CN106599822B - A kind of the fingerprint collecting unit array and its acquisition method of variable-resolution - Google Patents
A kind of the fingerprint collecting unit array and its acquisition method of variable-resolution Download PDFInfo
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- CN106599822B CN106599822B CN201611120944.8A CN201611120944A CN106599822B CN 106599822 B CN106599822 B CN 106599822B CN 201611120944 A CN201611120944 A CN 201611120944A CN 106599822 B CN106599822 B CN 106599822B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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Abstract
The invention discloses a kind of fingerprint collecting unit arrays of variable-resolution, metal polar plate including fingerprint collecting array, 4 × 4 500ppi fingerprint collecting array is provided on the metal polar plate of the fingerprint collecting array, the 500ppi fingerprint collecting array includes the acquisition pixel of four 500ppi resolution ratio, and the acquisition pixel of each 500ppi resolution ratio includes four unit pixel points.Through the above way, the fingerprint collecting unit array and its acquisition method of variable-resolution of the invention, by the segmentation and gating processing to pole plate, the fingerprint collecting mode of resolution changable may be implemented, for different fingerprint collecting resolution requirements, it can be realized using an acquisition principle or chip, in the application for needing In vivo detection, it is adapted to high-resolution demand, is not needing high-resolution occasion, low resolution can be used, imaging quality is promoted.
Description
Technical field
The invention belongs to semiconductor fingerprint acquisition technique fields, are related to a kind of fingerprint collecting unit more particularly to a kind of tool
There are the array of acquisition units and its acquisition method of variable-resolution.
Background technique
With the development of science and technology people are more more and more intense to the awareness of safety of self information, as Iphone5S releases band
The finger of fingerprint recognition allows it is seen that the technology bring convenience of fingerprint recognition.From technical maturity, fingerprint is
Most mature identity recognizing technology now, fingerprint identification technology has been generally acknowledged cheap, Miniaturizable, can scale of mass production
A kind of biological identification technology.Biological identification technology is different from the identification technology of traditional password and key, he has uniqueness, no
It is the advantages that good duplication, high discrimination, low misclassification rate, inevitable to replace traditional identity identifying technology in a certain range.
There are two types of the present mainstreams of fingerprint identification technology.One is optical fingerprint identification technologies, and one is semiconductor fingerprints
Identification technology.For fingerprint identification technology between past 20 years, two kinds of technologies have respective application, but as movement is set
Standby rise, optical profile type can not minimize and the shortcomings that scale is more and more prominent.Present mobile phone market, mainstream are partly to lead
The fingerprint collecting equipment of body formula still occupies very big market in traditional hardware, field of lockset optical head.But with partly leading
The reduction of the cost of body finger sensor apparatus, it is higher and higher that the city of semiconductor transducer accounts for rate.
With the maturation in market and the fierceness of competition, to semiconductor living body authentication and prevent the requirement of prosthetic finger increasingly bright
Aobvious, to realize such target, technically there are two types of trend now: one is compound authentication modes, exactly recognize in conjunction with minimum two kinds
Card mode, for example heart rate and finger print information or electrocardiogram or finger print information are combined, it acquires, authenticates simultaneously simultaneously；Second
It is the resolution ratio for improving fingerprint sensor, extracts pore to realize living body authentication.Occur on the market with shining in semiconductor
Semiconductor fingerprint acquisition technique based on diode, realizes the resolution ratio of 2000ppi or more, such as patent
The fingerprint sensing of 2000ppi a kind of is referred in CN201410763587.1 " fingerprint In vivo detection and recognition methods and device "
Device, and liveliness detection is realized using such fingerprint sensor, prevent prosthetic finger from authenticating.
