JP2000251383A5 - Disk drive device, recording layer identification method - Google Patents

Disk drive device, recording layer identification method Download PDF

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JP2000251383A5
JP2000251383A5 JP1999048105A JP4810599A JP2000251383A5 JP 2000251383 A5 JP2000251383 A5 JP 2000251383A5 JP 1999048105 A JP1999048105 A JP 1999048105A JP 4810599 A JP4810599 A JP 4810599A JP 2000251383 A5 JP2000251383 A5 JP 2000251383A5
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Prior art keywords
recording layer
error signal
drive device
reflected light
disk drive
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JP1999048105A
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JP2000251383A (en
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【特許請求の範囲】
【請求項1】 所定のトラックピッチを有する第1の記録層と、この第1の記録層よりも狭い所定のトラックピッチを有する第2の記録層とを有する、複層の光学ディスク状記録媒体に対応して再生又は記録を行うことのできるディスクドライブ装置であり、
上記第1の記録層に対応する解像度のレーザ光を光学ディスク状記録媒体のディスク面に照射して反射光情報を得る第1の反射光検出手段と、上記第2の記録層に対応する上記第1の反射光検出手段よりも高い解像度のレーザ光をディスク面に照射して反射光情報を得る第2の反射光検出手段とを備えた光学ピックアップ手段と、
上記光学ピックアップ手段にて得られた反射光情報に基づいて、ディスク面に対するレーザ光のフォーカス状態を示すフォーカスエラー信号を生成するフォーカスエラー信号生成手段と、
上記光学ピックアップ手段にて得られた反射光情報に基づいて、ディスク面に対するレーザ光のトラッキング誤差を示すトラッキングエラー信号を生成するトラッキングエラー信号生成手段と、
上記第1の反射光検出手段によりレーザ光をディスク面に照射させながら、このレーザ光の出力端である対物レンズと上記ディスク面との距離が変化するように制御を行う第1の移動制御手段と、
上記第1の移動制御手段により上記対物レンズと上記ディスク面との距離が変化している状態において、合焦位置にほぼ近い状態に対応する上記フォーカスエラー信号が検出されるか否かを検出するフォーカスエラー信号検出手段と、
上記フォーカスエラー信号検出手段により合焦位置にほぼ近い状態に対応する上記フォーカスエラー信号が検出されたときには、ディスク半径方向に沿った上記対物レンズとの相対位置が変位するように制御を行う第2の移動制御手段と、
上記第2の移動制御手段によりディスク半径方向に沿った上記対物レンズとの相対位置が変位している状態において、レーザ光がトラックを横断していることを示す上記トラッキングエラー信号が検出されるか否かを検出するトラッキングエラー信号検出手段と、
上記第1の移動制御手段による上記対物レンズの移動が開始されて終了されるまでの期間において得られた、上記フォーカスエラー信号検出手段と上記トラッキングエラー信号検出手段との検出結果に基づいて、装填された光学ディスク状記録媒体における各層の形成位置ごとに上記第1の記録層と第2の記録層の何れであるのかを判別する記録層判別手段と、
を備えていることを特徴とするディスクドライブ装置。
【請求項2】 上記第1の移動制御手段による上記対物レンズの移動が開始されて終了されるまでの期間において、上記光学ディスク状記録媒体を回転駆動するディスク回転制御手段、
が備えられることを特徴とする請求項1に記載のディスクドライブ装置。
【請求項3】 上記記録層判別手段による判別結果が得られた後において、上記第1の反射光検出手段を用いて、上記第1の記録層に記録されている管理情報を読み出す第1の管理情報読み出し動作と、上記第2の反射光検出手段を用いて、上記第2の記録層に記録されている第2の管理情報を読み出す第2の管理情報読み出し動作とがそれぞれ実行されるように制御を行う、管理情報読み出し制御手段が備えられることを特徴とする請求項1に記載のディスクドライブ装置。
【請求項4】 所定のトラックピッチを有する第1の記録層と、この第1の記録層よりも狭い所定のトラックピッチを有する第2の記録層とを有する、複層の光学ディスク状記録媒体に対応して再生又は記録を行うことのできるディスクドライブ装置において、上記第1の記録層と上記第2の記録層について判別する記録層判別方法であり、
上記第1の記録層に対応する解像度のレーザ光を光学ディスク状記録媒体のディスク面に照射して反射光情報を得る第1の反射光検出手段と、上記第2の記録層に対応する上記第1の反射光検出手段よりも高い解像度のレーザ光をディスク面に照射して反射光情報を得る第2の反射光検出手段とを備えた上記ディスクドライブ装置の光学ピックアップ手段にて得られた反射光情報に基づいて、ディスク面に対するレーザ光のフォーカス状態を示すフォーカスエラー信号を生成するフォーカスエラー信号生成手順と、
上記光学ピックアップ手段にて得られた反射光情報に基づいて、ディスク面に対するレーザ光のトラッキング誤差を示すトラッキングエラー信号を生成するトラッキングエラー信号生成手順と、
上記第1の反射光検出手段によりレーザ光をディスク面に照射させながら、このレーザ光の出力端である対物レンズと上記ディスク面との距離が変化するように制御を行う第1の移動制御手順と、
上記第1の移動制御手順により上記対物レンズと上記ディスク面との距離が変化している状態において、合焦位置にほぼ近い状態に対応する上記フォーカスエラー信号が検出されるか否かを検出するフォーカスエラー信号検出手順と、
上記フォーカスエラー信号検出手順により合焦位置にほぼ近い状態に対応する上記フォーカスエラー信号が検出されたときには、ディスク半径方向に沿った上記対物レンズとの相対位置が変位するように制御を行う第2の移動制御手順と、
上記第2の移動制御手順によりディスク半径方向に沿った上記対物レンズとの相対位置が変位している状態において、レーザ光がトラックを横断していることを示す上記トラッキングエラー信号が検出されるか否かを検出するトラッキングエラー信号検出手順と、
上記第1の移動制御手順による上記対物レンズの移動が開始されて終了されるまでの期間において得られた、上記フォーカスエラー信号検出手順と上記トラッキングエラー信号検出手順との検出結果に基づいて、装填された光学ディスク状記録媒体における各層の形成位置ごとに上記第1の記録層と第2の記録層の何れであるのかを判別する記録層判別手順と、
を実行することを特徴とする記録層判別方法。
[Claims]
1. A multi-layer optical disc-shaped recording medium having a first recording layer having a predetermined track pitch and a second recording layer having a predetermined track pitch narrower than the first recording layer. It is a disk drive device that can play or record in response to
The first reflected light detecting means for obtaining reflected light information by irradiating the disk surface of the optical disk-shaped recording medium with a laser beam having a resolution corresponding to the first recording layer, and the above-mentioned second recording layer corresponding to the second recording layer. An optical pickup means including a second reflected light detecting means for irradiating a disk surface with a laser beam having a resolution higher than that of the first reflected light detecting means to obtain reflected light information, and an optical picking means.
A focus error signal generation means that generates a focus error signal indicating a focus state of a laser beam with respect to a disk surface based on the reflected light information obtained by the optical pickup means.
A tracking error signal generation means that generates a tracking error signal indicating a tracking error of a laser beam with respect to a disk surface based on the reflected light information obtained by the optical pickup means.
The first movement control means that controls the distance between the objective lens, which is the output end of the laser beam, and the disk surface while irradiating the disk surface with the laser light by the first reflected light detecting means. When,
It is detected whether or not the focus error signal corresponding to a state substantially close to the in-focus position is detected in a state where the distance between the objective lens and the disk surface is changed by the first movement control means. Focus error signal detection means and
When the focus error signal corresponding to a state substantially close to the in-focus position is detected by the focus error signal detecting means, a second control is performed so that the position relative to the objective lens along the radial direction of the disk is displaced. Movement control means and
