LED LIGHTING SYSTEM

• US 20140246986A1
• Filed: 03/03/2014
• Published: 09/04/2014
• Est. Priority Date: 03/03/2013
• Status: Active Grant

• Current Assignee: Amerlux, LLC (Delta Electronics Incorporated)
• Original Assignee: Amerlux, LLC (Delta Electronics Incorporated)
• Inventors: LESHNIAK, Itai
• Granted Patent: US 9,795,011 B2
• Time in Patent Office: Days
• US Class Current: 315/201
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: H05B 47/175 by remote control
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A DC-powered LED lighting device and a lighting system using such devices are disclosed. A common AC/DC power supply is coupled to at least one electric main and provides power to the LED lighting devices at DC voltages that are higher than the peak voltage of the sine wave of the at least one electric main.

Claims

1. A light emitting diode (LED) lighting device, comprising:

a DC/DC converter adapted to convert electrical power at a first DC voltage V1 into electrical power at a second DC voltage V2;

a LED driving circuit operably coupled to the DC/DC converter that is powered using electrical power from the DC/DC converter at the second DC voltage V2; and

at least one LED assembly operably coupled to the LED driving circuit that is powered by the LED driving circuit.

2. The device of claim 1, wherein the DC voltage V1 is higher than the DC voltage V2.

3. The device of claim 1, wherein the DC voltage V1 is selected in a range from about 100 to about 600 VDC.

4. The device of claim 1, wherein the DC voltage V1 is between about 350-400 VDC and the DC voltage V2 is between about 12-90 VDC.

5. The device of claim 1, wherein the DC voltage V1 is equal to or lower than the DC voltage V2.

6. The device of claim 1, further comprising a terminal coupling the DC/DC converter to a DC circuit including wiring that provides electric power to the device at the DC voltage V1.

7. The device of claim 1, wherein the least one LED assembly includes at least one LED.

8. The device of claim 1, wherein the at least one LED assembly includes at least one network of LEDs.

9. The device of claim 1, further comprising optical, electrical, or mechanical devices enhancing or controlling optical properties or power consumption of the device.

10. The device of claim 1, further comprising a control module configured to control the device using wired or wireless data transmission techniques.

11. A lighting system, comprising:

an AC/DC power supply configured to be coupled to at least one AC electric main, the AC/DC power supply being configured to convert AC input power into output power at a first stepped up DC voltage V1, wherein the DC voltage V1 is higher than the peak voltage of the sine wave of the at least one electric main; and

at least one lighting device electrically coupled to the power supply, the at least one lighting device having (i) a DC/DC converter configured to convert power at the first DC voltage V1 into power at a second, lower DC voltage V2, (ii) a LED driving circuit powered using the DC voltage V2, and (iii) at least one LED assembly powered by the LED driving circuit.

12. The system of claim 11, wherein the DC voltage V1 is selected in a range from about 100 to about 600 VDC.

13. The system of claim 11, wherein the DC voltage V1 is between about 350-400 VDC and the DC voltage V2 is between about 12-90 VDC.

14. The system of claim 11, wherein the DC/DC converter is provides a constant current power source configured to drive the LED assembly.

15. The system of claim 11, wherein the AC/DC power supply includes a regulated power supply.

16. The system of claim 11, wherein the DC circuit includes wiring that matches or exceeds output current and output voltage ratings of the AC/DC power supply.

17. The system of claim 11, further comprising a controller configured to communicate to the LED lighting devices using wired or wireless data transmission techniques.

18. The system of claim 11, wherein the AC/DC power supply includes a surge protector for protecting downstream components and a filter for conditioning the output current of the AC/DC converter.

19. The lighting system of claim 11, further comprising a second DC power source operably coupled to the DC circuit downstream of the AC/DC converter.

20. The lighting system of claim 19, wherein the second DC power source includes at least one of (i) a photovoltaic panel or array, (ii) a battery, and (iii) an electrochemical fuel cell.

21. A lighting system, comprising an AC/DC power supply including a filter and a surge protector adapted to be coupled to at least one AC electric main, the AC/DC power supply being configured to convert AC input power into regulated power at a first DC voltage V1 that is provided to at least one output terminal of the AC/DC power supply, wherein the DC voltage V1 is higher than the peak voltage of the sine wave of the at least one electric main;

and

22. The lighting system of claim 21, further comprising at least one lighting device, the at least one lighting device having (i) a DC/DC converter configured to convert the first DC voltage V1 into a second DC voltage V2<

V1, (ii) a LED driving circuit powered using the DC voltage V2, and (iii) at least one LED assembly powered using the LED driving circuit; and

a DC circuit including wiring that is configured to selectively couple the at least one lighting device to the at least one output terminal of the AC/DC power supply.

23. The lighting system of claim 21, wherein the power supply is adapted to accept AC input power provided at 110-347 VAC.

24. The system of claim 21, wherein the DC voltage V1 as between about 350-400 VDC.