Canon Kabushiki Kaisha

Hajime Shimura

Makoto Aoki

Takahiro Shichino

Kazuo Moritomo

Motoki Tagawa

Tomoki Hiramatsu

Hiroto Kondo

Jun Morita

Yutaka Ishinari

Hajime Iwase

Tomoyasu Soma

Tatsuhiko Sakai

Hirohiko Inohiza

Tomohisa Ishigami

A power transmitting apparatus () that transmits power wirelessly using a time-division method to a plurality of power receiving apparatuses () derives a plurality of pieces of data of power loss between the power transmitting apparatus () and the plurality of power receiving apparatuses () on a basis of a plurality of reception power values received from the plurality of power receiving apparatuses (); and detects a foreign object within a power-transmittal range of the power transmitting apparatus () on a basis of the plurality of pieces of data of power loss.

Power transmitting apparatus, control method for power transmitting apparatus, and storage medium

A power transmission apparatus performs wireless power transmission to a power receiving apparatus using at least one of a plurality of coils including a first coil and a second coil disposed at a position closer to the first coil than a position separated from the first coil by a specific distance, and perform object detection by outputting one or more signal for object detection from one or more of the plurality of coils. Signals for object detection are not outputted at a same time from the first coil and the second coil.

Power transmission apparatus, control method of power transmission apparatus, and storage medium

A power transmission apparatus wirelessly transmits power to a power receiving apparatus via a power transmission antenna, measures at least either of a voltage and a current in the power transmission antenna at least two or more time points of a power transmission restriction period in which power to be transmitted to a power receiving apparatus is restricted, and performs measurement processing, including first measurement processing and second measurement processing, plurality of times. In this process, a processing period related to the first measurement processing and a processing period related to the second measurement processing are controlled to have different lengths.

Power transmission apparatus, power receiving apparatus, control method, and storage medium

A power transmission apparatus includes a first power transmission unit configured to perform wireless power transmission to a power receiving apparatus in a first region by using at least one of a plurality of coils, a second power transmission unit configured to perform wireless power transmission to a power receiving apparatus in a second region by using at least one of the plurality of coils. In a case where, while the first power transmission unit performs wireless power transmission to a first power receiving apparatus in a common region where the first region and the second region overlap, a second power receiving apparatus is placed in a region of the first region other than the common region, the first power transmission unit stops the wireless power transmission to the first power receiving apparatus and the second power transmission unit performs wireless power transmission to the first power receiving apparatus.

A power receiving apparatus capable of receiving power transmitted from a power transmitting apparatus capable of executing first foreign object detection and second foreign object detection, transmits, to the power transmitting apparatus, data to be used by the power transmitting apparatus to execute the first foreign object detection; before transmitting the data, determines whether a predetermined condition for the power transmitting apparatus to execute the second foreign object detection different from the first foreign object detection is satisfied; and transmits, to the power transmitting apparatus, a signal for causing the power transmitting apparatus to execute the second foreign object detection in accordance with the determination.

Power receiving apparatus, power transmitting apparatus, control methods thereof, and a non-transitory computer-readable storage medium

A radiation detection apparatus includes a housing that includes an incidence surface and a back surface located on the opposite side of the incidence surface, a sensor panel that is housed in the housing and configured to convert radiation incident from the incidence surface into an electrical signal, a conductive plate that is housed in the housing and extends in a direction intersecting with a normal to the incidence surface, and an antenna element housed in the housing. The conductive plate is located between the sensor panel and the back surface. The antenna element is located between the conductive plate and the back surface. The antenna element includes a portion that extends in the direction intersecting with the normal to the incidence surface. The conductive plate is configured to function as a ground for the antenna element.

Radiation detection apparatus

A radiation detection apparatus includes a housing having an incident face and a side face, a reflective member accommodated within the housing, the reflective member having a reflective face which reflects radio waves, and an antenna element accommodated within the housing. The side face of the housing includes a conductor region and a transmissive region, the transmissive region having a higher radio wave transmittance than the conductor region. The reflective member is disposed in a position at which a first radio wave, which proceeds directly from the antenna element toward the transmissive region, and a second radio wave, which reaches the reflective face from the antenna element and is reflected toward the transmissive region by the reflective face, strengthen each other.

A communication device includes transmitting means for transmitting a signal in one or more frequency bands of a frequency channel including a plurality of frequency bands, identifying means for identifying occupancy of the plurality of frequency bands, and control means for controlling transmission power for transmitting the signal from the transmitting means, on the basis of an identification result obtained by the identifying means.

Communication device, information processing device, control method, and program

A power transmitting apparatus measures a waveform attenuation rate of a transmission power waveform, at a transmission antenna, in a state in which the power transmission by the power transmitting is restricted, sets a threshold used for detecting a foreign object between the power transmitting apparatus and the power receiving apparatus on the basis of the measured waveform attenuation rate, and determines whether or not the foreign object is present on the basis of the waveform attenuation rate measure after the threshold is set and the threshold.

Power transmitting apparatus, power receiving apparatus, method therefor, and storage medium

A wireless communication apparatusincludes: a first communication unit configured to perform wireless communication that supports a plurality of wireless communication systems with different using frequency bands; a second communication unit configured to perform wired communication that supports a plurality of wired communication systems each with a different basic frequency used in data communication; and a switching unit configured to switch a wired communication system used in the wired communication by the second communication unit so that the basic frequency falls outside a predetermined frequency band including the using frequency bands of the wireless communication by the first communication unit.

Wireless communication apparatus and control method therefor

A wireless power transmission system wirelessly transmits power from a power transmission apparatus to a power reception apparatus. The system performs detection processing using a first detection method for detecting an object different from the power reception apparatus. The system determines whether a predetermined condition related to a state of at least either one of the power transmission apparatus and the power reception apparatus is satisfied. Then, the system performs object detection processing using a second detection method, different from the first detection method, according to a result of the determination regarding whether the predetermined condition is satisfied.

Power transmission apparatus, power reception apparatus, method for controlling wireless power transmission system, and storage medium

An antenna includes: a feeding point; an antenna element unit having one end connected to the feeding point and the other end connected to the ground conductor; and a first conductive portion connected to the ground conductor. The antenna element unit has, between one end and the other end, a second conductor portion having a shape in which a plurality of bent parts are formed, and at least a part of the antenna element unit and at least a part of the first conductive portion are electromagnetically coupled with each other.

Antenna

A filter which stops the propagation of an electromagnetic wave of a predetermined frequency band in a signal line or a power supply line is provided. This filter is a conductor connected to the signal line or the power supply line. This conductor is configured to include a linear portion. The first portion of the linear portion with an end portion connected to the signal line or the power supply line has the first width, and the second portion different from the first portion of the linear portion has the second width different from the first width.

Growing community of inventors

Yokohama, Japan

Hajime Shimura