Patents by Inventor Yun-kwon Park

Yun-kwon Park has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10205353
    Abstract: An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: February 12, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
    Inventors: Dong Zo Kim, Sang Wook Kwon, Ki Young Kim, Nam Yun Kim, Young Jin Moon, Yun Kwon Park, Keum Su Song, Chi Hyung Ahn, Young Ho Ryu, Chang Sik Yoo, Chang Wook Yoon, Jin Sung Choi
  • Patent number: 10199883
    Abstract: Provided is an apparatus and method that may stably perform wireless transmission. According to one general aspect, a power supply for a wireless power transmitter may include: a detecting unit configured to detect voltage, current, or both supplied to a power amplifier (PA); a controller configured to determine power supplied to the PA based on the detected voltage, the detected current, or both, and to determine a reference current based on the determined power supplied to the PA; and a breaker configured to cut off the power supplied to the PA based on a comparison of current supplied to the PA and the reference current.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: February 5, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam Yun Kim, Sang Wook Kwon, Yun Kwon Park, Jin Sung Choi
  • Patent number: 10141979
    Abstract: An apparatus and method of using near field communication (NFC) and wireless power transmission (WPT) are provided. A power receiving apparatus includes a resonator configured to receive a power and to output the power. The power receiving apparatus further includes a near field communication (NFC) receiver configured to perform wireless communication using the power output by the resonator. The power receiving apparatus further includes a wireless power transmission (WPT) receiver configured to supply a voltage using the power output by the resonator. The power receiving apparatus further includes a connecting unit configured to selectively connect the resonator to either the NFC receiver or the WPT receiver. The power receiving apparatus further includes a mode selector configured to control the connecting unit to selectively connect the resonator to either the NFC receiver or the WPT receiver based on the power output by the resonator.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: November 27, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Zo Kim, Sang Wook Kwon, Ki Young Kim, Nam Yun Kim, Yun Kwon Park, Eun Seok Park, Young Ho Ryu, Chang Wook Yoon, Jin Sung Choi, Young-tack Hong
  • Patent number: 10103648
    Abstract: An energy harvester is provided. The energy harvester includes a first friction member, and a second friction member arranged to face the first friction member and generating electrical energy by causing friction with the first friction member. At least one of the first friction member and the second friction member includes a pyroelectric material converting frictional heat generated due to friction of the first and second friction members into electrical energy. While the energy harvester generates electrical energy by triboelectrification, the energy harvester may convert frictional heat into electrical energy by using a pyroelectric material.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: October 16, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-jun Park, Yun-kwon Park
  • Patent number: 10091799
    Abstract: An apparatus and method for performing communication in a wireless power transmission system are provided. The apparatus includes a channel search unit configured to search for communication channels other than a channel used in wireless power transmission, and measure state information of the communication channels. The apparatus includes a channel determining unit configured to determine a communication channel available for communication with a target device based on the measured state information. The apparatus includes a communication unit configured to transmit an access instruction to the target device using the determined communication channel. The apparatus includes a controller configured to determine whether to communicate with the target device using the determined communication channel based on whether a response signal corresponding to the access instruction is received.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: October 2, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam Yun Kim, Sang Wook Kwon, Yun Kwon Park
  • Patent number: 10050479
    Abstract: A wireless power transmission system based on cell division is provided. A communication and power control method of the wireless power transmission system, includes setting a magnetic coupling zone. The method further includes detecting a target device in the magnetic coupling zone. The method further includes transmitting a power to the target device. The method further includes adjusting an amount of the power based on a transmission efficiency of the power.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: August 14, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun Seok Park, Sang Wook Kwon, Ki Young Kim, Nam Yun Kim, Dong Zo Kim, Yun Kwon Park, Young Ho Ryu, Chang Wook Yoon, Jin Sung Choi, Young Tack Hong
  • Patent number: 10038476
    Abstract: An apparatus and method for communication using a wireless power are provided. The apparatus includes an amplifier configured to amplify an input signal based on a power supplied to the amplifier. The apparatus further includes a control unit configured to detect a change in an impedance of a target device, and to change the power based on the change in the impedance. The apparatus further includes a demodulation unit configured to receive a message from the target device, and to demodulate the message based on the changed power.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: July 31, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam Yun Kim, Sang Wook Kwon, Yun Kwon Park, Eun Seok Park, Young Tack Hong, Ki Young Kim, Young Ho Ryu, Dong Zo Kim, Jin Sung Choi, Chang Wook Yoon
