Gesture based unlocking of a mobile terminal

PURPOSE: A gesture based unlocking method of a mobile terminal is provided to unlock the locking mobile terminal and offer a charming convenient user interface (UI). CONSTITUTION: When touch is sensed on a touch screen during a locking state of a mobile terminal, a controller displays a fixing image and an unlocking image on the touch screen (2302). The fixing image has a first border in response to the touch. The unlocking image has a second border which is surrounded by the fixing image. When the touch is moved from an initial position while maintaining a touch state, the unlocking image is enlarged (2304). When the unlocking image reaches the boundary of the fixing image or is deviated from the boundary of the fixing image, the locking of the mobile terminal is unlocked according to the unlocking of the touch (2306). [Reference numerals] (2302) Displays a fixing image and an unlocking image on a touch screen a mobile terminal; (2304) Enlarge the unlocking image having a second border in response to the touch in the touch screen; (2306) Unlock the mobile terminal according to the unlocking of the touch when the unlocking image reaches the boundary of the fixing image or is deviated from the boundary of the fixing image