200903053 九、發明說明： " 【發明所屬之技術領域】 ' 本發明係關於一種光學複合膜，尤其涉及一種改變液晶顯示裝置出射 光偏振狀態之光學複合膜及使用該光學複合膜之液晶顯示裝置。 【先前技術】 隨著液晶技術不停發展，液晶顯示器得到廣泛應用，從液晶手錶出現 起始，液晶顯示於電子時代即扮演相當重要之角色。相繼出現具液晶顯示 功能之便檇式電話、遊戲機、電子辭典、攝像機、數位相機、可視電話， 乃至筆5己本電腦、監視器、液晶電視等。特別係近年來，於電視與個人電 腦領域，液晶顯示器已逐步取代CRT顯示，漸成為市場之主流。 隨著資訊化發展，人們對資訊獲取需求越來越強烈，白天辦公需要使 用個人電腦，晚上看電視或利用個人電腦從網上獲取資訊，因此，人們將 會花費大量時間面對液晶顯示裝置，特別係個人電腦、液晶電視。 凊參閱圖ΙΑ、1B所示之液晶顯示器結構示意圖，液晶顯示器係將兩塊 帶透明電極102 ’ 104之玻璃基板用數微米直徑之玻璃珠或塑膠珠隔墊，邊 緣用膠固定，注入扭曲向列相液晶13〇 ’液晶於上下基板之間扭曲9〇度， 上下基板外側附著兩片光軸互相垂直之偏振片11〇，12〇。上側偏振片12〇 光軸（平行於紙面）與上側基板處液晶取向平行，下側偏振片11〇光軸（垂 直於紙面）與下側基板處液晶取向平行。自然光自下基板至上基板入射液 晶屏，不加電場時光線通過下側偏振片11〇變為垂直下基板處液晶取向之 偏振光，偏振光被液晶層旋光，轉過9〇。後正好與上基板處偏振片之光軸相 200903053 平行，可以透過，作為顯示器之亮態，如圖1A所示；加電場時液晶分子⑽ 沿電場方向豎起，原絲曲制縣妓平行侧，驗光射直排列之 液晶不作用，透過下偏振片m之偏振光通過液晶層時偏振面不再發生旋 轉’到達出射端之偏振片120 a夺’偏光軸與出射光之偏振方向垂直，光被 截止’呈現暗態，如圖1B所示。如果電場不特職，紅分子處於半登立 狀態’旋光侧亦處於半完全狀態’則會有部分光透過，呈現中間灰度， 係液晶顯示ϋ工作之顧。從液晶顯示紅作顧可知，現有之液晶顯示 器出射光係一種線偏振光。 除了這種扭曲向列相液晶外，液晶還有展曲、彎曲等畸變特性，不同 畸變特性職於液晶之不嶋示模式，，不關示模式基柄理與上述 扭曲向列相液晶顯示原理類似，即通過液晶分子之排列改變光線之偏振方 向以實現顯示，而最終出射之光線係線偏振光。 與線偏振光不同，自然光於各個方向上之向量係均勻分佈，該均勻分 佈之自然光對人眼感光細胞刺激係各向同性，人眼習慣於適應自然光。圓 偏振光同係一種偏振光，但由於圓偏振光之向量方向係快速旋轉，於一定 時間週期《表現為各向同性，與自然光最為接近。姚偏振光相比，人 眼觀看圓偏振光則相對較為舒適。 因此，改變現有液晶顯示器之出射光偏振狀態，對於降低人們視覺疲 勞具有十分重要之意義。 有蓉於此’提供一種改變液晶顯示裝置出射光之偏振狀態之光學元件 實為必要。 200903053 【發明内容】 本發明之-目的係提供—種改變液晶顯示裝置出射光偏振狀態之光學 • 複合膜。 本發明之另-目的係提供-種具改變㈣光偏振態之液晶顯示裝置。 本發明所揭7F-種可改變偏振光狀態之光學複合膜，設置於液晶盒出 射光-側，所述光學複合膜延液晶顯示器之光出射方向依次包括一偏光層 及相位補償層。所述光學複合顧於將液晶齡裝置之ώ射光由線偏振光 變成圓偏振光或橢圓偏振光出射，以降低消費者之視覺疲勞。 本發明同時還提供-種液晶顯稀置，其巾，該液晶顯示裝置主要包 括.-第-基板與第二基板；-密封於該第一基板與該第二基板兩内側面 之間之液晶層，形成液晶盒；-配置於該第—基板糊面之—線偏光板， 光線經該第-線偏光板之後進人液晶層；及—配置於該第二基板外侧面之 -透光部件，所述透光部件實現由液晶盒出射之光線經該部件後轉變為圓 偏振光或橢圓偏振光出射；更具體地，所述偏光層係一偏光片；更具體地， 所述光學複合膜於相位補償層外側進-步包括一表面處理層；更具體地， 所述光學複合膜於偏光層外側進一步包括一相位補償層； 與先前技術相比較，本發明提供之光學複合膜及液晶顯示裝置具有以 下有益效果.由於本發明之光學複合膜具改變液晶顯示裝置出射光之偏振 狀態’以及液晶顯示裝置安裝具有波長補償功能之光學複合膜，從而可改 變液晶顯示裝置之線偏振出射光為圓偏振光出射光或侧偏振光出射光， 有利於降低消費者視覺疲勞。 200903053 【實施方式】 /月併相第二圖至第四圖，為了能獲取出射光為線偏振光或橢圓偏 振光狀叙液晶顯稀置，—較為鮮方式係通過液晶顯示裝置出射光偏 振片120之外側貼有人/4相位補償膜15，所述相位補償膜15為光學薄膜， 可提供相位補償魏，波長λ顧通常於可見光範圍内，即波長又處於 380〜760nm之間。所述補償膜15之相位補償值為μ，即延遲厚度為 14〇咖且通過粘著劑13粘著於出射光偏振片120上。所述補償膜15外還 钻有保護膜17。補償膜15直接枯附出射光偏振>1 120上，無需其他附加元 件’能使得液晶顯示裝置之㈣光躲偏振歧_偏振光，實現成本較 低。 從出射光偏振片120出射之偏振光吸收軸與相位補償膜15延遲光軸成 45度角，因相位補償膜u之相位延遲值為^/2，故可將從出射光偏振片 120出射之線偏振光轉換成圓偏振光。此種結論可依據以下原理所得： 假攻入射到波長延遲片（即補償膜16)上之線偏振光具有確定之振動 面（如圖7)，振動面之X軸和Υ軸的電向量可表示為： \Ex=axcos{mt + 9x) \Ey=aycos(at + Vy) I卜1 ) 其中，A係入射光之振幅，ω係角頻率，φ係相位角，λ係光之波長。並 且： ax =^lcosa a =^4 sin α , (1-2) 令： 200903053 T — cot (1-3) 則式（1-1)可改為： E„ :cos τ cos - sin τ sin ：cos τ cos φγ - sm τ sm φγ (1-4) 令： (1-5) δ = φγ-φχ 其中，δ為入射光於X軸和Y軸分量之位相差 則有： Ε . Εν —sm<p - —5ΐηφχ = cost sin5 ay Ex cos φ - Ey =sin τ sin 5 ^cos 队= 4 (1-6) 將式（1-6)方程兩邊分別平方然後相加則得： Ε, \2 Ε, \2 αχ a', 2ExEy a^ay cos 5 = sin2 5 (1-7) 由式（1-7)垂直振動合成之軌跡方程，當位相差δ=±π/2時，得到式（1-8 ) 軌跡方程： 、2 〜、2 (1-8) 若= Α，則式（丨―8)變為圓之方程。由此，一束線偏振光入射到厚 度為d波晶片上，出射光係圓偏振條件為： δ 1) &和&之間之位相差 2ττ 5= — (n~nx)d 由於 λ 係由波晶片本身 200903053 - 引起，所以選用；1/4延遲片。 - e e 之振幅 y，假疋入射線偏振光之振幅為a，其振動方向與 • X軸之夾角為《，則^ ，^si气要使^，必須α=45度。 總之，令-束線鎌光通過輯厚度為λ/4波長奇數倍之相位補償 膜’而且延遲厚度為又/4波長奇數倍之相位補償膜之延遲光軸與出射光之 偏振方向成45度角時，可以得到一束圓偏振光。 由此可知，於出射光偏振片12Q上貼有λ/4相位補償膜15，且相位補 侦膜15與入射光成45度角，即可得圓偏振光。 為了更好產業應用，實用何以將前述方式中之出射光偏振片12〇與 ”上所貼有；1/4相位補触15整合為一個整體，成為一個能同時實現偏光 與相位補^魏絲複合膜，該光學複合膜係—個全新透光部件，將該透 光部件設置於液晶盒出射光—側，能使液晶顯示裝置實襲魅光或擴圓 偏振光出射，將有利於改善人眼視覺疲勞。 請參閱第五®所示朗時實現偏光與她補償功能之光學複合膜加結 構示意圖，該絲複合膜通過兩轉層23、25崎三騎料，各層材料之 功能分述如下，處於底層之偏光層24實現偏光功能，常用係一個偏光片； 處於中間位㈣她補償層26主要實現她爾功能，—般採用λ/4相位 補償片’用於液晶裝置中，相位補償層26之相位補償值一個較佳值係冗/2, 即延遲厚度係140mn，該相位補償層26之材料可能採用具有雙折射特性的 %稀炫聚合物（Cyci。Olefins P〇lymer，CGP)膜，簡稱〇)P，採用雙軸拉 伸、有雙折射特性三醋酸纖維素（N_TAC)膜，簡稱N TAC，或係採用單軸 200903053 拉伸三醋酸纖維素、同時塗布聚齡胺（PI)材卿成之具有雙折射特性 膜等’相位補償層26之延遲光軸與偏光層24之偏振方向優選45度角。處 於最上層絲面處理層28，主要起_個防護功能，最如係-層·膜， 可通過增加抗喊、抗反_理，讀錄幕在外界絲魏下的圖像品 質。此外，為了便於工業生產，方便光學複合膜2〇與液晶盒之枯貼，通常 偏光層24之外側面還塗覆有一層粘膠層（圖未示）。 使用中光千複合膜2〇係置於液晶盒出射光一側，通過液晶層之線偏 振光經光學複合膜20之偏光層24實現絲之通過触止，進行圖像顯示， 再經過相位補償層26之後變成圓偏振城橢圓偏振光經表面處理層汾出 射，從而能實現人眼觀看狀液晶圖像係圓偏振光或_偏振光。 2004年9月22日，中國大陸專利公開號為CN 153〇72〇A公開了名為“使 用圓偏振光之多顯示域垂直配向型之液晶顯示器”揭示了—種新液晶顯示 器結構’簡述之’即於兩偏光片與液晶層之間分別增加—層相位補償片， 使原先液晶顯不H中以線偏振光通過液晶層轉變為圓偏振級過液晶層， 以解決現有液晶顯示器之漏光及顏色偏移問題，為了進一步適應該類液晶 顯示器使用需求’可以將本發明之光學複合膜2G與出射光—側之相位補償 膜進一步整合，形成一個新光學複合膜30，如第六圖所示，即將光學複合 膜20之偏光層24外側面通粘膠層21再粘貼一層相位補償層22,該相位補 償層之相關參數與液晶盒人射光-側設置之相位補償層的參數相適配，詳 細參數配合情況請參閱前述公開號為CN 1530720A之專利，從而使得新光 學複合膜30於使用過程中能沿光線行進方向同時實現相位補償、偏光、再 200903053 相位補償，形成一具多功能之光學複合膜。 m述兩光學複合膜2〇、3〇係採用粘膠層將各功能材料層粘結在一起， 從而使得本發明之光學複合膜2Q、3G相比現有之液晶顯示器要多增加一相 位補彳員層28，一定程度上影響透光率，考濾到兩光學複合膜2〇、3〇中偏光 層24係個偏光片，該偏光片係由兩光學各向同性之三醋酸纖維素 TAC)層244、246中間夾-層偏光薄膜材料245，第七晒示，常用之偏光 材料245係利用峨染色之聚乙晞醇（p〇iyvinyl Aic〇h〇i，pva)薄膜，簡 稱PVA。由於pva易於吸潮、易變形，極不穩定，因此，用pVA材料做偏光 片’通常需要做成三明治結構，中間係一層pvA材料，兩邊各—層基底材 料TAC，以起保護作用。 本發明光學複合膜20巾，偏光片24 -侧有她補償層26，相位補償 層26可以採用雙轴拉伸、有雙折射特性三醋酸纖維素（n_tac)膜，而㈣c 除具有相位補償功能之外’還具有N⑽al TAC材料於—般偏光片中起到基 底與保護作用，因此，可以將本發明絲複合膜2〇中偏光層24之一層保 護材料N〇rmal TAC省去，形成一種新的光學複合膜4〇，第八圖所示，按使 用中光線行進方向依次包括基底層244，材料係N〇rmai TAC，偏光層245， 材料係PVA，相位補償層26，材料係N_TAC ’枯膠層25及表面處理層28， 在此再補充說明一下相位補償層26材料除了 N_TAC之外，還可以用c〇p或 係採用單軸拉伸三纖維素、同時塗布輯亞胺（⑴材料形成具有雙 折射特性之膜。 