Patents by Inventor Youn-Gyoung Chang

Youn-Gyoung Chang 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: 7796204
    Abstract: An array substrate device includes a gate line formed on a substrate extending along a first direction having a gate electrode, a data line formed on the substrate extending along a second direction having a data pad disposed apart from a first end of the data line, the data and gate lines defining a pixel region, a gate pad formed on the substrate disposed apart from a first end of the gate line, a thin film transistor formed at a crossing region of the gate and data lines and including the gate electrode, a semiconductor layer, a source electrode, and a drain electrode, a black matrix overlapping the thin film transistor, the gate line, and the data line except for a first portion of the drain electrode, a first pixel electrode at the pixel region contacting the first portion of the drain electrode and the substrate, a color filter on the first pixel electrode at the pixel region, and a second pixel electrode on the color filter contacting the first pixel electrode.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: September 14, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Youn-Gyoung Chang, Seung-Ryull Park, Woong-Kwon Kim, Jong-Hwae Lee
  • Publication number: 20100225869
    Abstract: A liquid crystal display device and a fabricating method thereof for simplifying a process are disclosed. In the method of fabricating the liquid crystal display device, a first conductive pattern group including a gate line and a gate electrode, a common line and a common electrode, a pixel electrode and a pad is formed on a substrate. An insulating film including a plurality of contact holes and a semiconductor pattern is formed on the first mask pattern group.
    Type: Application
    Filed: May 21, 2010
    Publication date: September 9, 2010
    Inventors: Byung Chul AHN, Soon Sung Yoo, Oh Nam Kwon, Youn Gyoung Chang, Heung Lyul Cho, Seung Hee Nam
  • Patent number: 7781156
    Abstract: A method of fabricating a printing plate includes: preparing a substrate; forming a metal layer on an entire surface of the substrate; forming a resist pattern on the metal layer, the resist pattern having a fine pattern exposing a portion of the metal layer; wet etching the exposed metal layer, and removing the resist pattern to form a metal layer pattern exposing a portion of the substrate; wet etching the exposed substrate, and removing the metal layer pattern to form a recessed pattern; and forming a compensation layer on an entire surface of the substrate where the recessed pattern is formed.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: August 24, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Youn Gyoung Chang, Heung Lyul Cho
  • Patent number: 7763483
    Abstract: A method of manufacturing an array substrate for a liquid crystal display device includes forming a gate line, a gate pad and a gate electrode on a substrate through a first mask process, forming a data line, a data pad, a source electrode, a drain electrode and an active layer on the substrate including the gate line, the gate pad and the gate electrode through a second mask process, wherein the data line crosses the gate line to define a pixel region, the source electrode is extended from the data line, the drain electrode is spaced apart from the source electrode, and the active layer is disposed between the gate electrode and the source and drain electrodes, forming a passivation layer on an entire surface of the substrate including the data line, the source electrode and the drain electrode through a third mask process, the passivation layer being etched to expose the substrate in the pixel region, a part of the drain electrode, the gate pad and the data pad, and forming a pixel electrode, a gate pad ter
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: July 27, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Youn-Gyoung Chang, Heung-Lyul Cho, Soon-Sung Yoo
  • Patent number: 7760322
    Abstract: An array substrate for a liquid crystal display device includes a gate line and a first storage electrode on a substrate, a data line crossing the gate line to define a first pixel region, a thin film transistor connected to the gate line and the data line, a second storage electrode over the first storage electrode, a first pixel electrode in the first pixel region, the first pixel electrode connected to the thin film transistor and the second storage electrode, the second storage electrode including a first portion over the first storage electrode and a second portion in a second pixel region adjacent to the first pixel region, and a repair pattern for the first pixel region between the second storage electrode and a second pixel electrode in the second pixel region.
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: July 20, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Youn-Gyoung Chang, Heung Lyul Cho, Seung Hee Nam
  • Patent number: 7751021
    Abstract: A liquid crystal display device and a fabricating method thereof for simplifying a process are disclosed. In the method of fabricating the liquid crystal display device, a first conductive pattern group including a gate line and a gate electrode, a common line and a common electrode, a pixel electrode and a pad is formed on a substrate. An insulating film including a plurality of contact holes and a semiconductor pattern is formed on the first mask pattern group. And a second conductive pattern group including a data line, a source electrode and a drain electrode is formed on an insulating film provided with the semiconductor pattern, and exposes an active layer of the semiconductor pattern.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: July 6, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Byung Chul Ahn, Soon Sung Yoo, Oh Nam Kwon, Youn Gyoung Chang, Heung Lyul Cho, Seung Hee Nam
  • Publication number: 20100159695
    Abstract: Disclosed is a method of fabricating a display device. The method includes providing a substrate in which a display region and a pad region formed around the display region are defined, forming a conductive layer on the substrate, forming a mask pattern by rolling a roller on the conductive layer, and patterning the conductive layer using the mask pattern to form a line in the display region and a pad in the pad region. The pad is formed of a pattern having a second width corresponding to a first width of the line.
