Patents by Inventor Hiroshi Shimamori

Hiroshi Shimamori has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10871812
    Abstract: A power supply circuit includes a first power supply line that couples a first input node from which first input power is input and an output node to each other, a second power supply line that couples a second input node from which second input power is input and the output node to each other, a power limit of the second input power being higher than that of the first input power, a converter that is inserted in the first power supply line and that converts a voltage of the first input power input from the first input node to a higher voltage or a lower voltage, an adjustment circuit that adjusts an output voltage of the converter to a voltage higher than a voltage of the second input power input from the second input node.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: December 22, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Hiroshi Shimamori, Kazuya Okamoto
  • Publication number: 20190369687
    Abstract: A power supply circuit includes a first power supply line that couples a first input node from which first input power is input and an output node to each other, a second power supply line that couples a second input node from which second input power is input and the output node to each other, a power limit of the second input power being higher than that of the first input power, a converter that is inserted in the first power supply line and that converts a voltage of the first input power input from the first input node to a higher voltage or a lower voltage, an adjustment circuit that adjusts an output voltage of the converter to a voltage higher than a voltage of the second input power input from the second input node.
    Type: Application
    Filed: April 26, 2019
    Publication date: December 5, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Hiroshi Shimamori, Kazuya Okamoto
  • Patent number: 9641062
    Abstract: A switching power supply includes: a resonant circuit; a switching circuit including a switching element and configured to supply a voltage to the resonant circuit; a smoothing circuit configured to smooth a voltage output from the resonant circuit and outputs an output voltage; a resonance controller configured to, when a control instruction signal is input, cause the switching element to be turned on and off at a first frequency in such a manner that the output voltage becomes a specific voltage; and a controller configured to discontinuously output the control instruction signal to the resonance controller at a second frequency after an operation instruction signal is input until the output voltage becomes higher than a threshold voltage, and continuously output the control instruction signal to the resonance controller after the output voltage becomes higher than the threshold voltage until the operation instruction signal is not input.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: May 2, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Koichi Onodera, Hiroshi Shimamori
  • Publication number: 20160241144
    Abstract: A switching power supply includes: a resonant circuit; a switching circuit including a switching element and configured to supply a voltage to the resonant circuit; a smoothing circuit configured to smooth a voltage output from the resonant circuit and outputs an output voltage; a resonance controller configured to, when a control instruction signal is input, cause the switching element to be turned on and off at a first frequency in such a manner that the output voltage becomes a specific voltage; and a controller configured to discontinuously output the control instruction signal to the resonance controller at a second frequency after an operation instruction signal is input until the output voltage becomes higher than a threshold voltage, and continuously output the control instruction signal to the resonance controller after the output voltage becomes higher than the threshold voltage until the operation instruction signal is not input.
    Type: Application
    Filed: December 21, 2015
    Publication date: August 18, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Koichi Onodera, Hiroshi Shimamori
  • Publication number: 20150180329
    Abstract: An AC/DC converter includes: a rectifier circuit that rectifies an alternating current input; a PFC circuit that has an inductance element, a switching element, and a diode and steps up and outputs an output of the rectifier circuit; a DC/DC converting circuit that converts an output of the PFC circuit into a direct current voltage power source of a predetermined voltage value; a target voltage command generating circuit that designates the target voltage so that the target voltage is low in a region; a target voltage converting circuit that generates a converted target voltage by converting the target voltage designated by the target voltage command generating circuit so that the target voltage is changed in a first period; and a voltage command generating circuit that generates an on and off control signal for controlling on and off of the switching element of the PFC circuit.
    Type: Application
    Filed: December 9, 2014
    Publication date: June 25, 2015
    Inventors: Yukio YOSHINO, Hiroshi SHIMAMORI
  • Publication number: 20150127958
    Abstract: An information processing apparatus includes: a processor; a plurality of power controllers, each of the power controllers includes: an electricity supply that supplies electricity supplied from an inserted power supply cable to the processor, and a detector that detects and notifies a half-disconnected state of the power supply cable; and a current controller that in response to a notification from any of the detectors, decreases output current from the electricity supply in a power controller which falls under the half-disconnected state, and increases output current from an electricity supply in another power controller.
