发明名称 |
OPTICAL DISK DEVICE, OPTICAL DISK CONTROL METHOD, AND INTEGRATED CIRCUIT |
摘要 |
To provide an optical disk device, an optical disk control method and an integrated circuit, which are capable of writing a recordable mark by changing the reflectance ratio of a reflective film formed on concave-convex pits without using an industrial special device or a high-power laser light source. A data reproduction controller (103) sets a first rotation speed in a disk rotation speed switching unit (108) and a first laser power in a laser power switching unit (107) when reproducing the concave-convex pits. When writing the recordable mark, a mark recording controller (104) sets in the disk rotation speed switching unit (108) a second rotation speed that is slower than the first rotation speed and the lowest rotation speed at which the concave-convex pits can be reproduced, and sets a second laser power greater than the first laser power in the laser power switching unit (107) in accordance with the emission timing.
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申请公布号 |
US2011299371(A1) |
申请公布日期 |
2011.12.08 |
申请号 |
US201013202434 |
申请日期 |
2010.12.17 |
申请人 |
NAKASENDO TSUYOSHI;YAMAOKA MASARU;TAKAGI YUJI;USUI MAKOTO |
发明人 |
NAKASENDO TSUYOSHI;YAMAOKA MASARU;TAKAGI YUJI;USUI MAKOTO |
分类号 |
G11B20/16;G11B7/09;G11B19/28 |
主分类号 |
G11B20/16 |
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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