公开(公告)号：US07159988B2

公开(公告)日：2007-01-09

申请号：US10921938

申请日：2004-08-20

申请人： Masahiko Yatsu ,  Koji Hirata ,  Hidehiro Ikeda

发明人： Masahiko Yatsu ,  Koji Hirata ,  Hidehiro Ikeda

IPC分类号： G03B21/14 ,  G02B23/24 ,  G02B15/14 ,  G02B3/10 ,  G02B9/06

CPC分类号： G02B13/22 ,  G03B21/142

摘要： A projection optical unit has two lens groups. A first projection optical unit disposed closest to an image display element, temporarily forms a first enlarged image (magnification: M1) at the image display element side, rather than at a second projection optical unit. The first enlarged image is subsequently projected in an enlarged form (magnification: M2, wherein M2>M1) onto a screen via the second projection optical unit. A field lens group having positive refractive power is disposed between the first projection optical unit and the second projection optical unit. Consequently, the relationship between F2, which is the F-value of the second projection optical unit, and F1, which is the F-value of the first projection optical unit, becomes F2=F1/M1, whereby it is possible to realize very-wide-angle imaging at a field angle exceeding 90 degrees.

摘要翻译： 投影光学单元具有两个透镜组。 靠近图像显示元件设置的第一投影光学单元在图像显示元件侧暂时形成第一放大图像（倍率：M 1），而不是在第二投影光学单元处。 第一放大图像随后经由第二投影光学单元以放大的形式（倍率：M 2，其中M 2> M 1）投影到屏幕上。 具有正折光力的场透镜组设置在第一投影光学单元和第二投影光学单元之间。 因此，作为第二投影光学单元的F值的F 2与作为第一投影光学单元的F值的F 1之间的关系变为F 2 = F 1 / M 1，由此 可以在超过90度的场角实现非常广角成像。

公开(公告)号：US20060126020A1

公开(公告)日：2006-06-15

申请号：US10525514

申请日：2004-03-26

申请人： Koji Hirata ,  Tsutomu Nakashima ,  Masahiko Yatsu ,  Nobuo Masuoka

发明人： Koji Hirata ,  Tsutomu Nakashima ,  Masahiko Yatsu ,  Nobuo Masuoka

IPC分类号： G03B21/14

CPC分类号： G03B21/005

摘要： An optical unit, comprising: a light source; a color separation means for separating a light emitted from the light source into plural pieces of color lights; reflection-type image display elements, upon each being incident the corresponding color of the lights from the color separation means, and for forming an optical image for each of the color lights, depending upon an image signal, with using polarization characteristics which the reflection-type image display elements have; and a color synthesizing means for synthesizing the optical images of the respective color lights, to be projected through a projection lens, enlargedly, and further comprising: a reflection-type polarization plate functioning as a polarization plate due to diffraction, being provided on an optical path extending from the color separation means to the reflection-type image display elements, to be a polarizer and an analyzer to the reflection-type image display elements; and an optical chassis for holding the reflection-type polarization plate and the reflection-type image display elements thereon, and having a translucent window on an incident light side of the reflection-type polarization plate while an exiting light side of the reflection-type polarization plate is sealed with an incident surface of the color synthesizing means, wherein a hermetically sealed space is defined by the optical chassis, the reflection-type image display elements and the incident surface of the color synthesizing means, and within the hermetically sealed space is disposed a translucent liquid having refraction index from 1.2 to 1.9.

