Computer graphics processing and selective visual display system – Display driving control circuitry
Patent
1997-03-05
1998-12-15
Brier, Jeffery
Computer graphics processing and selective visual display system
Display driving control circuitry
345 98, G09G 336
Patent
active
058502165
ABSTRACT:
A TFT-LCD driver circuit for sequential and double scanning, includes a scanning pattern generator to generate, in accordance with the scanning direction, category of image to be displayed and a first clock signals, second clock signals and plural scanning pattern signals; a ripple counter to count the second clock signals; a multiplexer to select count signals corresponding to the scanning direction from among those outputted from the ripple counter; a decoder to decode the signals outputted from the multiplexer and to output decoding signals in accordance with the scanning direction; a masking logic to output a masking pulse signal in accordance with the image category under the control of the scanning pattern generator; a NOR gate array NORing the masking pulse signal and the decoding signals outputted from the decoder, and outputting enable signals; and an output cell array including plural output cells logically operating the enable signals the scanning pattern signals and applying them as scanning signals to respective gate lines of the TFT-LCD.
REFERENCES:
patent: 4807974 (1989-02-01), Hirai
patent: 5063378 (1991-11-01), Roach
Brier Jeffery
Kovalick Vincent E.
LG Semicon Co. Ltd.
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