LED lighting system

• US 9,615,420 B2
• Filed: 11/23/2015
• Issued: 04/04/2017
• 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): King, Monica C
• Application Number:
  US14/948,635
• Publication Number:
  US 20160095180A1
• Time in Patent Office: 498 Days
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: H05B 45/40 Details of LED load 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
• 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 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 first driver having an input for receiving a first AC voltage and frequency from an AC power source, the first driver having a first driver output;

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

,

a sensor for sensing the first driver output and the second driver output, the sensor being configured to selectively provide the first driver output or the second driver output to the at least one LED circuit, to drive the at least one LED circuit.

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

3. The LED lighting system of claim 1 wherein the sensor is configured to provide the second driver output to the at least one LED circuit if the first driver output is not sensed.

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

5. The LED lighting system of claim 1 wherein each of the first and second drivers include a resistor, a fuse, and a bridge rectifier connected in series such that the first driver output and the second driver output are a DC voltage and current.

6. The LED lighting system of claim 5 wherein each of the first and second drivers include a voltage suppressor.

7. The LED lighting system of claim 5 wherein the voltage suppressor is a transient voltage suppressor.

8. The LED lighting system of claim 1 wherein the first and second drivers each include a transformer capable of stepping the first AC voltage up or down.

9. The LED lighting system of claim 1 wherein the first and second drivers each include a transformer capable of stepping the first AC frequency up or down.

10. The LED lighting system of claim 1 further comprising at least two LED circuits comprising at least two LEDs connected in series wherein the at least two LED circuits are connected to each other in parallel and are capable of selectively receiving the first driver output or the second driver output.

11. The LED lighting system of claim 10 wherein the at least two LED circuits each include a resistor connected in series with the at least two LEDs.

12. The LED lighting system of claim 10 wherein the at least two LED circuits each include a capacitor connected in series with the at least two LEDs.

13. The LED lighting system of claim 12 wherein the capacitor is connected in parallel to a resistor.

14. The LED lighting system of claim 1 further comprising at least one additional driver having an input for receiving a first AC voltage and frequency from an AC power source, the third driver having a third driver output.

15. The LED lighting system of claim 14 further wherein the sensor is capable of providing the third driver output to the at least one LED circuit if the first driver output and the second driver output are not sensed by the sensor.