AC light emitting diode and AC LED drive methods and apparatus

Patent metadata

Field	Value
Publication number	US-9807827-B2
Application number	US-201615334020-A
Country	US
Kind code	B2
Filing date	Oct 25, 2016
Priority date	Feb 25, 2004
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

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.

First claim

What is claimed is:

1. A lighting system comprising:
an LED circuit having at least one LED;
a bridge rectifier;
a driver connected to the bridge rectifier;
the driver providing AC voltage and current to the bridge rectifier and the bridge rectifier providing DC voltage and current to the LED circuit,
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, wherein the second frequency is a relatively higher frequency,
further wherein the driver includes a voltage regulator which regulates the second AC voltage at a relatively fixed level so long as the total output wattage of the driver is not exceeded,
a dimmer coupled to the driver, wherein the dimmer includes integrated circuitry that allows for adjustability of the level of the second AC voltage and/or the second frequency.

2. The lighting system of claim 1 , wherein the voltage regulator is feedback voltage regulator circuitry.

3. The lighting system of claim 1 wherein the relatively fixed level of the second AC voltage is 12V.

4. The lighting system of claim 1 , wherein the driver further includes power factor correction circuitry.

5. The lighting system of claim 1 , wherein the bridge rectifier and the LED circuit are packaged together on a single substrate.

6. The lighting system of claim 5 , wherein the substrate includes a heat sink material.

7. A lighting system comprising:
an LED circuit having at least one LED;
a bridge rectifier;
a driver connected to the bridge rectifier;
the driver providing AC voltage and current to the bridge rectifier and the bridge rectifier providing DC voltage and current to the LED circuit,
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, wherein the second frequency is a relatively higher frequency,
further wherein the driver includes a voltage regulator which regulates the second AC voltage at a relatively fixed level when one or more LED circuits are added to or subtracted from the Lighting System.

8. The lighting system of claim 7 , wherein the voltage regulator is feedback voltage regulator circuitry.

9. The lighting system of claim 7 , wherein the driver further includes power factor correction circuitry.

10. The lighting system of claim 7 , wherein the bridge rectifier and the LED circuit are packaged together on a single substrate.

11. The lighting system of claim 10 , wherein the substrate includes a heat sink material.

12. The lighting system of claim 7 having a dimmer coupled to the driver, wherein the dimmer includes integrated circuitry that allows for adjustability of the level of the second AC voltage and/or the second frequency.

13. A lighting system comprising:
at least one LED circuit having at least two LEDs connected together in series and mounted on a reflective substrate, the at least one LED circuit being capable of emitting light during both a positive phase and a negative phase of an AC power supply;
a driver connected to the at least one LED circuit, the driver providing AC voltage and current to the at least one LED circuit, 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 when connected to the at least one LED circuit;
the driver being capable of sensing changes to the load when connected to the at least one LED circuit, and the driver being capable of re-adjusting the frequency and/or AC voltage output of the driver to a desired relatively fixed value in response to changes to the load,
wherein the driver and the at least one LED circuit form a driven circuit and the driver and the at least one LED circuit being configured such that one or more additional 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 pre-existing or remaining LED circuit;
(b) the need to: (i) change the impedance value of any pre-existing or remaining discrete components in the driven circuit(s) which remain after the change.

14. A lighting system comprising:
at least one LED circuit having at least two LEDs connected together in series and mounted on a reflective substrate, the at least one LED circuit being capable of emitting light during both a positive phase and a negative phase of an AC power supply;
a driver connected to the at least one LED circuit, the driver providing AC voltage and current to the at least one LED circuit, 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 when connected to the at least one LED circuit;
the driver being capable of sensing changes to the load when connected to the at least one LED circuit, and the driver being capable of re-adjusting the frequency and/or AC voltage output of the driver to a desired relatively fixed value in response to changes to the load,
wherein the driver and the at least one LED circuit form a driven circuit and the driver and the at least one LED circuit being configured such that one or more additional 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.

15. A lighting system comprising:
at least one LED circuit having at least two LEDs connected together in series and mounted on a reflective substrate;
at least one bridge rectifier;
a driver connected to the least one bridge rectifier, the driver providing AC voltage and current to the at least one bridge rectifier, and the bridge rectifier providing DC voltage and current to the at least one LED circuit, 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 when connected to the at least one LED circuit,
the driver being capable of sensing changes to the LED load when connected to the at least one LED circuit, and the driver being capable of re-adjusting the frequency and/or AC voltage output of the driver to a desired relatively fixed value in response to changes to the load, wherein the driver, the at least one bridge rectifier, and the at least one LED circuit form a driven circuit and the driver, the at least one bridge rectifier, and the at least one LED circuit 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.

16. A lighting system comprising:
at least one LED circuit having at least two LEDs connected together in series and mounted on a reflective substrate;
at least one bridge rectifier;
a driver connected to the least one bridge rectifier, the driver providing AC voltage and current to the at least one bridge rectifier, and the b

Assignees

• Lynk Labs Inc

Inventors

• Miskin Michael
• Andersen James N

Classifications

• H05B45/50

  responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits · CPC title

• H05B33/0845

  Electricity · mapped topic

• H05B33/0809 Primary

  Electricity · mapped topic

• H05B33/089

  Electricity · mapped topic

• H05B45/10 Primary

  Controlling the intensity of the light · CPC title