TW201128268A

TW201128268A - A liquid crystal display device and a set of optical materials for use in a liquid crystal display device

Info

Publication number: TW201128268A
Application number: TW99135482A
Authority: TW
Inventors: Yoshimi Kagari; Ya-Li Li
Original assignee: Sumitomo Chemical Co
Priority date: 2009-10-20
Filing date: 2010-10-18
Publication date: 2011-08-16
Also published as: WO2011049188A1; KR20120086706A; TWI529458B; CN102597861A; KR101630902B1; JP5568808B2; CN102597861B; JP2011090042A

Abstract

The present invention provides a liquid crystal display device comprising a backlight and a liquid crystal panel arranged on the backlight, wherein the liquid crystal panel includes a liquid crystal cell and polarizing plates laminated on both sides of the liquid crystal cell, in the polarizing plates, the incident light side polarizing plate arranged at the backlight side of the liquid crystal cell has a polarizing film composed of polyvinyl alcohol based resin and a light source side protective film having optical anisotropy and laminated on the backlight side of the polarizing film, the backlight includes a direct radiation type or a sidelight type area light source and an optical sheet material having optical anisotropy and arranged at the nearest position to the liquid crystal panel, and the light source side protective film and the optical sheet material are so arranged as to have an angle formed by slow axis of the light source side protective film and slow axis of the optical sheet material of 60 degree or less. Less color unevenness occurs in the liquid crystal display device and the liquid display device is excellent in visibility, can realize growing slimmer, and is also excellent in cost performance.

