1354126 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種提高正面對比度之廣視角偏光板的製 造方法、依該製造方法所得到之廣視角偏光板、具有該廣 視角偏光板之光學膜及具備該廣視角偏光板或光學膜之圖 像顯示裝置。 【先前技術】 近年，液晶顯示裝置廣泛普及化，但相較於CRT (Cathode 厌ay Tube)，缺乏良辨識之視角，視角擴大之必要性漸高漲。 視角之擴大方法係已提出一於液晶胞配置附設有複折射層 之偏光板的方法，（參照例如專利文獻1)。但，若使用該方 法’視角非常擴大，但有關正面對比度係已知較未設有複 折射層之偏光板差。 專利文獻1 :特開平6-174918號公報 【發明内容】 本發明係為解決前述課題而構成者，目的在於提供一種 正面對比度尚之廣視角偏光板的製造方法、依該製造方法 所得到之廣視角偏光板、具有該廣視角偏光板之光學膜及 具備該廣視角偏光板或光學膜之圖像顯示裝置。 本案發明人等為解決前述習知之問題點，經專心研究。 其結果，發現依如以下所示之廣視角偏光板的製造方法、 藉廣視角偏光板及具備廣視角偏光板之液晶顯示裝置可 達成前述目的，終完成本案發明。 為解決前述課題，本發明之廣視角偏光板的製造方法係 99251-1000801.doc 1354126 於透明性保護層之至少單面側具有：具有一含液晶聚合物 所構成之複折射層的光學補償膜、及偏光器；其特徵在於 :、有如下步驟·在68C〜125C之範圍内熱處理前述光學補 償膜的步驟；使冑述偏光器肖冑述光學補償膜以前述透明 性保護層作為接著面，而藉由接著劑貼合之步驟。 又，在前述熱處理之前，宜含有使具備前述複折射層之 透明性保護層進行鹼化處理之步驟。 進步宜使用碟狀液晶聚合物作為前述液晶聚合物。 進步且使用二乙醯基纖維素膜作為前述透明性保護 層。 又，為解決前述之課題，本發明之廣視角偏光板其特徵 在於·以廣視角偏光板之製造方法來製造者。 又，為解決前述之課題’本發明之光學膜其特徵在於： 前述廣視角偏光板至少疊層1片。 又，為解決前述之課題，本發明之圖像顯示裝置其特徵 在於：使用前述廣視角偏光板或光學膜。 【發明之效果】 本發明之廣視角偏光板的製造方法係在6814 25(>c之範 圍内熱處理形成有複折射層之透明性保護層（以下稱為光 學補償膜），俾複折射層之折射率差降低，降低正面方向之 相位差。其結果，可得到降低光洩漏的發生而抑制正面方 向之對比度降低的廣視角偏光板。 又，在前述熱處理之前，藉由使具備前述複折射層之透 明性保護層進行鹼化處理之步驟，於透明性保護層表面導 9925M000801.doc 1354126 #從基。透明性保護層為例如三乙酿基纖維素等之情形， :於其表面導人經基’使透明性S護層與偏光器藉接著 〜 '行接著時，可以透明性保護層表面之羥基與接著劑的 尹工基使虱結合。因此’可進一步提高以接著劑之接著效果。 。 秸由進行熱處理步驟，可省略一般鹼化處理後必須 進行之乾燥步驟。其結果’可謀求生產效率之提昇。' 具備藉刖述製造方法所得到之廣視角偏光板之液晶顯示 裝置係視角廣、且即使在顯示畫面的正面方向亦顯示高的 對比度等顯示特性優。 有關本發明之實施形態，說明於以下。 本發明之廣視角偏光板的製造方法係於透明性保護層之 至少單面側具有：具有一含液晶聚合物所構成之複折射層 的光學補償膜及偏光器；並且具有如下步驟·在68t〜i25t 2範圍内熱處理前述光學補償膜的步驟；使前述偏光器與 别述光學補償膜以前述透明性保護層作為接著面，而藉由 接著劑貼合之步驟。 此時，於偏光器之至少單面若設有前述光學補償膜，可 使用來作為廣視角偏光板，但於此相反側的面係目的在於 附加偏光器的保護或進一步光學性功能等，而宜形成疊層 適當的層之光學膜。此進行疊層之層係可舉例如：前述光 學補償膜、前述透明性保護層、黏著層、相位差板、硬塗 層、反射層或亮度提昇膜等。當疊層此等之層時，可以進 行直接塗布、或間接地使用黏著劑或接著劑等適當的方法 來進行疊層。 9925M000801.doc 1354126BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a wide viewing angle polarizing plate for improving front contrast, a wide viewing angle polarizing plate obtained by the manufacturing method, and optical having the wide viewing angle polarizing plate. A film and an image display device having the wide viewing angle polarizing plate or optical film. [Prior Art] In recent years, liquid crystal display devices have become widespread, but compared with CRT (Cathode), there is a lack of a good perspective, and the necessity of expanding the viewing angle is increasing. In the method of expanding the viewing angle, a method of arranging a polarizing plate with a birefringent layer attached to a liquid crystal cell has been proposed (see, for example, Patent Document 1). However, if the method is used, the viewing angle is greatly expanded, but the front contrast is known to be worse than that of the polarizing plate having no refraction layer. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for manufacturing a wide viewing angle polarizing plate having a front contrast ratio and a wide viewing angle obtained by the manufacturing method. A polarizing plate, an optical film having the wide viewing angle polarizing plate, and an image display device including the wide viewing angle polarizing plate or an optical film. The inventors of the present invention have studied intensively to solve the aforementioned problems. As a result, it has been found that the above-described object can be attained by the method for producing a wide viewing angle polarizing plate as shown below, the wide viewing angle polarizing plate, and the liquid crystal display device having the wide viewing angle polarizing plate, and finally completes the present invention. In order to solve the above problems, the method for producing a wide viewing angle polarizing plate of the present invention is 99251-1000801.doc 1354126 having an optical compensation film having a birefringent layer composed of a liquid crystal polymer on at least one side of the transparent protective layer. And a polarizer; the method includes the steps of: heat-treating the optical compensation film in the range of 68C to 125C; and using the transparent protective layer as a bonding surface in the optical compensation film. And the step of bonding by means of an adhesive. Further, before the heat treatment, it is preferred to include a step of alkalizing the transparent protective layer having the above-mentioned birefringent layer. It is preferable to use a discotic liquid crystal polymer as the aforementioned liquid crystal polymer. Progressive and use of a diethyl fluorene-based cellulose film as the aforementioned transparent protective layer. Further, in order to solve the above-described problems, the wide viewing angle polarizing plate of the present invention is characterized in that it is manufactured by a method of manufacturing a wide viewing angle polarizing plate. In order to solve the above-mentioned problems, the optical film of the present invention is characterized in that at least one of the wide viewing angle polarizing plates is laminated. Moreover, in order to solve the above-described problems, the image display device of the present invention is characterized in that the wide viewing angle polarizing plate or the optical film is used. [Effects of the Invention] The method for producing a wide viewing angle polarizing plate of the present invention is a heat-resistant protective layer (hereinafter referred to as an optical compensation film) formed by heat-treating a birefringent layer in the range of 6814 25 (>c), and a birefringent refraction layer. The difference in refractive index is lowered, and the phase difference in the front direction is lowered. As a result, a wide viewing angle polarizing plate which reduces the occurrence of light leakage and suppresses a decrease in contrast in the front direction can be obtained, and the above-described birefringence is provided before the heat treatment. The step of alkalizing the transparent protective layer of the layer is carried out on the surface of the transparent protective layer, and the surface of the transparent protective layer is, for example, triethyl styrene cellulose, etc., on the surface thereof. When the transparent layer S and the polarizer are passed through the base, the hydroxyl group on the surface of the transparent protective layer can be bonded to the enamel of the adhesive agent. Therefore, the effect of the adhesive can be further improved. The straw is subjected to a heat treatment step, and the drying step which must be performed after the general alkalization treatment can be omitted. The result 'can improve the production efficiency.' The liquid crystal display device of the wide viewing angle polarizing plate obtained by the manufacturing method has a wide viewing angle and excellent display characteristics such as high contrast even in the front direction of the display screen. The embodiment of the present invention will be described below. The viewing angle polarizing plate is manufactured by having an optical compensation film and a polarizer having a birefringent layer composed of a liquid crystal polymer on at least one side of the transparent protective layer; and having the following steps: in the range of 68t to i25t 2 a step of internally heat-treating the optical compensation film; and the step of bonding the polarizer and the optical compensation film described above with the transparent protective layer as a bonding surface by an adhesive. At this time, at least one side of the polarizer The optical compensation film is provided to be used as a wide viewing angle polarizing plate, but the surface on the opposite side is intended to provide protection of a polarizer or a further optical function, and it is preferable to form an optical film in which an appropriate layer is laminated. The layer to be laminated may be, for example, the optical compensation film, the transparent protective layer, the adhesive layer, the phase difference plate, the hard coat layer, or the like. A reflective layer, a brightness enhancement film, etc. When these layers are laminated, they may be laminated by direct coating or indirectly using an adhesive or an adhesive, etc. 9925M000801.doc 1354126
於前述透明性保護層疊層複折射層之光學補償膜，係可 依以往習知之各種方法來製作。例如，於透明性保護層上 形成一已擦磨處理之配向膜後，於配向膜上塗布液晶聚合 物等，進行熱處理或紫外線硬化等。藉此，可形成含有特 定配向狀態之液晶聚合物所構成之複折射層。又，透明性 保護層與複折射層宜在於密接狀態^複折射層之疊層亦可 在透明性保護層之兩面側進行。此時，在與偏光器之接著 面側係可進一步設有其他之透明性保護層。 複折射層係具有以膜之相位差修正複折射（光的變形）的 光學補償功能，該複折射係在光透過液晶胞之過程發生 的。複折射層之相位差特性等係藉控制其層厚度而適當設 定。複折射層之相位差係可藉在厚度方向或面内方向之液 晶聚合物的配向狀態、在厚度方向之主折射率方向相對於 液晶層法線方向之傾斜角'或層厚等來控制。 複折射層之層厚宜為卜5 的範圍内’更宜為2〜3㈣之 範圍内。若層厚為此等的範圍内’可謀求對於視角變化之 補償效果、或複折射率差因波長分散產生的著色化抑制等 引起的良辨識性視角擴大。又，正面方向之相位差宜為 ίο〜2〇〇細的範圍内’更宜為15〜15〇n_範圍内。 前述液晶聚合物並無特別限定，可採用以往習知者，作 在本發明中宜為碟狀液晶聚合物。藉碟狀液晶聚合物構成 複折射層時，複折射層係碟狀液晶聚合物成為傾斜配向或 混成配向之構造。X ’碟狀液晶聚合物係依辨識性之改盖 效果等、亦即液晶胞從垂直方向之視角變化而使遲相軸方 99251-1000801.doc 1354126 向改變，藉此，在與廣視角偏光板之透過轴之間的遲相轴 的平行關係或正交關係會產生偏移，而依據其偏移量，顯 現光學各向異性（對應於補償之相位差）。 則述碟狀液晶聚合物係可舉例如以下述化學式所示者 等： ’、 ：ψ：The optical compensation film of the above-mentioned transparent protective laminated layer birefringent layer can be produced by various conventional methods. For example, after a rubbing-treated alignment film is formed on the transparent protective layer, a liquid crystal polymer or the like is applied onto the alignment film, followed by heat treatment or ultraviolet curing. Thereby, a birefringent layer composed of a liquid crystal polymer having a specific alignment state can be formed. Further, it is preferable that the transparent protective layer and the birefringent layer are in a close contact state, and the lamination of the birefringent layer may be performed on both sides of the transparent protective layer. At this time, another transparent protective layer may be further provided on the side opposite to the polarizer. The birefringent layer has an optical compensation function for correcting birefringence (deformation of light) by the phase difference of the film, which occurs during the passage of light through the liquid crystal cell. The phase difference characteristics of the birefringent layer and the like are appropriately set by controlling the thickness of the layer. The phase difference of the birefringent layer can be controlled by the alignment state of the liquid crystal polymer in the thickness direction or the in-plane direction, the inclination angle of the main refractive index direction in the thickness direction with respect to the normal direction of the liquid crystal layer, or the layer thickness. The layer thickness of the birefringent layer is preferably in the range of 'b', more preferably 2 to 3 (four). When the layer thickness is within the range of the above, it is possible to obtain a good visibility angle of view due to the compensation effect of the change in the viewing angle or the suppression of the coloration of the complex refractive index difference due to the wavelength dispersion. Further, the phase difference in the front direction is preferably in the range of ίο~2 〇〇, and more preferably in the range of 15 to 15 〇 n_. The liquid crystal polymer is not particularly limited, and conventionally known ones are preferred. In the present invention, a liquid crystal polymer is preferred. When the discotic liquid crystal polymer constitutes the birefringent layer, the birefringent layer is a structure in which the discotic liquid crystal polymer is inclinedly aligned or mixed. The X'-disc liquid crystal polymer is modified according to the recognition effect, that is, the liquid crystal cell changes from the vertical direction of view, and the retardation axis 99251-1000801.doc 1354126 is changed, thereby polarizing with a wide viewing angle. The parallel or orthogonal relationship of the slow axis between the transmission axes of the plates produces an offset, and depending on the offset, the optical anisotropy (corresponding to the compensated phase difference) is exhibited. The discotic liquid crystal polymer is, for example, represented by the following chemical formula: ’, :ψ:
R (其中 ’ R為 n-C7H15C00-)。R (where 'R is n-C7H15C00-).
