Patents by Inventor Woo-Joon Chung

Woo-Joon Chung 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: 8487839
    Abstract: A plasma display panel (PDP) and a method of manufacturing the same, the PDP including scan electrodes extending parallel to one another, sustain electrodes extending parallel to the scan electrodes, and address electrodes extending across the sustain electrodes and the scan electrodes. The address electrodes are divided into a first address electrode group extending from a first side of the panel, and a second address electrode group extending from an opposing second side of the panel, such that the first and second groups are disposed on different sides of the PDP.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: July 16, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Woo-Joon Chung, Tae-Seong Kim
  • Patent number: 8466853
    Abstract: A driving method of a plasma display device according to an exemplary embodiment groups a plurality of address electrodes extending in a first direction into a plurality of groups, and logically divides each of the groups into a plurality of sub-groups. During a first period, a first pulse is sequentially applied to the plurality of groups, and a second pulse is sequentially applied to the plurality of sub-groups included in at least one of the plurality of groups during a second period following the first period. The first and second periods are address periods for sensing in a second direction crossing the first direction.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: June 18, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Tae-Yong Song, Suk-Jae Park, Woo-Joon Chung
  • Patent number: 8362978
    Abstract: A plasma display is disclosed. The display includes driver circuitry which drives the display so that a low level luminance can be generated in a subfield despite high luminance efficient pixels.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: January 29, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Suk-Jae Park, Woo-Joon Chung, Yeon-Sung Jung
  • Patent number: 8193709
    Abstract: A plasma display panel includes a pair of substrates facing each other, barrier ribs defining discharge cells between the pair of substrates, sustain electrodes between the pair of substrates, the sustain electrodes including second bus electrodes along a first direction, the second bus electrodes being on the barrier ribs, scan electrodes between the pair of substrates, the scan electrodes including first bus electrodes along the first direction, the first bus electrodes being positioned between adjacent second bus electrodes, address electrodes between the pair of substrates, the address, scan, and sustain electrodes being configured to generate discharge in the discharge cells, and phosphors in the discharge cells, the phosphors being configured to emit light by the discharge.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: June 5, 2012
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Woo-Joon Chung, Tae-Jun Kim
  • Patent number: 8035579
    Abstract: A plasma display panel (PDP) driving method and a PDP gray-representing method for improving representation performance of low gray scales is disclosed. A voltage rising from a low level voltage to a reset voltage of a reset period of a subsequent subfield is applied to a scan electrode, without having a sustain period, after performing an address operation of the subfield with the minimum weight. The discharge cell selected in the address period of the minimum weight is discharged in an initial part of the gradually rising voltage.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: October 11, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-Sung Kim, Woo-Joon Chung, Seung-Hun Chae, Jin-Boo Son
  • Publication number: 20110128270
    Abstract: A driving method of a plasma display device with reduced black luminance is provided. During at least one TV field without a main reset period, the at least one TV field including a first subfield and a second subfield having a reset waveform in a reset period of the first subfield and the second subfield, respectively, the method includes: applying a first scan low voltage or a first scan high voltage to a scan electrode during an address period of the first subfield; and applying a second scan low voltage or a second scan high voltage to the scan electrode during an address period of the second subfield, wherein the first and the second scan low voltages are maintained at a constant level for a period of time in the first and second subfields, respectively, and the first scan low voltage is different from the second scan low voltage.
    Type: Application
    Filed: August 12, 2010
    Publication date: June 2, 2011
    Inventors: Woo-Joon Chung, Tae-Jun Kim, Ji-Sun Kim
  • Publication number: 20110115692
    Abstract: A plasma display panel (PDP) and a method of manufacturing the same, the PDP including scan electrodes extending parallel to one another, sustain electrodes extending parallel to the scan electrodes, and address electrodes extending across the sustain electrodes and the scan electrodes. The address electrodes are divided into a first address electrode group extending from a first side of the panel, and a second address electrode group extending from an opposing second side of the panel, such that the first and second groups are disposed on different sides of the PDP.
