System for optimizing light absorbance and associated methods

• US 9,408,275 B2
• Filed: 10/14/2014
• Issued: 08/02/2016
• Est. Priority Date: 12/02/2011
• Status: Active Grant

• Current Assignee: BioLogical Illumination, LLC
• Original Assignee: BioLogical Illumination, LLC
• Inventors: Maxik, Fredric S., Soler, Robert R., Bartine, David E., Grove, Eliza Katar, Yorio, Neil, Crawford, Anthony, Flickinger, Gregory
• Primary Examiner(s): Le, Tung X
• Application Number:
  US14/513,249
• Publication Number:
  US 20150061510A1
• Time in Patent Office: 658 Days
• Field of Search: 315149-159, 315/291, 315/297, 315/307, 315/312
• US Class Current: 1/1
• CPC Class Codes: A01G 7/045 with electric lighting
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/22 using optical feedback
• CPC Class Codes: H05B 47/10 Controlling the light source
• CPC Class Codes: Y02P 60/14 Measures for saving energy, e.g. in green houses

Abstract

A lighting system with adjustable wavelength output that may include a plurality of light sources, a controller positioned in electrical communication with the plurality of light sources, and an optical sensor system positioned in electrical communication with the controller. The controller may be configured to selectively operate each light source of the plurality of light sources to emit one or more source lights. The optical sensor system may be configured to sense a reflected light that is reflected by an object upon which the source lights are incident. The optical sensor system may be configured to sense a wavelength range of the reflected light defined as a measured wavelength range and may further be configured to transmit a signal to the controller responsive to the measured wavelength range. The controller may be configured to operate the plurality of light sources responsive to the signal received from the optical sensor system.

Claims

1. A lighting system with adjustable wavelength output comprising:

a plurality of light sources;

a controller positioned in electrical communication with the plurality of light sources; and

an optical sensor system positioned in electrical communication with the controller;

wherein the controller is configured to selectively operate each light source of the plurality of light sources to emit one or more source lights;

wherein the optical sensor system is configured to sense a reflected light that is reflected by an object upon which the source lights are incident;

wherein the optical sensor system is configured to sense a wavelength range of the reflected light defined as a measured wavelength range;

wherein the optical sensor system is configured to transmit a signal to the controller responsive to the measured wavelength range;

wherein the controller is configured to operate the plurality of light sources responsive to the signal received from the optical sensor system;

wherein the plurality of light sources comprises a plurality of light emitting diodes (LEDs); and

wherein at least one LED of the plurality of LEDs is configured to selectively operate between a sensing operation and an emitting operation, the sensing operation being defined by the at least one LED being configured to operate as the optical sensor system, and the emitting operation being defined by the at least one LED being configured to operate as a light source of the plurality of light sources.

2. The lighting system according to claim 1 further comprising an optic configured to combine the one or more source lights to be defined as a combined light.

3. The lighting system according to claim 2 wherein at east one of the optic and a light source of plurality of light sources comprises a color conversion layer;

wherein the color conversion layer is configured to receive a source light within a source light wavelength range and emit a converted light within a converted light wavelength range.

4. The lighting system according to claim 1 wherein the reflected light sensed by the optical sensor system is associated with the one or more source lights;

and wherein the controller is configured to reduce emission of the one or more source lights associated with the reflected light sensed by the optical sensor system.

5. The lighting system according to claim 1 wherein the measured wavelength range comprises at least one of 410-490 nm and 590-650 nm.

6. The lighting system according to claim 1 wherein the optical sensor system comprises an optical divider and an optical sensor;

wherein the optical divider is configured to divide the reflected light into a plurality of monochromatic wavelength ranges; and

wherein the optical sensor is configured to receive the plurality of monochromatic wavelength ranges.

7. The lighting system according to claim 1 wherein the optical sensor system comprises a plurality of monochromatic filters and an optical sensor;

wherein the optical sensor system is configured to cycle through the plurality of monochromatic filters;

wherein each of the monochromatic filters is configured to receive the reflected light and permit light within a wavelength range to pass therethrough, defined as a filtered light; and

wherein the optical sensor is configured to receive the filtered light from each of the monochromatic filters.

8. The lighting system according to claim 1 wherein the optical sensor system comprises at least one of a charge-coupled device (CCD) color sensor, a photomultiplier tube, a photodiode, and an avalanche photodiode (APD).

9. The lighting system according to claim 1 wherein the source light emitted by each light source of the plurality of light sources comprises a power intensity;

and wherein the controller is further configured to selectively operate each light source of the plurality of light sources to emit a source light having differing power intensities.

10. The lighting system according to claim 1 wherein the optical sensor system is configured to determine a baseline reflectance;

and wherein the controller is configured to selectively operate the plurality of light sources responsive to deviations of the reflected light that is sensed by the optical sensor system from the baseline reflectance.

