CN203930874U - Fingerprint recognition detection components and electronic installation thereof - Google Patents
Fingerprint recognition detection components and electronic installation thereof Download PDFInfo
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- CN203930874U CN203930874U CN201420364233.5U CN201420364233U CN203930874U CN 203930874 U CN203930874 U CN 203930874U CN 201420364233 U CN201420364233 U CN 201420364233U CN 203930874 U CN203930874 U CN 203930874U
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Abstract
The utility model has disclosed fingerprint recognition detection components and electronic installation thereof, and wherein, fingerprint recognition detection components comprises: substrate, has first surface, corresponding with described first surface second and connect described first surface and the side of second; Side goes between, and is arranged at the side of described substrate; Fingerprint detection element, is arranged at the first surface of described substrate; First goes between, and is arranged at the first surface of described substrate, and one end of described the first lead-in wire is electrically connected described fingerprint detection element, and the other end connects described side lead-in wire; And second lead-in wire, be arranged at second of described substrate, one end of described the second lead-in wire is electrically connected described side lead-in wire, the utility model can be realized on the electronic installations such as such as portable terminal and realize fingerprint recognition, and need to be by physical button, but carry out fingerprint recognition on the non-display area transparent cover plate as display screen, and expand the practical application of fingerprint recognition, be particularly useful for Android mobile phone not having on entity HOME key etc.
Description
Technical field
The utility model relates to fingerprint recognition field, particularly a kind of fingerprint recognition detection components and have the electronic installation of this fingerprint recognition detection components.
Background technology
Along with the widespread use of portable terminal in people's daily life, from strength to strength, and this diversified function has facilitated user to the function of present portable terminal.But portable terminal, in providing more conveniences for user, has carried too many personal information; if once this portable terminal is lost or is stolen; these information, due to the protection of not being correlated with, are therefore easy to let out, and make troubles to user.Therefore, on portable terminal, do some settings aspect secret and seem very necessary.
The function of keeping secret of traditional portable terminal that possesses touch-screen is nothing but to arrange as software functions such as keypad lock on portable terminal, and realizes secret by input password.This traditional portable terminal that possesses touch-screen, conventionally keypad lock is arranged at the edge side of portable terminal highlightedly with button form, therefore user is grabbing while pinching portable terminal or can press unintentionally keypad lock, thereby drives portable terminal, consumes the electric weight of portable terminal.And, because the edge side at portable terminal is provided with keypad lock, thereby give unsmooth, irregular sensation, reduce the exterior quality of portable terminal.Meanwhile, when realizing when secret by input password, all will input password at every turn, therefore seem cumbersome, and password is easily cracked and causes function of keeping secret to lose efficacy.
Utility model content
The electronic installation that the purpose of this utility model is to provide a kind of fingerprint recognition detection components and has this fingerprint recognition detection components is realized fingerprint recognition on the electronic installations such as such as portable terminal.
According to an aspect of the present utility model, a kind of fingerprint recognition detection components is provided, comprising:
Substrate, has first surface, corresponding with described first surface second and connect described first surface and the side of second;
Side goes between, and is arranged at the side of described substrate;
Fingerprint detection element, is arranged at the first surface of described substrate;
First goes between, and is arranged at the first surface of described substrate, and one end of described the first lead-in wire is electrically connected described fingerprint detection element, and the other end connects described side lead-in wire; And
Second goes between, and is arranged at second of described substrate, and one end of described the second lead-in wire is electrically connected described side lead-in wire;
Wherein, described fingerprint detection element comprises:
The first induction electrode;
Many the first drive electrodes, described many first drive electrodes are arranged side by side and are spaced apart from each other, and described many first drive electrodes are relative to form multiple the first detector gap at interval with described the first induction electrode respectively;
The second induction electrode, be arranged in parallel with described the first induction electrode and is positioned at the contrary side with described many first drive electrodes of described the first induction electrode;
Many the second drive electrodes, described many second drive electrodes are arranged side by side and are spaced apart from each other, described many second drive electrodes are relative to form multiple the second detector gap at interval with described the second induction electrode respectively, and described many second drive electrodes and described many first drive electrodes are arranged on the contrary side with described the first induction electrode of described the second induction electrode accordingly.
