申请人:The Secretary of State for Defence in Her Britannic Majesty's Government
公开号:US06106908A1
公开(公告)日:2000-08-22
Liquid crystalline compounds useful in super twisted nematic liquid crystal displays are described and have the formula: ##STR1## wherein n is 1-5; m is 0-5; p is 0, 1 or 2; q is 0, 1 or 2 p+q is less than or equal to 3; A.sub.1, A.sub.2, A.sub.3 are independently chosen from 1,4-disubstituted benzene 2,5-disubstituted pyrimidine, 1,5-disubstituted pyridine, 2,6-disubstituted naphthalene which may be laterally substituted with F, Cl, Br or CN, trans-1,4-disubstituted cyclohexane 2,5-disubstituted dioxane, 2,5-disubstituted thiophene, 2,5-disubstituted furan, 2,5-disubstituted thiodiazole Z.sub.1 may be COO, OOC, OCH.sub.2, O; Z.sub.2, Z.sub.3 are independently chosen from a direct bond, COO, OOC, C.sub.2 H.sub.4, CH.sub.2 O, OCH.sub.2, C.sub.4 H.sub.8, C.sub.3 H.sub.6 O, (E)--CH.dbd.CHC.sub.2 H.sub.4, (E)--CH.dbd.CHCH.sub.2 O, --C.tbd.C--; R.sub.1 is alkyl, and may contain up to 20 carbon atoms and may be branched or a straight chain; provided that at least one of, A.sub.1, A.sub.2, A.sub.3 is selected from 1,4-disubstituted cyclochexane.
本文描述了在超扭曲向列型液晶显示器中有用的液晶化合物,其化学式为: ##STR1## 其中n为1-5; m为0-5; p为0、1或2; q为0、1或2; p+q小于或等于3; A.sub.1、A.sub.2、A.sub.3分别从1,4-二取代苯、2,5-二取代嘧啶、1,5-二取代吡啶、2,6-二取代萘(可以横向取代F、Cl、Br或CN)、反-1,4-二取代环己烷、2,5-二取代二噁烷、2,5-二取代噻吩、2,5-二取代呋喃、2,5-二取代噻二唑中独立选择;Z.sub.1可能为COO、OOC、OCH.sub.2、O;Z.sub.2、Z.sub.3独立选择自直接键、COO、OOC、C.sub.2 H.sub.4、CH.sub.2 O、OCH.sub.2、C.sub.4 H.sub.8、C.sub.3 H.sub.6 O、(E)--CH.dbd.CHC.sub.2 H.sub.4、(E)--CH.dbd.CHCH.sub.2 O、--C.tbd.C--;R.sub.1为烷基,可含有多达20个碳原子,可为支链或直链;但至少有一个A.sub.1、A.sub.2、A.sub.3是从1,4-二取代环己烷中选择的。