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    • 1. 发明授权
    • Paper white PDLC system
    • 纸白色PDLC系统
    • US5604612A
    • 1997-02-18
    • US387850
    • 1995-02-24
    • David CoatesPatrick NolanEwald Ginter
    • David CoatesPatrick NolanEwald Ginter
    • G02F1/137C09K19/02C09K19/54G02F1/1333G02F1/1334G02F1/1335
    • G02F1/1334C09K19/544
    • The invention relates to a paper white PDLC system which 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 n.sub.M, the transmission of which can be varied by applying an electrical voltage characterized in that the PDLC film exhibits the following properties:.vertline.n-n.sub.M .vertline..gtoreq.0.05wherein n is the mean refractive index of the liquid crystal mixture defined vian.sup.2 =1/3(m.sub.e.sup.2 +2n.sub.o.sup.2)mean droplet diameter.ltoreq.2 .mu.mthickness of PDLC film 5 .mu.m.ltoreq.d.ltoreq.75 .mu.mdegree of backscatter.gtoreq.20%
    • PCT No.PCT / EP93 / 02145 Sec。 371日期:1995年2月24日 102(e)日期1995年2月24日PCT提交1993年8月12日PCT公布。 出版物WO94 / 04958 日期:1994年3月3日本发明涉及一种白色PDLC系统,其在2个电极层之间包含PDLC膜,该PDLC膜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,其中液晶的折射率之一 混合物与聚合物基质nM的折射率匹配,其透过率可以通过施加电压而变化,其特征在于PDLC膜具有以下性质:| + E,ovs + + - 0.05,其中+ E,ovs n + EE是通过+ E定义的液晶混合物的平均折射率,ovs n + EE 2 = + E,fra 1/3 + EE(me2 + 2no2)平均液滴直径< 2μm厚度的PDLC膜5微米d =75μm反向散射度/ 20%
    • 4. 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。
    • 9. 发明授权
    • Electrooptical liquid crystal system containing dual frequency liquid
crystal mixture
    • 含有双频液晶混合物的电光液晶体系
    • US5621552A
    • 1997-04-15
    • US199193
    • 1994-02-28
    • David CoatesPatrick Nolan
    • David CoatesPatrick Nolan
    • C09K19/54G02F1/1334H01L29/04
    • C09K19/544G02F1/1334
    • The invention relates to an electrooptical liquid crystal systemwhich contains a dual frequency liquid crystal mixture and a further optically transparent polymeric medium between two electrode layers which optionally may be attached to substrates,in which the ordinary refractive index of the liquid crystal mixture essentially agrees with the refractive index of the polymeric medium n.sub.m and/or in which the quotient of the mass of the liquid crystal mixture and of the mass of the polymeric medium is 1.5 or more,which has a reduced transmission in the on-state compared to the off-state, andwhich is obtained by polymerization of a composition containing the dual frequency liquid crystal mixture and a precursor of the polymeric medium,characterized in that an electrical field is applied during the curing process which exhibits a frequency below the cross-over frequency of the dual frequency liquid crystal mixture so that the molecules of the dual frequency liquid crystal mixture are aligned essentially into the direction of the electrical field.
    • PCT No.PCT / EP92 / 01872 Sec。 371日期1994年2月28日 102(e)日期1994年2月28日PCT提交1992年8月17日PCT公布。 出版物WO93 / 05436 日期1993年3月18日本发明涉及一种电光学液晶系统,其包含双频液晶混合物和两个电极层之间的另外的光学透明聚合物介质,其可任选地附着到基底上,其中液体的常规折射率 晶体混合物基本上与聚合物介质nm的折射率一致,和/或其中液晶混合物的质量和聚合物介质的质量的商为1.5或更大,其中, 状态,其是通过聚合包含双频液晶混合物和聚合物介质的前体的组合而获得的,其特征在于在固化过程期间施加电场,其表现出低于 双频液晶混合物的交叉频率使得双频液体的分子发生哭泣 大部分混合物基本上与电场方向排列。
    • 10. 发明授权
    • Electrooptical liquid crystal system
    • 电光液晶系统
    • US5476611A
    • 1995-12-19
    • US41422
    • 1993-03-31
    • Patrick NolanDavid Coates
    • Patrick NolanDavid Coates
    • C09K19/30C09K19/34C09K19/52C09K19/54G02F1/13G02F1/1333G02F1/1334C09K19/12
    • C09K19/544G02F1/1334
    • An electrooptical system containing a PDLC film is disclosed. The precursor of the PDLC film comprises(a) 30-85 wt. % of a liquid crystal mixture containing one or more compounds of the formula I ##STR1## wherein R, Z.sup.1, Z.sup.2, A.sup.1, A.sup.2, X.sup.2, X.sup.2, Q, n and Y are as defined herein,(b) 15-68 wt. % of the precursor of the polymer matrix at least comprisinga component A containing at least 5 wt. % of one or more at least difunctional thiol monomers and/or oligomers,a component B containing at least 10 wt. % of one or more at least difunctional monomers and/or oligomers of the ene type,a component C containing at least 3 wt. % of one or more monofunctional monomers and/or oligomers of the ene type with a molar mass of less than 250 g/mol,optionally a component D containing polymerizable compounds other than ene-type or thiol-type compounds; and(c) 0.1-5 wt. % of a radical photoinitiator, with the mass ratios given under (a), (b) and (c) being related to the mass of the precursor of the PDLC film and the mass ratios of the components A, B and C relating to the mass of the precursor of the polymer matrix.
    • 公开了一种含有PDLC膜的电光系统。 PDLC膜的前体包含(a)30-85wt。 含有一种或多种式I的化合物的液晶混合物,其中R,Z 1,Z 2,A 1,A 2,X 2,X 2,Q,n和Y如本文所定义,(b)15-68重量% 。 所述聚合物基质的前体的%至少包含含有至少5wt。 %的一种或多种至少双官能的硫醇单体和/或低聚物,组分B含有至少10wt。 %的一种或多种至少双官能单体和/或烯类的低聚物,组分C含有至少3wt。 %的一种或多种单体官能单体和/或低聚物,其摩尔质量小于250g / mol,任选地含有除ene型或硫醇型化合物之外的可聚合化合物的组分D; 和(c)0.1-5wt。 自由基光引发剂的%,(a),(b)和(c)给出的质量比与PDLC膜的前体的质量和与组分A,B和C有关的组分A,B和C的质量比 质量的聚合物基质的前体。