although the degree of polymerization of the PVA is not particularly limited, it is preferably from 1 Torr to 1 Torr, and particularly preferably from 1,5 Torr to 5,000. The PVA is dyed to obtain a polarizing film, and the dyeing method is adsorption in a gas phase or a liquid phase. If iodine is used for liquid phase adsorption, the P V A film is immersed in an aqueous solution of iodine-potassium iodide. The amount of iodine is preferably from 1 to 20 g/liter, and the amount of potassium iodide is preferably from 1 to 1 g/l, and the weight of iodine to potassium iodide is preferably from 1 to 1 〇. The dyeing time is preferably from 3 to 5, 〇 〇 〇 second, and the solution temperature is preferably from 5 to 5 〇 〇c. There are many types of dyeing methods, not only impregnation, but also coating or spraying with iodine or a dye solution. The dyeing step can be before or after the extension step of the invention. However, it is particularly preferred that the film is dyed in the liquid phase before the film -22- 1269893 is extended, so that the film is easily expanded. It is also preferred to use a dichroic dye and iodine. Specific examples of the dichroic dye include an azo dye, an anthraquinone dye, a pyrazolone dye, a triphenylmethane dye, a quinoline dye, an oxazine dye, a triazine dye, and an anthraquinone dye. The dye is preferably water soluble, but is not limited to water solubility. Further, it is preferred that the dichromatic molecules have a sulfonic acid group, an amine group and a hydroxyl group. Specific examples of dichroic dye molecules are CI (dye index) direct yellow 12, CI · direct orange 39, CI direct orange 7 2, C · I · direct red 3 9 , C. I · direct red 7 9 , C . I · Direct red 8 1 , C. I. Direct red 8 3, C · I · Direct red 8 9 , C · I · Direct purple 4 8 , C · I · Direct blue 6 7 , C . I. Direct blue 9 0 , C · I · Direct Green 5 9 and C · I · Direct Red 3 7 and 曰 Patent Application Publication 1 (1 9 8 9) - 1 6 1 2 02, 1 (1 9 8 9) - 1 7 Dyes as described in No. 2906, 1 (1989)-172907, 1 (1989)-183602, 1 (1989)-248105, 1 (1989)-265205, and 7 (1995)-261024 The dichromatic molecule can be in the form of a free acid, an alkali metal salt, an ammonium salt or an amine salt. A polarizing plate having various hues may be obtained by combining two or more such dichroic molecules. A polarizing plate containing a black dye when the polarizing axes are perpendicularly intersected, or a polarizing plate containing a plurality of dichroic molecules, and which exhibits black color, are excellent in single plate transmission and polarization ratio. When a polarizing film is produced by extending PVA, it is preferred to use a crosslinking agent of PVA. Specifically, when the oblique stretching of the present invention is employed, the insufficiently hardened PVA at the exit of the stretching step sometimes deviates from the orientation axis of the pVA film due to the tension in the step. Thus, before or during the extension, it is preferred to immerse or coat the film with a crosslinking agent solution to allow the crosslinking agent to be contained in the film. Suitable cross-linking agents are described in -23- 1269 893. U.S. Patent No. 2 3 2 8 9 7 is preferably a boric acid compound. The extension method of the present invention is also preferably used to produce a so-called polyethylene conjugated conjugated double bond in which the poly smoky structure is derived from dehydration of pva or dechlorination of polyvinyl chloride to cause polarizing properties. The linear polarizing film may be a cellulose triacetate film. ^ Cellulose acetate is well-transparent; 7t rate and low birefringence can be used as optical compensation film, late phase plate or protective film of normal polarizer. The polarizing film produced by the present invention has a protective film polarizing plate bonded to one or both sides thereof. The type of the protective film is not particularly limited. The film material useful in the present invention comprises cellulose esters such as cellulose acetate, cellulose acetate butyrate, polycarbonate, polyolefin, polystyrene and polyester. The necessary properties of the protective film such as high light transmission, proper moisture permeability, low light transmittance and appropriate stiffness. From this point of view, it is preferred that cellulose is cellulose, and cellulose acetate is used. The nature of the protective film depends on the desired application. The film for the transmissive LCD preferably has the following properties: in terms of handling and durability, the thickness is from 5 to 500 μm, particularly preferably from 20 to 200 μm. It is 20 to micrometers; the hysteresis of 632.8 nm is preferably 0 to 150 nm, and it is 20 to 200 nm, preferably 4 to 4 nm. The retardation axis of the protective film is substantially parallel or perpendicular to the absorption axis of the polarizing plate, so that the linear film is not circularly polarized. However, if the protective film is designed to be a biasing element (such as a retarder), the retardation axis of the protective film can be absorbed at any angle by the polarizing film.

