Patents by Inventor Kiyoto Matsui
Kiyoto Matsui 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).
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Patent number: 11070086Abstract: A power receiving unit includes a secondary resonant coil for receiving electric power from a primary resonant coil using magnetic resonance or electric field resonance, a secondary coil capable of changing a number of turns or a pitch of a winding for receiving the electric power from the secondary resonant coil using electromagnetic induction, a rectification circuit, and a controller. The electric power received by the secondary coil is rectified by the rectification circuit, and transmitted to a DC-DC converter for supplying the electric power to a load circuit. The controller changes the number of turns or the pitch of the winding of the secondary coil such that an input voltage of the DC-DC converter does not exceed an upper limit, based on a magnitude of the electric power received from the primary resonant coil.Type: GrantFiled: February 22, 2018Date of Patent: July 20, 2021Assignee: FUJITSU LIMITEDInventors: Hirotaka Oshima, Kiyoto Matsui
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Patent number: 10454311Abstract: A power transmitting apparatus includes a plurality of primary-side resonant coils disposed along a conveyance path of a plurality of electronic devices and configured to utilize magnetic field resonance to transmit electric power to secondary-side resonant coils of the respective electronic devices conveyed along the conveyance path; and a plurality of phase adjusters connected between an alternating-current source and the respective primary-side resonant coils and configured to respectively adjust phases of the electric power, supplied to the primary-side resonant coils from the alternating-current source, so as to uniform the phases of the electric power, supplied to the primary-side resonant coils from the alternating-current source.Type: GrantFiled: August 15, 2016Date of Patent: October 22, 2019Assignee: FUJITSU LIMITEDInventors: Kiyoto Matsui, Satoshi Shimokawa
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Patent number: 10381859Abstract: A wireless power supply system includes: a power transmitter; and power receivers configured to receive power through magnetic field resonance or electric field resonance. The transmitter groups the receivers into first groups based on degrees of coupling between the transmitter and the respective receivers in an initial state. The transmitter calculates, for the respective first groups, charging times required to charge the receivers, and a first total charging time for the first groups. The transmitter sets degrees of coupling greater than or equal to the degrees of coupling in the initial state, and again groups the receivers into second groups based on the set degrees. The transmitter calculates, for the respective second groups, charging times required to charge the receivers and a second total for the second groups, and starts to transmit the power when the second total time is less than or equal to the first total time.Type: GrantFiled: September 7, 2017Date of Patent: August 13, 2019Assignee: FUJITSU LIMITEDInventors: Kiyoto Matsui, Akiyoshi Uchida
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Patent number: 10276900Abstract: A rechargeable battery includes: a battery body including a cylindrical outer peripheral side surface; and a power receiving coil wound in at most a single layer around the outer peripheral side surface, and electrically connected to the battery body. The power receiving coil is helically wound around the outer peripheral side surface while forming a space from which the outer peripheral side surface is exposed.Type: GrantFiled: October 29, 2015Date of Patent: April 30, 2019Assignee: FUJITSU LIMITEDInventors: Hiroyasu Kawano, Akiyoshi Uchida, Satoshi Shimokawa, Kiyoto Matsui, Kazuyuki Ozaki, Masakazu Taguchi
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Publication number: 20180287427Abstract: A power receiving unit includes a secondary resonant coil for receiving electric power from a primary resonant coil using magnetic resonance or electric field resonance, a secondary coil capable of changing a number of turns or a pitch of a winding for receiving the electric power from the secondary resonant coil using electromagnetic induction, a rectification circuit, and a controller. The electric power received by the secondary coil is rectified by the rectification circuit, and transmitted to a DC-DC converter for supplying the electric power to a load circuit. The controller changes the number of turns or the pitch of the winding of the secondary coil such that an input voltage of the DC-DC converter does not exceed an upper limit, based on a magnitude of the electric power received from the primary resonant coil.Type: ApplicationFiled: February 22, 2018Publication date: October 4, 2018Applicant: FUJITSU LIMITEDInventors: Hirotaka OSHIMA, Kiyoto MATSUI
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Publication number: 20180197678Abstract: A wireless power transfer system includes a plurality of power sources and at least one power receiver, in which power transfer from the power sources to the power receiver is performed in wireless by using magnetic field resonance or electric field resonance. In the system, one of the plurality of power sources is designated as a master power source and the other one or more power sources are designated as slave power sources. In addition, the master power source controls the plurality of power sources and the at least one power receiver to perform the power transfer. This allows the system to perform the power transfer in an optimum state.Type: ApplicationFiled: March 9, 2018Publication date: July 12, 2018Applicant: FUJITSU LIMITEDInventors: Akiyoshi UCHIDA, Kazuyuki OZAKI, Masakazu TAGUCHI, Satoshi SHIMOKAWA, Hiroyasu KAWANO, Kiyoto MATSUI
