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Device and method for contactless excitation of electroluminescent pigments

A non-contact, luminescent technology, applied in information-carrying cards, banknote authenticity inspection, instruments, etc., can solve problems such as insufficient satisfaction, achieve the effect of improving reliability and simple structural construction

Active Publication Date: 2018-11-09
BUNDESDRUCKEREI GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Existing devices for plausibility checks do not adequately meet these requirements

Method used

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  • Device and method for contactless excitation of electroluminescent pigments
  • Device and method for contactless excitation of electroluminescent pigments
  • Device and method for contactless excitation of electroluminescent pigments

Examples

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Embodiment Construction

[0079] In the following, the same reference numerals denote elements having the same or similar technical features.

[0080] in figure 1 It is shown to be used to contactlessly incentivize valuable or secure documents 2 (see for example image 3 ) Is a schematic circuit block diagram of the device 1 of at least one electroluminescent pigment (not shown). The device 1 includes a DC voltage source 3, such as a battery. The DC voltage source 3 is electrically connected to the inverter 4, and the device 1 also includes the inverter. With the inverter 4, the output voltage of the DC voltage source 3 can be converted into an AC voltage with a predetermined excitation frequency. On the output side, the inverter 4 is electrically connected to the transformer 5. The transformer 5 converts the AC voltage generated by the inverter 4 into an excitation voltage having a desired amplitude. On the output side, the transformer 5 is connected to the electrode 6 shown schematically, wherein the...

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PUM

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Abstract

The invention relates to a document verification device comprising a device for contactless excitation of at least one electroluminescent pigment in an especially valuable or security document (2), wherein the device (1) comprises at least one An electrode (6), wherein the at least one electrode (6) is configured such that the electric flux density of a field (7) that can be generated by the electrode (6) in a predetermined radiation direction (9) varies. The invention also relates to a method for contactless actuation.

Description

Technical field [0001] The invention relates to a device and a method for contactlessly energizing at least one electroluminescent pigment in particularly valuable or secure documents. Background technique [0002] Valuable or secure documents, such as banknotes, ID cards, credit cards, etc., can have so-called security features or authenticity features that are applied to or in the document. For example, the safety feature can be stimulated from the outside and analyzed during or after the stimulation. A typical authenticity feature is fluorescent pigments, which flicker when excited by a specific sensor and can thus be verified. [0003] It is also known to arrange electroluminescent pigments in or on value or security documents. [0004] EP 1 631 461 B1 discloses a document of value, which has at least one security element comprising a marking layer comprising electroluminescent pigments applied on a carrier in a marking area, wherein A plurality of field shifting elements elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/04G07D7/1205B42D25/29
CPCB42D2033/20B42D2035/34B42D25/29G07D7/1205G07D7/02
Inventor J·菲舍尔M·蒂柯S·特勒伦贝格O·库利科夫斯卡L·库利科夫斯基P·克吕格尔M·佩施克
Owner BUNDESDRUCKEREI GMBH