Color tunable light with zone control

• US 10,306,728 B2
• Filed: 04/25/2018
• Issued: 05/28/2019
• Est. Priority Date: 05/31/2017
• Status: Active Grant

• Current Assignee: Cineo Lighting, Inc. (Comcast Corporation), NBC Universal Media LLC (Comcast Corporation)
• Original Assignee: Cineo Lighting, Inc. (Comcast Corporation), NBC Universal Media LLC (Comcast Corporation)
• Inventors: Crosbie, James, Edwards, Charles, Pierceall, Richard
• Primary Examiner(s): Hammond, Crystal L
• Application Number:
  US15/962,795
• Publication Number:
  US 20180352629A1
• Time in Patent Office: 398 Days
• Field of Search: None
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21S 2/00 Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
• CPC Class Codes: F21V 19/009 the support means engaging the vessel of the source
• CPC Class Codes: F21V 21/0816 Strap fasteners, e.g. fasteners with a buckle
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21W 2131/406 for theatres, stages or film studios
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2113/17 forming a single encapsulated light source
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

A lighting system and method features full gamut color and white color correlated temperature (CCT) control of independently controlled zones. Each zone may be tuned to any color and/or white CCT. The result is a lighting system and method with a light-emitting face having zones of different colors and intensities that may be independently controlled in real time. The lighting system and method enables improved lighting effects for film, television, and still photography as compared to traditional panel lights that are uniform in color over the entire emission surface.

Claims

1. A lighting system, comprising:

a tunable array of zonal lighting devices providing a plurality of lighting zones, wherein each zonal lighting device corresponds to an independent lighting zone and each zonal lighting device is configured for independent color control and independent white color correlated temperature (CCT) control; and

a controller configured to;

receive one or more commands to implement one or more zone adjustments, wherein the one or more commands comprise;

an indication of the independent lighting zone of the plurality of lighting zones to adjust; and

an indication of a zone-specific white CCT value independent from one or more color values, wherein the zone-specific white CCT value corresponds to a CCT value of a camera sensor; and

control the plurality of lighting zones by providing one or more zone control signals, corresponding to the one or more commands, to the tunable array of zonal lighting devices to implement the one or more zone adjustments.

2. The lighting system of claim 1, wherein each zonal lighting device comprises a plurality of light-emitting diode (LED) clusters distributed linearly across each zonal light device, and wherein each LED cluster comprises at least two different white LEDs, one or more red LEDs, one or more green LEDs, and one or more blue LEDs.

3. The lighting system of claim 1, wherein the one or more zone adjustments implement a lighting effect associated with one or more objects, wherein the lighting effect comprises a simulated motion of a first object in the presence of the one or more objects, or vice versa, and wherein the one or more objects comprise a natural outdoor light, vehicle headlights, a building light, a street light, or a combination thereof.

4. The lighting system of claim 1, wherein the one or more commands are received from a user interface, and wherein the one or more commands indicate the zone-specific white CCT value, a zone-specific red light intensity value, a zone-specific green light intensity value, and a zone-specific blue light intensity value.

5. The lighting system of claim 4, wherein the controller is configured to provide the one or more zone control signals based on RGB logic by determining a zone-specific white-reduced light intensity value based on the zone-specific red light intensity value, the zone-specific green light intensity value, and the zone-specific blue light intensity value.

6. The lighting system of claim 5, wherein the controller is further configured to determine the zone-specific white-reduced light intensity value by determining a lowest value among the zone-specific red light intensity value, the zone-specific green light intensity value, and the zone-specific blue light intensity value, and wherein the lowest value corresponds to the zone-specific white-reduced light intensity value.

7. The lighting system of claim 6, wherein the controller is further configured to provide the one or more zone control signals based on the RGB logic by:

calculating a zone-specific white-reduced red light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific red light intensity value;

calculating a zone-specific white-reduced green light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific green light intensity value; and

calculating a zone-specific white-reduced blue light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific blue light intensity value.

8. The lighting system of claim 7, wherein the one or more zone control signals provided based on the RGB logic comprises:

a first signal based on the calculated zone-specific white-reduced red light intensity value;

a second signal based on the calculated zone-specific white-reduced green light intensity value;

a third signal based on the calculated zone-specific white-reduced blue light intensity value; and

a fourth signal based on the zone-specific white-reduced light intensity value.

