Patents by Inventor Hak Kyu Lee

Hak Kyu Lee 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: 10879701
    Abstract: The present invention relates to a power conditioning system (PCS) efficiency-considered microgrid operation device comprising: a scheduling unit for scheduling outputs of a controllable load, a battery, and an emergency internal combustion generator operated in a microgrid; and an operation control unit for controlling the operation of the battery, the emergency internal combustion generator, and the controllable load according to charging/discharging of the battery, the output or the emergency internal combustion generator, and the output of the controllable load, which have been scheduled by the scheduling unit, wherein the scheduling unit schedules charging/discharging by considering the efficiency of a PCS such that a mate of charge (SOC) of the battery is maintained within a preset range. According to the present invention, the microgrid can be efficiently operated by considering the charging/discharging efficiency of the PCS.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: December 29, 2020
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Woo-Kyu Chae, Hak-Ju Lee, Jung-Sung Park, Jong-Nam Weon, Jun-Bo Sim
  • Patent number: 10769745
    Abstract: Disclosed is a 3D mesh model watermarking method using a divisional scheme. The method of inserting a watermark into a three-dimensional (3D) mesh model includes: calculating a geometric primitive of the 3D mesh model; dividing the 3D mesh model into a plurality of mesh segments by using the geometric primitive; converting the mesh segments into mesh segments of a vertex distance-based coordinate system; inserting a predetermined watermark into each of the mesh segments of the vertex distance-based coordinate system; and restoring the mesh segments into which the watermark is inserted to a Cartesian coordinate system.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 8, 2020
    Assignee: The Korea Advanced Institute of Science and Technology
    Inventors: Heung-Kyu Lee, Han-Ul Jang, Hak-Yeol Choi, Jeongho Son, Seung-Min Mun, Dongkyu Kim, Jong-Uk Hou, Wookhyung Kim
  • Patent number: 10752092
    Abstract: The present invention relates to a vehicular heat pump system and, more specifically, to a vehicular heat pump system having a chiller for heat exchanging cooling water circulating through vehicle electrical equipment (200), a refrigerant discharged from an outdoor heat exchanger so as to flow through a first bypass line (R1), and a refrigerant discharged from an indoor heat exchanger, thereby: in the air conditioner mode, increasing sub-cool while the refrigerant discharged from the indoor heat exchanger is first cooled at the chiller and then is second cooled at the outdoor heat exchanger such that the flow rate of refrigerants increases and cooling performance is improved; in the heat pump mode, allowing the refrigerant discharged from the indoor heat exchanger to ensure sub-cool in the chiller so as to increase the flow rate of refrigerants, and allowing the refrigerant discharged from the outdoor heat exchanger to receive an additional heating source from the chiller so as to improve heating performance;
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: August 25, 2020
    Assignee: HANON SYSTEMS
    Inventors: Young Ho Choi, Chan Joo Maeng, Seung Ho Lee, Jung Jae Lee, Hak Kyu Kim, Sung Ho Kang, Jae Min Lee
  • Patent number: 10744850
    Abstract: The present invention relates to a heat pump system for a vehicle. The heat pump system includes a refrigerant-coolant heat exchanger for exchanging heat between refrigerant circulating through a refrigerant circulation line and coolant circulating through electronic units of the vehicle. The heat pump system can operate the heat pump mode even though outdoor air temperature is zero or lower or frosting is formed on the external heat exchanger because waste heat of the electronic units is retrieved through the refrigerant-coolant heat exchanger, thereby further enhancing heating performance and efficiency.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: August 18, 2020
    Assignee: HANON SYSTEMS
    Inventors: Sung Ho Kang, Hak Kyu Kim, Jae Min Lee, Jung Jae Lee, Young Ho Choi
  • Publication number: 20200238789
    Abstract: The present invention relates to an air conditioner for a vehicle having a rear seat outlet, which can relieve temperature inversion that discharge temperature of the console vent becomes higher than discharge temperature of a rear seat floor vent in a bi-level mode, and prevent reduction of air volume of the console vent in the cooling mode. The air conditioner for a vehicle, which has a rear seat outlet, includes an air-conditioning case having an air passageway formed therein and a plurality of air outlets, and a cooling heat exchanger and a heating heat exchanger disposed in the air passageway of the air-conditioning case to exchange heat with air passing through the air passageway, wherein the air outlets include a console vent and a rear seat floor vent, and an entrance of the rear seat floor vent is formed above an entrance of the console vent.
