Samsung Electronics Co., Ltd.

Soongsil University

Sungkyunkwan University

Korea Advanced Institute of Science and Technology

Chongmin Lee

Sungku Yeo

Jaeseok Park

Hyoseok Han

Beomwoo Gu

Youngho Ryu

Jaehyun Park

Jeongman Lee

Mikhail Nikolaevich Makurin

Kangho Byun

Artem Rudolfovitch Vilenskiy

Jaesun Shin

Chul Hun Seo

Seunghyun Lee

Bohwan Choi

Sangwook Lee

Daehyun Kim

Dongin Kim

Elena Aleksandrovna Shepeleva

Hyunseok Shin

Kangyoon Lee

Sungbum Park

Kyungwoo Lee

Songcheol Hong

Youngjun Park

Jinseok Park

Sangyun Kim

Sanghyuk Wi

Seogyong Jeong

Byeongguk Choi

Imran Ali

Hyoungjun Kim

Jaehyuck Shin

Junhyeong Park

Seunghun Wang

Hamed Abbasizadeh

Kwangtae Kim

Seongjin Oh

Solhee In

An optically-controlled switch is provided. The optically-controlled switch includes a circuit board including a transmission line and a photoconductive switching region that is adjacent to the transmission line and has electrical properties controllable by light and a laser located on the circuit board and configured to emit light toward the photoconductive switching region.

Optical control switch and electronic device comprising same

A multilayer inductor is provided. The multilayer inductor includes a multilayer winding portion comprising a plurality of coil layers that are vertically stacked, and having an inner surface that defines a hollow of the plurality of coil layers and having an outer surface that defines an outer side and a magnetic compensator made of a soft magnetic material and comprising a magnetic wall located at at least one of the inner surface or the outer surface of the multilayer winding portion.

Multilayer inductor

An electronic device may include: a battery, a resonant circuit including a receiving coil, at least one capacitor and at least one switch, a rectifier circuit; a DC/DC converter, a charge control circuit; and a controller, wherein the controller may be configured to check the voltage outputted from the rectifier circuit, control the at least one switch so that the receiving coil and the at least one capacitor form a serial resonant circuit, if the voltage output from the rectifier circuit is greater than or equal to a threshold voltage, and control the at least one switch so that the receiving coil and the at least one capacitor form a parallel resonant circuit, if the voltage output from the rectifier circuit is less than the threshold voltage.

Electronic device wirelessly receiving power, and operating method therefor

A wireless power receiver receiving power from a wireless power transmitter is provided. The receiver includes a resonance circuit, a rectifier circuit, and a driver circuit. The resonance circuit includes first and second coils and a first capacitor. The rectifier circuit includes first and second rectifier circuits. The first rectifier circuit includes first through fourth MOSFETs. Sources of the first and second MOSFETs are connected to ends of a resonator including the first coil and the first capacitor. Sources of the third and fourth MOSFETs are connected to ground. The driver circuit is connected to gates of the first through fourth MOSFETs, When the driver circuit switches off the first and second MOSFETs and switches on the third and fourth MOSFETs, as currents are induced in the resonator and the second coil, the resonance circuit receives the wireless power, and the current induced in the second coil is rectified by the second rectifier circuit.

Electronic device receiving wireless power

The disclosure provides an electronic device and a method for controlling wireless charging in the electronic device. An electronic device includes: a sensor, a battery, a resonance circuit configured to wirelessly receive power, a rectification circuit configured to rectify an alternating current (AC) power provided from the resonance circuit into a direct current (DC) power, a DC/DC converter configured to convert the DC power provided from the rectification circuit to output a converted power, a charging control circuit configured to charge the battery using the converted power provided from the DC/DC converter, and a controller, and the controller may be configured to: identify movement information of the electronic device corresponding to a value sensed via the sensor, identify a voltage value of the DC power rectified via the rectification circuit, and control an output of the DC/DC converter based on the movement information and the voltage value.

Electronic device and method for controlling wireless charging in electronic device

Provided is an electronic device including: a battery, a resonant circuit including a coil and a capacitor configured to wirelessly receive power, a rectifying circuit configured to rectify an alternating current power provided from the resonant circuit to a direct current power, a DC/DC converter configured to convert the direct current power provided from the rectifying circuit and to output the converted direct current power, a charging circuit configured to charge the battery using the converted direct current power provided form the DC/DC converter, a controller, and a communication circuit, wherein the controller is configured to: control the charging circuit to set a magnitude of a reference current of the charging circuit to a first value, the first value being less than a maximum value of an output current of the charging circuit, control the charging circuit to set the magnitude of the reference current to a second value greater than the first value, measure a magnitude of an output current of the charging circuit after setting the magnitude of the reference current to the second value, control, based on a difference between the measured magnitude and the second value being less than or equal to a specified set value, the charging circuit to set the magnitude of the reference current to a third value greater than the second value, and control, based on the difference between the measured magnitude and the second value exceeding the specified set value, the charging circuit to set the magnitude of the reference current to the first value to receive wireless power.

