Method and device for remote sensing and control of LED lights
First Claim
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1. A method for determining a temperature of at least one light-emitting diode (LED) in a circuit which includes a power supply for powering the LED, where the LED is operable to generate light, the method comprising:
- providing an operating current and an operating voltage to the LED;
superimposing a current pulse on the operating current;
sensing a magnitude of a voltage pulse across the LED resulting from the applied current pulse superimposed on the operating current; and
determining an operating temperature of the LED at the provided operating current based on a magnitude of the current pulse and the magnitude of the voltage pulse.
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Abstract
A control system is disclosed for determining an actual temperature of a light emitting diode. The control system uses conductor that supply power to the light emitting diode to supply a pulse to the light emitting diode. The pulse is determined along with a reaction caused by the pulse and the information gained is used in determination of the light emitting diode die temperature which can then be used in controlling current to the light emitting diode to control the temperature of the light emitting diode.
213 Citations
23 Claims
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1. A method for determining a temperature of at least one light-emitting diode (LED) in a circuit which includes a power supply for powering the LED, where the LED is operable to generate light, the method comprising:
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providing an operating current and an operating voltage to the LED; superimposing a current pulse on the operating current; sensing a magnitude of a voltage pulse across the LED resulting from the applied current pulse superimposed on the operating current; and determining an operating temperature of the LED at the provided operating current based on a magnitude of the current pulse and the magnitude of the voltage pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification