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:
Mar. 16, 1999
Filed:
Jun. 30, 1997
Norifumi Kikuchi, Kanagawa, JP;
Yasunobu Amano, Tokyo, JP;
Naruhiko Endo, Fukushima, JP;
Yoichi Ohshige, Kanagawa, JP;
Masahiko Mizuki, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
An in-line electron gun for a color cathode ray tube having a main lens comprised of an in-line focusing electrode and accelerating electrode, with which it is possible to easily improve an assembly precision of field-correcting electrode plates provided at the focusing electrode and accelerating electrode and having three through apertures through which the R, G, and B electron beams pass and with which it is possible to easily perform an adjustment of aberration of the main lens. The two side through apertures among the three through apertures formed in the field-correcting electrode plate provided at the focusing electrode and accelerating electrode are formed basically as circular apertures with arc shaped cut-away portions continuous with the outside of the circular apertures and concentric with the circular apertures.