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

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 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。

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。

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

IPC分类号： G02B13/16 ,  G02B13/18 ,  G02B27/00 ,  H04N9/31

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。

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

IPC分类号： G03B21/62 ,  H04N5/74 ,  G03B21/60

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

IPC分类号： G02B3/12 ,  G02B13/16 ,  G02B13/18 ,  H04N9/31 ,  H04N5/74

CPC分类号： G02B13/16 ,  G02B13/18 ,  G02B3/12 ,  H04N9/31

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：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

IPC分类号： G02B3/00 ,  G02B3/06 ,  G02B5/02 ,  G03B21/62 ,  G03B21/625 ,  G09F9/00 ,  H04N5/74 ,  H04N9/31

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：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

IPC分类号： G02B13/16 ,  G02B9/34 ,  G02B13/18

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：US5103302A

公开(公告)日：1992-04-07

申请号：US466927

申请日：1990-01-18

申请人： Takahiko Yoshida ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Koji Hirata ,  Tooru Numata ,  Isao Yoshizaki ,  Mitsuo Okimoto

发明人： Takahiko Yoshida ,  Hiroki Yoshikawa ,  Shigeru Mori ,  Koji Hirata ,  Tooru Numata ,  Isao Yoshizaki ,  Mitsuo Okimoto

IPC分类号： H04N9/31

CPC分类号： H04N9/31

摘要： A projection type image display device provided with three projecting lenses projecting light emitted by cathode-ray tubes of different colors, red, green and blue, on a screen while enlarging an image is disclosed, in which clapper plates are disposed preferably in front of the red and the blue image source and the clapper plates have different shapes so as to obtain an image without the fluctuation in the color on the whole surface of the screen, even in the case where the distance from the cathode-ray tubes to the screen is shortened in order to reduce the size of the display device.

摘要翻译： 公开了一种投影型图像显示装置，其具有三个投影透镜，用于在放大图像的同时在屏幕上投射由红色，绿色和蓝色不同颜色的阴极射线管发射的光，其中拍板最好设置在 红色和蓝色图像源和拍板具有不同的形状，以便在屏幕的整个表面上获得没有颜色波动的图像，即使在从阴极射线管到屏幕的距离为 缩短以减小显示装置的尺寸。

公开(公告)号：US5926153A

公开(公告)日：1999-07-20

申请号：US592177

申请日：1996-01-26

申请人： Tetsu Ohishi ,  Takahiko Yoshida ,  Hiroki Yoshikawa ,  Yutaka Matsuda ,  Hideo Tanide ,  Shigeru Mori ,  Atsuo Osawa ,  Koji Hirata

发明人： Tetsu Ohishi ,  Takahiko Yoshida ,  Hiroki Yoshikawa ,  Yutaka Matsuda ,  Hideo Tanide ,  Shigeru Mori ,  Atsuo Osawa ,  Koji Hirata

IPC分类号： G03B21/62 ,  G03B21/10 ,  G09B9/32 ,  H04N5/74 ,  B09G5/00

CPC分类号： G09B9/32

摘要： A multi-display apparatus includes a plurality of rear projection-type display devices each in which projection light from image sources is projected through projection lenses onto a rear projection surface of a rear projection screen to form a picture image on a front viewing surface of the rear projection screen, the plurality of rear projection-type display devices being combined together in contiguous relation to one another to form a large screen. An overall front viewing surface of the large screen is formed into a concave surface curved both in a horizontal visibility angle direction and a vertical visibility angle direction. A light-absorbing portion is formed on the front viewing surface of the rear projection screen, and the light-absorbing portion absorbs projection light which passes through one rear projection screen, and is incident as external light on another rear projection screen, thereby preventing a picture image from being degraded.

摘要翻译： 多显示装置包括多个后投影式显示装置，每个背投影型显示装置，其中来自图像源的投影光通过投影透镜投射到背投屏幕的后投影表面上，以在前投影屏幕的前视面上形成图像 背投影屏幕，多个后投影式显示装置彼此连续地组合在一起形成大屏幕。 大屏幕的整体前视面形成为在水平可视角度方向和垂直视角方向上均弯曲的凹面。 在后投影屏幕的前视面形成有吸光部，吸光部吸收通过一个背面投影用屏幕的投影光，作为外部光入射到另一个后投影屏上，从而防止 图片图像降级。

公开(公告)号：US5590943A

公开(公告)日：1997-01-07

申请号：US77780

申请日：1993-06-18

申请人： Takahiko Yoshida ,  Koji Hirata ,  Atsuo Osawa ,  Kiyoshi Wada ,  Hiroki Yoshikawa

发明人： Takahiko Yoshida ,  Koji Hirata ,  Atsuo Osawa ,  Kiyoshi Wada ,  Hiroki Yoshikawa

IPC分类号： G09G3/18 ,  G03B21/28 ,  G03B21/62 ,  G03B21/625 ,  H04N5/74

CPC分类号： G03B21/28 ,  G03B21/625

摘要： A transmission screen for a rear projection type image display apparatus having at least one image generation source for displaying images, at least one projection lens for enlarging and projecting images displayed on the at least one image generation source onto a rear portion of the transmission screen for display. The transmission screen of the image display apparatus enables display of the images projected onto the transmission screen with a contrast of at least 70. Further, the transmission screen enables display with a field angle within a range of at least 72.degree. to less than 100.degree.. The transmission screen also includes a glossy light absorbing layer and a substantially smooth mirror surface at a light exit surface thereof.