In one embodiment, a control method for a touch sensor panel is disclosed. The method includes obtaining touch information on the touch sensor panel from which an electrical signal outputted is changed according to a touch, and detecting at least one valid touch from the touch information. It is determined that a valid touch of the at least one valid touch is included in a palm touch group by (a) detecting a palm touch, which meets a palm touch condition, among the at least one valid touch, and (b) determining that the detected palm touch and the valid touch occur within a predetermined time period. A display unit displays an input corresponding to each of the at least one valid touch other than the valid touch included in the palm touch group.