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1. 发明专利

JPH07245735A REAR PROJECTION IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH07245735A
公开(公告)日：1995-09-19
申请号：JP377395
申请日：1995-01-13
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： YOSHIKAWA HIROKI , YOSHIDA TAKAHIKO , WADA KIYOSHI , MORI SHIGERU , OSAWA ATSUO , HIRATA KOJI , OISHI SATORU , WATANABE TOSHIMITSU , SUSO HIROSHI , YOKOYAMA YOSHIMASA , TAKAHASHI AKIRA , KOMATSU YASUHIKO , MATSUMURA YOSHINORI , NAKAGAWA KAZUNARI , OZEKI KOUSUKE , FURUI MAKI , KUBO NAOKO , SHIMADA TSUTOMU
IPC分类号： G02B13/18 , G03B21/10 , G03B21/16 , G03B21/28 , G03B21/62 , H04N5/64 , H04N5/74
摘要： PURPOSE:To install a display device while its rear side is closely in contact with a wall face by specifying an aspect ratio of a transmissive screen, a screen size and a depth of a case so as to reduce a space for installation. CONSTITUTION:This device is provided with a rear projection image display device 1 and a transmissive screen 7 being a screen of the rear projection image display device 1. The aspect ratio of the transmissive screen 7 is nearly 16:9 and the screen size is 33 inches or over and 40 inches or below, or the aspect ratio of the transmissive screen 7 is selected to be nearly 4:3 and the screen size is 36 inches or over and 40 inches or below and the depth of the case is selected to be 400mm or below. Moreover, vent holes for heat dissipation provided on the rear of the case of the device are formed to be inside a maximum depth of the case. Furthermore, the heat generating parts of the device are divided into parts cooled by natural convection and parts cooled by forced convection.

2. 发明专利

JP2012245016A Magnetic resonance imaging apparatus 审中-公开
标题翻译：磁共振成像装置
公开(公告)号：JP2012245016A
公开(公告)日：2012-12-13
申请号：JP2009193782
申请日：2009-08-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , BITO YOSHITAKA , OTAKE YOSUKE , HASHIMOTO YUICHIRO , YAMADA MASUYOSHI , OCHI HISAAKI
IPC分类号： A61B5/055
CPC分类号： A61B5/055 , A61B5/4839 , G01R33/483 , G01R33/50 , G01R33/5617
摘要： PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging (MRI) apparatus having a function of displaying the amount of a chemical substance in a living body.SOLUTION: The MRI apparatus for displaying the amount of the chemical substance in the living body includes: a system for obtaining a magnetic resonance signal of the chemical substance included in living tissue; a system for acquiring chemical substance information using the system; a system for acquiring a quantitative value of the amount of the chemical substance included in an extracted living tissue; and a system for storing the chemical substance information and the quantitative value of the amount of the chemical substance, which are associated with each other, in a storage unit, and for computing and displaying a new chemical substance estimation value in a computation unit based on the association between the chemical substance information and the quantitative value of the amount of the chemical substance both stored in the storage unit, when new chemical substance information is obtained.
摘要翻译：要解决的问题：提供具有在生物体中显示化学物质的量的功能的磁共振成像（MRI）装置。解决方案：用于在生物体中显示化学物质的量的MRI装置包括：用于获得包括在生物体组织中的化学物质的磁共振信号的系统; 使用该系统获取化学物质信息的系统; 用于获取提取的生物体组织中包含的化学物质的量的定量值的系统; 以及用于将存储单元中相关联的化学物质信息和化学物质量的定量值的系统存储在存储单元中，并且用于基于计算单元计算和显示计算单元中的新化学物质估计值当获得新的化学物质信息时，化学物质信息与存储在存储单元中的化学物质的量的定量值之间的关联。版权所有（C）2013，JPO＆INPIT

