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. 04, 2000
Filed:
Mar. 31, 1999
Masayoshi Misono, Chousei-gun, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A color cathode ray tube includes an electron gun for generating and focusing three in-line electron beams, a deflection device for deflecting the three electron beams in the horizontal and vertical directions, and a phosphor screen which luminesces when the electron beams impinge thereon. A pair of electrodes of a plurality of electrodes form a final main lens between single openings provided in opposing ends of the pair of electrodes, each of the single openings being common to the three in-line electron beams, and a size of an aperture for a center electron beam of the three in-line electron beams in at least one of the first grid electrode and the second grid electrode is smaller than that of an aperture for a side electron beam of the three in-line electron beams in the at least one of the first grid electrode and the second grid electrode.