Kabushiki Kaisha Toshiba

Kohei Onizuka

Hiroaki Ishihara

Shoji Otaka

Toshiya Mitomo

Kentaro Murata

Fumi Moritsuka

Shuichi Obayashi

Takeshi Ueno

Hiroki Kudo

Tetsu Shijo

Akiko Yamada

Kenichirou Ogawa

Noriaki Oodachi

Osamu Watanabe

Masahiro Hosoya

Hiroki Shoki

Kentaro Yoshioka

Shigehito Saigusa

Tomoya Tandai

Kiyoshi Toshimitsu

Masanori Furuta

Tsuguhide Aoki

Akihide Sai

Satoshi Takaya

Yosuke Toyama

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.

Wireless power transmission device and wireless power transmission system

According to one embodiment, an electronic apparatus includes a processor configured to: acquire communication data from at least one communication apparatus that perform wireless communication with a plurality of the communication devices; acquire information related to a wireless power supply performed by a wireless power supply apparatus to the at least one communication apparatus; and generate a control signal indicating an instruction of at least one of the wireless power supply or the wireless communication based on the communication data and the information related to the wireless power supply.

Electronic apparatus, system, method, and computer program

an electronic circuit according to an embodiment includes: a generation circuit generating a first clocksignal and a second clocksignal delayed from the first clocksignal; a first coupler transmitting one of the first and the second clocksignals by electromagnetic coupling; a first converter driven by the transmitted clocksignal and converting a first input signal into a first signal of a frequency corresponding to the transmitted clocksignal; a second coupler transmitting the first signal by electromagnetic coupling; a second converter converting the first signal into a second signal of a frequency corresponding to the first input signal with the other of the first and the second clocksignals; an output device outputting the second signal; and a protection circuit connected to a line through which the one of the first and the second clocksignals is transmitted between the first coupler and the first converter.

Electronic circuit and electronic apparatus

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.

Wireless power-transmission apparatus and wireless power-transmission method

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.

Wireless power-supply control apparatus, power transmitter, and power receiver

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.

Power transmitting apparatus, power receiving apparatus, control apparatus, and wireless power transfer system

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.

Device for controlling receiver to receive wireless signal

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.

Wireless power transmission device, wireless power transmission system, and wireless power transmission method

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.

Information processing device, semiconductor device, and information processing method

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.

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.

Power supply device, power supply system, and sensor system

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.

Power transmitting device, power receiving device, and wireless power transmitting system

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.

Wireless communication device and method for transmitting energy by optimum parameters

There is provided a power transmitting apparatus including: a power supply, a power transmitting inductor, a mutual coupling adjusting unit and a control unit, in which the power supply supplies AC power, the power transmitting inductor transfers the AC power to a power receiving apparatus through magnetic coupling with a power receiving inductor in the power receiving apparatus, the mutual coupling adjusting unit adjusts a relative position between the power transmitting inductor and the power receiving inductor, and the control unit controls the mutual coupling adjusting unit, based on a mutual coupling coefficient between the power transmitting inductor and the power receiving inductor.

Growing community of inventors

Tokyo, Japan

Kohei Onizuka