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:
Dec. 06, 2022
Filed:
Sep. 12, 2017
Applicant:
Nxp Usa, Inc., Austin, TX (US);
Assignee:
NXP USA, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 50/60 (2016.01); H02J 50/90 (2016.01); H02J 50/80 (2016.01); H02J 50/12 (2016.01); H03K 5/156 (2006.01); H02J 50/10 (2016.01); H02J 50/20 (2016.01);
U.S. Cl.
CPC ...
H02J 50/60 (2016.02); H02J 50/12 (2016.02); H02J 50/80 (2016.02); H02J 50/90 (2016.02); H03K 5/156 (2013.01); H02J 50/10 (2016.02); H02J 50/20 (2016.02);
Abstract
A method for detecting objects in a charging area of a wireless charging transmitter includes providing a bridge circuit that generates a ping signal, and providing the ping signal to a transmitter terminal. The method further includes monitoring at least one of a current of a power supply connected to the bridge circuit, and a current at the transmitter terminal to determine if an eligible object is in the charging area. The ping signal has parameters including frequency, duty cycle, and phase shift angle, where at least one of these parameters varies with time.