US 12,484,423 B2
Light emitting element and display device with relationship between refractive indices of lens and covering layer
Chugen Hamachi, Tokyo (JP); and Yosuke Motoyama, Kanagawa (JP)
Assigned to Sony Semiconductor Solutions Corporation, Kanagawa (JP)
Appl. No. 18/012,385
Filed by Sony Semiconductor Solutions Corporation, Kanagawa (JP)
PCT Filed Jul. 28, 2021, PCT No. PCT/JP2021/027938
§ 371(c)(1), (2) Date Dec. 22, 2022,
PCT Pub. No. WO2022/030332, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 2020-133056 (JP), filed on Aug. 5, 2020.
Prior Publication US 2023/0276682 A1, Aug. 31, 2023
Int. Cl. H10K 59/80 (2023.01); H10K 59/12 (2023.01)
CPC H10K 59/879 (2023.02) [H10K 59/1201 (2023.02); H10K 59/8792 (2023.02)] 13 Claims
OG exemplary drawing
 
1. A light emitting element comprising:
a light emitting unit;
an intermediate layer covering the light emitting unit;
an optical path control unit disposed on a part of the intermediate layer and having positive optical power; and
a covering layer covering an outer region of the intermediate layer surrounding a part of the intermediate layer on which the optical path control unit is formed and the optical path control unit, wherein
when a refractive index of a material constituting a part of the intermediate layer in contact with the optical path control unit is represented by n0, a refractive index of a material constituting the optical path control unit is represented by n1, and a refractive index of a material constituting the covering layer is represented by n2, a relationship n0≥n1>n2 is satisfied, and
a layer thickness of an end part of the covering layer located on the outer region of the intermediate layer is more than 0 μm and 1.0 μm or less.