Granted Patent B2

US 8,608,347 · App. 13/189,052 · Granted Dec 17, 2013

Abstract

Claims (33)

1. A lighting apparatus, comprising:

an envelope forming an interior volume and comprising light-transmissive material;

a reflector element disposed in the interior volume; and

a plurality of heat dissipating elements arranged radially about a center axis, the plurality of heat dissipating elements having a base end below the envelope and a body element that extends from the base end around the envelope towards a north pole of said lighting apparatus, the body element terminating at a tip end that is spaced-apart from the envelope forming an air gap.

2. The lighting apparatus of claim 1 , wherein the air gap at the tip end is about 2 mm or greater.

3. The lighting apparatus of claim 1 , wherein the reflector element comprises a frusto-conical member.

4. A lighting apparatus, comprising:

an envelope forming an interior volume and comprising light-transmissive material;

a plurality of heat dissipating elements arranged radially about a center axis and spaced apart from the envelope forming an air gap between a peripheral edge of the plurality of heat dissipating elements and the envelope;

a light source in thermal contact with the heat dissipating assembly; and

a reflector element disposed in the interior volume and spaced apart from the light source to intercept light from the light source.

5. The lighting apparatus of claim 4 , wherein the reflector element comprises a frusto-conical member.

6. The lighting apparatus of claim 5 , wherein the frusto-conical member tapers from a center axis toward the envelope.

7. The lighting apparatus of claim 4 , wherein the reflector element comprises an aperture element disposed at the center axis.

8. The lighting apparatus of claim 7 , wherein the aperture element comprises a circular member aligned with the center axis.

9. The lighting apparatus of claim 4 , wherein the light source comprises one or more light emitting diodes.

10. The lighting apparatus of claim 4 , wherein said lighting apparatus exhibits an optical intensity distribution of about 100±20% over a latitude coordinate θ of about 135° or better.

11. The lighting apparatus of claim 4 , wherein said lighting apparatus exhibits an optical intensity distribution of about 100±10% over a latitude coordinate of about 150° or better.

12. The lighting apparatus of claim 4 , wherein the heat dissipating elements fit within a lamp profile that conforms to industry standards.

13. The lighting apparatus of claim 12 , wherein the industry standard is set forth in an ANSI or IEC or other regulatory or industry specifications.

14. The lighting apparatus of claim 4 , wherein the reflector element comprises one or more slots disposed radially about the center axis and positioned between the reflector element and the envelope.

15. The lighting apparatus of claim 4 , wherein the light source comprises one or more organic light emitting diodes.

16. A lighting apparatus, comprising:

an envelope forming an interior volume and comprising light-transmissive material;

a reflector element disposed in the interior volume;

a plurality of heat dissipating elements arranged radially about a center axis and spaced-apart from the envelope forming an air gap; and

a light source in thermal contact with the heat dissipating assembly,

wherein heat dissipating elements have a tip end proximate the envelope, and

wherein the air gap at the tip end is about 2 mm or greater.

17. The lighting apparatus of claim 16 , wherein the reflector element comprises a frusto-conical member.

18. The lighting apparatus of claim 17 , wherein the frusto-conical member tapers from its center axis toward the envelope.

19. The lighting apparatus of claim 16 , wherein the reflector element comprises an aperture element disposed at its center axis.

20. The lighting apparatus of claim 19 , wherein the aperture element comprises a circular member aligned with the center axis.

Assignments (7)