Description

201128268 六、發明說明：【發明所屬之技術領域】本發明係關於一種具備背光源之液晶顯示裝置及液晶顯示裝置用之光學構件組。【先前技術】近年來，消耗電力較低、以低電壓運作、輕量且薄型之液晶顯示裝置正作為行動電話、個人數位助理、電腦用之螢幕、及電視等之資訊用顯示裝置迅速普及。進而，隨著液晶技術之發展，已提出各種模式之液晶顯示裝置，先前視為液晶顯示裝置之問題的響應速度、對比度及視角等正得到解決。另一方面’基於市場強烈要求液晶顯示裝置之進一步薄型輕量化，構成液晶顯示裝置之液晶面板、擴散板、背光單元、以及驅動ic等正向薄型化或小型化方向發展。於此種狀況下’要求作為液晶面板之構成構件的偏光板亦以J 〇 μιη為單位進行薄型化。同時’ 著液晶顯示裝置之普及，市場對降低成本之要求亦日益強烈’對於偏光板亦需要進一步降低成本或提高生產性。為滿足該等要求’迄今為止已提出各種方案。例如，偏光板通常具有於偏光膜之一面或兩面設置有透明保護膜之構成’且該透明保護膜一般使用三乙醯纖維素，但如JP Η08-43812-Α般’廣泛嘗試藉由使該保護膜具有相位差來對其賦予光學補償功能，而謀求削減構成構件，簡化生產 151581.doc 201128268 步驟。藉由形成此種構成’可使作為偏光板與相位差板之積層物之複合偏光板薄型輕量化，進而削減液晶顯示裝置之構成構件數，藉此可簡化生產步驟，提高良率而降低成進而’業界亦積極嘗試將保護膜之材料換為三乙醯纖維素以外之其他樹脂。例如，於JPH〇7 776〇8一中揭示有使用環狀稀烴系樹脂代替三乙醯纖維素之方法。铁而，環狀稀煙系樹脂一般價格昂貴，因此目前用於附加價值更高之相位差^純用作保護膜，則有於削減成本方面無法取得平衡的問題。作為可滿足上述要求之技術，例如提出有將聚對苯二曱酸乙二酯膜作為保護膜之方法。聚對苯二甲酸乙二醋因機械強度優異，故適合薄膜化，可實現偏光板之薄型化。進而’與三乙醯纖維素或環狀稀烴樹脂相&，-般於成本方面亦具有優勢。&此以外，與三乙醯纖維素相比，具有低透濕性且低吸水性之特徵，因此耐濕熱性或耐冷熱衝擊性亦優異，對於環境變化亦可期待具有較高之对久性。然而，另一方面，適合於保護膜之延伸 ……，--f H5L Ο 一酯膜一般光學異向性較大’且表現出較高之延遲。於將採用此種具有光學異向性之膜作為保護膜之偏光板搭載在液曰曰顯不裝置上之情形時，與將三乙醯纖維素臈用作保護膜之&偏光板相比，存在自斜向之色彩不均（亦稱為干涉不均、虹色不均）較顯著，視覺辨識性欠佳之問題。關於該問題，例如於JP2__1〇9993_a中，揭示有將以聚對 151581.doc 201128268 j 苯二f酸乙二酯膜作為保護膜之偏光板、與賦予霧值經控制之防眩層的偏光板組合而構成液晶顯示裝置，藉此減少色彩不均之方法。然而，該方法亦無法充分減低色彩不均，並且因對保護膜自身之物性值產生限制而導致在生產上產生制約，因此業界期待確立更加簡便、有效之方法。因此，本發明之目的在於提供一種液晶顯示裝置其包含背光源及配置於背光源上之液晶面板，於搭載有將具有光學異向性之膜作為光源側保護膜之光入射側偏光板之情形時，色彩不均亦較少，視覺辨識性亦優異，且實現薄型化’成本績效亦優異。本舍月之另-目的在於提供—種適合於上述液晶顯示裝置之光學構件組。本發明者等人為解決上述色彩不均之問題進行了努力研九、，口果發現，當於具備背光源及配置於背光源上之液晶板之液曰曰顯不裝置中，搭載將具有光學異向性之膜作為光源側保護膜之偏光板作為光入射側偏光板時，藉由使具有光學異向性之光源側保護膜之遲相轴與具有上述光學異向性之光學片構件之遲相軸所成角度（軸偏差角度）成為60。、下可有效地減少液晶顯示裝置之色彩不均。藉由使用 4 =法’可不增加新構件而以簡便方法實現高視覺辨識性 ”薄至化低成本化之並存。再者，於本發明中，具有光學異向性之光源側保護膜之遲相軸與具有上述光學異向性之光學片構件之遲相軸所成角度（轴偏差角度）係指較小一方之角度，即90。以下之角度。 151581.doc 201128268 【發明内容】即’本發明包含如下内容。 π]—種液晶顯示裝置，其係包括背光源及配置於該背光源上之液晶面板者，該液晶面板包含液晶單元與貼合於該液晶單元之兩面之 • 偏光板，上述偏光板之中，配置於液晶單元之背光源側之光入射側偏光板具有包含聚乙烯醇系樹脂之偏光膜、以及積層於該偏光膜之背光源側之具有光學異向性的光源側保護膜，上述背光源包含直下型或側光型之面光源、以及配置於最靠近上述液晶面板之位置之具有光學異向性的光學片構件，且以使上述光源側保護膜之遲相軸與上述光學片構件之遲相軸所成角度成為60度以下之方式配置上述光源側保護膜與上述光學片構件。、其中上述光源側保護膜之面内。於此情形時，可獲得本發明之 [2] 如[1 ]之液晶顯示裝置之相位差值為200 nm以上顯著效果。 [3] 如[1]或[2]之液晶顯示裝置，其中上述光源側保護膜為延伸聚對苯二曱酸乙二酯膜。該態樣較佳。 [4] 如[1]至[3]中任一項之液晶顯示裝置，#中上述光學片構件係選自由擴散膜、微透鏡膜及透鏡片所組成之群。該態樣較佳。 [5] 如[1]至[4]中任—項之液晶顯示裝置，其中將面内之遲 15158】,doc 201128268 相轴方向之折射率設為〜，將面内與遲相軸正交之方向之折射率設為ny，將厚度方向之折射率設為〜時上述光源側保護膜之以（nx-nz：)/fn n、主_ Λ χτ , dlnx-ny)表不之Νζ係數為4以上、或者未達2。該態樣較佳。 [6] 如[1]至[5]中任一項之液晶顧+驻gg 、<-饮曰日顯不裝置，其中上述光學片構件之面内之相位差信兔丨λλλ 、，，仰仪左m马丨000 nm以上。該態樣較佳。 [7] 一種光學構件組，苴俜用於且供一你用於具備液晶单兀及背光源之液晶顯示裝置者，其包含用於配置於上述液晶單元之上述背光源側的光入射側偏光板；以及用於配置於上述背光源之最靠近上具有光學異向性之光學片構件；述液晶單元之位置的乙烯醇系樹脂之偏光上述光入射側偏光板具有包含聚膜以及積層於上述偏光膜之一面之具有光學異向性之光源側保護膜’當用於液晶顯示裝置時，該光入射側偏光板係以使該光源側保護膜成為上述背光源側之方式配置，且以使上述光源側保護膜之遲相軸與上述光學片構件之遲相軸所成角度成為60。以下之方式配置上述光源側保護膜與上述光學片構件。 [8]如[7]之光學構件組，其中上述光源側保護膜之面内之相位差值為200 nm以上。於該態樣之情形時，可獲得本發明之顯著效果。 [9]如[7]或[8]之光學構件組，其巾上述光源㈣護膜為延伸聚對苯二曱酸乙二酯膜。該態樣較佳。 151581.doc 201128268 [10] 如[7]至[9]中任一項之光學構件組，其中上述光學片構件係選自由擴散膜、微透鏡膜及透鏡片所組成之群。該態樣較佳。 [11] 如[7]至[10]中任一項之光學構件組，其中將面内之遲相軸方向之折射率設為〜，將面内與遲相軸正交之方向之折射率設為ny，將厚度方向之折射率設為&時，上述光源側保護膜之以（nx-nz)/(nx-ny)表示之Nz係數為4以上、或者未達2。該態樣較佳。 [12] 如[7]至[i1]f任一項之光學構件組，其中上述光學片構件之面内之相位差值為1〇〇〇 nm以上。該態樣較佳。根據本發明，藉由使配置於背光源之液晶面板側之最表面的光學片構件之遲相軸相對於光入射側偏光板之光源側保護膜之遲相軸的偏差角度成為6〇。以下，可提供顯示時之色彩不均較少且視覺辨識性優異之液晶顯示裝置。又，根據本發明，亦可提供適合於上述液晶顯示裝置之光學構件組。【實施方式】 <液晶顯示裝置> 圖1係表示本發明之液晶顯示裝置之層構成之一例的剖面示意圖，其表示具備直下型或側光型之背光源之透射型液晶顯示裝置。本發明之圖1所不之液晶顯示裝置係由背光源2〇及配置於背光源20上之液晶面板80構成。液晶面板80包含液晶單元50、於液晶單元5〇之一面經由 151581.doc 201128268 . 黏著劑層34而積層之光入射側偏光板3〇、以及於液晶單元 5〇之另-面經由黏著劑層44而積層之光出射側偏光板4〇。液晶面板8〇通常藉由如下方法製作，即於偏光板30、40之 -面分別形成黏著劑層34、44，而形成附帶黏著劑層之光入射側偏光板60及附帶黏著劑層之光出射側偏光板7〇，並將該等偏光板以其黏著劑層側貼合在液晶單元5〇上。光入射側偏光板30係於偏光膜31之—面（成為背光源側之面）配置光源側保護膜32,於另一面（液晶單元側）配置「單元側保護膜或光學補償膜」33而成者。黏著劑層⑽ 積層於光入射側偏光板30之單元側保護膜或光學補償膜” 側之表面。如圖1所示之光入射側偏光板3 〇之構成就偏光板之薄型輕量化的觀點而言有利，又，可減少液晶顯示裝置之構成構件數，因此帶來生產步驟之簡單化及良率之提高。光出射側偏光板40係於偏光膜41之一面（與液晶單元相反側之面）配置保護膜42，於另一面（液晶單元側）配置「單元側保5蔓膜或光學補償膜」43而成者。黏著劑層44係積層於光出射側偏光板40之單元側保護膜或光學補償膜43側之表面。又，於圖1所示之例中，背光源20具備：面光源1〇、配置於面光源10之背面側（與液晶面板80相反側）之反射板 11、以及配置於面光源10與液晶面板8〇之間之光學片構件 12(例如擴散膜或微透鏡片等）。本發明之液晶顯示裝置係如下者，例如於具有圖1所示 151581.doc •10- 201128268 之層構成之液晶顯示裝置中，以使光入射側偏光板30中配置於偏光膜3 1之背光源20側之具有光學異向性的光源側保遵膜32之遲相軸、與背光源2〇中配置於最靠近液晶面板之位置之具有光學異向性的光學片構件12之遲相轴所成角度 (軸偏差角度）成為60。以下之方式，配置光源側保護膜32與光學片構件12者。該軸偏差角度較佳為45。以下。於軸偏差角度為0。之情形時’防止色彩不均之效果變得最高，但於貫際製造中，容許無損防止色彩不均效果之範圍之軸偏差角度。又’構成上述液晶顯示裝置之上述光入射側偏光板及上述光學片構件分別為長方形，就一般液晶顯示裝置之生產而& ’較佳為將上述光入射側偏光板的光源側保護膜之遲相軸相對於長方形之長邊的偏差角度及上述光學片構件之遲相軸相對於長方形之長邊的偏差角度分別設為45。以内’或者將上述光入射側偏光板的光源側保護膜之遲相軸相對於長方形之短邊的偏差角度及上述光學片構件之遲相轴相對於長方形之短邊的偏差角度分別設為45。以内。當然，於上述情形時，亦可以光學片構件之遲相軸相對於光入射側偏光板之光源側保護膜之遲相軸成為6〇。以下之方式進行配置。以下’對本發明之液晶顯示裝置進行更詳細說明。 <光入射側偏光板> 本發明中所使用之光入射側偏光板具備包含聚乙烯醇系樹脂之偏光膜、以及配置於該偏光膜之一面（液晶顯示裝 151581.doc 201128268 置中之成為背光源側之面）上的具有光學異向性之光源側保護膜。又，本發明中所使用之光入射側偏光板亦可具備配置於偏光膜之液晶單元側（與配置有上述光源側保護膜之面相反側之面）之單元側保護膜或光學補償膜。其中，於本發明中，較佳為僅於偏光膜之一面（背光源側）貼合光源側保護膜，於偏光膜之另一面直接貼合光學補償膜的形態。其原因在於：就偏光板之薄型輕量化之觀點而言有利，又，可減少液晶顯示裝置之構成構件數，因此帶來生產步驟之簡單化及良率之提高。又’亦可採用於偏光膜之兩面貼合保護膜（光源側保護膜及液晶單元側保護膜）’進而於液晶單元側保護膜上積層有光學補償膜的構成。此時，積層於偏光膜之液晶單元側（光學補償膜側）之液晶單元側保護膜一般採用光學異向性較小之膜。 (偏光膜）本發明中所使用之偏光膜例如可經如下步驟製造：藉由公知方法將聚乙烯醇系樹脂膜單軸延伸之步驟；利用二色性色素對聚乙烯醇系樹脂膜進行染色，藉此吸附二色性色素之步驟；利用硼酸水溶液對吸附有二色性色素之聚乙烯醇系樹脂膜進行處理之步驟；以及於利用硼酸水溶液之處理後進行水洗之步驟。作為聚乙烯醇系樹脂，可使用將聚乙酸乙烯酯系樹脂皂化而成者。作為聚乙酸乙烯酯系樹脂，除作為乙酸乙稀酯 151581.doc -12· 201128268 之均聚物之聚乙酸乙稀酿以外’可列舉乙酸乙豨醋與可與其共聚合之其他單體的共聚物等。作為可與乙酸乙稀醋共聚之其他單體’例如可列舉：不飽和羧酸類'烯烴類、乙稀基㈣、不飽和料類、以及具有㈣之丙烯醯胺類等。聚乙烯醇系樹脂之皂化度通常為85〜l00爪“。/。左右較佳為98 mol%以上。該聚乙稀醇系樹脂亦可經改性，例如亦可使用經酸類改性之聚乙稀甲酸及聚乙烯縮酸等。又，聚乙烯醇系、樹脂之聚合度通常，刚〜1G，_左右，較佳為 1，500~5,000左右。由此種聚乙烯醇系樹脂製成之膜可用作偏光膜之素材膜。將聚乙浠醇系樹脂製成膜之方法並無特別限定’可藉由公知方法製膜。聚乙烯料素材膜之膜厚並無特別^ 制’例如為10 μπι〜150 μηι左右。聚乙烯醇系樹脂膜之單軸延伸可於二色性色素之染色前進行、或者與染色同時進行、或者㈣色之後進行。當於染色之後進行單軸延伸時，該單軸延伸亦可於顺處:之前進行、或者於硼酸處理過程中進行。又，亦可於該等複數個階段中進行單軸延伸。複於單軸延伸時，可於圓周速度不同之輥間進行單軸延伸，亦可使用熱輥進行單軸延伸。又，單軸延伸可為於大氣中進行延伸之乾式延伸，亦可為於使用溶劑使聚乙稀醇系樹脂膜膨敎狀態下進行延伸之濕式延伸。延伸倍率通常為3〜8倍左右。 151581.doc 13 201128268 作為利用二色性色素對聚乙烯 _ 法，例如採用將聚乙稀醇系樹脂二含之方之水溶液中之古土 ^ ^ 、3有一色性色素碘或二色性毕料. /、體而$ ’可使用辭么較佳為於染色處理之前對聚乙檢酵系樹脂膜實施浸潰於水中之處理。於使用埃作為二色性色+卜醇李通常採用將聚乙烯 -糸樹月日L含有料Μ鉀之水溶液巾進行方法。該水溶液中之破之含量通 ,、為 0.0W 重，H 量份，右。又，碘化鉀之含量通常相對於水 100重量份，為〇 5〜2〇重量份左右。、溫度通常為2。〜4(TC左右。 “、之水溶液之又，於該水溶液中之浸潰時間（染色時間 20〜1，800秒左右。㊉马另一方面’於使用^色性染料作為二色性色素之情形時通常採用將聚乙烯醇系樹脂膜浸潰於含有水溶性二色性染料之水溶液中進行染色之方法。該水溶液中之二色性染料之含量通常相對於水1〇〇重量份，為1χ1〇·4〜ι〇重量份左右，較佳為Ixio-Li重量份左右。該水溶液亦可含有= 酸鈉等無機鹽作為染色助劑。用於染色之二色性染料水溶液之溫度通常為20〜80°C左右。又，於該水溶液中之浸潰時間（染色時間）通常為10〜1，800秒左右。利用二色性色素之染色後之硼酸處理通常可藉由將經染色之聚乙烯醇系樹脂膜浸潰於含有硼酸之水溶液中來進行0 151581.doc •14· 201128268 含有硼酸之水溶液中之硼酸之量通常相對於水1〇〇重量伤為2 15重里伤左右，較佳為5〜12重量份。於使用磁作為二色性色素之情形時，該含有硼酸之水溶液較佳為含有碘化鉀。含有硼酸之水溶液中之碘化鉀之量通常相對於水 100重量份，為0.1〜15重量份左右’較佳為5〜12重量份左右。於含有硼酸之水溶液中之浸潰時間通常為6〇〜12〇〇秒左右，較佳為150〜600秒左右，更佳為2〇〇〜4〇〇秒左右。含有硼酸之水溶液之溫度通常為5〇t以上，較佳為 50〜85°C，更佳為60〜80。(：。硼酸處理後之聚乙烯醇系樹脂膜通常係進行水洗處理。水洗處理例如可藉由將經硼酸處理之聚乙稀醇系樹脂膜浸潰於水中來進行。水洗處理中之水之溫度通常為5〜4〇艺左右。又’浸潰時間通常為1〜120秒左右。水洗後實施乾燥處理，而獲得偏光膜。乾燥處理可使用熱風乾燥機或遠紅外線加熱器進行。乾燥處理之溫度通常為30〜10(TC左右，較佳為5〇〜8〇t。乾燥處理之時間通常為60〜600秒左右，較佳為12〇〜600秒。藉由乾燥處理使偏光膜之水分率降低至實用程度為止。該水分率通常為5〜20重量％，較佳為8〜15重量若水分率低於5重量％ ’則存在偏光膜之可撓性喪失偏光膜二该乾燥處理後產生損傷或斷裂之情形。，右水分率超過 20重量％，則存在偏光膜之熱穩定性欠佳之情形。以上述方式所獲得之偏光膜之厚度通常可達到5〜4〇左右。 151581.doc 15 201128268 (具有光學異向性之光源側保護膜）。積層於偏光膜之一面的具有光學異向性之光源側保護膜可使用透明之各種樹脂膜。作為構成透明樹脂膜之透明樹曰材料例如可列舉：二乙醯纖維素、三乙醯纖維素等乙酉义纖維素系樹脂；降冰片稀系樹脂等環狀稀烴系樹脂及其他聚烯烴樹脂；以及丙烯酸系樹脂等。其中，就成本或容易薄膜化這一優點方面而言’較佳為使用聚對苯二甲酸乙二酯樹脂。本@明之防止色彩不均之效果於光源側保護膜具有較高先學異向性之情形’尤其於面内之相位差值為200 nm以上之It形時變得顯著。例如，於使用具有較高光學異向性之延伸聚對苯—曱酸乙二醋膜之情形時，可獲得顯著效果。所谓延伸聚對苯二甲酸乙二酯膜，係指藉由熔融擠出將種以上之聚對苯二甲酸乙二酯系樹脂製成膜，並將該膜橫向延伸而成的一層以上之單軸延伸膜，或者製成膜後繼續縱向延伸’繼而橫向延伸而成的一層以上之雙軸延伸膜。聚對笨二甲酸乙二醋可藉由延伸而任意地控制折射率之異向性與由該等所規定之各種光學物性值（遲相轴、面内相位差值、Nz值等）。所5胃聚對苯二甲酿r __ ^ f夂乙一 S曰系樹脂，係指重複單元之 mol%以上由斜贫-田從，一曱酸乙二酯構成之樹脂，亦可含有1 他二羧酸成分與二醇成分。取刀作為其他二羧酸成分，並盔別限定，例如可列舉：Μ & _ ‘' ' ,，.举間本-甲酸、對(β-羥乙氧基)笨甲酸、4,4 ·一竣基聯苯、4,4,二 _ # 殘基一本甲鲷、雙（4-竣基苯 15158I.doc 201128268 基）乙烷、己二酸、癸二酸、以及丨，4_二綾基環己烷等。作為其他二醇成分，並無特別限定，可列舉：丙二醇' 丁二醇、新戊二醇、二乙二醇、環己二醇、雙酚A之環氧乙烧加成物、聚乙二醇、聚丙二醇、以及聚丨，4_丁二醇等。該等其他二羧酸成分或其他二醇成分根據需要可組合使用兩種以上。又，亦可併用對羥基苯甲酸等羥基羧酸。又’作為其他共聚成分’亦可使用含有少量之醯胺鍵、胺基甲酸酯鍵、醚鍵、以及碳酸酯鍵等的二羧酸成分或二醇成分。作為聚對苯二曱酸乙二酯系樹脂之製造方法，可採用：使對本二曱酸及乙二醇（以及視需要之其他二叛酸或其他二醇）直接聚縮合之方法、使對苯二甲酸之二烷基酯及乙二醇（以及視需要之其他二羧酸之二炫基酯或其他二醇）進行酯交換反應後進行聚縮合的方法、以及使對苯二甲酸 (以及視需要之其他二缓酸）之乙二醇酯（以及視需要之其他二醇酯）聚縮合之方法等。於各聚合反應中’可使用包含綈系、鈥系、鍺系或鋁系化合物之聚合觸媒，或者包含上述之複合化合物之聚合觸媒。該聚合反應條件只要根據所使用之單體、觸媒、反應裝置、以及目標之樹脂物性而適宜選擇即可，並無特別限制，例如反應溫度通常為約15〇艺〜約300°C ’較佳為約 200°C〜約300°C，更佳為約26CTC〜約300°C。又，其壓力通 151581.doc 201128268 常為大氣壓〜約2.7 Pa，其中較佳為在反應之後半段處於減壓側。聚合反應係藉由如下方式進行，即於此種高溫、高減壓條件下進行攪拌，藉此使二醇、烷基化合物或水等脫離反應物脫揮。又’聚合裝置可為由一個反應槽構成者、或者亦可為將複數個反應槽連接而成者。於該情形時，通常根據聚合度，一面將反應物於反應槽間移送一面進行聚合。又，亦可採用於聚合後半段設置橫型反應裝置，一面加熱、混練，一面脫揮之方法。將聚合結束後之樹脂於熔融狀態下自反應槽或橫型反應裝置中抽出後，藉由冷卻筒或冷卻帶等進行冷卻、粉碎而以片狀之形態獲得樹脂’或者將其導入至擠出機中擠出成帶狀後將其剪斷而以顆粒狀之形態獲得樹脂。進而，視需要亦可進行固相聚合，以提高分子量或減少低分子量成分。作為可包含於聚對苯二曱酸乙二酯系樹脂中之低分子量成分’可列舉環狀三聚物成分，此種環狀三聚物成分於樹脂中之含量較佳為5000 ppm以下，更佳為 3000 ppm以下。若環狀三聚物成分超過5〇〇〇 ppm，則存在對膜之光學物性產生不良影響之情形。聚對本-一曱酸乙一醋系樹脂之分子量於以如下之極限點度表示時’通常為0.45〜1.0 dL/g，較佳為0.50〜1.0 dL/g，更佳為0.52〜0.80 dL/g之範圍，上述極限黏度係將樹脂溶解於苯酚/四氣乙烷=50/50(重量比）之混合溶劑中並於30。匚 151581.doc -18· 201128268 下進行測定而獲得。極限黏度未達0.45 dL/g者存在膜製造時之生產性下降、或者膜之機械強度下降之情形。又，極限黏度超過1.0 dL/g者存在膜製造過程中聚合物之熔融擠出穩定性欠佳之情形。又，聚對苯二曱酸乙二酯系樹脂視需要可含有添加劑。作為添加劑，例如可列舉：潤滑劑、抗結塊劑、熱穩定劑、抗氧化劑、抗靜電劑、耐光劑及耐衝擊性改良劑等。添加劑之添加量較佳為處於不對光學物性造成不良影響之範圍内。由於調配上述添加劑及進行下述之膜成形，故而聚對苯一甲酸乙二酯系樹脂通常使用利用擠出機進行造粒而獲得的顆粒形狀。顆粒之大小或形狀並無特別限制，通常為高度、直徑均為5 mm以下之圓柱狀、球狀、或扁平球狀。以上述方式所獲得之聚對苯二甲酸乙二酯系樹脂藉由成形為膜狀，並進行延伸處理，可形成為透明且均質之機械強度較〶之聚對苯二甲酸乙H其製造方法並無特別限定’例如採用以下所記載之方法。首先，將經乾燥之包含聚對笨二曱酸乙二酯樹脂之顆粒仏給至熔融擠出裝置中，加熱至熔點以上使其熔融。其次，將已熔融之樹脂自模具中擠出，於旋轉冷卻筒上以達到玻璃轉移溫度以下之溫度之方式進行驟冷固化，獲得實質上為非晶狀態之未延伸m。該炫融溫度係根據所使用之聚對笨一曱酸乙二酯系樹脂之炫點或擠出機而設定並無特別限制，通常為250〜350。(：。 151581.doc -19- 201128268 又’為提高膜之平面性’較佳為提高膜與旋轉冷卻筒之密接性，可較佳地採用靜電施加密接法或液體塗佈密接法。靜電施加密接法通常係於膜之上表面側，在與膜之流向正交之方向設置線狀電極，對該電極施加約5〜10 kv之直流電壓’藉此對膜賦予靜電荷’而提高旋轉冷卻筒與膜之密接性。X，液體塗佈密接法係於旋轉冷卻筒表面之整個面或-部分(例如僅為與膜兩端部接觸 <部分)均勻地塗佈液體，藉此提高旋轉冷卻筒與膜之密接性。視需要亦可併用兩者。所使用之聚對苯二甲酸乙二酯系樹脂視需要亦可混合兩種以上之樹脂結構或組成不同之樹脂。例如可列舉：將調配有作為防結塊劑之粒狀填料、紫外線吸收劑或抗靜電劑等之顆粒與未調配之顆粒混合使用等。又，所擠出之膜之積層數視需要可為兩層以上。例如可列舉：準備調配有作為抗結塊劑之粒狀填料之顆粒與未調配之顆粒，將該等顆粒自不同之擠出機供給至同一個模具而擠出包含「調配有填料/未調配/調配有填料」之兩種三層的膜等。於獲得單軸延伸膜之情料’上述未延伸膜通常於玻璃轉移溫度以上之溫度下，藉由拉幅機進行沿著膜寬度方向 (相對於長度方向垂直之方向）之橫向㈣。該延伸溫度通常為70〜150°C，較佳為80〜130°C，更佳為9〇〜12〇。(：。又，延伸倍率通常為2.5〜6倍，較佳為3〜5.5倍。若橫向延伸之 151581.doc -20- 201128268 伸倍率未達1丨倍，則存在膜之透明性變得不良之情形。又，超過6倍之延伸倍率於工業製造技術上不現實。其後，可進行熱處理及視需要之鬆弛處理。熱處理溫度通常為150〜25(TC ’較佳為18〇〜245。〇，更佳為2〇〇〜23〇t：。熱處理時間通常為卜㈣秒，較佳為卜秒更佳為⑽ 秒。鬆弛處理之溫度通常為100〜23〇°C，較佳為11〇〜2i(TC，更佳為120〜180 C。X，鬆弛量通常為〇U%，較佳為 1〜10%，更佳為2〜5%。該鬆弛處理之溫度及鬆弛量更佳為以使鬆弛處理後之聚對苯二甲酸乙二醋膜於15代下之熱收縮率成為2%以下的方式進行設定。另一方®，於獲得雙轴延伸膜之情形_，上ϋ未延伸獏通常於玻璃轉移溫度以上之溫度下，首先沿著擠出方向進行縱向延伸。延伸溫度通常為me ，較佳為 80〜130t ’更佳為⑽抑。又，延伸倍率通常為丨丨〜6 倍’較佳為2〜5.5倍。其原因在於：若該延伸倍率未達η 倍，則存在延伸聚對苯二甲酸乙二醋膜之機械強度不足之傾向。又’若超過6倍，則存在橫向之強度於實用上不足之清形。心伸可_次完成，視需要亦可分成複數次進行。通常’較佳為於進行複數次延伸之情形時合計之延伸倍率亦為上述之範圍。其後’可對以上述方彳& ^姐达方式所獲付之縱向延伸膜進行熱處。繼而’視f要亦可進行鬆㈣理。該熱處理為150〜2抓，較佳為⑽〜2饥’更佳為·〜23〇。^ 151581 .doc -21 - 201128268 又，熱處理時間通常為卜_秒，較佳為秒 1〜60秒。尺佳為鬆他處理之溫度通常為90〜2⑽。c ’較佳為i2G〜⑽。c。又，鬆他量通常為O.MO%，較佳為2〜5%。該鬆他處理之溫度及鬆他量更佳為以使鬆他處理後之聚對苯二甲酸乙二㈣於15代下之熱收縮率成為心以方式進行設定。[Technical Field] The present invention relates to a liquid crystal display device including a backlight and an optical member group for a liquid crystal display device. [Prior Art] In recent years, liquid crystal display devices that consume low power and operate at low voltages, and are lightweight and thin are rapidly spreading as information display devices such as mobile phones, personal digital assistants, screens for computers, and televisions. Further, with the development of the liquid crystal technology, liquid crystal display devices of various modes have been proposed, and the response speed, contrast, and viewing angle which have been previously considered as problems of the liquid crystal display device are being solved. On the other hand, the liquid crystal display device is required to be further thinner and lighter in the market, and the liquid crystal panel, the diffusion plate, the backlight unit, and the driving ic constituting the liquid crystal display device are gradually thinned or miniaturized. In this case, the polarizing plate which is a constituent member of the liquid crystal panel is also required to be thinned in units of J 〇 μη. At the same time, with the popularity of liquid crystal display devices, the market is increasingly demanding to reduce costs. Further, it is necessary to further reduce costs or improve productivity for polarizing plates. In order to meet these requirements, various proposals have been made so far. For example, a polarizing plate usually has a configuration in which a transparent protective film is provided on one or both sides of a polarizing film, and the transparent protective film generally uses triacetyl cellulose, but as in JP Η 08-43812-Α, a widespread attempt is made by The protective film has a phase difference to impart an optical compensation function thereto, and seeks to reduce the constituent members and simplify the production step 151581.doc 201128268. By forming such a configuration, the composite polarizing plate which is a laminate of the polarizing plate and the phase difference plate can be made thinner and lighter, and the number of components of the liquid crystal display device can be reduced, whereby the production process can be simplified, and the yield can be improved and the composition can be reduced. Furthermore, the industry is also actively trying to replace the material of the protective film with other resins than triethylene phthalate. For example, a method of using a cyclic hydrocarbon-based resin in place of triethylenesulfide cellulose is disclosed in JPH 〇 7 776 〇 8. Iron, the ring-shaped flue-cured resin is generally expensive, so the phase difference which is currently used for higher added value is purely used as a protective film, and there is a problem that balance cannot be achieved in terms of cost reduction. As a technique which satisfies the above requirements, for example, a method of using a polyethylene terephthalate film as a protective film has been proposed. Since polyethylene terephthalate has excellent mechanical strength, it is suitable for thin film formation and can realize thinning of a polarizing plate. Further, it is also advantageous in terms of cost with triethylene sulfonate or cyclic dilute resin. In addition to the triethylene phthalate cellulose, it has low moisture permeability and low water absorption, so it is excellent in moist heat resistance and thermal shock resistance, and it is expected to have a high degree of durability for environmental changes. Sex. However, on the other hand, it is suitable for the extension of the protective film ..., the -f H5L Ο one ester film generally has a large optical anisotropy' and exhibits a high retardation. When a polarizing plate using such an optically anisotropic film as a protective film is mounted on a liquid helium display device, it is compared with a polarizing plate using triethylene terbene cellulose as a protective film. There is a problem that the self-oblique color unevenness (also known as uneven interference, uneven rainbow color) is significant, and the visual recognition is not good. Regarding this problem, for example, in JP2__1〇9993_a, a polarizing plate which uses a pair of 151581.doc 201128268 j benzoic acid ethyl ester film as a protective film and a polarizing plate which imparts an anti-glare layer controlled by a haze value is disclosed. A method of combining liquid crystal display devices to reduce color unevenness. However, this method cannot sufficiently reduce the color unevenness, and the production property is limited by the limitation of the physical property value of the protective film itself. Therefore, the industry is expected to establish a more simple and effective method. Therefore, an object of the present invention is to provide a liquid crystal display device including a backlight and a liquid crystal panel disposed on a backlight, and a light incident side polarizing plate having a film having optical anisotropy as a light source side protective film is mounted. At the same time, the color unevenness is also small, the visibility is excellent, and the thinness is achieved, and the cost performance is also excellent. Another purpose of the present invention is to provide an optical member set suitable for the above liquid crystal display device. The present inventors have made efforts to solve the above problem of color unevenness, and found that when mounted on a liquid crystal display device having a backlight and a liquid crystal panel disposed on a backlight, the device will have optical When the polarizing plate as the light source side protective film is used as the light incident side polarizing plate, the retardation axis of the light source side protective film having optical anisotropy and the optical sheet member having the above optical anisotropy are used. The angle formed by the slow phase axis (axial deviation angle) becomes 60. The underside can effectively reduce the color unevenness of the liquid crystal display device. By using the 4 = method, it is possible to achieve high visibility in a simple manner without adding new components. The thinness and the low cost are coexisting. Furthermore, in the present invention, the light source side protective film having optical anisotropy is delayed. The angle formed by the phase axis and the retardation axis of the optical sheet member having the above optical anisotropy (axial deviation angle) means the angle of the smaller one, that is, an angle of 90 or less. 151581.doc 201128268 [Summary] The present invention includes the following: a liquid crystal display device comprising a backlight and a liquid crystal panel disposed on the backlight, the liquid crystal panel comprising a liquid crystal cell and a polarizing plate attached to both sides of the liquid crystal cell Among the polarizing plates, the light incident side polarizing plate disposed on the backlight side of the liquid crystal cell has a polarizing film containing a polyvinyl alcohol resin, and a light source having optical anisotropy laminated on the backlight side of the polarizing film. a side protective film, wherein the backlight comprises a direct-side or side-light type surface light source, and an optical anisotropic optical sheet disposed at a position closest to the liquid crystal panel The light source side protective film and the optical sheet member are disposed such that the angle between the slow axis of the light source side protective film and the slow axis of the optical sheet member is 60 degrees or less. In this case, the liquid crystal display device of the invention [2] [1] has a significant difference in phase difference of 200 nm or more. [3] Liquid crystal display such as [1] or [2] And the above-mentioned light source side protective film is a polyethylene terephthalate film. The liquid crystal display device according to any one of [1] to [3], The optical sheet member is selected from the group consisting of a diffusion film, a microlens film, and a lens sheet. [5] The liquid crystal display device of any of [1] to [4], wherein the in-plane is </ RTI> 15158], doc 201128268 The refractive index in the direction of the phase axis is set to 〜, the refractive index in the direction orthogonal to the late phase axis is ny, and the refractive index in the thickness direction is ～. Therefore, (nx-nz:)/fn n, main _ Λ χτ, dlnx-ny) have a coefficient of 4 or more, or less than 2 [6] The liquid crystal Gu + gg , <-Drinking day display device of any one of [1] to [5], wherein the phase difference signal of the optical sheet member in the plane Rabbit 丨λλλ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The device includes a light incident side polarizing plate disposed on the backlight side of the liquid crystal cell; and an optical sheet member disposed on the closest side of the backlight having optical anisotropy; Polarization of the vinyl alcohol-based resin at the position The light-incident-side polarizing plate has a light-source side protective film including a poly film and an optical anisotropy laminated on one surface of the polarizing film. When used in a liquid crystal display device, the light incident side The polarizing plate is disposed such that the light source side protective film is on the backlight side, and the angle between the slow axis of the light source side protective film and the slow axis of the optical sheet member is 60. The above-described light source side protective film and the above optical sheet member are disposed in the following manner. [8] The optical member set according to [7], wherein the phase difference in the plane of the light source side protective film is 200 nm or more. In the case of this aspect, the remarkable effect of the present invention can be obtained. [9] The optical member set according to [7] or [8], wherein the light source (4) film of the towel is an extended polyethylene terephthalate film. This aspect is preferred. The optical member set according to any one of [7] to [9] wherein the optical sheet member is selected from the group consisting of a diffusion film, a microlens film, and a lens sheet. This is preferable. [11] The optical member set according to any one of [7] to [10] wherein the refractive index in the direction of the in-plane axis of the in-plane is set to ~, and the refractive index in the direction orthogonal to the axis of the late phase When the refractive index in the thickness direction is set to &, the Nz coefficient expressed by (nx-nz)/(nx-ny) of the light source side protective film is 4 or more, or less than 2. This aspect is preferred. [12] The optical member set according to any one of [7] to [i1], wherein the phase difference in the plane of the optical sheet member is 1 〇〇〇 nm or more. This aspect is preferred. According to the present invention, the deviation angle of the slow phase axis of the optical sheet member disposed on the outermost surface of the liquid crystal panel side of the backlight with respect to the slow phase axis of the light source side protective film of the light incident side polarizing plate is 6 。. Hereinafter, a liquid crystal display device having less color unevenness during display and excellent visibility can be provided. Further, according to the present invention, an optical member group suitable for the above liquid crystal display device can also be provided. [Embodiment] <Liquid Crystal Display Device> Fig. 1 is a schematic cross-sectional view showing an example of a layer configuration of a liquid crystal display device of the present invention, and shows a transmissive liquid crystal display device having a direct type or side light type backlight. The liquid crystal display device of Fig. 1 of the present invention is composed of a backlight 2A and a liquid crystal panel 80 disposed on the backlight 20. The liquid crystal panel 80 includes a liquid crystal cell 50, a light incident side polarizing plate 3A laminated on one surface of the liquid crystal cell 5 via 151581.doc 201128268, an adhesive layer 34, and an adhesive layer on the other side of the liquid crystal cell 5 44 and the laminated light exits the side polarizing plate 4〇. The liquid crystal panel 8 is usually formed by forming the adhesive layers 34 and 44 on the surfaces of the polarizing plates 30 and 40, respectively, and forming the light incident side polarizing plate 60 with the adhesive layer and the light with the adhesive layer. The exit-side polarizing plates 7 are attached, and the polarizing plates are attached to the liquid crystal cell 5 on the side of the adhesive layer. The light-incident-side polarizing plate 30 is disposed on the surface of the polarizing film 31 (the surface on the backlight side), and the "side-side protective film or optical compensation film" 33 is disposed on the other surface (the liquid crystal cell side). Adult. The adhesive layer (10) is laminated on the surface of the unit side protective film or the optical compensation film on the side of the light incident side polarizing plate 30. The light incident side polarizing plate 3 is formed as shown in Fig. 1 and the polarizing plate is thin and lightweight. In addition, it is advantageous to reduce the number of constituent members of the liquid crystal display device, thereby simplifying the production steps and improving the yield. The light-emitting side polarizing plate 40 is attached to one surface of the polarizing film 41 (on the opposite side to the liquid crystal cell) The protective film 42 is disposed on the other surface (the liquid crystal cell side), and the "unit side is protected by a vine film or an optical compensation film" 43 is disposed. The adhesive layer 44 is laminated on the surface of the light-emitting side polarizing plate 40 on the unit side protective film or the optical compensation film 43 side. Further, in the example shown in FIG. 1, the backlight 20 includes a surface light source 1A, a reflector 11 disposed on the back side of the surface light source 10 (opposite the liquid crystal panel 80), and a surface light source 10 and liquid crystal. An optical sheet member 12 (for example, a diffusion film or a lenticular sheet, etc.) between the panels 8A. The liquid crystal display device of the present invention is, for example, a liquid crystal display device having a layer structure of 151581.doc •10 to 201128268 shown in FIG. 1 so as to be disposed in the backlight of the polarizing film 31 in the light incident side polarizing plate 30. The slow phase axis of the light source side-protecting film 32 having optical anisotropy on the source 20 side, and the slow phase axis of the optical sheet member 12 having optical anisotropy disposed at the position closest to the liquid crystal panel in the backlight 2 The angle formed (axial deviation angle) becomes 60. In the following manner, the light source side protective film 32 and the optical sheet member 12 are disposed. The axis deviation angle is preferably 45. the following. The axis deviation angle is 0. In the case of the case, the effect of preventing color unevenness is the highest, but in the continuous manufacturing, the axis deviation angle of the range in which the color unevenness effect is prevented from being non-destructive is allowed. Further, the light-incident-side polarizing plate and the optical sheet member constituting the liquid crystal display device have a rectangular shape, and are generally produced by a liquid crystal display device. Preferably, the light-side protective film of the light-incident-side polarizing plate is used. The deviation angle of the slow axis from the long side of the rectangle and the deviation angle of the slow axis of the optical sheet member with respect to the long side of the rectangle are set to 45, respectively. The angle of deviation of the retardation axis of the light source side protective film of the light incident side polarizing plate with respect to the short side of the rectangle and the deviation angle of the slow axis of the optical sheet member with respect to the short side of the rectangle are respectively set to 45 . Within. In the above case, the slow phase axis of the optical sheet member may be 6 相对 with respect to the slow phase axis of the light source side protective film of the light incident side polarizing plate. Configure in the following ways. Hereinafter, the liquid crystal display device of the present invention will be described in more detail. <Light incident side polarizing plate> The light incident side polarizing plate used in the present invention includes a polarizing film containing a polyvinyl alcohol resin and is disposed on one surface of the polarizing film (liquid crystal display device 151581.doc 201128268) A light source side protective film having optical anisotropy on the surface on the backlight side. Further, the light incident side polarizing plate used in the present invention may further include a unit side protective film or an optical compensation film disposed on the liquid crystal cell side of the polarizing film (the surface opposite to the surface on which the light source side protective film is disposed). In the present invention, it is preferable that the light source side protective film is bonded to only one surface (backlight side) of the polarizing film, and the optical compensation film is directly bonded to the other surface of the polarizing film. The reason for this is that it is advantageous in terms of the thinness and weight reduction of the polarizing plate, and the number of constituent members of the liquid crystal display device can be reduced, thereby simplifying the production steps and improving the yield. Further, a protective film (a light source side protective film and a liquid crystal cell side protective film) may be bonded to both surfaces of the polarizing film, and an optical compensation film may be laminated on the liquid crystal cell side protective film. At this time, the liquid crystal cell side protective film laminated on the liquid crystal cell side (optical compensation film side) of the polarizing film is generally a film having a small optical anisotropy. (Polarizing film) The polarizing film used in the present invention can be produced, for example, by a step of uniaxially stretching a polyvinyl alcohol-based resin film by a known method, and dyeing the polyvinyl alcohol-based resin film with a dichroic dye. The step of adsorbing the dichroic dye; the step of treating the polyvinyl alcohol-based resin film having the dichroic dye adsorbed thereon by the aqueous solution of boric acid; and the step of washing with water after the treatment with the aqueous solution of boric acid. As the polyvinyl alcohol-based resin, a polyvinyl acetate-based resin can be used. As the polyvinyl acetate-based resin, in addition to the polyacetate which is a homopolymer of ethyl acetate 151581.doc -12·201128268, the copolymerization of ethyl acetate vinegar with other monomers copolymerizable therewith can be cited. Things and so on. Examples of the other monomer which can be copolymerized with ethylene acetate vinegar include unsaturated carboxylic acid 'olefins, ethyl (tetra), unsaturated materials, and acrylamides having (d). The degree of saponification of the polyvinyl alcohol-based resin is usually from 85 to 100% of the claws, preferably about 98 mol% or more. The polyethylene glycol-based resin may be modified, for example, an acid-modified polymer may be used. Further, the degree of polymerization of the polyvinyl alcohol-based resin and the resin is usually about ～1G, _, preferably about 1,500 to 5,000. The polyvinyl alcohol-based resin is used. The film can be used as a material film for a polarizing film. The method for forming a film of a polyethylene glycol-based resin is not particularly limited to that a film can be formed by a known method. The film thickness of the polyethylene material film is not particularly controlled. For example, it is about 10 μπι to 150 μηι. The uniaxial extension of the polyvinyl alcohol-based resin film can be carried out before the dyeing of the dichroic dye, or simultaneously with the dyeing, or after the (four) color. When the dyeing is performed after the uniaxial stretching The uniaxial extension may also be performed at the same time: before, or during the boric acid treatment. Further, the uniaxial extension may be performed in the plurality of stages. Uniaxial extension between different rolls can also The uniaxial stretching is carried out by a hot roll, and the uniaxial stretching may be a dry stretching in which stretching is performed in the atmosphere, or may be a wet stretching in which the polyethylene glycol resin film is stretched in a state of being expanded using a solvent. The magnification is usually about 3 to 8 times. 151581.doc 13 201128268 As a method for utilizing a dichroic dye to polyethylene, for example, an ancient solution in an aqueous solution containing a polyethylene glycol-based resin is provided. Color pigment iodine or dichroic material. /, body and $' can be used. It is preferred to apply the immersion in water to the polyacetate resin film before dyeing. The color of the color + the phenol is usually carried out by using the aqueous solution of the polyethylene-eucalyptus L-containing potassium sulphate. The content of the broken solution in the aqueous solution is 0.0W, H, and right. The content of potassium iodide is usually about 5 to 2 parts by weight based on 100 parts by weight of water. The temperature is usually 2. to 4 (about TC. ", the aqueous solution is again, the time of the impregnation in the aqueous solution (dyeing Time 20~1,800 seconds or so. Ten horses another When a coloring dye is used as the dichroic dye, a method in which a polyvinyl alcohol-based resin film is impregnated into an aqueous solution containing a water-soluble dichroic dye for dyeing is generally used. The content of the dye is usually about 1 part by weight to about 1 part by weight, preferably about 1 part by weight to about 1 part by weight, preferably about 1 part by weight of the Ixio-Li. The aqueous solution may also contain an inorganic salt such as sodium salt as a dyeing auxiliary. The temperature of the aqueous solution of the dichroic dye used for dyeing is usually about 20 to 80 ° C. Further, the immersion time (dyeing time) in the aqueous solution is usually about 10 to 1,800 seconds. The dyed boric acid treatment can usually be carried out by impregnating the dyed polyvinyl alcohol resin film in an aqueous solution containing boric acid. 151581.doc •14·201128268 The amount of boric acid in an aqueous solution containing boric acid is usually relative to The water weight loss is about 2 15 weight injuries, preferably 5 to 12 parts by weight. In the case where magnetic is used as the dichroic dye, the aqueous solution containing boric acid preferably contains potassium iodide. The amount of potassium iodide in the aqueous solution containing boric acid is usually about 0.1 to 15 parts by weight, preferably about 5 to 12 parts by weight, per 100 parts by weight of water. The immersion time in the aqueous solution containing boric acid is usually about 6 〇 to 12 〇〇 seconds, preferably about 150 to 600 seconds, more preferably about 2 〇〇 to 4 〇〇 seconds. The temperature of the aqueous solution containing boric acid is usually 5 Torr or more, preferably 50 to 85 ° C, more preferably 60 to 80. (: The polyvinyl alcohol-based resin film after the boric acid treatment is usually subjected to a water washing treatment. The water washing treatment can be carried out, for example, by impregnating a boric acid-treated polyvinyl alcohol-based resin film in water. The temperature is usually about 5 to 4 。, and the 'dipping time is usually about 1 to 120 seconds. After washing with water, drying treatment is performed to obtain a polarizing film. The drying treatment can be carried out using a hot air dryer or a far infrared heater. The temperature is usually 30 to 10 (about TC, preferably 5 〇 to 8 〇 t. The drying treatment time is usually about 60 to 600 seconds, preferably 12 〇 to 600 seconds. The drying film is used to make the polarizing film The moisture content is reduced to a practical level. The moisture content is usually 5 to 20% by weight, preferably 8 to 15% by weight. If the moisture content is less than 5% by weight, the flexibility of the polarizing film is lost. In the case where damage or breakage occurs, the right moisture content exceeds 20% by weight, and the thermal stability of the polarizing film is poor. The thickness of the polarizing film obtained in the above manner is usually about 5 to 4 。. 1.doc 15 201128268 (Light source side protective film with optical anisotropy). A light source side protective film having an optical anisotropy laminated on one surface of a polarizing film can be used as a transparent resin film as a transparent resin film. Examples of the tree scorpion material include an acetaminophen cellulose resin such as diethyl phthalocyanine or triethyl fluorene cellulose; a cyclic rare hydrocarbon resin such as a norbornene thin resin; and other polyolefin resins; and an acrylic resin. Among them, in terms of the cost or the advantage of easy film formation, it is preferable to use a polyethylene terephthalate resin. The effect of preventing the color unevenness on the light source side protective film has a high a priori anisotropy. The case 'is particularly remarkable when the phase difference in the plane is more than 200 nm. For example, when using an extended polyethylene terephthalate film having a higher optical anisotropy, A remarkable effect is obtained. The extended polyethylene terephthalate film refers to a film obtained by melt-extruding a polyethylene terephthalate resin of a type or more and extending the film laterally. More than one layer of uniaxially stretched film, or more than one layer of biaxially stretched film which continues to extend longitudinally after being formed into a film, and then laterally extended. Poly(p-diethylammonate) can be arbitrarily controlled by stretching. Anisotropy and various optical property values (slow phase axis, in-plane phase difference, Nz value, etc.) prescribed by the above. 5 gastric poly-p-phenylene br-r-_^^ f夂-S-S-based resin, It refers to a resin consisting of more than mol% of the repeating unit, which is composed of slant-poor, succinic acid, ethylene glycol diester, and may also contain a di-dicarboxylic acid component and a diol component. Other examples include, for example, Μ & _ '' ' , ,, 举 - - formic acid, p-(β-hydroxyethoxy) benzoic acid, 4,4 fluorenylbiphenyl, 4, 4, _# Residue one is formazan, bis(4-mercaptobenzene 15158I.doc 201128268) ethane, adipic acid, sebacic acid, and hydrazine, 4-didecylcyclohexane. The other diol component is not particularly limited, and examples thereof include propylene glycol, butanediol, neopentyl glycol, diethylene glycol, cyclohexanediol, and epoxidized ethylene aceductate of bisphenol A. Alcohol, polypropylene glycol, and polyfluorene, 4-butanediol, and the like. These other dicarboxylic acid components or other diol components may be used in combination of two or more kinds as needed. Further, a hydroxycarboxylic acid such as p-hydroxybenzoic acid may also be used in combination. Further, as the other copolymerization component, a dicarboxylic acid component or a diol component containing a small amount of a guanamine bond, a urethane bond, an ether bond, a carbonate bond or the like may be used. As a method for producing a polyethylene terephthalate-based resin, a method of directly polycondensing the present dicarboxylic acid and ethylene glycol (and optionally other two retinoic acids or other diols) may be employed. a method of performing polycondensation after a transesterification reaction of a dialkyl phthalate and ethylene glycol (and optionally a dimeryl ester of a dicarboxylic acid or other diol), and a terephthalic acid (and A method of polycondensation of an ethylene glycol ester (and other glycol esters as needed) of other diacids as needed. In the polymerization reaction, a polymerization catalyst containing a lanthanoid, lanthanide, lanthanide or aluminum compound or a polymerization catalyst comprising the above composite compound can be used. The polymerization reaction conditions are not particularly limited as long as it is appropriately selected depending on the monomer, catalyst, reaction apparatus, and target resin properties to be used, and for example, the reaction temperature is usually from about 15 to about 300 ° C. Preferably, it is from about 200 ° C to about 300 ° C, more preferably from about 26 CTC to about 300 ° C. Further, the pressure is 151,581.doc 201128268, which is usually from atmospheric pressure to about 2.7 Pa, and preferably it is on the depressurization side in the second half of the reaction. The polymerization reaction is carried out by stirring under such high temperature and high pressure reduction conditions, whereby the diol, the alkyl compound, water or the like is detached from the reaction product. Further, the polymerization apparatus may be composed of one reaction tank or may be connected by a plurality of reaction tanks. In this case, the polymerization is usually carried out while transferring the reactants between the reaction tanks depending on the degree of polymerization. Further, it is also possible to employ a method in which a horizontal reaction apparatus is provided in the second half of the polymerization, and the mixture is heated and mixed while being detached. After the resin after the completion of the polymerization is extracted from the reaction tank or the horizontal reaction apparatus in a molten state, the resin is cooled or pulverized by a cooling cylinder or a cooling belt to obtain a resin in a sheet form or introduced into the extrusion. After extruding into a belt shape in the machine, it was cut and the resin was obtained in the form of pellets. Further, solid phase polymerization may be carried out as needed to increase the molecular weight or to reduce the low molecular weight component. The low molecular weight component which can be contained in the polyethylene terephthalate resin is a cyclic trimer component, and the content of the cyclic trimer component in the resin is preferably 5,000 ppm or less. More preferably, it is 3000 ppm or less. When the cyclic trimer component exceeds 5 〇〇〇 ppm, there is a case where the optical properties of the film are adversely affected. The molecular weight of the poly-p-acetic acid ethyl vinegar-based resin is usually 0.45 to 1.0 dL/g, preferably 0.50 to 1.0 dL/g, more preferably 0.52 to 0.80 dL/g, as expressed by the following limit points. In the above range, the above-mentioned ultimate viscosity is obtained by dissolving the resin in a mixed solvent of phenol/tetra-ethane ethane = 50/50 (weight ratio) at 30. 151 151581.doc -18· 201128268 Obtained by measurement. When the ultimate viscosity is less than 0.45 dL/g, there is a case where the productivity at the time of film production is lowered or the mechanical strength of the film is lowered. Further, in the case where the limit viscosity exceeds 1.0 dL/g, there is a case where the melt extrusion stability of the polymer during film production is poor. Further, the polyethylene terephthalate resin may contain an additive as needed. Examples of the additive include a lubricant, an anti-caking agent, a heat stabilizer, an antioxidant, an antistatic agent, a light stabilizer, and an impact resistance improver. The amount of the additive to be added is preferably in a range which does not adversely affect the optical properties. Since the above additives are blended and film formation described below is carried out, the polyethylene terephthalate resin is usually in the form of particles obtained by granulation by an extruder. The size or shape of the particles is not particularly limited, and is usually a cylindrical shape, a spherical shape, or a flat spherical shape having a height of 5 mm or less. The polyethylene terephthalate resin obtained in the above manner can be formed into a film shape and subjected to elongation treatment to form a transparent and homogeneous mechanical strength of polyethylene terephthalate H. It is not particularly limited to, for example, the method described below. First, the dried pellets containing the polyethylene terephthalate resin are supplied to a melt extrusion apparatus and heated to a melting point or higher to be melted. Next, the molten resin is extruded from the mold, and quenched and solidified on the rotary cooling cylinder so as to reach a temperature lower than the glass transition temperature, thereby obtaining an unextended m which is substantially amorphous. The glaze temperature is not particularly limited depending on the sleek point or the extruder of the poly(p-butylene phthalate) resin to be used, and is usually 250 to 350. (: 151581.doc -19- 201128268 Further, in order to improve the planarity of the film, it is preferable to improve the adhesion between the film and the rotary cooling cylinder, and it is preferable to use an electrostatic application adhesion method or a liquid coating adhesion method. The adhesion method is usually performed on the upper surface side of the film, and a linear electrode is disposed in a direction orthogonal to the flow direction of the film, and a DC voltage of about 5 to 10 kV is applied to the electrode, thereby imparting an electrostatic charge to the film to improve spin cooling. The adhesion between the cylinder and the film. X, the liquid coating adhesion method is applied to the entire surface or the portion of the surface of the rotary cooling cylinder (for example, only the contact with the both end portions of the membrane is uniformly applied), thereby increasing the rotation. The adhesion between the cooling cylinder and the film may be used in combination with the two. The polyethylene terephthalate resin to be used may be mixed with two or more kinds of resins having different resin structures or compositions as needed. The particles of the particulate filler, the ultraviolet absorber, the antistatic agent, and the like, which are used as an anti-caking agent, are mixed with the unadjusted particles, etc. Further, the number of layers of the film to be extruded may be two or more layers as needed. For example, can be listed Lifting: Prepare the granules with the granular filler as anti-caking agent and the unadjusted granules, and the granules are supplied to the same mold from different extruders and extruded to contain “mixed/unmixed/distributed Two kinds of three-layer films with fillers, etc. In the case of obtaining a uniaxially stretched film, the above unstretched film is usually carried out in a film width direction by a tenter at a temperature above the glass transition temperature (relative to The transverse direction of the longitudinal direction is (4). The extension temperature is usually 70 to 150 ° C, preferably 80 to 130 ° C, more preferably 9 〇 to 12 〇. (:. Further, the stretching ratio is usually 2.5 〜 6 times, preferably 3 to 5.5 times. If the lateral extension of 151581.doc -20-201128268 is less than 1 times, the transparency of the film becomes poor. Further, the stretching ratio exceeds 6 times. It is not practical in industrial manufacturing technology. Thereafter, heat treatment and relaxation treatment may be carried out as needed. The heat treatment temperature is usually 150 to 25 (TC ' is preferably 18 〇 to 245. 〇, more preferably 2 〇〇 to 23 〇). t: The heat treatment time is usually bu (four) seconds, preferably better. (10) sec. The temperature of the relaxation treatment is usually 100 to 23 〇 ° C, preferably 11 〇 2 2i (TC, more preferably 120 to 180 C. X, the amount of relaxation is usually 〇 U%, preferably 1 to 10 More preferably, it is 2 to 5%. The temperature and the amount of relaxation of the relaxation treatment are more preferably such that the heat shrinkage ratio of the polyethylene terephthalate film after the relaxation treatment is 2% or less in the 15th generation. The other side, in the case of obtaining a biaxially stretched film _, the upper ridge is not extended, usually at a temperature above the glass transition temperature, first longitudinally extending along the extrusion direction. The extension temperature is usually me, preferably For 80~130t', it is better (10). In addition, the stretching ratio is usually 丨丨~6 times', preferably 2~5.5 times. The reason for this is that if the stretching ratio is less than η, the mechanical strength of the extended polyethylene terephthalate film tends to be insufficient. Further, if it exceeds 6 times, there is a clear shape in which the strength in the lateral direction is insufficient in practical use. The heart extension can be completed _ times, and can be divided into multiple times as needed. Usually, the extension ratio which is preferably in the case of performing a plurality of extensions is also in the above range. Thereafter, the longitudinally stretched film obtained by the above method can be heat-treated. Then, depending on the f, it is also possible to carry out the loose (four) theory. The heat treatment is 150 to 2, preferably (10) to 2, and more preferably ~23. ^ 151581 .doc -21 - 201128268 Further, the heat treatment time is usually _ seconds, preferably seconds 1 to 60 seconds. The temperature of the ruler is usually 90~2 (10). c ' is preferably i2G to (10). c. Further, the amount of pine is usually O.MO%, preferably 2 to 5%. The temperature and the amount of the loosening treatment are preferably set so that the heat shrinkage ratio of the polyethylene terephthalate (the fourth) after the treatment of the pine is 15 times.

