Patents by Inventor Joyung Yun

Joyung Yun 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).

  • Shadow mask for use in a three-gun color picture tube
    Patent number: 5055736
    Abstract: A shadow mask for use in a three-gun color picture tube comprising a number of electron beam transmission holes, the length of the bridge portion between two vertically adjacent ones of said electron beam transmission holes being constant, the vertical pitch of said electron beam transmission holes being varied between Py+.DELTA.x and Py-.DELTA.x so as to reduce moire effect, .DELTA.x being obtained from the following formula when n=3, 4: ##EQU1## wherein Py is the vertical pitch of the electron beam transmission holes of a shadow mask, Ps the pitch of scanning lines, fa the pitch frequency of the shadow mask, and fs the scanning frequency.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: October 8, 1991
    Assignee: Samsung Electron Devices Co., Ltd.
    Inventors: Joyung Yun, Hojin Cho