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. 01, 1992
Filed:
May. 15, 1991
Applicant:
Inventors:
Assignee:
Futaba Denshi Kogyo K.K., Mobara, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; G09G / ;
U.S. Cl.
CPC ...
313422 ; 313423 ; 313414 ;
Abstract
An electron feeder for a flat-type luminous device capable of providing electrons sufficient to ensure the uniform luminance of a whole display section irrespective of a distance from an electron source. A plurality of front electrodes and a plurality of rear electrodes constituting an electron beam guide are arranged separate from one another in the direction of traveling of the electrons, respectively, and the front electrode and rear electrode corresponding to each other constitute each guide electrode section. The so-constructed guide electrode sections are alternately applied thereto two different voltages, resulting in the electron beam guide exhibiting the function of focusing electrons.