偏(pian)(pian)(pian)光(guang)(guang)(guang)板的重要(yao)作用是將不繞(rao)極的太(tai)陽(yang)光(guang)(guang)(guang)轉化(hua)成偏(pian)(pian)(pian)流星(xing)，使垂直在靜電場光(guang)(guang)(guang)線(xian)根據LCD控(kong)制面板能(neng)正(zheng)常表明圖像。偏(pian)(pian)(pian)光(guang)(guang)(guang)膜(mo)的基本功能(neng)是讓(rang)偏(pian)(pian)(pian)光(guang)(guang)(guang)膜(mo)的太(tai)陽(yang)光(guang)(guang)(guang)變(bian)為偏(pian)(pian)(pian)光(guang)(guang)(guang)鏡(jing)。偏(pian)(pian)(pian)光(guang)(guang)(guang)膜(mo)是一種(zhong)造成檢測和偏(pian)(pian)(pian)光(guang)(guang)(guang)鏡(jing)的塊狀電子光(guang)(guang)(guang)學新型功能(neng)材料。偏(pian)(pian)(pian)光(guang)(guang)(guang)膜(mo)是一種(zhong)危害LCD顯(xian)示(shi)液晶顯(xian)示(shi)屏功效的重要(yao)部件。
偏(pian)光(guang)板是(shi)一種(zhong)非偏(pian)光(guang)鏡太(tai)陽光(guang)，造成偏(pian)光(guang)鏡，轉化成偏(pian)光(guang)鏡，再加上液晶分子扭曲特點，操縱光(guang)，提升透(tou)光(guang)度和視(shi)角(jiao)范圍，產(chan)生(sheng)防反光(guang)作(zuo)用，是(shi)上下游原料行業至關重要的商品，約為lcdtv10%的材料成本。
偏(pian)光膜(mo)按分類(lei)方(fang)式：散(san)射偏(pian)光膜(mo)反射面偏(pian)光膜(mo)半散(san)射偏(pian)光膜(mo)
偏(pian)光膜按染色方(fang)法歸類：
碘偏光膜(mo)：易得到高(gao)透過(guo)率.光學(xue)特性高(gao)，但耐高(gao)濕能力差。
染劑(ji)偏光(guang)(guang)膜：不(bu)容易(yi)得(de)到高透過率.光(guang)(guang)學(xue)特(te)性高，但耐高濕性強

偏光(guang)膜的構(gou)成(cheng)：
中(zhong)國最早的(de)(de)偏(pian)光膜主要是(shi)(shi)(shi)由正中(zhong)間造成偏(pian)光鏡(jing)PVA膜，雙面復合型(xing)(xing)TAV防護膜的(de)(de)構成。為了能(neng)使用方(fang)便和得到不同類型(xing)(xing)的(de)(de)電(dian)子光學實際效果，偏(pian)光膜經(jing)銷商應液晶顯示屏(ping)生產商的(de)(de)需求，在兩邊抹上(shang)聚氨酯樹脂，隨后(hou)抹上(shang)離型(xing)(xing)膜，這(zhe)就(jiu)是(shi)(shi)(shi)我(wo)們最常見TN一(yi)般(ban)全散射(she)偏(pian)光膜。第一(yi)次去一(yi)層離型(xing)(xing)膜，再(zai)復合型(xing)(xing)一(yi)層反(fan)射(she)膜，則是(shi)(shi)(shi)比較(jiao)常見的(de)(de)反(fan)射(she)面偏(pian)光膜。
所使用(yong)的(de)聚氨(an)酯(zhi)樹(shu)(shu)(shu)脂(zhi)是(shi)耐熱防水的(de)聚氨(an)酯(zhi)樹(shu)(shu)(shu)脂(zhi)PVA獨(du)特預浸解決(jue)（染(ran)劑(ji)產品(pin)系(xi)列(lie)），偏(pian)(pian)光(guang)(guang)(guang)(guang)膜(mo)(mo)(mo)為寬溫偏(pian)(pian)光(guang)(guang)(guang)(guang)片(pian)(pian)；在聚氨(an)酯(zhi)樹(shu)(shu)(shu)脂(zhi)中(zhong)加入避免紫外光(guang)(guang)(guang)(guang)根(gen)據成分(fen)，可做成遮擋紫外線偏(pian)(pian)光(guang)(guang)(guang)(guang)膜(mo)(mo)(mo)；在散射(she)底片(pian)(pian)上復合型雙(shuang)折(zhe)射(she)電子光(guang)(guang)(guang)(guang)學賠償膜(mo)(mo)(mo)STN應用(yong)偏(pian)(pian)光(guang)(guang)(guang)(guang)膜(mo)(mo)(mo)；在散射(she)底片(pian)(pian)上復合光(guang)(guang)(guang)(guang)轉為膜(mo)(mo)(mo)，可做成寬角度偏(pian)(pian)光(guang)(guang)(guang)(guang)膜(mo)(mo)(mo)或窄角度偏(pian)(pian)光(guang)(guang)(guang)(guang)膜(mo)(mo)(mo)；應用(yong)聚氨(an)酯(zhi)樹(shu)(shu)(shu)脂(zhi).PVA膜(mo)(mo)(mo)或TAC膜(mo)(mo)(mo)上色，即五顏六色偏(pian)(pian)光(guang)(guang)(guang)(guang)膜(mo)(mo)(mo)。實際上，伴(ban)隨(sui)著新式(shi)液晶顯示屏新產品(pin)的(de)飛速發展，偏(pian)(pian)光(guang)(guang)(guang)(guang)膜(mo)(mo)(mo)的(de)種類也越來越多(duo)了。