METHOD FOR TRANSMITTING SIGNAL BY WIRELESS POWER TRANSMITTER IN WIRELESS CHARGING SYSTEM, WIRELESS POWER TRANSMITTER AND WIRELESS POWER RECEIVER

    公开(公告)号:US20210184506A1

    公开(公告)日:2021-06-17

    申请号:US17184160

    申请日:2021-02-24

    摘要: A method of transmitting a signal by a wireless power transmitter in a wireless charging system, wireless power transmitter, and a wireless power receiver are provided. The method includes receiving, from a wireless power transmitter, a first beacon power for a first duration time in every first period; receiving, from the wireless power transmitter, a second beacon power for a second duration time in every second period; if the wireless power receiver determines that an extension of the second beacon power is required, generating load changes while receiving the second beacon power for the second duration time; in response to the generated load changes, continually receiving, from the wireless power transmitter, the second beacon power until a predetermined third duration time, wherein the predetermined third duration time is determined before the second beacon power is transmitted by the wireless power transmitter; and transmitting an advertisement signal to the wireless power transmitter while receiving the second beacon power for the predetermined third duration time.

    Method for preventing abnormality during wireless charging

    公开(公告)号:US10998936B2

    公开(公告)日:2021-05-04

    申请号:US16799224

    申请日:2020-02-24

    摘要: Disclosed is a control method of a wireless power transmitter, including transmitting power to a plurality of wireless power receivers based on a first power value required by a first wireless power receiver from among the plurality of wireless power receivers, and before reaching a threshold condition in which a system error occurs in the wireless power transmitter, transmitting a power adjust command to reduce the power to a lower percentage of a maximum received power level, to at least one wireless power receiver from among the plurality of wireless power receivers, wherein the power adjust command is a control command for reducing power consumption of the at least one wireless power receiver from among the plurality of wireless power receivers, and wherein the system error comprises at least one of an over-temperature error, an over-current error, and an over-voltage error.

    Method and apparatus for recognizing characters

    公开(公告)号:US10803367B2

    公开(公告)日:2020-10-13

    申请号:US16717404

    申请日:2019-12-17

    摘要: A method and an apparatus for recognizing characters using an image are provided. A camera is activated according to a character recognition request and a preview mode is set for displaying an image photographed through the camera in real time. An auto focus of the camera is controlled and an image having a predetermined level of clarity is obtained for character recognition from the images obtained in the preview mode. The image for character recognition is character-recognition-processed so as to extract recognition result data. A final recognition character row is drawn that excludes non-character data from the recognition result data. A first word is combined including at least one character of the final recognition character row and a predetermined maximum number of characters. A dictionary database that stores dictionary information on various languages using the first word is searched, so as to provide the user with the corresponding word.

    Method and power transmitter for controlling power transmission

    公开(公告)号:US10797531B1

    公开(公告)日:2020-10-06

    申请号:US16931059

    申请日:2020-07-16

    摘要: Methods and apparatuses are provided for controlling power transmission in a power transmitter. Voltage information including a minimum voltage, a maximum voltage, and a first voltage, is received from each of a plurality of power receivers. Power is transmitted to the plurality of power receivers based on the voltage information. A respective report about a power reception condition is received from each of the plurality of power receivers while transmitting the power. Each respective report includes a measured voltage at a corresponding power receiver of the plurality of power receivers. A power receiver is selected from among the plurality of power receivers based on the received reports. An amount of the power is adjusted by reducing a difference between a first voltage of the selected power receiver and a measured voltage of the selected power receiver.

    Charging volatage configuring method for wireless charging and wireless power reception unit

    公开(公告)号:US10218206B2

    公开(公告)日:2019-02-26

    申请号:US14906200

    申请日:2014-07-18

    摘要: The present disclosure relates to a charging voltage configuring method for wireless charging to control a charging voltage of a wireless power reception unit in a wireless charging network. A charging voltage configuration method for wireless charging by a wireless Power Reception Unit (PRU) which receives wireless charging power from a wireless Power Transmission Unit (PTU) according to the present disclosure may include: measuring charging power received from the wireless power reception unit; when the measured charging power is smaller than a minimum power level for charging initiation or a difference between the measured charging power and the minimum power level is within a predetermined range, determining a voltage configuration value upwardly adjusted by a pre-configured level in comparison with a pre-configured voltage configuration value; and transmitting the determined voltage configuration value to the wireless power transmission unit.