The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2022
Filed:
Jan. 30, 2020
Aira, Inc., Chandler, AZ (US);
William Paul Abajian, Napa, CA (US);
Jules Marie Xavier Laffitte, San Mateo, CA (US);
John MacDonald, San Francisco, CA (US);
Viswajit Natarajan, San Jose, CA (US);
Lixin Shi, Redwood City, CA (US);
Jake Lee Vander Ploeg, San Francisco, CA (US);
Xiaoping Zhu, Moraga, CA (US);
AIRA, INC., Chandler, AZ (US);
Abstract
A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. One of the feedback channels may be a voltage and/or current measurement of coil driving signals from the coils that are indicative of receiver device presences on the wireless charging system. A coil driving signal may be sampled and processed using discrete Fourier transform to determine amplitude and phase information of the signal.