按同樣原理，本發明光學複麵3Q，可以進行進—步改進，—係可以 12 200903053 於光«合膜2G之基礎上進行岐，絲學複麵2q之錢層μ最外層 -之基底材料N贿i TAC直接替換成隱、⑽膜或採用單轴拉伸三奸酸 •纖維素、同時塗布聚醯亞胺（PI)材料形成之具有雙折射特性膜即可實現， 相比原來光學複合膜30省去了 _ 21及偏光片24之一層基底材細。 另-種更為_結_於鱗複錢4G之基礎场減進，料學複合膜 40之基底層244材料Normal TAC直接替換成MAC、c〇p膜或採用單轴拉 伸三醋酸纖維素、同時塗布聚醯亞胺（ρι)材料形成具有雙折射特性之膜 即可實現’從而形成-種新光學複合膜6〇，如第九圖所示，按使用過程中 的光線方向依次包括相位補償膜22，偏光材料pVA層挪，及相位補償層 26，钻膠層25及表面處理層28，各功能層之材料如前所述，再此不再資述。 如月ii述之本發明光學複合膜20 ' 30、4G、60 Ή目位補償層26係採用 四分之-波片，其相位補償值優選π/2，即延遲厚度14〇簡，為對可見光 波長進行更好補償’絲複合膜2G、3G、4G、6G巾相位補儲％可以採 用又/2補償膜與；1/4補償膜形成之波長補償片組合，現以光學複合膜即 結構為例說明，將光學複合膜6〇中相位補償層26與偏光材料pvA層挪 之間通過钻膠層27再增加-層又/2補償膜26a，形成第十圖所示複合補償 膜70，其他光學複合獏20、3〇、4〇也可以同樣的方式增加一層λ/2補償 膜26a ’在此不再--贅述。 其中’ λ/2補償膜26a之延遲光軸若與偏光層之偏振方向失角為0， 所述λ /4補償膜26之延遲光軸與偏光層之偏振方向夾角為2 0 +45。或2 0 +135°，其中，Θ的變化範圍在0〜90。之間。所述λ/2補償膜26a及;1/4補 13 200903053 償膜26延遲厚度值分別優選為270nm及i40nm。因此可以將液晶顯示器出 射光由線偏振光轉換成圓偏振光和橢圓偏振光。 請再次參閱第十一圖及第十二圖，從液晶顯示器出射偏振光的偏振方 向與λ/2補償膜26a之延遲光軸夾角為β，λ/2補償膜26a之延遲光軸與 λ/4補償膜26之延遲光軸夹角為2Θ+45。。本發明光學複合膜中，通使用 採用λ/2補償膜26a與λ/4補償膜26的相位延遲片組合，可以對可見光 波長進行更好的補償效果。 複合膜20、30、40、60除了前述方法實現之外，還可以通過晶體分層 生長方式實現，如圖13所示，具改變偏振光狀態部件8〇，由基材犯，偏 光層84 ’相位補償層86等三部分構成。各部分功能福述和組成結構如下： 基材82可以係光學各向同性的透明基材，例如N〇rmal TAC或玻璃基板等 材料’或者係具有相位補償功能特性的光學基材，例如N-TAC、C0P等材料。 偏光層84騎過晶體生長技術’在基材丨表面生長具有線偏振特性之光學 曰曰體層。相位補償層3亦採用晶體生長技術，於偏光晶體層2表面生長另 層具有雙折射特性之光學晶體層，例如訊酸紀和氟化鎂等光學晶體層。 通過控制絲條件，實舰遲光軸之方向與偏光晶縣2之魏光轴方向 夾角為45。，同時控制生長厚度，使相位延遲值為，即延遲厚度為⑽盼 申請人對本㈣提㈣_實施舰行了試驗驗證。 實驗1 : ^ _2台32英寸液晶電視，-台加λ/4延遲片…台不作處理。讓受 喊者分別於上述兩種電視上連續觀看講電視節目⑽分鐘内，每隔如分 14 200903053 鐘進行-次視力的檢測。兩種情況下電視最高亮度都設置為脱綱。樣 本為分為少年組、青社、中社嚇組三她，其中，少年組年齡分 佈8〜丨8歲、青年組年齡分佈19〜35歲、中年組年齡分佈㈣歲、老年 組年齡分佈55歲以上’各抽取了 1G人、即總共4G人進行了對比試驗。 實驗結果請參閱第十四圖，曲線B係觀看常規液晶電視受檢者之視力 平均值隨觀看_之變化曲線；鱗A係觀看加1/4延則液 受試 者之視力平驗醜看時_«線。常規液晶、加1/4延遲片兩種 情況下，觀看_節目之視力隨觀看_長短都有獨程度下降。對比來 看，觀看半小時以後，兩種情況暫時性視力都有不同程度下降。加上ι/4 延遲片相對常規液晶電視，觀看者視力下降幅度峨少，對保護觀看者視 力有幫助。 實驗2 : 本人實驗利用眨眼頻率來評價視覺疲勞。實驗中使用2台犯英寸的液 ” ' 。加1/4延遲片，一台不作處理。受檢者被隨機分成兩組，分 別用上述兩種魏觀看節目⑽分鐘。錢檢者觀看電視的雕中，用眼 包圖（E0G)記錄儀監測其眨眼頻率。觀察受檢者觀看電視過程中的眨眼頻 率欠化可反映出党檢者視覺疲勞情況。本次實驗共完成79人次LCD-TV 觀看實驗與資料記錄。 將又檢者於各時間點上之眨眼次數轉變為眨眼頻率（次/秒），益求平 均後列表如下： 表·文檢者在各時間點上的眨眼頻率（次/秒） 15 200903053200903053 IX. Invention: " [Technical Field of the Invention] The present invention relates to an optical composite film, and more particularly to an optical composite film for changing the polarization state of light emitted from a liquid crystal display device and a liquid crystal display device using the same . [Prior Art] With the continuous development of liquid crystal technology, liquid crystal displays have been widely used. From the appearance of liquid crystal watches, liquid crystal displays play a very important role in the electronic age. There have been portable telephones, game consoles, electronic dictionaries, video cameras, digital cameras, videophones, and even pens, computers, monitors, and LCD TVs. In particular, in recent years, in the field of television and personal computers, liquid crystal displays have gradually replaced CRT displays, and have gradually become the mainstream of the market. With the development of information technology, people have more and more demand for information acquisition. During the daytime, they need to use a personal computer to watch TV at night or use a personal computer to obtain information from the Internet. Therefore, people will spend a lot of time facing the liquid crystal display device. Especially for personal computers, LCD TVs. Referring to the structural diagram of the liquid crystal display shown in FIG. 1 and FIG. 1B, the liquid crystal display uses two glass substrates with transparent electrodes 102'104 to be separated by glass beads or plastic beads of several micrometer diameter, and the edges are fixed by glue, and the twisting direction is injected. The liquid crystal of the liquid crystal 13〇' liquid crystal is twisted by 9 degrees between the upper and lower substrates, and two polarizing plates 11〇, 12〇 whose optical axes are perpendicular to each other are attached to the outer side of the upper and lower substrates. The upper polarizing plate 12 has an optical axis (parallel to the paper surface) parallel to the liquid crystal orientation at the upper substrate, and the lower polarizing plate 11 has a pupil axis (shoring to the paper surface) parallel to the liquid crystal orientation at the lower substrate. The natural light enters the liquid crystal screen from the lower substrate to the upper substrate. When no electric field is applied, the light passes through the lower polarizing plate 11 and becomes polarized light of the liquid crystal orientation at the vertical lower substrate, and the polarized light is rotated by