Patents by Inventor Dong-Gil Jang

Dong-Gil Jang 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).

  • Directly heated cathode structure
    Patent number: 5831379
    Abstract: A directly heated cathode structure includes at least one porous pellet containing electron emission material and filaments secured to at least three side surfaces of the porous pellet to support the pellet stably and prevent vibration caused by shock and potential deformation. Each filament is supported by an insulating block and more than one pellet may be mounted on a single insulating block. As a result, a highly reliable cathode ray tube can be manufactured.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: November 3, 1998
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Bong-Uk Jeong, Chang-Seob Kim, Dong-Gil Jang, Seok-Bong Shon
  • Dispenser cathode structure for use in electron gun
    Patent number: 5113110
    Abstract: A dispenser cathode for an electron gun comprises a reservoir for holding thermoelectron emissive material. A sleeve having an outward flange at a top portion thereof and receives the reservoir at the upper portion thereof and receives a heating element at the other end. A heat shielding tube is provided with an inward flange at the top thereof that overlaps and is welded to the outward flange of the sleeve. A holder for supporting the heat shielding tube is secured thereto.
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: May 12, 1992
    Assignee: Samsung Electron Devices Co., Ltd.
    Inventor: Dong-Gil Jang