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    • 2. 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 。
    • 4. 发明授权
    • Birefringent compensator for reflective polarizers
    • 用于反射偏振器的双折射补偿器
    • US5731886A
    • 1998-03-24
    • US535799
    • 1995-09-28
    • Donald B. TaberWilliam J. Gunning, III
    • Donald B. TaberWilliam J. Gunning, III
    • G02B5/30G02F1/1335G02F1/13357
    • G02F1/13362G02B5/3016G02F1/133536G02F2001/133543
    • An optical device for transforming light and an associated liquid crystal display is disclosed. The device includes a layer of cholesteric material of the type which transmits light having a first circular helicity and reflects light having a second circular helicity. A quarter-wave plate positioned on a first side of the layer of cholesteric material converts the transmitted light having the first circular helicity into linearly polarized light. A compensator including a positively birefringent C-plate layer is disposed between the layer of cholesteric material and the quarter-wave plate. The compensator reduces undesirable phase effects in the transmitted light introduced by the layer of cholesteric material. The disclosed LCD employs the optical device to increase backlighting efficiency while improving field of view and chromaticity of the display.
    • 公开了一种用于变换光的光学装置和相关联的液晶显示器。 该装置包括透过具有第一圆形螺旋度的光并且反射具有第二圆形螺旋度的光的类型的胆甾型材料层。 位于胆甾型材料层的第一侧上的四分之一波片将具有第一圆形螺旋度的透射光转换成线偏振光。 包括正双折射C板层的补偿器设置在胆甾型材料层和四分之一波片之间。 补偿器减少由胆甾型材料层引入的透射光中的不期望的相位效应。 所公开的LCD采用光学装置来提高背光效率,同时改善显示器的视野和色度。
    • 5. 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。