Patent ID: 7196977
Filing Date: 2007-03-27
Classification: G11B

Abstract:
1. An optical disc device, comprising: movement means, which moves the focal spot of a light beam focused on an information carrier in a direction to traverse a track on the information carrier; detracking detection means, which generates a signal according to the positional relationship between the focal spot of the light beam and a track; tracking control means, which drives said movement means according to the signal output from said detracking detection means, and executes control such that the focal spot of the light beam scans on a track; and, track jumping means, which moves the focal spot of the light beam from a first track on the information carrier to an adjacent second track; and wherein said track jumping means comprises acceleration means which applies to said movement means an acceleration signal to accelerate the light beam, deceleration means which applies to said movement means a deceleration signal to decelerate the light beam which has been accelerated by said acceleration means, and amplitude measurement means which measures the amplitude of the signal output from said detracking detection means during operation of said acceleration means; said acceleration means modifies the length of time of the acceleration signal based on the amplitude measured by said amplitude measurement means; and, said deceleration means modifies the length of time of the deceleration signal based on the amplitude measured by said amplitude measurement means.