Liquid crystal cells – elements and systems – Liquid crystal system – Liquid crystal eyewear
Patent
1997-03-25
1999-08-24
Sikes, William L.
Liquid crystal cells, elements and systems
Liquid crystal system
Liquid crystal eyewear
349 74, 349120, 349130, 349165, G02F 11347, G02F 11335, G02F 11337, C09K 1960
Patent
active
059431040
ABSTRACT:
Light responsive, transmissivity variable eyewear utilizing two specifically configured liquid crystal cells and a method of making the cells is disclosed. The cell itself includes a pair of spaced apart transparent substrates in confronting parallel relationship to one another, transparent electrodes exposed over the outer surfaces of the substrates and connectable to a voltage control arrangement, a liquid crystal mixture contained between the substrates and tilted homeotropic alignment layers formed on the inner confronting surfaces of the substrates. The liquid crystal mixture contains a liquid crystal material with a negative dielectric anisotropy and dichroic dye molecules. All of which cooperate with one another such that the cell is highly transparent indoors, that is, out of the sunlight and is much less transparent, that is dark, in the sunlight.
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Doroski David
Moddel Garret R.
Horney Kari M.
Shear Stephen C.
Sikes William L.
University Technology Corporation
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