Patent ID: 7498067

Claim:
A liquid crystal composition having a negative dielectric anisotropy and comprising three components, wherein the first component is at least one compound selected from the group of compounds represented by formula (1), the second component is at least one compound selected from the group consisting of compounds represented by formulas (2-a), (2-b) and (2-c), and the third component is at least one compound selected from the group consisting of compounds represented by formula (3): wherein: R 2 , R 3 and R 6 are each independently alkyl or alkenyl; R 1 , R 4 , R 5 and R 7 are each independently alkyl, alkenyl, or alkoxy; Ring B, ring C, ring D, ring E, ring G, ring H, ring I and ring L are each independently 1,4-cyclohexylene or 1,4-phenylene; Ring J and ring K are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 3-fluoro-1,4-phenylene; Z 1 , Z 2 , Z 3 , Z 4 , Z 5 , Z 6 and Z 7 are each independently a single bond, —(CH 2 ) 2 —, —CH 2 O—, or —OCH 2 —; one of X 1 and X 2 is independently fluorine, and the other thereof is independently chlorine; and l, m, n, o and p are each independently 0 or 1, provided that l+m+n+o is 1 or 2.