the liquid crystal layer and rotated by 9 turns. It is just parallel with the optical axis phase 200903053 of the polarizing plate at the upper substrate, and can be transmitted as the bright state of the display, as shown in Fig. 1A; when the electric field is applied, the liquid crystal molecules (10) are erected along the direction of the electric field, and the original filament is calibrated to the parallel side of the county. The liquid crystal in which the optometry is arranged directly does not function. When the polarized light passing through the lower polarizing plate m passes through the liquid crystal layer, the polarization plane no longer rotates. The polarizing plate 120A that reaches the exit end is perpendicular to the polarization direction of the outgoing light. It is cut off to present a dark state, as shown in Figure 1B. If the electric field is not special, the red molecule is in the semi-standing state, and the optical rotation side is also in the semi-complete state. Then some of the light is transmitted, showing the intermediate gray scale, which is the liquid crystal display. It is known from the liquid crystal display that the existing liquid crystal display is a linearly polarized light. In addition to this twisted nematic liquid crystal, the liquid crystal also has distortion characteristics such as splaying and bending, and different distortion characteristics are used in the liquid crystal display mode, and the mode base handle and the above twisted nematic liquid crystal display principle are not shown. Similarly, the polarization direction of the light is changed by the arrangement of the liquid crystal molecules to achieve display, and the finally emitted light is linearly polarized. Unlike linearly polarized light, the natural light is evenly distributed in all directions. The evenly distributed natural light is isotropic to the human eye photoreceptor cell, and the human eye is accustomed to adapting to natural light. Circularly polarized light is a kind of polarized light, but since the vector direction of circularly polarized light is rapidly rotating, it exhibits isotropic in a certain period of time, and is closest to natural light. Compared with Yao polarized light, it is relatively comfortable to see circularly polarized light. Therefore, changing the polarization state of the outgoing light of the existing liquid crystal display is of great significance for reducing people's visual fatigue. It is necessary to provide an optical component that changes the polarization state of the light emitted from the liquid crystal display device. SUMMARY OF THE INVENTION The object of the present invention is to provide an optical composite film which changes the polarization state of light emitted from a liquid crystal display device. Another object of the present invention is to provide a liquid crystal display device having a modified (four) optical polarization state. The optical composite film of the present invention, which can change the state of the polarized light, is disposed on the light-emitting side of the liquid crystal cell, and the optical composite film extends the light-emitting direction of the liquid crystal display to include a polarizing layer and a phase compensation layer. The optical compound is such that the pupil light of the liquid crystal age device is converted from linearly polarized light into circularly polarized light or elliptically polarized light to reduce visual fatigue of the consumer. The invention also provides a liquid crystal display device, the liquid crystal display device mainly comprises: a first substrate and a second substrate; and a liquid crystal sealed between the inner surfaces of the first substrate and the second substrate a layer forming a liquid crystal cell; a line polarizing plate disposed on the first substrate paste surface, the light entering the liquid crystal layer after passing through the first line polarizing plate; and a light transmitting member disposed on an outer side surface of the second substrate The light transmissive member converts light emitted from the liquid crystal cell into circularly polarized light or elliptically polarized light through the component; more specifically, the polarizing layer is a polarizer; more specifically, the optical composite film Further comprising a surface treatment layer on the outer side of the phase compensation layer; more specifically, the optical composite film further comprises a phase compensation layer on the outer side of the polarizing layer; the optical composite film and the liquid crystal display provided by the invention are compared with the prior art The device has the following beneficial effects. Since the optical composite film of the present invention changes the polarization state of the light emitted from the liquid crystal display device, and the liquid crystal display device is mounted with an optical composite film having a wavelength compensation function, It can be changed while the liquid crystal display device of the line light is polarized emitted light or circularly polarized light exiting side polarized light, help to reduce visual fatigue consumer. 