US 12,308,668 B2
Wireless power receiving apparatus for carrying out in-band communication with wireless power transmitting apparatus and method for carrying out in-band communication in wireless power receiving apparatus
Hangseok Choi, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 19, 2023, as Appl. No. 18/469,784.
Application 18/469,784 is a continuation of application No. PCT/KR2022/003462, filed on Mar. 11, 2022.
Claims priority of application No. 10-2021-0039974 (KR), filed on Mar. 26, 2021.
Prior Publication US 2024/0014693 A1, Jan. 11, 2024
Int. Cl. H02J 50/80 (2016.01); H02J 50/12 (2016.01); H04B 5/79 (2024.01)
CPC H02J 50/80 (2016.02) [H02J 50/12 (2016.02); H04B 5/79 (2024.01)] 19 Claims
OG exemplary drawing
 
1. A wireless power reception device comprising:
a resonance circuit configured to receive wireless power from a wireless power transmission device;
a plurality of first capacitors;
a plurality of first switches;
a plurality of second capacitors;
a plurality of second switches;
a rectification circuit connected to a first end and a second end of the resonance circuit; and
a control circuit connected to the rectification circuit,
wherein each of first ends of the plurality of first capacitors is connected to the first end of the resonance circuit, second ends of the plurality of first capacitors are respectively connected to first ends of the plurality of first switches, and second ends of the plurality of first switches are connected to a ground,
wherein each of first ends of the plurality of second capacitors is connected to the second end of the resonance circuit, second ends of the plurality of second capacitors are respectively connected to first ends of the plurality of second switches, and second ends of the plurality of second switches are connected to the ground, and
wherein the control circuit is configured to:
select switches for modulating data to be transmitted to the wireless power transmission device among the plurality of first switches and the plurality of second switches based on a control error packet (CEP) value identified based on an output voltage of the rectification circuit of the wireless power reception device, the CEP value being based on a scaled difference between a target output voltage of the rectification circuit and an actual output voltage of the rectification circuit, and
control on/off switching of the selected switches to modulate the data to transmit to the wireless power transmission device,
wherein a first subset of the plurality of first switches and the plurality of second switches is selected when the CEP value is smaller than a first threshold and a different, second subset of the plurality of first switches and the plurality of second switches is selected when the CEP value is greater than or equal to the first threshold.