Rear projection display
    32.
    发明授权
    Rear projection display 有权
    背投显示

    公开(公告)号:US07088507B2

    公开(公告)日:2006-08-08

    申请号:US10693615

    申请日:2003-10-23

    申请人: Mark D. Peterson

    发明人: Mark D. Peterson

    IPC分类号: G03B21/56 G03B21/60

    摘要: The ultra-thin rear projection display device described herein includes a lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. The screen may be a Fresnel lens having a plurality of bumps on the output surface to reduce the visibility of a stray light image. The Fresnel lens may have a diffusion layer on the output side of the Fresnel lens.

    摘要翻译: 本文所述的超薄背投显示装置包括透镜系统和平行于要在其上显示图像的屏幕的一个或多个平面镜。 屏幕可以是在输出表面上具有多个凸块的菲涅耳透镜,以降低杂散光图像的可视性。 菲涅尔透镜可以在菲涅尔透镜的输出侧具有扩散层。

    Achieving color balance in image projection systems by injecting compensating light
    33.
    发明授权
    Achieving color balance in image projection systems by injecting compensating light 失效
    通过注入补偿光实现图像投影系统中的色彩平衡

    公开(公告)号:US06688747B2

    公开(公告)日:2004-02-10

    申请号:US09877955

    申请日:2001-06-08

    IPC分类号: G03B2126

    摘要: An image projection system improves the brightness and/or color balance of a projected image. The system includes an auxiliary light source from which compensating light co-propagates with polychromatic light emitted by a primary light source along a primary light path. The compensating light has an emission energy content that minimizes an emission energy imbalance introduced by the primary light source. In a first preferred embodiment, the auxiliary light source is affixed at a location near the entrance end of a light tunnel such that the compensating light coincides with the primary light path before first reflection occurs. In a second preferred embodiment, the auxiliary light source is coupled to a light reflector adjacent to the primary light source and thereby allows the compensating light to propagate through the image projection system with the same efficiency as that of the light generated by the primary light source.

    摘要翻译: 图像投影系统改善投影图像的亮度和/或色彩平衡。 该系统包括辅助光源,补偿光从主光源沿着主光路与由主光源发射的多色光共同传播。 补偿光具有使由初级光源引入的发射能量不平衡最小化的发射能量含量。 在第一优选实施例中,辅助光源被固定在光通道的入口端附近的位置处,使得补偿光在第一反射发生之前与主光路重合。 在第二优选实施例中,辅助光源耦合到与初级光源相邻的光反射器,从而允许补偿光以与由初级光源产生的光的效率相同的效率传播通过图像投影系统 。

    Image projector with polarization conversion system
    34.
    发明授权
    Image projector with polarization conversion system 失效
    具有偏光转换系统的图像投影仪

    公开(公告)号:US6053615A

    公开(公告)日:2000-04-25

    申请号:US904393

    申请日:1997-08-01

    IPC分类号: G02B27/28 G03B21/14

    CPC分类号: G02B27/283

    摘要: An image projector has an optical path including, from upstream to downstream, a light source, a light pipe, a polarization conversion prism, a positive lens group and a light valve. The light pipe has an outlet and an inlet, and is constructed to receive light from the light source and to produce a unique projection display format as light is transmitted therethrough. The polarization conversion prism recycles light to optimize the amount of light that is properly polarized in the system. The positive lens group includes at least one positive lens positioned downstream of the polarization conversion prism. The positive lens group images the outlet of the light pipe onto the light valve.

    摘要翻译: 图像投影仪具有从光源,光管,偏振转换棱镜,正透镜组和光阀的上游到下游的光路。 光管具有出口和入口,并且被构造成从光源接收光,并且当光透射通过其时产生独特的投影显示格式。 偏振转换棱镜再循环光以优化系统中适当极化的光量。 正透镜组包括位于偏振转换棱镜下游的至少一个正透镜。 正透镜组将光管的出口图像到光阀上。