But in practical applications, the fingerprint sensor data volume of 2000ppi is too big, is 4 times of conventional 500ppi or more,
And the resolution ratio of 2000ppi is not needed in many applied fields.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of fingerprint collecting unit arrays of variable-resolution, use
The mode of variable-resolution acquisition realizes the free switchings of a variety of resolution ratio.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: provide a kind of variable-resolution
Fingerprint collecting unit array, the metal polar plate including fingerprint collecting array are arranged on the metal polar plate of the fingerprint collecting array
There is 4 × 4 500ppi fingerprint collecting array, the 500ppi fingerprint collecting array includes the acquisition picture of four 500ppi resolution ratio
Vegetarian refreshments, the acquisition pixel of each 500ppi resolution ratio include four unit pixel points.
In a preferred embodiment of the present invention, the unit pixel point is fingerprint sensor, is differentiated using 2000ppi
The fingerprint collecting unit of rate.
In a preferred embodiment of the present invention, the distance between each described unit pixel point is 3-5um.
In a preferred embodiment of the present invention, the specification size of each unit pixel point is equal, each adjacent
The distance between described unit pixel point is equal.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: provide a kind of variable-resolution
The acquisition method of fingerprint collecting unit array, the unit pixel point pass through the switch and Acquisition Circuit phase of sensor plate respectively
Connection carries out signal acquisition.
In a preferred embodiment of the present invention, one is additionally provided between the switch and Acquisition Circuit of the sensor plate
Master switch
The beneficial effects of the present invention are: the fingerprint collecting unit array and its acquisition method of variable-resolution of the invention,
By the segmentation and gating processing to pole plate, the fingerprint collecting mode of resolution changable may be implemented, adopted for different fingerprints
Collect resolution requirement, can be realized using an acquisition principle or chip, it, can be in the application for needing In vivo detection
High-resolution demand is adapted to, high-resolution occasion is not being needed, low resolution can be used, promote imaging quality.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, in which:
Fig. 1 is the structural schematic diagram of the fingerprint collecting unit array of variable-resolution in the present invention；
Fig. 2 is actual collecting sensor signal figure；
Timing diagram when Fig. 3 is 2000ppi acquisition；
Timing diagram when Fig. 4 is 500ppi acquisition；
Fig. 5 is another embodiment.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
As shown in Figure 1, the embodiment of the present invention includes:
A kind of fingerprint collecting unit array of variable-resolution, the metal polar plate including fingerprint collecting array, the fingerprint
4 × 4 500ppi fingerprint collecting array is provided on the metal polar plate of acquisition array, (practical array in the application may also
For any other size, such as 96X96,112X96,208X288 etc.), the 500ppi fingerprint collecting array includes four
The acquisition pixel of 500ppi resolution ratio, the acquisition pixel of each 500ppi resolution ratio include four unit pixels
Point.
Among the above, the unit pixel point is fingerprint sensor, using the fingerprint collecting unit of 2000ppi resolution ratio.
As shown in Figure 1,101,102,103,104 respectively constitute the pixel of 500ppi acquisition, wherein 101 by 11,
12,13,14 compositions.11,12,13,14 be the unit pixel point of 2000ppi resolution ratio fingerprint collecting.11,12,13,14 unit
Pixel constitutes 101.It indicates that 21,22,23,24 unit pixel point constitutes 102 in Fig. 1, indicates 31,32,33,34
Unit pixel point constitutes 103, indicates that 41,42,43,44 unit pixel point constitutes 104.The wherein spacing between pixel
According to technique difference, about 3um-5um, in actual design, may not in this range, but be included in this patent it
In.
Wherein, the specification size of each unit pixel point is equal, between each adjacent unit pixel point
Distance is equal.
The present invention also provides a kind of acquisition method of the fingerprint collecting unit array of variable-resolution, the unit pixels
Point is connected by the switch of sensor plate with Acquisition Circuit respectively, carries out signal acquisition.Wherein, the sensor plate
A master switch is additionally provided between switch and Acquisition Circuit.
