US Patent 10126587 Display device

A display device includes a light source which provide a first light, a color filter including a plurality of quantum dots which absorbs the first light and emits at least one of second light and third light that are different from the first light, a first optical filter layer disposed on the color filter, and a second optical filter layer disposed between the light source and the color filter. The first optical filter blocks at least a part of the first light, and 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.