    Type: Application
    Filed: August 25, 2010
    Publication date: May 19, 2011
    Inventors: Woo-Joon Chung, Tae-Seong Kim
  • Patent number: 7936320
    Abstract: A plasma display device includes a plasma display panel (PDP) and a driving method for driving the PDP. The PDP includes discharge cells that are formed by scan electrodes, sustain electrodes, and address electrodes. The driving method divides a frame of the plasma display panel into a plurality of subfields having respective weights in which gray scales are represented by a combination of the subfields. The plurality of subfields are divided into a first group and a second group. In an address period of a subfield of the first having a lowest weight subfield of the plurality of subfields, the method applies a scan voltage and an address voltage respectively to the scan electrode and the address electrode of a discharge cell to be selected from the discharge cells. The scan voltage is applied to the scan electrode and the scan electrode is floated.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: May 3, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Woo-Joon Chung, Jin-Sung Kim, Seung-Hun Chae
  • Publication number: 20110037749
    Abstract: A plasma display is disclosed. The display includes driver circuitry which drives the display so that a low level luminance can be generated in a subfield despite high luminance efficient pixels.
    Type: Application
    Filed: August 2, 2010
    Publication date: February 17, 2011
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Suk-Jae Park, Woo-Joon Chung, Yeon-Sung Jung
  • Publication number: 20110037384
    Abstract: A plasma display panel comprises: a first substrate having a first side; a second substrate having a second side facing the first side of the first substrate; address electrodes, each extending in a first direction; sustain electrodes, each extending in a second direction crossing the first direction; sets of a first scan electrode and a second scan electrode, the sets and the sustain electrodes positioned alternately; first partitions, each extending in the second direction; and second partitions, each extending in the first direction. The second partitions and the address electrodes are positioned alternately. Each of the first and second scan electrodes has a line width narrower than a line width of each of the sustain electrodes. Each of the sets of the first scan electrode and the second scan electrode are positioned on a central region of a discharge cell. Each of the sustain electrodes overlaps each of the partitions.
    Type: Application
    Filed: June 22, 2010
    Publication date: February 17, 2011
    Inventors: Goon-Ho Kim, Woo-Joon Chung
  • Publication number: 20100315378
    Abstract: A plasma display device with touch sensing function includes a display panel having a plurality of first and second electrodes, and third electrodes crossing the first and second electrodes, and first, second and third drivers adapted to drive the first, second and third electrodes in a plurality of subfields including a sensing subfield having a first period and a second period. During the first period, the first driver is adapted to apply a first voltage higher than a reference voltage to the first electrodes, the second driver is adapted to time sequentially apply a second voltage lower than the first voltage to the second electrodes. During the second period, the first driver is adapted to apply a fourth voltage lower than the first voltage to the first electrodes, and the third driver is adapted to time sequentially apply a third voltage higher than the reference voltage to the third electrodes.
    Type: Application
    Filed: January 21, 2010
    Publication date: December 16, 2010
    Inventors: Tae-Yong Song, Suk-Jae Park, Woo-Joon Chung
  • Publication number: 20100315409
    Abstract: A driving method of a plasma display device according to an exemplary embodiment groups a plurality of address electrodes extending in a first direction into a plurality of groups, and logically divides each of the groups into a plurality of sub-groups. During a first period, a first pulse is sequentially applied to the plurality of groups, and a second pulse is sequentially applied to the plurality of sub-groups included in at least one of the plurality of groups during a second period following the first period. The first and second periods are address periods for sensing in a second direction crossing the first direction.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 16, 2010
    Inventors: Tae-Yong Song, Suk-Jae Park, Woo-Joon Chung
  • Patent number: 7825874
    Abstract: An initialization and driving method for a plasma display panel. When the plasma display panel is turned on, a voltage at a first electrode is increased from a first voltage to a second voltage, and a voltage at a second electrode is reduced from a fourth voltage to the fifth voltage for the purpose of forming wall charges in cells while a third voltage is applied to the second electrode. A voltage is applied to the first electrode and the second electrode to establish a difference between the first electrode and the second electrode to be alternately a sixth voltage and a negative voltage of the sixth voltage, and therefore the cell is discharged.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: November 2, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Woo-Joon Chung, Seung-Hun Chae, Jin-Ho Yang, Jin-Sung Kim, Tae-Seong Kim
  • Publication number: 20100207932
    Abstract: A plasma display device and a method of driving the same according to the black load of a displayed image. The plasma display device includes a plurality of first electrodes and a plurality of second electrodes extending in parallel, a plurality of pixels each having a plurality of discharge cells defined by the first and the second electrodes, a driver adapted to apply a first reset waveform to the first electrodes and a second reset waveform to the second electrodes during a reset period, and a controller adapted to adjust at least one of a voltage of the first reset waveform or a voltage of the second reset waveform in accordance with a black load of an image signal corresponding to the plurality of pixels.
