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1. 发明专利

JP2002196302A PROJECTION TYPE DISPLAY DEVICE AND MULTI SCREEN DISPLAY DEVICE 失效
公开(公告)号：JP2002196302A
公开(公告)日：2002-07-12
申请号：JP2000396906
申请日：2000-12-25
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： KANBARA TAKASHI , TANAKA KEIICHIRO , SAKAMOTO SHUICHI , EBIHARA MASAYUKI , NAKAO MITSUYA , ICHIKAWA KIMIFUNE , KOBAYASHI KAZUO , SATO TADASHI
IPC分类号： G02F1/13 , G02B27/00 , G02F1/13357 , G03B21/00 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To lower heat resistant temperature of a luminous flux controlling means which lowers irregularities of brightness and color which are caused by the eclipse at the lens edge of projection lens and to reduce the lowering of contrast due to stray light. SOLUTION: This projection type display device is provided with a light source, a liquid crystal panel, an integrator which uniformly illuminates the liquid crystal panel comprising a first lens array and a second lens array, a projection lens which enlarges and projects a light modulation picture from the liquid crystal panel on a screen and the luminous flux controlling means which controls the luminous flux which is made incident to the integrator from the light source in between the light source and integrator. Therein, the incident luminous flux from the peripheral part of a reflection mirror of the light source among the incident luminous flux from the light source to the integrator is shielded by a luminous flux controlling means.

2. 发明专利

JP2001264878A PROJECTION TYPE DISPLAY DEVICE 失效
公开(公告)号：JP2001264878A
公开(公告)日：2001-09-26
申请号：JP2000077786
申请日：2000-03-15
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： NAKAO MITSUYA , YABE AKIO , SATO TADASHI , TANAKA KEIICHIRO , KANBARA TAKASHI
IPC分类号： G02F1/13 , G02F1/1335 , G02F1/13357 , G03B21/14 , G09F9/00
摘要： PROBLEM TO BE SOLVED: To provide a projection type display element capable of stabilizing the moving action of a light source, small in size and easy in light source exchanging operation. SOLUTION: The moving system of a light source unit is set to a rotationally moving system and the rotational angle thereof is set to about 180 deg. in normal rotation/reverse rotation, respectively. Then, the light source is constituted to move by a rotationally reciprocating (reverse rotation) system, and further a hole for exchanging the light source is bored only on an opposite side to the light emitting position of the light source by about 180 deg., so that the light source is exchanged from this one hole.

3. 发明专利

JP2001109071A PROJECTION TYPE DISPLAY DEVICE 失效
公开(公告)号：JP2001109071A
公开(公告)日：2001-04-20
申请号：JP28914599
申请日：1999-10-12
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： NAKAO MITSUYA , ICHIKAWA KIMIFUNE , SATO TADASHI , TANAKA KEIICHIRO , KANBARA TAKASHI
IPC分类号： H04N5/74 , G03B21/28 , G09F9/00
摘要： PROBLEM TO BE SOLVED: To efficiently correct the distortion of an image reflection mirror installed in a projection type display device. SOLUTION: As for the projection type display device with the mirror for reflecting the image from a projector toward a screen, the device is provided with an adjusting mechanism for changing the flatness of the mirror on the peripheral part of the mirror in accordance with the necessary part unit of the mirror.

4. 发明专利

JP2001125199A PROJECTION TYPE DISPLAY SYSTEM, PROJECTION UNIT USED THEREIN AND LAMP SWITCHING DEVICE FOR PROJECTOR 失效
公开(公告)号：JP2001125199A
公开(公告)日：2001-05-11
申请号：JP30956699
申请日：1999-10-29
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： NAKAO MITSUYA , YABE AKIO , SATO TADASHI , TANAKA KEIICHIRO , KANBARA TAKASHI
IPC分类号： G02F1/13 , G02F1/1333 , G03B21/14
摘要： PROBLEM TO BE SOLVED: To miniaturize a lamp switching device for a projector. SOLUTION: This system is equipped with a moving frame 10 holding two lamps 2a and 2b side by side on a line, a slide guide 6 supporting the frame 10 movably in a direction 2d where the lamps are arranged side by side on a line, a lamp moving motor 9 moving the frame 10, an ammeter 43 detecting the turn-off of the lamp 2a positioned at a projection feasible position, and a lamp switching control unit 41 driving the motor 9 when the turn-off of the lamp 2a is detected by the ammeter 43.

