TW201020631A - High-contrast polarizing plate and liquid crystal display device - Google Patents

Abstract

The present invention relates to a polarizing plate. The polarizing plate includes a polarizing film of polyvinyl alcoholic resin adsorbed-oriented with a dichromic pigment. The polarizing plate is characterized in that the polarizing film monomer contrast (SCR( λ )) defined in equation (1) at different wavelengths satisfies equations (2) and (3) SCR(λ)=T “ (λ)/T ⊥ (λ)...(1) where T “ (λ)=0.5*[Tp(λ)2+Tc(λ)2]/100 T ⊥ (λ)=Tp(λ)*Tc(λ)/100 Tp(λ) denotes the transmission factor (%) of the polarizing film and is determined by the relationship between linear polarization of incident light with an wavelength of λ nm and a parallel Nicol prism. Tc(λ) denotes the transmission factor (%) of the polarizing film and is determined by the relationship between linear polarization of incident light with an wavelength of λ nm and a crossed Nicol prism. Both Tp(λ) and Tc(λ) can be obtained by measuring polarized ultraviolet and visible absorption spectra with a spectrophotometer. [(SCR(550)+SCR(600))/2] ≥ 30,000...(2) 3,000 ≤ SCR(450) < 30,000...(3).

Description

201020631 VI. Description of the Invention: Field of the Invention The present invention relates to a high contrast liquid crystal display device which is clearly displayed, and a polarizing plate used in the device. [Prior Art] The polarizing film is widely used as a form of dichroic dye adsorbed on a polyethylene glycol resin film. Further, an iridium-based polarizing film containing iodine as a dichroic dye or a dye-based polarizing film containing a dichroic direct dye as a dichroic dye is known. These polarizing films are usually formed of a transparent protective polarizing plate such as an ethylene glycol-based cellulose or a cyclic olefin, which is composed of an aqueous solution of a polyethylene-based wax on one side or both sides. The surface of the 曰 polarizing plate is widely used; it is used as an optical component for a liquid crystal display device. Liquid = No device is used as a liquid crystal TV, a computer screen, and a notebook computer to expand its market. In particular, the mobile phone system is very different from generation to generation. Especially when it is required to be lightweight and thin, and to reduce costs, it also requires an improvement in display quality. In addition, the popularity rate of LCD TVs has risen sharply in the past few months, and this has also led to an increase in display quality while reducing costs. There is a kind of "contrast" in the display quality, such as the value defined by the following formula: ··, 々 double brightness) ❻ 对比 contrast of the display device = (brightness of Bai Xianke) / (in the case of black display, the brightness is indicated by The brightness measured by the market is 321533 4 201020631, for example, a color brightness meter (bm_5a) or a spectroscopic discharge (SR-UL1) f which can be sold by T〇PC〇N (shares), etc. The value is determined by performing a process called luminosity factc correction and correcting the sensitivity of the human eye. The opacity correction will be described in detail later. If the contrast is high, then the black and white is clear and the image can be obtained more clearly-images. Therefore, in this field, the general use is used as visibility (the indicator of νΜΜΗ is used to make this contrast increase one of the ways A method of improving the polarizing performance of a polarizing plate of a necessary member of a liquid crystal J device. Here, the term "polarizing property" mainly refers to a value called a single transmittance and a degree of polarization, which is a value defined by the following formula: Transmittance u)=〇.5XaP(;〇+Te(;L„ Polarization (1) MOOxCTpU.) —Tc( (

Tc(A)) ❹ Here, Τρ( λ ) is the transmittance (%) of the polarizing film of the linear polarized light of the wavelength ληιη of the human shot and the parallel surface of Parallel NiGQl, Tc(1) is a human The transmittance (%) of the polarizing film measured by the relationship between the linear polarized light of the wavelength Anm and the crossed Nicols (c-NiC〇1), which was measured by a spectrophotometer for polarized ultraviolet visible absorption spectrometry. Shaped value. According to the individual transmittance (1) and the degree of polarization (1) of the material, the sensitivity is determined as the sensitivity of the visual sensitivity correction. 2 is called the visual sensitivity correction single transmittance ((7) and the visual sensitivity correction polarization (Py). The sensation of the sensibility is described in detail later. The Ty and Py can be easily measured by, for example, a spectrophotometer (model TM) 321533 Ψ 201020631 manufactured by a sputum spectrophotometer.

Up to 7th, since the Py and Ty of the partial plate are still improved, the polarizing performance of the polarizing plate is improved by increasing Py, etc., to enhance the contrast of the liquid=display device, but recently in the polarizing plate. The polarization performance is also saturated, and it is close to the theoretical limit value. Therefore, the status quo has become no longer expected to greatly improve the polarization performance. In terms of the Ty and Py values measured by V71〇〇, the polarizing performance of the best type of polarizing plate in recent years is .996% of py===, Ty=42.5% or so, but it is substantially difficult to (4) Produce polarizers with higher properties than their counterparts. In the current situation, for example, if the degree of polarization is to be increased, the transmittance is lowered and darkened. Conversely, if the transmittance is to be increased, the degree of polarization is lowered, which is difficult to achieve at the same time. However, on the other hand, in fact, the requirement for improving the liquid crystal display is very high, and it can be said that it is necessary to fundamentally break away from the above-mentioned improvement method and seek a breakthrough based on novel ways of thinking. [Summary of the Invention]

One - π is set to have a higher contrast than before; 2 set. Moreover, it is an object of the present invention to provide a method for slanting 1 and manufacturing ambiguity of the device. In order to solve the above-mentioned problems, the inventors of the present invention traced the results of the "study: rationality and careful research, and found that the rate of the current rate ==:: is estimated as a benchmark." The way of thinking such as "degree" is not expected to be a higher reason for burial" and it is found that understanding the characteristics of each wavelength of the polarizing plate can be better than today. 321533 6 201020631 The epoch-making novelty of the display device Method, thus completing this description. Specifically, it has been found that it is often important to set the wavelength of the light of the back light and the polarization of the polarizing film of the polarizing plate (the wavelength dependency of the Sc is a specific relationship). In addition, a method for manufacturing a polarizing plate having the characteristic of this name has been successfully developed. That is, the present invention has a polarizing plate which is adsorbed and oriented with a dichroic dye in a polyethylene glycol resin film. a polarizing film of a polarizing film,

It is characterized in that the polarizing film in each wavelength defined by the following formula (1) of the polarizing film is compared (8) U)) satisfying S* (Λ) (λ) /ΤΑ (Λ) of the following formulas (2) and (3) (1)' (here, ΤΡ(1) is the transmittance (%) of the polarizing film measured by the relationship between the linear polarization of the incident wavelength and nm and the parallel Nicols, and the (1) is incident: 10λ mn linear polarization The partial (four) (8)' with the crossed Nicols is the measured value obtained by spectrophotometer and the spectral measurement. , [(SCR(550) + Scr(600))/2] by 〇, _ ... (2) 3, 〇〇〇^Scr(450) &lt;30, 0〇〇^ ... C3) Preferably, one of the polarizing films is coated with a cellulose acetate resin layer and a layer of a cycloolefin-based tree (tetra) film is laminated on the surface of the polarizing film; or the surface of the film is laminated with a layer of 321533 7 201020631 film, and on the other side, a layer of peelable self-adhesive protective film is laminated by an adhesive layer. Further, the adhesive layer is preferably formed of a water-based adhesive.

Further, the polarizing plate of the present invention is a polarizing plate used in a liquid crystal display device including a backlight and a liquid crystal cell, wherein the liquid crystal display device preferably mounts only the liquid crystal cell in the backlight and will In the spectrum measured in a state where the backlight is lit, the blue light emission peak wavelength (Bmax) and the red light emission peak wavelength (Rmax) satisfy the following formula (4). (Rmax-550) &lt; (550-Bmax) (4) Further, the present invention relates to a method of manufacturing the polarizing plate described above, characterized in that a film is laminated on a polarizing film having a moisture content of 9% or more. The surface is heat treated at a temperature of 7 or more within 40 seconds after the layer is laminated.

