Liquid crystal cells – elements and systems – Particular structure – Interconnection of plural cells in series
Patent
1997-03-22
2000-03-07
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Interconnection of plural cells in series
349 91, 349115, 349169, 349176, G02F 11347, G02F 11335, G02F 113
Patent
active
06034752&
ABSTRACT:
A liquid crystal display device includes cell wall structure and a chiral nematic liquid crystal material. The cell wall structure and the liquid crystal cooperate to form focal conic and twisted planar textures that are stable in the absence of a field. A device applies an electric field to the liquid crystal for transforming at least a portion of the material to at least one of the focal conic and twisted planar textures. The liquid crystal material has a pitch length effective to reflect radiation having a wavelength in both the visible and the infrared ranges of the electromagnetic spectrum at intensity that is sufficient for viewing by an observer. One liquid crystal material may be disposed in a single region or two liquid crystal materials may be used, each in separate regions. One aspect of the invention is directed to a photolithography method for patterning a substrate of the display. The display may also have multicolor capabilities by including at least two materials that reflect visible light.
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Davis Donald J.
Hoke Kellie D.
Huang Xiao-Yang
Khan Asad A.
Urban, II Ellison C.
Kent Displays Incorporated
Sikes William L.
Ton Toan
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