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    • 134. 发明授权
    • Electrooptical liquid crystal system
    • 电光液晶系统
    • US5498365A
    • 1996-03-12
    • US104121
    • 1993-08-13
    • Patrick NolanDavid Coates
    • Patrick NolanDavid Coates
    • C09K19/02C09K19/12C09K19/20C09K19/30C09K19/34C09K19/42C09K19/54G02F1/13G02F1/1333C09K19/52
    • C09K19/544
    • An electrooptical systemwhich between 2 electrode layers contains a PDLC film comprising a liquid crystal mixture forming microdroplets in an optically isotropic, transparent polymer matrix,in which one of the refractive indices of the liquid crystal mixture is matched to the refractive index of the polymer matrix, andwhich in one of the two switching states has reduced transmission compared with the other state independent of the polarization of the incident light,characterized in that the precursor of the PDLC film comprisesa) 50-90 wt. % of a liquid crystal mixture containing one or more compounds of the formula I ##STR1## b) 15-49.5 wt. % of the precursor of the polymer matrix.
    • PCT No.PCT / EP93 / 01378 Sec。 371日期:1993年8月13日 102(e)日期1993年8月13日PCT提交1993年6月2日PCT公布。 公开号WO93 / 24589 日期为1993年12月9日。在2个电极层之间包含PDLC膜的电光学系统包含在光学各向同性的透明聚合物基质中形成微滴的液晶混合物,其中液晶混合物的折射率之一与 与独立于入射光的偏振的其他状态相比,在两种开关状态之一中的聚合物基质的折射率与传统方式相比减少,其特征在于PDLC膜的前体包含a)50-90wt 。 %的含有一种或多种式I的化合物的液晶混合物,b)15-49.5wt。 %的聚合物基质的前体。
    • 135. 发明授权
    • Electrooptical liquid-crystal system
    • 电光液晶系统
    • US5344587A
    • 1994-09-06
    • US687852
    • 1991-06-03
    • David CoatesShirley MardenGraham SmithUlrich FinkenzellerVolker ReiffenrathReinhard HittichStefan Wilhelm
    • David CoatesShirley MardenGraham SmithUlrich FinkenzellerVolker ReiffenrathReinhard HittichStefan Wilhelm
    • G02F1/13C09K19/00C09K19/12C09K19/30C09K19/42C09K19/44C09K19/54G02F1/133C09K19/52
    • C09K19/12C09K19/3003C09K19/3028C09K19/42C09K19/44C09K19/544
    • 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.
    • 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。