A display device is disclosed. The display device comprises: a display unit having a screen including a first region for displaying an image and a second region into which a user's touch is inputted; a sensing unit for sensing the user's touch on the second region; and a control unit for determining the length of the user's input by analyzing the sensed user's touch, and controlling the display unit such that the display unit displays, on the screen, a part or all of a plurality of icons corresponding respectively to a plurality of applications, wherein the number of icons displayed on the screen is dynamically determined according to the determined length of the user's input.