Light assembly having light sources and adjacent light tubes
A light assembly includes a light source circuit board and a plurality of light-emitting diodes disposed on the light source circuit board. A plurality of light pipes axially extends from and adjacent to each light-emitting diode. Each light pipe has a respective first end adjacent to the plurality of light-emitting diodes and a second end opposite to the light-emitting diodes. The plurality of light pipes communicates light from the light-emitting diodes therethrough and defines a cavity therebetween. A plurality of thermal vanes forms a heat sink for removing heat from the light-emitting diodes. The plurality of thermal vanes extend adjacent to the plurality of light pipes. A driver circuit board is disposed within the cavity.
1. A light assembly having an axis of symmetry comprising:
a light source circuit board;
a plurality of light-emitting diodes disposed on the light-emitting diode circuit board;
a plurality of light pipes axially extending from and adjacent to each light-emitting diode, each light pipe having a respective first end adjacent to the plurality of light-emitting diodes and a second end opposite to the light-emitting diodes, said plurality of light pipes communicating light from the light-emitting diodes therethrough and defining a cavity therebetween;
a plurality of thermal vanes forming a heat sink for removing heat from the light-emitting diodes, said plurality of thermal vanes extending adjacent the plurality of light pipes; and
a driver circuit board disposed within the cavity.
2. A light assembly as recited in claim 1 wherein the plurality of light-emitting diodes are disposed in a first ring on the light source circuit board and have a center point aligned with the axis of symmetry.
3. A light assembly as recited in claim 1 wherein the first end of each of the plurality of light pipes comprises a collimating optic within a cavity adjacent to the respective light-emitting diodes.
4. A light assembly as recited in claim 3 wherein a wavelength-shifting element is disposed within the cavity to shift a wavelength of light emitted from the light-emitting diodes.
5. A light assembly as recited in claim 1 wherein the second end comprises a beam forming optic.
6. A light assembly as recited in claim 1 wherein the circuit board comprises at least one metallic layer and the plurality of thermal vanes extending from the metallic layer.
7. A light assembly as recited in claim 1 wherein the driver circuit board is disposed within a shielded enclosure within the cavity.
8. A light assembly as recited in claim 1 further comprising a cap adjacent to each of the plurality of second ends and enclosing the cavity, said cap having a light reflecting surface reflecting light out of the cap.
9. A light assembly as recited in claim 1 wherein the plurality of light pipes form a unitary structure.
10. A light assembly as recited in claim 1 wherein the light pipes are coated with a light-reflective coating on an external surface thereof.
11. A light assembly as recited in claim 1 wherein the light pipes each comprise a round cross-sectional area.
12. A light assembly as recited in claim 1 wherein the light pipes each comprise a rectangular cross-sectional area.
13. A light assembly as recited in claim 1 wherein the light pipes comprise a wavelength-shifting element for shifting the wavelength of light in the light pipes.
14. A light assembly as recited in claim 13 wherein the wavelength-shifting element is disposed on an outer surface of the light pipe.
15. A light assembly as recited in claim 13 wherein the wavelength-shifting element is disposed longitudinally within the light pipe.
16. A light assembly as recited in claim 1 wherein the circuit board is disposed on a plane perpendicular to an axis of symmetry of the light bulb.
17. A light assembly as recited in claim 1 wherein the circuit board comprises a plurality of wedge shaped sectors.
18. A light assembly as recited in claim 1 wherein the light pipes are coated with a reflective material.
19. A light assembly as recited in claim 1 wherein a beam-forming surface is formed on a cap that is disposed adjacent to and extending between each light pipe.
20. A light assembly having an axis of symmetry comprising:
a light source circuit board having an electrically conductive layer;
a plurality of light-emitting diodes disposed on the light source circuit board in a ring shape;
a plurality of elongated light pipes axially extending from and adjacent to each of the plurality of light-emitting diodes, each light pipe having a first end adjacent to one of the plurality of light-emitting diodes and a second end opposite to the plurality of light-emitting diodes, said plurality of light pipes defining a cavity therebetween;
a plurality of thermal vanes thermally coupled to the conductive layer and forming a heat sink for removing heat from the light-emitting diodes, said plurality of thermal vanes extending axially along and adjacent to the plurality of light pipes; and
a driver circuit board disposed within the cavity.