Electronic Device and Method for Wireless Charging in Electronic Device

• US 20170133889A1
• Filed: 11/09/2016
• Published: 05/11/2017
• Est. Priority Date: 11/10/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: YEO, Sung-Ku, KIM, Dong-Zo, KIM, Bong-Chul, KIM, Yu-Su
• Granted Patent: US 10,461,583 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/00 Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00 architectures of general purpose stored program computers G06F15/76
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 7/00712 the cycle being controlled or terminated in response to electric parameters

Abstract

An electronic device according to various embodiments of the present disclosure includes a power supply configured to supply DC power, a controller configured to determine a wireless power transmission mode or a wireless power reception mode if at least one electronic device is detected, and output a control signal indicating a wireless power transmission frequency supported by the detected electronic device from among a plurality of wireless power transmission frequencies if the wireless power transmission mode is determined, a conversion circuit configured to output the DC power supplied from the power supply as AC power in response to the control signal output from the controller and a wireless power transceiver configured to transmit the AC power supplied.

Claims

1. An electronic device comprising:

a power supply configured to supply direct current (DC) power;

a controller configured to;

determine a wireless power transmission mode or a wireless power reception mode if an external electronic device is detected, and output a first control signal corresponding to a wireless power transmission frequency supported by the external electronic device from among a plurality of wireless power transmission frequencies if the wireless power transmission mode is determined;

a conversion circuit configured to convert the DC power supplied by the power supply to alternating current (AC) power in response to the first control signal; and

a wireless power transceiver configured to transmit the AC power from the conversion circuit.

2. The electronic device of claim 1, further comprising a transmission/reception switch configured to:

receive a second control signal from the controller depending on whether the wireless power transmission mode or the wireless power reception mode has been determined by the controller, and switch a connection path of the conversion circuit to the power supply or a charging circuit depending on the second control signal.

3. The electronic device of claim 1, wherein the conversion circuit is configured to convert the AC power received through the wireless power transceiver into DC power in the wireless power reception mode.

4. The electronic device of claim 1, wherein the wireless power transmission frequency includes at least one of a frequency corresponding to a resonance scheme, a frequency corresponding to an induction scheme, and a frequency corresponding to a radio wave radiation scheme.

5. The electronic device of claim 1, wherein the conversion circuit is implemented with a full-bridge field-effect transistor (FET) circuit configured using four metal oxide semiconductor field-effect transistors (MOSFETs).

6. The electronic device of claim 1, wherein the conversion circuit is implemented with a circuit including two MOSFETs and two diodes.

7. The electronic device of claim 1, wherein the wireless power transceiver includes a plurality of coils each corresponding to a frequency of the plurality of wireless power transmission frequencies.

8. The electronic device of claim 1, wherein the wireless power transceiver includes:

an induction scheme wireless power transceiver configured to transmit and receive wireless power corresponding to a frequency of an induction scheme; and

a resonance scheme wireless power transceiver configured to transmit and receive wireless power corresponding to a frequency of a resonance scheme.

9. The electronic device of claim 8, wherein the induction scheme wireless power transceiver and the resonance scheme wireless power transceiver are connected to the conversion circuit in parallel.

10. The electronic device of claim 8, wherein at least one of the induction scheme wireless power transceiver and the resonance scheme wireless power transceiver includes a coil and at least one capacitor.

11. A method for wireless charging in an electronic device, the method comprising:

determining a wireless power transmission mode or a wireless power reception mode if an external electronic device is detected;

determining a wireless power transmission frequency supported by the external electronic device from among a plurality of wireless power transmission frequencies if the wireless power transmission mode is determined;

converting direct current (DC) power to alternating current (AC) power based on a control signal corresponding to the wireless power transmission frequency; and

transmitting the AC power.

12. The method of claim 11, further comprising:

detecting power applied to a coil of the electronic device; and

detecting a load change due to the external electronic device from the detected power.

13. The method of claim 12, further comprising determining the wireless power reception mode if the detected load change due to the external electronic device meets a preset condition.

14. The method of claim 13, further comprising:

converting the power applied to the coil from AC power to DC power; and

charging a battery with the DC power.

15. The method of claim 11, wherein the wireless power transmission frequency includes at least one of a frequency corresponding to a resonance scheme, a frequency corresponding to an induction scheme, and a frequency corresponding to a radio wave radiation scheme.

16. The method of claim 11, wherein determining the wireless power transmission frequency comprises using in-band communication between the electronic device and the external electronic device.

17. The method of claim 11, wherein determining the wireless power transmission frequency comprises using out-of-band communication between the electronic device and the external electronic device.

18. The method of claim 11, wherein determining the wireless power transmission frequency comprises:

determining the wireless power transmission frequency using in-band communication by a coil for transmitting and receiving wireless power; and

determining the wireless power transmission frequency using out-of-band communication if the wireless power transmission frequency is not determined through the in-band communication.

19. The method of claim 11, wherein determining the wireless power transmission frequency comprises one of communicating according to a communication protocol of an induction scheme and communicating according to a communication protocol of a resonance scheme.

20. The method of claim 11, wherein determining the wireless power transmission frequency comprises simultaneously communicating according to a communication protocol of an induction scheme and according to a communication protocol of a resonance scheme.