SYSTEM AND METHODS FOR USING SOUND WAVES TO WIRELESSLY DELIVER POWER TO ELECTRONIC DEVICES

• US 20190222070A1
• Filed: 12/18/2018
• Published: 07/18/2019
• Est. Priority Date: 05/01/2014
• Status: Active Grant

• Current Assignee: Energous Corporation
• Original Assignee: Energous Corporation
• Inventors: Leabman, Michael A.
• Granted Patent: US 10,516,301 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/15 using ultrasonic waves
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/30 using light, e.g. lasers
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

Wireless charging systems, and methods of use thereof, are disclosed herein. As an example, a method includes: receiving, by a radio of a transmitter, a communication signal from a wireless-power-receiving device, the communication signal containing location data indicating a location of the wireless-power-receiving device. The method further includes, in response determining that the location of the wireless-power-receiving device is within a predetermined range from the transmitter: (i) generating sound waves from a sound wave integrated circuit of the transmitter and (ii) transmitting the sound waves through a plurality of transducer elements to the location of the wireless-power-receiving device, wherein the sound waves are transmitted so that they converge constructively to form a controlled constructive interference pattern in three-dimensional (3-D) space at the location of the wireless-power-receiving device.

Claims

1. (canceled)

2. A method of wirelessly transmitting power using sound waves, comprising:

receiving, by a base station that is in communication with a plurality of wireless-power transmitters, data that is used to determine a location of and a power requirement for an electronic device coupled to a wireless-power receiver, wherein each of the plurality of wireless-power transmitters includes respective transducers for transmitting sound waves;

selecting, by the base station and based on the location of the electronic device, one or more of the plurality of wireless-power transmitters to transmit sound waves to the wireless-power receiver; and

sending, by the base station, an instruction to the one or more of the plurality of wireless-power transmitters to transmit a plurality of sound waves using respective transducers, the plurality of sound waves forming a pocket of energy proximate to the electronic device, wherein the wireless-power receiver converts energy from the plurality of sounds waves that form the pocket of energy into usable power to provide power or charge to the electronic device.

3. The method of claim 2, further comprising:

controlling, by the base station, each of the plurality of transmitters to deliver a pocket of energy at a determined time and location to charge the electronic device through the wireless-power receiver.

4. The method of claim 2, further comprising:

determining, by the base station, if the electronic device is located beyond a first predetermined threshold range of distance; and

in accordance with a determination that the electronic device is located beyond the first predetermined threshold, controlling, by the base station, one or more range enhancer devices, to deliver a pocket of energy to the wireless-power receiver coupled to the electronic device.

5. The method of claim 4, wherein the one or more range enhancer devices includes at least one of a reflector device, or a wireless repeater device.

6. The method of claim 5, wherein at least one range enhancer device is configured to receive and amplify a sound wave before retransmitting the sound wave.

7. The method of claim 4, further comprising:

tracing, by the base station, a trajectory for sound waves using a subset of the one or more range enhancer devices in addition to determining the subset of the one or more range enhancer devices to optimally deliver power to the electronic device.

8. The method of claim 2, further comprising:

updating, by the base station, locations of one or more electronic devices after the one or more electronic devices communicated a power requirement.

9. The method of claim 2, further comprising:

determining, by the base station, priority among a plurality of electronic devices to receive, through the at least one receiver, the pocket of energy from at least one of the plurality of transmitters.

10. The method of claim 2, further comprising:

communicating, by the base station, with the wireless-power receiver and the plurality of transmitters through a communication signal using a protocol selected from the group consisting of Bluetooth®

, Wi-Fi®

, ZigBee®

, or FM radio.

11. The method of claim 2, wherein the plurality of transmitters and the wireless-power receiver are situated in various rooms or locations within a physical building.

12. The method of claim 2, wherein each transmitter is configured to transmit sound waves at a corresponding frequency, power intensity, and amplitude, and the method further comprises, controlling, by the base station, each transmitter of the plurality of transmitters to transmit sound waves at its corresponding frequency, power intensity, and amplitude.

13. A wireless charging apparatus comprising:

a base station coupled to a power source; and

a first communication component coupled to the base station and configured to transmit information to a plurality of transmitters and a plurality of receivers, each of the plurality of transmitters comprising;

an antenna configured to transmit sound waves that converge to become a pocket of energy; and

a second communication component configured to communicate with the base station and at least one of the plurality of receivers.

14. The apparatus of claim 13, wherein the plurality of transmitters are situated in a plurality of locations inside a defined structure and are connected to the base station through one or more of a coaxial cable, a phone cable, a LAN cable, a wireless connection, and combinations thereof.

15. The apparatus of claim 13, wherein the base station is coupled to a digital signal processor configured to control a plurality of functionalities associated with the plurality of transmitters, the plurality of functionalities including one or more of timing of transmission of the power transmission waves, a direction of transmission of the power transmission waves, and an intensity of the pocket of energy.

16. The apparatus of claim 13, wherein the base station is configured to receive information from at least one of the plurality of receivers, the information including an identification, a location, and an indication of the power level of at least one of the plurality of electronic devices associated with the at least one of the plurality of receivers.

17. The apparatus of claim 13, wherein the base station, the plurality of transmitters, and the plurality of receivers are configured to communicate using a protocol selected from the group consisting of Bluetooth®

, Wi-Fi®

, ZigBee®

, or FM radio.

18. The apparatus of claim 13, further comprising one or more range enhancer devices, each range enhancer device configured to either reflect or repeat sound waves received from the plurality of transmitters.

19. The apparatus of claim 18, wherein each range enhancer device is located beyond a second predetermined threshold range of distance from the base station.

20. The apparatus of claim 18, wherein the one or more range enhancer devices includes at least one of a reflector device, or a wireless repeater device.

21. The apparatus of claim 18, wherein the base station is configured to trace a trajectory for sound waves using a subset of the one or more range enhancer devices to deliver power to the at least one of the plurality of receivers.