<p>A detector in a touch sensor system detects a touch region in accordance with an intensity threshold for determining the intensity of an electrostatic capacitance signal in a detection region (R1) in order to determine whether or not touch input has been made by a finger, and a peripheral threshold which is lower than the intensity threshold and is provided in order to determine the intensity of the electrostatic capacitance signal in a plurality of peripheral regions (R2) surrounding the detection region (R1).</p>
