Liquid crystal cells – elements and systems – Particular excitation of liquid crystal – Electrical excitation of liquid crystal
Patent
1997-01-08
1999-08-03
Sikes, William L.
Liquid crystal cells, elements and systems
Particular excitation of liquid crystal
Electrical excitation of liquid crystal
349 33, 349 34, 349 85, 349168, 349165, 349176, 349177, 349186, 345 94, 345 95, 345 96, 345 97, 345209, 345210, G02F 1137
Patent
active
059332034
ABSTRACT:
Driver apparatus and methods of driving at least a portion of a cholesteric liquid crystal ("CLC") panel to a state having a given reflectivity. One of the methods includes the steps of: (1) initially driving the portion to a nematic phase, (2) subsequently driving the portion to a cholesteric phase focal-conic state, the cholesteric phase focal-conic state providing a known reference state for subsequent driving of the portion and (3) thereafter driving the portion to the state having the given reflectivity.
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Gao Jianmi
Wu Bao-Gang
Zhao Meng
Advanced Display Systems, Inc.
Ngo Julie
Sikes William L.
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