Solid state light assembly having light sources in a ring
A light assembly having an axis of symmetry that includes an enclosure comprising at least a base and a cover coupled to the base. The light assembly also includes a plurality of light sources disposed on a circuit board within the enclosure in a first ring having a center point aligned with the axis of symmetry. The light assembly also includes a reflector that has a first focal point within the cover and a plurality of second focal points disposed in a second ring coincident with the first ring.
1. A light assembly having an axis of symmetry comprising:
an enclosure comprising at least a base and a cover coupled to the base;
a plurality of light-emitting diodes disposed on a circuit board within the enclosure, said plurality of light emitting diodes disposed in a first ring having a ring center point aligned with the axis of symmetry; and
a partial continuous rotated ellipsoidal reflector having a first focal point within the cover and a plurality of second focal points disposed in a continuous second ring coincident with the first ring, said reflector formed by rotating a major axis of an ellipse around the second ring while continually intersecting the first focal point, said reflector reflecting low angle light from the plurality of light-emitting diodes toward the first focal point then through the cover.
2. A light assembly as recited in claim 1 wherein the first focal point is coincident with a cover center point of the cover.
3. A light assembly as recited in claim 1 wherein the circuit board is disposed on a plane perpendicular to the axis of symmetry of the light assembly.
4. A light assembly as recited in claim 1 wherein the enclosure comprises a housing, said housing disposed between the base and the cover, wherein the housing comprises the reflector.
5. A light assembly as recited in claim 4 wherein the reflector comprises an offset ellipsoidal reflector portion with a rotation angle offset from the axis of symmetry.
6. A light assembly as recited in claim 4 wherein the housing comprises an offset ellipsoidal reflector portion transitioning into a heat dissipating element.
7. A light assembly as recited in claim 1 wherein the reflector is coupled to the circuit board and a housing acting as a heat sink.
8. A light assembly as recited in claim 1 further comprising a light-shifting element disposed within the enclosure.
9. A light assembly as recited in claim 8 wherein the light-shifting element comprises a film having a material having a light-shifting gradient having a first light-shifting rate adjacent the cover and a second light-shifting rate adjacent the center point greater than the first light-shifting rate.
10. A light assembly as recited in claim 8 wherein the light-shifting element is disposed between the first focal point and the plurality of light-emitting diodes.
11. A light assembly as recited in claim 8 wherein the light-shifting element is spherical.
12. A light assembly as recited in claim 8 wherein the light-shifting element comprises a dome coupled to the circuit board.
13. A light assembly as recited in claim 1 wherein the plurality of light-emitting diodes generates heat, said circuit board conducting heat in a radially outward direction to a heat sink, said heat conducting through the heat sink toward the base.
14. A method comprising:
generating light from light-emitting diodes (LEDs) disposed in a first ring on a circuit board within a light assembly;
transmitting high angle light from the LEDs directly through a cover;
reflecting low angle light from the LEDs at a reflector, said reflector having a partial continuous rotated ellipsoidal shape having a common first focal point and a second ring of second focal points coincident with the first ring said reflector formed by rotating a major axis of an ellipse around the second ring while continually intersecting the first focal point; and
directing the low angle light to the first focal point from the reflector.
15. A method as recited in claim 14 further comprising shifting a low angle light frequency using a light-shifting element disposed between the reflector and the common first focal point.
16. A method as recited in claim 14 further comprising positioning a light-shifting film within the light assembly.
17. A method as recited in claim 14 further comprising shifting a low angle light frequency using a light-shifting element disposed at the common first focal point.
18. A method as recited in claim 14 further comprising positioning a light-shifting element at the common first focal point using a standoff extending from the circuit board.
19. A method as recited in claim 14 further comprising positioning a spherical light-shifting element at the common first focal point using a standoff extending from the circuit board.