Study on the Characteristics of Homogeneously Aligned Nematic Liquid Crystal Cells

• Main Authors: Min-hua Hsu, 徐敏華
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/17173285851491402550

碩士 === 國立聯合大學 === 電機工程學系碩士班 === 94 === A simple and novel optical heterodyne interferometer based on phase measurement was developed to measure liquid crystal cell parameters. Based on the experimental data of the voltage-dependent phase change, the maximum phase retardation and cell gap of the homogeneously aligned nematic liquid crystal (NLC) layer was achieved experimentally. Based on the phase measurement of the liquid crystal cells, we also determined the pretilt angle and response time. Furthermore, the polar anchoring energy coefficient of the modified Rapini-Papoular formula can be determined by comparing the measured phase retardation versus voltage curve to that simulated from the commercial simulator.