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United States of America Patent
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Apr 25, 2000
Issued Date -
N/A
app pub date -
May 12, 1994
filing date -
Feb 20, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A ferroelectric liquid crystal apparatus comprising a liquid crystal cell having a ferroelectric liquid crystal carried between electrode substrates, means for producing a voltage signal for writing the information by applying an electric field via the electrode substrate and driving the ferroelectric liquid crystal, wherein voltage signal producing means determines the voltage signal value with reference to the drive status of a ferroelectric liquid crystal before writing, in writing the information.
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