Liquid crystal writing slate with improved light-transmission retention
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United States of America Patent
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Aug 4, 1992
Grant Date -
N/A
app pub date -
Aug 9, 1990
filing date -
Aug 9, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A liquid crystal display device includes a base supporting a laminate which has an LC-layer (liquid crystal layer) formed of polymeric material holding micro-volumes of liquid crystal material, and a conductive layer on one surface of the LC-layer, the other surface of the LC-layer being substantially conductor-free, and apparatus for transitory application of potential through the LC-layer to the conductive layer to produce an image. The LC-layer has at least about 50% by weight of the polymeric material and less than 50% of the liquid crystal material by weight of the LC-layer, and the duration of image retention after transitory application of potential ceases is significantly extended.
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