发明名称 |
OPTICAL DISC APPARATUS AND DEFOCUS CORRECTING METHOD |
摘要 |
An optical disc apparatus in which a bias of a focusing error signal is changed to a value according to a recording power at timing corresponding to a predetermined address position before starting the recording and a defocus of an opposite polarity is preliminarily caused so as to set off a defocus which occurs at the start of the recording. |
申请公布号 |
US2012106307(A1) |
申请公布日期 |
2012.05.03 |
申请号 |
US201213349407 |
申请日期 |
2012.01.12 |
申请人 |
ISHIKAWA YOSHINORI;JIN GOHSHI;HITACHI CONSUMER ELECTRONICS CO., LTD.;HITACHI-LG DATA STORAGE, INC. |
发明人 |
ISHIKAWA YOSHINORI;JIN GOHSHI |
分类号 |
G11B7/1392;G11B7/0045 |
主分类号 |
G11B7/1392 |
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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