Patents by Inventor Hansin Dho

Hansin Dho 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).

  • In-line type electron gun for color cathode ray tube
    Patent number: 5451834
    Abstract: An electron gun for use in a color picture tube which can reduce the astigmatism of main electron lenses and to make small circular beam spots. The electron gun has three cathodes each injecting an electron beam respectively and main electron lenses which concentrate the three electron beams onto a fluorescent screen, wherein a third electrode and a fourth electrode consisting the main electron lenses are formed by two large apertured electrodes facing each other and two small apertured electrodes each having three apertures for correcting the astigmatism.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: September 19, 1995
    Assignee: Samsung Electron Devices Co., Ltd.
    Inventors: Hansin Dho, Neungyong Yeun