Compound having hydrocoumarin skeleton, liquid crystal compostition, and liquid crystal display device
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United States of America Patent
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Feb 5, 2013
Grant Date -
Aug 11, 2011
app pub date -
Apr 11, 2011
filing date -
Dec 8, 2005
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Abstract
A liquid crystal compound is to be obtained that has stability to heat, light and so forth, a high clearing point, a suitable optical anisotropy, a large negative dielectric anisotropy, and excellent compatibility with other liquid crystal compounds. A liquid crystal composition containing the compound is also to be obtained that has a low viscosity, a suitable optical anisotropy, a suitable negative dielectric anisotropy, a low threshold voltage, a high maximum temperature of a nematic phase (phase transition temperature from a nematic phase to an isotropic phase), and a low minimum temperature of a nematic phase. A compound having a hydrocoumarin skeleton is synthesized, and a liquid crystal composition containing the compound is produced.
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