CN104050463B - Fingerprint recognition detection components and its electronic device - Google Patents
Fingerprint recognition detection components and its electronic device Download PDFInfo
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- CN104050463B CN104050463B CN201410313037.XA CN201410313037A CN104050463B CN 104050463 B CN104050463 B CN 104050463B CN 201410313037 A CN201410313037 A CN 201410313037A CN 104050463 B CN104050463 B CN 104050463B
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Abstract
Present invention is disclosed fingerprint recognition detection components and its electronic devices, wherein fingerprint recognition detection components include：Substrate, the side with the first face, the second face corresponding with first face and connection first face and the second face；Side lead is set to the side of the substrate；Fingerprint detection element is set to the first face of the substrate；First lead is set to the first face of the substrate, and one end of first lead is electrically connected the fingerprint detection element, and the other end connects the side lead；And second lead, it is set to the second face of the substrate, one end of second lead is electrically connected the side lead, the present invention may be implemented to realize fingerprint recognition on the electronic devices such as such as portable terminal, and it need not be by physical button, but fingerprint recognition is carried out on the non-display area transparent cover plate of such as display screen, the practical application of fingerprint recognition is extended, the Android mobile phone etc. of no entity HOME keys is particularly suitable for.
Description
Technical field
The present invention relates to fingerprint recognition field, especially a kind of fingerprint recognition detection components and with the fingerprint recognition inspection
Survey the electronic device of component.
Background technology
With the extensive use of portable terminal in people's daily life, the function of present portable terminal is increasingly
It is powerful, and this diversified function facilitates user.But portable terminal is providing the same of more conveniences to the user
When, too many personal information is carried, if this portable terminal is once losing or being stolen, these information are not due to having
Relevant protection is carried out, therefore is easy to let out, is made troubles to user.Therefore, some guarantors are on portable terminal
The setting of close aspect is very necessary.
The function of keeping secret of traditional portable terminal for having touch screen is setting such as keyboard on portable terminal nothing but
The software functions such as lock, and realize secrecy by inputting password.This traditional portable terminal for having touch screen, usual key
Disk lock is protrusively provided edge side in portable terminal in the form of button, thus user grab pinch portable terminal when or be not intended to
Between can press keypad lock, to drive portable terminal, consume the electricity of portable terminal.Also, due in portable terminal
Edge side be provided with keypad lock reduce the exterior quality of portable terminal to give unsmooth, irregular feeling.
Meanwhile when realizing secrecy, inputting password every time by inputting password, therefore seem cumbersome, and password holds
Easily being cracked causes function of keeping secret to fail.
Invention content
The purpose of the present invention is to provide a kind of fingerprint recognition detection components and with the fingerprint recognition detection components
Electronic device realizes fingerprint recognition on the electronic devices such as such as portable terminal.
According to an aspect of the present invention, a kind of fingerprint recognition detection components are provided, including：
Substrate has the first face, the second face corresponding with first face and connection first face and the second face
Side；
Side lead is set to the side of the substrate；
Fingerprint detection element is set to the first face of the substrate；
First lead, is set to the first face of the substrate, and one end of first lead is electrically connected the fingerprint detection
Element, the other end connect the side lead；And
Second lead, is set to the second face of the substrate, and one end of second lead is electrically connected the side lead；
Wherein, the fingerprint detection element includes：
First induction electrode；
A plurality of first driving electrodes, a plurality of first driving electrodes are arranged side by side and are separated from each other, and described a plurality of
One driving electrodes are opposite to form multiple first detector gaps at interval with first induction electrode respectively；
Second induction electrode, be arranged in parallel with first induction electrode and be located at first induction electrode with it is described
The opposite side of a plurality of first driving electrodes；
A plurality of second driving electrodes, a plurality of second driving electrodes are arranged side by side and are separated from each other, and described a plurality of
Two driving electrodes are opposite to form multiple second detector gaps at interval with second induction electrode respectively, and described a plurality of the
Two driving electrodes are arranged in correspondence with a plurality of first driving electrodes in second induction electrode and first induction
The opposite side of electrode.
Preferably, the fingerprint detection element further includes the first reference electrode and the second reference electrode, first reference
Electrode is parallelly oppositely arranged with first induction electrode and is driven positioned at first induction electrode and described a plurality of first
The opposite side of moving electrode, second reference electrode and second induction electrode are parallelly oppositely arranged and positioned at described the
The side opposite with a plurality of second driving electrodes of two induction electrodes.
Preferably, the fingerprint detection element further includes a plurality of first illusory driving electrodes and a plurality of second illusory driving electricity
Pole, a plurality of first illusory driving electrodes are arranged side by side and are electrically connected to each other, a plurality of first illusory driving electrodes and institute
A plurality of first driving electrodes are stated to be arranged in correspondence in the side opposite with first induction electrode of first reference electrode,
The a plurality of second illusory driving electrodes are arranged side by side and are electrically connected to each other, a plurality of second illusory driving electrodes with it is described more
The second driving electrodes of item are arranged in correspondence in the side opposite with second induction electrode of second reference electrode.
