High dielectric anisotropy liquid crystal compound and composition containing the same
AssigneesIndustrial Technology Research Institute, Daily Polymer Co., Ltd.
InventorsKung-Lung Cheng, Shih-Hsien Liu, Ann-Cheng Chen, Peu-Jane Haung, Chih-Lung Chin
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Abstract
The invention relates to a high dielectric anisotropy liquid crystal compound which is a pyridyl derivative with substituents of electrons push-pull effect. Furthermore, the high dielectric anisotropy liquid crystal compounds are colorless and have high thermal and photo stability as well as high compatibility in a liquid crystal host. A liquid crystal composition containing the high dielectric anisotropy liquid crystal compound can reduce threshold voltage of cholesteric reflective displays, thus saving power and extending lifetime of driver ICs.
Claims23
A liquid crystal compound of formula (I):
- wherein each of Y1, Y2 and Y3, independently, is selected from the group consisting of halogen, cyano or thiocyano group;
- each of X1 and X2, independently, is selected from the group consisting of N or C;
- R is C1-12 alkyl or C1-12 alkoxyl;
- and
- Z is ester or single bond.
Dependencies are inferred from the claim text.