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.

To overcome the problem of narrow viewing angle in active matrix liquid crystal displasy(LCDs) in the twisted nematic mode(TN mode), we have proposed a new LCD mode using a bend-alignment cell with an optical compensator. In this new mode, we have successfully obtained a black state with almost no leakage over a wide viewing angle range with very fast response. We describe the fundamental principle and design rule of the optical compensator and discuss the properties obtained in theoretical and experimental term.