Furthermore, the present invention relates to a liquid crystal display device comprising a liquid crystal display device including a backlight and a liquid crystal cell and the polarizing plate, wherein the liquid crystal cell is placed on the backlight and the backlight is illuminated. In the spectrum measured in the state, the blue emission peak wavelength (Bmax) and the red emission peak wavelength (Rmax) satisfy the following formula (4). (Rmax - 550) &lt; (550 - Bmax) (4) The polarizing plate of the present invention has a sensibility-corrected polarization (Py) or a sensible-corrected single-transmittance (Ty) even for its polarizing plate alone. Compared with the conventional polarizing plate, when used in a liquid crystal display device having a backlight and a light-emitting wavelength characteristic of a liquid crystal cell (color filter), the present invention is compared with the conventional polarizing plate using S 321533 201020631. The written contrast of the liquid crystal display device can be greatly improved. [Embodiment] Hereinafter, the present invention will be specifically described. In a conventional liquid crystal display device, when light emitted from a backlight through a color filter of a liquid crystal cell is investigated, not all wavelengths are the same, and there are strengths depending on wavelengths. This strength is determined by the illumination spectrum of the backlight and the design of the color filter. ® Backlight determines the shape of the luminescence spectrum to some extent depending on the type, and its shape varies depending on the type. For example, a Cold Cathode Fluorescent Lamp (CCFL) type having an emission spectrum shown in Fig. 1 or a Light Emitting Diode (LED) having an emission spectrum shown in Fig. 2 )Wait. Since the light-emitting principles of these components are different, the spectral shape also has a certain degree of characteristics. Further, on the other hand, since the design of the color filter of the liquid crystal cell is important in the color formation of the display device, the design of each company is different. Usually, most of them are composed of three colors of red (R), green (G), and blue (B). It must be noted that 'in the spectrum produced by the combination of the backlight and the liquid crystal cell (color filter), the Rmax, Gmax, and Bmax of the peak wavelengths of the three colors of R, G, and B may not be designed to be equally spaced. . This is a problem in the color formation of the display device. The reason is due to the wavelength characteristics of the backlight and the color filter. For example, in the case of a mobile phone using a white LED or the like, in consideration of the viewpoint of color formation or the characteristics of the bypass light, it is preferable that Bioax is about 450 ηπι, Gmax is about 550 nm, and Rmax is about 600 nm. 321533 9 201020631 First, describe the R ancestor (red luminescence peak wavelength), g (the green luminescence peak wavelength blue luminescence - wavelength & = LED backlight pattern, etc. as shown in the second _ is obvious and very easy / knife However, it can be seen that the muscle type backlight of a large liquid crystal television or the like has one color composed of a plurality of fine peaks as shown in Fig. 1. The Bmax is within the luminous peak of the peak position between 38G and 5G〇nm. The integral area is the largest peak. If the noise is not counted as a peak, as long as it is necessary, a proper normal distribution approximation (no· distribution approximation) is applied to determine the peak position. can. Gmax can be selected in the same manner from the range of the material position of _ to 57 〇 nm, and Rmax can be selected in the same manner from the range of the peak position of 57 至 to 700 nm. Here, the way of thinking about the sensibility correction is introduced. The sensitivity of the human eye is the highest at a wavelength of about 550 nm, and the sensitivity of the light farther away from it becomes worse. Considering this phenomenon, the concept of visual sensitivity correction is based on the normal-distributed calibration curve of the left-right symmetry shown in Fig. 3, which is combined with the actual spectrum. The peak of this calibration curve is located at 550 nm, meaning that the light of this wavelength is the most sensitive to the luminance meter or the human eye. The opposite is the wavelength from the 550 nm, the lower the sensitivity. For example, if the visual sensitivity correction rate of 550 nm is 1.1, then the ratio of 0.40 or less at 450 nm is that even if the same amount of luminescence is used, the light of the wavelength of 450 nm is only measured as 1/50 of the light of 550 nm. 25 brightness. Considering these phenomena, the backlight is re-observed, and the interval between 550 nm and Bmax is about 100 nm, but there is only a gap of 50 nm 10 321 533 201020631 from 550 nm to Rmax. That is, it will become the relationship of the following formula (4). (4) Compared to the red light, compared to the blue peak, (Rmax- 550) &lt; (550-Bmax) This means that when the measured value is used as the brightness, the blue light is measured as Very weak. Conversely, the red peak contributes a lot to the brightness. Regarding this tendency, in particular, when a white LED or the like is used for a backlight or a PDA «belt type use", it is often in principle based on the longer wavelength side of the material (4). However, even in the case of using a large τν such as a CCFL design, it is preferable to satisfy the formula (4) from the viewpoint of coloring or the like, and there is a tendency. In the polarizing plate used in the liquid-display device having the backlight as described above, by adopting a design considering wavelength dependence, it is possible to greatly improve the display without increasing the Ty or Py of the polarizing plate. Comparison of devices. This phenomenon indicates that the importance of each wave length in the polarizing plate used in these devices is different. When combined with the backlight, it is preferable to emphasize the polarizing performance in the red region. The current state of the polarizing plate can be said to be more or less the form of the full wavelength region of visible light to pursue the tendency of polarizing performance. In particular, the illuminance-corrected single-emission transmittance or the sensible-sensitivity correction radiance 'as the name suggests' is a numerical value regarding the sensibility correction. This visual sensitivity correction is also the curve as shown in Fig. 3. For this index, for example, even a spectrum having an orthogonal transmittance (Τρ(λ)) shown in FIG. 4 (a relatively high transmittance in the B, G, and k full wavelengths) Or a polarizing plate having a spectrum of orthogonal transmittance (τρ( a )) as shown in Fig. 321533 201020631 5 (a transmittance at a wavelength of g and R is low and a transmittance at a wavelength of β is high), Since the sensitivity is reduced symmetrically around 550 nm, and both cases will be the same when performing visual sensitivity correction. However, in view of the characteristics of the backlight or the color filter described above, since the wavelength region of red contributes a lot to the luminance, it can be said that a polarizing plate of the type shown in Fig. 5 is preferable. If you want to improve the diopter-corrected polarization, it is necessary to increase the degree of polarization in the whole-wavelength region. Therefore, it is very difficult, but it is of the type from Figure 4, which is close to the theoretical limit value. When the directionality of the type shown in Fig. 5 is changed to switch the viewpoint, there is room for improvement in which it can become a major breakthrough. Figs. 6 and 7 are views showing a polarizing film (&U) of the polarizing film having the spectrum of the orthogonal transmittance Tc(1) shown in Figs. 4 and 5, respectively, in the sense of the above formula (1). Compared with the index such as the orthogonal transmittance or the degree of polarization, the (4) polarizing film _ ratio (, (1)) is the ratio of the maximum value of the minimum value of the transmittance of the natural light with respect to the state of the overlapping 2 ^ flat panel; It is considered to be an indicator that is closer to the comparison of actual liquid crystal display devices. (Measurement Method of Comparison of Polarizing Film Monomers) Hereinafter, a method of measuring the contrast of the polarizing film monomers (Scr(1)) will be described. &lt;Measuring device&gt; A spectrophotometer was used as the measuring device of Tp (1), TcU). In order to correctly evaluate the TcU) value, it is necessary to use a spectrophotometer that can measure a higher absorbance region of 12 321 533 201020 631 degrees, and in the present invention, a device capable of performing an absorbance of about 7 to 8 must be used. Such a spectrophotometer may, for example, be a spectrophotometer (model: V7100) manufactured by 分本分光(股). In the method of injecting a linear polarized light, a method of using a polarized iridium composed of calcite or the like is generally known, and the extinction ratio of the polarized iridium in the present invention is set to 1 CT5. the following. &lt;Measurement Sample&gt; In the polarizing plate, a transparent protective film is laminated on one surface or both surfaces of the polarizing film, but the transparent protective film has a phase difference characteristic, so that the absorption axis and the polarizing film are absorbed. When the axes are not parallel or orthogonal to each other, the incident linearly polarized light becomes elliptically polarized due to the phase difference characteristic of the transparent protective film, and the above Τρ(λ) and TcCA cannot be accurately measured. When evaluating such a polarizing plate, it is necessary to dissociate the transparent protective film from the polarizing plate for measurement. When the transparent protective film does not substantially have a phase difference characteristic, or even if the transparent protective film has a phase difference characteristic, it is bonded so as to be parallel or orthogonal to the absorption axis of the polarizing film, even if it is not transparent The protective film is dissociated from the polarizing plate, and the above Tp (λ ) &gt; Tc( λ ) ° &lt;Measurement&gt; can be accurately measured. Using the above spectrophotometer, linearly polarized light (wavelength; Inm) is incident on the polarizing film. The wavelength is measured by the transmittance measured by the relationship between the linearly polarized light and the parallel Nicols (parallel transmittance: Tp (; 〇), transmittance measured according to the relationship with the crossed Nicols (orthogonal transmission) Rate: Tc (again). Further, from the measured Τρ( λ ), Tc( λ ), ScR is obtained according to the above formula 13 321533 201020631 (1). (Characteristics of polarizing film) Liquid crystal of the present invention The characteristics of the polarizing plate used for the display device are those in which the polarizing film monomer of each wavelength defined by the above formula (1) is compared (SCR (also)) satisfying the relationship of the following formula (2). [(Scr( 550) + Scr(600))//2]^ 30, 000 ...(2) Therefore, the [(Sa(550) + SCR(600))) / 2] of the above formula (2) is 30,000 or more, preferably 40,000 or more, and the contrast of the display device can be improved. Conversely, when it is less than 30,000 In the case of a failure to obtain a comparison of the display device ©, Scr (550) and Scr (600) are preferably 30,000 or more, more preferably 40,000 or more, as shown in Fig. 6. The polarizing plate of the ScR (λ) characteristic is converted into a polarizing plate of the type having the Scr (λ·) characteristic shown in Fig. 7, and although the Scr of 550 nm or 600 nm is increased, the Scr near 450 nm is decreased, and becomes The relationship is as follows: [(Scr(550) + Scr(600))/2]&gt;Scr(45〇) ^ This is due to, for example, a high-temperature, high-humidity treatment described later in a polarizing film having an adsorption orientation. Increasing the ratio of Is in the iodine in the polarizing film increases the absorption on the high-wavelength side, and the absorption on the low-wavelength side is relatively reduced due to the decrease in the ratio of I 3 . The phenomenon that the degree of orientation of the break itself has increased has also confirmed the rise of the Scr resulting in the overallity. As mentioned above, The contrast of the polarizing film monomer at the wavelength of the B (blue) region is reduced, and the LED backlight or color filter with less contribution to blue is used. 14 321533 201020631 piece % 'If the visual sensitivity correction is taken into consideration, it is not alive. The polarizing film alone under the wavelength of the _ domain firstly displays the contrast of the display device, and the liquid helium is pursued from the point of view of the display device y 5 y, etc. from the viewpoint different from the conventional polarizing plate. 