Display device

A display device comprising:

• a substrate;
• a light-emitting element on the substrate;
• a planarization layer on the light-emitting element;
• a first refractive index layer outside a light emission region of the light-emitting element on the planarization layer and including a refraction inclination surface refracting light emitted from the light-emitting element in a front direction;
• a second refractive index layer outside the light emission region of the light-emitting element, wherein the second refractive index layer is adjacent to and extends over a portion of the first refractive index layer to be in contact with the refraction inclination surface and including a total reflection inclination surface totally reflecting light emitted from the light-emitting element in the front direction and having a larger refractive index than a refractive index of the first refractive index layer;
• and
• a third refractive index layer on the second refractive index layer to be in contact with the total reflection inclination surface and having a larger refractive index than the refractive index of the second refractive index layer.

A display device comprising:

• a substrate;
• a light-emitting element on the substrate;
• a first refractive index layer comprising:
• a total reflection inclination surface configured to totally reflect light emitted from the light-emitting element in a front direction;
• and
• a refraction inclination surface configured to refract light emitted from the light-emitting element in the front direction and sloping from a top of the refraction inclination surface, that is a furthest point of the refraction inclination surface along a light emission direction of the light-emitting element, to a bottom of the refraction inclination surface, that is a closest point of the refraction inclination surface along the light emission direction, in a direction away from the light-emitting element,
• wherein a region wherein a light is emitted in the front direction in one pixel includes a front light region corresponding a light emission region of the light-emitting element, a total reflection light region corresponding to the total reflection inclination surface, and a refraction light region corresponding to the refraction inclination surface, and
• wherein the refraction inclination surface is an interface between the first refractive index layer having a first refractive index and a second refractive index layer having a second refractive index that is smaller than the first refractive index.