Mobile terminal and control method thereof

A method of controlling a mobile terminal comprising an acceleration sensor configured to sense a movement of the mobile terminal, the method comprising:

• activating, via a controller, a touch screen in which illumination is turned on, said touch screen comprising a display and a touch sensor, and configured to sense a touch applied to the touch screen;
• displaying, via the controller, screen information on the activated touch screen;
• turning off, via the controller, the display and executing a lock function upon no touch being performed on the touch screen for a predetermined time;
• in response to a predetermined number of successive tap inputs being sensed by the acceleration sensor or the touch sensor within a reference time period after the display is turned off, turning on the display and displaying a lock screen corresponding to the lock function;
• in response to a last tap input among the predetermined number of successive tap inputs sensed by the acceleration sensor or the touch sensor being held on the touch screen for more than a predetermined period of time, displaying a peek area on the lock screen, wherein the peek area includes a first portion of the screen information previously displayed on the activated touch screen;
• in response to the last tap input being dragged a distance away from a hold location of the last tap input, increasing a size of the peek area based on the distance away from the hold location and displaying the first portion of the screen information and a second portion of the screen information within the peek area on the lock screen;
• and
• maintaining the display to be turned off or display the lock screen when a user input which does not match the predetermined number of successive tap inputs is sensed within the reference time period or the predetermined number of successive tap inputs is sensed after the reference time period.