Light source driving apparatus

A light source driving apparatus comprising:

• a light source part;
• a constant current driving part connected to the light source part, including a first switching device, and supplying a constant current to the light source part according to a switching operation of the first switching device;
• a driving control part outputting a switching signal for controlling the first switching device consisting the constant current driving part;
• an abnormal state sensing part sensing an abnormal state of the light source part and an abnormal state of the driving control part, and outputting a control signal according to a result of the sensing;
• and
• a protective circuit part selectively operating based on the control signal output from the abnormal state sensing part to stop an operation of the constant current driving part and an operation of the light source part,
• wherein the abnormal state sensing part includes an AND gate for receiving a plurality of state signals corresponding to the light source part and the driving control part and outputting a control signal based on the received plurality of state signals.