公开(公告)号：US5613748A

公开(公告)日：1997-03-25

申请号：US634699

申请日：1996-04-18

申请人： Takahiko Yoshida ,  Koji Hirata ,  Atsuo Ohsawa ,  Kiyoshi Wada ,  Hiroki Yoshikawa

发明人： Takahiko Yoshida ,  Koji Hirata ,  Atsuo Ohsawa ,  Kiyoshi Wada ,  Hiroki Yoshikawa

IPC分类号： G09G3/18 ,  G03B21/28 ,  G03B21/62 ,  G03B21/625 ,  H04N5/74

CPC分类号： G03B21/28 ,  G03B21/625

摘要： A transmission screen for a rear projection type image display apparatus having at least one image generation source for displaying images, at least one projection lens for enlarging and projecting images displayed on the at least one image generation source onto a rear portion of the transmission screen for display. The transmission screen of the image display apparatus enables display of the images projected onto the transmission screen with a contrast of at least 70. Further, the transmission screen enables display with a field angle within a range of at least 72.degree. to less than 100.degree.. The transmission screen also includes a glossy light absorbing layer and a substantially smooth mirror surface at a light exit surface thereof.

摘要翻译： 一种具有至少一个用于显示图像的图像产生源的后投影型图像显示装置的透射屏幕，至少一个用于将显示在至少一个图像产生源上的图像放大并投影到投影屏幕的后部的投影透镜， 显示。 图像显示装置的透射屏幕能够以至少70°的对比度显示投影到透射屏幕上的图像。此外，透射屏幕能够以至少72°至小于100°的范围内的视场角显示 。 透射屏幕还包括光泽光吸收层和在其光出射表面处的基本平滑的镜面。

公开(公告)号：US07403335B2

公开(公告)日：2008-07-22

申请号：US11011188

申请日：2004-12-15

申请人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

发明人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

IPC分类号： G03B21/60 ,  G03B21/00 ,  G03B21/26 ,  G03B21/14 ,  G03B21/28

CPC分类号： G03B21/10 ,  G03B21/625

摘要： The present invention provides a screen suitable for reducing the longitudinal dimension of a set. The present invention includes two prism sections. One is a totally reflective prism section (10) provided at the image generation source side of a Fresnel lens sheet (6). The other is a refractive prism section (11) provided at the image-watching side of the Fresnel lens sheet. The refractive prism section (11) includes a refractive face (e) for refracting incident light and making the light exit toward the image-watching side, a plane (f) approximately parallel to the principal plane of the Fresnel lens sheet, and a connection face (g) for continuously forming the face (e) and the plane (f).

摘要翻译： 本发明提供了一种适于减小组的纵向尺寸的屏幕。 本发明包括两个棱镜部分。 一个是设置在菲涅耳透镜片（6）的图像生成源侧的全反射棱镜部（10）。 另一个是设置在菲涅尔透镜片的图像观看侧的折射棱镜部分（11）。 折射棱镜部分（11）包括用于折射入射光并使光从摄像侧射出的折射面（e），大致平行于菲涅尔透镜片的主平面的平面（f），以及连接 面（g）用于连续地形成面（e）和平面（f）。

公开(公告)号：US20070103604A1

公开(公告)日：2007-05-10

申请号：US11592176

申请日：2006-11-03

申请人： Hiroki Yoshikawa ,  Takanori Hisada ,  Tetsu Ohishi ,  Koji Hirata ,  Naoyuki Ogura

发明人： Hiroki Yoshikawa ,  Takanori Hisada ,  Tetsu Ohishi ,  Koji Hirata ,  Naoyuki Ogura

