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. 16, 1990
Filed:
May. 07, 1987
Applicant:
Inventor:
Piet G Barten, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
315368 ; 335211 ;
Abstract
A method of post deflection correction of electron beam misconvergence in a color display tube, the method comprising: providing at least one permanently magnetizable substantially annular element externally of the tube envelope on the screen side of the plane of deflection of the deflection yoke; measuring the convergence errors at the screen; and magnetizing the element as a multipole to correct for the measured errors. The annular element may be mounted directly on the tube envelope, or may be secured to the deflection yoke.