Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Yu-Su Kim

Se-Ho Park

Kyung-Woo Lee

Kang-Ho Byun

Sung-Ku Yeo

Seung-Woo Han

Young-Min Lee

Woo-Ram Lee

Sung-Jin Park

So-Young Kim

Youn-ho Choi

Chong-Min Lee

Hyo-Seok Han

Hyung-Koo Chung

Shi-yun Cho

Gyu-Hyeong Cho

Jin-Hyoung Park

Sung-Kweon Park

Kyung-Wan Park

Byung-Jik Kim

Dong-Zo Kim

Joon-Il Kim

Toshikazu Takayanagi

Ji-hyun Jung

Eun-Hwa Lee

Shi-Yun Cho

Bong-Chul Kim

Ji-Hyun Jung

Kyung-woo Lee

Ho-Seong Lee

Kyu-Suk Lee

Yu-Dong Bae

Se-Ki Kim

Ho-Seong Seo

Seok-Myong Kang

Min-Cheol Ha

Jun-han Choi

Kyu-Sub Kwak

Yun-Jeong Noh

Jae-Hyuck Lee

Dae-Myung Kim

Hee-Seok Jeong

Hyung-Sun Lee

Hyun-Sub Park

Ga-Eun Lee

A wireless power receiver for wirelessly receiving power from a wireless power transmitter comprises: a power reception circuit receiving electromagnetic waves emitted from the wireless power receiver so as to output power having an alternating current waveform; a rectifier for rectifying the power, having an AC waveform, outputted from the power reception circuit into power having a direct current waveform; a DC/DC converter for converting, into a voltage of a preset level, a voltage of the power having a direct current waveform, the power being rectified by the rectifier; a charger for charging a battery by using the power having a DC waveform, converted from the DC/DC converter; an alternating current ground connected to the power reception circuit and/or the rectifier so as to receive at least a portion of the power having an alternating current waveform; and a direct current ground connected to the DC/DC converter and/or the charger so as to receive at least a portion of the power having a direct current waveform, wherein the alternating current ground and the direct current ground can be disposed on different PCB layers, respectively.

Wireless power transmitter and wireless power receiver including multiple grounds for reducing electro-magnetic interference

An apparatus and a method for are provided for a wireless power receiver. The method includes receiving power from a wireless power transmitter; converting the power in an alternating current (AC) form into a direct current (DC) form and providing the converted power to a battery of the electronic device; measuring a temperature of a point in the wireless power receiver during reception of the wireless power; maintaining an amount of the converted power at a first level if the temperature is lower than a first temperature; decreasing the amount of the converted power to a second level which is lower than the first level if the amount of the converted power is at the first level and the temperature is higher than or equal to the first temperature; stopping providing the converted power to the battery if the temperature is higher than a second temperature; and transmitting, to the wireless power transmitter, a signal including status information of the wireless power receiver device and control information to control the wireless power transmitter.

Method and apparatus for protecting wireless power receiver from excessive charging temperature

A method and an apparatus for wireless power transmission by a power transmitting apparatus is provided. The method includes transmitting detection power towards a power receiving apparatus, detecting an impedance change made by the power receiving apparatus, transmitting driving power for communication with the power receiving apparatus towards the power receiving apparatus, receiving a search signal from the power receiving apparatus within a preset time, and determining whether the impedance change is within a first acceptable range based on the received search signal.

Power transmitting and receiving apparatus and method for performing a wireless multi-power transmission

A method for controlling an electronic device including a charging circuit is provided. The method includes receiving power wirelessly from a power transmitting device; rectifying the received power; based on a voltage of the rectified power being greater than or equal to an allowable voltage of the charging circuit, controlling to convert the rectified power through a converting circuit of the electronic device and to output the converted power to the charging circuit for charging a battery of the electronic device, wherein the allowable voltage relates to a maximum voltage or a preferable voltage to be applied to the charging circuit; and based on the voltage of the rectified power being less than the allowable voltage of the charging circuit, controlling to stop converting the rectified power and to output the rectified power to the charging circuit by connecting the rectifying circuit to the charging circuit.

Wireless power receiver and controlling method thereof

An apparatus and a method for are provided for a wireless power receiver. The method includes receiving power from a wireless power transmitter; converting the power in an alternating current (AC) form into a direct current (DC) form and providing the converted power to a battery of the electronic device; measuring a temperature of a point in the wireless power receiver during reception of the wireless power; maintaining an amount of the converted power at a first level if the temperature is lower than a preset temperature; decreasing the amount of the converted power to a second level which is lower than the first level if the amount of the converted power is at the first level and the temperature is higher than or equal to the preset temperature; increasing the amount of the converted power to the first level if the amount of the converted power is at the second level and the temperature is lower than the preset temperature; and transmitting, to the wireless power transmitter, a signal including status information of the wireless power receiver device and control information to control the wireless power transmitter.

A method for controlling a wireless power receiver including a charging unit and a wireless power receiver are provided. The method includes receiving wireless power; rectifying the received wireless power and outputting Direct Current (DC) wireless power; and determining whether a voltage of the rectified wireless power is equal to or higher than an allowable voltage of the charging unit.

Wireless power transmitter and wireless power receiver

A method and power transmitter for efficiently controlling power transmission to one or more power receivers in a wireless multi-power transmission system are provided. The method includes performing, when a predetermined measurement cycle arrives, a load measurement; comparing a current load measurement value with a previous load measurement value; determining whether the current load measurement value is increased over the previous load measurement value by at least as much as a first predetermined threshold; gradually increasing, when the load measurement value is increased over the previous load measurement value by at least as much as the first threshold, a transmission power value until a request for a subscription to a wireless multi-power transmission network from a power reception target within a predetermined time limit; and stopping, when the request for the subscription is not received before the time limit is exceeded, power transmission to the power reception target.

Power transmitting method and power transmitter for communication with power receiver

An apparatus and a method for are provided for a wireless power receiver. The method includes receiving power from a wireless power transmitter; measuring a temperature of a point in the wireless power receiver during reception of the wireless power; regulating the received power; identifying the temperature at a first time point; maintaining an amount of the regulated power to be provided to a battery with a first level if the identified temperature is lower than a preset temperature; decreasing the amount of the regulated power if the identified temperature is greater than or equal to the preset temperature; in response to decreasing the amount of the regulated power, identifying the temperature at a second time point after the first time point; and increasing the amount of the regulated power to the first level if the identified temperature at the second time point is lower than the preset temperature.

A wireless power receiver for wirelessly receiving power from a wireless power supplier includes a power receiver for receiving wireless power from the wireless power supplier and storing the wireless power for a first time period, a rectifier connected to the power receiver for rectifying the wireless power, a power adjuster connected to the rectifier and an output end, for adjusting a magnitude of the wireless power by enabling the power receiver to store the wireless power for the first time period and delivering the wireless power to the output end for a second time period, and a controller for determining the first and second time periods.

Wireless power receiver for adjusting magnitude of wireless power

An integrated circuit for wireless charging and a method for wireless charging by an integrated circuit are provided. The integrated circuit includes a first wireless communication unit configured to support a first wireless communication method; a first route selection unit configured to perform a selection from among a first power input from a battery and a second power input according to wireless charging to be allowed as input; a power block configured to receive the selected power from the first route selection unit, and provide the received power to the first wireless communication unit; and a controller configured to control an operation of the first route selection unit.

Integrated circuit for wireless charging and operating method thereof

Growing community of inventors

Gyeonggi-do, South Korea

Yu-Su Kim