Fingerprint recognition device, surface foreign matter detection method thereof and electronic equipment

A fingerprint recognition and foreign object detection technology, applied in the field of information recognition, to reduce the probability of illegal cracking and the probability of being illegally cracked.

Inactive Publication Date: 2020-12-01
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes the current fingerprint identif

Method used

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  • Fingerprint recognition device, surface foreign matter detection method thereof and electronic equipment
  • Fingerprint recognition device, surface foreign matter detection method thereof and electronic equipment
  • Fingerprint recognition device, surface foreign matter detection method thereof and electronic equipment

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Embodiment Construction

[0083] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0084] The following describes the fingerprint recognition device and the method and device for detecting foreign matter on the surface according to the embodiments of the present invention with reference to the accompanying drawings.

[0085] It should be noted that under normal circumstances, if the fingerprint identification device is in a non-touch state, there should be no conductors on it. At this time, if there are conductors, it indicates that the fingerprint identification device may be illegally cracked. Therefore, the ...

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Abstract

The invention discloses a fingerprint recognition device and a surface foreign matter detection method and device thereof, and electronic equipment. The method comprises the following steps: obtaininga current capacitance value of the fingerprint recognition device in at least one scanning mode; obtaining a capacitance difference value between the current capacitance value and a reference capacitance value of the fingerprint recognition device in a state of no foreign object contact; and detecting and determining that at least one capacitance difference value is greater than a preset difference value threshold, and recognizing that foreign matters exist on the surface of the fingerprint recognition device. The method can effectively detect whether foreign matters exist on the surface of the fingerprint recognition device or not so as to protect the fingerprint recognition device and prevent the fingerprint recognition device from being illegally cracked.

Description

technical field [0001] The invention relates to the technical field of information identification, in particular to a fingerprint identification device, a method for detecting foreign objects on its surface, and electronic equipment. Background technique [0002] With the development of biometric technology, fingerprint recognition has been widely used in people's lives. For example, fingerprint recognition technology is widely used in current smart phones, smart locks and other devices. Although fingerprint recognition technology improves the convenience of people's life, it also brings security risks to people's life. [0003] At present, there is a method for cracking fingerprint recognition devices on the Internet. It only needs a conductive pen and a roll of scotch tape to crack most of the fingerprint recognition devices on the market. It uses a conductive pen to draw some patterns on the transparent tape, and sticks the part of the tape with the conductive pattern on...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/1306G06F18/00
Inventor 李振刚黄臣
Owner BYD SEMICON CO LTD
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