Column electrode drive circuit of liquid crystal display device

Details Column electrode drive circuit of liquid crystal display device Column electrode drive circuit of liquid crystal display device

1994-08-19

1996-12-10

Saras, Steven

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345104, 345182, G09G 336

Patent

active

055835350

ABSTRACT:
There is provided a column electrode drive circuit applicable to a display-integrated type tablet. A hold circuit has a plurality D-flip-flops. To clock terminals of the flip-flops is input an output signal of an AND circuit which receives inputs of a hold signal and a clock signal. To data terminals of the flip-flops are input sampled display signals. With the above-mentioned arrangement, when the hold signal is at "H" level, the sampled display signals are sequentially output as display signals without modification based on the clock signal. When the hold signal is a pulse signal, the sampled display signals are simultaneously output and held as the display signals. By thus making a simultaneous output function and a sequential output function compatible, the column electrode drive circuit can be utilized as a column electrode drive circuit for the display-integrated type tablet device.

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patent: 5440323 (1995-08-01), Okada

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