Electronic device including an optical sensor mounted on back surface of a display

An electronic device comprising:

• a display panel including pixels;
• a cover panel disposed on a rear surface of the display panel and including at least two first openings;
• a support member disposed on a rear surface of the cover panel and including at least one second opening corresponding to the at least two first openings;
• an optical sensor including a light emitting unit and a light receiving unit disposed to emit light to the outside of the display panel through at least a portion of the at least two first openings and at least a portion of the at least one second opening, and a light receiving unit;
• and
• a partition wall member disposed in at least a partial region of the at least one second opening,
• wherein at least a part region of the partition wall member is disposed between the light emitting unit and the light receiving unit to separate the light emitting unit and the light receiving unit.