发明名称 |
RFID security device for optical disc |
摘要 |
An optical disc has a security feature in the form of an RFID tag that communicates with a voltage controlled optical modifier layer in the optical disc. In the presence of an interrogation signal, the RFID tag allows the optical disc to be used normally by outputting a voltage to the optical modifier layer. In the absence of an interrogation signal, the optical modifier layer prevents a laser from reading from or writing on the optical disc. Other embodiments are also disclosed.
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申请公布号 |
US7447143(B2) |
申请公布日期 |
2008.11.04 |
申请号 |
US20060469318 |
申请日期 |
2006.08.31 |
申请人 |
MINERAL LASSEN LLC |
发明人 |
FORSTER IAN J;GINN MICHAEL G |
分类号 |
G11B3/70;G11B23/40;G11B5/84;G11B7/24;G11B7/26;G11B20/00;G11B20/10;G11B23/00;G11B23/28 |
主分类号 |
G11B3/70 |
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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