Contact detecting device for multi-touch sensing

A contact detecting device comprising:

• a contact responding section configured to produce an electric change in response to an object to be detected coming into contact with or proximity to a detecting surface, the contact responding section including a plurality of driving electrodes extending in a first direction;
• a driving scanning section configured to scan application of driving voltage to individual ones of the plurality of driving electrodes in a second direction or a direction opposite to the second direction;
• a plurality of detecting lines extending in the second direction such that each of the plurality of detecting lines intersects the driving electrodes;
• and
• a detecting section configured to detect occurrence of the electric change from a voltage change in at least one of the plurality of detecting lines to identify a position of the occurrence,
• wherein
• the driving scanning section performs the scanning so that two or more driving electrodes are driven simultaneously,
• the two or more driving electrodes include at least one first drive electrode and at least one second drive electrode that are driven simultaneously,
• a first voltage is applied to the at least one first drive electrode,
• a second voltage, which is different from the first voltage, is applied to the at least one second drive electrode that is other than the at least one first drive electrode,
• and
• the detecting sections identifies the position in which the object to be detected is in contact or in proximity on a basis of a pattern of the voltage change of the detecting lines, the pattern of the voltage change occurring according to a difference in the manner of the intersecting between the detecting lines and the two or more driving electrodes.