The transmittance of visible light is preferably 60% or more, particularly preferably 90% or A is biased, and the light is obtained. (The 1/4 is the best protection for the propylene plate. The best protection is preferably 100. The preferred polarizing shaft clamp (the upper 〇1269893 after shrinking the film at 90 ° C for 120 hours, its shrinkage in one degree space is preferably 0.3 to 0.01%, especially preferably 0.15 to 0.01 The tensile strength measured by the tensile test is preferably from 50 to 1,0 0 0 X 1 0 6 bar, particularly preferably from 100 to 30,000 x lO6 bar. The moisture permeability is preferably from 100 to 800 g / m 2 · day, particularly preferably 300 to 600 g / m 2 · day. However, the present invention is not limited to the foregoing range and preferred. The cellulose deuterated cellulose which is preferably used for the protective film will be described in detail below. In the preferred deuterated cellulose, the degree of substitution of the hydroxyl group in the cellulose can satisfy the following formulae (I) to (IV): Formula (I) 2.6 < Α + Β <3 .0 Formula (II) 2.0 < Α <;3 . 0 . Formula (III) 0SBS0 · 8 Formula (IV) 1 ·9<Α-Β In the formula, the degree of substitution of the hydroxyl group in the cellulose in the oxime group, and the substitution of the thiol group in the B series with C 3 _ 5 Cellulose usually has three hydroxyl groups in one glucose unit, so the aforementioned The degree of substitution is based on 3.0. That is, the maximum degree of substitution is 3.0. In cellulose triacetate, the degree of substitution is usually 2.6 to 3.0 (that is, the most unsubstituted hydroxyl group is 0.4) and B is 0. The deuterated cellulose as the protective film of the polarizing plate is preferably cellulose triacetate in which all of the mercapto groups are ethyl hydrazine; or acetamidine having 2 or 0 or more, 〇. 8 or more (considering the film) The nature, especially preferably 醯·3 or below), and the unsubstituted hydroxy group of 4 or less. To determine the degree of substitution, acetic acid and substituted fibers are measured according to American Standard Test Method ASTM D - 8 1 7 - 9 1 C 3 _ 5 free acid amount of hydroxy group in the prime. C3_5 fluorenyl group other than acetamidine is, for example, propylene (C2H5CO-), butyl hydrazine (positive -25- 1269893, iso- and pentacene (positive _, iso-, _, 3 L4H9CO-) 〇 In terms of the mechanical strength and solubility of the obtained film, among them, it is preferable that the 丨 椅 · 取代 取代 取代 取代 取代 取代 取代 醯 醯 醯 醯 醯 醯 醯 醯 醯 醯 醯 醯 醯 醯 醯 醯The mechanical strength and heat resistance and humidity of the film are poor. If the C3_5 醯 base degree sound X direction, the cellulose can be improved in organic solvent. Solubility. The degree of substitution is further described in the range of _ cellulose has better properties. The degree of polymerization (viscosity average) of _ _ _ 素 is preferably 2 0 0 to 7QQ, $ 2 50 to 5 50 To determine the average degree of polymerization of the viscosity, the viscosity was determined using "Osto Whirl* viscosity 10" (〇S twa 1 d V isc 〇meter). The specific viscosity [η] of the viscous w is calculated according to the following formula: DP ·· DP = N]/Km where Km is a constant of 6χ1〇-4. The raw material cellulose for preparing deuterated cellulose is obtained from cotton or wood paper. Raw pulp can also be used. The @1 cellulose protective film is usually prepared by a solution casting method, which comprises dissolving deuterated cellulose and an additive in a solvent to obtain a viscous solution (so-called ''Dopp's liquid" (d0pe)), casting the solution The film is formed by evaporating and melting in a continuous carrier such as a drum or a belt. The solid content in the thick liquid is preferably from 1 〇 to 4 〇 by weight S % ° The surface of the drum belt is preferably polished to a mirror surface. Each key and drying of the solvent casting method is described in U.S. Patents 2,3 3 6,3 1 0, 2,3 6,7 0 3, 2,492,078, 2,492,977, 2,492,998, 2,607,704, 2,7 3 9,0 6 9 , 2,7 3 9,〇7 nickname, British Patent 6 4 0,7 3 1 , 7 3 6,8 9 2, Japanese Patent 45 (1970)-4554, 49 ( 1974) No. 5,614, Japanese Patent Application Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Two or more deuterated celluloses may be co-cast into two or more layers. For example, 'two or more outlets along the direction of movement of the carrier can respectively cast a film layer'. See Japanese Patent Application Laid-Open No. 61 (1986) No. 158414, No. 1 (1989)-1 2 2 4 1 9 and 1 (丨) 9 9 9 ) _丨9 8 2 8 5. Or the deuterated cellulose solution can be cast into a film from two outlets, see Japanese Patent No. 60 (i 9 8 5 ) - 2 7 5 6 2, 61 (1986) - 947245, 61 (1986) - 104813, 61 (1986)-158413 and 6 (1 9 9 4 ) - 1 3 4 9 3 3. In addition, the high-viscosity deuterated cellulose solution stream can be entrapped by a low-viscosity solution to form a laminar flow, and the high- and low-viscosity solutions in the laminar flow can be simultaneously extruded into a film, see Japanese Patent Application Laid-Open No. 56 ( 1981) - 162617. Solvents which can dissolve deuterated cellulose are, for example, hydrocarbons (such as benzene, toluene), halogenated hydrocarbons (such as dichloromethane, chlorobenzene), alcohols (such as methanol, ethanol, diethylene glycol), ketones (such as acetone), esters ( Such as ethyl acetate, propyl acetate) and ether (such as tetrahydrofuran, methyl cellosolve). Preferred is C! _7 halogenated hydrocarbon, preferably dichloromethane. The solvent is preferably a mixed solvent of dichloromethane and one or more C i _ 5 alcohols in terms of solubility, carrier peelability, and mechanical and optical properties of the formed film. The alcohol is preferably used in an amount of 2 to 25 % by weight, particularly preferably 5 to 20 % by weight based on the total of the solvent. Alcohols such as methanol, ethanol, n-propanol, isopropanol and n-butanol. It is preferred to use methanol, ethanol, n-propanol and a mixture thereof. In addition to deuterated cellulose, Dopp (dope) can contain additives such as plasticizers, UV absorbers, inorganic fine particles, alkaline earth metals (such as calcium and magnesium) as thermal stabilizers. Salt, antistatic agent, flame retardant, slip agent, oil, mold release agent and hydrolysis inhibitor of cellulose. -27- 1269893 Plasticizers are phosphates and carboxylates. The phosphate ester includes, for example, triphenyl phosphate (TPP), tricresyl phosphate (TCP), toluene diphenyl phosphate, octyl diphenyl phosphate, diphenyl biphenyl phosphate, trioctyl phosphate, and tributyl phosphate. Typical examples of carboxylic acid esters are phthalic acid esters and citric acid esters. Phthalate esters include, for example, dimethyl decanoate (DMP), diethyl decanoate (DEP), dibutyl phthalate (DBP), dioctyl phthalate, diphenyl phthalate (DPP), and citric acid Ethylhexyl ester (DEHP). The citrate includes, for example, o-ethyl citrate triacetate (OACTE) and o-butyl citrate (OACTB), acetaminoethyl citrate, and butyl citrate. Other carboxylic acid esters such as butyl oleate, methyl decyl phthalate, dibutyl sebacate and various trimellitic acid esters such as trimethyl trimellitate may also be used. The glycol esters are, for example, triacetin, tributyl butyl, butylglycol butyl phthalate, ethyl glycol ethyl phthalate, ethyl glycol methyl phthalate, and butyl glycol butyl. Phthalate ester. Preferably, triphenyl ortho-diphenyl phosphate, biphenyl diphenyl phosphate, tricresyl phosphate, toluene diphenyl phosphate, tributyl phosphate, dimethyl phosphate, diethyl decanoate, dibutyl phthalate, Dioctyl phthalate, diethylhexyl phthalate, triacetin, ethyl glycol ethyl phthalate and trimethyl trimellitate. Particularly preferred are triphenyl phosphate, biphenyl diphenyl phosphate, diethyl decanoate, ethyl glyceryl ethyl phthalate and trimethyl trimellitate. They can be used singly or in combination. The amount of the plasticizer is preferably from 5 to 30% by weight, particularly preferably from 8 to 16% by weight, based on the deuterated cellulose. In the preparation of the dosing solution, it may be added together with the deuterated cellulose and the solvent, or before the preparation of the dope. UV absorbers may be used depending on the target. The ultraviolet absorber comprises a salicylate-based absorbent, a benzoquinone-based absorbent, a benzotriazole-based absorbent, and a benzoic acid -28-i 1269893 ester. Preferably, the absorbent is an oxime oxybenzene, 2, 2 -Hydroxy-4propoxyphenyl-5, 丨' 2 - (2 tert-butyl oxazole, water ester and water benzene, 2, toluene)-2-(2'-fute good charge, 0.1 to 0.1% The prepared combination device is an inorganic calcium carbonate, a preferred collector, a cyanoacrylate acid ester absorbent, and a nickel mixed salt absorbent. The present invention is an absorbent sheet! I, a triazole absorbent and water. Salicyl esters. Benzoquinone benzene absorbents such as 帛2,4_dibenzoquinone, 2^benzene benzene, 2,-methoxybenzene benzene, 2,2_dimethoxy; brew 21- Bis-...-methoxybenzoic acid benzene, 2_ _4_n-octyloxybenzoic acid benzene, -12-yard oxybenzoquinone benzene, and 2_ via _4_(2_经_3 cognac Benzene. The benzotriazine-based absorbent is, for example, 2-(2, hydroxy.3,·toluene)-5-chlorobenzotriazole 2-(2, —-匕5-di-dibutyl)benzene. And triazole via ·3,,5,-di-p-triphenylbenzene)benzotriazine, ^diphenyl)-5-chlorobenzotriazole and 2_(2,_hydroxy-5,_third octene benzene Benzotriazole A vinegar-based absorbers such as phenyl salicylate vinegar, of salicylic acid * 'of the two salicylic acid - ester third butylbenzene. Among them, 2 is excellent - & 4 - methoxybenzoquinone 2'-bishydroxy-4,4, methoxybenzoquinone, 2, 3, dibutyl _5, - chlorobenzo-3 Butyl benzene) benzopyrene, I · 3 ', 5, bis 3 butyl benzene) · 5-chlorobenzotriazole. Above the UV ray. UV absorption $ 5 % ' is especially good for the medium' or is added by using, for example, static mixing

