According to embodiments, a wireless charging coil and an electronic device including the same are provided. The electronic device may include a battery; a wireless charging coil; a wireless charging circuit configured to wirelessly transmit and/or receive power using the wireless charging coil; and a processor electrically connected to the battery, the wireless charging coil, and the wireless charging circuit, wherein based on another electronic device being positioned within a specified transmission and/or reception distance of the electronic device, the processor is configured to control the electronic device to transmit power stored in the battery to the other electronic device using the wireless charging coil and the wireless charging circuit. Therefore, the electronic device can wirelessly charge another electronic device, a watch, and an earbud in which the remaining battery capacity is insufficient.

An electronic device comprising: a body having a first portion and a second portion located below the first portion, wherein a bottom surface of the first portion and a side surface of the second portion forms an opening under the bottom surface of the first portion, wherein at least one portion of an electrode is disposed on the bottom surface of the first portion of the body, and at least one portion of the second portion of the body is disposed in an opening of a circuit board with the electrode being disposed on and electrically connected with the circuit board.

The present disclosure provides a wireless charging coil, and the wireless charging coil comprises a first coil layer, a second coil layer and a first magnetic material. The second coil layer is stacked in parallel on a surface of the first coil layer to form a stacked structure, and it has a winding path identical to a winding path of the first coil layer. The first magnetic material is disposed on one side of the first coil layer and has a winding path which is different from the winding path of the first coil layer and with said side away from the second coil layer. Currents generated by a power source are evenly distributed in the stack structure to reduce a skin effect when the wireless charging coil is electrically connected to the power source.

A coil module includes a coil assembly, a first induction substrate, a second induction substrate and an adhesive element. The coil assembly has a winding axis. The coil assembly is disposed on the first induction substrate. The first induction substrate is disposed on the second induction substrate. The adhesive element covers the first induction substrate and the second induction substrate, and the adhesive element has a first adhesive portion and a second adhesive portion. When viewed in a direction perpendicular to the winding axis, the first adhesive portion and the second adhesive portion are located on different planes.

A digital isolator according to an embodiment includes a first electrode, a first insulating part, a second electrode, a second insulating part, and a first dielectric part. The first insulating part is located under the first electrode. The second electrode is located under the first insulating part. The second insulating part is located around the first electrode along a first plane perpendicular to a first direction. The first direction is from the second electrode toward the first electrode. The first dielectric part is located between the first electrode and the second insulating part in a second direction along the first plane. The first dielectric part contacts the first electrode. A relative dielectric constant of the first dielectric part is greater than a relative dielectric constant of the first insulating part.

Systems, methods and apparatus for wireless charging are disclosed. A charging device has a resonant circuit that includes a transmitting coil. The charging device also has a driver circuit configured to power the resonant circuit, a pulse width modulator and a controller configured to provide a control signal to the pulse width modulator the control signal configuring the pulse width to provide a modulated drive signal to the driver circuit. The pulse width modulator is configured to provide the modulated drive signal to the resonant circuit. The resonant circuit is configured to operate as a low-pass filter that blocks frequency components of the modulated drive signal that correspond to the reference signal. The driver circuit is configured to use the modulated drive signal to produce a charging current in the resonant circuit. The charging current causes power to be wirelessly transferred to a receiving device through the transmitting coil.

A coil according to one embodiment of the present invention is a coil in which a first electric wire on an inner peripheral side and a second electric wire on an outer peripheral side are wound side by side to connect ends of the electric wires with each other, and the coil includes a first region where the first electric wire abuts on the second electric wire of another adjacent turn and separates from the second electric wire of a same turn.

Disclosed is a PCB of a planar transformer including: a PCB substrate with a through hole and a double-sided winding part formed on double sides of the PCB substrate, wherein the double-sided winding part is of a symmetric structure, a via hole consistent with the through hole is formed in the center of the double-sided winding part, the via hole is aligned to the through hole to form a magnetic core hole, and the circumference of the via hole is raised to form wire blocking parts; and forming a wire passing groove in the wall of the magnetic core hole, wherein the wire passing groove allows a metal conducting wire to pass through to be planarly wound from inside to outside on double sides of the double-sided winding part at the same time so as to form two coils in series located on the double sides of the PCB substrate.

The present invention comprises a novel foldable and intrinsically safe planar coiled inductance sensor to measure liquid depths, solids in liquid depths, and two different liquids depths. This invention is used in onsite wastewater management systems (OWTS) to monitor depths of solids, oil, and effluent in a wastewater tank. The inductors are configured to allow for solids, liquids and gases to surround the coils. A number of coils are hung in series from near the OWTS tank lid to at least 18 inches below the output baffle to measure the different materials at different depths in the OWTS tank. The inductance sensors are capable of use with various materials to measure solids, oil, and effluent depths in an OWTS tank.

A transmission coil used in a wireless power transmitter includes a first coil, a second coil electrically connected in series with the first coil, and a tap provided at a connection node of the first coil and the second coil, the first coil and the second coil being stacked to at least partially overlap with each other. A transmission antenna includes the transmission coil, a first capacitor and a second capacitor connected in series with the transmission coil, and a switch provided in parallel to a series connection circuit of the second coil of the transmission coil and the second capacitor. A wireless power transmitter includes the transmission antenna and a bridge circuit that drives the transmission antenna. A charger includes the wireless power transmitter.