Method for the control of an electro-optical matrix screen and c

Details Method for the control of an electro-optical matrix screen and c Method for the control of an electro-optical matrix screen and c

1988-08-15

1991-10-08

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

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

340805, 340811, G09G 300, G09G 336

Patent

active

050558331

ABSTRACT:
A control method and control circuit for an electro-optic matrix screen wherein: a) during a frame time period, and during the control of certain lines, the screen is controlled by voltages of a determined polarity; b) during the same frame time period, and during the control of the other lines, the screen is controlled by voltages of reverse polarity; and c) during the following frame time period, the control voltages is reversed. An inverter control circuit C.INV enables the inversion of the voltages given by input circuits INV, IN, ADD.C to the column electrodes, and by an addressing circuit ADD.C to the line electrodes. The invention can be applied to the control of liquid crystal display panels to eliminate display faults.

REFERENCES:
patent: 3976362 (1976-08-01), Kawakami
patent: 4191955 (1980-03-01), Robert
patent: 4427979 (1984-01-01), Clerc et al.
patent: 4645303 (1987-02-01), Sekiya et al.
patent: 4715688 (1987-12-01), Harada et al.
patent: 4779085 (1988-10-01), Mizutome et al.

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