Patents by Inventor Yun Bok Lee

Yun Bok Lee 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: 7339645
    Abstract: A method of fabricating an in-plane switching mode liquid crystal display device includes: forming array elements on a first substrate, the array elements including field-generating electrodes having a curved shape; rubbing one of the first substrate and a second substrate in one direction, which can be any direction; and forming a liquid crystal layer between the first substrate and a second substrate such that at least a portion of the liquid crystal is oriented in the one direction.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: March 4, 2008
    Assignee: LG.Philips LCD. Co., Ltd.
    Inventor: Yun-Bok Lee
  • Patent number: 7312841
    Abstract: A liquid crystal display device includes first and second substrates, first and second polarizers on outer surfaces of the first and second substrates, a gate line and a data line on the first substrate, the gate line and the data line crossing each other to define a pixel area, a thin film transistor electrically connected to the gate and data lines, a pixel electrode connected to the thin film transistor, a color filter layer on the second substrate, the color filter layer having a first concave portion, a common electrode on the color filter layer, and a liquid crystal layer between the first and second substrates, the liquid crystal layer having a negative dielectric anisotropy with chiral dopants.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: December 25, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Yun-Bok Lee, Yong-Sung Ham
  • Patent number: 7307684
    Abstract: A liquid crystal display (LCD) device is disclosed, in which a hole or groove is formed at the same direction as the axis of polarization of first and second polarizers for improving the luminance, and an electric field inducing window or a dielectric protrusion is formed corresponding to the center of the hole or groove to stabilize the texture of liquid crystal layer.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: December 11, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Yong Sung Ham, Yun Bok Lee
  • Patent number: 7304709
    Abstract: A fringe field switching mode liquid crystal display device includes opposing first and second substrates having a liquid crystal layer disposed therebetween. A gate line and a data line crossing the gate line define a pixel region on the first substrate. A thin film transistor is connected to the gate line and the data line, a common line is parallel to and spaced apart from the gate line, and a common electrode extends from the common line. A pixel electrode is connected to the thin film transistor and overlaps the common electrode. One of the pixel and common electrodes is substantially square and the other has a circular or spiral shape.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: December 4, 2007
    Assignee: LG. Philips Lcd Co., Ltd.
    Inventor: Yun-Bok Lee
  • Patent number: 7295255
    Abstract: A thin film transistor array substrate having spacers formed without sacrificing an aperture ratio and a method for fabricating the same. The thin film transistor array substrate according to the present invention includes a gate line on a substrate; a gate insulating film on the gate line; a data line on the gate insulating film, the data line crossing the gate line to define a pixel region and the gate insulating film between the gate line and the data line, wherein at least one of the gate line and the data line includes a protrusion; a thin film transistor at a crossing the gate line and the data line; a pixel electrode at the pixel region, the pixel electrode connected to the thin film transistor; and a spacer within the protrusion dispensed by an ink-jet system.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: November 13, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae Hong Jun, Yun Bok Lee
  • Patent number: 7262825
    Abstract: A process for forming an in-plane switching liquid crystal display device includes: defining a first liquid crystal cell area that has a first size and a second liquid crystal cell area that has a second size on a first bare glass, wherein first longer sides of the first liquid crystal cell area run in a first direction on the first bare glass and second longer sides of the second liquid crystal cell areas run in a second direction; forming array elements that include thin film transistors, common electrodes and pixel electrodes within the first and second liquid crystal cell areas of the first bare glass, wherein the common electrodes and pixel electrodes define concentric ring-shaped apertures; rubbing the first bare glass having the array elements in a first rubbing direction; forming a color filter layer on a second bare glass wherein liquid crystal cell areas corresponding in size to the first and second liquid crystal cell areas are defined; and rubbing the second bare glass having the color filter in a
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: August 28, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Yun-Bok Lee
  • Patent number: 7253855
    Abstract: A liquid crystal display device includes a first substrate, a second substrate made of plastic and being spaced apart from the first substrate, a thin film transistor on the inner surface of the first substrate, a pixel electrode connected to the thin film transistor, a color filter layer under the pixel electrode, a polarizer on the outer surface of the second substrate, a black matrix on the inner surface of the second substrate and corresponding to the thin film transistor, a common electrode on the black matrix, and a liquid crystal layer between the pixel electrode and the common electrode.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: August 7, 2007
    Assignee: LG Philips LCD Co., Ltd.
