201200918 六、發明說明： 【發明所屬之技術領域】 本發明關於耦合偏光板組和IPS (共面切換）模式液 晶顯示器，即使耦合偏光板組長時間曝露於高溫和高濕度 5 環境，也因對物理改變的抗性而可維持起始設計的相差補 償效應。 【先前技術】 10 液晶顯示器（LCD)廣泛做為一般影像顯示器。 液晶顯示器的模式依據液晶起始配向、電極結構液 晶性質來區分。目前泛用的液晶顯示器模式有扭轉向列 (TN)、垂直配向（VA)、共面切換（lps)模式。再者，液 晶顯不器依據不施加電壓時是否透光而分成常黑或常白 15 模式。再者，VA模式依據液晶的區域和起始配向而分成 PVA (圖案 ed VA)、SPVA (SUper PVA)、MVA (多域 VA) 模式，IPS模式分成S-IPS或FFS模式。 共面切換模式（下文中，稱為IPS模式）的液晶粒子 配向在非作用時大致均勻且平行於液晶基板表面。在Ips 2〇 模式，當下基板透射軸符合正面上的液晶粒子快軸方向 時，下基板透射軸也符合傾斜表面上的液晶粒子快轴。因 此，通過下偏光板的光通過液晶而沒改變偏振狀態，使得 黑狀態可藉由上下排列偏光板而在非作用狀態中實施。 IPS模式液晶顯示器不使用補償偏振狀態改變的光學 4 201200918 膜便可達成廣視角，因自然透射比而可用於巨大且昂貴的 裝置，確保整個螢幕上的均勻影像品質和視角。 習知IPS模式液晶顯示器包含具有液晶的液晶胞、在 液晶胞二側偏光的偏光片、在偏光片一側或二側由三乙酸 5 纖維素（TAe)膜製成的偏光片保護膜。此組態中，當實 施黑狀態時，被設在下板之偏光片所偏振的光被傾斜表面 上的三乙酸纖維素^圓偏振，橢圓偏振A的偏振經由液晶 胞放大，使得光有各種色彩而無漏光。 近年來，IPS模式液晶顯示器須增加尺寸和改善漏光 0 及各種色彩的現象來確保廣視角。 於疋’ IPS模式液晶顯示器設有在一偏光片（PVA)與 液晶胞之間的同向性保護膜和在另一偏光片（PVA)與液 晶胞之間具有$ Jg]光學特性之二4固或以上的土隹疊補償膜 或Z軸配向（厚度方向配向）膜。未拉伸膜做為補償膜 5 來增進液晶顯示器光學特性（對比等等）。 j而，未拉伸膜有利於增進光學特性，但膜性質與高 溫和高濕度外部環境所造成的物理改變靈敏反應，使得相 差和亮度改變。 【發明内容】 於疋本發明的目標是提供一耦合偏光板，即使耦合 偏光板組長時間曝露於高溫和高濕度環境，也因對物理改 變的抗性而可維持起始設計的相差補償效應。 再者，本發明另一目標是提供IPS模式液晶顯示器， 201200918 對所有波長使用均勻透M π & 7σ .a Α β ^ j迟射比可確保視角和傾斜表面上 優良色感。 依據本發明的觀點，提供一種搞合偏光板組，包含： 上偏光板’其中依序堆#保護膜、偏光片、單轴拉伸正A 板；及下偏光板，其中依序堆疊單轴拉伸正A板、偏光片、 保。蔓膜’纟中上偏光板和下偏光板之正A板的共面延遲 (RO)各為10至1〇〇nm，慢軸平行於相鄰偏光片的吸收軸。 正A板的共面延遲（R〇)可為至8〇nm。 正A板的共面延遲（R〇)較佳為至5〇nm。 正Α板的折射率（Νζ)可為〇 9至丨」。 正A板可選自由TAC (三乙酸纖維素）、c〇p (環 烯烴聚合物）' C0C (環烯烴共聚物）、PET (聚乙烯對 苯一甲酸醋）、PP (聚丙烯）、PC (聚碳酸酯）、PSF (聚 砜）、PMMA (聚甲基丙烯酸曱酯）所組成之群類來製成。 上偏光板和下偏光板的吸收軸可彼此垂直。 依據本發明另一觀點，提供一種IPS模式液晶顯示 器’包含上述耦合偏光板組。 本發明可提供疊層偏光片組，即使疊層偏光片組長時 間曝露於高溫和高濕度環境，也因對物理改變的抗性而可 維持起始設計的相差補償效應。 再者’本發明可提供IPS模式液晶顯示器，藉由包含 偏光板’即使在高溫和高濕度環境下，也可確保優良視角。 此外’藉由對所有波長呈現均勻透射比，本發明可提 供即使在傾斜表面也有優良色感的IPS模式液晶顯示器。 6 201200918 再者’本發明使耦合偏光板組或包含耦合偏光板組 的液晶顯示器可輸送通過高溫和高濕度區域或用於此區 域’如熱帶地區、近海地區、赤道地區。 再者，即使使用具有大量熱的背光，或降低液晶顯示 5 器尺寸來降低偏光板與背光的距離，也可有效使用本發 明。 【實施方式】 10 15 20 曰曰 本發明關於耦合偏光板組和jps (共面切換）模式液 顯示器，即使耦合偏光板組長時間曝露於高溫和高濕度 環境，也因對物理改變的抗性而可維持起始設計的相差補 償效應。 下文中，詳細說明本發明的耦合偏光板組。 本發明的耦合偏光板組包含依序堆疊保護膜、偏光 片單軸拉伸正A板的上偏光板，和依序堆疊單轴拉伸正 A板、偏光片、保護膜的下偏光板。 上偏光板和下偏光板之正A板的共面延遲（R〇)和 折射率（NZ)各為10至1〇〇咖和〇9至丨」。再者，慢轴 平行於相鄰偏光板的吸收轴。 偏光片疋改變入射自缺止Λ、0。 町目乾先成早一偏振狀態（線性偏振 狀態）的光學膜’只要能進行-般偏振功能即可。 例如’偏光片能以碘或二向色染料將聚乙烯醇 染色然後在預定方向拉伸來製造。再者，具有偏振功能之 細微圖案之導電晶格和絕緣層的薄偏光㈣在溝上，晶 25 201200918 格的脊可用於透明基板上。 ^構成偏光片的聚乙烯醇樹脂可得自聚乙酸乙烯酯樹 脂的息化。聚乙酸乙烯醋樹脂可包含，例如：做為乙酸乙 7醋均聚物的聚乙酸乙烯醋、乙酸乙稀醋和能與乙酸乙烯 酿共聚之任何其他單體的共聚物等等。能與乙酸乙稀醋共 聚的單體可選自：不飽和缓酸單體、不飽和績酸單體、稀 ‘乙烯S曰單體 '具有銨基的丙烯醯胺單體。 10 15 20 /乙稀醇樹脂可為改質樹脂，例如，諸如聚乙烯醇缩 甲酸或聚乙烯醇缩乙链之搭所改質的樹脂。聚乙締醇樹脂 皂化程度可為85至1〇〇 m〇1%，至少Μ则⑼較佳。聚乙 稀醇樹脂聚合程度可鼻1 s 1λλλ 不度 ί 馬 1，〇〇〇 至 10，_，15〇〇 至 5 〇〇〇 較 佳。 一層聚乙烯醇樹脂做為偏光片。形成聚乙稀醇樹脂層 的方法未特別限制，可使用相關技藝的各種方法。聚 醇樹脂膜厚度可為10至150卿，未特別限制。 偏光片的製程為在單軸拉伸聚乙稀醇膜、以二向 料來染色和吸收、w仰日A ’、 。及收以硼酸溶液進行處理、清潔和乾燥。 在單轴拉伸聚乙烯醇膜的製程可在染色之前、、 或之後進行。在染色後進 或硼酸虛交進订皁軸拉伸時，可在硼酸處理前 成I處理期間進行。顯然，單軸拉伸能以多個步驟進 行。單軸拉伸可盔“ 夕似，驟進 勝脹後行拉伸的乾拉伸或在以溶劑 隸後進仃拉伸的濕拉伸H拉伸_3至8卜 用將染料來染色拉伸聚乙稀醇膜的製程，可使 用將聚乙歸醇膜浸以含有二向色染料之溶液的方法。峨或 8 201200918 二向色染料是二向色 巴木枓的實例。再者，聚乙烯醇膜最好 在染色前浸潤來膨服。 當蛾做為二向色染料時，通常可使用將聚乙烯醇膜浸 入含有碘或碘化鉀之染色溶液的染色方法。通常，毕色溶 5液的埃含量相對於1⑽重量份的水（蒸館水）冑o.om 重，份，破切含量相對於⑽重量份的水為0.5至20 重量伤通f _色溶液溫度為20至40。(：，浸潤時間’ 例如，染色時間為20至1800秒。 當二向色有機染料做為二向色染料時，可使用將聚乙 1〇稀醇膜浸人含有可溶二向色有機染料之染色溶液的染色 方法染色’奋液的一向色有機染料含量相對於1〇〇重量份 的水通常為ixHTl 1G重量份，1χ1Π ι重量份較佳。 木色/合液可it步3有無機鹽，如硫酸鈉。染色溶液溫度 通常為2.0至80oC，浸潤拉pr ,.. . ]寻間，例如，染色時間通常為10 15 至 1，800 秒。 將硼酸處理用於染色之聚乙豨醇膜的製程可藉由將 膜浸入含有賴的溶液來進行。通常，含有硼酸之溶液的 硼酸含量相對於100重量份的水為2至15重量份，5至 12重ϊ份較佳。當碘做為二向色染料時，含有硼酸的溶液 20最好含有碘化鉀’含量相對於1〇〇重量份的水通常為〇1 至15重量伤，5至12重量份較佳。含有硼酸之溶液的溫 度為5〇〇C或以上，50至較佳，60至,C更佳，浸 潤時間為60至⑶0秒，150至_秒較佳，至400 秒更佳。 201200918 在硼酸處理後，清潔並乾燥聚乙婦醇膜。清潔可藉由 將硼酸處理的聚乙稀醇膜浸入水令來進行。清潔的水 為5至40〇C，浸潤時間為】至12〇秒。清潔後乾燥得到偏 光片。通常，乾燥可使用熱空氣乾燥機或遠紅外線加孰器 來進行，乾燥溫度為心雜^至㈣較佳^燥 時間為60至600秒，12〇至6〇〇秒較佳。 ” 偏光片厚度可為5至40μιη。 本發明之單轴拉伸正Α板的共面延遲（R)為至 1〇〇nm。正八板折射率（NZ)為〇.9至L1。 10 15 正A板共面延遲（R〇)是考慮確保廣視角的最佳範 圍，可為10nm至Π)—，1〇11〇1至8〇nm較佳，_至 50nm更佳。 再者’正A板折射率（NZ)理論上為υ，但對於膜 製程很難製造折射率U的正A板。因此，通常，可呈現 與折射率1.0大致㈣性質的折射率（NZ)範圍視為正A 板。 本發明中假設正A板折射率（NZ)為〇9至ΐΐβ 對可見光範圍的所有波長，正Α板光學特性由以下公 式1至3定義。 、·右光源波長未特別陳述，則說明589nm的 丨質本文中，Nx是光在共面方向振盪之具有最大 折射率之軸的折射率，N以光在共面方向之垂直方向振 1的折射率，N7县止+ IS rir i _ 千 Z疋先在厚度方向振盪的折射率，在圖2 表不如下。 10 201200918 [公式1]201200918 VI. Description of the Invention: [Technical Field] The present invention relates to a coupled polarizing plate group and an IPS (coplanar switching) mode liquid crystal display, even if the coupled polarizing plate group is exposed to a high temperature and high humidity environment for a long time, The altered resistance maintains the phase difference compensation effect of the initial design. [Prior Art] 10 Liquid crystal display (LCD) is widely used as a general image display. The mode of the liquid crystal display is distinguished by the liquid crystal starting alignment and the liquid crystal properties of the electrode structure. Currently, the widely used liquid crystal display modes include a twisted nematic (TN), a vertical alignment (VA), and a coplanar switching (lps) mode. Furthermore, the liquid crystal display is divided into a normally black or normally white 15 mode depending on whether or not light is transmitted when no voltage is applied. Furthermore, the VA mode is divided into PVA (pattern ed VA), SPVA (SUper PVA), MVA (multi-domain VA) mode depending on the area of the liquid crystal and the initial alignment, and the IPS mode is divided into an S-IPS or FFS mode. The liquid crystal particle alignment of the coplanar switching mode (hereinafter, referred to as IPS mode) is substantially uniform and parallel to the surface of the liquid crystal substrate when inactive. In the Ips 2〇 mode, when the transmission axis of the lower substrate conforms to the fast axis direction of the liquid crystal particles on the front surface, the transmission axis of the lower substrate also conforms to the fast axis of the liquid crystal particles on the inclined surface. Therefore, the light passing through the lower polarizing plate passes through the liquid crystal without changing the polarization state, so that the black state can be implemented in an inactive state by arranging the polarizing plates up and down. The IPS mode LCD does not use optics that compensate for polarization changes. 