Preferably, the pitch between adjacent first driving electrodes and the pitch between adjacent second driving electrodes are equal to each other
And in 50 to 60 μ ms；The width of first driving electrodes and the width of the second driving electrodes are equal to each other and at 20 to 45 μm
In range；The size of first detector gap and the second detector gap is equal to each other and in 20 to 40 μ m.
Preferably, the side of the substrate is equipped with one or more groove, and the side lead is formed in the groove.
Preferably, pattern at least part that the induction electrode of the fingerprint detection element and driving electrodes are formed is by conduction
Grid is constituted.
Preferably, further include a fingerprint recognition chip, be set to the second face of the substrate, the fingerprint recognition chip is logical
It crosses second lead and is connected to the side lead, the fingerprint recognition chip moves finger and fingerprint detection member to user
Coupling between part is sensitive.
Preferably, the side lead, the first lead and the second lead pass through the side of sputter, vapor deposition, etching or silk-screen respectively
Formula is formed in the substrate.
Preferably, further include a protective layer, at least cover the fingerprint detection element and first flexible substrate.
Preferably, the protective layer is that class bores carbon plated film or high anti-fingerprint AF films thoroughly.
According to another aspect of the present invention, a kind of electronic device with fingerprint recognition detection function is also provided, including
Such as above-mentioned fingerprint recognition detection components.
Preferably, the substrate is the transparent cover plate of touch display screen, and the fingerprint detection element is set to the touch
The non-display area of display screen.
According to technical solution disclosed by the invention, may be implemented to realize fingerprint on the electronic devices such as such as portable terminal
Identification, and need not be by physical button, but fingerprint recognition is carried out on the non-display area transparent cover plate of such as display screen, expand
The practical application for having opened up fingerprint recognition is particularly suitable for the Android mobile phone etc. of no entity HOME keys.
Description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the electronic device for fingerprint recognition detection of the embodiment of the present invention；
Fig. 2 is the sectional view in the regions S in Fig. 1；
Fig. 3 is the schematic diagram of the first lead on the faces a of substrate in Fig. 2；
Fig. 4 is the schematic diagram of lead on the upside of the faces c of substrate in Fig. 2；
Fig. 5 is the enlarged drawing of the faces a edge groove of substrate in Fig. 2；
Fig. 6 is the enlarged drawing of the change case of the faces a edge groove of substrate in Fig. 2；
Fig. 7 is the first circuit diagram of fingerprint detecting element in the embodiment of the present invention；
Fig. 8 is second of circuit diagram of fingerprint detecting element in the embodiment of the present invention；
Fig. 9 is the third circuit diagram of fingerprint detecting element in the embodiment of the present invention；And
Figure 10 is the 4th kind of circuit diagram of fingerprint detecting element in the embodiment of the present invention.
Wherein, the reference numerals are as follows：
1 substrate
The first faces a
The second faces b
The sides c
2 side leads
3,3 ', 300 ', 300 " fingerprint detection element
4 first leads
5 second leads
6 fingerprint recognition chips
7 protective layers
8 protection pedestals
9 mainboards
10 grooves
10 ' groove driving circuits
30 induction electrodes
31 driving electrodes
32 reference electrodes
33 illusory driving electrodes
34 detector gaps
35 gaps
36 difference filters
37 difference amplifiers
38 conducting wires
39 finger glide directions
H driving circuits
300 fingerprint sensing regions
301 first driving electrodes
302 first induction electrodes
303 first reference electrodes
304 first illusory driving electrodes
305 first detector gaps
306 difference filters
307 difference amplifiers
308 second driving electrodes
309 second induction electrodes
310 second reference electrodes
311 second illusory driving electrodes
312 second detector gaps
313 difference filters
314 difference amplifiers
315
Specific implementation mode
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.It is identical attached in figure
Icon note indicates same or similar structure, thus will omit repetition thereof.
Described feature, structure or characteristic can be incorporated in one or more embodiments in any suitable manner
In.In the following description, many details are provided to fully understand embodiments of the present invention to provide.However,
One of ordinary skill in the art would recognize that without one or more in specific detail, or using other methods, constituent element, material
Material etc., can also put into practice technical scheme of the present invention.In some cases, be not shown in detail or describe known features, material or
Person operates to avoid the fuzzy present invention.
The attached drawing of the present invention is only used for signal relative position relation and electrical connection, and the thickness at certain positions, which uses, to be overstated
For the plotting mode shown in order to understand, the thickness in attached drawing does not represent the proportionate relationship of practical thickness.
Embodiment 1
As shown in Figures 1 to 4), the fingerprint recognition detection components of the embodiment of the present invention include substrate 1, side lead 2, fingerprint
Detecting element 3, the first lead 4, the second lead 5, fingerprint recognition chip 6 and protective layer 7.
Substrate 1 has the first face a, second face b corresponding with the first face and connects the side in the first face and the second face
c.Substrate 1 can be transparent cover plate, such as strengthened glass, tempered glass, makrolon, poly- carbon, ceramics or sapphire material etc..
1 preferred high strength material of substrate, with the element of effective protection lower part.
