Azine liquid crystal compounds for use in light-control devices
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United States of America Patent
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May 5, 1981
Issued Date -
N/A
app pub date -
Jul 27, 1979
filing date -
Apr 3, 1979
priority date (Note) -
Expired
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Abstract
A light-control device includes a liquid crystal material sandwiched between a pair of planar, light-transmitting members. The liquid crystal material particularly includes an asymmetrical azine compound having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are different para-substituents selected from the group comprising cyano, halogen, alkyl, and substituted alkyl radicals in which the alkyl radical has from one to nine carbon atoms, and wherein X and Y are selected from the group comprising hydrogen and methyl radicals.
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