Patents by Inventor Sang Kyoo Han

Sang Kyoo Han 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).

  • Publication number: 20210407361
    Abstract: The present disclosure provides a display device, which enables minimization of a transformer circuit and which can be driven using various commercial voltages, and a method for controlling the display device. The display device according to an embodiment comprises: a display; a transformer which transforms commercial power and supplies the transformed commercial power to the display and which includes a plurality of switching devices; and a controller for determining, on the basis of the magnitude of an input voltage input to the transformer, whether or not to open at least one of the plurality of switching devices, and controlling the plurality of switching devices on the basis of an output voltage of the transformer to perform a modulation control of the output voltage to follow a predetermined reference voltage.
    Type: Application
    Filed: November 6, 2019
    Publication date: December 30, 2021
    Inventors: Du Hee JANG, Sang-Kyoo HAN, Sang Hoon LEE, Ka San HA
  • Patent number: 10958182
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: March 23, 2021
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Cheol-wan Park, Dong-kyun Ryu, Heung-gyoon Choi
  • Publication number: 20200136518
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Application
    Filed: December 31, 2019
    Publication date: April 30, 2020
    Inventors: Sang-keun JI, Sang-kyoo HAN, Cheol-wan PARK, Dong-kyun RYU, Heung-gyoon CHOI
  • Patent number: 10630191
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: April 21, 2020
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Cheol-wan Park, Dong-kyun Ryu, Heung-gyoon Choi
  • Patent number: 10601326
    Abstract: A flyback converter is provided, which includes a transformer comprising a primary winding and a secondary winding, the transformer for transforming a power inputted from an input power supply and outputting the transformed power, a switching part having one end connected to the primary winding and the other end connected to the input power supply, and an auxiliary circuit including an auxiliary capacitor, and an auxiliary winding coupled to the primary winding. In addition, a clamping diode and a two-series connected switch structure is utilized for the switch stage to relieve the voltage stress of the switch. Accordingly, it is possible to reduce the voltage stress of the switch and also reduce the ripple of the input current which are the causes of EMI.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: March 24, 2020
    Assignees: Korea Aerospace Research Institute, Kookmin University Industry Academy Cooperation Foundation
    Inventors: Na Young Lee, Jae Dong Choi, Sang Kyoo Han, Ju Young Lee
  • Patent number: 10541619
    Abstract: An LLC resonant converter and an electronic device are provided. The LLC resonant converter according to the present disclosure includes a multi input transformer, first and second converter units connected to a primary side of the multi input transformer, an input voltage part, a first balance capacitor, and an output part connected to a secondary side of the multi input transformer.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: January 21, 2020
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Hyun-su Gu, Hyo-hun Kim, Dong-kyun Ryu, Heung-gyoon Choi
  • Patent number: 10505463
    Abstract: An LLC resonant converter and an electronic device are provided. The LLC resonant converter according to the present disclosure includes a multi input transformer, first and second converter units connected to a primary side of the multi input transformer, an input voltage part, a first balance capacitor, and an output part connected to a secondary side of the multi input transformer.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: December 10, 2019
    Assignee: SOLUM CO., LTD.
    Inventors: Sang-keun Ji, Sang-kyoo Han, Hyun-su Gu, Hyo-hun Kim, Dong-kyun Ryu, Heung-gyoon Choi
  • Publication number: 20190363632
    Abstract: A flyback converter is provided, which includes a transformer comprising a primary winding and a secondary winding, the transformer for transforming a power inputted from an input power supply and outputting the transformed power, a switching part having one end connected to the primary winding and the other end connected to the input power supply, and an auxiliary circuit including an auxiliary capacitor, and an auxiliary winding coupled to the primary winding. In addition, a clamping diode and a two-series connected switch structure is utilized for the switch stage to relieve the voltage stress of the switch. Accordingly, it is possible to reduce the voltage stress of the switch and also reduce the ripple of the input current which are the causes of EMI.
