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:
Jul. 07, 1992
Filed:
Apr. 03, 1991
Applicant:
Inventor:
Ger-Wim J Goorhuis, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
445-5 ; 445-6 ; 445 36 ;
Abstract
A method of manufacturing a cathode ray tube which includes an electron gun (3) having a number of electrodes (7, 8) and a resistive-layer lends system (5), characterized in that the electron gun is sparked in a manufacturing step in which a pulse voltage is applied to an electrode (8) and a direct voltage is applied to a part (9) of the resistive-layer lens system adjacent to said electrode (8) through supply leads. During the sparking step measures are taken to prevent the occurrence of sparks in the resistive-layer lens system (5) per se, which in turn prevents damage to the resistive-layer lens system.