Solid state lighting devices incorporating notch filtering materials
AssigneeCree, Inc.
InventorAntony Paul van de Ven
Life of this patent
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Abstract
Solid state lighting devices include one or more notch filtering materials arranged to filter light emissions to exhibit a spectral notch. At least one notch filtering material may be arranged in at least one coating deposited directly on an emitter chip or on a lumiphoric material that itself is coated or otherwise deposited on an emitter chip. A notch filtering material may be combined with a lumiphoric material. Emissions of a resulting lighting device may include a CRI Ra value of at least 80 and a GAI value in a range of from 75 to 100 or from 80 to 100.
Claims23
A solid state lighting device comprising:
- at least one electrically activated solid state emitter chip;
- and
- a coating deposited on the at least one electrically activated solid state emitter chip, the coating including a lumiphoric material blended with a notch filtering material;
- wherein:
- the lumiphoric material is arranged to receive at least a portion of emissions of the at least one electrically activated solid state emitter chip and responsively emit lumiphor emissions;
- and
- the notch filtering material is arranged to receive at least a portion of the lumiphor emissions and filter the received lumiphor emissions to exhibit a spectral notch.
A solid state lighting device comprising:
- at least one electrically activated solid state emitter chip mounted over a substrate or submount;
- a lumiphoric material arranged in a lumiphoric material coating comprising lumiphoric material particles deposited directly on the at least one electrically activated solid state emitter chip to receive at least a portion of emissions of the at least one electrically activated solid state emitter chip and responsively emit lumiphor emissions;
- and
- a notch filtering material arranged in a filter coating or layer deposited directly on the lumiphoric material coating, wherein the notch filtering material is arranged to receive at least a portion of the lumiphor emissions and filter the received lumiphor emissions to exhibit a spectral notch;
- wherein each of the lumiphoric material coating and the filter coating or layer is devoid of contact with the substrate or submount.
A solid state lighting device comprising:
- at least one electrically activated solid state emitter;
- a lumiphoric material arranged to receive at least a portion of emissions of the at least one electrically activated solid state emitter and responsively emit lumiphor emissions;
- and
- a notch filtering material arranged to receive at least a portion of the lumiphor emissions and filter the received lumiphor emissions to exhibit a spectral notch;
- wherein emissions of the solid state lighting device have (i) a color rendering index (CRI Ra) value of at least 80, and (ii) a gamut area index (GAI) value in a range of from 80to 100.
Dependencies are inferred from the claim text.