CN105205440A - Data processing method for fingerprint sensor and electronic device - Google Patents
Data processing method for fingerprint sensor and electronic device Download PDFInfo
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- CN105205440A CN105205440A CN201510082225.0A CN201510082225A CN105205440A CN 105205440 A CN105205440 A CN 105205440A CN 201510082225 A CN201510082225 A CN 201510082225A CN 105205440 A CN105205440 A CN 105205440A
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Abstract
The invention discloses a data processing method for a fingerprint sensor, which comprises the steps of S11, judging whether the fingerprint sensor carries out fingerprint scanning or not, if not, getting into a step S12, and if yes, getting into a step S13; S12, detecting and storing noise signals of the fingerprint sensor; S13, receiving a plurality of fingerprint signals outputted by the fingerprint sensor; S14, outputting the plurality of fingerprint signals to a data converter through two different channels according to two time sequences; and S15, carrying out noise elimination on the plurality of fingerprint signals, which are processed by the data converter, by using the noise signals. According to the data processing method disclosed by the invention, time-division detection for noises and the fingerprint signals is adopted in processing for the noises of the fingerprint sensor, the noises are eliminated when fingerprint signal detection is carried out, and the detection precision of the fingerprint signals is improved; and the fingerprint signals outputted by the fingerprint sensor are outputted by adopting a multi-channel time division multiplexing mode, thereby reducing requirements for the signal transmission speed, and avoiding a problem of excessive power consumption of the fingerprint sensor. The invention further discloses an electronic device.
Description
Technical field
The present invention relates in fingerprint detection field, more specifically, relate to a kind of data processing method for fingerprint sensor and a kind of electronic installation.
Background technology
In fingerprint detection, due to the fingerprint characteristic distributions of finger surface, fingerprint sensor needs a large amount of sensing units to obtain the fingerprint signal of sufficient amount and resolution usually.In general, the sensing unit array of fingerprint sensor is Two dimensional Distribution, when carrying out finger scan, these sensing units complete the seizure of fingerprint characteristic and export corresponding fingerprint signal, the fingerprint signal detected processes by electronic installation simultaneously accordingly, such as fingerprint signal exports to data converter process, stores or exports afterwards to the fingerprint signal processed.
The internal data processing power of above-mentioned processing mode to electronic installation proposes very high requirement.Because in order to meet the frame per second of fingerprint detection, it is very short that the fingerprint signal that each sensing unit exports is transferred to time of next stage, and due to the larger area of detection arrays, the power that the consumption of the fingerprint signal causing sensing unit to export transmission needs is very large.And the fingerprint signal that sensing unit detects includes interference volume usually, need these interference volumes to distinguish and filtering, and adopt above-mentioned processing mode to need to consume a large amount of system resource, add system power dissipation undoubtedly.
Summary of the invention
The present invention is intended at least to solve one of technical matters existed in prior art.For this reason, the present invention needs to provide a kind of data processing method for fingerprint sensor and a kind of electronic installation.
For a data processing method for fingerprint sensor, comprise the following steps:
S11: judge whether this fingerprint sensor carries out finger scan, if not, enters step S12, if so, enters step S13;
S12: detect and store the noise signal of this fingerprint sensor;
S13: receive multiple fingerprint signals that this fingerprint sensor exports;
S14: respectively according to two or more sequential, exports the plurality of fingerprint signal to data converter at two or more different passages respectively;
S15: utilize this noise signal to carry out noise elimination to the plurality of fingerprint signal through this data converter process.
Above-mentioned data processing method, to the process of fingerprint sensor noise, adopts and detects noise and fingerprint signal timesharing, stored by noise, eliminated by noise, improve the accuracy of detection of fingerprint signal when pending fingerprint signal detects; And for the fingerprint signal that fingerprint sensor exports, adopt the mode of multichannel time-sharing multiplex to export, thus increase available data transmission period, significantly reduce the requirement to signaling rate and fingerprint sensor power consumption problems of too.
In one embodiment, this data processing method also comprises step S16: store or output noise eliminate after the plurality of fingerprint signal.
