专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH10112811A IMAGE DISTORTION CORRECTION AND DEFLECTION DEVICE 失效
公开(公告)号：JPH10112811A
公开(公告)日：1998-04-28
申请号：JP26573696
申请日：1996-10-07
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： TSUKAHARA MASAHISA , WATANABE TOSHIMITSU , KITAMURA MAKOTO , MOCHIZUKI TAKESHI
IPC分类号： H04N3/223 , H04N3/23
摘要： PROBLEM TO BE SOLVED: To correct image distortion which occurs when a white peak pattern is projected on a display device that uses a cathode-ray tube and is asymmetrical to the center line. SOLUTION: When a pattern whose top and bottom are black and whose center is a white peak is projected, anode voltage drops in a part corresponding to the white peak and the horizontal size of the white peak part is expanded. To correct this deficiency, resistance 11 and 12 detect the fluctuation of the anode voltage, and the horizontal size fluctuation of the white peak part is suppressed by returning the anode voltage detection signal to a horizontal size control circuit 15. The anode voltage detection signal is further amplified at a distortion correction current generating circuit 1. Output of the circuit 1 is connected to a horizontal deflection coil 2 and a sigmoid correction capacitor 8 and distortion correction current is injected into the coil 2. For a pattern which has distortion that is asymmetrical to the center line, white peak image has a relatively long cycle in a vertical direction and the cycle of the distortion correction current is also comparatively long. Then, the distortion correction current flows only to the coil 2, and image distortion that is asymmetrical to the center line can be corrected.

2. 发明专利

JPH09182003A IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH09182003A
公开(公告)日：1997-07-11
申请号：JP33696195
申请日：1995-12-25
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： KASAHARA YASUHIRO , MATONO TAKAAKI , SUDO KOICHI , KITAMURA MAKOTO , TOMITA TAKAHIRO , SUGIMOTO KOICHI , MATSUZAWA TOSHIHIKO , AKIYAMA FUMIYOSHI
IPC分类号： H04N5/66 , G09G3/20 , G09G3/36 , G09G5/00 , H04N7/01 , H04N7/12 , H04N9/64
摘要： PROBLEM TO BE SOLVED: To display each of the images from plural different kinds of image sources by the same display means with the same image quality determined by this display means. SOLUTION: A display means 7 is the one with high image quality like the TFT liquid crystal panel corresponding to an XGA, for instance. From an input terminal 1, the television signal of an NTSC system is received and the television signal is converted into the video signal of a VGA signal form in an NTSC-VGA conversion circuit 4. From an input terminal 2, the image information signals of the signal forms such as the VGA, SVGA and XGA, etc., from a personal computer are inputted and the signals are switched to the video signals of the VGA signal form from the NTSC-VGA conversion circuit 11 and are selected. The output signal of a changeover switch 5 is converted into the image signal of the XGA signal form in a VGA-XGA conversion circuit 6 and the signal is supplied to the display means 7. Thus, image displays are performed for all the image signals inputted from input terminals 1 and 2 by the number of picture element (1024×768) corresponding to the XGA in the display means 7.

3. 发明专利

JPH10112812A DISPLAY DEVICE 失效
公开(公告)号：JPH10112812A
公开(公告)日：1998-04-28
申请号：JP26573596
申请日：1996-10-07
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： WATANABE TOSHIMITSU , TSUKAHARA MASAHISA , KITAMURA MAKOTO , MOCHIZUKI TAKESHI
IPC分类号： H04N5/68 , H04N3/26
摘要： PROBLEM TO BE SOLVED: To maintain a best converging state at all times at a low cost by superimposing a fluctuation component of a high voltage onto a focus voltage so as to correct the fluctuation. SOLUTION: An output of a dynamic focus circuit 1 is applied to a DC voltage generating circuit 13 connecting to a focus electrode of a CRT 14 through a coupling capacitor 12. Then a voltage from a high voltage generating circuit 8 connecting to an anode terminal of the CRT 14 is divided by voltage division elements 9, 10 and added to a signal from a vertical parabolic wave generating circuit 5 at an adder circuit 4 through a buffer amplifier 11. Then a clamp circuit 2 clamps a waveform of an amplifier circuit b 6 by using a waveform of an amplifier circuit a 3 that amplifies a waveform of the adder circuit 4.

4. 发明专利

JPH1141534A DIGITAL VIDEO SIGNAL PROCESSING UNIT AND DIGITAL BROADCAST RECEIVER 失效
公开(公告)号：JPH1141534A
公开(公告)日：1999-02-12
申请号：JP18945897
申请日：1997-07-15
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： TSUKAHARA MASAHISA , WATANABE TOSHIMITSU , YOSHIZAWA KAZUHIKO , KITAMURA MAKOTO , SAEKI YUKIMI
IPC分类号： H04N5/44 , H04N5/63 , H04N5/907 , H04N19/00 , H04N19/423 , H04N19/44 , H04N19/65 , H04N19/85 , H04N19/89 , H04N7/24
摘要： PROBLEM TO BE SOLVED: To prevent image format data and user setting data from being lost from an MPEG decoder on the occurrence of a momentary interruption of a power supply. SOLUTION: With a power switch 104 closed, a commercial AC voltage is applied to a rectifier circuit 105 and power is supplied to other circuits through a power transformer 151. A voltage detection circuit 107 detects the presence of the commercial AC voltage at an output terminal of the switch 104. The voltage detection circuit 107 provides an output of a signal L when a threshold voltage is Vth and the commercial AC voltage is lower than the Vth, and provides an output of a signal H when the commercial AC voltage is higher than the Vth. In the case that the case that a plug is withdrawn from a receptacle or the switch 104 is open or the like), the voltage detection circuit 107 provides an output of the signal L. The signal is given to a control circuit 124 provided in an MPEG decoder 140. The control circuit 124 writes image format data and user setting data in a RAM 126 in response to the signal L.

