Display device

A display device comprising:

• a first substrate comprising a display area and a non-display area around the display area;
• a plurality of subpixels in the display area and comprising a plurality of light emitting elements;
• a bank layer surrounding the subpixels in the display area;
• an upper bank layer on the bank layer;
• a plurality of wavelength conversion layers and a light transmitting layer on the plurality of light emitting elements of the subpixels and located in areas surrounded by the upper bank layer;
• and
• a plurality of color filter layers on the plurality of wavelength conversion layers and the light transmitting layer, wherein each of the plurality of subpixels further comprises:
• a first electrode on the first substrate;
• a second electrode spaced from the first electrode in a second direction;
• an optical layer on the first electrode and the second electrode, the optical layer comprising a first layer and a second layer having a different refractive index from the first layer,
• wherein the plurality of light emitting elements is located on the optical layer, the first electrode, and the second electrode,
• wherein the optical layer comprises a plurality of pair layers, each of the plurality of pair layers comprising the first layer and the second layer, and wherein the first layer and the second layer are alternately stacked.