Opto-thermal solution for multi-utility solid state lighting device using conic section geometries
A light assembly 1100 includes a cover 18 , a housing 16 coupled to the cover 18 and a lamp base 14 coupled to the cover 18 . The light assembly 1100 also includes a first circuit board 30 disposed within the housing 16 . The first circuit board 30 has a plurality of light sources 32 thereon. A heat sink 210 is thermally coupled to the light sources 32 . The heat sink 32 includes a plurality of spaced-apart layers 1140 having outer edges and openings therethrough. Each of the outer edges 1144 are in contact with the housing 16 . The light assembly also includes an elongated control circuit board assembly 1110 electrically coupled to the light sources 32 of the first circuit board 30 and the lamp base 14 . The control circuit board 1110 extends through the openings 1170 . The control circuit board 1110 has a plurality of electrical components 1112 thereon for controlling the light sources 32.
1. A light assembly comprising: a base; a housing coupled to the base, said housing comprising a hyperboloidal portion and a partial rotated ellipsoidal reflector portion that has a major axis offset from an axis of symmetry from the light assembly disposed between a cover and the hyperboloidal portion; said cover coupled to the housing, said cover comprising a first ellipsoidal portion or spherical portion, said cover comprising a cover center point; and a circuit board disposed within the housing having a plurality of light-emitting diodes mounted thereon, said rotated partial offset ellipsoidal reflector portion has a first focal point coincident with the cover center point and a plurality of second focal points disposed in a first ring at the circuit board, wherein the light-emitting diodes are arranged on the first ring.
2. A light assembly as recited in claim 1 wherein the base, the housing and the cover comprise a common axis of symmetry.
3. A light assembly as recited in claim 1 wherein said reflector disposed within the cover reflects low angle light from the plurality of light-emitting diodes.
4. A light assembly as recited in claim 3 wherein the reflector is coupled to a circuit board and acts as a heat sink.
5. A light assembly as recited in claim 1 wherein the circuit board is in direct contact with the housing, said housing acting as a heat sink whereby heat generated at the circuit board is conducted radially outward toward the housing and through the housing toward the base.
6. A light assembly as recited in claim 1 further comprising a light-shifting element shifting the light emitted from the light-emitting diodes.
7. A light assembly as recited in claim 6 wherein the light-shifting element comprises a material having a light-shifting gradient having a first light-shifting rate adjacent the cover and a second light-shifting rate adjacent the cover center point greater than the first light-shifting rate at the cover.
8. A light assembly as recited in claim 6 wherein the light-shifting element is coupled to the circuit board with a stand-off.
9. A light assembly as recited in claim 6 wherein the light-shifting element is spaced apart from the light-emitting diodes and is spherical.
10. A light assembly as recited in claim 6 wherein the light-shifting element comprises a dome coupled to the circuit board.
11. A light assembly as recited in claim 6 wherein the light-shifting element comprises a film extending across the cover in a direction perpendicular to an axis of symmetry of the cover.
12. A light assembly comprising: an enclosure comprising a first portion comprising a first ellipsoidal or spherical portion having a center point therein, a second ellipsoidal portion adjacent to the first portion comprising a partial rotated ellipsoidal reflector portion having a major axis offset from an axis of symmetry of the light assembly and a hyperboloidal portion adjacent to the second ellipsoidal portion; and a circuit board disposed within the enclosure adjacent to the hyperboloidal portion having a plurality of light-emitting diodes mounted thereon, said ellipsoidal reflector portion has a first focal point coincident with the center point and a plurality of second focal points disposed in a first ring at the circuit board, wherein the light-emitting diodes are disposed in a second ring coincident with the first ring.
13. A light assembly as recited in claim 12 wherein the enclosure comprises a housing comprising the first ellipsoidal portion, a base and a cover comprising the second ellipsoidal portion.
14. A light assembly as recited in claim 13 wherein the base, the housing and the cover comprise a common axis corresponding to the axis of symmetry.
15. A light assembly as recited in claim 14 wherein the second ring has a ring center point aligned with the common axis.