    Type: Application
    Filed: January 28, 2020
    Publication date: July 30, 2020
    Inventors: Yong Ho KIM, Chul Hee Kim, Hak Kyu Kim, Byeong Ha Lee, Yong Seon Lee, Jun Min Lee, Jae O Jung, Jae Won Jeong
  • Publication number: 20200154042
    Abstract: A light field imaging system includes a lens configured to collect light transmitted from an object; a polarizer configured to polarize the light; a polarization switching unit configured to repeatedly switch the polarization direction of the light in first and second polarization directions; first and second polarization dependent lens arrays configured to operate as a lens when the polarization direction of the light is the first and second polarization direction, respectively, and having a staggered arrangement; an image sensor configured to obtain a first image from the light collected by the first polarization dependent lens array and obtain a second image from the light collected by the second polarization dependent lens array; and an image processing unit configured to combine the first image and the second image to generate a high resolution image having higher resolution than the first image and the second image.
    Type: Application
    Filed: November 8, 2019
    Publication date: May 14, 2020
    Inventors: Hak-Rin KIM, Min-Kyu PARK, Tae-Hyun LEE
  • Publication number: 20200150894
    Abstract: A storage device including: a memory controller configured to output user data received from outside of the storage device in a write operation mode and receive read data in a read operation mode; and a memory device including a memory cell array and a random input and output (I/O) engine, the random I/O engine configured to encode the user data provided from the memory controller using a random I/O code, in the write operation mode, and to generate the read data by decoding internal read data read by a data I/O circuit from the memory cell array using the random I/O code, in the read operation mode.
    Type: Application
    Filed: August 6, 2019
    Publication date: May 14, 2020
    Inventors: SANG-KIL LEE, Chang-kyu Seol, Dae-hyun Kim, Jin-min Kim, Hei-seung Kim, Hyun-mog Park, Hyun-sik Park, Hak-yong Lee
  • Publication number: 20200094653
    Abstract: The present invention relates to a coolant heater comprising: a heating element for heating coolant; a first housing for accommodating the heating element; a cover plate for sealing the first housing in which the heating element is accommodated; a temperature fuse provided in an external space formed by coupling the first housing and the cover plate, and disposed to be adjacent to the cover plate; and a second housing for pressing the temperature fuse so as to pressurize the same toward the cover plate, wherein overheat sensing responsiveness of the heating element is improved such that the overheat of the heating element can be prevented, and failure factors in a part in which the temperature fuse is coupled are reduced such that a durability is improved.
    Type: Application
    Filed: August 22, 2018
    Publication date: March 26, 2020
    Applicants: Hanon Systems, DAEWOO ELECTRONIC COMPONENTS CO., LTD.
    Inventors: Kil Sang JANG, Ji Hoon PARK, Jeong Hyun SON, Man Ok LEE, Bok Sun KANG, Young Chul KIM, Hak Kyu KIM, Yong Jin MOON, Seung Ho LEE, Hyun Seok JUNG, Kyung Seok CHO, Yong Ha CHAE
  • Publication number: 20190322155
    Abstract: The heater module includes a fluid pump including a pump inlet configured to introduce cooling water thereinto, a pump outlet configured to pressurize and discharge the introduced cooling water, cooling water heating heater including a heater inlet configured to introduce thereinto the cooling water discharged from the pump outlet of the fluid pump, a heating unit configured to heat the introduced cooling water, a heater outlet configured to discharge the heated cooling water, a flow channel switch valve for switching a circulation flow channel of the cooling water, wherein the fluid pump is integrally formed with one side of the cooling water heating heater to embody both a heating mode and a battery temperature-rising mode by one heater module for heating cooling water. Thus, a connection hose for connection components is removed or a length thereof is minimized, a fluid pump and a valve housing are reduced, thereby reducing costs.
