Wireless power transmitting unit, wireless power receiving unit, and control methods thereof

• US 9,716,396 B2
• Filed: 03/21/2014
• Issued: 07/25/2017
• Est. Priority Date: 03/21/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Kyung-Woo, Kwon, Hyuk-Choon, Byun, Kang-Ho, Jung, Hee-Won
• Primary Examiner(s): Lin, Sun
• Application Number:
  US14/221,883
• Publication Number:
  US 20140285142A1
• Time in Patent Office: 1,222 Days
• Field of Search: 320108
• 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
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A control method of a wireless power receiving unit receiving charging power from a wireless power transmitting unit to perform wireless charging is provided. The control method includes receiving the charging power from the wireless power transmitting unit; detecting a change in a wireless charging environment; generating a signal indicating detection of the change in the wireless charging environment; and transmitting the signal indicating the detection of the change in the wireless charging environment to the wireless power transmitting unit.

Claims

1. A control method of a wireless power receiving unit, the control method comprising:

receiving wireless charging power from a wireless power transmitting unit;

detecting that a wired charging unit is connected to the wireless power receiving unit; and

transmitting a first message indicating that the wireless power receiving unit is powered by the wired charging unit to the wireless power transmitting unit in response to detecting that the wired charging unit is connected to the wireless power receiving unit.

2. The control method of claim 1, wherein the first message is one of a Power Receiving Unit (PRU) dynamic signal or a PRU alert signal.

3. The control method of claim 1, wherein transmitting the first message to the wireless power transmitting unit comprises inserting information indicating that the wireless power receiving unit is powered by the wired charging unit into a PRU alert field of a PRU dynamic signal and transmitting the first message.

4. The control method of claim 1, wherein detecting that the wired charging unit is connected to the wireless power receiving unit comprises:

determining whether a preset voltage is applied to a charging control circuit of the wireless power receiving unit; and

detecting whether the wired charging unit is inserted according to whether the preset voltage is applied.

5. The control method of claim 4, wherein detecting that the wired charging unit is connected to the wireless power receiving unit comprises detecting an insertion of the wired charging unit when the preset voltage is applied to the charging control circuit.

6. The control method of claim 4, further comprising detecting that the wired charging unit is disconnected from the wireless power receiving unit, when the preset voltage is not applied to the charging control circuit.

7. The control method of claim 1, further comprising:

detecting an error state of the wireless power receiving unit;

generating a second message including information on the detected error state; and

transmitting the second message to the wireless power transmitting unit.

8. The control method of claim 7, wherein the information on the detected error state is at least one of over voltage, over current, and over temperature.

9. The control method of claim 7, further comprising transmitting a third message notifying of a release of the error state when the release of the error state is detected.

10. A wireless power receiving unit, comprising:

a power receiving resonator configured to receive wireless power from a wireless power transmitting and

a controller configured to detect that a wired charging unit is connected to the wireless power receiving unit, and control a communication unit to transmit a first message indicating that the wireless power receiving unit is powered by the wired charging unit to the wireless power transmitting unit in response to detecting that the wired charging unit is connected to the wireless power receiving unit.

11. The wireless power receiving unit of claim 10, wherein the first message is one of a Power Receiving Unit (PRU) dynamic signal or a PRU alert signal.

12. The wireless power receiving unit of claim 10, wherein the controller inserts information indicating that the wireless power receiving unit is powered by the wired charging unit into a PRU alert field of a PRU dynamic signal and transmits the first message through the communication unit.

13. The wireless power receiving unit of claim 10, wherein the controller determines whether a preset voltage is applied to a charging control circuit of the wireless power receiving unit to detect that the wired charging unit is connected to the wireless power receiving unit.

14. The wireless power receiving unit of claim 10, wherein the controller detects an error state of the wireless power receiving unit and controls the communication unit to transmit a second message including information on the detected error state to the wireless power transmitting unit.

15. The wireless power receiving unit of claim 14, wherein the information on the detected error state is at least one of over voltage, over current, and over temperature.

16. The wireless power receiving unit of claim 14, wherein the controller controls the communication unit to transmit a third message notifying the wireless power transmitting unit of a release of the error state when the release of the error state is detected.

17. A control method of a wireless power transmitting unit, the control method comprising:

transmitting wireless power to a wireless power receiving unit;

receiving a first message including information indicating that the wireless power receiving unit is powered by a wired charging unit from the wireless power receiving unit; and

adjusting the wireless power for the wireless power receiving unit in response to receiving the first message.

18. The control method of claim 17, wherein the first message is one of a Power Receiving Unit (PRU) dynamic signal or a PRU alert signal.

19. The control method of claim 17, further comprising:

receiving a second message from the wireless power receiving unit;

determining whether the wired charging unit is disconnected from the wireless power receiving unit based on information included in the second message; and

re-adjusting the wireless power and transmitting the wireless power to the wireless power receiving unit when the wired charging unit is disconnected from the wireless power receiving unit.

20. The control method of claim 17, further comprising:

receiving a third message reporting an error state detected by the wireless power receiving unit from the wireless power receiving unit; and

controlling the wireless power in accordance with the error state.

21. The control method of claim 20, further comprising re-adjusting the wireless power and transmitting the wireless power to the wireless power receiving unit when a fourth message notifying a release of the error state is received.

22. The control method of claim 17, further comprising:

transmitting a fifth message for controlling the wireless power receiving unit not to receive the wireless power.

23. The control method of claim 17, further comprising:

maintaining a communication session between the wireless power receiving unit and the wireless power transmitting unit after receiving the first message.

24. A wireless power transmitting unit comprising:

a power transmitting resonator configured to transmit wireless power to a wireless power receiving unit;

a communication unit configured to receive a first message including information indicating that the wireless power receiving unit is powered by a wired charging unit; and

a controller configured to adjust the wireless power for the wireless power receiving unit in response to receiving the first message.

25. The wireless power transmitting unit of claim 24, wherein the first message including the information indicating that the wireless power receiving unit is powered by the wired charging unit is one of a Power Receiving Unit (PRU) dynamic signal or a PRU alert signal.

26. The wireless power transmitting unit of claim 24, wherein the controller adjusts the wireless power applied to the power transmitting resonator when the message including the information indicating that the wireless power receiver unit is powered by the wired charging unit is received.

27. The wireless power transmitting unit of claim 24, wherein the communication unit receives a second message including information on an error state detected by the wireless power receiving unit from the wireless power receiving unit and the controller adjusts the wireless power applied to the power transmitting resonator in accordance with the error state.

28. The wireless power transmitting unit of claim 27, wherein the information on the error state is at least one of over voltage, over current, and over temperature.

29. The wireless power transmitting unit of claim 27, wherein the communication unit receives a third message notifying of a release of the error state from the wireless power receiving unit and the controller re-adjusts the power and controls the power transmitting resonator to transmit the power to the wireless power receiving unit.

30. The wireless power transmitting unit of claim 24, wherein the controller is further configured to control the communication unit to transmit a fourth message for controlling the wireless power receiving unit not to receive the wireless power.

31. The wireless power transmitting unit of claim 24, the communication unit is further configured to maintain a communication session between the wireless power receiving unit and the wireless power transmitting unit after receiving the first message.