  • Patent number: 9997959
    Abstract: A wireless power transmission system and a method for increasing a coupling efficiency by adjusting a resonant frequency are provided. A device of the wireless power transmission system includes a resonator configured to transmit a wireless power, and a communication unit configured to receive information from another device. The device further includes a controller configured to determine a power transmission efficiency based on the information, and adjust a resonant frequency of the device, a resonant frequency of a relay device, and a resonant frequency of the other device, if the power transmission efficiency is less than or equal to a predetermined reference efficiency.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: June 12, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki Young Kim, Eun Seok Park, Young Ho Ryu, Sang Wook Kwon, Nam Yun Kim, Dong Zo Kim, Yun Kwon Park, Chang Wook Yoon, Jin Sung Choi, Young Tack Hong
  • Patent number: 9984814
    Abstract: A wireless power transmitter includes a source resonator configured to wirelessly transmit power via magnetic coupling with a target resonator; and an impedance adjusting unit configured to adjust an impedance of the source resonator using a plurality of impedance-matching bars located in the source resonator.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: May 29, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Keum Su Song, Sang Wook Kwon, Ki Young Kim, Nam Yun Kim, Dong Zo Kim, Yun Kwon Park, Eun Seok Park, Chi Hyung Ahn, Young Ho Ryu, Chang Wook Yoon, Jin Sung Choi
  • Patent number: 9985458
    Abstract: A power transmitting unit (PTU) transmits a power wirelessly based on a location of a power receiving unit (PRU). The PTU determines whether the PRU is located within a charging area of the PTU based on frequency information corresponding to an inflection point detected on a curve of electrical characteristics of a resonator of the PTU.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: May 29, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Bong Chul Kim, Sang Wook Kwon, Ki Young Kim, Dong Zo Kim, Yun Kwon Park, Jae Hyun Park, Keum Su Song, Chi Hyung Ahn, Young Ho Ryu, Byoung Hee Lee
  • Patent number: 9966799
    Abstract: An overvoltage protecting unit and an overcurrent protecting unit protect a power device from an overvoltage and an overcurrent using a comparator having hysteresis. An overtemperature protecting unit protects the power device from an overtemperature using a thermistor having a resistance that changes as a temperature of the thermistor changes.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: May 8, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Zo Kim, Sang Wook Kwon, Yun Kwon Park, Eun Seok Park, Young Tack Hong, Ki Young Kim, Young Ho Ryu, Nam Yun Kim, Jin Sung Choi, Chang Wook Yoon
  • Publication number: 20180102663
    Abstract: An electronic device for charging a battery is provided. The electronic device includes a first path configured to receive a first power of a first voltage from an adapter, a second path configured to receive a second power of a second voltage from the adapter, a charger, connected to the first path, configured to receive the first power, adjust at least one of a voltage or a current of the first power, and provide the adjusted first power to the battery; and a processor configured to control to connect the second path to the battery during fast charging to directly connect the battery to the adapter.
    Type: Application
    Filed: September 27, 2017
    Publication date: April 12, 2018
    Inventors: Ji-Hoon JUNG, Bong-Chul KIM, Pradipta PATRA, Ki-Young KIM, Yun-Kwon PARK
  • Patent number: 9935496
    Abstract: A wireless power transmission system and a method for increasing a coupling efficiency by adjusting a resonant frequency are provided. A device of the wireless power transmission system includes a resonator configured to transmit a wireless power, and a communication unit configured to receive information from another device. The device further includes a controller configured to determine a power transmission efficiency based on the information, and adjust a resonant frequency of the device, a resonant frequency of a relay device, and a resonant frequency of the other device, if the power transmission efficiency is less than or equal to a predetermined reference efficiency.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: April 3, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki Young Kim, Eun Seok Park, Young Ho Ryu, Sang Wook Kwon, Nam Yun Kim, Dong Zo Kim, Yun Kwon Park, Chang Wook Yoon, Jin Sung Choi, Young Tack Hong
  • Publication number: 20180083486
    Abstract: A resonance power transmission system for controlling a supply voltage of a power converter based on power transmission efficiency is provided. According to an aspect, a resonance power transmitter configured to transmit resonance power to one or more resonance power receivers may include: a voltage controller configured to receive an input signal and to output voltage of a predetermined level; a source controller configured to control a signal level of the DC voltage based the number of resonance power receivers.
