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:
Dec. 21, 1999
Filed:
Oct. 07, 1997
Katsuhiko Shinjo, Isehara, JP;
Hideaki Mitsutake, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A plurality of electron-emitting devices carried on a device substrate are arranged vis-a-vis an acceleration electrode carried on a face plate. The device substrate and the face plate, together with side walls disposed therebetween, constitute an envelope the inner space of which is kept under vacuum. A number of spacers are also disposed between the device substrate and the face plate within the inner space. The electric potential V.sub.a applied to the acceleration electrode, the distance l between the electron-emitting devices and the corresponding respective spacers, and the distance d between the electron-emitting devices and the acceleration electrode satisfy the relationship, V.sub.a .multidot.l.sup.2 /d.sup.2 >.vertline..DELTA.V.sub.sat .vertline./(2.multidot..alpha..multidot..beta.), where .alpha. and .beta. are constants determined from several factors and .DELTA.V.sub.sat is the potential deviation of the spacer surface under charged conditions from that under uncharged conditions.