3. 发明专利

JP2012133397A Projection type video display device 审中-公开
标题翻译：投影类型视频显示设备
公开(公告)号：JP2012133397A
公开(公告)日：2012-07-12
申请号：JP2012064688
申请日：2012-03-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TANITSU MASAHIKO , HIRATA KOJI
IPC分类号： G03B21/14 , G02F1/13 , G02F1/13363 , G03B21/00
摘要： PROBLEM TO BE SOLVED: To provide a projection type video display device with which color unevenness does not occur even when video light with a large incident angle onto an image surface is projected on a horizontal surface, by making a polarization state of each color light on the image surface substantially equal by polarization conversion means.SOLUTION: The projection type video display device comprises: a light source unit; an illumination optical system including color separation means; multiple video display elements; a cross prism serving as color synthesis means; and a projection optical system of which a maximum value of an incident angle onto an image surface is equal to or above 55°. The projection type video display device further comprises a structure with which the projection type video display device can be placed vertically to display an image on a horizontal surface. Polarization conversion means is provided between the cross prism and the projection optical system, or in the projection optical system.
摘要翻译：要解决的问题：为了提供一种投影型视频显示装置，即使在图像表面上具有大入射角的视频光投射在水平表面上时也不会发生颜色不均匀，通过使每个图像的偏振状态图像表面上的彩色光基本上等于偏振转换装置。
解决方案：投影型视频显示装置包括：光源单元; 包括颜色分离装置的照明光学系统; 多个视频显示元素; 用作颜色合成装置的十字棱镜; 以及投影光学系统，其中在图像表面上的入射角的最大值等于或大于55°。投影型视频显示装置还包括投影型视频显示装置可垂直放置以在水平表面上显示图像的结构。在棱镜和投影光学系统之间或在投影光学系统中设置极化转换装置。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2012118547A Oblique projection optical system and projection type video display apparatus using the same 审中-公开
标题翻译： OBIQUE投影光学系统和投影类型的视频显示设备
公开(公告)号：JP2012118547A
公开(公告)日：2012-06-21
申请号：JP2012004630
申请日：2012-01-13
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , TANITSU MASAHIKO , OGURA NAOYUKI
IPC分类号： G03B21/14 , B29C33/38 , B29L11/00 , G02B13/04 , G02B13/16
摘要： PROBLEM TO BE SOLVED: To provide a miniaturized compact set free from trapezoidal distortion due to oblique projection and having excellent focus performance, in a projection type video display apparatus including an oblique projection optical system having an ultra-short projection distance, and also capable of achieving configuration equipped with a flat mirror.SOLUTION: A projection type video display apparatus includes an oblique projection optical system constituted of a plurality of lenses. The lens which is arranged at a position closest to a projection screen is arranged at a position where a vertical effective image area through which light flux passes does not include an optical axis shared by the largest number of the lenses among the optical axes of the plurality of the lenses. A flat mirror for returning an optical path is arranged between the lens and the projection screen at a prescribed angle to the optical axis. An enlarged image obtained by the image light flux returned by the flat mirror is formed so as to be obtained in the direction of a video display screen.
摘要翻译：解决的问题：为了提供一种小型化的紧凑型组合，由于倾斜投影而具有梯形失真并且具有优异的聚焦性能，在包括具有超短投影距离的倾斜投影光学系统的投影型视频显示装置中，以及也能够实现配备有平面镜的配置。
解决方案：投影型视频显示装置包括由多个透镜构成的倾斜投影光学系统。布置在最靠近投影屏幕的位置处的透镜被布置在光束通过的垂直有效图像区域不包括多个光轴中的最大数量的透镜共享的光轴的位置的镜头。用于返回光路的平面镜以与光轴成规定角度布置在透镜和投影屏之间。通过由平面镜返回的图像光束获得的放大图像被形成为在视频显示屏的方向上获得。版权所有（C）2012，JPO＆INPIT

