Liquid crystal display device with scanning electrode selection means
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United States of America Patent
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Dec 27, 1994
Grant Date -
N/A
app pub date -
May 17, 1991
filing date -
May 25, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
In a liquid crystal display device, to improve the contrast, the frame frequency is raised by scanning the scanning electrodes of the liquid crystal display panel a plurality of times during one field interval of the video signal. The scanning electrodes are divided into two groups, which are scanned alternately. An image memory is provided to store video signals. In scanning the liquid crystal display panel, the video signal from the video signal supplying source and the video signal read from the image memory are alternately supplied to the liquid crystal display panel. The image memory stores only part of the video signal such as the video signal for every other horizontal scanning period or the signal consisting of the most significant bit only, not the entire video signal.
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