Thermal control circuit for an active cooling module for a light-emitting diode fixture

An active cooling module for a light-emitting diode, the active cooling module comprising:

• a cooling device electrically connected to a power supply;
• and
• a thermal control circuit electrically connected to the power supply, the thermal control circuit including:
• a positive temperature coefficient thermistor array;
• a negative temperature coefficient thermistor array;
• and
• a resistor array, wherein the positive temperature coefficient thermistor array and the resistor array are electrically connected in parallel to a first terminal of the thermal control circuit;
• the negative temperature coefficient thermistor array is electrically connected to a second terminal of the thermal control circuit;
• and the positive temperature coefficient thermistor array, the negative temperature coefficient thermistor array and the resistor array are all connected by a negative bus to a third terminal of the thermal control circuit;
• wherein a negative terminal of the light-emitting diode is electrically connected the first terminal of the thermal control circuit, a negative terminal of the cooling device is electrically connected to the second terminal of the thermal control circuit, and a negative terminal of the power supply is electrically connected to the third terminal of the thermal control circuit.

An electronic device provided with an active cooling module, the electrical device comprising:

• a power supply;
• a light-emitting diode electrically connected to the power supply;
• a cooling device electrically connected to the power supply;
• and
• a thermal control circuit electrically connected to the power supply, the thermal control circuit including:
• a positive temperature coefficient thermistor array;
• a negative temperature coefficient thermistor array;
• and
• a resistor array, wherein the positive temperature coefficient thermistor array and the resistor array are electrically connected in parallel to a first terminal of the thermal control circuit;
• the negative temperature coefficient thermistor array is electrically connected to a second terminal of the thermal control circuit;
• and the positive temperature coefficient thermistor array, the negative temperature coefficient thermistor array and the resistor array are all connected by a negative bus to a third terminal of the thermal control circuit;
• wherein a negative terminal of the light-emitting diode is electrically connected the first terminal of the thermal control circuit, a negative terminal of the cooling device is electrically connected to the second terminal of the thermal control circuit, and a negative terminal of the power supply is electrically connected to the third terminal of the thermal control circuit.