The present invention relates to a method for detecting foreign material, and an apparatus
and a system therefor, and a method for detecting foreign material in a wireless power …

In a power transmission device including a power transmission coil that is disposed to
oppose an installation surface of the power transmission device on which a power receiving …

Provided is a contactless electric power feeding system that allows a plurality of devices to
be recharged at the same time. A feeding device includes a primary feeding coil and each …

A method of controlling a wireless power transmitter is discussed. The method includes
transmitting a power signal having a predetermined strength; measuring a quality factor and …

In accordance with some embodiments of the present invention, a method of determining a
Q-factor in a transmit circuit with a resonant circuit includes setting a system voltage; …

In a wireless charging system, a power-transmitting node (TX), has a processor, a memory, a
power transmitter for transmitting power wirelessly to a power-receiving node (RX), and a …

BACKGROUND Wireless communication technologies, such as those used 15 for NFC or
ISO 14443 devices, communicate with each other via magnetic field induction in close …

Abstract Systems and methods to wirelessly transmit power are provided. A coil assembly is
provided. In some examples, the coil assembly is configured to generate a signal in …

In accordance with embodiments of the present invention, a wireless power transmitter
includes a transmit coil that includes a plurality of concentric coils; a switch circuit coupled to …

US11605979B2 - Power receiving device and electronic apparatus - Google Patents
US11605979B2 - Power receiving device and electronic apparatus - Google Patents Power …