| 摘要 |
A liquid crystal composition and an AM LCD device containing the same are described. The liquid crystal composition has a negative dielectric anisotropy, contains a specific compound having a negatively large dielectric anisotropy in a specific range of proportion as a first component, and a specific compound having a small viscosity as a second component, and may also contain a specific compound having a high maximum temperature or a small viscosity as a third component, a specific compound having a negative dielectric anisotropy as a fourth component, and/or a specific compound having a polymerizable group as an additive component. |
| 主权项 |
1. 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 and at least one compound selected from the group of compounds represented by formula (2) as a second component, wherein a proportion of the first component is in a range of 10 wt % to 40 wt % based on a weight of the liquid crystal composition:wherein in formula (1) and formula (2), R1 is alkenyl having 2 to 12 carbons; R2 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 halogen; R3 and R4 are independently alkyl 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 halogen, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by halogen; ring A is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, or tetrahydropyran-2,5-diyl, with a proviso that at least one ring A is tetrahydropyran-2,5-diyl; Z1 is a single bond, ethylene or carbonyloxy; and m is 2 or 3. |
