Patent ID: 8603594

Claim:
A liquid crystal composition has a nematic phase comprising a mixture of a least one compound selected from the group of compounds represented by formula (1-1-1), at least one compound selected from the group of compounds represented by and formula (1-1-2), at least one compound selected from the group of compounds represented by formula (1-2), and at least one compound selected from the group of compounds represented by formula (1-3-1) and formula (1-3-2) as a first component, and at least one compound selected from the group of compounds represented by formula (2) as a second component: wherein R 1 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R 2 and R 3 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or 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 independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; Z 5 and Z 6 are independently a single bond, ethylene or carbonyloxy; X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 and X 8 are independently hydrogen or fluorine; and Y 1 is fluorine, chlorine or trifluoromethoxy; and m is 0, 1 or 2.