JP2000298846A5 - - Google Patents
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- JP2000298846A5 JP2000298846A5 JP1999103303A JP10330399A JP2000298846A5 JP 2000298846 A5 JP2000298846 A5 JP 2000298846A5 JP 1999103303 A JP1999103303 A JP 1999103303A JP 10330399 A JP10330399 A JP 10330399A JP 2000298846 A5 JP2000298846 A5 JP 2000298846A5
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- level
- acceleration
- focus
- signal
- error signal
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- 230000003287 optical effect Effects 0.000 description 12
- 230000001133 acceleration Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Description
【特許請求の範囲】
【請求項１】 光ディスクの複数の記録面に情報を記録または再生する光ディスク駆動装置において、
上記光ディスクに情報を記録または再生するためのレーザ光を照射する光ピックアップ手段と、
上記光ピックアップ手段により照射されるレーザ光のフォーカス状態をフォーカスエラー信号に基づいて制御するフォーカス制御手段と、
上記フォーカスエラー信号のレベルを検出するレベル検出手段と、
上記フォーカスエラー信号に対応して上記複数の記録面の１つから他の記録面にフォーカスジャンプさせるための加減速信号を発生させる加減速信号発生手段とを具備し、
上記加減速信号発生手段から出力される加速及び減速信号を上記レベル検出手段のフォーカスエラー信号の閾値レベルに対応して切換え制御して成ることを特徴とする光ディスク駆動装置。
【請求項２】 光ピックアップからのレーザ光の焦点位置を複数の記録面の１つから他の記録面に移動させる光ディスクのフォーカスジャンプ方法に於いて、
上記光ピックアップのフォーカスサーボ系のフォーカスエラー信号のレベルを検出するステップと、
上記レベル検出信号に基づいてフォーカスジャンプを行なうための加減速信号を出力するステップとを有し、
上記加減速信号の出力タイミングは加速信号の出力開始後にフォーカスエラー信号のレベルが所定の第１の閾値を越えた時に加速信号を停止させるステップと、
上記フォーカスエラー信号のレベルが所定の第２の閾値になったとき減速信号の出力を開始するステップと、
上記フォーカスエラー信号のレベルが所定の第３の閾値を越えたことを検出し、それに続いて、該フォーカスエラー信号のレベルが所定の第４の閾値以下になった時に減速信号の出力を停止させる様に成したことを特徴とする光ディスクのフォーカスジャンプ方法。
【請求項３】 上記レベル検出手段は、上記加減速信号発生手段からの加減速信号出力中に上記フォーカスエラー信号のレベルを検出することを特徴とする請求項１に記載の光ディスク駆動装置。
【請求項４】 上記レベル検出手段は、所定の時刻ごとに設定された閾値レベルを超えているかどうかを検出することを特徴とする請求項１に記載の光ディスク駆動装置。
[Claims]
1. In an optical disk driving device that records or reproduces information on a plurality of recording surfaces of an optical disk.
An optical pickup means that irradiates a laser beam for recording or reproducing information on the optical disc, and
A focus control means that controls the focus state of the laser beam emitted by the optical pickup means based on a focus error signal, and a focus control means.
A level detecting means for detecting the level of the focus error signal and
It is provided with an acceleration / deceleration signal generating means for generating an acceleration / deceleration signal for making a focus jump from one of the plurality of recording surfaces to the other recording surface in response to the focus error signal.
An optical disk drive device characterized in that the acceleration / deceleration signals output from the acceleration / deceleration signal generating means are switched and controlled in accordance with the threshold level of the focus error signal of the level detecting means.
2. The focus jump method for an optical disc, in which the focal position of a laser beam from an optical pickup is moved from one of a plurality of recording surfaces to another recording surface.
The step of detecting the focus error signal level of the focus servo system of the optical pickup and
It has a step of outputting an acceleration / deceleration signal for performing a focus jump based on the above level detection signal.
The output timing of the acceleration / deceleration signal includes a step of stopping the acceleration signal when the level of the focus error signal exceeds a predetermined first threshold value after the start of output of the acceleration signal.
The step of starting the output of the deceleration signal when the level of the focus error signal reaches a predetermined second threshold value, and
It is detected that the level of the focus error signal exceeds a predetermined third threshold value, and subsequently, when the level of the focus error signal becomes equal to or lower than a predetermined fourth threshold value, the output of the deceleration signal is stopped. A focus jump method for optical discs, which is characterized by the above.
3. The optical disk driving device according to claim 1, wherein the level detecting means detects the level of the focus error signal during the output of the acceleration / deceleration signal from the acceleration / deceleration signal generating means.
4. The optical disk driving device according to claim 1, wherein the level detecting means detects whether or not the threshold level set at predetermined time intervals is exceeded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11103303A JP2000298846A (en) | 1999-04-09 | 1999-04-09 | Optical disk drive and optical disk focus jump method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11103303A JP2000298846A (en) | 1999-04-09 | 1999-04-09 | Optical disk drive and optical disk focus jump method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000298846A JP2000298846A (en) | 2000-10-24 |
| JP2000298846A5 true JP2000298846A5 (en) | 2006-04-27 |
Family
ID=14350479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11103303A Pending JP2000298846A (en) | 1999-04-09 | 1999-04-09 | Optical disk drive and optical disk focus jump method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000298846A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353431C (en) * | 2001-07-26 | 2007-12-05 | 索尼株式会社 | Optical recording/reproducing apparatus, focusing method therefor, and optical disk recording medium |
| JP3700688B2 (en) | 2002-07-30 | 2005-09-28 | 船井電機株式会社 | Optical disc drive device, focus control device, and focus control method |
| US8675463B2 (en) | 2007-03-23 | 2014-03-18 | Mitsubishi Electric Corporation | Optical disc driving device |
-
1999
- 1999-04-09 JP JP11103303A patent/JP2000298846A/en active Pending
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