Light emitting diode replacement lamp
First Claim
Patent Images
1. An illumination device comprising:
- a substrate;
one or more light-emitting diodes (LEDs) disposed on the substrate;
a heat sink thermally connected to the one or more LEDs;
thermal-management circuitry (i) disposed on the substrate, (ii) electrically connected to the one or more LEDs, and (iii) configured to control current to the one or more LEDs based on an LED temperature resulting from heat produced by the one or more LEDs, the thermal management circuitry comprising;
a temperature-dependent resistance;
a resistor connected in parallel with the temperature-dependent resistance;
a source voltage input for receiving a source voltage,wherein the sense voltage is generated at least in part by at least a portion of a regulated current flowing through the resistor and the temperature-dependent resistance.
11 Assignments
0 Petitions
Accused Products
Abstract
Thermal management and control techniques for light emitting diode and other incandescent replacement light technologies using a current controller are disclosed.
143 Citations
24 Claims
-
1. An illumination device comprising:
-
a substrate; one or more light-emitting diodes (LEDs) disposed on the substrate; a heat sink thermally connected to the one or more LEDs; thermal-management circuitry (i) disposed on the substrate, (ii) electrically connected to the one or more LEDs, and (iii) configured to control current to the one or more LEDs based on an LED temperature resulting from heat produced by the one or more LEDs, the thermal management circuitry comprising; a temperature-dependent resistance; a resistor connected in parallel with the temperature-dependent resistance; a source voltage input for receiving a source voltage, wherein the sense voltage is generated at least in part by at least a portion of a regulated current flowing through the resistor and the temperature-dependent resistance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An illumination device comprising:
-
a substrate; one or more light-emitting diodes (LEDs) disposed on the substrate;
a heat sink thermally connected to the one or more LEDs;a temperature-dependent resistance; a resistor connected in parallel with the temperature-dependent resistance; thermal-management circuitry electrically connected to the one or more LEDs, and configured to control current to the one or more LEDs based on an LED temperature resulting from heat produced by the one or more LEDs, the thermal-management circuitry comprising; a sense voltage generator for generating a sense voltage, wherein the sense voltage generator comprises an amplifier for amplifying the sense voltage. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. An illumination device comprising:
-
a substrate; one or more light-emitting diodes (LEDs) disposed on the substrate; a heat sink thermally connected to the one or more LEDs; and thermal-management circuitry electrically connected to the one or more LEDs, and configured to control current to the one or more LEDs based on an LED temperature resulting from heat produced by the one or more LEDs, the thermal management circuitry comprising; a sense voltage generator for generating a sense voltage based at least in part on a regulated current and a temperature-dependent resistance indicative of the LED temperature, whereby the sense voltage is utilized to maintain the regulated current within a non-destructive operating range of the one or more LEDs.
-
Specification