Side lead 2 is formed in 1 side c of substrate by way of sputter or silk-screen, and side lead 2 connects the first face a of substrate 1
With the second face b.Side lead 2 is played the data of the fingerprint recognition chip 6 of the first face a of substrate 1, is transmitted along the side of substrate 1
The effect gone to the second face b of substrate 1, avoids the technique for carrying out punching line on the substrate 1, ensure that the whole strong of substrate
Degree.
Side lead 2 wears or falls off in use in order to prevent, groove 10 can be arranged in the side of substrate 1, side is drawn
Line is formed in groove 10, and side lead 2 is protected by groove 10.Once by Fig. 5 and Fig. 6, introduce in an illustrative manner
The structure of groove.
As shown in figure 5, opening the groove 10 of a rectangle, the shape of groove 10 in the position of the central axes of the side of substrate 1
It can be diversified, be not limited.It can be bigger than the thickness of side lead 2 by the depth of groove 10.The whole cloth of side lead 2
Be located in groove 10 and (there are gap between side lead 2, ensure insulation), groove 10 can effective protection side lead 2, prevent side from drawing
Line 2 occurs to scrape or wear, and reduces the fraction defective of integral product.
As shown in fig. 6, in a change case, can also a plurality of groove 10 ' be set in the side of substrate 1, each is recessed
Slot 10 ' is all independent through slot, corresponds to single side lead 2 respectively.Each side lead 2 is located in a through slot, and
The depth of through slot can be more than the thickness of side lead 2.This structure not contact completely between side lead 2, mutually insulated.
This structure can effectively prevent the short circuit problem between side lead 2 on the basis of Fig. 5 structures.
Fingerprint detection element 3 and the first lead 4 are formed in the first face a of substrate 1 by way of sputter or silk-screen, and first
One end connection fingerprint detection element 3 of lead 4, the first end of other end connecting side lead 2.Second lead 5 passes through sputter or silk
The mode of print is formed in the second face b of substrate 1, the second end of 5 connecting side lead 2 of the second lead.So by the first lead 4,
Side lead 2 and the second lead 5 can pass the signal of the fingerprint detection element 3 of the first face a of substrate 1 via the side of substrate 1
Defeated the second face b to substrate 1.The upper surface that fingerprint detection element 3 is made in substrate 1 by the present invention is to allow fingerprint detection element
3 can be with the fingerprint of user closer to greatly reducing the distance between the electrode in fingerprint detection element 3 and the fingerprint of user.
The specific composition mode and operation principle of fingerprint detection element 3 will be described in detail later.
Fingerprint recognition chip 6 is generally located at the second face of substrate 1, with to user move finger and fingerprint detection element 3 it
Between coupling it is sensitive.The specific installation site of fingerprint recognition chip 6 can be that substrate 1 is connected to by way of flip-chip
Second face b, and fingerprint recognition chip 6 is connected with the second lead 5, to receive and handle the data that fingerprint detection element 3 transmits.
Certainly, the installation site of fingerprint recognition chip 6 can also be the mainboard 9 for being integrated in and being electrically connected with the second lead 5.For
A protection pedestal 7, the cover fingerprint recognition chip 6 can be arranged in protection fingerprint recognition chip 6 on fingerprint recognition chip 6.
Protective layer 7 covers fingerprint detection element 3 and the first lead 4.The thickness of protective layer 7 can be 50 μm, but not with this
It is limited.The material of protective layer 7 is that class bores carbon plated film (Diamond Like Carbon Coating) or high anti-fingerprint AF films thoroughly
Deng but not limited to this.
Separately below combine Fig. 7, Fig. 8, Fig. 9 and Figure 10 correspond to illustrate fingerprint detection element four kinds of constituted modes and its
Operation principle.
At least part of electrode wiring pattern in fingerprint detection element 3 is made of conductive grid.Fingerprint detection element 3
Including induction electrode 31 and a plurality of driving electrodes 32 (referring to Fig. 7).As shown in fig. 7, fingerprint detection element 3 includes multiple drivings
Electrode 32 and induction electrode 31.A plurality of driving electrodes 32 are arranged side by side and are separated from each other, a plurality of driving electrodes 32 respectively with sense
Answer electrode 31 opposite to form multiple detector gaps 35 at interval.Driving electrodes 32 are substantially parallel to each other, and are connected to
Driving circuit 30.Induction electrode 31 is arranged substantially perpendicular to driving electrodes 32.Each driving electrodes 32 pass through detector gap
35 separate with induction electrode 31.Therefore, fingerprint detection element 3 includes between each driving electrodes 32 and induction electrode 31
Linearly aligned detector gap 35.
When user when moving on the direction of induction electrode 31 or brandishing finger (such as：Hand is slided along the directions H
Refer to), driving circuit 30 sequentially encourages driving electrodes 32 with drive signal.Between the fingerprint ridge and fingerprint valley of fingerprint skim over detection
When gap 35, the drive signal for being applied to driving electrodes 32 is capacitively coupled to incude according to the capacitance of single detector gap 35
Electrode 31.Capacitance changes according to the fingerprint ridge and fingerprint valley of skimming over detector gap 35.Capacitively coupled drive signal is by coupling
It is bonded to induction electrode 31, and is detected by a sensor circuit to provide a line fingerprint image.It can be with by combining multi-slice fingerprint figure
Form complete fingerprint image.
