Patent ID: 9530944
Filing Date: 2016-12-27
CPC Classification: F21K,F21Y,H01L

Claim Text:
1. A lighting device comprising: at least one first electrically activated solid state emitter arranged to generate first emissions comprising a dominant wavelength in a blue range; at least one lumiphoric material arranged to receive at least a portion of the first emissions and produce lumiphor emissions comprising a dominant wavelength in a green or yellow-green range; and at least one second electrically activated solid state emitter arranged to generate second emissions comprising a dominant wavelength in a red or red-orange range; wherein aggregate emissions of the lighting device include at least a portion of the first emissions, at least a portion of the lumiphor emissions, and at least a portion of the second emissions; wherein said aggregate emissions comprise a correlated color temperature (CCT) value, and said aggregate emissions comprise a relative gamut area (Qg) value of at least the value obtained by the equation 121 minus the product of 0.003 times the CCT value; and wherein the lighting device comprises at least one of the following features (a) to (c): (a) a combination of (A) the lumiphor emissions and (B) an unabsorbed portion of the first emissions transmitted through or past the at least one lumiphoric material would, in the absence of any additional light, produce a mixture of light having 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 (0.040, 0.329) and (0.257, 0.345), a second line having x, y endpoint coordinates of (0.257, 0.345) and (0.332, 0.551), a third line having x, y endpoint coordinates of (0.332, 0.551) and (0.020, 0.770), and a curve corresponding to a portion of the spectrum locus having x, y endpoint coordinates of (0.020, 0.770) and (0.040, 0.329); (b) said aggregate emissions comprise a R9-prime color rendering value that is greater than 110; or (c) said aggregate emissions comprise a R9-prime color rendering value that is at least the value obtained by the equation (9 times the Qg value) minus 873, wherein the R9-prime color rendering value is also greater than 100.