In one embodiment, in step S14, respectively according to the first sequential, the second sequential and the 3rd sequential, by the plurality of fingerprint signal respectively at first passage, export this data converter at second channel and at third channel, this first sequential and this second sequential are different sequential with the 3rd sequential, and this first passage and this second channel are different passage with this third channel.
In one embodiment, this data processing method also comprises step S17: the plurality of fingerprint signal after eliminating noise carries out filtering process.
A kind of electronic installation, comprises fingerprint sensor, sampling hold circuit, data converter, noise cancellation module and processing module.This fingerprint sensor, this sampling hold circuit, this data converter and this noise cancellation module connect successively.This processing module connects this fingerprint sensor, this sampling hold circuit, this data converter and this noise cancellation module.This fingerprint sensor is used for scanning fingerprint and exports multiple fingerprint signal according to this fingerprint.This sampling hold circuit is used for exporting the plurality of fingerprint signal to this data converter at two or more different passages respectively.This processing module is for judging whether this fingerprint sensor carries out finger scan, if not, this processing module is for detecting and storing the noise signal of this fingerprint sensor, if, this processing module is used for, respectively according to two or more sequential, control this sampling hold circuit and export the plurality of fingerprint signal to this data converter at two or more different passages respectively.This noise cancellation module carries out noise elimination for utilizing this noise signal to the plurality of fingerprint signal through this data converter process.
In one embodiment, this electronic installation also comprises first memory and second memory, this first memory and this second memory all connect this processing module, this first memory is for storing this noise signal, this second memory be connected with this noise cancellation module and for store noise eliminate after the plurality of fingerprint signal, this processing module also for output noise eliminate after the plurality of fingerprint signal.
In one embodiment, this processing module is used for, respectively according to the first sequential, the second sequential and the 3rd sequential, control this sampling hold circuit by the plurality of fingerprint signal respectively at first passage, export this data converter at second channel and at third channel, this first sequential and this second sequential are different sequential with the 3rd sequential, and this first passage and this second channel are different passage with this third channel.
In one embodiment, this processing module is also for carrying out filtering process to the plurality of fingerprint signal after noise elimination.
In one embodiment, this fingerprint sensor comprises multiple sensing unit, and this sampling hold circuit comprises multiple sampling and keeps module and multiple switch, and each switch is connected to each sampling and keeps between module and this data converter.Each sensing unit is for exporting a fingerprint signal, each sampling keeps module for receiving this fingerprint signal keeping the sensing unit of model calling to export with this sampling, this processing module is used for, sequential two or more according to this respectively, controls the closed of the plurality of switch and disconnects.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the process flow diagram of the data processing method for fingerprint sensor of better embodiment of the present invention;
Fig. 2 is the structural representation of the fingerprint sensor of the data processing method process of better embodiment of the present invention;
Fig. 3 is the module diagram of the electronic installation of better embodiment of the present invention;
Fig. 4 is the part-structure schematic diagram of the electronic installation of better embodiment of the present invention; And
Fig. 5 is the electronic installation of better embodiment of the present invention Control timing sequence figure used.
Embodiment
Be described below in detail embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more described features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrically connected or can intercom mutually; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Disclosing hereafter provides many different embodiments or example is used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can in different example repeat reference numerals and/or reference letter, this repetition is to simplify and clearly object, itself does not indicate discussed various embodiment and/or relation between setting.In addition, the various specific technique that the invention provides and the example of material, but those of ordinary skill in the art can recognize the application of other techniques and/or the use of other materials.
Refer to Fig. 1, the data processing method for fingerprint sensor of better embodiment of the present invention comprises the following steps:
S11: judge whether this fingerprint sensor carries out finger scan, if not, enters step S12, if so, enters step S13;
S12: detect and store the noise signal of this fingerprint sensor;
S13: receive multiple fingerprint signals that this fingerprint sensor exports;
S14: respectively according to two or more sequential, exports the plurality of fingerprint signal to data converter at two or more different passages respectively;
S15: utilize this noise signal to carry out noise elimination to the plurality of fingerprint signal through this data converter process.
In step s 11, incorporated by reference to Fig. 2, the fingerprint sensor 200 used by present embodiment comprises frame 202 and by the two-dimensional detection array 206 of multiple sensing unit 204 by rearranging.
