Low-angle thoroughfare surface lighting device

• US 8,899,776 B2
• Filed: 04/23/2013
• Issued: 12/02/2014
• Est. Priority Date: 05/07/2012
• 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: Widjaja, Addy S., Maxik, Fredric S., Bartine, David E., Soler, Robert R., Zhou, Ran, Schellack, James Lynn, Oostdyk, Mark Andrew
• Primary Examiner(s): Santiago, Mariceli
• Application Number:
  US13/868,880
• Publication Number:
  US 20140111966A1
• Time in Patent Office: 588 Days
• Field of Search: 362/153, 362/153.1, 340/815.49, 340/815.73, 340/815.74, 404 9- 16
• US Class Current: 362/153.1
• CPC Class Codes: F21S 8/032 the surface being a floor or like ground surface, e.g. pavement
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 5/02 of prismatic shape F21V5/04 takes precedence
• CPC Class Codes: F21V 5/10 comprising photoluminescent material
• CPC Class Codes: F21W 2111/023 for pedestrian walkways

Abstract

A lighting device may include a housing configured to be attached to a thoroughfare surface. The housing may include a top surface, a proximal face, a distal face, and first and second sidewalls extending between the proximal face and the distal face. Circuitry may be carried by the housing. A first primary optic may be carried by the housing adjacent the first sidewall to define a first optical chamber, and a first light source may be positioned within the first optical chamber and carried by the housing adjacent the first sidewall. The first sidewall may have a first slanted section, and an axis of the first slanted section may skew to a longitudinal axis of the lighting device.

Claims

1. A lighting device comprising:

a housing configured to be attached to a thoroughfare surface, the housing comprising a top surface, a proximal face, a distal face, and first and second sidewalls extending between the proximal face and the distal face and extending downwardly from the top surface;

circuitry carried by the housing;

a first primary optic carried by the housing adjacent the first sidewall to define a first optical chamber; and

a first light source positioned within the first optical chamber and carried by the housing adjacent the first sidewall;

wherein the circuitry is electrically coupled to the first light source;

wherein the first sidewall comprises a first slanted section;

wherein an axis of the first slanted section is skew to a longitudinal axis of the lighting device; and

wherein the first primary optic is configured to direct light outward and in a direction away from at least one of the first sidewall and the first slanted section.

2. A lighting device according to claim 1 wherein light emitted from the first light source is directed through the first primary optic within a range from about parallel to the longitudinal axis of the lighting device in the direction of the distal face to about perpendicular to the longitudinal axis of the lighting device.

3. A lighting device according to claim 1 further comprising:

a second primary optic carried by the housing adjacent the second sidewall to define a second optical chamber; and

a second light source positioned within the second optical chamber and carried by the housing adjacent the second sidewall;

wherein the second sidewall comprises a second slanted section;

wherein an axis of the second slanted section is skew to the longitudinal axis of the lighting device; and

wherein the second primary optic is configured to direct light outward and in a direction away from at least one of the second sidewall and the second slanted section.

4. A lighting device according to claim 3 wherein light emitted from the second light source is directed through the second primary optic within a range from about parallel to the longitudinal axis of the lighting device in the direction of at least one of the proximal face and the distal face to about perpendicular to the longitudinal axis of the lighting device.

5. A lighting device according to claim 1 wherein the first primary optic is a first prismatic lens.

6. A lighting device according to claim 5 wherein the first prismatic lens comprises a color conversion layer configured to receive a source light within a source light wavelength range from the first light source and to emit a converted light within a converted wavelength range.

7. A lighting device according to claim 1 further comprising a first secondary optic carried by the housing positioned such that the first primary optic is intermediate the first secondary optic and the first light source.

8. A lighting device according to claim 7 wherein the first secondary optic comprises a color conversion layer configured to receive a source light within a source light wavelength range from the first light source and to emit a converted light within a converted wavelength range.

9. A lighting device according to claim 1 further comprising an ambient light sensor carried by the housing.

10. A lighting device according to claim 9 wherein the ambient light sensor is at least one of a photodiode device, a phototransistor device, a photovoltaic device, and a photomultiplier device.

11. A lighting device according to claim 1 further comprising a power generating element carried by the housing and being at least one of a photovoltaic device, a piezoelectric device, and a thermoelectric device.

