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    Liquid crystal display apparatus and liquid crystal projection display apparatus which employ hologram color filter
    1.
    发明授权
    Liquid crystal display apparatus and liquid crystal projection display apparatus which employ hologram color filter 失效

    公开(公告)号：US5737040A

    公开(公告)日：1998-04-07

    申请号：US500757

    申请日：1995-07-11

    申请人： Nobuhiko Ichikawa ,  Tsuyoshi Hotta

    发明人： Nobuhiko Ichikawa ,  Tsuyoshi Hotta

    IPC分类号： G02F1/13357 ,  G02F1/1335 ,  G02B5/32

    CPC分类号： G02F1/133621

    摘要： A liquid crystal display apparatus and liquid crystal projection display apparatus, which employ a hologram color filter, and which are designed so that the illuminating light utilization efficiency is improved to a considerable extent, and that a color image can be faithfully displayed with excellent color reproducibility without uneven color or other similar problem. A color liquid crystal display apparatus (11) has a hologram (5), which diffractively disperses incident light so as to emanate light rays in different wavelength regions at a predetermined spatial period, as a color filter, and a liquid crystal display device (6). The display apparatus (11) is illuminated by white parallel back light (3) from an illuminator (14). A displayed image which is modulated in the color liquid crystal display apparatus (11) is passed through a field lens, which is disposed in the vicinity of the display apparatus (11), and formed as an enlarged image on a screen (19) for display through a projection lens (18). A short-wavelength cut-off filter whose transmittance for a wavelength not longer than 430 nm is not higher than 5% is disposed at a position in an optical path extending from a lamp (15) to the screen (19), thereby preventing crosstalk of colors which might otherwise occur when light which should be incident on a pixel assigned to display blue undesirably enters a pixel which is adjacent to the pixel for blue, and thus making it possible to display a faithful color image.

    Liquid crystal display apparatus and liquid crystal projection display apparatus which employ hologram color filter
    2.
    发明授权
    Liquid crystal display apparatus and liquid crystal projection display apparatus which employ hologram color filter 失效
    液晶显示装置和采用全息彩色滤光片的液晶投影显示装置

    公开(公告)号：US06473144B1

    公开(公告)日：2002-10-29

    申请号：US08965047

    申请日：1997-11-05

    申请人： Nobuhiko Ichikawa ,  Tsuyoshi Hotta

    发明人： Nobuhiko Ichikawa ,  Tsuyoshi Hotta

    IPC分类号： F02F11335

    CPC分类号： G02F1/133621

    摘要： A liquid crystal display apparatus and liquid crystal projection display apparatus, which employ a hologram color filter, and which are designed so that the illuminating light utilization efficiency is improved to a considerable extent, and that a color image can be faithfully displayed with excellent color reproducibility without uneven color or other similar problem. A color liquid crystal display apparatus (11) has a hologram (5), which diffractively disperses incident light so as to emanate light rays in different wavelength regions at a predetermined spatial period, as a color filter, and a liquid crystal display device (6). The display apparatus (11) is illuminated by white parallel back light (3) from an illuminator (14). A displayed image which is modulated in the color liquid crystal display apparatus (11) is passed through a field lens, which is disposed in the vicinity of the display apparatus (11), and formed as an enlarged image on a screen (19) for display through a projection lens (18). A short-wavelength cut-off filter whose transmittance for a wavelength not longer than 430 nm is not higher than 5% is disposed at a position in an optical path extending from a lamp (15) to the screen (19), thereby preventing crosstalk of colors which might otherwise occur when light which should be incident on a pixel assigned to display blue undesirably enters a pixel which is adjacent to the pixel for blue, and thus making it possible to display a faithful color image.

