Wireless power transmisson apparatus and wireless power transmisson method

• US 9,973,009 B2
• Filed: 03/13/2015
• Issued: 05/15/2018
• Est. Priority Date: 03/13/2014
• Status: Expired due to Fees

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Bae, Su Ho
• Primary Examiner(s): Donovan, Lincoln
• Assistant Examiner(s): Almo, Khareem E
• Application Number:
  US14/657,713
• Publication Number:
  US 20150263535A1
• Time in Patent Office: 1,159 Days
• Field of Search: None
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power transmission apparatus and a wireless power transmission method includes: activating a first wireless transmission unit having a first transmission scheme and deactivating a second transmission unit having a second transmission scheme; transmitting power by the first transmission scheme when a reception scheme of a wireless power reception apparatus is same as the first transmission scheme; deactivating the first wireless transmission unit and activating the second wireless transmission unit when the reception scheme is different from the first transmission scheme; and transmitting the power by the second transmission scheme when the reception scheme is same as the second transmission scheme. Interference between the first wireless transmission unit and the second wireless transmission unit can be prevented from occurring by selectively or sequentially activating the first wireless transmission unit and the second wireless transmission unit.

Claims

1. A wireless power transmission apparatus comprising,

a first wireless transmission unit having a first transmission scheme;

a second wireless transmission unit having a second transmission scheme; and

a controller to determine whether a wireless power reception apparatus exists, identify a reception scheme when the wireless power reception apparatus exists, and transmit a power by the first transmission scheme or the second transmission scheme according to the identified reception scheme,

wherein the controller activates the first wireless transmission unit, deactivates the second wireless transmission unit, and transmits the power by the first transmission scheme when the reception scheme of the wireless power reception apparatus is identical to the first transmission scheme, and

wherein the controller comprises a power supply unit to output power to the first wireless transmission unit or the second wireless transmission unit in a predetermined current, and a detection unit to detect a variation of the current at an output terminal of the power supply unit.

2. The wireless power transmission apparatus according to claim 1, wherein the controller deactivates the first wireless transmission unit and activates the second wireless transmission unit when the reception scheme is different from the first transmission scheme, and transmits the power by the second transmission scheme when the reception scheme is identical to the second transmission scheme.

3. The wireless power transmission apparatus according to claim 2, wherein the controller activates the first wireless transmission unit and deactivates the second wireless transmission unit when the reception scheme is different from the second transmission scheme.

4. The wireless power transmission apparatus according to claim 1, wherein the power supply unit outputs the power for a preset time interval in a preset time period.

5. The wireless power transmission apparatus according to claim 1, wherein the controller determines that the wireless power reception apparatus exists when the variation of the current is detected.

6. The wireless power transmission apparatus according to claim 1, wherein the detection unit comprises a current sensor.

7. The wireless power transmission apparatus according to claim 1, wherein the first transmission scheme is an electromagnetic induction scheme, and the first wireless transmission unit includes a transmission induction coil transmitting the power.

8. The wireless power transmission apparatus according to claim 7, wherein the second transmission scheme is a resonance scheme, and the second wireless transmission unit includes a transmission resonance coil transmitting the power.

9. The wireless power transmission apparatus according to claim 1, wherein the first transmission scheme is a resonance scheme, and the first wireless transmission unit includes a transmission resonance coil transmitting the power.

10. The wireless power transmission apparatus according to claim 9, wherein the second transmission scheme is an electromagnetic induction scheme, and the second wireless transmission unit includes a transmission induction coil transmitting the power.

11. The wireless power transmission apparatus according to claim 1, wherein the first transmission scheme is a resonance scheme, and the second transmission unit includes a transmission resonance coil connected to an AC power.