'The polarizing performance is already near the limit of the theoretical limit.' Now, in the development of a highly contrasting board for display devices, it can be said that (the method of manufacturing a polarizing plate) the polarizing plate of the present invention can be, for example, Produced as described, but. (1) Step of Producing Polarized Film 匕 The polyethylene resin constituting the polarizing film is usually obtained by winding a polyvinyl acetate resin. The I production of the polyvinyl alcohol-based resin is usually 85 mol% or more, preferably 90 mol% or more, more preferably 99 to 100 mol%. The polyacetate is a copolymer of vinyl acetate and other monomers copolymerizable therewith, in addition to the polyacetate which is a homopolymer of acetic acid. For example, ethylene-ethylene acetate copolymer and the like. Other monomers copolymerizable with vinyl acetate: No: and _, dilute hydrocarbons, B, etc. The degree of polymerization of the polyvinyl alcohol-based resin 〇 〇 = within the circumference, preferably within the range of 5 Å. After 10000, these polyvinyl alcohols can be modified, for example, p经lyvinyif〇rmal or P〇lyvlnylacetal can be used. , polyvinyl butyral (P〇lyvinyl butyral) and the like. Usually, the starting material for the production of polarized light 15 321533 201020631 is made using a thickness of g 1η Λ main 100#m, preferably 30 to 夕枣7 树 树 未 unstretched film. In the industry, the film == to ·m is practical. The unstretched film is sequentially subjected to singulation = dyeing, treatment, hydrazine treatment, and water washing treatment in the order of treatment, uniaxial stretching is performed, and finally, the thickness of the L light/specific film is obtained, for example, 5 to 5〇^m. The manufacturing method of the polarizing film is roughly classified into two manufacturing methods. The third method is to uniaxially extend the poly(10) alcohol-based resin film in air or an inert gas, and then sequentially process the coffee processing step, the pure treatment (four), the meal processing step, and the water washing light (four). The method. In the second method, the polyethylene resin film which is not extended is subjected to solution treatment in the order of _treatment step, dyeing treatment step, Wei treatment == treatment step in the aqueous solution, and is wet in the step before the treatment. Performing a uniaxial extension, and finally performing a 〇/^ in the method - the 'uniaxial extension can be performed in one step ^ can be performed in the step of 2. The extension method may be, for example, a roll-to-roll extension method in which a squeezing roller (a kiss (10) (four) is extended, and a heat-light extension method, a tenter (Japanese Patent No. 27) The extension method, etc. Further, the order is as described above, but the number of treatment baths or the treatment strips may be added to the above-mentioned first method and the other two methods (four). Examples of the steps may be, for example,: after the boric acid treatment, the impregnation treatment is carried out without the water and the material is 321533 16 201020631 • (volute treatment), or the impregnation treatment is carried out without containing _ containing zinc oxide. (Zinc treatment), etc. Each night swelling treatment step is performed by removing foreign matter on the surface of the film, removing the plasticizer from the extremities, imparting dyeability to the next step, and achieving the film: medium purpose. In the range of achieving such a purpose, it is not determined in the range of defects such as extreme dissolution or reverse transparency of the base film. When the film which has been previously stretched in the gas is swollen, for example, the film is impregnated at 20 to 7 (TC, preferably The film is immersed in an aqueous solution of 3 Torr to 6 Torr, and the immersion time of the film is 3 Torr to 3 Torr, preferably ribs | 240 sec., when the original film which has not been stretched from the beginning is swollen, The film impregnation is carried out, for example, in an aqueous solution of 10 to 50 ° C, preferably 20 to 4 (TC). The impregnation time of the film is 30 to 300 seconds, more preferably 6 to 240 seconds. In the swelling treatment step Since the film swells in the width direction and is liable to cause wrinkles in the film, the use of a widening roll (expander roll), a spiral roll type (Spirai r〇u), and a convex surface are used. A known widening device such as a crown roll, a cioth guide, a tenter clip, or a tenter clip is preferable to remove the wrinkles of the film while conveying the film. For the purpose of transporting stability, it is also useful to use a water shower to regulate the flow of water in the swelling bath, or to use Epc (Edge Position Control edge control device, a device for detecting the end of the film and preventing the film from being snaked). In this step, because the film is transported in the direction of the film. In order to eliminate the slack of the film in the transport direction, it is preferable to perform, for example, the speed of the transport before and after the control of the treatment tank. In addition, the swell treatment bath used may be 321533 17 201020631, and pure water may be used. In the range of 0.01 to 0.1% by weight, a succinic acid (described in JP-A-10-153709) and a vaporized product (described in JP-A-H06-281816), inorganic acids and inorganic salts are added. An aqueous solution of a water-soluble organic solvent or an alcohol. The dyeing treatment step with a dichroic dye is carried out for the purpose of adsorbing and orienting the dichroic dye to a film. The treatment conditions are within the range that can achieve such a purpose, and are determined within a range in which the substrate film is not extremely dissolved or reversed. When iodine is used as the dichroic dye, for example, at a temperature of 10 to 45 ° C, preferably 20 to 35 ° C, the weight ratio is iodine / potassium iodide / water = 〇. 〇〇 3 to 0.2 / 0.1 The aqueous solution to a concentration of 10/100 is subjected to an impregnation treatment for 30 to 600 seconds, preferably 60 to 300 seconds. Other iodides, such as zinc iodide, may be used in place of potassium iodide. In addition, other iodides may be used in combination with potassium iodide. Further, a compound other than iodide such as boric acid, zinc vapor, cobalt chloride or the like may be coexisted at the same time. When boric acid is added, it is distinguished from the following boric acid treatment by the characteristic of containing iodine. The syrup may be regarded as a dyeing tank as long as it is contained in an amount of 0.001 parts by weight or more based on 100 parts by weight of water. When a water-soluble dichroic dye is used as the dichroic dye, for example, at a temperature of 20 to 80 ° C, preferably 30 to 70 ° C, the weight ratio is dichroic dye / water = 0.001 The aqueous solution having a concentration of 0.1/100 is subjected to an impregnation treatment for 30 to 600 seconds, preferably 60 to 300 seconds. The aqueous solution of the dichroic dye to be used may further contain a dyeing assistant or the like. For example, an inorganic salt such as sodium sulfate or a surfactant may be contained. The dichroic dye may be used singly or in combination of two or more kinds of dichroic dyes. 18 321533 201020631 As described above, the film can also be stretched in the dyeing tank. The extension is carried out by a method in which the sticks before and after the dyeing tank have a peripheral speed difference or the like. Further, similarly to the swelling treatment step, a widening roller (elevating roller), a spiral roller, a convex roller, a guide, a bending bar, or the like may be provided in the dye bath and/or the bath inlet and outlet. The side acid treatment is carried out by impregnating a polyethylene glycol-based resin film dyed with a dichroic dye in 1 to 10 parts by weight of hydrazine solution containing 100 parts by weight of water. When the dichroic dye is hydrazine, it is preferably 1 to 30 parts by weight of the active compound. Examples of the iodide include potassium iodide, zinc iodide, and the like. Further, a compound other than iodide may be coexisted at the same time, such as chlorinated, cobalt chloride, zirconium chloride, sodium thiosulfate, potassium sulfite, sodium sulfate or the like. The boric acid treatment is carried out in order to achieve water resistance, hue adjustment (preventing a blue sensation, etc.) by cross-linking. When boric acid treatment is carried out in order to achieve water resistance by crosslinking, a crosslinking agent such as glyoxal or glutaraldehyde may be used in addition to or in addition to boric acid. Further, the boric acid treatment for achieving water resistance is sometimes referred to as a water resistance treatment, a crosslinking treatment, and an immobilization treatment. Further, the boric acid treatment for adjusting the hue is sometimes referred to as a complementary color treatment or a re-dye treatment. This boric acid treatment is carried out by appropriately changing the concentration of boric acid and iodide and the temperature of the treatment bath in accordance with the purpose. The boric acid treatment for achieving the hydration-resistant boric acid treatment and the hue adjustment for the hue adjustment is not particularly distinguished, but can be carried out under the following conditions. When the original film is subjected to swelling treatment, dyeing treatment, boric acid treatment, and boric acid treatment for the purpose of achieving water resistance by crosslinking, 321533 19 201020631 is used, and 3 to 10 parts by weight of boric acid, iodide is used with respect to 100 parts by weight of water. The 1 to 20 parts by weight of the boric acid treatment bath is usually carried out at a temperature of from 50 to 70 ° C, preferably from 55 to 65 ° C. The impregnation time is 90 to 300 seconds. Further, when the film which has been previously stretched is subjected to dyeing treatment or boric acid treatment, the temperature of the boric acid treatment bath is usually 50 to 85 ° C, preferably 55 to 80 ° C. After the boric acid treatment for achieving water resistance, a boric acid treatment for achieving hue adjustment can also be performed. For example, when the dichroic dye is iodine, in order to achieve this, a boric acid treatment bath containing 1 to 5 parts by weight of linoleic acid and 3 to 30 parts by weight of iodide with respect to 10 parts by weight of water is used, usually at 10 It is carried out at a temperature of 45 °C. The impregnation time is usually from 3 to 300 seconds, preferably from 10 to 240 seconds. Subsequent boric acid treatment to achieve hue adjustment is generally carried out at a lower boric acid concentration, a higher iodide concentration, and a lower temperature than the boric acid treatment used to achieve water resistance. These boric acid treatments may consist of a plurality of steps, usually carried out in two to five steps. In this case, the aqueous solution @ composition and temperature of each of the boric acid treatment tanks used are in the above range, and may be the same or different. The boric acid treatment for achieving the hydration resistance and the boric acid treatment for achieving the hue adjustment may be carried out in a plurality of steps. Further, even in the boric acid treatment step, the stretching of the film can be carried out in the same manner as the dyeing treatment step. 5倍。 The cumulative stretch ratio is 4 to 7 times, preferably from 4.5 to 6. 5 times. Here, the term "accumulated stretch ratio" means the length of the length direction reference length of the original film on the film after completion of all the stretching processes, for example, the original film film is originally 20 321 533 201020631. When the film after the stretching treatment is 5 m, the cumulative stretching ratio at this time is 5 times. After the boric acid treatment, a water washing treatment is performed. The water-washing treatment is carried out by dipping the polyvinyl alcohol-based resin film treated with boric acid in water for the purpose of obtaining water resistance and/or hue adjustment, or by spraying with water or by spraying and spraying. The temperature of the water in the water washing treatment is usually 2 to 40 ° C, and the impregnation time is 2 to 120 seconds. Here, in each step after the stretching process, the tension of the film may be substantially controlled so that the tension of the film is substantially constant. Specifically, when the stretching is completed in the dyeing treatment step, the tension is controlled in the subsequent boric acid treatment step and the water washing treatment step. When the stretching is completed in the step before the dyeing treatment step, the tension control is carried out in the step including the dyeing treatment step and the boric acid treatment step. When the boric acid treatment step is constituted by a plurality of boric acid treatment steps, it is preferred to extend the film in the boric acid treatment step initially or from the first to the second stage, and the boric acid treatment step which has been subjected to the elongation treatment Performing tension control in each step from the next boric acid treatment step to the water washing step; or extending the foregoing film in the boric acid treatment step from the first to the third stage, and a boric acid under the boric acid treatment step which has been subjected to the elongation treatment Tension control is performed in each step from the treatment step to the water washing step. Industrially, it is preferred to extend the film in the boric acid treatment step initially or from the first to the second stage, and each of the boric acid treatment step to the water washing step under the boric acid treatment step in which the elongation treatment has been carried out Tension control is carried out in the step. Further, after the boric acid treatment, when the above iodide treatment or zinc treatment is carried out, 21 321 533 201020631 may also be subjected to tension control in these steps. For the guide roll for regulating the tension and controlling the conveying direction of the film, a rubber roller or a stainless steel button sponge rubber roller P can be used for the rubber roller to be constructed by a surface or the like. The Jis Shore C scale measured according to the test method of IIS K 63G1 is 6〇 to 9〇 (more preferably 7〇 to 8/1 is preferred. For the grinding roller, the surface of the grinding machine is made by SUS3()4, su^6 ©, etc. (4) and the film thickness is achieved. The surface of the grinding wheel is Jis B G6G1 (Table Feng Cai) Partial

