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:
Dec. 14, 2010
Filed:
May. 13, 2009
Weidong Zhuang, Beijing, CN;
Yunsheng HU, Beijing, CN;
Zhen Long, Beijing, CN;
Shusheng Zhang, Beijing, CN;
Xiaowei Huang, Beijing, CN;
Hongwei LI, Beijing, CN;
Weidong Zhuang, Beijing, CN;
Yunsheng Hu, Beijing, CN;
Zhen Long, Beijing, CN;
Shusheng Zhang, Beijing, CN;
Xiaowei Huang, Beijing, CN;
Hongwei Li, Beijing, CN;
General Research Institute for Nonferrous Metals, Beijing, CN;
Grirem Advanced Materials Co., Beijing, CN;
Abstract
A phosphor can be excited by UV, purple or blue light LED, its production and the light emitting devices. The general formula of the phosphor is LnM(O,F):(R,M'), wherein, Ln is at least one metal element selected from a group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm, 2.6≦a≦3.4; M is at least one element selected from a group consisting of B, Al and Ga, 4.5≦b≦5.5; R is at least one metal element selected from a group consisting of Ce and Tb; M′ is at least one metal element selected from a group consisting of Ca, Sr, Ba, Mn and Zn, 0.001≦x≦0.4. The phosphor possesses broad emitting range, high efficiency, better uniformity and stability. A light emitting device can be obtained by incorporating this phosphor into a UV, purple or blue light emitting device.