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。

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：US20050186487A1

公开(公告)日：2005-08-25

申请号：US11062438

申请日：2005-02-23

申请人： Yukio Inazuki ,  Hiroki Yoshikawa ,  Satoshi Okazaki

发明人： Yukio Inazuki ,  Hiroki Yoshikawa ,  Satoshi Okazaki

IPC分类号： G03C5/00 ,  G03F1/32 ,  G03F1/68 ,  G03F1/80 ,  G03F9/00 ,  H01L21/027

CPC分类号： G03F1/32 ,  G03F1/54 ,  G03F1/68

摘要： In a halftone phase shift mask blank comprising a halftone phase shift film on a substrate which is transparent to exposure light, the halftone phase shift film comprises a metal, silicon, and optionally oxygen and nitrogen. The halftone phase shift film experiences a phase difference change of up to 1 deg. and a transmittance change of up to 0.2% before and after it is exposed to light in a cumulative dose of 1 kJ/cm2. The halftone phase shift film has excellent resistance to exposure light, specifically high-energy exposure light of short wavelength such as ArF or F2 laser beam (193 or 157 nm).

摘要翻译： 在包括对曝光光透明的衬底上的半色调相移膜的半色调相移掩模坯料中，半色调相移膜包括金属，硅以及任选的氧和氮。 半色调相移薄膜的相位差变化达到1度。 并且以1kJ / cm 2的累积剂量暴露于光之前和之后的透射率变化高达0.2％。 半色调相移膜具有优异的耐曝光性，特别是短波长的高能量曝光光，例如ArF或F 2激光束（193或157nm）。

公开(公告)号：US20050112477A1

公开(公告)日：2005-05-26

申请号：US10968886

申请日：2004-10-21

申请人： Hiroki Yoshikawa ,  Yukio Inazuki ,  Satoshi Okazaki ,  Takashi Haraguchi ,  Yuichi Fukushima ,  Yoshihiro Ii ,  Tadashi Saga

发明人： Hiroki Yoshikawa ,  Yukio Inazuki ,  Satoshi Okazaki ,  Takashi Haraguchi ,  Yuichi Fukushima ,  Yoshihiro Ii ,  Tadashi Saga

IPC分类号： G03F1/00 ,  G03F1/32 ,  G03F1/58 ,  G03F1/68 ,  H01L21/027 ,  G21K5/00 ,  G03C5/00 ,  G03F9/00

CPC分类号： G03F1/32 ,  G03F1/84

摘要： In a phase shift mask blank comprising a phase shift multilayer film on a substrate, the phase shift multilayer film consists of at least one layer of light absorption function film and at least one layer of phase shift function film, and the light absorption function film has an extinction coefficient k which increases as the wavelength changes from 157 nm to 260 nm, and has a thickness of up to 15 nm. The phase shift mask blank has minimized wavelength dependency of transmittance and can be processed with a single dry etching gas.

摘要翻译： 在包括基板上的相移多层膜的相移掩模坯料中，相移多层膜由至少一层光吸收功能膜和至少一层相移功能膜构成，光吸收功能膜具有 消光系数k随着波长从157nm变化到260nm而增加，并且具有高达15nm的厚度。 相移掩模空白具有最小化透射率的波长依赖性并且可以用单个干蚀刻气体进行处理。

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：US6130786A

公开(公告)日：2000-10-10

申请号：US340141

申请日：1999-06-28

申请人： Atsuo Osawa ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Naoyuki Ogura

发明人： Atsuo Osawa ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Naoyuki Ogura

IPC分类号： G02B9/60 ,  G02B13/18 ,  G02B13/24 ,  G02B3/00

CPC分类号： G02B9/60 ,  G02B13/18 ,  G02B13/24

摘要： An image display device which is compact on the whole and low in cost, and which uses a plurality of projection lens systems each of which is constituted by five lens groups including a first aspherical lens group, a second aspherical lens group, a third biconvex lens group, a fourth aspherical lens group and a fifth aspherical lens group which are arranged in this order successively from a screen side, the third lens group having refractive power of not lower than 70% of the total power of the projection lens system, the respective peripheral shapes of the first and second aspherical lens groups being set to have a predetermined relation, a low-dispersion high-index glass material being used for a convex lens of a green projection lens system, a high-dispersion high-index glass material being used for convex lenses of blue and red projection lens systems.

摘要翻译： 一种整体紧凑且成本低的图像显示装置，其使用多个投影透镜系统，每个投影透镜系统由包括第一非球面透镜组，第二非球面透镜组，第三双凸透镜的五个透镜组构成 组，第四非球面透镜组和第五非球面透镜组，其从屏幕侧依次排列，第三透镜​​组的折射力不小于投影透镜系统的总功率的70％，折射率不小于投影透镜系统的总功率的70％ 第一非球面透镜组和第二非球面透镜组的周边形状被设定为具有预定关系，低分散高折射率玻璃材料用于绿色投影透镜系统的凸透镜，高分散高折射率玻璃材料为 用于蓝色和红色投影透镜系统的凸透镜。

公开(公告)号：US5400114A

公开(公告)日：1995-03-21

申请号：US938861

申请日：1992-09-01

申请人： Takahiko Yoshida ,  Koji Hirata ,  Hiroki Yoshikawa ,  Masayuki Muranaka ,  Isao Yoshizaki ,  Atsuo Osawa

发明人： Takahiko Yoshida ,  Koji Hirata ,  Hiroki Yoshikawa ,  Masayuki Muranaka ,  Isao Yoshizaki ,  Atsuo Osawa

IPC分类号： G03B21/62 ,  G03B21/60

CPC分类号： G03B21/625

摘要： A rear-projection screen for a rear-projection image display comprising a Fresnel lens sheet (2) and a lenticular lens sheet (3), or a Fresnel lens sheet (2), a lenticular lens sheet (3) and a light absorbing sheet (4). The entrance surface (21) of the Fresnel lens sheet (2) or the entrance surface (41) of the light absorbing sheet (4) is formed by contiguously and vertically arranging a plurality of horizontally elongate lenticular lenses. The thickness of the Fresnel lens sheet (2) is approximately equal to that of the lenticular lens sheet (3). The entrance surface (31) and the exit surface (32) of the lenticular lens sheet (3) are formed by contiguously and horizontally arranging a plurality of vertically elongate lenticular lenses. Particles of a light diffusing material, which is essential to the prior art rear-projection screen, are not necessarily dispersed in the base sheet (30) of the lenticular lens sheet (3). The rear-projection image display provided with this rear-projection screen has satisfactory focusing characteristics and enhanced vertical directional characteristics and is capable of displaying an image in high brightness and high contrast.

摘要翻译： 一种用于背投影像显示器的背投屏幕，包括菲涅尔透镜片（2）和双凸透镜片（3），或菲涅尔透镜片（2），双凸透镜片（3）和光吸收片 （4）。 菲涅尔透镜片（2）的入射表面（21）或光吸收片（4）的入射表面（41）通过连续且垂直地布置多个水平细长的双凸透镜而形成。 菲涅尔透镜片（2）的厚度大致等于双凸透镜片（3）的厚度。 双凸透镜片（3）的入射表面（31）和出射表面（32）通过连续且水平地布置多个垂直细长的双凸透镜而形成。 对于现有技术的背投屏幕来说，光漫射材料的颗粒不一定分散在双凸透镜片（3）的基片（30）中。 设置有该背投屏幕的背投影像显示器具有令人满意的聚焦特性和增强的垂直方向特性，并且能够以高亮度和高对比度显示图像。