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. 28, 2000
Filed:
Oct. 28, 1999
Applicant:
Inventor:
Akihiko Okamoto, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
3151693 ; 3151691 ; 345 74 ;
Abstract
In a field emission cold cathode device including one emitter, a supporting region formed of a conductor or a semiconductor for supporting the emitter, and a gate electrode provided in the proximity of the emitter, electrons are supplied to the emitter from a capacitance formed by a pair of electrodes separated from each other, one of the pair of electrodes being DC connected to the emitter. The emitted electron amount can be controlled by controlling a voltage applied to the other of the pair of electrodes. Thus, it is possible to minimize the variation in the emission current caused by variation in the emitter devices, which was unavoidable in the prior art.