公开(公告)号：US07081927B2

公开(公告)日：2006-07-25

申请号：US10978528

申请日：2004-11-02

申请人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

发明人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

IPC分类号： H04N9/31 ,  G02E1/135

CPC分类号： H04N9/3141 ,  G02B13/16 ,  G03B21/10 ,  H04N5/7441 ,  H04N9/3108 ,  H04N9/3144 ,  H04N9/317

摘要： An optical projection apparatus includes an optical lighting system provided with a polarized beam splitter for polarizing white light flux from a white light source and combining the white light flux with other light fluxes, thereby taking out a predetermined polarized wave; a multi-lens array consisting of a plurality of lens elements; and an irradiator for separating the white light flux into three primary color light fluxes of red, green, and blue and irradiating each of the three color light fluxes on the same display element at an angle different from the others; and a projecting lens unit used for projecting the three primary color light fluxes modulated by the display element. Color light fluxes modulated by the display element are separated in a horizontal direction of the screen of the display element when passing an injection pupil of the projection lens unit.

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：US06956624B2

公开(公告)日：2005-10-18

申请号：US10447999

申请日：2003-05-30

申请人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

发明人： Koji Hirata ,  Naoyuki Ogura ,  Masahiko Yatsu ,  Hidehiro Ikeda

IPC分类号： G02B5/26 ,  G02B5/30 ,  G02B13/16 ,  G02B13/18 ,  G02B13/22 ,  G02F1/13 ,  G02F1/1335 ,  G03B21/00 ,  G03B21/10 ,  G03B33/12 ,  H04N5/74 ,  H04N9/31 ,  H04N5/64

CPC分类号： H04N9/3141 ,  G02B13/16 ,  G03B21/10 ,  H04N5/7441 ,  H04N9/3108 ,  H04N9/3144 ,  H04N9/317

摘要： An optical projection apparatus includes an optical lighting system provided with a polarized beam splitter for polarizing a white light flux received from a white light source and combining the white light flux with other light fluxes, thereby taking out a predetermined polarized wave; a multi-lens array consisting of a plurality of lens elements; and an irradiator for separating the white light flux into three primary color light fluxes of red, green, and blue and irradiating each of the three color light fluxes on the same display element at an angle different from the others; and a projector for projecting the three primary color light fluxes modulated by the display element. The optical lighting system and the projector are disposed between the white light source and the display element.

摘要翻译： 光学投影装置包括：光学照明系统，设置有偏振分束器，用于偏振从白色光源接收的白色光束，并将白色光束与其他光束组合，从而取出预定的偏振波; 由多个透镜元件组成的多透镜阵列; 以及用于将白光束分离为红色，绿色和蓝色的三原色光束的照射器，并且以与其它不同的角度在同一显示元件上照射三种颜色光束中的每一种; 以及用于投影由显示元件调制的三原色光束的投影仪。 光学照明系统和投影仪设置在白色光源和显示元件之间。

公开(公告)号：US20050146786A1

公开(公告)日：2005-07-07

申请号：US10953413

申请日：2004-09-28

申请人： Hidehiro Ikeda ,  Koji Hirata ,  Shuji Kato ,  Masahiro Yamamoto ,  Masahiko Yatsu

发明人： Hidehiro Ikeda ,  Koji Hirata ,  Shuji Kato ,  Masahiro Yamamoto ,  Masahiko Yatsu

IPC分类号： G02B13/16 ,  G02B27/14 ,  G02F1/13 ,  G02F1/1335 ,  G03B21/10 ,  G03B21/14 ,  H04N5/74 ,  H04N17/00 ,  G03B21/56 ,  G02B3/00 ,  G02B9/00

CPC分类号： G02B27/1046 ,  G02B13/16 ,  G02B27/145 ,  G02B27/149 ,  H04N5/74 ,  H04N5/7441 ,  H04N9/3105 ,  H04N9/3141 ,  H04N9/3185

摘要： A compact rear projection image display apparatus in which the projection distance in a projection optical system is substantially reduced and no reflection mirror is used, thereby eliminating a major cause of image trapezoidal distortion. The rear projection image display apparatus has a projection lens system which includes a first lens group with positive refractive power and a second lens group which further enlarges an image enlarged by the first lens group. The projection lens system enlarges and projects an image displayed on an image display device, on a transmission screen. No reflection mirror is provided between the second lens group and the transmission screen and the image enlarged by the second lens group is directly projected on the transmission screen.