Preferably, described fingerprint detection element also comprises the first reference electrode and the second reference electrode, described the first reference electrode is oppositely arranged and is positioned at the contrary side with described many first drive electrodes of described the first induction electrode abreast with described the first induction electrode, described the second reference electrode is oppositely arranged and is positioned at the contrary side with described many second drive electrodes of described the second induction electrode abreast with described the second induction electrode.
Preferably, described fingerprint detection element also comprises many first illusory drive electrodes and many second illusory drive electrodes, described many first illusory drive electrodes are arranged side by side and are electrically connected to each other, described many first illusory drive electrodes and described many first drive electrodes are arranged on the contrary side with described the first induction electrode of described the first reference electrode accordingly, described many second illusory drive electrodes are arranged side by side and are electrically connected to each other, described many second illusory drive electrodes and described many second drive electrodes are arranged on the contrary side with described the second induction electrode of described the second reference electrode accordingly.
Preferably, the pitch between the pitch between adjacent the first drive electrode and adjacent the second drive electrode is equal to each other and within the scope of 50 to 60 μ m; The width of the width of the first drive electrode and the second drive electrode is equal to each other and within the scope of 20 to 45 μ m; The size of the first detector gap and the second detector gap is equal to each other and within the scope of 20 to 40 μ m.
Preferably, the side of described substrate is provided with one or more groove, and described side lead-in wire is formed in described groove.
Preferably, pattern at least a portion that the induction electrode of described fingerprint detection element and drive electrode form is made up of conductive grid.
Preferably, also comprise a fingerprint recognition chip, be arranged at second of described substrate, described fingerprint recognition chip is connected to described side lead-in wire by described the second lead-in wire, and described fingerprint recognition chip is to the coupling sensitivity between user's moveable finger and described fingerprint detection element.
Preferably, described side lead-in wire, the first lead-in wire and the second lead-in wire are formed at described substrate by the mode of sputter, evaporation, etching or silk-screen respectively.
Preferably, also comprise a protective seam, at least cover described fingerprint detection element and described the first flexible substrate.
Preferably, described protective seam is that class is bored carbon plated film or high saturating anti-fingerprint AF film.
According to another aspect of the present utility model, a kind of electronic installation with fingerprint recognition measuring ability is also provided, comprise fingerprint recognition detection components described above.
Preferably, the transparent cover plate that described substrate is touch display screen, described fingerprint detection element is arranged at the non-display area of described touch display screen.
According to the disclosed technical scheme of the utility model, can realize on the electronic installations such as such as portable terminal and realize fingerprint recognition, and need to be by physical button, but carry out fingerprint recognition on the non-display area transparent cover plate as display screen, expand the practical application of fingerprint recognition, be particularly useful for Android mobile phone not having on entity HOME key etc.
Brief description of the drawings
By describe its example embodiment in detail with reference to accompanying drawing, above-mentioned and further feature of the present utility model and advantage will become more obvious.
Fig. 1 is the electronic installation for fingerprint recognition detection of the utility model embodiment;
Fig. 2 is the sectional view in S region in Fig. 1;
Fig. 3 is the schematic diagram of the first lead-in wire on a face of substrate in Fig. 2;
Fig. 4 is the schematic diagram of the c face upside lead-in wire of substrate in Fig. 2;
Fig. 5 is the enlarged drawing of a face edge groove of substrate in Fig. 2;
Fig. 6 is the enlarged drawing of the variation example of a face edge groove of substrate in Fig. 2;
Fig. 7 is the first circuit theory diagrams of fingerprint detecting element in the utility model embodiment;
Fig. 8 is the second circuit theory diagrams of fingerprint detecting element in the utility model embodiment;
Fig. 9 is the third circuit theory diagrams of fingerprint detecting element in the utility model embodiment; And
Figure 10 is the 4th kind of circuit theory diagrams of fingerprint detecting element in the utility model embodiment.
