Patents by Inventor Heum-II Baek

Heum-II Baek 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: 6961104
    Abstract: A transflective liquid crystal display device includes: first and second substrates facing and spaced apart from each other, the first and second substrates having reflective and transmissive portions; a first retardation film on an outer surface of the first substrate, the first retardation film having a first optical axis; a first polarizing plate on the first retardation film, the first polarizing plate having a first transmissive axis; a common electrode on an inner surface of the first substrate; a pixel electrode on an inner surface of the second substrate; a second retardation film on an outer surface of the second substrate, the second retardation film having a second optical axis; a second polarizing plate on the second retardation film, the second polarizing plate having a second transmissive axis; and a liquid crystal layer between the common electrode and the pixel electrode, the liquid crystal layer having a director, wherein the first optical axis has a first angle of ? with respect to the first
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: November 1, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventor: Heum-II Baek
  • Publication number: 20050151711
    Abstract: A display device includes an image attribute signal generating portion analyzing R, G, and B input data signals with first brightness levels and generating attribute signals; a signal treating portion converting the R, G, and B input data signals to R, G, and B output data signals using the plurality of attribute signals, wherein R, G, and B input data signals used to display images having colors other than white are converted to R, G, and B output data signals, wherein the R. G, and B output data signals have second brightness levels, wherein the second brightness levels are lower than the first brightness levels; and a display portion having a plurality of pixels, wherein each pixel includes R, G, and B sub-pixels, and wherein the R, G, and B output data signals are supplied to respective ones of the R, G, and B sub-pixels.
    Type: Application
    Filed: June 28, 2004
    Publication date: July 14, 2005
    Inventor: Heum-II Baek
  • Publication number: 20050094048
    Abstract: A fabricating method of an array substrate for a transflective liquid crystal display device includes: sequentially depositing a first metal layer and an impurity-doped amorphous silicon layer on a substrate and etching the first metal layer and the impurity-doped amorphous silicon layer through a first mask process to form source and drain electrodes, a data line and an ohmic contact layer. An amorphous silicon layer, a first insulating layer and a second metal layer are sequentially deposited on the source and drain electrodes, the data line and the ohmic contact layer and etching the amorphous silicon layer, the first insulating layer and the second metal layer through a second mask process to form a gate electrode, a gate line and an active layer, the gate line defining a pixel region with the data line. A second insulating layer is formed on the gate electrode and the gate line.
    Type: Application
    Filed: December 6, 2004
    Publication date: May 5, 2005
    Inventor: Heum-Ii Baek
  • Patent number: 6611306
    Abstract: A transflective LCD device improves a light transmittance in both the transmissive mode and the reflective mode and improves efficiency in the use of the light regardless of wavelength. To properly control the ON/OFF-switch of the blue wavelength band or the red wavelength band, the transflective LCD device adopts a half wave plate (&lgr;/2) and changes the optic axes of the polarizers and the retardation film.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: August 26, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventor: Heum-II Baek
  • Patent number: 6509943
    Abstract: The present invention provides an array substrate for use in reflective LCD device that has a plurality of concave holes. Each concave hole acts as a drain contact hole and as means of increasing the reflective area of a reflective electrode.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: January 21, 2003
    Assignee: LG. Philips LCD Co., Ltd.
    Inventors: Heum-II Baek, Yong-Beom Kim
  • Publication number: 20020093609
    Abstract: A liquid crystal display device includes first and second substrates facing and spaced apart from each other, a liquid crystal layer interposed between the first and second substrates, a transparent common electrode disposed on the first substrate, a gate line disposed on the second substrate along a first direction, a data line disposed on the second substrate along a second direction perpendicular to the first direction, a thin film transistor disposed at an intersection of the gate line and the data line, a gate insulation layer disposed on the second substrate, a passivation layer disposed on the gate insulation layer, and a reflective electrode disposed on the passivation layer, wherein the reflective electrode overlaps end portions of the data line.
    Type: Application
    Filed: August 21, 2001
    Publication date: July 18, 2002
    Inventors: Heum-II Baek, Yong-Beom Kim, Kyoung-Su Ha, Dong-Guk Kim