The study on improving the electro-optical property in a vertical aligned liquid crystal cell with polymers using in-plane switching

• Main Authors: Bo-Yu Chen, 陳柏宇
• Other Authors: 吳俊傑
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/eb22jp

碩士 === 國立臺北科技大學 === 光電工程系研究所 === 100 === In this thesis, the vertical aligned liquid crystal displays with in-plane switching (VA-IPS) are studied. By integrating the polymer networks and interdigital electrodes driving for liquid crystal (LC), we can improve the electro-optical characteristics of the conventional vertical aligned LC displays. As compared with the pure LC cell (E7), the LC cell with the TA-9164 polymer networks presents the faster switching behaviors and comparable optical transmittance, attributed to the surface anchoring energy. The major advantage in the optical performance of such a LC cell is that the optical bouncing, caused by the backflow effect on the molecular orientation during the turn-on process, will be reduced significantly, and the LC molecules will return to the original alignment faster during turn off. In addition, high concentration doping can effectively improve the switching behaviors of LC cells, but it also sacrifices the transmittance due to the light scattering, and increases the threshold voltage. Therefore, it requires trade-offs between the monomer concentration and the electro-optical performance.