Light source, back light unit, and display device

A display device comprising:

• a plurality of color filters;
• and
• a light source comprising a light emitting element and a light conversion layer configured to convert light emitted from the light emitting element into white light,
• wherein the light conversion layer comprises a matrix resin and a quantum dot having a core-shell structure,
• wherein the white light comprises a red light component, a green light component, and a blue light component,
• wherein the green light component has a peak wavelength of 525 nanometers to 528 nanometers and a full width at half maximum of less than or equal to 40 nanometers, and the red light component has a peak wavelength of 625 nanometers to 645 nanometers, and
• wherein a change of the full width at half maximum of the green light component and the red light component after the white light passing through the color filters is less than or equal to 3 nanometers.