Color variance polymer matrix display having two scattering states or N.sub. both N.sub.E and N.sub.O
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United States of America Patent
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Mar 12, 1996
Grant Date -
N/A
app pub date -
Mar 18, 1993
filing date -
Mar 18, 1993
priority date (Note) -
Expired
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Abstract
Liquid crystal polymer matrix displays are disclosed, one of which is capable of changing from a first color to a second color and shades of color therebetween, and the other of which is capable of changing from a first color to a true colorless state and to lower intensities of said first color. Droplets of liquid crystal material containing a dye mixture comprising a positive order parameter dye and a negative order parameter dye, or a positive order parameter dye and a zero order parameter dye, or a negative order parameter dye and a zero order parameter dye, are dispersed in the polymer matrix. The color changes are attained by varying the magnitude of an electric field across the polymer matrix. The optic axes of the liquid crystal material can be partially of fully aligned in one direction during the curing of the polymer matrix thereby enhancing possible color changes.
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