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:
Sep. 22, 2020
Filed:
Dec. 11, 2017
Signify Holding B.v., Eindhoven, NL;
SIGNIFY HOLDING B.V., Eindhoven, NL;
Abstract
A retrofit LED tube for connection to an electronic ballast, said retrofit LED tube comprising an LED array for emitting light, an alternating current, AC, LED driver arranged for receiving an AC supply voltage and for driving said LED array based on said received AC supply voltage, a filament circuit for supporting a filament current circulating back to said electronic ballast for enabling lamp recognition by said electronic ballast during a lamp recognition phase, and a lamp current to said AC LED driver for driving said LED array during a steady-state phase, and comprising a filament enhancement circuit arranged to reduce at least one of said filament current and said lamp current flowing through said filament circuit, during said steady-state phase.