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31. 发明申请

US20070273969A1 Optical Projector and Image Display Apparatus Using the Same 有权
标题翻译：光学投影仪及其使用的图像显示装置
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。

32. 发明授权

US07245429B2 Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheet 有权
标题翻译：图像显示装置，图像显示装置中使用的背投型屏幕，菲涅耳透镜片，以及制造菲涅尔透镜片的方法
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。

33. 发明申请

US20060227432A1 Projecting optical unit and projecting type image display apparatus therewith 有权
标题翻译：投影光学单元和投影型图像显示装置
公开(公告)号：US20060227432A1
公开(公告)日：2006-10-12
申请号：US11280821
申请日：2005-11-17
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： G02B17/00
CPC分类号： G02B17/0852
摘要： The invention provides a projection image display device in which a trapezoidal distortion and/or aberration are restrained when an image is enlarged and projected obliquely onto a screen and an assembling and adjusting are easily done, and a projection optical unit usable for the device. 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：本发明提供了一种投影图像显示装置，其中当图像被放大并倾斜投影到屏幕上并且容易地进行组装和调整时，其中抑制了梯形失真和/或像差，以及可用于该装置的投影光学单元。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）。

34. 发明申请

US20060132913A1 Screen, a fresnel lens sheet used for the screen, and an image display apparatus using the screen 有权
标题翻译：屏幕，用于屏幕的菲涅尔透镜片以及使用该屏幕的图像显示装置
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。

35. 发明授权

US07697202B2 Screen, fresnel lens sheet used for the same, and image display apparatus using the same 失效
标题翻译：用于其的屏幕，菲涅尔透镜片和使用其的图像显示装置
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。

36. 发明授权

US07586687B2 Projecting optical unit and projecting type image display apparatus therewith 有权
标题翻译：投影光学单元和投影型图像显示装置
公开(公告)号：US07586687B2
公开(公告)日：2009-09-08
申请号：US11280821
申请日：2005-11-17
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）。

37. 发明授权

US07535648B2 Projection type image display 失效
标题翻译：投影型图像显示
公开(公告)号：US07535648B2
公开(公告)日：2009-05-19
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： G03B21/28 , G02B3/00 , G02B9/00
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 is first passed through a projection lens section consisting of a front group and a rear group. Next after being reflected on the reflecting surface of a free-form surface mirror, the image is further reflected by a planar reflecting mirror and then obliquely projected from the lower section of a projection screen onto the screen. The front group of the projection lens section 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 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 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：在图像生成器的显示画面上显示的图像首先通过由前组和后组组成的投影透镜部。接下来，在自由形式的反射镜的反射表面上反射之后，图像被平面反射镜进一步反射，然后从投影屏幕的下部倾斜地突出到屏幕上。投影透镜部分的前组用于放大图像。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。自由曲面镜由于倾斜投影到投影屏上来校正梯形失真。投影透镜部分的后组中的自由形式的表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。

38. 发明授权

US07436593B2 Screen, fresnel lens sheet used therefor, and image display apparatus using the same 有权
标题翻译：用于此的屏幕，菲涅尔透镜片和使用其的图像显示装置
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。

39. 发明申请

US20070139623A1 Projection display, projection optical system and transmission lens or free curved lens 有权
标题翻译：投影显示，投影光学系统和透镜或自由曲面透镜
公开(公告)号：US20070139623A1
公开(公告)日：2007-06-21
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： G03B21/22
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。

40. 发明申请

US20060256433A1 Image display device, rear projection type screen used in image display device, Fresnel lens sheet, and method of making Fresnel lens sheet 有权
标题翻译：图像显示装置，图像显示装置中使用的背投型屏幕，菲涅耳透镜片，以及制造菲涅尔透镜片的方法
公开(公告)号：US20060256433A1
公开(公告)日：2006-11-16
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
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。

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