Receiver devices configured to determine location within a transmission field

• US 10,523,033 B2
• Filed: 09/22/2015
• Issued: 12/31/2019
• Est. Priority Date: 09/15/2015
• Status: Active Grant

• Current Assignee: Energous Corporation
• Original Assignee: Energous Corporation
• Inventors: Leabman, Michael A.
• Primary Examiner(s): Tran, Thienvu V
• Assistant Examiner(s): Baxter, Brian K
• Application Number:
  US14/860,824
• Publication Number:
  US 20170085112A1
• Time in Patent Office: 1,561 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/23 characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
• 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: 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 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

Embodiments disclosed herein may generate and transmit power waves that, as result of their physical waveform characteristics (e.g., frequency, amplitude, phase, gain, direction), converge at a predetermined location in a transmission field to generate a pocket of energy. Receivers associated with an electronic device being powered by the wireless charging system, may extract energy from these pockets of energy and then convert that energy into usable electric power for the electronic device associated with a receiver. The pockets of energy may manifest as a three-dimensional field (e.g., transmission field) where energy may be harvested by a receiver positioned within or nearby the pocket of energy.

Claims

1. A computer-implemented method comprising:

receiving, by a receiver device, from a transmitter device, an exploratory power wave and a communications signal requesting a feedback communications signal based upon the exploratory power wave, the feedback communications signal indicating waveform characteristics of the exploratory power wave, wherein the communications signal is transmitted along a first axis from the transmitter device to the receiver device;

deriving, by the receiver device, a location of the receiver device based at least in part upon the waveform characteristics of the exploratory power wave;

transmitting, by the receiver device, the feedback communications signal containing data indicating the location of the receiver device relative to the transmitter device within a transmission field, wherein the data contained in the feedback communications signal causes the transmitter device to transmit a second communications signal to the receiver device along a second axis that is distinct from the first axis;

receiving, by the receiver device, a second exploratory power wave and the second communications signal requesting a second feedback communications signal based upon the second exploratory power wave; and

transmitting, by the receiver device, the second feedback communications signal containing data indicating a comparatively more granular location of the receiver device relative to the transmitter device within the transmission field.

2. The method according to claim 1, further comprising receiving, by the receiver device, one or more power waves having comparatively greater energy than the exploratory power wave.

3. The method according to claim 2, further comprising receiving, by the receiver device, one or more communications signals indicating one or more parameters used for generating the one or more power waves.

4. The method according to claim 3, further comprising:

identifying, by the receiver device, an amount of power received from the one or more power waves;

identifying, by the receiver device, an amount of power transmitted in the one or more power waves, as indicated in the communications signal; and

determining, by the receiver device, an efficiency ratio based on the amount of power received from the one or more power waves, as compared to the amount of power transmitted.

5. The method according to claim 4, further comprising transmitting, by the receiver device, a power level feedback message indicating the efficiency ratio.

6. The method according to claim 4, further comprising transmitting, by the receiver device, a movement feedback message indicating a change in the efficiency ratio based upon displacement of the receiver device within the transmission field.

7. The method according to claim 4, further comprising determining, by the receiver device, a suggested location among a plurality of pockets of energy generated by a plurality of sets of one or more power waves, the suggested location based upon the efficiency ratio.

8. The method according to claim 1, wherein the receiver device transmits a plurality of feedback communications signals in response to receiving a plurality of exploratory power waves, wherein the receiver device receives at least one exploratory power wave for each planar coordinate.

9. The method according to claim 1, further comprising storing, by the receiver device, the location of the receiver in a non-transitory machine-readable storage media.

10. The method according to claim 1, wherein the communications signal contains a set of one or more transmission parameters indicating the one or more characteristics of the exploratory power wave.

11. The method according to claim 10, wherein the feedback communications signal contains one or more updated parameters indicating one or more updated characteristics of the exploratory power wave.

12. The method according to claim 10, wherein a parameter is selected from the group consisting of:

electric device battery level, electric device power level needed, x-coordinate, y-coordinate, z-coordinate, elevation, and azimuth.

13. The method according to claim 12, wherein a characteristic is selected from the group consisting of:

amplitude, phase, gain, amount of energy, and frequency.

14. The method according to claim 1, wherein the communications signal is transmitted using a wireless communication protocol.

15. The method of claim 1, wherein the location of the receiver device is a first location, receiving the second exploratory power wave and the second communications signal further comprises deriving a second location of the receiver device based at least in part upon the waveform characteristics of the exploratory power wave wherein the second location is more precise than the first location.

16. The method of claim 1, wherein the data in the second feedback communications signal causes the transmitter device to transmit a further communications signal to the receiver device along a third axis that is distinct from the first and second axes.

17. A receiver device comprising:

an antenna array comprising one or more antennas, a respective antenna of the one or more antennas configured to receive one or more power waves and capture energy from the one or more power waves;

a communications component configured to receive one or more communications signals from a transmitter device; and

a receiver processor executing instructions to;

upon receiving from a transmitter device an exploratory power wave and a communications signal requesting a feedback communications signal based upon the exploratory power wave, the feedback communications signal indicating waveform characteristics of the exploratory power wave, wherein the communications signal is transmitted along a first axis from the transmitter device to the receiver device;

deriving, by the receiver device, a location of the receiver device based at least in part upon the waveform characteristics of the exploratory power wave;

transmit the feedback communications signal containing data indicating the location of the receiver device relative to the transmitter device within a transmission field, wherein the data contained in the feedback communications signal causes the transmitter device to transmit a second communications signal along a second axis that is distinct from the first axis from the transmitter device to the receiver device;

receive a second exploratory power wave and the second communications signal requesting a second feedback communications signal based upon the second exploratory power wave; and

transmit the second feedback communications signal containing data indicating a comparatively more granular location of the receiver device relative to the transmitter device within the transmission field.

18. The receiver device according to claim 17, wherein the receiver processor is further configured to determine the location of the receiver device relative to the transmitter device, based upon an amount of energy received from the exploratory power wave and one or more waveform characteristics of the exploratory power wave.

19. The receiver device according to claim 18, wherein the receiver device comprises a user interface configured to display a location of one or more pockets of energy relative to the location of the receiver device.

20. The receiver device according to claim 17, wherein the receiver device is further configured to receive one or more power waves having comparatively greater energy than the exploratory power wave.

21. The receiver device according to claim 20, wherein the receiver device is further configured to receive one or more communications signals indicating one or more parameters used for generating the one or more power waves.

22. The receiver device according to claim 21, the receiver device further configured to:

identify an amount of power received from the one or more power waves;

identify an amount of power transmitted in the one or more power waves, as indicated in the communications signal; and

identify an efficiency ratio based on the amount of power received from the one or more power waves, as compared to the amount of power transmitted.

23. The receiver device according to claim 17, wherein the data in the second feedback communications signal causes the transmitter device to transmit a further communications signal to the receiver device along a third axis that is distinct from the first and second axes.