Patents by Inventor Kyu-Don Lee

Kyu-Don 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).

  • Publication number: 20240109419
    Abstract: The present disclosure relates to a DC-DC converter, a vehicle, and a control method including the same, and more particularly, to a DC-DC converter, a vehicle, and a control method including the same capable of effectively detecting and responding to an interlock failure of a connector.
    Type: Application
    Filed: May 9, 2023
    Publication date: April 4, 2024
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Jae Hun JEONG, Mun Soo CHUNG, Kyu Won JEONG, Tae Woo KIM, Jong Dae KIM, Beom Sik KIM, Sang Don LEE
  • Publication number: 20240097566
    Abstract: A DC-DC converter, a vehicle including the converter, and a controlling method thereof are provided. The DC-DC converter includes a first capacitor connected to a first DC terminal, a second capacitor connected to a second DC terminal, a plurality of converting circuits each including at least an inductor and a plurality of switching elements, and connected to each other in parallel between the first capacitor and the second capacitor, and a controller configured to control an ON/OFF state of the plurality of switching elements provided of each of the converting circuits. When external power connection with respect to each of the first DC terminal and the second DC terminal is disconnected, the controller is configured to control states of the plurality of switching elements to sequentially provide a plurality of different discharge paths between opposite terminals of the second capacitor via the plurality of converting circuits.
    Type: Application
    Filed: July 3, 2023
    Publication date: March 21, 2024
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Beom Sik KIM, Kyu Won JEONG, Tae Woo KIM, Jae Hun JEONG, Mun Soo CHUNG, Sang Don LEE
  • Publication number: 20240097168
    Abstract: A vehicle is provided that includes a DC converter having a first end connected to a fuel cell, a second end connected to a high-voltage battery, and at least one switching element connected between the first end and the second end, a fuel cell control unit which controls an activation state of a running command for start of the fuel cell based on an on-off state of vehicle start, and a converter controller which controls a running state of the DC converter according to an initial start sequence, a shutdown sequence, or a restart sequence for the fuel cell based on the activation state of the running command.
    Type: Application
    Filed: March 8, 2023
    Publication date: March 21, 2024
    Inventors: Beom Sik KIM, Kyu Won JEONG, Tae Woo KIM, Jae Hun JEONG, Mun Soo CHUNG, Sang Don LEE
  • Publication number: 20060022368
    Abstract: To provide a method of fabricating a polyurethane foam with micro pores, and a polishing pad therefrom, the method including steps of (a) adding a nonionic surfactant into at least one of a first ingredient including an isocyanate group-containing compound and a second ingredient including an active hydrogen group-containing compound, (b) agitating and mixing the mixture of the first ingredient and the second ingredient while adding a non-reactive gas thereto, (c) discharging the mixture out of a container at a predetermined rate, and (d) injecting the discharged mixture into a mold so as to form a mold body into a predetermined shape.
    Type: Application
    Filed: November 18, 2003
    Publication date: February 2, 2006
    Inventors: Kyu-Don Lee, Yoon-Jong Cha
  • Patent number: 6738514
    Abstract: A character-recognition system provided in a digital mobile communication terminal, comprises a display, a touch panel for generating pressure signals in response to the pressures applied by the characters written on its surface a touch panel drive for generating coordinate data and touch panel state data from the pressure signals, a character data base for storing character data consisting of shapes and stroke data of the characters, a character-recognition for generating the addresses of the precise character data retrieved from the character data base by recognizing the data of the written characters, a character code storage for storing the character codes corresponding to the character data stored in the character data base, and a controller for delivering the stroke data of the written characters calculated from the coordinate data and touch panel state data to the character-recognition means, wherein the controller retrieves the character codes from the character code storage corresponding to the addre
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: May 18, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jang-Ki Shin, Kyu-Don Lee, Joung-Kyou Park, Jeong-Goo Lee
  • Patent number: 5966314
    Abstract: A finite impulse response filter and its filtering method are disclosed including a first delay portion for delaying input data, a second delay portion for receiving a final delay output from the first delay portion and delaying it, a first ROM bank having a plurality of ROMs for storing filter state values, a second ROM bank having a plurality of ROMs for storing filter state values, a first address generator for generating data as a first address, a second address generator for generating data as a second address, a first multiplexer for sequentially multiplexing the filter state values output from the ROMs of the first ROM bank, a second multiplexer for sequentially multiplexing the filter state values output from the ROMs of the second ROM bank, and an adder for summing the outputs of the first and second multiplexers and outputting the result as filter output data.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: October 12, 1999
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Kyu-Don Lee
  • Patent number: 5822365
    Abstract: A digital complex correlator for a band-spread communication system having a variable correlation length wherein first and second channel input data are multiplied by first and second channel reference data in a multiplier to produce multiplication data. The multiplication data is then accumulated in an accumulator and the outputs from the accumulator are applied to an adder and squaring circuit via a correlation length control circuit.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: October 13, 1998
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Kyu-Don Lee