Embodiment:
In order to realize that resolution ratio can configure, as shown in Fig. 2, the signal of i.e. each signal pole plate must acquire and defeated
Out.In Fig. 2,200 be the fingerprint collecting pixel of a 500ppi resolution ratio, and 200 are constituted by 201,202,203,204,
In 201,202,203,204 respectively indicate a 200ppi resolution ratio fingerprint collecting unit perspective view.In actual design,
Generally require 201,202,203,204 size all, i.e., 201, corresponding to 202,203,204 205 expressions W(wide),
L(long represented by 206) want equal.Spacing (i.e. 207 D1 indicated) and 203 between the 13 of 203 11 and 204 expressions indicated
Spacing (i.e. 208 D2 indicated) between the 14 of 13 and 204 expressions indicated is equal.The H of 215 expressions is the gold of fingerprint sensor
Belong to plate thickness, this is related with specific semiconductor fabrication process, and general thickness 0.6um-5um does not limit in practical applications
In the value of this range.
209 be switch S1 in Fig. 2, and 210 be switch S2, and 211 be switch S3, and 212 be switch S4, and 215 be switch S5.When
When acquiring image as 2000ppi, switch S5 is closed always, and the connection of corresponding 203 and 213 signal processing circuits of switch S1 is opened
Close the connection of corresponding 201 and 213 signal processing circuits of S2, the connection of corresponding 204 and 213 signal processing circuits of switch S3, switch
The connection of corresponding 202 and 213 signal processing circuits of S4.As switch S1, S2, S3, S4 connection, corresponding pole plate unit is acquired
The fingerprint sensor acquisition of 2000ppi resolution ratio, output signal 214 may be implemented in signal.In the feelings of 500ppi image resolution ratio
Under condition, switch S1, S2, S3 are needed, S4 opens to realize acquisition simultaneously, it is processed into a pole plate 201,202,203,204, into
Row signal acquisition realizes the acquisition of 500ppi by control S5.
Fig. 3 is the timing diagram of 2000ppi acquisition, and 300 T1 indicated represent a collection period of 4 pixel,
In acquisition, four pixels 201,202,203,204 can be regarded as a block of pixels (BLOCK), in the way of BLOCK
Acquisition.Assuming that high level opens switch, low level is turned off the switch.302 waveforms indicate the control signal of switch S1,303 waveform tables
Show that the control signal of switch S2,304 waveforms indicate that switch S3 controls signal, 305 indicate that switch S4 controls signal, 306 waveform tables
Show that switch S5 controls signal.When realizing 2000ppi acquisition, switch S5 is constantly in open state, switch S1, S2, S3, and S4 divides
Not in S1_ON, S2_ON, S3_ON, the S4_ON period is opened, from figure 3, it can be seen that switch S1, S2, S3, S4 are successively to open
, and it is non-overlapping.301 T2 indicated are the time cycle of signal processing, and this period can be 0, can also be according to reality
The design on border adjusts.
Timing diagram when Fig. 4 is as 500ppi acquisition, 400 T11 indicate that a collection period, 402 S1_ON1 indicate
The switch control time sequence of S1,403 S2_ON1 indicate the switch control time sequence of S2, when 404 S3_ON1 indicate the switch control of S3
Sequence, 405 S4_ON1 indicate the switch control time sequence of S4, and 401 indicate the switch control time sequence of S5.Wherein S1_ON1, S2_ON1,
S3_ON1, S4_ON1 are constantly in open state, S5_ON1 is only in acquisition pixel Shi Caiyou when 500ppi is acquired
Effect becomes low level after the completion of acquisition, makes to acquire pole plate and Acquisition Circuit disconnects.
Fig. 5 is another embodiment of this patent, one acquisition of configuration below the pole plate of each 2000ppi pixel
Circuit is respectively acquired a point.501,502,503,504 indicate switch S6, S7, S8, S9.505 indicate the letter of 203 pole plates
Number processing circuit, 506 indicate 201 processing circuit, and 507 indicate 202 processing circuit, and 508 indicate 204 processing circuit, 509
Indicate 505 output, 510 indicate 506 output, and 511 indicate 507 output, and 512 indicate 508 output.Switch S6, S7,
S8, S9 are opened in acquisition simultaneously, while output data exports 4 data when acquiring finger print data as 2000ppi, point
Other places reason calculates average value to 4 data of output when acquiring finger print data as 500ppi, available 500ppi's
Data.For this embodiment when realizing 500ppi acquisition and 2000ppi acquisition, timing is identical, only to the processing mode of data
It is different.
