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Recording apparatus and recording method

A recording device, a technology for recording marks, applied in the directions of optical recording/reproducing/erasing methods, data recording, optical recording heads, etc., can solve problems such as inability to obtain signal quality

Inactive Publication Date: 2005-08-10
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, even with a recording method for an optical recording medium having such improved and specified features, sufficient signal quality cannot be obtained, especially when recording is performed at a recording speed exceeding 10x

Method used

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  • Recording apparatus and recording method
  • Recording apparatus and recording method

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Embodiment Construction

[0021] Hereinafter, a description will be given of the embodiments of the present invention with reference to the drawings. This embodiment shows an example applied to an optical disc device as a recording device that performs information recording or rewriting on a phase-change type optical recording medium in accordance with a multi-speed method.

[0022] figure 1 It is a block diagram roughly showing the structure of the optical disc apparatus according to the present embodiment. The optical disc device 1 is equipped with a drive unit 3 and a recording and reproducing pickup 4. The drive unit 3 serves as a rotary drive for rotationally driving a phase-change optical recording medium 2 such as a CD-RW (Compact Disc Rewritable) by driving a spindle motor The device, the recording and reproducing pickup 4 contains a semiconductor laser (not shown in the figure) as a light emitting element, which emits laser light to be irradiated on the phase change optical recording medium 2 wh...

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Abstract

A recording quality is improved when performing information recording or rewriting on a phase-change type optical recording medium according to a multi-speed method. A recording apparatus (1) performs optical informational recording or rewriting on a phase-change type optical recording medium (2) according to the multi-speed method by a recording wave which has been subjected to a pulse-width modulation (PWM). Recording or rewriting of a 1-signal having a signal with nT after modulation is nT is performed by a pulse train recording wave having a pulse part fp, a multipulse part mp and a pulse part ep. On the assumption that a time with of the pulse part fp is x and a time width of the pulse part ep is z, a relationship between the time width x and the time width z satisfies 3z G11B 7 / 004 G11B 7 / 006 3 16 3 2003 / 3 / 17 1653525 2005 / 8 / 10 1320531 2007 / 6 / 6 2007 / 6 / 6 2007 / 6 / 6 Ricoh KK Japan Shimofuku Akira lu xiaozhang ma ying 11105 Japan 2002 / 3 / 15 071857 / 2002 2004 / 11 / 5 PCT / JP2003 / 003180 2003 / 3 / 17 WO2003 / 079336 2003 / 9 / 25 Japanese

Description

Technical field [0001] The present invention generally relates to a recording device and method, and more particularly to a recording device and method for recording information on a phase change optical recording medium. Background technique [0002] With the increase in the amount of information in recent years, large-capacity information recording media such as CD-ROM (Compact Disc Read Only Memory) and CD-R (Compact Disc Recordable) have become more and more popular. Since it is easy to obtain compatibility with such CD-ROMs and CD-Rs, phase change optical recording media such as CD-RW (Compact Disc Rewritable) have also been developed and widely used. The standard of two-speed recording (2.4-2.8m / s (m / s)) of phase-change recording media is defined in accordance with Part III (Version 1.0) of the Orange Book issued in October 1996. Optical disc recording that can record, reproduce, and rewrite information on phase-change recording media is also becoming more and more popular....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/0045G11B7/006G11B7/125
CPCG11B7/00454G11B7/126G11B7/0062
Inventor 下福光
Owner RICOH KK
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