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:
Mar. 08, 2022
Filed:
Dec. 11, 2020
Lumileds Llc, San Jose, CA (US);
Antonio Lopez-Julia, Aachen, DE;
Venkata Ananth Tamma, San Jose, CA (US);
Lumileds LLC, San Jose, CA (US);
Abstract
A light-emitting device assembly includes a concave optical collector, a light-emitting device, and a light-escape surface. The collector redirects incident light by reflection, scattering, or reradiation. The light-emitting device emits device output light to propagate within the optical collector. The light-escape surface extends across an open end of the collector and exhibits (i) incidence-angle-dependent transmission of light that decreases with increasing incidence angle, or (ii) transmissive redirection of light to propagate at an angle less than a corresponding refracted angle, that are imparted by an array of nano-antennae, a partial photonic bandgap structure, a photonic crystal, an array of meta-atoms or meta-molecules, or a multi-layer dielectric thin film. Assembly output light transmitted by the light-escape surface includes first and second portions of the device output light that propagate within the collector without and with redirection, respectively, within the collector by the light-escape surface.