发明名称 |
APPARATUS FOR AND METHOD OF DETECTING TRACKING ERROR SIGNALS |
摘要 |
<p>An apparatus for detecting a tracking error signal includes an optical detector to receive light beams reflected from an optical disc and having a plurality of detecting regions; and a phase difference extracting unit to extract a phase difference between a pair of optical signals output from the optical detector, wherein the phase difference extracting unit repeatedly moves a first graph representing one optical signal from among the pair of optical signals by a predetermined distance with respect to a second graph representing another optical signal from among the pair of optical signals , the first and second graph represent optical signal values with respect to t-axis , adds differences between optical signal values of the first graph and optical signal values of the second graph corresponding to predetermined positions of the t-axis, the adding differences is repeated for each of the repeatedly moved positions of the first graph , and outputs a moved distance of a position where the added value is smallest as a phase difference .</p> |
申请公布号 |
WO2009075417(A1) |
申请公布日期 |
2009.06.18 |
申请号 |
WO2008KR02574 |
申请日期 |
2008.05.08 |
申请人 |
SAMSUNG ELECTRONICS CO, . LTD. |
发明人 |
KIM, IN-JOO;OTSUKA, TATSUHIRO |
分类号 |
G11B7/09 |
主分类号 |
G11B7/09 |
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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