Solid state lighting devices with color point non-coincident with blackbody locus

摘要

Solid state lighting devices include at least one electrically activated solid state light emitter and at least one lumiphor (or multiple electrically activated emitters optionally devoid of a lumiphor), with resulting emissions arranged to attain a color point in a desired CCT range (e.g., from 2,500K to 10,000K) that is non-coincident with a blackbody or Planckian locus, preferably with a negative Planckian offset Delta u′v′ value (below the Planckian locus) according to a CIE 1976 chromaticity diagram, such as a value in a range of no greater than negative 0.01.

主权项

1. A lighting device comprising:
at least one primary solid state light emitter configured to emit primary solid state light emitter emissions comprising a dominant wavelength in a range of from 430 nm to 480 nm; a lumiphor configured to receive and be excited by at least a portion of emissions of the at least one primary solid state light emitter, and emit lumiphor emissions comprising a dominant wavelength in a range of from about 535 nm to about 585 nm; at least one supplemental solid state light emitter configured to generate supplemental solid state light emitter emissions comprising a dominant wavelength in a range of from 590 nm to 630 nm; and wherein a combination of (A) light exiting the lighting device that was emitted by the at least one primary solid state light emitter, (B) light exiting the lighting device that was emitted by the lumiphor, and (C) light exiting the lighting device that was emitted by the at least one supplemental solid state light emitter would, in the absence of any additional light, produce a mixture of light having a color point defined on a CIE 1976 u′-v′ chromaticity diagram by a correlated color temperature value in a range of from 2,500K to 10,000K and by a Planckian offset Delta u′v′ value in a range of no greater than negative 0.01; and wherein the lighting device is devoid of any electrically activated solid state light emitter configured to generate emissions (i) having dominant wavelength in a range of from 430 nm to 480 nm and (ii) exiting the lighting device without passage through a layer or region comprising a lumiphoric material.