-
1.发明授权Rear-projection screen and a rear projection image display employing the rear-projection screen 失效后投影屏幕和采用后投影屏幕的背投影像显示器
公开(公告)号：US5513037A
公开(公告)日：1996-04-30
申请号：US336528
申请日：1994-11-09
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
CPC分类号： G03B21/625
摘要： A rear-projection screen for a rear-projection image display comprises 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： 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），或菲涅耳透镜片（2），双凸透镜片（3）和光吸收片 （4）。 菲涅耳透镜片（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。
-
2.发明授权Rear-projection screen and a rear projection image display employing the rear-projection screen 失效后投影屏幕和采用后投影屏幕的背投影像显示器
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
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。
-
公开(公告)号：US5200814A
公开(公告)日：1993-04-06
申请号：US511790
申请日：1990-04-20
申请人： Koji Hirata , Hiroki Yoshikawa , Takahiko Yoshida , Tooru Numata , Masayuki Muranaka , Kiyoshi Wada , Isao Yoshizaki , Shigeru Inaoka
发明人： Koji Hirata , Hiroki Yoshikawa , Takahiko Yoshida , Tooru Numata , Masayuki Muranaka , Kiyoshi Wada , Isao Yoshizaki , Shigeru Inaoka
CPC分类号： H04N9/31 , G02B13/16 , G02B13/18 , G02B27/0025
摘要： Disclosed is a projection lens system for use in an optical system for magnifying and projecting original images displayed on plural image display devices onto a screen through projection lenses provided in corresponding relation to the image display devices, which projection lens system comprises plural lens elements and in which according to colors or degrees of fineness of original images, the number of constituent lenses, or the shape of lens surface, or an effective aperture of at least one constituent lens element surface, or the number of constituent lenses and the shape of lens surface, or the number of constituent lenses and an effective aperture of at least one constituent lens element surface, or the shape of lens surface and an effective aperture of at least one constituent lens element surface, or the number of constituent lenses, the shape of lens surface and an effective aperture of at least one constituent lens element surface, are changed at a time.
摘要翻译： 公开了一种用于光学系统的投影透镜系统，用于通过与图像显示装置相对应地设置的投影透镜将显示在多个图像显示装置上的原始图像放大和投影到屏幕上，该投影透镜系统包括多个透镜元件，并且 其根据原始图像的颜色或程度，构成透镜的数量，或透镜表面的形状，或至少一个构成透镜元件表面的有效孔径，或构成透镜的数量和透镜表面的形状 ，或构成透镜的数量和至少一个构成透镜元件表面的有效孔径，或透镜表面的形状和至少一个构成透镜元件表面的有效孔径，或构成透镜的数量，透镜的形状 表面和至少一个构成透镜元件表面的有效孔径一次改变。
-
4.发明授权
公开(公告)号：US5485308A
公开(公告)日：1996-01-16
申请号：US387354
申请日：1995-02-13
申请人： Koji Hirata , Takahiko Yoshida , Hiroki Yoshikawa , Masayuki Muranaka , Atsuo Osawa , Yutaka Matuda
发明人： Koji Hirata , Takahiko Yoshida , Hiroki Yoshikawa , Masayuki Muranaka , Atsuo Osawa , Yutaka Matuda
CPC分类号： G03B21/625
摘要： A rear-projection screen for a rear-projection image display apparatus comprises a Fresnel lens sheet, a first lenticular lens sheet, and a second lenticular lens sheet or a Fresnel lens sheet, first and second lenticular lens sheets and a light absorbing sheet. A light entrance surface of the first lenticular lens sheet or a light exit surface thereof, or both of these surfaces are formed by contiguously and vertically arranging a plurality of horizontally elongate lenticular lenses. A thickness of the first lenticular lens sheet is selected to be the thinner than thicknesses of the Fresnel lens sheet, the second lenticular lens sheet, and the light absorbing sheet. The entrance surface and the exit surface of the second lenticular lens sheet are formed by contiguously and horizontally arranging a plurality of vertically elongate lenticular lenses. Particles of a light diffusing material are not necessarily dispersed in the base sheet of the second lenticular lens sheet. The rear-projection image display apparatus 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： 背投影像显示装置的背投屏幕包括菲涅尔透镜片，第一双凸透镜片，第二双凸透镜片或菲涅耳透镜片，第一和第二柱状透镜片和光吸收片。 第一双凸透镜片的光入射表面或其光出射表面或这两个表面的两个形状通过连续且垂直地布置多个水平细长的双凸透镜而形成。 第一双凸透镜片的厚度被选择为比菲涅尔透镜片，第二双凸透镜片和光吸收片的厚度薄。 第二双凸透镜片的入射面和出射面通过连续且水平地布置多个垂直细长的双凸透镜形成。 光漫射材料的颗粒不一定分散在第二双凸透镜片的基片中。 设置有该背投屏幕的背投影像显示装置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。
-
公开(公告)号：US5272540A
公开(公告)日：1993-12-21
申请号：US759518
申请日：1991-09-13
申请人： Koji Hirata , Hiroki Yoshikawa , Tooru Numata , Kiyoshi Wada , Masayuki Muranaka , Isao Yoshizaki , Takahiko Yoshida , Shigeru Inaoka
发明人： Koji Hirata , Hiroki Yoshikawa , Tooru Numata , Kiyoshi Wada , Masayuki Muranaka , Isao Yoshizaki , Takahiko Yoshida , Shigeru Inaoka
摘要： In a projection lens device having at least two plastic lenses for magnification-projecting an original image displayed on a display screen onto a screen, one of the two plastic lens is convex at a center thereof toward the screen and concave at a periphery thereof, and the other lens has a weak positive refractive power toward the screen at a center thereof and a stronger positive refractive power at a periphery thereof. A variation of a lens power due to a change of a surrounding environment is cancelled out by the concave shape at the periphery of the one lens and the positive refractive power at the periphery of the other lens.
