Patents by Inventor Kohei Onizuka

Kohei Onizuka 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).

  • Publication number: 20210159735
    Abstract: A wireless power transmission device that transmits wireless power by a radio wave to a plurality of power receivers, has a power transmission condition calculator that calculates power transmission conditions including power transmission periods of two or more of a plurality of different power transmission patterns based on receiving power information and required electric energy information from the plurality of power receivers, and power transmission circuitry that transmits a radio wave while switching between the two or more power transmission patterns under the calculated power transmission conditions.
    Type: Application
    Filed: February 1, 2021
    Publication date: May 27, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kentaro MURATA, Kohei ONIZUKA, Toshiya MITOMO
  • Patent number: 10992181
    Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: April 27, 2021
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tetsu Shijo, Akiko Yamada, Kohei Onizuka, Fumi Moritsuka, Hiroaki Ishihara, Noriaki Oodachi, Shuichi Obayashi, Hiroki Kudo, Kenichirou Ogawa, Shoji Otaka, Hiroki Shoki
  • Patent number: 10868579
    Abstract: According to one embodiment, a wireless device includes a plurality of transmission/reception units and a controller. The each of the plurality of transmission/reception units includes an antenna and is configured to transmit/receive a wireless signal by the antenna. The controller individually controls a frequency of the wireless signal transmitted/received by each of the plurality of transmission/reception units.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: December 15, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Toshiya Mitomo, Kohei Onizuka
  • Publication number: 20200373661
    Abstract: A wireless power transmission device includes a power transmitter to transmit a wireless power signal through a plurality of first antennas, a propagation path estimation unit to estimate first propagation path information characterizing a propagation path between the plurality of first antennas and a predetermined antenna, a propagation path extraction unit to extract second propagation path information characterizing a propagation path passing through a moving body, based on at least one of a difference on a time axis of a plurality of pieces of the first propagation path information each acquired at different times, and filtering on a frequency axis, a weight calculator to calculate a weight vector that determines a directivity of a combined power transmission beam formed by the plurality of first antennas, and a controller to control an amplitude and a phase of the wireless power signal inputted to each of the plurality of first antennas.
    Type: Application
    Filed: August 14, 2020
    Publication date: November 26, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kentaro MURATA, Kohei ONIZUKA, Toshiya MITOMO
  • Patent number: 10777886
    Abstract: A wireless power transmission device includes a power transmitter to transmit a wireless power signal through a plurality of first antennas, a propagation path estimation unit to estimate first propagation path information characterizing a propagation path between the plurality of first antennas and a predetermined antenna, a propagation path extraction unit to extract second propagation path information characterizing a propagation path passing through a moving body, based on at least one of a difference on a time axis of a plurality of pieces of the first propagation path information each acquired at different times, and filtering on a frequency axis, a weight calculator to calculate a weight vector that determines a directivity of a combined power transmission beam formed by the plurality of first antennas, and a controller to control an amplitude and a phase of the wireless power signal inputted to each of the plurality of first antennas.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: September 15, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kentaro Murata, Kohei Onizuka, Toshiya Mitomo
  • Patent number: 10727819
    Abstract: According to one embodiment, an information processing device, includes: a digital-to-pulse converter configured to output a pulse signal including a pulse with a pulse length corresponding to a digital input signal; and a bidirectional selective oscillator including a first ring oscillator and a second ring oscillator, the first ring oscillator including a plurality of delay elements connected in a ring shape in a first direction, the second ring oscillator including a plurality of delay elements connected in a ring shape in a second direction reverse to the first direction. The bidirectional selective oscillator is configured to select one of the first ring oscillator and the second ring oscillator depending on a sign of the digital input signal, oscillate the selected ring oscillator during a period when the pulse is outputted, and keep a state of oscillation operation when the pulse stops being outputted.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: July 28, 2020
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke Toyama, Kentaro Yoshioka, Kohei Onizuka
  • Publication number: 20200091602
    Abstract: A wireless power transmission device includes a power transmitter to transmit a wireless power signal through a plurality of first antennas, a propagation path estimation unit to estimate first propagation path information characterizing a propagation path between the plurality of first antennas and a predetermined antenna, a propagation path extraction unit to extract second propagation path information characterizing a propagation path passing through a moving body, based on at least one of a difference on a time axis of a plurality of pieces of the first propagation path information each acquired at different times, and filtering on a frequency axis, a weight calculator to calculate a weight vector that determines a directivity of a combined power transmission beam formed by the plurality of first antennas, and a controller to control an amplitude and a phase of the wireless power signal inputted to each of the plurality of first antennas.
