GAS DISCHARGE LAMP DRIVER CIRCUIT WITH LAMP SELECTION PART

A gas discharge lamp driver circuit, comprising an inverter (10) of a bridge type, which has first and second input terminals connected to DC power lines (6, 8) for receiving a DC power voltage and output terminals (18) for providing a substantial rectangular power voltage, a ballast (20), which is...

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Bibliographische Detailangaben
Hauptverfasser:	BUIJ ARNOLD WILLEM, MELAI HENRI ARNOUD IGNATIUS
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY
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Beschreibung
Zusammenfassung:	A gas discharge lamp driver circuit, comprising an inverter (10) of a bridge type, which has first and second input terminals connected to DC power lines (6, 8) for receiving a DC power voltage and output terminals (18) for providing a substantial rectangular power voltage, a ballast (20), which is connected to the output terminals of the inverter and to one or more lamp circuits (30), each having a gas discharge lamp (32) connected in series with a current control circuit having a high frequency semiconductor switch element (34), which receives an individual selection signal (S1, S2) from a selection circuit (36), such that an individual lamp (32) can be selected to operate. If deselected, the switch element conducts such that current is diverted to a selected switch element to thereby only ignite and operate a lamp connected to a selected switch element.