Systems, methods, and devices for influencing spectral content of a light output

Patent metadata

Field	Value
Publication number	US-11240898-B2
Application number	US-202117173286-A
Country	US
Kind code	B2
Filing date	Feb 11, 2021
Priority date	Feb 12, 2020
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A method for control of a light fixture, the method including energizing the light fixture to produce a first light output with a first chromaticity and a first spectral power distribution, receiving a user input representative of a desired adjustment of a lighting effect, generating a target spectrum based on the user input, and energizing the light fixture to produce a second light output with the first chromaticity and a second spectral power distribution. The second power distribution approximates the target spectrum.

First claim

What is claimed is:

1. A method for control of a light fixture, the method comprising:
energizing the light fixture to produce a first light output with a first chromaticity and a first spectral power distribution;
receiving a user input representative of a desired adjustment of a lighting effect;
generating a target spectrum based on the user input; and
energizing the light fixture to produce a second light output with the first chromaticity and a second spectral power distribution, the second power distribution approximates the target spectrum.

2. The method of claim 1 , wherein the lighting effect is the TM-30 R g value of the light output.

3. The method of claim 1 , wherein the lighting effect is a hue shift of the light reflected by an object illuminated by the light output.

4. The method of claim 1 , wherein the lighting effect is a chroma shift of the light reflected by an object illuminated by the light output.

5. The method of claim 1 , wherein the lighting effect is a Television Lighting Consistency Index (“TLCI”) value of the light output.

6. The method of claim 1 , wherein the lighting effect is a Color Rendering Index (“CRI”) Ra value of the light output.

7. The method of claim 1 , wherein the lighting effect is a Spectral Similarity Index (“SSI”) value of the light output.

8. The method of claim 1 , wherein the lighting effect is the relative luminance of an object illuminated by the light output.

9. The method of claim 1 , wherein the first light has a first lumen output and the second light has a second lumen output equal to the first lumen output.

10. The method of claim 1 , wherein the first chromaticity is matched for a human eye observer.

11. The method of claim 1 , wherein the first chromaticity is matched for a camera observer.

12. The method of claim 1 , further including detecting reflected light off an object positioned in the second light output with a camera and adjusting the target spectrum based on the detected reflected light.

13. The method of claim 1 , wherein the first chromaticity is non-white color.

14. The method of claim 1 , wherein generating the target spectrum based on the user input includes retrieving the target spectrum from a table stored in a memory.

15. The method of claim 1 , wherein the lighting effect is the TM-30 R f value of the light output.

16. The method of claim 1 , wherein the lighting effect is the TM-30 R cs,h1 value of the light output.

17. The method of claim 1 , wherein the lighting effect is the TM-30 R f, h1 value of the light output.

18. A lighting control system comprising:
one or more light fixtures;
one or more driver circuits configured to provide drive signals to the one or more light fixtures;
a user interface configured to receive an input related to a light output of the one or more light fixtures, the input being representative of an adjustment of a lighting effect; and
a controller connected to the one or more driving circuits and the user interface, the controller including a processor and a memory, the controller configured to:
energize the one or more light fixtures to produce a first light output with a first chromaticity and a first spectral power distribution,
receive the input representative of the adjustment of the lighting effect,
generate a target spectrum based on the input, and
energize the one or more light fixtures to produce a second light output with the first chromaticity and a second spectral power distribution, the second power distribution approximates the target spectrum.

19. The lighting control system of claim 18 , wherein the first chromaticity is a non-white color.

20. A controller for controlling a light output of a light fixture, the controller including a non-transitory computer readable medium and a processor, the controller including computer executable instructions stored in the computer readable medium for controlling operation of the controller to:
energize the light fixture to produce a first light output with a first chromaticity and a first spectral power distribution;
receive an input representative of an adjustment of a lighting effect;
generate a target spectrum based on the user input; and
energize the light fixture to produce a second light output with the first chromaticity and a second spectral power distribution, the second power distribution approximates the target spectrum.

Assignees

• Electronic Theatre Controls Inc

Inventors

• Florac William R
• Gnam Evan
• Luedtke Wendy
• Uphoff James

Classifications

• H05B47/11 Primary

  by determining the brightness or colour temperature of ambient light · CPC title

• H05B47/14

  by determining electrical parameters of the light source · CPC title

• H05B47/125

  by using cameras · CPC title

• H05B45/22

  using optical feedback · CPC title

• H05B45/20 Primary

  Controlling the colour of the light · CPC title