Although the fingerprint detection element 3 of type shown in Fig. 7 provides satisfied performance, easily by parasitic couplings and by
The shadow for the interference of the noise of human body aggregation and the finger ridge outside gap coupled by the major part of finger
It rings.In order to optimize the accuracy of fingerprint recognition, the coupled interference for referring to ridge part outside gap is eliminated, that is, eliminates difference and makes an uproar
The fingerprint detection element 3 ' of improvement is shown in FIG. 8 in sound.
Identically with Fig. 7, fingerprint detection element 3 ' (Fig. 8) includes multiple driving electrodes 32 and induction electrode 31.Driving
Electrode 32 is substantially parallel to each other, and is connected to driving circuit 30.Induction electrode 31 is substantially perpendicular to 32 cloth of driving electrodes
It sets.Each driving electrodes 32 are spaced apart by 35 self-test drafting board of detector gap.Therefore, fingerprint detection element 3 ' includes positioned at each
Linearly aligned detector gap 35 between driving electrodes 32 and induction electrode 31.Driving circuit 30 is sequentially swashed with drive signal
Encourage driving electrodes 32.
Fingerprint detection element 3 ' can also include reference electrode 33 and a plurality of illusory driving electrodes 34 (referring to Fig. 8), reference
Electrode 33 is oppositely arranged with induction electrode 31 and positioned at the side opposite with a plurality of driving electrodes 32 of induction electrode 31.A plurality of void
If driving electrodes 34 are arranged side by side and are electrically connected to each other, a plurality of illusory driving electrodes 34 are arranged in correspondence with a plurality of driving electrodes 32
In the side opposite with induction electrode 31 of reference electrode 33.
Fingerprint detection element 3 ' further includes that can be separated substantially parallel to induction electrode 31 and with induction electrode 31
Reference electrode 33.Reference electrode 33 is located at the side of the induction electrode 31 opposite with driving electrodes 32, and thus by than induction
The distance of 31 bigger of electrode is separated with driving electrodes 32.Reference electrode 33 should be spaced by a distance and driving electrodes 32
It opens, this distance is enough to provide noise and parasitic coupling reference for common-mode noise elimination.In some embodiments, reference electrode 33
There can be equal length and width with induction electrode 31, and can abreast be arranged in parallel.Reference electrode 33 is similar to
Induction electrode 31 senses ridge valley signal, but its substantial remitted its fury like that.Because reference electrode 33 and induction electrode 31 are close
Ground interval and there is similar size, two electrodes produce roughly equal noise and parasitic signal.From reference electrode 33
On signal in subtract the signal on induction electrode 31 and produce the proportional ridge valley signal of difference between the signal of sensing,
Due to the relative spacing of two electrodes in detector gap 35, this is significant.But the noise and parasitism of equal coupling
Signal can be eliminated by subtracting the signal on two electrodes.
Induction electrode 31 and reference electrode 33 are coupled to difference amplifier 38 by difference filter 37.In particular, induced electricity
Pole 31 can be coupled to the positive input of difference amplifier 38 by difference filter 37, and reference electrode 33 can pass through difference
Filter 37 is coupled to the reversed input of difference amplifier 38.Difference amplifier 38 is by electronically subtracting 31 He of induction electrode
Signal on reference electrode 33 so that noise and parasitic signal are eliminated.
Fingerprint detection element 3 ' can also include the illusory driving circuit being spaced apart with reference electrode 33.As shown in Figure 8,
Illusory driving circuit may include substantial parallel illusory driving electrodes 34, be placed vertically with reference electrode 33 and by
Gap 36 is spaced apart with reference electrode 33.Parallel illusory driving electrodes 34 are electrically connected to each other by conducting wire 39, and are connected by conducting wire 39
It is connected to driving circuit 30.In some embodiments, the arrangement relative to the parallel illusory driving electrodes 34 of reference electrode 33
Arrangement with the driving electrodes 32 relative to induction electrode 31.Therefore, the width of parallel illusory driving electrodes 34, parallel illusory drive
Spacing between moving electrode 34 and the size in gap 36 can be respectively between the width of driving electrodes 32, driving electrodes 32
Spacing is identical with the size of detector gap 35.
Illusory driving circuit can be connected to reference potential during fingerprint image senses, such as be grounded.Therefore, in fingerprint
Any instant of time of image sensing, one in driving electrodes 32 can be encouraged by drive signal, and remaining driving electricity
Pole 32 is coupled to reference potential, such as is grounded.There is the example of 300 driving electrodes 32 for fingerprint detection element 3 ', it is in office
What given time, all driving electrodes 32 other than one in 300 driving electrodes 32 are connected to ground connection, and are scheming
As any given time during sensing, all parallel illusory driving electrodes 34 of illusory driving circuit are connected to ground connection.It utilizes
The arrangement, the noise on earth conductor are coupled substantially equally to induction electrode 31 and reference electrode 33.The noise of coupling is logical
It crosses difference amplifier 38 to be subtracted, and thereby is eliminated.Fingerprint image signal of concern is in induction electrode 31 and reference electrode
It is detected, and is not eliminated by difference amplifier 38 between 33.In the present embodiment, induction electrode 31, driving electrodes 32, with reference to electricity
Pole 33 and illusory driving electrodes 34 may be by traditional deposition, etching and photoetching technique and formed.