    Type: Application
    Filed: October 27, 2014
    Publication date: May 7, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Yukio YOSHINO, Hiroshi SHIMAMORI
  • Publication number: 20150103565
    Abstract: A direct current to direct current converter includes: a transformer configured to vary a direct-current voltage applied to a first side and output the varied direct-current voltage to a second side; a switch configured to periodically switch the voltage applied to the first side of the transformer; a load-current detecting circuit configured to detect load current flowing in the second side of the transformer; and a switching-frequency switching circuit configured to switch, when a magnitude of the load current detected by the load-current detecting circuit is smaller than a predetermined threshold, a frequency for switching the switch from a first frequency to a second frequency lower than the first frequency, and to switch, when the magnitude of the load current detected by the load-current detecting circuit is larger than the predetermined threshold, the frequency for switching the switch from the second frequency to the first frequency.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 16, 2015
    Inventors: HIROSHI SHIMAMORI, Yukio Yoshino
  • Patent number: 8488332
    Abstract: A function expansion device is electrically connected to an electronic apparatus by being inserted in a socket included in the electronic apparatus and expands a function of the electronic apparatus. The function expansion device includes a substrate on which a component is mounted, a first connecting terminal that is formed at an end portion of the substrate and is electrically connected to a first signal line that connects the electronic apparatus and the component in a one-to-one fashion, a second connecting terminal that is formed at the end portion of the substrate and is electrically connected to a second signal line that connects the electronic apparatus and the component redundantly, and a protection member that is formed to cover only the second connecting terminal.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: July 16, 2013
    Assignee: Fujitsu Limited
    Inventors: Susumu Eguchi, Hiroshi Shimamori, Yusaku Fujiishi
  • Patent number: 8347494
    Abstract: A mounting method for mounting an electronic component on a printed circuit board, the mounting method includes fixing a lower surface of a magnet panel to a magnetic body included in the electronic component by a magnetic force, seizing the electronic component by attracting a part of an upper surface of the magnet panel to an attaching unit, determining a position of the attracting unit to place the electronic component at a predetermined position with respect to the printed circuit board and releasing the attracting unit from the upper surface of the magnet panel.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: January 8, 2013
    Assignee: Fujitsu Limited
    Inventors: Yusaku Fujiishi, Hiroshi Shimamori
  • Patent number: 7724552
    Abstract: A power supply to be connected in parallel to one or more other power supplies so as to share with the other power supplies in supplying load current to a load is disclosed. The power supply includes a load current comparison part including a first input terminal and a second input terminal and outputting a difference in level between a first signal applied to the first input terminal and a second signal applied to the second input terminal. The load current comparison part includes a differential amplifier. A first input terminal of the differential amplifier is connected to a first input terminal of the differential amplifier of each of the other power supplies. A signal indicating a load current supplied by the power supply is input to a second input terminal of the differential amplifier. A non-directional impedance element is inserted between the first and second input terminals of the differential amplifier.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: May 25, 2010
    Assignees: Fujitsu Limited, Fujitsu Access Limited
    Inventors: Kazuhiko Itakura, Hiroshi Shimamori, Isamu Aoki
  • Publication number: 20100084164
    Abstract: A mounting method for mounting an electronic component on a printed circuit board, the mounting method includes fixing a lower surface of a magnet panel to a magnetic body included in the electronic component by a magnetic force, seizing the electronic component by attracting a part of an upper surface of the magnet panel to an attaching unit, determining a position of the attracting unit to place the electronic component at a predetermined position with respect to the printed circuit board and releasing the attracting unit from the upper surface of the magnet panel.
    Type: Application
    Filed: September 30, 2009
    Publication date: April 8, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Yusaku Fujiishi, Hiroshi Shimamori
  • Publication number: 20100079969
    Abstract: A function expansion device is electrically connected to an electronic apparatus by being inserted in a socket included in the electronic apparatus and expands a function of the electronic apparatus. The function expansion device includes a substrate on which a component is mounted, a first connecting terminal that is formed at an end portion of the substrate and is electrically connected to a first signal line that connects the electronic apparatus and the component in a one-to-one fashion, a second connecting terminal that is formed at the end portion of the substrate and is electrically connected to a second signal line that connects the electronic apparatus and the component redundantly, and a protection member that is formed to cover only the second connecting terminal.
