Patent ID: 6532034
Filing Date: 2003-03-11
Classification: G11B

Abstract:
A method of writing a visible figure in an optical disk, comprising the steps of:providing an application program; providing an optical disk which has a recording region or a recording film, wherein the recording region or the recording film is made of a phase-changing material, wherein a first visible figure is written in the recording region or the recording film, wherein the application program stores data to write a second visible figure in the optical disk; reading data for writing the second visible figure while the application program is proceeding; developing figure data which has been read into coordinates for writing; converting the coordinates for writing into coordinates on the disk; generating a laser driving pattern for each track of the recording region or the recording film to write the second visible figure based on the figure data developed on the coordinates on the disk; and driving a laser based on the laser driving pattern, thereby irradiating the optical disk with beam pulses to write the second visible figure in the recording region or the recording film to change the first visible figure into the second visible figure.