Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1993-10-07
2000-11-21
Nguyen, Chanh
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 95, G09G 336
Patent
active
06151005&
ABSTRACT:
A liquid-crystal display system comprising a voltage divider circuit, and a gate circuit. The voltage divider circuit divides n voltages of n different voltage levels supplied from a power source for liquid-crystal displays, into m voltages of m different voltage levels (n<m), n and m are integers large than 1 corresponding to display data. A control signal commands the gate circuit to deliver a first voltage during the first period of one horizontal scanning cycle, and to deliver a second voltage during the second period thereof subsequent to the first period. In response to the control signal, the gate circuit corrects a signal corresponding to the display data and delivers the corrected signal during the first period so as to select a circuit which has a time constant not exceeding that of a circuit for delivering a voltage corresponding to the display data, from among circuits for supplying the m divisional voltages, and it delivers the signal left intact, during the second period. The voltage divider circuit is supplied with the output signal of the gate circuit, and it selects and delivers the voltage. Thus, the selected voltage is delivered directly without a buffer, and the liquid-crystal panel of the display system can be quickly driven.
REFERENCES:
patent: 5066945 (1991-11-01), Kanno et al.
patent: 5214417 (1993-05-01), Yamazaki
patent: 5309151 (1994-05-01), Aoki
Furuhashi Tsutomu
Futami Toshio
Nitta Hiroyuki
Takita Isao
Tsunekawa Satoru
Hitachi , Ltd.
Nguyen Chanh
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