发明申请
- 专利标题： Focus Controller and Focus Control Method
- 专利标题（中）： 对焦控制器和对焦控制方法
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申请号： US12355298申请日： 2009-01-16
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公开(公告)号： US20090185462A1公开(公告)日： 2009-07-23
- 发明人: Gwo-Huei Wu , Chih-Yuan Chen , Yuh Cheng
- 申请人： Gwo-Huei Wu , Chih-Yuan Chen , Yuh Cheng
- 申请人地址： TW Hsinchu
- 专利权人： MEDIATEK INC.
- 当前专利权人： MEDIATEK INC.
- 当前专利权人地址： TW Hsinchu
- 优先权： TW097101957 20080118
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
A focus controller and a focus control method are provided. The method allows the optical access apparatus focus from a current data layer onto a target layer. Each of the current layer and the target layer corresponds to a Spherical Aberration Compensation (SAC) value and a focus error related parameter. The method adjusts the SAC value in use to a temporary SAC value, adjusts the focus error related parameter in use to a temporary focus error related parameter, focuses on the target layer, adjusts the focus error related parameter in use to the focus error related parameter corresponding to the target layer, and adjusts the SAC value in use to the focus error related parameter corresponding to the target layer.
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