於透明性保護層之單面或雙面以液晶聚合物形成碟狀液 B曰層係例如依需要，於已配向處理之透明性保護層上展 開液聚合物而形成配向於特定之碟狀液晶層的層之方法 等依I知之方法來進行。因此，在液晶聚合物展開之際， 係依需要而可形成以溶劑產生的溶液、或以加熱產生的炼 融液等又，备使液晶聚合物之固化層配向於碟狀液晶層 時，依需要而亦可加熱處理至玻璃轉移溫度以上等。H 又對於則述透明性保護層之配向處理，係可舉例：使 聚醯亞胺'聚乙烯醇'聚酯、聚丙烯酸酯、聚醯胺醯亞胺、 或聚賴亞胺等之附設m關縈布等經擦摩冑理之配向 膜、或設有由Si〇等之斜向蒸鍍層等所構成的適當配向膜之 方式、藉離子束等斜向蝕刻之方式等。 由液晶聚合物所構成的複折射層一般係從偏光板形成時 之遲相轴方向的控制性等之點，預先設於透明性保護層而 將其供給於偏光板形成之方式。所設置之複折射層的厚度 99251-1000801.doc 1354126 係可依相位差特性等而適當決 聚合物之厚度方向或面内方向 主折射率方向相對於液晶層法 控制。 定，其相位差係可藉在液晶 的配向狀態或在厚度方向之 線方向之傾斜角或層厚等來 又’於透明性保護層之兩面設有複折射層時，各複折射 層係形成使同種或異種之液晶聚合物重疊者。Forming a liquid-like polymer on one or both sides of the transparent protective layer to form a liquid-like liquid B layer, for example, if necessary, developing a liquid polymer on the transparent protective layer that has been aligned to form a specific disc-shaped liquid crystal The method of the layer of the layer or the like is carried out by a method known per se. Therefore, when the liquid crystal polymer is developed, a solution generated by a solvent or a smelting liquid generated by heating may be formed as needed, and when the cured layer of the liquid crystal polymer is aligned to the liquid crystal layer, If necessary, it may be heat treated to a temperature above the glass transition temperature. H. For the alignment treatment of the transparent protective layer, for example, a polyimine imine 'polyvinyl alcohol' polyester, a polyacrylate, a polyamidimide, or a polylysine may be attached. An alignment film which is rubbed by a rubbing or the like, or a suitable alignment film made of an oblique vapor deposition layer such as Si crucible, or the like, which is obliquely etched by an ion beam or the like. The birefringent layer composed of the liquid crystal polymer is generally provided in a transparent protective layer and supplied to a polarizing plate in order to control the retardation direction in the direction in which the polarizing plate is formed. The thickness of the birefringent layer to be provided is 99251-1000801.doc 1354126. The thickness direction or in-plane direction of the polymer can be appropriately determined depending on the phase difference characteristics and the like. The main refractive index direction is controlled with respect to the liquid crystal layer method. The phase difference can be formed by the alignment angle of the liquid crystal or the inclination angle or layer thickness of the line direction in the thickness direction, and when the birefringent layer is provided on both sides of the transparent protective layer, each of the birefringent layers is formed. A person who overlaps the same or different liquid crystal polymer.
前述透明性保護層係可以㈣之塗布層或保護膜之疊層 物等而適當形成。尤其’較佳係使用透明性、機械性強度、 熱安定性、水分遮蔽性及各向相等性優之塑膠等。透明性 保護層之材料係可舉例如：聚對苯二甲酸乙二酯或聚萘二 甲酸乙二SI等之聚s旨系聚合物、聚苯乙婦或丙稀猜/苯乙稀 共聚合物（AS樹脂）等之苯乙烯系聚合物、二乙醯基纖維素 或三乙醯基纖維素等之纖維素系聚合物、聚醚砜系聚合 物、聚碳酸酯系聚合物、聚醯胺系聚合物、聚醯亞胺系聚 合物、聚烯烴系聚合物、或聚曱基丙烯酸甲酯等之丙烯酸 系聚合物等。又，亦可舉例：聚乙烯、聚丙烯、具有環系 乃至冰片烯構造之聚烯烴、如此烯/丙烯共聚合物之聚烯烴 系聚合物、氣化乙烯系聚合物、耐隆或芳香族聚醯胺等之 蕴胺系聚合物、醯亞胺系聚合物、颯系聚合物、聚醚砜系 聚合物、聚醚醚酮系聚合物、聚苯醚系聚合物、乙烯醇系 聚合物、偏氣乙烯系聚合物、乙烯基丁醛系聚合物、烯丙 酸醋系聚合物、聚氧亞甲基系聚合物、環氧基系聚合物、 或前述聚合物之混合物等。其他可舉例：丙烯酸系、氨基 曱酸S旨系、丙稀酸氨基甲酸酯系、環氧基系或石夕酮系等之 99251-100080l.doc 1354126 熱硬化型或紫外線硬化型的樹脂等。 又’記載於特開2001-343 529號公報（WOO 1/37007)之聚合 物膜係可舉例如：含有（A)於側鏈具有取代及/或非取代醯亞 胺基之熱塑性樹脂、與（B)於側鏈具有取代及/或非取代苯基 及腈基之熱塑性樹脂的樹脂組合物。具體上可舉例：由異 丁烯與N-曱基馬來酿亞胺所構成之交互共聚合物與丙烯腈 /苯乙烯共聚合物之樹脂組合物的膜。膜係可使用由樹脂組 合物的混合押出品等所構成之膜。此等之膜係相位差小， 光彈性係數小，故可解決偏光板之變形所產生的不均勻等 之不佳情形，又，因透濕度小，故加濕耐久性優。 透明性保護層係相位差儘可能地愈小愈佳。又，若考量 如此之觀點與偏光特性及耐久性等，宜使用纖維素聚合 物。進一步，纖維素系聚合物之中，宜為三乙醯基纖維素。 又，藉由含有微粒子，亦可使用其表面形成微細凹凸構造 之透明性保護層。 又，透明性保護層係愈薄愈佳。相位差乃以光學補償膜 的折射率差（Δη: nx-ny)與層厚（d)之積（Δηά)來決定。若考慮 對偏光器之保護性等，透明性保護層之層厚一般為5〇〇 pm 以下，宜為5〜300 μιη，更宜為10〜200 μιη。 於偏光器之雙面設有透明性保護層時，係亦可形成由其 表背相同之聚合物材料所構成的透明性保護層，亦可使用 由相異之聚合物材料等所構成的透明性保護層。 本發明之廣視角偏光板的製造方法係於前述熱處理步驟 之刖，可進行具備複折射層之透明性保護層的鹼化處理。 9925M00080l.doc -12· 1354126 鹼化處理係例如使透明性保護層浸潰於鹼水溶液中的方 法。藉此，可於透明性保護層的表面導入羥基，並於與使 用後述接著劍之偏光器的接著上提高接著絲。所使用之 鹼並無特別限定，宜使用例如氫氧化鈉或氫氧化鉀等。在 本步驟中，依需要，亦可進行以水之洗淨或以酸之中和。 使具備前述複折射層之透明性保護層亦即光學補償膜進 行熱處理之步驟係以複折射層之正面相位差（Δη(ΐ)的降低 作為第1意旨的目的。亦即’認為係藉熱處理，使在複折射 層之液晶聚合物再排列者。因此，此液晶聚合物之再排列 係降低排列之混亂，使排列狀態與熱處理前比較而更規 則。因此，複折射層之折射率差會降低，減少正面方向之 相位差。例如，使光學補償膜斜向通過後，減少受散亂朝 顯示晝面之正面方向進行的第丨光線、與使光學補償膜垂直 地通過後，亦直接朝顯示晝面的正面方向進行之第2光線的 相位差（於正面方向之相位差）之值的差。藉此，可極力以光 學補償膜補償第1光線，抑制朝外部冬射出。其結果，可得 到降低光洩漏之發生而抑制正面方向的對比度降低之廣視 角偏光板。 又，本步驟之目的係進行鹼化處理後之鹼水溶液的乾 燥。藉此，不增加步驟數，而複折射層之熱處理成為可能， 可抑制生產效率之降低。 熱處理之溫度宜在68°C〜125。(：之範圍内實施，更宜為 90 C〜110°C的範圍内，尤宜為95°C〜1051的範圍内。若前 述熱處理之溫度不足68。(：，正面相位差之降低會不充分， 9925M000801.doc 13 比 4126 有無法谋求對比度提昇之不佳情形。另一方面，若超過 125°C，光學補償膜之熱收縮會變大。其結果，貼合透明性 保護層與偏光器而製作廣視角偏光板後，再加工成任意的 大小時’廣視角偏光板之端面會被破壞，造成顯示不良。 …、處理之時間右為長時間，因與上述相同之理由，會發生 顯示不良，故必須處理適當的時間。較佳係秒更佳 係10〜120秒之範圍内。又，若以上的熱處理條件進行熱處 理，刚述光學補償膜之正面方向的相位差值（△“）可降低 20〜40%左右。例如正面方向之相位差當初為3〇 時熱 處理後成為20〜25 nm 〇 使則述偏光器與具備前述複折射層之透明性保護層的貼 T步驟，係以透明性保護層作為接著面而使用接著劑來實 施。為了防止複折射層之遲相軸與偏光器的透過軸的軸關The transparent protective layer may be suitably formed by a coating layer of (4), a laminate of a protective film, or the like. In particular, it is preferable to use a plastic having excellent transparency, mechanical strength, thermal stability, moisture shielding property, and excellent equivalence. The material of the transparent protective layer may be, for example, polyethylene terephthalate or polyethylene naphthalate, such as poly(ethylene) or polystyrene or styrene copolymer. a styrene polymer such as an AS resin, a cellulose polymer such as diethyl hydrazine cellulose or triethylene fluorenyl cellulose, a polyether sulfone polymer, a polycarbonate polymer, or a polyfluorene. An amine-based polymer, a polyimide-based polymer, a polyolefin-based polymer, or an acrylic polymer such as polymethyl methacrylate. Further, examples thereof include polyethylene, polypropylene, polyolefin having a ring system or a norbornene structure, a polyolefin polymer such a olefin/propylene copolymer, a vaporized ethylene polymer, an endurance or aromatic polymerization. An amine-based polymer such as guanamine, a quinone-based polymer, a fluorene-based polymer, a polyether sulfone-based polymer, a polyetheretherketone-based polymer, a polyphenylene ether-based polymer, or a vinyl alcohol-based polymer. A mixture of a vinylidene polymer, a vinyl butyral polymer, an acrylic acid vinegar polymer, a polyoxymethylene polymer, an epoxy polymer, or a mixture of the above polymers. Other examples include acrylic acid, amino phthalic acid S, acrylic acid urethane type, epoxy group or