Patents by Inventor Ching-Hsian Tseng

Ching-Hsian Tseng 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).

  • Patent number: 6157120
    Abstract: A color cathode ray tube (CRT) employs a color selection electrode in the form of a thin shadow mask located adjacent the CRT's display screen and having an array of electron beam passing apertures arranged in vertical columns and horizontal rows. To correct for electron beam landing tilt of three inline electron beams on the CRT's display screen arising from the spherical shape of the CRT's shadow mask and display screen, the shadow mask is provided with a two-step function defining the vertical pitch (P.sub.v) of its apertures, or the vertical spacing between adjacent apertures not in the same vertical column. A first quadratic equation is used for defining the vertical pitch of the shadow mask's beam passing apertures covering a first generally flat inner area of the CRT's display screen from the center of the display screen out to where its radius of curvature substantially decreases adjacent its periphery.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: December 5, 2000
    Assignee: Sanchong Picture Tubes, Ltd.
    Inventors: Ching-Hsian Tseng, Hua Chung, Kuo-Cheng Chen