    Type: Application
    Filed: March 1, 2019
    Publication date: March 19, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kentaro MURATA, Kohei Onizuka, Toshiya Mitomo
  • Publication number: 20200044685
    Abstract: According to one embodiment, a wireless device includes a plurality of transmission/reception units and a controller. The each of the plurality of transmission/reception units includes an antenna and is configured to transmit/receive a wireless signal by the antenna. The controller individually controls a frequency of the wireless signal transmitted/received by each of the plurality of transmission/reception units.
    Type: Application
    Filed: March 7, 2019
    Publication date: February 6, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Toshiya MITOMO, Kohei ONIZUKA
  • Publication number: 20200028384
    Abstract: A wireless power-transmission apparatus includes at least one antenna element disposed at a specific position in a three-dimensional space having a predetermined shape and size, to transmit a power transmission beam, an acquirer to acquire an inclination angle of the antenna element to a plane direction of a reference plane and a height of the antenna element to the reference plane, and a controller to control at least one of antenna power and a power transmission direction of the power transmission beam so that interference power of the power transmission beam toward an outside of the three-dimensional space becomes equal to or smaller than a predetermined allowable value when the antenna element is disposed at the acquired inclination angle and height.
    Type: Application
    Filed: March 7, 2019
    Publication date: January 23, 2020
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kentaro MURATA, Kohei ONIZUKA, Toshiya MITOMO
  • Publication number: 20190273483
    Abstract: According to one embodiment, an information processing device, includes: a digital-to-pulse converter configured to output a pulse signal including a pulse with a pulse length corresponding to a digital input signal; and a bidirectional selective oscillator including a first ring oscillator and a second ring oscillator, the first ring oscillator including a plurality of delay elements connected in a ring shape in a first direction, the second ring oscillator including a plurality of delay elements connected in a ring shape in a second direction reverse to the first direction. The bidirectional selective oscillator is configured to select one of the first ring oscillator and the second ring oscillator depending on a sign of the digital input signal, oscillate the selected ring oscillator during a period when the pulse is outputted, and keep a state of oscillation operation when the pulse stops being outputted.
    Type: Application
    Filed: September 10, 2018
    Publication date: September 5, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yosuke TOYAMA, Kentaro YOSHIOKA, Kohei ONIZUKA
  • Publication number: 20190245388
    Abstract: A wireless power transmission device that transmits wireless power by a radio wave to a plurality of power receivers, has a power transmission condition calculator that calculates power transmission conditions including power transmission periods of two or more of a plurality of different power transmission patterns based on receiving power information and required electric energy information from the plurality of power receivers, and power transmission circuitry that transmits a radio wave while switching between the two or more power transmission patterns under the calculated power transmission conditions.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 8, 2019
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kentaro MURATA, Kohei ONIZUKA, Toshiya MITOMO
  • Patent number: 10320372
    Abstract: An information processing device has a digital-to-pulse converter which outputs a pulse signal including a pulse having a pulse length in accordance with a digital input signal, and a selective oscillator which performs an oscillation operation while the pulse of the pulse signal is output and holds an oscillation operation state at a point of time where the output of the pulse is stopped.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: June 11, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kentaro Yoshioka, Akihide Sai, Kohei Onizuka, Masanori Furuta
  • Patent number: 10263433
    Abstract: According to one embodiment, a power supply device includes a voltage conversion circuit configured to convert a voltage of power generated by a power generation element; a plurality of power storage elements connected in parallel with respective load circuits; a switch circuit configured to switch an electrical connection between the voltage conversion circuit and each of the plurality of power storage elements; and a control circuit configured to measure voltages of the plurality of power storage elements and to control the switch circuit based on the measured voltages.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: April 16, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kohei Onizuka, Takeshi Ueno
  • Patent number: 10224748
    Abstract: According to one embodiment, there is provided a power transmitting device including: a power supply, a resonator, an adjuster and a controller. The power supply supplies AC power. The resonator includes a magnetic core and a coil wound around the magnetic core, the resonator wirelessly transmitting the AC power supplied from the power supply to a different resonator arranged to be opposed to the resonator. The adjuster relatively moves the coil and the magnetic core along a longitudinal direction of the coil. The controller controls the adjuster based on a value of current flowing in the resonator to adjust relative positions of the magnetic core and the coil.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: March 5, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiko Yamada, Tetsu Shijo, Shuichi Obayashi, Hiroaki Ishihara, Kohei Onizuka, Kenichirou Ogawa, Fumi Moritsuka, Hiroki Kudo, Noriaki Oodachi
  • Publication number: 20180343004
    Abstract: An information processing device has a digital-to-pulse converter which outputs a pulse signal including a pulse having a pulse length in accordance with a digital input signal, and a selective oscillator which performs an oscillation operation while the pulse of the pulse signal is output and holds an oscillation operation state at a point of time where the output of the pulse is stopped.