In order to absorb two kinds of light of different wavelengths or to make the polarizing plate shield the ultraviolet light in a wide wavelength range, it is preferably 〇 3 i 3 % by weight of the cellulose. The absorbent can be added to the solvent and the bismuth fiber blend. Preferably, the ultraviolet absorber solution is mixed into the dope immediately before the film is deposited. Fine particles such as vermiculite, kaolin, talc, diatomaceous earth, quartz powder, barium sulfate, titanium dioxide, and oxidized bromine. Prior to the addition of the dosing solution, the fine particles are dispersed in the binder solution using a high speed mixer, ball mill, honing machine or ultrasonic disperser -29-1269893. The binder is preferably cellulose deuterated. The fine particles are preferably dispersed together with other additives such as ultraviolet absorbers. Any solvent may be used to disperse the fine particles, but is preferably the same solution as the dosing solution (d 〇 P e ). The number average particle size is preferably 〇 · 〇 1 to 1 〇 〇 micron, particularly preferably 〇 1 to 10 μm. The dispersing agent may be added at the stage of dissolving the deuterated cellulose or at other stages, but it is preferably incorporated into the doping liquid by, for example, a static mixer just before the film is to be deposited. The release agent is preferably a surfactant. The surfactant is, for example, a phosphate ester surfactant, a sulfonate surfactant, a carbonate surfactant, a nonionic surfactant, and a cationic surfactant. Other surfactants can also be used. The release agent is described in Japanese Patent Application No. 6 1 (1 9 8 6 ) - 2 4 3 8 3 7 . When a cellulose acetate film is used as the protective film, it is preferred to carry out saponification treatment, corona discharge treatment, flame treatment or glow discharge treatment on the surface to make it hydrophilic, and to enhance the adhesion of the PVA resin. Or the surface is coated with a hydrophilic resin solution in which the solvent is compatible with deuterated acetate. In order to make the surface of the film hydrophilic, it is preferred to use a saponification treatment because it does not impair the flatness and properties of the film. The saponification treatment is, for example, immersing the film in an aqueous solution such as sodium hydroxide. After the treatment, the film was neutralized with a low concentration of acid and washed thoroughly with water. There are various functional layers on the protective film of the polarizing plate. The functional layer is, for example, an optically anisotropic layer that compensates for the viewing angle of the LCD (refer to Japanese Patent Laid-Open Publication No. 4 (1992)-229828, No. 6 (1994)-75115, and No. 8 (1996)-50206, to improve the display, the polymer. Dispersed liquid crystal layer or spiral nematic liquid crystal layer -30- 4 1269893 identifiable anti-glare layer or anti-reflection layer (which can use unidirectional scattering or anisotropic optical interference to separate ps waves to improve the brightness of LCD), A hard coat layer for improving scratch resistance of a polarizing plate, a gas barrier layer for suppressing diffusion of moisture or oxygen, an adhesive layer or an adhesive for improving adhesion of a polarizing film, and a slip layer. The functional layer may be on the side of the polarizing film or on the other side; Depending on the protective film, the functional layer may be laminated on one or both sides. The functional layer is, for example, a λ/4 plate or a λ/2 plate, a light diffusing film, in polarized light. A plastic cell with a conductive layer on the other side of the board, a brightness-increasing film with a different direction of scattering or an opposite direction of optical interference, a reflector or a semi-transmissive reflector. The preferred protective film described above can be used as a polarizing plate. Protective film. In addition, two or more layers can be laminated The same protective film may be laminated on each surface of each polarizing film, or a polarizing film having non-function and properties may be used on both surfaces. In addition, a protective film may be laminated on one surface of the polarizing film, and another layer may be laminated. The surface is coated with a binder to directly laminate the liquid crystal cells; in this case, it is preferred to laminate the release film on the outside of the adhesive layer. The adhesive for laminating the protective film on the polarizing film is not particularly limited. The adhesive includes, for example, a pv lanthanide resin (including a modified PVA having an acetamidine group, a sulfonic acid group, a carboxyl group, and/or an oxyalkylene group) and an aqueous boride solution. Among them, a PVA resin is preferred. An aqueous solution of boride or potassium iodide may be added. The thickness of the adhesive layer after drying is preferably 〇1 to 1 〇micron, particularly preferably 〇5 to 5 μm. Figure 7 is a conventional polarized light obtained by stamping. a film, and Fig. 8 is a polarizing film of the present invention obtained by stamping. As shown in Fig. 7, the polarizing film of the conventional polarizing film-3 1- 1269893) 1 % ' is in the same direction as the longitudinal direction; and the polarizing film of the present invention Then the polarization absorption axis 8 1 (ie, the extension axis) and the longitudinal direction 8 2 clip 4 5. As shown in Figure 8. This angle is equal to the angle between the absorption axis of the polarizing plate laminated in the liquid crystal cell in L C D and the longitudinal or lateral direction of the liquid crystal cell itself, so that it is not necessary to perform diagonal punching in the stamping stage. Further, as shown in Fig. 8, the polarizing film of the present invention is cut in the longitudinal direction, so that it can be cut in the longitudinal direction without being punched. Therefore, the polarizing plate of the present invention has an excellent yield. In the polarizing plate of the present invention, in order to laminate with other elements in the LCD, an adhesive layer can be added. On the adhesive layer, a separation membrane is preferably laminated. Adhesive layer is not only optically transparent, but also has appropriate viscoelastic and adhesive properties. The adhesive layer material is, for example, an acrylic copolymer, an epoxy resin, a polyurethane, a ketene polymer, a polyether, a butyral resin, a polyamide, a polyvinyl alcohol resin, or a synthetic rubber. The material is formed into a layer and cured according to a drying method, a chemical hardening method, a heat curing method, a melting method, and a photo hardening method. The preferred material is an acrylic copolymer which is easily controllable due to its adhesion, and the resulting layer has excellent transparency, weather resistance and durability. In terms of improving the contrast of the LCD, it is preferred that the polarizing plate of the present invention has high light transmittance and high polarizing property. The light transmittance of the 5 5 nm wavelength is preferably 30% or more, and particularly preferably 40% or more. At 55 Å, the degree of polarization is preferably 9 5 · 0 % or more, particularly preferably 9 9.0 % or more, and particularly preferably 9 9 · 9 % or more. The LCD of the present invention preferably contains a liquid crystal cell and a polarizing film (or a pair of polarizing films). In the liquid crystal cell, the liquid crystal is enclosed in a pair of substrates each having an alignment layer. The transmission axis of the polarizing film is preferably from 2 〇 to 7 〇 ° in the longitudinal direction, and particularly preferably from 4 〇 to 5 〇 in the range of -32 to 1269893. , especially good for 44 to 46 °. The longitudinal direction of the film is preferably parallel to the alignment direction to align the liquid crystal. If the LCD comprises a pair of polarizing films, the two absorption axes of the film preferably intersect perpendicularly. (Optical Compensation Film) The optical compensation film is preferably a light-emitting directional layer containing at least one transparent carrier and a disk-shaped liquid crystal in a fixed alignment. The optical anisotropy of the optically anisotropic layer 値Re(〇°), Re(40.), and Re(-40°) are preferably 35 ± 2 nm, respectively, "5:1:25 nm and 35 ± The range of 25 nm. The former Re (〇.), Re (4〇.) and Re (-40°) represent the hysteresis of the optically anisotropic film. The film contains the normal and provides optical anisotropy. In the plane of the smallest direction of the layer, the rays of 633 nm are respectively provided by the normal line, and the normal tendency is to provide the minimum hysteresis 对 to the side offset of 40 °, and the direction of the minimum hysteresis by the normal tendency is 4 0. (Transparent carrier) The transparent carrier of the optical compensation film is preferably a polymer film having a light transmittance of 80% or more. It is preferred that the polymer film has no birefringence even if an external force is applied. The film is, for example, a cellulose-based polymer or a norbornene-based polymer [such as Zeonez] of Nippon Zeon Co., Ltd. of JSR (Japan Synthetic Rubber Co., Ltd.) and methyl polymethyl propyl acrylate. Preferred is a cellulose-based polymer. 'Ultra is a cellulose ester, and preferably a cellulose ester of a lower fatty acid. Here, "lower fatty acid" means fat of C6 or below. . The carbon number is preferably 2 (cellulose acetate), 3 (cellulose propionate) or 4 (cellulose butyrate). Preferred is cellulose acetate, and examples of cellulose acetate include diacetyl cellulose and triethyl cellulose. Mixed fatty acid cellulose esters such as cellulose propionate-33-1269893 cellulose and cellulose acetate butyrate can also be used. In general, the hydroxyl groups at the 2 -, 3 _ and 6 _ positions of the deuterated cellulose are not identically substituted (ie, the degree of substitution at each position is not equal to 1 / 3 of the total substitution p) and 6 - The degree of substitution of the location is usually small. In the cellulose to be used in the present invention, the degree of substitution at the 6-position is preferably more than 2 _ and 3 _ positions. The substitution ratio of the hydroxyl group at the 6-position to the mercapto group is preferably from 30% to 40% of the total degree of substitution, and particularly preferably 31% or more, more preferably 32% or more. Further, the thiol substitution degree at the 6-position is preferably 〇8 8 or more. The 6-position hydroxyl group may be substituted by a non-acetamidine C 3 or higher sulfhydryl group. The sulfhydryl groups of c 3 or more are, for example, propylene, butyl, pentane, benzoquinone and acrylonitrile. The degree of substitution per position can be measured by nuclear magnetic resonance spectroscopy. The deuterated cellulose produced by Japanese Patent Application No. 11 (99 9 9) - 5 8 5 1 can be used in the present invention. (The hysteresis of the polymer film) The hysteresis of the polymer film can be defined by the following formulas (1) and (11): Formula (I) Re = (nx - ny) xd Formula (II) Rth = {(nx + ny )/2-nz}xd In the formula (Ο and (11), 'nx is the refractive index of the film plane along the slow axis (that is, in the direction of the maximum refractive index); ny is in the film plane along the moving axis (also That is, the refractive index along the direction of the minimum refractive index; η Z is the refractive index along the thickness direction of the film; d is the thickness of the film, and the unit is nanometer. In the present invention, !^ and Rth値 are preferably 10 to 7 respectively. 〇Nami' and 7〇 to 400nm. The complex refractive index 値(Δη = ηχ-ηγ) of the polymer film is 〇. 0 0 2 5 to 〇. 