Power supply apparatus and electronic device, and control method thereof, and wireless power transmission system

An electronic device that includes a rechargeable battery, and can operate by wirelessly receiving power from a power supply apparatus, comprising:

• a power receiving unit configured to contactlessly receive power;
• a communicating unit configured to transmit and receive information;
• a holding unit;
• and
• a controlling unit configured to control the power receiving unit and the communication unit so that power reception by the power receiving unit and communication by the communication are performed alternately and exclusively;
• wherein, when authentication is first performed with a power supply apparatus via the communication unit, the control unit causes the hold unit to hold information indicating a communication mode when communication is established with the power supply apparatus, and
• wherein, when a second authentication is performed with the power supply apparatus in the communication during performing alternately the power reception by the power receiving unit and the communication by the communication unit, the control unit controls the communication unit so as to perform communication in a communication mode based on the information held in the holding unit.

A control method of a power supply apparatus that includes a power transmit unit configured to contactlessly transmit power and a communicating unit configured to transmit/receive information, and wirelessly supplies power to an electronic device, the method comprising:

• a control step of controlling the power transmit unit and the communication unit so that power transmit by the power transmit unit and communication by the communication are performed alternately and exclusively;
• a holding step of holding, when authentication is first performed with an electronic device via the communicating unit, information indicating a communication mode when communication is established with the electronic device;
• and
• a controlling step of controlling the communicating unit so as to perform communication in a communication mode based on the information held in the holding step, when a second authentication is performed with the electronic device via the communicating unit in the communication by the communication unit during performing alternately the power transmit by the power transmit unit and the communication by the communication unit.

A control method of an electronic device including a rechargeable battery, a power receiving unit configured to contactlessly receive power, and a communicating unit configured to transmit and receive information, the method comprising:

• a controlling step of controlling the power receiving unit and the communication unit so that power reception by the power receiving unit and communication by the communication unit are performed alternately and exclusively;
• a holding step of holding, when authentication is first performed with a power supply apparatus via the communicating unit, information indicating a communication mode when communication is established with the power supply apparatus;
• and
• a controlling step of controlling the communicating unit so as to perform communication in a communication mode based on the information held in the holding step, when a second authentication is performed with the power supply apparatus via the communicating unit in the communication during performing alternately the power reception by the power receiving unit and the communication by the communication unit.

A power receiving apparatus, comprising:

• a power receiving unit configured to wirelessly receive power from a power supply apparatus;
• a communicating unit configured to wirelessly communicate with the power supply apparatus;
• and
• a control unit configured to control the power receiving unit and the communication unit so that power reception by the power receiving unit and communication by the communication unit are performed alternately and exclusively;
• wherein the controlling unit controls the communicating unit so as to operate in one of a first mode of transmitting a carrier signal using the communicating unit, and a second mode of, without transmitting a carrier signal, receiving a carrier signal from the power supply apparatus using the communicating unit,
• wherein the controlling unit, upon starting processing for wirelessly receiving power (power reception) from the power supply apparatus, controls the communicating unit so as to operate in the second mode, in wireless communication repeatedly established for controlling the power reception.