Patent ID: 8756511

Claim:
A mobile terminal, comprising: a touch screen; and a controller configured to: display a uniform image of a first enclosure and an unlock image of a second enclosure bounded by the uniform image of the first enclosure on the touch screen in response to detection of a touch input on the touch screen while the mobile terminal is in a lock state, wherein the uniform image of the first enclosure and the unlock image of the second enclosure are not displayed prior to detection of the touch input but appear on the touch screen only after the detection of the touch input on the touch screen; enlarge the unlock image of the second enclosure in response to movement of the touch input away from an initial position of the touch input, wherein the unlock image of the second enclosure is continually enlarged while the movement of the touch input away from the initial position of the touch input is maintained; and unlock the mobile terminal in response to a release of the touch input when the unlock image of the second enclosure is resized to reach or exceed a boundary of the uniform image of the first enclosure.