User terminal device for supporting user interaction and methods thereof

摘要

A method of controlling a user terminal device including a touch screen divided into a main area and at least one sub area that is smaller than the main area. The touch screen includes a first surface including the main area, a second surface extending from the first surface and including the at least one sub area, and wherein the second surface is curved or bent with respect to a plane of the first surface is provided. The method includes performing an unlocking operation to activate the user terminal device, in response to a first pinch gesture being input on the at least one sub area while the user terminal device is locked; and performing a locking operation to inactivate the user terminal device, in response to a second pinch gesture being input on the at least one sub area, while the user terminal device is unlocked.