US 12,170,445 B2
Wireless charging system for wearable devices
Baifeng Chen, San Jose, CA (US)
Assigned to Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed by Meta Platforms Technologies, LLC, Menlo Park, CA (US)
Filed on Mar. 16, 2023, as Appl. No. 18/122,480.
Prior Publication US 2024/0313580 A1, Sep. 19, 2024
Int. Cl. H02J 50/10 (2016.01); H02J 50/40 (2016.01); H02M 3/07 (2006.01); H02M 3/24 (2006.01)
CPC H02J 50/10 (2016.02) [H02J 50/40 (2016.02); H02M 3/07 (2013.01); H02M 3/24 (2013.01); H02J 2207/20 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A wireless charging system for a wearable device, comprising:
a first transmitter comprising:
a first converter coupled to a direct current (DC) power source, and
a first transmitter coil coupled to the first converter, the first transmitter coil to generate a first charging voltage for the wearable device via a first magnetic induction with a receiver coil;
a second transmitter comprising:
a second converter coupled to the DC power source, and
a second transmitter coil coupled to the second converter, the second transmitter coil to generate a second charging voltage for the wearable device via a second magnetic induction with the receiver coil; and
at least one receiver comprising:
the receiver coil to magnetically couple with the first transmitter coil of the first transmitter and the second transmitter coil of the second transmitter;
a rectifier coupled to the receiver coil;
a voltage limiter coupled to the rectifier; and
a charger coupled to the voltage limiter and a battery of the wearable device.