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:
Jan. 15, 2002
Filed:
Dec. 11, 2000
Mutsumi Maehara, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A color cathode-ray tube includes a panel portion, a neck portion, a funnel portion connecting the panel and neck portions, a fluorescent layer formed on an inner surface of a face plate of the panel portion, a shadow mask disposed opposite to the fluorescent layer, an electron gun housed in the neck portion, and an internal magnetic shield disposed in the funnel portion. The internal magnetic shield is formed in a substantially quadrangular pyramid-shape having a substantially rectangular first opening with a smaller diagonal dimension at one end adjacent to the electron gun and a substantially rectangular second opening with a larger diagonal dimension than the smaller diagonal dimension at the other end adjacent to the shadow mask. The internal magnetic shield has a long side wall including a long side of the first opening and a size adjustment side wall for the long side connecting to the long side wall, and has a short side wall including a short side of the first opening and a size adjusting side wall for the short side connecting to the short side wall.