LED lighting system

• US 9,198,237 B2
• Filed: 05/12/2011
• Issued: 11/24/2015
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Lynk Labs, Inc.
• Original Assignee: Lynk Labs, Inc.
• Inventors: Miskin, Michael
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): King, Monica C
• Application Number:
  US13/697,646
• Publication Number:
  US 20130051001A1
• Time in Patent Office: 1,657 Days
• US Class Current: 1/1
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/42 Antiparallel configurations
• CPC Class Codes: H05B 45/50 responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits

Abstract

An LED lighting system having at least one LED circuit and at least two circuits or drivers capable of receiving an AC voltage at a first frequency and having an output capable of driving the at least one LED circuit, wherein the output of each circuit or driver capable of driving the at least one LED circuit is provided to the at least one LED circuit through a circuit or sensor capable of permitting only a single output from the at least two circuits or drivers be provided to the at least one LED circuit.

Claims

1. An LED lighting system comprising:

at least one LED circuit comprising at least two LEDs connected in series;

a driver having an input for receiving a first AC voltage and frequency from an AC power source, the driver having

a first circuit capable of receiving the first AC voltage and first frequency and having an output capable of being connected to the at least one LED circuit to drive the at least two LEDs;

a second circuit capable of receiving the first AC voltage and first frequency and having an output capable of being connected to the at least one LED circuit to drive the at least two LEDs; and

,

a third circuit which senses and permits the output of only one of the first or second circuits to be provided to the at least one LED circuit.

2. The LED lighting system of claim 1 wherein the third circuit is configured to sense and provide the output of the first circuit to the at least one LED circuit.

3. The LED lighting system of claim 1 wherein the third circuit is configured to sense and provide to the output of the second circuit to the at least one LED circuit if no output is sensed from the first circuit.

4. The LED lighting system of claim 1 wherein the AC voltage source is mains power.

5. The LED lighting system of claim 1 further comprising at least two LED circuits each having at least two LEDs connected in series.

6. The LED lighting system of claim 1 wherein each of the first and second circuit includes a resistor, a fuse and a bridge rectifier connected in series with the received AC voltage and current such that the output of the first and second circuits is a DC voltage and current.

7. The LED lighting system of claim 6 wherein the first and second circuit further include a voltage suppressor connected in parallel with the bridge rectifier, the voltage suppressor being connected in series with the resistor and the fuse.

8. The LED lighting system of claim 7 wherein the voltage suppressor is a transient voltage suppressor.

9. The LED lighting system of claim 1 wherein the at least one LED circuit includes a resistor connected in series with the two or more LEDs.

10. The LED lighting system of claim 9 wherein the at least one LED circuit includes a capacitor connected in parallel with the resistor.

11. The LED lighting system of claim 1 further comprising at least one additional circuit capable of receiving the first AC voltage and first frequency and having an output capable of being connected to the at least one LED circuit to drive the at least two LEDs.

12. The LED lighting system of claim 11 wherein the third circuit is configured to switch to the at least one additional circuit if no output is sensed from the first circuit or the second circuit.

13. The system of claim 1 wherein the first and second circuits include a transformer connected to the AC power source for stepping the input AC voltage up or down.

14. The system of claim 13 wherein the first and second circuits include a transformer connected to the AC power source for stepping the frequency of the input AC voltage up or down.

15. The LED lighting system of claim 1 wherein the forward voltage of each of the at least two LEDs is at least 36V.

16. The LED lighting system of claim 1 wherein the driver further includes at least two capacitors connected to a fourth circuit wherein the fourth circuit only allows one of the at least two capacitors to connect to the first or second circuit.

17. The LED lighting system of claim 16 wherein the fourth circuit is configured to disconnect the one of the at least two capacitors connected to the first or second circuit if the one capacitor fails.

18. The LED lighting system of claim 17 wherein the fourth circuit connects a different capacitor from the at least two capacitors to the first or second circuit if the one of the at least two capacitors fails.