4 201200918 The film achieves a wide viewing angle and can be used for large and expensive devices due to natural transmittance, ensuring uniform image quality and viewing angle across the entire screen. The conventional IPS mode liquid crystal display comprises a liquid crystal cell having a liquid crystal, a polarizer polarized on both sides of the liquid crystal cell, and a polarizer protective film made of a triacetate (TAe) film on one side or both sides of the polarizer. In this configuration, when the black state is implemented, the light polarized by the polarizer disposed on the lower plate is circularly polarized by the cellulose triacetate on the inclined surface, and the polarization of the elliptically polarized A is amplified by the liquid crystal cell, so that the light has various colors. There is no light leakage. In recent years, IPS mode liquid crystal displays have to increase the size and improve the light leakage 0 and various colors to ensure a wide viewing angle. Yu's IPS mode liquid crystal display is provided with an isotropic protective film between a polarizer (PVA) and a liquid crystal cell and a optical characteristic of $ Jg between another polarizer (PVA) and a liquid crystal cell. Solid or above soil stacking compensation film or Z-axis alignment (thickness direction alignment) film. The unstretched film acts as a compensation film 5 to enhance the optical characteristics of the liquid crystal display (contrast, etc.). However, the unstretched film is advantageous for enhancing optical characteristics, but the film property is sensitive to physical changes caused by the high temperature and high humidity external environment, so that the phase difference and the brightness change. SUMMARY OF THE INVENTION The object of the present invention is to provide a coupled polarizing plate that maintains the phase difference compensation effect of the initial design due to resistance to physical changes even if the coupled polarizing plate group is exposed to a high temperature and high humidity environment for a long time. Furthermore, another object of the present invention is to provide an IPS mode liquid crystal display, and 201200918 uses a uniform M π & 7σ .a Α β ^ j retardation ratio for all wavelengths to ensure excellent color perception on a viewing angle and an inclined surface. According to the viewpoint of the present invention, a polarizing plate assembly is provided, comprising: an upper polarizing plate, wherein the protective film, the polarizing film, the uniaxially stretched positive A plate, and the lower polarizing plate are sequentially stacked in a single axis; Stretch the positive A plate, polarizer, and protect. The coplanar retardation (RO) of the positive A plate of the smear film and the positive A plate of the lower polarizer is 10 to 1 〇〇 nm each, and the slow axis is parallel to the absorption axis of the adjacent polarizer. The coplanar retardation (R〇) of the positive A plate can be up to 8 〇 nm. The coplanar retardation (R〇) of the positive A plate is preferably up to 5 〇 nm. The refractive index (Νζ) of the positive plate can be from 〇 9 to 丨. Positive A plate can be selected from free TAC (cellulose triacetate), c〇p (cycloolefin polymer) 'C0C (cycloolefin copolymer), PET (polyethylene terephthalate), PP (polypropylene), PC It is made up of a group consisting of (polycarbonate), PSF (polysulfone), and PMMA (poly(meth) methacrylate). The absorption axes of the upper polarizing plate and the lower polarizing plate may be perpendicular to each other. According to another aspect of the present invention, there is provided an IPS mode liquid crystal display device comprising the above-described coupled polarizing plate group. The present invention can provide a laminated polarizer group which maintains the phase difference compensation effect of the initial design due to resistance to physical changes even when the laminated polarizer group is exposed to a high temperature and high humidity environment for a long period of time. Further, the present invention can provide an IPS mode liquid crystal display, and an excellent viewing angle can be ensured by including a polarizing plate even in a high temperature and high humidity environment. Further, by presenting a uniform transmittance for all wavelengths, the present invention can provide an IPS mode liquid crystal display having excellent color feeling even on an inclined surface. 6 201200918 Furthermore, the present invention enables a coupled polarizing plate group or a liquid crystal display including a coupled polarizing plate group to be transported through a high temperature and high humidity region or used in such a region as in a tropical region, an offshore region, and an equatorial region. Furthermore, the present invention can be effectively used even if a backlight having a large amount of heat is used, or the size of the liquid crystal display is lowered to reduce the distance between the polarizing plate and the backlight. [Embodiment] 10 15 20 曰曰 The present invention relates to a coupled polarizing plate group and a jps (coplanar switching) mode liquid display, even if the coupled polarizing plate group is exposed to a high temperature and high humidity environment for a long time, due to resistance to physical changes. The phase difference compensation effect of the initial design can be maintained. Hereinafter, the coupled polarizing plate group of the present invention will be described in detail. The coupled polarizing plate group of the present invention comprises an upper polarizing plate in which a protective film, a polarizing plate uniaxially stretched a positive A plate are sequentially stacked, and a lower polarizing plate in which a uniaxially stretched positive A plate, a polarizing plate, and a protective film are sequentially stacked. The coplanar retardation (R〇) and the refractive index (NZ) of the positive A plate of the upper polarizing plate and the lower polarizing plate are 10 to 1 〇〇 and 〇 9 to 各, respectively. Furthermore, the slow axis is parallel to the absorption axis of the adjacent polarizing plate. The polarizer 疋 changes the incident from the missing Λ, 0. The optical film "the optical film of the early polarization state (linear polarization state) can be used as long as it can perform the general polarization function. For example, the polarizer can be produced by dyeing polyvinyl alcohol with iodine or a dichroic dye and then stretching it in a predetermined direction. Further, the conductive lattice of the fine pattern having the polarization function and the thin polarized light of the insulating layer (4) are on the groove, and the ridge of the crystal 25 201200918 can be used for the transparent substrate. The polyvinyl alcohol resin constituting the polarizer can be obtained from the polyvinyl acetate resin. The polyvinyl acetate vinegar resin may contain, for example, a polyvinyl acetate vinegar which is a homopolymer of ethyl acetate 7 acetate, a copolymer of ethylene acetonate and any other monomer which can be copolymerized with vinyl acetate, and the like. The monomer copolymerizable with the ethyl acetate vinegar may be selected from the group