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. 14, 2006
Filed:
Oct. 01, 2004
Noritake Suzuki, Kanagawa, JP;
Shigeki Yabu, Kanagawa, JP;
Noritake Suzuki, Kanagawa, JP;
Shigeki Yabu, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus comprising: a cathode; a gate; an anode; an electron emitting element arranged on the cathode; an image forming member that is arranged opposite to the electron emitting element; a deflection electrode that deflects the orbit of the electron emitted from the electron emitting element and headed toward the anode; and a driver, wherein assuming that an electric field required to start electron emission from the electron emitting element is Ee, that an electric field applied to the electron emitting element by applying voltage to the anode is Ea and that an electric field applied to the electron emitting element by applying voltage to the gate is Eg, the driver applies voltages to the cathode, the gate, and the anode in such a way that (i) Ea>Ee or (ii) Ea+Eg>Ee and Ea>Eg is satisfied.