200903053 [Embodiment] / month and phase 2 to 4, in order to obtain the emitted light as linearly polarized light or elliptically polarized light, the liquid crystal is thinned, and the fresher method is to emit the light polarizing plate through the liquid crystal display device. The outer side of the 120 is attached with a human/4 phase compensation film 15, which is an optical film, which provides phase compensation, and the wavelength λ is generally in the visible range, that is, the wavelength is between 380 and 760 nm. The phase compensation value of the compensation film 15 is μ, that is, the retardation thickness is 14 Å and is adhered to the outgoing light polarizing plate 120 by the adhesive 13. A protective film 17 is also drilled outside the compensation film 15. The compensation film 15 is directly adhered to the light-emitting polarization > 1 120, and the other components are not required to make the liquid crystal display device (40) light-polarized-polarized light, which is low in cost. The polarization absorption axis emitted from the outgoing light polarizing plate 120 and the phase compensation film 15 are at an angle of 45 degrees with respect to the optical axis. Since the phase retardation value of the phase compensation film u is ^/2, it can be emitted from the outgoing light polarizing plate 120. Linearly polarized light is converted into circularly polarized light. This conclusion can be obtained according to the following principle: The linearly polarized light incident on the wavelength retarder (ie, the compensation film 16) has a certain vibration plane (as shown in FIG. 7), and the electric energy of the X-axis and the x-axis of the vibration surface can be obtained. Expressed as: \Ex=axcos{mt + 9x) \Ey=aycos(at + Vy) Ib 1) where A is the amplitude of incident light, ω is the angular frequency, φ is the phase angle, and λ is the wavelength of the light. And: ax =^lcosa a =^4 sin α , (1-2) Order: 200903053 T — cot (1-3) Equation (1-1) can be changed to: E„ :cos τ cos - sin τ sin :cos τ cos φγ - sm τ sm φγ (1-4) Let: (1-5) δ = φγ-φχ where δ is the difference between the X-axis and Y-axis components of the incident light: Ε . Ε — — Sm<p - —5ΐηφχ = cost sin5 ay Ex cos φ - Ey =sin τ sin 5 ^cos Team = 4 (1-6) Square the two sides of equation (1-6) and add them together: Ε, \ 2 Ε, \2 αχ a', 2ExEy a^ay cos 5 = sin2 5 (1-7) The trajectory equation synthesized by the vertical vibration of equation (1-7), when the phase difference is δ=±π/2, the expression is obtained. (1-8) Trajectory equation: , 2~, 2 (1-8) If = Α, the equation (丨-8) becomes the equation of the circle. Thus, a bundle of linearly polarized light is incident on the wafer of thickness d The circular polarization condition of the outgoing light system is: δ 1) & and the phase difference between the & 2ττ 5= — (n~nx)d Since the λ system is caused by the wave wafer itself 200903053 -, it is selected; Delay piece - amplitude y of ee, the amplitude of the pseudo-intrusion ray polarized light is a, the angle between the vibration direction and the X axis ", then ^, ^si gas to make ^, must be α = 45 degrees. In short, let-beam ray light through the thickness of the λ / 4 wavelength odd-numbered phase compensation film 'and delay thickness is /4 wavelength When the retardation optical axis of the odd-numbered phase compensation film is at an angle of 45 degrees with the polarization direction of the outgoing light, a circularly polarized light can be obtained. Thus, it is known that a λ/4 phase compensation film is attached to the outgoing light polarizing plate 12Q. 15, and the phase compensation film 15 is at a 45-degree angle with the incident light, so that circularly polarized light can be obtained. For better industrial application, how to use the light-emitting polarizing plate 12 〇 and "on the above"; The /4 phase complement 15 is integrated into a whole, and becomes a composite film capable of simultaneously achieving polarization and phase compensation. The optical composite film is a brand new transparent component, and the transparent component is disposed in the liquid crystal box to emit light. On the side, the liquid crystal display device