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:
Jan. 05, 1993
Filed:
Mar. 06, 1991
Applicant:
Inventor:
Katsuei Morohashi, Saitama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
445-3 ; 445-6 ;
Abstract
Magnetization of a magnetic member used for correcting the static convergence and color purity of a color cathode ray tube apparatus must be performed in consideration of the influences of geomagnetism. A magnetization unit used for magnetizing the magnetic member changes the state of geomagnetism around the neck of the apparatus. However, the magnetization unit can establish the same state of geomagnetism as that obtained when the magnetization unit is not arranged. This allows accurate correction of the static convergence and the color purity.