This frame 202 is looped around this two-dimensional detection array 206 around, and provides collection signal (such as AC signal) when finger scan to finger (not shown).Such as, frame 202 can be connected with emitting electrode to export this collection signal.
Each sensing unit 204 completes the collection of the single pixel to fingerprint image.Such as, the size of each sensing unit 204 is generally about 50um*50um.The size of the electric capacity formed between sensing unit 204 and finger just represents the crestal line of fingerprint or the feature of valley line, so multiple finger capacitance that all sensing units 204 of detection arrays 206 and finger are formed just represent the ridge paddy feature of fingerprint image.
During scanning fingerprint, transmit collection signal by frame 202 to finger and export multiple fingerprint signal to make fingerprint sensor 200.This collection signal can be AC signal, as the AC signal of sine wave, square wave or triangular wave.This fingerprint signal can be the voltage signal produced according to this finger capacitance.Sensing unit 204 correspondence exports a fingerprint signal.
Therefore, in one embodiment, by judging whether to launch collection signal to judge whether fingerprint sensor 200 is carrying out finger scan.
For fingerprint sensor 200, when carrying out fingerprint detection, except fingerprint signal, also there is multiple noise signal (comprising interference and error), noise signal significantly can reduce the accuracy of detection of fingerprint, so the restraint speckle signal that must take effective measure to.Therefore in step s 12, when fingerprint sensor 200 does not carry out finger scan, first detect and store the noise signal of fingerprint sensor 200, for the noise signal eliminating fingerprint sensor 200 below provides data, make data handling procedure succinctly efficient.
In step S14, incorporated by reference to Fig. 3 and Fig. 4, multiple fingerprint signals that fingerprint sensor 200 exports arrive sampling hold circuit 208, and the output terminal of sampling hold circuit 208 is connected to data converter 210.In present embodiment, multiple fingerprint signal exports data converter 210 with 3 different transmission channel A, B, C (calling first passage A, second channel B and third channel C in the following text) to from sampling hold circuit 208.Accordingly, data converter 210 comprises three receiving ports A1, A2, A3 and three selector switch (not shown), each receiving port is connected with corresponding transmission channel and selector switch, as shown in Figure 4, receiving port A1 connects first passage A and first selector switch, receiving port A2 connects second channel B and second selector switch, and receiving port A3 connects third channel C and the 3rd selector switch.Other circuit of output terminal connection data converter 210 inside of three selector switch.Other circuit of data converter 210 inside owing to not relating to the present invention, therefore launches no longer in detail at this.
Incorporated by reference to Fig. 5, the plurality of fingerprint signal can export data converter 210 to respectively according to three different sequential T1, T2, T3 (calling the first sequential T1, the second sequential T2 and the 3rd sequential T3 in the following text).In example as shown in Figure 5, for each sequential, the Time Created when Time Created of data is single-channel data transfers 5 times of Tsetup, therefore, the data processing method of present embodiment considerably increases available data transmission period, significantly reduces the power consumption problems of too of requirement to signaling rate and fingerprint sensor 200.3rd selector switch closes and the sequential that disconnects can be identical with the 3rd sequential T3, and second selector switch closes and the sequential that disconnects can be identical with the second sequential T2, and first selector switch closes and the sequential that disconnects can be identical with the first sequential T1.
Particularly, this sampling hold circuit 208 comprise multiple sampling keep module shn and multiple switch S n (n=0 in present embodiment, 1,2 ..., 19), each switch S n is connected to each sampling and keeps between module shn and this data converter 210.Can module shn and multiple switch S be kept to be divided into multiple control combination multiple sampling, such as 3 control combinations, first control combination comprises the maintenance module sh0 that samples, switch S 0, the maintenance module sh3 that samples, switch S 3, the maintenance module sh6 that samples, switch S 6, the maintenance module sh9 that samples, switch S 9, the maintenance module sh12 that samples, switch S 12, the maintenance module sh15 that samples, switch S 15, sample maintenance module sh18 and switch S 18.Second control combination comprises the maintenance module sh1 that samples, switch S 1, the maintenance module sh4 that samples, switch S 4, the maintenance module sh7 that samples, switch S 7, the maintenance module sh10 that samples, switch S 10, the maintenance module sh13 that samples, switch S 13, the maintenance module sh16 that samples, switch S 16, sample maintenance module sh19 and switch S 19.3rd control combination comprises the maintenance module sh2 that samples, switch S 2, the maintenance module sh5 that samples, switch S 5, the maintenance module sh8 that samples, switch S 8, the maintenance module sh11 that samples, switch S 11, the maintenance module sh14 that samples, switch S 14, sample maintenance module sh17 and switch S 17.
