Patents by Inventor Keuk Young Bang

Keuk Young Bang 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).

  • Method of detecting a defect area of a disk
    Patent number: 7092334
    Abstract: The present invention relates to a method of detecting a defect area without any mistake during data recording on a writable disk. This method detects a level of a servo error signal produced during a recording operation, checks whether the servo error signal is in an abnormal state based on the detected level, detects a periodic wobble signal or periodicity of the abnormal state occurrences of the servo error signal produced during the recording operation, and determines whether a recording area is in defect based on successful decoding of the detected periodic wobble signal or the periodicity of the abnormal state occurrences if the servo error signal is in an abnormal state. This method ensures exact detection of a defect area, whereby unnecessary speed reduction can be eliminated and successful data writing can be also guaranteed even in a defect area.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: August 15, 2006
    Assignee: Hitachi-LG Data Storage Korea, Inc.
    Inventors: Young Do Choi, Keuk Young Bang, Cheol Jin
  • Method of detecting a defect area of a disk
    Publication number: 20020163326
    Abstract: The present invention relates to a method of detecting a defect area without any mistake during data recording on a writable disk. This method detects a level of a servo error signal produced during a recording operation, checks whether the servo error signal is in an abnormal state based on the detected level, detects a periodic wobble signal or periodicity of the abnormal state occurrences of the servo error signal produced during the recording operation, and determines whether a recording area is in defect based on successful decoding of the detected periodic wobble signal or the periodicity of the abnormal state occurrences if the servo error signal is in an abnormal state. This method ensures exact detection of a defect area, whereby unnecessary speed reduction can be eliminated and successful data writing can be also guaranteed even in a defect area.
    Type: Application
    Filed: March 13, 2002
    Publication date: November 7, 2002
    Inventors: Young Do Choi, Keuk Young Bang, Cheol Jin
  • Apparatus and method for displaying guide program data from a cassette tape
    Patent number: 5956456
    Abstract: A method and apparatus for displaying program guide data for individual videotape cassettes without a videotape recorder. The apparatus and method includes a remote controller, which can function as a conventional controller, but also can interface without a memory in a tape cassette for displaying stored program data.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: September 21, 1999
    Assignee: LG Electronics Inc.
    Inventors: Keuk Young Bang, Se Yong Ro