公开(公告)号：US5808704A

公开(公告)日：1998-09-15

申请号：US367931

申请日：1995-01-03

申请人： Hiroki Yoshikawa ,  Takahiko Yoshida ,  Kiyoshi Wada ,  Shigeru Mori ,  Tetsu Ohishi ,  Toshimitsu Watanabe ,  Koji Suso ,  Yoshimasa Yokoyama ,  Akira Takahashi ,  Yasuhiko Komatsu ,  Yoshinori Matsumura ,  Kazunari Nakagawa ,  Kohsuke Ozeki ,  Maki Furui ,  Naoko Kubo ,  Tutomu Simada ,  Tohru Mori ,  Satoshi Ishizuka

发明人： Hiroki Yoshikawa ,  Takahiko Yoshida ,  Kiyoshi Wada ,  Shigeru Mori ,  Tetsu Ohishi ,  Toshimitsu Watanabe ,  Koji Suso ,  Yoshimasa Yokoyama ,  Akira Takahashi ,  Yasuhiko Komatsu ,  Yoshinori Matsumura ,  Kazunari Nakagawa ,  Kohsuke Ozeki ,  Maki Furui ,  Naoko Kubo ,  Tutomu Simada ,  Tohru Mori ,  Satoshi Ishizuka

IPC分类号： G03B21/10 ,  G03B21/16 ,  H04N5/44 ,  H04N5/64 ,  H04N5/74 ,  H04R5/02

CPC分类号： H04N9/3141 ,  G03B21/10 ,  G03B21/16 ,  H04N5/7408 ,  H04R5/02 ,  H04N5/642 ,  H04N7/0122

摘要： A rear projection type image display apparatus having an arrangement that a projection distance of a projection lens thereof is shortened and a density of mounting of parts relating to an optical system and an electric system is made higher. Furthermore, a width of a rear portion of a housing of the rear projection type image display apparatus is reduced rearwards at any position from the upper portion to the lower portion thereof, and the lower portion of a back cover is depressed inwards. Thus, a space required to install the rear projection type image display apparatus can be reduced, the rear surface of the apparatus can be disposed on a wall without any gap when the apparatus is installed along the wall, and the overall body of the apparatus can be received deep into a corner of walls when the apparatus is installed at the corner.

摘要翻译： 具有其投影透镜的投影距离缩短并且与光学系统和电气系统相关的部件的安装密度更高的背投型图像显示装置。 此外，背投影型图像显示装置的壳体的后部的宽度在从上部到下部的任何位置处向后减小，并且后盖的下部向内凹入。 因此，可以减少安装后投影型图像显示装置所需的空间，当装置沿壁安装时，可以将设备的后表面设置在没有任何间隙的壁上，并且装置的整体可以 当设备安装在角落时，深深地被收到墙壁的一角。

公开(公告)号：US5926153A

公开(公告)日：1999-07-20

申请号：US592177

申请日：1996-01-26

申请人： Tetsu Ohishi ,  Takahiko Yoshida ,  Hiroki Yoshikawa ,  Yutaka Matsuda ,  Hideo Tanide ,  Shigeru Mori ,  Atsuo Osawa ,  Koji Hirata

发明人： Tetsu Ohishi ,  Takahiko Yoshida ,  Hiroki Yoshikawa ,  Yutaka Matsuda ,  Hideo Tanide ,  Shigeru Mori ,  Atsuo Osawa ,  Koji Hirata

IPC分类号： G03B21/62 ,  G03B21/10 ,  G09B9/32 ,  H04N5/74 ,  B09G5/00

CPC分类号： G09B9/32

摘要： A multi-display apparatus includes a plurality of rear projection-type display devices each in which projection light from image sources is projected through projection lenses onto a rear projection surface of a rear projection screen to form a picture image on a front viewing surface of the rear projection screen, the plurality of rear projection-type display devices being combined together in contiguous relation to one another to form a large screen. An overall front viewing surface of the large screen is formed into a concave surface curved both in a horizontal visibility angle direction and a vertical visibility angle direction. A light-absorbing portion is formed on the front viewing surface of the rear projection screen, and the light-absorbing portion absorbs projection light which passes through one rear projection screen, and is incident as external light on another rear projection screen, thereby preventing a picture image from being degraded.

摘要翻译： 多显示装置包括多个后投影式显示装置，每个背投影型显示装置，其中来自图像源的投影光通过投影透镜投射到背投屏幕的后投影表面上，以在前投影屏幕的前视面上形成图像 背投影屏幕，多个后投影式显示装置彼此连续地组合在一起形成大屏幕。 大屏幕的整体前视面形成为在水平可视角度方向和垂直视角方向上均弯曲的凹面。 在后投影屏幕的前视面形成有吸光部，吸光部吸收通过一个背面投影用屏幕的投影光，作为外部光入射到另一个后投影屏上，从而防止 图片图像降级。

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：US5833340A

公开(公告)日：1998-11-10

申请号：US524173

申请日：1995-09-06

申请人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Hideo Tanide

发明人： Hiroki Yoshikawa ,  Tetsu Ohishi ,  Hideo Tanide

IPC分类号： G03B21/00 ,  G03B21/14

CPC分类号： G03B21/00

摘要： A concave mirror which has rigidity higher than an aluminum foil mirror and is light-weight and low cost compared with a polished glass mirror is composed of at least one concave mirror unit of a synthetic resin material molded to a concave shape and an aluminum reflecting layer vapor deposited on a front or rear surface of the concave mirror unit. A low cost image display device capable of projecting an image onto the concave mirror without using any specially designed projection lens includes at least a projection type cathode ray tube having a flat or substantially flat phosphor surface panel and a transmission type screen and the concave mirror. A multi-screen system which includes a plurality of the image display devices juxtaposed to provide an increased horizontal view angle is provided. Further, a sensory integration system using the image display device is provided.

