Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1997-05-07
2000-05-09
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349 92, 349 93, 349156, 349 35, G02F 11333, G02F 11339, G02F 1137
Patent
active
060611073
ABSTRACT:
Polymer/cholesteric liquid crystal dispersions are provided in which the liquid crystal phase separated from the polymer matrix to form droplets. The cholesteric liquid crystals were positive dielectric anisotropic. At a zero field condition, the liquid crystal in the droplets was bistable, that is, the liquid crystal can be in either the reflecting planar state or the scattering focal conic state. When the liquid crystal 101 was in the planar texture, the helical axis of the liquid crystal was more or less perpendicular to the cell surface; colored light 105 was Bragg reflected. When the liquid crystal 101 was in the focal conic texture, the helical axis was more or less parallel to the cell surface, incident light was scattering 106 in the forward direction.
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Doane J. William
Lu Zhijian
Yang Deng-Ke
Chowdhury Tarifur R.
Kent State University
Sikes William L.
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