US 11,788,690 B2
Light emitting device with improved warm-white color point
Wouter Soer, Eindhoven (NL); and Hans-Helmut Bechtel, Roetgen (DE)
Assigned to Lumileds LLC, San Jose, CA (US)
Filed by LUMILEDS LLC, San Jose, CA (US)
Filed on Jan. 20, 2022, as Appl. No. 17/580,166.
Application 17/580,166 is a continuation of application No. 17/064,487, filed on Oct. 6, 2020, granted, now 11,231,148.
Application 17/064,487 is a continuation of application No. 16/140,012, filed on Sep. 24, 2018, granted, now 10,837,607, issued on Nov. 17, 2020.
Claims priority of provisional application 62/563,483, filed on Sep. 26, 2017.
Claims priority of application No. 8151002 (EP), filed on Jan. 10, 2018.
Prior Publication US 2022/0146058 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 9/00 (2018.01); F21K 9/64 (2016.01); H01L 25/075 (2006.01); H01L 33/50 (2010.01); C09K 11/08 (2006.01); F21V 23/00 (2015.01); F21V 7/22 (2018.01); F21K 9/62 (2016.01); C09K 11/77 (2006.01)
CPC F21K 9/64 (2016.08) [C09K 11/0883 (2013.01); C09K 11/77347 (2021.01); C09K 11/77348 (2021.01); F21K 9/62 (2016.08); F21V 7/22 (2013.01); F21V 23/009 (2013.01); H01L 25/0753 (2013.01); H01L 33/504 (2013.01); H01L 33/507 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light emitting device, comprising:
an emission source configured to emit a primary blue light; and
a wavelength-converting element comprising a red phosphor material having a peak emission wavelength that is less than 620 nm and a green phosphor material having a peak emission wavelength that is greater than 530 nm, the wavelength-converting element configured to convert the primary blue light to a secondary light;
the light emitting device configured to emit a white light comprising the primary blue light and the secondary light, the white light having a correlated color temperature (CCT) between 1600K and 2500K and a melanopic/photopic ratio less than 0.25.