摘要翻译： 与抛光的玻璃镜相比，刚性高于铝箔镜的凹镜具有重量轻且成本低的特征，由至少一个模制成凹形的合成树脂材料的凹面镜单元和铝反射层 气相沉积在凹面镜单元的前表面或后表面上。 能够将图像投影到凹面镜上而不使用任何特别设计的投影透镜的低成本图像显示装置至少包括具有平坦或基本平坦的荧光体表面面板和透射型屏幕和凹面镜的投影型阴极射线管。 提供了一种多屏幕系统，其包括并置以提供增加的水平视角的多个图像显示装置。 此外，提供了使用图像显示装置的感觉整合系统。

公开(公告)号：US07440186B2

公开(公告)日：2008-10-21

申请号：US11281819

申请日：2005-11-18

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

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

IPC分类号： G03B21/56 ,  G02B3/08

CPC分类号： G03B21/10 ,  G03B21/625

摘要： The present invention provides a technology suitable for shortening a depth of a image display apparatus while obtaining a picture of high quality. According to the invention, a total reflection prism portion is provided on a side of a Fresnel lens sheet toward a picture source. The total reflection prism portion reflects an incident light to a direction toward an optic axial center of the Fresnel lens sheet to have the same outgoing. On the other hand, a first refractive prism portion, by which light of a predetermined incident angle or less is refracted to outgo to a direction along an optical axis of the Fresnel lens sheet, and a second refractive prism portion, by which light reflected to the direction toward the optic axial center of the Fresnel lens sheet is changed to the direction along the optical axis.

摘要翻译： 本发明提供一种适于在获得高品质图像的同时缩短图像显示装置的深度的技术。 根据本发明，在菲涅尔透镜片的朝向图像源的一侧设置全反射棱镜部分。 全反射棱镜部分将入射光反射到朝向菲涅耳透镜片的光学轴向中心的方向以具有相同的出射。 另一方面，第一折射棱镜部分，通过该第一折射棱镜部分，预定入射角或更小的光被折射到沿着菲涅尔透镜片的光轴的方向偏离，并且第二折射棱镜部分被反射到 朝向菲涅尔透镜片的光轴中心的方向改变为沿着光轴的方向。

公开(公告)号：US20080204868A1

公开(公告)日：2008-08-28

申请号：US12103241

申请日：2008-04-15

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

CPC分类号： G03B21/625

摘要： An image display apparatus includes an image generation source, optics for projecting in an enlarged form the image generated by the image generation source, and a transmissive screen for displaying the image projected from said optics. The transmissive screen includes a Fresnel lens sheet disposed at an image generation source side, and a diffusing sheet disposed at an image-watching side in order to diffuse image light at least in a horizontal direction of the screen. The Fresnel lens sheet has a plurality of entrance-side prisms formed at the image generation source side, and a plurality of exit-side prisms formed at the image-watching side, and the Fresnel lens sheet emits lights in a first direction and a second direction. The first direction is almost parallel to a central axis of the Fresnel lens sheet, and the second direction extends toward the central axis.

摘要翻译： 图像显示装置包括图像生成源，用于以放大的形式投影由图像生成源生成的图像的光学器件和用于显示从所述光学器件投影的图像的透射屏幕。 透射屏幕包括设置在图像产生源侧的菲涅尔透镜片和设置在图像观看侧的扩散片，以至少在屏幕的水平方向上扩散图像光。 菲涅尔透镜片具有形成在图像产生源侧的多个入射侧棱镜和形成在图像观看侧的多个出射侧棱镜，并且菲涅耳透镜片在第一方向上发光，而第二 方向。 第一方向几乎平行于菲涅尔透镜片的中心轴线，第二方向朝向中心轴线延伸。

公开(公告)号：US20070052341A1

公开(公告)日：2007-03-08

申请号：US11452373

申请日：2006-06-14

申请人： Daisuke Imafuku ,  Hiroki Yoshikawa ,  Tetsu Ohishi

发明人： Daisuke Imafuku ,  Hiroki Yoshikawa ,  Tetsu Ohishi

IPC分类号： H01J1/62

CPC分类号： H05B33/22 ,  G09G3/3413 ,  G09G2310/024 ,  G09G2320/0626 ,  G09G2360/145 ,  H04N9/3155 ,  H04N9/3182 ,  H04N9/3194

摘要： The invention provides a technology suited to suppress decrease in the brightness of an image while preventing reduction in the contrast of the image caused by external light coming from the outside (from the viewer side of the image) of a screen. An image display surface (screen) of a projection type display device is provided with a front protective sheet including an optical filter member for absorbing specific wavelengths in the external light, especially among peak wavelengths of a three-wavelength fluorescent lamp. Moreover, LED's of three colors are used as a light source for forming an image. At least one of these LED's emits a light of a different wavelength from a peak wavelength that the front protective sheet absorbs. By this configuration, it is possible to prevent reduction in the contrast of an image caused by external light without decreasing the brightness of the image display device.

摘要翻译： 本发明提供了一种适合于抑制图像的亮度降低的技术，同时防止从外部（来自图像的观看者侧）的外部光引起的图像的对比度降低。 投影型显示装置的图像显示面（屏幕）设置有前保护片，其包括用于吸收外部光中的特定波长的滤光器构件，特别是在三波长荧光灯的峰值波长中。 此外，三种颜色的LED用作形成图像的光源。 这些LED中的至少一个发射与前保护片吸收的峰值波长不同波长的光。 通过这种配置，可以防止由外部光引起的图像的对比度降低，而不会降低图像显示装置的亮度。