LED Luminaire

• US 20160234900A1
• Filed: 02/10/2015
• Published: 08/11/2016
• Est. Priority Date: 02/10/2015
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Sobieski, John, Bendtsen, Andrew Dan, Wilcox, Kurt S.
• Granted Patent: US 9,788,378 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: H05B 45/375 using buck topology
• CPC Class Codes: H05B 45/38 using boost topology
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

According to one aspect, an LED operating network comprises a first circuit board made of a fiberglass reinforced epoxy laminate having power connection terminals that receive AC power, a rectification element, and at least one of a surge protection element and a fuse element. A second circuit board is made of a heat-dissipative material that receives rectified AC electrical power comprising a plurality of cycles from the first circuit board and having a plurality of LED dies and at least one LED driver circuit. The LEDs are turned on at different points during each of the plurality of cycles.

Claims

1. An LED luminaire, comprising:

a first circuit board made of a fiberglass reinforced epoxy laminate having power connection terminals that receive AC power, a rectification element, and at least one of a surge protection element and a fuse element; and

a second circuit board made of a heat-dissipative material that receives rectified AC electrical power comprising a plurality of cycles from the first circuit board and having a plurality of LED dies and at least one LED driver circuit;

wherein the LEDs are turned on at different points during each of the plurality of cycles.

2. The LED luminaire of claim 1, wherein the first circuit board is made of FR-4 material.

3. The LED luminaire of claim 1, wherein the second circuit board is made of at least one of a ceramic, aluminum, alumina, a composition including aluminum, and combinations thereof.

4. The LED luminaire of claim 1, wherein the second circuit board comprises multiple layers of material, wherein at least one layer is a ceramic or a dielectric base layer.

5. The LED luminaire of claim 1, wherein the second circuit board comprises a one of a PCB, an MCPCB, a laminate structure having one or more layers connected via adhesive, a flexible printed circuit board, and one or more adhesive layers

6. The LED luminaire of claim 1, wherein the second circuit board comprises a ceramic base having at least one layer adhered thereon.

7. The LED luminaire of claim 6, wherein the at least one layer is flexible.

8. The LED luminaire of claim 1, wherein the LED luminaire is disposed outdoors.

9. An adapter circuit, comprising:

at least two input terminals for receiving an electrical input and at least two output terminals and at least one electrical component coupled to at least one of the input terminals and at least one of the output terminals;

wherein the at least one electrical component is selectively disconnectable from at least one of the at least two input terminals and at least one of the at least two output terminals to provide a selected first output to the at least two output terminals when a first electrical input is supplied to the at least two input terminals and wherein a selected second output is provided to the at least two output terminals when a second electrical input is supplied to the at least two input terminals and the at least one electrical component is connected to the at least one of the at least two input terminals and the at least one of the at least two output terminals.

10. The adapter circuit of claim 9, wherein the electrical component comprises a jumper.

11. The adapter circuit of claim 10, wherein the adapter circuit interconnects a rectification circuit and an LED driver circuit.

12. The adapter circuit of claim 9, wherein the electrical input comprises rectified AC power provided to first and second input terminals and at least first and second LED driver circuits are coupled to first, second, third, and fourth output terminals.

13. The adapter circuit of claim 12, wherein the at least one electrical component comprises first, second, and third jumpers selectively coupled across the first through fourth output terminals wherein the adapter circuit connects the first and second driver circuits in parallel when the first and third jumpers are connected to the output terminals and the second jumper is disconnected from the output terminals and wherein the adapter circuit connects the first and second driver circuits in series when the first and third jumpers are disconnected from the output terminals and the second jumper is connected to the output terminals.

14. The adapter circuit of claim 9, wherein the adapter circuit is disposed in a streetlight.

15. A method of developing a desired magnitude of electrical power, the method comprising the steps of:

providing an adapter circuit including at least two input terminals for receiving an electrical input and at least two output terminals and at least one electrical component coupled to at least one of the input terminals and at least one of the output terminals;

determining a magnitude of an electrical input power parameter to be supplied to the input terminals;

selectively removing the at least one electrical component from the adapter circuit in dependence upon the determined magnitude; and

coupling the output terminals of the adapter circuit to a utilization circuit.

16. The method of claim 15, wherein the at least one electrical component comprises a jumper.

17. The method of claim 16, wherein the adapter circuit interconnects a rectification circuit and an LED driver circuit.

18. The method of claim 17, wherein the electrical input comprises rectified AC power provided to first and second input terminals and wherein the step of coupling comprises the step of connecting at least first and second LED driver circuits to first, second, third, and fourth output terminals.

19. The method of claim 18, wherein the at least one electrical component comprises first, second, and third jumpers selectively coupled across the first through fourth output terminals wherein the adapter circuit connects the first and second driver circuits in parallel when the first and third jumpers are connected to the output terminals and the second jumper is disconnected from the output terminals and wherein the adapter circuit connects the first and second driver circuits in series when the first and third jumpers are disconnected from the output terminals and the second jumper is connected to the output terminals.

20. An outdoor luminaire, comprising:

a housing adapted to be mounted on an outdoor structure;

an input disposed in the housing that receives AC power, at least one rectification element coupled to the input and which produces rectified AC electrical power comprising a plurality of cycles;

at least one LED driver circuit coupled to the at least one rectification element; and

a plurality of LEDs coupled to the at least one LED driver circuit;

wherein the LEDs are turned on at different points during each of the plurality of cycles and together develop an output level of at least about 2000 lumens.

21. The outdoor luminaire of claim 20, wherein the at least one LED driver circuit comprises first and second driver circuits.

22. The outdoor luminaire of claim 21, wherein the first and second driver circuits are coupled together in series.

23. The outdoor luminaire of claim 20, wherein the at least one LED driver circuit comprises first, second, and third driver circuits.

24. The outdoor luminaire of claim 23, wherein the first, second, and third driver circuits are coupled together in parallel.

25. The outdoor luminaire of claim 23, wherein the at least one LED driver circuit comprises at least two driver circuits connected together in series or parallel.

26. The outdoor luminaire of claim 25, wherein an adapter circuit interconnects the at least two driver circuits.

27. The outdoor luminaire of claim 25, wherein the adapter circuit comprises a plurality of jumpers.

28. The outdoor luminaire of claim 20, wherein the LED luminaire is used in an outdoor application.

29. The outdoor luminaire of claim 27, wherein the luminaire comprises one of a streetlight, a parking structure light, a parking lot light, and an outdoor rural luminaire.