POWER RECEIVING APPARATUS, METHOD OF CONTROLLING POWER RECEIVING APPARATUS, AND PROGRAM

• US 20160190871A1
• Filed: 07/18/2014
• Published: 06/30/2016
• Est. Priority Date: 08/09/2013
• Status: Abandoned Application

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nago, Hidetada
• Application Number:
  US14/910,239
• Publication Number:
  US 20160190871A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

The present invention relates to a wireless power transmission system in which power transmission efficiency and safety go hand in hand. A power receiving apparatus includes a requesting unit configured to request power from a power transmitting apparatus; a detection unit configured to detect that the power transmitting apparatus has started transmission of the power requested by the requesting unit, an antenna configured to receive power wirelessly transmitted from the power transmitting apparatus, a load unit configured to operate using the power received through the antenna, and a switching unit configured to switch, in accordance with detection performed by the detection unit, a disconnected state in which the antenna and the load unit are disconnected from each other to a connected state in which the antenna and the load unit are connected to each other.

Claims

1. A power receiving apparatus comprising:

a requesting unit configured to request power from a power transmitting apparatus;

a detection unit configured to detect that the power transmitting apparatus has started transmission of the power requested by the requesting unit;

an antenna configured to receive power wirelessly transmitted from the power transmitting apparatus;

a load unit configured to operate using the power received through the antenna; and

a switching unit configured to switch, in accordance with detection performed by the detection unit, a disconnected state in which the antenna and the load unit are disconnected from each other to a connected state in which the antenna and the load unit are connected to each other.

2. The power receiving apparatus according to claim 1, wherein the detection performed by the detection unit is performed on a basis of a response from the power transmitting apparatus to a request made by the requesting unit.

3. The power receiving apparatus according to claim 1, wherein the detection performed by the detection unit is performed on a basis of a voltage of an output of a rectifier circuit connected to the antenna.

4. The power receiving apparatus according to claim 1, wherein the requesting unit transmits a message requesting power transmission including an amount of requested power.

5. The power receiving apparatus according to claim 1, wherein the request made by the requesting unit is made using wireless communication.

6. The power receiving apparatus according to claim 1, wherein the request made by the requesting unit is made using power received through the antenna.

7. The power receiving apparatus according to claim 1, wherein the switching unit, when power reception is to be terminated, switches the connected state in which the antenna and the load unit are connected to each other to the disconnected state in which the antenna and the load unit are disconnected from each other.

8. The power receiving apparatus according to claim 1, wherein the load unit is not capable of operating in the disconnected state.

9. The power receiving apparatus according to claim 1, wherein, in the connected state, the load unit operates using the power received through the antenna.

10. A control method of controlling a power receiving apparatus comprising:

requesting power from a power transmitting apparatus;

detecting that the power transmitting apparatus has started transmission of the requested power; and

switching, in accordance with the detecting, a state in which an antenna configured to receive power wirelessly transmitted from the power transmitting apparatus and a load unit configured to operate using the power received through the antenna are disconnected from each other to a state in which the antenna and the load unit are connected to each other.

11. A non-transitory computer-readable storage medium storing a program for causing the power receiving apparatus to execute a control method comprising:

requesting power from a power transmitting apparatus;

detecting that the power transmitting apparatus has started transmission of the requested power; and

switching, in accordance with the detecting, a state in which an antenna configured to receive power wirelessly transmitted from the power transmitting apparatus and a load unit configured to operate using the power received through the antenna are disconnected from each other to a state in which the antenna and the load unit are connected to each other.