First sequential T1 is the switching sequence of switch S 0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18, as, high level represents that switch S 0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18 closes, and low level represents that switch S 0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18 disconnect.
When switch S 0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18 close, sampling keeps module sh0, sh3, sh6, sh9, sh12, sh15, sh18 can keep the fingerprint signal in module sh0, sh3, sh6, sh9, sh12, sh15, sh18 to export data converter 210 to through first passage A by being temporarily stored in sampling.
Second sequential T2 is the switching sequence of switch S 1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19, as, high level represents that switch S 1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19 closes, and low level represents that switch S 1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19 disconnect.
When switch S 1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19 close, sampling keeps module sh1, sh4, sh7, sh10, sh13, sh16, sh19 can keep the fingerprint signal in module sh1, sh4, sh7, sh10, sh13, sh16, sh19 to export data converter 210 to through second channel B by being temporarily stored in sampling.
3rd sequential T3 is the switching sequence of switch S 2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17, as, high level represents that switch S 2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17 closes, and low level represents that switch S 2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17 disconnect.
When switch S 2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17 close, sampling keeps module sh2, sh5, sh8, sh11, sh14 and sh17 can keep the fingerprint signal in module sh2, sh5, sh8, sh11, sh14 and sh17 to export data converter 210 to through third channel C by being temporarily stored in sampling.Therefore, multiple fingerprint signal outputs to data converter 210 by multiplex channel A, B, C.
In step S15, noise elimination is carried out to the plurality of fingerprint signal through the process of this data converter 210, and then improves the accuracy of detection of fingerprint.
In the present embodiment, this data processing method also comprises step S16: store or output noise eliminate after the plurality of fingerprint signal.Therefore, data processing method noise can be eliminated after the plurality of fingerprint signal carry out storing and processing At All Other Times for subsequent conditioning circuit, or the plurality of fingerprint signal after direct output noise elimination processes to subsequent conditioning circuit, improves the dirigibility of data processing.
In the present embodiment, this data processing method also comprises step S17: the plurality of fingerprint signal after eliminating noise carries out filtering process.Fingerprint signal is still including a part of surplus noise after the noise elimination stage, and therefore, this data processing method carries out filtering process again to these surplus noises, the further accuracy of detection improving fingerprint.
In sum, above-mentioned data processing method, to the process of fingerprint sensor 200 noise, adopts and detects noise and fingerprint signal timesharing, stored by noise, eliminated by noise, improve the accuracy of detection of fingerprint signal when pending fingerprint signal detects; And for the fingerprint signal that fingerprint sensor 200 exports, adopt the mode of multichannel time-sharing multiplex to export, thus increase available data transmission period, significantly reduce the requirement to signaling rate and fingerprint sensor 200 power consumption problems of too.
Please refer to the drawing 3, the electronic installation 100 of better embodiment of the present invention comprises fingerprint sensor 200, sampling hold circuit 208, data converter 210, noise cancellation module 212 and processing module 214.Data converter 210 is analog to digital converter (ADC).This fingerprint sensor 200, this sampling hold circuit 208, this data converter 210 and this noise cancellation module 212 connect successively, and this processing module 214 connects this fingerprint sensor 200, this sampling hold circuit 208, this data converter 210 and this noise cancellation module 212.This electronic installation 100 is such as the electronic installation of mobile phone, panel computer, notebook computer, Intelligent worn device, audio player or video player etc.
This fingerprint sensor 200 is for scanning fingerprint and export multiple fingerprint signal according to this fingerprint.Incorporated by reference to Fig. 2, fingerprint sensor 200 comprises frame 202 and by the two-dimensional detection array 206 of multiple sensing unit 204 by rearranging.
