Search International and National Patent Collections

1. (WO2018184583) DEVICE TO BE CHARGED, WIRELESS CHARGING APPARATUS, WIRELESS CHARGING METHOD AND SYSTEM

Pub. No.:    WO/2018/184583    International Application No.:    PCT/CN2018/082011
Publication Date: Fri Oct 12 01:59:59 CEST 2018 International Filing Date: Thu Apr 05 01:59:59 CEST 2018
IPC: H02J 7/00
Applicants: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
OPPO广东移动通信有限公司
Inventors: WAN, Shiming
万世铭
Title: DEVICE TO BE CHARGED, WIRELESS CHARGING APPARATUS, WIRELESS CHARGING METHOD AND SYSTEM
Abstract:
A device to be charged, a wireless charging apparatus, a wireless charging method and a system. The wireless charging apparatus (200) comprises: a voltage conversion circuit (203), used for receiving an input voltage, converting the input voltage, and obtaining an output voltage and an output current of the voltage conversion circuit; a wireless transmission circuit (201), used for transmitting an electromagnetic signal according to the output voltage and the output current of the voltage conversion circuit, so as to perform wireless charging on a device to be charged; a first control circuit (202), used for performing wireless communication with the device to be charged during the wireless charging, obtaining an output voltage and/or an output current of a step-down circuit (303) fed back by the device to be charged, and adjusting the output voltage and/or the output current of the voltage conversion circuit according to the output voltage and/or the output current of the step-down circuit, so as to adjust the transmission power of the electromagnetic signal, and thereby enable the voltage difference between an input voltage and the output voltage of the step-down circuit to satisfy a preset condition. The device to be charged, the wireless charging apparatus, the wireless charging method and the system reduce heat generation during wireless charging.