Optical modulation device with liquid crystal voids formed by the spacer arrangements
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United States of America Patent
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Oct 17, 1995
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N/A
app pub date -
Jul 13, 1994
filing date -
Jan 15, 1992
priority date (Note) -
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Abstract
An optical modulation device includes first (1,4,6) and second (2,5,7) optically transmissive parallel plates having a ferroelectric liquid crystal material sandwiched between them. A plurality of spacer members (10), each secured to one of the plates, are located between the plates to maintain the plate spacing. The spacer members form walls defining parallel liquid crystal material-containing channels (11) which extend parallel to the plates. These channels communicate along their lengths with cavities (12) at least partly defined by the spacer members (10). These cavities may be created by segmenting each wall, the separations between the successive segments constituting the respective cavities. Alternatively, each wall may be provided with a parallel auxiliary wall of lesser height close to it but spaced from it, the space between the two walls forming a cavity.
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