Light emitting diode replacement lamp
First Claim
Patent Images
1. A method of thermal management of an illumination device comprising a light-emitting diode (LED), the method comprising:
- (a) generating a regulated current from a source voltage;
(b) supplying the regulated current to the LED;
(c) generating a sense voltage based on (i) the regulated current and (ii) an LED temperature resulting from heat produced by the LED; and
(d) modifying the regulated current supplied to the LED based on the sense voltage, whereby the LED temperature is maintained within a non-destructive range of LED temperatures,wherein generating the sense voltage comprises flowing at least a portion of the regulated current through a temperature-dependent resistance responsive to the LED temperature resulting from heat produced by the LED.
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Abstract
Thermal management and control techniques for light emitting diode and other incandescent replacement light technologies using a current controller are disclosed.
139 Citations
52 Claims
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1. A method of thermal management of an illumination device comprising a light-emitting diode (LED), the method comprising:
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(a) generating a regulated current from a source voltage; (b) supplying the regulated current to the LED; (c) generating a sense voltage based on (i) the regulated current and (ii) an LED temperature resulting from heat produced by the LED; and (d) modifying the regulated current supplied to the LED based on the sense voltage, whereby the LED temperature is maintained within a non-destructive range of LED temperatures, wherein generating the sense voltage comprises flowing at least a portion of the regulated current through a temperature-dependent resistance responsive to the LED temperature resulting from heat produced by the LED. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of thermal management of an illumination device comprising a light-emitting diode (LED), the method comprising:
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(a) generating a regulated current from a source voltage; (b) supplying the regulated current to the LED; (c) generating a sense voltage based on (i) the regulated current and (ii) an LED temperature resulting from heat produced by the LED; and (d) modifying the regulated current supplied to the LED based on the sense voltage, whereby the LED temperature is maintained within a non-destructive range of LED temperatures, wherein modifying the regulated current comprises decreasing the regulated current when the LED temperature resulting from heat produced by the LED decreases. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A thermal-management system for an illumination device comprising a light-emitting diode (LED), the system comprising:
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means for generating a regulated current from a source voltage; means for supplying the regulated current to the LED; means for generating a sense voltage based on (i) the regulated current and (ii) an LED temperature resulting from heat produced by the LED; means for modifying the regulated current supplied to the LED based on the sense voltage, whereby the LED temperature is maintained within a non-destructive range of LED temperatures; and means for measuring the LED temperature resulting from heat produced by the LED. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A thermal-management system for an illumination device comprising a light-emitting diode (LED), the system comprising:
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means for generating a regulated current from a source voltage; means for supplying the regulated current to the LED; means for generating a sense voltage based on (i) the regulated current and (ii) an LED temperature resulting from heat produced by the LED; and means for modifying the regulated current supplied to the LED based on the sense voltage, whereby the LED temperature is maintained within a non-destructive range of LED temperatures, wherein the means for modifying the regulated current supplied to the LED based on the sense voltage is configured to decrease the regulated current when the LED temperature resulting from heat produced by the LED decreases. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification