LED luminaires power supply

• US 8,604,712 B2
• Filed: 04/01/2011
• Issued: 12/10/2013
• Est. Priority Date: 08/17/2010
• Status: Expired due to Fees

• Current Assignee: Keystone L.E.D. Holdings LLC
• Original Assignee: Keystone L.E.D. Holdings LLC
• Inventors: Bloom, John R., Bloom, Walter M., Frantz, Richard A., Clark, Daniel J.
• Primary Examiner(s): Tan, Vibol
• Application Number:
  US13/078,077
• Publication Number:
  US 20120043909A1
• Time in Patent Office: 984 Days
• Field of Search: 315/155, 315/158, 315/194, 315/209.R, 315/291, 315/246, 315/247, 315/294, 315/307, 315/360
• US Class Current: 315/294
• CPC Class Codes: H05B 45/52 in a parallel array of LEDs
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

An LED luminaires power supply that isolates dangerous line power from the LED luminaires. The power supply'"'"'s footprint may enable retrofitting in existing lighting fixtures (e.g., replace ballast in florescent tube troffer). The power supply may individually power a plurality of LED luminaires based on power requirements of the individual LED luminaires. The power supply may receive and interpret TRIAC dimmer signals and/or other lighting protocol commands and provide dimming and/or other lighting scenarios to the LED luminaires. The power supply may include identification readers to read identification and/or power requirements for the LED luminaires being powered thereby (stored in luminaires or in adapters connected to luminaires). The LED luminaires driven by the power supply may include individual lighting fixtures (e.g., LED tubes, LED bulbs), a plurality of LED light arrays in a single light fixture (e.g., LED street lights, LED high hats), or some combination thereof.

Claims

1. A power supply comprising:

a first connector to receive line power;

a plurality of supply and control circuits associated with a plurality of LED luminaires, wherein each of the plurality of LED luminaires has a power profile associated therewith, and wherein each of the plurality of supply and control circuits is to individually convert the line power to power necessary to drive an associated LED luminaire based on the power profile associated therewith; and

a plurality of second connectors to provide the necessary power to the associated ones of the plurality of LED luminaires.

2. The power supply of claim 1, wherein each supply and control circuit isolates the line power from an associated second connector.

3. The power supply of claim 1, wherein each supply and control circuit includes a driver to convert the line power into small slices, wherein frequency of the small slices is based on the power profile for an associated LED luminaire, wherein the frequency of the small slices determines current that will flow through the associated LED luminaire, and wherein each driver receives feedback related to the current flowing through the associated LED luminaire and makes necessary adjustments.

4. The power supply of claim 3, further comprising circuitry to imitate to a TRIAC dimmer used to adjust the line power that the TRIAC dimmer is connected to a resistive load, receive dimming signals from the TRIAC dimmer, and provide the TRIAC dimming signals to at least one driver, wherein the at least one driver interprets the TRIAC dimming signals and makes necessary adjustments to provide dimming.

5. The power supply of claim 4, wherein the circuitry provides the TRIAC dimming signals to a master driver and the master driver provides dimming instructions to the other drivers that act as slaves for dimming.

6. The power supply of claim 5, wherein the dimming instructions are a reference voltage.

7. The power supply of claim 3, further comprising a lighting protocol adapter to receive and interpret lighting protocol commands and provide the interpreted lighting commands to at least one driver and the at least one driver makes necessary adjustments.

8. The power supply of claim 1, further comprising at least one luminaire identification reader to read the power profile for an associated LED luminaire from the associated LED luminaire and provide the power requirements to an associated supply and control circuit.

9. The power supply of claim 1, further comprising at least one expansion slot to receive a plug-in card that includes one or more supply and control circuits and associated second connectors.

10. The power supply of claim 1, wherein a supply and control circuit may stop providing power to an associated LED luminaire if it determines the LED luminaire is non-operational.

11. The power supply of claim 1, wherein the plurality of associated luminaires are contained within a single light fixture.

12. The power supply of claim 1, wherein the plurality of associated luminaires includes a plurality of LED tubes having substantially same form factor as fluorescent tubes utilized in fluorescent light troffers and the power supply has substantially same form factor as a ballast used to provide power the florescent tubes.

13. The power supply of claim 1, further comprising a monitoring and maintenance adapter to communicate with an external monitoring and maintenance entity regarding operation of the power supply and the luminaires.

14. A power supply comprising:

a first connector to receive line power;

a supply and control circuit to convert the line power to a power profile for an LED luminaire to be powered by the power supply;

a second connector to provide the power profile to the LED luminaire; and

an identification reader to read the power profile for the LED luminaire from the LED luminaire and provide the power profile to the supply and control circuit.

15. The power supply of claim 14, wherein the supply and control circuit includes a driver to convert the line power into small slices where frequency of the small slices is based on the power profile for the LED luminaire, wherein the frequency determines current that will flow through the LED luminaire, and wherein the driver receives feedback related to the current flowing through the LED luminaire and makes necessary adjustments.

16. The power supply of claim 15, wherein the first connector is to receive the line power via a TRIAC dimmer, and further comprising circuitry to imitate to the TRIAC dimmer that it is connected to a resistive load, receive dimming signals from the TRIAC dimmer, and provide the TRIAC dimming signals to the driver, wherein the driver interprets the TRIAC dimming signals and makes necessary adjustments to provide dimming.

17. The power supply of claim 15, further comprising a lighting protocol adapter to receive and interpret lighting protocol commands and provide the interpreted lighting commands to the driver, wherein the driver makes necessary adjustments, wherein the lighting protocol commands include dimming.

18. The power supply of claim 14, further comprising at least one expansion slot to receive a plug-in card that includes one or more supply and control circuits, associated second connectors and associated identification readers.

19. The power supply of claim 14, wherein the power profile includes at least some subset of optimal operational power, dimming profiles, color temperature, heat tolerance, LEDs, and array configuration.

20. The power supply of claim 14, wherein the identification reader is an RFID reader.

21. The power supply of claim 14, wherein the identification reader is a ROM interface.

22. The power supply of claim 14, wherein the identification reader includes circuitry to read the power profile from the luminaire, wherein the power profile may be stored in passive circuitry, active circuitry or an impulse response trigger on the luminaire.

23. The power supply of claim 14, further comprising a monitoring and maintenance adapter to communicate with an external monitoring and maintenance entity regarding operation of the power supply and the luminaire.

24. A power supply comprising:

a first connector to receive line power via a TRIAC dimmer;

circuitry to imitate to the TRIAC dimmer that it is connected to a resistive load;

a plurality of supply and control circuits to individually provide power to LED luminaires connected thereto that are operational, wherein each supply and control circuit is to convert the line power to a power profile for an associated LED luminaire, wherein each supply and control circuit includes a driver to convert the line power into small slices where frequency of the small slices is based on the power profile for the associated LED luminaire and the frequency determines current that will flow through the associated LED luminaire, wherein each driver receives feedback related to the current flowing through the associated LED luminaire and makes necessary adjustments, and wherein at least one driver receives dimming signals from the TRIAC dimmer, interprets the TRIAC dimming signals and makes necessary adjustments to provide dimming;

a plurality of second connectors to provide the power profile to the associated LED luminaires; and

a plurality of identification readers to read the power profile for the associated LED luminaires from the associated LED luminaires and provide the power profile to the associated driver.

25. The power supply of claim 24, further comprising a lighting protocol adapter to interface with an intelligent lighting system, wherein the lighting protocol adapter is to receive lighting protocol commands from the intelligent lighting system, interpret the lighting protocol commands, and provide the interpreted commands to at least one driver, wherein the at least one driver is to make necessary adjustments to implement the lighting protocol commands.

26. The power supply of claim 24, further comprising at least one expansion slot to receive a plug-in card that includes one or more supply and control circuits, associated second connectors and associated identification readers.

27. The power supply of claim 24, further comprising a monitoring and maintenance adapter to communicate with an external monitoring and maintenance entity regarding operation of the power supply and the luminaires.