    Type: Application
    Filed: December 16, 2009
    Publication date: June 24, 2010
    Inventors: Youn Gyoung Chang, Nam Kook Kim
  • Publication number: 20100151606
    Abstract: An array substrate device having a color filter-on thin film transistor (COT) structure for a liquid crystal display device includes a gate line formed on a substrate along a transverse direction, the gate line including a gate pad at one end thereof, a first insulating layer formed on the substrate to cover the gate line, the first insulating layer exposing a first portion of the gate pad, a data line formed over the first insulating layer along a longitudinal direction on the substrate, the data line defining a pixel region with the gate line and including a data pad at one end thereof, a thin film transistor formed at a crossing region of the gate and data lines, the thin film transistor including a gate electrode, a semiconductor layer, a source electrode, and a drain electrode, a black matrix overlapping the thin film transistor, the gate line, and the data line except a second portion of the drain electrode, a second insulating layer formed over an entire surface of the substrate to cover the black matr
    Type: Application
    Filed: December 3, 2009
    Publication date: June 17, 2010
    Inventors: Woong-Kwon Kim, Youn-Gyoung Chang, Seung-Ryull Park
  • Patent number: 7646445
    Abstract: An array substrate device having a color filter-on-thin film transistor (COT) structure for a liquid crystal display device includes a gate line formed on a substrate along a transverse direction, the gate line including a gate pad at one end thereof, a first insulating layer formed on the substrate to cover the gate line, the first insulating layer exposing a first portion of the gate pad, a data line formed over the first insulating layer along a longitudinal direction on the substrate, the data line defining a pixel region with the gate line and including a data pad at one end thereof, a thin film transistor formed at a crossing region of the gate and data lines, the thin film transistor including a gate electrode, a semiconductor layer, a source electrode, and a drain electrode, a black matrix overlapping the thin film transistor, the gate line, and the data line except a second portion of the drain electrode, a second insulating layer formed over an entire surface of the substrate to cover the black matr
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: January 12, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Woong-Kwon Kim, Youn-Gyoung Chang, Seung-Ryull Park
  • Publication number: 20090309810
    Abstract: A large size tiled display device includes a plurality of display panels having an image display part including a plurality of pixels. Each pixel includes at least three sub-pixels. A frame has a plurality of panel receiving portions to receive the plurality of display panels. The frame has an outer wall frame and a partition wall frame, each of which has a vertical surface and an inclined surface extending from the vertical surface that tapers the frame. A light guide plate is formed of a cluster of optical fibers. The light guide plate is disposed on the display panels to reproduce an image formed on the image display part of the display panels. Each optical fiber corresponds to one sub-pixel.
    Type: Application
    Filed: August 20, 2009
    Publication date: December 17, 2009
    Applicant: LG Display Co., Ltd.
    Inventors: Youn-Gyoung Chang, Min-Joo Kim
  • Patent number: 7612838
    Abstract: A thin film transistor array substrate for a liquid crystal display panel includes a gate line formed on a substrate. A data line crosses the gate line, thus defining a pixel region. A gate insulating film is positioned between the data line and the gate line. A thin film transistor is formed at a crossing of the gate line and the data line. A passivation film pattern exposes a portion of a drain electrode of the thin film transistor. At least one protrusion is provided to divide the pixel region into a plurality of regions, each of the regions having a different liquid crystal alignment from the other regions. A pixel electrode is connected to the thin film transistor to cover the pixel region excluding the passivation film pattern and the at least one protrusion.
    Type: Grant
    Filed: October 8, 2004
    Date of Patent: November 3, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Byoung Ho Lim, Soon Sung Yoo, Youn Gyoung Chang, Heung Lyul Cho
  • Publication number: 20090268146
    Abstract: A LCD device and its fabrication method as discussed. According to an embodiment, the LCD device includes a plurality of gate lines and data lines arranged on a substrate to define a plurality of unit pixels; thin film transistors (TFTs) each formed at an intersecting region of the gate lines and the data lines; a plurality of gate pad portions and data pad portions formed at end portions of the gate lines and the data lines, respectively, at least one of the gate and data pad portions being made up of at least two pad unit portions, each pad unit portion having at least one contact hole such that the contact holes of one of the plurality of gate or data pad portions are arranged in a zigzag or an oblique line format; and pixel electrodes formed at the unit pixels.
    Type: Application
    Filed: December 11, 2008
    Publication date: October 29, 2009
    Inventors: Yun-Ho KOOK, Soon-Sung Yoo, Youn-Gyoung Chang, Seung-Hee Nam, Nam-Kook Kim
  • Patent number: 7599034
    Abstract: A thin film transistor substrate structure of a horizontal electric field type LCD comprises a plurality of signal lines including a gate, a data, and a common lines disposed on a substrate; the data line intersecting with the gate and common lines, a gate insulating film disposed between the data line and the gate and common lines, a pixel area being defined by the intersection of the data and gate lines; a thin film transistor disposed at the intersection of the data line and gate line; a common and a pixel electrodes both having a portion extended into the pixel area; a protective film disposed over the substrate and the thin film transistor; and at least one pad structure including an upper pad electrode contacting a lower pad electrode within a first contact hole wherein the upper pad electrode is absent from the upper surface of the protective film.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: October 6, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon-Sung Yoo, Youn-Gyoung Chang, Heung-Lyul Cho
  • Patent number: 7592971
    Abstract: A large size tiled display device includes a plurality of display panels having an image display part including a plurality of pixels. Each pixel includes at least three sub-pixels. A frame has a plurality of panel receiving portions to receive the plurality of display panels. The frame has an outer wall frame and a partition wall frame, each of which has a vertical surface and an inclined surface extending from the vertical surface that tapers the frame. A light guide plate is formed of a cluster of optical fibers. The light guide plate is disposed on the display panels to reproduce an image formed on the image display part of the display panels. Each optical fiber corresponds to one sub-pixel.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: September 22, 2009
    Assignee: LG. Display Co., Ltd.
