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:
Apr. 13, 1999
Filed:
Mar. 21, 1997
Katsumi Hirota, Mobara, JP;
Tetsuo Asano, Mobara, JP;
Nobuyuki Suzuki, Isumi-gun, JP;
Yasuo Tanaka, Mobara, JP;
Hiroshi Nakamoto, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A cathode ray tube is provided with an electron gun having an electron lens including a large-diameter cylinder electrode and a small-diameter cylinder electrode composed of a large-diameter cylinder portion and a small-diameter cylinder portion, and at least the large-diameter cylinder portion of the small-diameter cylinder electrode is inserted in the large-diameter cylinder electrode thereby forming the electron lens. The small-diameter cylinder portion extending in the tube axis direction of the large-diameter cylinder electrode and connected to the large-diameter cylinder electrode is expanded or bulged, or the bottom portion of the large-diameter cylinder electrode is removed while only the electrode support portion connected to the large-diameter cylinder electrode is left, so that the electrode support fixed to the outer surface of the small-diameter cylinder portion of the small-diameter cylinder electrode can pass therethrough.