5. 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

6. 发明专利

JP2011232763A Projection type video display device 审中-公开
标题翻译：投影类型视频显示设备
公开(公告)号：JP2011232763A
公开(公告)日：2011-11-17
申请号：JP2011119880
申请日：2011-05-30
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： G03B21/14 , G02B13/04 , G02B13/18 , G02B13/24 , G02F1/13 , G03B21/10
摘要： PROBLEM TO BE SOLVED: To provide a rear projection type video display device capable of drastically shortening a projection distance of a projection optical system, reducing a distance from a lower end of a screen to a lower end of a set, and compactifying the set.SOLUTION: In a rear projection type video display device where projection lenses 2, 3 for enlarging and projecting an image displayed on a video display element onto a transmission type screen 6, an optical path return mirror 7 for halfway returning a projection light flux projected from the projection lenses 2, 3, and a driving circuit for displaying a video on the video display element are fixedly stored inside a housing 5, the following conditions are satisfied when 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), and 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): 40
摘要翻译：要解决的问题：为了提供能够大大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，并且压缩集合解决方案：在用于将显示在视频显示元件上的图像放大和投影到透射型屏幕6上的投影透镜2,3的背投型视频显示装置中，用于半路返回投影光的光路返回镜7 从投影透镜2,3投射的光束和用于在视频显示元件上显示视频的驱动电路固定地存储在壳体5内，当透射型屏幕6的对角线尺寸由SS表示时，满足以下条件（英寸），壳体5的深度用D（英寸）表示，并且从透射型屏幕6的下端到壳体5的下端的长度由L（英寸）表示：40

