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:
Sep. 01, 2009
Filed:
May. 18, 2005
Koki Nukanobu, Kanagawa-Ken, JP;
Keisuke Yamamoto, Kanagawa-Ken, JP;
Tamaki Kobayahsi, Kanagawa-Ken, JP;
Takuto Moriguchi, Kanagawa-Ken, JP;
Koki Nukanobu, Kanagawa-Ken, JP;
Keisuke Yamamoto, Kanagawa-Ken, JP;
Tamaki Kobayahsi, Kanagawa-Ken, JP;
Takuto Moriguchi, Kanagawa-Ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
By applying a drive voltage Vf [V] between first and second conductive films, when electrons are emitted by the first conductive film, an equipotential line of 0.5 Vf [V] is inclined toward the first conductive film, rather than toward the second conductive film, in the vicinity of the electron emitting portion of the first conductive film, in a cross section extending across the electron emitting portion and the portion of the second conductive film located nearest the electron emitting portion. The present invention improves electron emission efficiency.