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    • 2. 发明授权
    • Liquid crystal light modulators with asymmetrical interfaces
    • 具有不对称接口的液晶光调制器
    • US5040876A
    • 1991-08-20
    • US490155
    • 1990-03-07
    • Jayantilal S. PatelSin-Doo Lee
    • Jayantilal S. PatelSin-Doo Lee
    • G02F1/1337G02F1/139
    • G02F1/1337G02F1/1393
    • Liquid crystal devices whose light transmission properties are respectively responsive to the polarity of an applied voltage enable the realization of high-speed modulators useful for communication and display purposes. Such a polar effect is achieved by establishing asymmetrical interfacial interactions between the surfaces of a liquid crystal layer and alignment layers disposed in respective contact with the surfaces. Asymmetry is introduced in the form of either different anchoring strengths or different tilt angles for liquid crystal molecules at the two surfaces. In either case, both quiescently and in response to an electric field applied perpendicular to the surfaces of the liquid crystal layer, the contour of the longitudinal axes of the molecules is thereby established to have different curvatures, each less than about 45 degrees, at the two surfaces.
    • 其透光性能分别响应于所施加电压的极性的液晶装置能够实现用于通信和显示目的的高速调制器。 通过在液晶层的表面和与表面分别接触的配向层之间建立不对称界面相互作用来实现这种极性效应。 对于两个表面的液晶分子,以不同的锚固强度或不同倾斜角的形式引入不对称性。 在任一种情况下,静态地并且响应于垂直于液晶层的表面施加的电场,因此分子的纵轴的轮廓被建立为具有不同的曲率,每个小于约45度,在 两个表面。
    • 7. 发明授权
    • Non-chiral smectic C liquid crystal display
    • 非手性近晶C液晶显示
    • US5781265A
    • 1998-07-14
    • US736200
    • 1996-10-22
    • Sin-Doo Lee
    • Sin-Doo Lee
    • G02F1/133G02F1/13G02F1/1333G02F1/1335G02F1/137G02F1/141G02F1/139G02F1/1337
    • G02F1/13781
    • A liquid crystal display according to this invention has a pair of transparent electrodes, a non-chiral smectic liquid crystal therebetween, a polarizer and an analyzer which are attached to the electrodes. The smectic layers are perpendicular to the electrodes and the liquid crystal has a twisted structure where the twist angle is twice the molecular tilt angle. In this configuration, the molecular director is forced to continuously rotate along the cone surface formed by the requirement that the molecules are tilted with respect to the layer normal and pinned at the surfaces. The basic principles of the optical modulation in the present invention are similar to those in twist nematic liquid crystal structures.
    • 根据本发明的液晶显示器具有一对透明电极,它们之间的非手性近晶液晶,偏振器和分析器,其附接到电极。 近晶层垂直于电极,液晶具有扭转结构,其扭转角是分子倾斜角的两倍。 在这种结构中,分子导向器被迫沿着锥形表面连续旋转,锥形表面通过分子相对于层法线倾斜并被固定在表面上的要求而形成。 本发明的光调制的基本原理与扭曲向列型液晶结构相同。