申请人:Central Research Laboratories Limited
公开号:US05683623A1
公开(公告)日:1997-11-04
Dioxane derivatives for use as components in liquid crystal devices (LCDs) of general formula (A), wherein X is CH or B; R.sup.1, R.sup.2 are each A.sup.1, OA.sup.1, OCOA.sup.2, or COOA.sup.2 ; A.sup.1 is a straight or branched chain alkyl group containing from 1 to 20 carbon atoms and may be substituted with one or more F or CN. A.sup.2 is a straight or branched chain alkyl group containing from 1 to 20 carbon atoms and may be substituted with one or more F or CN and if straight may be unsubstituted. Y.sup.1, Y.sup.2, Y.sup.3 may each be (CH.sub.2).sub.p, (CH.sub.2).sub.p COO or OCO(CH.sub.2).sub.p ; p is from 0 to 10, n is 0 or 1, m is 0 or 1, either or both of Z.sub.1 and Z.sub.2 are F and, when not F, are H; Y.sup.4 is a covalent bond or, when n is 0, may be (a) LCDs, containing the devices exhibit very fast switching speed, bi-stable characteristics, enhanced greyscale and storage capabilities and a wide viewing angle.
二甲基亚砜衍生物可用作一般公式(A)中的液晶器件(LCD)的组分,其中X为CH或B;R.sup.1,R.sup.2分别为A.sup.1,OA.sup.1,OCOA.sup.2或COOA.sup.2;A.sup.1为含有1至20个碳原子的直链或支链烷基基团,可以被一个或多个F或CN取代。A.sup.2为含有1至20个碳原子的直链或支链烷基基团,可以被一个或多个F或CN取代,如果是直链,则可以是未取代的。Y.sup.1,Y.sup.2,Y.sup.3可以分别为(CH.sub.2).sub.p,(CH.sub.2).sub.p COO或OCO(CH.sub.2).sub.p;p为0至10,n为0或1,m为0或1,Z.sub.1和Z.sub.2中的一个或两个为F,当不为F时为H;Y.sup.4为共价键或当n为0时,可以为(a)。含有该器件的LCD具有非常快的开关速度、双稳特性、增强的灰度和存储能力以及广泛的视角。