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    • 6. 发明授权
    • Liquid crystal structure with improved black state, and projector using same
    • 具有改善黑色状态的液晶结构,投影机使用相同
    • US07057686B2
    • 2006-06-06
    • US10897456
    • 2004-07-23
    • Kenneth C. HoMinhua LuAlan E. RosenbluthKei-Hsiung Yang
    • Kenneth C. HoMinhua LuAlan E. RosenbluthKei-Hsiung Yang
    • G02F1/1335
    • H04N9/3105G02B27/283G02F1/134336G02F1/1396
    • A liquid crystal (LC) lightvalve comprising a twisted nematic LC layer whose molecules are aligned with pixel edges at the mirror backplane, thereby providing improved contrast and efficiency, and reduced visibility of post spacers in black state. The present invention is directed to an LC structure wherein the backplane is rubbed in a direction rectilinear with pixel edges. The LC layer is given the same twist rotation and birefringence as in the conventional TN lightvalve. Polarization control is maintained by illuminating the lightvalve with light whose polarization is rotated by the twist angle relative to the x,y, pixel axes, and by collecting the orthogonally polarized component of the reflected light. The lightvalve top glass is thus rubbed in a direction which is rotated by the twist angle from the horizontal or vertical direction at which the backplane is rubbed.
    • 一种液晶(LC)光阀,其包括扭曲向列LC层,其分子与镜面背板上的像素边缘对准,从而提供改善的对比度和效率,并降低后隔片在黑色状态下的可视性。 本发明涉及一种LC结构,其中背板沿着具有像素边缘的直线方向摩擦。 给出LC层与常规TN光阀相同的扭转旋转和双折射。 通过用偏振相对于x,y,像素轴旋转扭转角的光并通过收集反射光的正交偏振分量来照射光阀来维持极化控制。 因此,光阀顶玻璃沿着背板被摩擦的水平或垂直方向旋转扭转角的方向摩擦。
    • 8. 发明授权
    • Band-shifted liquid crystal structure for projection of images without spectral distortion
    • 用于投影图像的带偏移液晶结构,无光谱失真
    • US06650383B1
    • 2003-11-18
    • US09578272
    • 2000-05-25
    • Minhua LuAlan Edward RosenbluthKei-Hsiung Yang
    • Minhua LuAlan Edward RosenbluthKei-Hsiung Yang
    • G02F11347
    • G02F1/13471G02F1/1396G02F2203/02
    • A reflective liquid crystal lightvalve for modulating the polarization of incident light within a specified band of wavelengths into on and off states, comprises: (i) a pixelated reflective backplane; (ii) a first liquid crystal layer, positioned proximate the pixelated reflective backplane, the first liquid crystal layer being tuned in the off state to switch incident light at the center of the specified band of wavelengths into a state that is not fully off; and (iii) a second liquid crystal layer, positioned proximate the first liquid crystal layer wherein the first liquid crystal layer is positioned between the second liquid crystal layer and the pixelated reflective backplane, the second liquid crystal layer having a birefringence which, at a given depth within its thickness, is substantially equal and opposite to a birefringence of a layer within the first liquid crystal layer that is located at a matching distance from a midplane separating the first and second liquid crystal layers.
    • 用于将特定波长波长内的入射光的偏振调制为导通和截止状态的反射型液晶光阀包括:(i)像素反射背板; (ii)位于像素化反射背板附近的第一液晶层,第一液晶层被调谐到关闭状态,以将特定波段波长的中心的入射光切换到未完全关闭的状态; 和(iii)位于第一液晶层附近的第二液晶层,其中第一液晶层位于第二液晶层和像素反射背板之间,第二液晶层具有双折射,在给定的 其厚度之间的深度基本上等于和相对于第一液晶层内的与分离第一和第二液晶层的中平面相匹配的距离处的层的双折射。