Patent ID: 7871539

Claim:
A liquid crystal composition, comprising: a liquid crystal; and a chiral dopant which is a compound in which a liquid crystalline group represented by the following Formula (1) is bonded to a rigid optically active compound: T 1 -(D 2 ) k ((L 1 ) f (D 1 ) e ) m -((L 2 ) g -(CH 2 ) i ) t —*1 Formula (1) wherein *1 indicates a bonding position with the optically active compound; D 1 and D 2 each independently represent an arylene group, a heteroarylene group, or a divalent cyclic aliphatic hydrocarbon group; L 1 and L 2 each represent a divalent linking group; T 1 represents an alkyl group, an alkoxy group, an alkoxy carbonyl group, an acyl group, an acyloxy group, a halogen atom or a cyano group; e represents an integer of from 1 to 3; f represents an integer of from 0 to 2; m represents an integer of from 1 to 3; k represents 1 or 2; g represents 0 or 1; i represents an integer of from 0 to 20; t represents an integer of from 1 to 4; the total number of groups represented by D 1 and D 2 is an integer of from 2 to 5; when e is 2 or more, the 2 or more of D 1 may be the same as or different from each other; when k is 2, the two groups represented by D 2 may be the same as or different from each other; when m is 2 or more, the 2 or more of ((L 1 ) f -(D 1 ) e ) may be the same as or different from each other; when f is 2 or more, the 2 or more of L 1 represent different linking groups; (g+i)×t is an integer of from 1 to 40; and when t is 2 or more, the 2 or more of ((L 2 ) g -(CH 2 ) i ) may be the same as or different from each other, wherein the rigid optically active compound is a compound represented by the following Formula (2): wherein, in Formula (2), each of R 1 to R 4 represents a substituent group; at least one of R 1 , R 2 , R 3 and R 4 represents the liquid crystalline group represented by Formula (1); a carbon atom bound to the liquid crystalline group is an asymmetric carbon; A 1 to A 3 respectively represent a carbon atom; and the bond which connects A 1 and A 2 and the bond which connects A 2 and A 3 respectively represent a single bond or a double bond.