Patent ID: 8449953

Claim:
A chiral dopant having the following formula: wherein X 1 and X 2 are independently wherein F is fluorine, m is a positive integer from 1 to 8, and n is a positive integer from 1 to 4; Y 1 and Y 2 are independently —O—, —CH 2 CH 2 —, —CH═CH—, —C(O)O—, or —CH 2 O—; and R 1 , R 2 are independently substituted or non-substituted C 1 -C 10 linear alkyl, wherein substituents of the substituted C 1 -C 10 linear alkyl are independently —F, —Cl, —OCF 3 , —NCS, or —CN, wherein a number of backbone carbon atoms in each of —Y 1 R 1 and —Y 2 R 2 is larger than 3.