| 摘要 |
To show a liquid crystal composition satisfying at least one or having a suitable balance regarding at least two of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of the nematic phase, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy, large specific resistance, high stability to ultraviolet light and heat; an AM device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio and a long service life.;The liquid crystal composition contains a compound contributing to high stability to heat or ultraviolet light, has negative dielectric anisotropy and has a nematic phase, and may contain a specific compound having high negative dielectric anisotropy as a first component, a specific compound having a high maximum temperature or small viscosity as a second component, and a specific compound having a polymerizable group. |
| 主权项 |
1. A liquid crystal composition that has a negative dielectric anisotropy and a nematic phase, and contains at least one compound selected from the group of compounds represented by formula (1): wherein, in formula (1), R1, R2, R4, R5, R6, R7, R9 and R10 are independently hydrogen or alkyl having 1 to 4 carbons; R3 and R8 are independently hydrogen or alkyl having 1 to 15 carbons; ring A is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, 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, decahydronaphthalene-2,6-diyl, dihydropyran-2,5-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 piece of hydrogen may be replaced by halogen, alkyl having 1 to 5 carbons, alkoxy having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one piece of hydrogen is replaced by halogen; Z1 and Z2 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH2— may be replaced by —O—, at least one piece of —CH2—CH2— may be replaced by —CH═CH— or —C≡C—, and in the groups, at least one piece of hydrogen may be replaced by fluorine; and a is 1, 2 or 3. |
