Arrangement for driving LED lighting sources

• US 7,683,861 B2
• Filed: 11/21/2006
• Issued: 03/23/2010
• Est. Priority Date: 11/22/2005
• Status: Active Grant

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Scilla, Giovanni
• Primary Examiner(s): Owens; Douglas W
• Assistant Examiner(s): Alemu; Ephrem
• Application Number:
  US11/602,181
• Publication Number:
  US 20070127239A1
• Time in Patent Office: 1,218 Days
• Field of Search: 315/308, 315/307, 315/149, 315/150, 315/291, 315/224, 315/185.R, 362/800, 345/55, 345 76- 83, 345/204
• US Class Current: 345/76
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/46 having LEDs disposed in parallel lines

Abstract

A driving arrangement for a plurality of light emitting diodes (LEDs), comprising a first power supply line (Vcc), a second power supply line (GND) and a set of signal lines (1a, 1b, 1c) for carrying brightness intensity and or chromatic information for the plurality of light emitting diodes (54). In a first possible configuration of use, the first (Vcc) and second (GND) power supply line jointly supply power to an “active” lighting source and the light emitting diodes (54) are driven as a function of the brightness intensity information provided via the signal lines (1a, 1b, 1c). In a second possible configuration of use for driving a “passive” source, the second power supply line (GND) is not used and the brightness of the light emitting diodes (54) is controlled by switching signals applied via the first power supply line (Vcc) and the set of signal lines (1a, 1b, 1c).

Claims

1. A driving arrangement for driving a lighting source comprising a plurality of light emitting diodes, the driving arrangement comprising:

a first power supply line (Vcc) and a set of signal lines for carrying information for said plurality of light emitting diodes, the driving arrangement further including;

a second power supply line (GND) to provide jointly with said first power supply line (Vcc) a two-wire power supply, and

a switching block to generate switching signals to provide driving information for said plurality of light emitting diodes via said set of signal lines

wherein the driving arrangement is configured to drive an active lighting source in such a way that power is supplied to the active lighting source via the first and second power supply lines and driving information is provided on the signal lines,

and wherein the driving arrangement is further configured to drive a passive lighting source in such a way that switching signals to drive the light emitting diodes of the passive lighting source are supplied via the first power line and the signal lines and that the second power supply line is not used to drive the passive lighting source.

2. The driving arrangement of claim 1, characterized in that said driving information is brightness intensity information.

3. The driving arrangement claim 1 characterized in that said driving information is chromatic information.

4. The driving arrangement of claim 1 characterized in that said driving information is a combination of brightness intensity and chromatic information.

5. The driving arrangement of claim 1 further comprising a lighting source including a plurality of light emitting diodes coupled to a micro-processor for driving said plurality of light emitting diodes as a function of said driving information provided by said switching signals generated by said switching block and applied to said micro-processor via said set of signal lines, wherein said first (Vcc) and second (GND) power supply lines jointly supply power to said micro-processor.

6. The driving arrangement of claim 1 further comprising a lighting source including a plurality of light emitting diodes wherein the brightness of said plurality of light emitting diodes is controlled by said switching signals generated by said switching block and applied to said plurality of light emitting diodes via said first (Vcc) power supply line and said set of signal lines.

7. The driving arrangement of claim 6, wherein said plurality of light emitting diodes are coupled to respective current regulators.

8. The driving arrangement of claim 5, wherein said plurality of light emitting diodes jointly define a trichromatic lighting system.

9. The driving arrangement of claim 5, wherein said plurality of light emitting diodes jointly define a multichromatic lighting system.

10. The driving arrangement of claim 9, wherein said plurality of light emitting diodes jointly define an RGB lighting system.

11. The driving arrangement of claim 9, wherein said plurality of light emitting diodes jointly define a tunable-white lighting system.

12. The driving arrangement of claim 1, wherein said set of signal lines includes three signal lines.

13. The driving arrangement of claim 1, wherein said set of signal lines includes a number of signal lines between four to six signal lines.

14. The driving arrangement of claim 2 further comprising a lighting source including a plurality of light emitting diodes wherein the brightness of said plurality of light emitting diodes is controlled by said switching signals generated by said switching block and applied to said plurality of light emitting diodes via said first (Vcc) power supply line and said set of signal lines.

15. The driving arrangement of claim 3 further comprising a lighting source including a plurality of light emitting diodes wherein the chromaticity of said plurality of light emitting diodes is controlled by said switching signals generated by said switching block and applied to said plurality of light emitting diodes via said first (Vcc) power supply line and said set of signal lines.

16. The driving arrangement of claim 6, wherein said plurality of light emitting diodes jointly define a trichromatic lighting system.

17. The driving arrangement of claim 7, wherein said plurality of light emitting diodes jointly define a trichromatic lighting system.

18. The driving arrangement of claim 6, wherein said plurality of light emitting diodes jointly define a multichromatic lighting system.

19. The driving arrangement of claim 7, wherein said plurality of light emitting diodes jointly define a multichromatic lighting system.

20. The driving arrangement of claim 2 further comprising a lighting source including a plurality of light emitting diodes coupled to a micro-processor for driving said plurality of Light emitting diodes as a function of said brightness intensity provided by said switching signals generated by said switching block and applied to said micro-processor via said set of signal lines, wherein said first (Vcc) and second (GND) power supply lines jointly supply power to said micro-processor.

21. The driving arrangement of claim 3 with a lighting source including a plurality of light emitting diodes coupled to a micro-processor for driving said plurality of light emitting diodes as a function of said chromatic information provided by said switching signals generated by said switching block and applied to said micro-processor via said set of signal Lines, wherein said first (Vcc) and second (GND) power supply Lines jointly supply power to said micro-processor.