〇〇〇8 8, and the transparent carrier is better. The thickness of the fold 1269893 Λ 値 値 is 0.00088 to 0.005. (The angle of the retardation axis in the polymer film) The extension direction of the polymer film is the standard line (〇°), and the slow phase axis in the transparent carrier The angle is the angle between the slow phase axis and the standard line. If the film in the form of a roll extends laterally, the transverse direction is the standard line. If the film extends longitudinally, the longitudinal direction is the standard. The average angle of the slow phase axis is preferably 3 ° or less, particularly preferably 2 ° or less, preferably 1 ° or less. The direction in which the average angle of the slow phase axis is provided is the average direction of the late phase. The angle of the phase axis has a standard deviation, preferably 1.5 ° or less, and particularly preferably 〇 8 ° or less, preferably 〇. 4 ° or less. After a period of induction, the transmission of the optical compensation film Type LCDs often display an image of the leaked light (the so-called ''uneven picture''). This is due to the increased transmission around the screen, especially when displaying black images. In addition, in semi-transmissive In the LCD, the backlight plate generates heat and the heat is dispersed unevenly in the liquid crystal cell. The uneven heat dispersion changes the optical properties of the optical compensation film (hysteresis 迟, the angle of the slow phase axis), thus causing "uneven picture" π. When the temperature rises, the optical compensation film expands or contracts. However, the expansion or contraction is limited because the film is fixed on the liquid crystal cell or the linear polarizing film, and the film is elastically deformed to change the optical properties. The π picture is uneven π, and it is preferable to use a polymer film having high thermal conductivity as an optical compensation film. The polymer having high thermal conductivity includes cellulose acetate [0.22 W/m. ° C], low density polyethylene [ 0.34 W/m. °C], ABS [0.36 W/m·°C] and polycarbonate [〇·1 9 W/m]. Ring olefin-35-1269893 polymer, such as Zeonez8 from NipponZeon [0·20 W/m·.C], Zeonor® [〇.20 W/m·.C] and JSR's Artone 8 [0.20 W/m·. C]. Considering optical and thermal properties, it is preferred to use cellulose acetate having an acetic acid content of 59.0 to 6.1.5%. The term "acetic acid content" means all of the acetic acid possessed per unit weight of cellulose. For the determination of the acetic acid content, refer to the American standard material S method A S T M D - 8 1 7 - 9 1 (the test method of cellulose acetate). The film of the present invention is obtained from a polymer having a viscosity average degree of polymerization (DP) of preferably 250 or more, particularly preferably 290 or more. Further, a preferred polymer has a narrow molecular weight distribution Mw/Mn (Mw and Μη are respectively a weight average molecular weight and a number average molecular weight measured by a colloidal osmosis method). M w / Μ η is preferably from 1.0 to 1.7, more preferably from ι·3 to ι.65, most preferably from 1.4 to 1.6. (Hysterescence Increasing Agent) In order to adjust the hysteresis of the polymer film, an aromatic compound having at least two aromatic rings is used as a retardation rising agent. A preferred hysteresis rising agent is preferably triphenylazine. Examples thereof are described in Japanese Patent Nos. 2000-111,914 and 2000-275,434, and PCT/JP00/02619. Mixed with rain or above aromatic compounds. The aromatic ring may be an aromatic hydrocarbon ring or an aromatic heterocyclic ring. The hysteresis rising agent preferably has a molecular weight of from 3 〇 to 8 〇. If the cellulose acetate film is used as the polymer film, the cellulose acetate per 1 part by weight is preferably used in an amount of from 1 to 2 parts, more preferably from 5 to 15 parts, most preferably 0 · 1 to 1 part of the aromatic compound. (Production of polymer film) A cellulose acetate film which is a preferred polymer film can be produced by the method described in Japanese Patent Application No. Hei. No. 2001-1745, issued on March 15, 2001. Other polymer films (extension of polymer film) can be made by the same method. The resulting polymer film can be extended to control the hysteresis. The extension is preferably from 3 to 100%. The thickness of the polymer film is preferably from 40 to 140 μm, particularly preferably from 70 to 19 μm. The extension condition can be adjusted to reduce the standard deviation of the slow phase axis angle. There are no special restrictions on the extension method. For example, the film can be extended by a tenter. In this case, after the film formation by the solvent coating method, the tenter is immediately extended in the lateral direction, and the film conditions are controlled so that the retardation axis angle has only a small standard deviation. In detail, the film is held close to the glass transition temperature immediately after extension by the tenter, and the tension is maintained to reduce the standard deviation of the slow axis angle. If the film is kept below the temperature at which the glass is transferred, the standard deviation will become large. Or longitudinal extension of the roller-to-roller method and lengthening the distance between the two rollers to reduce the standard deviation. (Surface treatment of polymer film) A polymer film using a transparent protective film which is a polarizing plate is preferably subjected to surface treatment. The surface treatment includes corona discharge treatment, glow discharge treatment, flame treatment, acid or alkali treatment, and ultraviolet (UV) treatment. It is preferably an acid or base treatment (i.e., saponification treatment). (Orientation Layer) The function of the alignment layer is to orient the dish-shaped liquid crystal of the optically anisotropic layer. The preferred alignment layer comprises an organic compound (preferably a polymer layer) of an alignment treatment, an oblique deposition layer of an inorganic compound, and a layer having microchannels. Further, an accumulation film formed of ω _ glyceric acid, bis-trimethyl dimethyl ammonium chloride or methyl stearate L Β technology CLANGmui!-Blodgett technique can be used as the alignment layer. For the preparation of the alignment layer, the polymer film is preferably formulated. A preferred film polymer is polyvinyl alcohol. Particularly preferred is a polyvinyl alcohol having a hydrophobic group. Since the hydrophobic group and the disc-shaped liquid crystal have an affinity, the denatured polyvinyl alcohol to which the hydrophobic group is introduced can uniformly align the disc-shaped liquid crystal molecules. The hydrophobic group can be placed at the end or side chain of the polyvinyl alcohol backbone. The hydrophobic group is preferably a C 6 or higher aliphatic group (especially an alkyl group or an alkenyl group) or an aryl group. If the hydrophobic group is placed at the end of the main chain, it is preferred to have a linking group between the terminal and the hydrophobic group. The linking group includes, for example, -S-, -(^(CN)!^-, -NR2., -CS-, and combinations thereof. In the foregoing group, Ri and R2 are each independently hydrogen-based or Cl_6 alkyl. In the side chain, acetamidine (-CO-CH3) in the vinyl acetate unit of polyvinyl alcohol is replaced by a mercapto group (-CO-R3) having C7 or higher. In the above formula, R3 has C 6 Or an aliphatic group or an aryl group. The denatured polyvinyl alcohol is described in Japanese Patent Application Laid-Open No. 9 (1977-1)-1 5 2 5 9 9. Commercially available denatured polyvinyl alcohol (such as Kuraray) can be used. The company's MP 1 03, MP203, Rl 1 30) saponification degree of the (denatured) polyvinyl alcohol used in the present invention is preferably 8% or more, and the degree of polymerization is preferably 20,000 or more. It is a function of the alignment -3 8- 1269893 by wiping the surface of the film in a certain direction by paper or cloth. It is preferable to wipe the film layer several times with the fiber cloth of the same length and thickness. The dish-shaped liquid crystal in the optical anisotropic layer Once the molecules are aligned, they remain aligned even after the alignment layer is removed. Therefore, although the optical compensation film must be prepared with the alignment layer, the optical compensation of the finished product It is not necessary to include an orientation layer. If there is an alignment layer between the transparent support and the optically anisotropic layer, it is preferred to provide a bottom layer (adhesive layer) between the transparent support and the alignment layer. (Optical anisotropic layer) Shaped liquid crystals are used to prepare optical anisotropy. Disc-shaped liquid crystal molecules usually have optical negative uniaxiality. In the optical compensation film of the present invention, the angle between the dish-shaped plane and the transparent carrier changes with thickness in each liquid crystal molecule (also That is, the molecule is preferably oriented in the mixed alignment. In the optically isotropic layer, none of the directions has a hysteresis of 〇, that is, the layer has no optical axis. To form an optically anisotropic layer, the liquid crystal molecules are more Preferably, the orientation of the alignment layer is maintained and the orientation is maintained. The thickness of the optically isotropic layer is preferably from 0.5 to 100 μm, more preferably from 5 to 30 μm. Disc-shaped liquid crystal molecules are described in various literatures. : C. Destrade et al., "Molecular Crystallization Liquid Crystals", Vol. 71, p. 111, 1981; Japanese Chemical Society, Quarterly Chemistry Review (Japanese), Chapters 5, 10, 2, 1994; B. Kohne A, ngew. C h Soc. C hem . Comm., 1794 pp., 1985; and JL Zhang et al., Journal of the American Chemical Society, Vol. 1 1 6, 2 6 5 5, 1 994. Polymerization of dish-shaped liquid crystal molecules The reaction is described in Japanese Patent Application Laid-Open No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. However, if the polymerizable group is directly bonded to the disk-shaped core, it is difficult to maintain alignment in the polymerization reaction. Therefore, the linker is preferably introduced between the disk-shaped core and the polymerizable group. In order to fix the alignment of the discotic liquid crystal molecules, a photopolymerization initiator is used. The photopolymerization initiator is, for example, an α-carbonyl compound (described in U.S. Patent No. 2,3,6,6,6,1,2,3,6,7,7,0), acrolein (U.S. Patent 2,4 4,8). 8 2 8), (X-hydrocarbon substituted acrolein compound (U.S. Patent 2,7 2 2, 5 1 2), polycyclic guanidine compound (US Patent 2,9 5 1,7 5 8 , 3, 0 4 6,1 2 7), a mixture of triadelimidazole and p-aminophenone (U.S. Patent No. 3,5,4,3,7,7), acridine or phenazine compound, Japanese Patent Application Publication No. 6 0 (1 9 8 5) - 1 0 5 6 6 7 and U.S. Patent 4,2 3 9,8 5 0], and oxadiazole compounds (U.S. Patent 4,221,970). The amount of photopolymerization initiator is preferably The coating solution solid weight is from 0. 0 1 to 20%, particularly preferably from 5 to 5%. The photopolymerization is preferably carried out by ultraviolet light. The irradiation energy is preferably from 20 to 50,000 mJ/ Cm 2 , especially preferably 100 to 800 mJ/cm 2 . A coating can be added to light to accelerate the photopolymerization. The protective film can be applied to the optically anisotropic layer. (Polyphaser) Late The phaser is preferably used as a λ/4 plate The λ / 4 plate must have a hysteresis 测定 (measured at 5 9 〇 nanometers) (R e 5 9 0 ) of 1 2 0 to 1 60 nm, which may include a single film or a lamination. This plate is preferably available. λ/4 of a wide wavelength range, preferably a single film in the form of a film roll. -40- 1269893 λ/4 must be laminated on a linear polarizing film such that the slow axis of the plate and the opening and closing of the film are 4 5 A circular polarizing plate is formed at the corners. It is preferably a roller-to-roller laminar combination. It is preferably provided with an absorption axis and a longitudinal clamp 45. The linear polarizing film and the hygroscopic axis are parallel to the longitudinal λ/4 plate. It is also preferable to use a rectangular linear polarizing film whose absorption axis is parallel to the longitudinal direction, and a rectangular λ/4 plate of the slow phase axis and the longitudinal direction 45. Japanese Patent Application Laid-Open No. 5 (1 9 9 3 ) - 2 7 1 1 8 and 5 ( 1 9 9 3 ) - 2 7 1 1 9 _ ^ The phase retarder of the table contains a high hysteresis birefringence film and a low hysteresis compound film. Lamination of these complexes The refractive film allows its optical axis to cross vertically Φ ° ^ The hysteresis difference between the two films is λ/4 plate in the entire visible wavelength range. The theoretical phase retarder can be used as the λ/4 plate in the entire visible wavelength. Japan Patent application publication! 〇 (〗 〖9 9 8 ) _ 6 8 8丨6 published two-layer polymer film made of the same material as the retarder package t S. At a certain wavelength, each film provides λ /2, then λ/4 is provided in a wide wavelength range. 专利 Patent Application Publication 1 〇 (1 9 9 8 ) - 9 0 5 2 1 also discloses the lamination of two polymer films to form a phase detector. This phase detector also provides λ/4 over a wide wavelength range. The 0 λ/4 plate preferably contains a single polymer film. More specifically, it is preferably a single film λ/4 plate described in Japanese Patent No. 2000-0133 and No. 0 0/265. The shorter the wavelength at the time of measurement, the smaller the "phase" difference of the λ/4 plate. The λ/4 plate preferably has a hysteresis (Re4 5 0 ) of 100 to 125 nm measured at 450 nm, and a hysteresis (Re 5 9 0 ) of 120 measured at 590 nm. Up to 160 nm. Such Re hysteresis is preferably a condition of satisfying Re590-Re450 > 2 nm, and particularly preferably Re590-Re490^: 5 nm' is preferably Re590-Re4502l0 nm. -4 1- 1269893 The hysteresis (R e 4 5 Ο ) measured at 450 nm is preferably 1 〇 8 to 1 2 5 nm, and the hysteresis measured at 550 nm is preferably 1 2 5 to 1 4 2 nm, the hysteresis measured at 590 nm is preferably 130 to 152 nm; and Re 5 50 and Re590 are better than Re590-Re55022 nm. , especially for Re590-Re55025 nano, preferably Re590-Re550>10 nanometer. Further, Re 5 50 and Re 4 5 0 are preferably those satisfying Re 5 50-Re45 0210 nm. The hysteresis (Re) is calculated by the following formula:

