An acoustic wave filter having excellent steepness is provided without adding any exterior components or any new manufacturing steps. The engine has compressor blades which are shrouded at. The controller switches between constant on-time control and constant power control based on an input voltage of the power converter. The line compensated generator receives a line position of each pixel to output a line compensated factor, and the LCO processor receives the line compensated factor and the overdriven data to generate compensated data for the pixel.