    Inventors: Youn-Gyoung Chang, Min-Joo Kim
  • Publication number: 20090197362
    Abstract: A method of manufacturing an array substrate for a liquid crystal display device includes forming a gate line, a gate pad and a gate electrode on a substrate through a first mask process, forming a data line, a data pad, a source electrode, a drain electrode and an active layer on the substrate including the gate line, the gate pad and the gate electrode through a second mask process, wherein the data line crosses the gate line to define a pixel region, the source electrode is extended from the data line, the drain electrode is spaced apart from the source electrode, and the active layer is disposed between the gate electrode and the source and drain electrodes, forming a passivation layer on an entire surface of the substrate including the data line, the source electrode and the drain electrode through a third mask process, the passivation layer being etched to expose the substrate in the pixel region, a part of the drain electrode, the gate pad and the data pad, and forming a pixel electrode, a gate pad ter
    Type: Application
    Filed: January 5, 2009
    Publication date: August 6, 2009
    Inventors: Youn-Gyoung Chang, Heung-Lyul Cho, Soon-Sung Yoo
  • Patent number: 7567310
    Abstract: An array substrate device includes a gate line formed on a substrate extending along a first direction having a gate electrode, a data line formed on the substrate extending along a second direction having a data pad disposed apart from a first end of the data line, the data and gate lines defining a pixel region, a gate pad formed on the substrate disposed apart from a first end of the gate line, a thin film transistor formed at a crossing region of the gate and data lines and including the gate electrode, a semiconductor layer, a source electrode, and a drain electrode, a black matrix overlapping the thin film transistor, the gate line, and the data line except for a first portion of the drain electrode, a first pixel electrode at the pixel region contacting the first portion of the drain electrode and the substrate, a color filter on the first pixel electrode at the pixel region, and a second pixel electrode on the color filter contacting the first pixel electrode.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: July 28, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Youn-Gyoung Chang, Seung-Ryull Park, Woong-Kwon Kim, Jong-Hwae Lee
  • Patent number: 7527989
    Abstract: A method for fabricating a liquid crystal display panel is provided. A thin film transistor array substrate and a color filter array substrate are formed. The thin film transistor array substrate includes a screen region having gate lines, data lines, thin film transistors, and pixel electrodes; a pad region having gate pads, an overetch prevention pattern formed overlapped with a gate insulating film in an outer portion of each gate pad, and data pads; data pad protection electrodes each on a respective data pad, and a protection film on an entire surface of the screen region and the pad region. The thin film transistor array substrate and the color filter array substrate are bonded together so that the pad region remains uncovered. Also, a portion of the protection film and the overetch prevention pattern of the pad region are etched to partially expose the gate pads and the data pad protection electrodes, and to form gate holes in the gate insulating film over corresponding gate pads.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: May 5, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Youn Gyoung Chang, Heung Lyul Cho, Seung Hee Nam
  • Patent number: 7528918
    Abstract: A fringe field switching type thin film transistor substrate includes a double layered structure gate line; a data line crossing the gate line, wherein a gate insulating film is formed therebetween; a thin film transistor having a gate electrode connected to the gate line, a source electrode connected to the data line, and a drain electrode opposing the source electrode; a double layered structure common line parallel to the gate line; a common electrode plate integrated with the transparent conductive layer of the common line and formed in a pixel area defined by the crossing of the gate line and the data line; a pixel electrode slit covering the drain electrode of the thin film transistor and overlapping the common electrode plate, wherein the gate insulating film is formed therebetween in the pixel area; and a data protection pattern covering the data line and the source electrode.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: May 5, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Youn Gyoung Chang, Heung Lyul Cho
  • Patent number: 7517620
    Abstract: A method for fabricating an array substrate having a color filter on a thin film transistor structure for a liquid crystal display device is disclosed in the present invention.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: April 14, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Woong-Kwon Kim, Youn-Gyoung Chang
  • Publication number: 20090079681
    Abstract: A liquid crystal display device may include a plurality of LCD modules tiled together and a corresponding microlens on each of the plurality of LCD modules. Each microlens may have a curved portion and a flat portion. Each of the LCD modules may comprise an LCD panel in which a pixel size corresponding to the curved portion of the microlens is smaller than a pixel size corresponding to the flat portion of the microlens. Accordingly, luminance differences are reduced or eliminated.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 26, 2009
    Inventors: Youn Gyoung CHANG, Hyun Suk JIN