Method for the control of an electro-optical matrix screen and control circuit
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United States of America Patent
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-
Oct 8, 1991
Grant Date -
N/A
app pub date -
Aug 15, 1988
filing date -
Oct 17, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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