This frame 202 is looped around this two-dimensional detection array 206 around, and provides collection signal (such as AC signal) when finger scan to finger (not shown).Such as, frame 202 can be connected with emitting electrode to export this collection signal.
Each sensing unit 204 completes the collection of the single pixel to fingerprint image.Such as, the size of each sensing unit 204 is generally about 50um*50um.The size of the electric capacity formed between sensing unit 204 and finger just represents the crestal line of fingerprint or the feature of valley line, so multiple finger capacitance that all sensing units 204 of detection arrays 206 and finger are formed just represent the ridge paddy feature of fingerprint image.
During scanning fingerprint, transmit collection signal by frame 202 to finger and export multiple fingerprint signal to make fingerprint sensor 200.This collection signal can be AC signal, as the AC signal of sine wave, square wave or triangular wave.This fingerprint signal can be the voltage signal produced according to this finger capacitance.Sensing unit 204 correspondence exports a fingerprint signal.
This sampling hold circuit 208 is for exporting the plurality of fingerprint signal to this data converter 210 at two or more different passages respectively.
In present embodiment, this sampling hold circuit 208 comprises multiple sampling and keeps module shn and multiple switch S n (in present embodiment, n=0,1,2 ..., 19), each switch S is connected to each sampling and keeps between module shn and this data converter 210.The fingerprint signal that each sampling keeps module shn to export for receiving the sensing unit 204 that keeps module shn to be connected with this sampling.By the closed of gauge tap S or disconnection, and make corresponding fingerprint signal export data converter 210 to, or do not export data converter 210 to.
This processing module 214 is for judging whether this fingerprint sensor 200 carries out finger scan.Such as, processing module 214 is by judging whether to launch collection signal to judge whether fingerprint sensor 200 is carrying out finger scan.
If not, this processing module 214 is for detecting and storing the noise signal of this fingerprint sensor 200.For fingerprint sensor 200, when carrying out fingerprint detection, except fingerprint signal, also there is multiple noise signal (comprising interference and error), noise signal significantly can reduce the precision of detection system, so the restraint speckle signal that must take effective measure to.Therefore, the error produced in " fingerprint detector 200 → sampling hold circuit 208 → data converter 210 " process and undesired signal will first be detected and store.Therefore processing module 214, when fingerprint sensor 200 does not carry out finger scan, first detects and stores above-mentioned noise signal, for the noise signal eliminating fingerprint sensor 200 below provides data, makes data handling procedure succinctly efficient.Electronic installation 100 also comprises first memory 216, and first memory 216 is connected with processing module 214.Noise signal can be stored in first memory 216 by processing module 214.
If so, this processing module 214 for, respectively according to two or more sequential, control this sampling hold circuit 208 and export the plurality of fingerprint signal to this data converter 210 at two or more different passages respectively.
Particularly, incorporated by reference to Fig. 4, in the present embodiment, multiple fingerprint signal inputs to data converter 210 with 3 different transmission channel A, B, C (calling first passage A, second channel B and third channel C in the following text) from sampling hold circuit 208.Accordingly, data converter 210 comprises three receiver modules A1, A2, A3, and each receiver module connects with corresponding transmission channel, and as receiver module A1 connects first passage A, receiver module A2 connects second channel B, and receiver module A3 connects third channel C.
Incorporated by reference to Fig. 5, the plurality of fingerprint signal can export data converter 210 to according to three different sequential T1, T2, T3 (calling the first sequential T1, the second sequential T2 and the 3rd sequential T3 in the following text) respectively.In example as shown in Figure 5, for each sequential, the Time Created when Time Created of data is single-channel data transfers 5 times of Tsetup, therefore, the electronic installation 100 of present embodiment considerably increases available data transmission period, significantly reduces and consumes problems of too to the requirement of signaling rate and fingerprint sensor merit 200.
