A piezoelectric element 13 has a common electrode 19 that receives electricity from a terminal 57. Pixels from a current frame are aligned with matching pixels from previous andor future frames according to the motion of the surrounding object of arbitrary shape. According to another aspect of the invention, the step of exposing the substrate to oxidizing conditions is conducted after provision of first and second insulating materials and subsequent anisotropic etch thereof to insulate the gate sidewalls. A method of designing a transmission line bend structure includes the step of providing a preliminary bend structure design having an electrically conductive strip with at least one inner edge extending along a circuitous path between first and second inner edge end points on the strip.