5. 发明专利

JP2009100511A Switching power unit and method of mounting capacitor 审中-公开
标题翻译：开关电源单元和安装电容器的方法
公开(公告)号：JP2009100511A
公开(公告)日：2009-05-07
申请号：JP2007267911
申请日：2007-10-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KANOUDA TAMAHIKO , KITAMURA MAKOTO , SAKURAMORI FUSAO , MOCHIZUKI TAKESHI , SUGAWARA YOSHIHIKO , JORAKU MASAMI
IPC分类号： H02M7/12
摘要： PROBLEM TO BE SOLVED: To provide a switching power unit which can be further made thin, and to provide a method of mounting capacitor.
SOLUTION: In the switching power unit 1, which rectifies a commercial AC voltage and supplies a specified DC voltage, a single high-voltage electrolytic capacitor is constituted of a plurality of segmental high-voltage electrolytic capacitors 14a-14c, each length of which is longer than each diameter thereof; and the individual high-voltage electrolytic capacitors 14a-14c are arranged, being laid down side by side, along a wiring board 9. Furthermore, a plurality of openings 9a-9c are formed in the wiring board 9, and the respective high-voltage electrolytic capacitors 14a-14c are arranged so that parts of them fall in the openings 9a-9c.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种可以进一步制造得更薄的开关电源单元，并提供一种安装电容器的方法。解决方案：在整流商用AC电压并提供规定的直流电压的开关电源单元1中，单个高压电解电容器由多个段式高压电解电容器14a-14c构成，每个长度其长度大于其每个直径; 各个高压电解电容器14a-14c沿着布线板9并排布置。此外，在布线板9中形成有多个开口9a-9c，并且各个高压电解电容器14a-14c被布置成使得它们的一部分落入开口9a-9c中。版权所有（C）2009，JPO＆INPIT

6. 发明专利

JPS63318885A EARTH MAGNETISM CANCELATION CIRCUIT 失效
公开(公告)号：JPS63318885A
公开(公告)日：1988-12-27
申请号：JP15333287
申请日：1987-06-22
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： WATANUKI SEIJI , KUMAZAKI TOSHIHISA , KITAMURA MAKOTO
IPC分类号： H04N9/29
摘要： PURPOSE:To efficiently cancel a beam movement due to earth magnetism by letting a current flow in a cancel coil after a demagnetizing operation is finished. CONSTITUTION:Immediately after a power source switch 2 is turned on, a demagnetizing coil current flows through a positive characteristic thermistor 3. A power source for a small signal circuit, generated by a flyback transformer is given to the collector of a transistor (TR) 23, and a voltage used in a vertical output circuit is integrated by a capacitor 21, and is given to the base of the TR 23 through a Zener diode 22. When the voltage of the capacitor 21 comes higher than a prescribed value, and the Zener diode 22 is turned on, the TR 23 is turned on, as well, and the voltage is impressed to the cancel coil 27.

7. 发明专利

JP2008306779A Switching power supply unit and mounting structure thereof 有权
标题翻译：切换电源单元及其安装结构
公开(公告)号：JP2008306779A
公开(公告)日：2008-12-18
申请号：JP2007148814
申请日：2007-06-05
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KANOUDA TAMAHIKO , KITAMURA MAKOTO , SAKURAMORI FUSAO , MOCHIZUKI TAKESHI , SUGAWARA YOSHIHIKO , YATABE NOBUO
IPC分类号： H02M3/00 , H02M3/28
摘要： PROBLEM TO BE SOLVED: To provide a thin switching power supply unit highly efficiently removing heat generated from a power semiconductor device, and also to provide a mounting structure thereof. SOLUTION: A wiring board 8A is divided into a primary side circuit region 2a, a secondary side circuit region 2b, and a boundary region 2c between them. A primary side heat dissipation plate 6A is disposed on the rear surface of the primary side circuit region 2a, and a secondary side heat dissipation plate 6B is disposed on the rear surface of the secondary side circuit region 2b. The secondary side heat dissipation plate 6B has a bulging portion 6b bulging outward from the external circumference of the wiring board 8A. A gap is provided between the primary side heat dissipation plate 6A and the secondary side heat dissipation plate 6B. Opening portions 9A, 9B, 9C are provided on the wiring board 8A, and heat-generating components such as a diode bridge 10, power MOSFETs 11, 11 and booster diodes 12, 12 and the like, are disposed thereon and bonded to the primary side heat dissipation plates 6A, 6B via a silver paste. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种高效率地去除从功率半导体器件产生的热量的薄型开关电源单元，并且还提供其安装结构。解决方案：布线板8A被分成初级侧电路区域2a，次级侧电路区域2b和它们之间的边界区域2c。初级侧散热板6A设置在初级侧电路区域2a的后表面上，次级侧散热板6B设置在次级侧电路区域2b的后表面上。次级侧散热板6B具有从布线板8A的外周向外凸出的凸出部6b。在一次侧散热板6A和次级侧散热板6B之间设有间隙。开口部分9A，9B，9C设置在布线板8A上，并且诸如二极管桥10，功率MOSFET 11,11和升压二极管12,12等的发热部件被布置在其上并结合到初级侧面散热板6A，6B。版权所有（C）2009，JPO＆INPIT

