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. 09, 1991
Filed:
Apr. 10, 1986
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 ...
313412 ; 313413 ; 313414 ; 313431 ;
Abstract
In a color display tube of the so-called 'in-line' type, the magnetic field which extends substantially parallel to the plane through the beam axes is distorted so as to be locally pincushion-shaped by means of field shapers at the end of the electron gun system. This effects coma correction for the rasters produced by the three electron beams at the display screen, without causing substantial deflection defocusing of the side beams.