CD recording/playing device and method for detecting CD flaw

Abstract

This invention relates to disc record or play device and its disc crack testing method, which uses disc driver to drive and record the disc and needed information. The device comprises the following parts: crack testing device to test whether there is crack and output the crack generation signals; control device to receive the crack generation signals to judge the crack and output control signals; alarming device to generate alarming signals according to control signals to acknowledge the user disc to generate crack.

Description

(1) Technical field [0001] The present invention relates to an optical disc recording / playing device, in particular to an optical disc recording / playing device capable of detecting cracks in the optical disc in advance and a method for detecting cracks in the optical disc. (2) Background technology [0002] An optical disc is a product that uses optical properties to record / play back information, usually in the shape of a small disc. In order to be able to use such an optical disc, an optical disc recording / playback device is required. [0003] As a device for recording information or reading information on an optical disc, an optical disc recording / playing device has gradually become a must-have device for modern people who pursue multiple enjoyments. When the optical disc recording / playing device records and plays information, it needs to have an optical disc drive, which is used to drive the optical disc with recorded information and the optical disc that needs to record...

AI Technical Summary

Problems solved by technology

The centrifugal force is not a big problem at low multiple speeds, but the higher the multiple speed is, the greater the centrifugal force will be, and in some cases cracks will appear on the disc.

If the disc is used for a long time, the cracks produced will become larger and larger, and eventually the disc may be destroyed at a certain moment due to its inability to resist the centrifugal force

[0011] The damage of the disc due to the above-mentioned cracks is a phenomenon that often occurs when the speed is above 40 times, and it is more likely to occur if the disc is defective.

[0012] The disc damage that often occurs during the rotation of the disc drive is very powerful under the condition of high-speed rotation. It will not only damage the disc drive, but also damage the disc fragments that fly out and even injure the user.

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