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:
Jan. 05, 1993
Filed:
Dec. 04, 1989
Applicant:
Inventors:
Hidetsugu Matsukiyo, Koganei, JP;
Teruki Suzuki, Funabashi, JP;
Hajime Yamamoto, Tokyo, JP;
Yasuhiko Uehara, Chiba, JP;
Yasukazu Morita, Mobara, JP;
Yoshihiro Koseki, Chiba, JP;
Hiromichi Yamada, Hino, JP;
Shigeo Fujino, Odawara, JP;
Takashi Hase, Ebina, JP;
Tsutomu Yamada, Minamiashigara, JP;
Susumu Omatoi, Fujisawa, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Kasei Optonix Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
313468 ; 2523 / ; 2523 / ;
Abstract
Disclosed are terbium-activated oxide phosphors having incorporated, at least one of ytterbium, thulium, samarium and europium. Incorporation of the element (s) has made it possible to produce phosphors exhibiting high brightness and suffering little brightness deterioration under high-density electron bombardment.