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:
Nov. 04, 1980
Filed:
Feb. 15, 1978
Hitachi, Ltd., , JP;
Abstract
Improvements in an electron gun assembly for a color picture tube comprising three electron guns arranged in an in-line relation, each of said three electron guns having three grid electrodes which have respective cylindrical portions of the same inside diameter and are arranged spacedly from each other on the same axis, and the non-central two of which are kept at the same electric potential. At least one of the non-central two grid electrodes is not required to be provided with an inner electrode so that it consists only of cap electrodes, and height i.e. the axial length of the inside cylinders of the respective cap electrodes of the non-central electron guns and the central electron guns are selected to be individually less than the inside diameter (D) of the electrodes.