Patent ID: 9262027
Filing Date: 2016-02-16
CPC Classification: G06F

Claim Text:
1. A coordinate input device comprising: a plurality of first detection electrodes disposed in parallel to each other, a plurality of second detection electrodes intersecting the first detection electrodes; an electrode drive circuit configured to apply a drive signal to one or more of the first detection electrodes; and a detection circuit configured to detect a signal of the second detection electrode generated by the drive signal, wherein the electrode drive circuit is configured to select one or more of the first detection electrodes to which the drive signal is not applied as a reference electrode; wherein the detection circuit is configured to detect a signal of the selected reference electrode as a noise signal, and further comprising an input coordinate computing circuit configured to correct a detection result of the detection circuit on the basis of the detected noise signal of the reference electrode, and to calculate an input coordinate from the corrected detection result.