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Recording/reproducing device

A reproducing device and recording layer technology, applied in the directions of digital recording/reproduction, optical recording/reproduction/erasing method, optical method recording/reproduction, etc., capable of solving problems such as recording or reproduction of difficult-to-record film L1 layer marks

Inactive Publication Date: 2003-12-10
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the problem to be solved is that it is difficult to perform high-accuracy mark recording or reproduction on the recording film L1 layer.

Method used

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  • Recording/reproducing device
  • Recording/reproducing device
  • Recording/reproducing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] best practice

[0042] An optical disk drive of an embodiment of the present invention will be described below. However, before describing the optical drive, first refer to Figures 2 to 5 A dual-layer recording-reproducing optical disc 1 is described, in which the optical disc is loaded into an optical disc drive (FIG. 6) to record data thereon.

[0043] An optical disc (hereinafter simply referred to as an optical disc) 1 includes a substrate, a recording film L1 layer, a blank layer, a recording film L0 layer, and a cover layer. These layers are as follows: figure 1 shown stacked on top of each other in the above order.

[0044] figure 2 The recording layers (recording film L0 layer and recording film L1 layer) of the optical disc 1 are shown. A spiral groove (guide groove) wobbled at a fixed frequency is formed on the recording layer of the optical disc. Therefore, a track formed by grooves and another track formed by lands are alternately formed on a circumfe...

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Abstract

A recording / reproducing device suitably used in recording or reproducing data to / from an optical disk having two recording layers on one surface thereof, and a program. An optical disk having two layers on one surface one unformatted recording film (L0) layer and one formatted recording film (L1) layer, wherein the recording film (L0) layer is formatted by a mark in step S1, the formation of a mark corresponding to record data is started with the recording film (L0) layer first in step S2, and, after the recording film (L0) layer is used up, a mark corresponding to record data is formed on the recording film (L1) layer in step S3. This device can be applied to e.g. DVD players.

Description

technical field [0001] The present invention relates to a recording and / or reproducing apparatus, and more particularly to a recording and / or reproducing apparatus suitable for data recording and / or reproducing of an optical disc having dual recording layers on one side thereof. Background technique [0002] Double-layer recording-reproducing optical discs, in which a double-layer recording film is provided on one side of the optical disc to double the recording capacity of each side, are continuing to be developed. [0003] In a dual-layer recording-reproducing disc, such as figure 1 As shown in the sectional view of , the recording film L1 layer for recording data, the blank layer, another recording film L0 layer for recording data, the cover layer for protecting the recording film L0 layer, and the layer under the recording film L0 layer Other layers are formed on a substrate such as polycarbonate in such a manner that they overlap each other. It should be noted that an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/00G11B7/0045G11B7/007G11B20/10G11B20/12G11B27/19G11B27/24G11B27/30
CPCG11B27/24G11B20/1217G11B2007/0013G11B2020/1267G11B2220/2562G11B7/00745G11B20/10G11B2220/237G11B2020/1287G11B2220/2537G11B2020/1227G11B7/0045G11B2020/1239G11B7/00718G11B27/3027G11B27/19
Inventor 小林昭荣
Owner SONY CORP