It is preferable that the Q ^ interval S is expressed as about 0.2^· QS. The JIS Shaw C scale measured by the test method of JIS κ _ is 0.5 to 60 degrees (more preferably 25 to 5 degrees), and the density is 〇·4,0. 6g/V (more preferably 42. 42 to 〇%» is preferred ^ The tension system in each step from the swelling treatment to the water washing treatment can be the same, different, and the tension of the film in the tension regulation There is no special limit, in the range of the parent unit width, it is suitably set to 150 to 2000 N/m, preferably in the range of 15 GGN/m. When the tension is lower than i5〇N/m, the film is prone to wrinkles. On the one hand, when the tension exceeds 2000 N/m, problems such as film rupture or bearing wear may result in lower life. In addition, the tension per unit width is detected by the film width and tension near the entrance of the step. In addition, when the tension adjustment is performed, although there is inevitably a slight extension/contraction situation, 'in the present invention, 'this is not included in the extension process. Finally, dry treatment is carried out. Drying place 22 3215 33 201020631 Although it is better to ride in the most stage of Wei Li, the value is limited from the limit of equipment, etc., usually in the 2 to 3 stage. When the 2 stage is used, the tension of the front section is preferably set to _ to 15_ / m after the section f is preferably set to l_N / m lang. If the tension is too large 'the rupture of the film will become more ' ^ too small' will produce more sensitive lines, and more In addition, the drying temperature of the preceding stage is preferably set to 3 〇 to 9 〇. (: The range, the drying temperature of the latter stage is preferably set to 4 〇 to just the range of e. If the temperature is too high ' The rupture of the film will increase and the optical properties will decrease. The temperature will be too low, and the secret line will become more. The drying process temperature can be set to, for example, 6 G to 6 GG seconds. The drying time of each stage can be the same or not. ^. If the time is too long, then it is not good in terms of productivity. If the time is too short, it will be insufficient and not good. Dry so-called "single-axial stretching of the polyvinyl alcohol-based resin film, dyeing treatment of dichroic pigments and A polarizing film is obtained by treatment with boric acid. The thickness of the film is usually in the range of 5 to 40. © (2) For The polarizing film is provided with a characteristic that satisfies the characteristics of the formulas (2) and (3). The polarizing film used in the polarizing plate of the present invention has the characteristics shown by the following formula (2). The polarizing film having the present characteristics is made by = . Temple is obtained under a specific environment. That is, 'the polarizing film must be kept in a state where the shrinkage of at least the flow direction (absorption axis direction) is suppressed, and it is maintained in an environment of high temperature and high humidity. &quot; ', , ' With the uniaxial extension, with respect to the suppression bias t (ScE(550) + ScECeOO)) / ^ 2] ^ 30, the polarizing film produced in the state where the shrinkage of the polarizing film is not suppressed is greatly contracted and lost. Polarizing property 321533 23 201020631 The state in which the light film is shrunk is a method in which the film is held in a high-temperature and high-humidity bath while maintaining the tension of the polarizing film, and the film is laminated on both sides of the polarizing film having a high moisture content and is polarized. A method of imparting high temperature in a state where the moisture of the film is high. The tension in the former is from 15xl04N/m2 to 1500x104N/m2, more preferably from 150xl04N/m2 to 1200xl04N/m2. If it is less than 15 x 104 N/m2, the polarizing performance is liable to be lost, and if it is 1500 x 10 N/m2 or more, it is liable to be broken. In the latter case, shrinkage of the polarizing film is suppressed by laminating a film such as a transparent protective film described later on both sides of the polarizing film. In addition, since the polarizing film is placed under high temperature and high humidity only by heating the laminated polarizing plate, it is not necessary to provide a high temperature and high humidity groove when the polarizing film is maintained in a high temperature and high humidity environment. This method is simple and preferred. In the so-called high temperature and high humidity environment, the temperature is 40 ° C to 90 ° C and the humidity is 50% to 95% RH. The preferred range refers to the temperature of 60 ° C to 80 ° C and the humidity of 60% to 90%. RH environment. When the temperature is less than 40 ° C or the humidity is less than 50% RH, since the temperature and humidity are insufficient, it is difficult to obtain the characteristics described in the formula (3). When the temperature is 90 ° C or more, the polarizing film is significantly deteriorated and is likely to be de-bluened, and when the humidity is 95% RH or more, it is easily dewred. The exposure time in a high temperature and high humidity environment is 10 seconds to 1200 seconds, preferably 20 seconds to 600 seconds. If the time is short, sufficient processing effect cannot be obtained. If it is too long, the polarizing film will be significantly deteriorated and it is prone to de-bluening, which is not preferable. In the method of laminating the film on both sides of the polarizing film and imparting high temperature in the state of the polarizing film moisture 24 321 533 201020631 :, since the temperature and humidity of the exposed film are too small, the phase is exposed to 4 70 C or more. Preferably, the hunger is 100C or less, preferably 9 (rc or less. Normally == 2, the polarizing film will be: ❹, the treatment is within 40 seconds after the bonding, and more preferably, The high temperature is applied within 20 seconds. It is difficult to obtain the treatment effect after the second temperature is applied to the high temperature. The time for giving 鬲k is 10 seconds to 1200 seconds, and the time is shorter than the helmet. It is not possible to obtain sufficient treatment effect / ^ 0 length = polarized film will be significantly degraded and prone to bluing and more than right heart = = = rate ... upper, preferably partial eramide first, even if the film is laminated It is difficult to obtain a treatment effect on the double-sided tempering of the eight-rate **. If the waterjet-direction is applied, the film will be embossed when it is laminated on both sides of the polarizing film, which is less preferred. The upper limit of the moisture content is usually It is 20% or less, more preferably 15% or less. The ruler is the moisture content of the polarizing film. Based on the value measured by Fujiw〇rk (infrared), the infrared undercut rate of 50 IM-3SCV MODEL-1900 (L) is obtained by the following formula: Moisture rate = (1 / 28) * ( 1. 2145 * Measured value 941. 662) In addition, this formula is the water content of the polarizing film with different moisture content, and the water content obtained by changing the water content before and after heat treatment at 105 °C for 1 hour. 321533 25 201020631 The relationship between the values obtained in a straight line relationship. The polarizing film having the moisture content in the above preferred range can be obtained by adjusting the drying temperature and drying time of, for example, the bias film, and the low water=rate polarizing film can be used. By setting the temperature of the drying oven to be lower and/or the drying time to be shorter, the high moisture rate polarizing thinner can be set by the drying furnace to be higher, and/or the drying time is set to In the present invention, in order to obtain the performance of the formula (3), in a method in which a thin layer is deposited on both sides of the polarizing film and the temperature of the polarizing film is high, the temperature is given. The combination of the above temperature, time and moisture rate is very important. ❹ After drying Further, curing is carried out at room temperature or a temperature slightly higher than room temperature, for example, at a temperature of about 20 to 5 Torr: about 12 to 600 hours. The temperature at the time of aging is generally set to be lower than when drying. (3) A film such as a transparent protective film for a laminate of a polarizing film. A method of laminating a film such as a transparent protective film on both sides of a polarizing film is performed by an adhesive layer or a direct laminated film. When the single side of the polarizing film is used, it is difficult to maintain the high-humidity film in a high-humidity environment even if a high temperature is applied thereafter, which is not preferable. Regarding the laminate of the film, the polarizing film and the film may be bonded to the film at the same time or simultaneously on both sides using a roll or the like. From the viewpoint of manufacturing efficiency, it is preferable to apply both sides at the same time. The bonding temperature is usually in the range of about 15 to 3 〇 C. When the layer is laminated by the adhesive layer, the adhesive is uniformly applied to the surface of the polarizing film and/or the transparent protective film, and the other film is laminated on the coated surface, and is attached by a roller or the like. And 321533 26 201020631 drying method, etc. Coating at temperature. Usually, the adhesive is at 15 to 40 ° C after the preparation, and a solvent-based adhesive, an organic binder, a solventless adhesive or the like can be used as the solvent. Water-soluble: = er polyvinyl alcohol-based resin aqueous solution, water-based two-component ethane boring solution (emulsi〇n) followed by six binders, such as a two-component amine ester system, followed by _, such as - (tetra) amine An adhesive, an epoxy-based adhesive, or the like. Polyethylene = (4) 'In the resin used as an adhesive, 'in addition to the B-homopolymer obtained by the polymerization of the homopolymer of ethyl acetate vinegar A vinyl alcohol-based copolymer obtained by treating a copolymer of a copolymer with another monomer copolymerized with it, and further modifying the polyethylenic alcohol-based polymerization by partially modifying the oxime Things and so on. A multi-secret, water-soluble epoxy compound, a trimeric amide compound, an oxidizing compound, a zinc compound or the like may be added as an additive to the adhesive. When such a water-based adhesive is used, the adhesive layer obtained therefrom is usually i-. I3. The cross section is observed using a usual optical microscope, and the adhesive layer is not actually observed. As the adhesive, a photocurable adhesive can also be used. Examples of the photocurable adhesive include a radical polymerization type initiator and an epoxy resin, an acrylic resin, an oxetane resin, an amine ester resin, a polyvinyl alcohol resin, and the like. Or a cationic polymerization type initiator, wherein a cationic polymerization type initiator is preferably added to a mixture of an alicyclic ring-rolled resin and a ring 321533 27 201020631 oxy-resin having no alicyclic structure. . When a polarizing film is bonded to a film bonded thereto by using a photocurable adhesive, the photohardenable adhesive is cured by irradiation of an active energy ray after bonding. The light source of the active energy ray is not particularly limited, and is preferably an active energy ray having a light-emitting distribution at a wavelength of 400 nm or less. Specifically, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, a chemical lamp, and a black light (5) aek Light 丨qing), microwave-excited mercury lamps, metal lignin lamps, etc. are applicable. The light irradiation intensity of the photocurable adhesive is appropriately determined depending on the composition of the photocurable adhesive, and y is not particularly limited, but the irradiation intensity in a wavelength region effective for activation of the polymerization initiator is 1. 1 to 6000 mW//cm 2 is preferred. When the irradiation intensity is 0·lmW/cm2 or more, the reaction time does not become too long, and when it is 6000 mW/cm2 or less, heat generated from the light source and heat generated by curing of the photocurable adhesive are less likely to occur. The resulting yellowing of the epoxy resin or deterioration of the polarizing film. The light irradiation time of the photocurable adhesive is controlled by a photocurable adhesive which is to be cured, and is not particularly limited, but is preferably set to a cumulative amount of light expressed by the product of the irradiation intensity and the irradiation time. It is 10 to l〇〇〇〇mJ/cm2. When the cumulative light amount for the photocurable adhesive is 10 mJ/cm 2 or more, the active species derived from the polymerization initiator can be produced in a sufficient amount to make the hardening reaction more sure, when it is 1 〇〇〇〇 mJ// When the thickness is less than or equal to cm2, the irradiation time does not become too long, and good productivity can be maintained. Further, the thickness of the adhesive layer after the irradiation of the active energy ray is usually 〇1 to 5/zm, preferably 〇〇1/1/m or more, and more preferably 2 or less, more preferably 1 # m below. 321533 28 201020631 When the photocurable adhesive is cured by irradiation of an active energy ray, it is preferred to be hardened without lowering the functions of the polarizing film, the transmissivity, and the color of the polarizing plate. When the film is laminated on both sides of the polarizing film, if the film is laminated by the adhesive layer, the film is preferably a transparent protective film. Examples of the transparent protective film include a cycloolefin resin film, a cellulose acetate resin film, a polyethylene terephthalate or a polyethylene terephthalate, and a polybutylene terephthalate. A film which has been widely used in the past, such as a polyester resin film such as an ester, a polycarbonate resin film, an acrylic resin film, or a polypropylene film.

