Patent ID: 7099251
Filing Date: 2006-08-29
Classification: G11B

Abstract:
1. A method of controlling a writing laser power of a zone Constant Linear Velocity (CLV) type optical disk player, in which a linear velocity of writing data is accelerated, by stages, toward an outer edge of an optical disk, said method comprising: reading data about the optical disk from an ATIP of the optical disk; reading a stored recommended laser power of the disk based on the data read from the ATIP of the optical disk; writing test data with increasing and decreasing laser power with respect to the read recommended laser power; reading the written test data so as to calculate an inclination value “k” of an up-down symmetry “β” of a light intensity waveform with respect to a variation of the laser power; comparing the inclination value “k” with two stored values “x” and “y” (x<y) so as to judge that a temperature condition is a Low Temperature when k>y, the temperature condition is an Ordinary Temperature when x<k<y, or the temperature condition is a High Temperature when k<x; and controlling the laser power based on a correction value, which corresponds to the judged temperature condition and a changed linear velocity, when the linear velocity of writing data is changed.