Patent
1986-03-18
1989-03-28
Heyman, John S.
350334, 350350F, G02F 113
Patent
active
048158267
ABSTRACT:
A liquid crystal material contained in plural volumes in a containment medium and operative selectively to transmit light in the presence of a prescribed input or to scatter light, and non-pleochroic dye in at least one of the liquid crystal material and the containment medium. In one embodiment generally isotropic scattering of light by the liquid crystal together with enhanced scattering features which increase the path length of the light through dye results in increased coloration with minimum dye. The enchanced scattering features may be achieved using total internal reflection and/or optical interference principles. In an embodiment the dye is a fluorescent dye.
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Gallivan Richard
Heyman John S.
Manchester R & D Partnership
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