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

Patent metadata

Field	Value
Publication number	US-11849519-B2
Application number	US-202217583765-A
Country	US
Kind code	B2
Filing date	Jan 25, 2022
Priority date	Feb 12, 2020
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

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 lighting control system comprising:
one or more light sources;
one or more driver circuits configured to provide drive signals to the one or more light sources;
an interface configured to receive an input related to a light output of the one or more light sources, the input being related to an adjustment of a lighting effect; and
a controller connected to the one or more driving circuits and the interface, the controller including a processor and a memory, the controller configured to:
control the one or more light sources to produce a first light output with a first chromaticity and a first spectral power distribution,

receive the input related to the adjustment of the lighting effect,
generate a target spectrum based on the input, and
control the one or more light sources to produce a second light output with the first chromaticity and a second spectral power distribution, the second power distribution approximating the target spectrum.

2. The lighting control system of claim 1 , wherein the first chromaticity is a non-white color.

3. The lighting control system of claim 1 , wherein the interface includes a selection mechanism for selecting a value for the lighting effect.

4. The lighting control system of claim 3 , wherein the value for the lighting effect can have a positive value or a negative value.

5. The lighting control system of claim 4 , wherein the positive value corresponds to oversaturation and the negative value corresponds to undersaturation.

6. The lighting control system of claim 1 , wherein the one or more light sources include one or more chip-on-board (“COB”) light sources.

7. The lighting control system of claim 1 , further comprising:
a camera configured to detect light from the one or more light sources that is reflected off of an object.

8. The lighting control system of claim 7 , wherein the camera is a spectrometer.

9. The lighting control system of claim 7 , wherein the target spectrum is modified based on the light that is reflected off of the object.

10. The lighting control system of claim 1 , wherein the lighting effect is one selected from the group consisting of: the TM-30 R g value of the light output, a hue shift of the light reflected by an object illuminated by the light output, a chroma shift of the light reflected by an object illuminated by the light output, a Television Lighting Consistency Index (“TLCI”) value of the light output, a Color Rendering Index (“CRI”) Ra value of the light output, a Spectral Similarity Index (“SSI”) value of the light output, the relative luminance of an object illuminated by the light output, the TM-30 R f value of the light output, the TM-30 R cs,h1 value of the light output, and the TM-30 R f,h1 value of the light output.

11. A method for controlling a light source, the method comprising:
controlling the light source to produce a first light output with a first chromaticity and a first spectral power distribution;
receiving an input related to a desired adjustment of a lighting effect;
generating a target spectrum based on the input; and
controlling the light source to produce a second light output with the first chromaticity and a second spectral power distribution, the second power distribution approximating the target spectrum.

12. The method of claim 11 , wherein the first light output has a first lumen output and the second light output has a second lumen output equal to the first lumen output.

13. The method of claim 11 , further comprising:
receiving, via a selection mechanism of the interface, a value for the lighting effect.

14. The method of claim 13 , wherein the value for the lighting effect can have a positive value or a negative value.

15. The method of claim 14 , wherein the positive value corresponds to oversaturation and the negative value corresponds to undersaturation.

16. The method of claim 11 , further comprising:
detect light from the one or more light sources that is reflected off of an object; and
modifying the target spectrum based on the light that is reflected off of the object.

17. The method of claim 11 , wherein generating the target spectrum based on the input includes retrieving the target spectrum from a table stored in a memory.

18. The method of claim 11 , wherein the lighting effect is one selected from the group consisting of: the TM-30 R g value of the light output, a hue shift of the light reflected by an object illuminated by the light output, a chroma shift of the light reflected by an object illuminated by the light output, a Television Lighting Consistency Index (“TLCI”) value of the light output, a Color Rendering Index (“CRT”) Ra value of the light output, a Spectral Similarity Index (“SST”) value of the light output, the relative luminance of an object illuminated by the light output, the TM-30 R f value of the light output, the TM-30 R cs,h1 value of the light output, and the TM-30 R f,h1 value of the light output.

19. A controller for controlling a light output of a light source, 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:
control the light source to produce a first light output with a first chromaticity and a first spectral power distribution;
receive an input related to an adjustment of a lighting effect;
generate a target spectrum based on the input; and
control the light source to produce a second light output with the first chromaticity and a second spectral power distribution, the second power distribution approximating the target spectrum.

20. The controller of claim 19 , the controller further including computer executable instructions stored in the computer readable medium for controlling operation of the controller to:
receive, via a selection mechanism of an interface, a value for the lighting effect.

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

• H05B45/20 Primary

  Controlling the colour of the light · CPC title

• H05B45/22

  using optical feedback · CPC title

• H05B47/125

  by using cameras · CPC title

• H05B47/14

  by determining electrical parameters of the light source · CPC title