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. 23, 2021
Filed:
Apr. 01, 2019
Applicant:
Joanneum Research Forschungsgesellschaft Mbh, Graz, AT;
Inventors:
Christian Sommer, Graz, AT;
Claude Leiner, Graz, AT;
Assignee:
Joanneum Research Forschungsgesellschaft mbH, Graz, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/13357 (2006.01); F21V 5/00 (2018.01);
U.S. Cl.
CPC ...
G02F 1/133611 (2013.01); F21V 5/007 (2013.01); G02F 1/133602 (2013.01); G02F 1/133606 (2013.01); G02F 1/133603 (2013.01); G02F 2001/133607 (2013.01);
Abstract
An optical apparatus with a distance-to-height ratio, DHR, greater than 2, operable to emit light with a homogenized radiance distribution, the apparatus comprising a plurality of light sources, arranged in an array, a diffusor device at an exit surface of the apparatus, a transparent substrate, arranged between the plurality of light sources and the exit surface, the substrate comprising a plurality of freeform, FF, optical structures wherein the freeform structures are arranged on a bottom side of the transparent substrate facing the light sources.