Staggered LED based high-intensity light

• US 8,033,683 B2
• Filed: 02/13/2009
• Issued: 10/11/2011
• Est. Priority Date: 02/15/2008
• Status: Active Grant

• Current Assignee: Excelitas Canada, Inc.
• Original Assignee: Perkinelmer Led Solutions, Inc.
• Inventors: Fields, Craig
• Primary Examiner(s): BRUCE, DAVID VERNON
• Application Number:
  US12/370,793
• Publication Number:
  US 20090207605A1
• Time in Patent Office: 970 Days
• Field of Search: 362/231, 362/230, 362/247, 362/249.02, 362/310
• US Class Current: 362/231
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21W 2111/06 for aircraft runways or the like
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A high intensity LED based lighting array for use in an obstruction light with efficient uniform light output is disclosed. The high intensity LED based lighting array has a first concentric ring having a plurality of reflectors and light emitting diodes. The concentric ring has a planar surface mounting each of the plurality of reflectors in perpendicular relation to a respective one of the plurality of light emitting diodes. A second concentric ring is mounted on the first concentric ring. The second concentric ring has a second plurality of reflectors and light emitting diodes. The second concentric ring has a planar surface mounting each of the plurality of reflectors in perpendicular relation to a respective one of the plurality of light emitting diodes. The second plurality of reflectors and light emitting diodes are offset from the reflectors and light emitting diodes of the first concentric ring.

Claims

1. A lighting array for a high intensity light comprising:

a first ring having a first plurality of reflectors having a reflective surface and light emitting diodes disposed on the circumference of the first ring, the ring having a planar surface mounting each of the plurality of reflectors such that the reflective surface is in substantially perpendicular relation to a respective one of the plurality of light emitting diodes; and

a second ring mounted on the first ring, the second ring having a second plurality of reflectors and light emitting diodes disposed on the circumference of the second ring, the second ring having a planar surface mounting each of the plurality of reflectors in perpendicular relation to a respective one of the plurality of light emitting diodes, wherein the number of light emitting diodes in the first ring is the same as the number of light emitting diodes in the second ring and each of the second plurality of reflectors and the first and second rings are rotationally offset such that the light emitting diodes and respective reflectors of the second ring are staggered by a radial angle from the respective reflectors and light emitting diodes of the first ring.

2. The lighting array of claim 1, further comprising a third, fourth, fifth and sixth ring, each ring having a plurality of reflectors and light emitting diodes, the third, fourth, fifth and sixth rings mounted on the second ring.

3. The lighting array of claim 2, further comprising a seventh ring having a plurality of reflectors and red light emitting diodes, and wherein the light emitting diodes of the first through sixth rings are white light emitting diodes.

4. The lighting array of claim 1, wherein the high intensity light is compliance with FAA and ICAO standards.

5. The lighting array of claim 1, wherein the first ring includes a plurality of circuit boards mounting the light emitting diodes and a heat sink coupled to the plurality of circuit boards.

6. The lighting array of claim 1 further comprising:

a base member;

a rod extending from the base member; and

wherein the first and second rings include an alignment hole for mounting the rod, the alignment holes for the first and second rings being radially offset to fix the first and second rings in position with each other via mounting the rod.

7. The lighting array of claim 1, wherein the reflectors include one or more parabolic, conic, aspheric, anamorphic, or faceted reflector surfaces.

8. The lighting array of claim 1, wherein the reflectors each form a horizontal beam approximately 5°

wide.

9. The lighting array of claim 1, where the radial angle between rings is roughly equal to 360 degrees divided by the number of LEDs on a ring and the rings of a given LED color.

10. The lighting array of claim 1, where a radial angle offset between the LEDs of the rings is used to reduce azmuith ripple.

11. The lighting array of claim 1, where the plurality of reflectors consists of TIR or other optical elements.

12. A lighting array for a high intensity light beacon compliant with FAA or ICAO standards, the lighting array comprising:

a base member;

a first ring mounted on the base member, the first ring having a plurality of reflectors each having a reflective surface and corresponding light emitting diodes disposed on the circumference of the first ring sufficient for 360 degree light emission from the first ring, the first ring having a planar surface mounting each of the plurality of reflectors in perpendicular relation to a respective one of the plurality of light emitting diodes; and

a second ring mounted on the first ring, the second ring having a second plurality of reflectors each having reflective surface and light emitting diodes disposed on the circumference of the second ring sufficient for 360 degree light emission from the second ring, the second ring having a planar surface mounting each of the plurality of reflectors in perpendicular relation to a respective one of the plurality of light emitting diodes, wherein the number of light emitting diodes in the first ring is the same as the number of light emitting diodes in the second ring and each of the second plurality of reflectors and the first and second rings are rotationally offset such that the light emitting diodes and respective reflectors of the second ring are staggered by a radial angle from the respective reflectors and light emitting diodes of the first ring.

13. The lighting array of claim 12, further comprising a third, fourth, fifth and sixth ring, each ring having a plurality of reflectors and light emitting diodes, the third, fourth, fifth and sixth rings mounted on the second ring.

14. The lighting array of claim 13, further comprising a seventh ring having a plurality of reflectors and red light emitting diodes, and wherein the light emitting diodes of the first through sixth rings are white light emitting diodes.

15. The lighting array of claim 12, wherein the first plurality of light emitting diodes is 36 light emitting diodes and the second plurality of light emitting diodes is 36 light emitting diodes.

16. The lighting array of claim 12, wherein the first ring includes a plurality of circuit boards mounting the light emitting diodes and a heat sink coupled to the plurality of circuit boards;

and wherein the second ring includes a second plurality of circuit boards mounting the second plurality of light emitting diodes and a second heat sink coupled to the second plurality of light emitting diodes.

17. The lighting array of claim 12 further comprising a rod extending from the base member;

and wherein the first and second rings include an alignment hole for mounting the rod, the alignment holes for the first and second rings being offset to fix the first and second concentric rings in position with each other via mounting the rod.

18. The lighting array of claim 12, wherein the reflectors include one or more parabolic, conic, aspheric, anamorphic, or faceted reflector surfaces.

19. The lighting array of claim 12, wherein the reflectors each form a horizontal beam approximately 5°

wide.

20. The lighting array of claim 12, where the radial offset between the LEDs of the rings is roughly equal to 360 degrees divided by the number of LEDs on a ring and the number of rings of a given color.

21. The lighting array of claim 12, where a radial offset between rings is used to reduce azimuth ripple.

22. The lighting array of claim 12, where the plurality of reflectors consists of TIR or other optical elements.