Liquid crystal display apparatus

Details Liquid crystal display apparatus Liquid crystal display apparatus

1982-11-01

1985-12-03

Curtis, Marshall M.

Communications: electrical

Visual indication

Movable

340784, 340805, G09G 336

Patent

active

045568804

ABSTRACT:
The invention is concerned with a liquid crystal display apparatus which displays data by driving a liquid crystal panel in synchronism with horizontal synchronizing signals and vertical synchronizing signals. The driver for driving the liquid crystal panel is provided with timing signals maintaining a predetermined period, and with a voltage in synchronism therewith, irrespective of the horizontal and vertical synchronizing signals. Therefore, even when the horizontal and vertical synchronizing signals have not been applied, the liquid crystal panel is provided with an a-c voltage of which the polarity is alternatingly reversed by the timing signals. Therefore, electrolysis does not take place in the liquid crystal panel, and the quality of display is not degraded.

REFERENCES:
patent: 3653745 (1972-04-01), Mao
patent: 3868674 (1975-02-01), Lorteije et al.
patent: 3895372 (1975-07-01), Kaji et al.

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