Whether the tracking error signal indicating that the laser beam is crossing the track is detected in a state where the position relative to the objective lens along the radial direction of the disk is displaced by the second movement control means. Tracking error signal detection means to detect whether or not,
The loading is based on the detection results of the focus error signal detecting means and the tracking error signal detecting means obtained in the period from the start to the end of the movement of the objective lens by the first movement control means. A recording layer discriminating means for discriminating which of the first recording layer and the second recording layer is formed for each layer formation position in the optical disc-shaped recording medium.
A disk drive device characterized by being equipped with.
2. A disc rotation control means for rotationally driving the optical disc-shaped recording medium during a period from the start to the end of the movement of the objective lens by the first movement control means.
The disk drive device according to claim 1, wherein the disk drive device is provided.
3. After obtaining the discrimination result by the recording layer discriminating means, the first reflected light detecting means is used to read out the management information recorded in the first recording layer. The management information reading operation and the second management information reading operation for reading the second management information recorded in the second recording layer by using the second reflected light detecting means are executed, respectively. The disk drive device according to claim 1, further comprising a management information reading control means for controlling the disk drive device.
4. A multi-layer optical disc-shaped recording medium having a first recording layer having a predetermined track pitch and a second recording layer having a predetermined track pitch narrower than the first recording layer. This is a recording layer discrimination method for discriminating between the first recording layer and the second recording layer in a disk drive device capable of performing playback or recording in response to the above.
The first reflected light detecting means for obtaining reflected light information by irradiating the disk surface of the optical disk-shaped recording medium with a laser beam having a resolution corresponding to the first recording layer, and the above-mentioned second recording layer corresponding to the second recording layer. It was obtained by the optical pickup means of the disk drive device provided with the second reflected light detecting means for irradiating the disk surface with a laser beam having a resolution higher than that of the first reflected light detecting means to obtain the reflected light information. A focus error signal generation procedure that generates a focus error signal indicating the focus state of the laser beam with respect to the disk surface based on the reflected light information, and a focus error signal generation procedure.
A tracking error signal generation procedure for generating a tracking error signal indicating a tracking error of laser light with respect to a disk surface based on the reflected light information obtained by the optical pickup means, and a procedure for generating a tracking error signal.
The first movement control procedure for controlling the distance between the objective lens, which is the output end of the laser beam, and the disk surface while irradiating the disk surface with the laser light by the first reflected light detecting means. When,
It is detected whether or not the focus error signal corresponding to the state substantially close to the in-focus position is detected in the state where the distance between the objective lens and the disk surface is changed by the first movement control procedure. Focus error signal detection procedure and
When the focus error signal corresponding to a state substantially close to the in-focus position is detected by the focus error signal detection procedure, control is performed so that the position relative to the objective lens along the radial direction of the disk is displaced. Movement control procedure and
Whether the tracking error signal indicating that the laser beam is crossing the track is detected in a state where the relative position with the objective lens along the radial direction of the disk is displaced by the second movement control procedure. Tracking error signal detection procedure to detect whether or not, and
Loading based on the detection results of the focus error signal detection procedure and the tracking error signal detection procedure obtained in the period from the start to the end of the movement of the objective lens by the first movement control procedure. A recording layer determination procedure for determining whether the first recording layer or the second recording layer is formed for each layer formation position on the optical disc-shaped recording medium, and a recording layer determination procedure.
A recording layer discrimination method characterized by executing.

