公开(公告)号：US20090103060A1

公开(公告)日：2009-04-23

申请号：US12030899

申请日：2008-02-14

申请人： Koji HIRATA ,  Masahiko Yatsu ,  Takanori Hisada ,  Hidehiro Ikeda

发明人： Koji HIRATA ,  Masahiko Yatsu ,  Takanori Hisada ,  Hidehiro Ikeda

IPC分类号： G03B21/20 ,  G03B21/14 ,  G03B21/28

CPC分类号： G03B21/62 ,  G02F1/133526 ,  G02F1/133604 ,  G02F1/133605 ,  G02F1/133611 ,  G02F1/13362 ,  G02F1/13471 ,  G02F2001/133607 ,  G02F2001/133622 ,  G03B21/208 ,  G03B21/26 ,  G03B21/28 ,  H04N9/3155

摘要： A display apparatus comprises a lighting unit for emitting a light, and a first light modulation unit for forming an image through modulation of the light from a light source unit, wherein the lighting unit includes a light source for emitting the light, a second light modulation unit for modulating the light from the light source, being smaller than the first light modulation unit for modulating the light from the light source, and a projection unit for projecting the light modulated through the second light modulation unit, enlargely, upon the first light modulation unit for use of display.

摘要翻译： 显示装置包括用于发光的照明单元和用于通过调制来自光源单元的光来形成图像的第一光调制单元，其中照明单元包括用于发光的光源，第二光调制 用于调制来自光源的光的单元，小于用于调制来自光源的光的第一光调制单元，以及投影单元，用于在第一光调制时放大经第二光调制单元调制的光， 显示器使用单位。

公开(公告)号：US20070206165A1

公开(公告)日：2007-09-06

申请号：US11679283

申请日：2007-02-27

申请人： Masahiko Yatsu ,  Koji Hirata

发明人： Masahiko Yatsu ,  Koji Hirata

IPC分类号： G03B21/28

CPC分类号： H04N5/74 ,  G02B27/0977 ,  G02B27/102 ,  G02B27/143 ,  G02B27/145 ,  G02B27/149 ,  H04N9/3152

摘要： Uniform light quantity distribution is achieved in an image display element by directing light beam reflected in an A quadrant of X-Y plane coordinate system of a reflector into a B quadrant of the X-Y plane coordinate system of the image displaying element, when the X-Y plane coordinate system is provided in a plane perpendicular to an optical axis of a light emitting part.

摘要翻译： 在XY平面坐标系中，通过将反射器的XY平面坐标系的A象限反射的光束引导到图像显示元件的XY平面坐标系的B象限中，在图像显示元件中实现均匀的光量分布 设置在垂直于发光部分的光轴的平面中。

公开(公告)号：US07261420B2

公开(公告)日：2007-08-28

申请号：US11637692

申请日：2006-12-13

申请人： Masahiko Yatsu ,  Koji Hirata ,  Hidehiro Ikeda

发明人： Masahiko Yatsu ,  Koji Hirata ,  Hidehiro Ikeda

IPC分类号： G03B21/14 ,  G03B21/26 ,  G02B13/22 ,  G02B23/24 ,  G02B9/06

CPC分类号： G02B13/22 ,  G03B21/142

摘要： A projection optical unit for enlarged projection of an image displayed by an image display element includes a first projection optical unit having positive refractive power, and a second projection optical unit having positive refractive power for further enlarging the first enlarged image obtained by the first projection optical unit. The first projection optical unit is in an almost telecentric relationship with respect to the image display element side and the first enlarged image side, and the first enlarged image is formed at the image display element side, rather than at the second projection optical unit.

摘要翻译： 用于由图像显示元件显示的图像进行放大投影的投影光学单元包括具有正折光力的第一投影光学单元和具有正折光力的第二投影光学单元，用于进一步放大由第一投影光学获得的第一放大图像 单元。 第一投影光学单元相对于图像显示元件侧和第一放大图像几乎是远心关系，并且第一放大图像形成在图像显示元件侧而不是在第二投影光学单元处。

公开(公告)号：US20070019163A1

公开(公告)日：2007-01-25

申请号：US11471030

申请日：2006-06-19

申请人： Hidehiro Ikeda ,  Masahiko Yatsu ,  Koji Hirata ,  Kei Adachi

发明人： Hidehiro Ikeda ,  Masahiko Yatsu ,  Koji Hirata ,  Kei Adachi

IPC分类号： G03B21/14

CPC分类号： G03B21/2073 ,  G03B21/208 ,  G03B33/12 ,  H04N9/3117

摘要： A projection type video display apparatus having improved color separating ability is provided. The projection type video display apparatus includes a color separating unit including an entrance plate provided with an aperture through which light beams emitted by a light source travel, an optical integrator, and a plurality of dichroic mirrors disposed with their color separating surfaces extended substantially parallel to the exit surface of the optical integrator and capable of transmitting color light beams of wavelengths in a predetermined wavelength range and of reflecting color light beams of wavelengths outside the predetermined wavelength range.

