Electrooptical liquid-crystal system
    8.
    发明授权
    Electrooptical liquid-crystal system 失效
    电光液晶系统

    公开(公告)号:US5344587A

    公开(公告)日:1994-09-06

    申请号:US687852

    申请日:1991-06-03

    摘要: The invention relates to an electrooptical liquid crystal systemwhich contains a dielectrically positive liquid crystal mixture and a further optically transparent medium between 2 electrodes which are optionally applied to substrate sheets,whose liquid crystal molecules in the switched-off state have an irregular orientation,in which one of the refractive indices of the liquid crystal mixture essentially agrees with the refractive index of the matrix n.sub.M and/or in which the quotient of the mass of the liquid crystal mixture and of the mass of the optically transparent medium is 1.5 or more and,which, independently of the polarization of the incident light, has a reduced transmission in one of the two switch states compared to the other state andwhose liquid crystal mixture contains one or more compounds of the formula I ##STR1## in which Q.sup.1 is ##STR2## are independently of one another trans-1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-l,4-phenylene, 3-fluoro-1,4-phenylene and one of A.sup.1 and, if present, A.sup.2, is also pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, tetrahydropyran-2,5-diyl or naphthalene-2,6-diyl,Z.sup.1 and Z.sup.2 are independently of one another a single bond, --CH.sub.2 CH.sub.2 --, --COO--, --OCO--, --C--C--, --CH.sub.2 O-- or any desired combinations of these bridge groups,Y and X are independently of one another H or F, and one of X and Y is also Cl,W is --CN, --Cl, --F, --CF.sub.3, --OCF.sub.3, --OCHF.sub.2, --NCS or R.sup.2R.sup.1 and R.sup.2 independently of one another are alkyl having 1-12 C atoms, in which one or 2 non-adjacent CH.sub.2 groups can also be replaced by --O-- or --HC.dbd.CH--, andm is 0, 1 or 2.

    摘要翻译: 本发明涉及一种电光学液晶体系,其包含介于两个电极之间的介电正极液晶混合物和另外的光学透明介质,所述两个电极任选地施加到基板上,所述基板在关闭状态下的液晶分子具有不规则取向, 液晶混合物的折射率之一基本上与基体nM的折射率一致,和/或其中液晶混合物的质量和光学透明介质的质量的商为1.5以上, ,其独立于入射光的偏振,与其他状态相比,在两种开关状态之一中具有减小的透射率,并且其液晶混合物含有一种或多种式I的化合物I I,其中Q1是 相对于反式-1,4-亚环己基,1,4-亚苯基,2-氟-1,4-亚苯基,3-氟-1,4-亚苯基, A1中的一个,如果存在,A2也是吡啶-2,5-二基,嘧啶-2,5-二基,1,3-二恶烷-2,5-二基,四氢吡喃-2,5-二基或萘 -2,6-二基,Z1和Z2彼此独立地为单键,-CH2CH2-,-COO-,-OCO-,-CC-,-CH2O-或这些桥基的任何所需组合,Y和X 独立地为H或F,X和Y中的一个也是Cl,W是-CN,-Cl,-F,-CF 3,-OCF 3,-OCHF 2,-NCS或R 2 R 1和R 2彼此独立地 是具有1-12个C原子的烷基,其中一个或两个不相邻的CH 2基团也可被-O-或-HC = CH-取代,m是0,1或2。

    2,3-difluorobiphenyls
    9.
    发明授权
    2,3-difluorobiphenyls 失效
    2,3-DIFLUOROBIPHENYLS

    公开(公告)号:US5204019A

    公开(公告)日:1993-04-20

    申请号:US362470

    申请日:1989-05-15

    摘要: 4-Q.sup.1 -4'-Q.sup.2 -2,3-Difluorobiphenyls whereinQ.sup.1 and Q.sup.2 independently of one another are each R or R-A.sup.1 -A.sup.2 -Z in whichR (sic) alkyl having 1-15 C atoms or alkenyl having 3-15 C atoms each of which is unsubstituted or monosubstituted by cyano or at least monosubstituted by fluorine or chlorine, and in which in each case one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --CO--, --O--CO, --CO--O-- or --O--COO--, (sic) --COO--, --O--CO--, --CH.sub.2 O, --O--CH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond, andA.sup.1 and A.sup.2 independently of one another . . (sic) each 1,4-phenylene which is unsubstituted or substituted by one or two fluorine atoms, and in which one or two CH groups can also be replaced by N, or trans-1,4-cyclohexylene wherein one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, and one of the two groups A.sup.1 and A.sup.2 can also be a single bond,subject to the proviso that Z is --CO--O, --O--CO--, --CH.sub.2 O--, --OCH.sub.2 -- or --CH.sub.2 CH.sub.2 --, if one of the groups Q.sup.1 or Q.sup.2 is alkyl or alkoxy and the other group Q.sup.1 or Q.sup.2 is R-A.sup.1 -A.sup.2 -Z wherein one of the two groups A.sup.1 and A.sup.2 is a single bond, are suitable for use as components of liquid-crystal media.

