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US 8,419,218 B2Granted
Solid state light assembly having light sources in a ring
AssigneeeLumigen LLC
InventorsMahendra Dassanayake, Srini De Mel, Jagath Samarabandu
Life of this patent
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Abstract
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.
Claims19
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.
1 more element
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.
2 more elements
Dependencies are inferred from the claim text.