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:
Mar. 19, 2013
Filed:
Nov. 20, 2008
Hirofumi Kanda, Osaka, JP;
Tadashi Iwamatsu, Osaka, JP;
Toshihiro Tamura, Osaka, JP;
Hiroyuki Hirakawa, Osaka, JP;
Yoshio Ichii, Osaka, JP;
Hirofumi Kanda, Osaka, JP;
Tadashi Iwamatsu, Osaka, JP;
Toshihiro Tamura, Osaka, JP;
Hiroyuki Hirakawa, Osaka, JP;
Yoshio Ichii, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An electron emitting element () includes a substrate (), an upper electrode (), and a fine particle layer () sandwiched between the substrate () and the upper electrode (). The fine particle layer () includes metal fine particles () with high resistance to oxidation, and insulating fine particles () larger in size than the metal fine particles (). The electron emitting element () can steadily emit electrons not only in vacuum but also in the atmosphere. Further, the electron emitting element () can work without electric discharge so that harmful substances such as ozone, NOx, or the like are scarcely generated. Accordingly, degradation of the electron emitting element () due to oxidation does not occur. Therefore, the electron emitting element () has a long life and can steadily work continuously for a long period of time even in the atmosphere.