An electronic device (600, 700) comprising: a display (630, 730) including a touch panel (610, 710); a fingerprint sensor (650, 750) configured to sense a fingerprint input through a partial area of the display; a display drive circuit (640, 740) electrically connected to the display to drive the display; an application processor (660, 760); a touch sensor (610, 710) configured to sense a signal related to a touch; and a touch IC (620, 720) configured to: control the touch sensor to detect an input by an external object with respect to the partial area of the display while the application processor is in a low power state; activate the partial area of the display while the application processor is in the low power state; detect a pattern drawn on the external object using the fingerprint sensor (650, 750) while the application processor is in the low power state; determine whether the input with respect to the partial area is caused by a fingertip by comparing the pattern of the external object with a previously-stored pattern while the application processor is in the low power state; discard the input without authentication when the input by the external object is not caused by the fingertip such that the application processor keeps in the low power state; and allow the fingerprint sensor to obtain fingerprint information of the input, when the input by the external object is caused by the fingertip, wherein the fingerprint sensor is configured to obtain fingerprint information of the input using light output from the partial area of the display and provides the fingerprint information to the application processor, when the input by the external object is caused by the fingertip, and wherein the application processor is configured to authenticate the fingerprint information for unlocking the electronic device. a display (630, 730) including a touch panel (610, 710); a fingerprint sensor (650, 750) configured to sense a fingerprint input through a partial area of the display; a display drive circuit (640, 740) electrically connected to the display to drive the display; an application processor (660, 760); a touch sensor (610, 710) configured to sense a signal related to a touch; and a touch IC (620, 720) configured to: control the touch sensor to detect an input by an external object with respect to the partial area of the display while the application processor is in a low power state; activate the partial area of the display while the application processor is in the low power state; detect a pattern drawn on the external object using the fingerprint sensor (650, 750) while the application processor is in the low power state; determine whether the input with respect to the partial area is caused by a fingertip by comparing the pattern of the external object with a previously-stored pattern while the application processor is in the low power state; discard the input without authentication when the input by the external object is not caused by the fingertip such that the application processor keeps in the low power state; and allow the fingerprint sensor to obtain fingerprint information of the input, when the input by the external object is caused by the fingertip, control the touch sensor to detect an input by an external object with respect to the partial area of the display while the application processor is in a low power state; activate the partial area of the display while the application processor is in the low power state; detect a pattern drawn on the external object using the fingerprint sensor (650, 750) while the application processor is in the low power state; determine whether the input with respect to the partial area is caused by a fingertip by comparing the pattern of the external object with a previously-stored pattern while the application processor is in the low power state; discard the input without authentication when the input by the external object is not caused by the fingertip such that the application processor keeps in the low power state; and allow the fingerprint sensor to obtain fingerprint information of the input, when the input by the external object is caused by the fingertip, wherein the fingerprint sensor is configured to obtain fingerprint information of the input using light output from the partial area of the display and provides the fingerprint information to the application processor, when the input by the external object is caused by the fingertip, and wherein the application processor is configured to authenticate the fingerprint information for unlocking the electronic device.