发明名称 |
Security element having a motif producing liquid crystal layer |
摘要 |
The unit (20) has a motif layer produced from a liquid crystal material (26). The liquid crystal material has a homogeneous orientation (32) in one motif-producing zone and has an isotropic or homeotropic orientation in another motif-producing zone, so that a motif produced by the zones is visible when viewed through a polarizer. An inorganic adjustment layer (24) is formed from aluminum or from aluminium oxide, and a metallic reflector is formed from a metallized plastic foil. The material is arranged over an adjustment layer, which is formed from a linear photopolymer. An independent claim is also included for a method for manufacturing a security unit. |
申请公布号 |
EP2261053(B1) |
申请公布日期 |
2012.01.18 |
申请号 |
EP20100008899 |
申请日期 |
2007.11.27 |
申请人 |
GIESECKE & DEVRIENT GMBH |
发明人 |
BURCHARD, THEODOR, DR.;HOFFMUELLER, WINFRIED, DR. |
分类号 |
B42D15/00 |
主分类号 |
B42D15/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|