US 12,284,850 B2
Laterally heterogenous wavelength-converting layer
Marcel Rene Bohmer, Eindhoven (NL); Toni Lopez, Aachen (DE); and Ken Shimizu, Sunnyvale, CA (US)
Assigned to Lumileds LLC, San Jose, CA (US)
Filed by LUMILEDS LLC, San Jose, CA (US)
Filed on Nov. 30, 2021, as Appl. No. 17/537,919.
Claims priority of provisional application 63/119,976, filed on Dec. 1, 2020.
Prior Publication US 2022/0173284 A1, Jun. 2, 2022
Int. Cl. H10H 20/851 (2025.01); H10H 20/01 (2025.01); H10H 29/14 (2025.01)
CPC H10H 20/8516 (2025.01) [H10H 29/142 (2025.01); H10H 20/0361 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a wavelength-converting optical element; and
an array comprising a plurality of microLEDs and non-light-emitting areas separating adjacent microLEDs,
wherein the wavelength-converting optical element is arranged as a solid wavelength-converting layer disposed on the array and comprises:
a plurality of first regions aligned with the plurality of microLEDs and comprising phosphor particles of a first characteristic size dispersed in, or bound together with, a first transparent material; and
a second region contiguous with the first regions, aligned with the non-light-emitting areas, and comprising phosphor particles of a second characteristic size dispersed in, or bound together with, a second transparent material, wherein the second region exhibits optical scattering greater than optical scattering exhibited by the first regions.