The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 2017
Filed:
Dec. 12, 2014
Bundesdruckerei Gmbh, Berlin, DE;
Leuchtstoffwerk Breitungen Gmbh, Breitungen, DE;
Detlef Starick, Berlin, DE;
Manfred Paeschke, Basdorf, DE;
Sven Roesler, Eisenach, DE;
Jakob Kuen, Berlin, DE;
Andreas Deichsel, Berlin, DE;
Christian Kunath, Berlin, DE;
Monika Voh, Breitungen, DE;
LEUCHTSTOFFWERK BREITUNGEN GMBH, , DE;
BUNDESDRUCKEREI GMBH, , DE;
Abstract
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.