    Inventors: Yun-Bok Lee, Jong-Hoon Yi
  • Publication number: 20070165171
    Abstract: A liquid crystal display device includes first and second gate lines in an active region, and first and second data lines crossing the first and second gate lines, respectively, wherein the first and second gate lines, and the first and second data lines define first and second pixel regions, first and second thin film transistors in the first and second pixel regions, wherein the first thin film transistors connected with the first data line and the second gate line, and the second thin film transistor connected with the second data line and the first gate line, first and second pixel electrodes connected with the first and second thin film transistors, first and second common electrodes defining first and second substantially circular band shaped regions with the first and second pixel electrodes, and a first common line connected with the first and second common electrodes.
    Type: Application
    Filed: December 21, 2004
    Publication date: July 19, 2007
    Inventor: Yun-Bok Lee
  • Patent number: 7244627
    Abstract: A method for fabricating a liquid crystal display (LCD) device to improve picture quality by preventing defective rubbing, is disclosed. The method which includes preparing first and second substrates, forming a thin film transistor on the first substrate, forming a first orientation layer on the first substrate including the thin film transistor, performing rubbing and orientation direction alignment processes on the first orientation layer to provide a uniform alignment direction, and forming a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: July 17, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Yun Bok Lee, Yong Sung Ham, Su Hyun Park, Seung Hee Nam
  • Publication number: 20070146607
    Abstract: An array substrate for use in an in-plane switching liquid crystal display device includes a gate line on a substrate; a data line crossing the gate line to define a pixel region having an aperture area; a thin film transistor disposed at one corner of the pixel region and connected to the gate line and the data line, the thin film transistor including a semiconductor layer; a common line spaced apart from and substantially parallel to the gate line; a common electrode extending from the common line and including a plurality of common electrode patterns, wherein an outermost portion of the common electrode pattern is substantially rectangle shaped within the pixel region and has a substantially circular opening in the middle thereof; a capacitor electrode overlapping the rectangle shaped common electrode pattern, the capacitor electrode connected to the thin film transistor; a pixel connecting line substantially parallel to the data line in the pixel region and connected to the capacitor electrode; and a pixe
    Type: Application
    Filed: February 28, 2007
    Publication date: June 28, 2007
    Inventors: Yun-Bok Lee, Won-Ho Lee
  • Patent number: 7227607
    Abstract: An array substrate for an in-plane switching liquid crystal display device includes: a gate line on a substrate; a data line crossing the gate line to define a pixel region; a thin film transistor connected to the gate line and the data line; a common line parallel to and spaced apart from the gate line; a common electrode extending from the common line and including a plurality of common electrode patterns; a pixel connecting line connected to a capacitor electrode; and a pixel electrode extending from the pixel connecting line and including a plurality of pixel electrode patterns, wherein one of the plurality of common electrode patterns and one of the plurality of pixel electrode patterns form concentric rings of pixel and common electrode patterns that are within an open region of another one of the plurality of common electrode patterns.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: June 5, 2007
    Assignee: LG.Philips LCD Co., Ltd
    Inventor: Yun-Bok Lee
  • Patent number: 7227609
    Abstract: This disclosure provides an array substrate for use in an IPS-LCD device which includes substantially zigzag-shaped pixel and common electrodes. The pixel electrodes and the common electrodes are connected with a connecting line and the common line, respectively. However, if each pixel and common electrode forms an acute angle with each connecting and common lines, liquid crystal molecules are strangely rotated and produce extraordinary domains in the intersection when the voltage is turned ON. Moreover, disclination occurs around the intersection. In order to overcome these problems, substantially sawtooth-shaped bases are employed of where the pixel and common electrodes meet the connecting and common lines, respectively. So each electrode forms an obtuse angle with each respective line, and thus the rotational direction of the liquid crystal molecules are the same in regions of the pixel area when the voltage is supplied.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: June 5, 2007
    Assignee: LG.Philips LCD Co., Ltd
    Inventor: Yun-Bok Lee
  • Patent number: 7223990
    Abstract: Disclosed is an ion beam irradiation device including a holder supporting a substrate; and an ion beam source that is a predetermined distance from the substrate and inclined to be substantially parallel with the substrate and that irradiates the substrate with an ion beam.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: May 29, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Yun Bok Lee, Yong Sung Ham
  • Patent number: 7224422
    Abstract: A multi-domain LCD device and a method for manufacturing the same are provided, in which it is possible to prevent an opening from being asymmetrical due to the bonding of margins of two substrates, thereby stabilizing peak transmittance characteristics and obtaining a wide viewing angle. The multi-domain LCD device includes first and second substrate being opposite to each other, a color filter layer having an opening on the first substrate, an insulating layer on the entire surface of the first substrate including the color filter layer, a first alignment layer on the insulating layer, a protrusion on the second substrate and corresponding to the opening of the first substrate, a second alignment layer on the entire surface of the second substrate including the protrusion, and a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: May 29, 2007
    Assignee: LG.Phillips LCD Co., Ltd.
