Apparatus and methods for control of a light emitting device using power line communication
View Patent ↗A lighting apparatus includes a light emitting device that has an attribute that is adjustable responsive to a control signal carried on a power line from which the light emitting device receives an Alternating Current (AC) power signal.
1. A lighting apparatus comprising:
a light emitting device having an attribute that is adjustable responsive to a control signal carried on a power line from which the light emitting device receives an Alternating Current (AC) power signal;
wherein the light emitting device comprises a plurality of light-emitting diodes (LEDs) and wherein each of the plurality of LEDs has a receiver circuit associated therewith that is configured to decode an address associated with the respective LED; and
wherein the address is based on a frequency of the control signal.
2. The lighting apparatus of claim 1 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a luminance of the LED.
3. The lighting apparatus of claim 1 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a chromanicity of the LED.
4. The lighting apparatus of claim 1 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a red-green-blue (RGB) color of the LED.
5. The lighting apparatus of claim 1 , wherein the attribute comprises a first attribute and a second attribute and the control signal comprises a first control signal and a second control signal, the first attribute being adjustable responsive to the first control signal and the second attribute being adjustable responsive to the second control signal.
6. The lighting apparatus of claim 1 , wherein the light emitting device comprises a plurality of light-emitting diodes (LEDs) and wherein each of the plurality of light emitting diodes has an attribute that is adjustable responsive to the control signal.
7. The lighting apparatus of claim 6 , wherein the attribute of one of the plurality of LEDs is different from the attribute of another one of the plurality of LEDs.
8. The lighting apparatus of claim 1 , wherein the control signal is frequency modulated.
9. The lighting apparatus of claim 1 , wherein the control signal is amplitude modulated.
10. The lighting apparatus of claim 1 , wherein the control signal is phase modulated.
11. The lighting apparatus of claim 1 , wherein the control signal is pulse width modulated.
12. A method of operating a lighting apparatus, comprising:
transmitting a control signal on a power line that carries an Alternating Current (AC) power signal to adjust an attribute of a light emitting device that is responsive to the control signal;
wherein the light emitting device is a first light emitting device of a plurality of light emitting devices and wherein each of the plurality of light emitting devices has a receiver circuit associated therewith that is configured to decode address information associated with the respective light emitting device; and
wherein transmitting the control signal comprises:
transmitting the control signal on the power line to adjust the attribute of the first light emitting device, the control signal including the address information associated with the first light emitting device;
wherein the address information is based on a frequency of the control signal.
13. The method of claim 12 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a luminance of the LED.
14. The method of claim 12 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a chromanicity of the LED.
15. The method apparatus of claim 12 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a red-green-blue (RGB) color of the LED.
16. The method of claim 12 , further comprising:
receiving a user selection of the attribute.
17. The method of claim 12 , wherein the control signal is frequency modulated.
18. The method of claim 12 , wherein the control signal is amplitude modulated.
19. The method of claim 12 , wherein the control signal is phase modulated.
20. The method of claim 12 , wherein the control signal is pulse width modulated.
21. A circuit, comprising:
a control circuit that is configured to generate a control signal on a power line used to supply a light emitting device with an Alternating Current (AC) power signal, the control signal being configured to adjust an attribute of the light emitting device;
wherein the light emitting device is a first light emitting device of a plurality of light emitting devices and wherein each of the plurality of light emitting devices has a receiver circuit associated therewith that is configured to decode address information associated with the respective light emitting device:
wherein the control signal comprises the address information associated with the first light emitting device; and
wherein the address information is based on a frequency of the control signal.
22. The circuit of claim 21 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a luminance of the LED.
23. The circuit of claim 21 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a chromanicity of the LED.
24. The circuit of claim 21 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a red-green-blue (RGB) color of the LED.
25. The circuit of claim 21 , wherein the control signal is frequency modulated.
26. The circuit of claim 21 , wherein the control signal is amplitude modulated.
27. The circuit of claim 21 , wherein the control signal is phase modulated.
28. The circuit of claim 21 , wherein the control signal is pulse width modulated.
29. A method of operating a circuit, comprising:
generating a control signal on a power line used to supply a light emitting device with an Alternating Current (AC) power signal, the control signal being configured to adjust an attribute of the light emitting device;
wherein the light emitting device is a first light emitting device of a plurality of light emitting devices and wherein each of the plurality of light emitting devices has a receiver circuit associated therewith that is configured to decode address information associated with the respective light emitting device:
wherein the control signal comprises the address information associated with the first light emitting device; and
wherein the address information is based on a frequency of the control signal.
30. The method of claim 29 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a luminance of the LED.
31. The method of claim 29 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a chromanicity of the LED.
32. The method of claim 29 , wherein the light emitting device is a light-emitting diode (LED) and the attribute is a red-green-blue (RGB) color of the LED.
33. The method of claim 29 , wherein the control signal is frequency modulated.
34. The method of claim 29 , wherein the control signal is amplitude modulated.
35. The method of claim 29 , wherein the control signal is phase modulated.
36. The method of claim 29 , wherein the control signal is pulse width modulated.