Lighting apparatus and methods using reconfigurable dimming mapping

Patent metadata

Field	Value
Publication number	US-9288863-B2
Application number	US-201313826401-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 14, 2013
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A lighting apparatus includes at least one light emitting device and a reconfigurable driver circuit configured to drive the at least one light emitting device with an intensity that varies responsive to a dimming signal according to an adjustable mapping of the dimming signal to output of the light emitting device. In some embodiments, the mapping may be configurable using circuit component selection. In further embodiments, the mapping may be provided by a data input.

First claim

What is claimed is:

1. A lighting apparatus, comprising:
at least one light emitting device; and
a reconfigurable driver circuit configured to drive the at least one light emitting device with an intensity that varies responsive to a dimming signal according to an adjustable mapping of the dimming signal to output of the light emitting device,
wherein the mapping is configurable using circuit component selection, and
wherein the includes selection among linear and nonlinear circuit components.

2. The lighting apparatus of claim 1 , wherein the driver circuit comprises an analog filter that provides the mapping and wherein the mapping is configurable by selection of a component of the analog filter.

3. The lighting apparatus of claim 1 , wherein the component selection comprises a selection from a plurality of candidate components present in the driver circuit.

4. The lighting apparatus of claim 1 , wherein the component selection comprises a component replacement in the driver circuit.

5. The lighting apparatus of claim 1 , wherein the mapping is configurable using a data input.

6. The lighting apparatus of claim 5 , wherein the driver circuit comprises a processor configured to control dimming of the at least one light emitting device, and wherein the data input comprises a data input for the processor.

7. The lighting apparatus of claim 5 , wherein the data input comprises a lookup table.

8. The lighting apparatus of claim 5 , wherein the data input comprises at least one parameter of a mathematical function that relates the dimming signal to light intensity.

9. The lighting apparatus of claim 7 , wherein the at least one parameter comprises at least one value of the mathematical function and/or a coefficient of the mathematical function.

10. The lighting apparatus of claim 7 , wherein the reconfigurable driver circuit comprises:
a reconfigurable dimming mapping circuit configured to receive a first dimming signal and to generate a second dimming signal according to the adjustable mapping; and
a driver circuit configured to receive the second dimming signal and to vary illumination intensity of the at least one light emitting device responsive thereto.

11. The lighting apparatus of claim 10 , wherein the dimming mapping circuit comprises a reconfigurable analog filter circuit configured to generate the second dimming signal.

12. The lighting apparatus of claim 10 , wherein the dimming mapping circuit comprises a processor circuit configured to generate the second dimming signal.

13. The lighting apparatus of claim 10 , wherein the dimming mapping circuit comprises a reconfigurable delta-sigma converter configured to generate the second dimming signal.

14. The lighting apparatus of claim 10 , wherein the first dimming signal comprises a phase cut dimming signal and wherein the dimming mapping circuit comprises:
an average circuit configured to receive the phase cut dimming signal and to generate an average signal therefrom; and
a reconfigurable mapping circuit configured to receive the average signal and to generate the second dimming signal therefrom according to the adjustable mapping.

15. An apparatus comprising:
an input configured to receive a dimming signal;
an output configured to be coupled to at least one lighting device; and
a reconfigurable driver circuit coupled to the output and configured to drive the at least one light emitting device with an intensity that varies responsive to the dimming signal according to an adjustable mapping.

16. The apparatus of claim 15 , wherein the mapping is configurable using circuit component selection, a control signal and/or a data input.

17. The lighting apparatus of claim 14 , wherein the reconfigurable driver circuit comprises:
a reconfigurable dimming mapping circuit configured to receive a first dimming signal and to generate a second dimming signal according to the adjustable mapping; and
a driver circuit configured to receive the second dimming signal and to vary illumination intensity of the at least one light emitting device responsive thereto.

18. An apparatus comprising:
an input configured to receive a dimming signal;
an output configured to be coupled to at least one lighting device; and
a reconfigurable dimming mapping circuit coupled to the output and configured apply an adjustable mapping to the received dimming signal to provide a remapped dimming signal to the at least one lighting device.

19. The apparatus of claim 18 , wherein the mapping is configurable using circuit component selection, a control signal and/or a data input.

20. The apparatus of claim 18 , configured as a module configured to interface a dimmer to the at least one lighting device.

Assignees

• Cree Inc

Inventors

• Gilliom Michael Burbank
• Keiter Douglas E
• Liu Danwei
• Walters Michael

Classifications

• H05B45/14 Primary

  using electrical feedback from LEDs or from LED modules · CPC title

• H05B33/0848 Primary

  Electricity · mapped topic