Light providing unit, display device including the same, and method of manufacturing display device

A display device comprising:

• a light source configured to generate a light;
• a display panel configured to display images using the light;
• a light guide having at least one surface adjacent the light source;
• and
• an optical member disposed between the light guide and the display panel,
• wherein the optical member comprises:
• a low refractive index layer on a light exit surface of the light guide;
• a first cover layer on the low refractive index layer;
• and
• a light conversion layer on the first cover layer, and the light conversion layer being configured to convert a wavelength band of an incident light,
• wherein the first cover layer comprises:
• a first barrier layer on the low refractive index layer;
• and
• a second barrier layer on the first barrier layer, the second barrier layer having a density that is lower than a density of the first barrier layer.