Fluorescent lamp lighting device

Details Fluorescent lamp lighting device Fluorescent lamp lighting device

H - Electricity

05

B

H05B 41/14 (2006.01) H05B 41/04 (2006.01) H05B 41/18 (2006.01)

Patent

CA 2211054

The present invention provides for a starting switch circuit which is generally applicable to ballasts and fluorescent lamps having different normal rated power from each other. A starting switch circuit comprising: a serially-connected circuit having first rectifying means, a semiconductor switching element including a control terminal, and first resistor means for detecting a current flowing to the semiconductor switching element, all connected in series; first timer means, connected in parallel to a series circuit of the semiconductor switching element and the first resistor means, for making the semiconductor switching element to OFF state after the semiconductor switching element is in ON state for a predetermined period of time; and control means for controlling the semiconductor switching element.

Circuit de commutateur de démarrage conçu généralement pour des ballasts et des lampes fluorescentes dont les puissances nominales normales diffèrent. Le circuit comprend : un circuit monté en série ayant un premier moyen de redressage, un élément de commutation à semiconducteurs comprenant une borne de commande, et un premier moyen de résistance pour détecter un courant alimentant ledit élément de commutation à semiconducteurs, tous montés en série; un premier moyen de temporisation, monté en parallèle sur le circuit série de l'élément de commutation à semiconducteurs et du premier moyen de résistance, afin de bloquer ledit élément de commutation à semiconducteurs après que celui-ci ait été débloqué pendant une période prédéterminée; et un moyen de commande pour commander l'élément de commutation à semiconducteurs.

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