Methods for combining light emitting devices in a package and packages including combined light emitting devices
First Claim
1. A method of forming a light emitting device assembly, comprising:
- providing a light emitting device assembly body;
defining a chromaticity region in a two dimensional chromaticity space wherein the chromaticity region is defined within a 10-step MacAdam ellipse of a target chromaticity point, and subdividing the defined chromaticity region into at least three chromaticity subregions;
providing a plurality of light emitting devices that emit light having a chromaticity that falls within the defined chromaticity region;
selecting at least three of the plurality of light emitting devices, wherein each of the three light emitting devices has a chromaticity point in a different one of the chromaticity subregions and wherein the at least three light emitting devices are selected from chromaticity subregions that are complementary relative to the target chromaticity point to at least one other chromaticity subregion from which a light emitting device is selected; and
mounting the selected light emitting devices on the light emitting device assembly body,wherein selecting the at least three light emitting devices comprises selecting at least two sets of light emitting devices, wherein each set of light emitting devices comprises at least two light emitting devices selected from chromaticity subregions that are complementary relative to the target chromaticity point,wherein the chromaticity region encompasses a defined bin in the two dimensional chromaticity space, and the defined bin comprises a quadrangle on a two dimensional chromaticity space,wherein each of the at least three chromaticity subregions at least partially overlaps the defined bin.
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Abstract
Methods of forming a light emitting device package assembly include defining a chromaticity region in a two dimensional chromaticity space within a 10-step MacAdam ellipse of a target chromaticity point, and subdividing the defined chromaticity region into at least three chromaticity subregions, providing a plurality of light emitting devices that emit light having a chromaticity that falls within the defined chromaticity region, selecting at least three of the plurality of light emitting devices, wherein each of the three light emitting devices emits light from a different one of the chromaticity subregions. The at least three light emitting devices are selected from chromaticity subregions that are complementary relative to the target chromaticity point to at least one other chromaticity subregion from which a light emitting device is selected.
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Citations
15 Claims
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1. A method of forming a light emitting device assembly, comprising:
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providing a light emitting device assembly body; defining a chromaticity region in a two dimensional chromaticity space wherein the chromaticity region is defined within a 10-step MacAdam ellipse of a target chromaticity point, and subdividing the defined chromaticity region into at least three chromaticity subregions; providing a plurality of light emitting devices that emit light having a chromaticity that falls within the defined chromaticity region; selecting at least three of the plurality of light emitting devices, wherein each of the three light emitting devices has a chromaticity point in a different one of the chromaticity subregions and wherein the at least three light emitting devices are selected from chromaticity subregions that are complementary relative to the target chromaticity point to at least one other chromaticity subregion from which a light emitting device is selected; and mounting the selected light emitting devices on the light emitting device assembly body, wherein selecting the at least three light emitting devices comprises selecting at least two sets of light emitting devices, wherein each set of light emitting devices comprises at least two light emitting devices selected from chromaticity subregions that are complementary relative to the target chromaticity point, wherein the chromaticity region encompasses a defined bin in the two dimensional chromaticity space, and the defined bin comprises a quadrangle on a two dimensional chromaticity space, wherein each of the at least three chromaticity subregions at least partially overlaps the defined bin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 12, 14)
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8. A method of forming a light emitting device assembly, comprising:
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providing a light emitting device assembly body; defining a chromaticity region in a two dimensional chromaticity space wherein the chromaticity region is defined within a 10-step MacAdam ellipse of a target chromaticity point, and subdividing the defined chromaticity region into at least three chromaticity subregions; providing a plurality of light emitting devices that emit light having a chromaticity that falls within the defined chromaticity region; selecting at least three of the plurality of light emitting devices, wherein each of the three light emitting devices has a chromaticity point in a different one of the chromaticity subregions and wherein the at least three light emitting devices are selected from chromaticity subregions that are complementary relative to the target chromaticity point to at least one other chromaticity subregion from which a light emitting device is selected; and mounting the selected light emitting devices on the light emitting device assembly body, wherein the chromaticity region comprises a first chromaticity region, and the plurality of light emitting devices comprises a first plurality of light emitting devices, the method further comprising; defining a second chromaticity region in a two dimensional chromaticity space wherein the second chromaticity region is defined within a 10-step MacAdam ellipse of a second target chromaticity point and wherein the second chromaticity region does not overlap with the first chromaticity region, and subdividing the second chromaticity region into at least three second chromaticity subregions; providing a second plurality of light emitting devices that emit light having a chromaticity that falls within at least one of the second chromaticity subregions; selecting at least three of the second plurality of light emitting devices, wherein each of the three light emitting devices of the second plurality of light emitting devices emits light from a different one of the second chromaticity subregions; and mounting the selected light emitting devices of the second plurality of light emitting devices on the light emitting device package body. - View Dependent Claims (9, 10, 11)
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13. A method of forming a light emitting device assembly, comprising:
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providing a light emitting device assembly body; defining a chromaticity region in a two dimensional chromaticity space wherein the chromaticity region is defined within a 10-step MacAdam ellipse of a target chromaticity point, and subdividing the defined chromaticity region into at least three chromaticity subregions; providing a plurality of light emitting devices that emit light having a chromaticity that falls within the defined chromaticity region; selecting at least three of the plurality of light emitting devices, wherein each of the three light emitting devices has a chromaticity point in a different one of the chromaticity subregions and wherein the at least three light emitting devices are selected from chromaticity subregions that are complementary relative to the target chromaticity point to at least one other chromaticity subregion from which a light emitting device is selected; mounting the selected light emitting devices on the light emitting device assembly body, wherein the defined subregions comprise a plurality of pairs of complementary subregions, wherein respective subregions in a pair of complementary subregions are arranged opposite a center point of the chromaticity region from one another, wherein selecting the at least three of the plurality of light emitting devices comprises selecting at least four of the plurality of light emitting devices from at least four chromaticity subregions in pairs from respective pairs of complementary subregions, and wherein selecting a pair of light emitting device from one pair of complementary subregions comprises selecting a first light emitting device having a first luminous flux from a first subregion that has a center point that is located a first distance from a center point of the chromaticity region, and selecting a second light emitting device having a second luminous flux from a second subregion that is complementary to the first subregion and that has a center point that is located a second distance from a center point of the chromaticity region, wherein the first distance is smaller than the second distance and wherein the first luminous flux is larger than the second luminous flux.
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15. A light emitting device assembly, comprising:
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a light emitting device assembly body; and at least three light emitting devices on the assembly body, wherein each of the at least three light emitting devices emits light having a chromaticity that falls within a defined chromaticity region in a two dimensional chromaticity space wherein the chromaticity region is defined within a 10-step MacAdam ellipse of a target chromaticity point that is on the black body locus and that has a correlated color temperature between 2600K and 6600K, the defined chromaticity region being subdivided into at least three chromaticity subregions, wherein the at least three light emitting devices emit light when energized that falls within chromaticity subregions that are complementary relative to the target chromaticity point to at least one other chromaticity subregion in which a light emitting device in the light emitting device assembly emits light; wherein the at least three light emitting devices on the assembly body comprises at least two sets of light emitting devices, wherein each set of light emitting devices comprises at least two light emitting devices selected from chromaticity subregions that are complementary relative to the target chromaticity point, wherein the chromaticity region encompasses a defined bin in the two dimensional chromaticity space, and the defined bin comprises a quadrangle on a two dimensional chromaticity space, wherein each of the at least three chromaticity subregions at least partially overlaps the defined bin.
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Specification