Method for controlling slope of optical disc recording reproducing apparatus and apparatus thereof

Abstract

An offset adjustment signal is recorded in a test recording area provided on the inner side of a disc while modifying the level of a driving signal for offset detection that is supplied to a tilt adjustment coil. Thereafter, an operation to play back the offset adjustment signal is performed, and the peak level of an RF signal that is played back is detected. When a signal is recorded for which the detected peak level reaches a maximum, the level of the driving signal supplied to the tilt adjustment coil is set as an offset value. Tilt control is then performed by adding the offset value to a tilt signal for performing tilt control.

Description

technical field [0001] The present invention relates to an optical disc recording and reproducing device, which is configured to record a signal on a disc using laser light irradiated by an optical pickup, and to reproduce the signal recorded on the disc by using the laser light. Background technique [0002] Disc players that read signals recorded on discs with optical pickups are gaining popularity, and optical disc recording and reproducing devices that can record signals on discs with laser light irradiated from optical pickups in addition to their reproduction functions are also commercialized. [0003] In the optical disc recording and reproducing apparatus, it is necessary to accurately irradiate the laser beam irradiated by the optical pickup on the signal track on the disc surface, and perform the focus control operation and the tracking control operation. The focus control action is accomplished by applying a driving current to the focusing coil, while the tracking...

AI Technical Summary

Problems solved by technology

According to this technology, although accurate tilt control can be performed, the tilt sensor is expensive, and there is a problem that the price of an optical disc recording and reproducing device is high.

[0006] Moreover, although the inclination adjustment coil incorporated in the optical pickup is fixed on the supporting member supporting the objective lens, not only the installation position deviates, but also the surrounding temperature changes, the posture of the optical disc recording and reproducing device and the elapsed time There are also changes, so the tilt angle is not constant when the tilt coil is not supplied with drive voltage

Therefore, when the tilt adjustment operation is performed while maintaining this state, there is a problem that the correct tilt adjustment operation cannot be performed.

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