摘要翻译： 在具有至少两个用于将显示屏上显示的原始图像放大投影到屏幕上的塑料透镜的投影透镜装置中，两个塑料透镜中的一个在其中心处朝向屏幕凸出并在其周边凹陷，并且 另一个透镜在其中心处具有朝向屏幕的弱正的屈光力，并且在其周边具有更强的正折射光焦度。 由于周围环境的变化引起的透镜光焦度的变化通过在一个透镜的周边处的凹形形状和另一个透镜的周边处的正屈光力被抵消。
-
公开(公告)号：US5255122A
公开(公告)日：1993-10-19
申请号：US626554
申请日：1990-12-12
CPC分类号： H01J29/894 , G02B3/12 , G02B27/0018
摘要： A projection lens system for a projection type television having a cathode-ray tube with a panel having a fluorescent inner surface for projecting an image onto a screen. The projection lens system includes a plurality of lens groups, the lens group positioned at a side nearest to the cathode-ray tube including, in successive order from a side toward the screen, a lens having a concave surface on the screenn side a transparent medium, and the cathode-ray tube panel having a fluorescent inner surface, the lens group attenuating at least a part of a wavelength region of the light emitted on the fluorescent surface so as to improve contrast while reducing observance of a ghost image due to multiple reflection without substantial impairment in at least one of brightness and luminance. More particularly, the attenuation is provided by the concave lens having at least one surface dyed in a predetermined color.
摘要翻译： 一种用于投影型电视的投影透镜系统，具有具有面板的阴极射线管，该面板具有用于将图像投影到屏幕上的荧光内表面。 投影透镜系统包括多个透镜组，透镜组位于最靠近阴极射线管的一侧，从侧面朝向屏幕的顺序依次包括在屏幕侧具有凹面的透镜，透明介质 ，并且具有荧光内表面的阴极射线管面板，透镜组衰减在荧光表面上发射的光的波长区域的至少一部分，从而改善对比度，同时减少由于多次反射引起的重影的遵守 在亮度和亮度中的至少一个中没有显着的损害。 更具体地，衰减由具有以预定颜色染色的至少一个表面的凹透镜提供。
-
公开(公告)号：US4948237A
公开(公告)日：1990-08-14
申请号：US188482
申请日：1988-04-29
申请人： Koji Hirata , Kyohei Fukuda , Hiroki Yoshikawa , Shigeru Mori , Masayuki Muranaka , Isao Yoshizaki , Shigeru Inaoka , Hiroshi Jitsukata
发明人： Koji Hirata , Kyohei Fukuda , Hiroki Yoshikawa , Shigeru Mori , Masayuki Muranaka , Isao Yoshizaki , Shigeru Inaoka , Hiroshi Jitsukata
CPC分类号： G02B13/18
摘要： In a projection system wherein an optical system comprising a first lens for correcting a spherical aberration dependent on the aperture length, a second lens for enlargement and a third lens for correcting a field curvature, projects an image reproduced on a CRT having a curved phosphor surface, onto a screen, the third lens is spaced from the CRT so that the region of the phosphor surface which again totally reflects a light which has been totally reflected by a screen-side surface of the third lens is limited to the edge portion of an effective region of the phosphor surface.
