Light source drive system and failure reporting method thereof

A light source drive system, comprising:

• a control circuit;
• and
• a drive circuit module having a first light source driving circuit and a second light source driving circuit, wherein the first light source driving circuit and the second light source driving circuit are connected to the control circuit via a fault transmission line, so as to enable the control circuit to acquire a transmission content of the fault transmission line;
• wherein the first light source driving circuit and the second light source driving circuit respectively comprise a fault arbitration circuit, which includes:
• a detection circuit configured to detect a first level time during which the fault transmission line remains at a first level;
• a fault reporting circuit, configured to output a corresponding fault message based on a fault condition;
• a switch connected to the fault transmission line, wherein the switch controls the fault transmission line to be at the first level when the switch is on and controls the fault transmission line to be at a second level when the switch is off;
• and
• a fault control circuit configured to initiate a counting duty cycle when the fault condition occurs, wherein the duty cycle includes a detection time and a delay time, the fault control circuit controls the switch to be on during the detection time and off during the delay time, and controls the detection circuit to detect the first level during the duty cycle;
• wherein the fault control circuit outputs the detection time of different durations corresponding to different types of fault conditions, and determines a control authority of the fault transmission line based on the first level time and the detection time.

A failure reporting method of a light source drive system, comprising:

• when a fault condition occurs in a first light source driving circuit or a second light source driving circuit, initiating a duty cycle in fault arbitration circuits of the first light source driving circuit and the second light source driving circuit, respectively, wherein the first light source driving circuit and the second light source driving circuit are connected to a control circuit through a fault transmission line, so as to enable the control circuit to acquire a transmission content of the fault transmission line, wherein the duty cycle comprises a detection time and a delay time;
• controlling a switch in a fault control circuit of the fault arbitration circuit to be on during the detection time and off during the delay time, wherein the switch controls the fault transmission line to be at a first level when on and controls the fault transmission line to be at a second level when off, and controlling a detection circuit to detect a first level time during which the fault transmission line is maintained at the first level within the duty cycle;
• and
• outputting different detection times of varying durations according to types of fault conditions, wherein the fault control circuit determines a control authority of the fault transmission line based on the first level time and the detection time.