Display device, method of fabricating the same and head mounted display device including the same

A method of fabricating a display device, comprising:

• forming a light-emitting element layer on a semiconductor substrate comprising a display area, a non-display area around the display area in plan view, and transistors, the light-emitting element layer comprising light-emitting elements in the display area;
• forming a lens array layer on the light-emitting element layer, the lens array layer being in the display area and in a portion of the non-display area, and comprising lenses respectively overlapping the light-emitting elements, and pattern portions in the non-display area around the lenses;
• forming a resin layer on the lens array layer;
• attaching a release film to an upper surface of the resin layer to planarize the resin layer;
• and
• forming a cover layer on the lens array layer by curing the resin layer, and removing the release film.

A head mounted display device comprising:

• a frame configured to be worn on a user's body, and corresponding to user's left and right eyes;
• display devices in the frame;
• and
• eyepieces respectively on the display devices,
• wherein the display devices comprise:
• a semiconductor substrate comprising a display area, a non-display area around the display area in plan view, and transistors;
• a light-emitting element layer above the semiconductor substrate, and comprising light-emitting elements in the display area;
• an encapsulation layer above the light-emitting element layer;
• a color filter layer above the encapsulation layer, and comprising color filters respectively overlapping the light-emitting elements;
• a lens array layer above the color filter layer, in the display area, in a portion of the non-display area, comprising lenses respectively overlapping the light-emitting elements in the display area and having a convex cross-sectional shape, and comprising pattern portions in the non-display area around the lenses;
• and
• a cover layer above the lens array layer.