Input device

An input device comprising:

• an electrode part formed of electrode pieces;
• a switching circuit formed of a plurality of switches connected to the electrode pieces respectively;
• a driving circuit and a detecting circuit both of which are connected to the electrode part via the switching circuit;
• and
• a controller connected to the driving circuit, the switching circuit, and the detecting circuit,
• wherein the controller controls the respective switches such that the electrode pieces are individually opened or connected to one of the driving circuit and the detecting circuit;
• the controller allows generating an electric field over at least first one of the electrode pieces, the at least first one electrode piece being connected to the driving circuit
• the electric field is applied to the detecting circuit through at least second one of the electrode pieces via a space over the electrode part, the at least second one electrode piece being connected to the detecting circuit;
• and
• the controller determines, based on a detection result of the detecting circuit, an electrode piece, among the electrode pieces, to which an object to be detected has gotten close.