发明名称 |
Optical disk reproducing apparatus for identifying whether the disk is a blank disc, partical disc, or a finalized disk |
摘要 |
An optical disc reproducing apparatus reproduces an optical disc having an information recording surface on which record information and control information are recorded. The apparatus is provided with: a device for rotationally driving the optical disc; a reading device for forming a light spot on the information recording surface, and receiving a reflected light to generate a read signal of the reflected light; a device for reproducing the record information and the control information from the read signal; a device for detecting whether a focus of the light spot is normal or not according to the read signal; a device for detecting whether a rotation number of the optical disc is normal or not according to the read signal; and a device for discriminating the optical disc on the basis of conditions of the detected focus and the detected rotation number.
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申请公布号 |
US5381392(A) |
申请公布日期 |
1995.01.10 |
申请号 |
US19940240491 |
申请日期 |
1994.05.10 |
申请人 |
PIONEER ELECTRONIC CORPORATION |
发明人 |
HIRA, OSAMU |
分类号 |
G11B7/00;G11B7/004;G11B7/005;G11B19/02;G11B19/06;G11B19/12;(IPC1-7):G11B7/00 |
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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