公开(公告)号：US10938243B2

公开(公告)日：2021-03-02

申请号：US16328361

申请日：2017-08-22

Applicant: Samsung Electronics Co., Ltd.

Inventor： Dong Zo Kim ,  Kyoung Won Kim ,  Han Seok Park ,  Se Ho Park ,  Yu Su Kim ,  Keum Su Song ,  Ju Hyang Lee ,  Hyung Koo Chung ,  Kyung Min Park ,  Yong Sang Yun

IPC: H01F27/42 ,  H01F37/00 ,  H01F38/00 ,  H02J50/12 ,  H02J7/02 ,  H04B5/00

Abstract: A power transmitting unit is provided. The power transmitting unit includes a signal generator configured to generate a signal of a first frequency band for wireless charging, a power generation circuit configured to generate a modulation signal for modulating the signal of the first frequency band generated by the signal generator, and amplify a transmit power of the signal of the first frequency band based on voltage supplied from the outside of the power transmitting unit, a power transmission circuit configured to transmit the amplified transmit power to a power receiving unit via a first antenna, a second antenna configured to receive information about a charging state from the power receiving unit through a second frequency band, and a control circuit configured to control a duty and frequency of the modulation signal based on the charging state.