摘要翻译： 在一种投影系统中，其中包括用于校正取决于孔径长度的球面像差的第一透镜的光学系统，用于放大的第二透镜和用于校正场曲率的第三透镜，投影在具有弯曲荧光粉表面的CRT上再现的图像 在屏幕上，第三透镜与CRT间隔开，使得再次完全反射已被第三透镜的屏幕侧表面完全反射的光的荧光体表面的区域被限制到第三透镜的边缘部分 荧光粉表面的有效区域。
-
公开(公告)号：US5066099A
公开(公告)日：1991-11-19
申请号：US513854
申请日：1990-04-24
申请人： Takahoko Yoshida , Masayuki Muranaka , Hiroki Yoshikawa , Koji Hirata , Isao Yoshizaki , Masakuni Teratani , Nobuhiro Konuma
发明人： Takahoko Yoshida , Masayuki Muranaka , Hiroki Yoshikawa , Koji Hirata , Isao Yoshizaki , Masakuni Teratani , Nobuhiro Konuma
CPC分类号： G03B21/625
摘要： A rear projection screen for use in a rear projection image display device comprises one or more sheet members through which light is sequentially transmitted from the side of a plane of incidence of the screen, the last sheet member comprising a transparent material as a base thereof, and a light diffusing layer provided on the side of a plane of emergence of the base. A light diffuser having a refractive index different from that of the base may be dispersed in the base so as to contrive a greater viewing angle. Further, a transperent binder for supporting the light diffuser dispersed in the light diffusing layer or the light diffuser itself may be colored in order to obtain a further enhanced contrast.
摘要翻译： 用于后投影图像显示装置的背投屏幕包括一个或多个片状构件，光从屏幕的入射面的一侧依次传输，最后的片构件包括作为其基底的透明材料， 以及设置在基底的出射面的一侧的光漫射层。 具有与基底不同的折射率的光漫射体可以分散在基底中以便产生更大的视角。 此外，为了获得进一步增强的对比度，可以着色用于支撑分散在光漫射层或光扩散器本身中的光漫射体的透射粘合剂。
-
公开(公告)号：US5500747A
公开(公告)日：1996-03-19
申请号：US294509
申请日：1994-08-23
申请人： Hideo Tanide , Masayuki Muranaka , Shigeru Mori , Kiyoshi Wada , Isao Yoshizaki , Naoyuki Ogura
发明人： Hideo Tanide , Masayuki Muranaka , Shigeru Mori , Kiyoshi Wada , Isao Yoshizaki , Naoyuki Ogura
IPC分类号： G02B21/00 , G02F1/13 , G02F1/1335 , H04N5/74
CPC分类号： H04N5/7441
摘要： An ultra-wide angle liquid crystal projector system comprising a light source, a liquid crystal panel, a curved screen, and a projection lens for projecting in accordance with light emitted by the light source an image formed on the liquid crystal panel onto the curved screen. The projection lens has a curvature of field substantially conforming to the shape of the curved screen and an angle of projection of at least 120 degrees. The projection lens is disposed with respect to the curved screen so that a distance from an exit surface of the projection lens to the curved screen is less than 3 meters.
摘要翻译： 一种超广角液晶投影仪系统，包括光源，液晶面板，弯曲屏幕和投影透镜，用于根据由光源发出的光将形成在液晶面板上的图像投影到弯曲屏幕上 。 投影透镜具有基本上符合弯曲屏幕的形状的曲率，并且投影角度至少为120度。 投影透镜相对于弯曲屏幕设置，使得从投影透镜的出射表面到弯曲屏幕的距离小于3米。
-
公开(公告)号：US07653121B2
公开(公告)日：2010-01-26
申请号：US11024368
申请日：2004-12-28
申请人： Masayuki Muranaka , Tadamitsu Hirai , Takashi Sasaki , Masashi Kitada , Hideyuki Araki , Daisaku Yamane
发明人： Masayuki Muranaka , Tadamitsu Hirai , Takashi Sasaki , Masashi Kitada , Hideyuki Araki , Daisaku Yamane
IPC分类号： H04B1/69
CPC分类号： H04L27/08 , H04B1/707 , H04B2201/70702 , H04B2201/70707
摘要： A disclosed power level measuring device includes a power calculator for calculating power values based on correlation values between a received signal and known signals, for each of sampling times within a predetermined period; a time divider for switching connection of input signals, responding to time slots allocated to each of plural cells; an accumulator connected to the time divider, for accumulating the power values; a detector for detecting at least one sampling time whose accumulated value is greater than a threshold; a memory connected to the time divider, for storing the power values; and an outputting unit for outputting a measured power level, based on the stored power value corresponding to the detected sampling time.
摘要翻译： 所公开的功率电平测量装置包括：功率计算器，用于基于在预定周期内的每个采样时间，基于接收信号和已知信号之间的相关值来计算功率值; 用于响应于分配给多个小区中的每一个的时隙来切换输入信号的连接的时分; 连接到时间分配器的累加器，用于累加功率值; 用于检测累积值大于阈值的至少一个采样时间的检测器; 连接到时间分配器的存储器，用于存储功率值; 以及输出单元，用于基于与检测到的采样时间相对应的存储的功率值来输出测量的功率电平。
-
-
-
-
-
-
-
-
-
搜索结果
17 条记录 (耗时 0.028 秒)
