ROTATION CONTROL DEVICE, ROTATION CONTROL METHOD AND ROTATION CONTROL PROGRAM

摘要

Provided is a rotation control device for more accurately controlling rotation of an optical disk at the time of recording information on a label surface and the like of the optical disk where recording tracks and like do not exist. The rotation control device (SR) for controlling rotation of the optical disk (DK) is provided with a pulse generating section (2) directly connected with a spindle motor (1); a speed/phase comparing section (5) for generating a speed error signal (Serd) and a first phase error signal (Ser1) which indicate rotation error based on each pulse in a pulse signal (Sfg) from the pulse generating section (2); a phase comparing section (8) for generating a second phase error signal (Ser2) which indicates a rotation error based on each pulse equivalent to timing wherein one rotation of the optical disk (DK) completes; and a driver (10) for controlling rotation of the optical disk (DK) based on the generated speed error signal (Serd), the first phase error signal (Ser1) and the second error signal (Ser2).