Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1993-12-02
1996-07-09
Kuntz, Curtis
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 98, 345 89, G09G 336
Patent
active
055348858
ABSTRACT:
A liquid crystal display driving circuit comprises a plurality of transfer gates having their one end connected in common to a source line of a liquid crystal display panel and their other end connected to a plurality of driving voltages, respectively, for supplying a different voltage to the source line. A control circuit receives an image input data for selectively turning on the transfer gates, for the purpose of realizing a multiple gray scale display. The control circuit is configured to turn on one transfer gate selected from the plurality of transfer gates during a first period of one display period, and then, to maintain the turned-on condition of the selected transfer gate during the remaining period of one display period, or to simultaneously turn on two transfer gates which are selected from the plurality of transfer gates and which include the selected transfer gate during the remaining period of one display period.
REFERENCES:
patent: 5075683 (1991-12-01), Ghis
K. Takahara et al.; "16-Level Gray-Scale Driver Architecture and Full-Color Driving for TFT-LCD"; IEEE, IDRC 1991, pp. 115-118.
Eurpoean Search Report.
IBM Technical Disclosure Statement, vol. 33, No. 6B, Nov. 1990, New York U.S., pp. 384-385, "Driving Method for TFT/LCD Grayscale".
Chang Vivian W.
Kuntz Curtis
NEC Corporation
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