RETROFIT LED LIGHTING DEVICE HAVING IMPROVED TIMING EVENT DETECTION FOR INCREASING STABLE DRIVER OPERATION WITHOUT LIGHT FLICKER

A retrofit Light Emitting Diode, LED, lighting device for connection to a ballast, wherein said ballast is arranged to provide for a ballast current, said retrofit LED lighting device comprising at least one LED for emitting light, a rectifier arranged for rectifying said ballast current and for pro...

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Bibliographic Details
Main Authors MALYNA, DMYTRO VIKTOROVYCH, DE JONGH, FRITS TOBI, TAO, HAIMIN
Format Patent
LanguageEnglish
Published 06.05.2021
Subjects
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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Summary:A retrofit Light Emitting Diode, LED, lighting device for connection to a ballast, wherein said ballast is arranged to provide for a ballast current, said retrofit LED lighting device comprising at least one LED for emitting light, a rectifier arranged for rectifying said ballast current and for providing a lamp current to said at least one LED, a shunt switch for shunting said at least one LED thereby preventing said lamp current to flow through said at least one LED, a control unit for controlling said shunt switch, wherein said control unit is arranged to detect a particular amplitude offset current level in one of said ballast current and said lamp current, said particular amplitude offset current level being a particular non-zero value of said ballast current or said lamp current and to activate said shunt switch triggered by said detection.
Bibliography:Application Number: US201816640094