Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-08-08
2000-09-19
Mengistu, Amare
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
G09G 334
Patent
active
061219452
ABSTRACT:
A simple matrix drive type liquid crystal display device with enhanced display quality is provided. In line-at-a-time scanning, a scanning electrode group is supplied with two selecting voltages alternately; a signal electrode group is supplied with two voltages close to the intermediate value between the two selecting voltages. Which voltage is applied to the signal electrode is determined in accordance with the selecting voltage applied to the scanning electrode at that moment and a video signal in such a way that selected picture elements receive a large voltage and non-selected picture elements receive a small voltage. The output voltage of the power source circuit, which supplies power to the scanning circuit and the signal circuit that apply voltages to the scanning and signal electrode groups, is monitored so that, if the voltage is below a predetermined value, the liquid display device will not start display even when it receives a signal requesting starting of display from the outside.
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patent: 5323171 (1994-06-01), Yokouchi et al.
patent: 5404150 (1995-04-01), Murata
patent: 5619221 (1997-04-01), Hirai et al.
Williams, M., "Practical 5-Level LCD Multiplexing", 8080 Wescon Conference Record, vol. 24, pp. 1-8, Sep. 16-18, 1980.
Iwasaki Shoji
Kasami Makoto
Kobayashi Norimitsu
Maeta Kouji
Matsushita Akinori
Mengistu Amare
Sanyo Electric Co,. Ltd.
Tottori Sanyo Electric Co. Ltd.
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