摘要翻译： 一种光学单元，包括：光源; 用于将从光源发射的光分离成多个彩色光的颜色分离装置; 反射型图像显示元件，在每次入射时，来自分色装置的光的相应颜色，并且根据图像信号，对于每个彩色光形成光学图像，使用偏振特性， 类型图像显示元素有; 以及颜色合成装置，用于合成通过投影透镜放大地投影的各个颜色光的光学图像，并且还包括：反射型偏振板，由于衍射而用作偏振板，设置在光学 将从分色装置延伸到反射型图像显示元件的路径成为偏振器和分析器到反射型图像显示元件; 以及用于将反射型偏振板和反射型图像显示元件保持在其上的光学底盘，并且在反射型偏振板的入射光侧具有半透明窗口，而反射型偏振片的出射光侧 用彩色合成装置的入射表面密封板，其中由光学底盘，反射型图像显示元件和颜色合成装置的入射表面以及在密封空间内的气密密封空间被设置 折射指数为1.2〜1.9的半透明液体。

公开(公告)号：US20060092511A1

公开(公告)日：2006-05-04

申请号：US11200354

申请日：2005-08-08

申请人： Tetsu Ohishi ,  Hiroki Yoshikawa ,  Takanori Hisada ,  Koji Hirata ,  Masahiko Yatsu ,  Daisuke Imafuku

发明人： Tetsu Ohishi ,  Hiroki Yoshikawa ,  Takanori Hisada ,  Koji Hirata ,  Masahiko Yatsu ,  Daisuke Imafuku

IPC分类号： G03B21/56

CPC分类号： H04N5/74 ,  G03B21/10 ,  G03B21/625

摘要： For dissolving ununiformity in the brightness of a projection image within a display image apparatus, obtaining an enlarged projection image through an oblique projection of image lights onto a rear-surface projection type screen, wherein an image from an image generating source 1 is projected through a projection optical system, having a projection lens 2, curved surface reflection mirrors 4 and 5, a reflection mirror 6, from a rear surface of the rear-surface projection type screen 3, within a housing 7 being narrow in depth thereof; the rear-surface projection type screen includes a Fresnel lens sheet 8, wherein the prism surfaces of the Fresnel lens making up the Fresnel lens sheet are formed in an aspheric configuration, thereby letting the light beams from the screen to exit at an exit angle of about zero (0) degree, almost all over the entire surface thereof. With this, it is possible to obtain a projection image, being uniform in the brightness thereof as a whole, and thin-sizing of the image display apparatus, as well.

摘要翻译： 为了溶解显示图像装置内的投影图像的亮度的不均匀性，通过图像光的倾斜投影获得放大的投影图像到背面投影型屏幕上，其中来自图像生成源1的图像通过 投影光学系统，具有投影透镜2，曲面反射镜4和5，来自后表面投影型屏幕3的后表面的反射镜6在壳体7内的深度较窄; 后表面投影型屏幕包括菲涅耳透镜片8，其中构成菲涅尔透镜片的菲涅耳透镜的棱镜表面形成为非球面形状，从而使来自屏幕的光束以出射角 大约零（0）度，几乎遍及其整个表面。 由此，可以获得整体上的亮度均匀的投影图像，以及图像显示装置的薄型化。

公开(公告)号：US20060092385A1

公开(公告)日：2006-05-04

申请号：US11200353

申请日：2005-08-08

申请人： Takanori Hisada ,  Masahiko Yatsu ,  Koji Hirata

发明人： Takanori Hisada ,  Masahiko Yatsu ,  Koji Hirata

IPC分类号： G03B21/14

CPC分类号： G03B21/10 ,  G02B17/0816 ,  G03B21/28

摘要： In a projection type image display apparatus, for enlarging an image on a image display apparatus 1 by means of a projection lens 2, thereby projecting the enlarged image onto a screen 6, obliquely, being inclined thereto, between the projection lens 2 and a rear-surface mirror 5, there are disposed free shaped surface mirrors 3 and 4, each having a free shaped surface for compensating a trapezoidal distortion due to oblique projection of the enlarged image. The surface configuration of the free shaped surface mirror is so shaped as to satisfy a following equation: |L1−L2|>1.4·Dv if assuming that a distance for a light beam of an upper end of the enlarged image to reach the screen after being reflected upon a free shaped surface is “L1”, a distance for a light beam of a lower end of the enlarged image to reach the screen after being reflected upon the free shaped surface is “L2”, and a distance from an upper end of an image on the screen to a lower end thereof is “Dv”.

