Patent ID: 8404151

Claim:
A liquid crystal composition having a nematic phase and comprising three components, wherein a first component is at least one compound selected from the group of compounds represented by formula (1), a second component is at least one compound selected from the group of compounds represented by formula (2), and a third component is at least one compound selected from the group of compounds represented by formula (3): wherein R 1 and R 2 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R 3 and R 4 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkoxymethyl having 2 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine; ring A, ring B and ring C are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene or tetrahydropyran-2,5-diyl; X 1 , X 2 , X 3 and X 4 are each independently hydrogen or fluorine; Y 1 is fluorine, chlorine or trifluoromethoxy; Z 1 is independently a single bond, ethylene or carbonyloxy; and m is 0, 1 or 2.