JP4234572B2 - 光ディスク装置 - Google Patents
光ディスク装置 Download PDFInfo
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- JP4234572B2 JP4234572B2 JP2003398772A JP2003398772A JP4234572B2 JP 4234572 B2 JP4234572 B2 JP 4234572B2 JP 2003398772 A JP2003398772 A JP 2003398772A JP 2003398772 A JP2003398772 A JP 2003398772A JP 4234572 B2 JP4234572 B2 JP 4234572B2
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Description
Claims (1)
- 光ディスクの記録面にレーザー光線の焦点を合わせるための光学ピックアップと、該光学ピックアップを前記光ディスク上の任意のトラック位置に移動させる駆動手段を具備し光学的に前記光ディスクの再生又は記録再生を行う光ディスク装置において、
前記光学ピックアップを前記光ディスク上の任意のトラック位置に移動させる際に、前記光学ピックアップが前記光ディスク上のあるトラックから次のトラックへの横断を検出する検出手段と、
該横断の検出に基づいて前記光ディスク上のあるトラックから次のトラックまでの周期を計測する周期計測手段と、
上記駆動手段にブレーキ電圧を印加した際に、該計測した周期がブレーキ反転の設定値を越えたことを検出することにより、フィードバックループの帯域を逸脱しない方向か否かを検出する第一の検出手段と、
該第一の検出手段によるフィードバックループの帯域を逸脱する方向の検出に応じて前記駆動手段へのブレーキ電圧の極性を反転する反転手段と、
上記計測した周期がブレーキ制御の設定値を越えたことを検出した際に、前記駆動手段へのブレーキ電圧をあらかじめ定めたパターンで段階的に小さく制御する制御手段とを具備してなることを特徴とする光ディスク装置。
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JP2003398772A JP4234572B2 (ja) | 2003-11-28 | 2003-11-28 | 光ディスク装置 |
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JP2003398772A JP4234572B2 (ja) | 2003-11-28 | 2003-11-28 | 光ディスク装置 |
Publications (2)
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JP2005158205A JP2005158205A (ja) | 2005-06-16 |
JP4234572B2 true JP4234572B2 (ja) | 2009-03-04 |
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JP2003398772A Expired - Fee Related JP4234572B2 (ja) | 2003-11-28 | 2003-11-28 | 光ディスク装置 |
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JP (1) | JP4234572B2 (ja) |
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