发明名称 |
AUTHENTICATION DEVICE FOR SECURITY DOCUMENTS |
摘要 |
An optical based authentication device that is attachable to a security document having a substrate. The authentication device includes: a piezoelectric material layer for generating an electric field in response to mechanical stress; and an optically responsive layer directly attached to the piezoelectric material layer, the attached layers being absent a direct electrical connection, the optically responsive layer being operable between a first state and a second state having different ocular perceptions. The optically responsive layer changes from the first state to the second state in response the electric field generated by the piezoelectric material layer. |
申请公布号 |
CA2847595(C) |
申请公布日期 |
2015.11.24 |
申请号 |
CA20122847595 |
申请日期 |
2012.09.19 |
申请人 |
BANK OF CANADA |
发明人 |
MACPHERSON, CHARLES DOUGLAS;GARANZOTIS, THEODOROS |
分类号 |
B42D25/36;B42D25/29;B42D25/351;B42D25/364;G02F1/01;H02N2/18 |
主分类号 |
B42D25/36 |
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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