    Type: Application
    Filed: May 23, 2019
    Publication date: November 28, 2019
    Applicants: KOREA AEROSPACE RESEARCH INSTITUTE, KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION
    Inventors: Na Young LEE, Jae Dong CHOI, Sang Kyoo HAN, Ju Young LEE
  • Publication number: 20180342953
    Abstract: A transformer and an LLC resonant converter are provided. The transformer includes first and second cores configured to include a pair of outer foots and a middle foot positioned between the outer foots, and to induce a magnetic field formation; first and second inductor winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the first core, and to be connected in series with each other; and first and second transformer winding parts configured to include a conductor surrounding a circumference of each of the pair of outer foots of the second core, wherein the pair of outer foots of the first core face the pair of outer foots of the second core, the middle foot of the first core faces the middle foot of the second core, and the first core and the second core are disposed to be spaced apart from each other.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 29, 2018
    Inventors: Sang-keun JI, Sang-kyoo HAN, Cheol-wan PARK, Dong-kyun RYU, Heung-gyoon CHOI
  • Publication number: 20180342958
    Abstract: An LLC resonant converter and an electronic device are provided. The LLC resonant converter according to the present disclosure includes a multi input transformer, first and second converter units connected to a primary side of the multi input transformer, an input voltage part, a first balance capacitor, and an output part connected to a secondary side of the multi input transformer.
    Type: Application
    Filed: May 4, 2018
    Publication date: November 29, 2018
    Inventors: Sang-keun JI, Sang-kyoo HAN, Hyun-su GU, Hyo-hun KIM, Dong-kyun RYU, Heung-gyoon CHOI
  • Patent number: 9543843
    Abstract: There is provided a power supply device having a primary side and a secondary side isolated from each other. The power supply device includes: a power supply unit converting power from the primary side to output the converted power to the secondary side; a control unit located on the secondary side and acquiring control information on the power supply unit based on a voltage output from the power supply unit; and a delivery unit delivering the control information to the primary side, the delivery unit including a Y-capacitor that provides an EMI noise path between the primary side and the secondary side.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: January 10, 2017
    Assignee: SOLUM CO., LTD.
    Inventors: Tae Won Heo, Hwan Cho, Jeong Gyu Lim, Sang Kyoo Han, Young Seung Noh, Bo Mi Lee
  • Patent number: 9450495
    Abstract: There is provided a single stage forward-flyback converter including a power converting unit switching input power to perform a forward power conversion operation while being switched on and perform a flyback power conversion operation while being switched off, a path providing unit clamping power formed by the forward power conversion operation of the power converting unit and power formed by the flyback power conversion operation thereof to provide power transfer paths, and a controlling unit controlling the power conversion operation of the power converting unit according to a voltage level of the input power.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: September 20, 2016
    Assignee: SOLUM CO., LTD
    Inventors: Sang Kyoo Han, Byoung Woo Ryu, Heung Gyoon Choi, Keun Wook Lee, Hong Sun Park
  • Publication number: 20160079872
    Abstract: In an embodiment of the present invention, a power converter for applying a voltage to a load having at least one channel includes a power supply for storing and outputting a floating voltage lower than a forward voltage of the channel and a converter for receiving and converting a link voltage to generate a first voltage, thereby transmit the voltage higher than the forward voltage of the channel.
