Patents by Inventor Kyungki Kim

Kyungki 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).

  • Switchable Fresnel lens and fabrication method thereof
    Patent number: 9239504
    Abstract: A switchable Fresnel lens and a fabrication method thereof are disclosed. The switchable Fresnel lens comprises: an upper plate having a first electrode; a lower plate having a second electrode; and a lens cell comprising a liquid crystal layer sealed between the upper plate and the lower plate. The lens cell comprises a Fresnel lens formed by an electric field applied through the first and second electrodes, and having a discontinuous boundary. The lens cell comprises barrier ribs that are vertically formed between the upper plate and the lower plate at the discontinuous boundary of the Fresnel lens.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: January 19, 2016
    Assignees: LG DISPLAY CO., LTD., CHONBUK NATIONAL UNIVERSITY
    Inventors: Seunghee Lee, Jounho Lee, Kyungki Kim, Sanghoon Oh
  • SWITHCABLE FRESNEL LENS AND FABRICATION METHOD THEREOF
    Publication number: 20140253832
    Abstract: A switchable Fresnel lens and a fabrication method thereof are disclosed. The switchable Fresnel lens comprises: an upper plate having a first electrode; a lower plate having a second electrode; and a lens cell comprising a liquid crystal layer sealed between the upper plate and the lower plate. The lens cell comprises a Fresnel lens formed by an electric field applied through the first and second electrodes, and having a discontinuous boundary. The lens cell comprises barrier ribs that are vertically formed between the upper plate and the lower plate at the discontinuous boundary of the Fresnel lens.
    Type: Application
    Filed: June 14, 2013
    Publication date: September 11, 2014
    Inventors: Seunghee Lee, Jounho Lee, Kyungki Kim, Sanghoon Oh