发明名称 |
Optical disk apparatus |
摘要 |
An optical disk apparatus includes an optical pickup and a signal processor. The optical pickup includes an actuator for driving an objective lens, and a detected light intensity signal output part for outputting a detected light intensity signal to the processor. The signal processor includes a servo signal generator for generating a main push-pull signal and a sub push-pull signal on the basis of the detected light intensity signal supplied from the detected light intensity signal output part, a signal generator for generating a differential push-pull signal and a lens error signal by conducting addition/subtraction on the main push-pull signal and the sub push-pull signal, and a tracking offset correction signal generator which is input with the lens error signal to output a tracking offset correction signal. The differential push-pull signal correction is conducted by conducting addition/subtraction between the differential push-pull signal and the tracking offset correction signal. |
申请公布号 |
US8305851(B2) |
申请公布日期 |
2012.11.06 |
申请号 |
US20100956167 |
申请日期 |
2010.11.30 |
申请人 |
ISSHIKI FUMIO;MARUYAMA HIDEKI;HITACHI MEDIA ELECTRONICS CO., LTD. |
发明人 |
ISSHIKI FUMIO;MARUYAMA HIDEKI |
分类号 |
G11B7/00;G11B5/55;G11B20/10;G11B20/18;G11B27/36 |
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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