Patents by Inventor Sang Hee Yu

Sang Hee Yu 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).

  • Publication number: 20090109363
    Abstract: The present invention relates to a liquid crystal display panel and a method for fabricating the same which can improve aperture and prevent a brightness deviation between lots. The liquid crystal display panel includes a thin film transistor formed on a lower substrate and connected to a gate line and a data line, a pixel electrode connected to a drain electrode of the thin film transistor, a common electrode forming a horizontal electric field with the pixel electrode, a connection electrode overlapped with and connected to the data line, and a black matrix on an upper substrate opposite to the lower substrate for forming a vertical electric field with the connection electrode.
    Type: Application
    Filed: October 29, 2008
    Publication date: April 30, 2009
    Inventors: Sang Hee Yu, Joon Dong Lee, Deuk Su Lee
  • Patent number: 7354784
    Abstract: A method for fabricating a color-filter on transistor (COT) type LCD device, to improve the yield by simplifying the fabrication process with diffraction exposure, which includes the steps of forming a gate line, a gate electrode, a gate pad and a data pad on a substrate; depositing a gate insulating layer and an active layer; forming a data line intersecting the gate line to define a unit pixel region, source and drain electrode on the active layer, and first and second connection conductive layers forming an insulating interlayer on the remaining portions except the first and second connection conductive layers and the drain electrode; forming a color filter layer and a black matrix layer on the insulating interlayer; forming an overcoat layer on the remaining portions of the color filter layer except the first and second connection conductive layers and the drain electrode.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: April 8, 2008
    Assignee: LG. Philips LCD. Co., Ltd
    Inventors: Seung Ryull Park, Sang Hee Yu
  • Patent number: 7354807
    Abstract: A liquid crystal display panel and a fabricating method thereof for reducing the number of data lines and the capacitance of a parasitic capacitor between pixel electrodes are disclosed. A first switching part has at least two thin film transistors for applying a first pixel signal that is supplied to a first data line to a first pixel electrode under control of the second control line and the gate line. A second switching part has at least two thin film transistors for applying a second pixel signal supplied to the second data line to the second pixel electrode under control of the first control line and the gate line. A turn-on current value of wither of the two thin film transistors, in each of the first and second switching parts, is more than that of the other thin film transistor.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: April 8, 2008
    Assignee: LG.Philips LCD Co., Ltd
    Inventors: Sang Hee Yu, Won Seok Kang
  • Publication number: 20070229429
    Abstract: A liquid crystal display device includes data lines and gate lines on a substrate intersecting each other to define a plurality of pixel areas; a plurality of liquid crystal cells formed in respective pixel areas; a data driver that generates a positive and a negative data signals, the data driver supplies desired data signals to the data lines; a gate driver that supplies a scan signal to the gate lines, wherein a voltage level of the scan signal is changed in accordance with a polarity of the data signal; and a plurality of thin film transistors formed at respective intersections of gate lines and data lines, the thin film transistor supplying the data signal to the liquid crystal cell in response to the scan signal.
    Type: Application
    Filed: December 5, 2006
    Publication date: October 4, 2007
    Inventors: Sang Hee Yu, Sang Yeup Lee
  • Publication number: 20070153143
    Abstract: The present invention relates to an array substrate for a liquid crystal display (LCD) and a manufacturing method thereof. The array substrate comprises gate lines crossing data lines on a transparent substrate to define pixel areas; thin film transistors connected to a gate line and a data line; pixel electrodes overlapping the gate and data lines, the pixel electrodes being connected to one of the thin film transistors through a contact hole, and stretched over two adjacent pixel areas to form an electric field; and storage electrodes overlapping with the gate lines, connected to a pixel electrode through a contact hole, wherein the storage electrodes maintain an intensity of the electric field formed by the pixel electrodes at a level equal to or higher than a predetermined level.
    Type: Application
    Filed: December 12, 2006
    Publication date: July 5, 2007
    Inventor: Sang Hee Yu
  • Patent number: 7138656
    Abstract: A liquid crystal display panel and a fabricating method thereof for reducing the number of data lines and the capacitance of a parasitic capacitor between pixel electrodes are disclosed. A first switching part has at least two thin film transistors for applying a first pixel signal that is supplied to a first data line to a first pixel electrode under control of the second control line and the gate line. A second switching part has at least two thin film transistors for applying a second pixel signal supplied to the second data line to the second pixel electrode under control of the first control line and the gate line. A turn-on current value of wither of the two thin film transistors, in each of the first and second switching parts, is more than that of the other thin film transistor.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: November 21, 2006
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Sang Hee Yu, Won Seok Kang
  • Publication number: 20060022202
    Abstract: A liquid crystal display panel and a fabricating method thereof for reducing the number of data lines and the capacitance of a parasitic capacitor between pixel electrodes are disclosed. A first switching part has at least two thin film transistors for applying a first pixel signal that is supplied to a first data line to a first pixel electrode under control of the second control line and the gate line. A second switching part has at least two thin film transistors for applying a second pixel signal supplied to the second data line to the second pixel electrode under control of the first control line and the gate line. A turn-on current value of wither of the two thin film transistors, in each of the first and second switching parts, is more than that of the other thin film transistor.
    Type: Application
    Filed: June 28, 2005
    Publication date: February 2, 2006
    Inventors: Sang Hee Yu, Won Seok Kang
  • Patent number: 6522377
    Abstract: A transflective liquid crystal display device includes: an upper substrate and a lower substrate opposing each other; a lower transparent electrode formed on the lower substrate; a passivation layer formed on the lower transparent electrode; a reflective electrode formed on the passivation layer, the reflective electrode having an open hole formed passing through the passivation layer such that a portion of the lower transparent electrode is exposed; a liquid crystal layer interposed between the upper and lower substrates, the liquid crystal layer having a first cell gap that corresponds to the lower transparent electrode and a second cell gap that corresponds to the reflective electrode, wherein the first cell gap is larger than the second cell gap; a color filter layer formed on the upper substrate, the color filter layer including a first portion that corresponds to the reflective electrode, a second portion that corresponds to the open hole, and a dummy pattern, wherein the second portion is thicker than
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: February 18, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Woong-Kwon Kim, Sang-Hee Yu
  • Publication number: 20020054256
    Abstract: A transflective liquid crystal display device includes: an upper substrate and a lower substrate opposing each other; a lower transparent electrode formed on the lower substrate; a passivation layer formed on the lower transparent electrode; a reflective electrode formed on the passivation layer, the reflective electrode having an open hole formed passing through the passivation layer such that a portion of the lower transparent electrode is exposed; a liquid crystal layer interposed between the upper and lower substrates, the liquid crystal layer having a first cell gap that corresponds to the lower transparent electrode and a second cell gap that corresponds to the reflective electrode, wherein the first cell gap is larger than the second cell gap; a color filter layer formed on the upper substrate, the color filter layer including a first portion that corresponds to the reflective electrode, a second portion that corresponds to the open hole, and a dummy pattern, wherein the second portion is thicker than
    Type: Application
    Filed: June 29, 2001
    Publication date: May 9, 2002
    Inventors: Woong-Kwon Kim, Sang-Hee Yu