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Disk equipment and disk method

A processing method, technology of equipment, applied in the direction of recording/reproducing by optical method, optical recording/reproducing/erasing method, information storage, etc., can solve the problem of inability to obtain reading laser output, focus servo or tracking servo instability , loss of control, etc.

Inactive Publication Date: 2007-02-07
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the sampling control fails, the control is out of control, and an appropriate reading laser output P cannot be obtained R
At the same time, there exists due to the reading laser output P R The problem of the control failure and not being able to get the proper RF signal, making the focus servo or tracking servo unstable

Method used

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  • Disk equipment and disk method
  • Disk equipment and disk method
  • Disk equipment and disk method

Examples

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Embodiment Construction

[0015] Hereinafter, an embodiment of an optical disk device according to the present invention will be described in detail with reference to the accompanying drawings.

[0016]

[0017] 1 is a block diagram showing an example of the structure of an optical disc device according to the present invention, and FIG. 2 is a block diagram showing the structure of an example of a pickup head of the optical disc device according to the present invention.

[0018] (structure)

[0019] In FIG. 1, the optical disk apparatus according to the present invention has a disk motor 12 for supporting an optical disk D and rotating the optical disk at the same predetermined speed, an optical pickup 14 for irradiating a light beam on the optical disk D, and detecting reflected light; an RF amplifier supplied with the detected signal for generating an RF signal and a servo signal; a signal processing circuit 18 supplied with the RF signal; and a laser output determining circuit 21. The laser out...

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Abstract

There is provided a disk device has a controller which determines a linear velocity VL of a disk, a laser output determination circuit which determines a read laser output PR of a photodiode according to this linear velocity and causing the photodiode to emit a laser light on the basis of a control signal C corresponding to the determined read laser output, and a sampling circuit which detects the emitted laser light by a front monitor and makes the control signal of the laser output determination circuit appropriate according to a sampling result obtained by performing the detection several times, wherein, even when a recording processing is performed at high velocity, sampling control of the read laser output can be securely performed.

Description

technical field [0001] The present invention relates to a disc device, and more particularly to a device for performing reading laser output P R A disc device and disc handling method for servo sampling control. Background technique [0002] In recent years, recording optical discs such as CD-R (Compact Disc Recording), DVD-R (Digital Versatile Disc Recording), DVD-RAM, etc. have been developed and popularized, and their recording / reproducing technology has been further improved accordingly. improve. [0003] The conventional technology of such an optical disk device is configured so that light energy is self-adjusted in a read control system and a write control system respectively, and when the difference between them exceeds a predetermined value, the self-adjustment is performed to obtain an appropriate Power output (eg, see Patent Reference 1). In this conventional technique, in recording optical discs such as CD-R, DVD-R, etc., after the write signal becomes low leve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B7/004G11B7/09G11B20/10G11B7/0045G11B7/125G11B7/1263G11B7/24
CPCG11B7/1263G11B2007/0013G11B7/24038
Inventor 市川登志雄
Owner KK TOSHIBA