11. The lighting system according to claim 1 wherein the one or more source lights each comprise a source light wavelength range;

wherein the controller is configured to identify a measured wavelength range that does not correspond to the source light wavelength range of the one or more source lights;

wherein the controller is configured to associate the measured wavelength range with at least one light source of the plurality of light sources; and

wherein the controller is configured to operate the plurality of light sources responsive to an indication of a reflected light comprising a wavelength range not associated with the wavelength range of the one or more source lights.

12. The lighting system according to claim 11 wherein the controller is configured to identify a source light of the one or more source lights that has undergone a wavelength conversion to a wavelength range defined as a converted wavelength range based on the light reflected from the object upon which the source light of the one or more source lights was incident defined as a converted reflected light;

and wherein the controller is configured to associate the light source that emits the source light resulting in the reflected light comprising the converted wavelength range with the converted reflected light.

13. A lighting system with adjustable wavelength output comprising:

a plurality of light emitting diodes (LEDs);

a controller positioned in electrical communication with the plurality of LEDs and configured to selectively operate each LED of the plurality of LEDs to emit one or more source lights;

an optical sensor system positioned in electrical communication with the controller; and

an optic configured to combine the one or more source lights to be defined as a combined light;

wherein the optical sensor system is configured to sense a reflected light that is reflected by an object upon which the source lights are incident;

wherein the optical sensor system is configured to sense a wavelength range of the reflected light defined as a measured wavelength range;

wherein the optical sensor system is configured to transmit a signal to the controller responsive to the measured wavelength range;

wherein the controller is configured to operate the plurality of LEDs responsive to the signal received from the optical sensor system;

wherein the reflected light sensed by the optical sensor system is associated with the one or more source lights;

wherein the controller is configured to reduce emission of the one or more source lights associated with the reflected light sensed by the optical sensor system;

wherein at least one LED of the plurality of LEDs is configured to selectively operate between a sensing operation and an emitting operation, the sensing operation being defined by the at least one LED being configured to operate as the optical sensor system, and the emitting operation being defined by the at least one LED being configured to operate as a light source of the plurality of LEDs;

wherein the one or more source lights each comprise a source light wavelength range;

wherein the controller is configured to identify a measured wavelength range that does not correspond to the source light wavelength range of the one or more source lights;

wherein the controller is configured to associate the measured wavelength range with at least one LED of the plurality of LEDs; and

wherein the controller is configured to operate the plurality of LEDs responsive to an indication of a reflected light comprising a wavelength range not associated with the wavelength range of the one or more source lights.

14. The lighting system according to claim 13 wherein the optical sensor system comprises an optical divider and an optical sensor;

wherein the optical divider is configured to divide the reflected light into a plurality of monochromatic wavelength ranges; and

wherein the optical sensor is configured to receive the plurality of monochromatic wavelength ranges.

15. The lighting system according to claim 13 wherein the optical sensor system comprises a plurality of monochromatic filters and an optical sensor;

wherein the optical sensor system is configured to cycle through the plurality of monochromatic filters;

wherein each of the monochromatic filters is configured to receive the reflected light and permit light within a wavelength range to pass therethrough, defined as a filtered light; and

wherein the optical sensor is configured to receive the filtered light from each of the monochromatic filters.

16. The lighting system according to claim 13 wherein the controller is configured to identify a source light of the one or more source lights that has undergone a wavelength conversion to a wavelength range defined as a converted wavelength range based on the light reflected from the object upon which the source light of the one or more source lights was incident defined as a converted reflected light;

and wherein the controller is configured to associate the LED that emits the source light resulting in the reflected light comprising the converted wavelength range with the converted reflected light.

17. A method of operating a lighting system comprising a plurality of light sources, a controller in electrical communication with the plurality of light sources, and an optical sensor in electrical communication with the controller, the method comprising:

selectively operating each light of the plurality of light sources to emit a source light;

sensing a reflected light that is reflected by an object upon which the source light is incident;

sensing a wavelength range of the reflected light defined as a measured wavelength range;

transmitting a signal to the controller responsive to the measured wavelength range;

operating the plurality of light sources responsive to the signal received from the optical sensor system;

identifying a measured wavelength range that does not correspond to the source light wavelength range of the one or more source lights;

associating the measured wavelength range with at least one light source of the plurality of light sources; and

operating the plurality of light sources responsive to an indication of a reflected light comprising a wavelength range not associated with the wavelength range of the one or more source lights.

18. The method according to claim 17 further comprising combining the one or more source lights to be defined as a combined light.

19. The method according to claim 17 wherein the reflected light sensed by the optical sensor system is associated with the one or more source lights;

and further comprising reducing emission of the one or more source lights associated with the reflected light sensed by the optical sensor system.

20. The method according to claim 17 further comprising determining a baseline reflectance and selectively operating the plurality of light sources responsive to deviations of the reflected light from the baseline reflectance.

21. The method according to claim 17 further comprising:

identifying a source light of the one or more source lights that has undergone a wavelength conversion to a wavelength range defined as a converted wavelength range based on the light reflected from the object upon which the source light of the one or more source lights was incident defined as a converted reflected light; and

associating the light source that emits the source light resulting in the reflected light comprising the converted wavelength range with the converted reflected light.