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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.
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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
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。
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3.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。
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4.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。
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5.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。
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公开(公告)号：US5659424A
公开(公告)日：1997-08-19
申请号：US241633
申请日：1994-05-12
申请人： Atsuo Osawa , Hiroki Yoshikawa , Shigeru Mori , Naoyuki Ogura
发明人： Atsuo Osawa , Hiroki Yoshikawa , Shigeru Mori , Naoyuki Ogura
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。
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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
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。
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公开(公告)号：US5933280A
公开(公告)日：1999-08-03
申请号：US844311
申请日：1997-04-10
申请人： Atsuo Osawa , Hiroki Yoshikawa , Shigeru Mori , Naoyuki Ogura
发明人： Atsuo Osawa , Hiroki Yoshikawa , Shigeru Mori , Naoyuki Ogura
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.
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9.再颁专利
公开(公告)号：USRE33784E
公开(公告)日：1991-12-31
申请号：US531084
申请日：1990-05-31
申请人： Atsuo Osawa , Kenji Ogiro , Shouzou Yokoo , Hidekazu Takeda
发明人： Atsuo Osawa , Kenji Ogiro , Shouzou Yokoo , Hidekazu Takeda
IPC分类号： G11B15/22 , G11B15/665
CPC分类号： G11B15/6653 , G11B15/22
摘要： A magnetic recording/reproducing apparatus for recording onto or reproducing from a magnetic tape housed in a cassette by using a rotary magnetic head having a tape withdrawal arrangement for winding a portion of the tape between the two reels in the cassette around the rotary magnetic head by a predetermined angle. A tape drive feed the magnetic tape at a constant speed, with a reel drive being provided for driving either one of the two reels so as to take up the magnetic tape in the reel driven by the reel drive, and with brake arrangement for braking the rotation of the reels. A ring-shaped cam operating member is provided in the outer peripheral surface or the inner peripheral surface thereof with cam surfaces each for effecting the operation of the respective elements in response to the mode of operation of the magnetic recording/reproducing apparatus. The selective operation is specifically determined by the rotational position of the ring-shaped cam operating member, and the rotational position is varied in response to the mode of operation. A detector is provided for detecting the rotational positions in the ring-shaped cam operating member.
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公开(公告)号：US4780783A
公开(公告)日：1988-10-25
申请号：US509048
申请日：1983-06-29
申请人： Atsuo Osawa , Kenji Ogiro , Nobuyuki Kaku , Shinichi Goto
发明人： Atsuo Osawa , Kenji Ogiro , Nobuyuki Kaku , Shinichi Goto
IPC分类号： G11B23/08 , G11B23/04 , G11B23/087
CPC分类号： G11B23/08735 , G11B23/045
摘要： A locking device for a cover of a magnetic tape cartridge for locking a pivotable cover for covering magnetic tape inlet and outlet ports of the magnetic tape cartridge, including a projection formed on an arm for pivotally supporting the pivotable cover which is engageable with an engaging claw section of a locking member which further includes an operation section and a resilient section. The locking member is pivotally supported on a magnetic tape cartridge case and urged by the biasing force of the resilient section to bring the engaging claw section into engagement with the projection. The operation section of the locking member is located in a position in which it is capable of cooperating with an unlocking pin moved from three directions, to thereby give latitude to the process for loading a magnetic tape cartridge on a magnetic recording and reproducing apparatus.
摘要翻译： 一种用于锁定用于覆盖磁带盒的磁带入口和出口的可枢转盖的磁带盒的锁定装置，包括形成在臂上的突起，用于枢转地支撑可枢转的盖，其可与接合爪接合 锁定构件的截面还包括操作部和弹性部。 锁定构件枢转地支撑在磁带盒壳体上并且由弹性部分的偏置力推动，以使接合爪部分与突起接合。 锁定构件的操作部分位于能够与从三个方向移动的解锁销相配合的位置，从而给予将磁带盒装载在磁记录和再现装置上的处理。
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