发明名称 |
RFID SECURITY DEVICE FOR OPTICAL DISC |
摘要 |
<p>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.</p> |
申请公布号 |
EP1540411(A2) |
申请公布日期 |
2005.06.15 |
申请号 |
EP20030748409 |
申请日期 |
2003.09.10 |
申请人 |
MINERAL LASSEN LLC |
发明人 |
FORSTER, IAN JAMES;GINN, MICHAEL G. |
分类号 |
G11B23/40;G06Q20/20;G11B7/24;G11B20/00;G11B20/10;G11B23/00;G11B23/28;(IPC1-7):G02F1/13 |
主分类号 |
G11B23/40 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|