Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-06-06
2000-12-26
Luu, Matthew
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345209, G09G 336, G09G 500
Patent
active
061667145
ABSTRACT:
A displaying device includes an array substrate on which a plurality of pixel electrodes are arrayed, a counter substrate having a common electrode arranged to oppose the pixel electrodes on the array substrate, a liquid crystal cell held between the array substrate and the counter substrate, and a display control circuit for controlling the potential difference between each pixel electrode and a common electrode to periodically invert the direction of an electric field in the liquid crystal cell. Particularly, the display control circuit includes an X-driver for level-inverting a pixel signal voltage (VSIG) of a first amplitude every predetermined period and supplying the pixel signal voltage to each pixel electrode to set a display gray scale level, and a common electrode driver for level-inverting a common voltage (VCOM) of a second amplitude in synchronism with level inversion of the pixel signal voltage (VSIG) and supplying the common voltage to the common electrode. The second amplitude is determined to be smaller than the first amplitude not exceeding the range from the minimum level to the maximum level of the pixel signal voltage (VSIG).
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patent: 5430460 (1995-07-01), Takabatake et al.
patent: 5640174 (1997-06-01), Kamei et al.
patent: 5774099 (1998-06-01), Iwasaki et al.
patent: 5801674 (1998-09-01), Shimuzu
Blackman Anthony J.
Kabushiki Kaisha Toshiba
Luu Matthew
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