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. 20, 2017
Filed:
Oct. 11, 2013
Performance Indicator, Llc, Lowell, MA (US);
Weiyi Jia, Chelmsford, MA (US);
PERFORMANCE INDICATOR, LLC, Lowell, MA (US);
Abstract
Disclosed are smoothing phosphors for AC LED lighting that are capable of prolonging the light emission time of an AC LED (or array of AC LEDs) during a ½ cycle response to a, phase change of the alternating current to substantially reduce flicker. The smoothing phoshor of the present teachings comprises a matrix represented by the formula: (−k−r−v)M·(m−p)X·(n−0.5x−0.5y)AlO:(x+p)MnO, ySiO, kEu, rR, vLi, wherein M is at least one of LaO, CeO, GdO, LuO, BaOF, SrOF, CaOF, BaOCl, SrOCl, CaOCl, BaO, SrO, CaO, or ZnO; provided that when M comprises BaO, SrO, CaO, or ZnO, M does not comprise LaO, CeO, GdO, LuO, BaOF, SrOF, CaOF, BaOCl, SrOCl, or CaOCl; X is at least one of MgO or ZnO; R is at least one of Sm, Pr, Tb, Dy, Er, or Ho; m=0 to 2; n=4 to 11; x=0.005 to 1; y=0.005 to 1; p=0 to 1; k=0 to 0.2; r=0 to 0.2; and v=0 to 0.2.