发明名称 |
Optical disc player with focus pull-in function |
摘要 |
An optical disc player executes a focus pull-in operation while avoiding an inconvenience that an objective lens comes into contact with an optical disc, or the like. The objective lens is forcedly moved gradually from a position that is away from the surface of the optical disc and outside a capture range of a focus servo toward the surface of the optical disc. When the objective lens reaches the capture range of the focusing servo loop by the moving operation and a distance between the objective lens and the disc surface is at the minimum distance or is changing in a widening direction, the moving operation of the objective lens is stopped.
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申请公布号 |
US7242645(B2) |
申请公布日期 |
2007.07.10 |
申请号 |
US20020252008 |
申请日期 |
2002.09.23 |
申请人 |
PIONEER CORPORATION |
发明人 |
TAKAHASHI KAZUO;SATO MITSURU;ARAKI YOSHITSUGU |
分类号 |
G11B7/00;G11B7/085;G11B7/095 |
主分类号 |
G11B7/00 |
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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