LED lighting system driven at high voltage DC

• US 9,795,011 B2
• Filed: 03/03/2014
• Issued: 10/17/2017
• 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
• Primary Examiner(s): TRAN, THUY V
• Application Number:
  US14/195,464
• Publication Number:
  US 20140246986A1
• Time in Patent Office: 1,324 Days
• Field of Search: 315209 R, 315210, 315291, 315292, 315294
• 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 system, comprising:

a single AC/DC power supply, having an AC input terminal configured for being coupled to an AC electrical main and a DC output terminal, the AC/DC power supply configured to convert AC input power into DC output power at a first DC voltage (V1), wherein the first DC voltage (V1) is higher than the root mean square value of either a line voltage or phase voltage in the AC electrical main;

the DC output terminal is connected to an input of each of a plurality of DC/DC converters, each of the DC/DC converters including an output connected to a respective LED driving circuit and adapted to convert electrical power at the first DC voltage (V1) into electrical power at a second DC voltage (V2) for the respective LED driving circuit, wherein each of the respective LED driving circuits is coupled to at least one LED assembly;

wherein each of said at least one LED assembly is powered by the respective second DC voltage (V2); and

a control module configured to control at least one of the LED driving circuits using wired or wireless data transmission techniques.

2. The lighting system of claim 1, wherein the first DC voltage (V1) is higher than the second DC voltage (V2).

3. The lighting system of claim 1, wherein the first DC voltage (V1) is selected in a range from about 100 to about 600 VDC.

4. The lighting system of claim 1, wherein the first DC voltage (V1) is between about 350-400 VDC and the second DC voltage (V2) is between about 12-90VDC.

5. The lighting system of claim 1, wherein the first DC voltage (V1) is equal to or lower than the second DC voltage (V2).

6. The lighting system of claim 1, wherein the DC output terminal includes wiring that provides electric power to the plurality of DC/DC converters at the first DC voltage (V1).

7. The lighting system of claim 1, wherein each of the at least one LED assembly includes at least one LED.

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

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

10. A lighting system, comprising:

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

a plurality of DC/DC converters, each of the DC/DC converters including an output connected to a respective LED driving circuit, and adapted to convert electrical power at the first stepped up DC voltage (V1) into electrical power at a second DC voltage (V2) for the respective LED driving circuit, wherein each of the respective LED driving circuits is coupled to at least one LED assembly; and

each of the LED assembly electrically coupled to the single AC/DC power supply, at least one of the LED assembly having one of said plurality of DC/DC converters configured to convert power at the first stepped up DC voltage (V1) into power at the second DC voltage (V2) to power each of said LED assemblies;

wherein the first stepped up DC voltage (V1) is selected in a range from about 100 to about 600 VDC; and

a controller configured to communicate to the LED assemblies using wired or wireless data transmission techniques.

11. The system of claim 10, wherein the first stepped up DC voltage (V1) is between about 350-400 VDC and the second DC voltage (V2) is between about 12-90VDC.

12. The system of claim 10, wherein each of the at least one DC/DC converters provides a constant current power source configured to drive the LED assembly to which it is coupled.

13. The system of claim 10, wherein the AC/DC power supply includes a regulated power supply.

14. The system of claim 10, wherein the LED driving circuit includes wiring that matches or exceeds output current and output voltage ratings of the AC/DC power supply.

15. The system of claim 10, 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.

16. A lighting system, comprising:

a single AC/DC power supply including a filter and a surge protector, the single AC/DC power supply adapted to be coupled to at least one AC electric mains, the single 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 DC output terminal of the AC/DC power supply, wherein the first DC voltage (V1) is higher than the peak voltage of the sine wave of the at least one AC electric mains;

at least one DC/DC converter connected to the at least one DC output terminal of the single AC/DC power supply, each DC/DC converter of the at least one DC/DC converter is adapted to convert electrical power at the first DC voltage (V1) into electrical power at a second DC voltage (V2);

a respective LED driving circuit coupled to a respective output of each of the at least one DC/DC converter, each LED driving circuit configured to supply a regulated output to a plurality of LED assemblies;

wherein, for each of the at least one DC/DC converter, the second DC voltage is less than the first DC voltage and the respective LED driving circuit is configured to selectively couple the plurality of LED assemblies to the respective DC/DC converter; and

a control module configured to control at least one of the LED driving circuits using wired or wireless data transmission techniques.

17. The lighting system of claim 16, wherein the single AC/DC power supply is adapted to accept AC input power provided at 110-347 VAC.

18. The system of claim 16, wherein the first DC voltage (V1) as between about 350-400 VDC.