Patents by Inventor Won-Seok Nam

Won-Seok Nam 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: 11931978
    Abstract: An anti-icing honeycomb core composite manufactured by forming an electromagnetic wave absorption layer by using dielectric fiber, molding the electromagnetic wave absorption layer into a honeycomb core structure by using a molded part including a first base, a second base, and an inner block, hardening the honeycomb core structure, and removing the molded part. The molding step includes first stacking, on the first base including a plurality of grooves in which the inner blocks each having a hexagonal column shape are able to be seated, a plurality of the inner blocks and a plurality of the electromagnetic wave absorption layers as the honeycomb core structure so that the electromagnetic wave absorption layer is disposed between the plurality of inner blocks, and second stacking covering the inner blocks and the electromagnetic wave absorption layers stacked on the first base with the second base having the same shape as the first base.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: March 19, 2024
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITY
    Inventors: Young Woo Nam, Hyeon Seok Choe, Jin Hwe Kweon, Rho Shin Myong, Won Ho Choi
  • Publication number: 20240014658
    Abstract: According to an embodiment, the present invention may comprise: an input unit which receives a required power value and a reference voltage value from an inverter and receives a link voltage value from a direct current link capacitor; and a control unit which calculates a slope of a droop control curve according to the reference voltage value and the required power value, calculates an output power value by substituting a difference value between the link voltage value and the reference voltage value into the slope, and calculates a target current value according to the output power value.
    Type: Application
    Filed: August 31, 2021
    Publication date: January 11, 2024
    Inventors: Heo Kyoung PARK, Won Seok NAM, Jong Hyun LEE
  • Patent number: 9385526
    Abstract: Disclosed is an inrush current suppressor circuit of a power supply circuit that supplies stand-by voltage from AC voltage. At a stand-by mode, only a diode and a resistor for suppressing inrush current are provided, and a capacitor provided in common between a stand-by power supply part and a start-up power supply part is charged, so that the inrush current is suppressed at both of stand-by and start-up modes and the number of devices of a circuit and power consumption are reduced.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: July 5, 2016
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Won Seok Nam
  • Patent number: 9006929
    Abstract: A power supply device is provided. The power supply device includes: an AC power output unit storing and outputting an AC power; a rectifier unit rectifying an output of the AC power output unit; a DC output unit outputting an output from the rectifier unit as a DC power; and a standby power reduction unit detecting a signal regarding whether the AC power is inputted or not and discharging a standby power stored in the AC power output unit in response to the detected signal.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: April 14, 2015
    Assignee: LG Innotek Co., Ltd.
    Inventor: Won Seok Nam
  • Publication number: 20150043257
    Abstract: Disclosed is an inrush current suppressor circuit of a power supply circuit that supplies stand-by voltage from AC voltage. At a stand-by mode, only a diode and a resistor for suppressing inrush current are provided, and a capacitor provided in common between a stand-by power supply part and a start-up power supply part is charged, so that the inrush current is suppressed at both of sand-by and start-up modes and the number of devices of a circuit and power consumption are reduced.
    Type: Application
    Filed: November 21, 2012
    Publication date: February 12, 2015
    Inventor: Won Seok Nam
  • Publication number: 20120161522
    Abstract: A power supply device is provided. The power supply device includes: an AC power output unit storing and outputting an AC power; a rectifier unit rectifying an output of the AC power output unit; a DC output unit outputting an output from the rectifier unit as a DC power; and a standby power reduction unit detecting a signal regarding whether the AC power is inputted or not and discharging a standby power stored in the AC power output unit in response to the detected signal.
    Type: Application
    Filed: September 26, 2011
    Publication date: June 28, 2012
    Applicant: LG INNOTEK CO., LTD.
    Inventor: Won Seok Nam
  • Patent number: 7612738
    Abstract: A plasma display device includes first to fourth transistors and a plurality of first electrodes. A first terminal of a first capacitor is connected to a power supply supplying a voltage. A second terminal of a second capacitor connected to a second terminal of the first capacitor is connected to a ground terminal. A first diode is connected to the first electrodes through a first inductor and a fifth transistor, which forms a voltage rising path. A second diode is connected to the first electrodes through a second inductor and a sixth transistor, which forms a voltage falling path. A third diode is connected to the third transistor and the second diode, which forms a voltage sustaining path during a voltage rising period. A fourth diode is connected to the second transistor and the first diode, which forms a voltage sustaining path of a voltage falling period.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: November 3, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Hak-Cheol Yang, Joon-Yeon Kim, Jong-Ki Choi, Hyun-Gu Heo, Yong-Jin Jeong, Suk-Chin Sakong, Sung-Soo Hong, Chung-Wook Roh, Sang-Kyoo Han, Won-Seok Nam, Yon-Goo Park
  • Publication number: 20080088531
    Abstract: A plasma display device includes first to fourth transistors and a plurality of first electrodes. A first terminal of a first capacitor is connected to a power supply supplying a voltage. A second terminal of a second capacitor connected to a second terminal of the first capacitor is connected to a ground terminal. A first diode is connected to the first electrodes through a first inductor and a fifth transistor, which forms a voltage rising path. A second diode is connected to the first electrodes through a second inductor and a sixth transistor, which forms a voltage falling path. A third diode is connected to the third transistor and the second diode, which forms a voltage sustaining path during a voltage rising period. A fourth diode is connected to the second transistor and the first diode, which forms a voltage sustaining path of a voltage falling period.
    Type: Application
    Filed: March 28, 2007
    Publication date: April 17, 2008
    Inventors: Hak-Cheol Yang, Joon-Yeon Kim, Jong-Ki Choi, Hyun-Gu Heo, Yong-Jin Jeong, Suk-Chin Sakong, Sung-Soo Hong, Chung-Wook Roh, Sang-Kyoo Han, Won-Seok Nam, Yon-Goo Park