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    • 12. 发明授权
    • Bistable twisted nematic mode reflective liquid crystal display
    • 双稳态扭转向列模式反射液晶显示
    • US06469768B1
    • 2002-10-22
    • US09292277
    • 1999-04-15
    • Sin-Doo Lee
    • Sin-Doo Lee
    • C09K1902
    • G02F1/1391C09K19/0208G02F2001/133638G02F2203/02
    • A liquid crystal display includes front and rear insulating substrates, each having inner and outer surfaces. The inner surface of the rear substrate faces the inner surface of the front substrate. A transparent electrode is formed on the inner surface of the front substrate, and a mirror electrode made with a reflective material is formed on the inner surface of the rear substrate. A polarizer is attached on the outer surface of the front substrate, and homogeneously aligning films are coated on the transparent and the mirror electrodes, followed by rubbing unidirectionally. A liquid crystal layer is interposed between the homogeneously aligning films on the two substrates. The liquid crystal layer is composed of a nematic liquid crystal material which has positive dielectric anisotropy and a chiral dopant to have a twisted structure. The molecular director in the liquid crystal layer is initially in the &pgr;-twisted state. When a high reset voltage is applied to the liquid crystal display, the molecular director is rearranged in a homeotropically deformed state. A selection voltage lower than the reset voltage is applied to obtain one of the zero-twisted state and the &pgr;-twisted state. Thereafter, a data voltage is applied for enhancing electro-optic characteristics.
    • 液晶显示器包括前后绝缘基板,每个具有内表面和外表面。 后基板的内表面面向前基板的内表面。 在前基板的内表面上形成透明电极,在后基板的内表面上形成由反射材料制成的反射镜电极。 偏振片安装在前基板的外表面上,均匀取向膜涂覆在透明镜和反射镜电极上,然后单向摩擦。 液晶层插入在两个基板上的均匀取向膜之间。 液晶层由具有正介电各向异性的向列型液晶材料和具有扭曲结构的手性掺杂剂构成。 液晶层中的分子导向器最初处于π扭曲状态。 当向液晶显示器施加高的复位电压时,分子导向器以垂直方向变形的状态被重新排列。 施加低于复位电压的选择电压以获得零扭曲状态和弯曲状态之一。 此后,施加数据电压以增强电光特性。
    • 20. 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。