US 12,081,034 B2
Wireless charging device
Beomwoo Gu, Suwon-si (KR); Sungbum Park, Suwon-si (KR); Jaehyun Park, Suwon-si (KR); Kangho Byun, Suwon-si (KR); and Sungku Yeo, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Appl. No. 17/276,743
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
PCT Filed Sep. 17, 2019, PCT No. PCT/KR2019/011977
§ 371(c)(1), (2) Date Mar. 16, 2021,
PCT Pub. No. WO2020/060142, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 10-2018-0111794 (KR), filed on Sep. 18, 2018.
Prior Publication US 2022/0045549 A1, Feb. 10, 2022
Int. Cl. H02J 50/00 (2016.01); H01F 38/14 (2006.01); H02J 7/00 (2006.01); H02J 50/10 (2016.01); H02J 50/40 (2016.01); H02J 50/80 (2016.01); H04B 5/26 (2024.01); H04B 5/79 (2024.01)
CPC H02J 50/005 (2020.01) [H01F 38/14 (2013.01); H02J 7/0044 (2013.01); H02J 50/10 (2016.02); H02J 50/402 (2020.01); H04B 5/26 (2024.01); H04B 5/79 (2024.01); H02J 50/80 (2016.02); H02J 2310/22 (2020.01)] 13 Claims
OG exemplary drawing
 
1. A wireless charging device comprising:
a wireless charging device body; and
a wireless power transmitter disposed in the wireless charging device body to face a wireless power receiver provided in an external electronic device when the external electronic device is coupled to the wireless charging device body,
wherein the wireless power transmitter comprises:
at least one transmission coil having a ring shape; and
a transmission magnetic body surrounding the at least one transmission coil and disposed in the wireless charging device body so as to face a reception magnetic body provided in the wireless power receiver when the external electronic device is coupled to the wireless charging device body,
wherein an inner circumferential surface of the wireless power transmitter faces an inner surface of the wireless charging device body,
wherein, when the external electronic device is coupled to the wireless charging device body, an outer circumferential surface of the wireless power receiver and the inner circumferential surface of the wireless power transmitter face each other,
wherein the transmission magnetic body has a toroidal structure which has a U shape or horseshoe shape cross section perpendicular to a direction in which the at least one transmission coil is extended, and includes a first opened side corresponding to a second opened side of the reception magnetic body which has a toroidal structure, and wherein the transmission magnetic body is configured such that the first opened side and the second opened side face each other when the external electronic device coupled to the wireless charging device body, and
wherein a current is applied to the transmission coil when the external electronic device is coupled to the wireless charging device body and generates an electromagnetic field for inducing electric power in a reception coil.