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    • 2. 发明授权
    • Staggered waveplate LCD privacy screen
    • 交错波片LCD隐私屏幕
    • US06239853B1
    • 2001-05-29
    • US09410824
    • 1999-10-01
    • Bruce K. WinkerDonald B. Taber
    • Bruce K. WinkerDonald B. Taber
    • G02F11337
    • G02F1/1323G02F1/13363G02F2001/133638G02F2413/02G02F2413/09
    • An assembly for restricting the angle of vision of an image emitted from an LCD screen comprising a linearly parallel arrangement of two polarizing films with at least two waveplates there between. The transmission planes of the polarizing films are at an angle, preferrably 90° to each other. At least two parallel waveplates are positioned between, the polarizing films. Each waveplate has parallel transmitting regions alternating between birefringent and isotropic regions. The waveplates are positioned in a spaced apart relationship to each other such that substantially orthogonal light passing through the first polarizing screen and one of the birefringent or isotropic alternating transmitting regions of the first waveplate will pass through the other of the alternating striped transmitting regions of the second waveplate. Light so transmitted will then pass through the second polarizing film and be viewable. At least a portion of the horizontal components of non-orthogonal light incident on the waveplate assembly will not pass through the second polarizing film This assembly results in a angle of vision narrower than from the LCD screen.
    • 一种用于限制从LCD屏幕发射的图像的视角的组件,包括两个偏振膜的线性平行布置,其间具有至少两个波片。 偏振膜的透射平面成一角度,最好彼此成90°。 至少两个平行的波片位于偏振膜之间。 每个波片具有在双折射和各向同性区域之间交替的平行透射区域。 波片彼此间隔开地定位,使得通过第一偏振屏幕的基本上正交的光和第一波片的双折射或各向同性交替透射区域中的一个将穿过第一波片的交替条纹透射区域中的另一个, 第二波片。 然后透过的光将通过第二偏光膜并且是可见的。 入射在波片组件上的非正交光的水平分量的至少一部分将不会通过第二偏光膜。该组件导致视角比液晶显示屏窄。
    • 5. 发明授权
    • Negative optical compensator tilted in respect to liquid crystal cell
for liquid crystal display
    • 相对于用于液晶显示器的液晶单元倾斜的负光学补偿器
    • US5986733A
    • 1999-11-16
    • US56265
    • 1993-04-30
    • Bruce K. WinkerWilliam J. Gunning, IIIDonald B. Taber
    • Bruce K. WinkerWilliam J. Gunning, IIIDonald B. Taber
    • G02F1/1335G02F1/13363G02F1/139
    • G02F1/133632G02F1/1396G02F1/1397G02F2413/14
    • A normally white liquid crystal display includes polarizer and analyzer layers having perpendicular absorbing axes. A liquid crystal layer is disposed between the polarizer layer and the analyzer layer, with its director exhibiting an azimuthal twist through the layer. First and second electrodes are proximate to first and second major surfaces of the liquid crystal layer. A first negatively birefringent compensator layer, oriented with its optical axis substantially parallel to the average direction of the optical axis within a central, nominally homeotropic region of the liquid crystal layer in its driven state, is disposed between the polarizer layer and the liquid crystal layer. A second negatively birefringent compensator layer, with a birefringence substantially the same as the birefringence of the first compensator layer and oriented with its optical axis substantially parallel to the optical axis of the first compensator layer, is disposed between the analyzer layer and the liquid crystal layer.
    • 正常白色液晶显示器包括具有垂直吸收轴的偏振器和分析器层。 液晶层设置在偏振器层和分析器层之间,其导向器表现出通过该层的方位角扭转。 第一和第二电极靠近液晶层的第一和第二主表面。 第一负双折射补偿层,其光轴基本上平行于处于其驱动状态的液晶层的中心名义上的垂直方向的光轴的平均方向定向在偏振器层和液晶层之间 。 第二负双折射补偿层具有基本上与第一补偿层的双折射基本相同并且其光轴基本上平行于第一补偿层的光轴的双折射补偿层设置在分析器层和液晶层之间 。
    • 9. 发明授权
    • Liquid crystal adaptive coupler for steering a light beam relative to a light-receiving end of an optical waveguide
    • 用于相对于光波导的光接收端转向光束的液晶自适应耦合器
    • US06832028B2
    • 2004-12-14
    • US10267282
    • 2002-10-08
    • Dong-Feng GuDonald B. TaberBruce K. Winker
    • Dong-Feng GuDonald B. TaberBruce K. Winker
    • G02B626
    • G02F1/292G02B6/32G02B6/351G02B6/3556G02F1/1392
    • An apparatus for optically coupling a light source with a light-receiving end face of an optical waveguide comprises a lens for focusing a light beam emitted from the light source at a focal point on the light-receiving end face of the optical waveguide. An adaptive coupler, positioned in the optical path, is responsive to a beam steering control signal for steering and aligning the focal point relative to the light-receiving end face of the optical waveguide. In one form, the adaptive coupler comprises a pair of transparent substrates having confronting, parallel inner faces, the inner face of one of the pair of substrates carrying a beam intercepting, optically transparent, constant potential electrode and the inner face of the other of the pair of substrates carrying an electrically resistive, beam intercepting, optically transparent film. A pair of spaced apart electrodes in electrical contact with the film apply a linear voltage gradient along the film. An electro-optical phase shifting medium is disposed between the confronting inner faces of the substrates. The application of selected voltages to the electrodes creates a linear voltage gradient along the aforementioned film on the inner face of the one substrate resulting in a linearly varying electric field between that film and the constant potential electrode creating a corresponding linear variation in the refractive index of the liquid crystal medium and a linear wavefront tilt in the intercepting optical beam.
    • 用于将光源与光波导的光接收端面光学耦合的装置包括用于将从光源发射的光束聚焦在光波导的光接收端面上的焦点处的透镜。 位于光路中的自适应耦合器响应于光束转向控制信号,用于相对于光波导的光接收端面转向和对准焦点。 在一种形式中,自适应耦合器包括一对具有相对的平行内表面的透明基板,一对基板中的一个基板的内表面承载光束拦截,光学透明的恒定电位电极,另一个的内表面 一对基板承载电阻,光束截取的光学透明膜。 与膜电接触的一对间隔开的电极沿膜施加线性电压梯度。 电光相移介质设置在基板的相对的内表面之间。 将选择的电压施加到电极在一个衬底的内表面上沿着上述膜产生线性电压梯度,导致该膜和恒电位电极之间线性变化的电场产生相应的线性变化 液晶介质和截取光束中的线性波前倾斜。