Katsuhiko Kumagawa

48.4: Invited Paper: Fast Response OCB-LCD for TV Applications

OCB-LCD has fast response characteristics. In particular, the response time toward black state is less than 1 msec. It enables us to insert a black period between continuous two frames to make “pseudo-impulse” response on LCD. Subjective evaluation is carried out to clarify the effect of the black period. Viewing angle characteristics are also investigated.

30.5L: Late‐News Paper: An Advanced 23‐inch In‐Plane‐Switching Mode TFTLCD with H1920 × V1200 Pixels

A new 23-inch diagonal IPS (In-Plane-Switching) mode TFT-LCD with H1920 × V1200 pixels has been developed. This TFT-LCD has obtained good uniformity by using an advanced driving method which combines the Dual-line driving and the design of optimized storage-capacitance for each pixels. Furthermore, using a new pixel structure, which is a zigzag shaped pixel including zigzag shaped source lines, common electrodes, pixel electrodes and a color-filter, the aperture ratio becomes 25% larger than a conventional LCD.

A 23-in. UXGA-wide advanced IPS TFT-LCD with new driving method

Abstract A new 23-in. diagonal in-plane-switching (IPS) mode TFT-LCD with H1920×V1200 pixels has been developed. This TFT-LCD, which is a new structure with zigzag shaped pixels, has been adopted as an advanced IPS technology. Using this structure, the aperture ratio becomes 25% larger than that of conventional liquid crystal displays (LCDs). Furthermore, uniform image quality has been obtained by using the new dual-line driving method where the design has optimized storage-capacitance for each pixel.