Generally, the size of detector gap 35 is less than the ridge spacing of typical fingerprint, and generally in the range of 25 to 50 μm.
In the present embodiment, the pitch between adjacent driving electrodes 32 is equal to each other and in 50 to 60 μ m, driving electrodes 32
Width is equal to each other and in 20 to 45 μ m, and the size of detector gap 35 is equal to each other and in 20 to 40 μ ms.
In an example of fingerprint detection element 3 ', driving electrodes 32 have the width of 25 μm (micron), and adjacent
Driving electrodes 32 between spacing be 25 μm.The size of detector gap 35 is 32 μm.Induction electrode 31 and reference electrode 33 it
Between spacing be 32 μm.The width of the parallel illusory driving electrodes 34 of illusory driving circuit is 25 μm and adjacent illusory driving
Spacing between electrode 34 is 25 μm.The size in gap 36 is 32 μm.Here process parameter is presented merely as illustrative,
It is not intended to limit about the scope of the present invention.
Referring to Fig. 9, fingerprint detection element 300 ' may include a fingerprint sensing region 301 to sense finger inswept on it
Line.For different applications, the size and shape in fingerprint sensing region 301 can optionally change.
In certain embodiments, fingerprint sensing region 301 may include first induction electrode 303, corresponding first induction
302, second induction electrodes 310 of a plurality of first driving electrodes of electrode 303 and corresponding second induction electrode 310 it is a plurality of
Second driving electrodes 309.First driving electrodes 302 are arranged side by side and are separated from each other, and the first driving electrodes 302 respectively with
First induction electrode 303 is opposite to form multiple first detector gaps 306 at interval.Second induction electrode 310 and first is felt
Electrode 303 is answered to be arranged in parallel and positioned at the side opposite with a plurality of first driving electrodes 302 of the first induction electrode 303.Second
Driving electrodes 309 are arranged side by side and are separated from each other, and the second driving electrodes 309 are spaced with the second induction electrode 310 respectively
Open it is opposite to form multiple second detector gaps 313.Second driving electrodes 309 and a plurality of first driving electrodes 302 are accordingly
The side opposite with the first induction electrode 303 in the second induction electrode 310 is set.
In the present embodiment, the section between pitch and adjacent second driving electrodes 309 between adjacent first driving electrodes 302
Away from being equal to each other and in 50 to 60 μ ms, but not limited to this.The width and the second driving electrodes of first driving electrodes 302
309 width is equal to each other and in 20 to 45 μ ms, but not limited to this.Between the detection of first detector gap 306 and second
The size of gap 313 is equal to each other and in 20 to 40 μ ms, but not limited to this.
Fingermark image can pass through inswept first driving electrodes of finger 302 respectively between the first induction electrode 303
One detector gap 306 and the second driving electrodes 309 respectively the second detector gap 313 between the second induction electrode 310 and produce
It is raw.These signals are combined into fingermark image, similar to using progressive scan to generate the mode of fax imagery.
In certain embodiments, the first driving electrodes 302 are set as sequence transmission detectable signal one by one.This detectable signal can
It is sensed on the first induction electrode 303.Similar to the first driving electrodes 302, the first induction electrode 303 can be and driving circuit
One conductive electrode of 300 connections.
At the first induction electrode 303, response signal can be generated in response to detectable signal.The amplitude of back-signalling can depend on
In whether there is finger in Multiple factors, such as fingerprint sensing region 301, especially in certain the first driving electrodes 302 and first
Whether ridge or the paddy of fingerprint are just had in the first detector gap 306 between induction electrode 303.At the first induction electrode 303
The amplitude of the response signal of generation can be with the first detector gap between first driving electrodes 302 and the first induction electrode 303
The ridge of finger or the RF impedance of paddy are directly related on 306.
Fingerprint sensing region 301 (including the first driving electrodes 302 and first induction electrode 303) may be with driving circuit
300 electrical connections but actual separation.First induction electrode 303 and the second induction electrode 310 are positioned at except silicon chip, or can be subtracted
Static discharge, abrasion and the broken possibility of small sensor, so as to improve the reliability of fingerprint detection element 300 '.So also may be used
According to traditional chips shrink down route map, the cost of fingerprint detection element 300 ' is allowed to be reduced with time.This framework with directly connect
Sensor (sensor being integrated on silicon chip) is touched compared to there is an obvious advantage, because being in direct contact sensor cannot be retracted to
Than professional standard fingerprint width smaller.
In the present embodiment, by sharing the first driving electrodes 302, the second driving electrodes 309,303 and of the first induction electrode
Second induction electrode 310 constitutes a pair of line imaging device, for generating accurately without deformation fingermark image.Is first passed through by finger
One induction electrode 303 or the second induction electrode 310 determine direction when the inswept fingerprint sensing region 301 of finger, also, logical
It crosses and compares the signal intensity of the first induction electrode 303 and the second induction electrode 310 to determine the inswept fingerprint sensing region of finger 301
When speed (such as：By calculate identical finger-print region by the first induction electrode 303 and the second induction electrode 310 when
Between difference obtain digit speed), more accurate fingermark image is obtained with this.