,於獲得雙軸延伸膜之情形時，通常於縱向延伸處理之後、或者視需要經熱處理或鬆弛處理後，藉橫向延伸。該延伸溫度通常心〜⑽，較H 80〜130°C ’更佳為9〇〜i2〇°c。又，征柚拉^ UL又’延伸倍率通常為1.1〜6 倍’較佳為2〜5.5倍。若橫向延伸中之延伸倍率未達1.1倍，則存在藉由配向未充分提高膜強度之情形。又’超過6倍之延伸倍率於工業製造技術上不現實。、其後，可進行熱處理及視需要之鬆弛處理。熱處理溫度通常為150〜250t，較佳為⑽〜245t，更佳為·〜23吖。熱處理時間通常為1〜60〇秒，較佳為丨〜300秒，更佳為卜6〇秒。鬆弛處理之溫度通常為1〇〇〜23〇r，較佳為ιι〇〜2i〇e>c，更佳為120〜180°c。又’鬆他量通常為W較佳為 1〜10% ’更佳為2〜5%。該鬆弛處理之溫度及鬆弛量較佳為以使鬆弛處理後之聚對笨二甲酸乙二賴於15代下之熱收縮率成為2。/。以下的方式進行設定。 151581.doc •22· 201128268 於獲得單軸延伸及雙轴延伸膜之情形時，通常於縱向延伸處理之後、或者視需要經熱處理或鬆弛處理後，藉由拉幅機進行橫向延伸。該延伸溫度通常為7〇〜15(rc，較佳為 8〇〜13(TC，更佳為90〜12(rc。又，延伸倍率通常為丨丨〜6 倍，較佳為2〜5.5倍。若橫向延伸中之延伸倍率未達“ 倍，則存在藉由配向未充分提高膜強度之情形。又，超過 6倍之延伸倍率於工業製造技術上不現實。、其後，可進行熱處理及視需要之鬆弛處理。熱處理溫度通常為150〜250°C，較佳為18〇〜245。〇，更佳為細〜23吖。熱處理時間通常為L秒，較佳為卜3⑼秒，更佳為卜秒。鬆他處理之溫度通常y〇〇〜23(rc，較佳為ιι〇〜2阶，更佳為120〜18(^。又，鬆弛量通常為q」〜游。，較佳為 1〜10% ’更佳為2〜5%。該鬆弛處理之溫度及鬆弛量較佳為以使鬆弛處理後之聚料贫_ β 傻之\對本一甲酸乙二酯膜於150t下之熱收縮率成為2%以下的方式進行設定。若該延伸處理溫度超過化、或者結晶化過快而若延伸處理溫度未達或者膜固化而使得延於單軸延伸及雙軸延伸處理中， 250 C，則均存在因樹脂產生熱劣導致光學性能下降之情形。又， 70 C，則均存在延伸產生過大應力伸本身無法進行之情形。平神延狎及雙軸延伸處為緩和以彎曲為代表、开，叮“ <表之配向主軸之相對於延伸方向的可再\進行熱處理、或者進行延伸處理。 15158I.doc -23· 201128268 再者延伸或橫向延伸中之延此處之延伸方向表示縱向二曱酸乙二酯膜之雙軸延大於縱向延伸倍率，因此伸倍率較大的方向。於聚對苯伸中’通常使橫向延伸倍率略於此情形時，延伸方向係指與上述膜之長度方向垂直之方向。又，於單軸延伸中’⑨常如上述般沿著橫向延伸，因此於此情形時，延伸方向同樣指與長度方向垂直之方向0 又，此處之配向主軸表示延伸聚對苯二曱酸乙二醋膜上之任意之點的分子配向方向，指遲相軸。該遲相轴相對於延伸方向之變形表示遲相軸與延伸方向之角度差。上述遲相軸例如可使用相位差膜·光學材料檢查裝置 RETS(大塚電子（〇tsuka Electronics)股份有限公司製造）、或者分子配向計M〇A(王子計測機器（〇ji Scientific Instruments)股份有限公司製造）等進行測定。於延伸聚對苯二甲酸乙二酯膜中，上述縱向延伸或橫向延伸中之延伸倍率在控制作為膜面内之遲相軸方向之折射率的nx、作為面内與遲相軸正交之方向之折射率的、作為厚度方向之折射率之〜方面係最重要之因數，一般而 5 ’於延伸聚對苯二甲酸乙二酯膜之製作過程中，單軸延伸適合於製作以（nx-nz)/(nx_ny)表示之NZS數相對較小之膜’雙軸延伸適合於製作Nz係數相對較大之膜。於本發明中所使用之偏光板中，作為上述延伸聚對苯二甲酸乙二酯膜，較佳為Nz係數為4以上或未達2者。Nz係數為4以上之延伸聚對苯二甲酸乙二酯膜可藉由雙軸延伸 l5J5Si.doc • 24· 201128268 較佳地製作，Nz係數未達2之延伸聚對苯二曱酸乙二酯膜可藉由單軸延伸較佳地製作。藉由採用此種光學性能之延伸聚對苯二曱酸乙二酯膜，可在某種程度上減少搭載有上述偏光板之液晶顯示裝置中之色彩不均。Nz係數若為4以上，則越大越發揮減少色彩不均之效果，若未達2，則越小越發揮減少色彩不均之效果。於Nz係數為2以上且未達4 之情形時，存在搭載有上述偏光板之液晶顯示裝置中色彩不均變得相對較強之傾向。於本發明t所使用之偏光板中，延伸聚對苯二甲酸乙二酯之遲相軸相對於偏光膜之透射軸的軸偏差角度可根據目的或生產上之制約而任意選擇。例如，於將本發明之偏光板用作具備正面方向之偏光性較強之背光光源的液晶顯示裝置之背光源側（光入射側）偏光板之情形時為防止源自 k伸聚對笨一曱酸乙二酯膜之面内相位差的來自正面方向之干涉色之顯現，較佳為偏光膜與延伸聚對苯二甲酸乙二酯膜之軸偏差角度較小。較佳為將延伸聚對苯二甲酸乙二酯之遲相軸相對於偏光膜之透射軸的軸偏差角度設為0度以上、I5度以下之範圍。於上述情形時將Nz係數設定為 4以上或未達2亦可有效地減少色彩不均。作為偏光性較強之背光光源，例如可列舉於背光單元内具備反射型偏光分離膜者等。所謂反射型偏光分離膜係指具有错由選擇性地反射、再利用背絲之光來提高可見範圍之亮度之功能的膜。作為相當於反射型偏光分離膜的市售品’有美國3M公司[日本為住友3M(股）]銷售之 151581.doc 25· 201128268 DBEF」（商品名）等。另:方面’於上述以外之情形時，亦可較佳地使用延伸聚對苯一甲酸乙二s旨之遲相軸相對於偏光膜之透射轴的偏差角度較大者。其中，更佳為偏差角度為2〇度以上、度以下者°藉由將偏光膜與延伸聚對苯：甲酸乙二酿膜之轴偏差角度設定為上述範圍，可進一步減少液晶顯示裝置之色彩不均。本七月中之延伸聚對苯二甲酸乙二酯膜中，為將各種光學物性值（遲相軸、面内相位差值、Nz係數等）控制於特定範圍内，可無限制地採用公知之所有技術。具體而言，可藉由調整上述延伸處理時之延伸溫度、延伸倍率、鬆弛處理、線速等延伸條件進行控制。又，於延伸聚對苯二曱酸乙二酯膜素材中，時常可見在寬度方向（相對於長度方向垂直之方向）上存在以彎曲為代表之遲相軸之變形，或面内相位差值、Nz係數之不均的情況。針對此種延伸聚對苯二甲酸乙二酯膜，視需要亦可僅選擇性地使用具有目標之光學性能之寬度範圍。作為控制本發明中所使用之偏光板中之偏光膜之透射軸與延伸聚對苯二甲酸乙二酯膜之遲相軸的軸偏差角度之方法’亦可列舉如下之方法：延伸聚對苯二甲酸乙二酯膜素材本身使用將延伸方向與遲相轴調整成目標之角度範圍内者’或者如上述般，視需要僅選擇性地使用具有目標之光學性能之寬度範圍。又’當於偏光膜上積層延伸聚對苯二甲酸乙二酯膜時，亦可將偏光膜之透射軸方向與延伸聚對 151581.doc -26· 201128268 本二甲酸乙二酯膜之遲相軸方向的偏差角度調整至目標角度範圍後進行貼合。於採用前一方法之情形時，可藉由捲對捲（Roll-t0-R0】丨）方式將偏光膜與延伸聚對苯二甲酸乙二醋膜貼合，因此於生產性及成本方面優異。用於本發明中所使用之偏光板的延伸聚對苯二甲酸乙二酯膜的厚度較佳為15〜75 μιη之範圍，更佳為2〇〜6〇範圍。於延伸聚對苯二甲酸乙二酯膜之厚度未達15 之情形時’存在難以操作（操作性欠佳）之傾向，又於厚度超過75 μηι之情形時，存在因成為厚膜，故成本提高，進而薄壁化之優勢減弱之傾向。以上述方式所獲得之延伸聚對苯二甲酸乙二酯膜可容易地獲得市售品，例如可列舉如下商品名：「Diaf〇i丨」、「Hostaphan」、「Fusi〇n」（以上，三菱樹脂股份有限公司製造’商品名），「Teijin Tetoron Film」、「Melinex」、「Mylar」、「Teflex」（以上’杜邦帝人薄膜（Dup〇nt Teijin Films)股份有限公司製造，商品名），「Toy〇b〇 EeterIn the case of obtaining a biaxially stretched film, it is usually extended laterally after the longitudinal stretching treatment or, if necessary, after heat treatment or relaxation treatment. The extension temperature is usually ~(10), more preferably 9 〇~i2 〇 °c than H 80 to 130 ° C '. Further, the scent of the scented granules is generally 1.1 to 6 times, preferably 2 to 5.5 times. If the stretching ratio in the lateral stretching is less than 1.1 times, there is a case where the film strength is not sufficiently increased by the alignment. Moreover, the extension ratio of more than 6 times is unrealistic in industrial manufacturing technology. Thereafter, heat treatment and relaxation treatment as needed may be performed. The heat treatment temperature is usually from 150 to 250 t, preferably from (10) to 245 t, more preferably from ~23 Torr. The heat treatment time is usually from 1 to 60 sec., preferably from 丨 to 300 seconds, more preferably from about 6 sec. The temperature of the relaxation treatment is usually from 1 Torr to 23 Torr, preferably from ιι〇 to 2i〇e>c, more preferably from 120 to 180 °C. Further, the amount of the loose amount is usually preferably from 1 to 10% by weight, more preferably from 2 to 5%. The temperature and the amount of relaxation of the relaxation treatment are preferably such that the heat shrinkage ratio of the polyethylene terephthalate after the relaxation treatment in the 15th generation is 2. /. Set the following methods. 151581.doc •22· 201128268 In the case of obtaining a uniaxially extending and biaxially stretched film, it is usually carried out by a tenter after the longitudinal stretching treatment or, if necessary, after heat treatment or relaxation treatment. The extension temperature is usually 7 〇 15 15 (rc, preferably 8 〇 13 (TC), more preferably 90 to 12 (rc. Further, the stretching ratio is usually 丨丨~6 times, preferably 2 to 5.5 times. If the stretching ratio in the lateral extension is less than "doubled, there is a case where the film strength is not sufficiently increased by the alignment. Further, the stretching ratio exceeding 6 times is unrealistic in industrial manufacturing technology. Thereafter, heat treatment and heat treatment are possible. The heat treatment temperature is usually 150 to 250 ° C, preferably 18 〇 to 245. 〇, more preferably 〜23 吖. The heat treatment time is usually L seconds, preferably 3 (9) seconds, preferably For the second, the temperature of the processing is usually y〇〇~23 (rc, preferably ιι〇~2, more preferably 120~18 (^. Again, the amount of relaxation is usually q)~ swim., preferably 1 to 10%' is more preferably 2 to 5%. The temperature and the amount of relaxation of the relaxation treatment are preferably such that the material after the relaxation treatment is poor _β silly to the original ethylene formate film at 150t The heat shrinkage rate is set to be 2% or less. If the elongation treatment temperature is exceeded or the crystallization is too fast, the elongation treatment temperature is not reached. When the film is cured and extended in the uniaxial stretching and biaxial stretching treatment, 250 C, there is a situation in which the optical properties are degraded due to the heat generation of the resin. Moreover, the 70 C is extended to produce an excessive stress and cannot stretch itself. In the case of the process, the flattening and biaxial extensions are moderated by the bending, and the 叮" <the alignment of the alignment main axis of the table can be further heat treated or extended. 15158I.doc -23· 201128268 The extension direction of the extension or the lateral extension here indicates that the biaxial extension of the longitudinal diacetate film is larger than the longitudinal extension ratio, and therefore the direction of the magnification is larger. In the polyparaphenylene extension 'When the lateral stretching magnification is slightly lower than this, the extending direction means a direction perpendicular to the longitudinal direction of the film. Further, in the uniaxial stretching, '9 often extends in the lateral direction as described above, so in this case, The direction of extension also refers to the direction perpendicular to the length direction 0. Here, the alignment major axis indicates the molecular alignment direction of any point on the polyethylene terephthalate film. The retardation axis indicates the angular difference between the slow axis and the extending direction. The retardation axis can be, for example, a retardation film and an optical material inspection device RETS (〇tsuka Electronics) Measured by a company, or a molecular alignment meter M〇A (manufactured by Oji Scientific Instruments Co., Ltd.), etc. In the extended polyethylene terephthalate film, the above-mentioned longitudinal extension or lateral extension The stretching ratio is the most important in controlling the refractive index of the retardation axis direction in the film plane, the refractive index in the direction orthogonal to the retardation axis, and the refractive index in the thickness direction. Factor, generally 5' in the production of extended polyethylene terephthalate film, uniaxial extension is suitable for making a film with a relatively small number of NZS represented by (nx-nz) / (nx_ny) The extension is suitable for making a film having a relatively large Nz coefficient. In the polarizing plate used in the present invention, as the extended polyethylene terephthalate film, the Nz coefficient is preferably 4 or more or less than 2. An extended polyethylene terephthalate film having an Nz coefficient of 4 or more can be preferably produced by biaxially stretching l5J5Si.doc • 24· 201128268, and an extended polyethylene terephthalate having an Nz coefficient of less than 2 The film can be preferably produced by uniaxial stretching. By using the extended polyethylene terephthalate film having such an optical property, the color unevenness in the liquid crystal display device equipped with the above polarizing plate can be reduced to some extent. When the Nz coefficient is 4 or more, the effect of reducing color unevenness is exhibited as the larger the value is, and if it is less than 2, the effect of reducing color unevenness is exhibited as the smaller. When the Nz coefficient is 2 or more and less than 4, the color unevenness in the liquid crystal display device in which the polarizing plate is mounted tends to be relatively strong. In the polarizing plate used in the present invention t, the axial deviation angle of the retardation axis of the extended polyethylene terephthalate with respect to the transmission axis of the polarizing film can be arbitrarily selected depending on the objective or production constraints. For example, when the polarizing plate of the present invention is used as a backlight side (light incident side) polarizing plate of a liquid crystal display device having a backlight source having a strong polarization in the front direction, it is prevented from being stretched by k. The appearance of the interference color from the front direction of the in-plane phase difference of the ethylene phthalate film is preferably such that the angle of deviation between the polarizing film and the extended polyethylene terephthalate film is small. Preferably, the axis deviation angle of the retardation axis of the extended polyethylene terephthalate with respect to the transmission axis of the polarizing film is set to be in the range of 0 or more and I5 or less. Setting the Nz coefficient to 4 or more or less than 2 in the above case can also effectively reduce color unevenness. As a backlight source having a high degree of polarization, for example, a person having a reflection type polarization separation film in a backlight unit can be cited. The reflective polarization separation film refers to a film having a function of selectively reflecting and reusing the light of the back wire to improve the brightness in the visible range. As a commercial product corresponding to a reflective polarizing separation film, there is a 151581.doc 25·201128268 DBEF (trade name) sold by 3M Company of the United States [Japan Sumitomo 3M Co., Ltd.]. On the other hand, in the case other than the above, it is also preferable to use a larger deviation angle of the retardation axis with respect to the transmission axis of the polarizing film for extending the polyethylene terephthalate. In particular, it is more preferable that the deviation angle is 2 degrees or more and less than the degree. By setting the axial deviation angle of the polarizing film and the extended polyparaphenylene: formic acid ethylene film to the above range, the color of the liquid crystal display device can be further reduced. Uneven. In the extended polyethylene terephthalate film in the middle of July, various optical property values (slow phase axis, in-plane phase difference value, Nz coefficient, etc.) are controlled within a specific range, and can be used without limitation. All the technology. Specifically, it can be controlled by adjusting the extension conditions such as the extension temperature, the stretching ratio, the relaxation processing, and the line speed at the time of the extension processing. Further, in the extended polyethylene terephthalate film material, it is often seen that there is a deformation of the slow phase axis represented by the bending in the width direction (the direction perpendicular to the longitudinal direction), or the in-plane retardation value. And the unevenness of the Nz coefficient. For such an extended polyethylene terephthalate film, it is also possible to selectively use only a wide range of the optical properties of the target. As a method of controlling the axis deviation angle of the transmission axis of the polarizing film in the polarizing plate used in the present invention and the retardation axis of the extended polyethylene terephthalate film, a method of extending the polyparaphenylene can also be cited. The ethylene dicarboxylate film material itself is used to adjust the direction of elongation and the axis of the slow phase to the target angle range' or as described above, only the width range having the optical properties of the target is selectively used as needed. 'When a polyethylene terephthalate film is laminated on a polarizing film, the transmission axis direction of the polarizing film may be delayed from the extended polyethylene pair 151581.doc -26· 201128268 The deviation angle of the axial direction is adjusted to the target angle range and then fitted. When the former method is used, the polarizing film can be bonded to the extended polyethylene terephthalate film by roll-to-roll (Roll-t0-R0) ,, so that it is excellent in productivity and cost. . The thickness of the extended polyethylene terephthalate film used in the polarizing plate used in the present invention is preferably in the range of 15 to 75 μm, more preferably in the range of 2 to 6 Å. When the thickness of the extended polyethylene terephthalate film is less than 15, there is a tendency to be difficult to handle (poorly operability), and when the thickness exceeds 75 μηι, there is a tendency to become a thick film, so the cost The tendency to increase, and then the advantage of thinning, is weakened. The extended polyethylene terephthalate film obtained in the above manner can be easily obtained as a commercial product, and examples thereof include the following product names: "Diaf〇i丨", "Hostaphan", and "Fusi〇n" (above, Mitsubishi Plastics Co., Ltd. manufactures 'commodity name', 'Teijin Tetoron Film', 'Melinex', 'Mylar', 'Teflex' (above 'Dup〇nt Teijin Films Co., Ltd., trade name), "Toy〇b〇Eeter

