发明名称 |
High-frequency superimposing method and optical disk apparatus using it |
摘要 |
An optical disk drive includes drive current generation unit for supplying a mark forming semiconductor laser drive current and a space forming semiconductor laser drive current; first high-frequency superimposition unit for superimposing a high-frequency component on the space forming semiconductor laser drive current; and high-frequency superimposition control unit for controlling the first high-frequency superimposition unit to stop the superimposition of the high-frequency component for a predetermined duration prior to a timing at which to switch from the space forming semiconductor laser drive current to the mark forming semiconductor laser drive current, eliminating positional variations on the disk of the mark leading and trailing edges due to the high frequency superimposition.
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申请公布号 |
US2003117923(A1) |
申请公布日期 |
2003.06.26 |
申请号 |
US20020281274 |
申请日期 |
2002.10.28 |
申请人 |
ASADA AKIHIRO;KUREBAYASHI MASAAKI |
发明人 |
ASADA AKIHIRO;KUREBAYASHI MASAAKI |
分类号 |
G11B7/0045;G11B7/00;G11B7/004;G11B7/006;G11B7/125;G11B20/12;(IPC1-7):G11B7/004 |
主分类号 |
G11B7/0045 |
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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