Patent ID: 8736563

Claim:
A touch detection device, comprising: a plurality of drive electrodes arranged side-by-side and extending in a direction; a plurality of detection electrodes arranged side-by-side, extending to intersect the plurality of drive electrodes, allowing an electrostatic capacitance to be formed at each of intersections of the plurality of drive electrodes and the plurality of detection electrodes, and each outputting a detection signal in response to driving of each of the drive electrodes; a signal correction section correcting the detection signals outputted from the plurality of detection electrodes, through determining a reference based on the detection signals, and through subtracting the determined reference from each of the detection signals; and a detecting section detecting an external proximity object based on corrected detection signals provided from the signal correction section, wherein the signal correction section determines, for each of the plurality of detection electrodes, a representative value of an absolute value of a sum of a touch component and a noise component both contained in the detection signal outputted from the corresponding detection electrode in a predetermined period, selects a smallest representative value from the plurality of representative values, and uses, as the reference, a representative value of a detection signal which has brought the selected smallest representative value.