摘要翻译： 一种紧凑的背投影像显示装置，其中投影光学系统中的投影距离大大减小，并且不使用反射镜，从而消除了图像梯形失真的主要原因。 背投影像显示装置具有投影透镜系统，该投影透镜系统包括具有正屈光力的第一透镜组和第二透镜组，该第二透镜组进一步放大由第一透镜组放大的图像。 投影透镜系统在透射屏幕上放大并投影显示在图像显示装置上的图像。 在第二透镜组和透射屏之间没有设置反射镜，并且由第二透镜组放大的图像直接投影在透射屏上。

公开(公告)号：US20050140926A1

公开(公告)日：2005-06-30

申请号：US11009053

申请日：2004-12-13

申请人： Koji Hirata ,  Tsutomu Nakashima ,  Masahiko Yatsu

发明人： Koji Hirata ,  Tsutomu Nakashima ,  Masahiko Yatsu

IPC分类号： G02F1/13 ,  G02B27/18 ,  G02F1/1335 ,  G02F1/13357 ,  G03B21/00 ,  G03B21/10 ,  G03B21/14 ,  H04N5/74 ,  H04N9/31

CPC分类号： H04N9/3105

摘要： The present invention provides a projection type image display device capable of affording a bright display of a high saturation and capable of ensuring a high reliability of optical parts. The projection type image display device is provided with a color synthesizer for color-synthesizing modulated and polarized light of red light, green light, and blue light, outputted from an image display element. The color synthesizer has an optical characteristic such that the transmittance including reflection by a reflecting film in the interior of the color synthesizer becomes highest for the polarized light of blue light out of the modulated and polarized light of red light, that of green light, and that of blue light. The color synthesizer also has an optical characteristic such that the quantity of the polarized light of blue light outputted becomes largest out of the modulated and polarized light of red light, green light, and blue light.

摘要翻译： 本发明提供了能够提供高饱和度的明亮显示并且能够确保光学部件的高可靠性的投影型图像显示装置。 投影型图像显示装置设置有用于对从图像显示元件输出的红光，绿光和蓝光的调制偏振光进行颜色合成的颜色合成器。 彩色合成器具有这样的光学特性，使得包括彩色合成器内部的反射膜的反射的透射率对于红光的调制偏振光和绿光的偏振光中的蓝色光的偏振光变得最高，以及 蓝光。 彩色合成器还具有使得输出的蓝光的偏振光的量在红光，绿光和蓝光的调制偏振光中变得最大的光学特性。

公开(公告)号：US20050122724A1

公开(公告)日：2005-06-09

申请号：US10105916

申请日：2002-03-20

申请人： Koji Hirata ,  Ryuji Kurihara ,  Nobuo Masuoka

发明人： Koji Hirata ,  Ryuji Kurihara ,  Nobuo Masuoka

IPC分类号： G02B5/08 ,  F21V7/06 ,  F21V7/08 ,  F21V7/10 ,  F21V7/20 ,  F21V7/22 ,  F21W131/40 ,  F21Y101/00 ,  G02B5/10 ,  G02F1/13357 ,  G03B21/00 ,  G03B21/14 ,  G03B21/16 ,  H01J61/073 ,  H01J61/30 ,  H01J61/50 ,  H01J61/52 ,  H01J61/88 ,  H04N5/74

CPC分类号： F21V7/22 ,  F21V29/505 ,  H04N5/74 ,  H04N9/3144 ,  H04N9/315

摘要： A projector light source which facilitates molding of a reflector for obtaining a complicated reflecting surface and provides an improved cooling efficiency, which is characterized by molding the reflector of the light source using heat resistant plastic mixed with a high heat conductive material, whereby a molding accuracy is drastically improved compared to a heat resistant glass reflector, and a highly efficient light source is implemented by increasing a degree of design freedom using a high-order non-spherical reflecting surface. Furthermore, heat conductivity is increased by the use of a high heat conductive material for the reflector and heat dissipation to an outside is facilitated.