can be used to illuminate the enchantment or expand the polarized light, which will help improve the visual fatigue of the human eye. Please refer to the optical composite film plus structure diagram of Polarization and her compensation function shown in the fifth edition. The silk composite membrane passes through two layers 23 and 25, and the functions of each layer are as follows. The polarizing layer 24 realizes a polarizing function, and is commonly used as a polarizing plate; in the middle position (4), the compensation layer 26 mainly realizes the Herr function, and the λ/4 phase compensation sheet is generally used in the liquid crystal device, and the phase compensation layer 26 is phase compensated. A value of a preferred value is /2, that is, a retardation thickness of 140 mn, and the material of the phase compensation layer 26 may be a Cyan (Cyci. Olefins P〇lymer, CGP) film having birefringence characteristics, referred to as 〇). P, biaxially stretched, birefringent cellulose triacetate (N_TAC) film, abbreviated as N TAC, or uniaxial 200903053 stretched triacetate cellulose, coated with polyamine (PI) material The retardation optical axis of the 'phase compensation layer 26 having a birefringence characteristic film or the like and the polarization direction of the polarizing layer 24 are preferably at an angle of 45 degrees. It is located in the uppermost silk surface treatment layer 28, mainly as a protective function, most like a layer-layer film, which can improve the image quality under the external silk by increasing the anti-calling and anti-reaction. In addition, in order to facilitate industrial production, it is convenient to adhere the optical composite film 2 to the liquid crystal cell. Usually, the outer side of the polarizing layer 24 is coated with an adhesive layer (not shown). The medium-light composite film 2 is placed on the light-emitting side of the liquid crystal cell, and the linearly polarized light passing through the liquid crystal layer is passed through the polarizing layer 24 of the optical composite film 20 to perform image display, and then subjected to phase compensation. After the layer 26 is turned into circularly polarized elliptically polarized light, it is emitted through the surface treatment layer, so that the human-eye view liquid crystal image is circularly polarized or _polarized. On September 22, 2004, the Chinese Patent Publication No. CN 153〇72〇A published a liquid crystal display titled “Multiple Display Domain Vertical Alignment Type Using Circularly Polarized Light”, which revealed a new liquid crystal display structure. The 'phase-compensation sheet is added between the two polarizers and the liquid crystal layer respectively, so that the original liquid crystal is not converted into linearly polarized light through the liquid crystal layer through the liquid crystal layer to solve the light leakage of the existing liquid crystal display. And the color shift problem, in order to further adapt to the use requirements of the liquid crystal display, the optical composite film 2G of the present invention and the phase compensation film of the exit light side can be further integrated to form a new optical composite film 30, as shown in the sixth figure. It is shown that the outer surface of the polarizing layer 24 of the optical composite film 20 is adhered to the adhesive layer 21 by a phase compensation layer 22, and the relevant parameters of the phase compensation layer are matched with the parameters of the phase compensation layer of the liquid-light side of the liquid crystal cell. For detailed parameter matching, please refer to the patent of CN 1530720A, so that the new optical composite film 30 can be simultaneously in the direction of light travel during use. Phase compensation, polarization, phase compensation and then 200,903,053, forming an optical composite film of the multi-functional. The two optical composite films of the two optical composite films are bonded together by an adhesive layer, so that the optical composite film 2Q, 3G of the present invention has a more phase supplement than the existing liquid crystal display. The layer 28 affects the transmittance to a certain extent. The polarizing layer of the two optical composite films 2 〇 and 3 系 is a polarizer. The polarizer is composed of two optically isotropic triacetate TAC. The layer 244, 246 is sandwiched between the layer of polarizing film material 245, and the seventh light-emitting material 245 is a p-iyvinyl Aic〇h〇i (pva) film, which is abbreviated as PVA. Since pva is easy to absorb moisture, is easily deformed, and is extremely unstable, the use of pVA material as a polarizer usually