Methods of compensating liquid crystal displays using DC balancing
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United States of America Patent
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Aug 3, 2004
Grant Date -
Apr 4, 2002
app pub date -
Oct 19, 2001
filing date -
Dec 27, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a reflective mode FLC application, a 1/4-wave plate compensating FLC is used in series with a 1/4-wave imaging FLC to compensate for the effects of DC balancing. Alternatively, the compensating wave plate could be any odd 1/4-wave multiple, such as 3.lambda./4, 5.lambda./4, etc. The FLCs are driven in synchronization between on and off states with the total effective retardation for each FLC being either none or one-half wavelength in a double pass.
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