Patent ID: 8025937

Claim:
A liquid crystal electro-optic device comprising: at least one liquid crystal cell comprising: a pair of substrates having a gap there between; a pair of electrodes, the pair of electrodes positioned on one of the substrates or one electrode positioned on each substrate; and a single liquid crystal material disposed in the gap between the pair of substrates, the liquid crystal material being a ferroelectric, oligosiloxane liquid crystal material exhibiting an I→SmC* phase sequence; wherein the ferroelectric, oligosiloxane liquid crystal material is selected from: where R═W, or C d H (2d+1) and d=1-10 and W= or a pyrimidine, or a tolane: where R′, and R″=are independently selected from C r H (2r+1) and r=1 to 4, or a phenyl group; c=1 to 10; n=3-14; a=0 or 1; m=1 or 2; s=1 or 2; q=0 or 1, where T=O, CH═N, N═CH, CF 2 O, OCF 2 , NHCO, or CONH; Y=is independently selected from, H, halogen, NO 2 , CN, CH 3 , CF 3 ; Q=O, COO, or OCO, where b=0 or 1; and X=an alkyl group with at least one chiral center or halo-substituted alkyl group with at least one chiral center; wherein the liquid crystal electro-optic device is bistable in operation.