公开(公告)号：US20230063482A1

公开(公告)日：2023-03-02

申请号：US17799822

申请日：2021-02-16

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Eric SETTERBERG ,  Johan HAMMERSBERG ,  Jan BERGLUND

IPC: G06V40/12 ,  G06V40/13 ,  G06V10/143

Abstract: The present invention relates to a method for biometric authentication of a user of an electronic device comprising an optical fingerprint sensor arranged under an at least partially transparent display panel and configured to capture an image of an object located on an opposite side of the transparent display panel, the method comprises the steps of: illuminating the object with light of at least one distinguishable color; capturing at least two images of the object with an image sensor comprising a photodetector pixel array while illuminating the object with the light of at least one distinguishable color, wherein the images are captured for different applied forces by the object on the transparent display panel; and performing biometric authentication at least partly based on at least one relationship between the at least two images, the at least one relationship being related to a difference in pixel intensity from pixels in the photodetector pixel array arranged to detect light of the distinguishable color.