Lighting device and lighting method
First Claim
1. A lighting device comprising:
- a first group of solid state light emitters;
a second group of solid state light emitters; and
at least first and second portions of luminescent material;
wherein;
the first group of solid state light emitters and the second group of solid state light emitters, if illuminated, would emit light having a peak wavelength in the range of from 430 nm to 480 nm;
the first portion of luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm;
the second portion of luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; and
if the first group of solid state light emitters is illuminated, a portion of light emitted from the first group of solid state light emitters would excite the first portion of luminescent material, and a mixture of light exiting the lighting device that was emitted from the first group of solid state light emitters and light exiting the lighting device that was emitted from the first portion of luminescent material would, in the absence of any additional light, have a first group mixed illumination corresponding to a first point on a 1931 CIE Chromaticity Diagram, the first point having a first correlated color temperature;
if the second group of solid state light emitters is illuminated, a portion of light emitted from the second group of solid state light emitters would excite the second portion of luminescent material, and a mixture of light exiting the lighting device that was emitted from the second group of solid state light emitters and light exiting the lighting device that was emitted from the second portion of luminescent material would, in the absence of any additional light, have a second group mixed illumination corresponding to a second point on a 1931 CIE Chromaticity Diagram, the second point having a second correlated color temperature; and
the first correlated color temperature differs from the second correlated color temperature by at least 50 K.
2 Assignments
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Accused Products
Abstract
A lighting device comprising first and second groups of solid state light emitters, which emit light having peak wavelength in ranges of from 430 nm to 480 nm, and first and second groups of lumiphors which emit light having dominant wavelength in the range of from 555 nm to 585 nm. In some embodiments, if current is supplied to a power line, a combination of (1) light exiting the lighting device which was emitted by the first group of emitters, and (2) light exiting the lighting device which was emitted by the first group of lumiphors would have a correlated color temperature which differs by at least 50 K from a correlated color temperature which would be emitted by a combination of (3) light exiting the lighting device which was emitted by the second group of emitters, and (4) light exiting the lighting device which was emitted by the second group of lumiphors.
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Citations
39 Claims
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1. A lighting device comprising:
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a first group of solid state light emitters; a second group of solid state light emitters; and at least first and second portions of luminescent material; wherein; the first group of solid state light emitters and the second group of solid state light emitters, if illuminated, would emit light having a peak wavelength in the range of from 430 nm to 480 nm; the first portion of luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; the second portion of luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; and if the first group of solid state light emitters is illuminated, a portion of light emitted from the first group of solid state light emitters would excite the first portion of luminescent material, and a mixture of light exiting the lighting device that was emitted from the first group of solid state light emitters and light exiting the lighting device that was emitted from the first portion of luminescent material would, in the absence of any additional light, have a first group mixed illumination corresponding to a first point on a 1931 CIE Chromaticity Diagram, the first point having a first correlated color temperature; if the second group of solid state light emitters is illuminated, a portion of light emitted from the second group of solid state light emitters would excite the second portion of luminescent material, and a mixture of light exiting the lighting device that was emitted from the second group of solid state light emitters and light exiting the lighting device that was emitted from the second portion of luminescent material would, in the absence of any additional light, have a second group mixed illumination corresponding to a second point on a 1931 CIE Chromaticity Diagram, the second point having a second correlated color temperature; and the first correlated color temperature differs from the second correlated color temperature by at least 50 K. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A lighting device comprising:
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a first group of solid state light emitters; and a second group of solid state light emitters, wherein; the first group of solid state light emitters are with at least a first portion of luminescent material in a first group of encapsulant elements, the second group of solid state light emitters are with at least a second portion of luminescent material in a second group of encapsulant elements, the first group of solid state light emitters and the second group of solid state light emitters, if illuminated, would emit light having a peak wavelength in the range of from 430 nm to 480 nm; the first portion of luminescent material and the second portion of luminescent material, if excited, would emit light having a dominant wavelength in the range of from about 555 nm to about 585 nm; and if the first group of solid state light emitters is illuminated and the first portion of luminescent material is excited, a mixture of light exiting the lighting device that was emitted from the first group of solid state light emitters and light exiting the lighting device that was emitted from the first portion of luminescent material would, in the absence of any additional light, have a first group mixed illumination corresponding to a first point on a 1931 CIE Chromaticity Diagram, the first point having a first correlated color temperature; if the second group of solid state light emitters is illuminated and the second portion of luminescent material is excited, a mixture of light exiting the lighting device that was emitted from the second group of solid state light emitters and light exiting the lighting device that was emitted from the second portion of luminescent material would, in the absence of any additional light, have a second group mixed illumination corresponding to a second point on a 1931 CIE Chromaticity Diagram, the second point having a second correlated color temperature; and the first correlated color temperature differs from the second correlated color temperature by at least 50 K. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A method of lighting comprising:
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illuminating a first group of solid state light emitters, the first group of solid state light emitters including at least one solid state light emitter, such that each of the first group of solid state light emitters emits light having a peak wavelength in the range of from 430 nm to 480 nm; exciting a first portion of luminescent material, such that the first portion of luminescent material emits light having a dominant wavelength in the range of from about 555 nm to about 585 nm; illuminating a second group of solid state light emitters, the second group of solid state light emitters including at least one solid state light emitter, such that each of the second group of solid state light emitters emits light having a peak wavelength in the range of from 430 nm to 480 nm; exciting a second group of luminescent material, such that the second group of luminescent material emits light having a dominant wavelength in the range of from about 555 nm to about 585 nm; wherein; a first mixture of (1) light emitted from the first group of solid state light emitters and (2) light emitted from the first portion of luminescent material would, in the absence of any additional light, have a first correlated color temperature on a 1931 CIE Chromaticity Diagram; a second mixture of (1) light emitted from the second group of solid state light emitters and (2) light emitted from the second portion of luminescent material would, in the absence of any additional light, have a second correlated color temperature on a 1931 CIE Chromaticity Diagram; and the first correlated color temperature differs from the second correlated color temperature by at least 50 K. - View Dependent Claims (35, 36, 37, 38, 39)
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Specification