7. 发明专利

JP2011175293A Image display apparatus, and fresnel lens sheet and screen used for the image display apparatus 有权
标题翻译：图像显示装置和用于图像显示装置的FRESNEL镜片和屏幕
公开(公告)号：JP2011175293A
公开(公告)日：2011-09-08
申请号：JP2011114310
申请日：2011-05-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OISHI SATORU , YOSHIKAWA HIROKI , HISADA TAKAKI , TANITSU MASAHIKO , HIRATA KOJI , IMAFUKU DAISUKE
IPC分类号： G03B21/10 , G02B3/08 , G02F1/13 , G03B21/14 , G03B21/62
摘要： PROBLEM TO BE SOLVED: To dissolve the unevenness of the brightness of a projection image in an image display apparatus, obtaining an enlarged projection image by an oblique projection of image light onto a rear-surface projection type screen.
SOLUTION: In the image display apparatus, an image from an image generating source 1 is projected through a projection optical system including a projection lens 2, curved surface reflection mirrors 4 and 5, and a reflection mirror 6, from a rear surface of the rear-surface projection type screen 3, within a housing 7 being narrow in depth thereof, In the image display apparatus, the rear-surface projection type screen includes a Fresnel lens sheet 8, and the prism surfaces of the Fresnel lens constituting the Fresnel lens sheet are formed in an aspheric configuration. Thereby, an exit angle of the light beams from the screen is made to be about 0°, almost all over the surface of the screen. Thereby, it is possible to obtain a projection image, which is uniform in brightness as a whole, and it is possible to thin the image display apparatus.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了将图像显示装置中的投影图像的亮度的不均匀性消除，通过将图像光的倾斜投影获得放大的投影图像到背面投影型屏幕上。解决方案：在图像显示装置中，来自图像生成源1的图像通过包括投影透镜2的投影光学系统，弯曲表面反射镜4和5以及反射镜6从背面投影在背面投影型屏幕3的深度较窄的壳体7内，在图像显示装置中，背面投影型屏幕包括菲涅尔透镜片8，并且菲涅尔透镜的棱镜面构成菲涅尔透镜片形成为非球面形状。因此，来自屏幕的光束的出射角被制成大约0°，几乎遍及屏幕的整个表面。由此，可以获得整体上的亮度均匀的投影图像，并且可以使图像显示装置变薄。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2009216883A Projection type image display apparatus 有权
标题翻译：投影类型图像显示设备
公开(公告)号：JP2009216883A
公开(公告)日：2009-09-24
申请号：JP2008059433
申请日：2008-03-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , TANITSU MASAHIKO
IPC分类号： G03B21/00 , G03B21/14 , H04N5/74
CPC分类号： H04N9/317 , G03B21/147 , G03B21/28
摘要： PROBLEM TO BE SOLVED: To provide a projection type image display apparatus excelling in user-friendliness, whose installation position is easily changed (which is improved in the degree of freedom in terms of installation position) without causing distortion or the like on a projection image. SOLUTION: In the projection type image display apparatus equipped with an enlarging and projecting optical unit which enlarges and projects light from a light source unit to a display part, the enlarging and projecting optical unit is equipped with a projection lens for enlarging and projecting an image of a video display element and a reflection mirror equipped with a reflection surface comprising a free curved surface. The video display element has a display surface larger than the display part when its whole is projected to be displayed on the display part through the enlarging and projecting optical unit, and a video on the display surface of the video display element can move on the display surface of the video display element, so as to selectively project and display a portion fit to the display part when it is projected and displayed on the display part through the enlarging and projecting optical unit. Therefore, the installation position of the projection type image display apparatus is movable relative to the display part. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了提供优异的用户友好性的投影型图像显示装置，其安装位置容易地改变（在安装位置方面提高了自由度），而不会引起变形等投影图像。解决方案：在具有放大投影光学单元的投影型图像显示装置中，放大投影光从光源单元投射到显示部分，放大投影光学单元配备有投影透镜，用于放大和投影视频显示元件的图像和配备有包括自由曲面的反射表面的反射镜。当通过放大和投影光学单元投影显示在显示部分上时，视频显示元件具有大于显示部分的显示表面，并且视频显示元件的显示表面上的视频可以在显示器上移动表面，以便通过放大和投影光学单元在显示部件上投射和显示时，选择性地投影和显示与显示部分相配合的部分。因此，投射型图像显示装置的安装位置相对于显示部分是可移动的。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2009145911A Projection display device and rear-projection display device using the same 有权
标题翻译：投影显示装置和使用其的后投影显示装置
公开(公告)号：JP2009145911A
公开(公告)日：2009-07-02
申请号：JP2009077979
申请日：2009-03-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , TANITSU MASAHIKO
IPC分类号： G03B21/00 , G02B27/28 , G02F1/13 , G02F1/1335
摘要： PROBLEM TO BE SOLVED: To achieve high image quality and high reliability in a projection display device. SOLUTION: In the display device, color purity is improved by cutting a yellow component from red and green ones, and also the balance of light energy of three colors is made well by inserting a reflection attenuation filter which reflects light in a green optical path. Furthermore, an optical phase difference compensating plate is provided in the green optical path so as to improve contrast performance, and simultaneously two optical parts to which ultraviolet reflection coating is applied are arranged in a blue optical path and an ultraviolet absorbing filter is provided on the incident side of a blue liquid crystal panel in order to prolong the life of an image display device. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了在投影显示装置中实现高图像质量和高可靠性。
解决方案：在显示装置中，通过从红色和绿色切割黄色成分来提高色纯度，并且通过插入将光反射成绿色的反射衰减滤光片，可以很好地实现三色光平衡光路。此外，在绿色光路中设置光学相位差补偿板，以提高对比度性能，并且同时将两个施加有紫外线反射涂层的光学部件布置在蓝色光路中，并且紫外线吸收滤光器设置在蓝色液晶面板的入射侧，以延长图像显示装置的使用寿命。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2009083277A Electronic blackboard 有权
标题翻译：电子黑板
公开(公告)号：JP2009083277A
公开(公告)日：2009-04-23
申请号：JP2007255731
申请日：2007-09-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRATA KOJI , TANITSU MASAHIKO , IKEDA HIDEHIRO
IPC分类号： B43L1/04 , H04N1/00
摘要： PROBLEM TO BE SOLVED: To provide an electronic blackboard which does not require a wide space by integrating the electronic blackboard and a projector.
SOLUTION: This electronic blackboard is constituted of a back surface light projecting optical unit which expandedly projects an optical image from the projector by tilting it from a short distance to the back surface of the electronic blackboard by a back surface projection optical system. In addition, a camera is attached to the back surface, and a display article being written on a screen from the back surface of the projector is photographed, and the photographed display article is mixed with the optical image being output from the projector, and is output.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过集成电子黑板和投影仪来提供不需要宽广空间的电子黑板。解决方案：该电子黑板由后表面投光光学单元构成，该背面投光光学单元通过背面投影光学系统从电子黑板的短距离倾斜到电子黑板的后表面而使投影仪的光学图像发生膨胀。此外，将相机附接到背面，并且从投影仪的背面被写入屏幕上的显示物品被拍摄，并且将拍摄的显示品与从投影仪输出的光学图像混合，并且输出。版权所有（C）2009，JPO＆INPIT

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