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:
Jun. 10, 1980
Filed:
Apr. 06, 1978
Applicant:
Inventor:
Robert F Van der Ven, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313403 ; 313408 ;
Abstract
Disclosed is a color display tube having a color selection electrode comprised of a metal plate having a large number of apertures and a plurality of elongated conductors insulated from the plate which extend across the apertures and divide them into two substantially symmetrical halves. Upon application of a suitable potential difference between the conductors and the plate, electric fields are produced in the apertures which deflect the portions of the beam passing through the respective aperture halves towards each other forming on the display screen a single, overlapping electron spot of a width smaller than that of the aperture.