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:
Dec. 27, 2011
Filed:
Feb. 23, 2010
Applicants:
Shoshiro Saruta, Sagamihara, JP;
Makoto Souma, Yokohama, JP;
Atsushi Miida, Fujisawa, JP;
Akemi Watanabe, Hiratsuka, JP;
Inventors:
Shoshiro Saruta, Sagamihara, JP;
Makoto Souma, Yokohama, JP;
Atsushi Miida, Fujisawa, JP;
Akemi Watanabe, Hiratsuka, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
Degradation of a fluorescent material used in an image display device provided with an electron emitting device that is caused by heating in the process of manufacturing the device is prevented. A coating layercomposed of SiOis formed on the surface of fluorescent material particles, and any metalfrom among Bi, Pb, Sn, and Sb is added to the coating layerso that the metal concentration at the surface of the coating layer is equal to or greater than 0.05 ppm.