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。

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：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：US07589904B2

公开(公告)日：2009-09-15

申请号：US11740319

申请日：2007-04-26

申请人： Daisuke Imafuku ,  Takanori Hisada ,  Hiroki Yoshikawa

发明人： Daisuke Imafuku ,  Takanori Hisada ,  Hiroki Yoshikawa

IPC分类号： G02B3/00 ,  G02B9/00 ,  G02B5/124 ,  G03B21/22

CPC分类号： G02B5/08 ,  G03B21/10 ,  G03B21/147 ,  G03B21/28 ,  H04N9/3141

摘要： Both ends of a transparent cover which is formed of a curved member are fitted to a lens guard and a mirror guard, and a free-shaped surface mirror and a free-shaped surface lens are housed in a sealed space defined within a projection type image display device.

摘要翻译： 由弯曲构件形成的透明盖的两端装配到透镜防护件和镜子防护罩中，并且自由形状的反射镜和自由形状的表面透镜容纳在限定在投影型图像内的密封空间中 显示设备。

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：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：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。