US 12,451,733 B2
Wireless power receiving device, wireless power transmitting device, wireless earphone, LED device, and wireless power transmitting and receiving system
Katsuei Ichikawa, Tokyo (JP); Yasuo Yahagi, Tokyo (JP); and Hitoshi Akiyama, Kyoto (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Appl. No. 17/763,737
Filed by MAXELL, LTD., Tokyo (JP)
PCT Filed Sep. 26, 2019, PCT No. PCT/JP2019/037972
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/059453, PCT Pub. Date Apr. 1, 2021.
Prior Publication US 2022/0320910 A1, Oct. 6, 2022
Int. Cl. H02J 50/27 (2016.01); H02J 7/00 (2006.01); H02J 50/40 (2016.01); H04R 1/10 (2006.01); H05B 45/30 (2020.01)
CPC H02J 50/27 (2016.02) [H02J 7/00712 (2020.01); H02J 50/402 (2020.01); H04R 1/1016 (2013.01); H04R 1/1025 (2013.01); H04R 1/1041 (2013.01); H04R 2420/07 (2013.01); H05B 45/30 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A wireless power receiving device comprising:
an RFID responder;
a beacon signal oscillator which generates a beacon signal;
a power reception antenna;
an RFID-beacon changeover switch which is connected to each of the beacon signal oscillator, the RFID responder and the power reception antenna; and
a power reception side control circuit which performs switching control of the RFID-beacon changeover switch,
wherein the beacon signal oscillator is connected to a first input end of the RFID-beacon changeover switch,
the RFID responder is connected to a second input end of the RFID-beacon changeover switch,
the power reception antenna is connected to a first output end of the RFID-beacon changeover switch, and
in a case where there is no electric power for transmitting the beacon signal in the wireless power receiving device, the power reception side control circuit is configured to control to connect to a first system which connects the RFID responder with the power reception antennal and disconnects the beacon signal oscillator from the power reception antenna, and in a case where there is the electric power for transmitting the beacon signal in the wireless power receiving device, the power reception side control circuit is configured to control to connect to a second system which connects the beacon signal oscillator with the power reception antenna and disconnects the RFID responder from the power reception antenna.