Multi-tiered lighting system

Patent metadata

Field	Value
Publication number	US-9255677-B2
Application number	US-201213609886-A
Country	US
Kind code	B2
Filing date	Sep 11, 2012
Priority date	Sep 11, 2012
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

The present disclosure relates to a multi-tiered lighting system that has a pole and at least two light sources. A first light source is mounted to the pole at a first height, and a second light source is mounted to the pole at a second height that is substantially different than the first height. The first light source is configured to project a first beam of light that primarily lights up a first portion of a target coverage area, and the second light source is configured to project a beam of light that primarily lights up a second portion of the target coverage area, which is different from the first target coverage area. The first beam of light may spill onto the second target area, and the second beam of light may spill onto the first target area.

First claim

What is claimed is:

1. A luminaire comprising:
a pole;
a first light source mounted at a primary mounting height to the pole where the first light source is configured to project a primary beam of light that primarily lights up a first portion of a target coverage area that is substantially perpendicular to the pole; and
a second light source mounted at a secondary mounting height to the pole, wherein the second light source is configured to project a secondary beam of light that primarily lights up a second portion of the target coverage area, which is different from the first target coverage area and the primary mounting height is substantially higher than the secondary mounting height and the first and second light sources are LED-based light sources.

2. The luminaire of claim 1 wherein projected light within a beam angle for the primary beam of light substantially covers the first portion of the target coverage area and projected light within a beam angle for the secondary beam of light substantially covers the second portion of the target coverage area.

3. The luminaire of claim 1 wherein the first portion of the target coverage area is smaller than the secondary portion of the target coverage area.

4. The luminaire of claim 1 wherein the first portion of the target coverage area is substantially the same size as the secondary portion of the target coverage area.

5. The luminaire of claim 1 wherein the first portion of the target coverage area is larger than the secondary portion of the target coverage area.

6. The luminaire of claim 1 wherein the secondary mounting height is between about 0.45 and 0.90 times the primary mounting height.

7. The luminaire of claim 1 wherein the secondary mounting height is between about 0.6 and 0.65 times the primary mounting height.

8. The luminaire of claim 1 wherein the secondary mounting height is between about 0.45 and 0.65 times the primary mounting height.

9. The luminaire of claim 1 wherein the primary beam of light and the secondary beam of light combine to provide at least one of a Type I, Type II, Type III, Type IV, and Type V Illuminating Engineering Society of North America (IESNA) outdoor lighting lateral distribution.

10. The luminaire of claim 1 wherein the primary beam of light and the secondary beam of light combine to provide at least one of a Short, Medium, and Long Illuminating Engineering Society of North America (IESNA) outdoor lighting vertical distribution.

11. The luminaire of claim 1 wherein a primary upper angle associated with the primary light beam is between about 65° and 85°.

12. The luminaire of claim 11 wherein a secondary upper angle associated with the secondary light beam is between about 55° and 65°.

13. The luminaire of claim 12 wherein a secondary lower angle associated with the secondary light beam is about 0°.

14. The luminaire of claim 12 wherein a primary lower angle associated with the primary light beam is between about 45° and 65°.

15. The luminaire of claim 11 wherein a primary lower angle associated with the primary light beam is between about 45° and 65°.

16. The luminaire of claim 1 wherein the luminaire is an outdoor luminaire.

17. A luminaire comprising:
a pole;
a first light source mounted at a primary mounting height to the pole where the first light source comprises primary AC-DC circuitry adapted to at least rectify an AC input signal to provide a primary signal, primary DC-DC circuitry adapted to receive the primary signal and provide at least one primary drive signal, and a primary array of LEDs adapted to provide a primary beam of light in response to the at least one primary drive signal; and
a second light source mounted at a secondary mounting height to the pole, wherein the second light source comprises secondary AC-DC circuitry adapted to at least rectify the AC input signal to provide a secondary signal, secondary DC-DC circuitry adapted to receive the secondary signal and provide at least one secondary drive signal, and a secondary array of LEDs adapted to provide a secondary beam of light in response to the at least one secondary drive signal where the primary mounting height is higher than the secondary mounting height and the first and second light sources are LED-based light sources.

18. A luminaire comprising:
a pole;
a first light source mounted at a primary mounting height to the pole;
a second light source mounted at a secondary mounting height to the pole, wherein the primary mounting height is higher than the secondary mounting height and the first and second light sources are LED-based light sources;
AC-DC circuitry that is adapted to at least rectify an AC input signal to provide a primary signal and a secondary signal, the AC-DC circuitry remotely located from the first light source and the second light source, wherein:
the first light source comprises primary DC-DC circuitry adapted to receive the primary signal and provide at least one primary drive signal, and a primary array of LEDs adapted to provide a primary beam of light in response to the at least one primary drive signal; and
the second light source comprises secondary DC-DC circuitry adapted to receive the secondary signal and provide at least one secondary drive signal, and a secondary array of LEDs adapted to provide a secondary beam of light in response to the at least one secondary drive signal.

19. The luminaire of claim 18 wherein the AC-DC circuitry is mounted at or near a base of the pole.

20. The luminaire of claim 18 wherein the AC-DC circuitry is mounted at a height below the secondary mounting height.

21. A luminaire comprising:
a pole;
a first light source mounted at a primary mounting height to the pole;
a second light source mounted at a secondary mounting height to the pole, wherein the primary mounting height is higher than the secondary mounting height and the first and second light sources are LED-based light sources;
AC-DC circuitry that is adapted to at least rectify an AC input signal to provide a first signal; and
DC-DC circuitry adapted to receive the first signal and provide at least one primary drive signal and at least one secondary drive signal wherein:
the first light source comprises a primary array of LEDs adapted to provide a primary beam of light in response to the at least one primary drive signal; and
the second light source comprises a secondary array of LEDs adapted to provide the secondary beam of light in response to the at least one secondary drive signal, wherein the AC-DC circuitry and the DC-DC circuitry are remotely located from the first light source and the second light source.

22. The luminaire of claim 21 wherein the AC-DC circuitry and the DC-DC circuitry are mounted at or near a base of the pole.

23. The luminaire of claim 21 wherein the AC-DC circuitry and the DC-DC circuitry are mounted at a height below the secondary mounting height.

24. A luminaire comprising:
a pole;
a first light source mounted at a primary mounting height to the pole where the first light source comprises primary DC-DC circuitry adapted to receive a first signal and provide at least one primary drive signal, and a primary array of LEDs adapted to provide a primary beam of light in response to the at least one primary drive signal; and
a second light source mounted at a secondary mounting height to the pole, wherein the second light source comprises secondary AC-DC circuitry adapted to at least recti

Assignees

• Pickard Paul
• Durkee John Wesley
• Cree Inc

Inventors

• Pickard Paul
• Durkee John Wesley

Classifications

• F21S8/086 Primary

  with lighting device attached sideways of the standard, e.g. for roads and highways · CPC title

• F21Y2105/10

  comprising a two-dimensional [2D] array of point-like light-generating elements · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21Y2105/001

  Mechanical Engineering · mapped topic

• H05B33/0842

  Electricity · mapped topic