As the cycloolefin-based resin, a commercially available product such as T〇paS (manufactured by Ticona Co., Ltd.), ART0NCJSR (manufactured by the company), ZE0N0R (manufactured by Japan ze〇n Co., Ltd.), and ΖΕ0ΝΕΧ (Japan ZE〇N (share)) can be used. In the case of forming a film by forming a film of such a cycloolefin-based resin, it is preferable to use a known method such as a solvent washing method or a melt-casting method. In addition, it is also possible to use, for example, S-SINAC Sekisui Chemical Co., Ltd., SCA4〇 (made by Sekisui Chemical Co., Ltd.), ZE_R, film ((), pTES, etc. A commercially available product of a film. The cycloolefin-based resin film may be uniaxially stretched or biaxially stretched. By stretching, an arbitrary phase and a difference can be imparted to the cycloolefin-based resin film. The film is continuously carried out while being pulled out from the roll, and is extended in the direction of the roll, in the direction perpendicular to the direction of the roll, or in both directions in the heating furnace. The temperature of the furnace is usually 321533 29 The cyclic olefin-based resin film is used in the range of from 0.1 to 6 times, preferably from 3.5 to 5. In the case of the extension, the direction of extension is tolerant 'but generally the flow direction with respect to the film is 〇., 沾., 9 〇. The direction of extension is (the phase difference characteristic of the film of Γ is completely uniaxial, 45. 9〇. Phase difference characteristics This feature will H has a weak view of San ring,: Perspective of two opposed, but insofar as the display device based on liquid crystal applicable