oleanyl group, 99251-100080 l.doc 1354126, heat curing type or ultraviolet curing type resin, etc. . Further, the polymer film of JP-A-2001-343 529 (WOO 1/37007) may, for example, be a thermoplastic resin containing (A) a substituted and/or unsubstituted quinone imine group in a side chain, and (B) A resin composition having a thermoplastic resin having a substituted and/or unsubstituted phenyl group and a nitrile group in a side chain. Specifically, a film of a resin composition of an interactive copolymer and an acrylonitrile/styrene copolymer composed of isobutylene and N-fluorenyl-maleimine can be exemplified. As the film system, a film composed of a mixed product of a resin composition or the like can be used. These film systems have a small phase difference and a small photoelastic coefficient, so that the unevenness caused by the deformation of the polarizing plate can be solved, and the moisture permeability is excellent because the moisture permeability is small. It is better that the phase difference of the transparent protective layer is as small as possible. Further, in consideration of such viewpoints, polarization characteristics, durability, and the like, a cellulose polymer is preferably used. Further, among the cellulose-based polymers, triethylsulfonyl cellulose is preferred. Further, by containing fine particles, a transparent protective layer having a fine uneven structure formed on the surface thereof can also be used. Moreover, the thinner the transparent protective layer is, the better. The phase difference is determined by the product of the refractive index difference (Δη: nx-ny) of the optical compensation film and the layer thickness (d) (Δηά). The thickness of the transparent protective layer is usually 5 〇〇 pm or less, preferably 5 to 300 μm, more preferably 10 to 200 μm, in consideration of the protection of the polarizer or the like. When a transparent protective layer is provided on both sides of the polarizer, a transparent protective layer composed of the same polymer material as the front and back may be formed, and a transparent polymer material or the like may be used. Protective layer. The method for producing a wide viewing angle polarizing plate of the present invention is an alkalization treatment for performing a transparent protective layer having a birefringent layer after the heat treatment step. 9925M00080l.doc -12· 1354126 The alkalization treatment is, for example, a method in which a transparent protective layer is impregnated into an aqueous alkali solution. Thereby, a hydroxyl group can be introduced on the surface of the transparent protective layer, and the bonding yarn can be raised next to the polarizer using the sword which will be described later. The base to be used is not particularly limited, and for example, sodium hydroxide or potassium hydroxide is preferably used. In this step, it may be washed with water or neutralized with acid as needed. The step of heat-treating the optical compensation film, which is the transparent protective layer having the above-mentioned birefringent layer, is the first purpose of the reduction of the front phase difference (Δη(ΐ) of the birefringent layer. Therefore, the liquid crystal polymer in the birefringent layer is rearranged. Therefore, the rearrangement of the liquid crystal polymer reduces the disorder of the alignment, so that the alignment state is more regular than that before the heat treatment. Therefore, the refractive index difference of the birefringent layer is Decreasing and reducing the phase difference in the front direction. For example, after the optical compensation film is obliquely passed, the second light that is scattered toward the front surface of the display surface is reduced, and the optical compensation film is passed vertically. The difference between the values of the phase difference (phase difference in the front direction) of the second light rays in the front direction of the pupil plane is displayed. Thereby, the first light ray can be compensated with the optical compensation film as much as possible, and the winter is prevented from being emitted to the outside. A wide viewing angle polarizing plate which reduces the occurrence of light leakage and suppresses a decrease in contrast in the front direction can be obtained. Further, the purpose of this step is to perform an alkalized aqueous solution after alkalizing treatment. Drying. Thereby, the number of steps is not increased, and the heat treatment of the birefringent layer becomes possible, and the reduction of the production efficiency can be suppressed. The temperature of the heat treatment is preferably in the range of 68 ° C to 125 ° ((:), more preferably 90 C~ In the range of 110 ° C, it is particularly preferably in the range of 95 ° C to 1051. If the temperature of the heat treatment is less than 68 (:: the decrease in the front phase difference is insufficient, and the 9925M000801.doc 13 may not be improved in contrast to 4126 On the other hand, when it exceeds 125 ° C, the thermal shrinkage of the optical compensation film becomes large. As a result, the transparent protective layer and the polarizer are bonded to each other to form a wide viewing angle polarizing plate, and then processed into an arbitrary one. In the big hour, the end face of the wide viewing angle polarizing plate will be destroyed, resulting in poor display. ... The processing time is right for a long time. For the same reason as above, display failure will occur, so it is necessary to process the appropriate time. More preferably, it is in the range of 10 to 120 seconds. Further, if heat treatment is performed under the above heat treatment conditions, the phase difference (Δ") in the front direction of the optical compensation film can be reduced by about 20 to 40%. When the phase difference of the direction is 3 当, the heat treatment is 20 to 25 nm, and the step of attaching the polarizer and the transparent protective layer having the above-mentioned birefringent layer is followed by using a transparent protective layer as a bonding surface. In order to prevent the axis of the complex phase of the birefringent layer from the axis of the polarizer
本步驟係宜在熱處理之後實施 。更詳而言之，係宜在熱This step is preferably carried out after the heat treatment. In more detail, it is better to be hot.
