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:
Dec. 03, 1991
Filed:
Aug. 09, 1990
Nobutaka Okuyama, Yokohama, JP;
Soichi Sakurai, Yokohama, JP;
Kouji Kitou, Yokohama, JP;
Michitaka Ohsawa, Fujisawa, JP;
Ichiro Niitsu, Yokohama, JP;
Hiroshi Yoshioka, Mobara, JP;
Atushi Takeyama, Odawara, JP;
Masao Obara, Yokohama, JP;
Isao Yoshimi, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Mizusawa Elec. Co Ltd, Tokyo, JP;
Abstract
A ring magnetic sub-core having a plurality of protrusions inside is disposed adjacent to an electron gun side of a main magnetic core on which a horizontal deflection coil and a vertical deflection coil are wound, and an auxiliary vertical deflection coil connected with said vertical deflection coil is wound around said magnetic sub-core, thereby making it possible to have both improvement of convergence performance and reduction of barrel distortion be consistent with each other. Further, a convergence coil is wound around said magnetic sub-core so as to correct a transverse raster or a longitudinal raster.