US Patent 7348898 Capacitive input device

A input device is provided which includes a clock signal generator that generates a clock signal; a delay unit that has a capacitive sensor where an electrode is formed on a substrate; protective sheets each of which is formed of a dielectric and which are disposed on front and rear surfaces of the capacitive sensor; a logical product unit that transmits an output signal on the basis of a clock signal obtained from the clock signal generator and a delay signal obtained from the delay unit; and a controller that makes a predetermined program executed in accordance with an output signal obtained on the basis of the logical product unit.