Liquid crystal cells – elements and systems – Particular structure – Interconnection of plural cells in series
Patent
1993-10-05
1997-04-08
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Interconnection of plural cells in series
349 98, 349116, 349194, G02F 11335, G02F 11347, G02F 1141
Patent
active
056193556
ABSTRACT:
This invention provides a liquid crystal polarization handedness switch, and optical devices employing the handedness switch in conjunction with optical elements which are sensitive to the handedness of incident light. The handedness switch receives unpolarized light and converts it into circularly polarized light with switchable handedness. In combination with cholesteric circular polarizers, switchable color filters are provided. The color filters of this invention include the analogous x-y polarization switch combined with colored partial polarizers. The liquid crystals employed in the color filter of this invention can include SmC*, SmA*, antiferroelectric, DHF, achiral ferroelectric and twisted nematic liquid crystals.
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Johnson Kristina M.
Sharp Gary D.
Duong Tai V.
Sikes William L.
The Regents of the University of Colorado
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