发明名称 |
Control unit and optical disk drive including the control unit |
摘要 |
An information processing apparatus includes: a converging section for converging light; a shifting section for shifting the focus of the light by moving the converging section perpendicularly to an information storage layer of a storage medium responsive to a drive signal; a position control section for generating a position control signal to move the converging section at variable velocities; a focus control section for generating a focus control signal based on a light amount signal representing reflected light such that the focus is located in a focus controllable range; a switching section for selectively outputting the position control or focus control signal; and a driving section for outputting a drive signal responsive to the output signal.
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申请公布号 |
US7276680(B2) |
申请公布日期 |
2007.10.02 |
申请号 |
US20040596108 |
申请日期 |
2004.11.25 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YOSHIKAWA AKIRA;WATANABE KATSUYA |
分类号 |
G02B27/40;G11B7/00;G11B7/085;G11B7/09;G11B7/12 |
主分类号 |
G02B27/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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