Electronic device stabilizing output current of charging circuit and controlling method thereof

A rotary-type data transmission device is provided. The rotary-type data transmission includes a first structure having a first surface and a second surface facing each other and including a first metal hollow waveguide including a first through hole passing through the second surface from the first surface in a center portion thereof, a second structure coupled to the first structure to support rotation of the first structure or to support rotation by the first structure, a first transceiver facing the first surface at a certain distance therebetween, coupled to the first structure, and including a first printed circuit board, a first meta waveguide, and a first transceiver, and a second transceiver facing the second surface at a certain distance therebetween, coupled to the second structure, and including a second printed circuit board, a second meta waveguide, and a second transceiver.

Rotary-type data transmission device and electronic apparatus including the same

The disclosure provides a wireless power transmitting apparatus and a method for wirelessly transmitting power by the wireless power transmitting apparatus. The wireless power transmitting apparatus according to an example embodiment comprises: a power amplifier; a coil connected to the power amplifier and configured to generate an electromagnetic field based on power received from the power amplifier; an impedance sensing circuit connected between the power amplifier and the coil; at least one auxiliary coil electromagnetically coupled to the coil; and a controller, wherein the controller may be configured to: identify a change in impedance, from a signal sensed through the impedance sensing circuit, and adjust an operation setting of the at least one auxiliary coil based on the identified change in impedance.

Wireless power transmitting apparatus and method for wirelessly transmitting power by wireless power transmitting apparatus

An electronic device includes a plurality of loads, at least one processor, a plurality of regulators configured to adjust a voltage of power received from a power source and output the adjusted power, and a switching circuit configured to connect at least one of the plurality of regulators to at least one of the plurality of loads. The at least one processor is configured to identify a load to which power is to be supplied among the plurality of loads, select at least one regulator among the plurality of regulators connectable to the identified load, and control the switching circuit to connect the at least one selected regulator to the identified load.

Electronic device for performing power management and method for operating the same

An electronic circuit according to various embodiments may comprise: a switch circuit, wherein the switch circuit may comprise: a first switch connected to a first port and a second switch connected to a second port, the first and second switches being connected in series with each other; a first parallel switch connected to a node between the first switch and the second switch; and a first shunt inductor connected to the node between the first switch and the second switch and configured to cancel a parasitic capacitance component of the first parallel switch.

Electronic circuit and power amplifier comprising same

According to various embodiments, a wireless power reception device for receiving wireless power from a wireless power transmission device may include a first circuit, a first rectifier circuit, a detuning circuit, and a control circuit. The first circuit may include a first coil. The first rectifier circuit may include a first switch and a second switch among a plurality of switches. The detuning circuit may include at least one detuning capacitor and at least one detuning switch. In response to a voltage at an output terminal of the first rectifier circuit exceeding a first voltage, the control circuit may be configured to form a closed loop including the first coil, the first switch, and the second switch by controlling the at least one detuning switch to an on state and controlling the first switch and the second switch to the on state.

Wireless power reception device including detuning circuit

Disclosed is an annular resonator including a conductor formed on a surface of an annular shaped structure and having a first end and a second end opposite to the first end, and a capacitor having a first end and a second end opposite to the first end, wherein a radius of curvature of a first side facing a center portion of the annular shaped structure is smaller than a radius of curvature of a second side facing an outer periphery of the annular shaped structure, and wherein the first end and the second end of the conductor are electrically connected to the first end and the second end of the capacitor, respectively.

Annular resonator and wireless power transmission device including annular resonator

According to an embodiment, an electronic device may include a battery, a resonance circuit, a rectifier, a DC/DC converter, a charger, a switch, an overvoltage protection circuit configured to perform an overvoltage protection operation or to stop the overvoltage protection operation based on the voltage at the output terminal of the rectifier, a control circuit, and a communication circuit, and the control circuit may be configured to: based on a periodic repetition of a performance of the overvoltage protection operation and a stop of the overvoltage protection while the switch is in an off state, identify a first period during which the overvoltage protection operation is stopped, based on the first period, identify an expected voltage at an output terminal of the rectifier, to be expected, wherein the expected voltage is a voltage if the switch is in an on state, based on the expected voltage, identify whether an occurrence of an overvoltage is expected if the switch is in the on state, and control the communication circuit to transmit a communication signal including information about whether the occurrence of the overvoltage is expected.

Electronic device to wirelessly receive power and operating method thereof

An electronic device includes a power transmitter; a first communication interface configured to support an Ultra-Wideband (UWB) communication scheme; a second communication interface configured to support a Bluetooth communication scheme; and a processor configured to: control the first communication interface to transmit a first signal and receive a second signal corresponding to the first signal via the first communication interface, identify, based on a difference between a transmission time of the first signal and a reception time of the second signal, first location information of a first external device, control the power transmitter to transmit a first driving power having a first magnitude, based on a first distance between the first external device and the electronic device being within a first range, the first distance being identified based on the first location information, establish a Bluetooth communication connection with the first external device, based on receiving, via the second communication interface, a first packet transmitted from the first external device using the first driving power, after transmitting the first driving power, and control the power transmitter to transmit a first charging power having a second magnitude, after establishing the Bluetooth communication connection.

Wireless power transmission device transmitting charging power to wireless power receiving device and method of operating the same

Growing community of inventors

Suwon-si, South Korea

Chongmin Lee