Patent ID: 7336292
Filing Date: 2008-02-26
Classification: B41J,G11B

Abstract:
1. A method for forming visible information on an optical medium that includes a data side and an opposing label side, comprising the acts of: receiving image data; relatively moving the optical medium and an optical pickup along a plane of the optical medium; generating, by the optical pickup, a laser beam; and irradiating a visible light characteristic changing layer, that is dedicated to label printing, on the label side of the optical medium with the laser beam at least at first and second output levels based at least in part on the image data, wherein the second output level forms the visible information, wherein when the optical medium is irradiated by the laser beam at the second output level, a visible light characteristic of the visible light characteristic layer of the optical medium changes, and when the optical medium is irradiated by the laser beam at the first output level, the visible light characteristic layer of the optical medium does not change, and wherein the optical medium reflects the irradiated laser beam at the first output level, wherein the reflection is used for a focus servo operation.