Drive system for liquid crystal display device

Details Drive system for liquid crystal display device Drive system for liquid crystal display device

1978-05-26

1980-10-07

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340713, 340805, G06F 344

Patent

active

042271924

ABSTRACT:
Drive signals are applied to the segment and digit electrodes of a liquid crystal display device in a time-multiplexed manner by means of a control circuit adapted to control first and second gates the output of one of which is selected as a segment signal by selection means, and further adapted to control a digit signal generating circuit for producing a digit signal that cooperates with the segment signal to drive the display. The effective application of drive signals allows a reduction in the number of segment electrodes and in the quantity of associated wiring so that the degree of integration on an IC chip can be increased.

REFERENCES:
patent: 3911426 (1975-10-01), Mouton et al.
patent: 4060802 (1977-11-01), Matsuki
patent: 4065764 (1977-12-01), Houryu
patent: 4076385 (1978-02-01), Kondo
patent: 4142182 (1979-02-01), Kmetz

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