Patents by Inventor Heung-Lyul Cho

Heung-Lyul Cho 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: 7639321
    Abstract: A color filter substrate for an LCD device and a method for manufacturing the same, in which process steps are simplified and the manufacturing cost is reduced. The color filter substrate for an LCD device includes a substrate defined by a plurality of color filter regions and a black matrix region, R, G and B color filters respectively formed in the color filter regions of the substrate, a trench formed in the black matrix region of the substrate at a predetermined depth, and a black matrix formed inside the trench by overlapping the color filters.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: December 29, 2009
    Assignee: LG. Display Co., Ltd.
    Inventors: Oh Nam Kwon, Heung Lyul Cho, Seung Hee Nam
  • Patent number: 7636148
    Abstract: The present invention relates to an apparatus and method for repairing a liquid crystal display panel, which is capable of improving a yield thereof by darkening a bright point to minimize a defect ratio thereof. An apparatus for repairing a liquid crystal display panel according to the present invention includes: a liquid crystal display panel including a repair film formed on any one of a first substrate and a second substrate, which are facing to each other with a liquid crystal layer therebetween; and a laser irradiating device to irradiate a laser to the repair film to darken a specific area of the repair film, which is corresponded to an area where a bright point appears in the liquid crystal display panel.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: December 22, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Oh Nam Kwon, Heung Lyul Cho, Seung Hee Nam
  • Publication number: 20090284677
    Abstract: A liquid crystal display device includes a gate line on a substrate; a data line crossing the gate line with a gate insulating film interposed between the gate line and the data line to define a pixel region; a thin film transistor at the crossing of the gate line and the data line; a pixel electrode connected to the thin film transistor; a common electrode forming a horizontal electric field with the pixel electrode in the pixel region; a gate pad connected to the gate line; and a data pad connected to the data line, wherein the gate pad and the data pad includes a lower pad in the same layer as the gate line and made of the same material as the gate line, a lower contact hole through the gate insulating film to expose the lower pad, an upper pad in the same layer as the data line, made of the same material as the data line, and connected to the lower pad through the lower contact hole, and an upper contact hole through a passivation film protecting the thin film transistor to expose the upper pad, and a sem
    Type: Application
    Filed: December 23, 2008
    Publication date: November 19, 2009
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Woo Sup Shin, Joo Soo Lim, Heung Lyul Cho, Hee Young Kwack
  • 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
  • Patent number: 7608541
    Abstract: A method of forming fine pattern includes providing a film, forming a photo-resist pattern on the film, ashing the photo-resist pattern and patterning the film by using the ashed photo-resist pattern as a mask.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: October 27, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Heung Lyul Cho
  • 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
  • Publication number: 20090239342
    Abstract: A thin film transistor substrate of horizontal electric field type includes: a gate line and a first common line formed on a substrate to be in parallel to each other; a data line crossing the gate line and the first common line with a gate insulating film therebetween to define a pixel area; a second common line crossing the first common line having the gate insulating film therebetween; a thin film transistor connected to the gate line and the data line; a common electrode extending from the second common line in said pixel area; a pixel electrode that is parallel to the common electrode and the second common line; a protective film for covering the thin film transistor; a gate pad having a lower gate pad electrode connected to an upper gate pad electrode through a first contact hole; a common pad having a lower common pad electrode connected to an upper common pad electrode through a second contact hole; and a data pad having a lower data pad electrode connected to an upper data pad electrode provided with
    Type: Application
    Filed: May 29, 2009
    Publication date: September 24, 2009
    Inventors: Byung Chul AHN, Oh Nam Kwon, Heung Lyul Cho
  • Publication number: 20090233388
    Abstract: A manufacturing method of an electro line for a liquid crystal display device includes depositing a barrier layer made of a conducting material on a substrate, depositing a copper layer (Cu) on the barrier layer, wet-etching the Cu layer using a first etchant, and dry-etching the barrier layer using a second etchant using the wet-etched Cu layer as an etch mask.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 17, 2009
    Inventors: Oh-Nam Kwon, Kyoung-Mook Lee, Heung-Lyul Cho, Seung-Hee Nam, Cyoo-Chul Jo
  • Patent number: 7576822
    Abstract: A thin film transistor substrate structure for using a horizontal electric field includes a substrate; a gate line and a common line formed parallel with each other from a first conductive layer on the substrate; a gate insulating film formed on the substrate, the gate line and the first common line; a data line formed from a second conductive layer on the gate insulating film, the data line crossing the gate line and the common line to define a pixel area; a thin film transistor connected to the gate line and the data line; a protective film covering the data line and the thin film transistor; a common electrode formed connected to the common line from a third conductive layer, the common electrode being disposed within a first hole through the protective film and the gate insulating film; and a pixel electrode connected to the thin film transistor and formed from a third conductive layer, the pixel electrode being disposed within a second hole through the protective film and the gate insulating film at the
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: August 18, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Heung Lyul Cho
  • Publication number: 20090200558
    Abstract: A method and an apparatus of fabricating a liquid crystal display device adapted to improve a lift-off efficiency are disclosed. The liquid crystal display device is also disclosed. The method includes forming a first thin film on a substrate; forming a photo-resist pattern on the first thin film; etching the first thin film using the photo-resist pattern as a mask; forming a second thin film on the substrate having the photo-resist pattern; forming a plurality of stripper infiltration paths; and removing the photo-resist pattern and the second thin film using a stripper within the stripper infiltration paths. The device includes two substrates facing each other; a liquid crystal layer; data lines and gate lines that cross each other to define pixel regions; thin film transistors; pixel electrodes connected to the thin film transistors; and an inorganic layer in each pixel region, wherein the inorganic layer includes a plurality of cracks.