(4) (4) of the 2 polarizing plates can be selected. The phase difference value is often used for = is called Λ / 4, Μ, etc. If λ / 4 is often the phase difference range of (10) to ΠΟ ηηη, if it is λ/2 difference range. Bay] is often 20. Phase to 300 nm When the cycloolefin-based resin film is in a roll state, since the film tends to have a ratio of (b) to each other, the film is usually bonded to the film to form a roll. In addition, since the cycloolefin-based resin film generally has a good surface activity, it is necessary to carry out the surface with a polarizing thin film.

^ Surface treatment such as treatment, corona treatment, ultraviolet irradiation treatment, flame (η·) treatment, and chemical treatment is preferred. Among them, it is suitable to perform treatment and corona treatment in a stomach. It can be used as a W cellulose (tetra) fat as a transparent film, or a part or complete acetic acid acetate of cellulose, and examples thereof include triethyl fluorenyl cellulose, divinyl cellulose, cellulose acetate, and vinegar vinegar. Wait. As the film of the cellulose vinegar resin, a commercially available product such as Fujitac TD80 (manufactured by Shiki Film Co., Ltd.), Fujitac TD8 〇 UF (manufactured by 321533 30 201020631 film), Fujitac TD80UZ (Fujitac TD80UZ) can be used. Fuji Film Co., Ltd., KC8UX2M (Konica Minolta 0ρΐ〇), KC4UY (Konica)

Minolta 0pto (share) system, etc. In addition, a cellulose acetate-based resin film to which a phase difference property is imparted may be used, and a commercial product of the cellulose acetate-based resin film to which the phase difference property is imparted may be, for example, WV BZ 438 (manufactured by Fuji Film Co., Ltd.). , (Konica Minolta Opto (share) system) and so on. Cellulose acetate can be referred to as ethyl cellulose or cellulose acetate. In particular, when a layered film is laminated with a polarizing film using a water-based adhesive, the saponification treatment is carried out in order to improve the adhesion to the polarizing film. The saponification treatment may be carried out by dipping in an alkaline aqueous solution such as sodium hydroxide or potassium oxyhydroxide. The surface of the cycloolefin resin film or the cellulose acetate resin film may be subjected to surface treatment such as antiglare treatment, hard coat treatment, antistatic treatment, and antireflection treatment depending on the application. Further, in order to improve the viewing angle characteristics, a liquid crystal layer or the like may be formed. When the film is laminated on both sides of the polarizing film, it is preferred that the film is a resin film having a low moisture permeability on at least one side. If the moisture permeability is low, it is easy to maintain the polarizing film in a high humidity environment when laminating and imparting high temperature. The preferred moisture permeability is 4 〇〇 (g/m 2 · 24 hr) or less in 4 (TC, 90% RH environment, more preferably 300 g or less, particularly preferably 1 〇〇 § or less, and most preferably 50 g or less. When the transparent protective film is in a roll state, since the thin molds tend to agglomerate with each other, it is usually used to perform convex processing on the end of the roll, or to insert a strip in the end. (ribbon), or a roll made of a film made of anti-vine. The thickness of the transparent protective film is preferably thinner, but if it is too thin, the strength is lowered and the workability is poor. On the other hand, if it is too thick, there is a problem that the transparency is lowered or the aging time required after the lamination is lengthened. Therefore, the appropriate thickness of the transparent protective film is, for example, 5 to 2 Å/m, preferably 10 to 150 # m, more preferably 20 to loo # m.

When the film is directly laminated on both sides of the polarizing film, the film is preferably a peelable protective film. The pellicle film is peeled off at a stage where it is no longer necessary, for example, when an adhesive layer is formed on the surface of the polarizing film G of the polarizing plate. The peeling force between the protective film and the polarizing film is 〇1 to 5N/25 mm, preferably 0.01 to 2N/25 nm, more preferably 0 01 to 〇 5 N/25 mm. When the peeling force is less than 〇. 01N/25, since the adhesion between the polarizing film and the protective film is small, partial peeling of the protective film may occur. In addition,

When the peeling force exceeds 5 N/25 Å, it is difficult to peel off the protective film from the polarizing film. Therefore, it is a poor D. The material of the protective film is §, and it is suitable to use a polyethylene which is easy to handle and ensures a certain degree of transparency. A resin, a polypropylene resin, a polystyrene resin, a polyethylene terephthalate resin, or the like can be used as a single or multiple film formed by protecting one or more of these resins. film. In the case of such a protective film, for example, sunytect (sold by Sun_A Chemical Co., Ltd.) having an adhesive layer formed on the surface of the polyethylene resin film, and a surface of the polyethylene terephthalate resin film may be mentioned. Mastack (made by Fujimori Industrial Co., Ltd.) having an adhesive layer formed on the surface of a polyethylene terephthalate resin film of 32 321533 201020631 layer, E-mask (made by Nitto Denko Co., Ltd.) Commercial products. Among them, the protective film which is self-adhesive for the polarizing_adhesive_adhesive is easy to use because it does not need to protect the adhesive layer on the surface of the protective film. The commercially available product of the self-adhesive resin film which exhibits a suitable peeling force for the polarizing film is, for example, Toretec (manufactured by Toray Industries, Inc.) which is made of a polyethylene resin. Ο Also, the transparent protective film is preferably a defect such as a fisheye. If there is a defect, the shape may be transferred to the polarizing film to become a defect of the polarizing film. In the polarizing plate manufactured as described above, an optical film having an optical function other than the polarizing plate may be laminated on the protective film surface or the adhesive layer of the polarizing plate. Examples of the optical film include, for example, a liquid crystal compound coated on a surface of a substrate and an optical compensation film oriented, a polarized polarizing film that transmits a polarized light and reflects a polarized light having a property opposite thereto, and a polycarbonic acid. A retardation film made of an ester resin, a retardation film made of a cyclic polyolefin resin, a film having an anti-glare function having an uneven shape on the surface, a film having a surface anti-reflection function, and a surface having a reflection A reflective film of function, a transflective film having both a reflective function and a transmissive function. A commercially available product which is equivalent to an optical compensation film which is coated with a liquid crystal compound on the surface of the substrate, and which is oriented, may be, for example, a WV film (manufactured by Fuji Film Co., Ltd.) or an NH film (manufactured by Shin Sakamoto Co., Ltd.). And take a film (New Sakamoto Oil Co., Ltd.) and so on. It is a commercial product that transmits a certain polarized light and reflects the opposite property. 33 321533 201020631 Reflective polarizing film is exemplified by DBEJ? (3 Μ company, available in Japan by Sumitomo 3Μ) ), af (made by 3M company, available from Sumitomo 3M (share) in Japan), etc. In addition, as a commercial product corresponding to the retardation film which consists of a cyclic-type polyolefin resin, the Artqn film (made by JSR), S_SINA (made by Sekisui Chemical Industry Co., Ltd.), zeqnor film ( (shares) 0PTES system) and so on. When these other optical films are provided on the protective film side of the polarizing plate, they are usually laminated by an adhesive. The dispensing agent at this time may be the same as those described above, but the storage elastic modulus (st〇rage ❹ elastic modulus) may not be so large. Further, when another optical film is provided on the side of the adhesive layer of the above polarizing plate, the optical film is followed by the adhesive layer. At this time, an adhesive layer for bonding to the liquid crystal cell is generally provided on the outer side of the optical film. A θ-shaped bear attached to a manufacturing method according to the present invention and having a large roll material or a sheet material, in order to obtain a polarizing plate having a desired shape and a transmission axis, and a sharp knife The knife cutting tool performs cutting ((cut) chip cut). Therefore, the polarizing plate chip obtained by the dicing is produced in a state where the polarizing film is exposed to the outside at the outer peripheral end portion. When the polarizing plate of this state is subjected to a long-term test such as a thermal shock test, a polarizing plate which is used in comparison with a polarizing plate which is generally used, and a polarizing film which is protected by a cellulose resin film or the like on both sides of the polarizing film, There is a tendency to easily cause problems such as peeling or cracking. In order to avoid such a problem, the polarizing plate piece obtained by the present invention is preferably cut continuously by the outer peripheral end surface in accordance with a flying cutting method (Hy 321533 34 201020631 cutting method) or the like. (Adhesion of polarizing plate to liquid crystal cell) The polarizing plate manufactured by the above manufacturing method is bonded to a liquid crystal cell of a liquid crystal display device by an adhesive. Such an adhesive layer is generally adhered to various adhesives conventionally used for laminating a liquid crystal cell and a polarizing plate, for example, an acrylic, a rubber, an amine, a silicone, a polyvinyl ether or the like. The agent formed by the agent. , and ❹ ' ' can also use energy line hardening type, thermosetting type of adhesive, which is excellent in transparency, weatherability, heat resistance and other two excellent acid system 为 = based polymer (base叩The 1 lactic acid-based adhesive is not directly available when the adhesive layer is directly formed on the surface of the polarizing film. Butyl olefinate, ethyl (meth) acrylate, 4 series σ σ (methyl) propyl) 2-ethylhexyl acrylate (methyl W) acrylic acid, etc. Two or more of these may be used (曱仏@基酸酸基基基基基和polymer. Further, such a base polymerization = green acid vinegar ^ copolymerization base polar monomer may be exemplified by (meth) internal combustion The middle group is copolymerized with a polar monomer. 酉 、, (meth)acrylic acid 酉 、, (methyl) propyl phthalocyanine 2, carbene enelate, Ν-dimethylamino group, riding A monomer having a functional group such as a lytic base such as acrylamide or a (meth) group having a slow group, a light group, a guanamine group or an amine group, and a glycidyl acrylate. Six of these acid-based adhesives can of course be used alone, but usually the parental agent is used in combination. The parent-linked agent can be exemplified by a metal salt which exhibits a divalent or multivalent value, and a carboxylic acid metal salt of 321533 35 201020631 and a carboxyl group; a polyamine compound and a guanamine bond with a carboxyl group; Or a polyol compound, which forms an ester bond with a carboxyl group; a polyisocyanate compound, and a guanamine bond with a carboxyl group. Among them, polyisocyanate compounds are widely used as organic crosslinking agents. The energy ray-curable adhesive refers to a property which is hardened by irradiation with an energy ray such as an ultraviolet ray or an electron beam, and has an adhesive property even before being irradiated with an energy ray, and is adhered to an adherend such as a film. An adhesive that is irradiated with an energy ray and hardened to adjust the nature of the adhesion. Energy line hardening Types of adhesives are particularly preferred for use with UV-curable adhesives. The energy ray-hardening adhesive generally has an acrylic adhesive and an energy ray polymerizable compound as a main component. A crosslinking agent is usually additionally provided, and a photopolymerization initiator or a photosensitizer may be formulated as needed. In the adhesive composition, in addition to the above-mentioned base polymer and cross-linking agent, in order to adjust the adhesion and cohesive force of the adhesive,

