Electronic device including waterproof structure

An electronic device comprising:

• a housing including:
• a through hole,
• a first region having a first height, and
• a second region having a second height different from that of the first region;
• an electronic component disposed within the housing;
• a display including a transparent cover and a display panel, the display panel disposed in the first region of the housing;
• and
• a seal member to seal at least a portion of a space formed between the display and the housing, the seal member including:
• a first seal member attaching the display to the housing,
• a second seal member attaching the display to the housing, the second seal member disposed between a portion of the display and the housing as at least partially surrounding the electronic component in proximity to a top peripheral portion of the display;
• and
• a third seal member disposed in a space formed by the display, the housing, the first seal member and the second seal member such that the third seal member is in contact with the first seal member and the second seal member,
• wherein a semisolid or liquid material is inserted through the through hole in at least a portion of the space so as to form the third seal member.