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. 23, 2024
Filed:
Nov. 16, 2020
Signify Holding B.v., Eindhoven, NL;
Johannes Petrus Maria Ansems, Hulsel, NL;
Michel Cornelis Josephus Marie Vissenberg, Roermond, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
It is an object of the invention to provide an improved LED filament lamp (), the LED filament lamp () comprising: a transparent envelope () provided with a transparent optical structure (); at least one LED filament () enclosed by the transparent envelope (); wherein the transparent optical structure () comprises a plurality of individually spaced prismatic grooves () and/or ridges that are at least partly aligned along a projection of the at least one LED filament () on the transparent envelope (); wherein each prismatic groove () and/or ridge of the plurality of individually spaced prismatic grooves () and/or ridges comprises a refractive facet () oriented at a wedge angle () between 5 and 50 degrees with a tangent of the envelope () at the location of the respective prismatic groove () and/or ridge.