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.
Claims30
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 front 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.
A liquid crystal composition that has a negative dielectric anisotropy and consists essentially of 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, at least one compound selected from the group of compounds represented by formula (4-2) as a fourth component, and at least one compound selected from the group of compounds represented by formula (5) as a fifth component, and optionally contains at least one compound selected from the group of compounds represented by formula (6-1) as a sixth component, and/or at least one compound selected from the group of compounds represented by formula (4-1) as a further fourth component, wherein the at least one compound as the fourth component includes compound 3-HH-V shown below, and wherein a ratio of the first component is in the range of 5% by weight to 50% by weight, a ratio of the fourth component is in the range of 20% by weight to 60% by weight and a ratio of the fifth component is in the range of 10% by weight to 35% by weight based on the total weight of the liquid crystal composition:
- 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 alkoxy having 1 to 12 carbons, R7, R9 and R10 are independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons;
- R11 and R12 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons or alkenyl having 2 to 12 carbons in which hydrogen is replaced with fluorine;
- R13 and R14 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 3 carbons or alkenyl having 2 to 12 carbons;
- ring A is 1,4-cyclohexylene or 1,4-phenylene;
- ring B, ring C or ring D are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluro-1,4 phenylene, or 3-fluro-1,4 phenylene;
- X1, X2, X3, X4, X5 and X6 are independently fluorine or chlorine;
- Y1 is independently hydrogen or methyl;
- Z1 is independently a single bond or ethylene;
- Z2 and Z3 are independently a single bond, ethylene, methyleneoxy or carbonyloxy;
- Z4 is independently a single bond, ethylene or methyleneoxy;
- m is 0, 1 or 2 and at least one of ring C and ring D is 1,4-phenylene when m is 0.
Dependencies are inferred from the claim text.