摘要翻译： 一种投影光源，其能够成型反射器以获得复杂的反射面并提供改善的冷却效率，其特征在于使用与高导热材料混合的耐热塑料模制光源的反射器，由此成型精度 与耐热玻璃反射器相比显着提高，并且通过使用高次非球面反射表面增加设计自由度来实现高效光源。 此外，通过使用用于反射器的高导热材料来增加导热性，并且便于对外部的散热。

公开(公告)号：US20050117123A1

公开(公告)日：2005-06-02

申请号：US10921938

申请日：2004-08-20

申请人： Masahiko Yatsu ,  Koji Hirata ,  Hidehiro Ikeda

发明人： Masahiko Yatsu ,  Koji Hirata ,  Hidehiro Ikeda

IPC分类号： G02B13/24 ,  G02B9/12 ,  G02B13/18 ,  G02B13/22 ,  G02B27/18 ,  G02F1/13 ,  G02F1/1335 ,  G03B21/00 ,  G03B21/14

CPC分类号： G02B13/22 ,  G03B21/142

摘要： A projection optical unit has two lens groups. A first projection optical unit disposed closest to an image display element, temporarily forms a first enlarged image (magnification: M1) at the image display element side, rather than at a second projection optical unit. The first enlarged image is subsequently projected in an enlarged form (magnification: M2, wherein M2>M1) onto a screen via the second projection optical unit. A field lens group having positive refractive power is disposed between the first projection optical unit and the second projection optical unit. Consequently, the relationship between F2, which is the F-value of the second projection optical unit, and F1, which is the F-value of the first projection optical unit, becomes F2=F1/M1, whereby it is possible to realize very-wide-angle imaging at a field angle exceeding 90 degrees.

摘要翻译： 投影光学单元具有两个透镜组。 靠近图像显示元件设置的第一投影光学单元在图像显示元件侧暂时形成第一放大图像（倍率：M1），而不是在第二投影光学单元处形成。 随后经由第二投影光学单元以放大的形式（倍率：M2，其中M2> M1）将第一放大图像投影到屏幕上。 具有正折光力的场透镜组设置在第一投影光学单元和第二投影光学单元之间。 因此，作为第二投影光学单元的F值的F2与作为第一投影光学单元的F值的F1之间的关系变为F2 = F1 / M1，从而可以非常实现 场角超过90度的全角度成像。

公开(公告)号：US06829031B2

公开(公告)日：2004-12-07

申请号：US10337400

申请日：2003-01-07

申请人： Toru Numata ,  Yasuo Otsuka ,  Mikio Shiraishi ,  Koji Hirata ,  Naoyuki Ogura ,  Shigeru Inaoka ,  Kazunari Nakagawa ,  Shigeru Mori ,  Masahiko Yatsu

发明人： Toru Numata ,  Yasuo Otsuka ,  Mikio Shiraishi ,  Koji Hirata ,  Naoyuki Ogura ,  Shigeru Inaoka ,  Kazunari Nakagawa ,  Shigeru Mori ,  Masahiko Yatsu

IPC分类号： G02F11333

CPC分类号： H04N9/3141 ,  G02F1/133308 ,  G02F1/133385 ,  G02F1/133528 ,  H04N5/7441 ,  H04N9/3102

摘要： For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for converting light from a light source into display picture depending on a driving signal; an optical projection system 1b containing a first optical element 1a and for projecting said light signal toward an object of projection; exit side polarizing elements 3b; a holding member 6 for holding them with the liquid crystal display element 2; and cooling medium 5; incident side polarizing elements 3a, wherein, a space is defined by either one of the incident side polarizing elements 3a and the liquid crystal display element 2, the first optical element 1a, between the liquid crystal display element 2 and the first optical element 1a, and the holding member 6, and said space is filled up with the cooling medium 5.

