Solid state lighting device including narrow spectrum emitter

摘要

A multi-emitter solid state lighting device includes at least one narrow spectral output solid state light emitter, such as may be in the green range, having a full width-half maximum emission value of no greater than 30 nm. First, second, and third electrically solid state emitters may include dominant wavelengths in the ranges of 485-505 nm (or 491-505 nm), 526-545 nm, and 615-625 nm. Aggregate emissions of a solid state lighting device may comprise a scotopic/photopic (S/P) ratio value that exceeds threshold values for conventional white light-emitting devices including at least one phosphor-converted LED by at least 10%, 20%, 30%, or 40%, in combination with reasonably high gamut and brightness, over a range of desired CCT values.

主权项

1. A lighting device comprising a plurality of electrically activated solid state light emitters including:
at least one first electrically activated solid state light emitter comprising a dominant wavelength in a range of from 485 nm to 505 nm; at least one second electrically activated solid state light emitter comprising a dominant wavelength in a range of from 526 nm to 545 nm; and at least one third electrically activated solid state light emitter comprising a dominant wavelength in a range of from 615 nm to 625 nm; wherein the at least one second electrically activated solid state light emitter comprises a narrow spectral output with a full width—half maximum emission value of no greater than 30 nm; and wherein the lighting device comprises one or more of the following features (i) to (vi): (i) the plurality of electrically activated solid state light emitters is arranged to generate aggregate emissions having a correlated color temperature, and having a scotopic/photopic ratio in at least one of the following ranges (a) to (d):
(a) a value of at least 0.000042 times the correlated color temperature, plus 0.53;(b) a value of at least 0.000045 times the correlated color temperature, plus 0.57;(c) a value of at least 0.000048 times the correlated color temperature, plus 0.62; or(d) a value of at least 0.000069 times the correlated color temperature, plus 0.14; (ii) the lighting device is devoid of any electrically activated solid state light emitter comprising a dominant wavelength in a range of from 546 nm to 614 nm; (iii) the lighting device is devoid of any electrically activated solid state light emitter comprising a dominant wavelength in a range of greater than 625 nm; (iv) aggregate emissions of the lighting device comprise a gamut area index (GAI) value in a range of from 80 to 100; (v) the at least one first electrically activated solid state light emitter comprises multiple first electrically activated solid state light emitters;
the at least one second electrically activated solid state light emitter comprises multiple second electrically activated solid state light emitters;the at least one third electrically activated solid state light emitter comprises multiple third electrically activated solid state light emitters; andthe lighting device comprises a plurality of clusters of electrically activated solid state light emitters, wherein each cluster of the plurality of clusters includes a first electrically activated solid state light emitter of the multiple first electrically activated solid state light emitters, a second electrically activated solid state light emitter of the multiple second electrically activated solid state light emitters, and a third electrically activated solid state light emitter of the multiple third electrically activated solid state light emitters; or (vi) aggregate emissions of the lighting device comprise a color rendering index (CRI Ra) value in a range not exceeding 50.