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:
Jan. 21, 2025
Filed:
May. 23, 2023
Hella Gmbh & Co. Kgaa, Lippstadt, DE;
Ana Bizal, Domzale, SI;
Juergen Griebel, Steinen, DE;
Robin Hofner, Heilbronn, DE;
Christian Nutto, Wembach, DE;
Heiko Schoene, Zell im Wiesental, DE;
Hella GmbH & Co. KGaA, Lippstadt, DE;
Abstract
A method for producing a lighting device and a lighting device, comprising a flat light guide extending in a z-direction, wherein the light guide has a thickness, a back side, a front side and circumferential narrow sides, and scattering particles are arranged in its volume. A reflector is arranged at the back of the light guide and at least one light source is optically connected to the light guide for coupling light. Furthermore, the lighting device has a surface coating. In order to provide homogeneous illumination of the interior and a compact lighting device, the surface coating has a light transmission starting from the at least one light source in the z-direction, which increases to the extent that the curve of the light intensity of the at least one light source decreases and the light guide is formed by cohesive back-injection of a carrier foil with the surface coating.