摘要翻译： 在投影型图像显示装置中，为了通过投影透镜2放大图像显示装置1上的图像，从而将放大图像倾斜地投影到屏幕6上，在投影透镜2和后方 表面镜5设置有自由形状的表面镜3和4，每个具有自由形状的表面，用于补偿由于放大图像的倾斜投影引起的梯形失真。 自由形状的表面镜的表面形状被形成为满足以下等式：<？in-line-formula description =“In-line formula”end =“lead”？> | L1-L2 |> 1.4.Dv 如果假设放大图像的上端的光束的距离在自由形状的反射之后到达屏幕，则<？in-line-formula description =“In-line Formulas”end =“tail”？> 表面为“L1”，放大图像的下端的光束在被自由形状的表面反射之后到达屏幕的距离为“L2”，并且距离屏幕上的图像的上端的距离 到其下端是“Dv”。

公开(公告)号：US20060012755A1

公开(公告)日：2006-01-19

申请号：US11227276

申请日：2005-09-16

申请人： Hidehiro Ikeda ,  Masahiko Yatsu ,  Koji Hirata ,  Junichi Ikoma

发明人： Hidehiro Ikeda ,  Masahiko Yatsu ,  Koji Hirata ,  Junichi Ikoma

IPC分类号： G03B21/26

CPC分类号： G03B21/26 ,  G02B13/02

摘要： A projection type image display apparatus having an image display element outputting an image ray, a projection lens apparatus for performing overhead projection of the image ray from the image display element, the projection lens apparatus having a plurality of lens elements, a reflection mirror reflecting the image ray from the projection lens apparatus, and a screen on which the image ray reflected by the reflection mirror is projected.

摘要翻译： 具有输出图像光线的图像显示元件的投影型图像显示装置，用于从图像显示元件进行图像射线的投射的投影透镜装置，具有多个透镜元件的投影透镜装置，反射镜 来自投影透镜装置的图像光线以及由反射镜反射的图像射线投射到的屏幕。

公开(公告)号：US06945651B2

公开(公告)日：2005-09-20

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 ,  G03B21/14

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：US20050036120A1

公开(公告)日：2005-02-17

申请号：US10865643

申请日：2004-06-09

申请人： Koji Hirata ,  Shuji Kato ,  Masahiko Yatsu ,  Tsutomu Nakashima ,  Hidehiro Ikeda

发明人： Koji Hirata ,  Shuji Kato ,  Masahiko Yatsu ,  Tsutomu Nakashima ,  Hidehiro Ikeda

IPC分类号： G02B13/18 ,  G02B13/16 ,  G02B13/24 ,  G02B21/00 ,  G02B27/18 ,  G03B21/00 ,  G03B21/10 ,  G03B21/20 ,  H04N9/31

CPC分类号： G03B21/006

摘要： In a projection type image display apparatus, a projector optical unit for projecting an image onto a screen while magnifying a size of the image to be projected with respect to an original size of the image displayed by an image forming element, has a group of lenses for magnifying the size of the image with respect to the original size thereof, and an optical path extending from the image forming element to the screen to transmit the image along the optical path.

摘要翻译： 在投影型图像显示装置中，投影光学单元用于将图像投影到屏幕上，同时相对于由图像形成元件显示的图像的原始尺寸放大要投影的图像的尺寸，具有一组透镜 用于相对于其原始尺寸放大图像的尺寸，以及从图像形成元件延伸到屏幕以沿着光路传输图像的光路。

公开(公告)号：US08403504B2

公开(公告)日：2013-03-26

申请号：US12900554

申请日：2010-10-08

申请人： Koji Hirata ,  Masahiko Yatsu ,  Takanori Hisada

发明人： Koji Hirata ,  Masahiko Yatsu ,  Takanori Hisada

IPC分类号： G03B21/28

CPC分类号： G03B21/28

摘要： In a projection type display apparatus for enabling to display an image, by projecting an image on an image display element(s), enlargedly, upon a nearly horizontal surface, such as, a table, a reflection mirror for reflecting a light from a light source is so disposed that an optical axis of the light source is nearly perpendicular to an optical axis of a lens group having a plural number of lens elements, which are disposed symmetric with respect to the optical axis.

