Liquid crystal composition and liquid crystal display device
Provided are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light and high stability to heat, or the liquid crystal composition having a suitable balance regarding at least two of the characteristics; and an AM device having characteristics such as a short response time, a large voltage holding ratio, low threshold voltage, a large contrast ratio and a long service life. The liquid crystal composition has negative dielectric anisotropy and contains a specific compound having large negative dielectric anisotropy as a first component, a specific compound having low minimum temperature as a second component, and a specific compound having small viscosity as a third component, and the composition may contain a specific compound having high maximum temperature or small viscosity as a fourth component, a specific compound having negative dielectric anisotropy as a fifth component, or a specific compound having a polymerizable group as an additive component.
1. A liquid crystal composition that has 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 and a compound represented by formula (3) as a third component:
wherein, in formula (1) and formula (2), R 1 is alkenyl having 2 to 12 carbons, R 2 , R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring A and ring C are independently 1,4-cyclohexylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, or 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine; ring D and ring F are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, or 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, in which at least one of ring D and ring F is 1,4-cyclohexenylene; ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl; ring E is 2,3-difluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl; Z 1 , Z 2 , Z 3 and Z 4 are independently a single bond, ethylene, carbonyloxy or methyleneoxy; a is 1, 2 or 3; b is 0 or 1; a sum of a and b is 3 or less; c is 1, 2 or 3; d is 0 or 1; and a sum of c and d is 3 or less.
2. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (1-1) to formula (1-17) as the first component:
wherein, in formula (1-1) to formula (1-17), R′ is alkenyl having 2 to 12 carbons, R 2 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.
3. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (2-1) to formula (2-5) as the second component:
wherein, in formula (2-1) to formula (2-5), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.
4. The liquid crystal composition according to claim 1 , wherein a proportion of the first component is in the range of 5% by weight to 60% by weight, a proportion of the second component is in the range of 5% by weight to 50% by weight, and a proportion of the third component is in the range of 5% by weight to 35% by weight, based on the weight of the liquid crystal composition.
5. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (4) as a fourth component:
wherein, in formula (4), R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring G and ring I are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; Z 5 is a single bond, ethylene or carbonyloxy; e is 1, 2 or 3; and when e is 1, ring I is 1,4-phenylene.
6. The liquid crystal composition according to claim 5 , containing at least one compound selected from the group of compounds represented by formula (4-1) to formula (4-12) as the fourth component:
wherein, in formula (4-1) to formula (4-12), R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.
7. The liquid crystal composition according to claim 5 , wherein a proportion of the fourth component is in the range of 5% by weight to 40% by weight based on the weight of the liquid crystal composition.
8. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (5) as a fifth component:
wherein, in formula (5), R 7 and R 8 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring N and ring P are independently 1,4-cyclohexylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, or 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine; ring Q is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl; Z 6 and Z 7 are independently a single bond, ethylene, carbonyloxy or methyleneoxy; p is 1, 2 or 3; q is 0 or 1; and a sum of p and q is 3 or less.
9. The liquid crystal composition according to claim 8 , containing at least one compound selected from the group of compounds represented by formula (5-1) to formula (5-17) as the fifth component:
wherein, in formula (5-1) to formula (5-17), R 7 and R 8 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.
10. The liquid crystal composition according to claim 8 , wherein a proportion of the fifth component is in the range of 5% by weight to 50% by weight based on the weight of the liquid crystal composition.
11. The liquid crystal composition according to claim 1 , containing at least one polymerizable compound selected from the group of compounds represented by formula (6) as an additive component:
wherein, in formula (6), ring K and ring M are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine-2-yl or pyridine-2-yl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring L is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 8 and Z 9 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —CO—, —COO— or —OCO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH—, —C(CH 3 )═CH—, —CH═C(CH 3 )— or —C(CH 3 )═C(CH 3 )—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine; P 1 , P 2 and P 3 are independently a polymerizable group; Sp 1 , Sp 2 and Sp a are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH— or and in the groups, at least one hydrogen may be replaced by fluorine or chlorine; g is 0, 1 or 2; h, j and k are independently 0, 1, 2, 3 or 4; and a sum of h, j and k is 1 or more.
12. The liquid crystal composition according to claim 11 , wherein, in formula (6), P 1 , P 2 and P 3 are independently a polymerizable group selected from the group of groups represented by formula (P-1) to formula (P-5):
wherein, in formula (P-1) to formula (P-5), M 1 , M 2 and M 3 are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine.
13. The liquid crystal composition according to claim 11 , containing at least one polymerizable compound selected from the group of compounds represented by formula (6-1) to formula (6-27) as the additive component:
wherein, in formula (6-1) to formula (6-27); P 4 , P 5 and P 6 are independently a polymerizable group selected from the group of groups represented by formula (P-1) to formula (P-3);
wherein, in formula (P-1) to formula (P-3), M 1 , M 2 and M 3 are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine; and in formula (6-1) to formula (6-27), Sp 1 , Sp 2 and Sp a are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH— or —C═C—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine.
14. The liquid crystal composition according to claim 11 , wherein a proportion of addition of the additive component is in the range of 0.03% by weight to 10% by weight based on the weight of the liquid crystal composition.
15. A liquid crystal display device, including the liquid crystal composition according to claim 1 .
16. The liquid crystal display device according to claim 15 , wherein an operating mode in the liquid crystal display device includes an IPS mode, a VA mode, an FFS mode or an FPA mode, and a driving mode in the liquid crystal display device includes an active matrix mode.
17. A polymer sustained alignment mode liquid crystal display device, wherein the liquid crystal display device includes the liquid crystal composition according to claim 11 , or the polymerizable compound in the liquid crystal composition is polymerized.