Re=(nx-ny)xd where nx is the refractive index along the slow axis (that is, the direction providing the maximum refractive reluctance) on the plane of the λ/4 plate; ny is perpendicular to the direction of the axis in the plane The refractive index; d is the thickness of the λ/4 plate in nanometers. The λ/4 plate is preferably a monopolymer film which satisfies the following conditions: l <(nx-nz)/(nx-ny)<2 where nx is the refractive index along the slow axis in the λ/4 plate plane, Ny is the refractive index of the slow phase axis of the vertical λ/4 plate plane, and ηζ is the refractive index of the λ/4 plate thickness direction. To prepare a preferred λ/4 plate having the aforementioned optical properties, the polymer film can be extended. Or after coating with a rod-shaped liquid crystal, the polymer film is subjected to a wiping treatment to align the rod-shaped liquid crystal molecules. Then, for example, photopolymerization is used to fix the alignment of the molecules to form an optically anisotropic layer. The polymer film thus treated has a thickness of λ/4 ί. This λ/4 plate can be tilted or wiped to control the direction of the slow axis. -42- 1269893 (λ/4 plate containing a single film) The thickness of a single film constituting the λ/4 plate is preferably 5 to 1,0 0 μm, particularly preferably 10 to 500 μm, more preferably 40 to 200 μm. Preferably, it is 70 to 120 microns. (Polymer film) The polymer for preparing a polymer film is the above-mentioned transparent carrier material for preparing an optical compensation film. The polymer is preferably a cellulose ester, more preferably a cellulose ester of a lower fatty acid. "Low fatty acid" means a fatty acid of C 6 or below. The carbon number is preferably 2 (cellulose acetate), 3 (cellulose propionate) or 4 (cellulose butyrate). Particularly preferred is cellulose acetate. It is also possible to use cellulose esters of mixed fatty acids such as cellulose acetate propionate and cellulose acetate butyrate. The average acetic acid content (degree of acetylation) of cellulose acetate is preferably from 45.0 to 62.5%, particularly preferably from 5 5 to 6 1 · 0 %, preferably from 5 9 · 0 to 6 0.0 % . (Hysterescence Increasing Agent) A hysteresis rising agent may be added to the polymer (preferably cellulose acetate) film to control the hysteresis. The hysteresis rising agent is, for example, a triphenyltriazine-based compound (which can be used in an optical compensation film). Preferably, however, the retardation-increasing agent is a rod-shaped compound having at least one aromatic ring, such as p-n-heptylphenol diester of 1,4-cyclohexanedicarboxylic acid. The amount of the retardation rising agent is preferably from 〇5 to 20 parts, particularly preferably from 0.1 to 10 parts, more preferably from 0.2 to 5 parts, more preferably 〇. 5 parts by weight per 〇〇. Up to 2 servings. Two or more hysteresis risers can be used. Preferably, the retardation enhancer has a maximum absorption band wavelength in the range of from 250 to 4,000 nm, and preferably has substantially no absorption band in the visible wavelength range. Further, it is preferable to extend the polymer film to control the refractive index (the refractive indices η X, n y and η z in the film surface along the retardation axis, the moving axis and the thickness direction). The film can be obliquely extended as in the aforementioned PVA film, so that the retardation axis and the longitudinal clamp 45 ° ° (coated λ/4 plate) λ/4 plate can be the coating type described in Japanese Patent No. 2001-21720. λ/4 board. The coated λ/4 plate contains two optically anisotropic layers sandwiching the twisted structure' with significantly improved properties over a wide wavelength range. The two optically anisotropic layers are preferably a birefringent film or a layer containing a liquid crystal. It is especially preferred that at least one layer of optically anisotropic layer is a liquid crystal layer, and preferably two layers of ® are liquid crystal layers. The optical properties of the liquid crystal layer are easier to control than the birefringent film. In the heterogeneous layer containing liquid crystal, the direction of the wiping phase of the liquid crystal molecules can be used to orient the late phase axis. If the amount and type of liquid crystal are properly controlled, the hysteresis can be adjusted closely. The optical anisotropic layer thickness and orientation birefringence 値 is measured in the range of 丨5 〇 to 350 nm in the range of 550 nm (i.e., in the middle of the visible wavelength range). In the twisted structure, the twist angle is 3 to 45. . If the film layer has no twisted structure, then the product of the thickness and the orientation of the complex refracting enthalpy is hysteresis. (Hyperrefractic film) The optically anisotropic layer of #彳 is preferably in the range of 5 5 〇 nanometer (that is, in the middle of the visible light wavelength range), and the phase π difference is 60 to 170 nm. Refractive film. The birefringent film polymer is, for example, a polyolefin (such as polyethylene, polypropylene, raw borneol-based polymer), polyvinyl chloride, polystyrene, polyacrylonitrile, poly-flavor, poly-alcohol, polyvinyl alcohol, poly Methacrylate, polyacrylic acid polymer & _, vitamin ester. Copolymers or mixtures thereof can also be used. -44- 1269893 The optical anisotropy of the film is preferably derived from stretching. The film is preferably uniaxially stretched. The uniaxial extension is preferably a longitudinal extension using two or more rollers of different rotational speeds, or a lateral extension of the two sides of the film by a tenter. The film of two or more layers is laminated so that the obtained laminated film satisfies the aforementioned conditions. The polymer film is preferably produced by a solvent lamination method to reduce film non-uniformity. The thickness of the film is preferably from 20 to 5,000 nm, more preferably from 50 to 200 nm, most preferably from 50 to 100 nm. (Coil-shaped polarizing plate) The λ/4 plate and the linear polarizing film were laminated so that the slow phase axis of the skin and the absorption axis of the film were substantially sandwiched by 45 ° to obtain a roll-shaped polarizing plate. If the absorption axis of the film and the longitudinal direction are substantially sandwiched by 45 °, the retardation axis of the plate is preferably substantially parallel to the longitudinal direction. If the absorption axis of the film is substantially parallel to the longitudinal direction, the retardation axis of the plate is preferably substantially 5 5 ° from the longitudinal direction. The retardation axis of the plate and the absorption axis of the film are preferably from 4 1 to 49 °, more preferably from 42 to 48, more preferably from 43 to 47, and most preferably from 44 to 46. Thus, the λ/4 plate and the linear polarizing film were laminated to obtain a laminated composition. On the back side of the composition, a protective film is preferably added. The protective film is preferably made of a transparent polymer (light transmittance of 80% or more). Transparent polymers are, for example, polyolefins (e.g., Artone®, Zeonex®, Zeonor®), cellulose acetate, polycarbonate, polyarylate, poly maple, and polyether maple. Commercially available transparent polymers and films are also available. The retardation axis of the protective film is preferably substantially parallel to the absorption axis of the linear polarizing film, the linear polarizing film and the λ/4 plate, or the linear polarizing film and the protective film are laminated using the adhesive 1269893. The adhesive is preferably an aqueous solution of a polyvinyl alcohol resin or a boride, and more preferably an aqueous solution of a polyvinyl alcohol resin. The polyvinyl alcohol-based resin is, for example, a denatured polyvinyl alcohol having a non-alcohol functional group such as an ethyl acetyl group, a sulfo group, a carboxyl group or a hydrocarbyloxy group. The dry thickness of the adhesive has preferably been 〇 01 to 1 〇 micron, and more preferably 0.05 to 5 μm. (Liquid Crystal Display "LCD") The LCD of the present invention can be designed in a normal white mode (a low or high voltage will respectively display a bright or dark image), or a normal black mode (a low or high voltage will respectively reveal a dark or bright image) ). If the invention is applied to a reflective or semi-transmissive L c D, the active matrix is superior to the simple matrix mode. It is especially preferred to use TFT (Thin Film Transistor), TFD (Thin Film Diode) or MTM (Metal Insulated Metal Mode). In the case of the TFT mode, it is preferred to use cold polycrystalline or grain boundary tannin. The LCD is described in various literatures or publications, such as "Liquid Crystal Device Handbook" (Japanese, Japan Science Promotion Association, 142th Committee, Nikkan Industrial Press; "LCD Application" (Japanese), 〇ka η 〇, B aifuka η Press; "Color LCD π (Japanese, Kobayashi, Sangyo Shuppan Press; ''Next Generation LCD Monitor'' (曰文, Uchida, Kogyou Chosakai Press; "The latest LCD π (Japanese), Young Liquid Crystal Scholars Group, Sigma Press; and "Liquid Crystal: Original and New Applications of LCD" (Japanese), Young Liquid Crystal Scholars Group, Sigma Press. (IV) Embodiments "Embodiment 1 1 : Η AN貘 LCD Preparation of cells on a glass substrate having an electrode of Τ Ο 铟 (indium tin oxide), a layer of 12269983 polytheneimide was added, and the layer was subjected to wiping treatment to form an alignment layer. Further, on the other glass substrate having the ITO electrode Depositing yttrium oxide to form an alignment layer. Place the two glass substrates face to face' so that the gap between the two plates is 4 · 8 μm. The nematic liquid crystal (ZLI 1132 of Mok Corporation) Δη = 0.1 3 9 6) Inserted into the gap to obtain the liquid crystal cell of the AN mode. The hysteresis of the obtained liquid crystal cell is 671 nm. (Preparation of the λ / 4 plate of the roll type) At room temperature, mixing 120 parts by weight of cellulose triacetate (average acetic acid content 5 9.5%), 9.3 parts by weight of triphenyl phosphate, 4.6 8 parts by weight of biphenyl diphenyl phosphate, 1.00 parts by weight of retardation rising agent (anti-1 〆-ring Hexanedicarboxylphenol-4-n-heptanol diester), 543.14 parts by weight of dichloromethane '99.35 parts by weight of methanol and 7.9 parts by weight, and dissolved into a solution (blending solution). The viscous Doppler liquid is drenched in a moving stainless steel belt 'send to the drying zone and dried at 25 ° C for 1 minute and at 45 ° C for 5 minutes. The film thus formed contains 30% by weight of solvent. After peeling, it is wound at a faster speed than the moving speed of the steel strip and extends at 130 ° C. During the longitudinal stretching process, the film is transversely contracted. After stretching, in a drying zone at 120 ° C Dry for 30 minutes, then take up. The formed film contains 〇·1% by weight of solvent. The film thickness of the obtained roll shape is 1 〇1 micro. The hysteresis measured by the ellipsometer (M-150 of Sakamoto Spectrum Co., Ltd.) at 450 nm, 550 nm and 590 nm was 119.3 nm, 137.2 nm and 142.7 nm. The axis is parallel to the moving (extended) direction (longitudinal direction). In addition, the refractive index is measured using an Abbe refractometer, and the effect of the angle on the hysteresis is also measured. η X (refractive index along the slow axis), n y (refractive index of the vertical phase axis) and nz (refractive index in the depth direction) of 1 · 60 are measured at 550 nm. 1269893 (Manufacturing method of film-formed linear polarizing film) At 25 t: the PVA film was immersed in an aqueous solution containing 2.0 g/liter of iodine and 4.0 g/liter of potassium iodide for 240 seconds, and immersed at 2 5 ° C for 1 hour. 6 〇 in an aqueous solution of gram / liter of boric acid. The film was stretched by a stretching ratio of 5.3 times the elongation ratio, and then dried to shrink at 80 ° C under the condition that the width was kept constant. It is then removed by a tenter and taken up. The water content of the film before and after drying was 31% and 1.5%, respectively. The difference in moving speed between the left and right sides is less than 〇 〇 5%, and the angle between the two center lines of the film introduction and exiting the tenter is 4 6 °. At the exit, no wrinkles or deformations are visible in the film. The retardation axis and the moving direction (longitudinal direction) of the obtained linear polarizing film were sandwiched by an angle of 45°. At 550 nm, the transmittance and polarization of the film were 43.7% and 99.97%, respectively. (Manufacturing method of roll-shaped polarizing plate) A commercially available triethylene glycol film (Fujitac TD80 from Fujifilm Co., Ltd.) and the aforementioned λ/4 plate were immersed in a 0.1 N sodium hydroxide aqueous solution at 55 ° C for 1 minute to make Both surfaces of the film and the sheet were saponified. One surface of the film is coated with a 30 μm thick polyvinyl alcohol-based adhesive layer, and the linear polarizing film is laminated between the triethylene cellulose film and the λ/4 plate by means of a roll-to-roller roll. . The laminated composition thus obtained is dried at 8 (TC) to obtain a roll-shaped polarizing plate having a thickness of about 241 μm. (Preparation method of optical compensation film) Pour the following ingredients into a mixing tank, stir and heat to dissolve the components. A solution of cellulose triacetate. A solution of cellulose triacetate: -48- 1269893 1 part by weight of cellulose acetate (60.9% acetic acid content) 8 · 1 part by weight of triphenyl phosphate (plasticizer) 3 · 6 Parts by weight of diphenyldiphenyl phosphate (plasticizer) 338 parts by weight of dichlorocarbyl (first solvent) 27 parts by weight of methanol (second solvent) In another mixing tank, 15 parts by weight of the following hysteresis rise is poured a solution of 80 parts by weight of dichloromethane and 20 parts by weight of methanol, stirred and heated to obtain a retardation riser solution. (hysteresis riser)

