Patent ID: 11921939
Assignee: NINTENDO CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. An information processing system comprising:
a controller including
an operation element configured to be displaced from an initial position by a user's operation,
a restoring force imparting section configured to apply a restoring force for returning a position of the displaced operation element to the initial position,
a resistance section using a magnetorheological fluid whose viscosity changes in accordance with an intensity of a magnetic field and which serves as a resistance when the operation element is displaced from the initial position and to the initial position, and
a magnetic field generation section configured to provide the magnetic field to the magnetorheological fluid; and

a circuit capable of controlling the magnetic field generation section,
the circuit being configured to control the intensity of the magnetic field generated by the magnetic field generation section so that the viscosity of the magnetorheological fluid periodically changes at least between a first viscosity state and a second viscosity state in which the viscosity is lower than in the first viscosity state and has such a value that the operation element returns to the initial position by the restoring force.