Nematic liquid crystal mixtures and a matrix liquid crystal display
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United States of America Patent
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Jan 30, 2001
Issued Date -
N/A
app pub date -
May 26, 1993
filing date -
Apr 2, 1990
priority date (Note) -
Expired
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Abstract
The invention relates to a nematic liquid crystal mixture having a positive dielectric anisotropy .DELTA..epsilon. of at least +4 and a birefringence .DELTA.n of at least 0.12, characterized in that the mixtures comprises one or more components having the core structure ##STR1## wherein L.sup.1, L.sup.2, Y and Z are each independently of one another H or F, one of Q.sup.1 and Q.sup.2 is 1,4-phenylene, 3-fluoro-1,4-phenylene or 3,5-difluoro-1,4-phenylene and the other residue Q.sup.1 or Q.sup.2 is --CH.sub.2 CH.sub.2 --, --CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 -- or --if at least one of L.sup.1, L.sup.2, Y and Z denotes F--also a single bond, whereby this core structure can be optionally further fluorinated in the benzene rings.
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