US 12,013,089 B2
Light-emitting device
Satoshi Shichijo, Tokushima (JP); Tatsuya Hayashi, Tokushima (JP); Yusuke Hayashi, Anan (JP); and Masahiro Okazaki, Anan (JP)
Assigned to NICHIA CORPORATION, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Jul. 14, 2023, as Appl. No. 18/352,571.
Claims priority of application No. 2022-116500 (JP), filed on Jul. 21, 2022; application No. 2022-192240 (JP), filed on Nov. 30, 2022; and application No. 2023-067600 (JP), filed on Apr. 18, 2023.
Prior Publication US 2024/0027034 A1, Jan. 25, 2024
Int. Cl. F21K 9/64 (2016.01); F21K 9/68 (2016.01); F21S 41/176 (2018.01); F21Y 115/10 (2016.01)
CPC F21K 9/64 (2016.08) [F21K 9/68 (2016.08); F21S 41/176 (2018.01); F21Y 2115/10 (2016.08)] 20 Claims
OG exemplary drawing
 
1. A light-emitting device comprising:
a light-emitting element including
a support substrate having a first surface and a second surface located on a side opposite to the first surface, and
a light-emitting portion located on the second surface of the support substrate and including a semiconductor layered body including a first semiconductor layer, a light-emitting layer and a second semiconductor layer in this sequence;
a light-transmissive member having
a first upper surface,
a second upper surface,
a lower surface located on a side opposite to the first upper surface and the second upper surface, and facing the first surface of the support substrate of the light-emitting element,
a first lateral surface contiguous with the first upper surface and the second upper surface,
a second lateral surface contiguous with the second upper surface and the lower surface, and
a third lateral surface contiguous with the first upper surface and the lower surface; and
a light adjustment member exposing the first upper surface of the light-transmissive member and covering the second upper surface and the first lateral surface of the light-transmissive member, wherein
the light-transmissive member has a thickness from the lower surface to the first upper surface larger than a thickness from the lower surface to the second upper surface,
the light-emitting device includes, on an upper surface, a light-emitting region including a first light-emitting region and a second light-emitting region located next to the first light-emitting region,
in a plan view, the first light-emitting region has the first upper surface of the light-transmissive member, the second light-emitting region has the second upper surface of the light-transmissive member, and an area of the second light-emitting region is in a range from 35% to 95% of an area of the light-emitting region, and
a boundary between the first light-emitting region and the second light-emitting region includes a first point and a second point on a perimeter of the light-emitting region, and a straight line connecting the first point and the second point extends across the light-emitting region in the plan view.