Patent ID: 8836657

Claim:
A positional information correction device, comprising: a positional information acquisition unit configured to acquire positional information showing a position of an operation body, the position being detected by a position detection unit, from a touch sensor that includes a plurality of first electrodes wired along a first direction, a plurality of second electrodes wired along a second direction that is approximately orthogonal to the first direction, and the position detection unit that detects the position of the operation body that approaches the first and second electrodes, based on capacitance on the first and second electrodes; a capacitance value acquisition unit configured to acquire a capacitance value showing a value of the capacitance on the first and second electrodes from the touch sensor; and a positional information correction unit configured to correct the positional information that is acquired by the positional information acquisition unit, by using a first correction function that includes a first periodic function having a first amplitude A 1 of which a period is a wiring interval of the first electrodes and that corresponds to the capacitance value acquired by the capacitance value acquisition unit and a second correction function that includes a second periodic function having a second amplitude A 2 of which a period is a wiring interval of the second electrodes and that corresponds to the capacitance value acquired by the capacitance value acquisition unit.