Viscosity, modulus of elasticity, glass transition temperature, etc., and compound such as resin of natural or Q composition, resin for imparting adhesion, antioxidant, ultraviolet absorber, dye, pigment, antifoaming agent, antiseptic Suitable additives such as photopolymerization initiators. The microparticles may be further contained to form an adhesive layer which exhibits light scattering properties. The thickness of the adhesive layer is preferably from 1 to 40/m. However, in order to obtain the thin polarizing plate for the purpose of the present invention, it is thinner in a range that does not impair the properties of workability and durability. Preferably, it is preferably from 3 to 25/zm from the viewpoint of maintaining good workability and suppressing dimensional change of the polarizer. Sticky 36 321533 201020631 If the coating layer is too thin, the adhesive will decrease. If it is too thick, the adhesive will easily overflow and other problems. The adhesive directly formed on the surface of the polarizing film is as described above, and the storage elastic modulus in the temperature range of 23 to 80 C is preferably ο υ to up : . The storage elastic modulus of the pressure-sensitive adhesive used in the conventional image display device or the optical film used therein is at most about 1 MPa, and the storage elasticity of the adhesive used in the present invention is better than this. The modulus is high ^ ❹〇 · 15 to IMPa. Further, the storage elastic modulus can be measured by using a commercially available adhesiveness measuring device such as DYNAMIC ANALYZER RDA IUREOMETRIC. Further, in the method for producing a polarizing plate of the present invention, the method of applying the adhesive layer to the polarizing film is not particularly limited, and a solution containing each component including the above-mentioned base polymer may be applied to the polarizing film. Drying = After forming an adhesive layer, a layer obtained by performing a demolding treatment such as polysulfide is obtained by laminating, and right, mixed, and transferred to a polarizing thin: At the time of the film, at least one of the polarizing film and the adhesive layer may be subjected to a close treatment such as corona treatment or the like as needed. Further, the surface of the adhesive layer is usually detached by the release treatment, and the polarizing plate is attached to the liquid crystal cell or other optical film to peel off the release film. (Examples) Hereinafter, the present invention is not limited by the examples, and the comparative examples are given to specifically describe the present invention. 321533 37 201020631 [Example 1] (Preparation of polarizing film) A polyvinyl alcohol film having an average degree of polymerization of about 2400, a degree of saponification of 99.9 mol% or more and a thickness of 75 quotient was uniaxially stretched to about 5 times in a dry manner. And after being immersed in 60% pure water for 1 minute while maintaining tension, the weight ratio of iodine/potassium iodide/water is 28 in an aqueous solution of 〇.丨/5/iOO.浸 Dip for 60 seconds. Then, it was immersed at 72 ° C for 300 seconds in an aqueous solution of potassium bromide/boric acid/water in a weight ratio of 1 〇 5 / 7.5. Then, after washing with pure water of 1 ° C for 5 seconds, the moisture content was 10.9% by drying at 60 ° C for 75 seconds and then drying at 75 ° C for 30 seconds while maintaining a tension of 400 N. The adsorption is oriented with a polarizing film of iodine. (Preparation of an adhesive agent) Further, a carboxyl group-modified polyvinyl alcohol is dissolved in 100 parts by weight of water. (Kuraray p〇vai KL318 (manufactured by Kuraray Co., Ltd.) 3 parts by weight, water-soluble polyamide resin (Sumirez Resin) 650 (manufactured by CHEMTEX Co., Ltd.) (aqueous solution having a solid concentration of 30%) 1.5 parts by weight, prepared into a water-based adhesive (A) containing polyethyl hydrazine dilute oxime resin as a main component. The base-modified polyvinyl alcohol and the water-soluble polyamide resin are respectively 2 parts by weight and 1 part by weight of the adhesive (B). (Production of polarizing plate) On one side of the previously obtained polarizing film, the above-mentioned Next, the film (KC4UY 'Konica Minolta Opto (manufactured by Konica Minolta Opto Co., Ltd.) made of triethyl fluorenyl cellulose which has been subjected to saponification treatment is lightly adhered by the milk, and On the other hand, a phase difference film (ZE0N0R film ZD14-141158-A1340COPTES (manufactured by Nikon) film) which was previously subjected to corona treatment of 321533 38 201020631 by the above-mentioned adhesive (B), thickness: 32/zm) is bonded by a roll. The tension was maintained at 430 N / m, and the film was bonded at room temperature. After 5 seconds, the film was continuously dried at 60 ° C for 11 seconds, at 80 ° C for 141 seconds, and at 70 ° C for 93 seconds. After drying, a polarizing plate was obtained. [Example 2] (Production of polarizing film) ® The same operation as in Example 1 was carried out except that the film was dried at 40 ° C for 60 seconds and at 50 ° C for 25 seconds. A polarizing film having a moisture content of 13.9% was obtained. (Preparation of a polarizing plate) In addition to maintaining the tension of the laminate at 430 N/m, the film was bonded at room temperature, and after 4 seconds passed, The film was continuously dried at 60 ° C for 9 seconds, at 80 ° C for 113 seconds, and at 70 ° C for 75 seconds, and the same operation as in Example 1 was carried out to obtain a polarizing plate. [Example 3] (Preparation of a polarizing film) The same operation as in Example 1 was carried out except that the film was dried at 40 ° C for 60 seconds at 50 ° C for 25 seconds to obtain a polarizing film having a moisture content of 13.9%. Production of polarizing plate) In addition to maintaining the tension of the laminate at 430 N/m, it is bonded at room temperature, after 4 seconds, The same operation as in Example 1 was carried out except that the drying was carried out at 90 ° C for 9 seconds, at 90 39 321 533 201020631 ° C for 39 seconds, at 80 ° C for 74 seconds, and at 70 ° C for 75 seconds. 7%的偏光膜 The polarizing film having a moisture content of 8.7% was obtained in the same manner as in Example 1 except that the polarizing film was obtained in the same manner as in Example 1 except that the film was dried at 90 ° C for 106 seconds. . (Production of polarizing plate) The bonding was carried out at room temperature while maintaining the tension of the composition at 430 N/m, and after 4 seconds, it was sequentially applied at 50 ° C for 10 seconds at 65 ° C. The same operation as in Example 1 was carried out for 43 seconds at 83 ° C for 83 seconds and at 70 ° C for 84 seconds to obtain a polarizing plate. .

