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Capacitive-type fingerprint recognition device and method

A fingerprint identification and capacitive technology, which is applied in character and pattern recognition, acquisition/organization of fingerprints/palmprints, instruments, etc., can solve the problems of large size, high cost of sensing elements, etc., and achieve good image quality and good adjustment completion , good resolution effect

Active Publication Date: 2016-12-07
世维人工智能(嘉兴)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned problems in the prior art that optical fingerprint recognition requires a large volume and requires a large number of sensing elements and high cost, and provides a capacitive fingerprint recognition device and a recognition method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]A capacitive fingerprint identification device, comprising a sensor array unit, an AD converter, a processor, a memory, a bus interface and a computer, the processor is electrically connected to the sensor array unit through address lines, data lines and control lines, the The sensor array unit is electrically connected to the processor through an AD converter, the processor is also electrically connected to the memory, the processor is connected to the computer through a bus interface, and the sensor array unit includes a sensor array , a row decoder, a sample and hold array, a column decoder and an amplifier, the processor is connected to the sensor array through the row decoder, and the processor is also connected to the sensor array through the column decoder and the sample and hold array in turn, and the sample and hold array It is connected with the input end of the AD converter through an amplifier. The sensing elements in the sensor array are capacitive sensing e...

Embodiment 2

[0039] This embodiment is basically the same as Embodiment 1, except that there is a difference in contrast between the images of all contrast areas after denoising, and it is determined that there is the most average gray value in the images of the contrast areas, and the gray value is adjusted according to the preset The average value of the intensity value is extended to a range value and this range value is determined as the reference gray value, the overall gray value of the contrast area close to the reference gray value is maintained, and then the overall gray value of the contrast area far from the reference gray value is adjusted. Gray value, adjust the gray value of all images in the comparison area to be consistent and then merge to obtain the reference graphic; at the same time, determine that there is an average value of the second-to-last least gray value in the image of the comparison area, and according to the preset, the second-to-last Extend it to a range valu...

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PUM

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Abstract

The invention relates to a capacitive-type fingerprint recognition device, and irons out the defects in the prior art. The technical scheme of the invention is that the device comprises a sensor array unit, an AD converter, a processor, a storage unit, a bus interface, and a computer; the processor is electrically connected with the sensor array unit through an address line, a data line and a control line; the sensor array unit is electrically connected with the processor through the AD converter; the processor is also electrically connected with the storage unit; the processor is connected with the computer through a bus interface; the sensor array unit comprises a sensor array, a row decoder, a sampling holding array, a column decoder, and an amplifier; the processor is connected with the sensor array through the row decoder; the processor is also connected with the sensor array through the column decoder and the sampling holding array; and the sampling holding array is connected with the input end of the AD converter through the amplifier.

Description

technical field [0001] The invention relates to a fingerprint identifier, in particular to a capacitive fingerprint identification device and an identification method thereof. Background technique [0002] At present, most of the domestic fingerprint recognition technologies are based on image recognition technology. Generally speaking, when the finger is photographed on the recognizer, the image of the finger is obtained and then compared. However, fingerprint identification in optical form requires a larger volume, more sensing elements, and higher cost. Although the recognition rate is high, there are many problems in some places where the volume of the elements is required, for example, Nowadays, it is difficult to achieve correct identification through optical identification for fingerprint unlocking of mobile phones. Under normal circumstances, it is difficult to achieve such a small volume. In the case of mobile phones with a high degree of integration, it is difficul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1306
Inventor 吴洋
Owner 世维人工智能(嘉兴)有限公司
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