Temperature indication apparatus

An indication apparatus for indicating temperature status of a heat dissipating portion on a motherboard, comprising:

• a detection module capable of detecting temperatures of the heat dissipating portion, and converting the detected temperatures to voltage signals;
• the detection module comprises a thermal resistor and a first resistor;
• a first terminal of the thermal resistor is capable of receiving a first voltage;
• a second terminal of the thermal resistor is grounded via the first resistor;
• a comparison module capable of receiving the voltage signals, comparing the voltage signals with a first reference voltage, and outputting control signals according to a comparison result;
• the comparison module comprises a first comparator;
• a non-inverting input terminal of the first comparator is capable of receiving the first reference voltage;
• an inverting input terminal of the first comparator is electrically coupled to a connection point between the thermal resistor and the first resistor;
• a switch module capable of receiving the control signals, and turning on or off according to the control signals;
• the switch module comprises a first transistor, a second transistor, and a third transistor;
• each bases of the first transistor and the second transistor is electrically coupled to an output terminal of the first comparator;
• each of an emitter of the first transistor and a collector of the second transistor is capable of receiving the first voltage;
• an emitter of the second transistor is grounded;
• the collector of the second transistor is electrically coupled to a base of the third transistor;
• an emitter of the third transistor is capable of receiving the first voltage;
• and
• an indication module capable of indicating temperature states of the heat dissipating portion when the switch module turns on or off.