consisting of unsaturated acid-lowering monomers, unsaturated acid-sensing monomers, and dilute ethylene sulfonium monomers having an ammonium group. The 10 15 20 /ethylene glycol resin may be a modified resin such as a resin modified with a polyvinyl acetal or a polyvinyl alcohol chain. The polyethylene glycol resin may have a degree of saponification of 85 to 1 〇〇 m 〇 1%, and at least Μ (9) is preferred. The degree of polymerization of the polyethylene glycol resin can be 1 s 1 λ λ λ inferior ί Ma 1, 〇〇〇 to 10, _, 15 〇〇 to 5 〇〇〇 is preferred. A layer of polyvinyl alcohol resin is used as a polarizer. The method of forming the polyethylene glycol resin layer is not particularly limited, and various methods of the related art can be used. The polyol resin film may have a thickness of 10 to 150 angstroms, and is not particularly limited. The process of the polarizer is to uniaxially stretch the polyethylene film, dye and absorb with a dichroic material, and to raise the A'. And treated with boric acid solution, cleaned and dried. The process of uniaxially stretching the polyvinyl alcohol film can be carried out before, after or after the dyeing. It may be carried out during the I treatment before the boric acid treatment, after the dyeing or the boric acid is broken. Obviously, uniaxial stretching can be performed in multiple steps. Uniaxial stretching can be used as a helmet. It is a dry stretch of stretching after stretching or a wet stretching of stretching after stretching with a solvent. _3 to 8 For the process of the polyvinyl alcohol film, a method of immersing the polyethyl alcohol film with a solution containing a dichroic dye may be used. 峨 or 8 201200918 The dichroic dye is an example of a dichroic hibiscus. The vinyl alcohol film is preferably infiltrated before dyeing to embed. When the moth is used as a dichroic dye, a dyeing method in which a polyvinyl alcohol film is immersed in a dyeing solution containing iodine or potassium iodide can be usually used. The angstrom content is from 1 to 10 parts by weight of water (steamed water) 胄o.om, and the content of the cut is 0.5 to 20 parts by weight with respect to (10) parts by weight of water, and the temperature of the solution is 20 to 40. (:, infiltration time' For example, the dyeing time is 20 to 1800 seconds. When the dichroic organic dye is used as a dichroic dye, the poly(ethylene) dilute alcohol film may be impregnated with a soluble dichroic organic dye. The dyeing method of the dyeing solution is dyed with the content of the organic color dye of the dyeing liquid relative to 1 part by weight. The water is usually ixHT1 1G by weight, preferably 1 χ 1 Π by weight. The wood color/liquid mixture can have an inorganic salt such as sodium sulfate. The temperature of the dyeing solution is usually 2.0 to 80 ° C, and the immersion pull pr , . . . For example, the dyeing time is usually from 10 15 to 1,800 sec. The process of treating boric acid for dyeing the polyethylene glycol film can be carried out by immersing the film in a solution containing lye. Usually, a solution containing boric acid The boric acid content is preferably from 2 to 15 parts by weight, based on 100 parts by weight of water, and preferably from 5 to 12 parts by weight. When iodine is used as a dichroic dye, the boric acid-containing solution 20 preferably contains potassium iodide as a content relative to 1 Torr. The weight of water is usually from 1 to 15 weights, preferably from 5 to 12 parts by weight. The temperature of the solution containing boric acid is 5 〇〇C or more, 50 to preferably, 60 to, C is better, and the infiltration time is 60 to (3) 0 seconds, preferably 150 to _ seconds, preferably 400 seconds. 201200918 After the boric acid treatment, the polyglycol film is cleaned and dried. The cleaning can be done by immersing the boric acid treated polyethylene film in the water. To carry out. Clean water is 5 to 40 〇 C, infiltration time is 】 to 12 〇 seconds. Dry after cleaning A polarizer is obtained. Usually, the drying can be carried out using a hot air dryer or a far-infrared twister, and the drying temperature is preferably from 60 to 600 seconds, preferably from 12 to 6 seconds. The thickness of the polarizer may be 5 to 40 μm. The coplanar retardation (R) of the uniaxially stretched positive-twisted plate of the present invention is 1 〇〇 nm. The refractive index (NZ) of the positive eight-plate is 〇.9 to L1. 15 Positive A plate coplanar retardation (R〇) is an optimum range for ensuring a wide viewing angle, and may be 10 nm to Π), preferably 1 〇 11 〇 1 to 8 〇 nm, and more preferably _ to 50 nm. Further, the refractive index (NZ) of the positive A plate is theoretically υ, but it is difficult to produce a positive A plate having a refractive index U for the film process. Therefore, in general, a refractive index (NZ) range which can exhibit a substantially (four) property with a refractive index of 1.0 is regarded as a positive A plate. In the present invention, it is assumed that the positive A plate refractive index (NZ) is 〇9 to ΐΐβ for all wavelengths in the visible range, and the positive plate optical characteristics are defined by the following formulas 1 to 3. The right source wavelength is not specifically stated, indicating a 589 nm enamel. In this context, Nx is the refractive index of the axis with the largest refractive index of light oscillating in the coplanar direction, and N is 1 in the vertical direction of the coplanar direction. The refractive index, N7 county stop + IS rir i _ thousand Z 疋 first refractive index in the thickness direction, as shown in Figure 2 below. 10 201200918 [Formula 1]
Rth = [(Νχ + 抑）/ 2 _ NZ] X d (其中Nx和Ny是光在共面方向振盪的折射率且 Nx>Ny，Nz是光在膜厚度方向振盪的折射率，d是 5 膜厚度）。 [公式2] R〇 = (Nx - Ny) x d (其中Nx和Ny是光在共面方向振盪的折射率，d是 1〇 膜厚度，Nx2Ny)。 [公式3] NZ = (Nx _ Nz) / (Nx - Ny) = Rth / r〇 + 〇 5 (其中Nx和Ny是光在共面方向振盪的折射率且 15 N^Ny’ NZ是光在膜厚度方向振盧的折射率，d是 臈厚度）。 之共面平均折射率 (垂直方向）穿透Rth = [(Νχ + )) / 2 _ NZ] X d (where Nx and Ny are the refractive indices of light oscillating in the coplanar direction and Nx > Ny, Nz is the refractive index of light oscillating in the film thickness direction, d is 5 Film thickness). [Formula 2] R〇 = (Nx - Ny) x d (where Nx and Ny are refractive indices of light oscillating in the coplanar direction, and d is 1 膜 film thickness, Nx2Ny). [Formula 3] NZ = (Nx _ Nz) / (Nx - Ny) = Rth / r〇 + 〇5 (where Nx and Ny are the refractive indices of the light oscillating in the coplanar direction and 15 N^Ny' NZ is the light The refractive index of the film thickness direction, and d is the thickness of the germanium. Coplanar average refractive index (vertical) penetration