    Type: Application
    Filed: September 8, 2015
    Publication date: March 17, 2016
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Dong Kyun RYU, Gie Hyoun KWEON, Sang Kyoo HAN
  • Patent number: 9106147
    Abstract: There is provided a universal power supply apparatus including a power supply unit switching input power into driving power having a preset voltage level and supplying the driving power, a power recognition unit outputting a recognition voltage having a preset voltage level to an output terminal from which the power is output to recognize connection of a device, controlling a power output of the power supply unit according to a detected rated output, and recognizing disconnection of the device after the connection of the device according to a power state of the driving power of the power supply unit, and a detection unit providing a detection voltage having a preset voltage level to the output terminal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 11, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang Kyoo Han, Moon Hwan Keum, Young Seung Noh, Bo Mi Lee
  • Patent number: 9058161
    Abstract: There are provided a universal power supplying apparatus and a universal power supplying method that can be universally used for various types of devices having a variety of voltage and current levels of a driving power. The universal power supplying apparatus includes a power supplying unit that converts an input power into a driving power having a previously set voltage level and supplies the converted power, a power recognizing unit that outputs a recognized voltage having the previously set voltage level to an output terminal from which power is output to recognize connection of a device, and controls a power output of the power supplying unit according to a detected rated output, and a detecting unit that provides a detection voltage having the previously set voltage level to the output terminal.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: June 16, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Young Seung Noh, Sang Kyoo Han, Moon Hwan Keum, Bo Mi Lee
  • Publication number: 20150109832
    Abstract: There is provided a power supply device having a primary side and a secondary side isolated from each other. The power supply device includes: a power supply unit converting power from the primary side to output the converted power to the secondary side; a control unit located on the secondary side and acquiring control information on the power supply unit based on a voltage output from the power supply unit; and a delivery unit delivering the control information to the primary side, the delivery unit including a Y-capacitor that provides an EMI noise path between the primary side and the secondary side.
    Type: Application
    Filed: February 28, 2014
    Publication date: April 23, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Tae Won HEO, Hwan CHO, Jeong Gyu LIM, Sang Kyoo HAN, Young Seung NOH, Bo Mi LEE
  • Publication number: 20150002042
    Abstract: There is provided a power supply apparatus supplying a power to an electronic device, especially, a light emitting diode, capable of stably supplying power to different loads with simple circuit configuration, and maintaining the balance of the current supplied to light emitting diodes.
    Type: Application
    Filed: October 1, 2013
    Publication date: January 1, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jae Kuk KIM, Sang Kyoo HAN, Jin Sik PARK
  • Patent number: 8810213
    Abstract: A power control method for tracking a Maximum Power Point (MPP) in a photovoltaic system including a solar cell and a boost converter. The power control method includes finding the MPP by applying a continuous ON/OFF signal to the boost converter as a first control signal for controlling a duty ratio of the boost converter, and maintaining an operating point of the photovoltaic system at the MPP by applying a second control signal for controlling the duty ratio to the boost converter depending on a constant-voltage command. In tracking an MPP in a photovoltaic system, an MPPT algorithm may remain at the MPP, without self oscillation, improving fast dynamic characteristics upon a change in solar radiation.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: August 19, 2014
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yong-Woo Kim, Sang-Keun Ji, Sung-Soo Hong, Chung-Wook Roh, Sang-Kyoo Han
  • Publication number: 20140184093
    Abstract: There is provided a single stage forward-flyback converter including a power converting unit switching input power to perform a forward power conversion operation while being switched on and perform a flyback power conversion operation while being switched off, a path providing unit clamping power formed by the forward power conversion operation of the power converting unit and power formed by the flyback power conversion operation thereof to provide power transfer paths, and a controlling unit controlling the power conversion operation of the power converting unit according to a voltage level of the input power.
    Type: Application
    Filed: June 27, 2013
    Publication date: July 3, 2014
    Inventors: Sang Kyoo HAN, Byoung Woo RYU, Heung Gyoon CHOI, Keun Wook LEE, Hong Sun PARK
  • Publication number: 20140159696
    Abstract: There is provided a universal power supply apparatus including a power supply unit switching input power into driving power having a preset voltage level and supplying the driving power, a power recognition unit outputting a recognition voltage having a preset voltage level to an output terminal from which the power is output to recognize connection of a device, controlling a power output of the power supply unit according to a detected rated output, and recognizing disconnection of the device after the connection of the device according to a power state of the driving power of the power supply unit, and a detection unit providing a detection voltage having a preset voltage level to the output terminal.
    Type: Application
    Filed: March 15, 2013
    Publication date: June 12, 2014
    Applicants: Kookmn University Industry Academy Cooperation Foundation, SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: SANG KYOO HAN, Moon Hwan KEUM, Young Seung NOH, Bo Mi LEE