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:
May. 15, 2001
Filed:
Sep. 18, 1996
Applicant:
Inventors:
Hisaaki Kawade, Yokohama, JP;
Tatsuya Iwasaki, Atsugi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 9/02 ; H01J 9/42 ;
U.S. Cl.
CPC ...
H01J 9/02 ; H01J 9/42 ;
Abstract
In an electron source having a plurality of surfaceconduction electron-emitting devices, the electrical characteristics of the surfaceconduction electron-emitting devices are made, controllable, and uniform. For this purpose, the electron emission characteristic of a selected surfaceconduction electron-emitting device is adjusted with a correction process of applying a voltage higher than a practical driving voltage to the device.