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. 20, 1998
Filed:
Jan. 02, 1996
Applicant:
Inventors:
Jan P Adriaanse, Eindhoven, NL;
Johannes H Bohlander, Eindhoven, NL;
Willibrordus AJ.A. Van Der Poel, Eindhoven, NL;
Assignee:
U.S. Phillips Corporation, N.Y., NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313412 ; 313414 ;
Abstract
A colour display tube has an in-line electron gun for generating three co-planar electron beams first and second lens electrode produce a focusing lens field for focusing the electron beams. At least one of the lens electrodes has a correction element for tuning the astigmatism of the lens field. The correction element includes three co-linear apertures for passing the electron beams, the outer apertures of which are funnel-shaped, the wide end of the funnel-shape being directed away from the center aperture.