IP Library › Granted Patent US 12,272,986
Granted Patent B2
US 12,272,986 · App. 18/318,660 · Granted Apr 8, 2025

Near-field wireless power transmission techniques

Inventors: Michael A. Leabman (San Ramon, CA); Alister Hosseini (Phoenix, AZ)
Assignee: ENERGOUS CORPORATION
H02J7/04H02J50/10H02J50/23H04B1/3883H04W8/005H02J7/0013H02J7/0042H02J2310/22
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Quick Facts
Patent No.
US 12,272,986
App. No.
18/318,660
Granted
Apr 8, 2025
Kind
B2
Abstract

Disclosed is a wireless power transmitter for wirelessly delivering power to a receiver device, the wireless power transmitter including: a plurality of unit cells configured to radiate one or more radio frequency (RF) power transmission waves, each unit cell in the plurality of unit cells including: (i) a metal portion having an interior perimeter that surrounds an aperture defined by the metal portion; and (ii) an antenna that is aligned with the aperture in a first dimension, the antenna being configured to radiate one or more RF power transmission waves for wirelessly charging a receiver device. The one or more RF power transmission waves leak from the wireless power transmitter at least in part through the aperture when the receiver device is positioned within a threshold distance from the unit cell.

Claims (50)

1. A wireless-power receiver, comprising:

a near-field antenna configured to receive and/or transmit near-field radio frequency (RF) energy;

a far-field antenna configured to receive and/or transmit far-field RF energy; and

a communications component configured to receive and/or transmit a communication signal including a charging request;

wherein the wireless-power receiver is configured to:

upon receiving a first charging request from another wireless-power receiver, present a user interface including respective elements for accepting or declining the first charging request;

in response to a user input accepting the first charging request, transmit near-field RF energy or far-field RF energy to the other wireless-power receiver;

present, via the user interface, another element for transmitting a second charging request to the other wireless-power receiver or a wireless-power transmitter; and

responsive to acceptance of the second charging request, receive near-field RF energy and/or far-field RF energy from the other wireless-power receiver and/or the wireless-power transmitter.

2. The wireless-power receiver of claim 1 , wherein the first charging request includes a location of the other wireless-power receiver, and the wireless-power receiver is further configured to:

determine whether the other wireless-power receiver is within a near-field transmission threshold distance;

in accordance with a determination that the other wireless-power receiver is within the near-field transmission threshold distance, transmit near-field RF energy to the other wireless-power receiver;

determine whether the other wireless-power receiver is within a far-field transmission threshold distance; and

in accordance with a determination that the other wireless-power receiver is within the far-field transmission threshold distance, transmit far-field RF energy to the other wireless-power receiver.

3. The wireless-power receiver of claim 2 , wherein the near-field transmission threshold distance is 10 mm and the far-field transmission threshold distance is 12 in.

4. The wireless-power receiver of claim 1 , wherein the wireless-power receiver is a first wireless-power receiver and the other wireless-power receiver is a second wireless-power receiver, and the first wireless-power receiver is further configured to:

while receiving near-field RF energy and/or far-field RF energy from the second wireless-power receiver and/or the wireless-power transmitter, receive a third charging request from a third wireless-power receiver; and

responsive to receiving the third charging request, transmit near-field RF energy or far-field RF energy to the third wireless-power receiver.

5. The wireless-power receiver of claim 1 , wherein the wireless-power receiver is configured to convert the near-field RF energy and/or the far-field RF energy received from the other wireless-power receiver and/or the wireless-power transmitter into electrical energy for charging a battery of an electronic device coupled to the wireless-power receiver or for powering the electronic device.

6. The wireless-power receiver of claim 5 , wherein the wireless-power receiver is configured to simultaneously receive near-field RF energy and/or the far-field RF energy from the other wireless-power receiver and the wireless-power transmitter.

7. The wireless-power receiver of claim 1 , wherein the user interface including respective elements for accepting or declining the first charging request, includes one or more respective elements for request additional information including one or more of information on a user of the other wireless-power receiver, details of the other wireless-power receiver, battery charge of the other wireless-power receiver, and current location of the other wireless-power receiver.

8. The wireless-power receiver of claim 1 , wherein the wireless-power receiver is further configured to while receiving near-field RF energy from the wireless-power transmitter, responsive to receiving the first charging request, transmit near-field RF energy or far-field RF energy to the other wireless-power receiver.

9. The wireless-power receiver of claim 1 , wherein the wireless-power receiver is further configured to while receiving far-field RF energy from the wireless-power transmitter, responsive to receiving the first charging request, transmit near-field RF energy or far-field RF energy to the other wireless-power receiver.