Wherein, description of reference numerals is as follows:
1 substrate
A first surface
Second of b
C side
2 side lead-in wires
3,3 ', 300 ', 300 " fingerprint detection elements
4 first lead-in wires
5 second lead-in wires
6 fingerprint recognition chips
7 protective seams
8 protection bases
9 mainboards
10 grooves
10 ' groove driving circuit
30 induction electrodes
31 drive electrodes
32 reference electrodes
33 illusory drive electrodes
34 detector gap
35 gaps
36 difference filters
37 differential amplifiers
38 wires
39 finger sliding directions
H driving circuit
300 fingerprint sensing regions
301 first drive electrodes
302 first induction electrodes
303 first reference electrodes
304 first illusory drive electrodes
305 first detector gap
306 difference filters
307 differential amplifiers
308 second drive electrodes
309 second induction electrodes
310 second reference electrodes
311 second illusory drive electrodes
312 second detector gap
313 difference filters
314 differential amplifiers
315
Embodiment
Referring now to accompanying drawing, example embodiment is more fully described.But example embodiment can be implemented in a variety of forms, and should not be understood to be limited to embodiment set forth herein; On the contrary, provide these embodiments to make the utility model by comprehensive and complete, and the design of example embodiment is conveyed to those skilled in the art all sidedly.Identical in the drawings Reference numeral represents same or similar structure, thereby will omit being repeated in this description them.
Described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, thus provide many details to provide fully understanding embodiment of the present utility model.But, one of ordinary skill in the art would recognize that there is no one or more in specific detail, or adopt other method, constituent element, material etc., also can put into practice the technical solution of the utility model.In some cases, be not shown specifically or describe known features, material or operation to avoid fuzzy the utility model.
Accompanying drawing of the present utility model is only for illustrating relative position relation and electrical connection, and the bed thickness at some position has adopted the plotting mode of lavishing praise on oneself so that understand, and the bed thickness in accompanying drawing does not represent the proportionate relationship of actual bed thickness.
Embodiment 1
As shown in Figures 1 to 4), the fingerprint recognition detection components of the utility model embodiment comprises substrate 1, side lead-in wire 2, fingerprint detection element 3, the first lead-in wire 4, the second lead-in wire 5, fingerprint recognition chip 6 and protective seam 7.
Substrate 1 has first surface a, corresponding with first surface second b and connects first surface and the side c of second.Substrate 1 can be transparent cover plate, such as tempered glass, tempered glass, polycarbonate, poly-carbon, pottery or sapphire material etc.Substrate 1 preferred high strength material, effectively to protect the element of bottom.
Side lead-in wire 2 is formed at substrate 1 side c by the mode of sputter or silk-screen, and side lead-in wire 2 connects first surface a and second b of substrate 1.Side lead-in wire 2 plays the data of the fingerprint recognition chip 6 of the first surface a of substrate 1, is delivered to second effect that b goes of substrate 1 along the side of substrate 1, and the technique of the line of having avoided punching on substrate 1 has ensured the bulk strength of substrate.
In order to prevent that side lead-in wire 2 from use wearing and tearing or coming off, can groove 10 be set in the side of substrate 1, side lead-in wire is formed in groove 10, protect side lead-in wire 2 by groove 10.By Fig. 5 and Fig. 6, introduce the structure of groove in the mode of example once.
As shown in Figure 5, open the groove 10 of a rectangle in the position of the axis of the side of substrate 1, the shape of groove 10 can be diversified, not as limit.Can be larger than go between 2 thickness of side by the degree of depth of groove 10.Side lead-in wire 2 is all laid in groove 10 and (between side lead-in wire 2, leaves gap, ensure insulation), and groove 10 can effectively be protected side lead-in wire 2, prevents that side lead-in wire 2 from scraping or wearing and tearing occurring, and reduce the fraction defective of integral product.
As shown in Figure 6, change in example at one, also can many grooves 10 ' be set in the side of substrate 1, independently through slot, respectively corresponding single side lead-in wire 2 of each groove 10 ' be all.Each root side lead-in wire 2 is located in a through slot, and the degree of depth of through slot can be greater than the thickness of side lead-in wire 2.This structure makes not contact completely between side lead-in wire 2, mutually insulated.This structure can effectively prevent the short circuit problem between side lead-in wire 2 on the basis of Fig. 5 structure.
Fingerprint detection element 3 and the first lead-in wire 4 are formed at the first surface a of substrate 1 by the mode of sputter or silk-screen, one end of the first lead-in wire 4 connects fingerprint detection element 3, and the other end connects the first end of side lead-in wire 2.The second lead-in wire 5 is formed at second b of substrate 1 by the mode of sputter or silk-screen, the second lead-in wire 5 connects the second end of side lead-in wire 2.So, by the first lead-in wire 4, side lead-in wire 2 and the second lead-in wire 5, the signal of the fingerprint detection element 3 of the first surface a of substrate 1 can be transferred to second b of substrate 1 via the side of substrate 1.The upper surface that fingerprint detection element 3 is made in substrate 1 by the utility model is in order to allow the fingerprint detection element 3 can be more close with user's fingerprint, greatly reduces the distance between electrode and user's the fingerprint in fingerprint detection element 3.Concrete constituted mode and the principle of work of fingerprint detection element 3 will describe in detail in the back.
