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:
Oct. 20, 1998
Filed:
Mar. 21, 1996
Katsutoshi Ohno, Tokyo, JP;
Tsuneo Kusunoki, Kanagawa, JP;
Kenji Takayanagi, Kanagawa, JP;
Masaru Ihara, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A cathode-ray tube includes a phosphor screen having a tricolor phosphor layer composed of a red phosphor, a green phosphor of ZnS:Cu, Al activated with Ni, Fe, or Co, and a blue phosphor of ZnS:Ag activated with Ni, Fe, or Co. The green phosphor and the blue phosphor have a decay intensity of at most 0.5% upon elapse of 8 milliseconds after excitation is removed therefrom. The green phosphor of ZnS:Cu, Al activated with Ni and the blue phosphor of ZnS:Ag activated with Ni have their afterglow characteristics substantially equalized to the afterglow characteristics of the red phosphor of Y.sub.2 O.sub.2 S:Eu.