US 12,218,289 B2
Packaged white light emitting device comprising photoluminescence layered structure
Jun-Gang Zhou, Fremont, CA (US); Gang Wang, Sunnyvale, CA (US); and Yi-Qun Li, Danville, CA (US)
Assigned to Bridgelux, Inc., Fremont, CA (US)
Filed by Intematix Corporation, Fremont, CA (US)
Filed on Apr. 18, 2023, as Appl. No. 18/135,925.
Application 18/135,925 is a continuation of application No. 17/379,272, filed on Jul. 19, 2021, granted, now 11,631,792, issued on Apr. 18, 2023.
Application 17/379,272 is a continuation in part of application No. PCT/US2020/023095, filed on Mar. 17, 2020.
Claims priority of provisional application 62/886,317, filed on Aug. 13, 2019.
Claims priority of provisional application 62/820,249, filed on Mar. 18, 2019.
Prior Publication US 2023/0387358 A1, Nov. 30, 2023
Int. Cl. H01L 33/50 (2010.01); C09K 11/61 (2006.01); C09K 11/66 (2006.01); C09K 11/77 (2006.01); H01L 25/075 (2006.01); H01L 33/60 (2010.01)
CPC H01L 33/502 (2013.01) [C09K 11/616 (2013.01); C09K 11/665 (2013.01); C09K 11/77348 (2021.01); C09K 11/7774 (2013.01); H01L 25/0753 (2013.01); H01L 33/60 (2013.01); H01L 2933/0041 (2013.01); H01L 2933/0058 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A light emitting device comprising:
a cavity having a cavity floor;
a first Light Emitting Diode (LED) comprising a first LED chip for generating light with a dominant wavelength from 440 nm to 470 nm and a first photoluminescence layer at least partially covering a light emitting face of the first LED chip;
a second LED chip for generating light with a dominant wavelength from 440 nm to 470 nm; and
a second photoluminescence layer covering the first LED and the second LED chip, the second photoluminescence layer comprising a photoluminescence material for generating light with a peak emission wavelength from 500 nm to 650 nm,
wherein the first LED and the second LED chip are mounted on the cavity floor; and
wherein the first photoluminescence layer comprises at least 75 weight percent (wt %) of a manganese-activated fluoride photoluminescence material of a total photoluminescence material content of the first photoluminescence layer.