Eun-Guk Lee

P-92: High-Speed-Addressing Method of a Bistable Twisted-Nematic LCD

In this paper we propose a high-speed matrix-addressing method to reduce the addressing time in a bistable TN LCD. By investigating the pulse width and the minimum voltage of the selection pulse as we vary the position of the selection pulse, we found that the addressing time can be reduced below 0.5 μs by moving the position of the selection pulse.

69.4: Amorphous Silicon Based 40″ LCD TV Using Ultra Fast OCB Mode

The worlds largest (40 inch) size a-Si TFT-LCD HDTV (1366 × 768) panels based on OCB (optically compensated bend) mode has been successfully developed using newly developed impulsive driving method, which shows the contrast ratio over 500, viewing angle over 160 degree for all direction, brightness over 600 cd/m2 and MPRT in the range of 7 ∼ 10ms. Especially, transmittance and viewing quality of the motion picture have been remarkably enhanced by gray impulsive driving (GID) method. We are now continuing further research in order to improve the contrast ratio and reliability for commercialization.