    Type: Application
    Filed: December 29, 2009
    Publication date: August 19, 2010
    Inventors: Seung-Won Choi, Tae-Jun Kim, Woo-Joon Chung, Jin-Hee Jung
  • Publication number: 20100171736
    Abstract: A plasma display panel includes electrodes repeatedly disposed on a first substrate in an order of a sustain electrode, a scan electrode, a scan electrode and a sustain electrode, first barrier ribs disposed to overlap the sustain electrodes, and second barrier ribs disposed to overlap the scan electrodes and having a lower height than the first barrier ribs, wherein a space between the first barrier ribs and the second barrier ribs forms a main discharge space, a space between adjacent first barrier ribs forms an auxiliary discharge space, and the scan electrodes are formed to protrude to the auxiliary discharge space.
    Type: Application
    Filed: December 10, 2009
    Publication date: July 8, 2010
    Inventors: Ju-Gon Seok, Woo-Joon Chung, Tae-Jun Kim
  • Patent number: 7737921
    Abstract: Disclosed are a driving device and a driving method for a plasma display panel (PDP). A panel capacitor is formed by a scan electrode and a sustain electrode. The charges are moved from the panel capacitor to a capacitor by turning on a transistor which is connected between the scan electrode and the capacitor. By this method, the voltage of the panel capacitor is steeply reduced so that a discharge is generated in the panel capacitor. When the voltage of the capacitor increases because of the charges moved from the panel capacitor, the gate-source voltage of the transistor is reduced. As a result, the transistor is turned off so that the scan electrode is floated. Accordingly, the discharge is steeply quenched so that the wall charges are precisely controlled. After the capacitor is discharged, the above-noted operation may be repeated.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: June 15, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jin-Sung Kim, Dong-Young Lee, Woo-Joon Chung, Kyoung-Ho Kang, Seung-Hun Chae, Tae-Seong Kim
  • Patent number: 7733304
    Abstract: A plasma display includes a plurality of scan electrodes. A scan voltage is sequentially supplied to the plurality of scan electrodes, and a non-scan voltage that is higher than the scan voltage is supplied to scan electrodes to which the scan voltage is supplied. The non-scan voltage is generated by dividing a voltage that is higher than the non-scan voltage and the scan voltage. Thus, a voltage source for supplying the non-scan voltage can be eliminated.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: June 8, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Seong-Joon Jeong, Jin-Ho Yang, Woo-Joon Chung, Tae-Seong Kim, Suk-Jae Park, Seung-Min Kim
  • Publication number: 20100090599
    Abstract: A plasma display panel that reduces power consumption, improves visual discharge characteristics, and improves dark room contrast includes: sustain electrodes and scan electrodes that comprise transparent electrodes that are disposed having a discharge gap therebetween and bus electrodes formed on the transparent electrodes such that the discharge gap is formed to be nearer one side of a discharge cell and the bus electrode of the scan electrode is disposed near the discharge gap.
    Type: Application
    Filed: October 8, 2009
    Publication date: April 15, 2010
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Seung-Won CHOI, Tae-Jun Kim, Woo-Joon Chung, Goon-Ho Kim
  • Patent number: 7679583
    Abstract: In a plasma display, image data are mapped on N subfields, and the subfield with the greatest weight is determined from among the mapped subfields. When the subfield with the greatest weight is the Kth subfield (K>M), grayscales of the image data are expressed with the mapped data of the (K?M+1)th subfield to the Kth subfield, and the mapped data from the first subfield to the (K?M)th subfield may be ignored.
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: March 16, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Woo-Joon Chung, Jin-Sung Kim, Jin-Ho Yang, Seung-Hun Chae, Tae-Seong Kim
  • Publication number: 20100052529
    Abstract: A plasma display panel with improved power efficiency and visual characteristics and contrast. The plasma display panel includes a first substrate and a second substrate facing the first substrate. A plurality of barrier ribs are on a side of the first substrate facing the second substrate and define a plurality of discharge cells. Sustain electrodes and scan electrodes extend on a side of the second substrate facing the first substrate, and each of the sustain electrodes and the scan electrodes has a bus electrode. One of the scan electrodes forms a discharge gap with a corresponding one of the sustain electrodes, wherein one of the sustain electrodes corresponds to two adjacent rows of discharge cells among the plurality of discharge cells, and the bus electrode of the one of the scan electrodes is adjacent to the discharge gap.
    Type: Application
    Filed: March 12, 2009
    Publication date: March 4, 2010
    Inventors: Tae-Jun Kim, Woo-Joon Chung