Lg Electronics Inc.

Gyunghwan Yook

Yongcheol Park

Joonho Park

Kyunghwan Kim

Jinho Youn

Jaeyeol Kim

Jihyun Lee

Jaesung Lee

Minsoo Lee

Jeongkyo Seo

Seonghun Lee

Jingu Choi

Taewook Kwon

Hyoungseok Kim

Hongkwon Kim

Jinmoo Park

Hwanyong Kim

Bongsik Kwak

Sungkyu Kim

Seong Hun Lee

Hyoung Seok Kim

Seunghyun Yoo

Youngchan Cho

The present disclosure provides a method for transmitting wireless power performed by a wireless power transmitter in a wireless power transmission system, and an apparatus using same, the method comprising: receiving information for detecting whether a foreign object (FO) exists from a wireless power receiver; detecting whether the FO exists before transmission of wireless power on the basis of the information; transmitting the wireless power to the wireless power receiver on the basis of detecting that the FO does not exist; and calculating a slot quality factor on a slot while transmitting the wireless power, wherein the slot quality factor is a quality factor used to determine whether an FO has been inserted while transmitting the wireless power, and a starting point of the slot is a point at which a voltage value of a coil in a wireless power transmitter is the maximum value and a current value of the coil is 0.

Method and apparatus for measuring quality factor in wireless power transmission system

The present invention relates to an apparatus and a method for performing power calibration in a wireless power transmission system. The present specification provides a wireless power transmission apparatus comprising: a power conversion unit configured to transmit, in a power transfer phase, wireless power generated on the basis of magnetic coupling to a wireless power receiving device; and a communication/control unit configured to perform an initial calibration for a power parameter prior to the power transfer phase, receive a first received power packet from the wireless power receiving device indicating the power received by the wireless power receiving device during the power transfer phase, and detect foreign matter by using the received power and a first power loss determined on the basis of the initial calibration. It is possible to adaptively respond to a newly changed wireless charging environment to calibrate transmission power and reception power, and it is possible to detect foreign matter more precisely by detecting a power loss on the basis of the calibrated transmission and reception power.

Apparatus and method for performing power calibration in wireless power transmission system

Discussed is a wireless charging device that changes a direction of a magnetic field generated by a transmission coil, through a repeater capable of rotating in a plane, and supports a user terminal in parallel with the repeater, to wirelessly transmit power in various directions and at various angles. The wireless charging device includes a power transmitting module including a plurality of transmission coils arranged side by side, therein, a terminal supporting module including a repeater therein and disposed at a slant with respect to an upper surface of the power transmitting module on the upper surface of the power transmitting module, a moving module to move the terminal supporting module along a direction in which the transmission coils are arranged, and a controller to supply a voltage to any one of the plurality of transmission coils depending on a position of the moving module.

Wireless charging apparatus that can support user terminal in various directions and at various angles

The present disclosure provides a method for transmitting wireless power performed by a wireless power transmitter in a wireless power transmission system, and a device using same, the method characterized by entering a power transmission phase associated with transmission of wireless power, and transmitting a first data stream to a wireless power receiver during the power transmission phase, wherein the wireless power transmitter: transmits, to the wireless power receiver, reset information notifying of the resetting of the first data stream; receives a response to the reset information from the wireless power receiver; and resets the first data stream on the basis of receiving the response.

Communication reset and abortion in wireless power transmission system

The present specification provides a method for performing wireless power reception by a wireless power receiver in a wireless power transmission system, and a device using the method, the method comprising: transmitting information related to a power transfer contract to a wireless power transmitter; generating the power transfer contract with the wireless power transmitter on the basis of the information; and receiving the wireless power from the wireless power transmitter on the basis of the power transfer contract, wherein the wireless power receiver transmits the information to the wireless power transmitter on the basis of an amplitude shift keying (ASK) signal, and the ASK signal is generated on the basis of an input signal based on pulse width modulation (PWM).

Method and device for improving communication quality on basis of PWM in wireless power transmission system

The present disclosure provides a method for receiving wireless power by a wireless power receiver in a wireless power transmission system and a device using same, the method comprising: in a negotiation phase, transmitting request information to a wireless power transmitter and establishing a power transfer contract with the wireless power transmitter on the basis of the request information; and in a power transfer phase, receiving the wireless power from the wireless power transmitter on the basis of the power transfer contract, wherein the request information comprises information related to the number of cycles of FSK, the wireless power receiver receives data information from the wireless power transmitter through the FSK based on the information related to the number of cycles, and the wireless power receiver decodes the FSK in an interval changing according to the number of cycles.

Method and device for data communication based on FSK in wireless power transmission system

The present specification provides a method for transmitting an address relating to out-band communication performed by a wireless power receiver in a wireless power transmission system, and a device using same, the method characterized by: transmitting to a wireless power transmitter the address relating to the out-band communication of the wireless power receiver, by means of in-band communication established with the wireless power transmitter; exchanging information relating to scan with the wireless power transmitter prior to the establishment of the out-band communication; and establishing the out-band communication on the basis of the address relating to the out-band communication and the information relating to the scan, wherein the information relating to the scan comprises additional information relating to the wireless power receiver.

