发明名称 SECURITY ARRANGEMENT WITH LIQUID-CRYSTAL LAYER
摘要 The invention relates to a security arrangement for security papers, documents of value and the like, having a transparent security element (12) which has a first linear polarizer and a layer made of a cholesteric liquid-crystalline material arranged above the linear polarizer, and having a transparent verification element (14) which has a second linear polarizer crosswise in relation to the first linear polarizer, in which case, when the transparent security element (12) is positioned on the transparent verification element (14), the first and second linear polarizers form a dark background for the cholesteric liquid-crystal layer, wherein at least one of the linear polarizers contains a motif (20) which is in the form of patterns, symbols or a coding and becomes visible once the security element (12) has been positioned on the verification element (14).
申请公布号 WO2008058670(A1) 申请公布日期 2008.05.22
申请号 WO2007EP09686 申请日期 2007.11.08
申请人 GIESECKE & DEVRIENT GMBH;HOFFMUELLER, WINFRIED;BURCHARD, THEODOR 发明人 HOFFMUELLER, WINFRIED;BURCHARD, THEODOR
分类号 B42D15/00 主分类号 B42D15/00
代理机构 代理人
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