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:
Apr. 19, 2011
Filed:
Apr. 16, 2007
Ho-seong Jang, Daejeon, KR;
Duk-young Jeon, Daejeon, KR;
Ho-Seong Jang, Daejeon, KR;
Duk-Young Jeon, Daejeon, KR;
Abstract
The present invention relates to a phosphor and a white LED, more particularly, to a method for fabricating a yellow emitting Ce-activated silicate phosphor with a new composition represented as (SrMN)SiO:Ce, (0<x≦0.3, M includes at least one selected from alkaline earth metals on the periodic table, 0≦y≦1, N is at least one selected from alkali metals on the periodic table and 0≦z≦0.3) and a preparation method thereof and an LED using the same. The phosphor according to the present invention shows a broad band emission when it is excited by the existing InGaN-based blue LED and GaN-based ultraviolet LED with long wavelength. The LED using the phosphor according to the present invention has a broad emission with a wide spectral range and good color purity and very high light emitting efficiency when is applied to a LED and a backlight source of a liquid crystal display.