Kiyoshige Kinugawa

Wide‐viewing‐angle 13.3‐in. XGA displays with in‐plane switching mode of nematic LCs addressed by TFTs

— We have developed a 13.3-in. TFT-LCD employing a new, wide-viewing-angle “super” TFT technology utilizing the in-plane switching mode of nematic liquid crystals. The new TFT-LCD has XGA resolution (1024 × RGB × 768 pixels), displaying 262,144 colors, providing vertical and horizontal viewing angles of 140°. This is far wider than that of a conventional TFT display, which is restricted to about 40° vertically and 90° horizontally.

A Monochromatic Black and White Supertwisted Nematic Liquid Crystal Display with a Single Cell and a Birefringent Film

To achieve a monochromatic black-and-white (B/W) STN-LCD with a single cell and a birefringent plastic film, the optimum conditions of optical properties in the birefringent film are analyzed theoretically and experimentally. By optimizing the film retardation to minimize the transmission of a STN-LCD at 550 nm, optical retardation in a STN cell is canceled and a B/W STN-LCD is obtained. By selecting the suitable conditions for compensating retardation of the STN cell, a B/W STN-LCD is achieved with the contrast ratio of 10:1.