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; detecting at least one valid touch from the touch information; determining that a valid touch of the at least one valid touch is included in a palm touch group by (a) detecting a palm touch (e.g., which meets a palm touch condition) among the at least one valid touch, and (b) determining valid touches (e.g., all valid touches) from a detection time of the palm touch to a predetermined backward tracking time; and non-displaying, on a display unit, the valid touch included in the palm touch group.