莫亦可一次捲取後與偏光器貼 處理 後經 嚮， 濕， 合。 月1j述接著劑並無特別限定， 具體上可使用例如由丙烯酸 99251-100Q80l.doc 1354126 系、矽酮系、聚酯系、聚胺基甲酸酯系、聚酯系或橡膠系 等所構成之透明感壓接著劑等的適當接著劑。此等接著劑 之中，為防止偏光器或光學補償膜具有之光學特性變化， 係當接著劑硬化或乾燥時，宜為在高溫之製程、或在長時 間之硬化處理或不須要乾燥者。又，亦宜在加熱或加濕條 件下不產生剝離等之接著劑。 從前述之觀點尤宜為丙烯酸系感壓接著劑。丙烯酸系感 壓接著劑係與其他之接著劑比較，而在透明性、耐天候性 及耐熱性等之點亦優，故從此等之點亦適宜。如此之丙稀 酸系感壓接著劑並無特別限定，可例示如以（曱基）丙稀酸丁 醋、（甲基）丙烯酸甲酯、（曱基）丙烯酸乙酯、（曱基）丙烯酸 之單體作為成分，重量平均分子量為10萬以上，玻璃轉移 溫度為o°c以下的丙烯酸系聚合物作為基礎聚合物者。又， 複折射層與透明性保護層之折射率分別不同時，從反射損 之抑制4觀點，前述接著劑宜顯示兩者之折射率的中間值 者。 前述偏光器係可使用能得到特定之偏光狀態的光之適當 者尤其，且可侍到直線偏光狀態之透過光的偏光器。如 此之偏光器並無特別限定，可例示如：聚乙烯醇系膜、部 分曱縮醱化聚乙烯醇系膜、乙烯/醋酸乙烯共聚分物系部分 鹼化膜的親水性聚合物膜吸附碘及/或雙色性染料而延伸 者、如聚乙缔㈣之脫水處理物、或聚氯化乙稀之脫鹽酸 處理物的聚烯配向膜等。此等之偏光器中，以峨吸附之延 伸聚乙烯醇系m、雙色性染料等的雙色性物質所構成之偏 9925I-100080I.doc 1354126 光器尤佳。因可得到偏光度高之直線偏光》 聚乙烯醇系膜系可適當使用以溶解於水或有機溶劑之原 液垂流成膜的垂流法、澆鑄法、押出法等之任意的方法使 聚乙烯醇系樹脂成膜者。聚乙烯醇系樹脂的聚合度宜為 100〜5000左右，更宜為1400〜4000。 又，在不使前述透明性保護層之偏光器接著的面，亦可 實施形成硬塗層之步驟或防止反射處理、防止黏附、或以 不擴散、抗炫光為目的之處理。 硬塗處理係目的在於實施偏光板表面之損傷抑制等。例 如，可以附加於透明性保護層之表面的方式等形成例如丙 烯酸系、矽酮系等之適當紫外線硬化型樹脂的硬度或平滑 特性等優之硬化皮膜。X ’防止反射處理係目的在於實施 偏光板表面之外光的防止反射者，可依習知之防止反射膜 等的形成來達成。防止㈣處理係目的在於實施與鄰接層 之在、接抑制。 ’抗炫光處理係、目的在於：避免在偏光板之表面外夫 會反=而阻礙偏光板穿透光之辨識等。例如，以喷砂方式 或雕花加工方式之粗面化方式或透明微粒子的調配方式等 ^適宜方式於透明性保護層的表面賦予微細凹凸構造來形 :广述表面微細凹㈣造之形成所含有的微粒子係可 i例如由平均粒徑為G.5〜2G㈣氧切、氧化紹、氧化 之導錫、氧化铜、氧化録、氧化録等所構成 構成之好、由交聯或未交聯之聚合物等所 系微粒子等的透明微粒子。形成表面微細凹凸 9925M00080I.doc 1354126 構造時，微粒子之使用量係相對於形成表面微細凹凸構造 之透明樹脂100重量份一般宜為2〜70重量份左右，宜為5〜5〇 重量份。抗炫光層係亦可兼具使偏光板穿透光擴散而用以 擴大視角等之擴散層（視角擴大功能等）。 又，前述防止反射層、防止黏附層、擴散層或抗炫光層 等，除可設於透明性保護層其本身外，尚可作為其他用途 光學層而與透明性保護層形成不同體者。 _ 在以上之態樣中，係可使用本發明之廣視角偏光板作為 穿透型者。但，本發明不限於此，可依照用途等而使用來 作為與其他之光學層疊層之光學膜。有關光學層係並特別 限定，但使用例如反射板或半穿透板、或相位差板（含1/2 或1/4等之波長板）等液晶顯示裝置等所使用之光學層1層或 2層以上。更詳而言之，於本發明之廣視角偏光板疊層反射 板或半穿透反射板，而可使用來作為反射型偏光板或半穿 透型偏光板。又，於本發明之廣視角偏光板疊層相位差板， φ 亦可使用來作為橢圓偏光板或圓偏光板。進一步，亦可使 用來作為於本發明之廣視角偏光板疊層亮度提高膜之偏光 板。 反射型偏光板係於廣視角偏光板設有反射層者’可適用 於-來自辨識側(顯示側)之入射光反射而顯示的反射液晶 顯示裝置。反射型偏光板的形成係可以在與複声最 層之側相反側的透明性保護層附設由金屬等所構成二反二 層等的適當方式來實施。更詳而言之，例如，依需要，在 經消光處理之保護膜等的透明性保護層之單面，附設由銘 9925M000801.doc 17 1354126 等的反射性金屬所構成的箔或蒸鍍膜者。又，以前述透明 性保護層含有徑粒子之表面微細凹凸構造上以蒸鍍方式或 電鍍方式等的適當方式附設金屬反射層者等。前述微細凹 凸構造之反射層係使入射光藉亂反射擴散而防止映入或亂 反射’具有可抑制明暗不均勻的優點等。又，含有微粒子 之透明性保護層係亦具有當入射光及其反射光穿透其之時 被擴散而可更抑制明暗不均勻之優點等。反映透明性保護 層面微細凹凸構造之微細凹凸構造的反射層之形成，係可 藉例如真空蒸鍍方式、離子佈植方式、濺鍍方式等的蒸鍍 方式或電鍍方式等之適當方式直接使金屬附設於透明性保 護層之表面的方法等來進行。 又’反射型偏光板係直接形成於前述廣視角偏光板之透 明性保護層的態樣取而代之，亦可使用來作為依其透明性 保護層之適當膜設有反射層而成的反射片等。又，反射層 一般由金屬所構成，故其反射面被透明性保護層或廣視角 偏光板等覆蓋之狀態的使用形態乃防止受氧化造成的反射 率的降低。進一步，使初期反射率經長期而持續，亦可避 免對反射層另外疊層保護層。 半穿透型偏光板係可藉由於上述以反射層反射且形成進 行穿透之半透鏡等之半穿透型的反射層來得到。半穿透型 偏光板一般係設於液晶胞之背面側。在明亮的環境下使用 具備如此之半穿透型偏光板的半穿透型液晶顯示裝置時， 利用從辨識側（顯示面側）入射之外光作為顯示光，在暗的環 境下使用時，係使用來自背光等之光作為顯示光。因而， 99251-1000801.doc . jg. 1354126 可謀求消費電力之降低。 說明有關於廣視角偏光板進一步疊層相位差板而成之橢 圓偏光板或橢圓偏光板。使直線偏光改變成橢圓偏光或圓 偏光’或使橢圓偏光或圓偏光改變成直線偏光，或改變直 線偏光之偏光方向時’可使用相位差板等。尤其，使直線 偏光改變成圓偏光’或使圓偏光改變成直線偏光之相位差 板，可使用所謂1/4波長板（亦可謂λ/4板）。1/2波長板（亦可 謂λ/2板）一般係可使用於改變直線偏光之偏光方向的情形。 橢圓偏光板係藉例如STN (Super Twisted Nematic)模式的液晶 顯示裝置之液晶層的複折射補償（防止）所產生之著色（藍或 黃）’而可有效地使用於無前述著色之黑白顯示的情形等。 進一步，控制三次元之折射率者係亦可補償（防止）從斜方向 看到液晶顯示裝置之畫面時所產生的著色而佳。圓偏光板 係可有效地使用於調整例如圖像成為彩色顯示之反射型液 晶顯示裝置的圖像之色調情形等，又亦具有防止反射的功 能。上述之相位差板的具體例，係可舉例：聚碳酸酯、聚 乙烯醇、聚苯乙烯、聚甲基丙烯酸曱酯、聚丙烯或其他之 聚烯烴、聚芳酸酯、聚醯胺之適當聚合物所構成的薄膜經 延伸處理而成的複折射性膜或液晶聚合物配向膜、液晶聚 合物的配向層以薄膜支樓者等。相位差板係亦可為具有適 當的相位差者，此相位差係依照以例如各種波長板或液晶 層的複折射產生之著色或視角等的補償作為目的者等之使 用目的，亦可為疊層2種以上之相位差板而控制相位差等的 光學特性者等。 99251-1000801.doc •19- 1354126 又，上述橢圓偏光板或反射型橢圓偏光板係以適當組合 疊層廣視角偏光板或反射型偏光板與相位差板者。如此之 橢圓偏光板等係可以成為（反射型）偏光板與相位差板之組 合的方式將此等於液晶顯示裝置之製造過程依序個別地疊 層亦可形成，但如前述般預先形成橢圓偏光板等之光學膜 者係具有品質之安定性或疊層作業性等優而可提昇液晶顯 示裝置等的製造效率之優點。 貼合廣視角偏光板與亮度提昇膜之偏光板，通常係可設 於液晶胞之背面側而使用。亮度提昇膜係若藉液晶顯示裝 置等之背光或來自背侧之反射等自然光入射，使特定偏光 轴之直線偏光或特定方向之圓偏光反射，其它之光係顯示 穿透之特性，故使亮度提高膜與廣視角偏光板疊層之偏光 板，係使來自背光等之光源的光入射而得到特定偏光狀態 的穿透光，同時並且前述特定偏光狀態以外之光係不穿透 而反射。在此亮度提昇膜面反射之光經由進一步設於其後 側之反射層等’反轉再入射於亮度提昇膜，使其一部分或 全。卩穿透成為特定偏光狀態之光而謀求使亮度提昇膜穿透 之光的增量，同時並供給很難被偏光器吸收之偏光而可利 用於液晶圖像顯示等之光量增大，俾可提高亮度者。亦即， 不使用亮度提昇膜，而以背光等從液晶胞之背側通過偏光 器而使光入射時，係具有不一致於偏光器之偏光軸的偏光 方向之光，係幾乎被偏光器吸收，不穿透偏光器。亦即， 亦依存於所使用之偏光器的特性，但約5〇%之光會被偏光 器吸收其蛉，可利用於液晶圖像顯示等之光量會減少， 9925M000801.doc •20· 圖像變暗。亮度提昇膜係使具有如被偏光器吸收之偏光方 向的光不入射於偏光器，而在亮度提昇膜暫時反射，進一 步藉由設於其後側之反射層等而反轉，再入射於亮度提昇 膜’反覆此，在兩者之間進行反射、反轉之光的偏光方向 只成為如可通過偏光器之偏光方向的偏光透過亮度提昇膜 而供給至偏光器’故可使背光等之光有效率地使用於液晶 顯示裝置之圖像的顯示，並可使畫面明亮。 亦可於亮度提昇膜與上述反射層等之間設有擴散板，受 免度提昇膜而反射之偏光狀態的光係於上述反射層等進 行，但所設置之擴散板係若使通過之光均一地擴散，同時 解決偏光狀態，成為非偏光狀態。亦即，擴散板係使偏光 返回原來之自然光狀態。此非偏光狀態，亦即自然光狀態 之光會朝向反射層等，藉由反射層等而反射，再通過擴散 板而再入射於焭度提昇膜，反覆此。如此，在亮度提昇膜 與上述反射層等之間，設有使偏光返回原來之自然光狀態 之擴散板，以維持顯示畫面之明亮度，同時並降低顯示書 面之顯示不均勻’可均一地提供明亮之畫面。藉由設有如 此之擴散板，初次之入射光係反射之重覆次數愈增加，與 擴散板之擴散功能相結合而可提供均一的明亮顯示畫面。 就前述之亮度提昇膜係可使用：例如介電體之多層薄膜 或折射率各向異性相異之薄膜的多層積層ft，透過特定偏 光軸之直線偏光而其他之光顯示進行反射之特性者；如使 膽固醇液晶聚合物之配向膜或其配向液晶層切於薄膜基 材上者，使左旋或右方走之任一者的圓㉟光反射而其他之光 99251-1000801.doc •21- 1354126 顯示透過之特性者等之適當者。 因此’使前述特定偏光轴之直線偏光穿透的型式之亮度 提昇膜’係使其穿透光直接集齊偏光轴而入射於廣視角偏 光板，俾可抑制廣視角偏光板產生的吸收損失且有效率地 穿透。另外，在如膽固醇液晶層投下圓偏光之型式的亮度 提昇膜，係亦可直接入射於偏光器，但就抑制吸收損失之 點，宜藉由相位差板，使其圓偏光直線偏光化而入射於廣 視角偏光板。又’藉由使用1/4波長板作為其相位差板，可 將圓偏光變換成直線偏光。 在可見光區域等之廣波長範圍發揮1/4波長板功能之相 位差板，係可藉由如下獲得’即相對於例如波長55〇 nmi 淡色光而發揮1/4波長板功能之相位差層與顯示其他之相 位差特性的相位差層、例如發揮1 /2波長板功能之相位差層 進行重疊的方式等。因此，配置於廣視角偏光板與亮度提 昇膜之間的相位差板，亦可為由丨層或2層以上之相位差層 所構成者。 又，即使有關膽固醇液晶層，藉由形成反射波長相異者 之組合而成為2層或3層以上重疊之配置構造，俾可得到於 可見光區域等之廣波長範圍反射圓偏光者。其結果，可得 到廣波長範圍之穿透圓偏光。 廣視角.偏光板係如上述之偏光分離型偏光板，亦可由使 廣視角偏光板與2層或3層以上之光學層積層所構成者。因 此，亦可為使上述反射型偏光板或半透過型偏光板與相位 差板組合之反射型橢圓偏光板或半透過型橢圓偏光板等。 99251-1000801.doc •22· 1354126 於廣視角偏光板疊層前述光學層之光學膜係可以在液曰 顯示裝置等之製造過程中依序個別積層之方式來形^晶 但，預先積層而形AA學膜者係具有〇。口質之安定性或組裝 作業等優而可提昇液晶顯示裝置等之生產性的優點。於疊 層係可使用黏著層等之適當的接著方法。當前述廣視角^ 光板或其他之光學膜接著時，其等之光學轴係可依作為目 的之相位差特性等而形成適當的配置角度。 “在前述之廣視角偏光板、或至少疊層1片廣視角偏光板之 光學膜係亦可設有用以與液晶胞等之其他構件接著的點著 層。形成黏著層之黏著劑前無特別限定。可適當選擇使用 以例如丙烯酸系聚合物1酮系聚合物、聚自旨、聚胺基甲 醋、聚酿胺、聚趟、氟系或橡膠等之聚合物作為基礎二人 物者。尤其’宜可使用如丙婦㈣黏著劑、光學透明性優口、 顯示適度之_性與凝錢與接純_著特性，而耐天 候性或耐熱性等優者。 上述外’從吸濕造成之發泡現象或剥離現象的防止、敛 膨脹差等造成之光學㈣降低或液晶胞之_防止，甚至 兩品質且耐久性優之液晶顯示裝置的形成性等而言，宜為 吸濕率低而耐熱性優之黏著層。 黏著層亦可含有添加劑。就該添加劑而言係可舉例如： :然物或合成物之樹脂類’尤其賦予黏著性的樹脂、或玻 璃纖維、玻_、金心、其他之無機粉末等所構成之填 充劑或顏枓、#色劑、防止氧化劑等。又，含有微粒子， 亦可於黏著層賦予光擴散性。 9925M000801.doc -23- ⑺ 4126 於：視角偏光板或光學膜之單面或雙面附設黏著層係可 以適當的方式進行彡例係可舉出：調製—於¥笨或醋酸乙 1之適當溶㈣單獨物或混合物所構成之溶劑中使基礎 =合物或其組合物溶解或分散之約1G〜4G重量％的黏著劑 :液’再以垂流方式或塗布方式等之適當展開方式直接附 此；廣視角偏光板上或光學膜上的方式。又可舉例依據 月〗述於分隔板上形成黏著層而再移接於廣視角偏光板上 或光學膜上的方式等。 黏著層係亦可設於廣視角偏光板或光學膜之單面或雙面 乍為不同組成或種類等者之重疊層。又，設於雙面時，於 廣視角偏光板或光學膜的表背亦可形成不同組成或種類或 厚度等之黏著層。黏著層之厚度係可依使用目的或接著力 等而適當地決定。一般係iyoo μηι，更宜為5〜2〇〇 pm ,尤 且為10〜1〇〇 pm。 對於黏著層之露出面，係至提供實用之間，以防止其污 染等為目的，分隔板被暫接著而覆蓋。藉此，在通例之處 理狀態可防止黏著層與異物等接觸。就分隔板而言係除上 述厚度的條件，可使用例如塑膠膜、橡膠片、紙、布、不 織布、網、發泡片或金屬箔、其等之疊層體等適當的薄片 體，依需要以矽酮系或長鏈烷基系'氟系或硫化鉬等之適 當剝離劑進行塗布處理者等依據習知之適當者。 又，在本發明中’在構成上述廣視角偏光板之偏光器、 透明性保護層或光學層等、黏著層等之各層係亦可為賦予 紫外線吸收能者等。紫外線吸收能之賦予係可使用如水楊 • 24- 99251.1〇〇〇8〇i.d〇c 1354126 酸醋系化合物或二苯甲酮系化合物、苯並三唑系化合物或 丙稀酸氰酯系化合物、鎳錯鹽系化合物等之紫外線吸收劑。 本發明之廣視角偏光板或光學膜係可適用於液晶顯示裝 置、或電致發光（EL)顯示裝置等的各種圖像顯示裝置》 例如’適用於穿透型液晶顯示裝置時，係該液晶顯示裝 置係於一對之穿透型偏光板（或光學膜）之間設有液晶胞所 構成°穿透型偏光板與液晶胞係可被以往公知之黏著劑等 接著°顯示面側之前偏光板與液晶胞之背面側的後偏光板 係可為同種’亦可為異種。又適用於反射型液晶顯示裝置 或半穿透型液晶顯示裝置時’係可使反射型偏光板或半穿 透型偏光板設於液晶胞之背面側而適用。又，液晶顯示裝 置製作之際，係可使例如擴散板、反炫光層、防止反射膜、 保護板、稜鏡陣列、透鏡陣列片、光擴散板、背光等之適 當零件配置於適當的位置1層或2層以上。 液晶顯示裝置之顯示模式係可適用於(Twisted Nemati0 模式、STN模式、VA (vertical Aiigned)模式、或 〇CB (〇响吻 Self-Compensated Birefringence)模式，但本發明之光學補償膜係 可特別適用於TN模式及STN模式。此等之顯示模式之中， 於OCB模式中’起因於黑顯示時之錢漏的對比度降低特 別明顯，但若為具備前述廣視角偏光板之液晶顯示裝置， 特別可發揮本發明之效果。 液晶顯示裝置之製作係可依以往公知之方法來進行。亦 即，液晶顯示裝置一般係藉由將液晶胞與廣視角偏Z板或 光學膜、及依需要之照明系統等的構成零件適當組裝而二 9925M000801.doc -25- I354126 入驅動電路等來製作。但，在本發明中係除使用本發明之 廣視角偏光板或光學膜之點外並無特別限定，可依據習知。 又’本發明之廣視角偏光板或光學膜係亦可適用於有機 顯示裝置。一般’有機el顯示裝置係於透明基板上依序 疊屠透明電極、有機發光層與金屬電極而形成發光體（有機 電致發光體）。此處，有機發光層為各種之有機薄膜疊層 體’已知有擁有例如由三苯基胺衍生物等所構成的電洞注 入層、由蒽等螢光性之有機固體所構成的發光層之疊層 體、或、由如此之發光層與芘衍生物等所構成的電子注入 層之疊層體、或此等之電洞注入層、發光層、及電子注入 層的疊層體等之組合的構成。 有機EL顯示裝置係藉由對透明電極與金屬電極施加電 壓，而對有機發光層注入電洞與電子，藉此等電洞與電子 之再結合所產生的能量會激發螢光物質，所激發之螢光物 質返回基底狀態時，使光進行輻射即以如此之原理進行發 光。所明中途之再結合的機構係與一般之二極體相同，從 此事亦可預想，電流與發光強度係相對於施加電壓而顯示 伴隨整流性之強非線形性。 在有機EL顯不裝置中，為取出有機發光層之發光，至少 者之電極必乂頁為透明，而一般使用以氧化姻錫（ιτ〇)等所 形成之透明電極作為陽極。另外，為使電子注入容易而提 高發光效率，於陰極使用工作函數小的物質乃很重要，通 常使用Mg-Ag、Al-Li等之金屬電極。 在如此構成之有機EL顯示裝置中，古地益止a於 ^丨衣置甲’有機發光層係以極薄 9925M00080i.doc •26· 1354126 至約厚10 nm的膜來形成》因此，有機發光層亦與透明電極 相同’使光大致完全地穿透。其結果，非發光時從透明基 板之表面入射，使透明電極與有機發光層穿透而以金屬電 極進行反射之光，因再朝透明基板的表面側出去，從外部 辨識時，可看到有機EL顯示裝置的顯示面如鏡面般。 藉電壓之施加而發光之有機發光層的表面側具備透明電 極’同時並於有機發光層之背面側具備金屬電極而成之含 有有機電致發光體的有機EL顯示裝置中，於透明電極之表 面側設有廣視角偏光板，同時並可於此等透明電極與廣視 角偏光板之間設有相位差板。 相位差板及廣視角偏光板係因具有從外部入射而以金屬 電極反射而來之光進行偏光的作用，故有所謂依其偏光作 用而從外部不使金屬電極之鏡面辨識的效果。尤其，若以 1/4波長板構成相位差板，且將廣視角偏光板與相位差板之 偏光方向構成的角度調整至π/4,可完全遮蔽金屬電極的鏡 面0 亦即，入射於此有機EL顯示裝置之外部光，係藉廣視角 偏光板僅直線偏光成分穿透。此直線偏光一般係藉相位差 板成為橢圓偏光。尤其’相位差板為1/4波長板，而且廣視 角偏光板與相位差板之偏光方向構成的角度為π/4時係成 為圓偏光。 此圓偏光係穿透透明基板、透明電極、有機薄膜、以金 屬電極進行反射，而再穿透有機薄膜、透明電極、透明基 板’而於相位差板再成為直線偏光。繼而，此直線偏光係 9925M000801.doc -27- 1354126 與廣視角偏光板之偏光方向正交’故無法穿透廣視角偏光 板。其結果，可完全遮蔽金屬電極之鏡面。 【實施方式】 (實施例1) 於二乙醯基纖維素膜（透明性保護層、厚8〇 之單面密 著附設有液晶聚合物之碟狀液晶層（複折射層）的光學補償 膜（富士寫真film公司製、製品名：WVA12B、層厚ι〇8μιη) 浸潰於6(TC之NaOH水溶液30秒而進行鹼化處理。其後，以 l〇〇°C加熱乾燥40秒。此時，使用自動複折射測定裝置 (KOBRA2 1ADH、王子計測機器社製）而測定的光學補償膜 之加熱前後的正面相位差值（And)係加熱前為317 nm、加熱 後為 23.3 nm。 另外’使厚75 μιη之聚乙烯醇膜於碘水溶液中進行延伸處 理後，乾燥而製作偏光器。 其次，使前述光學補償膜與偏光器以該光學補償膜之透 明性保護層側成為接著面的方式藉丙烯酸系接著劑進行接 著。貼合係製作光學補償膜後1分後進行。進一步，於偏光 器之其他面側，亦利用丙烯酸系接著劑而使厚8〇 μΓη的三乙 酿基纖維素薄膜（富士寫真film社製、製品名：TD80UF)所 構成之透明性保護層接著、乾燥。 藉此，得到本實施例1之廣視角偏光板。又，偏光器與透 明性保護層之接著係複折射層之遲相軸與偏光器之穿透軸 呈實質上平行的關係狀進行。 (實施例2) 99251-1000801.doc -28- 1354126 在本實施例2中，係於前述實施例1中以loot：進行之鹼化 處理後的加熱乾燥以701：進行以外，其餘係與前述實施例1 相同做法而製作實施例2之廣視角偏光板β (實施例3) 在本實施例3中，係於前述實施例1中以10(TC進行之鹼化 處理後的加熱乾燥以120°C進行以外，其餘係與前述實施例 1相同做法而製作實施例3之廣視角偏光板。 (比較例1) 在比較例1中’係於前述實施例1中以100。(：進行之驗化處 理後的加熱乾燥以65。(：進行以外，其餘係與前述實施例j 相同做法而製作比較例丨之廣視角偏光板。此時，與實施例 1相同做法而測定光學補償膜的加熱前後的正面相位差值 (△nd)後’加熱前為316nm，加熱後為3i.4nm。 (比較例2) 在比較例2中，係於前述比較例丨中以65t>c進行之鹼化處 理後的加熱乾燥以13(rc進行以外，其餘係與前述比較例1 相同做法而製作比較例2之廣視角偏光板。 (對比度） 對比度之評估係使在前述實施例或比較例中所製作之廣 視角偏光板配置於TFT型液晶胞（TN模式）的兩面側，分別測 定白色亮度及黑色亮度來進行。亮度之測定係使用亮度計 (商品名：BM-5A、TOPC〇N杜製）。從如此做法得到之亮度 的值’算出顯示晝面的正面方向之對比度（白色亮度/黑色亮 度）。其等之結果表示於表4。