公开(公告)号：US20040080722A1

公开(公告)日：2004-04-29

申请号：US10651242

申请日：2003-08-29

申请人： HITACHI, LTD.

发明人： Futoshi Yamasaki ,  Satoshi Nakayama ,  Takuya Shiaki ,  Tsutomu Nakashima ,  Eiji Yamaguchi ,  Nobuyuki Kimura

IPC分类号： G03B021/14

CPC分类号： G03B21/208 ,  G03B21/16

摘要： A projection display according to the present invention reduces the size of a light beam in the optical path of an illumination optics from the periphery to change the amount of light incident on a video display device and the angle of such incidence, thereby making a plurality of image brightness/contrast combinations selectable. Further, the present invention changes the revolving speed of a projection display cooling fan and the adjustment value settings for the video display device's electrical characteristics in accordance with the aperture.

摘要翻译： 根据本发明的投影显示器从周边减小照明光学器件的光路中的光束的尺寸，以改变入射在视频显示装置上的光量和这种入射角度，从而使多个 图像亮度/对比度组合可选。 此外，本发明根据孔径改变投影显示冷却风扇的转速和视频显示装置的电特性的调整值设置。

公开(公告)号：US20040239882A1

公开(公告)日：2004-12-02

申请号：US10887028

申请日：2004-07-07

申请人： Hitachi, Ltd.

发明人： Koji Hirata ,  Masahiko Yatsu ,  Futoshi Yamasaki

IPC分类号： G03B021/14

CPC分类号： G02B27/1026 ,  G02B27/1073 ,  G02B27/149 ,  H04N9/3105

摘要： In an illumination optical system and a color combining optical system of a projection apparatus using three image display elements, the object of the present invention is to reduce luminance variations, reduce color variations, provide high contrast, lower costs, and reduce misconvergence of enlarged images displayed on a screen.

摘要翻译： 在使用三个图像显示元件的投影装置的照明光学系统和彩色组合光学系统中，本发明的目的是减少亮度变化，减少颜色变化，提供高对比度，降低成本并减少放大图像的失会聚 显示在屏幕上。

公开(公告)号：US20010008439A1

公开(公告)日：2001-07-19

申请号：US09791702

申请日：2001-02-26

申请人： Hitachi, Ltd.

发明人： Nobuhiko Konuma ,  Hidetomo Yoshimura ,  Seiichi Sekiguchi ,  Mikiharu Kuwata ,  Masaharu Deguchi ,  Takashi Kakuda ,  Yutaka Matsuda ,  Takuya Shiaki ,  Futoshi Yamasaki ,  Atsushi Ishibashi ,  Koichi Umezawa ,  Takeshi Hoshino ,  Shigehisa Hagura ,  Makoto Fukatsu ,  Nobuyuki Kaku ,  Kenji Fuse ,  Satoshi Ohuchi ,  Tomohiro Miyoshi ,  Naohiro Ozawa ,  Masahiko Yatsu ,  Yasuo Otsuka ,  Takesuke Maruyama

IPC分类号： G03B021/16

CPC分类号： G03B21/16

摘要： A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.

摘要翻译： 一种液晶投影仪，包括：照明光学系统，包括光源;分离光学系统，用于将照明光学系统发射的照射光分离为三种光线;投影透镜单元，包括投影透镜，十字分色棱镜 设置在投影透镜的光接收端附近，以及配置在十字分色棱镜周围的多个液晶面板，以及用于向光源供电的光源电源。 投影透镜单元，分色光学系统，照明光学系统和光源电源按顺序排列。 液晶投影仪的外形尺寸为263mm×318mm以下的水平面。 液晶面板的显示屏尺寸为0.9英寸。用于冷却多个液晶面板的冷却风扇设置在投影透镜旁边。

公开(公告)号：US20030218724A1

公开(公告)日：2003-11-27

申请号：US10356000

申请日：2003-01-31

申请人： Hitachi, Ltd.

发明人： Masahiko Yatsu ,  Koji Hirata ,  Futoshi Yamasaki

IPC分类号： G03B021/00

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.

摘要翻译： 通过使反射型液晶面板的入射光束具有二向色功能的交叉棱镜中的光束偏振状态与反射的ON光束相同，提供了小型，低成本的投影型投影仪装置。 具有法拉第旋转角度为45度的法拉第旋转器设置在PBS和交叉棱镜之间的光路上。 将具有将线性偏振光的偏振角旋转45或135度的偏振轴的半波片布置在紧邻法拉第旋转器之前或之后的光学上。

公开(公告)号：US20030206276A1

公开(公告)日：2003-11-06

申请号：US10422952

申请日：2003-04-25

申请人： Hitachi, Ltd. ,  Hitachi Video and Information System, Inc.

发明人： Nobuhiko Konuma ,  Hidetomo Yoshimura ,  Seiichi Sekiguchi ,  MIkiharu Kuwata ,  Masaharu Deguchi ,  Takashi Kakuda ,  Yutaka Matsuda ,  Takuya Shiaki ,  Futoshi Yamasaki ,  Atsushi Ishibashi ,  Koichi Umezawa ,  Takeshi Hoshino ,  Shigehisa Hagura ,  Makoto Fukatsu ,  Nobuyuki Kaku ,  Kenji Fuse ,  Satoshi Ohuchi ,  Tomohiro Miyoshi ,  Naohiro Ozawa ,  Masahiko Yatsu ,  Yasuo Otsuka ,  Takesuke Maruyama

IPC分类号： G03B021/00

CPC分类号： G03B21/16

摘要： A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.

摘要翻译： 一种液晶投影仪，包括：照明光学系统，包括光源;分离光学系统，用于将照明光学系统发射的照射光分离为三种光线;投影透镜单元，包括投影透镜，十字分色棱镜 设置在投影透镜的光接收端附近，以及配置在十字分色棱镜周围的多个液晶面板，以及用于向光源供电的光源电源。 投影透镜单元，分色光学系统，照明光学系统和光源电源按顺序排列。 液晶投影仪的外形尺寸为263mm×318mm以下的水平面。 液晶面板的显示屏尺寸为0.9英寸。用于冷却多个液晶面板的冷却风扇设置在投影透镜旁边。

公开(公告)号：US20030169376A1

公开(公告)日：2003-09-11

申请号：US10292537

申请日：2002-11-13

申请人： Hitachi, Ltd.

发明人： Satoshi Ouchi ,  Masahiko Yatsu ,  Koji Hirata ,  Futoshi Yamasaki ,  Tomohiro Miyoshi

IPC分类号： H04N005/64

CPC分类号： H04N9/3117 ,  G02B26/123 ,  G02B26/129 ,  H04N5/7441 ,  H04N5/7458

摘要： An image display technique which projects R, G, and B light rays on a display device to form an image with an increased utilization ratio of light and an increased screen brightness. R, G, and B light rays as a result of color separation are reflected by plural reflective surfaces on the inner side, etc. of a rotary polyhedral reflector, so that, as the reflector rotates around a central axis and its reflection plane sequentially changes from one reflective surface to a next one, the reflected light rays are projected on a display device surface in different positions and scroll in a prescribed direction.

摘要翻译： 在显示装置上投影R，G，B光线以形成具有增加的光的利用率和增加的屏幕亮度的图像的图像显示技术。 作为分色结果的R，G和B光线由旋转多面体反射体的内侧等上的多个反射面反射，使得当反射体围绕中心轴旋转时，其反射面依次变化 从一个反射表面到另一个反射表面，反射的光线在不同的位置上投影在显示装置表面上并沿规定的方向滚动。