Patent ID: 6617807
Filing Date: 2003-09-09
Classification: H05B,Y02B

Abstract:
A discharge-lamp lighting circuit for turning on a plurality of discharge lamps, comprising:starting circuits for supplying starting pulses to the respective discharge lamps, said starting circuit including: a plurality of transformers equal in number to the discharge lamps, each of the transformers having a primary and a secondary winding connected to the respective discharge lamps; and a circuit provided on the primary side of the transformer, including a plurality of capacitors having a first end and second end, each first end being connected to a terminal of the primary winding of corresponding transformer, and the second end being connected to a pole of a single switch element, wherein, when the accumulated charge in each capacitor is discharged via the primary winding of the transformer as the switch element conducts, the starting pulse is generated and supplied to the discharge lamp via the secondary winding of the transformer.