公开(公告)号：EP0925581B1

公开(公告)日：2006-03-15

申请号：EP97941598.1

申请日：1997-09-15

申请人： FlexPlay Technologies Inc.

发明人： ROLLHAUS, Philip, E. ,  POWELL, John, R. ,  CARLSON, Eric, J. ,  EHNTHOLT, Daniel, J. ,  WINKLER, Irwin, C. ,  MARMO, Christopher, J. ,  VALENTINE, James, R.

IPC分类号： G11B7/24

CPC分类号： G11B20/00086 ,  G11B7/24 ,  G11B20/00608 ,  G11B20/10

摘要： An optical disc (20) having machine-readable, information-encoding features (22) is provided with a barrier layer secured to the disc. This barrier layer (24) is configured to prevent machine-reading of the features. A reading-inhibit agent (14, 34), included in the disc and activated by removal of the barrier layer, is operative, once activated, to alter the disc to inhibit reading of the disc after some period of time. Alternately, the barrier layer can be eliminated, and the reading-inhibit agent can be activated by initial reading of the disc, as for example by exposure to optical radiation associated with reading of the disc, or rotation of the disc.

摘要翻译： 具有机器可读信息编码特征的光盘具有固定到盘的阻挡层。 该阻挡层被配置为防止功能的机器读取。 包含在盘中并通过去除阻挡层激活的读取抑制剂一旦被激活就可操作，以在一段时间之后改变盘以禁止盘的读取。 或者，可以消除阻挡层，并且可以通过初始读取盘来激活读取抑制剂，例如通过暴露于与盘的读取相关联的光辐射或盘的旋转。