Referring to Figure 10, fingerprint detection element 300 " may include a fingerprint sensing region 301 to sense finger inswept on it
Line.For different applications, the size and shape in fingerprint sensing region 301 can optionally change.Fingerprint sensing region 301 can wrap
Include 302, second induced electricities of a plurality of first driving electrodes of first induction electrode 303, corresponding first induction electrode 303
A plurality of second driving electrodes 309 of pole 310 and corresponding second induction electrode 310.First driving electrodes 302 and second driving electricity
Pole 309 is separately connected driving circuit 300.First driving electrodes 302 are arranged side by side and are separated from each other, and the first driving electrodes
302 is opposite to form multiple first detector gaps 306 at interval with the first induction electrode 303 respectively.Second induction electrode 310
It is arranged in parallel with the first induction electrode 303 and positioned at one opposite with a plurality of first driving electrodes 302 of the first induction electrode 303
Side.Second driving electrodes 309 are arranged side by side and are separated from each other, and the second driving electrodes 309 respectively with the second induction electrode
310 is opposite to form multiple second detector gaps 313 at interval.Second driving electrodes 309 and a plurality of first driving electrodes 302
It is arranged in correspondence with the side opposite with the first induction electrode 303 in the second induction electrode 310.
And unlike Fig. 9, the fingerprint detection element 300 in Figure 10 " the first induction electrode and the second induction electrode
It is equipped with corresponding reference electrode, illusory driving electrodes, difference filter and difference amplifier.
First reference electrode 304 and the first induction electrode 303 are parallelly oppositely arranged and positioned at the first induction electrodes 303
The side opposite with a plurality of first driving electrodes 302.Similarly, the second reference electrode 311 and the second induction electrode 310 be parallelly
It is oppositely arranged and is located at the side opposite with a plurality of second driving electrodes 309 of the second induction electrode 310.
Fingerprint detection element 300 " include a plurality of first illusory driving electrodes 305 and a plurality of second illusory driving electrodes 312,
A plurality of first illusory driving electrodes 305 are arranged side by side and are electrically connected to each other, a plurality of first illusory driving electrodes 305 and a plurality of first
Driving electrodes 302 are arranged in correspondence in the side opposite with the first induction electrode 303 of the first reference electrode 304, and a plurality of second
Illusory driving electrodes 312 are arranged side by side and are electrically connected to each other, a plurality of second illusory driving electrodes 312 and a plurality of second driving electrodes
309 are arranged in correspondence in the side opposite with the second induction electrode 310 of the second reference electrode 311.In the present embodiment, first
Illusory driving electrodes 305 and the second illusory driving electrodes 312 can be all grounded, and but not limited to this.Fingerprint detection element
300 " further include difference filter 307, difference amplifier 308, difference filter 314 and difference amplifier 315.In a reality
It applies in example, difference filter 307, difference amplifier 308, difference filter 314 and difference amplifier 315 can also be formed in
Fingerprint detection element 300 " among (pass through semiconductor chip production technology).First induction electrode 303 and the first reference electrode 304
Pass through positive input and reverse input end that difference filter 307 is connected to difference amplifier 308, difference amplifier respectively
307 by electronically subtracting the signal on the first induction electrode 303 and the first reference electrode 304 so that noise and parasitic letter
It number is eliminated.Similarly, the second induction electrode 310 and the second reference electrode 311 are connected to difference by difference filter 314 respectively
Divide the positive input and reverse input end of amplifier 315.Difference amplifier 315 is by electronically subtracting the second induction electrode
310 and the second signal on reference electrode 311 so that noise and parasitic signal are eliminated.
" can effectively it disappear on the basis of the fingerprint detection element 300 ' of Fig. 9 as it can be seen that fingerprint detecting element 300 in Figure 10
Except noise and parasitic signal, to obtain more accurate fingerprint image.
Hereafter with the manufacture of Fig. 1 fingerprint recognition detection components illustrated the present invention to 4 illustrated embodiments
Key step：
Several substrates 1 are provided, are neatly stacked together, then pass through sputter or silk-screen in the side of these substrates 1
Mode forms side lead 2, and the first face a of each substrate 1 is then formed 4 He of the first lead by way of sputter or silk-screen
Fingerprint detection element 3, the first lead 4 connect fingerprint detection element 3；Then pass through sputter or silk-screen in the second face b of substrate 1
Mode forms the second lead 5 so that side lead 2 is separately connected the first lead 4 and the second lead 5；And in the second face of substrate 1
The upper welding fingerprint recognition chip 6 of b, fingerprint recognition chip 6 connect the second lead 5 so that whole lead (i.e. the first lead 4, side
Lead 2 and the second lead 5) fingerprint knowledge can be connected to from the fingerprint detection element 3 in 1 first face of substrate around the side of substrate 1
The signal of fingerprint detection element 3 is transferred to the fingerprint recognition chip in the second face of substrate 1 by other chip 6 from the first face of substrate 1
6, last protective mulch 7 on the fingerprint detection element 3 and the first lead 4 on 1 first face a of substrate.