    摘要翻译: PCT No.PCT / EP89 / 00180 Sec。 371日期:1989年5月15日 102(e)日期1989年5月15日PCT提交1989年2月27日PCT公布。 出版物WO89 / 08687 日本9月21日1989.4-Q1-4'-Q2-2,3-二氟联苯,其中Q1和Q2彼此独立地为R或R-A1-A2-Z,其中R(sic)烷基具有1-15个碳原子 具有3-15个碳原子的原子或烯基,其各自为未取代的或被氰基单取代或至少被氟或氯单取代,并且其中在每种情况下一个或两个不相邻的CH 2基团也可以被-O-, -CO - , - O-CO,-CO-O-或-O-COO-,(sic)-COO-,-O-CO-,-CH2O,-O-CH2-,-CH2CH2-或单键 ,A1和A2彼此独立。 。 (sic)未取代或被一个或两个氟原子取代的每个1,4-亚苯基,其中一个或两个CH基团也可以被N或反式-1,4-亚环己基代替,其中一个或两个非 - 相邻的CH2基团也可以被-O-取代,并且两个基团A1和A2之一也可以是单键,条件是Z是-CO-O,-O-CO-,-CH2O-, -OCH 2 - 或-CH 2 CH 2 - ,如果基团Q1或Q2中的一个为烷基或烷氧基,另一个基团Q1或Q2为两个基团A1和A2之一为单键的R-A1-A2-Z, 适合用作液晶介质的组分。

    Electrooptical liquid crystal system
    10.
    发明授权
    Electrooptical liquid crystal system 失效
    电光液晶系统

    公开(公告)号:US5958290A

    公开(公告)日:1999-09-28

    申请号:US392682

    申请日:1995-02-23

    摘要: The invention relates to an electrooptical liquid crystal systemwhich contains a dielectrically positive liquid crystal mixture and a further optically transparent medium between 2 electrodes which are optionally applied to substrate sheets,whose liquid crystal molecules in the switched-off state have an irregular orientation,in which one of the refractive indices of the liquid crystal mixture essentially agrees with the refractive index of the matrix n.sub.M and/or in which the quotient of the mass of the liquid crystal mixture and of the mass of the optically transparent medium is 1.5 or more and,which, independently of the polarization of the incident light, has a reduced transmission in one of the two switch states compared to the other state andwhose liquid crystal mixture contains one or more compounds of the formula I ##STR1## in which Q.sup.1 is ##STR2## are independently of one another trans-1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene and one of A.sup.1 and, if present, A.sup.2, is also pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, tetrahydropyran-2,5-diyl or naphthalene-2,6-diyl,Z.sup.1 and Z.sup.2 are independently of one another a single bond, --CH.sub.2 CH.sub.2 --, --COO--, --OCO--, --C.tbd.C--, --CH.sub.2 O-- or any desired combinations of these bridge groups,Y and X are independently of one another H or F, and one of X and Y is also Cl,W is --CN, --Cl, --F, --CF.sub.3, --OCF.sub.3, --OCHF.sub.2, --NCS or R.sup.2R.sup.1 and R.sup.2 independently of one another are alkyl having 1-12 C atoms, in which one or 2 non-adjacent CH.sub.2 groups can also be replaced by --O-- or --HC.dbd.CH--, andm is 0, 1 or 2.

    摘要翻译: 本发明涉及一种电光学液晶体系,其包含介于两个电极之间的介电正极液晶混合物和另外的光学透明介质,所述两个电极任选地施加到基板上,所述基板在关闭状态下的液晶分子具有不规则取向, 液晶混合物的折射率之一基本上与基体nM的折射率一致,和/或其中液晶混合物的质量和光学透明介质的质量的商为1.5以上, ,其独立于入射光的偏振,与其他状态相比,在两种开关状态之一中具有降低的透射率,并且其液晶混合物含有一种或多种式I的化合物,其中Q1独立地为一个 另一个反式-1,4-亚环己基,1,4-亚苯基,2-氟-1,4-亚苯基,3-氟-1,4-亚苯基和A1中的一个,如果 t,A2也是吡啶-2,5-二基,嘧啶-2,5-二基,1,3-二恶烷-2,5-二基,四氢吡喃-2,5-二基或萘-2,6-二基, Z 1和Z 2彼此独立地是单键,-CH 2 CH 2 - , - COO - , - OCO-, - C 3BOND C - , - CH 2 O-或这些桥基的任何所需组合,Y和X彼此独立地 H或F,X和Y中的一个也是Cl,W是-CN,-Cl,-F,-CF 3,-OCF 3,-OCHF 2,-NCS或R 2,R 1和R 2彼此独立地是具有1- 12个C原子,其中一个或两个不相邻的CH2基团也可以被-O-或-HC = CH-取代,m是0,1或2。