Fingerprint recognition chip 6 is positioned at second of substrate 1 substantially, with the coupling sensitivity between user's moveable finger and fingerprint detection element 3.The concrete installation site of fingerprint recognition chip 6 can be second b that is connected to substrate 1 by the mode of flip-chip, and fingerprint recognition chip 6 and the second lead-in wire 5 be connected, the data that transmit to receive and to process fingerprint detection element 3.
Certainly, the installation site of fingerprint recognition chip 6 can be to be also integrated in the mainboard 9 being electrically connected with the second lead-in wire 5.In order to protect fingerprint recognition chip 6, a protection base 7 can be set on fingerprint recognition chip 6, cover cap fingerprint recognition chip 6.
Protective seam 7 covers fingerprint detection element 3 and the first lead-in wire 4.The thickness of protective seam 7 can be 50 μ m, but not as limit.The material of protective seam 7 is that class is bored carbon plated film (Diamond LikeCarbon Coating) or high saturating anti-fingerprint AF film etc., but not as limit.
Below respectively in conjunction with four kinds of constituted modes and the principle of work thereof of Fig. 7, Fig. 8, Fig. 9 and the corresponding explanation of Figure 10 fingerprint detection element.
At least a portion of electrode wiring pattern in fingerprint detection element 3 is made up of conductive grid.Fingerprint detection element 3 comprises induction electrode 31 and many drive electrodes 32 (referring to Fig. 7).As shown in Figure 7, fingerprint detection element 3 comprises multiple drive electrodes 32 and induction electrode 31.Many drive electrode 32 is arranged side by side and is spaced apart from each other, and many drive electrodes 32 are relative to form multiple detector gap 35 at interval with induction electrode 31 respectively.Drive electrode 32 is parallel to each other in fact, and is connected to driving circuit 30.Induction electrode 31 is arranged perpendicular to drive electrode 32 in fact.Each drive electrode 32 is separated by detector gap 35 and induction electrode 31.Therefore, fingerprint detection element 3 comprises the linearly aligned detector gap 35 between each drive electrode 32 and induction electrode 31.
For example, when user (: slide and point along H direction) in the time moving up perpendicular to the side of induction electrode 31 or brandish finger, driving circuit 30 encourages drive electrode 32 to drive signal sequence.In the time that the fingerprint ridge of fingerprint and fingerprint paddy skim over detector gap 35, the driving signal that is applied to drive electrode 32 is capacitively coupled to induction electrode 31 according to the electric capacity of single detector gap 35.Electric capacity changes according to the fingerprint ridge and the fingerprint paddy that skim over detector gap 35.Capacitively coupled driving signal is coupled to induction electrode 31, and detects to provide a line fingerprint image by a sensor circuit.Can form complete fingerprint image by combination multi-disc fingerprint graph.
Although the fingerprint detection element 3 of type shown in Fig. 7 provides satisfied performance, be subject to intercoupling and the impact of the noise assembled by human body and the interference that is coupled from the major part of passing through to point of finger ridge outside gap.In order to optimize the accuracy of fingerprint recognition, eliminate from the coupled interference of the finger ridge part outside gap, eliminate differential noise, figure 8 illustrates the fingerprint detection element 3 of improvement '.
With in Fig. 7 in the same manner, fingerprint detection element 3 ' (Fig. 8) comprises multiple drive electrodes 32 and induction electrode 31.Drive electrode 32 is parallel to each other in fact, and is connected to driving circuit 30.Induction electrode 31 is arranged perpendicular to drive electrode 32 in fact.Each drive electrode 32 is spaced apart from check-out console by detector gap 35.Therefore, fingerprint detection element 3 ' the comprise linearly aligned detector gap 35 between each drive electrode 32 and induction electrode 31.Driving circuit 30 encourages drive electrode 32 to drive signal sequence.