Rth是厚度延遲，呈現對厚度方向 的相差’並非實質相差，而是參考值。 R0是共面延遲，是光在法線方向 膜時的實質相差。 補償膜μ Γ折射率，從它可分辨補償膜的板種類。 膜共二二板種類在沒有相…學軸存在於 /、面方向時稱為Α板， 隹 時為C板，二光風 存在於平面的垂直方向 先予軸存在時為雙軸板。 20 201200918 本發明的正A板可由且古τ / 由具有正（+)折射率特性的臈製 成。洋§之，可選自由 (二乙酸纖維素）、C〇p (淨 烯烴聚合物）、coc ( m m u ^ 朴 1哀烯尨共聚物）、pet (聚乙烯對 本二甲酸醋）、pp (平 A 埽）、PC (聚碳酸醋）、psf (聚 石風）、PMMA (聚甲某兩咕**» 、 灰Τ基丙烯酸F酯）戶斤組成的群類中。 製造本發明的正A板是在一方向拉伸具有正折射率 的膜，以保持對外部環境之物理改變的抗性。膜的巨分子 排列變形，相較於未拉伸膜 租评膜，拉伸膜對外部環境的物理改 變較不敏感。 1〇 纟伸分成固定端拉伸和自由端拉伸。固定端拉伸是在 膜拉伸時於拉伸方向除外的方向固定長度。自由端拉伸是 在膜拉伸時於拉伸方向除外的方向賦予自由度。 本發明的正A板以自由端單軸拉伸。 再者，拉伸外再應用額外製程可控制慢軸方向、相差 15 值、NZ值，額外製程是未特別限制的常用製程。 設置單軸拉伸正以，使得慢轴平行於下偏光板的偏 光片吸收軸。具有偏振功能之聚乙烯醇所製成之偏光片的 偏光板成分在高溫和高濕度外部環境反應最靈敏。因此， 使正A板慢軸平行於偏光片吸收轴，可改善對外部環境的 2〇 物理抗性。 因為偏光片機械性脆弱，故保護膜意味保護偏光片的 膜。 保護膜可具有優良透明性、機械強度、熱安定性、防 水性、同向性。保護膜的透濕度隨樹脂種類而變，最好考 12 201200918 慮透濕度來選擇保護膜。 保濩臈可選自熱塑性樹脂，例如聚酯樹脂，如聚乙稀 對苯二曱酸醋、聚乙稀間苯二甲酸醋、聚乙稀鄰苯二甲酸 酯、聚丁烯對苯二曱酸酯；纖維素樹脂，如二乙酸纖維素 5 和三乙酸纖維素；聚碳酸酯樹脂；丙烯酸樹脂，如聚甲基 丙婦酸甲醋和聚乙基丙稀酸甲醋；笨乙烯樹脂，如聚苯乙 烯和丙烯腈·笨乙烯共聚物；聚烯烴樹脂，如聚乙烯、聚丙 烯具有環形或降冰片烯結構的聚烯烴；烯烴樹脂，如乙 烯-丙烯共聚物；氣乙烯樹脂；聚亞醯胺樹脂，如尼龍和芳 10香聚亞醯胺；亞醯胺樹脂；聚醚砜樹脂；砜樹脂；聚醚_ 樹脂；聚苯硫喊樹脂；乙稀醇樹脂；二氣乙烯樹脂；乙烯 醇縮丁醛樹脂；烯丙基化樹脂；聚甲醛樹脂；環氧樹脂， 膜也可使用熱塑性樹脂的混合來組成。再者，膜可使用丙 烯鲛甲s曰、聚氨酯、環氧、矽樹脂的熱固性樹脂或紫外光 15 固化樹脂來形成。 保護膜的熱塑性樹脂含量為5〇至1〇〇 wt%，5〇至99 wt%較佳，60至98wt%更佳，7〇至97以％最佳。當含量小 於5〇wt%時，不能充分實現熱塑性樹脂的獨特高透射比。 偏光板通常由轴對軸（r〇H_t〇_r〇ll)製程和片對片 2〇 (SheeM〇-Sheet)製程製造。考慮製程中的良率和效率，最 好應用軸對軸製程，因為pVA偏光片吸收軸固定在md方 向’故特別有效。 由於本發明的耦合偏光板組即使曝露於高溫和高濕 度環境對物理改變也有優良抗性，故可維持起始設計的相 13 201200918 差補償效應。例如’在曝露於50。€和80% rh的環境下 三天後’共面延遲（R〇)的改變小於〇 5nm，厚度延遲 (Rth)的改變小於inm。 本發明的耗合偏光板組可用於IPS模式液晶顯示器。 5 假6又從可見側右水平方向的反時鐘方向為正常（+ )方 向’不施加電壓，則可使用液晶配向方向9〇。（s_ips)或 液晶配向方向0。（FFS)的液晶胞。 S-IPS的面板相差值（Δη X d)由以下公式4定義，於 589nm 波長在 30〇nm 至 330mn 範圍，FFS 在 370 至 400nm 10 範圍。 [公式4] ΔηΧά = (ne. - ηό) x d (其中ne是液晶的非常光線折射率，n。是尋常光線折 15 射率’ d是晶胞間隙’ △ η和d是純量，非向量）。 本發明的上偏光板吸收軸垂直於下偏光板吸收軸。從 可見側來看時’下偏光片吸收軸位於垂直方向較佳。 當接近背光單元之下偏光片的吸收軸垂直排列時，通 過下偏光板的光水平偏振。水平偏振的光通過施加面板電 20 壓且切換到白狀態的液晶胞，光垂直改變，在水平方向通 過可見側的上偏光板。在此情形’戴著吸收軸在可見側水 平方向之偏光太陽眼鏡的人會發現光離開液晶顯示器。 然而’當接近背光單元之下偏光板的吸收軸在水平方 向時’戴著此種偏光太陽眼鏡的人看不到影像。 14 201200918 再者，對大的液晶顯示器，使用水平寬廣的液晶顯示 器，使得影像可從可見側清楚看見。這是考慮人主要視野 在水平方向比垂直方向廣，對一般液晶顯示器，以4:3或 16:9比來製造液晶顯示器’有特殊目的（如廣告）的液晶 顯示器除外。 在邦加球（Poincare sphere)上呈現通過各光學層的 偏振狀態改變可瞭解本發明之補償視角的效果。 邦加球呈現在特定視角的偏振狀態改變。可呈現當光 通過液晶顯示器的各光學元件時的偏振狀態改變。進入液 .4 丁器的光疋偏振光，入射光以特定視角通過液晶顯示 器内部離開。 本發明的特定視角是圖4之半圓座標系統的F =45。 方向由呈現對所有波長在此方向離開之光之邦 加球上的偏振狀態改變，可看到波長分布。 15 20 再者，從圖7A至7C依據波長的透射比，可看到曝露 於高溫和高濕度環境後在特定視角（傾斜表面）的色感。 由於本發明在上下偏光板上有拉伸的特定正A板，故 均勾透射比呈現在則至·⑽内的波長，使得色感不僅 在正面也在傾斜表面上優良。 下文令，參照實例和比較實例來說明較佳實施例以更 瞭解本發明。然而’熟悉此技藝者知道，此實施例用於說 月的目的’可做各種修改和改變而不恃離本發明的範嘴和 精神，此種修改和改變包含在申請專利範圍所界定的本發 明中。 15 201200918 實例 實例1 圖1的、纟。構中，在TECH WIZ LCD 1D (韓國sanayi SYSTEM公司）上測量依據本發明之光學膜、液晶胞、背光 的實際資料。以下詳細說明圖丨的結構。 ，實例1從背光包括下偏光板10、IPS模式液晶胞3〇 (當從可見側之右水平方向的反時鐘方向為正常（+)方 向時，不施加電壓，其液晶配向方向為9〇。）、上偏光板 2〇。下偏光板10從液晶胞堆疊正a板14、偏光片η、保 濩膜13而成。上偏光板2〇從液晶胞3〇堆疊正a板24、 偏光片21、保護膜23而成。 5 10 當從可見側之右水平方向的反時鐘方向為正常) 方向時，下偏光板10之偏光片丨丨的吸收軸12在9〇。， 上偏光板20之偏光片21的吸收軸22在〇。。 15 液晶胞是LG DisPlay公司之42吋面板的ιχ42〇πυ5。 用於此實例的光學膜和背光單元各有以下光學性質。 將拉伸的PVA染上碘而使下偏光板1〇和上偏光板2〇 的偏光片11和21有偏振功能。偏光片偏振功能在37〇至 780ηηι可見光區域具有99 9%或以上的亮度偏振程度偏極 ° 亮度程度（luminance degree of polarization)和 41%或以 上的亮度群透射比（luminance group transmittance)。 當隨波長之透射軸的透射比為Τϋ(λ)，隨波長之吸收 轴的透射比為ΜΟ(λ)，定義於jis Ζ 8701:1999的亮度補償 值為〆Λ)時，偏振亮度程度和亮度群透射比由以下公式5 16 201200918 至9定義’其中S(X)是光源光譜，光源是c光源 [:公式5] 广 7β〇 _Rth is the thickness delay, and the phase difference 'in the thickness direction' is not substantially different, but a reference value. R0 is the coplanar retardation, which is the substantial phase difference of the light in the normal direction film. The compensation film μ Γ refractive index from which the type of the compensation film can be resolved. The total number of membranes in the film is called the slab when there is no phase in the /, and the C plate in the 隹, and the two glazes exist in the vertical direction of the plane. 20 201200918 The positive A plate of the present invention can be made of 且 / / 臈 having a positive (+) refractive index characteristic. §, choose free (diacetate), C〇p (net olefin polymer), coc (mmu ^ 1 哀 哀 尨 ) copolymer), pet (polyethylene to the dicarboxylic acid vinegar), pp (flat A 埽), PC (polycarbonate), psf (polylithic wind), PMMA (polymethyl 某 **», ash-based acrylic acid F ester) in the group consisting of jin. The positive A plate of the present invention is produced by stretching a film having a positive refractive index in one direction to maintain resistance to physical changes in the external environment. The macromolecules of the membrane are arranged and deformed, and the stretched membrane is less sensitive to physical changes in the external environment than the unstretched membrane. 1〇 The extension is divided into a fixed end stretch and a free end stretch. The fixed end stretching is a fixed length in the direction excluding the stretching direction when the film is stretched. The free end stretching imparts a degree of freedom in a direction excluding the stretching direction when the film is stretched. The positive A plate of the present invention is uniaxially stretched at the free end. Furthermore, the additional process can be applied to the slow axis direction, the phase difference value, and the NZ value. The additional process is a common process that is not particularly limited. The uniaxial stretching is set such that the slow axis is parallel to the polarizer absorption axis of the lower polarizer. The polarizer component of a polarizer made of a polarizing function is most sensitive to the high temperature and high humidity external environment. Therefore, making the slow axis of the positive A plate parallel to the absorption axis of the polarizer improves the physical resistance to the external environment. Since the polarizer is mechanically weak, the protective film means to protect the film of the polarizer. The protective film can have excellent transparency, mechanical strength, thermal stability, water resistance, and isotropic properties. The moisture permeability of the protective film varies depending on the type of the resin. It is best to select the protective film by considering the humidity of 12 201200918. The oxime may be selected from thermoplastic resins such as polyester resins such as polyethylene terephthalate, polyethylene phthalate, polyethylene phthalate, polybutylene phthalate Phthalate esters; cellulose resins such as cellulose diacetate 5 and cellulose triacetate; polycarbonate resins; acrylic resins such as methyl methacrylate and methyl ethyl acrylate; stupid vinyl , such as polystyrene and acrylonitrile-stupid ethylene copolymer; polyolefin resin, such as polyethylene, polypropylene, polyolefin having a ring or norbornene structure; olefin