膽石醇液晶/向列型液晶複合系於增亮膜研究

Fabrication of enhance light film in the cholesteric / nematic liquid crystals composite

黃國松(KUO-SUNG HUANG)

指導教授 ： 黃振球

元智大學/工程學院/化學工程與材料科學學系/碩士(2004年)

摘要

本實驗的目的是研究膽石醇液晶與向列型液晶混合，來探討選擇性光穿透與光反射效應。利用Cholesteric液晶與不同的Nematic液晶，包含可以UV光聚合和無法以UV光聚合的Nematic液晶混合成複合系液晶，研究其相行為及光電特性，藉著改變不同的外在環境條件，如溫度、電壓等和內部條件，如不同的混合比例和液晶濃度，再照射紫外光來使複合系液晶膜硬化，使得液晶高分子膜的選擇性反射光波段寬度改變，而使其呈現不同選擇性反射光波波段的變化，而能夠應用於光學增亮膜以提升顯示裝置的亮度。

關鍵字

膽固醇液晶 ； 增亮膜 ； 反射膜 ； 紫外光硬化液晶

並列摘要

The study is provide a process of broadening cholesteric reflection bands of photopolymerizable cholesteric liquid crystal and the nematic liquid crystal . we found that these two kinds of liquid crystals were miscible over entire weight tatio .The chital pitch of the binary composite changed along with temperature . The desired color can therefore be set by means of temperature of the binary composite and fixed by exposure UV light . Form the reflection measurement of Spectrophotometer , the reflective wavelength band shifted form red to blue as the percentage of nematic liquid crystal decreased. It was found that the broad cholesteric reflective band of ray radiation was achived by adjusting the tatio of cholesteric liquid crystal to nematic liquid crystal.The cholesteric / nematic liquid crystal film whose band width cover the entire visible spectral region of light can be used as a single film or a combination of a number of layers of cholesteric polymers with different pitch.The optical multiple layers apply to enhance light film color filter of liquid crystal display.

並列關鍵字

cholesteric liquid crystal ； brightness enhance film ； reflection film ； UV Curring liquid crystal ； pitch gradient

參考文獻

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