Patents by Inventor Gyun-gyoo Lee

Gyun-gyoo Lee 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).

  • Field emission cathode
    Patent number: 5506476
    Abstract: A field emission cathode includes first and second cathode layers having respective projections and disposed on the surface of a substrate. An insulating layer having an opening and disposed on the surface of the cathode layer surrounds the projections. A field emission tip includes the projections, one of which is annular and projects beyond the other so that the field emission tip has a crater-like shape which improves the electron emission characteristic of the cathode.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: April 9, 1996
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Gyun-gyoo Lee, Sun-jeong Choi