公开(公告)号：US09922231B1

公开(公告)日：2018-03-20

申请号：US15636105

申请日：2017-06-28

Applicant: Fingerprint Cards AB

Inventor： Frank Riedijk ,  Wouter Brevet ,  Lars Christensen ,  Søren Christensen ,  Michael Hansen

IPC: G06K9/00

CPC classification number: G06K9/0002 ,  G06K9/00067

Abstract: A method of determining a representation of a physical property of a finger using a finger sensing system comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each defining a measuring element position in the measuring arrangement, and each comprising a finger electrode spaced apart from the finger by a dielectric structure. For each of the measuring element positions, the method comprises providing a measuring configuration in which the finger electrode of a sensing measuring element defining the measuring element position exhibits a sensing finger electrode potential; the finger electrode of a first different measuring element exhibits a first different finger electrode potential; and the finger electrode of a second different measuring element exhibits a second different finger electrode potential; acquiring a measurement value based on a sensing signal; and determining the representation of the physical property of the finger based on a plurality of measurement values.