Film」、「Toyobo Espet Film」、「Cosmoshine」、「Crisper」 (以上，東洋紡織股份有限公司製造，商品名）， Lumirror」（東麗薄膜加工（T〇ray Film Products)股份有限公司製造’商品名），「Emblon」、「Emblet」（Unitika股份有限公司製造，商品名），「Skyrol」（SKC公司製造，商品名），「Kofil」（高合（Kohap)股份有限公司製造，商品名），「SKC polyester film」（瑞通（SKC)股份有限公司製造’商品名）’以及「Taiko polyester film」（Futamura 151581.doc ·27· 201128268Film", "Toyobo Espet Film", "Cosmoshine", "Crisper" (above, manufactured by Toyobo Co., Ltd., trade name), Lumirror" (made by Toray Film Products Co., Ltd.) "Emblon", "Emblet" (manufactured by Unitika Co., Ltd., trade name), "Skyrol" (manufactured by SKC Corporation, trade name), "Kofil" (manufactured by Kohap Co., Ltd., trade name) , "SKC polyester film" ("trade name" manufactured by Ruitong (SKC) Co., Ltd." and "Taiko polyester film" (Futamura 151581.doc ·27· 201128268

Chemical股份有限公司製造，商品名）等。進而，只f礙本發明之效果，可於本發明中所使用 t延伸聚對本-甲旨膜之_面或兩面積層各種功能層。所積層之功能層例如可列舉：逡φ a 等冤層、平滑化層、易著層f。其中，由於該延伸聚對苯二曱酸乙二酿膜係經由接著劑層與偏光膜積層，因此較佳為積層有易接著層。構成易接著層之成分並無特別限定，例如可列舉.骨加中具有極性基、分子量相對較低且玻璃轉移溫度較低之^ 醋系樹脂、胺基甲酸醋系樹脂、或者丙烯酸系樹脂等。又，視需要可含有交聯劑、有機或無機填料、界面活性劑、以及潤滑劑等。於延伸聚對苯二甲酸乙二醋膜上形成上述導電層、平滑化層、易滑化層、抗結塊層、以及易接著層等功能層之方法並無特別限定，例如採用如下方法等：於所有延伸步驟已結束之膜上形成；於對聚對苯二甲酸乙二i系樹月旨進行延伸之步驟中’例如於縱向延伸與橫向延伸步驟之間形成；以及在與偏光獏接著之前或接著之後形成。例如，對於雙轴延伸之延伸聚對苯二f酸乙二醋膜，就生產性之觀點而言，較佳為採用對聚對苯二〒酸乙二醋系樹脂進行縱向延伸後形成上述功能層，繼而進行横向延伸之方法。 (光源側保護膜之接著） ^本發明中所使用之光入射側偏光板中，偏光膜與具有一于異向後之光源側保護膜通常經由接著劑而黏接。作為 l5J581.doc -28 - 201128268 =:，可考慮對各個膜之接著性，而自各種公知之接者劑專中選用任意者。較佳為使用透明且光學等向性之接著劑。作為具體之接著劑，例如可列舉：聚乙烯醇系接著劑笼丙稀酸系接著劑、胺基甲酸㈣接著劑、環氧系，\作為環氧轉著狀較_，可列舉含有脂環式環氧化α物之活性能量線硬化性組合物。又’更佳為使用無溶劑型之接著劑。藉由採用上述接著劑，存在如下優點，即可提高嚴酷環境下偏光板之耐久性，η並且無需將接著劑乾燥之步驟，因此可提高生產性。 (單元側保護膜或光學補償膜）本發明中所使用之光入射側偏光板亦可具備積層在偏光膜之與積層有上述具有光學異向性之光源側保護膜的面相反側之面之單元側保護膜或光學補償膜。早凡側保護膜或光學補償膜可根據目的而適宜使用具有作為光學膜之光學特性者，並無特別限^，作為單元側保濩膜，例如可使用由包含三乙醯纖維素（TAc)等之纖維素 :树月曰膜、烯烴系樹脂膜、丙烯酸系樹脂膜、聚碳酸酯系樹脂膜、以及聚酯系樹脂膜等透明樹脂膜所構成者。乍為光冬補彳員膜，具體可列舉：將上述透明樹脂膜延伸使具有折射率異向性者、調配有賦予光學異向性之添加劑者、以及於表面形成有光學異向性層者等。於光入射側偏光板中，當在偏光膜之液晶單元側積層有單元側保護膜時，亦可進而於該液晶單元側積層光學補償膜。 151581.doc •29- 201128268 又士下述般，亦可進而於該等單元側保護膜或光學補償膜上積層光學功能性膜，或者塗佈光學功能層。所謂纖維素系樹脂膜’係指包含纖維素之部分或完全酯化物的膜，例如可列舉包含纖維素之乙酸酯、丙酸酯、丁酸醋、以及該等之混合醋等的膜。其中，可較佳地使用三乙醯纖維素膜、二乙酿纖維素膜、乙酸丙酸纖維素膜、以及乙酸丁酸纖維素膜等。此種纖維素系樹脂膜可容易地獲得市售品，例如可列舉.「Fujuac TD」（Fuji Film股份有限公司製造，商品名）、以及「Konica Minolta TAC FUm Kc」（K〇nica Minolta Opto股份有限公司製造，商品名）等。所謂烯烴系樹脂膜’例如為包含使用聚合用觸媒將乙烯及丙烯等鏈狀烯烴單體、以及降冰片烯及其他環戊二烯衍生物等環狀烯烴單體聚合而獲得之樹脂的臈。作為包含鏈狀烯烴單體之烯烴系樹脂，可列舉聚乙烯或聚丙烯系樹脂。其中，較佳為包含丙烯之均聚物的聚丙烯系樹脂。又，以丙烯為主體，使可與其共聚之共聚單體以通常為1〜20重量％之比例、較佳為3〜1〇重量％之比例與該丙烯共聚合而獲得之聚丙烯系樹脂亦較佳。於使用包含丙烯共聚物之聚丙烯系樹脂之情形時，作為可與丙烯共聚之共聚單體，較佳為乙烯、丨_ 丁烯、以及^ 己烯。其中，就透明性或延伸加工性相對優異方面而言，較佳為使乙烯以3~10重量。/◦之比例共聚合而成者。藉由將乙稀之共聚合比例設定為1重量％以上，可顯現提高透明 151581.doc •30· 201128268 性或延伸加工性之效果。另一方面，若該比例超過2〇重量 %，則存在樹脂之熔點下降，要求單元側保護膜或光學補償膜所具備的耐熱性受損之情況。此種聚丙烯系樹脂可容易地獲得市售品，例如，分別可列舉：「Prime P〇lypro」份有限公司製造，商品名），「N〇Vatec」、「Wintec」（以上，Japan Polypropylene股份有限公司製造，商品名），「Sumit〇m〇 Noblen」（住友化學股份有限公司製造，商品名），以及「SunAllomer」（SunAllomer股份有限公司製造，商品名）等。 °° 將裒狀稀:》：工I合而成之稀煙系樹脂一般被稱為環狀（聚）烯烴系樹脂、脂環式（聚）烯烴系樹脂、或降冰片烯系樹脂。此處稱為環狀烯烴系樹脂。作為環狀烯烴系樹脂’例如可列舉：將由環戊二烯與婦烴類藉由狄爾斯-阿爾德反應所獲得之降冰片烯或其衍生物作為單體進行開環複分解聚合，繼而進行氫化，藉此獲得之樹脂；將由二環戊二烯與烯烴類或甲基丙烯酸酯類藉由狄爾斯-阿爾德反應所獲得之四環十二烯或其衍生物^ 為單體進行開環複分解聚合，繼而進行氫化，藉此獲得之樹脂；將降冰片烯 '四環十二烯、該等之衍生物類：其他環狀烯烴單體同樣地進行開環複分解共聚合，繼而進行氫化，藉此獲得之樹脂；以及藉由加成聚合使上述降冰片稀、四環十：稀、該等之衍生物及具有乙烯基之芳香族化合物等共聚合而獲得之樹脂等。 15158I.doc 201128268 此種環狀烯烴系樹脂可容易地獲得市售品，例如可列舉：「Topas」（Topas Advanced Polymers 如沾製造商品名），「Arton」（JSR股份有限公司製造，商品名），「ze〇n〇r」、「Ze〇nex」（以上，日本Ze〇n股份有限公司製造，商品名），以及「Apel」（三井化學股份有限公司製造，商品名）等。作為丙烯酸系樹脂膜之較佳具體例，可列舉包含甲美丙烯酸曱酯系樹脂之膜。所謂曱基丙烯酸曱酯系樹脂，係指含有50重量〇/〇以上曱基丙烯酸曱酯單元之聚合物。甲基丙烯酸曱酯單元之含量較佳為70重量。/。以上，亦可為1〇〇重量°/〇。曱基丙烯酸甲酯單元為1〇〇重量％之聚合物係單獨使甲基丙細酸曱Ϊ旨聚合而獲得之曱基丙烯酸甲醋均聚物。 6亥曱基丙稀酸曱酷系樹脂通常可藉由如下方式獲得.使以曱基丙烯酸甲酯為主成分之單官能單體及視需要使用之多官能單體於自由基聚合起始劑及視需要使用之鏈轉移劑之共存下聚合。作為可與甲基丙烯酸曱酯共聚之單官能單體，並無特別限定’例如可列舉：曱基丙烯酸乙酯、曱基丙烯酸丁醋、曱基丙烯酸環己酯、甲基丙烯酸笨酯、甲基丙烯酸节醋、曱基丙烯酸2-乙基己酯、以及甲基丙烯酸2-羥基乙酯等甲基丙烯酸曱酯以外之甲基丙烯酸酯類；丙烯酸甲酯、丙稀酸乙酯、丙烯酸丁酯、丙烯酸環己酯、丙烯酸苯酯、丙烯酸苄酯、丙烯酸2-己基己酯、以及丙烯酸2-羥基乙酯等丙烯酸酯類；2-(羥甲基）丙烯酸甲酯、3-(羥乙基）丙烯酸甲 151581.doc •32· 201128268 1曰2-(羥曱基）丙烯酸乙酯、以及2_(羥曱基）丙烯酸丁酯等羥基丙烯酸酯類；曱基丙烯酸及丙烯酸等不飽和酸類；氣 f乙烯及溴笨乙烯等鹵化苯乙烯類；乙烯基甲苯及α_曱基笨乙烯等取代苯乙烯類；丙烯腈及曱基丙烯腈等不飽和腈類，順丁烯二酸酐及檸康酸酐等不飽和酸酐類；以及苯基丨頁丁烯一醯亞胺及環己基順丁烯二醯亞胺等不飽和醯亞胺類等。該等單體可分別單獨使用，亦可與其他一種以上之單體組合使用。作為可與甲基丙烯酸甲酯共聚之多官能單體並無特別限疋，例如可列舉：乙二醇二（甲基）丙烯酸酯 '二乙二醇二（甲基）丙烯酸酯、三乙二醇二（甲基）丙烯酸酯、四乙二醇一（甲基）丙烯酸酯、九乙二醇二（甲基）丙烯酸酯、以及十四乙二醇二（甲基）丙烯酸酯等利用丙烯酸或曱基丙烯酸將乙二醇或其寡聚物之兩末端羥基酯化而成者；利用丙烯酉文或曱基丙烯酸將丙二醇或其募聚物之兩末端羥基酯化而成者，新戊二醇二（曱基）丙烯酸酯、己二醇二（甲基）丙烯西欠S曰以及丁一醇二（甲基）丙烯酸酯等利用丙烯酸或甲基丙烯酸將二元醇之羥基酯化而成者；利用丙烯酸或甲基丙烯酸將雙酚A、雙酚Α之環氧烷加成物、或該等之齒素取代物之兩末端羥基酯化而成者；利用丙烯酸或曱基丙烯酸將三羥曱基丙烷及季戊四醇等多元醇酯化而成者、以及該等之末端羥基上開環加成丙烯酸縮水甘油酯或甲基丙烯酸縮水甘油醋之環氧基而成者；於琥珀酸 '己二酸、對苯二甲酸、鄰苯二甲酸、該等之鹵素取代物等二元酸、以及該 15I58I.doc •33· 201128268 等之環氧烷加成物等上開環加成丙烯酸縮水甘油酯或甲基丙烯酸縮水甘油酯之環氧基而成者；（甲基）丙烯酸芳酯；以及二乙烯基苯等二芳基化合物等。其中，可較佳地使用乙二醇二曱基丙烯酸脂、四乙二醇二曱基丙烯酸脂、以及新戊二醇二甲基丙烯酸脂。甲基丙烯酸甲酯系樹脂亦可為藉由使該樹脂所具有之官能基彼此反應而進行改性之改性甲基丙烯酸曱酯系樹脂。作為該反應，例如可列舉：丙烯酸甲酯之甲酯基與2_(羥曱基）丙烯酸甲酯之羥基的高分子鏈内脫曱醇縮合反應、以及丙烯酸之羧基與2-(羥甲基）丙烯酸甲酯之羥基的高分子鏈内脫水縮合反應等》曱基丙烯酸甲酯系樹脂可容易地獲得市售品，例如，分別可列舉.「Sumipex」（住友化學股份有限公司製造，商品名）、「Acrypet」（三菱麗陽股份有限公司製造，商品名）、「Delpet」（旭化成股份有限公司製造，商品名）、「Parapet」（可樂麗（Kuraray)股份有限公司製造商。名）、以及「Acryviewa」（日本觸媒股份有限公司製造，商品名）等。構成聚碳酸酯系樹脂膜之聚碳酸酯系樹脂，通常為藉由界面聚縮合法、或者 '溶融S旨交換法使二元盼與二氣化山戈碳酸二苯酯類等碳酸酯前驅物反應而獲得者，一一知為使用雙酚A作為二元酚之芳香族聚碳酸酯樹脂。丨示此u外，亦可列舉藉由固相酯交換法使碳酸酯預聚物聚合 J取考、或者使環狀碳酸酯化合物開環聚合而成者等。 151581.doc •34· 201128268 、乍為—元紛’、要無損作為光學用透明樹脂之性能，則並無特別限定’例如除雙叫2,2_雙⑷經基苯基）丙烧）以外’可列舉：對苯二酚、間苯二酚、4,4，_二羥基聯苯、雙 (4_經基笨基）曱烧、雙.經基_3,5·二甲基）苯基}甲院、雙(4-羥基苯基)乙烷、！小雙(4羥基苯基)小苯基乙烷、ι，ι-雙（4-羥基苯基）環己烷、丨山雙…羥基苯基）_4•異丙基環己院、2,2-雙{(4_經基-3_甲基）笨基}丙烧、2,2•雙 {(4-¾基_3,5·二甲基）苯基}丙烷、2,2_雙忾4_羥基·3,5_二臭）笨基}丙院、2,2-雙（4-羥基苯基）丁烧、2,2-雙（4-羥基苯基）-3-曱基丁烷、2,4-雙（4-羥基苯基）-2-曱基丁烷、22·雙 (4-羥基苯基）戊烷' 2,2-雙（4-羥基苯基）_4-甲基戊烷、9,9_ 雙（4-羥基苯基）苐、9,9_雙{(4_羥基_3·甲基）苯基}苐、99_ 又{(4-羥基-3,5_二曱基）苯基}第、9,9_雙{(4羥基_3,5_二溴）苯基}苐、α，α·-雙（4_羥基苯基）_鄰二異丙基苯、α，α，-雙 (4-羥基苯基）間二異丙基苯、α，α，_雙（4_羥基苯基）對二異丙土笨4,4 - 一經基一苯基颯、4,4’-二經基二苯基_、以及 4,4'-二羥基二苯基醚等，該等二元酚可分別單獨使用，又’亦可與其他一種以上之二元酚混合使用。又，為將分子量調整至適當範圍、或者將高分子鏈之羥基末端封端，亦可併用一元酚化合物。作為該一元酚只要為發揮封端劑功能之化合物，則並無特別限定，例如可列舉：苯酚、4-第三丁基苯酚、以及丨·苯基_丨_(4•羥基苯基）丙燒等。又’視需要亦可將2-(2-羥基-3·第三丁基-5-(2-缓乙基）) 151581.doc •35- 201128268 苯基苯并三唑等具有uv吸收性之化合物用作封端劑。聚碳酸酯系樹脂可容易地獲得市售品，例如，分別可列舉.「Lexan」（SABIC Innovative Plastics公司製造，商孓名），「Makrolon」、「Apec」（以上，Bayer MaterialScience 公司製造’商品名）’「IUpil〇n」、r Novarex」（以上，三菱工塑膠（Mitsubishi Engineering-Plastics)股份有限公司製造，商品名），「Panlite」（帝人化成股份有限公司製造，商Manufactured by Chemical Co., Ltd., trade name), etc. Further, in the present invention, t can be used to extend the various functional layers of the surface of the film or the two layers of the film. Examples of the functional layer to be laminated include a tantalum layer such as 逡φ a, a smoothing layer, and an easy-to-use layer f. Among them, since the extended polyethylene terephthalate film is laminated with a polarizing film via an adhesive layer, it is preferred to laminate an easy-adhesion layer. The component constituting the easy-adhesion layer is not particularly limited, and examples thereof include a vinegar resin having a polar group, a relatively low molecular weight, and a low glass transition temperature, an amino carboxylic acid vine resin, or an acrylic resin. . Further, a crosslinking agent, an organic or inorganic filler, a surfactant, a lubricant, or the like may be contained as needed. The method of forming the conductive layer, the smoothing layer, the smoothing layer, the anti-caking layer, and the functional layer such as the easy-adhesion layer on the extended polyethylene terephthalate film is not particularly limited, and for example, the following method is employed. : formed on the film where all the stretching steps have been completed; in the step of extending the polyethylene terephthalate tree, for example, between the longitudinal stretching and the lateral stretching step; and in the case of polarizing Formed before or after. For example, for the biaxially extended extended poly(p-phenylene terephthalate) ethyl vinegar film, from the viewpoint of productivity, it is preferred to form the above function by longitudinally stretching the polyethylene terephthalate resin. The layer, followed by the method of lateral extension. (Subsequent to the light source side protective film) In the light incident side polarizing plate used in the present invention, the polarizing film and the light source side protective film having the opposite side are usually bonded via an adhesive. As l5J581.doc -28 - 201128268 =:, it is possible to consider the adhesion to each film, and select any one of various well-known connector agents. It is preferred to use a transparent and optically isotropic binder. Specific examples of the adhesive include a polyvinyl alcohol-based adhesive cage-acrylic-based adhesive, an aminocarboxylic acid (iv) adhesive, and an epoxy-based compound. An active energy ray-curable composition of an epoxidized alpha compound. Further, it is more preferable to use a solventless type of adhesive. By using the above-mentioned adhesive, there is an advantage that the durability of the polarizing plate in a severe environment can be improved, and the step of drying the adhesive without η can be improved, so that productivity can be improved. (Unit-side protective film or optical compensation film) The light-incident-side polarizing plate used in the present invention may have a surface laminated on the opposite side of the surface of the polarizing film on which the light-source side protective film having optical anisotropy is laminated. Unit side protective film or optical compensation film. The front side protective film or the optical compensation film may be suitably used as an optical film according to the purpose, and is not particularly limited as a unit side protective film, for example, it may be used by containing triacetyl cellulose (TAc). The cellulose is a transparent resin film such as a sapphire film, an olefin resin film, an acrylic resin film, a polycarbonate resin film, or a polyester resin film. Specifically, the transparent resin film is extended to have a refractive index anisotropy, an additive for imparting optical anisotropy, and an optical anisotropic layer formed on the surface. Wait. In the light incident side polarizing plate, when a unit side protective film is laminated on the liquid crystal cell side of the polarizing film, an optical compensation film may be further laminated on the liquid crystal cell side. 151581.doc • 29- 201128268 In addition, as described below, an optical functional film may be laminated on the unit side protective film or the optical compensation film, or an optical functional layer may be applied. The term "cellulose-based resin film" means a film containing a part or a complete ester of cellulose, and examples thereof include a cellulose acetate, a propionate, a butyric acid vinegar, and a mixed vinegar or the like. Among them, a triethylene glycol film, a diethyl cellulose film, a cellulose acetate propionate film, a cellulose acetate butyrate film, or the like can be preferably used. Such a cellulose-based resin film can be easily obtained as a commercially available product, and examples thereof include "Fujuac TD" (manufactured by Fuji Film Co., Ltd., trade name), and "Konica Minolta TAC FUm Kc" (K〇nica Minolta Opto Co., Ltd. manufacture, trade name) and so on. The olefin-based resin film ′ is, for example, a resin obtained by polymerizing a chain olefin monomer such as ethylene or propylene and a cyclic olefin monomer such as norbornene or another cyclopentadiene derivative using a catalyst for polymerization. . Examples of the olefin-based resin containing a chain olefin monomer include polyethylene or a polypropylene resin. Among them, a polypropylene-based resin containing a homopolymer of propylene is preferred. Further, a polypropylene resin obtained by copolymerizing a propylene monomer copolymerizable with propylene at a ratio of usually 1 to 20% by weight, preferably 3 to 1% by weight, based on propylene, is also used. Preferably. In the case of using a polypropylene-based resin containing a propylene copolymer, as a comonomer copolymerizable with propylene, ethylene, ruthenium-butene, and hexene are preferable. Among them, in terms of transparency or elongation workability, it is preferred to make ethylene 3 to 10 by weight. The proportion of /◦ is aggregated. By setting the copolymerization ratio of ethylene to 1% by weight or more, it is possible to exhibit an effect of improving the transparency or the processability of the transparent 151581.doc • 30· 201128268. On the other hand, when the ratio exceeds 2% by weight, the melting point of the resin may be lowered, and the heat resistance of the unit side protective film or the optical compensation film may be impaired. Commercially available products can be easily obtained from such a polypropylene-based resin. For example, "Prime P〇lypro" Co., Ltd., trade name), "N〇Vatec", "Wintec" (above, Japan Polypropylene) "Manufactured by the company, trade name", "Sumit〇m〇Noblen" (manufactured by Sumitomo Chemical Co., Ltd., trade name), and "SunAllomer" (manufactured by SunAllomer Co., Ltd., trade name). °° The thin-type resin which is formed by the smelting of the sputum is generally referred to as a cyclic (poly) olefin resin, an alicyclic (poly) olefin resin, or a norbornene resin. This is called a cyclic olefin resin. Examples of the cyclic olefin-based resin include ring-opening metathesis polymerization of norbornene or a derivative thereof obtained by reacting cyclopentadiene and a hydrocarbon with a Diels-Alder reaction as a monomer, followed by performing a ring-opening metathesis polymerization. Hydrogenation, a resin obtained therefrom; tetracyclododecene or a derivative thereof obtained by disulfide-diene and olefin or methacrylate by Diels-Alder reaction a cyclic metathesis polymerization followed by hydrogenation to obtain a resin; a norbornene 'tetracyclododecene, the derivatives: the other cyclic olefin monomers are subjected to ring-opening metathesis copolymerization, followed by hydrogenation The resin obtained thereby, and a resin obtained by copolymerization of the above-mentioned norbornene, tetracyclic, dilute, such derivatives, and an aromatic compound having a vinyl group by addition polymerization. 15158I.doc 201128268 Such a cyclic olefin-based resin can be easily obtained as a commercial product, and examples thereof include "Topas" (Topas Advanced Polymers, such as a product name), and "Arton" (manufactured by JSR Co., Ltd., trade name). , "ze〇n〇r", "Ze〇nex" (above, manufactured by Zezen Co., Ltd., Japan), and "Apel" (manufactured by Mitsui Chemicals, Inc., trade name). A preferred example of the acrylic resin film is a film comprising a methacrylate resin. The decyl methacrylate-based resin refers to a polymer containing 50% by weight of hydrazine-based decyl acrylate unit. The content of the methacrylate unit is preferably 70% by weight. /. The above may also be 1 〇〇 weight / 〇. The methyl methacrylate unit is a fluorenyl methacrylate homopolymer obtained by polymerizing a polymer of 1% by weight of methyl propyl acrylate. 6 曱曱丙丙丙曱通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常通常And polymerization in the coexistence of a chain transfer agent as needed. The monofunctional monomer copolymerizable with the oxime methacrylate is not particularly limited, and examples thereof include ethyl methacrylate, butyl acrylate acrylate, cyclohexyl methacrylate, and methacrylate. Methyl acrylates other than methacrylate methacrylate, 2-ethylhexyl methacrylate, and 2-hydroxyethyl methacrylate; methyl acrylate, ethyl acrylate, butyl acrylate Ester, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, 2-hexyl hexyl acrylate, and 2-hydroxyethyl acrylate; acrylates such as 2-(hydroxymethyl) acrylate, 3-(hydroxyl) Acrylic acid 151581.doc •32· 201128268 1曰2-(hydroxyindenyl)ethyl acrylate, and hydroxy acrylate such as 2-(hydroxyindole) butyl acrylate; unsaturated acids such as methacrylic acid and acrylic acid; Halogenated styrenes such as ethylene f and ethylene bromide; substituted styrenes such as vinyl toluene and α-mercapto ethylene; unsaturated nitriles such as acrylonitrile and mercapto acrylonitrile, maleic anhydride and citrine An unsaturated acid anhydride such as an acid anhydride; Shu Page a phenyl-butene (PEI) and cyclohexyl maleic unsaturated acyl imine (PEI) and the like. These monomers may be used singly or in combination with one or more other monomers. The polyfunctional monomer copolymerizable with methyl methacrylate is not particularly limited, and examples thereof include ethylene glycol di(meth)acrylate diethylene glycol di(meth)acrylate and triethylene glycol. Alcohol di(meth)acrylate, tetraethylene glycol mono(meth)acrylate, nonaethylene glycol di(meth)acrylate, and tetradecylethylene di(meth)acrylate, etc. a method in which a mercaptoacrylic acid esterifies a hydroxyl group at both terminals of ethylene glycol or an oligomer thereof; and esterification of a terminal hydroxyl group of propylene glycol or a polymer thereof by using propylene or methacrylic acid, neopenta Alcohol bis(indenyl) acrylate, hexanediol di(meth) propylene oxime S 曰 and butyl diol di(meth) acrylate are esterified with hydroxy group of diol by acrylic acid or methacrylic acid. The use of acrylic acid or methacrylic acid to esterify bisphenol A, an alkylene oxide adduct of bisphenolphthalein, or a hydroxyl group at both ends of the dentate substitution; using acrylic or methacrylic acid An esterification of a polyhydric alcohol such as hydroxymercaptopropane or pentaerythritol, And the terminal hydroxyl groups of the terminal hydroxyl groups are added to form an epoxy group of glycidyl acrylate or glycidyl methacrylate; in succinic acid 'adipic acid, terephthalic acid, phthalic acid, these a dibasic acid such as a halogen-substituted product, and an epoxy group-added product such as 15I58I.doc •33·201128268, etc., which is obtained by ring-opening addition of an epoxy group of glycidyl acrylate or glycidyl methacrylate. ; (meth)acrylic acid aryl ester; and diaryl compounds such as divinylbenzene. Among them, ethylene glycol dimercapto acrylate, tetraethylene glycol dimercapto acrylate, and neopentyl glycol dimethacrylate can be preferably used. The methyl methacrylate-based resin may be a modified methacrylate-based resin which is modified by reacting the functional groups of the resin with each other. Examples of the reaction include a polymer chain in-situ decoupling reaction of a methyl ester group of methyl acrylate with a hydroxyl group of methyl 2-(hydroxyindole) acrylate, and a carboxyl group and 2-(hydroxymethyl) group of acrylic acid. "Molecular chain dehydration condensation reaction of a hydroxyl group of methyl acrylate, etc." A commercially available product can be easily obtained by using a methyl methacrylate-based resin, for example, "Sumipex" (manufactured by Sumitomo Chemical Co., Ltd., trade name) "Acrypet" (manufactured by Mitsubishi Rayon Co., Ltd., trade name), "Delpet" (manufactured by Asahi Kasei Co., Ltd., trade name), "Parapet" (manufacturer of Kuraray Co., Ltd.), and "Acryviewa" (manufactured by Nippon Shokubai Co., Ltd., trade name). The polycarbonate-based resin constituting the polycarbonate-based resin film is usually a carbonate precursor such as a binary polyfluoride or a divaporated diphenyl ester of diphenyl carbonate by an interfacial polycondensation method or a "smelting S exchange method". The one obtained by the reaction is known to use bisphenol A as an aromatic polycarbonate resin of a dihydric phenol. Further, in addition to the above, the carbonate prepolymer may be polymerized by a solid phase transesterification method, or a cyclic carbonate compound may be subjected to ring-opening polymerization. 151581.doc •34· 201128268 乍 — 元元、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、、 'Can be enumerated: hydroquinone, resorcinol, 4,4,-dihydroxybiphenyl, bis(4_pyridyl) calcined, bis-trans-based 3,5-dimethyl)benzene Base} Jiayuan, bis(4-hydroxyphenyl)ethane,! Small bis(4-hydroxyphenyl)succinylethane, iota, ι-bis(4-hydroxyphenyl)cyclohexane, 丨山双...hydroxyphenyl)_4•isopropylcyclohexyl, 2,2 - double {(4_ mercapto-3_methyl) phenyl}propane, 2,2•double {(4-3⁄4 yl), 3,5 dimethyl) phenyl}propane, 2,2_double忾4_hydroxy·3,5_二臭) Stupid}Binyuan, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)-3-indenyl Butane, 2,4-bis(4-hydroxyphenyl)-2-mercaptobutane, 22·bis(4-hydroxyphenyl)pentane' 2,2-bis(4-hydroxyphenyl)_4- Methylpentane, 9,9-bis(4-hydroxyphenyl)fluorene, 9,9-bis{(4-hydroxy-3-methyl)phenyl}fluorene, 99_ again {(4-hydroxy-3,5) _Dimercapto)phenyl}, 9,9_bis{(4hydroxy-3,5-dibromo)phenyl}indole, α,α·-bis(4-hydroxyphenyl)-o-diisopropyl Benzene, α,α,-bis(4-hydroxyphenyl)m-diisopropylbenzene, α,α,_bis(4-hydroxyphenyl)-p-isopropylidene 4,4-mono-phenyl-benzene Base, 4,4'-di-diphenyldiphenyl, and 4,4'-dihydroxydiphenyl ether, etc., these dihydric phenols can be used separately, and can also be combined with one or more Phenol mixed. Further, in order to adjust the molecular weight to an appropriate range or to terminate the hydroxyl end of the polymer chain, a monohydric phenol compound may be used in combination. The monohydric phenol is not particularly limited as long as it functions as a terminal blocking agent, and examples thereof include phenol, 4-tert-butylphenol, and fluorenyl-phenyl-indole-(4-hydroxyphenyl)propane. Burn and so on. And 'optionally 2-(2-hydroxy-3.t-butyl-5-(2-retinoethyl)) 151581.doc •35- 201128268 phenylbenzotriazole and the like have uv absorption The compound is used as a blocking agent. Commercially available products can be easily obtained from the polycarbonate resin. For example, "Lexan" (manufactured by SABIC Innovative Plastics Co., Ltd.), "Makrolon", "Apec" (above, manufactured by Bayer MaterialScience) Name) '"IUpil〇n", r Novarex" (above, manufactured by Mitsubishi Engineering-Plastics Co., Ltd., trade name), "Panlite" (manufactured by Teijin Chemical Co., Ltd.,