resin, such as ethylene-propylene copolymer; gas vinyl resin; Melamine resin, such as nylon and aromatic 10 melamine; sulfoxide resin; polyether sulfone resin; sulfone resin; polyether _ resin; polyphenyl sulfonate resin; ethylene glycol resin; Vinyl butyral resin; allylated resin; polyacetal resin; epoxy resin, the film may also be composed of a mixture of thermoplastic resins. Further, the film can be formed using a thermosetting resin of acrylonitrile, urethane, epoxy, enamel resin or an ultraviolet light curing resin. The protective film has a thermoplastic resin content of from 5 Å to 1% by weight, preferably from 5 Å to 99% by weight, more preferably from 60 to 98% by weight, most preferably from 7 Å to 97% by weight. When the content is less than 5 % by weight, the unique high transmittance of the thermoplastic resin cannot be sufficiently achieved. The polarizing plate is usually manufactured by a shaft-to-axis (r〇H_t〇_r〇ll) process and a sheet-to-sheet (SheeM〇-Sheet) process. Considering the yield and efficiency in the process, it is best to apply the shaft-to-axis process because the absorption axis of the pVA polarizer is fixed in the md direction, which is particularly effective. Since the coupled polarizing plate group of the present invention has excellent resistance to physical changes even when exposed to a high temperature and high humidity environment, the phase compensation effect of the initial design can be maintained. For example 'exposure to 50. After three days in the environment of € and 80% rh, the change in coplanar retardation (R〇) was less than 〇 5 nm, and the change in thickness retardation (Rth) was less than inm. The consumable polarizing plate group of the present invention can be used for an IPS mode liquid crystal display. 5 False 6 and the counterclockwise direction from the visible side right horizontal direction is normal (+) direction. If no voltage is applied, the liquid crystal alignment direction can be used 9 〇. (s_ips) or LCD alignment direction 0. (FFS) liquid crystal cell. The panel phase difference (Δη X d) of the S-IPS is defined by the following formula 4, which ranges from 30 〇 nm to 330 mn at 589 nm and from 370 to 400 nm 10 at FFS. [Formula 4] ΔηΧά = (ne. - ηό) xd (where ne is the extraordinary ray refractive index of the liquid crystal, n is the ordinary ray of light 15 radiance 'd is the cell gap' Δ η and d are scalar, non-vector ). The upper polarizing plate absorption axis of the present invention is perpendicular to the lower polarizing plate absorption axis. When viewed from the visible side, the lower polarizer absorption axis is preferably in the vertical direction. When the absorption axis of the polarizer near the backlight unit is vertically aligned, the light passing through the lower polarizer is horizontally polarized. The horizontally polarized light is electrically pressed by the application panel and switched to the liquid crystal cell in the white state, and the light is vertically changed to pass through the upper polarizing plate on the visible side in the horizontal direction. In this case, a person wearing polarized sunglasses that absorbs the axis in the horizontal direction of the visible side will find light leaving the liquid crystal display. However, when the absorption axis of the polarizing plate below the backlight unit is in the horizontal direction, the person wearing such polarized sunglasses does not see the image. 14 201200918 Furthermore, for large liquid crystal displays, use a wide horizontal liquid crystal display so that the image can be clearly seen from the visible side. This is to consider the main field of view of the person. In the horizontal direction, it is wider than the vertical direction. For general liquid crystal displays, the liquid crystal display is manufactured in a ratio of 4:3 or 16:9, except for liquid crystal displays with special purposes (such as advertising). The effect of compensating the viewing angle of the present invention can be understood by presenting a change in polarization state of each optical layer on a Poincare sphere. The Bangka ball exhibits a change in polarization state at a particular viewing angle. A change in polarization state can occur when light passes through the various optical elements of the liquid crystal display. Entering the liquid.4 The polarized light of the lighter, the incident light exits through the inside of the liquid crystal display at a specific angle of view. A particular perspective of the present invention is F = 45 for the semicircular coordinate system of Figure 4. The direction is changed by the polarization state on the ball that presents the light leaving all wavelengths in this direction, and the wavelength distribution can be seen. Further, from Figs. 7A to 7C, depending on the transmittance of the wavelength, the color sensation at a specific viewing angle (inclined surface) after exposure to a high temperature and high humidity environment can be seen. Since the present invention has a specific positive A plate which is stretched on the upper and lower polarizing plates, the average transmittance of the hook is in the wavelength of up to (10), so that the color feeling is excellent not only on the front side but also on the inclined surface. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments will be described with reference to examples and comparative examples to better understand the invention. However, it is to be understood by those skilled in the art that this embodiment is intended to be used in the context of the present invention, and various modifications and changes may be made without departing from the spirit and scope of the invention. In the invention. 15 201200918 Examples Example 1 Figure 1, 纟. In the construction, the actual data of the optical film, the liquid crystal cell, and the backlight according to the present invention were measured on TECH WIZ LCD 1D (Sanayi SYSTEM, Korea). The structure of the figure 详细 is explained in detail below. Example 1 includes a lower polarizing plate 10 and an IPS mode liquid crystal cell from the backlight (when the counterclockwise direction from the right horizontal direction of the visible side is the normal (+) direction, no voltage is applied, and the liquid crystal alignment direction is 9 Å. ), the upper polarizing plate 2 〇. The lower polarizing plate 10 is formed by stacking the positive a plate 14, the polarizer n, and the protective film 13 from the liquid crystal cells. The upper polarizing plate 2 is formed by stacking the positive a plate 24, the polarizing plate 21, and the protective film 23 from the liquid crystal cells. 