Particularly, multiple sampling can keep module shn and multiple switch S n to be divided into multiple control combination by processing module 214, such as 3 control combinations, first control combination comprises the maintenance module sh0 that samples, switch S 0, the maintenance module sh3 that samples, switch S 3, the maintenance module sh6 that samples, switch S 6, the maintenance module sh9 that samples, switch S 9, the maintenance module sh12 that samples, switch S 12, the maintenance module sh15 that samples, switch S 15, sample maintenance module sh18 and switch S 18.Second control combination comprises the maintenance module sh1 that samples, switch S 1, the maintenance module sh4 that samples, switch S 4, the maintenance module sh7 that samples, switch S 7, the maintenance module sh10 that samples, switch S 10, the maintenance module sh13 that samples, switch S 13, the maintenance module sh16 that samples, switch S 16, sample maintenance module sh19 and switch S 19.3rd control combination comprises the maintenance module sh2 that samples, switch S 2, the maintenance module sh5 that samples, switch S 5, the maintenance module sh8 that samples, switch S 8, the maintenance module sh11 that samples, switch S 11, the maintenance module sh14 that samples, switch S 14, sample maintenance module sh17 and switch S 17.
First sequential T1 is the switching sequence of switch S 0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18, as, high level represents that switch S 0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18 closes, and low level represents that switch S 0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18 disconnect.Processing module 214 is according to the closed of the first sequential T1 gauge tap S0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18 and disconnect.
When processing module 214 closes according to the first sequential T1 gauge tap S0, switch S 3, switch S 6, switch S 9, switch S 12, switch S 15 and switch S 18, sampling keeps module sh0, sh3, sh6, sh9, sh12, sh15, sh18 can keep the fingerprint signal in module sh0, sh3, sh6, sh9, sh12, sh15, sh18 to export data converter 210 to through first passage A by being temporarily stored in sampling.
Second sequential T2 is the switching sequence of switch S 1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19, as, high level represents that switch S 1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19 closes, and low level represents that switch S 1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19 disconnect.Processing module 214 is according to the closed of the second sequential T2 gauge tap S1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19 and disconnect.
When processing module 214 closes according to the second sequential T2 gauge tap S1, switch S 4, switch S 7, switch S 10, switch S 13, switch S 16 and switch S 19, sampling keeps module sh1, sh4, sh7, sh10, sh13, sh16, sh19 can keep the fingerprint signal in module sh1, sh4, sh7, sh10, sh13, sh16, sh19 to export data converter 210 to through second channel B by being temporarily stored in sampling.
3rd sequential T3 is the switching sequence of switch S 2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17, as, high level represents that switch S 2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17 closes, and low level represents that switch S 2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17 disconnect.Processing module 214 is according to the closed of the 3rd sequential T3 gauge tap S2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17 and disconnect.
When processing module 214 closes according to the 3rd sequential T3 gauge tap S2, switch S 5, switch S 8, switch S 11, switch S 14 and switch S 17, sampling keeps module sh2, sh5, sh8, sh11, sh14 and sh17 can keep the fingerprint signal in module sh2, sh5, sh8, sh11, sh14 and sh17 to export data converter 210 to through third channel C by being temporarily stored in sampling.Therefore, processing module 214 exports multiple fingerprint signal to data converter 210 by multiplex channel A, B, C.
This noise cancellation module 212 carries out noise elimination for utilizing this noise signal to the plurality of fingerprint signal through the process of this data converter 210, and then improves the accuracy of detection of fingerprint.
In one embodiment, electronic installation 100 also comprises second memory 218.Second memory 218 is connected with this noise cancellation module 212 and processing module 214.Second memory 218 is for storing the plurality of fingerprint signal after noise elimination.Processing module 214 is also for the plurality of fingerprint signal after output noise elimination.Therefore, this electronic installation 100 can improve the dirigibility of data processing.
In one embodiment, this processing module 214 is also for carrying out filtering process to the plurality of fingerprint signal after noise elimination.This electronic installation 100 can carry out filtering process again to surplus noise, the further accuracy of detection improving fingerprint.Multiple fingerprint signals after filtering process also can be stored in second memory 218.Be appreciated that first memory 216 and second memory 218 can be the different memory locations of same memory storage, or different memory storages.
