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:
Apr. 23, 1996
Filed:
Jul. 11, 1994
Applicant:
Inventor:
Masaru Nagashima, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ; H01J / ;
U.S. Cl.
CPC ...
315-8 ; 315 85 ; 315370 ;
Abstract
A method and apparatus for correcting the tracking of an electron beam which includes the steps of generating a supplemental magnetic field, generating a reverse magnetic field and removing the correcting magnetic field. The direction of the supplemental magnetic field is substantially the same as the direction of a terrestrial magnetism. The reverse magnetic field substantially offsets the terrestrial magnetism.