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. 08, 1990
Filed:
Jun. 22, 1988
Applicant:
Inventors:
Yasukazu Morita, Mobara, JP;
Yasuhiko Uehara, Chiba, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313468 ; 2523 / ;
Abstract
This invention relates to a phosphor prepared by mixing a green emitting phosphor InBO.sub.3 :Tb having an excellent color tone with other green emitting phosphors having a short decay time such as Y.sub.3 Al.sub.5-m Ga.sub.m O.sub.12 :Tb in amounts such that the 'decay time to 10% of peak brightness' measured by a raster spot method is below 10 ms. The phosphor screen of a projection cathode-ray tube is formed by use of this phosphor. The projection cathode-ray tube thus produced has an excellent color tone and a short decay time.