Electro-optical modulator
    66.
    发明授权
    Electro-optical modulator 失效
    电光调制器

    公开(公告)号:US4214819A

    公开(公告)日:1980-07-29

    申请号:US955288

    申请日:1978-10-27

    CPC分类号: G02F1/13768 Y10S359/90

    摘要: The optically active medium of an electro-optical cell sandwiched between a pair of crossed polarizers is a thin layer of liquid crystal with a positive dielectric anisotropy and a negative anisotropy of the diamagnetic susceptibility. The medium is positioned between two planar transparent electrodes across which a potential difference establishes, in the liquid crystal layer, an electric field perpendicular to the electrode layers. A magnet is provided for establishing in the medium a magnetic field that has a predetermined orientation relative to the electric field. When both fields are parallel, the threshold voltage of the cell is increased. The presence of such a magnetic field, when the electric field is switched off, reduces the turn-off time of the cell. When the fields are perpendicular to each other, the color of the display can be controlled in accordance with the magnitude of the magnetic field.

    摘要翻译: 夹在一对交叉偏振器之间的电光学单元的光学活性介质是具有正的介电各向异性和反向磁化率的负各向异性的薄层液晶。 介质位于两个平面透明电极之间,电位差在液晶层中形成垂直于电极层的电场。 提供磁体用于在介质中建立相对于电场具有预定取向的磁场。 当两场并联时,电池的阈值电压就会增加。 当电场被关闭时,存在这样的磁场减少了电池的关断时间。 当场彼此垂直时,可以根据磁场的大小来控制显示器的颜色。

    Liquid crystalline dielectric composition
    67.
    发明授权
    Liquid crystalline dielectric composition 失效
    液晶电介质组合物

    公开(公告)号:US4077900A

    公开(公告)日:1978-03-07

    申请号:US775671

    申请日:1977-03-08

    IPC分类号: C09K19/56 G02F1/13 C09K3/34

    CPC分类号: C09K19/56

    摘要: A liquid crystalline dielectric composition contains 0.001-5% by weight of a monocyclic or bicyclic amino compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 each are hydrogen or collectively are CH.sub.2 --(CH.sub.2 --Z--CH.sub.2).sub.p --CH.sub.2 ; X is --CH.sub.2 or --CO--; Y is --Z--CH.sub.2 --CH.sub.2 -- or ##STR2## Z is O, S, or NH; m and n are 0, 1 or 2; p is 1, 2 OR 3; OR AN ACID ADDITION SALT OR METAL SALT CHELATE COMPLEX THEREOF.

    摘要翻译: 液晶电介质组合物含有0.001-5重量%的下式的单环或双环氨基化合物,其中R 1和R 2各自为氢或共同为CH 2 - (CH 2 -Z-CH 2)p -CH 2; X是-CH 2或-CO-; Y是-Z-CH 2 -CH 2 - 或Z是O,S或NH; m和n分别为0,1或2; p为1,2 OR 3; 或酸添加盐或金属盐复合物。