Merck Patent Gmbh

Bundesdruckerei Gmbh

Leuchtstoffwerk Breitungen Gmbh

Jakob Kuen

Manfred Paeschke

Matthias Kuntz

Oliver Muth

Burkhard Krietsch

Detlef Starick

Olaf Dressel

Sven Rösler

Christian Kunath

Monika Voh

Franziska Peinze

André Leopold

Martin Siebert

Edward Springmann

Andreas Deichsel

Detlef Märtens

Sven Roesler

Patrick Radtke

Gustav Martin Bartel

Detlev MÄRTENS

The present invention relates to a zinc sulphide phosphor and to a process for producing same. The invention further relates to a security document or document of value, to a security feature and to a method for detecting same. The phosphor according to the invention can act as electroluminescent phosphor and thus be excited by an electrical field, and this can result in emission of electroluminescent light in the blue and/or green color region of the visible spectrum. The phosphor can moreover be excited by UV radiation in the wavelength range than 345 nm to 370 nm, and can thus emit photoluminescent light in the blue color region of the visible spectrum. The phosphor can moreover be excited by UV radiation in the wavelength range from 310 nm in 335 nm, and can thus emit photoluminescent light in the green color region of the visible spectrum.

Zinc sulphide phosphor having photo- and electroluminescent properties, process for producing same, and security document, security feature and method for detecting same

The present invention relates to a machine-readable security element for security products which comprises at least one particulate substance having electroluminescent properties and a transparent, electrically conductive pigment, to a priming ink for the production of a security element of this type, and to a security product which includes the security element.

Machine-readable security element for security products

The invention relates to a machine-readable security element for security products, containing at least one particulate substance that has electroluminescent properties and a transparent, electrically conductive pigment. Also disclosed are a printing ink for producing such a security element and a security product comprising said security element.

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Berlin, Germany

Jakob Kuen