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    • 47. 发明授权
    • Liquid-crystalline dielectrics
    • 液晶电介质
    • US4755323A
    • 1988-07-05
    • US839293
    • 1986-03-13
    • Rudolf EidenschinkGeorg Weber
    • Rudolf EidenschinkGeorg Weber
    • C07D319/00C07D319/12C07D405/04C07D405/06C07D405/12C09K19/34C07D405/00C07D409/00C07D411/00G02F1/13
    • C09K19/3402C07D319/12C09K2019/3422
    • New 1,4-dioxanes of the formula I ##STR1## wherein R.sup.1 and R.sup.2 each signify and alkyl group with 1 - 10 C-atoms, wherein one or two CH.sub.2 groups can also be replaced by O-atoms, F, Cl, Br or CN,R.sup.2 also H,A.sup.1 and A.sup.2 each signify 1,4-phenylene, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,4-dioxane-2,5-diyl, peperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene or pyrimidine-2,5-diyl groups, unsubstituted or substituted by 1 - 4 F-atoms,Z.sup.1 and Z.sup.2 each signify --CO--O--, --O--CO--, CH.sub.2 CH.sub.2 --, OCH.sub.2 -- --CH.sub.2 O-- or a single bond,m and n each signify 0, 1, 2 or 3,(m+n), however, are at least 1 and at most 3,whereby for m=2 or 3, the groups A.sup.1 and for n=2 or 3 the groups A.sup.2 can each be the same or different from one another,as well as the acid-addition salts of the basic ones of these compounds,are suitable for use as components of liquid-crystalline dielectrics.
    • 其中R 1和R 2各自表示的具有1-10个C原子的烷基,其中一个或两个CH 2基团也可被O原子,F,Cl, Br或CN,R2还有H,A1和A2各自表示1,4-亚苯基,1,4-亚环己基,1,3-二恶烷-2,5-二基,1,4-二恶烷-2,5-二基,哌啶 -1,4-二基,1,4-二环(2,2,2) - 亚辛基或嘧啶-2,5-二基,未取代或被1-4个F原子取代,Z1和Z2各自表示-CO- O-,-O-CO-,CH 2 CH 2 - ,OCH 2 -CH 2 O-或单键,m和n各自表示0,1,2或3,(m + n),然而,至少为1以上 3,其中对于m = 2或3,基团A1和n = 2或3,基团A2可以彼此相同或不同,以及这些化合物中的碱性基团的酸加成盐, 适用于液晶电介质的组分。
    • 50. 发明授权
    • Electrooptical display element
    • 电光显示元件
    • US5288427A
    • 1994-02-22
    • US815832
    • 1991-12-24
    • Georg WeberBernhard ScheubleRudolf EidenschinkAndreas Wachtler
    • Georg WeberBernhard ScheubleRudolf EidenschinkAndreas Wachtler
    • C09K19/30C09K19/34C09K19/52
    • C09K19/3402C09K19/3001C09K19/3098C09K19/3491C09K2019/3422
    • Compounds of the formula IR.sup.1 --A.sup.1 --Z.sup.1 --A--O--R.sup.2in whichR.sup.1 and R.sup.2, independently of one another, are each alkyl having 1 to 9 C atoms, in which, in addition, one or two CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--, where two O atoms are not linked directly to one anther, or one of the two groups R.sup.1 and R.sup.2 is alternatively H,Z.sup.1 is --CH.sub.2 --O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond,A.sup.1 is trans-1,4-cyclohexylene in which, in addition one or two nonadjacent CH.sub.2 groups may be replaced by O and/or S, or 1,4-cyclohexenylene, andA is unsubstituted or fluorine-substituted 1,4-phenylene, can be used as components of liquid-crystalline dielectrics containing at least three liquid-crystalline compounds for shortening the switch-on time T.sub.on of electrooptical display elements based on a TN cell on switching the voltage from a first voltage below or approximately at the threshold voltage to a second voltage on the increase of the electrooptical characteristic line.
    • 其中R 1和R 2彼此独立地为具有1至9个C原子的烷基的式I R1-A1-Z1-AO-R2的化合物,其中另外一个或两个CH 2基团可以被 -O-,-CO-,-O-CO-,-CO-O-和/或-CH = CH-,其中两个O原子不直接连接到一个花药,或者两个基团R1和R2之一是 或者H,Z 1是-CH 2 -O - , - OCH 2 - , - CH 2 CH 2 - 或单键,A 1是反式-1,4-亚环己基,其中一个或两个不相邻的CH2基团可被O和/ 或S或1,4-亚环己烯基,A为未取代的或氟取代的1,4-亚苯基,可用作含有至少三种液晶化合物的液晶电介质的组分,以缩短接通时间Ton 基于TN单元的电光显示元件在电压特性线的增加时将电压从低于或接近阈值电压的第一电压切换到第二电压。