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:
Oct. 06, 1981
Filed:
Nov. 15, 1979
Ralph J D'Amato, Lancaster, PA (US);
RCA Corporation, New York, NY (US);
Abstract
The present invention provides an improvement in a corrugated apertured mask type color picture tube. The mask corrugations are substantially parallel and the mask has slit shaped apertures aligned in columns which are parallel to the mask corrugations and perpendicular to a major axis of the mask. The slits in each column are separated by web portions of the mask. The distance between the centers of two consecutive webs is defined as the web repeat distance. The slits form an aperture array wherein the lengthwise dimension of the slit columns vary with location on the mask. The tube also includes an electron gun for generating a plurality of electron beams and means for scanning the beams in lines across the mask. The improvement comprises making the web repeat distance within a slit column proportional to the distance from the major axis of the mask to the mask intercept of any particular scan line.