Device for recording a fingerprint

G - Physics – 06 – K

Patent

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Details

G06K 9/00 (2006.01)

Patent

CA 2579158

A device for recording a fingerprint (1) is disclosed, comprising a transparent cover layer (7), forming a finger rest, with a layer of light- sensitive elements (9) in a matrix arrangement, connected to an analytical circuit (10) and light-emitting elements (8), provided on the side thereof facing away from the finger rest. According to the invention, advantageous construction conditions may be achieved, whereby a photoactive layer (2) of organic semiconductor is arranged between two electrode layers (3, 4) of crossing conductor tracks (5, 6) on the side of the cover layer (7) opposite the finger rest, of which the conductor tracks (5) between the photoactive layer (2) and the cover layer (7) have a transparent embodiment and the photoactive layer (2) forms the light-sensitive and the light-emitting elements (8, 9) in the overlapping regions of the conductor tracks (5, 6) of both electrode layers (3, 4).

L'invention concerne un dispositif pour enregistrer une empreinte digitale (1), pourvu d'une couche extérieure (7) laissant passer la lumière et formant un appui pour le doigt, la face de la couche extérieure qui est opposée à l'appui étant pourvue d'éléments électroluminescents (8) et d'une couche d'éléments photosensibles (9) agencés en une matrice, laquelle couche est reliée à un circuit d'analyse (10). L'objectif de cette invention est de créer des conditions de construction avantageuses. A cet effet, une couche photoactive (2) à base de semiconducteurs organiques, intercalée entre deux couches d'électrode (3, 4) constituées de pistes conductrices entrecroisées (5, 6), est appliquée sur la face de la couche extérieure (7) qui est opposée à l'appui pour le doigt, les pistes conductrices (5) situées entre la couche photoactive (2) et la couche extérieure (7) étant conçues de façon à laisser passer la lumière, et la couche photoactive (2) forme les éléments photosensibles et électroluminescents (8, 9) dans la zone d'intersection des pistes conductrices (5, 6) des deux couches d'électrode (3, 4).

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