07427029 is referenced by 5 patents and cites 15 patents.

A valuable document comprising at least one security element that is provided with a marking layer in a marking region, the layer containing an electroluminescent pigment and being applied to a carrier body. The electroluminescence of the pigment of one such valuable document must be able to be excited even with comparably low, externally applied field intensities. To this end, a plurality of electrically insulated field displacement elements having a minimum dielectric constant of 100 are distributed over the surface of the marking region, the field displacement elements being at a distance of approximately between 5 μm to 500 μm from each other and compressing the applied field in the gaps thereinbetween.

Title
Valuable document comprising a security element and method for producing said valuable document
Application Number
10/558957
Publication Number
7427029 (B2)
Application Date
March 31, 2004
Publication Date
September 23, 2008
Inventor
Martin Sprenger
Berlin
DE
Konstantin Pötschke
Berlin
DE
Manfred Paeschke
Basdorf
DE
Daniel Grammlich
Karlsruhe
DE
Hans Demanowski
Woltersdorf
DE
Arnim Franz Burgholz
Falkensee
DE
Anett Bailleu
Berlin
DE
Agent
Darby & Darby
Assignee
Bundesdruckerei
DE
IPC
G06K 19/00
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