Investigation on the Properties of Phase-Change-Guest-Host Mode Liquid Crystal Display with a Rough Reflector

• Main Authors: Lee Tzu-Yang, 李紫陽
• Other Authors: Chen, Shu-Hsia
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/11339854114377868202

碩士 === 國立交通大學 === 光電工程研究所 === 85 === Two important properties of "Reflective Phase-Change-Guest-Host (PCGH) Mode Liquid Crystal Display (LCD)" are studied, one is liquid crystal and the other one is its reflector. First, the threshold electric fields and response time of the liquid crystal for PCGH mode with different ratio of cell gap and pitch (d/p0) by using the same cell gap but changing the concentration of chiral dopant is studied. In experiment, the samples with rubbing homotropic aligned PI by different method can reduced the response time of traditional PCGH mode LCD. Second, the method of optimum design the rough reflector with bumps is investigated. The randomness (R) of the bumps' positions on reflector is designed between 0.4 to 0.6 to reduced the interference, and roughness factor (K) of bumps' shape is designed between 6 to 10 to get brighter and wider viewing angle by simulation and experiments.