Solid state lighting device with different illumination parameters at different regions of an emitter array
View Patent ↗Solid state lighting (SSL) devices and methods of manufacturing such devices. One embodiment of an SSL device comprises a support and an emitter array having a plurality of SSL emitters carried by the support. The emitter array has a central region and a peripheral region outward from the central region. Individual SSL emitters in both the central and the peripheral regions have a primary emission direction along which an intensity of light from the SSL emitters is highest, and the primary emission direction of the SSL emitters in the central region is at least substantially the same direction as the primary emission direction of the SSL emitters in the peripheral region. Additionally, a first coverage area ratio of the SSL emitters in the central region is different than a second coverage area ratio of the SSL emitters in the peripheral region.
1. A method for manufacturing a solid state lighting (SSL) emitter system, comprising:
arranging a first set of SSL emitters in a first emission area of an SSL emitter array, wherein the first set of SSL emitters covers a first percentage of the first emission area; and
arranging a second set of SSL emitters in a second emission area of the SSL emitter array,
wherein the second emission area is located outward of the first emission area, wherein the second set of SSL emitters covers a second percentage of the second emission area, and the first percentage is different from the second percentage and wherein a first primary emission direction of the first set of SSL emitters intersects a second primary emission direction of the first set of SSL emitters.
2. The method of claim 1 , further comprising:
arranging a third set of SSL emitters in a third emission area, wherein the third emission area is located outward of the first emission area, and wherein the third SSL emitters cover a third percentage of the third emission area that is greater than the first percentage, and wherein a third primary emission direction of the third set of SSL emitters is parallel to the first primary emission direction of the first set of SSL emitters.
3. The method of claim 1 wherein the SSL emitters are arranged in a radial array.
4. The method of claim 3 wherein a spacing between SSL emitters along a radian decreases with an increasing distance from a center of the array.
5. The method of claim 1 wherein the first percentage is higher than the second percentage.
6. The method of claim 1 wherein the SSL emitters are generally symmetrical about at least one axis.
7. The method of claim 1 wherein intensity of light produced by individual SSL emitters of the first emission area is different than the intensity of light produced by individual SSL emitters of the second emission area.
8. A method for manufacturing a solid state lighting (SSL) emitter system, comprising:
arranging a first set of SSL emitters in a first emission area of an SSL emitter array; and
arranging a second set of SSL emitters in a second emission area of the SSL emitter array different from the first emission area, wherein a first distance between neighboring SSL emitters in the first emission area differs from a second distance between neighboring SSL emitters in the second emission area, and wherein a first primary emission direction of the first set of SSL emitters intersects a second primary emission direction of the first set of SSL emitters.
9. The method of claim 8 wherein the second emission area is peripheral to the first emission area, and wherein the individual SSL emitters in the second emission area are larger than the individual SSL emitters in the first emission area.
10. The method of claim 8 wherein spacing between the individual SSL emitters in the first emission area decreases with increasing distance from a center of the first emission area.
11. The method of claim 8 , further comprising:
covering the SSL emitters with a converter material.