US 11,757,074 B2
Light-emitting diode display pixels with microlens stacks over light-emitting diodes
Jaein Choi, San Jose, CA (US); Joy M. Johnson, San Francisco, CA (US); Lai Wang, Fremont, CA (US); Ben-Li Sheu, Sunnyvale, CA (US); Hairong Tang, Los Gatos, CA (US); Steven E. Molesa, San Jose, CA (US); Sunggu Kang, San Jose, CA (US); and Young Cheol Yang, Sunnyvale, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Apr. 8, 2021, as Appl. No. 17/225,796.
Claims priority of provisional application 63/038,318, filed on Jun. 12, 2020.
Prior Publication US 2021/0391513 A1, Dec. 16, 2021
Int. Cl. H01L 33/58 (2010.01); H10K 50/854 (2023.01); H10K 50/858 (2023.01); H10K 50/86 (2023.01)
CPC H01L 33/58 (2013.01) [H10K 50/854 (2023.02); H10K 50/858 (2023.02); H10K 50/865 (2023.02); H01L 2933/0091 (2013.01)] 21 Claims
OG exemplary drawing
1. A display comprising:
a substrate;
a light-emitting diode formed on the substrate;
a microlens array that is formed over the light-emitting diode, wherein the microlens array comprises a plurality of first microlenses, wherein each one of the first microlenses is formed from a first material having a first index of refraction, wherein the first material is an inorganic material, and wherein the microlens array has a first width; and
a second microlens that conforms to and covers the microlens array, wherein the second microlens is formed from a second material having a second index of refraction, wherein the second material is an organic material, wherein the second index of refraction is less than the first index of refraction and wherein the second microlens has a second width that is greater than the first width.