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：US20060092511A1

公开(公告)日：2006-05-04

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

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

摘要： For dissolving ununiformity in the brightness of a projection image within a display image apparatus, obtaining an enlarged projection image through an oblique projection of image lights onto a rear-surface projection type screen, wherein an image from an image generating source 1 is projected through a projection optical system, having a projection lens 2, curved surface reflection mirrors 4 and 5, a reflection mirror 6, from a rear surface of the rear-surface projection type screen 3, within a housing 7 being narrow in depth thereof; the rear-surface projection type screen includes a Fresnel lens sheet 8, wherein the prism surfaces of the Fresnel lens making up the Fresnel lens sheet 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, almost all over the entire surface thereof. With this, it is possible to obtain a projection image, being uniform in the brightness thereof as a whole, and thin-sizing of the image display apparatus, as well.

摘要翻译： 为了溶解显示图像装置内的投影图像的亮度的不均匀性，通过图像光的倾斜投影获得放大的投影图像到背面投影型屏幕上，其中来自图像生成源1的图像通过 投影光学系统，具有投影透镜2，曲面反射镜4和5，来自后表面投影型屏幕3的后表面的反射镜6在壳体7内的深度较窄; 后表面投影型屏幕包括菲涅耳透镜片8，其中构成菲涅尔透镜片的菲涅耳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出射角 大约零（0）度，几乎遍及其整个表面。 由此，可以获得整体上的亮度均匀的投影图像，以及图像显示装置的薄型化。

公开(公告)号：US20070002281A1

公开(公告)日：2007-01-04

申请号：US11450677

申请日：2006-06-09

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： G03B21/14

CPC分类号： G03B21/10 ,  G03B21/625

摘要： A fresnel lens sheet has a fresnel center in the vicinity of a lower end, and includes first and second fresnel lens portions respectively formed into concentrically circular shapes. The first fresnel lens portion exists inside a reference circumference, and the second fresnel lens portion exists outside the reference circumference. A conjugate point distance of the second fresnel lens portion is shorter than a conjugate point distance of the first fresnel lens portion. The reference circumference passes through vicinities of cross points between a horizontal centerline, which halves the fresnel lens sheet into upper and lower portions, and left and right ends of the fresnel lens sheet.

摘要翻译： 菲涅尔透镜片在下端附近具有菲涅耳中心，并且包括分别形成为同心圆形的第一和第二菲涅耳透镜部。 第一菲涅耳透镜部分存在于参考圆周内，第二菲涅尔透镜部分存在于参考圆周外。 第二菲涅尔透镜部分的共轭点距离比第一菲涅尔透镜部分的共轭点距离短。 参考圆周穿过菲涅耳透镜片的水平中心线之间的交叉点附近，该中心线将菲涅尔透镜片半部分分成上下部分，以及左右两端。

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：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：US20060227299A1

公开(公告)日：2006-10-12

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： G03B21/28

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：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：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：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。