Methods for combining light emitting devices in a white light emitting apparatus that mimics incandescent dimming characteristics and solid state lighting apparatus for general illumination that mimic incandescent dimming characteristics
First Claim
1. A light emitting apparatus, comprising:
- a first light emitting device configured to emit light having a first chromaticity point that falls within a region on a 1931 CIE Chromaticity Diagram defined by points having coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38); and
at least two second light emitting devices, wherein each of the at least two second light emitting devices emits light having a respective second chromaticity points that falls outside a 7-step MacAdam ellipse around a point on the black body locus having a correlated color temperature between 2700K and 6500K;
wherein a combined light emitted by the first light emitting device and the at least two second light emitting devices has a third chromaticity point that falls within a 7-step MacAdam ellipse around a point on the black body locus having a correlated color temperature between 2700K and 6500K; and
wherein the third chromaticity shifts to a more reddish chromaticity when power supplied to the light emitting devices is decreased.
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Accused Products
Abstract
A light emitting apparatus includes a first light emitting device configured to emit light having a first chromaticity point that falls within a region on a 1931 CIE Chromaticity Diagram defined by points having coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38), and at least two second light emitting devices, each of the at least two second light emitting devices emits light having a respective second chromaticity points that that have ccx values greater than 0.4077 and ccy values less than 0.3944 on the 1931 CIE Chromaticity Diagram. A combined light emitted by the first light emitting device and the at least two second light emitting devices has a third chromaticity point that falls within a 7-step MacAdam ellipse around a point on the black body locus having a correlated color temperature between 2700K and 6500K. The third chromaticity may shift to a more reddish chromaticity when power supplied to the light emitting devices is decreased.
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Citations
5 Claims
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1. A light emitting apparatus, comprising:
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a first light emitting device configured to emit light having a first chromaticity point that falls within a region on a 1931 CIE Chromaticity Diagram defined by points having coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38); and at least two second light emitting devices, wherein each of the at least two second light emitting devices emits light having a respective second chromaticity points that falls outside a 7-step MacAdam ellipse around a point on the black body locus having a correlated color temperature between 2700K and 6500K; wherein a combined light emitted by the first light emitting device and the at least two second light emitting devices has a third chromaticity point that falls within a 7-step MacAdam ellipse around a point on the black body locus having a correlated color temperature between 2700K and 6500K; and wherein the third chromaticity shifts to a more reddish chromaticity when power supplied to the light emitting devices is decreased. - View Dependent Claims (2, 3, 4)
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5. A light emitting apparatus, comprising:
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a first light emitting device configured to emit light having a first chromaticity point; and at least two second light emitting devices, wherein each of the at least two second light emitting devices emits light having a respective second chromaticity points that falls outside a 7-step MacAdam ellipse around a point on the black body locus having a correlated color temperature between 2700K and 6500K; wherein a combined light emitted by the first light emitting device and the at least two second light emitting devices has a third chromaticity point that falls within a 7-step MacAdam ellipse around a point on the black body locus having a correlated color temperature between 2700K and 6500K; and wherein a ccx value the third chromaticity point increases when power supplied to the light emitting devices is decreased.
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Specification