公开(公告)号：US08337021B2

公开(公告)日：2012-12-25

申请号：US12776081

申请日：2010-05-07

申请人： Nobuyuki Kimura ,  Koji Hirata ,  Masahiko Yatsu

发明人： Nobuyuki Kimura ,  Koji Hirata ,  Masahiko Yatsu

IPC分类号： G03B21/14 ,  G03B21/28 ,  F21V9/00 ,  G02B5/30 ,  G02B27/28

CPC分类号： G02B13/18 ,  G02B13/16 ,  G02B27/0025 ,  G02B27/14 ,  G02B27/283 ,  G03B21/10 ,  H04N9/3105 ,  H04N9/3167

摘要： A projection type image display device using, in a projection optical system thereof, a flat mirror, which is easy to design and manufacture, as a projection mirror is provided. The projection optical system is a diagonal projection optical system and includes plural lenses. Among the plural lenses, the one disposed closest to the flat mirror has an effective area, along the vertical direction of an image, through which a light beam passes and which is off an optical axis of the other plurality of lenses, shared by the most lenses so as not to allow light reflected from the projection mirror to return to the projector body. A polarization converter using, for example, a quarter wavelength plate is provided at an output surface of a crossed prism to decrease reflectance differences between differently colored light and to thereby prevent the occurrence of color unevenness.

摘要翻译： 提供一种投影型图像显示装置，其在其投影光学系统中使用易于设计和制造的平面镜作为投影镜。 投影光学系统是对角投影光学系统，包括多个透镜。 在多个透镜中，最靠近平面镜布置的一个透镜具有沿着图像的垂直方向的有效面积，光束通过该有效面积而离开其他多个透镜的光轴，最多共享 透镜，以便不允许从投影镜反射的光返回到投影机主体。 使用例如四分之一波长板的偏振转换器设置在交叉棱镜的输出表面，以减少不同颜色的光之间的反射率差异，从而防止颜色不均匀的发生。

公开(公告)号：US20120229777A1

公开(公告)日：2012-09-13

申请号：US13473025

申请日：2012-05-16

申请人： Koji HIRATA ,  Takanori Hisada ,  Masahiko Yatsu

发明人： Koji HIRATA ,  Takanori Hisada ,  Masahiko Yatsu

IPC分类号： G03B21/14

CPC分类号： G03B21/28 ,  G02B17/0852 ,  G03B21/145 ,  H04N9/317

摘要： A projection type image display apparatus includes a first lens group including a plural number of lenses being disposed in a direction of propagation light with respect to an image display element, a second lens group including a plural number of lenses being disposed in a direction of propagation light with respect to said first lens group and a reflection mirror, which is configured to reflect light emitted from at least one of said first and second lens groups, so as to project the light obliquely upon a screen. A ratio (Lo/Lp) of a diagonal size (Lo) of said screen and a distance (Lp) from a center of said reflection mirror to said screen is at least 2, and the second lens group includes a refractive lens having a negative power and a rotationally symmetric surface configuration.

摘要翻译： 投影型图像显示装置包括：第一透镜组，其包括相对于图像显示元件沿传播光的方向设置的多个透镜;第二透镜组，包括沿传播方向设置的多个透镜; 相对于所述第一透镜组的光和反射镜，被配置为反射从所述第一和第二透镜组中的至少一个发射的光，以将光倾斜地投射在屏幕上。 所述屏幕的对角线尺寸（Lo）和从所述反射镜的中心到所述屏幕的距离（Lp）的比（Lo / Lp）至少为2，并且所述第二透镜组包括具有负的折射透镜 功率和旋转对称的表面配置。