| 摘要 |
PROBLEM TO BE SOLVED: To ideally drive all vibration actuator, even when one vibration actuator or a plurality of vibration actuators are selectively driven. SOLUTION: When a vibration actuator 50i to be driven is selected though a switch circuit 12, the frequency of an AC signal being applied to the vibration actuator 50I by a driving circuit 1 is swept from a high-frequency side to a low-frequency side. During the sweep, the current value of current for drive is detected by a detection circuit 18. Then, a control device 22 monitors a detection value being detected by the detection circuit 18, the sweep of a drive frequency is stopped at either point of time between the point of time, when a parameter value being related to the detection value becomes a specified value and the point of time when the frequency is swept by a specific frequency. After that, the vibration actuator 50i is driven by the AC signal of the driving frequency, at the point of time when the frequency sweep is stopped. |
