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:
Jun. 13, 2023
Filed:
Apr. 23, 2020
Signify Holding B.v., Eindhoven, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
There is provided a light emitting diode, LED, filament lamp () which has a longitudinal axis (LA) and provides LED filament lamp light (). The LED filament lamp () comprises a LED filament () which comprises a light transmissive, elongated substrate (). Said substrate () has a first main surface () at a first side () and a second main surface () at a second side (') opposite to the first side (′). A plurality of LEDs () is mounted only onto said first main surface () and configured to emit LED light (). An encapsulant () covers the plurality of LEDs () and at least part of said first main surface (). The LED filament () by a specific distribution of beam modifying material () comprises at least a luminescent material () provided in the encapsulant, and is configured to emit first LED filament light () in a first main direction (D) away from the first main surface () and having a first color point x1,y1, and to emit second LED filament light () in a second main direction (D) away from the second main surface () having a second color point x2,y2. The first main direction (D) is opposite to the second main direction (D), and, wherein (i) |x1-x2|≥0.05 and/or (ii) |y1-y2|≥0.05 applies.