| US 9,812,890 B1 | ||
| Portable wireless charging pad | ||
| Michael A. Leabman, San Ramon, CA (US); and Gregory Scott Brewer, Livermore, CA (US) | ||
| Assigned to Energous Corporation, San Jose, CA (US) | ||
| Filed by ENERGOUS CORPORATION, San Jose, CA (US) | ||
| Filed on Dec. 30, 2014, as Appl. No. 14/585,341. | ||
| Application 14/585,341 is a continuation in part of application No. 13/939,706, filed on Jul. 11, 2013, granted, now 9,143,000. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H02J 7/00 (2006.01); H02J 7/02 (2016.01) | ||
| CPC H02J 7/025 (2013.01) | 17 Claims |
| 1. A method for wireless charging, the method comprising:
receiving, by at least one receiver antenna of a near-field cordless charging pad, energy from a first pocket of energy formed
from constructive interference of a first plurality of power waves emitted from a first plurality of transmitter antennas
of a far-field wireless power transmitter that is distinct from the near-field cordless charging pad;
charging, using the energy received by the at least one receiver antenna from the first pocket of energy, a first battery
of the near-field cordless charging pad; and
transmitting, by a second plurality of transmitter antennas of the near-field cordless charging pad that is powered by the
first battery, a second plurality of power waves to constructively interfere to form a second pocket of energy at a receiver,
wherein the receiver is configured to convert energy of the second pocket of energy to charge a second battery of an electronic
device that is coupled with the receiver, wherein the near-field cordless charging pad is in proximity of the electronic device.
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