US 12,444,980 B2
Wireless charging at substantially uniform charge rate for different physical charge configurations
Hanming Zu, Redmond, WA (US); Daniel Dhondt, Sammamish, WA (US); Casey Callan, Seattle, WA (US); and Xin Huang, Sammamish, WA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on May 17, 2022, as Appl. No. 17/746,089.
Claims priority of provisional application 63/321,358, filed on Mar. 18, 2022.
Prior Publication US 2023/0299614 A1, Sep. 21, 2023
Int. Cl. H02J 50/10 (2016.01); H02J 50/00 (2016.01); H02J 50/70 (2016.01)
CPC H02J 50/10 (2016.02) [H02J 50/005 (2020.01); H02J 50/70 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A wireless charging system comprising:
a receiving coil positioned within a planar wireless accessory; and
a transmitting coil positioned within a planar electronic device that generates a magnetic flux received by the receiving coil to charge a battery of the planar wireless accessory when the planar wireless accessory is positioned relative to the planar electronic device according to a select charging configuration of multiple user-selectable charging configurations, the transmitting coil and the receiving coil being shaped and positioned to charge the battery at a substantially uniform rate across the multiple user-selectable charging configurations.