    Type: Application
    Filed: March 7, 2018
    Publication date: November 29, 2018
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kentaro Yoshioka, Akihide Sai, Kohei Onizuka, Masanori Furuta
  • Patent number: 10097991
    Abstract: According to one embodiment, a wireless communication device includes: a first transmitter configured to transmit a first frame to instruct transmission prohibition to a first wireless communication device, and to transmit a signal to a second wireless communication device during a period in which the transmission is prohibited; and a first receiver configured to receive power reception amount information corresponding to the signal after the signal is transmitted.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: October 9, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoya Tandai, Tsuguhide Aoki, Kohei Onizuka
  • Publication number: 20180254671
    Abstract: A wireless power-supply control apparatus to perform control on transmission of power from at least one power transmitter comprising a plurality of first antennas to a plurality of power receivers, has a first communicator and a controller. The first communicator to receive propagation path information between the power transmitter and the plurality of power receivers and requested-power information on requested power of the plurality of power receivers, from the power transmitter or the plurality of power receivers. The controller to control power to be transmitted from the power transmitter to a predetermined value and control at least either one of a phase or an amplitude of power to be supplied to the plurality of first antennas, based on the propagation path information and the requested-power information, so that a specific number of power receivers receiving power larger than the requested power is equal to or larger than a predetermined number.
    Type: Application
    Filed: September 11, 2017
    Publication date: September 6, 2018
    Inventors: Kentaro MURATA, Kohei ONIZUKA
  • Publication number: 20180145518
    Abstract: According to one embodiment, a power supply device includes a voltage conversion circuit configured to convert a voltage of power generated by a power generation element; a plurality of power storage elements connected in parallel with respective load circuits; a switch circuit configured to switch an electrical connection between the voltage conversion circuit and each of the plurality of power storage elements; and a control circuit configured to measure voltages of the plurality of power storage elements and to control the switch circuit based on the measured voltages.
    Type: Application
    Filed: September 18, 2017
    Publication date: May 24, 2018
    Inventors: Kohei ONIZUKA, Takeshi UENO
  • Publication number: 20180084406
    Abstract: According to one embodiment, a wireless communication device includes: a first transmitter configured to transmit a first frame to instruct transmission prohibition to a first wireless communication device, and to transmit a signal to a second wireless communication device during a period in which the transmission is prohibited; and a first receiver configured to receive power reception amount information corresponding to the signal after the signal is transmitted.
    Type: Application
    Filed: March 13, 2017
    Publication date: March 22, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoya TANDAI, Tsuguhide AOKI, Kohei ONIZUKA
  • Publication number: 20170170690
    Abstract: A power transmitting apparatus including a power supply to generate AC power; a power transmitting inductor to transfer the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus; a mutual coupling adjusting unit to adjust a relative position between the power transmitting inductor and the power receiving inductor; and a control unit to control the mutual coupling adjusting unit based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor. The control unit controls the mutual coupling adjusting unit so that the mutual coupling coefficient falls within a predetermined range and an upper limit of the predetermined range is a value less than a maximum of the mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.
    Type: Application
    Filed: February 15, 2017
    Publication date: June 15, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tetsu SHIJO, Akiko YAMADA, Kohei ONIZUKA, Fumi MORITSUKA, Hiroaki ISHIHARA, Noriaki OODACHI, Shuichi OBAYASHI, Hiroki KUDO, Kenichirou OGAWA, Shoji OTAKA, Hiroki SHOKI