Liquid crystal composition and liquid crystal display device
AssigneesJnc Corporation, Jnc Petrochemical Corporation
InventorsNorikatsu Hattori, Kazuhiko Saigusa
Life of this patent
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Abstract
The liquid crystal composition having a negative dielectric anisotropy contains two ring compound having a large optical anisotropy and a negatively large dielectric anisotropy as the first component, three ring compound having a large maximum temperature and a large dielectric anisotropy as the second component, three ring compound having a large optical anisotropy and a large dielectric anisotropy as the third component, and two ring compound having a small viscosity as the fourth component. The liquid crystal display device contains the compositions.
Claims17
A liquid crystal composition that has a negative dielectric anisotropy and contains at least one compound selected from the group of compounds represented by formula (1) as a first component, at least one compound selected from the group of compounds represented by formula (2) as a second component, at least one compound selected from the group of compounds represented by formula (3) as a third component and at least one compound selected from the group of compounds represented by formula (4-2) as a fourth component:
- wherein R1, R3 and R5 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkenyl containing only one double bond and having 2 to 12 carbons;
- R2, R4, and R6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkenyl having 2 to 12 carbons;
- R7 is independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons;
- ring A is 1,4-cycrohexylene, or 1,4-pnenylene;
- X1, X2, X3 and X4 are independently fluorine or chlorine;
- Y1 is independently hydrogen or methyl;
- Z1 is independently a single bond or ethylene.
Dependencies are inferred from the claim text.