LIGHTING APPARATUS AND METHODS USING RECONFIGURABLE DIMMING MAPPING

• US 20140265922A1
• Filed: 03/14/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Walters, Michael, Gilliom, Michael Burbank, Keiter, Douglas E., Liu, Danwei
• Granted Patent: US 9,288,863 B2
• Time in Patent Office: Days
• US Class Current: 315/297
• CPC Class Codes: H05B 45/14 using electrical feedback from LEDs or from LED modules

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.

Claims

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.

2. The lighting apparatus of claim 1, wherein the mapping is configurable using circuit component selection.

3. The lighting apparatus of claim 2, 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.

4. The lighting apparatus of claim 2, wherein the component selection comprises a selection from a plurality of candidate components present in the driver circuit.

5. The lighting apparatus of claim 2, wherein the component selection comprises a component replacement in the driver circuit.

6. The lighting apparatus of claim 2, wherein the component selection supports linear and nonlinear mapping with a single component selection.

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

8. The lighting apparatus of claim 7, 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.

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

10. The lighting apparatus of claim 7, wherein the data input comprises at least one parameter of a mathematical function that relates the dimming signal to light intensity.

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

12. The lighting apparatus of claim 9, 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.

13. The lighting apparatus of claim 12, wherein the dimming mapping circuit comprises a reconfigurable analog filter circuit configured to generate the second dimming signal.

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

15. The lighting apparatus of claim 12, wherein the dimming mapping circuit comprises a reconfigurable delta-sigma converter configured to generate the second dimming signal.

16. The lighting apparatus of claim 12, 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.

19. The lighting apparatus of claim 16, 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.

17. 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.

18. The apparatus of claim 17, wherein the mapping is configurable using circuit component selection, a control signal and/or a data input.

20. 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.

21. The apparatus of claim 20, wherein the mapping is configurable using circuit component selection, a control signal and/or a data input.

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