申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0259995A1
公开(公告)日:1988-03-16
A compound having ferroelectric liquid crystal properties of the formula:
wherein A is the residue of a liquid crystal material or a liquid crystal compatible material;
X is 0 or S;
n is 0 or 1;
Y is any inert group which does not cause the melting point of the compound of Formula I to exceed 200°C;
R1 is selected from H, C1-4-alkyl and halogen; and
R2 is C1-4-alkyl or halogen;
provided that R1 and R2 are different. In a suitable environment the compound is capable of alignment in two metastable states and is therefore suitable for use in multiplex-addressed, liquid crystal devices, such as flat bed large area screens and displays.
一种具有铁电液晶特性的化合物,其式如下
其中 A 是液晶材料或液晶兼容材料的残留物;
X 是 0 或 S
n 是 0 或 1;
Y 是任何惰性基团,不会导致式 I 化合物的熔点超过 200℃;
R1 选自 H、C1-4-烷基和卤素;以及
R2 是 C1-4-烷基或卤素;
条件是 R1 和 R2 不同。在合适的环境中,该化合物能够以两种析出状态排列,因此适用于多址液晶设备,如平板大面积屏幕和显示器。