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：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）。

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：US08169708B2

公开(公告)日：2012-05-01

申请号：US13099784

申请日：2011-05-03

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： 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：US07675679B2

公开(公告)日：2010-03-09

申请号：US11474150

申请日：2006-06-22

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

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

IPC分类号： G03B21/60

CPC分类号： G03B21/62 ,  G02B3/08 ,  G02B5/045 ,  G02F1/133526 ,  G03B21/10

摘要： A Fresnel lens sheet used for an image display device is disclosed. The Fresnel lens sheet is provided with a first prism group in an area of a light entrance plane of the Fresnel lens sheet where the incident angle of light is equal to or more than a predetermined incident angle and a second prism group in an area of a light entrance plane of the Fresnel lens sheet where the incident angle of light is less than the predetermined value.

摘要翻译： 公开了一种用于图像显示装置的菲涅尔透镜片。 菲涅耳透镜片在菲涅尔透镜片的光入射面的区域中设置有第一棱镜组，其中入射角等于或大于预定入射角，并且第二棱镜组在 菲涅尔透镜片的光入射面，其入射角小于预定值。

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：US07551352B2

公开(公告)日：2009-06-23

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 ,  G03B21/60

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

摘要： To eliminate or otherwise reduce non-uniform brightness of an image of a display apparatus, an image is projected through a projection optical system having a projection lens (2), curved surface reflection mirrors (4 and 5), and a reflection mirror (6) onto a rear surface of the rear-surface projection type screen (3). The rear-surface projection type screen includes a Fresnel lens sheet (8), wherein the prism surfaces of the Fresnel lens 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 relative to a line perpendicular to the screen surface, over most of the entire surface thereof. It is possible to obtain a projection image that having uniform brightness in an image display apparatus while maintaining a thin cabinet (7) profile.

摘要翻译： 为了消除或以其他方式减少显示装置的图像的不均匀亮度，通过具有投影透镜（2），弯曲表面反射镜（4和5）和反射镜（6）的投影光学系统投影图像 ）到后表面投影型屏幕（3）的后表面上。 背面投影型屏幕包括菲涅耳透镜片（8），其中菲涅尔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大约零（0 ）相对于垂直于屏幕表面的线，在其大部分整个表面上。 在保持薄柜（7）轮廓的同时，可以获得在图像显示装置中具有均匀亮度的投影图像。

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：US20070146879A1

公开(公告)日：2007-06-28

申请号：US11474150

申请日：2006-06-22

申请人： Hiroki Yoshikawa ,  Takanori Hisada ,  Testu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

发明人： Hiroki Yoshikawa ,  Takanori Hisada ,  Testu Ohishi ,  Koji Hirata ,  Daisuke Imafuku

IPC分类号： G03B21/56

CPC分类号： G03B21/62 ,  G02B3/08 ,  G02B5/045 ,  G02F1/133526 ,  G03B21/10

摘要： A Fresnel lens sheet used for an image display device is disclosed. The Fresnel lens sheet is provided with a first prism group in an area of a light entrance plane of the Fresnel lens sheet where the incident angle of light is equal to or more than a predetermined incident angle and a second prism group in an area of a light entrance plane of the Fresnel lens sheet where the incident angle of light is less than the predetermined value.

摘要翻译： 公开了一种用于图像显示装置的菲涅尔透镜片。 菲涅耳透镜片在菲涅尔透镜片的光入射面的区域中设置有第一棱镜组，其中入射角等于或大于预定入射角，并且第二棱镜组在 菲涅尔透镜片的光入射面，其入射角小于预定值。