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:
May. 08, 1979
Filed:
May. 16, 1977
Applicant:
Inventors:
Wieslaw W Siekanowicz, Lawrenceville, NJ (US);
Thomas L Credelle, East Windsor, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
313422 ;
Abstract
An envelope of a display device includes a rear wall and a front wall having a cathodoluminescent screen thereon. Within the envelope are a plurality of electron beam guides and means for extracting electron beams out of the guide at various points. The electron beam guide comprises a first guide grid parallel to and spaced from the rear wall and a guide grid structure between the first grid and the front wall. Although there are unequal electric fields on the front and rear sides of the beam guide, the first guide grid and the guide grid structure maintain symmetry of the electric fields within the guide.