    Type: Application
    Filed: April 19, 2019
    Publication date: October 24, 2019
    Inventors: In Hyeok KIM, Jung Jae LEE, Jae Yeong JU, Young Chul KIM, Hak Kyu KIM, Hyuk KIM, Jong Du LEE
  • Patent number: 10438311
    Abstract: In a watermark embedding method and apparatus, a layered three-dimensional model is aligned in a printing direction based on a layering direction of the layered three-dimensional model. Then, a watermark having a predetermined pattern is embedded into the aligned three-dimensional model in a direction orthogonal to the printing direction so that the embedded watermark is not associated with the printing direction.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: October 8, 2019
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Heung-Kyu Lee, Jong-Uk Hou, Hak-Yeol Choi, Hyun-Ji Song, Do-Gon Kim, Han-Ul Jang
  • Patent number: 10425995
    Abstract: A positive temperature coefficient heater includes PTC elements embedded in adjacent heat rods, the PTC elements of the adjacent heat rods include center lines mismatched with each other and configured to minimize regions in which the PTC elements are overlapped with each other in the heat rods in which a plurality of PTC elements spaced apart from each other so as to form columns and rows and arranged in a single layer are embedded.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: September 24, 2019
    Assignee: HANON SYSTEMS
    Inventors: Hak Kyu Kim, Sung Ho Kang, Sang Ki Lee, Jung Jae Lee, Jae Min Lee, Young Ho Choi, Sung Young Lee
  • Publication number: 20190225050
    Abstract: The present invention relates to a heat pump system for a vehicle. The heat pump system includes a refrigerant-coolant heat exchanger for exchanging heat between refrigerant circulating through a refrigerant circulation line and coolant circulating through electronic units of the vehicle. The heat pump system can operate the heat pump mode even though outdoor air temperature is zero or lower or frosting is formed on the external heat exchanger because waste heat of the electronic units is retrieved through the refrigerant-coolant heat exchanger, thereby further enhancing heating performance and efficiency.
    Type: Application
    Filed: April 2, 2019
    Publication date: July 25, 2019
    Inventors: Sung Ho KANG, Hak Kyu KIM, Jae Min LEE, Jung Jae LEE, Young Ho CHOI
  • Publication number: 20190210430
    Abstract: A heat pump system including a compressor mounted on a refrigerant circulation line for compressing and discharging refrigerant. An internal heat exchanger is mounted inside an air-conditioning case. An evaporator is mounted inside the air-conditioning case. An external heat exchanger is mounted outside the air-conditioning case. Refrigerant discharged from the internal heat exchanger is selectively expanded between the internal heat exchanger and the external heat exchanger. Refrigerant is also expanded along the refrigerant circulation line at an inlet side of the evaporator. A coolant circulation line is configured to circulate coolant toward electronic units of the vehicle. A refrigerant-coolant heat exchanger is configured to exchange heat between the refrigerant flowing the refrigerant circulation line and the coolant circulating through the coolant circulation line.
    Type: Application
    Filed: March 15, 2019
    Publication date: July 11, 2019
    Inventors: Young Ho CHOI, Sung Ho KANG, Hak Kyu KIM, Seung Ho LEE, Jae Min LEE, Jung Jae LEE
  • Publication number: 20190207376
    Abstract: The present invention provides a system and a method for switching a line short-circuit fault section in an inverter-based stand-alone microgrid, the system comprising: multiple intelligent switchgears disposed on a line in a stand-alone microgrid so as to control opening or closing of the line; a battery inverter having a built-in current limiter so as to limit a current output therefrom; and an operating system for receiving short-circuit fault information of the line from the multiple intelligent switchgears, determining a fault section, and controlling the battery inverter to limit the output current. The present invention can quickly and accurately switch a line short-circuit fault section occurring in a stand-alone microgrid which does not include separate cutoff equipment such as a recloser.
    Type: Application
    Filed: November 14, 2016
    Publication date: July 4, 2019
    Inventors: Jong-Nam WEON, Woo-Kyu CHAE, Hak-Ju LEE, Jung-Sung PARK, Jun-Bo SIM
  • Publication number: 20190207315
    Abstract: An antenna and a method of manufacturing the antenna. The antenna includes an antenna structure, and a metamaterial that has a high dielectric constant and that includes metal patterns arranged at regular intervals.