Fingerprint detection element 3 ' can also comprise reference electrode 33 and many illusory drive electrodes 34 (referring to Fig. 8), reference electrode 33 is oppositely arranged and is positioned at the contrary side with many drive electrodes 32 of induction electrode 31 with induction electrode 31.Many illusory drive electrode 34 is arranged side by side and is electrically connected to each other, and many illusory drive electrodes 34 and many drive electrodes 32 are arranged on the contrary side with induction electrode 31 of reference electrode 33 accordingly.
Fingerprint detection element 3 ' also the comprise reference electrode 33 that can be parallel in fact induction electrode 31 and separate with induction electrode 31.Reference electrode 33 is positioned at a side of the induction electrode relative with drive electrode 32 31, and thereby by separating than the larger distance of induction electrode 31 and drive electrode 32.Reference electrode 33 should be spaced apart by a segment distance and drive electrode 32, and this distance is enough to eliminate noise and intercoupling reference are provided for common-mode noise.In some embodiments, reference electrode 33 and induction electrode 31 can have equal length and width, and can be arranged in parallel abreast.Reference electrode 33 is similar to the such sensing ridge/paddy signal of induction electrode 31, but its remitted its fury in fact.Because closely interval and have similar size of reference electrode 33 and induction electrode 31, two electrodes have produced roughly equal noise and spur signal.In signal from reference electrode 33, deduct that signal on induction electrode 31 has produced and the signal of sensing between the proportional ridge/paddy of difference signal, due to the relative spacing of two electrodes from detector gap 35, this is significant.But, equate that noise and the spur signal of coupling can be eliminated by deducting two signals on electrode.
Induction electrode 31 and reference electrode 33 are coupled to differential amplifier 38 by difference filter 37.Especially, induction electrode 31 can be coupled to by difference filter 37 the forward input of differential amplifier 38, and reference electrode 33 can be coupled to by difference filter 37 the reverse input of differential amplifier 38.Differential amplifier 38 deducts the signal on induction electrode 31 and reference electrode 33 by electronics mode, and noise and spur signal are eliminated.
Fingerprint detection element 3 ' can also comprise and the isolated illusory driving circuit of reference electrode 33.As shown in Figure 8, illusory driving circuit can comprise parallel in fact illusory drive electrode 34, and itself and reference electrode 33 are placed vertically and are spaced apart by gap 36 and reference electrode 33.Parallel illusory drive electrode 34 is electrically connected mutually by wire 39, and is connected to driving circuit 30 by wire 39.In some embodiments, the arrangement with respect to the drive electrode 32 of induction electrode 31 with respect to the arrangement coupling of the parallel illusory drive electrode 34 of reference electrode 33.Therefore, the size in the spacing between the width of parallel illusory drive electrode 34, parallel illusory drive electrode 34 and gap 36 can be respectively and the width of drive electrode 32, drive electrode 32 between spacing and the size of detector gap 35 identical.
Illusory driving circuit can be connected to reference potential at fingerprint image during sensing, for example ground connection.Therefore,, in any time moment of fingerprint image sensing, one in drive electrode 32 can be driven signal to encourage, and remaining drive electrode 32 is coupled to reference potential, for example ground connection.For fingerprint detection element 3 ' the have example of 300 drive electrodes 32, at any given time, all drive electrodes 32 one in 300 drive electrodes 32 are connected to ground connection, and any given time during image sensing, all parallel illusory drive electrode 34 of illusory driving circuit is connected to ground connection.Utilize this layout, the noise on earth conductor is coupled to induction electrode 31 and reference electrode 33 in fact of equal valuely.The noise of coupling is subtracted by differential amplifier 38, thereby and is eliminated.The fingerprint image signal of being concerned about is detected between induction electrode 31 and reference electrode 33, and is not eliminated by differential amplifier 38.In the present embodiment, induction electrode 31, drive electrode 32, reference electrode 33 and illusory drive electrode 34 can utilize traditional deposition, etching and photoetching technique to form.
Generally, the size of detector gap 35 is less than the ridge spacing of typical fingerprint, and general in the scope of 25 to 50 μ m.In the present embodiment, the pitch between adjacent drive electrode 32 is equal to each other and within the scope of 50 to 60 μ m, and the width of drive electrode 32 is equal to each other and within the scope of 20 to 45 μ m, and the size of detector gap 35 is equal to each other and within the scope of 20 to 40 μ m.
