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:
Sep. 19, 1989
Filed:
Feb. 22, 1988
Cornelius J Paridaens, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A color cathode ray tube having an in-line electron gun in which convergence drift is reduced significantly by providing conductive islands (32,34) in the form of metal mirrors on the internal wall of the neck. The islands (32,34) are located on and about the plane of the electron beams and face only the higher voltage one of the main focusing electrodes (g3,g4). The islands (32,34) float electrically. Additionally convergence stability can be improved by providing a ring or strip (36) about the external surface of the neck in the vicinity of the gap between the focusing electrodes (93,94), which ring or strip (36) is connected to a point of fixed potential such as ground.