Patents by Inventor Seung Hee Lee

Seung Hee 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: 6853434
    Abstract: A liquid crystal display device with plastic substrates is disclosed, which comprises: a subsidiary substrate, upper and lower plastic substrates including edge grooves and being fixed on the subsidiary substrate by heat resistant tapes and being joined with liquid crystals sealed there-between, and alignment layers formed on the surfaces which face one another of the upper and lower plastic substrates.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: February 8, 2005
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Hyang Yul Kim, Seung Hee Lee
  • Patent number: 6822700
    Abstract: Liquid crystal display devices having stairs type driving signal capable of preventing over-twist and improving response time properties by applying data signal of stairs type pulse signal when a gate signal is applied to drive the TFT, including upper and lower substrates with an interposed liquid crystal layer driving electrodes to drive the liquid crystals; first and second alignment layers rubbed in a first direction and in a direction parallel with the first alignment layer, respectively; first polarizing plate arranged outside of the lower substrate, forming 45° angle with the first direction; and second polarizing plate outside of the upper substrate having a transmittance axis perpendicular to the first polarizing plate and forming 45° angle with the first direction. A gate signal is applied to drive a thin film transistor in each pixel, and data signals having two or more stairs type pulse signals are successively applied.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: November 23, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Seung Ho Hong, Seung Hee Lee
  • Publication number: 20040227875
    Abstract: Disclosed is a reflective liquid crystal display.
    Type: Application
    Filed: December 24, 2003
    Publication date: November 18, 2004
    Inventors: In Cheol Park, Seung Hee Lee, Bong Gyu Rho
  • Patent number: 6809789
    Abstract: A liquid crystal display device capable of realizing high aperture ratio and high brightness by reducing or removing a conventional black matrix layer is provided. The device has a lower substrate and an upper substrate confronting each other. A counter electrode is formed on the lower substrate, and a pixel electrode is formed on the counter electrode with an insulating layer interposed. A lower polarizing plate and an upper polarizing plate are attached on respective outer sides of the lower and the upper substrates. The device further has a gate bus line and a data bus line. Particularly, a rubbing direction of the lower substrate corresponds with a direction of noise field formed between the data bus line and the pixel electrode or the counter electrode and between the gate bus line and the pixel electrode or the counter electrode.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: October 26, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Hyang Yul Kim, Seung Hee Lee
  • Patent number: 6801290
    Abstract: A liquid crystal display device with spacers integrally formed at a plastic substrate. The liquid crystal display device comprises: upper and lower substrates joined with liquid crystals interposed there-between, at least one substrate of which is made of plastic; a driving electrode for the liquid crystals formed at the lower substrate; polarizers attached at respective rear surfaces of the upper and lower substrates; and spacers interposed between the upper and lower substrates to maintain cell gaps, wherein the spacers are integrally formed at the substrate, and concurrently act as posts. Also, spacers can be integrally formed at either one of the lower plastic substrate and the upper plastic substrate, or the spacers can be integrally formed at both the lower plastic substrate and the upper plastic substrate, and the spacers have a height of “cell gap±a”, wherein the cell gap is 0.2 to 10 &mgr;m and “a” is not more than 1 &mgr;m.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: October 5, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Hyang Yul Kim, Jin Mahn Kim, Seung Hee Lee
  • Patent number: 6781657
    Abstract: A method of producing two domains within a liquid crystal layer by first forming two electrodes on a substrate, using a liquid crystal layer aligned vertically with respect to the substrate formed on the substrate where the substrate has two electrodes separated from each other with a selected distance. Finally, an electric field between the two electrodes is applied.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: August 24, 2004
    Assignee: Hyundai Electronics Industries Co., Ltd.
    Inventors: Hyang Yul Kim, Seung Hee Lee
  • Publication number: 20040110534
    Abstract: Capacity enhancement schemes are described for forward and reverse links of distributed cellular base stations consisting of a central unit and one or more remote units. In general, in one aspect, reverse link capacity is shared among remote units. The capacity sharing can be determined dynamically. The forward link capacity can also be enhanced by estimating the location of the mobile stations.
