Display Device and Backlight Unit

A display device comprising:

• a display panel;
• a backlight unit supplying light to the display panel;
• and
• a conversion sheet between the backlight unit and the display panel,
• wherein the conversion sheet comprises blue light quantum dots, hollow scatterers, a base layer, and at least one conversion pattern having a second refractive index different from a first refractive index of the base layer,
• wherein a top portion of the at least one conversion pattern has a greater area than a bottom portion of the at least one conversion pattern.

A backlight unit comprising:

• a plurality of light sources;
• a light guide plate into which light emitted from the plurality of light sources enters;
• and
• a prism sheet comprising a prism base on the light guide plate and a plurality of prisms located on the prism base,
• wherein the prism base comprises alternately stacked first portion having a third refractive index and second portion having a fourth refractive index.