requires a sandwich structure with a layer of pvA material in the middle and a layer of base material TAC on both sides for protection. The optical composite film 20 of the present invention has a compensation layer 26 on the side of the polarizer 24, and the phase compensation layer 26 can adopt a biaxially stretched, birefringent cellulose triacetate (n_tac) film, and (4) c has a phase compensation function. In addition, the N(10)al TAC material also serves as a substrate and a protective effect in the general polarizer. Therefore, the protective layer N〇rmal TAC of the polarizing layer 24 in the silk composite film 2 of the present invention can be omitted to form a new one. The optical composite film 4〇, shown in the eighth figure, includes a base layer 244 in order of the direction of travel of the light in use, a material system N〇rmai TAC, a polarizing layer 245, a material system PVA, a phase compensation layer 26, and a material system N_TAC The adhesive layer 25 and the surface treatment layer 28, hereby additionally, the material of the phase compensation layer 26 can be uniaxially stretched with tri-cellulose and coated with imine (1) material in addition to N_TAC. Forming a film with birefringence characteristics. According to the same principle, the optical double surface 3Q of the present invention can be further improved, and the system can be carried out on the basis of the light of the film 2G. Layer μ outermost - The base material N bribe i TAC can be directly replaced by a hidden, (10) film or a film with birefringence characteristics formed by uniaxially stretching tri-animal acid/cellulose and coated with polyimide (PI) material. Compared with the original optical composite film 30, the substrate of one layer of _ 21 and the polarizer 24 is omitted. The other type is more _ knot _ the base field reduction of the scale 4G, the base layer 244 material of the composite film 40 Normal TAC can be directly replaced with MAC, c〇p film or uniaxially stretched cellulose triacetate, and coated with polyimide film (ρι) material to form a film with birefringence characteristics to achieve 'the formation of a new optical composite The film 6〇, as shown in the ninth figure, includes a phase compensation film 22, a polarizing material pVA layer, and a phase compensation layer 26, a drill layer 25 and a surface treatment layer 28, respectively, in accordance with the direction of light in use. The materials are as described above, and will not be described again. The optical composite film of the present invention as described in the month ii 20 ' 30, 4G, 60 Ή eye compensation layer 26 is a quarter-wave plate, and the phase compensation value is preferred. π/2, that is, the delay thickness is 14 〇, which is a better compensation for the visible wavelength. The silk composite film 2G, 3G, 4G, 6G towel phase replenishment % can be combined with a /2 compensation film and a 1/4 compensation film to form a wavelength compensation sheet. Now, the optical composite film, that is, the structure, is taken as an example to illustrate the optical composite. Between the phase compensation layer 26 and the polarizing material pvA layer in the film 6〇, the layer-and-/2 compensation film 26a is further added through the drill layer 27 to form the composite compensation film 70 shown in the tenth figure, and the other optical composites 20, 3 〇, 4〇 can also add a layer of λ/2 compensation film 26a 'in this case no longer--details. Where the retardation optical axis of the λ/2 compensation film 26a is 0 with the polarization direction of the polarizing layer, The angle between the retardation optical axis of the λ /4 compensation film 26 and the polarization direction of the polarizing layer is 20 + 45. Or 2 0 + 135 °, where Θ varies from 0 to 90. between. The retardation thickness values of the λ/2 compensation film 26a and the 1/4 supplement 13 200903053 compensation film 26 are preferably 270 nm and i40 nm, respectively. Therefore, the light emitted from the liquid crystal display can be converted from linearly polarized light into circularly polarized light and elliptically polarized light. Referring again to the eleventh and twelfth drawings, the polarization direction of the polarized light emitted from the liquid crystal display and the retardation optical axis of the λ/2 compensation film 26a are β, the retardation optical axis of the λ/2 compensation film 26a and λ/ 4 The retardation optical axis of the compensation film 26 has an angle of 2 Θ +45. . In the optical composite film of the present invention, a phase retarder combination using a λ/2 compensation film 26a and a λ/4 compensation film 26 can be used to better