the invention concerns a light deflection device , and a control method for the light deflection device , which are rich in expandability of drive control . the light deflection device includes a polygon mirror to reflect the light beam ; a rotor , having a magnet , to rotate the polygon mirror attached to the rotor ; a stator on which a plurality of drive coils are fixed so as to generate a rotational force ; and a plurality of connecting ports through which the plurality of drive coils are electronically coupled to a plurality of drive circuits , each of which drives the drive coils while controlling the rotational force to be generated between the magnet and the drive coils . one of the drive circuits controls the rotational force during a start - up operation and a steady - rotating operation of the rotor , while another one controls the rotational force during a decelerating operation of the rotor .