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Patent number: 9953763Abstract: A wireless power transfer system includes a plurality of power sources and at least one power receiver, in which power transfer from the power sources to the power receiver is performed in wireless by using magnetic field resonance or electric field resonance. In the system, one of the plurality of power sources is designated as a master power source and the other one or more power sources are designated as slave power sources. In addition, the master power source controls the plurality of power sources and the at least one power receiver to perform the power transfer. This allows the system to perform the power transfer in an optimum state.Type: GrantFiled: September 22, 2014Date of Patent: April 24, 2018Assignee: FUJITSU LIMITEDInventors: Akiyoshi Uchida, Kazuyuki Ozaki, Masakazu Taguchi, Satoshi Shimokawa, Hiroyasu Kawano, Kiyoto Matsui
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Publication number: 20170366034Abstract: A wireless power supply system includes: a power transmitter; and power receivers configured to receive power through magnetic field resonance or electric field resonance. The transmitter groups the receivers into first groups based on degrees of coupling between the transmitter and the respective receivers in an initial state. The transmitter calculates, for the respective first groups, charging times required to charge the receivers, and a first total charging time for the first groups. The transmitter sets degrees of coupling greater than or equal to the degrees of coupling in the initial state, and again groups the receivers into second groups based on the set degrees. The transmitter calculates, for the respective second groups, charging times required to charge the receivers and a second total for the second groups, and starts to transmit the power when the second total time is less than or equal to the first total time.Type: ApplicationFiled: September 7, 2017Publication date: December 21, 2017Applicant: FUJITSU LIMITEDInventors: Kiyoto Matsui, Akiyoshi Uchida
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Patent number: 9672979Abstract: A power transmitting apparatus includes a power transmission or reception circuit, a first coil connected to the power transmission or reception circuit through wires, a plurality of resonance coils having respective, different diameters one of which is selectively coupled to the first coil through electromagnetic induction, and a position control apparatus configured to control the positions of the resonance coils, wherein the position control apparatus is configured to selectively align an axial direction of one of the resonance coils with an axial direction of the first coil.Type: GrantFiled: July 28, 2014Date of Patent: June 6, 2017Assignee: FUJITSU LIMITEDInventors: Kiyoto Matsui, Satoshi Shimokawa
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Patent number: 9558884Abstract: A power transmission apparatus includes a cover part attached to one of a power transmitter and an electronic apparatus, the power transmitter including a primary-side coil connected to an alternating-current power supply and a primary-side resonant coil configured to receive power from the primary-side coil by electromagnetic induction, the electronic apparatus including a secondary-side coil; and a secondary-side resonant coil disposed in the cover part, and configured to transmit to the secondary-side coil the power received from the primary-side resonant coil by magnetic field resonance generated between the primary-side resonant coil and the secondary-side resonant coil.Type: GrantFiled: February 18, 2014Date of Patent: January 31, 2017Assignee: FUJITSU LIMITEDInventors: Satoshi Shimokawa, Akiyoshi Uchida, Hiroyasu Kawano, Kiyoto Matsui, Masakazu Taguchi
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Publication number: 20160352154Abstract: A power transmitting apparatus includes a plurality of primary-side resonant coils disposed along a conveyance path of a plurality of electronic devices and configured to utilize magnetic field resonance to transmit electric power to secondary-side resonant coils of the respective electronic devices conveyed along the conveyance path; and a plurality of phase adjusters connected between an alternating-current source and the respective primary-side resonant coils and configured to respectively adjust phases of the electric power, supplied to the primary-side resonant coils from the alternating-current source, so as to uniform the phases of the electric power, supplied to the primary-side resonant coils from the alternating-current source.Type: ApplicationFiled: August 15, 2016Publication date: December 1, 2016Applicant: FUJITSU LIMITEDInventors: Kiyoto Matsui, SATOSHI SHIMOKAWA
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Patent number: 9362985Abstract: A portable apparatus includes a case, a coil situated inside the case, a circuit disposed inside the case to receive power based on a first frequency via the coil and to perform communication based on a second frequency higher than the first frequency, and a magnetic shield having a first portion and a second portion stacked one over another in a direction perpendicular to the coil between the coil and an inside of the case, the second portion being closer to the coil than the first portion, wherein permeability of the first portion is higher than permeability of the second portion situated toward the coil with respect to the first frequency.Type: GrantFiled: May 23, 2013Date of Patent: June 7, 2016Assignee: FUJITSU LIMITEDInventors: Akiyoshi Uchida, Masakazu Taguchi, Satoshi Shimokawa, Kiyoto Matsui, Hiroyasu Kawano
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Patent number: 9350196Abstract: A non-contact charging apparatus configured to, vary the inductance and the capacitance of the matching unit for matching the impedance of the power supply system that supplies alternate current power and the impedance of the power transmitting/receiving system including a power transmitting unit and a power receiving apparatus according to the variable information.Type: GrantFiled: May 22, 2014Date of Patent: May 24, 2016Assignee: FUJITSU LIMITEDInventors: Akiyoshi Uchida, Masakazu Taguchi, Kiyoto Matsui, Hiroyasu Kawano, Satoshi Shimokawa
