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Fingerprint acquiring circuit and fingerprint sensor

A fingerprint collection and circuit technology, which is applied in acquiring/organizing fingerprints/palmprints, printing image collection, instruments, etc. The effect of improving accuracy

Pending Publication Date: 2017-07-25
SHENZHEN FINGERCHIP INTELLIGENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a fingerprint collection circuit, which aims to solve the problem that traditional fingerprint collection sensors can only collect fingerprint morphology and minutiae features, but cannot collect fingerprint sweat pores that require higher resolution, resulting in fingerprint identification. The problem of reduced accuracy

Method used

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  • Fingerprint acquiring circuit and fingerprint sensor
  • Fingerprint acquiring circuit and fingerprint sensor
  • Fingerprint acquiring circuit and fingerprint sensor

Examples

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no. 1 example

[0039] figure 1 A block diagram of the fingerprint acquisition circuit provided by the embodiment of the present invention is shown, and for convenience of description, only parts related to the embodiment of the present invention are shown.

[0040] A fingerprint acquisition circuit, said fingerprint acquisition circuit comprising:

[0041] The minutiae feature of the fingerprint and the pixel array 1 of the fingerprint sweat pores are collected. In this embodiment, the minutiae features of the fingerprint include the starting point, ending point, joining point, bifurcation point, etc. of the fingerprint lines.

[0042] As an embodiment of the present invention, the pixel array 1 includes 1280×1024 pixel units, that is, the number of pixels contained in the pixel array 1 is 1280×1024, and the resolution can be as high as 2400DPI. The pixel array 1 can not only collect fingerprints Morphological and detailed point features can also clearly collect the fingerprint sweat pores...

no. 2 example

[0071] The second embodiment of the present invention provides a fingerprint sensor, the fingerprint sensor includes the fingerprint acquisition circuit provided in the first embodiment, the pixel array 1 in the fingerprint acquisition circuit is packaged on the outer surface of the fingerprint sensor, For collecting fingerprints, other modules in the fingerprint collecting circuit are packaged inside the fingerprint sensor and lead out pins.

[0072] Figure 5 A pin diagram of the fingerprint sensor provided by the second embodiment of the present invention is shown, and for convenience of description, only parts related to the embodiment of the present invention are shown.

[0073] Table 1 is a description of some pins of the fingerprint sensor.

[0074] Table I

[0075]

[0076]

[0077] As an embodiment of the present invention, the pins can be patched.

[0078] Image 6 A schematic diagram showing the external dimensions of the fingerprint sensor provided by the...

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Abstract

The invention is applied to the field of fingerprint identification, and in particular to a fingerprint acquiring circuit and a finger print sensor. According to the embodiments of the invention, the fingerprint acquiring circuit includes: a pixel array which acquires detail point features and fingerprint sweat pores of fingers, a vertical scanning circuit which vertically scans fingerprints, a fixed mode noise compensation circuit which conducts noise compensation on the finger print images which are obtained by vertical scanning, and a horizontal scanning circuit which horizontally scans the fingerprints. According to the embodiments of the invention, the pixel array can acquire detail point features of fingerprints and can clearly acquire fingerprint sweat pores, the fingerprint acquiring circuit can separately conduct vertical pixel scanning, noise compensation and horizontal pixel scanning on the fingerprints. The fingerprint acquiring circuit can more effectively and accurately acquire the fingerprint sweat pores of a person by acquiring and identifying the fingerprint sweat pores in addition to traditional identifying detail point features of the fingerprints, thus increasing the accuracy of identifying the fingerprints.

Description

technical field [0001] The invention belongs to the technical field of fingerprint recognition, and in particular relates to a fingerprint collection circuit and a fingerprint sensor. Background technique [0002] The fingerprint identification system performs fingerprint identification by collecting and identifying the morphology and details of human fingerprints. With the expansion of the application scope of the fingerprint identification system, people put forward higher and higher requirements for the security of the system, and the fingerprint identification system based on the fingerprint morphology and minutiae features has been increasingly unable to meet the requirements of high security fields. Therefore, it is more and more important to introduce new fingerprint features, namely fingerprint sweat pores, to improve the security of the fingerprint identification system. [0003] In the current fingerprint identification system, the sensors used for fingerprint ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1353G06V40/1318G06V10/30
Inventor 余俊易海平
Owner SHENZHEN FINGERCHIP INTELLIGENT TECH
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