US 12,132,033 B2
White light emitting devices having high luminous efficiency and improved color rendering that include pass-through violet emissions
Nishant Tiwari, Apex, NC (US); Al Safarikas, Cary, NC (US); and David Power, Morrisville, NC (US)
Assigned to Cree Lighting USA LLC, Racine, WI (US)
Filed by Cree Lighting USA LLC, Racine, WI (US)
Filed on Feb. 14, 2023, as Appl. No. 18/109,554.
Application 18/109,554 is a continuation of application No. 17/167,585, filed on Feb. 4, 2021, granted, now 11,600,605.
Application 17/167,585 is a continuation of application No. 16/717,389, filed on Dec. 17, 2019, granted, now 10,950,584, issued on Mar. 16, 2021.
Application 16/717,389 is a continuation of application No. 16/179,126, filed on Nov. 2, 2018, granted, now 10,546,843, issued on Jan. 28, 2020.
Claims priority of provisional application 62/581,174, filed on Nov. 3, 2017.
Prior Publication US 2023/0187420 A1, Jun. 15, 2023
Int. Cl. H01L 25/075 (2006.01); F21K 9/232 (2016.01); H01L 33/50 (2010.01); F21Y 103/10 (2016.01); F21Y 113/17 (2016.01); F21Y 115/10 (2016.01)
CPC H01L 25/0753 (2013.01) [F21K 9/232 (2016.08); H01L 33/504 (2013.01); F21Y 2103/10 (2016.08); F21Y 2113/17 (2016.08); F21Y 2115/10 (2016.08)] 20 Claims
OG exemplary drawing
 
1. A light emitting device, comprising:
a first group of at least one first solid state emitter, each first solid state emitter comprising a first light emitting diode (“LED”) that, when excited, emits light having a peak wavelength in a blue color range; and
a second group of at least one second solid state emitter, each second solid state emitter comprising a second LED that, when excited, emits light having a peak wavelength in a range between about 390 nm and about 415 nm; and
at least one luminophoric medium, wherein the at least one luminophoric medium is configured be excited by light from one or more of: (a) the first group of at least one first solid state emitter and (b) the second group of at least one second solid state emitter;
wherein the emission of the light in the 390 nm to 415 nm wavelength range is configured to increase a saturation of a remainder of the emitted light of the light emitting device in a green-yellow color range by at least 10%.