Patent ID: 8599175

Claim:
An input detection circuit comprising: an acquisition portion that acquires at least one potential of a first conductive membrane formed on a first surface of a first substrate, and a second conductive membrane formed on a second surface of a second substrate provided at a position away from the first substrate, the second surface being opposed to the first conductive membrane; a first control portion that selectively controls switches connected to the first conductive membrane and the second conductive membrane to periodically apply a voltage to the first conductive membrane at intervals shorter than a time period of a normal input operation, at least one switch of the switches being connected to the first conductive membrane and at least one other switch of the switches being connected the second conductive membrane; and a first detection portion that detects an input operation by detecting the generation of a current that flows from the first conductive membrane to which the voltage is applied by the first control portion, to the second conductive membrane based on the potential acquired by the acquisition portion.