從同表明顯地，對於本實 99251-1000801.doc -29- 1354126 施例1〜3之廣視角偏光板係可得到良好的對比度。 (端面觀察） 端面觀察係將前述實施例或比較例中所製作之廣視角偏 光板穿孔成為A4大小，觀察端面。評估係於端面若無一處 破壞面則為〇，若有一處則為X。結果表示於表1。從同表 明顯地，在本實施例1~3之廣視角偏光板中未觀察到龜裂等 的破壞面。其一者，於比較例2之廣視角偏光板中係觀察到 龜裂所造成的破壞面。 [表1]It can also be wound up with a polarizer after one roll, and then warp, wet, and combined. The adhesive agent is not particularly limited, and specifically, for example, an acrylic acid 99251-100Q80l.doc 1354126 system, an anthrone type, a polyester type, a polyurethane type, a polyester type or a rubber type can be used. A suitable adhesive such as a transparent pressure-sensitive adhesive. Among these adhesives, in order to prevent the optical property change of the polarizer or the optical compensation film, when the adhesive is hardened or dried, it is preferably a process at a high temperature, or a hardening treatment for a long period of time or no need to dry. Further, it is also preferred that no adhesion such as peeling occurs under heating or humidifying conditions. From the above viewpoint, it is particularly preferable to use an acrylic pressure-sensitive adhesive. The acrylic pressure-sensitive adhesive is preferable to other adhesives, and is excellent in transparency, weather resistance, heat resistance, and the like. Such an acrylic acid pressure-sensitive adhesive is not particularly limited, and examples thereof include (meth)acrylic acid butyl vinegar, methyl (meth)acrylate, (mercapto)ethyl acrylate, and (fluorenyl)acrylic acid. The monomer is a component, and an acrylic polymer having a weight average molecular weight of 100,000 or more and a glass transition temperature of o°c or less is used as a base polymer. Further, when the refractive indices of the birefringent layer and the transparent protective layer are different from each other, the adhesive preferably exhibits an intermediate value of the refractive indices of the two from the viewpoint of the suppression of the reflection loss. The polarizer may be a polarizer that transmits light in a linearly polarized state, in particular, which is suitable for obtaining a light in a specific polarized state. The polarizer is not particularly limited, and examples thereof include a polyvinyl alcohol-based film, a partially condensed deuterated polyvinyl alcohol-based film, and a hydrophilic polymer film partially ionized with an ethylene/vinyl acetate copolymer system to adsorb iodine. And/or a dichroic dye extending, such as a dehydration treatment of polyethylene (IV), or a polyene alignment film of a polychlorinated dehydrochlorination treatment. Among these polarizers, a polarizer composed of a dichroic material such as a polyvinyl alcohol-based m or a dichroic dye which is adsorbed by ruthenium is preferable, and a polarizer of 9925I-100080I.doc 1354126 is particularly preferable. In order to obtain a linearly polarized light having a high degree of polarization, a polyvinyl alcohol-based film can be suitably used in any method such as a vertical flow method, a casting method, or an extrusion method in which a raw liquid dissolved in water or an organic solvent is formed into a film. Alcohol resin film former. The degree of polymerization of the polyvinyl alcohol-based resin is preferably from about 100 to 5,000, more preferably from 1,400 to 4,000. Further, the step of forming the hard coat layer or the process of preventing the reflection treatment, preventing the adhesion, or the purpose of non-diffusion and anti-glare may be carried out without bringing the surface of the polarizer of the transparent protective layer to the surface. The hard coat treatment is intended to suppress damage of the surface of the polarizing plate or the like. For example, a hardened film such as a hardness or a smoothing property of a suitable ultraviolet curable resin such as an acrylic acid or an anthrone may be formed, for example, in addition to the surface of the transparent protective layer. The X' anti-reflection treatment is intended to prevent reflection of light outside the surface of the polarizing plate, and can be achieved by conventionally preventing the formation of a reflective film or the like. The purpose of preventing (4) processing is to implement the suppression of the presence and absence of adjacent layers. The anti-glare treatment system aims to avoid the fact that the surface of the polarizing plate will be reversed and the identification of the light transmitted through the polarizing plate is hindered. For example, it is preferable to provide a fine concavo-convex structure on the surface of the transparent protective layer by a sandblasting method or a roughening method of a scribing method or a method of blending transparent fine particles, etc., in which the surface micro-concave (four) is formed. The microparticle system can be composed of, for example, an average particle diameter of G.5~2G (iv) oxygen chopping, oxidation, oxidation of tin, copper oxide, oxidation, oxidation, etc., by cross-linking or uncrosslinking. Transparent fine particles such as fine particles of a polymer. In the case of the structure, the amount of fine particles used is preferably from about 2 to 70 parts by weight, preferably from 5 to 5 parts by weight, per 100 parts by weight of the transparent resin forming the surface fine uneven structure. The anti-glare layer system may also have a diffusion layer (viewing angle expansion function, etc.) for diffusing the polarizing plate through the light to expand the viewing angle or the like. Further, the antireflection layer, the adhesion preventing layer, the diffusion layer, the antiglare layer, and the like may be provided separately from the transparent protective layer as a transparent protective layer, and may be formed into a different form from the transparent protective layer as an optical layer for other uses. In the above aspect, the wide viewing angle polarizing plate of the present invention can be used as the penetrating type. However, the present invention is not limited thereto, and it can be used as an optical film with other optical layer layers in accordance with the use or the like. The optical layer system is particularly limited, but an optical layer 1 used for a liquid crystal display device such as a reflective plate or a semi-transmissive plate or a phase difference plate (including a wavelength plate of 1/2 or 1/4 or the like) or 2 or more layers. More specifically, the wide viewing angle polarizing plate laminated reflecting plate or the semi-transmissive reflecting plate of the present invention can be used as a reflective polarizing plate or a semi-transmissive polarizing plate. Further, in the wide viewing angle polarizing plate laminated phase difference plate of the present invention, φ can also be used as an elliptically polarizing plate or a circularly polarizing plate. Further, a polarizing plate which is used as a brightness-increasing film of a wide viewing angle polarizing plate of the present invention can also be used. The reflective polarizing plate is a reflective liquid crystal display device which is provided with a reflective layer on a wide viewing angle polarizing plate and is applicable to reflection from incident light from the identification side (display side). The formation of the reflective polarizing plate can be carried out by a suitable method in which a transparent protective layer on the side opposite to the side of the complex sound layer is provided with a double anti-two layer made of metal or the like. More specifically, for example, a foil or a vapor-deposited film made of a reflective metal such as No. 9925M000801.doc 17 1354126 may be attached to one surface of a transparent protective layer such as a matte-treated protective film. In addition, the transparent protective layer contains a metal reflective layer in an appropriate manner such as a vapor deposition method or a plating method on the surface fine uneven structure of the radial particles. The reflective layer of the fine concavo-convex structure is such that the incident light is diffused and diffused to prevent reflection or scattering, and has the advantage of suppressing unevenness of light and dark. Further, the transparent protective layer containing fine particles also has the advantage of being diffused when the incident light and the reflected light penetrate therethrough to further suppress uneven brightness and the like. The reflection layer which reflects the fine concavo-convex structure of the fine concavo-convex structure of the transparent protective layer can be directly formed by a vapor deposition method such as a vacuum deposition method, an ion implantation method, a sputtering method, or the like, or a plating method. The method attached to the surface of the transparent protective layer is performed. Further, the reflective polarizing plate may be formed directly on the transparent protective layer of the wide viewing angle polarizing plate, and may be used as a reflective sheet in which a reflective layer is provided as a suitable film for the transparent protective layer. Further, since the reflecting layer is generally made of a metal, the use form in which the reflecting surface is covered with the transparent protective layer or the wide viewing angle polarizing plate or the like prevents the reflectance due to oxidation from being lowered. Further, the initial reflectance is continued