單、雙向延伸高分子分散液晶薄膜之研究

Abstract

近10年來，平面顯示器蓬勃發展帶動了顯示器的革命，成功取代傳統CRT 。在平面顯示器的熱潮中，由於液晶顯示器具有輕、薄的特性，並且各尺寸都有其應用產品，因此成為眾多平面顯示器中最重要的技術。能量的消耗對易於攜帶的液晶顯示器是很重要的考量因素，然而現階段應用於筆記型電腦的液晶平面顯示器其效能大約只有百分之六，最主要的能量損耗在於吸收式的偏極片。 研究顯示：拉伸過後的高分子分散液晶薄膜對光具有選擇性，藉由使用高分子分散液晶薄膜便可使散射的光在背光系統中回收再利用，使效能提升。本篇論文主要探討高分子分散液晶薄膜於拉伸過後的特性，並進一步將單向拉伸延伸至雙向拉伸，使其具有正方位極化的特性。

In the last one decade, flat panel displays have develop vigorously, promote the display revolution, and replace CRT successfully. In this current of flat panel displays, LCDs have the properties of light, thin, and have products of each size, so LCDs become the most important technology of numerous flat panel displays. For portable applications power consumption of a LCD is of the utmost importance. However, in typical high resolution LCDs utilized in laptop computer applications, the optical efficiency is approximately 6%. One of the primary reasons is the absorbing polarizers.

It has been reported that a stretched PDLC film has polarization selectivity. By utilizing these films for LCD applications, scattered light can be recycled in a backlight system to improve the optical efficiency. This thesis uses the PDLC material to fabricate stretched PDLC films and research the optical characteristics. Moreover, uniaxial extension is extended to biaxial extension to fabricate an azimuthal polarization converter.