SUSTAINABLE OUTDOOR LIGHTING SYSTEM

• US 20100277097A1
• Filed: 05/01/2009
• Published: 11/04/2010
• Est. Priority Date: 05/01/2009
• Status: Active Grant

• Current Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Original Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Inventors: Maxik, Fredric S.
• Granted Patent: US 8,308,318 B2
• Time in Patent Office: Days
• US Class Current: 315/294
• 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: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

A method of generating light involves energizing one or more first light emitting elements thereby generating primary illumination of a first wavelength range over a target area, and energizing one or more second light emitting elements thereby generating secondary illumination of a second wavelength range toward the target area during a critical period. Both the primary illumination and the secondary illumination are combined within at least a portion of the target area thereby enhancing at least one visual property within the at least a portion of the target area.

Claims

1. A method of generating light, the method comprising the steps of:

energizing one or more first light emitting elements thereby generating primary illumination of a first wavelength range over a target area;

energizing one or more second light emitting elements thereby generating secondary illumination of a second wavelength range toward the target area during a critical period; and

combining both the primary illumination and the secondary illumination within at least a portion of the target area thereby enhancing at least one visual property within the at least a portion of the target area.

2. The method of claim 1, wherein the first wavelength range extends from 560 nm to 610 mm.

3. The method of claim 1, wherein the second wavelength range extends from either 500 nm to 550 nm or from 610 nm to 660 nm.

4. The method of claim 1, wherein the at least one visual property comprises at least one of:

color temperature, color rendering, depth perception, and night vision.

5. The method of claim 1, wherein the critical period is defined by an event comprising at least one of:

activation of a motion sensor, activation of an occupancy sensor, attaining a specified ambient light threshold level, manual activation, and automated activation at a preselected time interval.

6. The method of claim 1, wherein the one or more first light emitting elements and the one or more second light emitting elements are disposed within a first light fixture.

7. The method of claim 1, wherein the one or more first light emitting elements are disposed within a first light fixture and the one or more second light emitting elements are disposed within a second light fixture.

8. The method of claim 1, wherein the one or more first light emitting elements comprise one or more light emitting diodes emitting the first wavelength range and the one or more second light emitting elements comprise one or more light emitting diodes emitting the second wavelength range.

9. The method of claim 8, wherein the one or more first light emitting diodes and the one or more second light emitting diodes each comprise at least one of:

one or more phosphor-conversion light emitting diodes and one or more monochromatic light emitting diodes.

10. A system for generating light, the system comprising:

one or more first light emitting elements configured to generate primary illumination of a first wavelength range over a target area; and

one or more second light emitting elements configured to generate secondary illumination of a second wavelength range toward the target area during a critical period;

wherein both the primary illumination and the secondary illumination are combinable within at least a portion of the target area thereby enhancing at least one visual property within the at least a portion of the target area.

11. The system of claim 10, wherein the first wavelength range extends from 560 nm to 610 nm.

12. The system of claim 10, wherein the second wavelength range extends from 500 nm to 550 nm.

13. The system of claim 10, wherein the second wavelength range extends from 610 nm to 660 nm.

14. The system of claim 10, wherein the at least one visual property comprises at least one of:

color temperature, color rendering, depth perception, and night vision.

15. The system of claim 10, wherein the critical period is defined by an event comprising at least one of:

activation of a motion sensor, activation of an occupancy sensor, attaining a specified ambient light threshold level, manual activation, and automated activation at a preselected time interval.

16. The system of claim 10, wherein the one or more first light emitting elements and the one or more second light emitting elements are disposed within a first light fixture.

17. The system of claim 10, wherein the one or more first light emitting elements are disposed within a first light fixture and the one or more second light emitting elements are disposed within a second light fixture.

18. The system of claim 10, wherein the one or more first light emitting elements comprise one or more light emitting diodes emitting the first wavelength range and the one or more second light emitting elements comprise one or more light emitting diodes emitting the second wavelength range.

19. The system of claim 18, wherein the one or more first light emitting elements and the one or more second light emitting element each comprise at least one of:

one or more phosphor-conversion light emitting diodes and one or more monochromatic light emitting diodes.

20. A system for generating light, the system comprising:

one or more first light emitting diodes for generating primary illumination of a first wavelength range over a target area, wherein the first wavelength range extends from 560 nm to 610 nm; and

one or more second light emitting diodes for generating secondary illumination of a second wavelength range toward the target area during a critical period, wherein the second wavelength range extends from 500 nm to 550 nm or from 610 nm to 660 nm, and the critical period is defined by an event comprising at least one of;

activation of a motion sensor, activation of an occupancy sensor, attaining a specified ambient light threshold level, manual activation, and automated activation at a preselected time interval;

wherein both the primary illumination and the secondary illumination are combinable within at least a portion of the target area thereby enhancing at least one visual property within the at least a portion of the target area, wherein the at least one visual property comprises at least one of;

color temperature, color rendering, depth perception, and night vision.