AC light emitting diode and AC LED drive methods and apparatus

• US 10,091,842 B2
• Filed: 10/25/2016
• Issued: 10/02/2018
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Lynk Labs, Inc.
• Original Assignee: Lynk Labs, Inc.
• Inventors: Miskin, Michael, Andersen, James N.
• Primary Examiner(s): King, Monica C
• Application Number:
  US15/334,029
• Publication Number:
  US 20170208656A1
• Time in Patent Office: 707 Days
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/39 Circuits containing inverter bridges
• CPC Class Codes: H05B 45/42 Antiparallel configurations
• CPC Class Codes: H05B 47/25 Circuit arrangements for protecting against overcurrent

Abstract

An LED device for use with an AC voltage power source configured such that at least one LED emits light during a positive phase of power provided from an AC power supply and at least one LED emits light during the negative phase of power provided from an AC power supply. The LED device includes a first power connection lead and a second power connection lead, both leads capable of being connected to and receiving power from an AC power supply.

Claims

1. An LED driver comprising:

an input of a first voltage and a first frequency, wherein the first voltage is an AC voltage;

the LED driver connected to at least one LED circuit and providing an output of a second voltage and a second frequency to the at least one LED circuit, wherein the second voltage is either a rectified DC voltage or a rectified AC voltage and wherein the second frequency of the output is a relatively higher frequency than the first frequency of the input; and

wherein the LED driver includes a voltage regulator which regulates the second voltage at a relatively fixed level with respect to changes in an LED load connected to the output of the LED driver.

2. The LED driver of claim 1, wherein the at least one LED circuit comprises at least one capacitor connected to the LED driver, wherein the at least one capacitor smoothes the output of the second voltage delivered to the at least one LED circuit.

3. The LED driver of claim 1, wherein the voltage regulator is a feedback voltage regulator.

4. The LED driver of claim 1, wherein the relatively fixed level of the second voltage is about 12V.

5. The LED driver of claim 1, wherein the at least one LED circuit comprises a bridge rectifier that receives the output of the LED driver and outputs a DC voltage to the at least one LED circuit, and wherein the bridge rectifier and the LED circuit are packaged together on a single substrate.

6. The LED driver of claim 1, wherein a dimmer is coupled to the LED driver, and wherein the dimmer includes integrated circuitry that allows for adjustability of at least one of a level of the second voltage or the second frequency of the output of the LED driver.

12. The LED driver of claim 1 being configured for receiving one of at least two different input voltages.

7. An LED driver comprising:

an input of a first AC voltage and a first frequency;

the LED driver being electrically connected to at least one LED circuit comprising at least one LED and a bridge rectifier,

the LED driver providing an output of a second AC voltage and a second frequency to the at least one LED circuit, wherein the second frequency is a relatively higher frequency than the first frequency;

the LED driver providing the second AC voltage and an AC current to the bridge rectifier and the bridge rectifier providing a DC voltage and a DC current to the at least one LED circuit; and

wherein the LED driver includes a voltage regulator which regulates the second AC voltage at a relatively fixed level with respect to changes in an LED load connected to the output of the LED driver.

8. The LED driver of claim 7, wherein the at least one LED circuit comprises at least one capacitor connected to the LED driver and at least one LED circuit, wherein the capacitor smoothes the DC voltage and the DC current delivered to the at least one LED circuit.

9. The LED driver of claim 7, wherein the voltage regulator is a feedback voltage regulator.

10. The LED driver of claim 7, wherein the at least one LED circuit is connected to the LED driver and comprises a bridge rectifier and at least one capacitor, wherein the bridge rectifier, the at least one LED circuit, and the at least one capacitor are-packaged together on a single reflective PCB substrate.

11. The LED driver of claim 7, wherein a dimmer is coupled to the LED driver, wherein the dimmer includes integrated circuitry that allows for adjustability of at least one of a level of the second AC voltage or the second frequency of the output of the LED driver.

13. An LED lighting system comprising:

at least one LED circuit; and

an LED driver,

the LED driver having an input of a first voltage and a first frequency, wherein the first voltage is an AC voltage;

the LED driver connected to the at least one LED circuit and providing an output of a second voltage and a second frequency to the at least one LED circuit, wherein the second voltage is either a rectified DC voltage or a rectified AC voltage and wherein the second frequency of the output is a relatively higher frequency than the first frequency of the input; and

wherein the LED driver includes a voltage regulator which regulates the second voltage at a relatively fixed level in response to changes in a load connected to the output of the LED driver.

14. The LED lighting system of claim 13, wherein the LED driver further comprises at least one capacitor connected to the at least one LED circuit.

15. The LED lighting system of claim 14, further comprising:

at least one bridge rectifier, the at least one bridge rectifier, the at least one capacitor, and the at least one LED circuit being packaged together on a single substrate.

16. The LED lighting system of claim 13, wherein the voltage regulator is a feedback voltage regulator.

17. The LED lighting system of claim 13, wherein the relatively fixed level of the second voltage is about 12V.

18. The LED lighting system of claim 13, further comprising a dimmer coupled to the LED driver, wherein the dimmer includes integrated circuitry that allows for adjustability of at least one of the second voltage or the second frequency of the output by the LED driver.

19. The LED lighting system of claim 13, wherein the LED driver is configured for receiving one of at least two different input voltages.

20. An LED lighting system comprising:

an LED driver, the LED driver having an input of a first AC voltage and a first frequency;

the LED driver connected to at least one LED circuit and providing an output of a second rectified pulsed voltage and a second frequency to the at least one LED circuit, wherein the second frequency of the output is a relatively higher frequency than the first frequency of the input;

the at least one LED circuit connected to the output of the LED driver, the at least one LED circuit comprising at least one LED and a capacitor, wherein the capacitor receives the second rectified pulsed voltage and smoothes the second rectified pulsed voltage to provide a DC voltage and a DC current to the at least one LED; and

wherein the LED driver includes a voltage regulator which regulates the DC voltage at a relatively fixed level with respect to changes in a load connected to the output of the LED driver.

