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:
May. 29, 2001
Filed:
Oct. 28, 1998
Matsushita Electronics Corporation, Osaka, JP;
Abstract
A reinforcing electrode plate having at least one electron-beam through-hole that passes an electron beam is connected to at least one of a focusing electrode and a final accelerating electrode at its opening portion. Supporting portions of the reinforcing electrode plate are formed so as to project further outside than the opening portion or the peripheral face of the electrode, thus fixing the reinforcing electrode plate to an insulating support. Therefore, the deformation of the focusing electrode or the final accelerating electrode that occurs in assembling a main lens of an electron gun used for a color cathode-ray tube is prevented, thus decreasing the variation in property of the electron gun. Additionally, by adjusting the shape or the like of an opening through which an electron beam passes in the reinforcing electrode plate, a focusing power of the main lens can be adjusted in the horizontal direction and in the vertical direction.