Patent ID: 6754154
Filing Date: 2004-06-22
Classification: G11B

Abstract:
An apparatus for use in driving an optical pick-up, said apparatus comprising a tilt driving section for altering an incidence angle of a light spot irradiated from said optical pickup onto a rotating surface of an optical disk in order to record information or reproduce information by irradiating the light spot on said optical disk by said optical pickup,wherein said tilt driving section is usable with a stepping motor as a driving means for altering the angle of said optical pickup with respect to the rotating surface of said optical disk, and has waveform shaping means for smoothing a waveform of a driving current for driving said stepping motor, and wherein a tilt middle point is determined by rotating the stepping motor in a first direction a first predetermined number of steps to insure that the stepping motor is at a first position which corresponds to a stop position, setting the first position as a reference position, and rotating the stepping motor in a second direction which is opposite to the first direction a second predetermined number of steps from said reference position to said tilt middle point.