IPC分类号： H04N5/74

CPC分类号： G03B21/10 ,  G03B21/147 ,  G03B21/28 ,  H04N5/74

摘要： An image that has been displayed on the display screen of an image generator 1 is first passed through a projection lens section 2 consisting of a front group and a rear group. Next after being reflected on the reflecting surface of a free-form surface mirror 5, the image is further reflected by a planar reflecting mirror 4 and then obliquely projected from the lower section of a projection screen 3 onto the screen 3. The front group of the projection lens section 2 is provided for enlarging the image. In order to correct aberration due to oblique projection onto the projection screen, the rear group uses a free-form surface lens that forms a concave shape with respect to the exit side of light from the lens. The free-form surface mirror 5 corrects trapezoidal distortion due to oblique projection onto the projection screen. The free-form surface lens in the rear group of the projection lens section 2 can accommodate changes in environmental conditions by using one edge as a reference edge and rendering the other edge expandable. The free-form surface mirror can likewise use one edge as a reference edge and render the other edge expandable. For adjustment, the free-form surface mirror can also be pivoted about the reference edge.

摘要翻译： 在图像生成器1的显示画面上显示的图像首先通过由前组和后组构成的投影透镜部2。 接下来，在自由曲面镜5的反射面上反射后，图像被平面反射镜4进一步反射，然后从投影屏3的下部倾斜地突出到屏幕3上。 投影透镜部分2的前组被设置用于放大图像。 为了校正由于倾斜投影到投影屏幕上的像差，后组使用相对于来自透镜的光的出射侧形成凹形的自由曲面透镜。 自由曲面镜5校正由于倾斜投影到投影屏幕上的梯形变形。 投影透镜部2的后组中的自由曲面透镜可以通过使用一个边缘作为参考边缘并使另一个边缘可扩展来适应环境条件的变化。 自由曲面镜同样可以使用一个边缘作为参考边缘，并使另一个边缘可扩展。 为了调整，自由曲面反射镜也可围绕参考边缘枢转。

公开(公告)号：US07095558B2

公开(公告)日：2006-08-22

申请号：US10857647

申请日：2004-05-28

申请人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

发明人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

IPC分类号： G03B21/60 ,  G03B21/28 ,  G02B3/08 ,  G02B5/04

CPC分类号： G03B21/60

摘要： A total reflecting prism portion is formed on an image generation source side of a Fresnel lens sheet which constitutes a rear projection type screen. The total reflecting prism portion is formed in an area in which the angle of incidence of a projection image projected from an optical part on the Fresnel lens sheet is at least about 40·. The total reflecting prism portion causes incident light to be outputted as output light at a predetermined output angle by a total reflection phenomenon after a first refraction phenomenon. A refracting prism portion is formed on an image monitoring side of the Fresnel lens sheet. The refracting prism portion is formed in an area opposed to the portion where the total reflecting prism portion is not formed. The refracting prism portion causes incident light to be outputted as output light at a predetermined output angle by a second refraction phenomenon.

摘要翻译： 全反射棱镜部分形成在构成背投式屏幕的菲涅尔透镜片的图像产生源侧上。 全反射棱镜部分形成在从菲涅尔透镜片上的光学部件投影的投影图像的入射角至少为40°的区域中。总反射棱镜部分使入射光输出为输出 以第一折射现象之后的全反射现象以预定的输出角度发光。 折射棱镜部分形成在菲涅尔透镜片的图像监视侧。 折射棱镜部分形成在与未形成全反射棱镜部分的部分相对的区域中。 折射棱镜部分使入射光作为输出光以预定的输出角输出第二折射现象。

公开(公告)号：US20060001966A1

公开(公告)日：2006-01-05

申请号：US11065292

申请日：2005-02-25

申请人： Tetsu Ohishi ,  Hiroki Yoshikawa ,  Koji Hirata ,  Daisuke Imafuku

发明人： Tetsu Ohishi ,  Hiroki Yoshikawa ,  Koji Hirata ,  Daisuke Imafuku

IPC分类号： G02F1/1335

CPC分类号： G02B3/005 ,  G02B3/08 ,  G02B5/0231 ,  G02B5/0242 ,  G02B5/0278 ,  G02B5/045 ,  G03B21/10 ,  G03B21/625

摘要： Images that are bright even on the periphery of a transmissive screen are obtained by reducing reflection loss of the screen when the screen incident angle of the image light entering the upper left and right ends of the screen increases. Incident-side prisms (10), each having at least a plane-of-incidence (c) onto which light comes in, an exit face (d) from which the light that has come in from the plane-of-incidence exits after being refracted, and a refractive face (e) on which the light that has exited from the exit face is refracted and then guided to the image-viewing side of the Fresnel lens sheet (6), are provided in the range where the incident angle of the incoming light becomes equal to or greater than approximately 40 degrees.

