发明名称 |
Method for adjusting focus bias in optical disc drive and optical disc drive that can implement the method |
摘要 |
A method for adjusting a focus bias in an optical disc drive comprises the steps of: rotationally driving an optical disc in a state that only focus servo is engaged without engaging tracking servo; driving an actuator of an optical pick-up so that a laser beam projected from the optical pick-up is moved in a tracking direction to obtain an HF signal; and determining a focus bias by which a proper focusing point can be obtained based on the HF signal. The driving of the actuator is carried out by supplying an actuator drive control signal to a tracking actuator of the optical pick-up in a state that tracking servo is not engaged.
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申请公布号 |
US2004218486(A1) |
申请公布日期 |
2004.11.04 |
申请号 |
US20040815175 |
申请日期 |
2004.03.26 |
申请人 |
FURUKAWA KENICHI;MAEKAWA YUICHI |
发明人 |
FURUKAWA KENICHI;MAEKAWA YUICHI |
分类号 |
G11B7/085;G11B7/09;(IPC1-7):G11B7/09 |
主分类号 |
G11B7/085 |
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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