In a change case, the side of the substrate 1 stacked can be initially formed to groove, and (such as Fig. 5 or 6 can be adopted
With such as etching technics etched recesses), then the techniques such as sputter, vapor deposition and printing is used to form conductive material in groove, then
Carry out follow-up process.As before, groove has many advantages, such as to protect conductive material external force in its groove to touch and fall off, fraction defective is reduced.
In another change case, (A) can be etched fingerprint detection element 3 and the first lead in the first face a of substrate 1
4, (B) stacks 1 sputter of substrate or silk-screen side lead 2 and (C) and etches the second lead 14 in the second face b of substrate 1, these three steps
Rapid sequence is arbitrarily exchanged, and the fingerprint recognition detection components of the present invention can be made.
It continues to refer to figure 1 to 4, according to another aspect of the present invention, also provides a kind of electricity for fingerprint recognition detection
Sub-device (such as the portable terminals such as mobile phone, ipad or entrance guard device), including above-mentioned fingerprint recognition detection components.Substrate 1
For the transparent cover plate of touch display screen, fingerprint detection element 3 is set to the non-display area of touch display screen, fingerprint detection element 3
Signal the second face of transparent cover plate is sent to along the first lead 4, side lead 2 and the second lead 5 from the first face of transparent cover plate.
Touch panel unit (not shown) is set to the display area in the second face of transparent cover plate, and mainboard 9 is separately connected touch screen group
Second lead 5 of part and fingerprint recognition detection components.Electronic device can also include a rear cover, the cover electronic device back, after
It covers and is equipped with ring protection wall, ring protection wall the cover fingerprint recognition chip 6.The electronic device can be in the transparency cover of display screen
Fingerprint recognition is carried out on plate, realization principle is as before, details are not described herein again.
In summary, fingerprint recognition detection components of the invention and its electronic device may be implemented in such as portable terminal
Fingerprint recognition is realized on equal electronic devices, and need not be by physical button, but the transparent cover plate in such as display screen is enterprising
Row fingerprint recognition extends the practical application of fingerprint recognition, is particularly suitable for the Android mobile phone etc. of no entity HOME keys.
It is particularly shown and described exemplary embodiments of the present invention above.It should be understood that the present invention is not limited to institute
Disclosed embodiment, on the contrary, it is intended to cover comprising within the scope of the appended claims various modifications and equivalent set
It changes.
Claims (10)
1. a kind of fingerprint recognition detection components, which is characterized in that including：
Substrate, the side with the first face, the second face corresponding with first face and connection first face and the second face
Face；
Side lead is set to the side of the substrate；
Fingerprint detection element is set to the first face of the substrate；
First lead is set to the first face of the substrate, and one end of first lead is electrically connected the fingerprint detection element,
The other end connects the side lead；And
Second lead, is set to the second face of the substrate, and one end of second lead is electrically connected the side lead；
Wherein, the fingerprint detection element includes：
First induction electrode；
A plurality of first driving electrodes, a plurality of first driving electrodes are arranged side by side and are separated from each other, and described a plurality of first drives
Moving electrode is opposite to form multiple first detector gaps at interval with first induction electrode respectively；
Second induction electrode, be arranged in parallel with first induction electrode and be located at first induction electrode with it is described a plurality of
The opposite side of first driving electrodes；
A plurality of second driving electrodes, a plurality of second driving electrodes are arranged side by side and are separated from each other, and described a plurality of second drives
Moving electrode is opposite to form multiple second detector gaps at interval with second induction electrode respectively, and described a plurality of second drives
Moving electrode is arranged in correspondence with a plurality of first driving electrodes in second induction electrode and first induction electrode
Opposite side；
The fingerprint detection element further includes the first reference electrode and the second reference electrode, first reference electrode and described the
One induction electrode is parallelly oppositely arranged and positioned at the opposite with a plurality of first driving electrodes of first induction electrode
Side, second reference electrode are parallelly oppositely arranged with second induction electrode and positioned at second induction electrodes
The side opposite with a plurality of second driving electrodes；
Pattern at least part that the induction electrode and driving electrodes of the fingerprint detection element are formed is made of conductive grid.
2. fingerprint recognition detection components as described in claim 1, it is characterised in that：The fingerprint detection element further includes a plurality of
First illusory driving electrodes and a plurality of second illusory driving electrodes, a plurality of first illusory driving electrodes are arranged side by side and each other
Electrical connection, a plurality of first illusory driving electrodes are arranged in correspondence with a plurality of first driving electrodes in first reference
The side opposite with first induction electrode of electrode, a plurality of second illusory driving electrodes are arranged side by side and are electrically connected each other
It connects, a plurality of second illusory driving electrodes are arranged in correspondence with a plurality of second driving electrodes in second reference electrode
The side opposite with second induction electrode.
3. fingerprint recognition detection components as described in claim 1, it is characterised in that：Pitch between adjacent first driving electrodes
And the pitch between adjacent second driving electrodes is equal to each other and in 50 to 60 μ ms；The width of first driving electrodes and
The width of two driving electrodes is equal to each other and in 20 to 45 μ m；The size of first detector gap and the second detector gap that
This is equal and in 20 to 40 μ ms.
