Patent ID: 7424330

Claim:
An apparatus for controlling a first and a second deformable actuator, comprising: a driver being operative in operation cycles comprising a programming period, an event period and a non-event period, the driver being configured to, in each operation cycle, during the programming period, cause the first and second deformable actuator to assume an idle deformation state, during the event period, cause the first deformable actuator to assume a first deformation state and cause the second deformable actuator to assume a second deformation state, and, before or after the event period during the non-event period, cause the deformable actuators to assume deformations states to counteract an imprinting caused during the event period thereby approximating the loads applied to the deformable actuators during the operation cycle to each other; wherein the first deformable actuator is controllable by the difference between a first address signal and a driving signal, the second deformable actuator is controllable by the difference between a second address signal and the driving signal, and wherein the driver comprises, an adjuster for, during the programming period, adjusting the first and the second address signal to a first and a second address value; and a driver for driving the driving signal to a first driving value during the event period thereby causing the first deformable actuator to assume the first deformation state and the second deformable actuator to assume the second deformation state and, during the non-event period, driving the driving signal to a second driving value which is adapted such that the deformable actuators assume deformations states to counteract an imprinting caused during the event period thereby approximating the loads applied to the deformable actuators to each other.