    摘要翻译： 一种液晶显示装置和液晶投影显示装置，其采用全息图彩色滤光片，其设计使得照明光利用效率得到相当大的改善，并且可以忠实地显示彩色图像，具有优异的颜色再现性 没有不均匀的颜色或其他类似的问题。 彩色液晶显示装置（11）具有全息图（5），其以预定的空间周期将不同波长区域的光线衍射的入射光衍射为散射光，作为滤色器，以及液晶显示装置（6） ）。 显示装置（11）由来自照明器（14）的白色平行背光（3）照射。 在彩色液晶显示装置（11）中调制的显示图像通过设置在显示装置（11）附近的场透镜，并在屏幕（19）上形成为放大图像，用于 通过投影透镜（18）显示。 在从灯（15）延伸到屏幕（19）的光路中的位置配置有波长不大于430nm的透射率不高于5％的短波截止滤波器，从而防止串扰 当应该入射到分配给显示蓝色的像素的光不期望地进入与蓝色的像素相邻的像素时，可能会发生的颜色，从而使得可以显示忠实的彩色图像。

    Hologram color filter, and its fabrication method
    3.
    发明授权
    Hologram color filter, and its fabrication method 失效
    全息彩色滤光片及其制作方法

    公开(公告)号：US06426812B2

    公开(公告)日：2002-07-30

    申请号：US09152511

    申请日：1998-09-14

    申请人： Nobuhiko Ichikawa ,  Tsuyoshi Hotta ,  Kenji Ueda

    发明人： Nobuhiko Ichikawa ,  Tsuyoshi Hotta ,  Kenji Ueda

    IPC分类号： G02B532

    CPC分类号： G02B5/203 ,  G02B5/32 ,  G02B7/003 ,  G02B27/32 ,  G02B27/62 ,  G02F1/133621 ,  G02F2001/133623 ,  G03H1/0248 ,  G03H1/202 ,  G03H1/26 ,  G03H2001/207 ,  G03H2001/2271 ,  G03H2001/2615 ,  G03H2223/19

    摘要： The present invention provides a hologram color filter having a drastically decreased dependence of diffraction efficiency on wavelength and well corrected for a color balance among the three colors R, G and B comprising an array of converging element holograms 5′, each of which enables white light incident at a given angle &thgr; with respect to a normal line of a hologram recorded surface thereof to be spectroscopically separated by wavelength dispersion in a direction substantially along the hologram recorded surface, wherein the converging element holograms 5′ have each a plurality of hologram pieces 51 and 52 superposed on each other or multi-recorded therein, which, with respect to the white light 3 incident at the given angle &thgr;, have substantially identical spatial wavelength distributions of wavelength dispersion and different peak wavelengths of diffraction efficiency.

    摘要翻译： 本发明提供一种全息图彩色滤光片，其具有大大降低的衍射效率对波长的依赖性，并且对于包括会聚元件全息图5'的阵列的三种颜色R，G和B之间的色彩平衡良好地校正， 相对于其全息图记录表面的法线在给定角度θ处的入射在基本沿着全息图记录表面的方向上被波长色散光谱分离，其中会聚元件全息图5'具有多个全息片51 相对于以给定角度θ入射的白光3具有基本相同的波长色散的空间波长分布和衍射效率的不同峰值波长的空间波长分布。

    Transmissively viewable reflection hologram
    5.
    发明授权
    Transmissively viewable reflection hologram 有权
    透视可见反射全息图

    公开(公告)号：US06366371B1

    公开(公告)日：2002-04-02

    申请号：US09535157

    申请日：2000-03-24

    申请人： Daijiro Kodama ,  Tsuyoshi Hotta

    发明人： Daijiro Kodama ,  Tsuyoshi Hotta

    IPC分类号： G03H122

    CPC分类号： G03H1/18 ,  G03H1/2249 ,  G03H2001/0415 ,  G03H2001/2234 ,  G03H2210/30

    摘要： A transmission hologram allowing an illuminating light source for holographic reconstruction to be placed behind the hologram, i.e. on the side opposite to the viewing side, and permitting reconstruction of an image that is bright and clear and has low chromatic dispersion, which is the feature of the reflection type volume hologram. A transmissively viewable reflection hologram has a semitransparent reflecting mirror or a semitransparent reflecting layer placed at either side of a reflection type volume hologram member. The semitransparent reflecting mirror or the semitransparent reflecting layer is integral with or separate from the reflection type volume hologram member.

    摘要翻译： 允许将全息重建的照明光源放置在全息图的后面，即在与观察侧相反的一侧的透射全息图，并且允许重建明亮且清晰且具有低色散的图像，这是 反射型体积全息图。 透过可见的反射全息图具有放置在反射型体积全息元件的任一侧的半透射反射镜或半透明反射层。 半透射反射镜或半透射反射层与反射型体积全息元件成一体或分开。