Twisted liquid crystal surface mode device

Details Twisted liquid crystal surface mode device Twisted liquid crystal surface mode device

1997-06-24

1999-11-23

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Interconnection of plural cells in series

349136, 349 99, 349 33, G02F 11347, G02F 1141, G02F 11335, G02F 1133

Patent

active

059909919

ABSTRACT:
A twisted liquid crystal device includes a liquid crystal layer and first and second alignment layers disposed in opposite sides of the liquid crystal layer. The first and second alignment layers have respective alignment directions which are mutually inclined. A first linear polarizer is disposed on the opposite side of the first alignment layer to the liquid crystal layer. Electrodes apply a variable voltage across the liquid crystal layer which has a twisted liquid crystal structure and is arranged for operation in a surface switching mode with first and second regions of the liquid crystal layer adjacent the alignment layers being mutually optically de-coupled so as to act, within the liquid crystal layer, when in use, like a pair of separate, active optical retarders having mutually inclined optic axes and optical retardations which can be varied within a range to cause color.

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