| 摘要 |
An actuator includes a fixed including a substrate, electrodes disposed on a surface of the substrate, and an insulating layer disposed on the surface of the substrate to cover the electrodes. The actuator includes an electrically conductive, liquid member disposed on and contacting a surface of the insulating layer, a movable body contacting the liquid member, a retaining device configured to adhere the liquid member to the movable body, a device configured to apply potential to each of the electrodes, and a controller configured to control the device. The controller controls the device to change potential applied to each of the electrodes to vary liquid repellency of the insulating layer in response to potential difference applied between each of the electrodes and the liquid member to change at least one of a contact portion between the liquid member and the insulating layer and a contact area of the liquid member contacting on the surface of the insulating layer, to move the movable body relative to the fixed body.
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