5 10 When the counterclockwise direction from the right horizontal direction of the visible side is the normal direction, the absorption axis 12 of the polarizer 下 of the lower polarizing plate 10 is 9 〇. The absorption axis 22 of the polarizer 21 of the upper polarizing plate 20 is at 〇. . 15 The LCD cell is ιχ42〇πυ5 of the 42-inch panel of LG DisPlay. The optical film and backlight unit used in this example each have the following optical properties. The stretched PVA is dyed with iodine so that the polarizing plates 11 and 21 of the lower polarizing plate 1 〇 and the upper polarizing plate 2 有 have a polarization function. The polarization function of the polarizer has a luminance degree of polarization of 99 9% or more in the visible light region of 37 Å to 780 ηη, and a luminance group transmittance of 41% or more. When the transmittance of the transmission axis with wavelength is Τϋ(λ), the transmittance of the absorption axis with wavelength is ΜΟ(λ), defined as the luminance compensation value of jis Ζ 8701:1999 is 〆Λ), the degree of polarization and The luminance group transmittance is defined by the following formula 5 16 201200918 to 9 'where S(X) is the source spectrum, the source is the c source [: Equation 5] wide 7β〇 _
Tm = K S(X)y(X)TD(X)dX ，’湖 [公式6] [公式7] ιοα jB#* «£>«». · 10 [公式8] 偏振程度= / Trn - Tmd V Ttd + Tmd 15 [公式9] 群透射比=i^ro + 7^ 2 在589.3nm光源，卜值水4c > τ 兀你上偏先板之正八板24和下偏光板 之正Α板14的共面延遲（R〇)為5〇nm，厚度延遲（Rth；> 為25nm，折射率（NZ)為i 〇。 17 201200918 上偏光片21的吸收軸22和正A板24的快軸25平 行而下偏光片11的吸收軸12和正A板14的快軸15平. 行。 由拉伸自由端的單軸拉伸製程將上偏光板的正A板 24和下偏光板的正a板14製造出具有所需光學性質。 再者’上和下偏光板10和20的外保護膜π和22由 對5 89.3nm入射光具有5〇nm厚度延遲（Rth)的TAC (三 乙酸纖維素）製成。裝在32吋電視LC320WX4機型（LG. PHILIPS LCD公司）的實際資料用於背光單元5〇。 實例2 以實例1的相同方式來進行實例2，其中在上偏光板 2〇的正A板24,共面延遲（R〇)為5〇nm，厚度延遲（Rth) 為25nm，折射率（NZ)為1.0。 再者使用下偏光板1〇的正A板14來製造jpg模式 液晶顯示器，其共面延遲（R〇)為8〇nm，厚度延遲（Μ" 為40nm，折射率（NZ)為l.o。 實例3 以實例1的相同方式來進行實例3,其中在上偏光板 〇的正A板24’共面延遲（R0…0,厚度延遲（Rth) 為40nm，折射率（NZ)為1 〇。 再者’使用下偏光板1()的正八板14來製造奶模式 夜晶顯示器，其共面延遲（R0)為8〇nm，厚度延遲（Rth) 18 201200918 為40nm，折射率（NZ)為1 〇。 實例4 以實例1的相同方式來進行實例4，纟中在上偏光板 20的正A板24,共面延遲（R〇)為8〇nm，厚度延遲（Rth) 為40nm，折射率（NZ)為i.o。 再者使用下偏光板10的正A板14來製造ιρ§模式 液曰曰顯示器，其共面延遲（R0)為50nm，厚度延遲（Rth) 為25nm，折射率（NZ)為i.o。 實例5 以實例1的相同方式來進行實例5，其中在上偏光板 2〇的正A板24’共面延遲（R〇)為3〇nm，厚度延遲（Rth) 為15nm，折射率（NZ)為i.o。 再者使用下偏光板10的正A板14來製造IPS模式 液日日..属不器，其共面延遲（R〇)為3〇nm，厚度延遲（&化) 為15nm，折射率（NZ)為1.0。 實例6 20 以實例1的相同方式來進行實例6，& 為5nm ’折射率（NZ)為i.o。 再者，使用下偏光板10的正八板14來製造⑽模式 液晶顯示器，其共面延遲剛為1Gnm，厚度延遲（岡 201200918 為5nm，折射率（NZ)為1.0。 實例7 以實例1的相同方式來進行實例7，其中在上偏光板 20的正Α板24’共面延遲（R〇)為…如爪，厚度延遲（Rth) 為50nm，折射率（NZ)為1.0。 再者，使用下偏光板10的正人板14來製造ips模式 液晶顯示器，其共面延遲（R〇)為1〇〇nm，厚度延遲 為50nm ’折射率（NZ)為l.o。 10 實例8 再者，以實例1的相同方式來進行實例8，使用上偏 光板的正A板24和下偏光板的正a板14來製造模式 液晶顯示器，其共面延遲（R0)為5〇nm，厚度延遲 15 為20nm ’折射率（NZ)為〇,9。 實例9 再者，以實例1的相同方式來進行實例9，使用上偏 光板的正A板24和下偏光板的正a板14來製造as模式 2〇 液晶顯示器，其共面延遲（R〇)為50nm，厚度延遲（R^) 為30nm，折射率（NZ)為I」。 比較實例1 使用同向性 以實例1的相同方式來進行比較實例1 20 201200918 保護膜來製造IPS模式液晶顯示器，其共面延遲（R〇)為 lnm ’厚度延遲（Rth)為2nrn，取代上偏光板和下偏光板 的正人板14和24。 5 比較實例2 以實例1的相同方式來進行比較實例2，製造IPS模 式液晶顯示器使得上偏光片21的吸收軸22和正a板24 的快軸25垂直’而下偏光片u的吸收軸12和正a板14 的快軸1 5垂直。 10 比較實例3 以實例1的相同方式來進行比較實例3，其中在上偏 光板20的正A板24’共面延遲（R〇)為5〇ηπι，厚度延 遲（Rth)為25nm ’折射率（Νζ)為1 〇。 15 再者，使用同向性保護膜來製造IPS模式液晶顯示 器，其共面延遲（RO)為lnm，厚度延遲（Rth)為2nm， 取代下偏光板10的正A板14。 比較實例4 20 以實例1的相同方式來進行比較實例4，使用共面延 遲（RO)為lnm和厚度延遲（Rth)為2nm的同向性保護 膜’取代上偏光板20的正a板14。 再者，使用下偏光板10的正A板14來製造ips模式 液晶顯不器，其共面延遲（R〇)為5〇nm，厚度延遲（Rth) 21 201200918 為25nm ’折射率（NZ)為ι·〇。 實驗實例 5 10 15 20 實例和比較實例所製造之耦合偏光板組和液晶顯示 器的特性由以下方法來測量。 (1) 液晶顯示器的偏振程度 使用V7100來測量3〇x3〇mrn偏光板的偏振程度。 (2) 搞合偏光板組的相差改變量 耦合偏光板組置入50。(：溫度和80%RH的室（高溫/ 高濕度室）中以測量耦合偏光板組的相差量，三天後測量 相差量。 (3) 液晶顯示器的偏振狀態改變 在邦加球上測量在f=45。和0=60。傾斜方向的偏振狀 態改變。 (4)污染疋否發生在耗合偏光板組 的室（高溫/ 三天後目視 耦合偏光板組置入50°C溫度和8〇%rh 向濕度至）中以測量搞合偏光板組的相差量， 檢查是否發生污染。 [污染產生程度的基準] 0 : 很少污染 △: 普通 顯“的偏振程度測量。可看 22 201200918 伸而呈現相同範圍。 圖6呈現用於實例1至7和比較實例1至4之麵合偏 光板組的相差改變。從圖6可看出在耦合偏光板組置入高 溫和高濕度室之前和之後，共面延遲和厚度延遲的改變量 5 隨是否進行拉伸而大為不同。可看出使用未拉伸膜時的相 差值改變量遠大於使用拉伸膜時。 再者，可看出相差值改變量在拉伸膜和未拉伸膜的組 合大於拉伸膜的組合。 再者，下表1呈現實例1至7和比較實例1之耦合偏 10 光板組的污染產生程度。從表1可看出污染產生程度在使 用本發明之耦合偏光板的實例1至7遠遠較小。 表1Tm = KS(X)y(X)TD(X)dX , 'Lake [Formula 6] [Formula 7] ιοα jB#* «£>«». · 10 [Formula 8] Degree of Polarization = / Trn - Tmd V Ttd + Tmd 15 [Equation 9] Group transmittance = i^ro + 7^ 2 at 589.3nm source, bu value water 4c > τ 兀 you are on the positive plate of the first plate 24 and the lower plate of the lower polarizer The coplanar retardation (R〇) of 14 is 5 〇 nm, the thickness retardation (Rth; > is 25 nm, and the refractive index (NZ) is i 〇. 17 201200918 The absorption axis 22 of the upper polarizer 21 and the fast axis of the positive A plate 24 The absorption axis 12 of the parallel and lower polarizer 11 is parallel to the fast axis 15 of the positive A plate 14. The uniaxial stretching process of the free end of the stretcher is the positive a plate of the upper polarizing plate and the positive a plate of the lower polarizing plate. 14The desired optical properties are produced. Further, the outer protective films π and 22 of the upper and lower polarizing plates 10 and 20 are TAC (cellulose triacetate) having a thickness retardation (Rth) of 5 〇 nm for 5 89.3 nm incident light. The actual data of the 32-inch TV LC320WX4 model (LG. PHILIPS LCD) was used for the backlight unit 5 . Example 2 Example 2 was carried out in the same manner as in Example 1, in which the upper polarizing plate was Positive A plate 24, coplanar delay (R〇) is 5 〇 nm, thickness retardation (Rth) is 25 nm, and refractive index (NZ) is 1.0. Further, a positive A plate 14 of a lower polarizing plate is used to manufacture a jpg mode liquid crystal display having a coplanar retardation (R〇) of 8 〇 nm, thickness retardation (Μ " is 40 nm, refractive index (NZ) is lo. Example 3 Example 3 was carried out in the same manner as in Example 1, in which the positive A plate 24' of the upper polarizing plate was coplanarly delayed (R0... 