Analysis of optical properties and design parameters of wide viewing angle compensation films for TN mode LCD

• Main Authors: Hsu-Ping Chiu, 邱旭平
• Other Authors: Jenn-Chiu Hwang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/72891527040857901943

碩士 === 元智大學 === 化學工程與材料科學學系 === 94 === In this study, the optical properties of the normally white TN mode liquid crystal display were analyzed by using LCD Master software from Shintech,Inc in Japanese. The principal parameters, including materials of liquid crystal, the thickness of cell gap, pretilt angle and rubbing angle were used to simulate with optical analyzer. The results of director alignment distribution and equal potential distribution were discussed in the liquid crystal cell. We also tried to find the best parameters. According to these results, we can improve the color shift for LCD between 380nm and 420nm of phase retardation, 4°and 6 of pretilt angle. Then, we reduced light leak of liquid crystal layer in inclined direction by using four different biaxial retardation films. The contrast ratio was above 20：1 in horizontal and vertical viewing angle ±70°,and improved the viewing angle range over 160˚for. We expect to obtain a TN mode liquid crystal display with high quality and wide viewing angle characteristics by using the simulated result.