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:
Dec. 14, 2017
Signify Holding B.v., Eindhoven, NL;
Anteneh Alemu Abbo, Eindhoven, NL;
Haimin Tao, Eindhoven, NL;
Bernd Ackermann, Aachen, DE;
Kumar Arulandu, Breda, NL;
Wai Pang Chow, Eindhoven, NL;
Pieter Johannes Stobbelaar, Eindhoven, NL;
Ger Van Hees, Vosselaar, BE;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
A retrofit Light Emitting Diode, LED, tube for replacing a fluorescent tube, wherein said retrofit LED tube is arranged to be connected to a ballast, said retrofit LED tube comprising a ballast determining unit arranged for identifying a type of ballast connected to said retrofit LED tube by controlling an output voltage of said power rectifier to a first voltage and measuring a first current provided by said power rectifier, controlling said output voltage of said power rectifier to a second voltage and measuring a second current provided by said power rectifier, wherein said second voltage differs from said first voltage and determining said type of ballast based on said first and second output voltages and said measured first and second currents, wherein said ballast determining unit is further arranged to configure said configurable matching circuit based on said determined type of ballast.