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. 09, 2004
Filed:
Dec. 21, 2001
Hirofumi Nakamura, Aichi, JP;
Hideki Miyazaki, Aichi, JP;
Yoshio Fuwa, Aichi, JP;
Hiroshi Ushida, Aichi, JP;
Sony Corporation, , JP;
Abstract
In an adjusting method for a cathode position of an electron gun, an apex point of a dome-shaped cathode is detected and then a positional adjustment is executed by moving a first grid in a X-Y direction so that a center of a grid aperture is coincided with the position of the apex point, at first. Next, a sleeve ring and a collar portion of a sleeve holder are welded together by a laser beam. The a dgk-vale adjustment is done so as for a gap between first grid and apex point of the cathode to be a predetermined value and welded by irradiating the laser beam to a superposed position of the cathode structure and the sleeve. According to the present invention, these positioning adjustment and the dgk-value adjustment are able to be executed independently.