US 11,791,443 B2
Light emitting diode with high melanopic spectral content
Wouter Soer, Eindhoven (NL); and Gregory Tashjian, San Jose, CA (US)
Assigned to Lumileds LLC, San Jose, CA (US)
Filed by Lumileds LLC, San Jose, CA (US)
Filed on Oct. 11, 2021, as Appl. No. 17/498,350.
Application 17/498,350 is a continuation of application No. 16/686,456, filed on Nov. 18, 2019, granted, now 11,145,793.
Claims priority of provisional application 62/845,474, filed on May 9, 2019.
Prior Publication US 2022/0029070 A1, Jan. 27, 2022
Int. Cl. H01L 33/50 (2010.01); H01L 25/075 (2006.01); H01L 33/62 (2010.01); H01L 33/60 (2010.01); H01L 33/48 (2010.01)
CPC H01L 33/504 (2013.01) [H01L 25/0753 (2013.01); H01L 33/486 (2013.01); H01L 33/60 (2013.01); H01L 33/62 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A tunable lighting system comprising:
a first lighting device configured to emit a first light, the first light having a first m/p ratio; and
a second lighting device configured to emit a second light, the second light having a second m/p ratio that is smaller than the first m/p ratio, the tunable lighting system configured to emit a third light including at least one of the first light, the second light, or a combination of the first light and the second light,
the first lighting device comprising:
a light source, the light source including a royal-blue light having a royal-blue light emitting surface and a blue light having a blue light emitting surface; and
a wavelength converting structure disposed over the royal-blue light emitting surface and the blue light emitting surface, the wavelength converting structure including a mixture of a green phosphor and a red phosphor.