The Investigation of Defect Improving For Optically Compensated Bend Liquid Crystal Display

• Main Authors: Chien How Wen, 簡浩文
• Other Authors: G. M. Wu
• Format: Others
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/16262335039462422597

博士 === 長庚大學 === 電子工程學系 === 99 === Abstract OCB (Optically Compensated Bend) mode LCD has advantages in wide viewing angle and fast response time, and therefore can meet all LCDs' demands as the next generation display with perfect and high quality frame. However, in the OCB mode operating process, there are still essential problems to be overcome. The arrangement of liquid crystal molecules in cells are splayed in beginning, but it is operated in bend arrangement with fast responding. In topology, the turning phenomena of arrangements in splay and bend are not continuous. Therefore, there is a threshold voltage (VC) between these two states. This process needs some time to stabilize, and is called warm-up time. In this investigation, we used many newly invented processes, such as eximer laser, plasma, ion beam, double-structure, and high pretilt angle solve the warm-up time problem to OCB. The OCB advantages in fast response time have been preserved. We also compared with different new processes to reveal the best parameters ( Eximer laser 250±50mJ/cm2, Plasma 600mm/s, Ion beam 165ev, Double-structure and high pretilt angle 45。〜61。) for OCB research.