Optical disc device and recording method of the same

A technology of an optical disc device and a recording method, which is applied to optical recording/reproducing/erasing methods, optical recording heads, optical recording systems, etc., can solve the problems of increased consumption and inability to adjust the warpage and tilt of optical discs, and achieves low consumption. , the effect of recording good quality

Active Publication Date: 2011-04-13
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in an optical disc device having a tilt adjustment unit that corrects the deviation of the angle between the optical axis of the laser beam emitted from the objective lens and the surface of the recording medium from being perpendicular due to the warp of the disc, there is a problem that the warp of the disc cannot be accurately adjusted. Problems with Tilt Adjustment
[0008] In addition, in the case where the tilt sensor is used to perform tilt adjustment at a plurality of radial positions of the optical disc in advance in order to calculate an approximate expression for the estimated tilt correction value, there is a problem that the consumption increases, and there is a problem that an additional tilt sensor circuit is required.

Method used

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  • Optical disc device and recording method of the same
  • Optical disc device and recording method of the same
  • Optical disc device and recording method of the same

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Experimental program
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Embodiment approach 1

[0055] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0056] The optical disc device of the present invention detects the signal quality of the recording signal, and when it is judged that the recording quality has deteriorated, performs tilt adjustment, and detects the signal quality of the recording signal by the signal quality detection unit, and when it is detected that the recording signal quality is still at In the case of deterioration, change the recording parameters.

[0057] figure 1 It is a block diagram showing the configuration of the optical disc device 30 and the host controller 40 of the present invention together. The illustrated optical disc device 30 rotates the optical disc 1 by a spindle motor (not shown), and performs recording and reproduction by the optical head 10 . Data to be recorded is supplied from the host controller 40 , and reproduced data is supplied to the host controller 40 . Next, it...

Embodiment approach 2

[0112] Figure 9 It is a flowchart showing the processing procedure in the recording method according to Embodiment 2 of the present invention. The recording method of Embodiment 2 also uses figure 1 The disc device shown is carried out.

[0113] Figure 9 processing order and Figure 8 The processing sequence of is substantially the same, but it is different in that steps S11 and S12 are performed after step S6.

[0114] In step S11, at the time of tilt adjustment in step S6, it is judged whether tilt correction has occurred (whether the tilt has been changed). The address information (position information) of the position above) and the information of the inclination angle are stored in, for example, the parameter memory 23b.

[0115] As the address information, radial position information may also be used. The stored information is held as a graph and becomes the tilt characteristic information of the optical disc 1 .

[0116] The tilt characteristic information is ...

Embodiment approach 3

[0122] Figure 10 It is a flowchart showing the processing procedure in the recording method according to Embodiment 3 of the present invention. The recording method of Embodiment 3 also uses figure 1 The disc device shown is carried out.

[0123] Figure 10 processing order and Figure 8 The processing procedure is almost the same, but it is different in that steps S21, S22, S23A, and S23B are executed instead of steps S5 to S7, and step S11B is added. and Figure 8 The same reference numerals denote steps that perform the same processing. The processing of step S11B is the same as Figure 9 The processing content of step S11 is the same. The processing in step 23A is the same as the processing in step 23B.

[0124] After the recording start command is issued from the host controller 40, tilt adjustment is performed at the recording start position (S1). This tilt adjustment is performed by the tilt control unit 14 under the control of the CPU 22 .

[0125] In the c...

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Abstract

In the case where data in a recorded area is reproduced when a recording operation is interrupted and deterioration of a recording signal is detected (S4, S5) by a signal quality detecting means (16), tilt adjustment is made (S6) in the recorded area, the signal quality of the recording signal is detected (S6) after the tilt adjustment is made, and when the recording signal is still in the deteriorated state, a recording parameter is adjusted (S7). Acquisition of tilt adjustment values at a plurality of radius positions for tilt correction in advance is not required, and an overhead of the device is reduced in sizes and recording qualities are improved.

Description

technical field [0001] The present invention relates to an optical disc device and its method for recording and reproducing an optical disc, in particular to a tilt adjustment method and device during recording. Background technique [0002] In the optical disc device, it is configured to perform focus control, tracking control, and tilt control so that information can be recorded or reproduced accurately. Among them, the focus control is to focus on the information plane of the optical disc, and perform tracking control so as not to deviate from it. The information track formed on the information recording surface of the optical disc is tilt-controlled so that the optical axis of the laser light emitted from the objective lens is perpendicular to the recording medium surface. [0003] Various optical discs have been developed, including DVD (Digital Versatile Disc: Digital Versatile Disc) and BD (Blu-ray Disc: Blu-ray Disc) for TV (television) broadcast video playback and P...

Claims

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Application Information

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IPC IPC(8): G11B7/095G11B7/0045G11B7/125
CPCG11B7/0956
Inventor 清濑泰广岸上智
Owner MITSUBISHI ELECTRIC CORP
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