摘要翻译： 提供了具有改进的分色能力的投影型视频显示装置。 投影型视频显示装置包括一个分色单元，它包括一个入口板，该入口板设置有一个入口板，入口板设置有一个由光源发出的光束行进的孔径，一个光学积分器和多个分色镜，它们的颜色分离表面基本平行于 光学积分器的出射表面，并能够透射预定波长范围内的波长的彩色光束并反射预定波长范围外的波长的彩色光束。

公开(公告)号：US20060274274A1

公开(公告)日：2006-12-07

申请号：US11445465

申请日：2006-06-02

申请人： Kei Adachi ,  Koji Hirata ,  Masahiko Yatsu

发明人： Kei Adachi ,  Koji Hirata ,  Masahiko Yatsu

IPC分类号： G03B21/14

CPC分类号： G02B27/149 ,  G02B27/1026 ,  G03B21/2073 ,  G03B21/208

摘要： The present invention provides a technique which can enhance contrast and brightness of a displayed image in a projection image display apparatus. According to the present invention, as a polarization splitting unit polarization-splitting incident light or exiting light upon/from a light valve, F number of a polarization splitting plane formed between prism members in an axial direction in which an incident angle of light is small (Y-axis direction) is smaller than F number in an axial direction in which an incident angle is large (X′-axis direction or Z′-axis direction) so that the light is incident so as to be tilted in the axial direction in which the incident angle is small. This can suppress an amount of change in incident angle of light upon a polarization splitting plane to a small value and can increase an amount of incident light upon the polarization splitting plane in the state that polarization-splitting performance is maintained in the best range.

摘要翻译： 本发明提供一种能够增强投影图像显示装置中的显示图像的对比度和亮度的技术。 根据本发明，作为偏振分离单元，偏振光分离入射光或从光阀出射光，在光入射角小的轴向的棱镜构件之间形成的偏振分束平面的F数 （Y轴方向）小于入射角（X'轴方向或Z'轴方向）的轴方向的F数，使得光入射到轴向方向 其中入射角小。 由此，能够将偏振光分离面的光的入射角的变化量抑制到小的值，并且能够在极化分离性能保持最佳范围的状态下增加偏振分离面上的入射光量。

公开(公告)号：US07014319B2

公开(公告)日：2006-03-21

申请号：US10808391

申请日：2004-03-25

申请人： Koji Hirata ,  Masahiko Yatsu

发明人： Koji Hirata ,  Masahiko Yatsu

IPC分类号： G03B21/14

CPC分类号： H04N9/3182

摘要： A projection type color display device capable of achieving both the color balance and higher luminous flux amount (high luminance) of enlarged on-screen images is disclosed. The device includes a white light source, light flux separating unit, image display elements, photosynthetic unit, and a projection lens device. The light intensities of light fluxes of three primary colors of red, green and blue as split by the light flux separating unit are modulated by the image display elements which are provided in a way corresponding to respective ones and then synthesized together by the photosynthetic unit for enlarged projection onto a screen by the projection lens device. During red image displaying, a red image signal is input to the red image display element while performing modulation by the blue image display element based on a signal obtained by adding to a blue image signal a signal with its amplitude being 1/n times the amplitude of the red image signal.

摘要翻译： 公开了能够实现增大的屏幕图像的色平衡和较高光通量（高亮度）的投影型彩色显示装置。 该装置包括白光源，光束分离单元，图像显示元件，光合单元和投影透镜装置。 由光束分离单元分割的红色，绿色和蓝色三原色的光通量的光强度由以相应方式设置的图像显示元件调制，然后由光合单元合成在一起，由 通过投影透镜装置将投影放大到屏幕上。 在红色图像显示期间，红色图像信号被输入到红色图像显示元件，同时基于通过将蓝色图像信号相加得到的信号进行蓝色图像显示元件的调制，该信号的幅度是幅度的1 / n倍 的红色图像信号。

公开(公告)号：US20050213043A1

公开(公告)日：2005-09-29

申请号：US11061055

申请日：2005-02-18

申请人： Tsutomu Nakashima ,  Masahiko Yatsu ,  Koji Hirata

发明人： Tsutomu Nakashima ,  Masahiko Yatsu ,  Koji Hirata

IPC分类号： G02B27/18 ,  G02B27/28 ,  G03B21/14

CPC分类号： G03B21/14 ,  G03B21/16 ,  G03B21/2073

摘要： A technique according to the present invention allows a projection-type image display system to suppress the temperature rise of the polarization split devices and secure high image quality. Polarization split means has a polarization split device arranged in a medium with a refractive index larger than 1. The polarization split device has a polarization split surface on which a diffractive grating structure is formed to polarize and split light. An air layer is formed in contact with the polarization split surface. In a projection type image display apparatus or an optical unit using this apparatus, light fluxes are polarized and split by the polarization split means before irradiated to light valves and after modulated by the light valves and color composition is made from the polarized and split light fluxes before enlarged and projected by a projection lens unit.