21. The LED lighting system of claim 20, wherein the at least one LED is mounted on a reflective PCB substrate.

22. The LED lighting system of claim 20, wherein the voltage regulator is a feedback voltage regulator.

23. The LED lighting system of claim 20, wherein the at least one LED circuit is packaged on a single reflective PCB substrate.

24. The LED lighting system of claim 20, further comprising a dimmer coupled to the LED driver, wherein the dimmer includes integrated circuitry that allows for adjustability of at least one of the second rectified pulsed voltage or the second frequency of the output of the LED driver.

25. The LED lighting system of claim 20, wherein the LED drive is configured for receiving one of at least two different input voltages.

26. An LED lighting system comprising:

an LED driver, the LED driver having an input for receiving a first AC voltage at a first frequency and having an output of a second rectified AC voltage at a second frequency, wherein the second frequency is a relatively higher frequency than the first frequency;

at least one LED circuit connected to the output of the LED driver;

wherein the LED driver includes a voltage regulator and a capacitor;

wherein the voltage regulator regulates the second rectified AC voltage at a relatively fixed level in response to changes in a load connected to the output of the LED driver; and

wherein the capacitor smoothes a waveform of the second rectified AC voltage and provides DC voltage and DC current to the at least one LED circuit.

27. The LED lighting system of claim 26, wherein the second rectified AC voltage of the output by the LED driver is a lower voltage than the first AC voltage of the input received by the LED driver.

28. The LED lighting system of claim 26, wherein the LED driver comprises a transformer.

29. An LED lighting system comprising:

an LED circuit having at least two LEDs connected in series or parallel;

a. bridge rectifier;

at least one capacitor connected to the LED circuit;

a driver;

the driver, the bridge rectifier, the at least one capacitor, and the LED circuit all being mounted on a reflective PCB substrate;

the driver having an input of a first AC voltage and a first current at a first frequency and the driver providing an output of a rectified and regulated second voltage and a second current at a second frequency to the LED circuit, wherein the second frequency is higher than the first frequency; and

the at least one capacitor smoothing a waveform of the rectified and regulated second voltage.

30. The LED lighting system of claim 29, wherein the driver independently provides power to multiple independently controlled LED circuits in the LED lighting system.

31. The LED lighting system of claim 29, wherein the LED circuit includes the at least one capacitor.

32. The LED lighting system of claim 29, wherein the LED circuit is connected to at least one of a switch or a dimmer switch.

33. An LED lighting system comprising:

an LED circuit array having a plurality of different LED circuits, each LED circuit having at least one LED;

an LED circuit driver, the LED circuit driver having an input of a first voltage and a first frequency, wherein the first voltage is an AC voltage;

the LED circuit driver connected to at least one LED circuit of the plurality of different LED circuits and providing an output of a second voltage and a second frequency to the at least one LED circuit, wherein the second voltage is either a rectified DC voltage or a rectified AC voltage and wherein the second frequency of the output is a relatively higher frequency than the first frequency of the input;

at least one LED in the LED circuit array being a different color than other LEDs in the LED circuit array; and

the plurality of different LED circuits capable of being connected to the output of the LED circuit driver in parallel one LED circuit at a time.

34. The LED lighting system of claim 33, wherein the LED circuit driver independently provides power to multiple independently controlled LED circuits in the LED circuit array.

35. The LED lighting system of claim 33, wherein each LED circuit comprises a capacitor.

36. The LED lighting system of claim 33, wherein the plurality of different LED circuits are mounted on a reflective PCB substrate.

37. The LED lighting system of claim 33, wherein the plurality of different LED circuits are connected to at least one of a switch or a dimmer switch.

38. An LED lighting system comprising:

an LED circuit array having a plurality of different LED circuits, each LED circuit comprising at least one LED;

an LED circuit driver having an input of a first voltage and a first frequency, wherein the first voltage is an AC voltage;

the LED circuit driver connected to at least one LED circuit of the plurality of different LED circuits and providing an output of a second voltage and a second frequency to the at least one LED circuit, wherein the second voltage is either a rectified DC voltage or a rectified AC voltage and wherein the second frequency of the output is a relatively higher frequency than the first frequency of the input;

at least one of the LEDs in the LED circuit array being coated or doped with at least one of a phosphor, nano-crystals, or a light changing or enhancing substance;

at least one of the coated or doped LEDs in the LED circuit array producing a different color of light than another coated or doped LED in the LED circuit array; and

the plurality of different LED circuits capable of being connected to the output of the LED circuit driver in parallel one LED circuit at a time.

39. The LED lighting system of claim 38, wherein the LED circuit driver independently provides power to multiple independently controlled LED circuits in the LED circuit array.

40. The LED lighting system of claim 38, wherein each LED circuit of the LED circuit array comprises a capacitor.

41. The LED lighting system of claim 38, wherein the plurality of different LED circuits are mounted on a reflective PCB substrate.

42. The LED lighting system of claim 38, wherein the plurality of different LED circuits are connected to at least one of a switch or a dimmer switch.

43. An LED lighting system comprising:

an LED circuit array having at least two independently controlled LED circuits, each LED circuit having at least one LED; and

an LED circuit driver capable of independently providing power to one or more of the at least two independently controlled LED circuits in the LED circuit array.

44. The LED lighting system of claim 43, wherein the LED circuit array is coupled to at least one of a switch or a dimmer switch.