52 parts by weight of the obtained hysteresis riser solution and 477 parts by weight of cellulose acetate were mixed and stirred to obtain a viscous Doppler solution. The resulting dope was coated with a belt laminator. When the amount of the solvent remaining in the formed film was 50% by weight, the film was peeled off from the belt. The film was stretched by 1 7 % laterally at 130 ° C and placed at 130 ° C for 30 seconds while maintaining the width. The film was then taken out from the jig to obtain a cellulose triacetate film. Re and Rth値 were obtained by measuring cellulose acetate at a wavelength of 550 nm using an ellipsometer (Μ - 150 of Japan Spectrum Corporation). The angle of the retardation axis is measured by the light-49- 1269893 complex refraction analyzer (KOBTA-21 ADH of Qji Scientific Instruments Co., Ltd.) at the horizontally equidistant 1 point. The standard deviation of the slow phase axis is also calculated. The results are shown in Table 1. Table 1 Standard deviation of the retardation angle of the transparent carrier Re値Rth値 Example 1 40 nm 220 nm 1.4° Example 2 40 nm 220 nm 1.3° On the aforementioned cellulose acetate film, coated with #3线The bar was coated with 0.1 N potassium hydroxide solution (solvent isopropanol / propylene glycol / water = 75 / 13 / 12 wt%). After heating at 60 ° C for 1 〇 second, it was washed with a #1 . 6 wire stick and sprayed with 50 ° C water of 500 ml / m 2 by a nozzle. Thereafter, the film was blown three times with a jet spatula. Then, it was dried with hot air of 100 ° C to obtain a cellulose acetate having a saponified surface. ^ On the saponified surface of cellulose triacetate, apply the following denaturing polyvinyl alcohol / 36 g water solution (containing 12 g of methanol and 0 g of glutaraldehyde as a crosslinking agent) using a # 1 4 wire coating bar. It was dried with hot air at 60 ° C for 60 seconds, and dried at 190 Torr for 160 hours to form an oriented layer on the roll-shaped triacetate film. Then, the alignment layer is subjected to a wiping process in the moving direction (longitudinal direction). (denatured polyvinyl alcohol) —(CH2~CH)87.8—(CH2—CH)〇2—(CH2—CH)12.〇—

