US 12,334,752 B2
Amplitude shift key modulation for multi-device wireless chargers
Eric Heindel Goodchild, Phoenix, AZ (US); and John Winters, Chandler, AZ (US)
Assigned to AIRA, INC., Phoenix, AZ (US)
Filed by AIRA, INC., Phoenix, AZ (US)
Filed on Dec. 4, 2023, as Appl. No. 18/528,715.
Application 18/528,715 is a continuation of application No. 17/140,977, filed on Jan. 4, 2021, granted, now 11,837,882.
Claims priority of provisional application 62/957,436, filed on Jan. 6, 2020.
Prior Publication US 2024/0223017 A1, Jul. 4, 2024
Int. Cl. H02J 7/00 (2006.01); H02J 50/12 (2016.01); H02J 50/40 (2016.01); H02J 50/80 (2016.01)
CPC H02J 50/402 (2020.01) [H02J 50/12 (2016.02); H02J 50/80 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A method for communicating with a device being charged, comprising:
providing charging currents to a plurality of transmitting coils provided in a wireless charging device;
receiving a first modulated signal from a first power receiving device that receives a first charging current through at least one of the plurality of transmitting coils while the first power receiving device is receiving the first charging current, the first modulated signal including a carrier signal provided at a frequency corresponding to the frequency of the first charging current; and
causing a band-pass filter to filter the first modulated signal by blocking a second modulated signal received from a second power receiving device that receives a second charging current through the plurality of transmitting coils, wherein the first charging current and the second charging current are provided at different frequencies from one another.