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8 条记录 (耗时 0.019 秒)

    Electrooptical system
    1.
    发明授权
    Electrooptical system 失效

    公开(公告)号：US06327010B1

    公开(公告)日：2001-12-04

    申请号：US08769517

    申请日：1996-12-19

    申请人： Bernhard Scheuble ,  Günter Baur ,  Waltraud Fehrenbach ,  Barbara Staudacher

    发明人： Bernhard Scheuble ,  Günter Baur ,  Waltraud Fehrenbach ,  Barbara Staudacher

    IPC分类号： G02F11335

    CPC分类号： G02F1/13363 ,  G02F1/1396 ,  G02F2001/133531

    摘要： An electrooptical system contains: (a) a twisted nematic liquid-crystal layer, with an input side and an output side, which is positioned between a first substrate and a second substrate, each of whose inside surface is provided with an electrode coating and an alignment layer thereon, the director of said liquid crystal layer having a parallel edge alignment and a twist angle of 0°≦&bgr;≦1000, (b) at least one compensation layer for compensating the optical path difference of the liquid-crystal layer d·&Dgr;n, and (c) at least one device for linear polarization of light in such an arrangement that light, before entering and after exiting the liquid-crystal layer, passes through a polarization device, I. wherein, in order to achieve high contrast, and/or high brightness, and/or high viewing angle independence of the contrast and/or the color values, the angle &psgr;, which the polarization device on the input side of the liquid crystal layer forms with the director of the liquid-crystal molecules on the surface of the first substrate, satisfies I.A. condition (1) or (2) &psgr;=(&bgr;+90°)/2±10°  (1) &psgr;=&bgr;/2±10°  (2) where a polarization device is present on both the light input side of the liquid crystal layer and the light output side of the liquid crystal layer, and the polarization device on the output side of the liquid crystal layer is rotated by 90°±10° with respect to the polarization device on the input side of the liquid crystal layer, and, optionally, alignment of the polarization devices on the input side and the output side of the liquid crystal layer are interchanged, or satisfies I.B. condition (3) or (4) 30°≦&psgr;≦70° for 0≦&bgr;≦45°  (3) 35°≦&psgr;≦90° for 45≦&bgr;100°  (4), where a polarization device is only present on the input side, II. wherein the compensation layer comprises a material having three optical refractive indices, of which one is less than the other two, and wherein the optical axis corresponding to this lowest refractive index is essentially parallel to the surface of said second substrate or forms an angle of 2°

    Electrooptical display element using a supertwist liquid crystal having specified elastic constants
    3.
    发明授权
    Electrooptical display element using a supertwist liquid crystal having specified elastic constants 失效
    使用具有特定弹性常数的超扭曲液晶的电光显示元件

    公开(公告)号：US5188758A

    公开(公告)日：1993-02-23

    申请号：US352533

    申请日：1989-05-15

    申请人： Gunter Baur ,  Bernhard Scheuble ,  Waltraud Fehrenbach

    发明人： Gunter Baur ,  Bernhard Scheuble ,  Waltraud Fehrenbach

    IPC分类号： C09K19/02 ,  C09K19/42

    CPC分类号： C09K19/0208 ,  C09K19/02 ,  C09K19/42

    摘要： The invention relates to an electrooptical display element which can be multiplexed, has two support plates which, with an edging, form a cell containing a pneumatic liquid crystal material with positive dielectric anisotropy, and at least one chiral additive, and has a small surface tilt angle and a twist angle with a value between 150.degree. and 250.degree., wherein the ratio of the elastic constants for bending and twisting K.sub.3 /K.sub.2 of the liquid crystal material and the twist angle are such that when using liquid crystal material with the ratio of the elastic constants K.sub.3 /K.sub.1 for mending and spreading, which is in the order of the maximum possible, the steepness of the characteristic line is approved by the characteristic line is bi-stable or when using liquid crystal material with the ratio of the elastic constants K.sub.3 /K.sub.1 for bending and spreading either small enough or of the smallest order possible, the steepness of the characteristic line is improved but the characteristic line remains stable. The invention furthermore relates to a corresponding supertwist cell.

    摘要翻译： 本发明涉及一种可以复用的电光显示元件，具有两个支撑板，其具有边缘形成包含具有正介电各向异性的气动液晶材料的单元和至少一种手性添加剂，并且具有小的表面倾斜 角度和扭转角度在150°至250°之间的值，其中液晶材料的弯曲和扭曲K 3 / K 2的弹性常数与扭曲角的比值使得当使用比例为 用于修补和扩展的弹性常数K3 / K1（由最大可能的数量级）特征线的陡度被特性线所认可是双稳态的，或者当使用具有弹性常数比的液晶材料时 K3 / K1用于弯曲和扩展足够小或尽可能小的顺序，特征线的陡度提高，但特征线保持为st 能够。 本发明还涉及相应的超扭转电池。