Electronic device and method for controlling display using piezoelectric element

A method for controlling a display, the method comprising:

• allowing a vibration element positioned under the display to vibrate the display such that the display outputs a first signal having a first waveform;
• obtaining a second signal having a second waveform through a microphone in response to the output first signal;
• turning off the display based on a result obtained by comparing the first waveform and the second waveform which indicates that an approaching object is within a predefined distance;
• allowing the vibration element to vibrate the display at a first frequency band such that the display outputs the first signal;
• and
• allowing the vibration element to vibrate the display at a second frequency band such that the display outputs sound,
• wherein the first signal is an ultrasonic wave,
• wherein the second signal is a signal that corresponds to the first signal reflected and received from an object, and
• wherein a minimum value of the first frequency band is larger than a maximum value of the second frequency band.

A storage medium storing computer-readable instructions that, when executed by an electronic device, cause the electronic device to:

• allow a vibration element positioned under a display to vibrate the display such that the display outputs a first signal having a first waveform;
• obtain a second signal having a second waveform through a microphone in response to the output first signal;
• turn off the display based on a result obtained by comparing the first waveform and the second waveform which indicates that an approaching object is within a predefined distance;
• allow the vibration element to vibrate the display at a first frequency band such that the display outputs the first signal;
• and
• allow the vibration element to vibrate the display at a second frequency band such that the display outputs sound,
• wherein the first signal is an ultrasonic wave,
• wherein the second signal is a signal that corresponds to the first signal reflected and received from an object, and
• wherein a minimum value of the first frequency band is larger than a maximum value of the second frequency band.