Patents by Inventor Heon-Chang Kim

Heon-Chang 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).

  • Electron gun for a color cathode ray tube
    Patent number: 5600201
    Abstract: An electron gun for a color cathode ray tube having a cathode, a control electrode and a screen electrode together constituting of a triode, and a main lens for focusing and accelerating an electron beam formed by the triode. The electron gun is characterized by a horizontally elongated electron beam passing hole formed in the control electrode having its long axis disposed in the arrangement direction of the electron beam passing hole. A horizontally elongated slot encompassing the electron beam passing hole having its long axis disposed in the arrangement direction of the electron beam passing hole is formed in the screen electrode opposed to the control electrode, thereby preventing the focusing characteristics of the electron beam from being reduced throughout the surface of the fluorescent layer by the influence of the deflection yoke.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: February 4, 1997
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Neung-Yong Yun, Heon-Chang Kim, Han-Shin Do, Il-Tae Kim