A driving method of an optical actuator is applied to a projection system. The base includes a wick that absorbs small amounts of a liquid form of the base substance. A controller is coupled to the support structure for movement between a deployed position and a stored position. Also provided is a method for providing an image on a hydrophobic surface and the image so provided. The magnetic means are capable of being rotated either towards the inner house or away from the inner house such that the elastic modulus of the magnetorheological elastomer is either increased or decreased.