CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2020-0086221 filed on Jul. 13, 2020, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties.

BACKGROUND

Example embodiments of the inventive concepts described herein relate to an electronic device. For example, at least some example embodiments relate to an electronic device performing fingerprint authentication and/or an operation method thereof.

Recent electronic devices provide various functions depending on operations of various electronic circuits/modules/chips included therein. Electronic devices such as a computer, a smartphone, a tablet, and the like include electronic circuits, modules, or chips for the purpose of providing various functions.

Nowadays, as the security of an electronic device becomes more important, the electronic device performs various user authentication functions for providing a service to an authenticated user. For example, fingerprint detection and recognition is one of user authentication functions being widely used. The electronic device may provide a user authentication function of detecting a user fingerprint and determining whether the detected user fingerprint is matched with an authentication fingerprint stored in advance. However, as a technique for faking a fingerprint develops, user authentication may be performed through a faked fingerprint. Accordingly, there is required a technique for preventing a fingerprint from being faked, for example, a technique such as anti-spoofing.

SUMMARY

Example embodiments of the inventive concepts provide an electronic device with improved reliability and/or an operation method thereof.

According to an example embodiment, an electronic device configured to perform fingerprint authentication may include a touch panel including a plurality of row touch lines and a plurality of column touch lines; a touch driver configured to control the plurality of row touch lines and the plurality of column touch lines to obtain secondary biometrics including touch profile information, first indicator information, and second indicator information associated with a fingerprint of a user, in response to the electronic device operating in a fingerprint sensing mode; a fingerprint sensor configured to obtain fingerprint information from the fingerprint of the user, in response to the electronic device operating in the fingerprint sensing mode; and processing circuitry configured to, perform a fingerprint matching operation and an anti-spoofing operation based on the fingerprint information and the secondary biometrics to output an authentication result, and perform a security operation based on the authentication result.

According to an example embodiment, a method of operating an electronic device to perform fingerprint authentication may include: controlling a plurality of row touch lines and a plurality of column touch lines to sense a touch of a user, in response to the electronic device operating in a normal mode; obtaining fingerprint information from a fingerprint of the user, in response to the electronic device operating in a fingerprint sensing mode; controlling the plurality of row touch lines and the plurality of column touch lines to obtain secondary biometrics including touch profile information, first indicator information, and second indicator information associated with the fingerprint of the user, in response to the electronic device operating in the fingerprint sensing mode; performing a fingerprint matching operation and an anti-spoofing operation based on the fingerprint information, the touch profile information, the first indicator information, and the second indicator information to generate an authentication result, in response to the electronic device operating in the fingerprint sensing mode; and performing a security operation based on the authentication result.

According to an example embodiment, an electronic device configured to perform fingerprint authentication, the electronic device comprising: a touch panel including a plurality of touch lines extending along a row direction and a column direction; a touch driver configured to, in response to the electronic device operating in a normal mode, control the plurality of touch lines based on a first driving scheme and a second driving scheme to sense a touch of a user, and in response to the electronic device operating in a fingerprint sensing mode, control the plurality of touch lines based on the first driving scheme to obtain touch profile information, control the plurality of touch lines based on the second driving scheme to obtain first indicator information, and control the plurality of touch lines based on a third driving scheme to obtain second indicator information; a fingerprint sensor configured to obtain fingerprint information from the fingerprint of the user, in response to the electronic device operating in the fingerprint sensing mode; and an application processor configured to perform, a fingerprint matching operation and an anti-spoofing operation on the fingerprint information and secondary biometrics, and perform a security operation in response to results of the fingerprint matching operation and the anti-spoofing operation.

According to an example embodiment, a method of operating a touch driver to control a touch panel including a plurality of touch lines extending along a row direction and a column direction includes in response to the touch driver operating in a touch sensing mode, controlling the plurality of touch lines based on a mutual-cap driving scheme to generate first touch data; controlling the plurality of touch lines based on a first self-cap driving scheme to generate second touch data, the first self-cap driving scheme being a scheme in which a phase of a first touch signal provided to touch lines extending in the row direction from among the plurality of touch lines is same as a phase of a second touch signal provided to touch lines extending to the column direction from among the plurality of touch lines. Further, in response to the touch driver operating in a fingerprint sensing mode, the method includes controlling the plurality of touch lines based on the mutual-cap driving scheme to generate a touch profile; controlling the plurality of touch lines based on the first self-cap driving scheme to generate first indicator information; and controlling the plurality of touch lines based on a second self-cap driving scheme to generate second indicator information, the second self-cap driving scheme being a scheme in which a phase of a third touch signal provided to the touch lines extending in the row direction is reverse to a phase of a fourth touch signal provided to the touch lines extending to the column direction.