    Type: Application
    Filed: July 27, 2018
    Publication date: July 4, 2019
    Inventors: Won Kyu CHOI, Jonghwa SHIN, Hak-Ju LEE, MI HYUN KIM, Taeyong CHANG, Sunghoon HONG
  • Publication number: 20190181644
    Abstract: The present invention relates to a power conditioning system (PCS) efficiency-considered microgrid operation device comprising: a scheduling unit for scheduling outputs of a controllable load, a battery, and an emergency internal combustion generator operated in a microgrid; and an operation control unit for controlling the operation of the battery, the emergency internal combustion generator, and the controllable load according to charging/discharging of the battery, the output of the emergency internal combustion generator, and the output of the controllable load, which have been scheduled, by the scheduling unit, wherein the scheduling unit schedules charging/discharging by considering the efficiency of a PCS such that a state of charge (SOC) of the battery is maintained within a preset range. According to the present invention, the microgrid can be efficiently operated by considering the charging/discharging efficiency of the PCS.
    Type: Application
    Filed: November 11, 2016
    Publication date: June 13, 2019
    Inventors: Woo-Kyu CHAE, Hak-Ju LEE, Jung-Sung PARK, Jong-Nam WEON, Jun-Bo SIM
  • Publication number: 20190181643
    Abstract: The present invention relates to a method for controlling the frequency of a stand-alone microgrid wherein an energy storage device of the stand-alone microgrid is operated as a main power source by controlling a battery power conditioning system (PCS) of the stand-alone microgrid in a constant voltage constant frequency (CVCF) mode. According to the present invention, it is possible to operate the frequency stably while considering the fuel cost and power generation efficiency of a stand-alone microgrid.
    Type: Application
    Filed: November 14, 2016
    Publication date: June 13, 2019
    Inventors: Woo-Kyu CHAE, Hak-Ju LEE, Jung-Sung PARK, Jong-Nam WEON, Jun-Bo SIM
  • Patent number: 10293659
    Abstract: The present invention relates to a heat pump system for a vehicle. The heat pump system includes a refrigerant-coolant heat exchanger for exchanging heat between refrigerant circulating through a refrigerant circulation line and coolant circulating through electronic units of the vehicle. The heat pump system can operate the heat pump mode even though outdoor air temperature is zero or lower or frosting is formed on the external heat exchanger because waste heat of the electronic units is retrieved through the refrigerant-coolant heat exchanger, thereby further enhancing heating performance and efficiency.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: May 21, 2019
    Assignee: HANON SYSTEMS
    Inventors: Sung Ho Kang, Hak Kyu Kim, Jae Min Lee, Jung Jae Lee, Young Ho Choi
  • Patent number: 10291023
    Abstract: The present invention relates to an inverter device for a microgrid, and a method for controlling the same, the inverter device including: a waveform detector detecting a voltage waveform and a current waveform applied to a load; a control unit determining whether a sine wave appears based on the detected voltage waveform and the detected current waveform and performing voltage control or low order harmonic compensation depending on a determination result; and a switch generating a voltage waveform in a form of the sine wave by being turned on/off depending on a control signal received from the control unit and supplying the generated voltage waveform in the form of the sine wave to the load.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: May 14, 2019
    Assignee: KOREA ELECTRIC POWER CORPORATION
    Inventors: Woo-Kyu Chae, Hak-Ju Lee, Jong-Nam Won, Il-Keun Song, Jung-Sung Park, Sung-Wook Hwang
  • Patent number: 9817190
    Abstract: Provided are a tunable wavelength filter with an embedded metal temperature sensor and an external-cavity type tunable wavelength laser module. In detail, the tunable wavelength filter with an embedded metal temperature sensor and the external-cavity type tunable wavelength laser module achieve wavelength stability by forming a metal temperature sensor using a resistance change of a metal thin film according to temperature on a point on an isothermal layer having the same temperature distribution as the optical waveguide during a process for fabricating the optical waveguide with polymer to accurately measure a temperature of an optical waveguide.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: November 14, 2017
    Assignees: ChemOptics Inc., Solidsystems Inc.
    Inventors: Hak Kyu Lee, Jun Kyu Seo, Woo Jin Lee, Kyoung Min Kim