A process for controlling the cone tilt angle of a tilted smectic liquid crystal composition comprises the step of combining (a) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound comprising (i) an aliphatic fluorocarbon terminal portion comprising a terminal fluoroalkyl or fluoroether group and an alkylene group having at least two carbon atoms and containing at least one catenary ether oxygen atom, (ii) an aliphatic hydrocarbon terminal portion, and (iii) a central core connecting the terminal portions; and (b) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound; with the provisos that at least one of the compositions (a) and (b) comprises at least one chiral liquid crystal compound and that the combining of compositions (a) and (b) provides an optically active, tilted chiral smectic liquid crystal composition. The process enables control of cone tilt angle and thereby control of the brightness characteristics of liquid crystal display devices.
一种控制倾斜液晶体组成物锥体倾斜角度的过程,包括以下步骤:(a)至少组合一种液晶组成物,其中液晶组成物包括至少一种烷基
氟碳末端部分,其包括一个末端氟烷基或
氟醚基和至少两个碳原子的烷基基团,其中包含至少一个链醚氧原子,(ii)一种烷基烃末端部分,(iii)连接两个末端部分的中心核心;(b)至少组合一种液晶组成物,其中液晶组成物包括至少一种烷基烃或潜在烷基液晶化合物;但前提是至少其中一种组成物(a)和(b)包括至少一种手性液晶化合物,并且组合(a)和(b)组成具有光学活性的倾斜手性液晶体组成物。该过程能够控制锥体倾斜角度,从而控制液晶显示器件的亮度特性。