5. 发明专利

JPH11153760A REFLECTING MIRROR ADJUSTING MECHANISM AND PROJECTION TYPE DISPLAY DEVICE USING THE MECHANISM 失效
公开(公告)号：JPH11153760A
公开(公告)日：1999-06-08
申请号：JP10816098
申请日：1998-04-17
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： NAKAO MITSUYA , YAMADA YUICHI , TANAKA KEIICHIRO , ICHIKAWA KIMIFUNE , KANBARA TAKASHI , HOTSUTA DAICHI
IPC分类号： G02B26/08 , G02B7/198 , G03B21/10 , G09F9/00 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To enable a projection type display device to correct the contour distortion of display area of video projected on a screen unit due to the aberration of an optical lens. SOLUTION: Rubber 19 is charged among a frame-form base plate 14 and fastening plates 11, 12, 13 arranged along the base plate, and a projecting mirror 8 is held by the peripheral part inserted in the rubber 19. Moreover, the peripheral part of the base plate 14 is fixed to the reflecting mirror frame at a predetermined interval. By turning push-adjusting volts 15 arranged so that they engage the screw holes in the reflecting mirror frame 5 and their tip parts are abutted on the base plate 14, the base plate 14, etc., are deformed and the reflecting mirror 8 is deformed in a concave form to the reflecting mirror frame 5, and by turning the lead-in adjusting bolts 16 passing through the through-holes in the reflecting mirror frame 5 and engaging the screw holes in the base plate 14, the base plate 14, etc., are deformed and the reflecting mirror 8 is deformed projectingly to the reflecting mirror frame 5.

6. 发明专利

JPH11119341A LIQUID CRYSTAL PROJECTION TYPE DISPLAY DEVICE 失效
公开(公告)号：JPH11119341A
公开(公告)日：1999-04-30
申请号：JP28565997
申请日：1997-10-17
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： KANBARA TAKASHI , IKEDA MIYUKI , ICHIKAWA KIMIFUNE , NAKAO MITSUYA , HOTSUTA DAICHI , YAMADA YUICHI
IPC分类号： G02F1/13 , G03B21/16 , G03B21/28 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To enhance the reliability, availability and maintainability of a display device. SOLUTION: In a cabinet 4, a projection unit 1 is placed and fixed onto the inclined surface of the bottom board 7 of the cabinet 4, and a screen unit is irradited with light passing through a liquid crystal panel 17 and a lens group 16 from a lamp unit 18. The component parts of the lens group 16, the panel 17 and the unit 18 are attachably/detachably attached in the unit 1. By detaching a front panel 5 from the cabinet 4, the component parts are replaced from that part. The unit 1 can be attached in a reverse direction to that shown in figure, and the component parts are replaced from the part by detaching the rear panel 6 of the cabinet 4. Air for cooling is sent to the component parts by an air blower.

