Display device having improved light emission and color reproducibility

A display device comprising:

• a display panel;
• a color conversion panel overlapping the display panel;
• and
• an optical bonding layer positioned between the display panel and the color conversion panel,
• wherein the color conversion panel includes:
• a substrate;
• a color conversion layer and a transmission layer positioned between the substrate and the display panel;
• a first capping layer positioned between the color conversion layer and the transmission layer, and the display panel;
• a second capping layer positioned between the first capping layer and the display panel;
• and
• an optical layer positioned in at least one of between the first capping layer and the second capping layer and between the second capping layer and the optical bonding layer,
• wherein at least one of an interface of the first capping layer and the optical layer and an interface of the second capping layer and the optical layer is configured to generate a total reflection of light, and
• the light is incident from the color conversion layer and the transmission layer toward the display panel.