Abstract: A data recording and/or playing method for recording or playing data to or from an optical disc having a first recording area, where a frame sync signal and the data are recorded, and a second recording area, where a predetermined pattern is preformed, and having address data recorded therein, while rotating the optical disc by a rotation drive unit. The optical disc rotated by the rotation drive unit is scanned by a head unit, and when the head unit is scanning the first recording area, the rotation drive unit is controlled in a first rotation control mode. When the head unit is scanning the second recording area, the rotation drive unit is controlled in a second rotation control mode.

Abstract: The present invention is applied to a disk storage case adapted to store and carry, for example, a disk-shaped recording medium and to the recording medium, wherein the disk-shaped recording medium 21 is clamped and held from one surface and the other surface to be stored to prevent stress from being applied to the relevant recoding medium 21 when the recording medium 21 is stored and removed.

Abstract: An information recording medium, such as a disc, is provided from which data can be read in a stable fashion even when a label for the information recording medium is adhered thereon. A label is partially attached to the information recording member in which an information recording layer is formed on a substrate, on a label surface opposite the substrate. The so-called partial attachment involves attaching the label to the disc at only a few selected points and not to the entire disc surface.

Abstract: An information recording medium from which data can be read stably even when a label for the information recording medium is adhered thereon is provided. A label is partially attached to an information recording member in which an information recording layer is formed on a substrate.

Abstract: The present invention provides a data recording and/or playing method for recording or playing data to or from an optical disc (1 or 11) having a first recording area (3, 12b or 13b) where a frame sync signal and the data are recorded, and a second recording area (5 or 14) where a predetermined pattern is preformed, and having address data recorded therein, while rotating the optical disc (1 or 11) by means of a rotation drive unit (56 or 62). The optical disc rotated by the rotation drive unit (56 or 62) is scanned by a head unit (55 or 63). When the head unit (55 or 63) is scanning the first recording area (3, 12b or 13b), the rotation drive unit (56 or 62) is controlled in a first rotation control mode. When the head unit (55 or 63) is scanning the second recording area (5 or 14), the rotation drive unit (56 or 62) is controlled in a second rotation control mode.

Abstract: In an optical disc player or other apparatus in which a light beam is directed through an objective lens to be focused thereby at a record medium surface for optically reading information recorded in a track on such surface, the lens is mounted in one end of a tubular mounting member through which the path of the light beam extends longitudinally, a support member extends about the tubular mounting member, a leaf spring member, preferably of amorphous metal, extends between the other end of the tubular mounting member and the support member to permit longitudinal movements of the mounting member for correcting focusing errors, and further to permit swinging movements of the mounting member about a center located at such other end for correcting tracking and/or time base errors, and a body of substantially bulky elastic material, such as, polyurethane foam, is interposed between the support member and the tubular mounting member at a location along the latter intermediate its ends for further supporting the tu