Cited 2000dpi dividing method is one kind of the embodiment of this patent, the mode of this patent in the application
The fingerprint collecting of higher resolution can also be realized, more resolutions by the way that acquisition pole plate is divided into more acquisition units
Rate optional way, such as 4000dpi or lower 300dpi.
The fingerprint collecting unit array and its acquisition method of the variable-resolution of invention have as follows compared with prior art
Advantage:
1. by the way that a low resolution region segmentation at 4 or more sensor pickup area, is realized height point
The switching of resolution；
2. high-resolution or low resolution can by four or with mostly with the switch of sensor plate and acquisition electricity
Road is connected, and realizes signal acquisition；
3. high-resolution circuit can be multiplexed with the Acquisition Circuit of low resolution, signal acquisition is realized；
4. can be adopted for a sensor built in each high-resolution sensor when realizing high-resolution acquisition
Collector；
5. sensor timing can use repeating query mode when realizing high-resolution acquisition.
In conclusion the fingerprint collecting unit array and its acquisition method of variable-resolution of the invention, by pole plate
Segmentation and gating processing, the fingerprint collecting mode of resolution changable may be implemented, wanted for different fingerprint collecting resolution ratio
It asks, can be realized using an acquisition principle or chip, in the application for needing In vivo detection, be adapted to high-resolution
The demand of rate is not needing high-resolution occasion, can use low resolution, promote imaging quality.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (3)
1. a kind of fingerprint collecting unit array of variable-resolution, which is characterized in that the metal polar plate including fingerprint collecting array,
4 × 4 500ppi fingerprint collecting array, the 500ppi fingerprint collecting are provided on the metal polar plate of the fingerprint collecting array
Array includes the acquisition pixel of four 500ppi resolution ratio, and the acquisition pixel of each 500ppi resolution ratio includes four
A unit pixel point, the acquisition method of the fingerprint collecting unit array of the variable-resolution are as follows: the unit pixel point difference
Be connected by the switch of sensor plate with Acquisition Circuit, carry out signal acquisition, wherein the switch of the sensor plate with
A master switch is additionally provided between Acquisition Circuit；
Among the above, the unit pixel point is fingerprint sensor, using the fingerprint sensor of 2000ppi resolution ratio.
2. the fingerprint collecting unit array of variable-resolution according to claim 1, which is characterized in that each unit
The distance between pixel is 3-5um.
3. the fingerprint collecting unit array of variable-resolution according to claim 1, which is characterized in that each unit
The specification size of pixel is equal, and the distance between each adjacent described unit pixel point is equal.
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| CN201611120944.8A CN106599822B (en) | 2016-12-08 | 2016-12-08 | A kind of the fingerprint collecting unit array and its acquisition method of variable-resolution |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263511A (en) * | 2005-02-17 | 2008-09-10 | 奥森泰克公司 | Finger sensor apparatus using image resampling and associated methods |
| CN104021374A (en) * | 2014-05-28 | 2014-09-03 | 上海思立微电子科技有限公司 | Fingerprint sensor array |
| CN106203409A (en) * | 2016-09-08 | 2016-12-07 | 成都感芯科技有限公司 | A kind of fingerprint collecting framework |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9740343B2 (en) * | 2012-04-13 | 2017-08-22 | Apple Inc. | Capacitive sensing array modulation |
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- 2016-12-08 CN CN201611120944.8A patent/CN106599822B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263511A (en) * | 2005-02-17 | 2008-09-10 | 奥森泰克公司 | Finger sensor apparatus using image resampling and associated methods |
| CN104021374A (en) * | 2014-05-28 | 2014-09-03 | 上海思立微电子科技有限公司 | Fingerprint sensor array |
| CN106203409A (en) * | 2016-09-08 | 2016-12-07 | 成都感芯科技有限公司 | A kind of fingerprint collecting framework |
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