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Fingerprint identification sensor capable of quickly identifying

A fingerprint identification and sensor technology, which is applied in the direction of acquiring/arranging fingerprints/palmprints, instruments, characters and pattern recognition, etc., and can solve the problems of long fingerprint identification time, etc.

Inactive Publication Date: 2017-02-15
ROUND P TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fast identification fingerprint identification sensor to solve the problem that the fingerprint identification time of the C-V-T type capacitive sensor circuit in the prior art is too long

Method used

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  • Fingerprint identification sensor capable of quickly identifying
  • Fingerprint identification sensor capable of quickly identifying
  • Fingerprint identification sensor capable of quickly identifying

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Experimental program
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Embodiment Construction

[0015] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0016] Related to the detailed description and technical content of the present invention, it is now described as follows with respect to the accompanying drawings, please refer to figure 1 and figure 2 Shown are the schematic diagram of the circuit structure of the first embodiment of the present invention and figure 1 The equivalent circuit diagram includes a substrate 10, a conductive plate 20, a passivation layer 30, a charging capacitor C0, a switch group and an analog-to-digital converter 40, the conductive plate 20 is arranged on the substrate 10, the passivation The layer 30 is disposed on the conductive plate 20 and is close to a finger 50 to detect a fingerprint. In the present invention, approaching refers to that the finger 50 is close to the passivation layer 30 and keeps a distance therefrom (such as the case ...

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Abstract

A fingerprint identification sensor capable of quickly identifying comprises a substrate, a current-conducting plate, a passivation layer, a charging capacitor, a switching group and an analog-digital converter. The current-conducting plate is arranged on the substrate; the passivation layer is arranged on the current-conducting plate and is close to a finger for detecting a fingerprint; the switching group comprises a first switch and a second switch, the first switch being used for controlling an input voltage to charge the charging capacitor, and the two ends of the second switch being respectively and electrically connected to the current-conducting plate as well as the first switch and the charging capacitor; the analog-digital converter is electrically connected to the charging capacitor; the second switch is used for controlling the charging capacitor to share charges for a plurality of times; and the analog-digital converter is used for outputting a fingerprint identification signal according to a residual voltage obtained after charge sharing.

Description

technical field [0001] The invention relates to a fingerprint identification sensor, in particular to a fast identification fingerprint identification sensor. Background technique [0002] With the increasing emphasis on personal data protection and privacy rights, the methods for identifying individuals have also evolved. Compared with existing methods such as signature identification and password identification that are easy to be imitated or embezzled, the recent emphasis on personal uniqueness and individual Biometrics with differences between individuals are gradually applied to the field of identity recognition, such as facial contour recognition, iris recognition and fingerprint recognition, etc. The industrial applicability is the highest, and it is flourishing and widely used in many industries. [0003] Fingerprint identification has been widely used in many industries, such as Chinese Invention Patent Publication No. CN102954753A, which discloses a capacitive dis...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06V30/144
CPCG06V40/1306G06F3/044G06V40/1312H03G3/001H03M1/001
Inventor 徐荣国
Owner ROUND P TECH
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