Electro-Optical Properties of OCB Mode for Multi-Media Application

Changhun LEE  Haksun CHANG  Seonhong AHN  Kunjong LEE  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.11   pp.2249-2252
Publication Date: 2003/11/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electronic Displays)
Category: LCD Technology
Keyword: 
OCB mode,  viewing angle,  critical voltage,  

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Summary: 
We have obtained high performance and low voltage driving OCB panel by reducing the critical voltage and retardation matching between liquid crystal layer and compensation films. Flattening color filter layer and optimizing rubbing process have minimized the critical voltage in the panel. In addition, an appropriate retardation of the film and LC layer has scanned to achieve low driving voltage and high transmission. Especially, by adopting new driving scheme, we considerably reduced the initial bend transition time, which is known as one of drawbacks in OCB mode. As a result, we developed the proto-type 17" WXGA OCB panel with less than 5 V drive, over 90% of TN light efficiency and over 80 degree for all viewing direction except for rubbing direction including color shift as well as high-speed response time.