Maksim Alexeevich VILENSKII,Andrey Vladimirovich KLETSOV,Aleksei Andreevich GAVRON,Alexander Gennadyevich CHERNOKALOV
申请号：
US15851612
公开号：
US20180181734A1
申请日:
2017.12.21
申请国别(地区):
US
年份:
2018
代理人:
摘要：
The disclosure relates to biometric authentication of a user, in particular, to a method for determining whether to allow user access based on a user input at electronic device, the method comprising: detecting a touch by an object on a touch-sensitive area of an electronic device, in which a plurality of electrode pairs are mounted, the plurality of electrode pairs including a first set of electrode pairs and a second set of electrode pairs； determining a subset of the first set of electrode pairs that are in contact with a part of the object； receiving electrical signals from each pair of the determined subset； calculating impedance values of respective parts of the object on the basis of the received electrical signals； determining a ratio of the calculated impedance values for each pair of electrode pairs disposed on mutually perpendicular lines from said the determined subset, and, if a first impedance value for one electrode pair included in electrode pairs disposed on the mutually perpendicular lines is greater than a second impedance value for the other electrode pair in the electrode pairs, the ratio of the calculated impedance values is a ratio of the first impedance to the second impedance； selecting two pairs of electrode pairs disposed on the mutually perpendicular lines with the maximum ratio of the calculated impedance values； and if the maximum ratio exceeds a predetermined threshold, identifying the object as a living tissue object, and allow access on the electronic device.