OH Ο O i i

CO CO

CH3 〇一 (ch2)4—〇一c〇一ch=ch2 -50- 1269893

For the preparation of the coating solution, 38.4 g of the following disc-shaped liquid crystal compound, 4.1 g of ethylene oxide-denatured trimethylolpropane triacrylate (Italian Organic Chemical Co., Ltd.) was dissolved in 1 〇 2 g of methyl alcohol. # 3 6 0 ), 0.8 g of cellulose acetate butyrate (CAB - 5 5 1 - 0.2 from Eastman), 0.2 g of cellulose acetate butyrate (CAB-531 _1 from Eastman), 1.5 g light Polymerization initiator (Irgacure® 907 from Ciba) and 0.5 g sensitizer (KayaCiM, e® DETX from Kayaku, Japan), and then coated the solution on the orientation layer with a wire-coated rod (4 5 ° along the longitudinal direction) Wipe in the direction). The thus treated film was fixed to a metal frame and heated at 130 °C for 2 minutes to orient the dish-shaped compound molecules in a single-block dish nematic phase. Ultraviolet rays were emitted from a high-pressure mercury lamp (120 W/cm), and the film was irradiated at 130 ° C for 1 minute to polymerize the disc-shaped liquid crystal molecules. It was then cooled to room temperature, so that the formed optically anisotropic layer was used to prepare an optical compensation film. (disc liquid crystal compound)

On the plane containing the rubbing direction and the normal line, Re (°) and Re (40°) 汲Re are measured from the normal direction and the direction of the normal clip 40 ° and the angle of the clip -40 °. -40°). The results are shown in Table 2. 1269893 Table 2 Optical compensation film ReiO °) Re (-40 °) Re (40 °) - Example 1 38 nm 42 nm 83 nm Example 2 40 nm 44 nm 87 nm (reflective HAN mode LCD Method) A liquid crystal cell in which a HAN mode is laminated on a reflective plate used in a commercially available reflective LCD. The optical compensation film is laminated on the unit cell by an acrylic adhesive so that the cellulose triacetate side of the film contacts the unit cell. The cell wiping direction is parallel to the film wiping direction but in the opposite direction. In addition, by using an acrylic adhesive, % laminates the roll-shaped polarizing plate on the laminated film, so that the λ/4 plate of the polarizing plate is in contact with the film, and the retardation axis of the λ/4 plate and the wiping direction of the unit cell are parallel. . This provides a reflective ΗΑΝ mode LCD. The manufactured LCD has the following composition: Rolled polarizer protective film (TD 8 0U) Linear polarizing film (P va/i2 ) Phase detector (λ/4 plate) Optical compensation film transparent carrier (triacetate film) Optical Orthotropic layer (disc liquid crystal layer) Η AN mode liquid crystal cell reflector displays image in liquid crystal cell voltage (white: 2 volts, black: 6 volts), using instrument (ELDIM EZ-Comparative Instrument 1 60D) Pre-measurement before the measurement. The viewing angle of 5 or more contrast is left-right (and perpendicular to the wiper -52-1269893). The results are shown in Table 3. Table 3 LCD Front Contrast 値 Vision Angle Example 1 15 120° Example 2 12 100° "Preparation of Bending Alignment Mode Liquid Crystal Cell On the glass substrate with I TO electrode, aluminum is deposited, but a part of the window is reserved for secondary transmission. A diffusion refracting plate is formed. The polyimide layer and the layer on the plate were subjected to a wiping treatment to form an alignment layer. Further, a polyimide film was provided on another glass substrate of the IT0 electrode to form an alignment layer. The two glasses are placed facing each other with a gap of 1 〇 micrometer. Nematic liquid crystal (ZLI 1132 of Moker Corporation, Αη = 0.1396) was inserted in this gap to obtain a liquid crystal cell having a curved alignment mode. The retardation 値 of the obtained liquid crystal layer was 699 nm. A solution was obtained by mixing the following ingredients, and gradually added cellulose triacetate powder (average particle size 2 mm) with stirring therein. Cellulose triacetate 1 〇〇 parts by weight 8.9 parts by weight 4.9 parts by weight 2 4 0 parts by weight 10 0 parts by weight 2 5 parts by weight 2 5 parts by weight 〇 5 parts by weight 6.7 parts by weight

Cellulose triacetate (acetate content 60.5%) Triphenyl phosphate (plasticizer) Phenylphenyl phosphate (plasticizer) Methyl acetate (first solvent) Cyclohexanone (second solvent) Methanol (third Solvent) Ethanol (fourth solvent) Ceria particles (average size 20 nm) For the hysteresis riser of Example 1 - 53 - 1269893 The mixture was allowed to stand at room temperature (25 ° C) for 3 hours. The resulting hetero-phase colloid was cooled at -7 ° C for 6 hours and then heated to 50 ° C to obtain a dope. - A cellulose triacetate film was prepared as in Example 1 by adhering the Doppler solution. The optical properties and thermal conductivity of this film are listed in Table 1. The cellulose acetate membrane was immersed in a 1.5 N aqueous sodium hydroxide solution at 5 5 ° C for 2 minutes. After washing in a room temperature water bath, neutralize it in 3 (TC with 〇 1 N sulfuric acid. Wash it again in a water bath at room temperature, and dry it in hot air at 1 ° C. The surface of the cellulose acetate film is already Saponification. Example 1 was formed on the surface of the saponified film to form an alignment layer' and subjected to a wiping treatment. To prepare a coating solution, 4 1 g of the disc-shaped liquid crystal compound used in Example 1 was dissolved in 1 〇 2 g of methyl ethyl ketone, 4.0 g. Ethylene oxide denatured trimethylolpropane triacrylate (V# 3 6 0 of Osaka Organic Chemical Co., Ltd.), 0.90 g of cellulose acetate butyrate (CAB - 5 5 - 0 · 2 of Eastman), 0.2 3 g of cellulose acetate butyrate (CAB-53 1-1 from Eastman), 1.35 g of photopolymerization initiator (Irgacure ® 907 from Ciba) and 0 · 4 5 sensitizer (Japan) Kayaku's K ayacure ® DETX ). The solution was applied to the orientation layer using a #3 wire coating rod. The thus treated film was fixed with a metal frame and heated in a thermostat at 1 30 ° C for 2 minutes in a single block dish. Orienting the dish in the nematic phase, then purple by a high pressure mercury lamp (1,200 watts/cm) The outer line is at 13 〇. The film is irradiated for 1 minute to polymerize the disc-shaped liquid crystal molecules. The film is cooled to room temperature. The optically anisotropic layer thus formed can be used to prepare an optical compensation film. The measurement includes the wiping direction and the normal. On the plane, along the normal line, and the normal line clamp the hysteresis 4 in the direction of 40 ° and -40 °. The results are listed in Table 2. -54- 1269893 (Preparation of linear polarizing film) in 25 t in 2 Immerse the P VA film in an aqueous solution of gram / liter of iodine and 4.0 g / liter of potassium iodide for 240 seconds, and then immerse in an aqueous solution containing 1 gram / liter of boric acid for 6 sec. at 25 liters. The film was stretched and then dried at 80 ° C under a condition of constant width and coiled. The water contents before and after drying were 30% and 1.3%, respectively.

