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:
Jun. 07, 2011
Filed:
Sep. 19, 2008
Weidong Zhuang, Beijing, CN;
Yunsheng HU, Beijing, CN;
Zhen Long, Beijing, CN;
Xiaowei Huang, Beijing, CN;
Hongwei LI, Beijing, CN;
Shusheng Zhang, Beijing, CN;
Huagiang He, Beijing, CN;
Weidong Zhuang, Beijing, CN;
Yunsheng Hu, Beijing, CN;
Zhen Long, Beijing, CN;
Xiaowei Huang, Beijing, CN;
Hongwei Li, Beijing, CN;
Shusheng Zhang, Beijing, CN;
Huagiang He, Beijing, CN;
General Research Institute for Nonferrous Metals, Beijing, Beijing, CN;
Grirem Advanced Materials Co., Ltd., Beijing, CN;
Abstract
A phosphor can be excited by UV, purple or blue light LED, its preparation method, and light emitting devices incorporating the same. The phosphor contains rare earth, silicon, alkaline-earth metal, halogen, and oxygen, as well as aluminum or gallium. Its General formula of is aLnO.MO.bM'O.fSiO.cAX:dR, wherein Ln is at least one metal element selected from a group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm; M is at least one metal element selected from a group consisting of Ca, Sr and Ba; M′ is at least one metal element selected from Al and Ga; A is at least one metal element selected from a group consisting of Li, Na, K, Mg, Ca, Sr and Ba; X is at least one element selected from F and Cl; R is at least one metal element selected from a group consisting of Ce, Eu, Tb and Mn; 0.01≦a≦2, 0.35≦b≦4, 0.01≦c≦1, 0.01≦d≦0.3, 0.01≦f≦3, 0.6≦e≦2.4. The phosphor has broad emitting range, high efficiency, better uniformity and stability. A light emitting device is obtained by incorporating the phosphor into a UV, purple or blue light emitting device.