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1. 发明专利

GB2420868A Compact rear projection type image display device 未知
公开(公告)号：GB2420868A
公开(公告)日：2006-06-07
申请号：GB0523444
申请日：2004-08-18
申请人： HITACHI LTD
发明人： HIRATA KOJI , KATO SHUJI , IKEDA HIDEHIRO , YAMAMOTO MASAHIRO
IPC分类号： G02B13/16 , G03B21/14 , G02B13/18 , G02B27/18 , G03B21/00 , G03B21/10
摘要： The present invention relates to a compact rear projection type image display device comprising a projection optical unit 4, the projection optical unit including a white light source, a light beam splitting portion, an image display element, a light beam synthesizing portion and a projection lens, a drive circuit in a chassis 8 for driving the image display element, a turn-back mirror 7 for reflecting the light beam projected from the projection lens and directing the light beam to a screen 6, a housing 5 for housing therein the projection optical unit, the drive circuit and the turn-back mirror, wherein when looking at a central portion of the screen, the drive circuit is disposed on one of the right and left sides in the interior of the housing and the projection optical unit is disposed on the other.

2. 发明专利

GB2420868B Rear projection type image display device with compact depth 未知
公开(公告)号：GB2420868B
公开(公告)日：2006-10-25
申请号：GB0523444
申请日：2004-08-18
申请人： HITACHI LTD
发明人： HIRATA KOJI , KATO SHUJI , IKEDA HIDEHIRO , YAMAMOTO MASAHIRO
IPC分类号： G02B13/16 , G03B21/10 , G02B13/18 , G03B21/00 , G03B21/14
摘要： The present invention relates to a rear projection type image display device comprising projection lenses ( 2, 3 ) for projecting an image displayed on an image display element onto a transmission type screen ( 6 ) on a larger scale, an optical path turn-back mirror ( 7 ) for turning back halfway a light beam projected from the projection lenses, and a drive circuit for displaying an image on the image display element, that are fixedly housed within a housing ( 5 ). When a diagonal size of the transmission type screen ( 6 ), the depth of the housing ( 5 ), and the length from a lower end of the screen ( 6 ) to a lower end of the housing ( 5 ), are assumed to be SS (inch), D (inch), and L (inch), respectively, the following conditions are satisfied: SS>40, D

3. 发明专利

GB2408590B Rear projection type image display device 未知
公开(公告)号：GB2408590B
公开(公告)日：2006-11-22
申请号：GB0418476
申请日：2004-08-18
申请人： HITACHI LTD
发明人： HIRATA KOJI , KATO SHUJI , IKEDA HIDEHIRO , YAMAMOTO MASAHIRO
IPC分类号： G02B13/16 , G03B21/10 , G02B13/18 , G02B27/18 , G03B21/00 , G03B21/14
摘要： The present invention relates to a rear projection type image display device comprising projection lenses ( 2, 3 ) for projecting an image displayed on an image display element onto a transmission type screen ( 6 ) on a larger scale, an optical path turn-back mirror ( 7 ) for turning back halfway a light beam projected from the projection lenses, and a drive circuit for displaying an image on the image display element, that are fixedly housed within a housing ( 5 ). When a diagonal size of the transmission type screen ( 6 ), the depth of the housing ( 5 ), and the length from a lower end of the screen ( 6 ) to a lower end of the housing ( 5 ), are assumed to be SS (inch), D (inch), and L (inch), respectively, the following conditions are satisfied: SS>40, D

4. 发明专利

GB2408590A Rear projection type image display device 未知
公开(公告)号：GB2408590A
公开(公告)日：2005-06-01
申请号：GB0418476
申请日：2004-08-18
申请人： HITACHI LTD
发明人： HIRATA KOJI , KATO SHUJI , IKEDA HIDEHIRO , YAMAMOTO MASAHIRO
IPC分类号： G02B13/16 , G02B13/18 , G03B21/00 , G03B21/10 , G03B21/14 , G02B27/18
摘要： The present invention relates to a rear projection type image display device comprising projection lenses 2, 3 for projecting an image displayed on an image display element onto a transmission type screen 6 on a larger scale, an optical path turn-back minor 7 for turning back halfway a light beam projected from the projection lenses, and a drive circuit for displaying an image on the image display element, that are fixedly housed within a housing 5. When a diagonal size of the transmission type screen 6, the depth of the housing 5, and the length from a lower end of the screen 6 to a lower end of the housing 5, are assumed to be SS, D, and L, respectively, the following conditions are satisfied: SS > 40 inch (101,6 cm), D & SS/3.0, and L & SS/10.9.