8. 发明专利

JPH0775121A PROJECTION DISPLAY DEVICE 失效
公开(公告)号：JPH0775121A
公开(公告)日：1995-03-17
申请号：JP14476594
申请日：1994-06-27
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： WATANABE TOSHIMITSU , KITAMURA MAKOTO , TANAKA TAKAMASA
IPC分类号： H01J29/76 , H04N9/28 , H04N9/31
摘要： PURPOSE:To reduce the power burden of a convergence coil or the driving circuit of this coil by providing a linearity control means at one of the polariz ing units of respective projecting tubes at three projecting tubes for projecting pictures in three primary colors. CONSTITUTION:Since the inductances of linearity correction coils 10-12 are different when a DC superimposing current is '0', a raster size on the tube surface of the projecting tube is different as well. Then, the raster size is made equal by providing a size coil 18 between a horizontal deflecting coil 8 and a linearity correcting coil 11 at a projecting tube 106. Then, a deflecting coil 109 arranged at the center is set to L1>L2 larger than other deflecting coils 108 and 110. Therefore, the electric correction amount of convergence coils 111-113, namely, the power of vertical convergence in red, green and blue can be decreased. Since the horizontal size is enlarged even when the vertical size can be optimized at that time, the coil 18 is provided for reducing the horizontal size.

9. 发明专利

JPH05344376A 失效
公开(公告)号：JPH05344376A
公开(公告)日：1993-12-24
申请号：JP14539392
申请日：1992-06-05
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： TANAKA TAKAMASA , ITSUKIDA KENICHI , WATANABE TOSHIMITSU , TAKAGI EIJI , KITAMURA MAKOTO
IPC分类号： H04N3/185 , H04N3/26
摘要： PURPOSE:To decrease the focus tracking error brought about by high-voltage fluctuation by applying focus voltage which follows up the high-voltage fluctuation by superimposing a correction signal. CONSTITUTION:If a high voltage changes by the rapid fluctuation of the high- voltage load in an anode electrode 4 of a cathode-ray tube 3, the ripple component in proportion with the high-voltage fluctuation amount is detected by the bleeder resistance of FBT1, which is amplified by a correction circuit 6 and supplied to a focus voltage supply adjustment circuit through a capacitor C2, then superimposed to the focus voltage and applied to a focus electrode 5. Thus, the phase delay of the focus voltage tracking is compensated according to the high-voltage fluctuation and the tracking error can be reduced.

10. 发明专利

JP2009027895A Switching power supply 审中-公开
标题翻译：切换电源
公开(公告)号：JP2009027895A
公开(公告)日：2009-02-05
申请号：JP2007191537
申请日：2007-07-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KANOUDA TAMAHIKO , KITAMURA MAKOTO , SAKURAMORI FUSAO , MOCHIZUKI GO
IPC分类号： H02M3/155
CPC分类号： H02M1/4233 , H02M3/1582 , H02M2001/007 , Y02B70/126
摘要： PROBLEM TO BE SOLVED: To solve problems wherein a resistor for inrush prevention and a relay required for switching power supply can not be removed in a conventional technique, and downsizing and thinning of the power supply are impeded owing to low efficiency and high heat generation caused by a high voltage-rising ratio of a PFC converter in AC 100 V, in an H-bridge type voltage rising/falling converter which has an initial charging function of an output smoothing capacitor, and removes the relay and the resistor for inrush prevention. SOLUTION: In the voltage rising/falling switching power supply, the PFC converter is constituted as a current critical mode H-bridge system, and this circuit 37 is constituted to have the initial charging function of the output smoothing capacitor 16. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题为了解决在现有技术中不能消除用于防止浪涌电阻的电阻器和开关电源所需的继电器的问题，并且由于低效率和高的性能而阻碍电源的小型化和减薄在具有输出平滑电容器的初始充电功能的H桥式升压/降压转换器中，在AC100V中的PFC转换器的高的上升比引起的发热，并且将继电器和电阻器浪涌预防。解决方案：在升压/降压开关电源中，PFC转换器构成电流临界模式H桥系统，该电路37构成为具有输出平滑电容器16的初始充电功能。 P>版权所有（C）2009，JPO＆INPIT

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式