A security document circuit

G - Physics – 07 – D

Patent

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Details

G07D 7/00 (2006.01) G07D 7/12 (2006.01)

Patent

CA 2685528

The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM- radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.

L'invention porte sur l'authenticité d'un document de sécurité, tel qu'un billet de banque, qui est vérifiée en utilisant une caractéristique de sécurité placée dans ou sur le document. Une telle caractéristique de sécurité comprend une antenne placée afin de recevoir un rayonnement EM en provenance d'une source d'énergie externe ; un redresseur placé afin de recevoir de l'énergie électrique depuis l'antenne et la convertir en un courant redressé ; et un affichage électrochrome placé afin d'altérer son état électrochrome en réponse audit courant redressé. Ainsi, l'on fournit une caractéristique de sécurité apte à altérer son apparence en réponse au rayonnement EM qui comprend un affichage auquel l'on peut donner une grande variété de formes bidimensionnelles.

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