High-density disc and driver thereof

Abstract

The invention relates to a high-density disc and a driver thereof, making the outermost surface of the disc similar to high density DVD (HD-DVD) have the dissymmetrical structure supposing the disc thickness central plane as inference and the drive apparatus of the high density disc. The structure comprises: a detecting member for detecting the inserting state of the high density disc with the relative structure shape to the disc outermost surface which is set at a side section; a shifting member for shifting the detecting member; a switch be selectively on or off based on the shifting position of the detecting member; servo controller for controlling the corresponding servo operation based on the on / off state of the switch after deciding the inserting state of the high density disc. The invention selectively stops the focus servo operation of the servo controller when detecting the high density disc is incorrectly inserted or not inserted in the drive apparatus so as to prevent the collision between the lens of the optical pick-up and the high density disc.

Description

(1) Technical field [0001] The present invention relates to a high-density optical disc and its drive device, that is, in the optical disc drive device for reproducing or recording signals recorded on a high-density optical disc similar to a high-density DVD (HD-DVD: High Density Digital Versatile Disc), when A high-density optical disc and its driving device for preventing the conflict between the optical disc and the optical pick-up object lens when the high-density optical disc is wrongly inserted. (2) Background technology [0002] Existing CD disc (hereinafter referred to as CD or CD disc), as shown in Figure 1, its thickness is 1.2mm, diameter is 120mm, and is provided with the central hole of 15mm diameter, and by the turntable and the clamp in the disc drive device The device consists of a clamping area for clamping with a diameter size of 44mm. The data recording layer recorded on the above-mentioned CD in a pit pattern is arranged at a position facing the object l...

AI Technical Summary

Problems solved by technology

[0008] Next, the above-mentioned objective lens (OL) of the pickup 14 cannot perform normal data reading or recording by the focusing operation of moving up and down.

Therefore, inside the servo controller 15 that controls the above-mentioned focusing operation, the objective lens (OL) of the above-mentioned pickup 14 is vertically moved toward the recording layer direction of the HD-DVD 10 to the maximum operating distance (OD max ), as a result, the objective lens (OL) of the pickup and the HD-DVD10 collide with each other, the high-density disc or the objective lens of the pickup is broken, or a fatal error occurs to the servo operation

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