US 10,375,639 B2Granted

Power transmission apparatus for wirelessly supplying power to power reception apparatus

AssigneeCanon Kabushiki Kaisha

InventorNobuyuki Tsukamoto

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Abstract

A power transmission apparatus includes a communication unit that executes communication with an electronic apparatus, a power transmission unit that wirelessly supplies power to the electronic apparatus, and a control unit that controls communication and power supply to be executed alternately, wherein the control unit adjusts communication power of the communication unit and transmission power of the power transmission unit and/or a length of a communication period and a length of a power transmission period, so that an average magnetic field intensity does not exceed a first magnetic field intensity in a predetermined region throughout the communication period of communication executed by the communication unit and the power transmission period of power transmission executed by the power transmission unit.

Claims13

Dependent claims

A power transmission apparatus comprising:

a communication interface configured to execute communication with an electronic apparatus;
a power transmitter configured to wirelessly supply power to the electronic apparatus;
and
a controller configured to control communication executed by the communication interface and power supply executed by the power transmitter to be executed alternately,
wherein the controller adjusts communication power of the communication interface and transmission power of the power transmitter and/or a length of a communication period and a length of a power transmission period so that an average magnetic field intensity does not exceed a first magnetic field intensity in a predetermined region throughout the communication period of communication executed by the communication interface and the power transmission period of power transmission executed by the power transmitter;
wherein the controller adjusts the communication power of the communication interface and the transmission power of the power transmitter and/or the length of the communication period and the length of the power transmission period so that a maximum magnetic field intensity does not exceed a second magnetic field intensity in the predetermined region throughout the communication period of communication executed by the communication interface and the power transmission period of power transmission executed by the power transmitter, and
wherein the first magnetic field intensity is set to 10 A/m and the second magnetic field intensity is set to 12 A/m.

4 more elements

A control method for a power transmission apparatus including a communication interface for executing communication with an electronic apparatus and a power transmitter for wirelessly supplying power to the electronic apparatus, the control method comprising:

controlling communication executed by the communication interface and power supply executed by the power transmitter to be executed alternately;
adjusting communication power of the communication interface and transmission power of the power transmitter and/or a length of a communication period and a length of a power transmission period so that average magnetic field intensity does not exceed a first magnetic field intensity in a predetermined region throughout the communication period of communication executed by the communication interface and the power transmission period of power transmission executed by the power transmitter;
and
adjusting the communication power of the communication interface and the transmission power of the power transmitter and/or the length of the communication period and the length of the power transmission period so that a maximum magnetic field intensity does not exceed a second magnetic field intensity in the predetermined region throughout the communication period of communication executed by the communication interface and the power transmission period of power transmission executed by the power transmitter,
wherein the first magnetic field intensity is set to 10 A/m and the second magnetic field intensity is set to 12 A/m.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/297,976Filed 19 Oct 2016
Priority: JP 2015-20931323 Oct 2015
Published: US 2017/0118713 A127 Apr 2017
Granted: 6 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04W 52/0235
Where the received signal is a wanted signal: where the received signal is a power saving command
H04W 4/80
Services specially adapted for wireless communication networks; Facilities therefor: services using short range communication, e.g. near-field…
H04W 24/08
Supervisory, monitoring or testing arrangements: testing, supervising or monitoring using real traffic
H04W 52/0261
In terminal devices: managing power supply demand, e.g. depending on battery level

Family

US 2017/0118713 A1Pre-grant publication · published 27 Apr 2017
US 10,375,639 B2This patent

From the US filing history. Foreign family members aren’t listed.

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