Patents by Inventor Ki Woong Whang

Ki Woong Whang 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: 9728377
    Abstract: A plasma processing device capable of plasma shaping through magnetic field control includes: a vacuum chamber having an inner space on which a substrate is mounted; an antenna positioned on the upper portion of the chamber and generating plasma in the inner space of the chamber; a magnetic field generation unit including a first magnetic field generation unit disposed on the lower portion of the chamber and including one or more electromagnetic coils and a second magnetic field generation unit including one or more electromagnetic coils disposed on the side of the chamber; and a control unit controlling current input into the electromagnetic coils of the magnetic field generation unit.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: August 8, 2017
    Assignee: Seoul National University R&DB Foundation
    Inventors: Ki Woong Whang, Hee Woon Cheong
  • Publication number: 20160300697
    Abstract: A plasma processing device capable of plasma shaping through magnetic field control includes: a vacuum chamber having an inner space on which a substrate is mounted; an antenna positioned on the upper portion of the chamber and generating plasma in the inner space of the chamber; a magnetic field generation unit including a first magnetic field generation unit disposed on the lower portion of the chamber and including one or more electromagnetic coils and a second magnetic field generation unit including one or more electromagnetic coils disposed on the side of the chamber; and a control unit controlling current input into the electromagnetic coils of the magnetic field generation unit.
    Type: Application
    Filed: November 28, 2014
    Publication date: October 13, 2016
    Applicant: Seoul National University R&DB Foundation
    Inventors: Ki Woong Whang, Hee Woon Cheong
  • Patent number: 8462082
    Abstract: Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: June 11, 2013
    Assignee: SNU R&DB Foundation
    Inventors: Ki-Woong Whang, Ju-Kwang Lee
  • Patent number: 7781976
    Abstract: A flat light source structure includes an upper substrate made of a light transmitting material; a lower substrate separated from the upper substrate by a distance; a barrier rib for maintaining the distance, thereby defining a discharge space filled with a discharge gas; a phosphor coated on at least one of the inner surfaces of the upper substrate and the lower substrate, respectively; a pair of main electrodes disposed at predetermined positions on the surface of the upper or lower substrate and applied with a predetermined driving voltage, frequency and duty ratio to excite the phosphor by plasma generated; an auxiliary electrode formed at a predetermined position on the lower and/or upper substrate(s) to have a parallel component which is parallel with any one of the main electrodes when viewing the discharge space from the upper substrate and a perpendicular component which traverses across the pair of main electrodes.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: August 24, 2010
    Inventors: Ki-Woong Whang, Ju-Kwang Lee
  • Publication number: 20100039040
    Abstract: Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof.
    Type: Application
    Filed: October 20, 2009
    Publication date: February 18, 2010
    Inventors: Ki-Woong Whang, Ju-Kwang Lee
  • Publication number: 20070013618
    Abstract: In a plasma display device and a driving method therefor, address period operation is performed on a first group of first electrodes during at least a part of a period during which a sustain period operation is performed on a second group of first electrodes, and a reset discharge is generated by applying a first voltage to the first group of first electrodes, a second voltage to a plurality of second electrodes, and a third voltage to a plurality of third electrodes so that a first voltage difference between the first voltage and the third voltage is higher than a second voltage difference between the first voltage and the second voltage.
    Type: Application
    Filed: July 18, 2006
    Publication date: January 18, 2007
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Jae-Chul Jung, Ki-Woong Whang
  • Publication number: 20060290267
    Abstract: Disclosed are a new Mercury-free flat light source structure capable of enhancing and adjusting brightness, maintaining stable and uniform discharge, and improving luminous efficiency, and a large flat light source apparatus using the same Mercury-free flat light source structure as a unit cell capable of adjusting the brightness and causing local discharges in selected areas, and a driving method thereof.
