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:
Sep. 15, 1987
Filed:
Oct. 21, 1985
Applicant:
Inventor:
Yasukazu Morita, Mobara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; C09K / ;
U.S. Cl.
CPC ...
313468 ; 25230165 ; 2523 / ;
Abstract
Disclosed is a cathode ray tube including a white emitting phosphor screen comprising, in mixing, a blue emitting phosphor having the composition expressed by a composition formula (M.sub.1-x Tb.sub.x).sub.2 O.sub.2 S (wherein M is Y and/or Gd, and the range of x is 0<x.ltoreq.0.01) and at least one other phosphor which does not contain Cd. This cathode ray tube has less luminance deterioration and burning of the phosphor screen, and it causes no pollution.