0, the thickness retardation (Rth) is 40 nm, and the refractive index (NZ) is 1 〇. Furthermore, the positive mode plate 14 of the lower polarizing plate 1 () is used to manufacture a milk mode night crystal display having a coplanar retardation (R0) of 8 〇nm, thickness retardation (Rth) 18 201200918 is 40 nm, and refractive index (NZ) is 1 〇. Example 4 Example 4 was carried out in the same manner as in Example 1, in which the positive A plate 24 of the upper polarizing plate 20 was coplanar. The retardation (R〇) is 8 〇 nm, the thickness retardation (Rth) is 40 nm, and the refractive index (NZ) is io. Further, the positive A plate 14 of the lower polarizing plate 10 is used to fabricate the ιρ§ mode liquid helium display, which The surface retardation (R0) was 50 nm, the thickness retardation (Rth) was 25 nm, and the refractive index (NZ) was io. Example 5 Example 5 was carried out in the same manner as in Example 1, in which the upper bias was performed. A positive plate 2〇 plate 24 'co-planar retardation (R〇) is 3〇nm, the thickness retardation (Rth) of 15nm, the refractive index (NZ) for the i.o. Furthermore, the positive A plate 14 of the lower polarizing plate 10 is used to manufacture the IPS mode liquid day. The device has a coplanar retardation (R〇) of 3 〇 nm and a thickness retardation (&) of 15 nm. (NZ) is 1.0. Example 6 20 Example 6 was carried out in the same manner as in Example 1, and the refractive index (NZ) of 5 nm was i.o. Further, the (10) mode liquid crystal display was fabricated using the square plate 14 of the lower polarizing plate 10, and the coplanar retardation was just 1 Gnm, and the thickness retardation was 5 nm in the order of 201200918 and the refractive index (NZ) was 1.0. Example 7 The same as in Example 1. In the manner of Example 7, the coplanar retardation (R〇) of the positive plate 24' of the upper polarizing plate 20 was ... such as a claw, the thickness retardation (Rth) was 50 nm, and the refractive index (NZ) was 1.0. The positive plate 14 of the lower polarizing plate 10 is used to fabricate an ips mode liquid crystal display having a coplanar retardation (R 〇) of 1 〇〇 nm and a thickness retardation of 50 nm 'refractive index (NZ) is lo. 10 Example 8 Again, by way of example Example 8 was carried out in the same manner as in Example 8, using a positive A plate 24 of the upper polarizing plate and a positive a plate 14 of the lower polarizing plate to produce a mode liquid crystal display having a coplanar retardation (R0) of 5 〇 nm and a thickness delay of 15 nm of 20 nm. 'Refractive index (NZ) is 〇, 9. Example 9 Further, Example 9 was carried out in the same manner as in Example 1, using the positive A plate 24 of the upper polarizing plate and the positive a plate 14 of the lower polarizing plate to manufacture the as mode 2 〇Liquid crystal display with coplanar retardation (R〇) of 50 nm, thickness retardation (R^) of 30 nm, and refractive index (NZ) I. Comparative Example 1 Using the same orientation as in Example 1, the comparative example 1 20 201200918 protective film was used to fabricate an IPS mode liquid crystal display having a coplanar retardation (R〇) of 1 nm and a thickness retardation (Rth) of 2nrn, replacing the positive plates 14 and 24 of the upper polarizing plate and the lower polarizing plate. 5 Comparative Example 2 Comparative Example 2 was carried out in the same manner as in Example 1 to fabricate an IPS mode liquid crystal display such that the absorption axis 22 and the positive a plate of the upper polarizer 21 were The fast axis 25 of 24 is perpendicular ' and the absorption axis 12 of the lower polarizer u is perpendicular to the fast axis 15 of the positive a plate 14. 10 Comparative Example 3 Comparative Example 3 was carried out in the same manner as in Example 1, in which the upper polarizing plate 20 was The positive A plate 24' coplanar retardation (R〇) is 5〇ηπι, the thickness retardation (Rth) is 25nm, and the refractive index (Νζ) is 1〇. 15 Furthermore, the isotropic protective film is used to manufacture the IPS mode liquid crystal display. The coplanar retardation (RO) was 1 nm, and the thickness retardation (Rth) was 2 nm, replacing the positive A plate 14 of the lower polarizing plate 10. Comparative Example 4 20 Comparative Example 4 was carried out in the same manner as in Example 1, using coplanar retardation (RO) is 1 nm and the thickness retardation (Rth) is 2 nm. The protective film ' replaces the positive a plate 14 of the upper polarizing plate 20. Further, the positive A plate 14 of the lower polarizing plate 10 is used to manufacture an ips mode liquid crystal display having a coplanar retardation (R 〇) of 5 〇 nm. The thickness retardation (Rth) 21 201200918 is 25 nm 'The refractive index (NZ) is ι·〇. Experimental Example 5 10 15 20 Examples and Comparative Examples The characteristics of the coupled polarizing plate group and the liquid crystal display manufactured by the following methods were measured by the following methods. (1) Polarization degree of liquid crystal display The V7100 is used to measure the degree of polarization of a 3〇x3〇mrn polarizing plate. (2) The amount of phase difference change of the polarizing plate group is 50. (: Temperature and 80% RH chamber (high temperature / high humidity chamber) to measure the phase difference of the coupled polarizing plate group, and measure the phase difference after three days. (3) The polarization state change of the liquid crystal display is measured on the Bangka ball. f=45. and 0=60. The polarization state changes in the oblique direction. (4) Whether the pollution occurs in the chamber of the consumable polarizing plate group (high temperature / three days after the visual coupling of the polarizing plate group is placed at a temperature of 50 ° C and 8 〇%rh to humidity to) to measure the phase difference between the polarizing plate group and check for contamination. [Standard of the degree of pollution generation] 0: Very little pollution △: Normally measured "degree of polarization measurement. See 22 201200918 The same range is shown in Fig. 6. Fig. 6 shows the phase difference change of the face polarizing plate groups used in Examples 1 to 7 and Comparative Examples 1 to 4. From Fig. 6, it can be seen that before the coupling polarizing plate group is placed in the high temperature and high humidity chamber And then, the amount of change in coplanar retardation and thickness retardation 5 is greatly different depending on whether or not stretching is performed. It can be seen that the amount of phase difference change when using the unstretched film is much larger than when the stretched film is used. The difference in the amount of difference in the combination of the stretched film and the unstretched film The combination of the stretched films. Further, Table 1 below shows the degree of contamination generation of the coupled partial light plate groups of Examples 1 to 7 and Comparative Example 1. It can be seen from Table 1 that the degree of contamination generation is in the use of the coupled polarizing plate of the present invention. Examples 1 through 7 are much smaller. Table 1
