Patent ID: 9086740
Filing Date: 2015-07-21
Classification: G06F

Abstract:
1. An operation input device configured to receive a force, the operation input device comprising: a base part including a placement surface; a plurality of inductors placed on the placement surface; a displacement member including a first surface facing the placement surface and a second surface configured to receive an application of the force, the displacement member being configured to cause an inductance of each of the plurality of inductors to vary with an approach of the first surface to the placement surface due to the application of the force on the second surface; a support member configured to support the displacement member in such a manner as to allow a displacement of the displacement member; a detection part configured to detect a variation in the inductance by feeding a first pulse signal to the each of the plurality of inductors; a control part configured to generate a magnetic field to displace the second surface by feeding a second pulse signal to the each of the plurality of inductors, the second pulse signal being different in phase from the first pulse signal; an elastic member placed on the placement surface of the base part and surrounded by the plurality of inductors, said elastic member having a dome shape; and a center key provided to the first surface of the displacement member so as to contact and be supported by the elastic member, wherein a reset signal is generated so as to prevent the detection part from operating at least when the second pulse is generated.