    Type: Application
    Filed: April 20, 2006
    Publication date: December 28, 2006
    Applicant: SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATION
    Inventors: Ki-Woong Whang, Ju-Kwang Lee
  • Patent number: 7151510
    Abstract: The present invention is to provide a method and apparatus for driving an AC PDP, where background luminance is reduced and the time required for a reset period is shortened while the stability and an address margin are sufficiently maintained, thus improving reset performance.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: December 19, 2006
    Assignee: Seoul National University Industry Foundation
    Inventors: Ki-Woong Whang, Jin-Ho Yang, Woo-Joon Jung
  • Publication number: 20050116889
    Abstract: The present invention relates to a method of driving an AC-type plasma display panel and plasma display apparatus, in which differences between scan lines are reduced, so that it is advantageous in high-speed driving and it is stable, in which the power consumption is not concentrated on a specific period, so that a power circuit is easily designed, in which the degradation of phosphor and degradation of image quality, such as an afterimage, due to an increase in the temperature of a panel can be prevented, and in which an ability to display low gray scales is improved and pseudo contour noise is easily reduced. In the plasma display panel driving method, the image information has one or more frames each divided into one or more sub-fields used to display gray scales through combinations of the sub-fields. The sub-fields are each divided into one or more driving units T each having an address period, a sustain period and an erase period that are temporally separated.
    Type: Application
    Filed: October 14, 2004
    Publication date: June 2, 2005
    Inventors: Ki-Woong Whang, Jae-Sung Kim
  • Publication number: 20050057443
    Abstract: The present invention is to provide a method and apparatus for driving an AC PDP, where background luminance is reduced and the time required for a reset period is shortened while the stability and an address margin are sufficiently maintained, thus improving reset performance.
    Type: Application
    Filed: December 3, 2003
    Publication date: March 17, 2005
    Applicant: Ki-Woong WHANG
    Inventors: Ki-Woong Whang, Jin-Ho Yang, Woo-Joon Jung
  • Patent number: 6538627
    Abstract: The present invention provides an energy recovery driver circuit for the AC plasma display panel having an enhanced energy recovery efficiency with a short voltage rise and fall period. The energy recovery driver circuit comprises an energy recovery part interposed between the sustain driver circuits for the X1 and X2 electrodes and the other energy recovery part interposed between the sustain driver circuits for Y1 and Y2 electrodes, wherein X1 and Y1 electrodes are respectively defined as electrodes of a first and a second type of electrodes employed in the first AC-PDP cell group, and X2 and Y2 electrodes are respectively defined as electrodes of the first and the second type of electrodes employed in the second AC-PDP cell group. Thus the energy recovery circuit of the present invention utilizes the effect of reducing the load capacitance to a half of its original value, when two (2) loads are serially connected.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: March 25, 2003
    Inventors: Ki Woong Whang, Jin Ho Yang
  • Publication number: 20020047558
    Abstract: The present invention relates to an AC plasma display panel for achieving improved absolute luminance and luminous efficiency at the same time, which comprises a rear substrate formed with separated sub-pixel spaces defined thereon by closed shape barrier ribs for forming color pixels respectively composed of three sub-pixels of red, green and blue phosphor layers disposed in a delta configuration in those sub-pixel spaces, and a front substrate formed with sustain electrodes having projections or wings respectively sticking out or extended over each sub-pixel to face a wing of the neighboring sustain electrode.
    Type: Application
    Filed: March 27, 2001
    Publication date: April 25, 2002
    Inventors: Ki Woong Whang, Cha Keun Yoon
  • Patent number: 6373195
    Abstract: The present invention relates to an AC plasma display panel for achieving improved absolute luminance and luminous efficiency at the same time, which comprises a rear substrate formed with separated sub-pixel spaces defined thereon by closed shape barrier ribs for forming color pixels respectively composed of three sub-pixels of red, green and blue phosphor layers disposed in a delta configuration in those sub-pixel spaces, and a front substrate formed with sustain electrodes having projections or wings respectively sticking out or extended over each sub-pixel to face a wing of the neighboring sustain electrode.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: April 16, 2002
    Inventors: Ki Woong Whang, Cha Keun Yoon
  • Patent number: 5233272
    Abstract: A plasma display panel and driving method thereof is disclosed which has an electrical field disturbing means for disturbing and distorting a discharge region in a discharge cell between an anode and cathode. The disturbing means is formed with an auxiliary electrode, thereby having a floating effect on particles in a main discharge region.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: August 3, 1993
    Assignee: Samsung Electron Devices, Co., Ltd.
    Inventors: Ki-woong Whang, Kyung-cheol Choi