公开(公告)号：US11100305B2

公开(公告)日：2021-08-24

申请号：US16772929

申请日：2018-12-11

Applicant: Fingerprint Cards AB

Inventor： Martin Grip ,  Farzan Ghavanini

IPC: G06K9/00 ,  G06K9/22 ,  B06B1/02 ,  G02F1/1362 ,  G06F3/044 ,  G02F1/1333 ,  H01L27/32 ,  G06F3/041

Abstract: There is provided a display arrangement comprising an ultrasonic biometric sensing device. The display arrangement comprises: a cover plate having a sensing surface configured to be touched by a finger; a display panel comprising a plurality of sub-layers; a plurality of ultrasonic transducers arranged along the periphery of the display arrangement and outside of an active display area of the display arrangement, each ultrasonic transducer comprising a top and bottom electrode; and ultrasonic transducer control circuitry to control the ultrasonic transducers to determine properties of an object in contact with the sensing surface. One of the sub-layers in the display panel comprises a protruding portion extending outside of an area of any other sub-layer located between the sub-layer comprising the protruding portion and the cover plate, and the plurality of ultrasonic transducers are arranged on the protruding portion between the protruding portion and the cover plate.