Optical disk, optical disk apparatus, and method for writing figures

摘要

A method of writing a visible figure in an optical disk, including the steps of providing an application program; providing an optical disk having a recording region/film made of a phase-changing material in which a first visible figure is written, the application program storing data to write a second visible figure in the optical disk; reading data for writing the second visible figure; developing figure data which has been read into writing coordinates; converting the writing coordinates into disk coordinates; generating a laser driving pattern for each track of the recording region/film to write the second visible figure based on the developed figure data on the disk coordinates; and driving the laser based on the laser driving pattern, thereby irradiating the optical disk to write the second visible figure in the recording region/film to change the first visible figure into the second visible figure.