Patent ID: 7786677

Claim:
A control circuit for turning on/off automobile lights, being coupled between a first power output unit, a second power output unit, a third power output unit and a plurality of automobile lights, and comprising: a voltage regulation circuit, coupled to the second power output unit, for receiving a second power source of the second power output unit; an input trigger circuit, coupled to the third power output unit, such that when the input trigger circuit is conducted, a third power source of the third power output unit triggers the input trigger circuit to generate and output a first trigger signal; a stable-state circuit, coupled to the voltage regulation circuit and the input trigger circuit respectively, for being triggered by the first trigger signal to generate and output a second trigger signal; a driving circuit, coupled to the stable-state circuit, for being triggered by the second trigger signal to generate and output a third trigger signal; and an output circuit, coupled between the driving circuit, the first power output unit and the automobile lights, such that when the output circuit is triggered by the third trigger signal into a conductive state, a first power source of the first power output unit is outputted to the automobile lights through the output circuit, and when the second power source is interrupted, the output circuit interrupts the first power source outputted to the automobile lights.