The retardation axis of the obtained linear polarizing film is parallel to the moving direction (longitudinal direction). The light transmittance and polarizing rate of the film at 550 nm were 43.9% and 99.96%, respectively. (Preparation method of λ/4 plate) The preparation method of the optical compensation film of Example 1 was carried out by coating the following coating solution in cellulose triacetate with a wire coating bar, and drying at 130 ° C for 3 minutes to form a thickness of 0.3 μm. The vertical alignment layer. Solution for vertical alignment layer

5.0% by weight steroid denatured polyglycine 25.0% by weight N-methyl-2-pyrrolidone 2 5 . 0% by weight ethylene glycol monobutyl ether 4 5 . 0 % by weight methyl ethyl ketone film roll with vertical alignment layer Take the tube and apply it to the moving direction (longitudinal) clip 4 5 ° for wiping alignment. The following coating solution was applied on the vertical alignment layer and irradiated with ultraviolet rays emitted from a high pressure mercury lamp (500 W/cm 2 ) for 1 second, and the resulting λ/4 plate λ/4 plate retardation 138 was 138 nm. And the retardation axis and the longitudinal direction of the film surface are 4 5 °. Solution for optically isotropic layer 32.6 wt% Dish liquid crystal used in Example 1 -55- 1269893 0.2 wt% 3.2 wt% 0.4 wt% 1.1 wt% 0.3 5 wt% 62.5 wt% palm compound (C-2) acetic acid Butyric acid cellulose trimethylolpropane triacrylate Irgacure® 907 (Ciba)

Kay acure® DETX (Sakamoto Kayaku) The following '' palm compound n (C-2) methyl ethyl ketone

R

(Method of manufacturing a roll-shaped polarizing plate)

The surface of the commercially available cellulose triacetate film (Fujitac TD80 of Fujifilm Co., Ltd.) and the aforementioned λ/4 plate were saponified by the method of Example 1. The cellulose triacetate of each film is coated with a polyethylene adhesive layer of about 30 μm thick, and the linear polarizing film is applied by means of a roller to a roller, and a triacetonitrile cellulose film and λ/4. Plate and sandwich laminate. The resulting composite layer composition was dried at 80 ° C to obtain a roll-shaped polarizing plate having a thickness of about 241 μm. (Semi-transmission type 〇 C B alignment mode L C D) The optical compensation film is laminated on each side of the curved alignment mode liquid crystal cell by an acrylic adhesive so that the film of cellulose triacetate can be brought into contact with the unit cell. The alignment of the cells is parallel to the alignment of the film. Further, on the film, the roll-shaped polarizing plate was laminated with an acrylic adhesive so that the λ/4 plate of the polarizing plate was in contact with the film. -56- 1269893 The orientation of the slow phase axis and the unit cell of the λ/4 plate is anti-parallel. A backlight group is obtained by sequentially laminating the cymbal and the diffusion plate on the side of the reflecting plate. Thus, a semi-transmissive type ~ L C D is obtained. The resulting LCD has the following composition: Rolled polarizer protective film (TD80U) Linear polarizing film (pva/i2) Phase retarder (λ/4 plate) Optical compensation film transparent carrier (triacetate film) βι Optical direction Layer (disc liquid crystal layer) Liquid crystal cell in curved alignment mode (C Β mode) Optical compensation film optical anisotropic layer (disc liquid crystal layer) Transparent carrier (triacetate cellulose) Rolled polarizing plate retarder ( λ/4 plate) | Linear polarizing film (pva/i2) Protective film (TD 8 0 U ) The ruthenium diffuser backlight plate displays voltage in the liquid crystal cell (white: 2 volts, black: 6 volts), and displays images, and The front view contrast was measured using an instrument (ELDIM EZ-Comp. 160D). The comparison of the viewing angles measured from the left-right direction (vertical alignment) is 5 -57 - 1269893. The results are listed in Table 3 of the -U-face: 〇:) The diagram is simple to illustrate that Figure 1 is an aggregation. A plan view of an example of a diagonally extending film of a film. Fig. 2 is a plan view of another example of a diagonal extension of a polymer film. Fig. 3 is a plan view of a polymer film extending diagonally. Figure 4 is a plan view of the polymer film extending diagonally. Figure 5 is a plan view of another example of the polymer film extending diagonally. Figure 6 is a diagonal extension of the polymer film. Further, the flat view of the example is a plan view of a conventional polarizing plate formed by stamping. FIG. 8 is a plan view of a schematic view of a polarizing plate of the present invention formed by stamping. Center line 13,23 Track A 1... Ai 1 Pinch C!". Cr 1 Grip 1 2,22 Center line AX, C :X Release point L 1,L2 Distance between two sides 18,28 Last grip 7 1,81 Absorption axis 72,82 portrait -58-

Claims (1)

1269893 No. 9 2 1 Ο Ο 9 4 No. 3 "Linear polarizing film and phase detector symplectic. Polarized version." Patent integrity 1 (2*006 # 6 T: ' *- ^ ' i mi- nil iV * . >y Vi pick, patent application scope 1. A polarizing plate comprising a linear polarizing film having a longitudinal direction and an absorption axis, and a λ /4 plate having longitudinal and late phase axes, wherein the longitudinal direction of the linear polarizing film is substantially parallel In the longitudinal direction of the λ / 4 plate, and the absorption axis of the linear polarizing film is substantially parallel to the longitudinal direction of the linear polarizing film, the retardation axis of the λ / 4 plate is substantially at a 45 ° angle to the longitudinal clamping of the λ / 4 plate, and The λ /4 plate has a hysteresis of 120 to 160 nm at a wavelength of 590 nm. 2. The polarizing plate of claim 1 wherein the λ plate has a wavelength of 450 nm. The measured Re hysteresis 値 is 1 0 0 to 1 25 nm, and the hysteresis 値 must conform to Re590-Re450g2 nm; while the Re590 system represents Re retardation measured at a wavelength of 590 nm, and Re45 0 represents at a wavelength of 450. Re-hysteresis measured by nanometer. 3. A polarizing plate comprising a linear polarizing film having a longitudinal and absorption axis and a λ /4 plate having longitudinal and late phase axes, The longitudinal direction of the linear polarizing film is substantially parallel to the longitudinal direction of the λ /4 plate, and the absorption axis of the linear polarizing film is substantially parallel to the longitudinal direction of the linear polarizing film and the retardation axis of the λ /4 plate is substantially parallel. In the longitudinal direction of the λ / 4 plate, and the λ / 4 plate has a hysteresis 値 of 12 〇 to 160 nm at a wavelength of 5 90 nm. 4. The polarizing plate of the third aspect of the patent application 'where λ The /4 plate has a Re hysteresis measured at a wavelength of 450 nm and is 1 to 0 to 25 nm ' and the hysteresis must conform to Re5 9 0-Re45 0 g 2 nm; and the Re5 90 system represents Re retardation measured at a wavelength of 590 nm, Re4 5 0 represents a 1269893 Re hysteresis measured at a wavelength of 45 0 nm. 5. A liquid crystal display comprising a liquid crystal cell and at least one polarizing plate, the liquid crystal cell comprising a pair a substrate, each of which comprises a transparent electrode having an alignment layer on the surface, wherein the curved alignment or mixed alignment nematic liquid crystal is sealed between the alignment layers of the two substrates, and wherein the polarizing plate is selected from any one of the claims ii to 4 a polarizing plate. 6. A liquid crystal display according to claim 5, wherein the liquid crystal And an optical compensation film between the polarizing plate, the optical compensation film comprises a transparent carrier and an optical anisotropic layer with a fixed alignment of the dish-shaped liquid crystal, wherein the optical anisotropy of the optical anisotropic layer is Re(0°) hysteresis値For 10 to 60 nm, the Re(40°) hysteresis is 80 to 130 nm, while the Re (-40°) hysteresis is 10 to 60 nm. 7. The liquid crystal display of claim 6, wherein the transparent carrier of the optical compensation film has an optical anisotropy of 10 to 70 nm, and a hysteresis of Rth of 70 to 400 nm. A method of preparing a polarizing plate according to any one of claims 1 to 4, which comprises continuously feeding the optical polymer film to a curved path, when the jigs on both sides of the polymer film are clamped, The film is stretched to prepare a λ /4 plate according to the following conditions: (i) the longitudinal stretching ratio is in the range of 1.2 to 10, and (ii) the lateral stretching ratio is in the range of 1.1 to 2 0.0, (iii) The longitudinal movement rate difference between the two sides of the clamp is 1% or less, (iv) the state of maintaining the volatile content of 5% or more, (v) at the exit of the path, the direction of movement and the direction of the substantial extension -2- 1269893 An angle in the range of 20 to 70°; characterized in that the liquid crystal display operates in a CB (optical compensation bending) mode, a HAV (hybrid-aligned-nematic) mode, or an ECB (electronically controlled complex refractive index) mode.