Lee Gak Seok, Lee Jeong Hyun, Kim Jae Chang, Yoon Tae-Hoon, Kim Jin-Hwan, Yu Jae-Ho, Choi Hwan-Young
School of Electrical Engineering, Pusan National University, Busan 609-735, Korea.
Opt Express. 2009 Feb 2;17(3):1361-71. doi: 10.1364/oe.17.001361.
In this paper an optical configuration of a transflective liquid crystal (LC) cell driven by a horizontal electric field is proposed, which shows high contrast, high cellgap tolerance, and single gamma, simultaneously. The dark state of the reflective part is realized by a polarizer (0 degrees), a half-wave plate (15 degrees), LC layer (120 degrees), and a quarter-wave layer (-15 degrees), while a wide-band quarter-wave plate (45 degrees) and a polarizer (90 degrees) are added for the dark state of the transmissive part. Since the optic axis of the homogeneously aligned LC layer is set to be parallel to the polarization direction of the light passed through the half-wave plate, the dark state is rarely affected by the cellgap of the LC layer. Due to the different directions of the electric fields, LCs are rotated to 97.5 degrees for the bright state of the reflective part, but to 75 degrees for that of the transmissive part. With the proposed configuration, a high contrast single-gamma transflective display with high cellgap tolerance can be realized in a single-cellgap structure.
本文提出了一种由水平电场驱动的透反式液晶（LC）盒的光学结构，该结构同时具有高对比度、高盒厚容忍度和单一伽马值。反射部分的暗态由一个偏振器（0度）、一个半波片（15度）、液晶层（120度）和一个四分之一波层（-15度）实现，而透射部分的暗态则添加了一个宽带四分之一波片（45度）和一个偏振器（90度）。由于均匀排列的液晶层的光轴设置为与穿过半波片的光的偏振方向平行，暗态很少受到液晶层盒厚的影响。由于电场方向不同，对于反射部分的亮态，液晶旋转到97.5度，而对于透射部分的亮态，液晶旋转到75度。采用所提出的结构，可以在单盒厚结构中实现具有高盒厚容忍度的高对比度单伽马透反式显示器。
