Weak boundary storage liquid crystal display devices with bias voltage
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United States of America Patent
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Mar 25, 1986
Grant Date -
N/A
app pub date -
May 24, 1982
filing date -
May 24, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A two-electrode nematic liquid crystal display (LCD) device with inherent storage effect is described. The described storage effect LCD device, which can properly operate without refresh circuitry, can be of either the homogeneous or twisted nematic type. In accordance with the invention, the liquid crystal material-to-substrate anisotropic surface anchoring force is set sufficiently weak by surface treatment techniques, to prevent the restoration of the device to its quiescent state once the device has been driven temporarily to its active state by a temporary increase in an applied electric field.
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