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Publication number: 20160049698Abstract: A rechargeable battery includes: a battery body including a cylindrical outer peripheral side surface; and a power receiving coil wound in at most a single layer around the outer peripheral side surface, and electrically connected to the battery body. The power receiving coil is helically wound around the outer peripheral side surface while forming a space from which the outer peripheral side surface is exposed.Type: ApplicationFiled: October 29, 2015Publication date: February 18, 2016Applicant: FUJITSU LIMITEDInventors: Hiroyasu KAWANO, Akiyoshi UCHIDA, Satoshi SHIMOKAWA, Kiyoto MATSUI, Kazuyuki OZAKI, Masakazu TAGUCHI
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Patent number: 9130386Abstract: A wireless power transmitting device includes a housing configured to have a feeding surface on which a power receiving device is to be placed; a power transmitting coil disposed inside the housing and configured to have a central axis that intersects with the feeding surface; and an alternating-current power supply configured to supply power to the power transmitting coil, wherein the feeding surface has raised and recessed portions in an area corresponding to a region inside an outer region of the power transmitting coil.Type: GrantFiled: January 25, 2012Date of Patent: September 8, 2015Assignee: FUJITSU LIMITEDInventors: Hiroyasu Kawano, Kiyoto Matsui, Masakazu Taguchi, Satoshi Shimokawa, Akiyoshi Uchida
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Publication number: 20150008736Abstract: A wireless power transfer system includes a plurality of power sources and at least one power receiver, in which power transfer from the power sources to the power receiver is performed in wireless by using magnetic field resonance or electric field resonance. In the system, one of the plurality of power sources is designated as a master power source and the other one or more power sources are designated as slave power sources. In addition, the master power source controls the plurality of power sources and the at least one power receiver to perform the power transfer. This allows the system to perform the power transfer in an optimum state.Type: ApplicationFiled: September 22, 2014Publication date: January 8, 2015Inventors: Akiyoshi Uchida, Kazuyuki Ozaki, MASAKAZU TAGUCHI, SATOSHI SHIMOKAWA, Hiroyasu KAWANO, Kiyoto Matsui
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Publication number: 20140333151Abstract: A power transmitting apparatus includes a power transmission or reception circuit, a first coil connected to the power transmission or reception circuit through wires, a plurality of resonance coils having respective, different diameters one of which is selectively coupled to the first coil through electromagnetic induction, and a position control apparatus configured to control the positions of the resonance coils, wherein the position control apparatus is configured to selectively align an axial direction of one of the resonance coils with an axial direction of the first coil.Type: ApplicationFiled: July 28, 2014Publication date: November 13, 2014Inventors: Kiyoto Matsui, SATOSHI SHIMOKAWA
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Publication number: 20140253029Abstract: A non-contact charging apparatus configured to, vary the inductance and the capacitance of the matching unit for matching the impedance of the power supply system that supplies alternate current power and the impedance of the power transmitting/receiving system including a power transmitting unit and a power receiving apparatus according to the variable information.Type: ApplicationFiled: May 22, 2014Publication date: September 11, 2014Applicant: FUJITSU LIMITEDInventors: Akiyoshi Uchida, MASAKAZU TAGUCHI, Kiyoto Matsui, Hiroyasu KAWANO, SATOSHI SHIMOKAWA
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Publication number: 20140159502Abstract: A power transmission apparatus includes a cover part attached to one of a power transmitter and an electronic apparatus, the power transmitter including a primary-side coil connected to an alternating-current power supply and a primary-side resonant coil configured to receive power from the primary-side coil by electromagnetic induction, the electronic apparatus including a secondary-side coil; and a secondary-side resonant coil disposed in the cover part, and configured to transmit to the secondary-side coil the power received from the primary-side resonant coil by magnetic field resonance generated between the primary-side resonant coil and the secondary-side resonant coil.Type: ApplicationFiled: February 18, 2014Publication date: June 12, 2014Applicant: FUJITSU LIMITEDInventors: Satoshi Shimokawa, Akiyoshi Uchida, Hiroyasu Kawano, Kiyoto Matsui, Masakazu Taguchi
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Patent number: 8666459Abstract: Cellular phones include a power reception resonance coil arranged inside a first outer surface side of a housing, a power extracting unit for extracting power of an induction current of the power reception resonance coil, a magnetic core that has one end arranged inside the first outer surface side and the other end arranged inside a second outer surface side of the housing, and penetrates into the power reception resonance coil, and a printed board that is arranged in a space between the first outer surface and the second outer surface and has an area where circuit elements are not arranged on a periphery of the core.Type: GrantFiled: September 12, 2012Date of Patent: March 4, 2014Assignee: Fujitsu LimitedInventors: Kiyoto Matsui, Masakazu Taguchi, Hiroyasu Kawano, Satoshi Shimokawa, Akiyoshi Uchida