Patent ID: 7161880
Filing Date: 2007-01-09
Classification: G11B

Abstract:
1. A disk apparatus for moving a lens converging a laser beam onto a track formed on a recording surface of a disk recording medium in a radius direction of said recording surface for a seek operation, comprising: a generating means for generating a tracking error signal based on the laser beam reflected from said recording surface; a peak level detection means for detecting a peak level of said tracking error signal; a level change amount detection means for detecting a level change amount of said tracking error signal in a unit time; and a controlling means for controlling a moving speed of said lens based on said level change amount and said peak level, wherein said controlling means includes a comparing means for comparing said level change amount with a threshold value, a changing means for changing said moving speed depending upon a comparison result of said comparing means, and a deciding means for deciding said threshold value based on said peak level.