Combined transformer and multi-lamp driving circuit

A multi-lamp driving circuit, used for receiving a high-voltage signal to supply a lamp apparatus, the multi-lamp driving circuit comprising:

• a first core, the first core having a first side pillar, a first middle pillar, and a second side pillar, wherein the first middle pillar, the first side pillar, and the second pillar are connected;
• a second core, the second core having a second middle pillar butting to the first middle pillar, a third side pillar butting to the first side pillar, and a fourth side pillar butting to the second side pillar, wherein the second middle pillar, the third side pillar, and the fourth side pillar are connected;
• a first primary coil, wound on the first side pillar of the first core;
• a first secondary coil, wound on the third side pillar of the second core, and the first secondary coil corresponding to the first primary coil;
• a second primary coil, wound on the second side pillar of the first core;
• and
• a second secondary coil, wound on the fourth side pillar of the second coil, and the second secondary coil corresponding to the second primary coil;
• wherein the mutually butted first side pillar and third side pillar and the mutually butted first middle pillar and second middle pillar form a first magnetic path;
• the mutually butted second side pillar and fourth side pillar and the mutually butted first middle pillar and second middle pillar form a second magnetic path;
• the first primary coil, the first secondary coil, and the first magnetic path form a first transformer;
• the second primary coil, the second secondary coil, and the second magnetic path form a second transformer;
• the first primary coil and the second primary coil form a series loop;
• one end of the first secondary coil and one end of the second secondary coil receive the high-voltage signal respectively;
• and the other end of the first secondary coil and the other end of the second secondary coil couple to the lamp apparatus respectively.