Patent ID: 7558169

Claim:
An optical disc apparatus that illuminates a surface of an optical disc with a laser to perform information writing and to perform a tracking servo operation during the recording of data, the optical disc having a recording layer which complies with a given optical disc specification and which is capable of recording data upon illumination with the laser, and a color forming layer which is capable of forming a multi-color image having a plurality of colors upon illumination with the laser, the color forming layer including color formers, which form particular colors depending upon a laser energy or wavelength applied to the color formers, the optical disc apparatus comprising: an optical pickup for applying the laser to a disc placed in the apparatus; and an illumination control unit that, in response to an instruction for performing image formation on the disc, controls the optical pickup to illuminate the color forming layer of the disc with the laser to form the multi-color image based on color image data, wherein the illumination control unit controls the laser to operate at the laser energy or the wavelength to form the particular colors, wherein the tracking servo operation is disabled by adopting a fixed value as a target value for tracking control while the optical pickup forms the multi-color image, and wherein the fixed value is a constant offset voltage that is set for a tracking actuator.