Display device and electronic device including the same

An electronic device comprising at least one display device, wherein the at least one display device comprises:

• a substrate comprising a display area and a non-display area around the display area;
• a light emitting element on the substrate;
• a capping layer comprising a first capping layer arranged on the light emitting element and having a first refractive index, a second capping layer arranged on the first capping layer and having a second refractive index that is higher than the first refractive index, and a third capping layer arranged on the second capping layer and having a third refractive index that is lower than the second refractive index;
• and
• a first encapsulation layer arranged on the capping layer, a refractive index of the first encapsulation layer being higher than the third refractive index of the third capping layer, and
• wherein:
• the first capping layer and the second capping layer comprise different materials,
• the first refractive index of the first capping layer is in a range of about 1.65 to about 1.80, and
• a height of the first capping layer is lower than a height of the second capping layer by about 20% or more.