Circuit for driving a liquid crystal display device

Details Circuit for driving a liquid crystal display device Circuit for driving a liquid crystal display device

1990-04-20

1992-10-27

Brier, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

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

359 85, 359 86, G09G 336

Patent

active

051593262

ABSTRACT:
A mechanism for driving a matrix liquid crystal display which compensates for cross talk due to changes in temperature is provided. A matrix liquid crystal display has two substrates and a liquid crystal layer sandwiched between the two substrates. A group of common electrodes is formed on one substrate. A group of segment electrodes is formed on the other substrate. The common electrodes intersect with the segment electrode. A voltage is provided at the common electrodes and segment electrodes to produce a voltage waveform for driving the liquid crystal. A voltage waveform compensation circuit changes the voltages waveform in accordance with the pattern of drawings or characters to be displayed in the liquid crystal display device to produce the desired display and in accordance with at least one of an ambient temperature and a temperature of the liquid crystal display.

REFERENCES:
patent: 4045791 (1977-08-01), Fukai et al.
patent: 4485380 (1984-11-01), Soneda et al.
patent: 4845482 (1989-07-01), Howard et al.
patent: 4864290 (1989-09-01), Waters
patent: 5010326 (1991-04-01), Yamazaki et al.
patent: 5012274 (1991-04-01), Dolgoff

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