Patent ID: 7161583

Claim:
An input device comprising: a ring-shaped resistor including: a pair of first electrodes provided along a first direction; and a pair of second electrodes provided along a second direction orthogonal to the first direction; a ring-shaped conductor facing the resistor across a clearance; and a controller, connected to the pair of first electrodes, the pair of second electrodes and the conductor, for successively applying a voltage between the first electrodes and between the second electrodes when the resistor and the conductor contact each other, wherein the controller determines an angular position of contact between the resistor and the conductor from one of: (A) a resultant vector of a vector that is directed in the first direction and detected based on a voltage output from the conductor when the voltage is applied between the first electrodes and a vector that is directed in the second direction and detected based on a voltage output from the conductor when the voltage is applied between the second electrodes; and (B) a mean value of an angle, which is obtained from the voltage output from the conductor when the voltage is applied between the first electrodes, and an angle, which is obtained from the voltage output from the conductor when the voltage is applied between the second electrodes.