Contact imaging device

Details Contact imaging device Contact imaging device

G - Physics

06

K

G06K 9/28 (2006.01) G06K 9/00 (2006.01)

Patent

CA 2193042

A fingerprint sensing device and recognition system includes an array of closely spaced apart sensing elements each comprising a sensing electrode and anamplifier circuit. The device is used to sense electrical charge on a fingertip and obviates the need to pre-charge the sensing electrode. The device may be constructed with a single die or with multiple dies.

Dispositif de détection et de reconnaissance d'empreintes digitales comprenant une variété d'éléments détecteurs très rapprochés munis chacun d'une électrode détectrice et d'un circuit amplificateur. Le dispositif détecte la charge électrique sur le bout d'un doigt et élimine le besoin de précharger l'électrode détectrice. Le dispositif peut être fabriqué à l'aide d'une ou de plusieurs matrices.

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