Electronic device and method of controlling the same

An electronic device, comprising:

• a housing comprising:
• a first plate facing a first direction,
• a second plate facing a second direction opposite to the first direction, and
• a side member enclosing a space between the first plate and the second plate, the side member being attached to or integrally formed with at least one of the first plate or the second plate;
• a display positioned inside the housing and configured to form a display area through the first plate;
• a first touch panel positioned inside the housing and interposed between the display and the first plate or integrally formed with the display, the first touch panel comprising a first plurality of sensing elements having a first touch point density;
• a second touch panel positioned inside the housing, the second touch panel being adjacent to the side member and oriented to face a portion of the side member, the second touch panel comprising a second plurality of sensing elements having a second touch point density lower than the first touch point density;
• and
• a processor positioned inside the housing and functionally connected to the display, the first touch panel, and the second touch panel.