Lighting device and method for manufacturing the same

A lighting device comprising:

• a light-emitting element layer;
• a first resin layer over the light-emitting element layer;
• a second resin layer over the first resin layer;
• and
• a plurality of projections each comprising:
• an apex inside the first resin layer;
• and
• a flat surface in a same plane as an interface between the first resin layer and the second resin layer;
• a barrier layer over the light-emitting element layer;
• and
• a resin substrate over the second resin layer, the resin substrate comprising an uneven structure at an interface with air,
• wherein:
• the barrier layer has a first refractive index;
• the first resin layer has the first refractive index;
• the second resin layer has a second refractive index that is lower than the first refractive index and higher than a refractive index of the air;
• the plurality of projections has the second refractive index;
• and
• the resin substrate has the second refractive index.