    Type: Application
    Filed: November 27, 2017
    Publication date: March 22, 2018
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin Sung CHOI, Sang Wook KWON, Yun Kwon PARK, Eun Seok PARK, Young Tack HONG, Young Ho RYU, Nam Yun KIM, Dong Zo KIM
  • Publication number: 20180062450
    Abstract: An interference control method of a power transmitting unit (PTU) includes determining whether the PTU is in an interference environment in which interference by a neighbor PTU occurs, and controlling a communication parameter of either one or both of the neighbor PTU and a power receiving unit (PRU) in response to a result of the determining being that the PTU is in the interference environment.
    Type: Application
    Filed: November 2, 2017
    Publication date: March 1, 2018
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam Yun KIM, Sang Wook KWON, Ki Young KIM, Bong Chul KIM, Yun Kwon PARK, Jae Hyun PARK, Young Ho RYU
  • Patent number: 9906045
    Abstract: A method of synchronization control of a power transmitting unit (PTU) includes network-connecting a PTU to a PTU operating in a slave mode by setting an operation mode of the PTU to a master mode, and transmitting a signal to a power receiving unit (PRU) by controlling either one or both of a communication time and a communication frequency of the PTU operating in the slave mode.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: February 27, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam Yun Kim, Sang Wook Kwon, Hyuk Choon Kwon, Ki Young Kim, Bong Chul Kim, Yun Kwon Park
  • Patent number: 9881733
    Abstract: An apparatus that transmits and receives wireless power, includes a controller configured to determine whether the apparatus is to operate in a power reception mode or a power transmission mode based on a capacity of a battery of the apparatus, and a capacity of a battery of another apparatus. The apparatus further includes a resonator configured to receive power from the other apparatus in response to the apparatus being determined to operate in the power reception mode, and transmit power to the other apparatus in response to the apparatus being determined to operate in the power transmission mode.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: January 30, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam Yun Kim, Sang Wook Kwon, Ki Young Kim, Yun Kwon Park, Chang Wook Yoon
  • Patent number: 9882426
    Abstract: Provided are a method and apparatus for detecting an efficiency of a wireless power transmission. An output power of a source device may be adjusted based on current that is flowing in a power converter of the source device. The efficiency of wireless power transmission may be calculated based on the adjusted output power, and an amount of power used by a target device.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: January 30, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam Yun Kim, Sang Wook Kwon, Yun Kwon Park, Young Tack Hong
  • Publication number: 20180013359
    Abstract: The present disclosure enables materials of a triboelectric charging member to exhibit a characteristic of increased surface charge density, thereby improving output of a triboelectric generating device. Accordingly, the present disclosure provides a triboelectric generating device showing improved output without increasing a size of the triboelectric generating device or without increasing amounts of materials required for the triboelectric generating device.
    Type: Application
    Filed: November 27, 2015
    Publication date: January 11, 2018
    Inventors: Young-jun PARK, Sang-woo KIM, Yun-kwon PARK, Wan chul SEUNG, Hong-joon YOON, Keun young LEE, Jeong hwan LEE, Ju-hyuck LEE
  • Publication number: 20180006488
    Abstract: An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.
    Type: Application
    Filed: September 19, 2017
    Publication date: January 4, 2018
    Applicants: SAMSUNG ELECTRONICS CO., LTD., IUCF-HYU(Industry-University Cooperation Foundation Hanyang University)
    Inventors: Dong Zo KIM, Sang Wook KWON, Ki Young KIM, Nam Yun KIM, Young Jin MOON, Yun Kwon PARK, Keum Su SONG, Chi Hyung AHN, Young Ho RYU, Chang Sik YOO, Chang Wook YOON, Jin Sung CHOI