°σ 名），「Calibre」（Dow Chemical 公司製造），r SD°σ), "Calibre" (manufactured by Dow Chemical), r SD

Polyca」（Sumitomo Dow股份有限公司製造，商品名），以及「Tarfl〇n」（出光興產（Idemitsu Kosan)股份有限公司製造，商品名）等。作為將以上述方式所獲得之烯烴系樹脂、環狀烯烴系樹脂、甲基丙烯酸甲酯系樹脂、以及聚碳酸酯系樹脂等形成於單元側保護膜上的方法，只要適宜選擇對應於該樹脂之方去即可，並無特別限定。例如採用如下之方法：使溶解於溶劑中之樹脂沿著金屬帶或滾筒流鑄，然後將溶劑乾燥除去而獲得膜之溶劑澆鑄法；以及將樹脂加熱至其熔融溫度以上並進行混練，然後自模具中擠出，進行冷卻，藉此獲得膜之熔融擠出法。其中，就生產性之觀點而言較佳為採用炫融擠出法。又’可用作單元側保護膜之包含上述樹脂之膜可容易地獲得市售品，例如，作為聚丙稀系樹脂膜，分別可列舉：「「FILMAX CPP FILM」（FILMAX公司製造商品名）、「Suntox」（Sun.T〇x股份有限公司製造商品名）、 151581.doc •36· 201128268 厂厂Polyca (manufactured by Sumitomo Dow Co., Ltd., trade name), and "Tarfl〇n" (manufactured by Idemitsu Kosan Co., Ltd., trade name). The method of forming the olefin resin, the cyclic olefin resin, the methyl methacrylate resin, the polycarbonate resin, or the like obtained in the above manner on the unit side protective film, as long as it is suitably selected corresponding to the resin It is only necessary to go there, and there is no particular limitation. For example, a method in which a resin dissolved in a solvent is cast along a metal belt or a drum, and then the solvent is dried and removed to obtain a solvent casting method of the film; and the resin is heated to a temperature above the melting temperature and kneaded, and then The mold was extruded and cooled, whereby a melt extrusion method of the film was obtained. Among them, from the viewpoint of productivity, it is preferred to employ a smelting extrusion method. Further, a commercially available product can be easily obtained as a film containing the above-mentioned resin as a unit side protective film. For example, as a polypropylene resin film, "FILMAX CPP FILM" (trade name manufactured by FILMAX Co., Ltd.), "Suntox" (trade name manufactured by Sun.T〇x Co., Ltd.), 151581.doc •36· 201128268 Factory

Tohcello」（Tohcello股份有限公司 ToyoboPylenFilm」（東洋紡織股份有製造，商品名）、限公司製造，商品名）、1 Torayfan 从W方哏公司製造，冏Λ 名）、「Nippon P〇lyaCe」（Nipp〇n㈧^“股份有限公司製造，商品名）、以及「Taik0 Fc」（Futamura 股份有限公司製造，商品名）等。 -一…、 j y-j ^ ： zeonorTohcello" (ToyoboPylenFilm, Tohcello Co., Ltd., manufactured by Toyobo Co., Ltd., manufactured by Co., Ltd., trade name), 1 Torayfan, manufactured by W., Ltd., "Nippon P〇lyaCe" (Nipp) 〇n (8)^ "Manufactured by Co., Ltd., trade name", and "Taik0 Fc" (manufactured by Futamura Co., Ltd., trade name). - one..., j y-j ^ : zeonor

Film」（Optes股份有限公司製造，芮σ 衣以冏00名）、以及「ArtonFilm" (manufactured by Optes Co., Ltd., 芮σ 冏冏 00), and "Arton

Film」（JSR股份有限公司製造，商品名）等。又，例如作為曱基丙烯酸曱酯系樹脂膜，可列舉：「Sumipex」（住友化學股份有限公司製造商品名），「Acrynte」'「Acryplen」（以上，三菱麗陽股份有限公司製造，商品名）’「Delaglas」（旭化成股份有限公司製造，商品名）’「ParaglaS」、「Cc)m()glas」（以上，可樂麗股份有限公司製造’商品名），以及「Acryviewa」（日本觸媒股份有限公司製造，商品名）等。又，例如作為聚碳酸酯系樹脂膜，可列舉：「[以扣Film" (manufactured by JSR Co., Ltd., trade name). In addition, for example, "Sumipex" (manufactured by Sumitomo Chemical Co., Ltd.), "Acrynte" and "Acryplen" (above, manufactured by Mitsubishi Rayon Co., Ltd., trade name) ) "Delaglas" (manufactured by Asahi Kasei Co., Ltd., "product name") "ParaglaS", "Cc)m () glas" (above, manufactured by Kuraray Co., Ltd.), and "Acryviewa" (Japanese catalyst) Manufacturing company, trade name), etc. Further, for example, as the polycarbonate resin film, "[

