The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 2004
Filed:
May. 05, 2003
Applicant:
Inventors:
Seong-Seob Kim, Yongin, KR;
Tok-Chin Woo, Kyungki-do, KR;
Assignee:
Samsung SDI Co., Ltd., Suwon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/940 ; H04N 9/29 ;
U.S. Cl.
CPC ...
H01J 1/940 ; H04N 9/29 ;
Abstract
A cathode ray tube includes an evacuated envelope including a face panel, a funnel, and a neck; a color selection apparatus mounted inwardly from the face panel; an electron gun mounted within the neck; a magnetic shield mounted connected to the color selection apparatus; and degaussing coils mounted to an outer surface of the evacuated envelope. A degaussing current flowing to the degaussing coils has a waveform such that a line connecting a peak A from where a maximum current value first starts to decrease and a peak G of a sixth cycle is a functional curve of a second degree or greater.