Coordinate measurement device and method for hover sensing

Abstract

A coordinate measurement device and method for hover sensing are disclosed. According to the present invention, the coordinate measurement device comprises: a channel electrode unit including a plurality of electrodes, wherein a capacitance of at least one of the plurality of electrodes variably changes by the approach of a contact object; a driving unit for applying a positive voltage to a first electrode group among the plurality of electrodes and applying a negative voltage to a second electrode group among the plurality of electrodes; a reception unit for receiving reception signals from a plurality of electrodes in the first electrode group and a plurality of electrodes in the second electrode group, respectively; and a processor for determining the position of the contact object on the basis of the received signals. Therefore, the coordinate measurement device can detect an accurate position of the contact object approaching the coordinate measurement device, through a conventional sensing element and circuit process.