Wireless powered television

• US 9,160,203 B2
• Filed: 10/06/2011
• Issued: 10/13/2015
• Est. Priority Date: 09/27/2008
• Status: Active Grant

• Current Assignee: WiTricity Corporation
• Original Assignee: WiTricity Corporation
• Inventors: Fiorello, Ron, Campanella, Andrew J., Hall, Katherine L., Kesler, Morris P., Kulikowski, Konrad, Giler, Eric R.
• Primary Examiner(s): AMAYA, CARLOS DAVID
• Application Number:
  US13/267,750
• Publication Number:
  US 20120091795A1
• Time in Patent Office: 1,468 Days
• Field of Search: 307/104
• US Class Current: 1/1
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 53/12 Inductive energy transfer
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/38 specially adapted for charging by inductive energy transfer
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: G06F 1/16 Constructional details or arrangements
• CPC Class Codes: H01F 2003/005 Magnetic cores for receiving several windings with perpendicular axes, e.g. for antennae or inductive power transfer
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H03H 7/40 Automatic matching of load impedance to source impedance
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• CPC Class Codes: H04L 9/3278 using physically unclonable functions [PUF]
• CPC Class Codes: H04N 21/42222 Additional components integrated in the remote control device, e.g. timer, speaker, sensors for detecting position, direction or movement of the remote control, microphone or battery charging device
• CPC Class Codes: H04N 5/64 : Constructional details of receivers, e.g. cabinets or dust covers furniture aspects of television cabinets A47B81/06
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 : Electric charging stations
• CPC Class Codes: Y02T 90/14 : Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y04S 10/126 : the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

A wireless power system for powering a television includes at least one device resonator including at least one loop of conductive material, a matching network including at least two capacitive elements, and power and control circuitry coupled to the matching network and configured to connect with a load of the television, wherein the at least one device resonator is configured to wirelessly receive power via an oscillating magnetic field generated by a source resonator when the distance between the source resonator and the at least one device resonator is at least 2 cm, wherein the load of the television is configured to draw at least 5 Watts of power, and wherein an efficiency of wirelessly receiving power by the least one device resonator is at least 50%.

Claims

1. A wireless power system for powering a television, the system comprising:

at least one device resonator comprising at least one loop of conductive material;

a matching network coupled to the loop of conductive material and comprising at least two capacitive elements; and

power and control circuitry coupled to the matching network at two terminals and configured to connect with a load of the television;

wherein the matching network is configured to provide voltages of equal magnitude and opposite sign at the terminals when coupling power from the device resonator to the power and control circuitry,

wherein the at least one device resonator is configured to wirelessly receive power via an oscillating magnetic field generated by a source resonator when the distance between the source resonator and the at least one device resonator is at least 2 cm,

wherein the load of the television is configured to draw at least 5 Watts of power; and

wherein an efficiency of wirelessly receiving power by the least one device resonator is at least 50%.

2. The system of claim 1, wherein the at least one device resonator comprises a trace on a printed circuit board.

3. The system of claim 1, wherein the at least one device resonator comprises Litz wire.

4. The system of claim 1, wherein the at least one device resonator comprises magnetic material.

5. The system of claim 1, wherein the at least one device resonator comprises tiled ferrite blocks.

6. The system of claim 1, wherein the at least one device resonator has a resonant frequency of approximately 6.78 MHz.

7. The system of claim 1 wherein the at least one device resonator has a resonant frequency of approximately 13.56 MHz.

8. The system of claim 1, wherein the at least one device resonator has a resonant frequency of approximately 250 kHz.

9. The system of claim 1, further comprising a control mechanism for controlling the amount of wireless power received by the at least one device resonator.

10. The system of claim 1, further comprising any of an amplifier circuit, a rectifier circuit, a filter circuit, and a feedback circuit.

11. The system of claim 1, wherein the at least one device resonator is configured to wirelessly receive power when the source resonator is positioned behind an item hung on a wall.

12. The system of claim 1, wherein the at least one device resonator is configured to wirelessly receive power when the source resonator is positioned behind a wall.

13. The system of claim 1, wherein the at least one device resonator is configured to wirelessly receive power when the source resonator is positioned within a cabinet.

14. The system of claim 1, wherein the at least one device resonator is configured to receive power when the source resonator and the at least one device resonator are positioned substantially parallel to each other.

15. The system of claim 1, wherein the at least one device resonator is configured to receive power when the source resonator and the at least one device resonator are positioned substantially perpendicular to each other.

16. The system of claim 1, wherein the at least one device resonator is configured to receive power when the at least one device resonator is attached to the outside of the television.

17. The system of claim 1, wherein the at least one device resonator is retrofit to the television.

18. The system of claim 1, wherein the at least one device resonator is integrated into the television.

19. The system of claim 1, wherein the at least one device resonator is integrated into the back of the television.

20. The system of claim 1, wherein the at least one device resonator is integrated into the base of the television.

21. The system of claim 1, wherein the system receives information signals wirelessly via the oscillating magnetic field.

22. The system of claim 1, wherein the at least two capacitive elements of the matching network comprise a tunable capacitor.

23. The system of claim 22, wherein the tunable capacitor is in parallel with the at least one loop of conductive material relative to the two terminals.

24. The system of claim 23, wherein the power and control circuitry is adapted to tune a capacitance of the tunable capacitor to increase efficiency.

25. The system of claim 22, wherein the at least two capacitive elements of the matching network comprise the tunable capacitor and two additional capacitors, wherein the tunable capacitor is in parallel with the at least one loop of conductive material relative to the two terminals, and wherein each of the two additional capacitors are in series with the at least one loop of conductive material relative to the two terminals.

26. The system of claim 25, wherein the at least two capacitive elements of the matching network further comprise a second capacitor in parallel with the at least one loop of conductive material relative to the two terminals.

27. The system of claim 25, wherein the two additional capacitors are tunable capacitors, the at least two capacitive elements of the matching network further comprise two fixed capacitors, and each of the two fixed capacitors are in series with the at least one loop of conductive material relative to the two terminals.

28. The system of claim 1, wherein the at least one device resonator is configured to wirelessly receive power via an oscillating magnetic field generated by a source resonator when the distance between the source resonator and the at least one device resonator is at least 5 cm, and the load of the television is configured to draw at least at least 10 Watts.

29. The system of claim 1, wherein the at least two capacitive elements of the matching network comprise:

at least one capacitor in series with the at least one loop of conductive material relative to the two terminals; and

at least one capacitor in parallel with the at least one loop of conductive material relative to the two terminals.

30. The system of claim 29, wherein the efficiency of wirelessly receiving power is at least 70%.

31. The system of claim 29, wherein the at least one capacitor in series comprises two capacitors in series with the at least one loop of conductive material relative to the two terminals.

32. The system of claim 31, wherein a first of the two capacitors in series is connected between the at least one loop of conductive material and a first of the two terminals, and a second of the two capacitors in series is connected between the at least one loop of conductive material and a second of the two terminals.

33. The system of claim 29, wherein the at least one capacitor in series comprises four capacitors in series with the at least one loop of conductive material relative to the two terminals.

34. The system of claim 29, wherein the at least one capacitor in parallel comprises two capacitors in parallel with the at least one loop of conductive material relative to the two terminals.

35. The system of claim 29, wherein the at least one capacitor in parallel comprises:

a tunable capacitor in parallel with the at least one loop of conductive material relative to the two terminals; and

a fixed capacitor in parallel with the at least one loop of conductive material relative to the two terminals.