Film」（SABIC Innovative Plastics公司製造，商品名），「Makr〇f〇l」、「Bayfol」（以上，Bayer心㈣似仏㈣公司製造，商品名），「Iupil〇n Sheet」（三菱工程塑膠股份有限公司製造，商品名）’以及rPanHte Sheet」（帝人化成股份有限公司製造，商品名）等。又’作為用作偏光膜上之設置在與積層具有光學異向性之光源側保護膜之側相反側的單元側保護膜之聚酯系樹脂 I51581.doc •37- 201128268 膜’可使用與構成上述作為 “_ μ马具有先學異向性之光源側保護膜而例不之延伸聚對苯二乙一曰膜的聚酯系樹脂（聚一-乙二酯系樹脂）同種者。於此情形樹脂膜可使用未延伸者，例如 3系出而獲得之膜。了直接使用藉由上述溶融擠可用作單元側保護膜之未延伸之聚s旨系樹脂膜可容易地獲付市售品，例如可列舉：「N〇vaclear」(三菱化學股份有限公司製造’商品名）、以及「帝人A视H (帝人化成股份有限公司製造，商品名）等。斤又’作為包含纖維素系樹脂膜之光學補償膜，只要具有符。目的之折射率特性，則並無特別限定，例如可列舉：將上述所列舉之纖維素㈣脂膜單轴或雙軸延伸而獲得之膜、或者使纖維素系樹脂膜等含有具有相位差調整功能之化合物而成之膜、於纖維素系樹脂膜表面塗佈具有相位差調整功此之化合物而成之膜、以及進而使該等膜單轴或雙軸延伸而獲得之膜等。包含纖維素系樹脂膜之光學補償膜可容易地獲得市售时’例如可列舉：「Fujitac WV」（Fuji Film股份有限公司製造’商品名）、以及 r K〇nica Minolta TAC Film KC8UCR」（Konica Minolta Opto股份有限公司製造，商品名）等。又’於將上述作為單元側保護膜而例示之烯烴系樹脂膜、丙烯酸系樹脂膜' 聚碳酸酯系樹脂膜及聚酯系樹脂膜等用作光學補償膜時’通常藉由對該未延伸膜進行延伸， 151581.doc 08- 201128268 使膜具有折射率異向性伸方法係根據所需折射：里膜用作光學補償m。延定，ϋ堂p 射率異向性而選擇者，並盔特疋通μ采用縱向單轴延伸， …、特別限逐次雙輛延伸。、。早車ι伸，以及縱、橫通吊經縱向單軸延伸之膜1右性。此處，η膜八有nX>ny=nz之折射率異〜為膜之延伸方向之折射向之折射率，nAM y為膜之寬度方、 Πζ為獏之法線方向之折射率。通¥ ’經橫向單轴延伸之胺目士異向性。早釉延伸之膜具有1Wu折射率 > ηζ之折射率又，通常，經逐次異向性雙軸延伸之膜具有ηχ>η 人於2賦予所期望之折射率特性’亦可將熱收縮性膜貼 — 1更膜收縮來代替延伸加卫’或者行延伸加工—面传腺你給進 ®便膜收I®。通常，進行該择 Μ M b ^ 疋订成絲作之目的在於斤射率異向性成為> 膜。 ny^nz>nx2ny之光學補償關於έ亥等光學補償膜，於蔣厘^ a 用1負朕於將谷度设定為d之情形時，面内相位差值R0可表示為（n n )xd _ y；与度方向之相位差值Rth 可表示為[(nx+ny)/2_nz]xd。光學補償膜可容易地獲得市售品，例如作為包含環狀聚烯烴系樹脂之光學補償膜’可列舉：「“。r (〇ptes股份有限公司製造，商品名）、「Art〇n Fiim」（徽股份有限公司製造’商品名）、「S_SINA —on Fijm」 (積水化學工業股份有限公司製造，商品名）、以及 151581.doc •39· 201128268 「Pureace ER」（帝人化成股份有限公司製造，商品名）等。又，作為包含聚碳酸酯系樹脂之光學補償膜，例如可列舉「Pureace WR」（帝人化成股份有限公司製造）等。 (單元側保護膜或光學補償膜之接著）於本發明中所使用之光入射側偏光板中，偏光膜與上述單元側保護膜或光學補償膜通常係經由接著劑而黏接。作為該接著劑，可考慮對各膜之接著性，而自各種公知之接著劑等中選用任意者。較佳為使用透明且光學等向性之接著劑。作為具體之接著劑，例如可列舉：聚乙烯醇系接著劑、丙烯酸系接著劑、胺基甲酸酯系接著劑、環氧系接著劑等。作為環氧系接著劑之較佳例，可列舉含有脂環式環氧化合物之活性能量線硬化性組合物。又，更佳為使用無溶劑型之接著劑。藉由採用上述接著劑，可提高嚴酷之環境下偏光板之耐久性，並且無需將接著劑乾燥之步驟，因此存在無需乾燥設備，可提高生產性之優點。又，作為用於偏光膜與單元側保護膜或光學補償膜之接著的接著劑，若使用與上述偏光膜與具有光學異向性之光源側保護膜之接著中所使用的接著劑相同之接著劑，則接著劑僅用一種即可，故步驟變得簡便。進而，於兩者之接著劑為活性能量線硬化性組合物之情形時’藉由於製造偏光板時連續照射活性能量線，可在進行光源側保護膜之接著的同時，進行單元側保護膜或光學補償膜之接著，因此有生產性提高之優點。 151581.doc -40- 201128268 又，亦可使用水系之接著劑。作為可成為該水系劑之接著劑成分，例如可列舉水溶性之交聯性環氧脂、以及胺基甲酸酯系樹脂等。 (黏著劑層）本發明中所使用之光入射側偏光板可於單元側保護膜或光學補償膜之液晶單元側（單元側保護膜或光學補償膜之與積層偏光膜之面相反側之面）具有黏著劑層。此種黏著劑層可用於與液晶單元之貼合。構成黏著劑層之黏著劑只要滿足可用於光學膜之各種特性（透明性、财久性、二次加工性等），則並無特別限定；例如可使用含有丙烯酸系樹脂與交聯劑之丙烯酸系黏著劑，上述丙烯酸系樹脂係以（曱基）丙烯酸酯作為主成分，進而使少量之含有具有官能基之（甲基）丙烯酸單體的两烯酸系單體組合物於聚合起始劑之存在下自由基聚合而成的玻璃轉移溫度（Tg)為0。(：以下之丙烯酸系樹脂。此處，成為丙烯酸系樹脂之主成分之（甲基）丙烯酸酯可以下述式表示： CH2=C(R1)COOR2 式中，R〗表示氫原子或甲基’ R2表示碳數為丨〜14之燒基、或芳烧基，R2之烷基之氫原子、或芳烷基之氫原子可經碳數為1〜10之烷氧基取代。又’具有官能基之（曱基）丙烯酸單體係分子内含有經基、羧基、胺基、環氧基等極性官能基與一個稀烴性雙鍵 (通常為（曱基）丙烯醯基）之單體。 151581.doc 201128268 作為成為丙烯酸系樹脂之主成分的（甲基）丙烯酸酯之具體例’例如可列舉：Rl*H且R2為正丁基之丙烯酸丁酯、或者R丨為Η且R_2為2-乙基己基之丙烯酸2-乙基己酯等。又’關於具有官能基之（甲基）丙烯酸單體之具體例，例如作為具有羥基之（甲基）丙烯酸單體，可列舉（曱基）丙稀酸 2笔基乙g曰’作為具有缓基之（曱基）丙稀酸單體，可列舉丙烯酸等。進而’於製造該丙烯酸系樹脂時，亦可使少量之分子内具有複數個（曱基）丙烯醯基之單體共聚合，作為該例，可列舉1，4_丁二醇二（甲基）丙烯酸酯等。於製造丙烯酸系樹脂時，上述（甲基）丙烯酸酯及具有官能基之（甲基）丙烯酸單體分別可僅使用一種，亦可併用複數種。又，亦可組合複數種作為（甲基）丙烯酸酯與具有官能基之（曱基）丙烯酸單體之共聚物的丙烯酸系樹脂，或者於該共聚物即丙烯酸系樹脂中調配其他丙烯酸系樹脂、例如包含不具有官能基之（曱基）丙烯酸單體之均聚物或共聚物的丙烯酸系樹脂’而形成丙烯酸系樹脂組合物，並將其用作黏著劑之樹脂成分。於丙烯酸系黏著劑中所調配之交聯劑可為異氰酸酯系化合物、環氧系化合物、金屬螯合物系化合物、氮丙啶系化合物等。異氰酸酯系化合物除分子内具有至少2個異氰酸基（-NCO)之化合物本身以外，亦可使用使該化合物與多元醇等反應而成之加成物、其二聚物、三聚物等形態。關於交聯劑之具體例，作為二異氰酸酯系化合物，可列舉丨，6_ 己一異氰酸醋之二經甲基丙烧加成物、甲苯二異氰酸酯之 151581.doc • 42· 201128268 三經甲基丙烧加成物等，且各個二異氛酸酿系化合物多使用溶解於乙酸乙醋等有機溶劑中而成之溶液。該等交聯劑可分別單獨使s，亦可與其他一種以±之交聯劑組合使用。丙烯酸系黏著劑中所含有之丙烯酸系樹脂之重量平均分子量，以利用凝膠滲透層析法（GPC)之標準聚笨乙烯換算計，通常為60萬〜200萬左右，較佳為80萬〜18〇萬。若重量平均分子量未達6G萬’則有黏著性或耐久性下降之情形。又，若重量平均分子量超過鳩萬，則有黏著劑層變得過硬，，黏著後變得難以剝離，或者對所貼合之單元側保護膜或光學補償膜賦予不合適之應力雙折射的情形。藉由將上述丙烯酸系樹脂溶解於乙酸乙酯等有機溶劑中，進而添加交聯劑，可獲得丙稀酸系黏著劑溶液。又，視需要可含有⑦烧偶合劑、财候穩定劑、增黏劑、塑化劑、軟化劑、顏料及無機填料中之一種或兩種以上，進而可含有有機珠粒等光擴散性微粒子。以上述方式所獲得之丙烯酸系黏著劑溶液通常係塗佈於 =離膜上’於60〜12〇t下加熱〇5〜1〇分鐘左右後館去有機溶劑’而形成黏著劑層。繼而，於該黏著劑層上貼合上述單元側保護膜或光學補償膜後，例如於溫度23t、濕度65%之環境下熟化5〜“曰左右’使交聯劑（C)充分反應。又，亦可於在剝離膜上形成黏著劑層後，進而貼合剝離膜’獲得未受保護膜等基材支撐之黏著劑層單獨片材。於 151581.doc • 43- 201128268 此情形時，亦於貼合剝離膜後，例如於溫度23t：、濕度 65%之環衩下熟化5〜2〇日左右，使交聯劑（c)充分反應。此種黏著劑單獨片材係於單元側保護膜或光學補償膜之製造中，在必要時剝冑一側之_膜並貼合於單元側保護膜或光學補償膜而使用。如上所述之丙烯酸系黏著劑之原料可容易地獲得市售品，例如可列| :各種丙_單體（日本觸媒股份有限公司製造、東亞合成股份有限公司製造），作為聚合起始劑之2,2 -偶氮雙異丁腈等（大塚科學股份有限公司製造、 Japan Finechem股份有限公司製造），作為交聯劑之丨6己 -異氰ISa及其—經甲基丙烧力π成物、甲笨二異氰酸醋及其三經曱基丙院加成物等（Mitsui Chemieals pGlyurethanes 股份有限公司製造、Sumika Bayer Urethane股份有限公司製造）。又’黏著劑片材亦有市售品，例如可列舉「無基材黏著劑膜·片材」（Lintec股份有限公司製造、日東電工股份有限公司製造）。 <光出射側偏光板> 於本發明之液晶顯示裝置中，液晶單元之光出射側所使用之偏光板（光出射側偏光板40)可為先前公知之偏光板，亦可為與光入射側偏光板相同構成之偏光板，即在偏光膜之與液晶單元相反側具備具有光學異向性之保護膜的偏光板。於光出射側偏光板40採用與光入射側相同之偏光板之情形時，該偏光板較佳為於具有光學異向性之保護膜42之 15158I.doc -44 · 201128268 光出射側之面（與積層有偏光膜41之面相反之面）具備選自防眩層、硬塗層、抗反射層、以及抗靜電層中之至少一種功能層。於此情形時，配置於液晶顯示裝置之光入射側之偏光板（光入射側偏光板）亦為本發明所規定之偏光板。〈液晶單元> 將上述附帶黏著劑層之偏光板經由該黏著劑層貼合於液晶單元之一面或兩面，藉此可獲得液晶面板。液晶單元係為了切換透射光量，而將液晶封入2塊透明基板之間，而具有藉由施加電壓使液晶之配向狀態變化之功能的構件，且根據其中所封入之液晶層之配向狀態與對電極間施加電壓時之液晶層之配向狀態，例如有扭轉向列（TN， Nematic)模式或垂直配向（VA，Vertical AHgnment)模式、橫向電場切換（IPS，In-Plane Switching)模式等各種方式者。於本發明中，可使用廣泛地用於一般液晶顯示裝置之各種模式的液晶單元。積層於偏光膜之液晶單元側之單元側保護膜或光學補償膜的性能可根據上述液晶單元之擇。單元之運作模式或特性而適宜選 <背光源> 本發明之液晶顯示裝置具備配置於液晶Film" (made by SABIC Innovative Plastics, trade name), "Makr〇f〇l", "Bayfol" (above, Bayer heart (four) like 仏 (4) company made, trade name), "Iupil〇n Sheet" (Mitsubishi engineering plastics (manufactured by the company, trade name) 'and rPanHte Sheet' (manufactured by Teijin Chemical Co., Ltd., trade name). Further, as the polyester-based resin used as the unit-side protective film on the side opposite to the side of the light source side protective film having optical anisotropy on the polarizing film, I51581.doc •37-201128268 The film can be used and constructed. The above-mentioned polyester-based resin (poly-ethylenediester-based resin) which is a kind of "meth"-side protective film which has a light source side protective film which is a priori anisotropy and which does not extend the polyethylene terephthalate film. As the resin film, a film obtained by a non-extension, for example, a system can be used. The commercially available product can be easily obtained by directly using the unstretched polysole resin film which can be used as the unit side protective film by the above-described melt extrusion. For example, "N〇vaclear" (manufactured by Mitsubishi Chemical Corporation, Ltd.), and "Emperor A-view H (manufactured by Teijin Chemical Co., Ltd., trade name)), etc. The optical compensation film of the film is not particularly limited as long as it has a refractive index characteristic, and examples thereof include a film obtained by stretching the above-mentioned cellulose (tetra) lipid film uniaxially or biaxially, or a fiber. a film comprising a compound having a phase difference adjustment function, such as a resin film, a film having a phase difference adjustment function applied to the surface of the cellulose resin film, and further uniaxial or biaxially A film obtained by stretching and the like. The optical compensation film containing a cellulose resin film can be easily obtained at the time of commercial use, for example, "Fujitac WV" (trade name manufactured by Fuji Film Co., Ltd.), and r K〇nica Minolta TAC Film KC8UCR" (manufactured by Konica Minolta Opto Co., Ltd., trade name). In the case where the olefin resin film, the acrylic resin film', the polycarbonate resin film, the polyester resin film, and the like which are exemplified as the unit side protective film are used as the optical compensation film, 'the The film is stretched, 151581.doc 08- 201128268 The film has a refractive index anisotropic stretching method according to the desired refraction: the inner film is used as optical compensation m. It is decided that the ϋ p p 射异异选择选择选择选择 p p p p p p p p p p p 采用采用采用采用采用采用采用采用采用采用采用采用采用采用采用采用采用,. The morning car is stretched, and the film 1 is longitudinally and horizontally traversed by the longitudinal uniaxial extension. Here, the refractive index of the η film 八 has nX > ny = nz is the refractive index of the direction in which the film extends, nAM y is the width of the film, and Πζ is the refractive index of the normal direction of the 貘. By ¥ ′ Amine unidirectionally extended by an azimuth. The film of the early glaze extension has a refractive index of 1 Wu > the refractive index of η 又. In general, the film which is subjected to the cyclic anisotropic biaxial stretching has η χ > η which gives the desired refractive index characteristic to 2 ' can also be heat shrinkable. Membrane Sticker - 1 more membrane shrinkage instead of extension and extension 'or line extension processing - face transfer gland you give into the film to receive I®. Usually, the purpose of the selection of M b ^ 疋成成成在于在于在于在于在于在于在于异 & & & & & & 异 & 异异异异。。。 Ny^nz>nx2ny optical compensation for the optical compensation film such as έhai, when the case is set to d, the intra-plane phase difference R0 can be expressed as (nn)xd. _ y; The phase difference Rth from the direction of the degree can be expressed as [(nx+ny)/2_nz]xd. A commercially available product can be easily obtained as an optical compensation film. For example, an optical compensation film containing a cyclic polyolefin resin is exemplified as "". r (manufactured by 〇ptes Co., Ltd., trade name), "Art〇n Fiim" (manufactured by Emblem Co., Ltd.), "S_SINA-on Fijm" (manufactured by Sekisui Chemical Co., Ltd., trade name), and 151581.doc •39· 201128268 “Pureace ER” (manufactured by Teijin Chemicals Co., Ltd., trade name). In addition, examples of the optical compensation film containing a polycarbonate resin include "Pureace WR" (manufactured by Teijin Chemicals Co., Ltd.). (Subsequent to the unit side protective film or the optical compensation film) In the light incident side polarizing plate used in the present invention, the polarizing film and the unit side protective film or the optical compensation film are usually bonded via an adhesive. As the adhesive, any of various known adhesives and the like can be selected in consideration of the adhesion to each film. It is preferred to use a transparent and optically isotropic binder. Specific examples of the adhesive include a polyvinyl alcohol-based adhesive, an acrylic adhesive, a urethane-based adhesive, and an epoxy-based adhesive. Preferred examples of the epoxy-based adhesive include an active energy ray-curable composition containing an alicyclic epoxy compound. Further, it is more preferred to use a solventless type of adhesive. By using the above-mentioned adhesive, the durability of the polarizing plate in a severe environment can be improved, and the step of drying the binder is not required, so that there is no need for drying equipment, and the productivity can be improved. Further, as an adhesive for the polarizing film and the unit side protective film or the optical compensation film, the same adhesive as that used in the subsequent step of the polarizing film and the light source side protective film having optical anisotropy is used. For the agent, only one kind of the adhesive can be used, so the step becomes simple. Further, when the adhesive agent of the both is an active energy ray-curable composition, the unit side protective film or the unit side protective film can be performed while the light source side protective film is continuously irradiated by continuously irradiating the active energy ray when the polarizing plate is manufactured. The optical compensation film is followed by an advantage of productivity improvement. 151581.doc -40- 201128268 Also, a water-based adhesive can be used. Examples of the binder component which can be used as the water-based agent include water-soluble crosslinkable epoxy resins and urethane-based resins. (Adhesive layer) The light incident side polarizing plate used in the present invention may be on the liquid crystal cell side of the unit side protective film or the optical compensation film (the side opposite to the surface of the unit side protective film or the optical compensation film and the laminated polarizing film) ) has an adhesive layer. Such an adhesive layer can be used for bonding to a liquid crystal cell. The adhesive constituting the pressure-sensitive adhesive layer is not particularly limited as long as it satisfies various properties (transparency, long-lasting property, secondary workability, and the like) which can be used for the optical film; for example, acrylic acid containing an acrylic resin and a crosslinking agent can be used. An adhesive which is a (meth) acrylate-based monomer composition containing a functional group-containing (meth)acrylic acid monomer as a main component, and a small amount of a (meth)acrylic monomer having a functional group as a polymerization initiator. The glass transition temperature (Tg) obtained by radical polymerization in the presence of zero is zero. (The following acrylic resin. Here, the (meth) acrylate which is a main component of the acrylic resin can be represented by the following formula: CH2=C(R1)COOR2 wherein R represents a hydrogen atom or a methyl group' R2 represents a decyl group having a carbon number of 丨14, or an aryl group, and a hydrogen atom of an alkyl group of R2 or a hydrogen atom of an aralkyl group may be substituted by an alkoxy group having a carbon number of 1 to 10. The mono(indenyl)acrylic monosystem contains a monomer having a polar functional group such as a group, a carboxyl group, an amine group or an epoxy group and a dilute hydrocarbon double bond (usually a (fluorenyl) acrylonitrile group). 151581.doc 201128268 Specific examples of the (meth) acrylate which is a main component of the acrylic resin, for example, R1*H and R2 are n-butyl butyl acrylate, or R丨 is Η and R_2 is 2 -ethylhexyl acrylate 2-ethylhexyl acrylate, etc. Further, as a specific example of the (meth)acrylic monomer having a functional group, for example, a (meth)acrylic monomer having a hydroxyl group may be mentioned. Acetic acid 2 pen base ethyl g 曰 ' as a slow-group (fluorenyl) acrylic acid monomer In the case of producing the acrylic resin, a small amount of a monomer having a plurality of (fluorenyl) acrylonitrile groups in the molecule may be copolymerized, and as an example, 1,4 - butyl may be mentioned. In the case of producing an acrylic resin, the (meth) acrylate and the (meth)acrylic monomer having a functional group may be used singly or in combination of plural kinds. A plurality of acrylic resins which are copolymers of a (meth) acrylate and a functional group-containing (fluorenyl) acrylic monomer may be combined, or another acrylic resin may be blended in the acrylic resin as the copolymer, for example, An acrylic resin composition which does not have a homopolymer or a copolymer of a functional group (fluorenyl) acrylic monomer, forms an acrylic resin composition, and is used as a resin component of an adhesive. In an acrylic adhesive The crosslinking agent to be blended may be an isocyanate compound, an epoxy compound, a metal chelate compound, an aziridine compound or the like. In addition to the compound itself having at least two isocyanato groups (-NCO) in the molecule, an adduct obtained by reacting the compound with a polyhydric alcohol or the like, a dimer or a trimer thereof may be used. Specific examples of the crosslinking agent include, as the diisocyanate-based compound, ruthenium, 6-hexyl-isocyanuric acid, methacrylic acid-added adduct, toluene diisocyanate, 151,581.doc • 42·201128268 A burnt-added product or the like is used, and each of the diisocyanic acid-based compound is used in a solution obtained by dissolving in an organic solvent such as ethyl acetate. These cross-linking agents may be used alone or in combination with other ones. The weight average molecular weight of the acrylic resin contained in the acrylic adhesive is usually about 600,000 to 2,000,000 in terms of standard polystyrene conversion by gel permeation chromatography (GPC). It is preferably 800,000 to 18 million. If the weight average molecular weight is less than 6 G', there is a case where the adhesion or durability is lowered. In addition, when the weight average molecular weight exceeds 10,000, the adhesive layer becomes too hard, and it is difficult to peel off after adhesion, or an unsuitable stress birefringence is imparted to the bonded unit side protective film or optical compensation film. . An acrylic acid-based adhesive solution can be obtained by dissolving the acrylic resin in an organic solvent such as ethyl acetate and further adding a crosslinking agent. In addition, one or two or more of a burn-in coupling agent, a stabilizer, a tackifier, a plasticizer, a softener, a pigment, and an inorganic filler may be contained as needed, and further, light diffusing fine particles such as organic beads may be contained. . The acrylic pressure-sensitive adhesive solution obtained in the above manner is usually applied to a film on a film to be heated at 60 to 12 Torr for about 5 to 1 minute, and then the organic solvent is removed to form an adhesive layer. Then, after the unit-side protective film or the optical compensation film is bonded to the pressure-sensitive adhesive layer, for example, the mixture is aged at a temperature of 23 t and a humidity of 65%, and the crosslinking agent (C) is sufficiently reacted. Alternatively, after the adhesive layer is formed on the release film, the release film can be bonded to obtain a separate sheet of the adhesive layer supported by the substrate such as the unprotected film. 151581.doc • 43- 201128268 In this case, After laminating the release film, for example, it is aged for about 5 to 2 days under a ring of a temperature of 23t: and a humidity of 65%, and the crosslinking agent (c) is sufficiently reacted. The individual sheets of the adhesive are protected on the unit side. In the production of a film or an optical compensation film, if necessary, the film on one side is peeled off and bonded to the unit side protective film or the optical compensation film. The raw material of the acrylic adhesive as described above can be easily obtained commercially. Products, for example, can be listed as follows: : various propylene_monomers (manufactured by Nippon Shokubai Co., Ltd., manufactured by Toagosei Co., Ltd.), 2,2-azobisisobutyronitrile as a polymerization initiator, etc. Co., Ltd. manufactures, Japan Finechem shares have Manufactured by the company), as a cross-linking agent, 6-hexan-isocyano ISa and its methyl propylene burning power π-form, azulidine diisocyanate vinegar and its ternary thiophene propylene compound adduct (Mitsui Manufactured by Chemieals pGlyurethanes Co., Ltd., manufactured by Sumika Bayer Urethane Co., Ltd.) Also, the adhesive sheet is also commercially available, and examples thereof include "substrate-free adhesive film and sheet" (manufactured by Lintec Co., Ltd., Nitto Made by Electric Co., Ltd.). <Light-emitting-side polarizing plate> In the liquid crystal display device of the present invention, the polarizing plate (light-emitting-side polarizing plate 40) used for the light-emitting side of the liquid crystal cell may be a previously known polarizing plate or a light A polarizing plate having the same configuration as the incident side polarizing plate, that is, a polarizing plate having a protective film having optical anisotropy on the side opposite to the liquid crystal cell of the polarizing film. When the light-emitting side polarizing plate 40 is the same as the light-incident side of the light-incident side, the polarizing plate is preferably a surface of the 15158I.doc-44 · 201128268 light-emitting side of the protective film 42 having optical anisotropy ( The surface opposite to the surface on which the polarizing film 41 is laminated) is provided with at least one functional layer selected from the group consisting of an antiglare layer, a hard coat layer, an antireflection layer, and an antistatic layer. In this case, the polarizing plate (light incident side polarizing plate) disposed on the light incident side of the liquid crystal display device is also a polarizing plate defined by the present invention. <Liquid Crystal Cell> The polarizing plate with the above-mentioned adhesive layer is bonded to one surface or both surfaces of the liquid crystal cell via the adhesive layer, whereby a liquid crystal panel can be obtained. The liquid crystal cell has a function of changing the alignment state of the liquid crystal by applying a voltage in order to switch the amount of transmitted light, and sealing the liquid crystal between the two transparent substrates, and according to the alignment state and the counter electrode of the liquid crystal layer enclosed therein The alignment state of the liquid crystal layer when a voltage is applied thereto includes, for example, a twisted nematic (TN, Nematic) mode, a vertical alignment (VA) mode, and an IPS (In-Plane Switching) mode. In the present invention, liquid crystal cells widely used in various modes of general liquid crystal display devices can be used. The performance of the unit side protective film or the optical compensation film laminated on the liquid crystal cell side of the polarizing film can be selected according to the above liquid crystal cell. It is preferable to select the operation mode or characteristics of the unit. <Backlight> The liquid crystal display device of the present invention is provided in the liquid crystal.

面板之背側的背、以及該面光源上之最靠具有光學異向性之光學片構相軸係以與鄰接之光入射側護膜之遲相軸所成角 151581.doc -45- 201128268 度成為60°以下之方式配置。藉由形成此種構成，可顯著減少液晶顯示裝置中所產生之由光源側保護膜所引起之色彩不均。 (面光源）背光源所使用之面光源係將來自光源之光均勻地出射至刚面側（液晶面板側）者。面光源例如可為直下型之面光源’該直下型之面光源至少具備擴散板、以及配置於擴散板之背側（與液晶面板相反側）之光源，其藉由擴散板使來自光源之光均勻地擴散後出射至前面側；面光源亦可為側光型之面光源，該側光型之面光源至少具備導光板、以及配置於導光板之側方之光源，其使來自光源之光暫時入射至導光板内，並自導光板之液晶面板側表面將光均勻地出射至前面側。上述擴散板及導光板均可由透明之熱塑性樹脂或熱硬化性樹脂等透明樹脂構成，作為透明樹脂，例如可列舉：聚甲基丙烯酸曱酯樹脂、曱基丙烯酸甲酯-苯乙烯共聚物樹脂、聚苯乙稀樹脂、聚烯烴樹脂（包括環狀烯烴樹脂）以及聚碳酸酯樹脂等。擴散板係具有遮蔽光源之像，並且使來自光源之光均勻地擴散後出射至前面側，而形成面光源之功能的光學構件。擴散板通常配置於光源與液晶面板之間（光源至液晶面板之光路上）。作為擴散板，可較佳地使用於上述透明樹脂中分散具有與透明樹脂不同之折射率之光擴散劑而成者。作為光擴散劑，可使用與透明樹脂不相容之粒子，且 151581.doc • 46 · 201128268 與透明樹脂之折射率差 0.05〜〇 2 n 通吊為0.01〜0.3，較佳為 .，量平均粒徑通常為卜15 的粒子。作A #媳私权佳為2〜〗0 μηι 二氧化矽粒子、氫氧玻堝珠子拉子、碳_粒子、碳酸鋇粒 +、品κ '、機粒子，或者苯乙烯樹脂粒子丙稀酸系樹脂粒子、聚 μ 不矽虱粒子等有機粒子等。擴散板中之光擴散劑之合钔乏3罝根據所應用之液晶顯示梦晋中之擴散板之要求特性而有曰曰置 1〇〇# θ ^ 有斤不门’例如相對於透明樹脂 100重里份，可設為〇八^ 更量伤左右，較佳為0.3〜7重量刀。較佳為以於擴散板每單位 ,2 價r <含ϊ：達到2〜200 g/m之方式含有光擴散劑，含有光擴散劑。更佳為以達到3〜7〇—之方式 :光板係側光型之背光源中所使用之光學構件具有將來自配置於其側方之光源之光轉将換成面發光的功能。導光板可狄為包含上述透明樹十扳狀或楔狀構件。透明樹月曰中亦可含有抗靜電劑、阻麻丨莖欠站，，‘東外線吸收劑、抗氧化 J夺各種添加劑。又，亦可於、導光板之背面側（與液晶面板相反側)表面設置由白色顏料形成之點圖案。作為面光源中所使用之光源，例如可採用：使用榮光管發出白色光之冷陰極螢光燈几燈（CCFL，Cold Cathode Fluorescent Lamps)、或者發先 _ 尤一極體（Light EmittingThe back side of the panel and the most optically anisotropic optical sheeting axis on the surface source are at an angle to the retardation axis of the adjacent light incident side shield 151581.doc -45 - 201128268 The degree is 60° or less. By forming such a configuration, color unevenness caused by the light source side protective film generated in the liquid crystal display device can be remarkably reduced. (surface light source) The surface light source used for the backlight is such that the light from the light source is uniformly emitted to the front side (the liquid crystal panel side). The surface light source may be, for example, a direct-type surface light source. The direct-surface light source includes at least a diffusing plate and a light source disposed on a back side of the diffusing plate (on the side opposite to the liquid crystal panel), and the light from the light source is diffused by the diffusing plate Uniformly diffusing and then emitting to the front side; the surface light source may also be a side light type surface light source, the side light type surface light source having at least a light guide plate and a light source disposed on a side of the light guide plate, which makes the light from the light source It is temporarily incident into the light guide plate, and the light is uniformly emitted from the side surface of the liquid crystal panel of the light guide plate to the front side. The diffusing plate and the light guiding plate may be made of a transparent resin such as a transparent thermoplastic resin or a thermosetting resin. Examples of the transparent resin include polymethyl methacrylate resin and methyl methacrylate-styrene copolymer resin. Polystyrene resin, polyolefin resin (including cyclic olefin resin), polycarbonate resin, and the like. The diffusing plate has an optical member that shields the image of the light source and uniformly diffuses the light from the light source and then exits to the front side to form a function of the surface light source. The diffuser is usually disposed between the light source and the liquid crystal panel (the light path from the light source to the liquid crystal panel). As the diffusion plate, a light diffusing agent having a refractive index different from that of the transparent resin in the above transparent resin can be preferably used. As the light diffusing agent, particles which are incompatible with the transparent resin can be used, and the refractive index difference of 151581.doc • 46 · 201128268 from the transparent resin is 0.05 to 〇 2 n, and the hanging is 0.01 to 0.3, preferably, the average amount. Particles usually having a particle size of 15 are used. For A #媳私权佳为2~〗 0 μηι cerium oxide particles, hydrogen oxychloride glass beads, carbon _ particles, strontium carbonate +, κ ', machine particles, or styrene resin particles acrylic acid It is an organic particle such as a resin particle or a poly μ particle. The combination of the light diffusing agent in the diffusing plate is insufficient. According to the required characteristics of the diffusing plate of the liquid crystal display of the application, there is a setting of 1 〇〇 # θ ^ 斤不不 ' ' In the case of heavy weight, it can be set to 〇8^ more damage, preferably 0.3~7 weight knife. Preferably, the diffusing plate contains a light diffusing agent per unit, and a light diffusing agent is contained in a ratio of 2 to 200 g/m per unit. More preferably, it is 3 to 7 inches. The optical member used in the backlight of the light-plate type side light type has a function of converting light from a light source disposed on the side thereof into a surface light. The light guide plate may be a ten-shaped or wedge-shaped member including the above transparent tree. Transparent tree The moon scorpion can also contain antistatic agents, and the phlegm stalks are owed to the station, and the ‘east outer line absorbent and antioxidant J take various additives. Further, a dot pattern formed of a white pigment may be provided on the surface of the back surface of the light guide plate (on the side opposite to the liquid crystal panel). As the light source used in the surface light source, for example, a cold cathode fluorescent lamp (CCFL) which emits white light using a glory tube, or a light illuminator (Light Emitting)

