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. 21, 2006
Filed:
Mar. 02, 2004
Masafumi Kyogaku, Kanagawa, JP;
Masafumi Kyogaku, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide an electron-emitting device that can be used to manufacture an image forming apparatus having a superior display quality and in which the development of the abnormal light emission point is suppressed and the unevenness of brightness is not caused. The electron-emitting device includes: a cathode electrode and a gate electrode, which are formed on a base surface and opposed to each other with a space therebetween; and an electron-emitting film which is located on the cathode electrode, and in the electron-emitting device, the electron-emitting film has two end portions (A and B) in a plane substantially parallel to the base surface in a direction substantially perpendicular to a direction along which the cathode electrode and the gate electrode are opposed to each other, and a structure is used in which electric field strengths applied between each of the two end portions (A and B) of the electron-emitting film and the gate electrode are made weaker than an electric field strength applied between a region between the two end portions (A and B) of the electron-emitting film and the gate electrode at a time of driving.