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:
Aug. 18, 2020
Filed:
Apr. 27, 2018
Quarkstar Llc, Las Vegas, NV (US);
Steven C. Allen, Beverly, MA (US);
Andrew J. Steckl, Cincinnati, OH (US);
Quarkstar LLC, Las Vegas, NV (US);
Abstract
A light emitting device includes a light emitting diode (LED); a transparent optic having a refractive index n; and a phosphor layer spaced apart from the LED and positioned between the LED and the transparent optic. The phosphor layer has an effective refractive index n, where a gap between the LED and the phosphor layer has a refractive index nthat is less than n. The transparent optic has an inner convex surface in contact with the phosphor layer. The inner convex surface has an inner radius of curvature r; and an outer convex surface facing away from the phosphor layer and being a surface through which the light emitting device emits light into a medium adjacent the outer convex surface. The medium has a refractive index n. The outer convex surface has an outer radius of curvature R, such that r/R is equal to n/n.