Patent ID: 7608310

Claim:
A liquid crystal composition having a negative dielectric anisotropy and comprising a first component comprising at least one compound selected from the group of compounds represented by formulas (1-1) to (1-3) and a second component comprising at least one compound selected from the group of compounds represented by formulas (2-1) to (2-3): wherein, in formulas (1-1) to (1-3) and formulas (2-1) to (2-3), R 11 and R 12 are independently alkyl, alkenyl or alkoxy; ring A 11 is independently 2-fluoro-1,4-phenylene or 3-fluoro-1,4-phenylene; ring A 12 is independently 1,4-cyclohexylene or 1,4-phenylene; ring A 13 is independently 1,4-cyclohexylene or 1,4-phenylene, arbitrary hydrogen of which may be replaced by fluorine or chlorine; and Z 11 and Z 12 are independently a single bond, —C 2 H 4 —, —CH 2 O— or —OCH 2 —, provided that a compound represented by formula (1-2), wherein ring A 11 is 2-fluoro-1,4-phenylene, ring A 12 is 1,4-phenylene, and Z 11 and Z 12 are single bonds, and a compound represented by formula (1-3), wherein ring A 11 is 3-fluoro-1,4-phenylene, ring A 12 is 1,4-phenylene, and Z 11 and Z 12 are single bonds, are excluded.