Diode : LED)等。 (具有光學異向性之光學片構件）本發明中所使用之背光源係至少王夕於最靠近液晶面板之表 151581.doc •47- 201128268 面具備具有光學異向性之光學片構件者。於本發明中，該光學片構件之遲相軸係以相對於鄰接之光入射側偏光板的具有光學異向性之光源側保護膜之遲相軸成為6 0。以下的方式配置。作為上述光學片構件，只要為具有光學異向性之片材狀之構件，則並無特別限定，其中，可較佳地使用在表現出光于異向性之透光性基材膜之一面或兩面積層光學層而構成者例如，擴散膜、微透鏡膜、透鏡片等一般採用上述構成，可較佳地用於本發明。本發明藉由利用該等液晶顯示裝置中一般所具備之光學片，可不增加新構件’而有效地獲得色彩不均較少之液晶顯示裝置。於本發月中，上述基材膜具有光學異向性，具體而言，具有於平面方向折射率不同之雙折射性，並具有光轴角度及相位差值（Retardation value)。又，通常，使用上述具有光學異向性之基材膜的光學片構件之遲相軸角度、面内相位差值等光學特性直接反映基材膜之性能。於將上述基材膜之面内之遲相軸方向的折㈣設為〜，將面内與遲相軸正交之方向之折射率設為〜，將厚度設為 d之情形時’面内相位差值以可表示為（nx_ny)xd，厚度方向之相位差值Rth可表示為[(nx+ny)/2_njxd。作為上述基材膜之形成材料，就透明性、耐光性、塗佈適應性方面而言，理想的是使用聚碳酸醋或聚對苯二甲酸乙二醋’尤其可使用無色透明之合成樹脂。作為該合成樹脂，並無特別限定，例如可列舉：聚對苯 I5158i.doc •48· 201128268 聚萘二甲酸乙二酯、丙烯酸系樹脂、聚碳酸酯、聚苯乙烯、聚烯烴、乙酸纖維素、耐候性氣乙烯等。其中，較佳為透明性、強度較高，容易控制相位差值之聚對苯二甲酸乙二酯或聚碳酸酯，尤佳為彎曲性能獲得改善之聚對苯二甲酸乙二酯。上述基材膜之厚度（平均厚度）並無特別限定，較佳為設為10 μΐη以上、400 μπι以下。若上述基材膜之厚度未達上述範圍，則會發生㈣用於形成光擴散層等光學層之聚合物組合物時容易產生捲曲等不良情況。相反地若上述基材膜之厚度超過上述範圍’則存在液晶顯示裝置之亮度下降之情形，又，亦存在背光單元之厚度變大而違反液晶顯不裝置之薄型化之要求的情形。上述基材膜較佳為面内之相位葚枯或彳Λ Λ 仲產值為1000 nm以上，尤佳為5000 nm以上。於採用使從用畀有上述乾圍之相位差值之基材膜的光學片構#之悟取# . 子片稱仵之匱形時，可更有效地減少液晶顯示裝置之色彩不均。作為基材膜之製造方法，只要可獲得上述目標範圍之遲相轴角度、面内相位差值等光學性能，則並無特別限定。 2於採用聚對苯二甲酸乙^之情形時，可藉由調整延处理時之延伸溫度、延伸倍率、鬆弛處理、線速等延伸 =而進行控制…當於素材之寬度方向(與長度方向 2向）上存在光學性能之不均時’亦可僅選擇使用八有目標之光學性能之寬度範圍。作為於上述基材膜之-面或兩面積層光學層而成之光學 15158l.doc •49· 201128268 片構件’ 一般普及的是上述所例示之擴散膜、微透鏡片、透鏡片等。擴散膜係具有使來自光源之光均勻地擴散後出射至前面側之功能、以及控制光之角度以提高正面亮度之功能的光學構件，其通常配置於光源與液晶面板之間（光源至液晶面板之光路上）。於背光源之面光源具備擴散板之情形時’擴散膜係配置於擴散板與液晶面板之間。作為擴散膜’例如可使用於透光性基材膜之至少一面形成有分散有光擴散劑之透明樹脂層（黏合劑層）者。微透鏡片係具有使來自光源之光均勻地擴散後出射至前面側之功能，以及藉由使光線向法線方向側折射而聚光，而提间正面亮度之功能的片材，其一般表現出較擴散膜更南之正面亮度提高能力。作為微透鏡片，例如可使用於透光性基材膜之一面幾何配置有多個半球狀（包括近似半球之形狀）之微透鏡者。透鏡片係具有使來自光源之光聚光，而提高正面亮度之功能的片材，可使用於上述透明樹脂之表面形成有特定形狀之微細凹凸者。透鏡片根據微細凹凸表面之形狀，有凸鏡狀片材、稜鏡片等。例如可使用於透光性基材膜之一面並列配置有複數個透鏡列者。上述光學片構件亦可於無損本發明之目的之範圍内，包含光擴散材、填充材、脫模劑、紫外線吸收劑、抗氧化劑等穩疋劑、阻燃劑等。又，表面可為平滑面，亦可設置用於使光擴散之細小凹凸。 151581.doc •50· 201128268 於本發明中’可較佳地應用上述光學片構件之任一者，其中，就通用性或成本之觀點而言，本發明令用擴散膜。上述擴散膜通常於基材膜之至 v尤出射側之表面上具備刀散有光擴散劑之黏合劑層作為剛潛料先學層，且藉由上述光擴散劑，可使光學層均勻地擴散自背面側透射之光線。光學層之平均厚度並無特別限定，例如設為i _以上、以下之程度。光擴散劑係具有使光線擴散之性f之粒子，大致機填料與有機填料。作為益機填 ‘ ^ 巧…微填科，例如可使用：二氧化石夕、氫氧化紹、氧化銘、氧化辞砰硫化鋇、矽酸鎂、或該 4之混合物。作為有機填料之例如可使用：丙烯酸糸树月曰、丙稀腈樹脂、聚胺基甲酸醋、聚氯乙稀、聚苯乙稀、聚丙稀腈、聚酿胺等。其中，較佳為透明性較高之丙稀酸糸樹脂，尤佳為聚甲其工為聚甲基丙烯酸甲酯（PMMA， polymethyl methacrylate)。作為光擴散劑之形狀，並無特別 j限疋例如可列舉：球狀、紡鐘形狀、針狀、棒狀、立方狀、板狀、鱗片狀維狀等’其中，較佳為光擴散性優異之球狀之珠粒。光擴散劑之平均粒徑例如為^50 μηι，、又证馬j〜10 μηι。每光擴散劑之平均粒控在上述範圍以外時，、町存在如下之情形：作為擴散片材所需之光擴散性表現得難以均勻地擴散至基材膜^ ^、或者光擴散劑光擴散劑之調配量（固形物成分換算）相對於作為基質之 151581.doc 201128268 黏合劑100份，較佳為10〜500份，更佳為2〇〜3〇〇份，更佳為50〜200份。當光擴散劑之調配量在上述範圍以外時，存在光擴散性變得不充分、或者藉由黏合劑之光擴散劑之固定力下降的情形。黏合劑係藉由使包含基材聚合物之聚合物組合物交聯硬化而形成。用於形成該透明樹脂之聚合物組合物除基材聚合物以外，亦可適宜調配例如微小無機填充劑、硬化劑、塑化劑、分散劑、各種調平劑、紫外線吸收劑、抗氧化劑、黏性改質劑、潤滑劑、光穩定劑等。作為上述基材聚合物，並無特別限定，例如可列舉：丙烯酸系樹脂、聚胺基甲酸酯、聚酯、a系樹脂、聚矽氧系樹脂、聚醯胺醯亞胺、環氧樹脂、紫外線硬化型樹脂等，該等聚合物可使用一種，或者混合使用兩種以上。又，黏合劑中所使用之基材聚合物本身就提高光線之透射性之觀點而言，較佳為透明，尤佳為無色透明。作為上述擴散膜之製造方法，可採用公知技術。例如有如下方法：於構成黏合劑層之聚合物組合物中混合光擴散劑來製造光學層用組合物’將該光學層用組合物積層於基，膜之表面’並使其硬化，藉此形成光學層，從而獲得擴散膜。又，此時，在基材膜之與形成光學層之側相反之面積層抗黏層用組合物，並使其硬化，藉此形成抗黏層亦較乍為將上述光學層用組合物及抗黏層用組合物積層於土材膜之方法，並無特別限定，例如採用使用棒式塗佈機刮刀塗佈機、旋轉塗佈機、輥式塗佈機'凹版塗佈 I5I58i.doc -52- 201128268 機、流塗機'喷霧、網版印刷等進行塗佈之方法，考慮上述組合物之黏度、目標膜厚、基材膜之表面狀態等而選擇最佳者來進行。自以上述方式所製作之擴散膜之素材，根據所需尺寸切出擴散膜’並將其搭載於背光源上。於本發明中，將以上述擴散膜為代表之由具有光學異向性之基材膜所構成之具有光學異向性的光學片構件搭載於背光源中之液晶面板侧之最表面，此時之該光學片構件之遲相軸係以相對於鄰接之光入射側偏光板的光源侧保護膜之遲相軸成為60。以下之方式配置。於本發明令，光學片構件之遲相軸角度、面内相位差值等光學性能直接反映基材膜之光學性能，因此只要將基材膜之光學性能調整至目標範圍内即可。又，藉由調節自光學片素材切出光學片構件時之位置及角度，可將光學片構件之遲相軸方向控制在本發明之範圍内。 (光學片類）於上述面光源與光學片構件之間，亦可進而設置光學片類•亥光學片類係選自各種背光源用之光學構件者可為二、#光源中配置在最#近液晶面板之表面之光學片構件; 同的構件，亦可為相同之構件。作為光學片類之具體例，了列舉：擴散膜、微透鏡片、透鏡片、反射型偏光分離膜等。 (反射板）本發明中所使用之背光源較佳為進而具備配置於面光源 151581.doc •53- 201128268 之背面側（與液晶面板相反側）的反射板。反射板係具備使出射至面光源之背面側之光反射，並提高向前面側出射之光量之#能的具有高反射率之光學構件。作為反射板，例如可使用於上述透明樹脂中分散有無機填料、顏料等添加劑者’或者使上述透明樹脂發泡而成者。 <光學構件組> 本發明亦關於一種用於具備液晶單元及背光源之液晶顯示裝置之光學構件組。光學構件組係光學構件之組合，其包括：用以配置於液晶單元之背光源側之上述光入射側偏光板、以及用以配置於背光源之最靠近液晶單元之位置的上述具有光學異向性之光學片構件。光入射側偏光板與光學片構件無需製成一體，為了在通常之液晶顯示裝置之製造步驟中使用，較佳為獨立之構件。構成光學構件組之光入射側偏光板與上述光入射側偏光板相同，具有包含聚乙烯醇系樹脂之偏光膜、以及積層於上述偏光膜之一面的具有光學異向性之光源側保護膜。於使用光學構件組製造液晶顯示裝置時，係以使具有光學異向性之光源側保護膜位於背光源側之方式配置光入射側偏光板’且於背光源上之最靠近液晶單元之表面配置具有光學異向性之光學片構件。此時，光入射側偏光板及光學片構件係以使光源側保護膜之遲相軸與具有光學異向性之光 +片構件之遲相軸所成角度成為6〇。以下之方式配置。又’構成光學構件組之上述光入射側偏光板及上述光學片構件分別為長方形，較佳為將上述光入射側偏光板之光 151581.doc •54- 201128268 源側保護膜之遲相軸的偏差角度及上述光學片構件之遲相軸之偏差角度兩者相對於長方形之長邊設定為45。以内，或者將上述光入射側偏光板之光源侧保護膜之遲相軸的偏差角度及上述光學片構件之遲相軸之偏差角度兩者相對於長方形之短邊設定為45。以内後，將光入射側偏光板與光學片構件之長邊或短邊對齊而配置。由於一般之液晶顯示裝置之形狀為長方形，因此藉由將光入射側偏光板之光源側保護膜與光學片構件亦設定為上述配置關係，可平衡性較佳且有效地減少色彩不均.又，於一般之液晶顯示裝置之生產方面較佳。當然，於上述情形時，亦以使光學片構件之遲相軸相對於光入射側偏光板之光源側保護膜之遲相軸成為60°以下的方式進行配置。實施例以下，揭示實施例來更具體地說明本發明，但本發明不受該等例限制。以下之例中所使用之光學片構件如下，以下，以各自之記號來表示。擴散膜均採用對角尺寸為4〇英吋（=約Μ〕 cm)之長方形者，基材膜之材料係採用聚對苯二甲酸乙一酯。面内相位差值R〇及遲相軸角度分別利用相位差膜光學材料檢查裝置RETS(大塚電子股份有限公司製造）進行則定。 (A)擴散膜面内相位差值R〇 : 1 〇〇〇〇 nm，遲相轴相對於長邊方向偏差角度：0° 151581.doc -55- 201128268 (B) 擴散膜 nm，遲相軸相對於長邊方向之面内相位差值R〇 : 10000 偏差角度：30° (C) 擴散膜面内相位差值R〇 : 10000 偏差角度：45。 nm，遲相軸相對於長邊方向之 (D) 擴散膜面内相位差值R〇 : 10000 nm，遲相軸相對於長邊方^之偏差角度：60。 (E) 擴散膜面内相位差值R〇 : 10000 nm，遲相軸相對於長邊方向之偏差角度：70。又’以下之例中所使用之延伸聚對苯二甲酸乙二醋膜之厚度係以廠商標稱值表示。延伸聚對苯二甲酸乙二酿膜之面内相位差值R〇、Nz係數及遲相軸角度係分別利用相位差膜·光學材料檢查裝置RETS(大塚電子股份有限公司製造）進行測定。又’包含環狀烯烴系樹脂之光學補償膜之厚度、面内相位差值R〇、以及厚度方向相位差值Rth係以廠商標稱值表示。包含環狀烯烴系樹脂之光學補償膜之厚度、面内相位差值R〇、以及厚度方向相位差值Rth亦使用相位差膜.光學材料檢查裝置RETS(大塚電子股份有限公司製造）進行實測，獲得大致相同之值。 <實施例1> 15I581.doc •56· 201128268 (a) 偏光膜之製作使平均聚合度約為2400，皂化度為99.9莫耳％以上且厚度為75 μΐΠ之聚乙烯醇膜浸潰於30°C之純水中後，將其於 3〇 C下次潰於峨/碘化鉀/水之重量比為〇〇2/2/1〇〇之水溶液中。其後，將其於56.5。(：下浸潰於碘化鉀/硼酸/水之重量比為12/5/100之水溶液中。繼而利用8t之純水進行清洗後於65 c下進行乾燥，獲得於聚乙烯醇上吸附配向碘之偏光膜延伸主要於蛾染色及蝴酸處理之步驟中進行，總延伸倍率為5.3倍。 (b) 附帶黏著劑之偏光板之製作對厚度為38 μπι2延伸聚對笨二曱酸乙二酯膜（面内相位差值R〇 : 1000 nm，Νζ係數為7〇)之貼合面實施電暈處理後，藉由具備封閉式刮刀（chamber d〇ct〇r)之塗佈裝置將含有脂環式環氧化合物之無溶劑之活性能量線硬化性接著劑組合物塗佈為厚度2 μπι。又，對厚度為73 μηι之包含環狀烯烴系樹脂的光學補償膜（面内相位差值R〇 : 63 nm，厚度方向相位差值Rth ·· 225 nm)之貼合面實施電暈處理後與上述同樣地藉由相同之裝置將接著劑組合物塗佈為厚度2 μηι 〇繼而，立即利用貼合輥，經由各接著劑組合物之塗佈面，於上述（a)中所獲得之偏光膜的一面貼合上述延伸聚對苯二甲酸乙二S旨膜’於另-面貼合上述光學補償膜。此時，偏光膜之透射軸與延伸聚對苯二甲酸乙二顆膜之遲相軸的偏差設定為0度。其後，自該積層物之延伸聚對苯二 151581.doc -57· 201128268 甲酸乙二醋膜側’以使320-400 nm之波長下之累計光量達到600 mJ/cm2的方式進行金屬鹵化物燈照射，而使兩面之接著劑硬化。進而，於所獲得之偏光板之光學補償膜的外面設置厚度為25 μιη之丙烯酸系黏著劑層（附帶隔離膜）。 (c)液晶顯示裝置之製作自索尼（股）製造之垂直配向模式之液晶顯示裝置「BRAVIA」（對角尺寸40英吋=約1〇2 cm)的液晶面板剝離光出射側偏光板，代替該光出射側偏光板，將市售之偏光板（Sumikalan SRW842E-GL5，住友化學（股）製造）以與原來之偏光板相同之軸方向貼附於其黏著劑層側。又，剝離光入射側偏光板，代替該光入射側偏光板，將自上述中所製作之附帶黏著劑層之偏光板剝離隔離膜而成者以與原來之偏光板相同之軸方向貼附於其黏著劑層側（偏光膜之吸收軸、以及延伸聚對苯二甲m旨膜之遲相轴與面板之長邊方向一致之軸方向）β繼而，自該液晶顯示裝置將配置於背光源之擴散板上之光學片構件全部拆除，並配置上述（Α)之擴散膜來代替該等光學片構件。藉此，製成擴散膜之遲相軸相對於光入射側偏光板之延伸聚對苯二曱酸乙二醋膜之遲相軸的偏差角度（軸偏差角度）為0。之液晶顯示裝置。目測觀察所獲得之液晶顯示裝置，結果斜向之色衫不均（干涉不均）較弱，視覺辨識性良好。 <實施例2> 除使用上述（Β)之擴散膜以外，以與實施例丨相同之方式製作轴偏差角度為30。之液晶顯示裝置。目測觀察所獲得 151S81.doc •58· 201128268 之液晶顯示裝置，結果料a 、，。禾斜向之色妒視覺辨識性良好。 y g(干涉不均）較弱，〈實施例3> 除使用上述（C)之擴散^卜，以製作軸偏差角度為45。 ^ 包例1相同之方式 <展晶顯示裝置。目.a| 4 之液晶顯示裝置，姓要处a 測硯察所獲得罝、、.。㈣ ^ 視覺辨識性良好。、丁 /步不均）較弱， <實施例4> 彍散膜以外，以盥製作軸偏差角度成為6。。之液晶顯示裝置:V:之方式得之液晶顯示裝置’結果斜向之色彩目::察:獲較弱，視覺辨識性良好。〜不均）相對 <比較例1 > 除使用上述⑻之擴散膜以外以製作轴偏差角度為70。之液晶顯示裝置。？"相同之方式之液晶顯示裝置，社果# " 測觀察所獲得 '，。果斜向之色彩不均（干涉視覺辨識性欠佳。 7 +均）軼強，〈實施例5> 除使用延伸聚對笨二甲酴 4ΛΛΛ •文乙二酯膜（面内相位差值、： 4〇〇〇 nm ’ Νζ係數為1 8)作口 ·δ)作為偏光膜之光源側保護膜以外以與貫施例1相同之方式製作軸偏差角度為〇。之液晶顯示装置。目測觀察所獲得之液晶顯示裝置，結果斜向之色彩不均（干涉不均）較弱，視覺辨識性良好。 <實施例6 > 151581.doc -59· 201128268 除使用上述（B)之錢m卜，㈣實施㈣製作軸偏差角度為30。之液晶顯示裝二" 之液晶顯亍步晉，壯罢钮A 目測觀察所獲得視覺辨識性良好。干涉不均）較弱， <實施例7> 除使用上述（C)之擴散膜以外，以盘制你，、貫施例5相同之方式 1作軸偏差角度為45。之液晶顯示裝置。置目測觀察所獲得 b “，員示裝置’結果斜向^料均（干視覺辨識性良好。 <實施例8> 除使用上述（D)之擴散膜以外，以與實施例5相同之方式製作轴偏差角度成為60。之液晶顯示裝置。目測觀察所獲得之液晶顯示裝置，結果斜向之色彩不均（干涉不均）相對較弱，視覺辨識性良好。 <比較例2> 除使用上述（E)之擴散膜以外，以與實施例5相同之方式製作轴偏差角度為70。之液晶顯示裝置。目測觀察所獲得之液晶顯示裝置，結果斜向之色彩不均（干涉不均）較強，視覺辨識性欠佳。針對各例，將擴散膜之遲相軸相對於光入射側偏光板中之延伸聚對苯二甲酸乙二醋膜之遲相軸的偏差角度與試驗結果匯總於表1。纟1中之軸偏差角度表示》夜晶顯示裝置中之擴散膜之遲相轴相對於光入射側偏光板之延伸聚對苯二甲酸乙二酯膜之遲相軸的偏差角度。 151581.doc •60· 201128268 [表i] 實施例1 實施例2 實施例3 實施例4 比較例1 實施例5 實施例6 實施例7 實施例8 比較例2 軸偏差角度 η 0 30 45 60 70 0 30 45 60 70 光源側保護膜之Νζ係數 7.0 7.0 7.0 7.0 7.0 1.8 1.8 1.8 1.8 1.8 不均強度較弱較弱較弱相對較弱較強較弱較弱較弱相對較弱較強如表1所示’轴偏差角度為60。以下之實施例1〜8可見液晶顯示裝置中之色彩不均較弱，視覺辨識性優異之效果。另一方面，軸偏差角度高於6〇。之比較例1及2之色彩不均較強’視覺辨識性欠佳。【圖式簡單說明】圖1係表示本發明之液晶顯示裝置之層構成之一例的刮面示意圖。【主要元件符號說明】 10 面光源 11 反射板 12 光學片構件 20 背光源 30 光入射側偏光板 31、41 偏光膜 32 光源側保護膜 33、43 單元側保護膜或光學補償膜 34' 44 黏著劑層 40 光出射側偏光板 151581.doc -61 - 201128268 42 保護膜 50 液晶單元 60 附帶黏著劑層之光入射側偏光板 70 附帶黏著劑層之光出射側偏光板 80 液晶面板 151581.doc •62·Diode : LED) and so on. (Optical sheet member having optical anisotropy) The backlight used in the present invention is at least one of the optical sheet members having optical anisotropy on the surface closest to the liquid crystal panel 151581.doc • 47-201128268. In the present invention, the retardation axis of the optical sheet member is 60 as the retardation axis of the light source side protective film having optical anisotropy with respect to the adjacent light incident side polarizing plate. The following ways are configured. The optical sheet member is not particularly limited as long as it is a sheet-like member having optical anisotropy. Among them, it can be preferably used on one side of a light-transmitting substrate film which exhibits light anisotropy or For example, a diffusion film, a microlens film, a lens sheet, and the like are generally used in the present invention, and can be preferably used in the present invention. According to the present invention, by using an optical sheet generally provided in such liquid crystal display devices, a liquid crystal display device having less color unevenness can be efficiently obtained without adding a new member'. In the present invention, the base film has optical anisotropy, specifically, birefringence having a refractive index different in the planar direction, and has an optical axis angle and a retardation value. Further, in general, the optical characteristics such as the retardation axis angle and the in-plane phase difference of the optical sheet member having the above-described optically anisotropic base film directly reflect the performance of the base film. The folding (four) in the direction of the slow axis in the plane of the base film is 〜, the refractive index in the direction orthogonal to the slow axis is 〜, and the thickness is d. The phase difference value can be expressed as (nx_ny)xd, and the phase difference value Rth in the thickness direction can be expressed as [(nx+ny)/2_njxd. As the material for forming the base film, in terms of transparency, light resistance, and coating suitability, it is preferable to use polycarbonate or polyethylene terephthalate. In particular, a colorless and transparent synthetic resin can be used. The synthetic resin is not particularly limited, and examples thereof include: polyparaphenylene I5158i.doc • 48· 201128268 polyethylene naphthalate, acrylic resin, polycarbonate, polystyrene, polyolefin, cellulose acetate Weather resistance, ethylene, etc. Among them, polyethylene terephthalate or polycarbonate which is excellent in transparency and strength, and which is easy to control the retardation value is preferable, and polyethylene terephthalate which is improved in bending property is preferable. The thickness (average thickness) of the base film is not particularly limited, but is preferably 10 μΐη or more and 400 μπι or less. When the thickness of the base film is less than the above range, (4) when a polymer composition for forming an optical layer such as a light diffusion layer is formed, problems such as curling tend to occur. On the other hand, if the thickness of the base film exceeds the above range, the brightness of the liquid crystal display device may be lowered, and the thickness of the backlight unit may be increased to violate the requirement for thinning of the liquid crystal display device. The substrate film preferably has an in-plane phase collapse or 彳Λ 仲 secondary yield of 1000 nm or more, particularly preferably 5000 nm or more. When the optical sheet structure of the substrate film having the phase difference of the above-mentioned dry circumference is used, the color unevenness of the liquid crystal display device can be more effectively reduced. The method for producing the base film is not particularly limited as long as optical properties such as a retardation axis angle and an in-plane retardation value in the above-described target range are obtained. 2 In the case of using polyethylene terephthalate, it can be controlled by adjusting the elongation temperature, stretching ratio, relaxation treatment, line speed, etc. of the extension treatment... as the width direction of the material (with the length direction) When there is unevenness in optical performance on the 2nd direction, it is also possible to select only the width range in which the optical properties of the eight targets are used. The optical member is formed as an optical layer of the above-mentioned base film or a two-layer optical layer. 15158l.doc • 49· 201128268 Sheet member ′ Generally, the above-described diffusion film, lenticular sheet, lens sheet, and the like are exemplified. The diffusing film has a function of uniformly diffusing light from the light source and then emitting the light to the front side, and an optical member for controlling the angle of the light to improve the front brightness, and is usually disposed between the light source and the liquid crystal panel (light source to the liquid crystal panel) On the light road). When the surface light source of the backlight is provided with a diffusion plate, the diffusion film is disposed between the diffusion plate and the liquid crystal panel. As the diffusion film, for example, a transparent resin layer (adhesive layer) in which a light diffusing agent is dispersed can be formed on at least one surface of the light-transmitting substrate film. The microlens sheet has a function of uniformly diffusing light from a light source and then emitting it to the front side, and a sheet which is condensed by refracting the light toward the normal side to provide a function of front luminance, and generally exhibits The front brightness enhancement ability is more south than the diffusion film. As the microlens sheet, for example, a microlens having a plurality of hemispherical shapes (including a shape of a nearly hemispherical shape) may be disposed on one surface of the light-transmitting substrate film. The lens sheet has a function of condensing light from a light source to improve the brightness of the front surface, and it is possible to form fine irregularities of a specific shape on the surface of the transparent resin. The lens sheet has a convex mirror-like sheet, a cymbal sheet or the like according to the shape of the fine uneven surface. For example, a plurality of lens arrays may be arranged in parallel on one surface of the light-transmitting substrate film. The optical sheet member may also contain a light diffusing material, a filler, a mold release agent, a UV absorber, an antioxidant such as a stabilizer, a flame retardant, etc., within the scope of the object of the present invention. Further, the surface may be a smooth surface, and fine irregularities for diffusing light may be provided. 151581.doc • 50· 201128268 In the present invention, any of the above optical sheet members can be preferably applied, wherein the present invention uses a diffusion film from the viewpoint of versatility or cost. The diffusion film generally has a binder layer with a light diffusing agent dispersed on the surface of the substrate film to the exit side of the substrate, and the optical layer is uniformly formed by the light diffusing agent. Diffusion of light transmitted from the back side. The average thickness of the optical layer is not particularly limited, and is, for example, i _ or more and below. The light diffusing agent is a particle having a property of diffusing light, f, a substantially organic filler, and an organic filler. As a profit machine, ‘ ^ 巧...micro-filling, for example, can be used: sulphur dioxide, sulphuric acid, oxidized sulphur, sulphur sulphide, magnesium ruthenate, or a mixture of the four. As the organic filler, for example, acrylic acid eucalyptus, acrylonitrile resin, polyurethane urethane, polyvinyl chloride, polystyrene, polyacrylonitrile, polyamine, and the like can be used. Among them, a bismuth acrylate resin having a high transparency is preferred, and a polymethyl methacrylate (PMMA) is particularly preferred. The shape of the light diffusing agent is not particularly limited, and examples thereof include a spherical shape, a bell shape, a needle shape, a rod shape, a cubic shape, a plate shape, and a scaly shape. Among them, light diffusibility is preferred. Excellent spherical beads. The average particle diameter of the optically diffusing agent is, for example, ^50 μηι, and is also a horse j 10 10 μm. When the average particle size of each of the light diffusing agents is outside the above range, the town has the following conditions: the light diffusibility required as a diffusion sheet is difficult to uniformly diffuse to the substrate film, or the light diffusing agent is diffused. The amount of the agent (converted by the solid content) is preferably 10 to 500 parts, more preferably 2 to 3 parts, more preferably 50 to 200 parts, per 100 parts of the 151581.doc 201128268 adhesive as a substrate. . When the amount of the light diffusing agent is outside the above range, the light diffusibility may be insufficient, or the fixing force of the light diffusing agent by the binder may be lowered. The binder is formed by crosslinking the polymer composition comprising the substrate polymer. The polymer composition for forming the transparent resin may be suitably formulated with, for example, a micro inorganic filler, a hardener, a plasticizer, a dispersant, various leveling agents, ultraviolet absorbers, antioxidants, in addition to the base polymer. Viscosity modifiers, lubricants, light stabilizers, etc. The base polymer is not particularly limited, and examples thereof include an acrylic resin, a polyurethane, a polyester, an a resin, a polyoxyn resin, a polyamide, and an epoxy resin. The ultraviolet curable resin or the like may be used alone or in combination of two or more. Further, the base polymer used in the adhesive itself is preferably transparent in view of improving the transmittance of light, and is particularly preferably colorless and transparent. As the method for producing the above diffusion film, a known technique can be employed. For example, there is a method in which a light-diffusing agent is mixed with a polymer composition constituting a binder layer to produce a composition for an optical layer, and the composition for an optical layer is laminated on a surface of the film, and is cured. An optical layer is formed to obtain a diffusion film. Further, in this case, the composition for the anti-adhesive layer of the area layer opposite to the side on which the optical layer is formed is cured and the anti-adhesive layer is formed to form the composition for the optical layer. The method for laminating the anti-adhesive layer composition on the soil material film is not particularly limited, and for example, using a bar coater blade coater, a spin coater, or a roll coater 'gravure coating I5I58i.doc - 52-201128268 The method of applying the spray or screen printing of a machine or a flow coater is carried out in consideration of the viscosity of the composition, the target film thickness, the surface state of the base film, and the like. The material of the diffusion film produced in the above manner is cut out of the diffusion film according to the required size and mounted on a backlight. In the present invention, an optical sheet member having optical anisotropy, which is composed of a substrate film having optical anisotropy, which is represented by the above-mentioned diffusion film, is mounted on the outermost surface of the liquid crystal panel side in the backlight. The retardation axis of the optical sheet member is 60 with respect to the slow phase axis of the light source side protective film of the adjacent light incident side polarizing plate. The following way is configured. According to the invention, the optical properties such as the retardation axis angle and the in-plane retardation value of the optical sheet member directly reflect the optical properties of the substrate film, so that the optical properties of the substrate film can be adjusted to the target range. Further, by adjusting the position and angle at which the optical sheet member is cut out from the optical sheet material, the retardation axis direction of the optical sheet member can be controlled within the scope of the present invention. (Optical sheet) Between the surface light source and the optical sheet member, an optical sheet may be further provided. The optical sheet is selected from optical components for various backlights. The optical sheet member near the surface of the liquid crystal panel; the same member may be the same member. Specific examples of the optical sheet include a diffusion film, a microlens sheet, a lens sheet, and a reflection type polarization separation film. (Reflecting Plate) The backlight used in the present invention preferably further includes a reflecting plate disposed on the back side (opposite side of the liquid crystal panel) of the surface light source 151581.doc • 53- 201128268. The reflecting plate is provided with an optical member having high reflectance for reflecting light emitted to the back side of the surface light source and increasing the amount of light emitted toward the front side. As the reflector, for example, those obtained by dispersing an additive such as an inorganic filler or a pigment in the above transparent resin or foaming the above transparent resin can be used. <Optical member group> The present invention also relates to an optical member group for a liquid crystal display device including a liquid crystal cell and a backlight. The optical member set is a combination of optical members, comprising: the light incident side polarizing plate disposed on a backlight side of the liquid crystal cell; and the optically opposite direction disposed at a position closest to the liquid crystal cell of the backlight Optical sheet member. The light incident side polarizing plate and the optical sheet member need not be integrally formed, and are preferably separate members for use in the manufacturing steps of a usual liquid crystal display device. The light incident side polarizing plate constituting the optical member group is the same as the light incident side polarizing plate, and has a polarizing film containing a polyvinyl alcohol resin and a light source side protective film having an optical anisotropy laminated on one surface of the polarizing film. When the liquid crystal display device is manufactured using the optical member group, the light incident side polarizing plate is disposed such that the light source side protective film having optical anisotropy is located on the backlight side, and is disposed on the surface of the backlight closest to the liquid crystal cell. An optical sheet member having optical anisotropy. At this time, the light incident side polarizing plate and the optical sheet member have an angle of 6 使 between the slow phase axis of the light source side protective film and the slow phase axis of the optically anisotropic sheet member. The following way is configured. Further, the light incident side polarizing plate and the optical sheet member constituting the optical member group are each a rectangular shape, and preferably the light of the light incident side polarizing plate is 151581.doc • 54 - 201128268. Both the deviation angle and the deviation angle of the slow axis of the optical sheet member are set to 45 with respect to the long side of the rectangle. Further, both the deviation angle of the retardation axis of the light source side protective film of the light incident side polarizing plate and the deviation angle of the slow axis of the optical sheet member are set to 45 with respect to the short side of the rectangle. After that, the light incident side polarizing plate is aligned with the long side or the short side of the optical sheet member. Since the shape of the liquid crystal display device is generally rectangular, the light source side protective film and the optical sheet member of the light incident side polarizing plate are also set to the above-described arrangement relationship, so that the balance can be better and the color unevenness can be effectively reduced. It is preferable in the production of a general liquid crystal display device. Of course, in the above case, the slow axis of the optical sheet member is disposed so as to be 60 or less with respect to the slow phase axis of the light source side protective film of the light incident side polarizing plate. EXAMPLES Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited by the examples. The optical sheet members used in the following examples are as follows, and are denoted by the respective symbols hereinafter. The diffusion film is a rectangle having a diagonal size of 4 〇 (= about Μ cm), and the material of the substrate film is polyethylene terephthalate. The in-plane phase difference value R〇 and the slow-phase axis angle are determined by a phase difference film optical inspection device RETS (manufactured by Otsuka Electronics Co., Ltd.). (A) In-plane retardation value of the diffusion film R〇: 1 〇〇〇〇nm, deviation angle of the slow phase axis with respect to the long side direction: 0° 151581.doc -55- 201128268 (B) Diffusion film nm, slow phase axis In-plane phase difference R〇 with respect to the long-side direction: 10000 Deviation angle: 30° (C) In-plane phase difference value R〇: 10000 Deviation angle: 45. Nm, the phase of the slow phase with respect to the long side (D) The in-plane phase difference of the diffuser film R 〇 : 10000 nm, the deviation angle of the slow phase axis with respect to the long side square: 60. (E) Diffusion film In-plane phase difference value R 〇 : 10000 nm, deviation angle of the slow phase axis with respect to the long side direction: 70. Further, the thickness of the extended polyethylene terephthalate film used in the following examples is expressed by the factory trademark. The in-plane retardation values R〇, Nz coefficients, and the retardation axis angles of the extended polyethylene terephthalate film were measured by a retardation film/optical material inspection apparatus RETS (manufactured by Otsuka Electronics Co., Ltd.). Further, the thickness, the in-plane phase difference value R〇, and the thickness direction retardation value Rth of the optical compensation film containing the cyclic olefin resin are expressed by the factory trademark. The thickness of the optical compensation film containing the cyclic olefin resin, the in-plane retardation value R〇, and the thickness direction phase difference Rth are also measured using a retardation film. Optical material inspection apparatus RETS (manufactured by Otsuka Electronics Co., Ltd.). Get roughly the same value. <Example 1> 15I581.doc •56· 201128268 (a) The polarizing film was produced so that the average degree of polymerization was about 2,400, and the polyvinyl alcohol film having a saponification degree of 99.9 mol% or more and a thickness of 75 μΐΠ was impregnated at 30. After the pure water of °C, it was finally crushed at 3 〇C in an aqueous solution of 峨/potassium iodide/water in a weight ratio of /22/2/1〇〇. Thereafter, it was at 56.5. (: immersed in an aqueous solution of potassium iodide/boric acid/water in a weight ratio of 12/5/100. Then, it is washed with 8t of pure water and then dried at 65 c to obtain adsorption of iodine on polyvinyl alcohol. The polarizing film extension is mainly carried out in the steps of moth dyeing and sulphuric acid treatment, and the total stretching ratio is 5.3 times. (b) The polarizing plate with an adhesive is formed to extend the polyethylene terephthalate film to a thickness of 38 μm. After the corona treatment is applied to the bonding surface (in-plane phase difference R〇: 1000 nm, Νζ coefficient is 7 〇), the coating device with a closed doctor blade will contain an alicyclic ring. The solvent-free active energy ray-curable adhesive composition of the epoxy compound is applied to a thickness of 2 μm, and further to an optical compensation film containing a cyclic olefin resin having a thickness of 73 μm (in-plane retardation value R〇) : 63 nm, thickness direction phase difference Rth · · 225 nm) The bonding surface was subjected to corona treatment, and the adhesive composition was applied to a thickness of 2 μηι 藉 by the same apparatus as above, and then immediately applied. Coiling roll, coated by each adhesive composition The surface of the polarizing film obtained in the above (a) is bonded to the optical compensation film on the other side of the extended polyethylene terephthalate film. The transmission axis of the polarizing film is The deviation of the retardation axis of the extended polyethylene terephthalate film was set to 0. Thereafter, the extension of the laminate was from the side of the poly(p-phenylene 151581.doc -57·201128268 formic acid ethyl phthalate film) The metal halide lamp is irradiated in a manner that the integrated light amount at a wavelength of 320 to 400 nm reaches 600 mJ/cm 2 to harden the adhesive on both sides. Further, a thickness of 25 is provided on the outer surface of the optical compensation film of the obtained polarizing plate. Acrylic adhesive layer (with separator). (c) Liquid crystal display device manufactured in Sony's vertical alignment mode liquid crystal display device "BRAVIA" (diagonal size 40 inches = about 1〇2) The liquid crystal panel of the cm) strips the light-emitting side polarizing plate, and instead of the light-emitting side polarizing plate, a commercially available polarizing plate (Sumikalan SRW842E-GL5, manufactured by Sumitomo Chemical Co., Ltd.) is attached in the same axial direction as the original polarizing plate. Attached to its adhesive layer Further, the light incident side polarizing plate is peeled off, and the polarizing plate with the adhesive layer prepared in the above is peeled off from the separator to be attached to the same axial direction as the original polarizing plate instead of the light incident side polarizing plate. On the side of the adhesive layer (the absorption axis of the polarizing film and the axis direction of the retardation axis extending the polyethylene terephthalate film and the longitudinal direction of the panel) β, then the liquid crystal display device is disposed in the backlight The optical sheet members on the diffusion plate of the source are all removed, and the above-mentioned (Α) diffusion film is disposed in place of the optical sheet members. Thereby, the retardation axis of the diffusion film is formed to be extended with respect to the light incident side polarizing plate. The deviation angle (axial deviation angle) of the retardation axis of the bismuth phthalate film was 0. The liquid crystal display device. The liquid crystal display device obtained was visually observed, and as a result, the uneven color unevenness (interference unevenness) was weak, and the visibility was good. <Example 2> A shaft deviation angle of 30 was produced in the same manner as in Example 除 except that the above-mentioned (Β) diffusion film was used. Liquid crystal display device. The liquid crystal display device of 151S81.doc •58· 201128268 was obtained by visual observation, and the results were a and . The oblique color of the 妒 is visually identifiable. y g (interference unevenness) is weak, <Example 3> In addition to the diffusion of the above (C), the axis deviation angle was 45. ^ The same manner as in package example 1 < crystal display device. The liquid crystal display device of the head. a| 4, the surname must be obtained from a survey, 罝, ,. (4) ^ Good visual recognition. Ding/step unevenness is weak, <Example 4> The axis deviation angle was 6 in the case of 盥. . Liquid crystal display device: V: The method of obtaining the liquid crystal display device's result of the oblique color:: Obtained: weaker, good visibility. ~Uneven) Relative <Comparative Example 1 > A shaft misalignment angle of 70 was produced in addition to the diffusion film of the above (8). Liquid crystal display device. ? "The same way liquid crystal display device, social fruit # " measurement observation obtained ',. Color unevenness in the oblique direction (interferential visual recognition is not good. 7 + average) reluctance, <Example 5> In addition to the use of extended poly-p-dimethyl hydrazine 4 ΛΛΛ • Ethylene glycol film (in-plane phase difference, The axis deviation angle was 〇 in the same manner as in Example 1 except that the 4 〇〇〇 nm ' Νζ coefficient was 1 8) and the δ was used as the light source side protective film of the polarizing film. The liquid crystal display device. The liquid crystal display device obtained was visually observed, and as a result, the color unevenness (interference unevenness) in the oblique direction was weak, and the visibility was good. <Example 6 > 151581.doc -59· 201128268 In addition to the use of the above (B) money m, (4) implementation (4) The production axis deviation angle is 30. The LCD display is equipped with two LCD screens, and the visual recognition is good. The interference unevenness is weak. <Example 7> The axis deviation angle is 45 in the same manner as in Example 5 except that the diffusion film of the above (C) is used. Liquid crystal display device. When visual observation was performed, the result of b ", the device" was obliquely observed (dry visibility was good. <Example 8> In the same manner as in Example 5 except that the diffusion film of the above (D) was used A liquid crystal display device having an axis deviation angle of 60 was produced. The liquid crystal display device obtained by visual observation showed that the color unevenness (interference unevenness) in the oblique direction was relatively weak, and the visibility was good. <Comparative Example 2> Except for use A liquid crystal display device having a shaft misalignment angle of 70 was produced in the same manner as in Example 5 except for the diffusion film of the above (E). The liquid crystal display device obtained by visual observation showed uneven color unevenness (interference unevenness). Strong, poor visual recognition. For each case, the deviation angle of the retardation axis of the diffusion film with respect to the retardation axis of the extended polyethylene terephthalate film in the light incident side polarizing plate and the test results are summarized. In Table 1. The axis deviation angle in 纟1 indicates the deviation angle of the slow phase axis of the diffusion film in the night crystal display device with respect to the retardation axis of the extended polyethylene terephthalate film on the light incident side polarizing plate. 151581.doc •60· 201128268 [Table i] Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Example 5 Example 6 Example 7 Example 8 Comparative Example 2 Axis deviation angle η 0 30 45 60 70 0 30 45 60 70 The coefficient of the light source side protective film 7.0 7.0 7.0 7.0 7.0 1.8 1.8 1.8 1.8 1.8 The uneven intensity is weaker, weaker, weaker, weaker, weaker, weaker, weaker, weaker, weaker, stronger, as shown in Table 1. The axis deviation angle shown is 60. The following examples 1 to 8 show that the color unevenness in the liquid crystal display device is weak and the visibility is excellent. On the other hand, the axis deviation angle is higher than 6 〇. 1 and 2 are not uniform in color. 'The visual recognition is not good. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a shaving surface of an example of a layer configuration of a liquid crystal display device of the present invention. [Description of main components] 10 faces Light source 11 Reflecting plate 12 Optical sheet member 20 Backlight 30 Light incident side polarizing plate 31, 41 Polarizing film 32 Light source side protective film 33, 43 Unit side protective film or optical compensation film 34' 44 Adhesive layer 40 Light exit side polarizing plate 151581.doc -61 - 201128268 42 Protective film 50 Liquid crystal cell 60 Light incident side polarizing plate with adhesive layer 70 Light exit side polarizing plate with adhesive layer 80 Liquid crystal panel 151581.doc •62·