In sum, above-mentioned electronic installation 100, to the process of fingerprint sensor 200 noise, adopts and detects noise and fingerprint signal timesharing, stored by noise, eliminated by noise, improve the accuracy of detection of fingerprint signal when pending fingerprint signal detects; And for the fingerprint signal that fingerprint sensor 200 exports, adopt the mode of multichannel time-sharing multiplex to export, thus increase available data transmission period, significantly reduce and problems of too is consumed to the requirement of signaling rate and fingerprint sensor merit 200.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " exemplary embodiment ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with described embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
Describe and can be understood in process flow diagram or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this instructions, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), ROM (read-only memory) (ROM), erasablely edit ROM (read-only memory) (EPROM or flash memory), fiber device, and portable optic disk ROM (read-only memory) (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanning to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer memory.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (9)
1. for a data processing method for fingerprint sensor, it is characterized in that, comprise the following steps:
S11: judge whether this fingerprint sensor carries out finger scan, if not, enters step S12, if so, enters step S13;
S12: detect and store the noise signal of this fingerprint sensor;
S13: receive multiple fingerprint signals that this fingerprint sensor exports;
S14: respectively according to two or more sequential, exports the plurality of fingerprint signal to data converter at two or more different passages respectively;
S15: utilize this noise signal to carry out noise elimination to the plurality of fingerprint signal through this data converter process.
2. data processing method as claimed in claim 1, it is characterized in that, this data processing method also comprises step S16: store or output noise eliminate after the plurality of fingerprint signal.
3. data processing method as claimed in claim 1, it is characterized in that, in step S14, respectively according to the first sequential, the second sequential and the 3rd sequential, by the plurality of fingerprint signal respectively at first passage, export this data converter at second channel and at third channel, this first sequential and this second sequential are different sequential with the 3rd sequential, and this first passage and this second channel are different passage with this third channel.
4. data processing method as claimed in claim 1, it is characterized in that, this data processing method also comprises step S17: the plurality of fingerprint signal after eliminating noise carries out filtering process.
5. an electronic installation, it is characterized in that, comprise fingerprint sensor, sampling hold circuit, data converter, noise cancellation module and processing module, this fingerprint sensor, this sampling hold circuit, this data converter and this noise cancellation module connect successively, and this processing module connects this fingerprint sensor, this sampling hold circuit, this data converter and this noise cancellation module;
This fingerprint sensor is used for scanning fingerprint and exports multiple fingerprint signal according to this fingerprint;
This sampling hold circuit is used for exporting the plurality of fingerprint signal to this data converter at two or more different passages respectively;
This processing module is for judging whether this fingerprint sensor carries out finger scan, if not, this processing module is for detecting and storing the noise signal of this fingerprint sensor, if, this processing module is used for, respectively according to two or more sequential, control this sampling hold circuit and export the plurality of fingerprint signal to this data converter at two or more different passages respectively; And
This noise cancellation module carries out noise elimination for utilizing this noise signal to the plurality of fingerprint signal through this data converter process.
6. electronic installation as claimed in claim 5, it is characterized in that, this electronic installation also comprises first memory and second memory, this first memory and this second memory all connect this processing module, this first memory is for storing this noise signal, this second memory be connected with this noise cancellation module and for store noise eliminate after the plurality of fingerprint signal, this processing module also for output noise eliminate after the plurality of fingerprint signal.
7. electronic installation as claimed in claim 5, it is characterized in that, this processing module is used for, respectively according to the first sequential, the second sequential and the 3rd sequential, control this sampling hold circuit by the plurality of fingerprint signal respectively at first passage, export this data converter at second channel and at third channel, this first sequential and this second sequential are different sequential with the 3rd sequential, and this first passage and this second channel are different passage with this third channel.
8. electronic installation as claimed in claim 5, is characterized in that, this processing module is also for carrying out filtering process to the plurality of fingerprint signal after noise elimination.
9. electronic installation as claimed in claim 5, it is characterized in that, this fingerprint sensor comprises multiple sensing unit, and this sampling hold circuit comprises multiple sampling and keeps module and multiple switch, and each switch is connected to each sampling and keeps between module and this data converter;
Each sensing unit is for exporting a fingerprint signal, each sampling keeps module for receiving this fingerprint signal keeping the sensing unit of model calling to export with this sampling, this processing module is used for, sequential two or more according to this respectively, controls the closed of the plurality of switch and disconnects.
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| CN201510082225.0A CN105205440A (en) | 2015-02-13 | 2015-02-13 | Data processing method for fingerprint sensor and electronic device |
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