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:
Jun. 10, 1980
Filed:
Mar. 23, 1978
Shinpei Koshigoe, Fukaya, JP;
Tokyo Shibaura Electric Co., Ltd., Kawasaki, JP;
Abstract
An in-line type electron gun assembly for a color picture tube which is designed to emit a central electron beam and two side electron beams running along both sides of the central electron beam and can suppress coma aberration, thereby providing a highly resolved color picture and enable a high quality color picture tube to be manufactured at a low cost, and wherein a main convergence electrostatic lens is formed by a pair of serially arranged electrode means whose components are formed integrally to handle the respective electron beams; at least one of the paired electrode means is composite electrode consisting of a plurality of electrode plates each bored with three openings corresponding to said electron beams; and the axes of both side openings of the respective electrode plates of at least the composite one of said electrode means are displaced from the axis of the central electron beam at a progressively larger rate according as the position of the respective electrode plates is drawn nearer to the phosphor screen.