Huawei Technologies Co., Limited

Qitang Liu

Weiliang Shu

Yanding Liu

Xiaosheng Zeng

Pinghua Wang

Yunhe Mao

Yong Cao

Shuangquan Chen

Chengbin Ma

Furong Xiao

Wingto Fan

Hongcheng You

Shuangke Liu

A wireless charging apparatus includes a receive end coil, a switch selection circuit, a plurality of charging circuits, and a receive end controller. An input end of the switch selection circuit is connected to an output end of the receive end coil, and an output end of the switch selection circuit is connected to an input end of each of the charging circuits.

Wireless charging apparatus and terminal using same

A power regulation method, apparatus, and device for NFC communication and NFC charging are disclosed. The apparatus includes: an NFC power converter, an NFC coil, an NFC circuit, a controller, and a power regulator. The NFC power converter is configured to connect to a direct-current power supply and generate a high-frequency alternating-current output. The NFC coil is configured to generate/receive an NFC high-frequency magnetic field and transmit/receive NFC power or an NFC signal. The NFC circuit is connected to the NFC power converter and is configured to transmit/receive the high-frequency alternating-current output. The controller is configured to generate different power control signals based on different operating modes of an NFC apparatus.

Power regulation method, apparatus, and device for near field communication

The technology of this disclosure relates to a wireless charging alignment method and apparatus, a wireless charging system, and an electric vehicle, and belongs to the field of wireless charging. In the wireless charging alignment apparatus, a first detection circuit may detect a first induction signal of a power receive coil in a positioning magnetic field generated by a power transmit coil; a second detection circuit may detect a second induction signal of a location detection coil in the positioning magnetic field; and a location determining circuit may determine a location of the power receive coil relative to the power transmit coil based on the first induction signal and the second induction signal.

Wireless charging alignment method and apparatus, wireless charging system, and electric vehicle

A terminal device and a method for controlling the terminal device are provided. The terminal device includes a display screen, a housing, a middle frame and a transmitting circuit. The transmitting circuit is disposed on a side of the middle frame and faces the housing. The transmitting circuit includes a matching network and a transmitting coil connected to the matching network. The matching network is configured to perform impedance matching on a received alternating current power signal and send the received alternating current power signal to the transmitting coil. The matching network includes a parallel resonant capacitor connected in parallel to the transmitting coil. The transmitting circuit further includes a resistance switching circuit connected in series to the parallel resonant capacitor.

Terminal device and method for controlling terminal device

This application provides a wireless charger and a control method. The wireless charger includes a class-E power amplifier and a tunable impedance circuit that is connected to an output end of the class-E power amplifier. The class-E power amplifier includes a switching transistor and a tunable capacitance circuit that is parallelly connected to the switching transistor. The wireless charger further includes a control unit, configured to obtain a constraint condition of the class-E power amplifier; determine N1 target equivalent load impedances of the class-E power amplifier based on the constraint condition; and adjust a capacitance value of the tunable capacitance circuit in the class-E power amplifier, and adjust an impedance value of the tunable impedance circuit, to enable an equivalent load impedance of the class-E power amplifier to match one of the N1 target equivalent load impedances.

Growing community of inventors

Shenzhen, China

Qitang Liu