Invention Grant
- Patent Title: Capacitive fingerprint sensing device and method for capturing a fingerprint using the sensing device
-
Application No.: US15409803Application Date: 2017-01-19
-
Publication No.: US09898640B2Publication Date: 2018-02-20
- Inventor: Farzan Ghavanini
- Applicant: Fingerprint Cards AB
- Applicant Address: SE Göteborg
- Assignee: FINGERPRINT CARDS AB
- Current Assignee: FINGERPRINT CARDS AB
- Current Assignee Address: SE Göteborg
- Agency: RMCK Law Group PLC
- Priority: SE1650592 20160502
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06F3/044

Abstract:
There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, the capacitive fingerprint sensing device comprising: a protective dielectric top layer having an outer surface forming a sensing surface to be touched by the finger; at least one electrically conductive sensing structure arranged underneath the top layer; readout circuitry coupled to the at least one electrically conductive sensing structure to receive a sensing signal indicative of a distance between the finger and the sensing structure; and a plurality of individually controllable electroacoustic transducers arranged underneath the top layer and configured to generate a focused ultrasonic beam, and to transmit the ultrasonic beam through the protective dielectric top layer towards the sensing surface to induce an ultrasonic vibration potential in a ridge of finger placed in contact with the sensing surface at the location of the ultrasonic beam.
Public/Granted literature
- US20170316243A1 CAPACITIVE FINGERPRINT SENSING DEVICE AND METHOD FOR CAPTURING A FINGERPRINT USING THE SENSING DEVICE Public/Granted day:2017-11-02
Information query