5. 发明专利

JP2009003450A Rear projection type video display apparatus 有权
标题翻译：后投影类型视频显示设备
公开(公告)号：JP2009003450A
公开(公告)日：2009-01-08
申请号：JP2008154808
申请日：2008-06-13
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , KATO SHUJI , IKEDA HIDEHIRO , YAMAMOTO MASAHIRO
IPC分类号： G03B21/10 , G02B13/16 , G02B13/22 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To provide a rear projection type video display apparatus capable of drastically shortening a projection distance of a projection optical system, reducing a distance from the lower end of a screen to the lower end of the set, and making the set compact.
SOLUTION: The rear projection type video display apparatus has a housing 5 wherein a projection lens for enlarging and projecting an image displayed in a video display device onto a transmission type screen 6, an optical path return mirror for halfway returning the projection light flux projected from the projection lens, and a driving circuit for displaying the video in the video display device are fixedly stored. Provided that the diagonal dimension of the transmission type screen 6 is expressed by SS (inch), the depth of the housing 5 is expressed by D(inch), the length from the lower end of the transmission type screen 6 to the lower end of the housing 5 is expressed by L (inch), the rear projection type image display apparatus satisfies conditions: 40
摘要翻译：要解决的问题：为了提供能够显着缩短投影光学系统的投影距离的背投式视频显示装置，减少从屏幕的下端到集合的下端的距离，并且使集紧凑。解决方案：背投型视频显示装置具有壳体5，其中用于将显示在视频显示装置中的图像放大和投影到透射型屏幕6上的投影透镜，用于半路返回投影光的光路返回镜固定地存储从投影透镜投影的光束和用于在视频显示装置中显示视频的驱动电路。假设透射型屏幕6的对角尺寸用SS（英寸）表示，壳体5的深度由D（英寸）表示，从透射型屏幕6的下端到下端的长度壳体5由L（英寸）表示，后投影型图像显示装置满足条件：40

6. 发明专利

JPH01158387A LEAD DRAWING PORT OF NUCLEAR FUSION DEVICE 失效
公开(公告)号：JPH01158387A
公开(公告)日：1989-06-21
申请号：JP31628887
申请日：1987-12-16
申请人： HITACHI LTD , JAPAN ATOMIC ENERGY RES INST
发明人： NIWA TAKAHIKO , AKINO NOBORU , OGIWARA TOKUO , HOSOGANE NOBUYUKI , YAMAMOTO MASAHIRO
IPC分类号： G21B1/05 , G21B1/00
摘要： PURPOSE:To obtain a high reliable lead drawing port in which electromagnetic force does not act even if one-turn current flows by providing vibration proof support fittings insulated so that a constant interval is set between a lead support rod and a port. CONSTITUTION:A plurality of vibration proof support fittings 15 are provided at proper intervals halfway on a lead support rod 10 set in the center part of a measuring instrument lead drawing port 3, and a measuring element lead 8 and a lead support rod 10 is supported in a measuring instrument lead drawing port 3. The support fittings 15 is such that a plurality of insulators 16 such as rubber are laminated and held by a clamp 17. Contact with the insulators 16 and the drawing port 3 is increased and contact possibility of the support rod 10 and the drawing port 3 is decreased by laminating a plurality of the insulators 16. A one turn circuit is not electrically formed due to insulation even if the support rod 10 comes in contact with the inner wall of the drawing port 3 for some reason.

7. 发明专利

JPH01147395A NUCLEAR FUSION DEVICE 失效
公开(公告)号：JPH01147395A
公开(公告)日：1989-06-09
申请号：JP30565087
申请日：1987-12-04
申请人： HITACHI LTD , JAPAN ATOMIC ENERGY RES INST
发明人： KODA TOMOKAZU , KANAMORI NAOKAZU , NIWA TAKAHIKO , SHIMIZU MASATSUGU , YAMAMOTO MASAHIRO , TAKATSU HIDEYUKI
IPC分类号： G21B1/05 , G21B1/00
摘要： PURPOSE:To improve the reliability on stress by forming the weld zone between a vacuum vessel and port to the size larger than the diameter of the port. CONSTITUTION:A cylindrical seat 1a is formed integrally with the vacuum vessel 1 in the direction perpendicular to the outside in the upper part of the vacuum vessel 1. The wall thickness of the cylindrical seat 1a is equalized to the wall thickness of the port 5 and the inside diameter C thereof is determined larger. The faucet port 9 having the expanded part of the same inside diameter C at the bottom end is welded and fixed in abutment to the top end face of the cylindrical seat 1a. The expanded part is formed to the inside diameter C much larger than the inside diameter B of the base material part of the port. Since the Z part of the weld zone is thereby formed to the size larger than the diameter of the port, the part is provided with the torsional rigidity larger than the torsional rigidity of the base material part and the reliability on stress is improved.