摘要翻译： 根据本发明的技术允许投影型图像显示系统抑制偏振分离装置的温度升高并确保高图像质量。 极化分离装置具有布置在折射率大于1的介质中的偏振分离装置。偏振分离装置具有偏振分裂表面，其上形成有衍射光栅结构以使光分离和分离。 形成与偏振分离面接触的空气层。 在使用该装置的投影型图像显示装置或光学装置中，光束在被照射到光阀之前被偏振分束装置偏振并分离，并且在被光阀调制之后，并且由偏振和分离光束形成色彩组合 之后由投影透镜单元放大和投影。

公开(公告)号：US20050073652A1

公开(公告)日：2005-04-07

申请号：US10993945

申请日：2004-11-18

申请人： Masahiko Yatsu ,  Koji Hirata ,  Futoshi Yamasaki

发明人： Masahiko Yatsu ,  Koji Hirata ,  Futoshi Yamasaki

IPC分类号： G02F1/13 ,  G02B27/28 ,  G02F1/1335 ,  G03B21/00 ,  H04N9/31

CPC分类号： H04N9/3105 ,  G02B27/283

摘要： By making the beam polarization state in a cross prism having a dichroic function for an incident beam on a reflection type liquid crystal panel the same as that for a reflected ON beam, a small-sized, low cost projection type projector apparatus is provided. A Faraday rotator having a Faraday rotation angle of 45 degrees is disposed on an optical path between a PBS and a cross prism. A half-wave plate having such a polarization axis as to rotate a polarization angle of linearly polarized light by 45 or 135 degrees is disposed on an optical immediately before or behind the Faraday rotator.

公开(公告)号：US20050012870A1

公开(公告)日：2005-01-20

申请号：US10842936

申请日：2004-05-10

申请人： Koji Hirata ,  Masahiko Yatsu

发明人： Koji Hirata ,  Masahiko Yatsu

IPC分类号： G02B27/18 ,  G02F1/133 ,  G03B21/00 ,  G03B21/10 ,  H04N5/66 ,  H04N5/74 ,  H04N9/31

CPC分类号： H04N9/3105

摘要： The system provides a projection-type video display device with high image quality and high reliability. The system improves color purity by cutting the yellow component from red and green, enhances the optical energy balance of the three colors by providing a reflection-type attenuation filter for reflecting light in the green optical path. The system also improves contrast characteristics by providing an optical phase difference compensator in the green optical path and increases durability of a video display element by arranging two optical parts having ultraviolet reflection coating in the blue optical path. Also an ultraviolet absorption filter for the incidence side of a blue liquid crystal panel is described.

摘要翻译： 该系统提供了具有高图像质量和高可靠性的投影型视频显示设备。 该系统通过从红色和绿色切割黄色成分来提高颜色纯度，通过提供用于反射绿色光路中的光的反射型衰减滤光片来增强三种颜色的光能平衡。 该系统还通过在绿色光路中提供光学相位差补偿器并且通过在蓝色光路中布置具有紫外线反射涂层的两个光学部件来增加视频显示元件的耐久性，来改善对比度特性。 还描述了用于蓝色液晶面板的入射侧的紫外线吸收滤光器。

公开(公告)号：US09022581B2

公开(公告)日：2015-05-05

申请号：US13676587

申请日：2012-11-14

申请人： Koji Hirata ,  Masahiko Yatsu ,  Takanori Hisada ,  Masayuki Ohki

发明人： Koji Hirata ,  Masahiko Yatsu ,  Takanori Hisada ,  Masayuki Ohki

IPC分类号： G03B21/28 ,  G03B21/56 ,  G02B17/08 ,  G03B21/10 ,  G03B21/14

CPC分类号： G03B21/56 ,  G02B17/08 ,  G02B17/0852 ,  G03B21/10 ,  G03B21/14 ,  G03B21/28

摘要： A projection display system includes a projection display unit and a member in a form of one of a windable screen, a white board and a notice board. The projection display unit projects an image light onto a projection plane of the member to display an image thereon. The projection display unit includes a light source, an image display element, a lighting optical system irradiating a beam of light from the light source on the image display element, and a projection optical system projecting the image light from the image display element toward the member. The projection optical system includes, in order toward the member from the image display element, a front lens group, and a reflecting mirror shaped to be axial-asymmetrical with respect to the optical axis.

摘要翻译： 投影显示系统包括投影显示单元和可卷绕屏幕，白板和通知板之一的形式的构件。 投影显示单元将图像光投射到构件的投影平面上以在其上显示图像。 投影显示单元包括光源，图像显示元件，照射来自光源的光束的照明光学系统在图像显示元件上，以及投影光学系统，其将来自图像显示元件的图像光朝向该元件投影 。 投影光学系统为了朝向来自图像显示元件的构件，包括前透镜组和反射镜，其被成形为相对于光轴轴向不对称。