Patent ID: 8071182

Claim:
A liquid crystal composition that has the nematic phase, comprising two components, wherein the first component is at least one optically active compound selected from the group of compounds represented by formula (1), and the second component is at least one compound selected from the group of compounds represented by formula (2): wherein R 1 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which arbitrary hydrogen is replaced by fluorine; R 2 and R 3 are each different and are alkyl having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R 4 and R 5 are each independently alkyl having 1 to 12 carbons, alkoxy having 1 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 and ring B are each independently 1,4-cyclohexylene or 1,4-phenylene; ring C, ring D, ring E and ring F are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; and Z 1 , Z 2 and Z 3 are each independently a single bond, ethylene or carbonyloxy.