US 11,705,543 B2
White light emitting device with dimming control
Tao Xu, Fremont, CA (US); Aaron Merrill, Fremont, CA (US); and Yi-Qun Li, Danville, CA (US)
Assigned to Bridgelux, Inc., Fremont, CA (US)
Filed by Bridgelux, Inc., Fremont, CA (US)
Filed on Aug. 26, 2021, as Appl. No. 17/412,258.
Application 17/412,258 is a continuation of application No. 16/293,176, filed on Mar. 5, 2019, granted, now 11,164,999.
Prior Publication US 2021/0384387 A1, Dec. 9, 2021
Int. Cl. H01L 25/075 (2006.01); H01L 33/50 (2010.01); H01L 33/58 (2010.01)
CPC H01L 33/504 (2013.01) [H01L 25/0753 (2013.01); H01L 33/58 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A white light emitting device comprising:
a substrate;
a first set of LEDs, comprising a plurality of first LEDs disposed on said substrate,
a first photoluminescence material disposed over said plurality of first LEDs;
a second set of LEDs, comprising a plurality of second LEDs disposed on said substrate, wherein said first LEDs and said second LEDs emit blue light at substantially the same wavelength, and wherein said first set of LEDs is separate from said second set of LEDs;
a second photoluminescence material disposed over said plurality of second LEDs, said second photoluminescence material having a composition different from said first photoluminescence material; and
a dimming control connected only to said first set of LEDs and to said second set of LEDs;
wherein an emission product of the white light emitting device is a combination of light emitted from (i) a combination of said first LEDs and said first photoluminescence material, and (ii) a combination of said second LEDs and said second photoluminescence material; and
wherein said dimming control is actuable to modify said emission product.