    Inventors: Yun Bok Lee, Yong Sung Ham
  • Patent number: 7202928
    Abstract: An array substrate for use in an in-plane switching liquid crystal display device includes a gate line on a substrate; a data line crossing the gate line to define a pixel region having an aperture area; a thin film transistor disposed at one corner of the pixel region and connected to the gate line and the data line, the thin film transistor including a semiconductor layer; a common line spaced apart from and substantially parallel to the gate line; a common electrode extending from the common line and including a plurality of common electrode patterns, wherein an outermost portion of the common electrode pattern is substantially rectangle shaped within the pixel region and has a substantially circular opening in the middle thereof; a capacitor electrode overlapping the rectangle shaped common electrode pattern, the capacitor electrode connected to the thin film transistor; a pixel connecting line substantially parallel to the data line in the pixel region and connected to the capacitor electrode; and a pixe
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: April 10, 2007
    Assignee: LG. Philips LCD Co., Ltd
    Inventors: Yun-Bok Lee, Won-Ho Lee
  • Patent number: 7180568
    Abstract: A method for fabricating a liquid crystal display device includes: forming alignment keys by at least one of ink jet printing, offset printing, screen printing and laser marking on a dummy region of an upper substrate; forming a first alignment film over an active region of the upper substrate; forming sealant along a periphery of the active region of the upper substrate; and bonding the upper substrate to a lower substrate.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: February 20, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Yun Bok Lee, Woo Hyun Kim
  • Patent number: 7177001
    Abstract: An in-plane switching mode liquid crystal display device includes: first and second substrates facing and spaced apart from each other; a gate line on the first substrate; a data line crossing the gate line to define a pixel region including a plurality of domains; a thin film transistor connected to the gate line and the data line; a common line parallel to and spaced apart from the gate line; a common electrode extending from the common line and having a ring shape; a pixel electrode connected to the thin film transistor and having a ring shape, the pixel electrode alternating with the common electrode; and a liquid crystal layer between the pixel electrode and the second substrate, the liquid crystal layer in neighboring domains having orientation directions different from each other.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: February 13, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Yun-Bok Lee
  • Patent number: 7173680
    Abstract: A multi-domain liquid crystal display device includes first and second substrates facing each other and a liquid crystal layer between the first and second substrates. A plurality of gate bus lines are arranged in a first direction on the first substrate and a plurality of data bus lines are arranged in a second direction on the first substrate to define a pixel region. A pixel electrode is electrically charged through the data bus line in the pixel region. A common-auxiliary electrode surrounds the pixel electrode on a same layer whereon the gate bus line is formed.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: February 6, 2007
    Assignee: L.G.Philips LCD Co., Ltd
    Inventors: Seong Moh Seo, Hyun Ho Shin, Kyeong Jin Kim, Yun Bok Lee, Jeom Jae Kim
  • Patent number: 7173682
    Abstract: The present invention relates to an in-plane switching mode LCD and a method of manufacturing the same, in which data electrodes and common electrodes in a unit pixel have the same light transmitting area to reduce the luminance difference according to positive or negative polarity of an applied DC voltage. The in-plane switching mode LCD comprises first and second substrates; a plurality of pixel areas defined on the first substrate; data electrodes and common electrodes alternately formed in each of the pixel areas and patterned to have the same light transmitting area according to the applied voltage; and a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: February 6, 2007
    Assignee: L.G.Philips LCD Co., Ltd
    Inventors: Gi Hong Kim, Yun Bok Lee
  • Patent number: 7170576
    Abstract: A thin film transistor array substrate having spacers formed without sacrificing an aperture ratio and a method for fabricating the same. The thin film transistor array substrate according to the present invention includes a gate line on a substrate; a gate insulating film on the gate line; a data line on the gate insulating film, the data line crossing the gate line to define a pixel region and the gate insulating film between the gate line and the data line, wherein at least one of the gate line and the data line includes a protrusion; a thin film transistor at a crossing the gate line and the data line; a pixel electrode at the pixel region, the pixel electrode connected to the thin film transistor; and a spacer within the protrusion dispensed by an ink-jet system.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: January 30, 2007
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Jae Hong Jun, Yun Bok Lee