Patents by Inventor HUN-JOO KIM

HUN-JOO KIM 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).

  • Publication number: 20090207123
    Abstract: A backlight driving apparatus and a driving method thereof, in which the backlight driving apparatus includes a driving unit and a controller. The driving unit boosts an input voltage in response to a duty ratio of a control signal and provides the boosted input voltage to an LED array. The controller increases the duty ratio of the control signal in a step-by-step fashion by comparing a preset target value with a sequentially increasing step-setting value if a driving start signal is enabled.
    Type: Application
    Filed: November 25, 2008
    Publication date: August 20, 2009
    Inventors: HUN-JOO KIM, Jin-Woo Park, Young-Suk Ha
  • Publication number: 20080068320
    Abstract: A liquid crystal display achieving brightness uniformity, thereby reducing manufacturing costs, includes a liquid crystal panel having a first region and a second region that exhibit different brightnesses when a predetermined data voltage is applied, a memory storing a reference brightness that is to be exhibited by the liquid crystal panel when the predetermined data voltage is applied, and a brightness correction unit receiving image data corresponding to the predetermined data voltage and correcting the image data so that the first region and the second region exhibit the reference brightness.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 20, 2008
    Inventors: Hun-joo Kim, Han-jin Ryu, Seong-sik Choi, Young-mi Kim