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:
Jan. 25, 2005
Filed:
Nov. 30, 2000
Naoto Abe, Kanagawa, JP;
Hideaki Mitsutake, Kanagawa, JP;
Naoto Abe, Kanagawa, JP;
Hideaki Mitsutake, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There are provided an electron source apparatus capable of suppressing variations in electron emission state from electron-emitting devices even with an arrangement using spacers (), and an image forming apparatus using the electron source apparatus. A plurality of row-direction wiring lines () and a plurality of column-direction wiring lines () are formed on a substrate () so as to cross each other. An electron-emitting device made up of device electrodes (), a conductive film (), and an electron-emitting portionis formed at each intersection between the row-direction wiring line () and the column-direction wiring line (). The spacers () are arranged on some of the row-direction wiring lines (). The column-direction wiring lines () are respectively connected to controlled constant current sources () serving as current sources capable of outputting desired current values. The respective row-direction wiring lines () are connected to a voltage application means constituted by a voltage source () and a switching circuit () for selecting the row-direction wiring lines () while sequentially scanning them.