Display device

An optical stacking structure comprising:

• a color filter comprising a plurality of quantum dots which absorbs first light and emits at least one of second light and third light, wherein the second light and the third light are different from the first light;
• a first optical filter layer disposed on the color filter, wherein the first optical filter blocks at least a part of the first light;
• and
• a second optical filter layer disposed on the opposite side of the first optical filter based on the color filter, wherein the second optical filter transmits at least a part of the first light and reflects at least a part of the second light and the third light,
• wherein
• the first optical filter layer, the color filter and the second optical filter layer are sequentially stacked one on another,
• the first optical filter layer functions as a semi-transmission layer so that the first optical filter layer emits light around a wavelength corresponding to a resonance wavelength of a microcavity structure defined collectively by the first optical filter layer, the color filter and the second optical filter layer, and
• the second optical filter layer functions as a reflection layer so that light, except for the light around the wavelength corresponding to the resonance wavelength of the microcavity structure, goes back and forth between the first optical filter layer and the second optical filter layer.