Patent ID: 7976912

Claim:
A liquid crystal composition having a nematic phase that includes two components, wherein the first component is at least one 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 formulae (2-1), (2-2) and (2-3): wherein R 1 and R 4 are 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 alkyl having 1 to 12 carbons, or alkenyl having 2 to 12 carbons; ring A is independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, or 3,5-difluoro-1,4-phenylene; Z 1 is a single bond or ethylene; X 1 and X 2 are each independently hydrogen or fluorine; k is 1 or 2.