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:
Aug. 08, 2000
Filed:
Oct. 20, 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, and a pair of electrodes disposed down stream of a pre-focus lens and forming a final main lens. Each of the pair of electrodes have a common single opening for the three in-line electron beams in an end thereof opposing another of the pair of electrodes. A shield cup is fixed to a final electrode of the electron gun and has applied thereto the same potential which is applied the final electrode, the shield cup having a single aperture common to the three in-line electron beams. A focusing action of the pre-focus lens and a focusing action of the main lens are different between a center electron beam and a side electron beam of said three in-line electron beams, respectively.