12. A lighting device according to claim 11 further comprising:

a driver circuit electrically coupled to the power generating element, the first light source, and a microcontroller; and

a battery electrically coupled to the power generating element;

wherein the power generating element is configured to produce electrical power that is stored by the battery; and

wherein at least one of the first light source and the microcontroller are configured to operate using electrical power drawn from the driver circuit.

13. A lighting device according to claim 1 wherein the driver circuit is electrically coupled to an external power source.

14. A lighting device according to claim 1 wherein at least one of the first and second sidewalls and the first slanted section is at least one of curved, slanted, partially curved, and partially slanted.

15. A lighting device according to claim 1 further comprising:

a communication device;

a microcontroller; and

a traffic sensor;

wherein the traffic sensor is configured to generate data regarding traffic in the environment surrounding the lighting device; and

wherein the communication device is configured to transmit the data generated by the traffic sensor across a network.

16. A lighting device according to claim 1 wherein the first light source comprises a light emitting diode (LED).

17. A lighting device according to claim 1 further comprising a heat sink carried by the housing and comprising a plurality of fins.

18. A lighting device comprising:

a housing configured to be attached to a thoroughfare surface, the housing comprising a top surface, a proximal face, a distal face, and first and second sidewalls extending between the proximal face and the distal face and extending downwardly from the top surface;

circuitry carried by the housing;

a first primary optic carried by the housing adjacent the first sidewall to define a first optical chamber; and

a first light source positioned within the first optical chamber and carried by the housing adjacent the first sidewall;

a second primary optic carried by the housing adjacent the second sidewall to define a second optical chamber; and

a second light source positioned within the second optical chamber and carried by the housing adjacent the second sidewall;

wherein the circuitry is electrically coupled to the first light source;

wherein the first sidewall comprises a first slanted section;

wherein the second sidewall comprises a second slanted section;

wherein an axis of the first slanted section is skew to a longitudinal axis of the lighting device;

wherein the first primary optic is configured to direct light outward and in a direction away from at least one of the first sidewall and the first slanted section;

wherein an axis of the second slanted section is skew to the longitudinal axis of the lighting device; and

wherein the second primary optic is configured to direct light outward and in a direction away from at least one of the second sidewall and the second slanted section.

19. A lighting device according to claim 18 wherein light emitted from the first light source is directed through the first primary optic within a range from about parallel to the longitudinal axis of the lighting device in the direction of the distal face to about perpendicular to the longitudinal axis of the lighting device.

20. A lighting device comprising:

a housing configured to be attached to a thoroughfare surface, the housing comprising a top surface, a proximal face, a distal face, and first and second sidewalls extending between the proximal face and the distal face and extending downwardly from the top surface;

circuitry carried by the housing;

a first primary optic carried by the housing adjacent the first sidewall to define a first optical chamber;

a first secondary optic carried by the first sidewall and positioned in optical communication with the first primary optic;

a first light source positioned within the first optical chamber and carried by the housing adjacent the first sidewall;

a second primary optic carried by the housing adjacent the second sidewall to define a second optical chamber;

a second secondary optic carried by the second sidewall and positioned in optical communication with the second primary optic; and

a second light source positioned within the second optical chamber and carried by the housing adjacent the second sidewall;

wherein the first primary optic is a first prismatic lens;

wherein the second primary optic is a second prismatic lens;

wherein the circuitry is electrically coupled to the first light source;

wherein the first sidewall comprises a first slanted section;

wherein the second sidewall comprises a second slanted section;

wherein an axis of the first slanted section is skew to a longitudinal axis of the lighting device;

wherein the first primary optic is configured to direct light outward and in a direction away from at least one of the first sidewall and the first slanted section;

wherein an axis of the second slanted section is skew to the longitudinal axis of the lighting device;

wherein the second primary optic is configured to direct light outward and in a direction away from at least one of the second sidewall and the second slanted section;

wherein the first secondary optic provides a fluid seal between the first secondary optic and the housing; and

wherein the second secondary optic provides a fluid seal between the second secondary optic and the housing.

21. A lighting device according to claim 20 wherein light emitted from the first light source is directed through the first primary optic within a range from about parallel to the longitudinal axis of the lighting device in the direction of the distal face to about perpendicular to the longitudinal axis of the lighting device and wherein light emitted from the second light source is directed through the second primary optic within a range from about parallel to the longitudinal axis of the lighting device in the direction of at least one of the proximal face and the distal face to about perpendicular to the longitudinal axis of the lighting device.