compensate the visible light wavelength. In addition to the foregoing method, the composite film 20, 30, 40, 60 can also be realized by a crystal layer growth method, as shown in FIG. 13, with a member that changes the polarization state, and is made of a substrate, and the polarizing layer 84' The phase compensation layer 86 is composed of three parts. The functional details and composition of each part are as follows: The substrate 82 may be an optically isotropic transparent substrate, such as a material such as N〇rmal TAC or a glass substrate or an optical substrate having phase compensation functional properties, such as N- TAC, C0P and other materials. The polarizing layer 84 rides through the crystal growth technique to grow an optical colloid layer having linear polarization characteristics on the surface of the substrate. The phase compensation layer 3 also employs a crystal growth technique to grow an optical crystal layer having birefringence characteristics on the surface of the polarizing crystal layer 2, such as an optical crystal layer such as acid phase and magnesium fluoride. By controlling the wire condition, the direction of the late axis of the real ship and the direction of the Weiguang axis of the polarized crystal county 2 are 45. At the same time, the thickness of the growth is controlled so that the phase retardation value is, that is, the retardation thickness is (10). The applicant has verified the test on the ship (4). Experiment 1: ^ _2 32-inch LCD TV, - Taiwan plus λ / 4 retarder ... Taiwan is not processed. Let the caller watch the TV program continuously on the above two TVs (10 minutes), and perform the inspection of the visual acuity every time for 14 200903053. In both cases, the maximum brightness of the TV is set to off-line. The sample is divided into three groups: juvenile group, Qingshe and Zhongshe scared group. Among them, the age group of the juvenile group is 8~丨8 years old, the age group of the young group is 19~35 years old, the middle age group age distribution (four) years old, the age group distribution of the old group A comparison test was conducted for each of the 55-year-olds who took 1G, that is, a total of 4G. For the experimental results, please refer to the fourteenth graph. Curve B is the curve of the average visual acuity of the subject of the conventional LCD TV with the viewing _; the scale A is viewed with a quarter of the continuation of the subject's visual acuity. When _« line. In the case of conventional liquid crystal and 1/4 retarder, the visual acuity of the viewing_program has a degree of decline with the length of the viewing. In contrast, after half an hour of viewing, the temporary visual acuity in both cases decreased to varying degrees. Adding the ι/4 retarder to the conventional LCD TV, the viewer's vision loss is reduced, which helps protect the viewer's vision. Experiment 2: I used the blink frequency to evaluate visual fatigue. In the experiment, two liquids were used. The 1/4 retarder was added, and one was not processed. The subjects were randomly divided into two groups, and the two types of Wei were used to watch the program (10) minutes. The money examiner watched the TV. In the carving, the eye-eye chart (E0G) recorder is used to monitor the frequency of blinking. Observing the under-frequency of the blinking eye during the TV viewing of the subject can reflect the visual fatigue of the party. This experiment has completed a total of 79 LCD-TVs. Watch the experiment and data record. Change the number of blinks at each time point to the blink frequency (times/second). The average list is as follows: Table · The frequency of blinks at each time point / sec) 15 200903053
125min ----------- 觀看後 16.77 -- —- 16.55 14.80 13.36 、，、项千於蜆有過程中相對觀看、 都有下降隨後再騎變大’並且職振光組之變化幅度較圓偏振光植大 針對兩組受檢者觀看故事片前後之故眼頻率，用挪分析軟體配對 檢驗進行分析，結果如下表： 之峨鮮（平均值±標準差次/秒）125min ----------- After viewing 16.77 --- 16.55 14.80 13.36 ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The amplitude of the change was larger than that of the circularly polarized light. The frequency of the eye before and after the two films were viewed by the two subjects was analyzed by the pairing test of the Norm analysis software. The results are as follows: 峨 fresh (mean ± standard deviation / second)
