Apparatus for driving a plurality of lamps

A power system for driving a plurality of lamps, comprising:

• a transformer circuit comprising a plurality of transformers in a quantity denoted by N, each of the transformers having a first secondary winding, having a first output end and a second output end, a second secondary winding, having a third output end and a fourth output end, and a third secondary winding, having a fifth output end and a sixth output end;
• a current balancing circuit comprising a plurality of current balancing units each having two output ends, wherein the number of the current balancing units is twice the quantity N of the transformers, and the (3N)th current balancing unit is connected to a fifth output end of the Nth transformer, the (3N−1)th current balancing unit is connected to a third output end of the Nth transformer, and the (3N−2)th current balancing unit is connected to a first output end of the Nth transformer;
• and
• a light source having a plurality of lamps, each of the lamps having one end connected to a respective output end of the current balancing units and another end grounded, wherein the number of the lamps is six times the quantity N of the transformers.

A system for driving a plurality of lamps comprising:

• a power source of said system;
• a light source comprising a plurality of lamps to be powered by said power source for illumination thereof;
• a transformer circuit comprising a plurality of transformers, each transformer of said plurality of transformers comprising a primary winding extending along an input side of said each transformer, and at least two secondary windings jointly extending along an output side of said each transformer, said primary winding electrically connectable to said power source to accept power from said power source, and said at least two secondary windings used to output said power respectively after transforming of said each transformer;
• a current balancing circuit comprising a plurality of current balancing units each of which corresponds to one of said at least two secondary windings and at least two lamps from said plurality of lamps of said light source, and electrically connects between said at least two lamps and said one of said at least two secondary windings, said each of said plurality of current balancing units used to accept said transformed power from said one of said at least two secondary windings and to transmit said transformed power to said at least two lamps respectively by means of balancing electrical currents through said each of said plurality of current balancing units.