Response Time Improvement of OCB Mode TFT-LCDs by Using Capacitively Coupled Driving Method

Kenji NAKAO  Shoichi ISHIHARA  Yoshinori TANAKA  Daiichi SUZUKI  Ichirou SATOU  Tsuyoshi UEMURA  Keisuke TSUDA  Noriyuki KIZU  Junichi KOBAYASHI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E84-C   No.11   pp.1624-1629
Publication Date: 2001/11/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electronic Displays)
Category: Active Matrix Displays
Keyword: 
liquid crystal,  OCB,  CC driving method,  response time,  

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Summary: 
We have developed a super-fast response OCB (Optically self-Compensated Birefringence) mode TFT-LCD by using capacitively coupled driving method (CC driving method). Response time with this driving method has been improved by the twice or more compared with that of a conventionally driven TFT-LCD. Even at a low temperature, 0 degree, this panel can response within one field time, 16.7 ms, between every gray scale levels. We developed a prototype OCB mode LCD with newly designed compensation films, that achieved a wide viewing angle characteristic of 160 degrees horizontally and 140 degrees vertically under the condition of that the contrast ratio exceeds 10:1.