ELECTRONIC APPARATUS, CONTROL METHOD OF ELECTRONIC APPARATUS, AND STORAGE MEDIUM

• US 20130207602A1
• Filed: 02/06/2013
• Published: 08/15/2013
• Est. Priority Date: 02/10/2012
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Fukaya, Yudai
• Granted Patent: US 9,425,645 B2
• Time in Patent Office: Days
• US Class Current: 320/108
• 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 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

An electronic apparatus includes a connection unit for connecting a first power supply device, a power receiving unit for receiving power from a second power supply device wirelessly. The electronic apparatus selects either the first power supply device or the second power supply device based on the power supply capacity of the first power supply device.

Claims

1. An electronic apparatus comprising:

a connection unit for connecting to a first power supply device;

a power receiving unit that receives power from a second power supply device wirelessly;

a selection unit that selects either the first power supply device or the second power supply device based on a power supply capacity of the first power supply device; and

a control unit that performs predetermined process using power received from a power supply device selected by the selection unit, wherein the predetermined process includes a process for charging a battery connected to the electronic apparatus.

2. The electronic apparatus according to claim 1,

wherein the selection unit selects the first power supply device if a current supplied to the electronic apparatus from the first power supply device is equal to or greater than a predetermined current;

and

wherein the selection unit selects the second power supply device if the current supplied to the electronic apparatus from the first power supply device is less than the predetermined current.

3. The electronic apparatus according to claim 1,

wherein the selection unit selects either the first power supply device or the second power supply device based on a remaining level of the battery if a current supplied to the electronic apparatus from the first power supply device is less than a predetermined current.

4. The electronic apparatus according to claim 3,

wherein the selection unit selects the second power supply device if the current supplied to the electronic apparatus from the first power supply device is less than the predetermined current and the remaining level of the battery is equal to or greater than a predetermined value;

and

wherein the selection unit selects the first power supply device if the current supplied to the electronic apparatus from the first power supply device is less than the predetermined current and the remaining level of the battery is less than the predetermined value.

5. The electronic apparatus according to claim 1,

wherein the selection unit selects a third power supply device instead of selecting the first power supply device or the second supply device if the third power supply device is connected to the electronic apparatus.

6. The electronic apparatus according to claim 1, further comprising:

a load unit;

wherein the control unit starts process for activating the load unit if the first power supply device is selected and a remaining level of the battery is equal to or greater than a first predetermined value;

wherein the control unit starts process for operating the load unit if the second power supply device is selected and the remaining level of the battery is equal to or greater than a second predetermined value; and

wherein the first predetermined value is smaller than the second predetermined value.

7. The electronic apparatus according to claim 5, further comprising:

a load unit;

wherein the control unit starts process for operating the load unit if the third power supply device is selected.

8. The electronic apparatus according to claim 1,

wherein the first power supply device includes a device for supplying power to the electronic apparatus via a universal serial bus (USB).

9. The electronic apparatus according to claim 1,

wherein the first power supply device includes a universal serial bus (USB) host.

10. The electronic apparatus according to claim 5,

wherein the third power supply device includes an alternating current (AC) adaptor.

11. The electronic apparatus according to claim 1, further comprising:

a resonance unit that controls a resonant frequency of the power receiving unit.

12. The electronic apparatus according to claim 11, wherein the resonance unit matches the resonant frequency of the power receiving unit to a resonant frequency of the second supply device.

13. The electronic apparatus according to claim 1, further comprising:

a communication unit that transmits data indicating the power supply device selected by the selection unit to the second power supply device.

14. The electronic apparatus according to claim 13, wherein

the communication unit transmits data relating to the battery to the second power supply device.

15. The electronic apparatus according to claim 14, wherein the data relating to the battery includes data indicating whether or not the battery and the electronic apparatus are connected.

16. The electronic apparatus according to claim 14, wherein the data relating to the battery includes at least one of data indicating a remaining level of the battery and data indicating a charging status of the battery.

17. The electronic apparatus according to claim 13, wherein

the communication unit transmits data indicating that a supply of power from the first power supply device is stopped to the second power supply device if the first power supply device and the electronic apparatus are not connected.

18. The electronic apparatus according to claim 1, wherein

the selection unit selects again a power supply device which supplies predetermined power to the electronic apparatus based on whether or not the first power supply device and the electronic apparatus are connected, and the predetermined power is used for performing the predetermined process.

19. A control method for controlling an electronic apparatus, wherein the electronic apparatus includes a connection unit for connecting a first power supply device and a power receiving unit for receiving power from a second power supply device wirelessly, the control method comprising:

selecting either the first power supply device or the second power supply device based on a power supply capacity of the first power supply device; and

performing predetermined process using power received from a selected power supply device, wherein the predetermined process includes a process for charging a battery connected to the electronic apparatus.

20. A computer readable storage medium storing a computer program for causing a computer to execute a control method for controlling an electronic apparatus, the electronic apparatus including a connection unit for connecting a first power supply device and a power receiving unit for receiving power from a second power supply device wirelessly, the control method comprising:

selecting either the first power supply device or the second power supply device based on a power supply capacity of the first power supply device; and

performing predetermined process using power received from a selected power supply device, wherein the predetermined process includes a process for charging a battery connected to the electronic apparatus.