Antiferroelectric liquid crystal light modulation device
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United States of America Patent
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Dec 31, 1996
Grant Date -
N/A
app pub date -
May 3, 1994
filing date -
May 11, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The liquid crystal light modulation device of the present invention comprising a liquid crystal element consisting of one of plural liquid crystal cells and a voltage signal input means electrically connected with the liquid crystal element, wherein each liquid crystal cell contains a chiral smectic liquid crystal material layer and when a voltage signal is input to the liquid crystal element, the polarization direction of a light transmitted by the liquid crystal element is changed by approx. 90.degree. as compared with the state where the voltage signal is not input to the liquid crystal element enables a change of a light path and an open-close (on-off) operation of a light path at a high speed (optical switching time: not longer than 1 msec).
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