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US 7,828,461 B2Granted
LED luminaire for generating substantially uniform illumination on a target plane
AssigneeLumination LLC
InventorsMark J. Mayer, Matthew Mrakovich, Nicolo Machi
Life of this patent
Estimating the term…
Abstract
A luminaire that can provide a beam pattern having a substantially uniform illuminance across a target plane includes a plurality of LEDs mounted on a support and at least one reflector fixed with respect to the support and cooperating with the plurality of LEDs.
Claims29
A luminaire comprising:
- a first plurality of LEDs mounted on a support facing a target plane;
- a second plurality of LEDs mounted on the support facing the target plane;
- and
- at least one reflector fixed with respect to the support, the at least one reflector including a first reflective surface of revolution with respect to a line intersecting a fixed point cooperating with each of the first LEDs and a second reflective surface of revolution with respect to the line intersecting the fixed point cooperating with each of the second LEDs, the reflective surfaces being configured to direct light emitted from the respective LEDs toward the target plane forming a first and second generallv annular beam pattern, wherein a peak of luminous intensity of light from the first plurality of LEDs is at a first angle of incidence and a peak of luminous intensity of light from the second plurality of LEDs is at a second angle of incidence, which is less than said first angle, and wherein said second anle of incidence is a function of overlap of the first generally annular beam pattern on the second annular beam pattern and a height at which the LEDs reside over the plane to a combined beam pattern including the first generally annular beam pattern and the second generally annular beam pattern having a generally uniform illumination cross at least a majority of the combined beam pattern on the tagret plane.
1 more element
A luminaire comprising:
- a substantially planar PCB;
- a first set of LEDs mounted on the PCB along an arc of a first circle having a radius r1;
- a second set of LEDs mounted on the PCB along an arc of a second circle having a radius r2, wherein r1 and the first circle is concentric with the second circle about a center point;
- and at least one reflector fixed with respect to the PCB and including a first reflective surface cooperating with each of the first set of LEDs and a second reflective surface cooperating with each of the second set of LEDs, each of the reflective surfaces being a surface of revolution with respect to an axis intersecting the center point and normal to the PCB, wherein the reflective surfaces are configured to direct light emitted from the respective set of LEDs toward a target plane to form a first and second generally annular beam pattern, wherein a peak of luminous intensity of light from the first LEDs is at a first angle of incidence and a peak of luminous intensity of light the second set of LEDs is at a second angle of incidence, which is less than said first angle, and wherein said second angle of incidence is a function of overlap of the first generally annular beam pattern on the second annular beam pattern and a height at which the LEDs reside over the plane to a combined beam pattern.
1 more element
A luminaire comprising:
- a first set of LEDs;
- a first reflective surface cooperating with the first set of LEDs to direct light from the first set of LEDs to form a first generally annular beam pattern on a target plane, wherein a peak of luminous intensity of light from the first set of LEDs is at a first angle of incidence;
- a second set of LEDs;
- and
- a second reflective surface cooperating with the second set of LEDs to direct light from the second set of LEDs to form a second generally annular beam pattern on the target plane, wherein a peak of luminous intensity of light from the second set of LEDs is at a second angle of incidence, wherein the first angle of incidence is greater than the second angle of incidence and the second angle of incidence is a function of overlap of the first generally annular beam pattern on the second annular beam pattern and a height at which the LEDs reside over the plane to a combined beam pattern including the first generally annular beam pattern and the second generally annular beam pattern having a generally uniform illumination across at least a majority of the combined beam pattern on the target plane.
2 more elements
A luminaire for generating substantially uniform illumination on a target surface in a predetermined pattern comprising:
- a mounting surface;
- a central array of LEDs disposed on the mounting surface, the central array comprising a plurality of LEDs and at least one optic configured to generate a first beam pattern on the target surface;
- a plurality of peripheral arrays of LEDs disposed on the mounting surface around the central array, each peripheral array comprising a plurality of LEDs and at least one optic configured to generate a second beam pattern on the target surface;
- wherein a combination of the first beam pattern and the second beam pattern form the predetermined pattern, and wherein a maximum luminous intensity generated by the plurality of peripheral arrays of LEDs is greater than a maximum luminous intensity generated by the central array of LEDs.
1 more element
Dependencies are inferred from the claim text.