Patents by Inventor Ki Yong Balk

Ki Yong Balk 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).

  • Back light unit
    Patent number: 7736042
    Abstract: Provided is a back light unit. The back light unit includes a light guide plate having a light guide pattern part; at least one light emitting unit provided at a sidewall of the light guide plate, and irradiating light to the light guide plate; a keypad positioned over the light guide plate, and comprising a resin layer, a base resin layer, a character opening part having a character shape, a key assembly provided at one side, and a key adherence film provided on an upper surface of the base resin layer; and a printed circuit board comprising a metal dome switch positioned under a lower surface of the light guide plate.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: June 15, 2010
    Assignee: LS Tech Co., Ltd.
    Inventors: Deuk II Park, Choong Yop Rhew, Ki Yong Balk, Young Jin Hyun, Jun Kyu Lee, Hyun Jung Cho, Kyu Jin Choi
  • Back light unit
    Publication number: 20080019115
    Abstract: Provided is a back light unit. The back light unit includes a light guide plate having a light guide pattern part; at least one light emitting unit provided at a sidewall of the light guide plate, and irradiating light to the light guide plate; a keypad positioned over the light guide plate, and comprising a resin layer, a base resin layer, a character opening part having a character shape, a key assembly provided at one side, and a key adherence film provided on an upper surface of the base resin layer; and a printed circuit board comprising a metal dome switch positioned under a lower surface of the light guide plate.
    Type: Application
    Filed: February 20, 2007
    Publication date: January 24, 2008
    Inventors: Deuk II Park, Choong Yop Rhew, Ki Yong Balk, Young Jin Hyun, Jun Kyu Lee, Hyun Jung Cho, Kyu Jin Choi