Lg Electronics Inc.

Jinho Youn

Yongcheol Park

Gyunghwan Yook

Hyokune Hwang

Taewook Kwon

Seonghun Lee

Jaeyeol Kim

Hyoungseok Kim

Dohyeon Son

Jaehyeuck Choi

Minsoo Lee

Kyunghwan Kim

Munchae Joung

Sunuk Kim

Youngjun Cho

Hongkwon Kim

Jingu Choi

Jeongkyo Seo

Sooyong Park

Jaecheon Sa

Jonggu Kim

Seungjae Shin

The present disclosure provides a method by which a wireless power transmitter transmits wireless power in a wireless power transmission system, and a device using same, the method comprising: receiving, from a wireless power receiver, information for sensing whether a foreign object (FO) is present; sensing, on the basis of the information, whether the FO is present before the transmission of wireless power; transmitting, on the basis of sensing that the FO is not present, the wireless power to the wireless power receiver; and measuring a slot quality factor and a coupling factor on a slot while the wireless power is transmitted, wherein the slot quality factor is a quality factor used to determine whether the FO is inserted while the wireless power is transmitted, and the coupling factor is a factor related to the alignment between the wireless power transmitter and the wireless power receiver.

Method and device for utilizing coupling factor in wireless power transmission system

The present specification (present disclosure) provides a method for transferring wireless power by a wireless power transmitter in a wireless power transmission system and a device using same, the method comprising: entering a power transfer phase related to transferring the wireless power to a wireless power receiver; and detecting an illegal packet during the power transfer phase, wherein, on the basis that the illegal packet is detected, the wireless power transmitter terminates a data transport stream, attempts opening the data transport stream, or restarts the data stream.

Method and device for illegal packet processing and validity verification in wireless power transmission system

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 specification (present disclosure) provides a method for receiving wireless power, performed by a wireless power receiver supporting a magnetic power profile (MPP), in a wireless power transmission system, and a device using same, the method comprising: transmitting a first identification (ID) packet to a wireless power transmitter on a first operating frequency, wherein the first ID packet includes information indicating the presence or absence of a first extended ID (XID) packet; transmitting the first XID packet to the wireless power transmitter on the first operating frequency, wherein the first XID packet includes information indicating that the first XID packet is a packet related to the MPP; and after transmission of the first XID packet, detecting whether the wireless power transmitter is operating on the first operating frequency or operating on a second operating frequency.

Method and device for providing compatibility with MPP in wireless power transmission system

The present disclosure provides a method for transferring wireless power, performed by a wireless power transmitter in a wireless power transmission system, and an apparatus using same, the method being characterized by: entering a power transfer phase related to transferring the wireless power; and receiving a first near field communication (NFC) signal from a wireless power receiver on a slot during the power transfer phase, wherein the slot is a duration in which a power signal has decreased or a duration in which an operation frequency has increased.

Method and apparatus for NFC communication and detection during charging in wireless power transmission system

The present disclosure provides a method for wireless power transmission by a wireless power transmitter in a wireless power transmission system, and a device using same, the method comprising: receiving a configuration packet from a wireless power receiver in a configuration phase, wherein the configuration packet related to the wireless power receiver includes information about whether a function of out-of-band communication is supported or not; and transmitting or receiving a specific packet related to the out-of-band communication in a negotiation phase, wherein the specific packet includes information for reporting an operation executed in the out-of-band communication.

Out-of-band communication in wireless power transmission system, and configuration method and device for out-of-band communication

The present disclosure provides a method for initiating a calibration protocol performed by a wireless power receiver in a wireless power transmission system, and an apparatus using same, the method comprising: transmitting information about negotiation termination to a wireless power transmitter, receiving ACK from the wireless power transmitter in response to the information about the negotiation termination; initiating the calibration protocol according to entering a power transmission phase on the basis that the ACK is received; transmitting, to the wireless power transmitter, at least one piece of information related to construction of a calibration curve; and transmitting, to the wireless power transmitter, information about termination of the calibration protocol, wherein the wireless power receiver transmits, to the wireless power transmitter, the at least one piece of information within a timeout period for each of the at least one piece of information.

Calibration method and apparatus in wireless power transmission system

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

A wireless power transmission method performed by a wireless power transmitter in a wireless power transmission system, and an apparatus using same, the method including: in a setup phase, receiving a setup packet from a wireless power receiver, wherein the setup packet related to the wireless power receiver includes information about whether a function for out-of-band communication is supported; in a negotiation phase, transmitting a capability packet to the wireless power receiver, wherein the capability packet related to the wireless power transmitter includes information about whether a function for the out-of-band communication is supported; and in the negotiation phase, receiving a specific request (SRQ) packet related to an end of the negotiation phase from the wireless power receiver, and transmitting ACK for the SRQ packet to the wireless power receiver, wherein the wireless power transmitter starts a connection to the out-of-band communication based on transmission of the ACK.

Connection method and apparatus for out-of-band communication in wireless power transmission system

Provided are: a wireless power transfer method performed in a wireless power transfer system by a wireless power transmitter; and a device using same. The method: performs first authentication with a wireless power receiver in a power transfer phase related to transferring the wireless power; receives authentication token information in the power transfer phase from the wireless power receiver after or during the first authentication; and performs second authentication with the wireless power receiver in a new negotiation phase on the basis of the authentication token information after leaving the power transfer phase.

Method and device for authentication in wireless power transfer 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 reception device according to one embodiment of the present specification comprises: a power pickup circuit for receiving wireless power from a wireless power transmission device; and a communication/control circuit for communicating with the wireless power transmission device and controlling the transmission of the wireless power, wherein the communication/control circuit performs an authentication protocol of transmitting an authentication request message to the wireless power transmission device and receiving an authentication response message as a response to the authentication request message from the wireless power transmission device, receives, from the wireless power transmission device, a reset message for requesting the reset of the authentication protocol while performing the authentication protocol, and restarts the authentication protocol.

Growing community of inventors

Seoul, South Korea

Jinho Youn