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:
Feb. 22, 2022
Filed:
Jan. 10, 2020
Apple Inc., Cupertino, CA (US);
Wynand L. Malan, Auckland, NZ;
Zachary S. Harris, Auckland, NZ;
Apple Inc., Cupertino, CA (US);
Abstract
A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with a charging surface. The wireless power receiving device may be a portable electronic device receiving transmitted wireless power signals from the wireless power transmitting device while resting on the charging surface. During digital ping operations, low-power wireless power signals may be transmitted from the wireless power transmitting device. Information gathered during the digital ping such as wireless power transmission efficiency information, coupling coefficient information, Q-factor information, and coil inductance information may be used in determining whether a foreign object is present. Control circuitry in the transmitting device can cause the receiving device to present an alert for a user indicating that wireless power transfer operations are commencing in response to determining that no foreign object is present.