Claims

201128268 VII. Patent application scope: 1. A liquid crystal display device comprising a backlight and a liquid crystal panel disposed on the backlight, wherein the liquid crystal panel comprises a liquid crystal unit and a polarizing plate attached to both sides of the liquid crystal unit Among the polarizing plates, the light incident side polarizing plate disposed on the backlight side of the liquid crystal cell has a polarizing film containing a polyvinyl alcohol resin and a light source side having an optical anisotropy laminated on the backlight side of the polarizing film. a protective film, wherein the backlight includes a direct-type or side-light type surface light source, and an optically anisotropic optical sheet member disposed at a position closest to the liquid crystal panel, and the late phase of the light source side protective film The light source side protective film and the optical sheet member are disposed such that the angle between the shaft and the retardation axis of the optical sheet member is 6 G or less. 2. The liquid crystal display device of the present invention, wherein the phase difference in the plane of the light source side protective film is 200 nm or more. 3. The liquid crystal display device of claim 4, wherein the light source side protective film is an extended polyethylene terephthalate film. The liquid crystal display device of claim 1 or 2, wherein the optical sheet member is selected from the group consisting of a diffusion film, a microlens film, and a lens sheet. 5. The liquid crystal display device of claim 1 or 2, wherein The refractive index in the direction of the retardation axis in the plane is set to 〜, and the square ratio orthogonal to the slow phase axis is ny, and the refractive index in the thickness direction is ～, the light source side is J51581.doc 201128268 The protective film has a Nz coefficient of 4 or more or less than 2, which is represented by (nx-nz) / (nx_ny). 6. The liquid crystal display device of claim 1 or 2, wherein the phase difference of the optical sheet member in the plane An optical member group for use in a liquid crystal display device including a liquid crystal cell and a backlight, comprising: a light incident side disposed on the backlight side of the liquid crystal cell a polarizing plate; and an optical sheet member having an optical anisotropy disposed at a position closest to the liquid crystal cell of the backlight; the light incident side polarizing plate has a polarizing film containing a polyvinyl alcohol resin, and is laminated on Above When the light source side protective film having optical anisotropy on one side of the light film is used in a liquid crystal display device, the light incident side polarizing plate is disposed such that the light source side protective film becomes the backlight side, and The retardation axis of the light source side protective film is at an angle of 60 with respect to the optical sheet member and the slow axis. The light source side protective film and the optical sheet member are disposed in the following manner. 8. The optical member group according to claim 7, The phase difference in the plane of the above-mentioned light source side protective film in the crucible is 200 nm or more. 9. 10. 11. The optical member group of the item 7 or 8 wherein the above-mentioned light source side protective film is an extended poly(p-dibenzoic acid) The optical member group of claim 7 or 8, wherein the optical sheet member is selected from the group consisting of a diffusion film, a microlens film, and a lens sheet. The optical member group of claim 7 or 8 The refractive index of the in-plane retardation axis direction 151581.doc 201128268 is set to nx 'the in-plane and the set to ny', and the refractive index of the thickness direction is represented by (nx-nz)/(nx_ny) up to 2. Refractive index in the direction orthogonal to the phase axis When the ratio is set to nz, the Nz coefficient of the light source side is 4 or more, or 12. The optical member group of claim 7 or 8, wherein the phase difference of the optical sheet member in the plane is 1000 nm or more. .doc