    Type: Application
    Filed: April 8, 2009
    Publication date: August 13, 2009
    Inventors: Heung Lyul Cho, Oh Nam Kwon, Soon Sung Yoo, Seung Hee Nam
  • Patent number: 7573556
    Abstract: A method of manufacturing an in-plane switching mode liquid crystal display device includes forming an insulation layer on a substrate, patterning a resist layer on the insulation layer, etching the insulation layer to form an insulation layer pattern having tapered edges, forming electrode layers on exposed surfaces of the substrate, the tapered edges, and the resist layer, etching the electrode layers formed on the exposed surfaces and on the resist layer, and removing the resist layer to form the common electrode and the pixel electrode with slopes and that are arranged parallel to each other on the tapered edges of the insulation layer. The common electrode and the pixel electrode each have a width less than 1 ?m, which increases aperture ratio and transmittance.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: August 11, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Heung Lyul Cho
  • 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: 7556988
    Abstract: A thin film transistor substrate of horizontal electric field type includes: a gate line and a first common line formed on a substrate to be in parallel to each other; a data line crossing the gate line and the first common line with a gate insulating film therebetween to define a pixel area; a second common line crossing the first common line having the gate insulating film therebetween; a thin film transistor connected to the gate line and the data line; a common electrode extending from the second common line in said pixel area; a pixel electrode that is parallel to the common electrode and the second common line; a protective film for covering the thin film transistor; a gate pad having a lower gate pad electrode connected to an upper gate pad electrode through a first contact hole; a common pad having a lower common pad electrode connected to an upper common pad electrode through a second contact hole; and a data pad having a lower data pad electrode connected to an upper data pad electrode provided with
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: July 7, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Byung Chul Ahn, Oh Nam Kwon, Heung Lyul Cho
  • Patent number: 7548286
    Abstract: An LCD device and a method for manufacturing the same are disclosed. The LCD device comprises first and second substrates facing each other, a liquid crystal layer formed between the first and second substrates, a pixel region defined on the first and the second substrates, at least one micro hole formed from a rear surface of any one of the first and second substrates in the pixel region, the rear surface being an opposite surface of the substrate with respect to the liquid crystal layer, and a non-transparent material at least partially filled in the micro hole.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: June 16, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Heung Lyul Cho, Seung Hee Nam
  • Patent number: 7531454
    Abstract: A method and an apparatus of fabricating a liquid crystal display device adapted to improve a lift-off efficiency are disclosed. The liquid crystal display device is also disclosed. The method includes forming a first thin film on a substrate; forming a photo-resist pattern on the first thin film; etching the first thin film using the photo-resist pattern as a mask; forming a second thin film on the substrate having the photo-resist pattern; forming a plurality of stripper infiltration paths; and removing the photo-resist pattern and the second thin film using a stripper within the stripper infiltration paths. The device includes two substrates facing each other; a liquid crystal layer; data lines and gate lines that cross each other to define pixel regions; thin film transistors; pixel electrodes connected to the thin film transistors; and an inorganic layer in each pixel region, wherein the inorganic layer includes a plurality of cracks.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: May 12, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Soon Sung Yoo, Oh Nam Kwon, Heung Lyul Cho, Seung Hee Nam
  • 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: 7525619
    Abstract: An apparatus and method for rubbing an alignment layer of an LCD device is disclosed. The alignment layer is rubbed over an entire surface of a substrate at uniform pressure and dust or particle is not adsorbed into the alignment layer during rubbing process. The apparatus for rubbing an alignment layer of an LCD device includes a rubbing means to rub the alignment layer while the rubbing means is rotated along one direction to contact a surface of the alignment layer formed on a substrate, and a liquid jet to jet liquid when the alignment layer is rubbed by the rubbing means.
    Type: Grant
    Filed: April 26, 2006
    Date of Patent: April 28, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Heung Lyul Cho, Soon Sung Yoo, Oh Nam Kwon, Seung Hee Nam
  • Patent number: 7521366
    Abstract: A manufacturing method of an electro line for a liquid crystal display device includes depositing a barrier layer made of a conducting material on a substrate, depositing a copper layer (Cu) on the barrier layer, wet-etching the Cu layer using a first etchant, and dry-etching the barrier layer using a second etchant using the wet-etched Cu layer as an etch mask.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: April 21, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Oh-Nam Kwon, Kyoung-Mook Lee, Heung-Lyul Cho, Seung-Hee Nam, Cyoo-Chul Jo
  • Patent number: 7518698
    Abstract: A thin film transistor array substrate including a gate pattern having a gate electrode, a gate line connected to the gate electrode, and a gate pad connected to the gate line, a source/drain pattern having a source electrode, a drain electrode, a data line connected to the source electrode, and a data pad connected to the data line, a gate insulating pattern formed along a matrix pattern including the gate pattern and the source/drain pattern except for a pixel area, a semiconductor pattern formed on the gate insulating pattern having a same pattern as the gate insulating pattern and partially removed at a thin film transistor area and the gate line area, and a transparent electrode pattern having a pixel electrode formed at the pixel area and connected to the drain electrode, a gate pad protective electrode formed on the gate pad, and a data pad protective electrode formed on the data pad.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: April 14, 2009
    Assignee: LG Display Co., Ltd.
    Inventors: Woong Kwon Kim, Heung Lyul Cho