Method and device for connecting devices by means of Bluetooth and in-band communication in wireless power transmission system

Provided are: a method for establishing out-band communication performed by a wireless power transmitter in a wireless power transmission system; and a device for using same. The method comprises the steps of: transmitting a plurality of pieces of capability information to a plurality of wireless power receivers respectively through in-band communication, wherein each of the plurality of pieces of capability information includes information about whether the wireless power transmitter supports the out-band communication; establishing the out-band communication with the plurality of wireless power transmitters on the basis of the transmission of the plurality of pieces of capability information; and exchanging power control information pertaining to the plurality of wireless power receivers with the plurality of wireless power receivers through the out-band communication.

Method and device for controlling power of multiple devices in wireless power transmission system

A wireless power transmission apparatus for transmitting wireless power to a wireless power reception apparatus, according to an embodiment of the present specification: transmits wireless power to the wireless power reception apparatus by means of magnetic coupling to the wireless power reception apparatus at an operating frequency; communicates with the wireless power reception apparatus by using at least one of in-band communication using the operating frequency and out-band communication using BLUETOOTH® communication; performs an authentication step with the wireless power reception apparatus to increase the level of the wireless power being transmitted to the wireless power reception apparatus; and includes, in a BLUETOOTH® packet, an authentication message required in the authentication step, and transmits the included authentication message to the wireless power reception apparatus via the BLUETOOTH® communication.

Wireless power transmission apparatus and wireless power reception apparatus for transferring and receiving wireless power

A wireless power transmitter including a power conversion unit configured to transmit wireless power generated based on magnetic coupling in a power transfer phase and a control unit configured to receive, from the wireless power receiver operating at a first operating point, a first received power packet of the first operating point and a second received power packet of the first operating point based on the first received power packet of the first operating point and the second received power packet of the first operating point and configured to receive a first received power packet of the second operating point and a second received power packet of the second operating point related to power calibration and construct a second power calibration curve based on the first received power packet of the second operating point and the second received power packet of the second operating point.

Method and apparatus for performing power calibration in wireless power transfer system

A method in a wireless power transfer system can include, in response to a digital ping initiated by a wireless power transmitter, transmitting to the wireless power transmitter during a ping phase, a response signal. The method can further include transmitting, to the wireless power transmitter during a configuration phase, a configuration packet including first control information related to whether a wireless power receiver supports an authentication function to authenticate the wireless power transmitter; receiving, from the wireless power transmitter during a negotiation phase, a capability packet including second control information and a potential power value of the wireless power transmitter; and transmitting, to the wireless power transmitter during a power transfer phase, an authentication request message.

Device and method for performing authentication in wireless power transmission system

A wireless power transmitting device according to an embodiment of the present specification transmits wireless power to a wireless power receiving device, and includes a power conversion circuit including a primary coil for transmitting the wireless power to the wireless power receiving device and a communication/control circuit for communicating with the wireless power receiving device and controlling the power conversion circuit, wherein, to detect foreign substances between the wireless power receiving device and the wireless power transmitting device, the communication/control circuit stops the transmission of the wireless power for a slot time, detects the foreign substances on the basis of a change in the voltage or current of the primary coil within the slot time, and sets the slot time to start from a point in time when the current of the primary coil is 0.

Wireless power transmitting device and method of detecting foreign substances by wireless power transmitting device

A wireless power transmitting device according to an embodiment of the present specification relates to a wireless power transmitting device for transmitting wireless power to a wireless power receiving device, and comprises: a power conversion circuit including a primary coil for transmitting the wireless power to the wireless power receiving device; and a communication/control circuit for communicating with the wireless power receiving device and controlling the power conversion circuit, wherein, before transmitting the wireless power to the wireless power receiving device, the communication/control circuit temporarily applies driving power to the primary coil and then stops the transmission of the driving power, and obtains a quality factor on the basis of a change in the voltage or current of the primary coil during a period of time in which the transmission of the driving power is stopped.

Wireless power receiving device and method of obtaining quality factor of wireless power transmitting device

A method by which a wireless power transmitter transmits wireless power, according to one embodiment of the present specification, comprises: a ping step of transmitting a digital ping, and receiving a response to the digital ping from a wireless power receiver; a configuration step of receiving, from the wireless power receiver, a configuration packet including information about whether the wireless power receiver supports an authentication function; and a power transmission step of transmitting wireless power to the wireless power receiver, wherein the power transmission step includes a low-power transmission step of transmitting low wireless power, an authentication step of authenticating the wireless power transmitter on the basis the supporting of the authentication function by the wireless power receiver, and a high-power transmission step of transmitting high wireless power on the basis of the successful authentication of the wireless power transmitter in the authentication step.

Wireless power transmission method over a plurality of phases and wireless power reception method

A wireless power receiving device according to one embodiment of the present specification comprises: a power pickup circuit for receiving wireless power from a wireless power transmitting device; and a communication/control circuit for communicating with the wireless power transmitting device by using in-band communication using a power signal of the wireless power and/or out-band communication, which is wireless communication that differs from the in-band communication, and for controlling the reception of the wireless power, wherein the communication/control circuit terminates the connection of the out-band communication on the basis of the removal of the power signal from the wireless power transmitting device in a state in which the connection of the wireless power transmitting device and the out-band communication is established.

Growing community of inventors

Seoul, South Korea

Gyunghwan Yook