【0001】
【発明の属する技術分野】
本発明は、光学ディスク状記録媒体に対応して再生又は記録を行うことのできるディスクドライブ装置と、このようなディスクドライブ装置における光学ディスク状記録媒体の記録層についての判別方法に関するものである。
[0001]
[Technical field to which the invention belongs]
The present invention relates to a disc drive device capable of performing reproduction or recording corresponding to an optical disc-shaped recording medium, and a method for discriminating between a recording layer of the optical disc-shaped recording medium in such a disc drive device.

JP11048105A 1999-02-25 1999-02-25 Disk drive device Pending JP2000251383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11048105A JP2000251383A (en) 1999-02-25 1999-02-25 Disk drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11048105A JP2000251383A (en) 1999-02-25 1999-02-25 Disk drive device

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JP2000251383A JP2000251383A (en) 2000-09-14
JP2000251383A5 true JP2000251383A5 (en) 2006-04-13

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3778290B2 (en) 2003-07-29 2006-05-24 船井電機株式会社 Optical disk playback device
KR100610673B1 (en) 2005-06-17 2006-08-09 삼성전자주식회사 A method to distinguish the kind of optical disk
JP4484838B2 (en) * 2005-07-11 2010-06-16 三洋電機株式会社 Hybrid type optical disc
WO2008072314A1 (en) * 2006-12-13 2008-06-19 Pioneer Corporation Optical disc reproduction device, optical disc reproduction method, optical disc reproduction program, and recording medium containing optical disc reproduction program

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