摘要翻译： 为了在液晶显示装置和液晶显示装置的液晶显示装置和液晶显示装置的温度升高的条件下获得高亮度，并且抑制液晶显示元件和偏振元件的温度升高，包括：液晶显示元件2，用于将来自光的光 根据驱动信号将其输入显示图像; 包含第一光学元件1a并用于将所述光信号投射到投影物体的光学投影系统1b; 出射侧偏振元件3b; 用于将其保持在液晶显示元件2上的保持构件6; 和冷却介质5; 入射侧偏振元件3a，其中，由液晶显示元件2和第一光学元件1a之间的入射侧偏振元件3a和液晶显示元件2中的任一个，第一光学元件1a， 和保持构件6，并且所述空间被冷却介质5填充。

公开(公告)号：US06783242B1

公开(公告)日：2004-08-31

申请号：US10186885

申请日：2002-06-28

申请人： Koji Hirata ,  Masahiko Yatsu ,  Futoshi Yamasaki

发明人： Koji Hirata ,  Masahiko Yatsu ,  Futoshi Yamasaki

IPC分类号： G03B2114

CPC分类号： G02B27/1026 ,  G02B27/1073 ,  G02B27/149 ,  H04N9/3105

摘要： A projection apparatus includes a polarizing converter which converts a light beam from a light source to a polarized beam; a color separator which separates the polarized beam into color beams based on wavelength; first through third optical path modifiers each of which modifies an optical path associated with a corresponding one of the color beams; first through third polarized light separators, each of which receives a corresponding one of the first through third color beams from the optical path modifiers; first through third reflective image display elements, each of which receives a corresponding one of the first through third color beams from the corresponding polarized light separator and provides a reflected beam to the corresponding polarized light separator; a color combiner which combines the reflected beams from the reflective image display elements of the polarized light separator; and a projection lens which projects a color image.

摘要翻译： 投影装置包括将来自光源的光束转换为偏振光束的偏振转换器; 基于波长将偏振光束分成彩色光束的分色器; 第一至第三光路修改器，每个修改器修改与对应的一个色光束相关联的光路; 第一至第三偏振光分离器，每个偏振光分离器从光路修正器接收第一至第三色光束中相应的一个; 第一至第三反射图像显示元件，每个反射图像显示元件从相应的偏振光分离器接收第一至第三色光束中相应的一个，并将反射光束提供给相应的偏振光分离器; 组合来自偏振光分离器的反射图像显示元件的反射光束的组合器; 以及投影彩色图像的投影透镜。

公开(公告)号：US06396641B2

公开(公告)日：2002-05-28

申请号：US09793561

申请日：2001-02-27

申请人： Koji Hirata ,  Naoyuki Ogura ,  Shigeru Mori ,  Takahiro Yoshida ,  Kazunari Nakagawa

发明人： Koji Hirata ,  Naoyuki Ogura ,  Shigeru Mori ,  Takahiro Yoshida ,  Kazunari Nakagawa

IPC分类号： G02B900

CPC分类号： G02B13/06 ,  H04N5/74

摘要： When a projection lens system used for a rear projection type image display apparatus has a first lens group having an aspherical lens surface, a second lens group, a third lens group sharing almost all the positive refractive power of the overall system, a fourth lens group having an aspherical lens surface, a fifth lens group, and a sixth lens group including a lens having a profile of aspherical surface in which the concave surface thereof faces the screen side and the refractive power in the marginal area is weaker than the refractive power around the optical axis, a projection lens system having a large aperture ratio (low F-number), high focus, wide field angle, and sufficient marginal light amount ratio can be realized at a low cost. When a predetermined opening portion is formed in the projection lens and lens barrel, the lens elements are cooled by air suction and exhaust and the lowering of the lens performance due to temperature change can be prevented. When a flange is arranged in a suitable location of the opening portion, entry of a foreign material from the opening portion and light leakage from the inside are prevented and the contrast performance of the projection type image display apparatus can be prevented from lowering.

摘要翻译： 当用于背投型图像显示装置的投影透镜系统具有具有非球面透镜表面的第一透镜组，第二透镜组，共享整个系统的几乎全部正折射力的第三透镜组时，第四透镜组 具有非球面透镜表面，第五透镜组和第六透镜组，所述第六透镜组包括具有非球面形状的透镜，其中凹面朝向屏幕侧，并且边缘区域中的折光力弱于周围的折光力 可以以低成本实现光轴，具有大开口率（低F值），高焦距，宽视野角和足够的边缘光量比的投影透镜系统。 当在投影透镜和透镜镜筒中形成预定的开口部分时，透镜元件通过吸气和排气被冷却，并且可以防止由于温度变化引起的透镜性能的降低。 当凸缘布置在开口部分的适当位置时，防止异物从开口部分进入并从内部漏光，并且可以防止突起型图像显示装置的对比度性能降低。