    Type: Application
    Filed: December 6, 2002
    Publication date: June 10, 2004
    Inventors: Sae-Young Chung, M. Vedat Eyuboglu, Yong Hoon Kang, Dae-Young Kim, Jin Hwa Ku, Seung Hee Lee, Michael D. Pollman
  • Patent number: 6747712
    Abstract: The present invention comprises an upper substrate; a data bus line and a storage capacitance bus line on a lower substrate; a gate bus line at the position of bisecting the unit pixel; a thin film transistor on the gate bus line; a counter electrode; and a pixel electrode. The pixel electrode comprises a frame shaped body unit formed on the edge in counter electrode and a plurality of slant slits arranged with a regular distance to divide the body unit into several parts, forming a predetermined angle with the gate bus line. The angle of slant slits in the pixel electrode is symmetric with respect to the gate bus line. The storage capacitance bus line is partially overlapped with both the upper edge of pixel electrode in one unit pixel and the lower edge of pixel electrode in the closest unit pixel. According to the present invention, the black matrix area is reduced by eliminating or minimizing the light leakage through modifying the pixel structure, thereby improving the aperture ration and transmittance.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: June 8, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Jeong Dong Noh, Seung Hee Lee
  • Patent number: 6741311
    Abstract: A reflective type FFS-LCD includes: a liquid crystal layer; a first substrate formed with counter and pixel electrodes on one side of the liquid crystal layer to generate a fringer field to drive the liquid crystal molecules; a second substrate on the other side of the liquid crystal layer; a first homogeneous alignment layer near the first substrate having a rubbing axis in a selected direction; a second homogeneous alignment layer near the second substrate and having a rubbing axis in a selected direction; a polarizer having a selected polarizing axis; and a reflective plate. Retardation occurs in the liquid crystal layer by (2n+1)&lgr;/4 when the liquid crystal molecules in the liquid crystal layer are driven by the fringe field.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: May 25, 2004
    Assignee: Boe-Hydis Technology., Ltd.
    Inventors: Seung Ho Hong, Seung Hee Lee
  • Patent number: 6721028
    Abstract: The present invention provides a Fringe Field Switching-Liquid Crystal Display comprising: an upper substrate and a lower substrate; a gate line and a data line for defining a unit pixel, a plurality of protrusion parts being respectively formed on an edge region of the gate line adjacent to a pixel electrode, each of protrusion parts of the gate line being positioned in a depression part formed between the protrusion parts of the pixel electrode; a counter electrode formed in the unit pixel; a common line for applying a common signal to the counter electrode; a pixel electrode forming an electric field with the counter electrode, a plurality of protrusion parts being formed on an edge region of the pixel electrode adjacent to the gate line, each of protrusion parts being positioned in a depression part formed between the protrusion parts of the gate line; and a liquid crystal filled between the upper substrate and the lower substrate.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: April 13, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Hyang Yul Kim, Seung Hee Lee
  • Patent number: 6713784
    Abstract: Disclosed is an in-plane switching(IPS) mode liquid crystal display(LCD) to prevent generating parasitic electric field due to residual DC components and static electricity. The IPS mode LCD according to the present invention comprises a first substrate; counter electrodes formed on the first substrate; pixel electrodes formed on the first substrate and spaced apart from the counter electrodes; a first high dielectric layer formed between the counter and pixel electrodes on the first substrate in which the counter and pixel electrodes are formed; a second substrate opposed to the first substrate; and a second high dielectric layer disposed at an inner surface of the second substrate.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: March 30, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Hyang Yul Kim, In Cheol Park, Seung Hee Lee
  • Patent number: 6707522
    Abstract: Disclosed is a LCD comprising a substrate; a signal applying unit having a gate line and a common line on the substrate; and a display unit forming a plurality of pixels with a data line, a counter electrode, a pixel electrode, a TFT and the gate line and the common line extended from the signal applying unit, wherein the pixel electrode comprises a body unit and a branch unit, the body unit being parallel to the gate line and the branch unit comprising a plurality of branches being parallel to the data line, and pixel electrode of the outmost pixel that is the most adjacent to the signal applying unit has some of branches formed on the signal applying unit.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: March 16, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Sung Woon Kim, Jin Mahn Kim, Seung Hee Lee
  • Patent number: 6678027
