| CPC H01F 7/064 (2013.01) [B06B 1/045 (2013.01); H01F 7/081 (2013.01)] | 7 Claims |
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1. A control device that controls an electromagnetic actuator, the electromagnetic actuator driving an operation device in one direction of a vibration direction of the operation device to vibrate the operation device, the operation device being supported in an elastically vibratable manner by an elastic support part, wherein
the control device includes a circuit, the circuit configured to apply a driving signal to a coil of the electromagnetic actuator to drive the operation device in the one direction to vibrate the operation device in response to a touch operation on the operation device, the driving signal being a combination of a main driving signal applied first and a plurality of sub-driving signals applied after the main driving signal, the plurality of the sub-driving signals being applied during an attenuation period to extend or shorten a length of the attenuation period, and the attenuation period being a period in which the vibration started by applying the main driving signal continues while being attenuated, wherein
the plurality of the sub-driving signals have an offset voltage and a wave train, the offset voltage being offset from a zero voltage, each of the cycles of the wave train having a variable voltage, the variable voltage varying with the offset voltage as a center value, a waveform that indicates a variation in the variable voltage being a sine function curve or a cosine function curve, and the circuit applies the plurality of the sub-driving signals while changing the offset voltage for each of the cycles.
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