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:
Sep. 12, 1978
Filed:
Jun. 21, 1977
Masayoshi Aya, Ibaraki, JP;
Kohji Hiya, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A convergence apparatus having a pair of four-pole static magnets and a pair of six-pole static magnets mounted rotatably at the neck portion of an in-line color CRT having three electron guns arranged laterally in a single file such that the pair of four-pole static magnets and a pair of six-pole static magnets are arranged in the axial direction of the neck portion. The magnetization density of the N poles and that of the S poles of at least one of the pairs of four-pole magnets and six-pole magnets are made to be different, and further the magnetization density of the two sheets of the static convergence magnets of which the magnetization density of the N poles and that of the S poles are different are made to be different, and thereby more certain and complete correction can be attained.