案例1 實例1 實例2 實例3 實例4 實例5 實例6 實例7 比較f你丨1 污染 程度 〇 〇 〇 〇 〇 〇 〇 X 圖7A至7C呈現實例1和比較實例丨和3所製造的 IPS液晶顯示器置入高溫和高濕度室後隨波長的透射比改 變測量。圖中’藍路徑的波長為430nm，紅路徑的波長為 63〇nm ’綠路徑的波長為430nm。 參照圖7 ’即使在置入高溫和高濕度室後，實例1的 麵合偏光板組也在所有波長（3〇〇至78〇ηηι)呈現均勻透 射比。另一方面，從比較實例1和3可看出透射比隨波長 而異。因此’因為透射比隨波長的改變低，故實例1在正 23 201200918 面和傾斜表面上有優良色感β 圖8Α呈現實例6和比較實例1#〇 4所製造之液晶顯 示器的偏振狀態改變。從圖8Α可看出使用同向性膜的比 較實例1和實例6呈現相同亮度。圖8八在邦加球上呈現 5 55〇nm的光依序通過第一偏光板10之偏光片11 (偏振狀 態1)、正A板（14)(偏振狀態2)、液晶胞3〇 (偏振狀態 3 )、正A板24 (偏振狀態4 )的偏振狀態改變。 圖8b呈現實m所製造之液晶顯示器的偏振狀態。 從圖8B的偏振狀態可看出亮度與圖8A相同（.見圖9 )。 1〇 目8C呈現比較實例2所製造之液晶顯示器的偏振狀 態。從圖8C可看出偏振狀態非常不同於本發明，這是因 為偏光片吸收軸和膜快軸彼此垂直。預期圖8C的偏振狀 態對確保視角和亮度程度改變有很大差異。 圖9呈現模擬來自實例丨至7和比較實例丨之所有光 15彳向之透射'匕的結果’彳看出亮度與使用同向性膜的比較 實例1相同。 圖1〇至13呈現來自實例8和9所製造的lps模式液 晶顯示器之所有光方向之偏振狀態和透射比的改變，可看 出非常類似於實例5。 2〇 也就是說，可看出折射率（NZ)為〇.9和hl的板呈 現與折射率（NZ)為1.0的正A板實質相同的特性。 雖然參照較佳實施例來說明本發明，但熟悉此技藝者 知道，可做各種修改和改變而不悖離申請專利範圍所界定 之本發明的範鳴。 24 201200918 【圖式簡單說明】 圖1是透視圖，呈現依據本發明之IPS模式液晶顯示器的 結構。 圖2是示意圖，呈現依據本發明之補償膜的折射率。 圖3是示意圖，呈現製程中的MD方向，以顯現依據本發 明之補償膜和偏光板的拉伸方向。 圖4是示意圖，呈現本發明座標系統之f和Θ所代表的因 素。 10 15 20 圖5呈現用於本發明實例i至7和比較實例i至4之耦合 偏光板的偏振測量。 圖6呈現用於本發明實例i至7和比較實例】至4之耦合 偏光板的偏振差改變。 。 圖7Α至7C呈現將實例1 (7Α)以及比較實例】和3 卩c)所製造❸ips模式液晶顯示器置於高溫和高濕度室 後所測量對波長的透射比改變。 圖8 A至8 C呈現實例6、比較實例1知4 / e Λ、— / 平乂夏例1和4 (8Α)、實例5 (8Β)、 比較實例 2 (8C)所 τρς 態改變。)製坆之㈣模式液晶顯示器的偏振狀 圖9呈現本發明實例1至7和比較竇 亞术目所有先方向的透射比。 圖1 〇和11呈現本發明實例8张制 器來自所有井方Γ 造之iPS模式液晶顯示 有先方向之偏振狀態和透射比的改變。 1 3呈現本發明實例 器來自所^ _ 9㈣造之IPS模式液晶顯示 w '方向之偏振狀態和透射比的改變。 25 201200918 【主要元件符號說明】 10 下 偏光板 11 偏 光 片 12 吸 收軸 13 保 護 膜 14 正 A板 15 快 軸 20 上 偏光板 21 偏 光 片 22 吸 收軸 23 保 護 膜 24 正 A板 25 快 軸 30 IP S液晶胞 40 背 光 26Case 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Comparison f You 丨 1 Pollution degree 〇〇〇〇〇〇〇 X Figures 7A to 7C present example 1 and comparative examples 丨 and 3 manufactured IPS liquid crystal display The transmittance is changed with the wavelength after the high temperature and high humidity chambers are placed. In the figure, the wavelength of the blue path is 430 nm, the wavelength of the red path is 63 〇 nm, and the wavelength of the green path is 430 nm. Referring to Fig. 7', the face-to-face polarizing plate of Example 1 exhibited a uniform transmittance at all wavelengths (3 Å to 78 〇ηηι) even after being placed in a high temperature and high humidity chamber. On the other hand, it can be seen from Comparative Examples 1 and 3 that the transmittance differs depending on the wavelength. Therefore, since the transmittance was low with the change of the wavelength, Example 1 had a good color sensation on the face and the inclined surface of Fig. 2 201200918. Fig. 8 shows the change in the polarization state of the liquid crystal display manufactured by Example 6 and Comparative Example 1#〇4. It can be seen from Fig. 8A that Comparative Example 1 and Example 6 using the isotropic film exhibited the same brightness. Figure 8 shows a light of 5 55 〇nm on the Bangka ball passing through the polarizer 11 (polarization state 1) of the first polarizing plate 10, the positive A plate (14) (polarization state 2), and the liquid crystal cell 3 ( In the polarization state 3), the polarization state of the positive A plate 24 (polarization state 4) changes. Figure 8b shows the polarization state of a liquid crystal display manufactured by real m. It can be seen from the polarization state of Fig. 8B that the luminance is the same as that of Fig. 8A (see Fig. 9). 1 〇 8C shows the polarization state of the liquid crystal display manufactured in Comparative Example 2. It can be seen from Fig. 8C that the polarization state is very different from the present invention because the polarizer absorption axis and the film fast axis are perpendicular to each other. It is expected that the polarization state of Figure 8C will make a large difference in ensuring a change in viewing angle and brightness level. Fig. 9 is a graph showing the results of the transmission of '匕 from all of the light from the examples 丨 to 7 and the comparative example 彳. 彳 The brightness is the same as that of the case of using the isotropic film. Figures 1A through 13 show changes in the polarization state and transmittance of all light directions from the lps mode liquid crystal display fabricated in Examples 8 and 9, which can be seen to be very similar to Example 5. 2〇 That is, it can be seen that the plate having the refractive index (NZ) of 〇.9 and hl exhibits substantially the same characteristics as the positive A plate having a refractive index (NZ) of 1.0. While the invention has been described with respect to the preferred embodiments, the embodiments of the present invention may be modified and modified without departing from the scope of the invention as defined by the appended claims. 24 201200918 [Schematic Description of the Drawings] Fig. 1 is a perspective view showing the structure of an IPS mode liquid crystal display according to the present invention. Figure 2 is a schematic diagram showing the refractive index of a compensation film in accordance with the present invention. Fig. 3 is a schematic view showing the MD direction in the process to visualize the stretching direction of the compensation film and the polarizing plate according to the present invention. Figure 4 is a schematic diagram showing the factors represented by f and Θ of the coordinate system of the present invention. 10 15 20 Fig. 5 presents polarization measurements for the coupled polarizing plates of the inventive examples i to 7 and comparative examples i to 4. Fig. 6 presents polarization difference changes for the coupling polarizing plates of the inventive examples i to 7 and comparative examples] to 4. . Figures 7A to 7C show the change in transmittance versus wavelength measured after placing the ❸ips mode liquid crystal display fabricated in Example 1 (7Α) and Comparative Example] and 3 卩c) in a high temperature and high humidity chamber. 8 to 8 C show the change of τρς state of Example 6, Comparative Example 1, 4 / e Λ, - / Ping Xia Xia 1 and 4 (8Α), Example 5 (8Β), and Comparative Example 2 (8C). The polarization of the (four) mode liquid crystal display of Fig. 9 shows the transmittances of all of the first directions of the inventive examples 1 to 7 and the comparative sinus. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 and Figure 11 show an example of the present invention. The 8-cell liquid crystal display from all wells has a change in polarization state and transmittance in the first direction. 1 3 shows an example of the present invention from the IPS mode liquid crystal display of the _ 9 (4) change in the polarization state and transmittance of the w ' direction. 25 201200918 [Main component symbol description] 10 Lower polarizing plate 11 Polarizer 12 Absorption axis 13 Protective film 14 Positive A plate 15 Fast axis 20 Upper polarizing plate 21 Polarizer 22 Absorption axis 23 Protective film 24 Positive A plate 25 Fast axis 30 IP S liquid crystal cell 40 backlight 26