LIGHT EMITTING DEVICES AND SYSTEMS HAVING TUNABLE CHROMATICITY AND METHODS OF TUNING THE CHROMATICITY OF LIGHT EMITTING DEVICES AND SYSTEMS
First Claim
1. A light emitting device package assembly, comprising:
- a light emitting device package body; and
first, second and third white light emitting devices on the package body, wherein each of the first, second and third white light emitting devices emits light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space, wherein the first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse.
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Accused Products
Abstract
A light emitting device package assembly includes a light emitting device package body, and first, second and third white light emitting devices on the package body, each of the first, second and third white light emitting devices emits light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space. The first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse. Related solid state luminaires and methods are also disclosed.
70 Citations
43 Claims
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1. A light emitting device package assembly, comprising:
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a light emitting device package body; and first, second and third white light emitting devices on the package body, wherein each of the first, second and third white light emitting devices emits light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space, wherein the first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A solid state luminaire, comprising:
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first, second and third groups of white light emitting devices, wherein each of the first, second and third strings of white light emitting devices emit light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space, wherein the first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of forming a light emitting device package assembly, comprising:
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providing a light emitting device package body; defining first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space, wherein the first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse; providing a plurality of white light emitting devices that emit light having a chromaticity that falls within the defined chromaticity regions; selecting at least three of the plurality of white light emitting devices, wherein each of the three light emitting devices emits light from a different one of the defined chromaticity regions; and mounting the selected white light emitting devices on the light emitting device package body. - View Dependent Claims (31, 32, 33)
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34. A method of operating a solid state luminaire including first, second and third groups of white light emitting devices, wherein each of the first, second and third groups of white light emitting devices emit light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space, wherein the first, second and third chromaticity regions are spaced apart in the two dimensional chromaticity space by respective regions having at least the size of a seven step MacAdam ellipse, and the method comprising:
independently controlling current through respective ones of the first, second and third strings of white light emitting diodes to generate combined white light having a chromaticity that is intermediate the first, second and third chromaticity regions. - View Dependent Claims (35, 36, 37)
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38. A light emitting device package assembly, comprising:
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a light emitting device package body; and first, second and third white light emitting devices on the package body, wherein each of the first, second and third white light emitting devices emits light when energized having a chromaticity that falls within a respective one of first, second and third non-overlapping chromaticity regions in a two dimensional chromaticity space; wherein chromaticity of combined light output by said light emitting diode package assembly is tunable to at least one of a plurality of points within a tuning region within the two dimensional chromaticity space defined by at least the chromaticities of said first, second, and third light emitting devices. - View Dependent Claims (39, 40, 41, 42)
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43. A method of operating a solid state lighting apparatus, comprising:
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providing at least first, second, and third white light emitting devices in the solid state lighting apparatus that emit light when energized having chromaticities that fall within respective non-overlapping chromaticity regions in a two-dimensional chromaticity space; and tuning a chromaticity of combined light output by said solid state device to any of a plurality of points within a tuning region in the two dimensional chromaticity space defined by at least the respective chromaticities of said first, second, and third white light emitting devices.
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Specification