Liquid crystal display device, method of driving the same, and method of driving a portable information device having the liquid crystal display device
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United States of America Patent
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May 29, 2007
Grant Date -
Feb 21, 2002
app pub date -
Aug 8, 2001
filing date -
Aug 18, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A liquid crystal display device that displays an image by inputting n (n is a natural number) bit digital signals has n memory circuits in each pixel. The n memory circuits store n bit digital signals, which are converted into corresponding analog signals by a D/A converter provided in each pixel so that the analog signals are inputted to a liquid crystal element. Therefore, when a still image is to be displayed, the stored digital signals are repeatedly used once the digital signals are written in the memory circuits. During the still image is displayed, a source signal line driving circuit and other circuits can stop their driving. Power consumption of the liquid crystal display device thus can be reduced.
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