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:
Jan. 03, 1995
Filed:
Feb. 02, 1993
Filippo Mancini, Rome, IT;
Videocolor, S.p.A., Anagni, IT;
Abstract
An improved color picture tube has a viewing screen, a shadow mask located adjacent to the screen, and an electron gun for generating and directing a plurality of electron beams through the mask to the screen. The mask has a rectangular periphery with two long sides and two short sides. A major axis passes through the center of said mask and parallels the long sides, and a minor axis passes through the center of the mask and parallels the short sides. The mask includes slit-shaped apertures aligned in columns that essentially parallel the minor axis. Adjacent apertures in each column are separated by tie bars in the mask. The beams are scanable over the screen in scanning lines that parallel the major axis. The improvement comprises the length of the apertures, measured in the direction of the minor axis, being approximately equal to a multiple of the center-to-center distance between adjacent scanning lines, measured in the direction of the minor axis.