WIRELESS POWER TRANSMISSION DEVICE AND METHOD

• US 20110156490A1
• Filed: 12/20/2010
• Published: 06/30/2011
• Est. Priority Date: 12/24/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hwang, Chan Soo, Park, Eun Seok, Kwon, Sang Wook, Hong, Young Tack
• Granted Patent: US 9,048,695 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries

Abstract

A wireless power transmission device and method are provided. An amount of power transmitted wirelessly by the wireless power transmission device may be controlled based on information to be transmitted by the wireless power transmission device, such that the information may be transmitted without using any additional device for information transmission. Additionally, an internal impedance of a terminal may be controlled based on information to be transmitted by the terminal, and a reflected wave of a transmission signal transmitted by the wireless power transmission device may be then controlled, such that the information may be transmitted without using any additional device for information transmission. Therefore, no further device may be desired, and thus a power consumption amount may be reduced, and there may be no need to match a communication part for information exchange with a transmission part for wireless power transmission.

Claims

1. A wireless power transmission device, comprising:

a transmitter configured to wirelessly transmit power to a terminal; and

a controller configured to control an amount of power transmitted wirelessly by the transmitter, based on transmission information transmitted to the terminal.

2. The wireless power transmission device of claim 1, wherein the controller comprises a switch, the switch configured to cut off or supply the power transmitted wirelessly to the terminal, depending on the transmission information.

3. The wireless power transmission device of claim 1, wherein the controller is further configured to control a transmission frequency, based on the transmission information.

4. The wireless power transmission device of claim 3, wherein the controller comprises a phase locked loop (PLL) circuit configured to control the transmission frequency.

5. The wireless power transmission device of claim 1, wherein the controller is further configured to control an internal impedance, based on the transmission information.

6. The wireless power transmission device of claim 1, further comprising:

a measuring unit configured to measure a reflected wave of a transmission signal transmitted to the terminal; and

an analyzer configured to analyze, based on the measured reflected wave, terminal information received from the terminal.

7. The wireless power transmission device of claim 6, wherein the measuring unit comprises a directional coupler configured to measure the reflected wave.

8. A terminal, comprising:

a receiver configured to wirelessly receive power from a wireless power transmission device; and

a controller configured to control an internal impedance based on terminal information transmitted to the wireless power transmission device.

9. The terminal of claim 8, wherein the controller comprises:

a first load;

a second load; and

a switch connected to one of;

the first load and the second load, depending on the terminal information.

10. The terminal of claim 8, further comprising:

a measuring unit configured to measure an amount of power received wirelessly from the wireless power transmission device; and

an analyzer configured to analyze, based on the measured amount of power, transmission information received from the wireless power transmission device.

11. A wireless power transmission method, comprising:

wirelessly transmitting power to a terminal; and

controlling an amount of power transmitted wirelessly to the terminal, based on transmission information transmitted to the terminal.

12. The wireless power transmission method of claim 11, further comprising:

measuring a reflected wave of a transmission signal transmitted to the terminal; and

analyzing, based on the measured reflected wave, terminal information received from the terminal.

13. The wireless power transmission method of claim 12, further comprising measuring the reflected wave with a directional coupler.

14. The wireless power transmission method of claim 11, further comprising cutting off or supplying the power transmitted wirelessly to the terminal, depending on the transmission information.

15. The wireless power transmission method of claim 11, further comprising controlling a transmission frequency, based on the transmission information.

16. The wireless power transmission method of claim 11, further comprising controlling an internal impedance, based on the transmission information.

17. A wireless power transmission method, comprising:

wirelessly receiving power from a wireless power transmission device; and

controlling an internal impedance based on terminal information transmitted to the wireless power transmission device.

18. The wireless power transmission method of claim 17, further comprising connecting a switch to one of:

a first load and a second load, depending on the terminal information.

19. The wireless power transmission method of claim 17, further comprising:

measuring an amount of power received wirelessly from the wireless power transmission device; and

analyzing, based on the measured amount of power, transmission information received from the wireless power transmission device.