for a long period of time, and the protective layer may be additionally laminated on the reflective layer. The semi-transmissive polarizing plate can be obtained by the above-described semi-transmissive reflective layer which is reflected by the reflective layer and which forms a semi-lens or the like which penetrates. The semi-transmissive polarizing plate is generally disposed on the back side of the liquid crystal cell. When a transflective liquid crystal display device having such a semi-transmissive polarizing plate is used in a bright environment, when light is incident from the identification side (display surface side) as display light, when used in a dark environment, Light from a backlight or the like is used as display light. Therefore, 99251-1000801.doc.jg. 1354126 can reduce the consumption of electricity. An elliptical polarizing plate or an elliptically polarizing plate in which a phase difference plate is further laminated on a wide viewing angle polarizing plate is described. When the linearly polarized light is changed to elliptically polarized light or circularly polarized light' or the elliptically polarized or circularly polarized light is changed to a linearly polarized light, or the polarized direction of the linearly polarized light is changed, a retardation plate or the like can be used. In particular, a so-called quarter-wave plate (also referred to as a λ/4 plate) can be used to change the linearly polarized light into a circularly polarized light or a phase difference plate in which the circularly polarized light is changed to a linearly polarized light. A 1/2 wavelength plate (also referred to as a λ/2 plate) is generally used to change the direction of polarization of linearly polarized light. The elliptically polarizing plate can be effectively used for the black-and-white display without the aforementioned coloring by the coloring (blue or yellow) generated by the birefringence compensation (prevention) of the liquid crystal layer of the liquid crystal display device of the STN (Super Twisted Nematic) mode. Situation, etc. Further, it is preferable to control the refractive index of the three-dimensional element to compensate (prevent) the coloring which occurs when the screen of the liquid crystal display device is seen from an oblique direction. The circularly polarizing plate can be effectively used for adjusting the color tone of an image of a reflective liquid crystal display device in which an image is a color display, and also has a function of preventing reflection. Specific examples of the phase difference plate described above may be exemplified by polycarbonate, polyvinyl alcohol, polystyrene, polymethyl methacrylate, polypropylene or other polyolefins, polyarylates, and polyamines. A birefringent film or a liquid crystal polymer alignment film obtained by stretching a film of a polymer, an alignment layer of a liquid crystal polymer, and the like. The phase difference plate may have an appropriate phase difference, and the phase difference may be used for the purpose of compensation such as coloring or viewing angle generated by birefringence of various wavelength plates or liquid crystal layers, or may be a stack. Two or more types of retardation plates are used to control optical characteristics such as phase difference. 99251-1000801.doc • 19-1354126 Further, the elliptically polarizing plate or the reflective elliptically polarizing plate is a combination of a wide viewing angle polarizing plate, a reflective polarizing plate, and a phase difference plate. Such an elliptically polarizing plate or the like may be a combination of a (reflective) polarizing plate and a phase difference plate. This method may be formed by sequentially laminating the manufacturing process of the liquid crystal display device, but forming an elliptically polarized light as described above. The optical film of a board or the like has an advantage of excellent quality stability or lamination workability, and can improve the manufacturing efficiency of a liquid crystal display device or the like. The polarizing plate which is bonded to the wide viewing angle polarizing plate and the brightness increasing film is usually used on the back side of the liquid crystal cell. The brightness enhancement film is formed by a natural light such as a backlight of a liquid crystal display device or a reflection from the back side, so that a linear polarization of a specific polarization axis or a circular polarization of a specific direction is reflected, and other light shows a characteristic of penetration, so that the brightness is made. The polarizing plate in which the film and the wide viewing angle polarizing plate are laminated is such that light from a light source such as a backlight is incident to obtain a transmitted light of a specific polarized state, and the light other than the specific polarized state is not penetrated and reflected. The light reflected by the brightness enhancement film surface is inverted by the reflection layer or the like provided on the rear side, and is incident on the brightness enhancement film to be partially or completely. The 卩 penetrates into the light of a specific polarization state and seeks to increase the amount of light that the brightness enhancement film penetrates, and supplies the polarized light that is hard to be absorbed by the polarizer, and the amount of light that can be used for liquid crystal image display or the like increases. Increase the brightness. In other words, when the light is incident from the back side of the liquid crystal cell through the polarizer without using the brightness enhancement film, the light having a polarization direction that is inconsistent with the polarization axis of the polarizer is absorbed by the polarizer. Does not penetrate the polarizer. That is, it depends on the characteristics of the polarizer used, but about 5% of the light is absorbed by the polarizer, and the amount of light that can be used for liquid crystal image display is reduced, 9925M000801.doc •20· Image darken. The brightness enhancement film is such that light having a polarization direction as absorbed by the polarizer is not incident on the polarizer, but is temporarily reflected by the brightness enhancement film, further reversed by a reflection layer provided on the rear side thereof, and then incident on the brightness. In the case where the lift film is reversed, the direction of polarization of the light that is reflected and inverted between the two is only supplied to the polarizer by the polarized light that can be transmitted through the brightness enhancement film in the polarization direction of the polarizer. Efficiently used for display of images of liquid crystal display devices, and can make the screen bright. A diffusing plate may be provided between the brightness increasing film and the reflective layer, and the light in a polarized state reflected by the lifting film may be applied to the reflecting layer or the like, but the diffusing plate provided may pass the light. Uniform diffusion, while solving the polarization state, becomes a non-polarized state. That is, the diffusing plate returns the polarized light to the original natural light state. In the non-polarized state, that is, the light in the natural light state is directed toward the reflective layer or the like, reflected by the reflective layer or the like, and then incident on the mobility enhancement film through the diffusion plate, and is repeated. In this manner, a diffusing plate that returns the polarized light to the original natural light state is provided between the brightness enhancement film and the reflective layer to maintain the brightness of the display screen and to reduce the display unevenness in the display. The picture. By providing such a diffusing plate, the number of repetitions of the initial incident light reflection is increased, and combined with the diffusing function of the diffusing plate, a uniform bright display image can be provided. For the above-mentioned brightness enhancement film system, for example, a multilayer film of a dielectric body or a multilayer laminate ft of a film having a refractive index anisotropy, a linearly polarized light transmitted through a specific polarization axis and other light showing a characteristic of reflection; For example, if the alignment film of the cholesteric liquid crystal polymer or the alignment liquid crystal layer thereof is cut on the film substrate, the circle 35 of either the left-handed or the right-handed light is reflected and the other light is 99251-1000801.doc •21- 1354126 Appropriate person who shows the characteristics passed through. Therefore, 'the type of brightness enhancement film that allows the linear polarization of the specific polarization axis to penetrate" is such that the transmitted light directly collects the polarization axis and is incident on the wide viewing angle polarizing plate, thereby suppressing the absorption loss generated by the wide viewing angle polarizing plate and Pass through efficiently. In addition, a type of brightness enhancement film which is circularly polarized, such as a cholesteric liquid crystal layer, may be directly incident on the polarizer, but the point of suppressing the absorption loss is preferably caused by linearly polarizing the