An electronic device including a window defining an appearance of a front surface of the electronic device; a display module disposed below the window; a touch sensor disposed between the window and the display module; a fingerprint sensor disposed below the display module; and a controller configured to in response to the touch sensor receiving a single touch input while the display module is in a deactivated state, display a graphic image at a region of the display module overlapped with the fingerprint sensor; in response to the touch sensor receiving a double touch input while the display module is in the deactivated state, display a full screen image on the display module and the graphic image at the region of the display module overlapped with the fingerprint sensor; control the fingerprint sensor to detect fingerprint information through the graphic image at the region of the display module; and perform an authentication procedure to release a lock state of the electronic device when the detected fingerprint information matches pre-stored fingerprint information.