Patent ID: 8691111

Claim:
A liquid crystal composition comprising a chiral dopant compound represented by the following formula: wherein: R 1 , R 2 are independently aryl, alkyl, alkenyl, cycloalkyl, alkoxyaryl, alkaryl or heterocyclic all either substituted or unsubstituted, or combine to form a carbocyclic or heterocyclic ring; R 3 and R 4 are independently hydrogen, halogen, cyano, alkoxy, NHCOR 7 , NHSO 2 R 7 , COOR 7 , OCOR 7 , aryl, alkyl, alkenyl, cycloalkyl, alkoxyaryl, alkaryl or heterocyclic all either substituted or unsubstituted, or combine with either R 1 or R 2 to form a carbocylic or heterocyclic ring; R 5 and R 6 are independently hydrogen, CH 2 , CH, alkyl or aryl either substituted or unsubstituted, COOR 7 , or combine with L to form a carbocyclic or heterocyclic ring; R 7 is aryl, alkyl, alkenyl, cycloalkyl, alkoxyaryl or heterocyclic all either substituted or unsubstituted; L is the non-metallic elements required to form a carbocyclic or heterocyclic ring, or a single bond or a double bond; m is 1-3; n is 1-12.