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：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。

公开(公告)号：US20070273969A1

公开(公告)日：2007-11-29

申请号：US11833855

申请日：2007-08-03

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： G02B27/28 ,  G02B27/18

CPC分类号： G02B27/48 ,  G03B21/005

摘要： Image disturbance called speckle noise occurs when an image generator has a small effective screen size and a projection lens has a small effective diameter. The present invention is intended to reduce speckle noise. In an optical projector, a viewing angle enlarging ember (60) for enlarging viewing angle or a scattering member (28) for scattering image light is disposed near an image display device (18), such as a liquid crystal panel. Speckle noise can be reduced, suppressing the deterioration of resolution and contrast.

摘要翻译： 当图像发生器具有小的有效屏幕尺寸并且投影透镜具有小的有效直径时，发生称为斑点噪声的图像干扰。 本发明旨在减少斑点噪声。 在光学投影仪中，在诸如液晶面板的图像显示装置（18）附近设置用于放大视角的观察角度放大余烬（60）或用于散射图像光的散射构件（28）。 可以减少斑点噪音，抑制分辨率和对比度的恶化。

公开(公告)号：US07245429B2

公开(公告)日：2007-07-17

申请号：US11486830

申请日：2006-07-14

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： G03B21/56 ,  G03B21/60 ,  G03B21/28 ,  G02B3/08

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. Further, 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射的投影图像的入射角至少为40°的区域中。 总反射棱镜部分使得入射光以第一折射现象之后的全反射现象以预定的输出角输出为输出光。 此外，折射棱镜部分形成在菲涅耳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：US20060132913A1

公开(公告)日：2006-06-22

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： G03B21/60 ,  G03B21/56

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：US07581838B2

公开(公告)日：2009-09-01

申请号：US11833855

申请日：2007-08-03

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： G03B21/14

CPC分类号： G02B27/48 ,  G03B21/005

摘要： Image disturbance called speckle noise occurs when an image generator has a small effective screen size and a projection lens has a small effective diameter. The present invention is intended to reduce speckle noise. In an optical projector, a viewing angle enlarging ember (60) for enlarging viewing angle or a scattering member (28) for scattering image light is disposed near an image display device (18), such as a liquid crystal panel. Speckle noise can be reduced, suppressing the deterioration of resolution and contrast.

摘要翻译： 当图像发生器具有小的有效屏幕尺寸并且投影透镜具有小的有效直径时，发生称为斑点噪声的图像干扰。 本发明旨在减少斑点噪声。 在光学投影仪中，在诸如液晶面板的图像显示装置（18）附近设置用于放大视角的观察角度放大余烬（60）或用于散射图像光的散射构件（28）。 可以减少斑点噪音，抑制分辨率和对比度的恶化。

公开(公告)号：US07261421B2

公开(公告)日：2007-08-28

申请号：US10922706

申请日：2004-08-20

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： G03B21/14

CPC分类号： G02B27/48 ,  G03B21/005

摘要： Image disturbance called speckle noise occurs when an image generator has a small effective screen size and a projection lens has a small effective diameter. The present invention is intended to reduce speckle noise. In an optical projector, a viewing angle enlarging ember (60) for enlarging viewing angle or a scattering member (28) for scattering image light is disposed near an image display device (18), such as a liquid crystal panel. Speckle noise can be reduced, suppressing the deterioration of resolution and contrast.

摘要翻译： 当图像发生器具有小的有效屏幕尺寸并且投影透镜具有小的有效直径时，发生称为斑点噪声的图像干扰。 本发明旨在减少斑点噪声。 在光学投影仪中，在诸如液晶面板的图像显示装置（18）附近设置用于放大视角的观察角度放大余烬（60）或用于散射图像光的散射构件（28）。 可以减少斑点噪音，抑制分辨率和对比度的恶化。

公开(公告)号：US20050046939A1

公开(公告)日：2005-03-03

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： G02B3/08 ,  G03B21/60 ,  G03B21/62

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射的投影图像的入射角至少为40°的区域中。 总反射棱镜部分使得入射光以第一折射现象之后的全反射现象以预定的输出角输出为输出光。 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：US07697202B2

公开(公告)日：2010-04-13

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 ,  G03B21/56 ,  G02B5/04

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：US07436593B2

公开(公告)日：2008-10-14

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： G03B21/56 ,  G03B21/60

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。