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. 05, 1996
Filed:
Jun. 24, 1994
Yoichi Kobori, Mobara, JP;
Futaba Denshi Kogyo Kabushiki Kaisha, Mobara, JP;
Abstract
A drive device for a field emission cathode capable of driving an image display device at a high speed while preventing leakage luminescence. A plurality of gate electrodes and cathode electrodes which are arranged in a matrix-like manner are scanned to drive an image display device. A leading edge of a drive pulse for driving the cathode electrodes in turn is defined to be a precharge period, during which a precharge pulse of a level V.sub.CH which does not permit emission of electrodes from emitter arrays is added. During the precharge, the gate electrodes are subject to blanking by a blanking pulse. This results the cathode electrodes being driven, followed by precharging, so that the cathodes may be driven at an increased speed while preventing leakage luminescence.