    Abstract: Disclosed is a fringe field switching mode LCD comprising an upper and a lower substrates opposed to each other with a predetermined distance; a liquid crystal layer interposed between the substrates, comprising liquid crystal molecules of positive dielectric anisotropy; a transparent counter electrode formed on the inner surface of lower substrate; a transparent pixel electrode formed on the inner surface of the lower substrate, forming a fringe field with the counter electrode to drive most of liquid crystals; and a horizontal alignment layer interposed between the substrates and liquid crystal layer, having a predetermined rubbing axis, wherein a retardation of the liquid crystal layer is 0.3 to 0.45 &mgr;m.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: January 13, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Chi Hyuck Park, Jin Mahn Kim, Seung Hee Lee, Seung Ho Hong
  • Patent number: 6657693
    Abstract: Liquid crystal display having fast response time and preventing color shift is disclosed.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: December 2, 2003
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Youn Hak Jeong, Hyang Yul Kim, Seung Hee Lee
  • Patent number: 6646706
    Abstract: Disclosed is a fringe field switching mode liquid crystal display.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: November 11, 2003
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Kyu Hwan Lim, Hyang Yul Kim, Seung Hee Lee
  • Patent number: 6646707
    Abstract: Disclosed is a fringe field switching mode LCD. The disclosed comprises a first and a second transparent insulating substrates arranged opposite to each other with a predetermined distance, with a liquid crystal layer including a plurality of liquid crystal molecules interposed between them; a plurality of gate bus lines and data bus lines formed on the first transparent insulating substrate and arranged in a matrix form to define a unit pixel; a thin film transistor formed at the intersection of the gate bus line and the data bus line; a counter electrode disposed in each unit pixel, made of transparent conductor; and a pixel electrode arranged in each unit pixel to generate a fringe field with the counter electrode, being insulated with the counter electrode and made of transparent conductor and including a plurality of upper slits and lower slits symmetrical each other with respect to long side of the pixel with a predetermined tilted angle.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: November 11, 2003
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Jeong Dong Noh, Seung Hee Lee, Seok Lyul Lee
  • Patent number: 6642985
    Abstract: The present invention discloses a fringe field switching mode liquid crystal display. The disclosed comprises: a lower and an upper substrates disposed opposite to each other at a predetermined distance, having transparency; a counter electrode and a pixel electrode disposed on the inner surface of the lower substrate with a gate insulating layer interposed and made of transparent conductors, forming a fringe field when a electric field is applied; a black matrix and color filter formed on the inner surface of the upper substrate; an ITO layer disposed on the inner surface of the upper substrate which has the black matrix and the color filter therein; and a liquid crystal layer interposed between the lower and the upper substrates, including a plurality of liquid crystal molecules of negative dielectric anisotropy. In the FFS mode LCD of the present invention, the counter electrode has a plate shape and the pixel electrode has a slit shape.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: November 4, 2003
    Assignee: Hyundai Display Technology Inc.
    Inventors: Hyang Yul Kim, Seung Hee Lee, Seung Ho Hong
  • Publication number: 20030151715
    Abstract: A liquid crystal display device with spacers integrally formed at a plastic substrate. The liquid crystal display device comprises: upper and lower substrates joined with liquid crystals interposed there-between, at least one substrate of which is made of plastic; a driving electrode for the liquid crystals formed at the lower substrate; polarizers attached at respective rear surfaces of the upper and lower substrates; and spacers interposed between the upper and lower substrates to maintain cell gaps, wherein the spacers are integrally formed at the substrate, and concurrently act as posts. Also, spacers can be integrally formed at either one of the lower plastic substrate and the upper plastic substrate, or the spacers can be integrally formed at both the lower plastic substrate and the upper plastic substrate, and the spacers have a height of “cell gap±a”, wherein the cell gap is 0.2 to 10 &mgr;m and “a” is not more than 1&mgr;m.
    Type: Application
    Filed: December 30, 2002
    Publication date: August 14, 2003
    Inventors: Hyang Yul Kim, Jin Mahn Kim, Seung Hee Lee
  • Patent number: 6603526
    Abstract: The present invention is directed to provide a liquid crystal display having an improved picture quality, high transmittance and high aperture ratio.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: August 5, 2003
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Hyang Yul Kim, Seung Hee Lee
  • Patent number: 6600542
    Abstract: The present invention is directed to provide a liquid crystal display having an improved picture quality, high transmittance and high aperture ratio.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: July 29, 2003
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Hyang Yul Kim, Seung Hee Lee