[Comparative Example 2] (Preparation of a polarizing film) The same operation as in Example 1 was carried out to obtain a polarizing film having a moisture content of 10.6%. (Production of polarizing plate) The bonding was carried out at room temperature while maintaining the tension of the composition at 430 N/m, and after 4 seconds, it was sequentially applied at 50 ° C for 10 seconds at 65 ° C. The polarizing plate was obtained in the same manner as in Example 1 except that the drying was continued for 167 seconds at 80 ° C for 43 seconds. [Comparative Example 3] (Production of polarizing film) 40 321533 201020631 Other than the 7% polarizing film of Example 1. In addition to drying at 90 ° C for 106 seconds to perform the same operation, the moisture content was obtained as '8 (manufactured by polarizing plate) · and t was added - while the tension of the laminate was maintained at the leak, The room occupies 'after 4 seconds' in sequence. The second operation was carried out in the same manner as in Example 1 except that the second operation was carried out in the same manner as in the first embodiment. [Measurement of Sgr of Each Polarizing Plate] (4) For the polarizing plates obtained in the above Examples 1 to 3 and Comparative Examples 1 to 3, the phase difference film was peeled off so as to have substantially no phase difference. In the state of the acetonitrile-based cellulose film, the SCR of each polarizing plate having a wavelength of m, 55 () nm, and 600 nm was measured using a spectrophotometer (manufactured by JASCO Corporation) = photometric material number: V7_. The results are shown in Table 2. (Comparative evaluation of liquid crystal display device) 定『定=Light emission spectrum of hand, Guardian (not 3 polarizer state) composed of white LED backlight and _LCD unit, and will obtain "and" Shown in Table 1. The B position and Rmax of the above mobile phone module are similar to those of the above formula (4). In the double-sided bonding of the liquid crystal cell of the module, the polarizing plate produced in the third embodiment and the comparative example 1 is combined, and the liquid crystal surface of the device (mobile phone) incorporating the module is compared with the T0PC0N (share) ) = light emission 3t (siHJLl) for 敎. The results are shown in Table 2. The liquid crystal display device using the polarizing plates of the examples 1 to 3 obtained a very good pair. However, the liquid crystal display I of the polarizing plate of the comparative example obtained only a lower contrast than the example of the implementation of 321533 41 201020631. [Table 1 ]

Bmax(nm) Rmax(nm) 550-Bmax(nm) Rmax-550(nm) LED backlight + liquid crystal unit 450 600 100 50 [Table 2] ^ ΐ m 〇CO CO «Ν1 CO T-4 CO CO 卜 LO ί 1 \ i-1 o CO 'SX os CO + 〇〇σ> CO LO 呀 00 CO 呀 CO 05 〇〇Ο 05 CO r — Η (NI ο LTD LT5 卜 (Nl CO LO 呀 OJ CNI m LO CO CD 〇 CO '«w/ CO 〇〇03 卜CO 〇 CO CO ¢33⁄4 OO σ&gt; Inch CO (Μ Q CO LO οα o CO LO CO CNJ /-N c? LT3 ΙΛ LO τ-Ή 〇0 〇00 呀CO CO ΙΛ ΙΛ 〇〇 〇〇 Cs] 〇〇 OO 05 Q in 卜 LO but CO T-&lt; CO 寸 呀 O LO 呀 ae oo 〇〇 CO 〇 〇 LO CO CO 05 〇〇0〇m OO OO o CO o Csl Cr&gt; σ» ΙΛ ς〇CNl o CO LO CSi Cs] 〇ί—4 —«Η CO CT&gt;&lt;&gt;3 CN3 03 CNI Cd r-H 呀呀03 CO &lt;ΝΙ CNJ CO t&gt;- in CO 05 S σ» CT5 03⁄4 05 05 05 03⁄4 σ&gt; 05 03⁄4 03⁄4 CS3 CO CO ¥ CO -Ο JO i2 42 321533 201020631 (Industrial Applicability) The polarizing plate of the present invention, even if the polarizing plate alone has a visual sensitivity school Positive polarization (Py) or visual sensitivity correction single transmittance (Ty) is the same as that of the conventional polarizing plate, when used in a liquid crystal display device having a backlight and a light-emitting wavelength characteristic of a liquid crystal cell (color filter) In the case of using a conventional polarizing plate, the contrast of the surface of the liquid crystal display device can be greatly increased. [Simplified description of the drawing] Fig. 1 shows the light emission measured by the CCFL type backlight mounted color filter. Fig. 2 is a graph showing an example of an emission spectrum measured by mounting a color filter on an LED type backlight. Fig. 3 is a graph showing an example of a visual sensitivity correction curve. Fig. 4 is a graph showing the orthogonal transmittance spectrum of a polarizing film used in a conventional polarizing plate. Fig. 5 is a graph showing the positive φ cross-transmittance spectrum of the polarizing film used in the deflecting plate of the present invention. Fig. 6 is a graph showing a single body contrast of a polarizing film of the same polarizing film as in Fig. 4. Fig. 7 is a graph showing a single body contrast of a polarizing film of the same polarizing film as in Fig. 5. [Main component symbol description] None 0 43 321533

Claims (1)

201020631 VII. Patent application scope: 1. A polarizing plate comprising a polarizing film which adsorbs a polarizing film oriented with a dichroic dye in a polyvinyl alcohol-based resin film, wherein the polarizing film has the following formula (1) The defined wavelength and the polarizing film monomer comparison (SCR(λ)) in nm satisfy the relationship of the following formulas (2) and (3), S〇R (also > a=T&quot; (λ) /τ丄(Α) ...(1> (here, Τ// (λ) «Ο, 5Χ [Tp CA) 2+Tc (Λ) 2] /1 0 0 T丄(λ> =Tp (λ&gt; XTC ( A&gt; /100 Τρ( λ ) is the transmittance (%) of the polarizing film measured by the relationship between the linear polarization of the incident wavelength and nm and the Parallel Nicol, and Tc (again) is incident. The wavelength; the transmittance (%) of the polarizing film measured by the linear polarized light of I(10) and the relationship between the crossed Nicols (qrossed Nicol), which are the measured values obtained by polarized ultraviolet visible absorption spectrometry with a spectrophotometer. ) [(Scr(550) + Scr(600))/2]^ 30, 000 ...(2) 3, 000^Scr(450)&lt; 30, 000 ...(3). 2. If applying Polarized light of item 1 of the patent scope In the case where the cellulose acetate-based resin film is laminated on one surface of the polarizing film by the adhesive layer and the cycloolefin-based resin film is laminated on the other surface by the adhesive layer. The polarizing plate of the first aspect, wherein a cellulose acetate-based resin film is laminated on one surface of the polarizing film by an adhesive layer, and a peelable self-adhesive protective film 44 321533 201020631 is laminated on the other surface. 4. The polarizing plate of claim 2, wherein the adhesive layer is formed of a water-based adhesive. 5. The polarizing plate of claim 1 is provided with a backlight and a liquid crystal. A polarizing plate used in a liquid crystal display device of the liquid crystal cell, wherein the liquid crystal display device is in a blue light spectrum measured in a state where only the liquid crystal cell is placed on the backlight and the backlight is lit. The color illuminating wave bee wavelength (jBmax) and the red illuminating wave bee wave L length (Rmax) satisfy the following formula (4): (Rmax- 550) &lt;C550-Bmax) .&quot;(4). — species The method for producing a polarizing plate according to any one of claims 2 to 4, characterized in that the film is laminated on both sides of the polarizing film having a moisture content of 9% or more and within 40 seconds after the layer is laminated, 7 Hey. (: The above temperature is heat-treated. • 7. A liquid crystal display device comprising a backlight and a liquid crystal cell, and a liquid crystal display device of the polarizing plate of the first application of the first item, characterized in that only The liquid crystal cell is placed in a spectrum measured by the backlight in a state where the backlight is lit, and the blue light emission peak wavelength (Bmax) and the red light emission peak wavelength (Rmax) satisfy the following formula (4): (Rmax- 550) &lt; (550-Bmax) ---(4) ° 45 321533