Thermal control system for a light-emitting diode fixture
AssigneeMP Design Inc.
InventorsAlexander Kornitz, Mirek Pospisil
Life of this patent
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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.
Claims13
A thermal control system for a light-emitting diode comprising:
- a heat sink;
- a negative temperature coefficient thermistor array thermally coupled to the heat sink;
- a power supply electrically connected to the thermistor array;
- and
- a cooling device electrically connected in series with the power supply and the thermistor array, wherein current used to power the cooling device flows from the power supply and through the thermistor array to the cooling device, and the thermistor array controls said current flow from the power supply to the cooling device based on a temperature of the heat sink which is thermally coupled to the thermistor array, thereby controlling the output of the cooling device based on the temperature of the heat sink.
A light-emitting diode fixture provided with a thermal control system, the fixture comprising:
- a light-emitting diode;
- a heat sink thermally coupled to the light-emitting diode;
- a negative temperature coefficient thermistor array thermally coupled to the heat sink;
- a power supply electrically connected to the light-emitting diode and the thermistor array;
- and
- a cooling device electrically connected in series with the power supply and the thermistor array, wherein current used to power the cooling device flows from the power supply and through the thermistor array to the cooling device, and the thermistor array controls said current flow from the power supply to the cooling device based on a temperature of the heat sink which is thermally coupled to the thermistor array, thereby controlling the output of the cooling device based on the temperature of the heat sink.
A light-emitting diode fixture provided with a thermal control system, the fixture comprising:
- a light-emitting diode;
- a heat sink thermally coupled to the light-emitting diode;
- a negative temperature coefficient thermistor array thermally coupled to the heat sink;
- a cooling device electrically connected to the thermistor array;
- a single DC power supply electrically connected to the both the light-emitting diode and the thermistor array, a positive terminal of the power supply being electrically connected to a positive terminal of the light-emitting diode and the positive terminal of the power supply being electrically connected to an input terminal of the thermistor array;
- and
- wherein an output terminal of the thermistor array is connected to a positive terminal of the cooling device through a rheostat, and a negative terminal of the power supply is connected both to a negative terminal of the light-emitting diode and a negative terminal of the cooling device.
Dependencies are inferred from the claim text.