9. A non-transitory computer readable medium comprising code to:

receive one or more commands to implement one or more zone adjustments to a lighting system, wherein the lighting system comprises a tunable array of zonal lighting devices providing a plurality of lighting zones, wherein each zonal lighting device corresponds to an independent lighting zone and each zonal lighting device is configured for independent color control and independent white color correlated temperature (CCT) control, and wherein the one or more commands comprise;

an indication of an independent lighting zone of the plurality of lighting zones to adjust; and

an indication of a zone-specific white CCT value independent from one or more color values, wherein the zone-specific white CCT value corresponds to a CCT value of a camera sensor; and

control the plurality of lighting zones by providing one or more zone control signals, corresponding to the one or more commands, to the tunable array of zonal lighting devices to implement the one or more zone adjustments.

10. The non-transitory computer readable medium of claim 9, wherein the one or more commands are received from a user interface, and wherein the one or more commands indicate the zone-specific white CCT value, a zone-specific red light intensity value, a zone-specific green light intensity value, and a zone-specific blue light intensity value.

11. The non-transitory computer readable medium of claim 10, further comprising code to provide the one or more zone control signals based on RGB logic by determining a zone-specific white-reduced light intensity value based on the zone-specific red light intensity value, the zone-specific green light intensity value, and the zone-specific blue light intensity value.

12. The non-transitory computer readable medium of claim 11, further comprising code to determine the zone-specific white-reduced light intensity value by determining a lowest value among the zone-specific red light intensity value, the zone-specific green light intensity value, and the zone-specific blue light intensity value, and wherein the lowest value corresponds to the zone-specific white-reduced light intensity value.

13. The non-transitory computer readable medium of claim 12, wherein the code to provide the one or more zone control signals based on the RGB logic comprises code to:

calculating a zone-specific white-reduced red light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific red light intensity value;

calculating a zone-specific white-reduced green light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific green light intensity value; and

calculating a zone-specific white-reduced blue light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific blue light intensity value.

14. The non-transitory computer readable medium of claim 13, wherein the one or more zone control signals provided based on the RGB logic comprises:

a first signal based on the calculated zone-specific white-reduced red light intensity value;

a second signal based on the calculated zone-specific white-reduced green light intensity value;

a third signal based on the calculated zone-specific white-reduced blue light intensity value; and

a fourth signal based on the zone-specific white-reduced light intensity value.

15. A lighting method, comprising:

receiving one or more commands to implement one or more zone adjustments of a lighting system, wherein the lighting system comprises a tunable array of zonal lighting devices providing a plurality of lighting zones, wherein each zonal lighting device corresponds to an independent lighting zone and each zonal lighting device is configured for independent color control and independent white color correlated temperature (CCT) control, and wherein the one or more commands comprise;

an indication of the independent lighting zone of the plurality of lighting zones to adjust; and

an indication of a zone-specific white CCT value independent from one or more color values, wherein the zone-specific white CCT value corresponds to a CCT value of a camera sensor; and

implementing the one or more zone adjustments by controlling the plurality of lighting zones of the tunable array of zonal lighting devices.

16. The lighting method of claim 15, wherein implementing the one or more zone adjustments of the lighting system comprises identifying the zone-specific white CCT value, a zone-specific red light intensity value, a zone-specific green light intensity value, and a zone-specific blue light intensity value.

17. The lighting method of claim 16, further comprising determining a zone-specific white-reduced light intensity value based on the zone-specific red light intensity value, the zone-specific green light intensity value, and the zone-specific blue light intensity value.

18. The lighting method of claim 17, wherein determining the zone-specific white-reduced light intensity value comprises determining a lowest value among the zone-specific red light intensity value, the zone-specific green light intensity value, and the zone-specific blue light intensity value, and wherein the lowest value corresponds to the zone-specific white-reduced light intensity value.

19. The lighting method of claim 18, further comprising:

calculating a zone-specific white-reduced red light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific red light intensity value;

calculating a zone-specific white-reduced green light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific green light intensity value; and

calculating a zone-specific white-reduced blue light intensity value by subtracting the zone-specific white-reduced light intensity value from the zone-specific blue light intensity value.

20. The lighting method of claim 19, wherein implementing the one or more zone adjustments comprises:

adjusting a red light intensity value to the zone-specific white-reduced red light intensity value;

adjusting a green light intensity value to the zone-specific white-reduced green light intensity value;

adjusting a blue light intensity value to the zone-specific white-reduced blue light intensity value; and

adjusting a white CCT value to the zone-specific white CCT value.