Electronic device comprising piezoelectric device, and touch input detection method using piezoelectric device

An electronic device comprising:

• a housing;
• a piezoelectric element disposed to one surface of the housing in an inner space of the housing;
• a short-range communication circuit;
• a sound output circuit;
• a touch sensing circuit;
• at least one switching circuit configured to control an electric connection between the piezoelectric element and the sound output circuit or an electric connection between the piezoelectric element and the touch sensing circuit;
• and
• at least one processor, comprising processing circuitry, operatively connected to the piezoelectric element, the short-range communication circuit, the sound output circuit, the touch sensing circuit, and the at least one switching circuit,
• wherein at least one processor, individually and/or collectively, is configured to:
• based on a communication connection to an external electronic device being established through the short-range communication circuit in a state in which the piezoelectric element and the sound output circuit are electrically connected, control the at least one switching circuit such that the piezoelectric element and the touch sensing circuit are electrically connected;
• based on a touch input being detected from the piezoelectric element through the touch sensing circuit, control the at least one switching circuit such that the piezoelectric element and the sound output circuit are electrically connected, and output a sound through the sound output circuit;
• and
• control the at least one switching circuit such that, after outputting the sound, the piezoelectric element and the touch sensing circuit are electrically connected.