分別對敝受檢者觀看故翱祕轉行輯t-檢驗後發 線偏組受檢者觀看故事>；後眨眼頻率峨看故事片前高，差異有顯著 意義（P<0. 05)，·圓偏組受檢者觀看故事片前後之政眼頻率差異無顯著意義 (P>〇. 05)。既相比傳統輸出光為線偏振光之LCD_TV電視，圓偏振光輸出 之電視能夠減輕眼睛疲勞，從而起到減輕觀看電視對人眼視疲勞之影響， 達到護眼之目的。 由上所述者僅為用以解釋本發明之較佳實施例，並非企圖據以對本發 明做任何形式上之限制，是以，凡有在相同之創作精神下所做有關本發明 之任何修飾或變更者’仍應包括在本發明意圖保護之範嘴内。 综上所述’本發明之光學複合膜及使用該光學複合膜之液晶顯示裝置 在結構設計、Μ實祕域核益上，確實找全符合產紅發展所需， 200903053 所揭露之結構創作錢具有前所未有的創新構造，所以其具有「新賴性 …無疑慮’又本發明可較之f知結敎具姐之增進，因此亦具有「進牛 性」，其完全符合麵專舰發_以__定，乃依法提起 專利申請’並敬請鈞局早日審查，並給予肯定。 【圖式簡單說明】 第ΙΑ、1B圖係液晶顯示器之結構示意圖。 第二圖係實現液晶顯示器出射光偏振片減相位補償片之結構示意圖。 第二圖係第二圖液晶顯示幕之光學示意圖。 第四圖係補償膜之延遲光軸與偏光片光軸之夹角示意圖。 第五圖係本發明實施方式丨揭示之光學複合膜結構示意圖。 第六圖係本發明實施方式2揭示之光學複合膜結構示意圖。 第七圖普通偏光片之結構示意圖。 第八圖係於第六圖揭示光學複合膜基礎上之—改進光學複合麟構示意圖。 第九圖係於第六圖揭示光學複合膜基礎上之—改進光學複合膜結構示意圖。 第十圖係第九圖所述光學複合膜採用相位補償片組合結構示意圖。 第十一圖係第十圖中所示之相位補償片組合之兩延遲光轴與偏光層之偏振 方向炎角關係圖。 第十二圖係採用相位補償組合之光學複合膜與採用又/4補償膜之光學複合 膜對可見光補償效果對比示意圖。 第十三圖係用晶體生長方式得到光學複合膜結構示意圖。 第十四圖係觀看普通液晶電視與加相位補償片之後對人眼視力影響對比圖。 17 200903053 【主要元件符號說明】 110、120-偏振片 102、104-透明電極 130-液晶分子 20、30、240、60、70—光學複合膜 17 ' 28-表面處理層 24、84-偏光層 15-相位補償膜 13、2卜23、25-粘膠材料 244 ' 246-TAC層 245-偏光材料 22、26、26a、86——相位補償層 82-基底材料 18After the t-test of the 敝 翱 观看 辑 t t t t t t t t t t t t t ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; There was no significant difference in the frequency of political eyes between the subjects in the circle and the group before and after watching the feature films (P>〇. 05). Compared with the LCD_TV TV with traditional output light being linearly polarized light, the TV with circularly polarized light output can reduce eye strain, thereby reducing the effect of watching TV on human eye fatigue and achieving eye protection. The above description is only for the purpose of explaining the preferred embodiments of the present invention, and is not intended to limit the invention in any way, so that any modifications relating to the present invention are made in the same spirit of creation. Or the changer' should still be included in the scope of the invention intended to be protected. In summary, the optical composite film of the present invention and the liquid crystal display device using the optical composite film are surely found to meet the requirements for the development of red production in the structural design and the real-life secrets, and the structure creation money disclosed in 200903053 It has an unprecedented innovative structure, so it has the "new dependence...no doubt" and the invention can be compared with the promotion of the sister-in-law, so it also has the "into the cow", which is completely in line with the special ship. __定, is to file a patent application in accordance with the law' and ask the bureau to review it early and give it affirmation. [Simple description of the diagram] The structure diagram of the liquid crystal display of the first and the first 1B is a schematic diagram. The second figure is a structural diagram of realizing a liquid crystal display emitting light polarizing plate phase-reduction compensation sheet. The second figure is an optical schematic of the liquid crystal display screen of the second figure. The fourth figure is a schematic diagram of the angle between the retardation optical axis of the compensation film and the optical axis of the polarizer. The fifth drawing is a schematic view showing the structure of an optical composite film disclosed in an embodiment of the present invention. Figure 6 is a schematic view showing the structure of an optical composite film disclosed in Embodiment 2 of the present invention. The seventh figure shows the structure of a common polarizer. The eighth figure is a schematic diagram of an improved optical composite structure based on the optical composite film disclosed in the sixth figure. The ninth figure is a schematic view showing the structure of the improved optical composite film based on the optical composite film in the sixth drawing. The tenth figure is a schematic diagram of a combined structure of phase compensation sheets for the optical composite film described in the ninth drawing. The eleventh figure is a graph showing the relationship between the two retardation optical axes of the phase compensation sheet combination shown in the tenth diagram and the polarization direction of the polarizing layer. The twelfth figure is a comparison diagram of the compensation effect of the visible light on the optical composite film using the phase compensation combination and the optical composite film using the /4 compensation film. The thirteenth image is a schematic view showing the structure of an optical composite film by crystal growth. The fourteenth figure is a comparison chart of the influence on the human eye after viewing the ordinary LCD TV and the phase compensation sheet. 17 200903053 [Description of main component symbols] 110, 120-polarizing plate 102, 104-transparent electrode 130-liquid crystal molecules 20, 30, 240, 60, 70 - optical composite film 17' 28 - surface treatment layer 24, 84 - polarizing layer 15-phase compensation film 13, 2, 23, 25-adhesive material 244 '246-TAC layer 245 - polarizing material 22, 26, 26a, 86 - phase compensation layer 82 - substrate material 18