Patents by Inventor Keuk-sang Kwon

Keuk-sang Kwon 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: 6566902
    Abstract: A liquid crystal display device structure is provided for testing display signal lines. The display structure improves sensitivity in detecting shorts or opens in data signal lines. In the display, a first detecting line commonly connects odd-numbered data signal lines of a liquid crystal display panel, and a second detecting line commonly connects even-numbered data signal lines of the liquid crystal display panel. First and second electrostatic discharge (ESD) preventing circuits are respectively connected to the odd and even-numbered data signal lines. A first electrode line commonly connects the first ESD preventing circuits and a second electrode line commonly connects the second ESD preventing circuits. Resistances are connected in series between the common electrode lines to increase a detectable critical resistance between the two detecting lines, to thereby improve sensitivity in signal line fault detection.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: May 20, 2003
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Keuk Sang Kwon, Yong Ik Bang
  • Publication number: 20020163488
    Abstract: A liquid crystal display device includes a plurality of data lines on a liquid crystal display panel, a plurality of gate lines on the liquid crystal display panel orthogonal to the plurality of data lines, a plurality of thin film transistors on the liquid crystal display panel, each arranged at intersections between the data lines and the gate lines, a plurality of pixels, each arranged at the intersections between the data lines and the gate lines, a gate driver for applying a scanning pulse to the gate lines, a data driver for applying data to the data lines, a timing controller for applying a timing signal to the gate driver and the data driver, a host controller for applying the data to the data driver and applying a horizontal synchronizing signal having a first frequency and a vertical synchronizing signal having a second frequency less than 60Hz to the timing controller to control the data driver and the timing controller, a plurality of auxiliary lines, each provided on the liquid crystal display pa
    Type: Application
    Filed: March 14, 2002
    Publication date: November 7, 2002
    Applicant: LG.Philips LCD Co., Ltd.
    Inventors: Hong Sung Song, Keuk Sang Kwon
  • Publication number: 20020097364
    Abstract: An array substrate for a liquid crystal display device includes a substrate; a gate line arranged in a transverse direction on the substrate; a data line arranged perpendicular to the gate line and forming a pixel region with the gate line; and a thin film transistor positioned near an intersection of the gate and data lines. The thin film transistor includes a gate electrode, an active layer, a source electrode, and a drain electrode. The gate electrode has a slanted corner slanted from the gate electrode to the gate line. The source electrode has a U shape and is positioned over the gate electrode. The drain electrode has a drain protrusion which is positioned over the gate electrode and the slanted corner of the gate electrode and located inside the U-shaped source electrode. The drain protrusion is spaced apart from the U-shaped source electrode to form a channel region therebetween. An imaginary axis of the U-shaped source electrode and drain protrusion forms an angle with the gate line.
    Type: Application
    Filed: November 30, 2001
    Publication date: July 25, 2002
    Inventors: Keuk-Sang kwon, In-Duk Song
  • Publication number: 20020093616
    Abstract: A liquid crystal display device includes a liquid crystal panel including an upper substrate, and a lower substrate having a plurality of source pads and gate pads, the upper and lower substrates being attached using a sealant; a source PCB connected with the plurality of source pads such that the source PCB applies signals to the source pads; and a plurality of gate transmitting lines connecting the gate pads with the source pads such that gate signals including Vcom, Vgh, Vgl, Vcc, Gsp, Gsc, Goe, and Gnd are transmitted from the source PCB to the gate PCB via the gate transmitting lines, wherein one of the gate transmitting line has a resistance of below 30 &OHgr; such that the line is used for transmitting a gate low voltage “Vgl”.
    Type: Application
    Filed: May 30, 2001
    Publication date: July 18, 2002
    Inventors: Sung-Il Park, Keuk-Sang Kwon, Kyong-Rak Lee
  • Publication number: 20020076861
    Abstract: An array substrate for use in an X-ray sensing device is fabricated using an etching stopper that enables good control of the etching process and that prevents over-etch of drain electrodes and second capacitor electrodes while forming contact holes and a cutting furrow. The etching stopper is located in a tiling portion that is utilized for tiling substrates to form a large-sized X-ray detector. During fabrication, gate lines can have gate-protruded portions located near the etching stopper, and the etching stopper can have stopper-protruded portions near the gate lines. The stopper-protruded portions electrically connect to the gate-protruded portions through gate line contact holes such that the etching stopper and the gate lines have equipotentials. This can reduce static electricity damage.
    Type: Application
    Filed: December 29, 2000
    Publication date: June 20, 2002
    Inventor: Keuk-Sang Kwon
  • Publication number: 20020075419
    Abstract: A liquid crystal display device structure is provided for testing display signal lines. The display structure improves sensitivity in detecting shorts or opens in data signal lines. In the display, a first detecting line commonly connects odd-numbered data signal lines of a liquid crystal display panel, and a second detecting line commonly connects even-numbered data signal lines of the liquid crystal display panel. First and second electrostatic discharge (ESD) preventing circuits are respectively connected to the odd and even-numbered data signal lines. A first electrode line commonly connects the first ESD preventing circuits and a second electrode line commonly connects the second ESD preventing circuits. Resistances are connected in series between the common electrode lines to increase a detectable critical resistance between the two detecting lines, to thereby improve sensitivity in signal line fault detection.
    Type: Application
    Filed: June 29, 2001
    Publication date: June 20, 2002
    Applicant: LG.PHILIPS LCD CO., LTD.
    Inventors: Keuk Sang Kwon, Yong Ik Bang
  • Publication number: 20010026345
    Abstract: The present invention discloses a liquid crystal display device, including upper and lower substrates with a liquid crystal layer interposed therebetween; a sealant between the upper and lower substrates; a plurality of source and gate pads on the lower substrate; a plurality of gate and data lines on the lower substrate, each gate line being electrically connected with the corresponding gate pad, each data line being electrically connected with the corresponding source pad; a gate insulating layer between the gate lines and the data lines; a source PCB electrically connected with the plurality of source pads; a gate PCB electrically connected with the plurality of gate pads; and a plurality of transmitting wires on the lower substrate, the transmitting wires being electrically connected with the gate and source pads across the sealant such that the source PCB is electrically connected with the gate PCB.
    Type: Application
    Filed: December 29, 2000
    Publication date: October 4, 2001
    Inventors: Sung-Il Park, Won-Gyun Youn, In-Duk Song, Keuk-Sang Kwon, Youn-Ik Bang
  • Publication number: 20010017607
    Abstract: The present invention discloses a quad type liquid crystal display device, comprising: a liquid crystal panel having gate and data lines which define sub-pixel regions; gate driving integrated circuits for driving the gate lines; and a plurality of data drive integrated circuits arranged on one side of the liquid crystal panel, each of the data drive integrated circuit having “m” (m is natural number) number of channels, wherein (3n−1)th (n is natural number) channels for each data drive integrated circuit are floating.
    Type: Application
    Filed: December 29, 2000
    Publication date: August 30, 2001
    Inventors: Keuk-Sang Kwon, Joon-Ha Park