Optical member and display device including the same

An optical member comprising:

• a light guide plate including a surface, a first side surface crossing the surface, and a second surface opposite the first side surface;
• a low refractive index pattern disposed on the surface of the light guide plate and comprising an opening for exposing the surface of the light guide plate;
• a wavelength conversion layer disposed on the low refractive index pattern;
• and
• a passivation layer disposed on the wavelength conversion layer and covering a side surface of the wavelength conversion layer and a side surface of the low refractive index pattern at at least one side portion,
• wherein:
• the low refractive index pattern has a lower index of refraction than the light guide plate;
• and
• a ratio of an area occupied by the low refractive index pattern to an area of the surface of the light guide plate decreases in a direction away from the first side surface.

A display device comprising:

• an optical member comprising,
• a light guide plate including a light incidence surface,
• a low refractive index layer disposed on the light guide plate and having a lower index of refraction than the light guide plate,
• a wavelength conversion layer disposed on the low refractive index layer, and
• a passivation layer disposed on the wavelength conversion layer and covering a side surface of the wavelength conversion layer and a side surface of the low refractive index layer at at least one side portion;
• a light source disposed at a side of the light incidence surface of the light guide plate;
• and
• a display panel disposed on the optical member,
• wherein the low refractive index layer comprises patterns, and an area in which the low refractive index layer is disposed decreases in a direction away from the light incidence surface.