Reflector structures for lighting devices
AssigneeIDEAL Industries Lighting LLC
InventorP. Joseph DeSena, Jr.
Life of this patent
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Abstract
Solid state lighting devices are configured to provide aggregate emissions that include emissions from solid state light emitters and emissions that are received by preferential reflector structures. Preferential reflectors have non-uniform spectral reflectivities that preferentially reflect certain wavelengths of emissions that are received from solid state light emitters. Solid state lighting devices include solid state light emitters of different correlated color temperature (CCT) values and one or more preferential reflectors configured to shift CCT values of aggregate emissions of such solid state lighting devices, such as to provide tunable aggregate emissions between multiple CCT values along or near a black body locus.
Claims24
A solid state lighting device comprising:
- at least one first solid state light emitter configured to produce first emissions having a first correlated color temperature (CCT);
- at least one second solid state light emitter configured to produce second emissions having a second CCT, wherein the second CCT differs from the first CCT by at least 300 Kelvin (K);
- and
- a preferential reflector arranged to receive at least a portion of each of the first emissions and the second emissions, wherein the preferential reflector comprises a non-wavelength-converting material having a non-uniform spectral reflectivity exhibiting a peak reflectivity for wavelengths along a spectrum locus of a 1931 CIE Chromaticity Diagram within a range of 510 nanometers (nm) to 580 nm, the preferential reflector comprising at least one pigment material of a color corresponding to a wavelength within the peak reflectivity range.
A solid state lighting device comprising:
- at least one first solid state light emitter configured to produce first emissions having a first correlated color temperature (CCT);
- at least one second solid state light emitter configured to produce second emissions having a second CCT, wherein the second CCT differs from the first CCT by at least 300 Kelvin (K);
- and
- a preferential reflector arranged to receive at least a portion of each of the first emissions and the second emissions;
- wherein the preferential reflector comprises a non-wavelength-converting material having a non-uniform spectral reflectivity, and aggregate emissions of the solid state lighting device are tunable between multiple CCT values along a black body locus, wherein the preferential reflector is configured to shift delta u′v′ values of the aggregate emissions of the solid state lighting device in a range between 0 and 0.004.
A solid state lighting device comprising:
- at least one first solid state light emitter configured to produce first emissions having a first correlated color temperature (CCT);
- at least one second solid state light emitter configured to produce second emissions having a second CCT, wherein the second CCT differs from the first CCT by at least 300 Kelvin (K);
- and
- a preferential reflector arranged to receive at least a portion of each of the first emissions and the second emissions, wherein the preferential reflector comprises a non-wavelength-converting material having a non-uniform spectral reflectivity exhibiting a peak reflectivity with a color point on a 1931 CIE Chromaticity Diagram including:
- x, y coordinates that define a point on or within a closed shape bounded by a first line having x, y endpoint coordinates of (0.2806, 0.2883) and (0.0139, 0.7502);
- a curve corresponding to a portion of a spectrum locus of the 1931 CIE Chromaticity Diagram having x, y endpoint coordinates of (0.0139, 0.7502) and (0.5125, 0.4866);
- a second line having x, y endpoint coordinates of (0.5267, 0.4133) and (0.5125, 0.4866);
- and
- a curve corresponding to a portion of a blackbody locus of the 1931 CIE Chromaticity Diagram having x, y endpoint coordinates of (0.2806, 0.2883) and (0.5267, 0.4133).
Dependencies are inferred from the claim text.