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:
Feb. 09, 2010
Filed:
May. 17, 2007
Tomoyasu Yano, Ageo, JP;
Asuka Sasakura, Ageo, JP;
Jun-ichi Itoh, Ageo, JP;
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Abstract
A white phosphor is provided, which is a white phosphor comprising a single material, wherein the light-emitting center is one element other than Mn, and emitting white light having excellent color rendering properties by near ultraviolet excitation. The white phosphor is represented by the formula SrSMgZnSiO:Eu(with the proviso that when e=1, 0<(c+d)/(a+c+d)≦0.2, 1.8≦a+c+d≦2.2, 0≦b/(b+f)≦0.07 and 3.0≦b+f≦4.4), among which, as one preferred example, the white phosphor is represented by the composition formula (SrOS).(MgZnO).(SiO):Eu(in the formula, 4.5≦x/y≦27.5, 3≦z/y≦14.5, 0≦α≦0.3 and 0≦β≦0.7) is proposed.