7. 发明专利

JP2009139876A Video display device and multiple display device 审中-公开
标题翻译：视频显示设备和多显示设备
公开(公告)号：JP2009139876A
公开(公告)日：2009-06-25
申请号：JP2007319058
申请日：2007-12-11
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ABE FUKUOKU , TANAKA KEIICHIRO , KANBARA TAKASHI , EBIHARA MASAYUKI
IPC分类号： G02F1/13357 , G02B27/28 , G02F1/1335 , G03B21/00
摘要： PROBLEM TO BE SOLVED: To provide a video display device using a large liquid crystal display that performs a reliable large screen display by extending the life of an incidence polarizer and enabling the replacement of a light source. SOLUTION: The video display device includes the light source 1 for emitting light, a polarization conversion element 4 for converting the light emitted from the light source into a predetermined polarization component, an optical shaping part 7 for sharing the polarized light to a predetermined rectangular size, an illumination part 8 for enlargingly projecting the rectangular light, a Fresnel lens 9 for converting the direction of the rectangular light enlargingly projected by the illumination part, a diffusion part 10 for diffusing the outgoing light, and a light modulation part 12 for modulating the light from the diffusion part. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种使用大型液晶显示器的视频显示装置，其通过延长入射偏振器的寿命并且能够更换光源来执行可靠的大屏幕显示。解决方案：视频显示装置包括用于发光的光源1，用于将从光源发射的光转换为预定偏振分量的偏振转换元件4，用于将偏振光共享到光学成形部7 用于放大投影矩形光的照明部分8，用于转换由照明部分放大投射的矩形光的方向的菲涅尔透镜9，用于扩散出射光的漫射部分10以及光调制部分12 用于调制来自扩散部分的光。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JP2005189893A Back projection display 有权
标题翻译：返回投影显示
公开(公告)号：JP2005189893A
公开(公告)日：2005-07-14
申请号：JP2005090461
申请日：2005-03-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OGINO MASANORI , YAMADA TAKEO , IKEDA MIYUKI , SAKAMOTO SHUICHI , ICHIKAWA KIMIFUNE , TAKATSUJI MASAAKI , KURODA SHOJI , KANBARA TAKASHI , TANAKA KEIICHIRO , YOSHIDA TAKAHIKO
IPC分类号： G03B21/62 , G03B21/625
摘要： PROBLEM TO BE SOLVED: To achieve an improvement in a contrast ratio and reduction in speckle disturbance of a light valve type back projection display.
SOLUTION: In the figure, the number 67 stands for a microlenticular lens commonly used for light diffusion in a perpendicular direction and reduction in speckle disturbance, 66 a Fresnel lens, 63 a main lenticular lens, 65 a light diffusion layer, 64 a black stripe layer of 60% area ratio, 69 a light transmission layer, 71 a matte light diffusion element commonly used for reduction in the speckle disturbance and reduction in mirroring disturbance of ambient light. The microlenticular lens 67 and the matte light diffusion element 71 reduces speckle disturbance. The black stripe layer 64 and the matte light diffusion element 71 improves the contrast ratio and reduces the mirroring disturbance of the ambient light.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：实现光阀型背投显示器的对比度的提高和斑点干扰的减少。在图中，数字67表示通常用于垂直方向的光扩散和减少散斑扰动的微关节透镜，66是菲涅耳透镜，63是主柱状透镜，65是光扩散层，64 60％面积比的黑色条纹层，69层透光层，71是通常用于减少斑点干扰和减少环境光的镜像干扰的无光散射元件。微关节透镜67和哑光扩散元件71减少斑点干扰。黑色条纹层64和哑光扩散元件71提高了对比度并且降低了环境光的镜像干扰。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2001209125A PROJECTION TYPE DISPLAY DEVICE 失效
公开(公告)号：JP2001209125A
公开(公告)日：2001-08-03
申请号：JP2000017832
申请日：2000-01-21
申请人： HITACHI LTD
发明人： WASAI KIYOTAKA , TANAKA KEIICHIRO , KANBARA TAKASHI , ICHIKAWA KIMIFUNE , SAKAMOTO SHUICHI , MATSUDA YUTAKA , SHIAKI TAKUYA , OGINO MASANORI
IPC分类号： G03B21/16
摘要： PROBLEM TO BE SOLVED: To improve the heat-radiating effect of a projection unit. SOLUTION: In a projection type display device incorporating the projection unit, a partitioning plate is provided at the inside of a cabinet, and a heat- insulating plate, the assembly of the projection unit, an air hole and an airtight packing are attached at the partitioning plate, and a discharge flow and an intake flow are completely separated, so that a mixed flow and heat transmission to the side of the intake flow are prevented. Also, a speed change fan and a wind velocity sensor are provided at the discharge port of the cabinet, and the speed of revolution of the speed change fan is controlled by a sensor, and the quick clogging of a filter is prevented, so that a flow rate which is equal to or more than about 1.5 times of a required quantity is secured at the inside of the projection unit over a long term.

10. 发明专利

JPH11102021A LAMP INSTALLATION ADJUSTMENT MECHANISM 失效
公开(公告)号：JPH11102021A
公开(公告)日：1999-04-13
申请号：JP26203097
申请日：1997-09-26
申请人： HITACHI LTD
发明人： SAKAMOTO SHUICHI , IKEDA MIYUKI , TANAKA KEIICHIRO , KURODA SHOJI , KANBARA TAKASHI , ICHIKAWA KIMIFUNE , YAMADA YUICHI
IPC分类号： G03B21/14 , G09F9/00
摘要： PROBLEM TO BE SOLVED: To provide a lamp installation adjustment mechanism which has high luminance usable even for an operational projection display device, whose reliability is high, which is easily adjusted and whose cooling effect is large. SOLUTION: The end part of a lamp main body 11 extended perpendicularl stretching to the plan shown in Fig is held by a lamp holder 18, and the end part of a semicylindrical small cylinder 13 is pushed to U-shaped parts at both end parts of the lamp holder 18 by a coil spring 16a and a wire, and a hemispherical reflection mirror 12 is arranged on a side opposed to the small cylinder 13 and is pushed to the end part of the small cylinder 13 by the coil spring and the sire 14b. Then, a lamp mounting bracket 19 is abutted on the end part of the small cylinder 13, and a semicylindrical middle cylinder 20 is abutted on the lamp mounting bracket 19, and they are clamped by the coil spring 16c and the wire 14c, and a semicylindrical VDF 21 is installed at the lamp mounting bracket 19 at the outside of the middle cylinder 20 so as to make it adjustable in terms of a position by an adjusting screw 22. A blower sends air to the paper surface in a perpendicular direction.

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