摘要翻译： 当透过屏幕的周围的图像光线进入屏幕的左上端和右端的屏幕入射角增加时，通过减少屏幕的反射损失来获得甚至在透射屏幕周边的亮度的图像。 每个入射侧棱镜（10）至少具有入射平面（c），光入射到其上，出射面（d）从入射面入射的光从该入射面 被折射，并且其中从出射面退出的光被折射并导引到菲涅尔透镜片（6）的图像观看侧的折射面（e）设置在入射角 的入射光变得等于或大于约40度。

公开(公告)号：US4824224A

公开(公告)日：1989-04-25

申请号：US948251

申请日：1986-12-31

申请人： Kyohei Fukuda ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Koji Hirata ,  Soichi Sakurai

发明人： Kyohei Fukuda ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Koji Hirata ,  Soichi Sakurai

IPC分类号： H04N5/74 ,  G02B3/04 ,  G02B9/34 ,  G02B9/60 ,  G02B13/16 ,  G02B13/18 ,  G02B3/02 ,  H04N5/72

CPC分类号： G02B9/34 ,  G02B13/16 ,  G02B13/18 ,  G02B3/04

摘要： An improved lens system for a projection television is described. The lens system is designed to be used with a cathode ray tube having a face glass with an aspheric surface having phosphor elements mounted thereto. The aspheric surface of the face glass has its maximum radius at the optical axis and is of lesser radius outwardly thereof. From the screen, the lens system companies a first aspheric lens of relatively weak power, a second biconvex lens of relatively high positive power, a third aspheric lens of weak positive power and a fourth lens having a concave face on its screen sider and of relatively large negative power.

摘要翻译： 描述了用于投影电视的改进的透镜系统。 透镜系统设计成与具有带有安装有荧光体元件的非球面的面玻璃的阴极射线管一起使用。 面玻璃的非球面表面在光轴处具有最大半径，并且其外侧具有较小的半径。 从屏幕上看，透镜系统公司具有功率相对较弱的第一非球面透镜，具有相对高正功率的第二双凸透镜，弱正功率的第三非球面透镜和在屏幕上具有凹面的第四透镜，并且相对 大负功率

公开(公告)号：US07961400B2

公开(公告)日：2011-06-14

申请号：US12536163

申请日：2009-08-05

申请人： Hiroki Yoshikawa ,  Takanori Hisada ,  Tetsu Ohishi ,  Koji Hirata ,  Naoyuki Ogura

发明人： Hiroki Yoshikawa ,  Takanori Hisada ,  Tetsu Ohishi ,  Koji Hirata ,  Naoyuki Ogura

IPC分类号： G02B9/00 ,  G02B17/00

CPC分类号： G02B17/0852

摘要： A projection image display device is disclosed in which a trapezoidal distortion and/or aberration are restrained when an image is enlarged and projected obliquely onto a screen. An image generator is connected to an optical system base in such a manner that at least an inclination thereof (on an axis parallel to X axis) with respect to a vertical line and a distance thereof in forward and backward direction (Z axis direction) can be adjusted by an adjusting mechanism. Further, a projecting lens 2 as a first optical system and a free-form curved surface mirror as a second optical system are fixed to the optical system base. The free-form curved surface mirror is rotatable (on an rotary axis parallel to X axis) with respect to the vertical line at a substantial center of the free-form curved surface mirror.

