Patent ID: 7667412
Filing Date: 2010-02-23
Classification: H05B,Y02B

Abstract:
1. A driving device for driving a light source module comprising a plurality of light sources, the driving device comprising: an inverter circuit for converting a received signal to a signal driving the light sources; a feedback and filter circuit for feeding back current flowing through the light sources and filtering radio frequency interference (RFI) signals of feedback current, the feedback and filter circuit comprising at least one filter for filtering the RFI signals of the feedback current, and a resistor for feeding back the current flowing through the light sources, the at least one filter comprising an impedance comprising a first terminal designated as an input of the at least one filter and a second terminal, and a capacitor comprising a third terminal designated as an output of the at least one filter and a fourth terminal electrically connected to ground; and a controller electrically connected between the feedback and filter circuit and the inverter circuit; wherein the feedback and filter circuit further comprises a rectifier circuit electrically connected between the second terminal of the impedance and the capacitor, the rectifier circuit for converting an AC signal flowing through the light sources to a ripple signal.