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:
Jul. 27, 2004
Filed:
Jul. 23, 2001
Hiroshi Iwamoto, Osaka, JP;
Shin-ichiro Hatta, Nara, JP;
Ryuichi Murai, Osaka, JP;
Masaki Kawasaki, Osaka, JP;
Shigeo Nakatera, Osaka, JP;
Tomohisa Mikami, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An internal magnetic shield includes a pair of opposing long side walls ( ), a pair of opposing short side walls ( ), and an opening ( ) enclosed by these side walls in the center. The short side walls ( ) are provided with notches ( ) having a substantially home-plate shape. This configuration can reduce mislanding of an electron beam on the entire screen and easily balance the amount of mislanding due to geomagnetism in the tube-axis direction and in the horizontal direction perpendicular to the tube axis. As a result, a cathode ray tube capable of displaying images without displacement and unevenness of colors can be provided.