摘要翻译： 公开了一种投影图像显示装置，其中当图像被放大并倾斜地投影到屏幕上时，限制了梯形失真和/或像差。 图像发生器以这样的方式连接到光学系统基座，使得至少其相对于垂直线（在X轴上平行的轴线）的倾斜度及其在前后方向（Z轴方向）上的距离可以 通过调整机构进行调整。 此外，作为第一光学系统的投影透镜2和作为第二光学系统的自由曲面镜被固定到光学系统基座。 自由曲面镜在相对于自由曲面镜的大致中心处的垂直线是可旋转的（在平行于X轴的旋转轴上）。

公开(公告)号：US07670007B2

公开(公告)日：2010-03-02

申请号：US11473087

申请日：2006-06-23

申请人： Takanori Hisada ,  Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Naoyuki Ogura

发明人： Takanori Hisada ,  Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Naoyuki Ogura

IPC分类号： G03B21/14 ,  G03B21/28 ,  G02B7/02

CPC分类号： G03B21/10 ,  G02B3/02 ,  G02B13/16 ,  G02B13/18 ,  G02B27/0025 ,  G03B21/147 ,  G03B21/28

摘要： A projection display is capable of suppressing both the trapezoidal distortion of an enlarged image projected on a screen by oblique projection and aberrations resulting from oblique projection and includes a projection optical system provided with lenses that can be easily manufactured and assembled. The projection optical system for obliquely projecting an image formed by a display device on the screen includes a free curved lens having a rotationally asymmetric free curved surface. The free curved lens has fringing parts having outlines of a shape coinciding with an arc of a circle having the center on the optical axis of the free curved lens.

摘要翻译： 投影显示器能够通过倾斜投影和由倾斜投影产生的像差来抑制投影在屏幕上的放大图像的梯形失真，并且包括具有容易制造和组装的透镜的投影光学系统。 用于将由显示装置形成的图像倾斜投影在屏幕上的投影光学系统包括具有旋转非对称自由曲面的自由曲面透镜。 自由弯曲透镜具有边缘部分，其具有与具有在自由曲面透镜的光轴上的中心的圆弧重合的形状轮廓。

公开(公告)号：US07467872B2

公开(公告)日：2008-12-23

申请号：US11258384

申请日：2005-10-26

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

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

IPC分类号： G03B21/22

CPC分类号： G03B21/10 ,  G02B13/16 ,  G02B27/0025

摘要： In the image display device, a projection lens including a plurality of lenses for enlarging an image from an image display element is constituted of a front group and a rear group. The rear group includes at least one free-shaped-surface lens including a surface having a rotationally asymmetrical shape. Furthermore, the device includes at least one free-shaped-surface mirror having a rotationally asymmetrical reflection surface. Accordingly, a set can be formed to be compact while correcting trapezoidal distortion and aberration.

摘要翻译： 在图像显示装置中，包括用于从图像显示元件放大图像的多个透镜的投影透镜由前组和后组构成。 后组包括至少一个具有旋转不对称形状的表面的自由形状的透镜。 此外，该装置包括至少一个具有旋转不对称反射表面的自由形状的反射镜。 因此，可以在校正梯形失真和像差的同时形成一个组合。

公开(公告)号：US07362503B2

公开(公告)日：2008-04-22

申请号：US11012157

申请日：2004-12-16

申请人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

发明人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

IPC分类号： G02B5/04 ,  G03B21/60 ,  G03B21/56

CPC分类号： G03B21/625

摘要： The present invention provides a technology that makes it possible to display high-quality images by reducing a reflection loss of the image light entering the upper left and right ends of a transmissive screen. At the image generation source side of the Fresnel lens sheet, a totally reflective prism section (10) is provided that totally reflects incident rays of light and causes the light to exit toward the image-watching side. At the image-watching side of the Fresnel lens sheet (6), a refractive prism section (11) is also provided that refracts the light entering from the totally reflective prism section (10) and causes the light to exit toward the image-watching side. The refractive prism section (11) has a roughed refractive face.

摘要翻译： 本发明提供一种通过减少进入透过屏幕的左上端和右端的图像光的反射损失来显示高质量图像的技术。 在菲涅耳透镜片的图像生成源侧，设置全反射棱镜部（10），其全反射入射光，并使光向摄像侧退出。 在菲涅尔透镜片（6）的图像观看侧，还设置有折射棱镜部（11），其折射从全反射棱镜部（10）进入的光，并使光朝向图像观看 侧。 折射棱镜部分（11）具有粗糙的折射面。