US 12,169,750 B2
Radio frequency identification for multi-device wireless chargers
Eric Heindel Goodchild, Phoenix, AZ (US)
Assigned to AIRA, INC., Phoenix, AZ (US)
Filed by AIRA, INC., Chandler, AZ (US)
Filed on Aug. 11, 2021, as Appl. No. 17/400,043.
Claims priority of provisional application 63/065,465, filed on Aug. 13, 2020.
Prior Publication US 2022/0051065 A1, Feb. 17, 2022
Int. Cl. H02J 50/12 (2016.01); G06K 19/07 (2006.01); H02J 50/80 (2016.01); H02J 50/90 (2016.01)
CPC G06K 19/0723 (2013.01) [H02J 50/12 (2016.02); H02J 50/80 (2016.02); H02J 50/90 (2016.02)] 13 Claims
OG exemplary drawing
 
1. A method for wireless charging, comprising:
transmitting an interrogation signal configured to stimulate radio frequency identification (RFID) tags through a first radio interface that is provided in a wireless charger;
refraining from participating in wireless charging when a response to the interrogation signal is received; and
negotiating a charging configuration when no response to the interrogation signal is received, wherein the interrogation signal is transmitted when a chargeable device is initially placed on or near a surface of the wireless charger;
wherein the interrogation signal is transmitted through an antenna that is configured as a loop surrounding one or more coils of the wireless charger, and
wherein the one or more coils are configured to receive a charging current when the wireless charger is charging the chargeable device.