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:
Jul. 22, 2025
Filed:
Nov. 28, 2023
Azumo, Inc., Chicago, IL (US);
Anthony Nichol, Orono, MN (US);
Zane Coleman, Elmhurst, IL (US);
Azumo, Inc., Chicago, IL (US);
Abstract
A light emitting device comprises a lightguide formed from a film with a core layer, a light emitting region, a light mixing region, at least one light source, and a light absorbing cladding region on at least one lateral edge of the core layer. In one embodiment, the cladding region is on the lateral edges of the core layer in the light mixing region. The light absorbing material in the cladding region may absorb light from the at least one light source propagating in the cladding region at an angle greater than 40 degrees to the optical axis. The difference in refractive index for the core material and cladding material may be between 0.001 to 0.01. The full angular width at half maximum intensity of light exiting the light emitting region may be less than 60 degrees in air in a first illumination plane.