Canon Kabushiki Kaisha

Hidetada Nago

Kenichi Fujii

Takahiro Shichino

Norihiro Mochizuki

Takatoshi Hirose

Tetsuo Kanda

Toshihiko Myojo

Katsuo Saito

Ichiro Kato

Tatsuhiko Sakai

Fumihide Goto

Yu Tanaka

Hiroshi Mashimo

Akane Yokota

Koji Yukimasa

A communication apparatus includes first communication means having a first communication function for wirelessly communicating with a partner apparatus, and second communication means having an electric power supply function for wirelessly supplying electric power to the partner apparatus and a second communication function for wirelessly communicating with the partner apparatus. The second communication function is for transmitting specific data sequence to the partner apparatus in response to reception of specific data from the partner apparatus, and the electric power supply function is for supplying electric power to the partner apparatus in a case of receiving from the partner apparatus, with the first communication means, a signal indicating that the partner apparatus has received the data sequence.

Communication apparatus, control method, and storage medium

A wireless transmission system includes first and second transmission line couplers. The first transmission line coupler is arranged in an annular shape and formed of a pair of signal lines that transmit a differential signal. The second transmission line coupler is shorter than the first transmission line coupler and formed of a pair of signal lines that transmit a differential signal. The first and second transmission line couplers are arranged so that, if at least one of the first and second transmission line couplers rotates about a rotational axis and if one of the signal lines of the second transmission line coupler crosses a gap between the ends of one of the signal lines of the first transmission line coupler, the other signal line of the second transmission line coupler does not cross a gap between the ends of the other signal line of the first transmission line coupler.

Wireless transmission system, control method, and storage medium

A first power receiving apparatus observes a power transfer signal from a power supply apparatus, and detects whether power transfer is being performed between the power supply apparatus and a second power receiving apparatus. When the power transfer is being performed between the power supply apparatus and the second power receiving apparatus, a waveform of the signal is deformed with a predetermined pattern. The second power receiving apparatus detects deterioration in power which is received from the power supply apparatus and detects whether the waveform of the signal changes with the predetermined pattern within a predetermined time after detecting the power deterioration. When detecting the change in the waveform of the signal with the predetermined pattern, the second power receiving apparatus determines that the first power receiving apparatus is in a power suppliable range of the power supply apparatus.

Power transfer system, power receiving apparatus, control method, and storage medium

Power transfer system, power receiving apparatus, control method, and storage medium for determining when received power is deteriorated

A power transmission device sets, as a target of power transmission, a second power reception device that has transmitted a notification signal including predetermined information while power transmission, using electromagnetic waves modulated to transmit the predetermined information, is being performed to a first power reception device, where the setting the second power reception device as a target of the power transmission performed is performed depending on a result of a negotiation with the second power reception device.

Power transmission device, control method for power transmission device, and storage medium

A wireless power transmission apparatus includes a first antenna unit configured to perform wireless power transmission with another apparatus, a communication unit configured to include a second antenna unit which is different from the first antenna unit and perform communication for authentication in the wireless power transmission with the other apparatus using electric power received through the first antenna unit, a load configured to operate using the electric power received through the first antenna unit; and a transformation unit configured to be connected to the first antenna unit and perform impedance transformation. The transformation unit performs impedance transformation in accordance with electric power consumed by the communication unit during the communication for authentication performed by the communication unit and performs impedance transformation in accordance with electric power consumed by the load when the authentication is successfully performed.

Wireless power transmission/reception apparatus

An apparatus includes a recognition unit configured to recognize a function included in a communication partner and a determination unit configured to determine processing, which the communication partner performs on transmission data, according to the recognized function and a type of the transmission data.

Communication apparatus for utilizing a plurality of application based on a communication partner

Communication apparatus, control method, and storage medium for transferring power

The present invention provides an antenna in which first and second conductors each having a first width are spirally arranged on first and second planes, respectively, such that a conductor-to-conductor distance is equal to a second width, and an inter ends of spirals of the first and second conductors are connected with a conductor. In this antenna, the direction in which the spiral of the first conductor runs from its outer end to its inter end and the direction in which the spiral of the second conductor runs from its inter end to its outer end correspond to each other, the first width is greater than or equal to the second width, and the first and second conductors are alternately arranged in at least a portion thereof as viewed in a radius direction from an axis of the spiral.

Antenna and communication apparatus

Communication apparatus utilizing a plurality of transmission applications based on a communication partner

By controlling a plurality of communication apparatuses, when determining the communication channel used by each apparatus, conducting determination of channel allocation priority order of communication apparatuses, based on the extracted load information of the communication apparatus. Based on the determined channel allocation priority order, setting the communication channels as they should be set, in case the other communication apparatus can not conduct communication in the channels the aforementioned channel is set, the channel is allocated as the channel used by the communication apparatus.

Communication channel determination method and a determination apparatus

A wireless communication apparatus that transmits data in certain communication interval to a receiving apparatus, using one or more communication channels among a plurality of adjacent communication channels, is provided. The apparatus includes: a setting unit configured to set the one or more communication channels for transmitting the data; a transmission unit configured to transmit the data using the one or more set communication channels; and a detection unit configured to detect interference with other wireless communication apparatuses, when the transmission unit transmits the data using the one or more set communication channels; wherein the setting unit changes the number of the one or more communication channels based on a time duration that the data transmission has been restrained due to the detected interference, and the communication interval.

Wireless communication apparatus, method and a computer program enabling switching of communication channel based on interference detection

A loop antenna includes a parasitic element arranged at a position almost concentric to a loop element and having an opening portion smaller than the half perimeter of the loop element at a position opposite to the feeding point of the loop element.

Growing community of inventors

Kawasaki, Japan

Hidetada Nago