Patents by Inventor Masakazu Taguchi
Masakazu Taguchi 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: 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: 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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Patent number: 9634493Abstract: In a resonant frequency control method in a magnetic field resonant coupling type power transmission system transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, a high-speed, accurate and real-time adjustment of the resonant frequency of a coil is realized. The phase of a voltage supplied to a power transmitting coil and the phase of a current that flows in the power transmitting coil or a power receiving coil is detected and the resonant frequency of the power transmitting coil or the power receiving coil is varied such that the phase difference between them becomes a target value.Type: GrantFiled: July 31, 2012Date of Patent: April 25, 2017Assignee: FUJITSU LIMITEDInventors: Satoshi Shimokawa, Akiyoshi Uchida, Masakazu Taguchi
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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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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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Patent number: 9276439Abstract: A power supply system includes one or more power transmitters and one or more power receivers: the one or more transmitters transmitting identification information and a power transmitting condition to the one or more receivers, receiving identification information and a power receiving condition from the one or more receivers, wirelessly transmitting power to the one or more receivers on the basis of the power transmitting and receiving conditions, and generating power transmission amount information indicating the amount of the transmitted power; the one or more receivers receiving identification information and a power transmitting condition from the one or more transmitters, transmitting identification information and a power receiving condition to the one or more transmitters, wirelessly receiving power from the one or more transmitters on the basis of the power transmitting and receiving conditions, generating power reception amount information, and transmitting the identification information and the poType: GrantFiled: October 10, 2012Date of Patent: March 1, 2016Assignee: FUJITSU LIMITEDInventor: Masakazu Taguchi
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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: 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
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Publication number: 20130249312Abstract: 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: ApplicationFiled: May 23, 2013Publication date: September 26, 2013Applicant: FUJITSU LIMITEDInventors: Akiyoshi Uchida, MASAKAZU TAGUCHI, SATOSHI SHIMOKAWA, Kiyoto Matsui, Hiroyasu KAWANO
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Publication number: 20130015720Abstract: In a resonant frequency control method in a magnetic field resonant coupling type power transmission system transmitting an electric power from a power transmitting coil to a power receiving coil using magnetic field resonance, a high-speed, accurate and real-time adjustment of the resonant frequency of a coil is realized. The phase of a voltage supplied to a power transmitting coil and the phase of a current that flows in the power transmitting coil or a power receiving coil is detected and the resonant frequency of the power transmitting coil or the power receiving coil is varied such that the phase difference between them becomes a target value.Type: ApplicationFiled: July 31, 2012Publication date: January 17, 2013Applicant: FUJITSU LIMITEDInventors: Satoshi SHIMOKAWA, Akiyoshi UCHIDA, Masakazu TAGUCHI
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Publication number: 20130005408Abstract: 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: ApplicationFiled: September 12, 2012Publication date: January 3, 2013Applicant: FUJITSU LIMITEDInventors: Kiyoto MATSUI, Masakazu TAGUCHI, Hiroyasu KAWANO, Satoshi SHIMOKAWA, Akiyoshi UCHIDA
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Publication number: 20120212069Abstract: 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: ApplicationFiled: January 25, 2012Publication date: August 23, 2012Applicant: Fujitsu LimitedInventors: Hiroyasu KAWANO, Kiyoto Matsui, Masakazu Taguchi, Satoshi Shimokawa, Akiyoshi Uchida
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Patent number: 8217535Abstract: A wireless power supply includes: a power transmitting coil resonant at a first resonant frequency that generates a magnetic field resonance, a power receiving coil resonant at the first resonant frequency, a power receiving unit that outputs energy received by the power receiving resonant coil; a distance detector that detects a distance between the power transmitting resonant coil and the power receiving resonant coil; a power transmitting frequency controller that changes the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector; and a power receiving frequency controller that changes the first resonant frequency of the power receiving resonant coil from the first resonant frequency to a second resonant frequency on the basis of the distance detected by the distance detector.Type: GrantFiled: March 24, 2010Date of Patent: July 10, 2012Assignee: Fujitsu LimitedInventors: Akiyoshi Uchida, Masakazu Taguchi
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Patent number: 7859779Abstract: A magnetic disk apparatus includes a magnetic disk, a magnetic head, a servo reproduction signal generator and a magnetic head controller. The disk includes a data recording area and a servo-pattern area. The data recording area includes a non-magnetic area scattered with magnetic regions, and the servo-pattern area includes uniformly magnetized magnetic regions larger than the magnetic regions in the recording area. The magnetic head reciprocates radially of the disk, giving a magnetization direction to the magnetic regions in the data recording area and reading the magnetization direction of the magnetic regions in the data recording area and the servo-pattern area. The servo reproduction signal generator reads the servo-pattern area, using the magnetic head, via an absolute-value calculation circuit to generate a servo reproduction signal before the recording or reading with respect to the data recording area.Type: GrantFiled: June 5, 2009Date of Patent: December 28, 2010Assignee: Toshiba Storage Device CorporationInventors: Mineo Moribe, Masakazu Taguchi, Kazuyuki Ozaki