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:
May. 25, 2021
Filed:
Apr. 30, 2018
Signify Holding B.v., Eindhoven, NL;
Ties Van Bommel, Horst, NL;
Rifat Ata Mustafa Hikmet, Eindhoven, NL;
Alexander Henricus Waltherus Van Eeuwijk, Eindhoven, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
A lighting device () for use in a luminaire () comprising: —a base () having a longitudinal axis (LA) and comprising an electrical connector () for connecting the lighting device () to a luminaire socket () of the luminaire (), —at least one LED-filament () comprising a substrate () having an elongated body and a plurality of light sources () mechanically coupled to the substrate (), the plurality of light sources () configured for emitting light () in a first spatial light distribution, —at least one light guide () having an elongated body, comprising at least one light in-coupling portion () at at least on the external periphery of the at least one light guide () for coupling light () into the at least one light guide (), a plurality of light out-coupling portions () for coupling light () out of the at least one light guide () in a second spatial light distribution, —an at least in part light-transmissive envelope () at least partly encapsulating said at least one LED-filament () and said at least one light guide (), —wherein the at least one light guide () is arranged for guiding the light () coupled into the at least one light guide () at the at least one light in-coupling portion () via total internal reflection () to the plurality of light out-coupling portions (), —wherein the at least one LED-filament () is external to the at least one light guide ().