Display device

A display device comprising:

• a base layer;
• a circuit element layer disposed on the base layer;
• a light emitting element layer disposed on the circuit element layer and electrically connected to the circuit element layer;
• and
• a thin-film encapsulation layer disposed on the circuit element layer and the light emitting element layer to encapsulate the circuit element layer and the light emitting element layer,
• wherein the thin-film encapsulation layer includes:
• a first inorganic layer disposed on the light emitting element layer,
• an organic layer disposed on the first inorganic layer, and
• a second inorganic layer disposed on the organic layer,
• wherein at least one of the first or second inorganic layers includes first inorganic sub-layers having a first refractive index and second inorganic sub-layers having a second refractive index different from the first refractive index,
• wherein the first inorganic sub-layers and the second inorganic sub-layers are alternately disposed,
• wherein a thickness of each of the second inorganic sub-layers is determined based on a transmittance efficiency of blue light.