circularly polarized light by the phase difference plate. Yu Guang viewing polarizer. Further, by using a quarter-wave plate as the phase difference plate, circularly polarized light can be converted into linearly polarized light. A phase difference plate that functions as a quarter-wave plate in a wide wavelength range such as a visible light region can obtain a phase difference layer that functions as a quarter-wave plate with respect to, for example, a light-wavelength of 55 〇 nmi at a wavelength of 55 μm. A phase difference layer that displays other phase difference characteristics, for example, a phase difference layer that functions as a 1 / 2 wavelength plate is superimposed. Therefore, the phase difference plate disposed between the wide viewing angle polarizing plate and the brightness increasing film may be composed of a germanium layer or a retardation layer of two or more layers. Further, even if the cholesteric liquid crystal layer is formed by a combination of two or more layers of overlapping reflection wavelengths, it is possible to obtain a circularly polarized light in a wide wavelength range such as a visible light region. As a result, penetrating circularly polarized light in a wide wavelength range can be obtained. The polarizing plate is a polarizing plate type polarizing plate as described above, and may be composed of a wide viewing angle polarizing plate and two or more optical layers. Therefore, a reflective elliptically polarizing plate or a semi-transmissive elliptically polarizing plate in which the reflective polarizing plate or the semi-transmissive polarizing plate and the retardation plate are combined may be used. 99251-1000801.doc •22· 1354126 The optical film system in which the optical layer is laminated on the wide viewing angle polarizing plate can be formed by sequentially laminating in the manufacturing process of a liquid helium display device, etc. The AA film learner has cockroaches. The stability of the oral cavity or the assembly work is excellent, and the productivity of the liquid crystal display device and the like can be improved. A suitable bonding method such as an adhesive layer can be used for the laminate system. When the above-mentioned wide viewing angle or other optical film is followed, the optical axis of the same can be formed into an appropriate arrangement angle depending on the phase difference characteristic or the like. "The above-mentioned wide viewing angle polarizing plate or an optical film system in which at least one wide viewing angle polarizing plate is laminated may be provided with a dot layer for subsequent bonding with other members such as liquid crystal cells. There is no special adhesive before the adhesive layer is formed. For example, a polymer such as an acrylic polymer 1 ketone polymer, a polymethyl methacrylate, a polyamine, a polyfluorene, a fluorine, or a rubber may be appropriately selected and used as a base. 'Appropriate use such as B-Wo (4) Adhesive, optical transparency, excellent mouth, showing moderate _ sex and money and pure _ characteristics, and weather resistance or heat resistance, etc. The foaming phenomenon, the prevention of the peeling phenomenon, the difference in the convergence and the like, the optical (4) reduction, or the prevention of the liquid crystal cell, or even the formation of the liquid crystal display device of two qualities and excellent durability, etc., preferably the moisture absorption rate is low. The adhesive layer may also contain an additive. The adhesive layer may also contain an additive. For the additive, for example, a resin of a material or a composition, especially an adhesive resin, or a glass fiber, a glass, or a gold Heart, other inorganic The filler or enamel, #色剂, oxidizing agent, etc., which are composed of the last layer, and microparticles, can also impart light diffusibility to the adhesive layer. 9925M000801.doc -23- (7) 4126 In: viewing angle polarizing plate or optical film The adhesive layer on one or both sides can be carried out in an appropriate manner. For example, the preparation may be carried out in a solvent consisting of a suitable solution or a mixture of acetic acid or a mixture of acetic acid. The adhesive which dissolves or disperses about 1G to 4G% by weight of the composition: the liquid 'is directly attached to the appropriate expansion manner by a vertical flow method or a coating method; the wide viewing angle polarizing plate or the optical film. For example, according to the description of the month, the adhesive layer is formed on the partition plate and then transferred to the wide viewing angle polarizing plate or the optical film. The adhesive layer can also be disposed on the single-sided or double-view of the wide viewing angle polarizing plate or the optical film. The surface layer is an overlapping layer of different compositions or types, and when disposed on both sides, an adhesive layer of different composition, type or thickness may be formed on the front and back of the wide viewing angle polarizing plate or the optical film. Can be used according to the purpose of use Then, the force is determined appropriately, etc. Generally, it is iyoo μηι, more preferably 5~2〇〇pm, especially 10~1〇〇pm. For the exposed surface of the adhesive layer, it is provided to provide practicality to prevent it. For the purpose of contamination, etc., the partition plate is temporarily covered and covered, whereby the adhesive layer can be prevented from coming into contact with foreign matter or the like in the general state of the treatment. In the case of the separator, for example, a plastic film can be used. A suitable sheet such as a rubber sheet, paper, cloth, non-woven fabric, net, foamed sheet, metal foil, or the like, or the like, an anthrone or a long-chain alkyl-based fluorine or molybdenum sulfide, etc. In the present invention, the layer of the polarizer, the transparent protective layer, the optical layer, or the like, and the adhesive layer which constitute the wide viewing angle polarizing plate may be used. Give ultraviolet absorbers, etc. For the ultraviolet absorbing energy, for example, salicyl • 24-99251.1〇〇〇8〇id〇c 1354126 vinegar-based compound or benzophenone-based compound, benzotriazole-based compound or cyanoacrylate-based compound can be used. A UV absorber such as a nickel-miss salt compound. The wide viewing angle polarizing plate or optical film of the present invention can be applied to various image display devices such as liquid crystal display devices or electroluminescence (EL) display devices. For example, when applied to a transmissive liquid crystal display device, the liquid crystal is used. The display device is formed by providing a liquid crystal cell between a pair of penetrating polarizing plates (or optical films). The penetrating polarizing plate and the liquid crystal cell can be polarized by a conventionally known adhesive, etc. The rear polarizing plate on the back side of the plate and the liquid crystal cell may be of the same kind or may be heterogeneous. Further, when it is applied to a reflective liquid crystal display device or a transflective liquid crystal display device, a reflective polarizing plate or a semi-transmissive polarizing plate can be applied to the back side of the liquid crystal cell. Further, when the liquid crystal display device is manufactured, appropriate components such as a diffusion plate, an anti-glare layer, an antireflection film, a protective plate, a ruthenium array, a lens array sheet, a light diffusion plate, and a backlight can be disposed at appropriate positions. 1 or more layers. The display mode of the liquid crystal display device can be applied to (Twisted Nemati0 mode, STN mode, VA (vertical Aiigned) mode, or 〇CB (Self-Compensated Birefringence) mode, but the optical compensation film of the present invention can be particularly applied. In the TN mode and the STN mode, among the display modes, the contrast reduction of the money leakage caused by the black display is particularly remarkable in the OCB mode, but in the case of the liquid crystal display device having the wide viewing angle polarizing plate described above, The effect of the present invention is achieved. The production of the liquid crystal display device can be carried out according to a conventionally known method. That is, the liquid crystal display device is generally obtained by polarizing the liquid crystal cell and the wide viewing angle to the Z plate or the optical film, and the illumination system as needed. The components are assembled as appropriate, and two 9925M000801.doc -25-I354126 are incorporated into a driver circuit, etc. However, in the present invention, there is no particular limitation other than the point of using the wide viewing angle polarizing plate or the optical film of the present invention. According to the prior art, the wide viewing angle polarizing plate or optical film system of the present invention can also be applied to an organic display device. Generally, the organic organic display device is transparent. The transparent electrode, the organic light-emitting layer and the metal electrode are sequentially stacked on the substrate to form an illuminant (organic electroluminescent body). Here, the organic light-emitting layer is a composite of various organic thin films, which are