10. The wireless-power receiver of claim 1 , wherein each charging request includes one or more of location information, a battery level, effectiveness of the received power, and device information.

11. The wireless-power receiver of claim 1 , wherein the wireless-power receiver is configured to determine one or more parameters for the near-field RF energy or far-field RF energy based at least in part on the first charging request received from the other wireless-power receiver.

12. A method of wirelessly transferring power, the method comprising:

at a wireless-power receiver comprising a near-field antenna configured to receive and/or transmit near-field radio frequency (RF) energy, a far-field antenna configured to receive and/or transmit far-field RF energy, and a communications component configured to receive and/or transmit a communication signal including a charging request:

upon receiving a first charging request from another wireless-power receiver, presenting a user interface including respective elements for accepting or declining the first charging request;

in response to a user input accepting the first charging request, transmitting near-field RF energy or far-field RF energy to the other wireless-power receiver;

presenting, via the user interface, another element for transmitting a second charging request to the other wireless-power receiver or a wireless-power transmitter; and

responsive to acceptance of the second charging request, receiving near-field RF energy and/or far-field RF energy from the other wireless-power receiver and/or the wireless-power transmitter.

13. The method of claim 12 , wherein the first charging request includes a location of the other wireless-power receiver, and the method further comprises:

determining whether the other wireless-power receiver is within a near-field transmission threshold distance;

in accordance with a determination that the other wireless-power receiver is within the near-field transmission threshold distance, transmitting near-field RF energy to the other wireless-power receiver;

determining whether the other wireless-power receiver is within a far-field transmission threshold distance; and

in accordance with a determination that the other wireless-power receiver is within the far-field transmission threshold distance, transmitting far-field RF energy to the other wireless-power receiver.

14. The method of claim 13 , wherein the near-field transmission threshold distance is 10 mm and the far-field transmission threshold distance is 12 in.

15. The method of claim 12 , wherein the wireless-power receiver is a first wireless-power receiver and the other wireless-power receiver is a second wireless-power receiver, and the method further comprises:

while receiving near-field RF energy and/or far-field RF energy from the second wireless-power receiver and/or the wireless-power transmitter, receiving a third charging request from a third wireless-power receiver; and

responsive to receiving the third charging request, transmitting near-field RF energy or far-field RF energy to the third wireless-power receiver.

16. The method of claim 12 , wherein the wireless-power receiver is configured to simultaneously receive near-field RF energy and/or the far-field RF energy from the other wireless-power receiver and the wireless-power transmitter.

17. The method of claim 12 , wherein the user interface including respective elements for accepting or declining the first charging request, includes one or more respective elements for request additional information including one or more of information on a user of the other wireless-power receiver, details of the other wireless-power receiver, battery charge of the other wireless-power receiver, and current location of the other wireless-power receiver.

18. The method of claim 12 , wherein the wireless-power receiver is further configured to while receiving near-field RF energy from the wireless-power transmitter, responsive to receiving the first charging request, transmit near-field RF energy or far-field RF energy to the other wireless-power receiver.

19. The method of claim 12 , wherein the wireless-power receiver is further configured to while receiving far-field RF energy from the wireless-power transmitter, responsive to receiving the first charging request, transmit near-field RF energy or far-field RF energy to the other wireless-power receiver.

20. A non-transitory computer-readable storage medium storing executable instructions that, when executed by one or more processors that are in communication with a wireless-power receiver, cause the wireless-power receiver to:

receive, via a communications component, a first charging request from another wireless-power receiver;

in response to the first charging request from the other wireless-power receiver, present a user interface including respective elements for accepting or declining the first charging request;

in response to a user input accepting the first charging request, transmit near-field RF energy, via a near-field antenna, or far-field RF energy, via a far-field antenna, to the other wireless-power receiver;

present, via the user interface, another element for transmitting, via the communications component, a second charging request to the other wireless-power receiver or a wireless-power transmitter; and

responsive to acceptance of the second charging request, receive near-field RF energy, via the near-field antenna, and/or far-field RF energy, via the far-field antenna, from the other wireless-power receiver and/or the wireless-power transmitter.

Continuity (7)
Continuation 17210398 · Mar 23, 2021
Continuation 16726753 · Dec 24, 2019
Continuation 16051336 · Jul 31, 2018
Continuation 15047831 · Feb 19, 2016
Provisional Application 62271837 · Dec 28, 2015
Provisional Application 62387465 · Dec 24, 2015
Related Publication 20240030739A1 · Jan 25, 2024
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