Woon-Yong Park

48.2: Panel Design & Simulation of 40‐in. TFT‐LCD

A 40-inch wide screen format TFT-LCD with a resolution of 1280×768 has been developed for HDTV application. We have overcome the size limitation of 40-inch panel with optimum panel design and succeeded with current fabricating process. In this paper, we present the panel design and parameter simulation result of 40-inch TFT-LCD to obtain uniform picture quality.

P‐3: Panel Transmittance Analysis of PVA Mode and a Noble Pixel Design

Vertical Alignment mode TFT-LCD is divided into MVA mode through formation of protrusion, PVA mode that uses color filter ITO patterning and etc. Among these, R&D of PVA (Plus Viewing Angle) mode accomplished the practical Wide Viewing Angle through the several technical phases. The multi-domain structure by the effect of fringe-field and the application of biaxial compensation film are the examples. PVA mode has a characteristic of high transmittance compared other Wide Viewing Angle mode. However the recent requirements of diversification of a use and the requirements of improvement of a screen quality make the transmittance diminished by modification the cell parameter and etc. In the experimentation hereunder the structure of Gradual Y-slit has accomplished over 10% of transmittance than the existing chevron pattern by applying this to T-pattern. And the produced 17″SXGA T-pattern panel shows the characteristics of 300 nits of brightness, 65% of color gamut, 600:1 contrast ratio and 25ms response time.

53.3: Multisync Poly‐Si AMLCD

We propose a new scan driver circuit to implement multi display mode(mutisync function), which uses an identical conventional scan driver circuit without an additional circuit. The new scheme is simple and takes a small area, compared with the prior schemes for multisync mode. We have fabricated 7-inch QVGA low-temperature Poly-Si TFT LCD employing our scan driver architecture and obtained good display images for normal mode and cinema mode.