US 12,302,671 B2
Lighting device
Hyun Hee Chae, Seoul (KR); and Jung Ho Lee, Seoul (KR)
Assigned to LG INNOTEK CO., LTD., Seoul (KR)
Appl. No. 17/626,151
Filed by LG INNOTEK CO., LTD., Seoul (KR)
PCT Filed Jul. 3, 2020, PCT No. PCT/KR2020/008728
§ 371(c)(1), (2) Date Jan. 11, 2022,
PCT Pub. No. WO2021/010630, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 10-2019-0084540 (KR), filed on Jul. 12, 2019.
Prior Publication US 2022/0246807 A1, Aug. 4, 2022
Int. Cl. H01L 33/54 (2010.01); H01L 25/075 (2006.01); H01L 33/58 (2010.01); H10H 20/853 (2025.01); H10H 20/855 (2025.01); H10H 20/01 (2025.01)
CPC H10H 20/853 (2025.01) [H01L 25/0753 (2013.01); H10H 20/855 (2025.01); H10H 20/0363 (2025.01)] 16 Claims
OG exemplary drawing
 
1. A lighting device comprising:
a substrate;
a light emitting device disposed on the substrate;
a resin layer disposed on the light emitting device and covering the light emitting device;
a diffusion layer disposed on the resin layer;
an optical pattern disposed between the diffusion layer and the resin layer; and
a cover layer surrounding the optical pattern and disposed on the resin layer,
wherein the optical pattern includes a first optical pattern disposed under the diffusion layer, a second optical pattern disposed under the first optical pattern, and a third optical pattern disposed under the second optical pattern,
wherein the first to third optical patterns overlap the light emitting device in a vertical direction from a lower surface of the substrate toward an upper surface of the diffusion layer,
wherein the first to third optical patterns have different areas and is stacked in the vertical direction,
wherein the area of the second optical pattern is larger than the area of the third optical pattern,
wherein a plurality of air gaps disposed between the cover layer and the resin layer, and
wherein the plurality of air gaps is in contact with the resin layer.