Display device and electronic device including the same

An electronic device including a display, the electronic device comprising:

• a housing;
• a window mounted on a front surface of the housing;
• a first substrate spaced apart from the window;
• an optical adhesive configured to attach the window to the first substrate;
• a light-polarizer configured to transmit a designated wavelength of light;
• a second substrate stacked on at least a portion of the first substrate;
• a filler flow restricting structure disposed in a space between the window and the first substrate and disposed in a corner of both end edges of the first substrate when viewed from above an upper surface of the first substrate;
• and
• a filler at least partially contacting the filler flow restricting structure and configured to seal the space, wherein the optical adhesive, the light-polarizer, and the second substrate have a stack structure, and wherein the stack structure is disposed between the window and the first substrate to define the space between the window and the first substrate,
• wherein the filler flow restricting structure includes at least one of a hydrophilic material or a hydrophobic material, and the filler comprises a hydrophobic material when the filler flow restricting structure comprises the hydrophilic material or a hydrophilic material when the filler flow restricting structure comprises the hydrophobic material.