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. 11, 2010
Filed:
Oct. 14, 2005
Yasuo Shimomura, Yokohama, JP;
Naoto Kijima, Yokohama, JP;
Tomoyuki Kurushima, Yokohama, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
To present a green- to yellow-emitting phosphor whereby a light-emitting device having high color rendering properties and high luminance can be obtained, a light-emitting device employing such a phosphor, and an image display device and a lighting system, containing such a light-emitting device. A phosphor made of a compound represented by the following formula (I), which comprises, as matrix, a compound of a garnet structure and which contains, as a luminescent center ion, a metal element in the matrix:MMXMMO  (I)wherein Mis Mg and/or Zn, Mis a bivalent metal element excluding Mg and Zn, X is a metal element as a luminescent center ion composed mainly of Ce, Mis a trivalent metal element excluding X, Mis a tetravalent metal element, and a, b, c, d and e are numbers satisfying the following formulae, respectively:0.001≦a≦0.52.5≦b≦3.30.005≦c≦0.51.5≦d≦2.3={()×2+()×3+12}/2.