known to have, for example, triphenyl. a hole injection layer formed of a base amine derivative or the like, a laminate of a light-emitting layer composed of a fluorescent organic solid such as ruthenium, or an electron injection layer composed of such a light-emitting layer and an anthracene derivative A laminate of the laminate, the hole injection layer, the light-emitting layer, and the laminate of the electron injection layer, etc. The organic EL display device applies a voltage to the transparent electrode and the metal electrode, and is organic. The light-emitting layer injects holes and electrons, whereby the energy generated by the recombination of the holes and the electrons excites the fluorescent substance, and when the excited fluorescent substance returns to the substrate state, the light is irradiated, and the light is emitted by such a principle. The mechanism to be recombined in the middle is the same as that of the general diode, and it is also conceivable that the current and the luminous intensity show a strong nonlinearity accompanying the rectifying property with respect to the applied voltage. In the organic EL display device, in order to extract the light emission of the organic light-emitting layer, at least the electrode must be transparent, and a transparent electrode formed by oxidizing a tin or the like is generally used as an anode. Electron injection is easy and the luminous efficiency is improved. It is important to use a substance having a small work function at the cathode, and a metal electrode such as Mg-Ag or Al-Li is usually used. In the organic EL display device thus constituted, ^The armored 'organic light-emitting layer is formed with a film of extremely thin 9925M00080i.doc •26·1354126 to about 10 nm thick. Therefore, the organic light-emitting layer is also the same as the transparent electrode', so that light is substantially completely penetrated. As a result, when the light is not emitted, the light is incident from the surface of the transparent substrate, and the light that is reflected by the transparent electrode and the organic light-emitting layer and reflected by the metal electrode is removed from the surface side of the transparent substrate, and the organic light can be seen from the outside. The display surface of the EL display device is mirror-like. An organic EL display device including an organic electroluminescence device having a transparent electrode on the surface side of the organic light-emitting layer and having a metal electrode on the back side of the organic light-emitting layer is applied to the surface of the transparent electrode. A wide viewing angle polarizing plate is disposed on the side, and a phase difference plate is disposed between the transparent electrode and the wide viewing angle polarizing plate. Since the phase difference plate and the wide viewing angle polarizing plate have a function of polarizing light reflected from the outside and reflected by the metal electrode, there is an effect that the mirror surface of the metal electrode is not recognized from the outside by the polarizing action. In particular, when the retardation plate is formed by a quarter-wavelength plate and the angle formed by the polarization directions of the wide-view polarizing plate and the phase difference plate is adjusted to π/4, the mirror surface 0 of the metal electrode can be completely shielded, that is, incident thereon. The external light of the organic EL display device is penetrated by a linear polarizing plate by a wide viewing angle polarizing plate. This linear polarized light is generally elliptically polarized by a phase difference plate. In particular, the retardation plate is a quarter-wave plate, and the angle between the wide-angle polarizer and the polarization direction of the phase-difference plate is π/4, which is circularly polarized. This circular polarized light penetrates the transparent substrate, the transparent electrode, the organic thin film, and is reflected by the metal electrode, and penetrates the organic thin film, the transparent electrode, and the transparent substrate ′, and becomes linearly polarized on the phase difference plate. Then, the linear polarizing system 9925M000801.doc -27-1354126 is orthogonal to the polarization direction of the wide viewing angle polarizing plate, so that the wide viewing angle polarizing plate cannot be penetrated. As a result, the mirror surface of the metal electrode can be completely shielded. [Embodiment] (Example 1) An optical compensation film in which a liquid crystal polymer-containing disk-shaped liquid crystal layer (polyrefining layer) is adhered to a polyethylene siloxane film (transparent protective layer and a single layer of 8 Å thick) (Fuji Photo Film Co., Ltd. product name: WVA12B, layer thickness ι〇8μιη) was immersed in 6 (TC NaOH aqueous solution for 30 seconds to carry out alkalization treatment. Thereafter, it was dried by heating at 40 ° C for 40 seconds. In the case of the optical compensation film measured by the automatic birefringence measuring apparatus (KOBRA2 1ADH, manufactured by Oji Scientific Instruments Co., Ltd.), the frontal phase difference (And) before heating is 317 nm before heating and 23.3 nm after heating. The polyvinyl alcohol film having a thickness of 75 μm is subjected to a stretching treatment in an aqueous iodine solution, and then dried to prepare a polarizer. Next, the optical compensation film and the polarizer are formed such that the side of the transparent protective layer of the optical compensation film is a bonding surface. This was carried out by an acrylic adhesive. The bonding was performed one minute after the optical compensation film was formed. Further, on the other surface side of the polarizer, a tri-branched cellulose having a thickness of 8 μm was also used. The transparent protective layer composed of a film (manufactured by Fuji Photo Film Co., Ltd., product name: TD80UF) was dried and dried. Thereby, the wide viewing angle polarizing plate of the first embodiment was obtained. Further, the polarizer and the transparent protective layer were attached. The retardation axis of the birefringent layer is in a substantially parallel relationship with the transmission axis of the polarizer. (Embodiment 2) 99251-1000801.doc -28- 1354126 In the second embodiment, the first embodiment is The wide viewing angle polarizing plate β of Example 2 was produced in the same manner as in the above Example 1 except that the heating and drying after the alkalization treatment was carried out at 701: (Example 3). The wide viewing angle polarizing plate of Example 3 was produced in the same manner as in the above Example 1 except that the heating and drying after the alkalization treatment by TC was carried out at 120 ° C in the above Example 1. Example 1) In Comparative Example 1, 'there was 100 in the above-mentioned Example 1. (: The heat drying after the chemical treatment was carried out at 65. (:: the other methods were compared with the above-described Example j. Example of a wide viewing angle polarizer. At this time, and implementation In the same manner, the front surface retardation (Δnd) before and after heating of the optical compensation film was measured, and it was 316 nm before heating and 3 i.4 nm after heating. (Comparative Example 2) In Comparative Example 2, the comparative example was used. The wide viewing angle polarizing plate of Comparative Example 2 was produced in the same manner as in the above Comparative Example 1 except that the heat treatment after the alkalization treatment was carried out at 65t>c was carried out at 13 (rc). (Contrast) Evaluation of contrast was made. The wide viewing angle polarizing plate produced in the above-described embodiment or the comparative example was placed on both sides of the TFT type liquid crystal cell (TN mode), and white brightness and black brightness were measured. The brightness was measured using a luminance meter (trade name: BM-5A, TOPC〇N Duo). From the value of the brightness obtained in this way, the contrast (white brightness/black brightness) indicating the front direction of the face is calculated. The results of these are shown in Table 4. From the same table, it is apparent that a good viewing angle can be obtained for the wide viewing angle polarizing plate of the present embodiment 99251-1000801.doc -29- 1354126. (End surface observation) The end surface observation was obtained by perforating the wide viewing angle polarizing plate produced in the above-mentioned Example or Comparative Example to A4 size, and observing the end surface. The evaluation system is 〇 if there is no one on the end face, and X if there is one. The results are shown in Table 1. As apparent from the same table, no fracture surface such as cracks was observed in the wide viewing angle polarizing plates of the first to third embodiments. In one of the wide viewing angle polarizing plates of Comparative Example 2, the fracture surface caused by the crack was observed. [Table 1]
熱處理溫度(°C) 對比度 龜裂之有無 實施例1 100 453 〇 實施例2 70 438 〇 實施例3 120 432 〇 比較例1 65 412 〇 比較例2 130 432 X 99251-1000801.doc 30-Heat treatment temperature (°C) Contrast Crack presence or absence Example 1 100 453 实施 Example 2 70 438 实施 Example 3 120 432 〇 Comparative Example 1 65 412 〇 Comparative Example 2 130 432 X 99251-1000801.doc 30-