Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-08-19
1999-02-02
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349 86, G02F 11333
Patent
active
058672389
ABSTRACT:
A polymer-dispersed liquid crystal device comprises a multiplicity of droplets of a birefringent, functionally nematic liquid crystal material dispersed in a matrix comprising the reaction product of ultraviolet radiation polymerizable materials. The device specularly transmits incident light as a function of the magnitude of an electric field applied across the device. The difference between a first applied voltage corresponding to a first percentage of the total incident light transmitted by the device as specular light and a second applied voltage corresponding to a second percentage of the total incident light transmitted by the device as specular light is greater than or equal to 15 volts. As a result, a polymer-dispersed liquid crystal device according to the invention displays a variable grey scale which has a uniform optical transmission. A method for preparing a PDLC device in general is also disclosed.
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Gilbert Laurence R.
Huffman William A.
Miller Stephen A.
Vesley George F.
Minnesota Mining and Manufacturing Company
Parker Kenneth
Schultz Leland D.
Sikes William L.
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