Patent ID: 8729818

Claim:
A driving circuit structure for driving at least two parallel light-emitting loads, the driving circuit structure comprising: a power supply device for supplying an alternating current power supply, the power supply device comprising: a resonance impedance unit, the resonance impedance unit being used for blocking feedback noise induced when an output load of the driving circuit structure is varied, the resonance impedance unit and comprising a capacitor and an inductor; a transformer; a resonance transforming module for generating a resonance pulse signal to a primary side of the transformer, so as to form the alternating current power supply on a secondary side of the transformer; and a switch unit, wherein an output of the switch unit is coupled to the primary side of the transformer, and the switch unit selectively transmits an input voltage from the switch unit to the primary side of the transformer according to a switching frequency, the resonance impedance unit is coupled between the switch unit and the transformer, and a natural resonance frequency of the resonance impedance unit is approximately equaled to the switching frequency; a signal processing device for transforming the alternating current power supply into direct current power supplies for driving the at least two parallel light-emitting loads; and an impedance balancing device comprising a plurality of balancing units, wherein the balancing units are for balancing an alternating current magnitude of the alternating current supply, so as to stabilize direct current magnitudes of the direct current power supplies used for driving the light-emitting loads, wherein each of the balancing units is coupled between the secondary side of the transformer and the signal processing device.