    Type: Application
    Filed: September 25, 2009
    Publication date: April 1, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Susumu Eguchi, Hiroshi Shimamori, Yusaku Fujiishi
  • Patent number: 7132921
    Abstract: To reduce pattern resistance including a secondary winding in a power supply module having a pair of secondary windings transformer-coupled with a primary winding. The pair of secondary windings coupled with a primary winding through a transformer is drawn out in both directions each other, and further disposed on different layers. Also, output pattern films are disposed on both sides of the second and third layers, so that pattern films of wide shape can be produced.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: November 7, 2006
    Assignee: Fujitsu Limited
    Inventors: Susumu Eguchi, Hiroshi Shimamori, Kazuhiko Itakura
  • Publication number: 20060209580
    Abstract: A power supply to be connected in parallel to one or more other power supplies so as to share with the other power supplies in supplying load current to a load is disclosed. The power supply includes a load current comparison part including a first input terminal and a second input terminal and outputting a difference in level between a first signal applied to the first input terminal and a second signal applied to the second input terminal. The load current comparison part includes a differential amplifier. A first input terminal of the differential amplifier is connected to a first input terminal of the differential amplifier of each of the other power supplies. A signal indicating a load current supplied by the power supply is input to a second input terminal of the differential amplifier. A non-directional impedance element is inserted between the first and second input terminals of the differential amplifier.
    Type: Application
    Filed: August 15, 2005
    Publication date: September 21, 2006
    Applicants: FUJITSU LIMITED, FUJITSU ACCESS LIMITED
    Inventors: Kazuhiko Itakura, Hiroshi Shimamori, Isamu Aoki
  • Patent number: 6911808
    Abstract: A reference voltage register stores a reference value Vref indicating the output voltage Vout of a power supply circuit. A digital filter amplifies the difference between the output voltage Vout from the power supply circuit and the reference value Vref stored in the reference voltage register. A pulse width computation unit computes the duty such that the output voltage Vout matches the reference value Vref, and generates the on-time of a pulse signal corresponding to the duty. A reference value operation unit updates the reference voltage register depending on the output current from the power supply circuit or the temperature around the power supply circuit.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: June 28, 2005
    Assignee: Fujitsu Limited
    Inventor: Hiroshi Shimamori
  • Patent number: 6855891
    Abstract: A card edge connector comprises a connector body and a conductive pad, and is constructed such that the conductive pad terminates at a predetermined distance from the end of the tip portion of the connector body, and that there is further provided a protective pad, adjacent to the terminating portion of the conductive pad, which is formed at the same time with the formation of a wiring pattern in a post-fabrication step of the wiring pattern. Using the card edge connector, an electric card and an electric equipment are also provided.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: February 15, 2005
    Assignee: Fujitsu Limited
    Inventors: Susumu Eguchi, Hiroshi Shimamori
  • Publication number: 20040189434
    Abstract: To reduce pattern resistance including a secondary winding in a power supply module having a pair of secondary windings transformer-coupled with a primary winding. The pair of secondary windings coupled with a primary winding through a transformer is drawn out in both directions each other, and further disposed on different layers. Also, output pattern films are disposed on both sides of the second and third layers, so that pattern films of wide shape can be produced.
    Type: Application
    Filed: February 9, 2004
    Publication date: September 30, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Susumu Eguchi, Hiroshi Shimamori, Kazuhiko Itakura
  • Patent number: 6778417
    Abstract: This electric-power supplying device comprises switching elements, rectifying elements, and a control circuit. The switching elements are switched according to a switching pulse so as to perform a rectification. The rectifying elements are connected in parallel with the switching elements so as to perform a rectification. The control circuit alters the switching pulse gradually upon switching between the rectification performed by the switching elements and the rectification performed by the rectifying elements.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: August 17, 2004
    Assignees: Fujitsu Limited, Fujitsu Denso Ltd.
    Inventors: Kazuhiko Itakura, Hiroshi Shimamori, Kazutoshi Fuchigami, Tsunehiro Ohno
  • Publication number: 20030079907
    Abstract: A card edge connector comprises a connector body and a conductive pad, and is constructed such that the conductive pad terminates at a predetermined distance from the end of the tip portion of the connector body, and that there is further provided a protective pad, adjacent to the terminating portion of the conductive pad, which is formed at the same time with the formation of a wiring pattern in a post-fabrication step of the wiring pattern. Using the card edge connector, an electric card and an electric equipment are also provided.
    Type: Application
    Filed: March 28, 2002
    Publication date: May 1, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Susumu Eguchi, Hiroshi Shimamori
  • Publication number: 20030081433
    Abstract: This electric-power supplying device comprises switching elements, rectifying elements, and a control circuit. The switching elements are switched according to a switching pulse so as to perform a rectification. The rectifying elements are connected in parallel with the switching elements so as to perform a rectification. The control circuit alters the switching pulse gradually upon switching between the rectification performed by the switching elements and the rectification performed by the rectifying elements.
    Type: Application
    Filed: March 29, 2002
    Publication date: May 1, 2003
    Inventors: Kazuhiko Itakura, Hiroshi Shimamori, Kazutoshi Fuchigami, Tsunehiro Ohino