Patent ID: 7271549
Filing Date: 2007-09-18
Classification: H05B

Abstract:
1. A method for driving N pairs of lamps connected to a driving circuit for receiving electrical currents therefrom, each pair of lamps having a first lamp and a second lamp, the driving circuit comprising M transformers, each transformer having a first coil and a second coil magnetically coupled to each other, each coil having an input end and an output end interconnected by a capacitor, said M transformers including N transformers, each of the N transformers operatively connected to a corresponding one of said N pairs of lamps, said method comprising the steps of: for each of said M transformers, operatively connecting the input end of the first coil to the input end of the second coil in order to receive an input current for providing a first output current through the output end of the first coil and a second output current through the output end of the second coil, wherein the output end of the first coil and the output end of the second coil are effectively isolated from each other so as to prevent an exchange of current therebetween, and for each of said N transformers, operatively connecting the output end of the first coil to the first lamp of the corresponding pair so as to provide the first output current to the first lamp; and operatively connecting the output end of the second coil to the second lamp of the corresponding pair so as to provide the second output current to the second lamp, wherein N and M are positive integers.