Patent ID: 8632696

Claim:
A liquid crystal composition that has a negative dielectric anisotropy and includes two components, wherein a first component is at least one compound selected from the group of compounds represented by formula (1), and a second component is at least two compounds selected from the group of compounds represented by formula (2), and wherein the ratio of the first component is in the range of approximately 5% to approximately 70% by weight and the ratio of the second component is in the range of approximately 5% to approximately 50% by weight, based on the total weight of the liquid crystal composition: wherein R 1 and R 2 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; R 3 and R 4 are each independently alkenyl having 2 to 12 carbons; ring A is independently 1,4-cyclohexylene or 1,4-phenylene; Z 1 is independently a single bond, ethylene, methyleneoxy or carbonyloxy; X 1 and X 2 are each independently fluorine or chlorine; m is 1, 2 or 3; Z 1 is ethylene, methyleneoxy or carbonyloxy when m is 1 and ring A is 1,4-cyclohexylene; Z 1 is independently ethylene, methyleneoxy or carbonyloxy when m is 2, two rings A are both 1,4-cyclohexylene.