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Optical disk device and its control method

A technology for optical discs and equipment, which is applied in the direction of recording/reproducing by optical methods, optical recording/reproducing/erasing methods, instruments, etc., which can solve the frequent occurrence of incorrect judgments, the inability to make judgments, and the inability to obtain good judgment accuracy, etc. question

Inactive Publication Date: 2006-11-01
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the technique of judging an optical disc using the reflectance, there arises a problem that good judgment accuracy cannot be obtained due to frequent occurrence of incorrect judgment due to a solid difference of the optical disc.
In addition, in the case where the disc judgment due to the depth of focus has been carried out, such a trouble arises that the judgment cannot be made because the distance from the surface to the recording layer is equal in HD DVD and DVD

Method used

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  • Optical disk device and its control method
  • Optical disk device and its control method
  • Optical disk device and its control method

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Embodiment Construction

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. figure 1 By taking an HD DVD-ROM that performs playback using a laser beam based on blue light and a DVD-ROM that performs playback using a laser beam based on red light as an example of the optical disc 11, it is shown that HD DVD-ROM and DVD-ROM Differences in recording area between ROMs.

[0024] That is, in the HD DVD-ROM, from its inner peripheral side to its outer peripheral side, are formed: a BCA area; a system lead-in area where identification information is written; a connection area; a data lead-in area where data information is written; a data area in which data is written; and a data lead-out area indicating the end of the data.

[0025] In contrast, in DVD-ROM, from its inner peripheral side to its outer peripheral side, formed: a lead-in area where identification information is written; a data area where data is written; and a lead-out area indicating the ...

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Abstract

An optical pickup (13) capable of selectively emitting blue light based and red light based laser beams is moved to a radial direction of an optical disk (11) while emitting either of the laser beams, and it is detected whether or not a track pitch of the optical disk (11) has changed based on a signal (TE) obtained from the optical pickup (13). In the case where a change in the track pitch of the optical disk (11) has been detected, the blue light based laser beam is emitted from the optical pickup (13). In the case where a change in the track pitch of the optical disk (11) is not detected, the red light based laser beam is emitted from the optical pickup (13).

Description

technical field [0001] The present invention relates to an optical disc device and a method of controlling the optical disc device for recording or reproducing an optical disc. More particularly, the present invention relates to an optical disc device that automatically judges the type of an optical disc loaded therein. Background technique [0002] As we all know, optical discs are roughly classified into high-definition digital versatile discs (HD DVD), DVDs, and compact discs (CDs) depending on their capacity. Among various optical discs, various types of read-only optical discs, rewritable optical discs, and write-once optical discs are prepared according to their uses. Various optical discs differ from each other in physical structural characteristics such as the laser beam (wavelength) used, disc rotation frequency, and playback signal processing system. [0003] On the other hand, there is a need for an optical disc device that allows playback of various optical dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/00
CPCG11B7/24079G11B19/128G11B2007/0006G11B19/12G11B7/004
Inventor 森崇之
Owner KK TOSHIBA