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:
Nov. 17, 2020
Filed:
Feb. 07, 2020
Osram Oled Gmbh, Regensburg, DE;
OSRAM OLED GmbH, Regensburg, DE;
Abstract
A filament includes a radiation-transmissive substrate, a plurality of LEDs, and a converter layer, wherein the substrate has an upper side and a lower side facing away from the upper side, the LEDs being arranged on the upper side of the substrate, the converter layer covers the LEDs, the upper side and the lower side of the substrate, and the converter layer has a first sublayer on the upper side and a second sublayer on the lower side, the converter layer is configured to obtain an improved radiation profile of the filament, along a lateral direction, the converter layer has a continuously varying vertical layer thickness, the lateral direction is a lateral longitudinal direction parallel to a main extension surface of the substrate, and the substrate has a length expanding along the lateral longitudinal direction that is greater than a width of the substrate along a lateral transverse direction.