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. 16, 1991
Filed:
Mar. 28, 1990
Futaba Denshi Kogyo K.K., Mobara, JP;
Abstract
An electron feed structure for a flat-type luminous device capable of permitting electron emitted from an electrons source to be uniformly fed throughout a display section. The electron feed structure includes an electron flow guide constituted by an inner guide electrode of a high voltage and an outer guide electrode of a low voltage, so that an electric field of a high voltage and that of a low voltage may be alternately formed to form electrostatic lenses in the guide, to thereby effectively prevent the function of the electron flow guide from being deteriorated. A guide voltage applied to each of the electrode segments of the inner guide electrode is rendered constant and a guide voltage applied to each of the electrode segments of the outer guide electrode is likewise rendered constant, to thereby cause the correlation between the guide voltage and a deflection voltage applied to the electron flow guide to be uniform irrespective of a position within the electron flow guide, resulting in electrons emitted from the electron source being drawn out under the same conditions.