Display device and manufacturing method thereof

A display device comprising:

• a display substrate;
• sub-pixels on the display substrate, each of the sub-pixels comprising:
• a first electrode and a second electrode on the display substrate and spaced apart from each other;
• light emitting elements between the first electrode and the second electrode;
• an insulating layer covering the light emitting elements;
• a protective pattern on the insulating layer and overlapping one of the light emitting elements;
• and
• a bank on the insulating layer at a boundary of one of the sub-pixels;
• and
• a color control layer on the insulating layer, and directly covering the protective pattern.

A display device comprising:

• a display substrate;
• sub-pixels on the display substrate, each of the sub-pixels comprising:
• a first electrode and a second electrode on the display substrate and spaced apart from each other;
• light emitting elements between the first electrode and the second electrode;
• an insulating layer covering the light emitting elements;
• a protective pattern on the insulating layer and overlapping one of the light emitting elements;
• and
• a bank on the insulating layer at a boundary of one of the sub-pixels;
• and a color control layer on the insulating layer,
• wherein a refractive index of the protective pattern is smaller than a refractive index of the color control layer.