Apparatus and method for driving signal electrodes for liquid cr

Details Apparatus and method for driving signal electrodes for liquid cr Apparatus and method for driving signal electrodes for liquid cr

1988-06-14

1989-08-22

Moore, David K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340793, G09G 336

Patent

active

048599980

ABSTRACT:
A signal electrode drive circuit for driving a liquid crystal display panel includes a latch circuit for latching a digitized video signal, a buffer, a graduation signal-forming circuit, an intensity modulation pulse-generating circuit, and an analog multiplexer. The latch circuit holds the video data only once during one horizontal scanning period until a next latch pulse M is generated, thus considerably reducing current dissipation.

REFERENCES:
patent: 4021607 (1977-05-01), Amano
patent: 4031541 (1977-06-01), Arisawa et al.
patent: 4447812 (1984-05-01), Soneda et al.
patent: 4581654 (1986-04-01), Kobayashi et al.
patent: 4591902 (1986-05-01), Masubuchi
patent: 4600274 (1986-07-01), Morozumi
Hitachi Seisakusho K.K.-Patents Abstracts of Japan, vol. 3, No. 117, Sep. 29, 1989, p. 92 E 141; & JP-a-54 94835 7/26/79.

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