AC light emitting diode and AC LED drive methods and apparatus

• US 8,148,905 B2
• Filed: 02/03/2009
• Issued: 04/03/2012
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Lynk Labs, Inc.
• Original Assignee: Lynk Labs, Inc.
• Inventors: Miskin, Michael, Anderson, James
• Primary Examiner(s): Vu, David Hung
• Application Number:
  US12/364,890
• Publication Number:
  US 20090167202A1
• Time in Patent Office: 1,155 Days
• Field of Search: 315/185.R, 315/210, 315/224, 315/225, 315/226, 315/291, 315/187, 315/192
• US Class Current: 315/185.R
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05B 45/382 with galvanic isolation between input and output
• CPC Class Codes: H05B 45/39 Circuits containing inverter bridges
• CPC Class Codes: H05B 45/42 Antiparallel configurations

Abstract

An AC LED package and circuits are disclosed along with an AC LED driver. The AC LED circuit may include as few as one LED or an array of anti-parallel LEDs driven with AC power sources and AC LED drivers at various voltages and frequencies. The AC LEDs are pre-packaged in various forms and materials and designed for mains or high frequency coupling in various forms to AC power sources, inverter type drivers or packages. The AC LED driver is a fixed frequency driver that provides a relatively constant voltage output to different size loads within the wattage limitation of the driver and in some cases is a direct mains power source.

Claims

1. A lighting system comprising:

two or more LED circuits each LED circuit having at least two diodes connected to each other in opposing parallel relation, at least one of which such diodes is an LED;

a driver connected to the two or more LED circuits, the driver providing AC voltage and current to the two or more LED circuits, the driver having an input of a first AC voltage and a first frequency and an output of a second AC voltage and a second frequency, which the second AC voltage is a relatively fixed voltage and the second frequency is a relatively higher frequency

wherein the driver and the two or more LED circuits forming a driven circuit and the driver and the two or more LED circuits being configured such that one or more LED circuits can be added to or subtracted from the driven circuit so long as the total wattage output of the driver is not exceeded;

(a) without significantly affecting a pre-determined desired output range of light from any individual LED;

(b) without the need to;

(i) change a value of any discrete component;

or, (ii) to add or subtract any discrete components, of any of the pre-existing driven circuit components which remain after the change.

2. The lighting system of claim 1 further comprising at least one resistor being connected to and being part of each opposing parallel LED circuit, the resistor being connected in series with at least one capacitor.

3. The lighting system of claim 1 wherein the AC driver is the mains power and the LED circuits are packaged with connectors which accommodate a standard utility outlet.

4. The lighting system of claim 1 wherein the AC driver provides high frequency AC voltage.

5. The lighting system of claim 4 wherein the frequency provided by the driver is above 100 cycles per second.

6. The lighting system of claim 1 wherein at least one of the two or more LED circuits has opposing parallel series strings of LEDs.

7. The lighting system of claim 1 wherein the two or more LED circuits are packaged separately from the driver.

8. The lighting system of claim 7 wherein the packaged LED circuits include one or more lenses.

9. The lighting system of claim 1 wherein at least one capacitor is the discrete components.

10. The lighting system of claim 1 wherein a capacitance is provided as an inherent attribute of a circuit component which serves to provide a function in addition to or besides providing capacitance.

11. The lighting system of claim 1 including a phosphor coating over the LEDs.

12. The lighting system of claim 1 including lenses for the LEDS and nano-crystals doped in the lenses to affect the light output of the LEDs.

13. The lighting system of claim 7 wherein the package includes one or more of an integrated heat sinking material, a reflective material integrated within the package near the LEDs reflecting the light out from the package, and lenses for the LEDs.

14. The lighting system of claim 1 wherein the LEDs are organic LEDs.

15. The lighting system of claim 5 wherein the driver is an inverter.

16. The lighting system of claim 15 wherein the inverter is configured to provide a relatively constant output frequency and voltage under variable loads.