Abstract: A light-emitting diode fixture comprises spaced-apart first and second housing portions. There is a cooling device disposed within the first housing portion. The cooling device is in fluid communication with the second housing portion. First and second printed circuit boards are disposed within the second housing portion. A light-emitting diode and a negative coefficient thermistor array are mounted on the first printed circuit board. The light-emitting diode and the negative coefficient thermistor array are each thermally coupled to a heat sink. A rectifier is mounted on the second printed circuit board. The rectifier is electrically connected in series with the negative coefficient thermistor array and the cooling device. Current used to power the cooling device flows from the rectifier through the negative coefficient thermistor array to the cooling device.

Abstract: A thermal control circuit comprises a positive temperature coefficient thermistor array, a negative temperature coefficient thermistor array, and a resistor array. The positive temperature coefficient thermistor array and the resistor array are electrically connected in parallel to a first terminal of the thermal control circuitry. The negative temperature coefficient thermistor array is electrically connected to a second terminal of the thermal control circuit. The positive temperature coefficient thermistor array, a 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.

Abstract: A thermal control circuit comprises a positive temperature coefficient thermistor array, a negative temperature coefficient thermistor array, and a resistor array. The positive temperature coefficient thermistor array and the resistor array are electrically connected in parallel to a first terminal of the thermal control circuitry. The negative temperature coefficient thermistor array is electrically connected to a second terminal of the thermal control circuit. The positive temperature coefficient thermistor array, a 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.

Abstract: A light-emitting diode fixture comprises spaced-apart first and second housing portions. There is a cooling device disposed within the first housing portion. The cooling device is in fluid communication with the second housing portion. First and second printed circuit boards are disposed within the second housing portion. A light-emitting diode and a negative coefficient thermistor array are mounted on the first printed circuit board. The light-emitting diode and the negative coefficient thermistor array are each thermally coupled to a heat sink. A rectifier is mounted on the second printed circuit board. The rectifier is electrically connected in series with the negative coefficient thermistor array and the cooling device. Current used to power the cooling device flows from the rectifier through the negative coefficient thermistor array to the cooling device.

Abstract: A thermal control system for an electronic device comprises a negative temperature coefficient thermistor array thermally coupled to a heat sink. The negative temperature coefficient thermistor array may be disposed within a thermal conductive member. A power supply is electrically connected to the negative temperature coefficient thermistor array. A cooling device is electrically connected in series with the power supply and the negative temperature coefficient thermistor array. The negative temperature coefficient thermistor array is between the power supply and the cooling device.

Abstract: A thermal control system for a light-emitting diode comprises a thermistor array thermally coupled to a heat sink. The thermistor array may be disposed within a thermal conductive member. A power supply is electrically connected to the thermistor array. A cooling device is electrically connected in series with the power supply and the thermistor array. The thermistor array is between the power supply and the cooling device. A rheostat may further be electrically connected, in series, between the thermistor array and the cooling device.

Abstract: A thermal control system for a light-emitting diode comprises a thermistor thermally coupled to a heat sink. Preferably the thermistor is disposed within a thermal conductive member. A power supply is electrically connected to the thermistor. A cooling device is electrically connected in series with the power supply and the thermistor. The thermistor is between the power supply and the thermistor. A rheostat may further be electrically connected, in series, between the thermistor and the power supply.