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    PROJECTION-TYPE DISPLAY DEVICE
    2.
    发明公开
    PROJECTION-TYPE DISPLAY DEVICE 有权
    投影式显示装置

    公开(公告)号：EP2634628A1

    公开(公告)日：2013-09-04

    申请号：EP11836034.6

    申请日：2011-10-13

    申请人： JVC Kenwood Corporation

    发明人： KOBAYASHI Tomohisa ,  AIZAKI Takatsugu ,  KIKUMA Shinji

    IPC分类号： G03B21/14 ,  G02F1/13 ,  G02F1/1335 ,  G03B21/00 ,  H04N5/74

    CPC分类号： H04N9/3155 ,  G02B5/005 ,  G02B27/0927 ,  G02B27/0961 ,  G02B27/1026 ,  G03B9/02 ,  G03B21/006 ,  G03B21/2053 ,  G03B21/208 ,  H04N9/3167

    摘要： It is to provide a projection type display apparatus which enhances the contrast performance while minimizing a reduction in the brightness by blocking a light beam which would decrease the contrast through the use of diaphragms provided in both of an illumination optical system and a projection lens.
    [Solution] A light source portion 1 and 2, a first lens array 4, a second lens array 5, and a superposition lens 7 constitute an illumination optical system. An illumination diaphragm 8 located in the vicinity 7 of the second lens array becomes a diaphragm aperture in a rectangular shape when being narrowed, wherein a side of the diaphragm aperture in the rectangular shape and longer side directions of the lens cells of the second lens array 5 are perpendicular or parallel to each other. A liquid crystal display device 17 modulates incident light. A projection lens 19 enlarges and projects modulation light. A projection lens diaphragm 20 becomes a diaphragm aperture in a rhombus shape when being narrowed, wherein a diagonal line of the diaphragm aperture in the rhombus shape and directions of sides of lens cells in a pupil image of the second lens array 5 which is formed in a pupil position of the projection lens are perpendicular or parallel to each other.

    摘要翻译： 提供一种投影型显示装置，其通过使用设置在照明光学系统和投影透镜两者中的光阑来阻挡会降低对比度的光束，从而提高对比度性能同时最小化亮度降低。 解决方案光源部分1和2，第一透镜阵列4，第二透镜阵列5和叠加透镜7构成照明光学系统。 位于第二透镜阵列附近7的照明光阑8在变窄时成为矩形形状的光阑孔径，其中第四透镜阵列的矩形光阑开口的边长和透镜单元的长边方向 5彼此垂直或平行。 液晶显示装置17调制入射光。 投影透镜19放大并投射调制光。 当缩小投影透镜光阑20时，成为菱形形状的光阑开口，其中形成在第二透镜阵列5的瞳孔图像中的菱形形状的光阑开口的对角线和透镜单元的边的方向 投影透镜的瞳孔位置彼此垂直或平行。