4. fingerprint recognition detection components as described in claim 1, it is characterised in that：The side of the substrate set there are one or
Multiple grooves, the side lead are formed in the groove.
5. fingerprint recognition detection components as described in claim 1, it is characterised in that：Further include a fingerprint recognition chip, setting
In the second face of the substrate, the fingerprint recognition chip is connected to the side lead, the fingerprint by second lead
It is sensitive that identification chip moves the coupling between finger and the fingerprint detection element to user.
6. fingerprint recognition detection components as described in claim 1, it is characterised in that：The side lead, the first lead and second
Lead is formed in the substrate by way of sputter, vapor deposition, etching or silk-screen respectively.
7. fingerprint recognition detection components as described in claim 1, it is characterised in that：Further include a protective layer, at least covers institute
State fingerprint detection element and the first flexible substrate.
8. fingerprint recognition detection components as claimed in claim 7, it is characterised in that：The protective layer is that class bores carbon plated film or height
Saturating anti-fingerprint AF films.
9. a kind of electronic device with fingerprint recognition detection function, including refer to as claimed in any of claims 1 to 8 in one of claims
Line recognition detection component.
10. the electronic device with fingerprint recognition detection function as claimed in claim 9, it is characterised in that：The substrate is
The transparent cover plate of touch display screen, the fingerprint detection element are set to the non-display area of the touch display screen.
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| CN201410313037.XA CN104050463B (en) | 2014-07-02 | 2014-07-02 | Fingerprint recognition detection components and its electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410313037.XA CN104050463B (en) | 2014-07-02 | 2014-07-02 | Fingerprint recognition detection components and its electronic device |
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| CN105068605A (en) * | 2015-07-31 | 2015-11-18 | 信利光电股份有限公司 | Cover plate and electronic device |
| CN110674686B (en) * | 2019-08-19 | 2022-08-26 | 华为技术有限公司 | Fingerprint identification device and electronic equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566840A (en) * | 2010-11-02 | 2012-07-11 | 爱特梅尔公司 | Capacitive sensor, device and method |
| CN103530609A (en) * | 2013-10-11 | 2014-01-22 | 北京京东方光电科技有限公司 | Fingerprint identification element, display screen and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8786033B2 (en) * | 2006-09-01 | 2014-07-22 | IVI Holdings, Ltd. | Biometric sensor and sensor panel, method for detecting biometric pattern using the same, and method for manufacturing the same |
| US8866347B2 (en) * | 2010-01-15 | 2014-10-21 | Idex Asa | Biometric image sensing |
| CN203930874U (en) * | 2014-07-02 | 2014-11-05 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition detection components and electronic installation thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102566840A (en) * | 2010-11-02 | 2012-07-11 | 爱特梅尔公司 | Capacitive sensor, device and method |
| CN103530609A (en) * | 2013-10-11 | 2014-01-22 | 北京京东方光电科技有限公司 | Fingerprint identification element, display screen and display device |
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Address after: 330029 No. 1189 Jingdong Avenue, Nanchang high tech Zone, Jiangxi Patentee after: Jiangxi OMS Microelectronics Co.,Ltd. Patentee after: Nanchang OFilm Tech. Co.,Ltd. Patentee after: Ophiguang Group Co.,Ltd. Patentee after: SUZHOU OFILM TECH Co.,Ltd. Address before: 330029 No. 1189 Jingdong Avenue, Nanchang high tech Zone, Jiangxi Patentee before: OFilm Microelectronics Technology Co.,Ltd. Patentee before: Nanchang OFilm Tech. Co.,Ltd. Patentee before: OFilm Tech Co.,Ltd. Patentee before: SUZHOU OFILM TECH Co.,Ltd. Address after: 330029 No. 1189 Jingdong Avenue, Nanchang high tech Zone, Jiangxi Patentee after: OFilm Microelectronics Technology Co.,Ltd. Patentee after: Nanchang OFilm Tech. Co.,Ltd. Patentee after: OFilm Tech Co.,Ltd. Patentee after: SUZHOU OFILM TECH Co.,Ltd. Address before: 330029 No. 1189 Jingdong Avenue, Nanchang high tech Zone, Jiangxi Patentee before: NANCHANG OFILM BIO-IDENTIFICATION TECHNOLOGY Co.,Ltd. Patentee before: Nanchang OFilm Tech. Co.,Ltd. Patentee before: Shenzhen OFilm Tech Co.,Ltd. Patentee before: SUZHOU OFILM TECH Co.,Ltd. |
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Effective date of registration: 20210727 Address after: 330096 No.699 Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi OMS Microelectronics Co.,Ltd. Address before: 330029 No. 1189 Jingdong Avenue, Nanchang high tech Zone, Jiangxi Patentee before: Jiangxi OMS Microelectronics Co.,Ltd. Patentee before: Nanchang OFilm Tech. Co.,Ltd. Patentee before: Ophiguang Group Co.,Ltd. Patentee before: SUZHOU OFILM TECH Co.,Ltd. |
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