8. 发明专利

JPS57148766A LASER BEAM PRINTER 失效
公开(公告)号：JPS57148766A
公开(公告)日：1982-09-14
申请号：JP3390581
申请日：1981-03-11
申请人： HITACHI LTD
发明人： YAMAMOTO MASAHIRO
IPC分类号： B41J2/44 , B41J29/46 , G03G15/04 , G06K15/12 , H04N1/23 , H04N1/40
摘要： PURPOSE:To realize a highly effective operation of a laser beam printer, by providing a means that decides the output of a laser beam in the levels of two steps and using one of the two steps for detection of the position of the laser beam and using the other step for detection of the reduction of the laser beam volume respectively. CONSTITUTION:The laser beam L which is made incident in a certain cycle is detected by a beam detector 5, and the output of detection is supplied to comparators 8 and 9 respectively. The comparator 8 produces an output to an input signal higher than the comparison potential and sends the output to a BD driver 10 in the form of a detection signal for the position of the beam L. The comparator 9 produces an output to an input signal higher than the comparison potential which is higher than that of the comparator 8 and then sends it to a display 11 in the form of a reduction signal of the laser beam volume. In such a way, the exchange of laser oscillators, the control of an optical system, etc. are made possible before a laser beam printer becomes faulty of ensure a highly efficient operation of the laser printer.

9. 发明专利

JPS578570A PAPER DRYING MACHINE 失效
公开(公告)号：JPS578570A
公开(公告)日：1982-01-16
申请号：JP8145680
申请日：1980-06-18
申请人： HITACHI LTD
发明人： YAMAMOTO MASAHIRO
IPC分类号： G03G15/20
摘要： PURPOSE:To prevent the deviation in paper sequence in spite of a case when wind force is strong by providing the 1st guide which is provided near the position where paper is discharged and guides the paper obliquely downward, and the 2nd guide which guides the paper in a stacker in approximately parallel with the stacker. CONSTITUTION:A guide 31 is located near a discharge port, and its tip is placed higher than the position where paper is discharged and its trailing end in a position lower than this, so that the paper is guided downward. A guide 32 is approximately parallel to the bottom surface of a stacker 35, and presses the top surface of paper. When the paper is discharged from the discharge port, the tip thereof abuts on the guide 31, is conducted downward, is lifted by wind pressure and moves approximately along the guide 32. When the paper fully enters the stacker 35, its trailing end is elongated by the elasticity of the paper itself and is held in a position sufficiently lower than the discharge port; hence, this turns out that the next paper always enters the uppermost part. As a result, the accumulation sequence of the paper does not deviate in spite of a case when wind force is strong.

10. 发明专利

JP2012027478A Projection type video display device 有权
标题翻译：投影类型视频显示设备
公开(公告)号：JP2012027478A
公开(公告)日：2012-02-09
申请号：JP2011185465
申请日：2011-08-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , KATO SHUJI , IKEDA HIDEHIRO , YAMAMOTO MASAHIRO
IPC分类号： G03B21/10 , G02B13/18 , G02B13/24 , G02F1/13 , G02F1/1335 , G03B21/00
摘要： PROBLEM TO BE SOLVED: To substantially shorten a projection distance of a projection optical system, decrease an interval from a screen lower end to a set lower end, and miniaturize a set in a rear projection type video display device.SOLUTION: The rear projection type video display device includes: a housing 5 in which a projection lens for enlarging and projecting an image displayed to a video display device onto a transmission type screen 6, an optical path fold mirror for halfway folding the projection light flux projected from the projection lens, and a driving circuit for displaying the video on the video display device are fixedly stored. Assuming that the diagonal dimension of the transmission type screen 6 is defined as SS (inch), the depth of the housing 5 is defined as D(inch), and the length from the lower end of the transmission type screen 6 to the lower end of the housing 5 is defined as L (inch), the rear projection type video display apparatus satisfies the following conditions, 40
摘要翻译：要解决的问题：为了大大缩短投影光学系统的投影距离，减少从屏幕下端到设定的下端的间隔，并且使后投影型视频显示装置中的集合小型化。解决方案：背投型视频显示装置包括：壳体5，其中将用于将显示给视频显示装置的图像放大和投影到投影型屏幕6上的投影透镜，用于中途折叠的光路折叠镜固定地存储从投影透镜投影的投射光束和用于在视频显示装置上显示视频的驱动电路。假设传输型屏幕6的对角尺寸被定义为SS（英寸），壳体5的深度被定义为D（英寸），并且从透射型屏幕6的下端到下端的长度壳体5被定义为L（英寸），背投影型视频显示装置满足以下条件：40

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