Samsung Electronics Co., Ltd.

Kangho Byun

Jaehyun Park

Beomwoo Gu

Sungku Yeo

Chongmin Lee

Youngho Ryu

Jaeseok Park

Hyoseok Han

Jaesun Shin

Daehyun Kim

Sungbum Park

Jeongman Lee

Hyunseok Shin

Bohwan Choi

Seogyong Jeong

Jihoon Jung

Kiyoung Kim

Paul Jang

Jihyun Yang

A wireless power transmission device is provided. The wireless power transmission device includes a transmission coil including a first member, which has one end and the other end forming a first angle with a plane, and a second member, which is arranged on the plane and is connected to each of the one end and the other end of the first member, an impedance sensor for outputting a voltage value corresponding to an impedance change amount of a resonance circuit, which includes the transmission coil, a magnetic body having a side surface that is dented, the dented side surface facing a portion of the transmission coil, a motor for moving the magnetic body, memory storing one or more computer programs, and one or more processors communicatively coupled to the memory, wherein the one or more computer programs include computer-executable instructions that, when executed by the one or more processors individually or collectively, cause the wireless power transmission device to receive the output voltage value from the impedance sensor, calculate the difference value between a reference voltage value and the received voltage value, determine control information about the motor on the basis of the calculated difference value, and drive the motor through the determined control information so as to control the distance between the magnetic body and the portion of the transmission coil.

Wireless power transmission device and operating method therefor

An electronic device for wirelessly transmitting power may include a first resonator including a first coil, a second resonator including a second coil having a different size from the first coil, an impedance matching circuit including at least one capacitor connected through a switch, and a controller. The controller may be configured to identify which one of a first electronic device not mounted on the electronic device and a second electronic device mounted on the electronic device power is to be transmitted to. The controller may be configured to, when power is to be transmitted to the first electronic device, transmit power through the first resonator by opening the switch. The controller may be configured to, when power is to be transmitted to the second electronic device, transmit power through the second resonator by closing the switch.

Electronic device for wirelessly transmitting power including a plurality of coils, and method of operating the same

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

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

The disclosure provides a variable wireless power transmitter including a plurality of resonators and a method of controlling the variable wireless power transmitter. A wireless power transmitter of the disclosure may include: a housing; a power amplifier disposed inside the housing; a first resonator including at least one coil and fixed to a first portion of the housing; a second resonator including at least one coil, rotatably disposed at a second portion of the housing, and configured to form a variable angle with the first resonator; a sensor configured to sense a shape change based on rotation of the second resonator; a controller configured to: identify a shape change of the first resonator and the second resonator based on a signal sensed by the sensor, identify whether impedance is matched for the first resonator or the second resonator based on the identification of the shape change, and generate a control signal for impedance matching for the first resonator or the second resonator based on identifying that the impedance is not matched; and a matching circuit including at least one coil and at least one capacitor, electrically coupled between the power amplifier and the first resonator, and configured to perform impedance matching based on the control signal received from the controller.

Variable wireless power transmitter including plural resonators and method of controlling the wireless power transmitter

An example wireless charging device includes a wireless charging device body and a wireless power transmitting device disposed on the wireless charging device body. The wireless power transmitting device includes at least one transmitting coil and a transmitting magnetic body configured to surround the at least one transmitting coil and to face a receiving magnetic body provided on a wireless power receiving device of an external electronic device. The inner peripheral surface of the wireless power transmitting device faces the inner surface of the wireless charging device body. The transmitting magnetic body is formed in a ring structure, at least a part of which is open. One surface of the open ring structure is disposed on at least a part of the inner surface of the wireless charging device body. One surface of the ring structure of the transmitting magnetic body faces the receiving magnetic body.

Wireless charging device

Provided are various embodiments related to an electronic device. According to an embodiment, an electronic device may comprise: an IR (infrared light) transmission unit for outputting IR light; an IR reception unit for receiving IR light; and processor. The processor is configured to: identify a first IR transmission signal to be transmitted to an external device; identify a first time interval and a second time interval, which correspond to the first IR transmission signal; output first IR light corresponding to at least a part of the first IR transmission signal through the IR transmission unit in the first time interval; identify whether second IR light having the intensity larger than or equal to a threshold is received by the IR reception unit in the second time interval; and when the second IR light having the intensity larger than or equal to the threshold is received by the IR reception unit in the second time interval, interrupt transmission of the IR transmission signal. In addition, other embodiments may be possible.

Electronic device and infrared communication method based on interference detection in electronic device

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

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

An electronic device for wirelessly transmitting power includes a first coil assembly; a second coil assembly; and a processor configured to control to generate a first magnetic field by applying first current to the first coil assembly; obtain a plurality of first sensing values of the first magnetic field sensed by a plurality of coils included in the second coil assembly; and identify whether a foreign material exists in a power transmission area of the electronic device based on the plurality of first sensing values.

Electronic device for wirelessly transmitting power and method of operating the same

A wireless power transmission apparatus for wirelessly transmitting power to a wireless power reception apparatus is provided. The wireless power transmission apparatus includes a power transmitting circuit including a coil and at least one processor to control to transmit, via the power transmitting circuit, a pilot power with changing a frequency of the pilot power within a predetermined frequency range, obtain a magnitude of power wirelessly transmitted to a wireless power reception apparatus based on the transmitted pilot power, determine an operating frequency based on the obtained magnitude, and control to transmit, via the power transmitting circuit, a driving power having the operating frequency to drive the wireless power reception apparatus.

Growing community of inventors

Suwon-si, South Korea

Kangho Byun