Liquid crystal display systems
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United States of America Patent
Stats
-
Jul 12, 1983
Grant Date -
N/A
app pub date -
May 28, 1980
filing date -
May 28, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A matrix liquid crystal display circuit operates on a level of AC voltage equal to the voltage required for DC drive. The circuit includes a selecting transistor connected to the picture element and a capacitor for each picture element of the matrix. The capacitor in each row connects to a common electrode and the transistor gates in each row connect to a common electrode. The voltage level of the common capacitor electrode is shifted periodically relative to a reference voltage in order to invert the image signal polarity across the picture element and produce an AC drive. Inverted image signals of similar voltage level are alternately sampled.
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Cited Art Landscape
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