Fingerprint detection element 3 ' an example in, drive electrode 32 has the width of 25 μ m (micron), and spacing between adjacent drive electrode 32 is 25 μ m.The size of detector gap 35 is 32 μ m.Spacing between induction electrode 31 and reference electrode 33 is 32 μ m.The width of the parallel illusory drive electrode 34 of illusory driving circuit is that the spacing between 25 μ m and adjacent illusory drive electrode 34 is 25 μ m.The size in gap 36 is 32 μ m.The process parameter here, as just example, does not limit about scope of the present utility model.
Referring to Fig. 9, fingerprint detection element 300 ' can comprise a fingerprint sensing region 301 is with sensing inswept fingerprint thereon.For different application, the size and dimension in fingerprint sensing region 301 can optionally change.
In certain embodiments, fingerprint sensing region 301 can comprise many second drive electrodes 309 of many first drive electrodes 302 of first induction electrode 303, corresponding the first induction electrode 303, second induction electrode 310 and corresponding the second induction electrode 310.The first drive electrode 302 is arranged side by side and is spaced apart from each other, and the first drive electrode 302 is relative to form multiple the first detector gap 306 at interval with the first induction electrode 303 respectively.The second induction electrode 310 be arranged in parallel with the first induction electrode 303 and be positioned at the first induction electrode 303 with many sides that the first drive electrode 302 is contrary.The second drive electrode 309 is arranged side by side and is spaced apart from each other, and the second drive electrode 309 is relative to form multiple the second detector gap 313 at interval with the second induction electrode 310 respectively.The second drive electrode 309 is arranged on many first drive electrodes 302 side that the second induction electrode 310 is contrary with the first induction electrode 303 accordingly.
In the present embodiment, the pitch between the pitch between adjacent the first drive electrode 302 and adjacent the second drive electrode 309 is equal to each other and within the scope of 50 to 60 μ m, but not as limit.The width of the width of the first drive electrode 302 and the second drive electrode 309 is equal to each other and within the scope of 20 to 45 μ m, but not as limit.The size of the first detector gap 306 and the second detector gap 313 is equal to each other and within the scope of 20 to 40 μ m, but not as limit.
Fingermark image can see through the second detector gap 313 respectively and between the second induction electrode 310 at first detector gap 306 of inswept the first drive electrode 302 of finger respectively and between the first induction electrode 303 and the second drive electrode 309 and produce.These signals one-tenth fingermark image capable of being combined, to use line by line scan produce fax image mode similar.
In certain embodiments, the first drive electrode 302 is set as order one by one and sends detectable signal.This detectable signal can be on the first induction electrode 303 sensing.Similar to the first drive electrode 302, the first induction electrode 303 can be the conductive electrode being connected with driving circuit 300.
At the first induction electrode 303 places, can produce in response to detectable signal response signal.The amplitude of back-signalling can be depending on multiple factors, for example, on fingerprint sensing region 301, whether have finger, particularly in the first detector gap 306 between certain first drive electrode 302 and the first induction electrode 303, whether just has ridge or the paddy of fingerprint.First induction electrode 303 places produce response signal amplitude can with this first drive electrode 302 and the first induction electrode 303 between the first detector gap 306 on the ridge of finger or the radio-frequency (RF) impedance of paddy directly related.
Fingerprint sensing region 301 (comprising the first drive electrode 302 and the first induction electrode 303) may be electrically connected but actual separation with driving circuit 300.The first induction electrode 303 and the second induction electrode 310 are positioned outside silicon, maybe can reduce static discharge, wearing and tearing and the broken possibility of sensor, thereby improve the reliability of fingerprint detection element 300 '.So also can dwindle route map according to traditional chip, allow the cost of fingerprint detection element 300 ' with reducing time.This framework has an obvious advantage compared with direct feeler (being incorporated into the sensor on silicon), because directly feeler can not be retracted to less than industry standard fingerprint width.
In the present embodiment, form a pair of line imaging device by sharing the first drive electrode 302, the second drive electrode 309, the first induction electrode 303 and the second induction electrode 310, for generation of accurately without being out of shape fingermark image.Direction while first determining finger inswept fingerprint sensing region 301 by the first induction electrode 303 or the second induction electrode 310 by finger, and, speed (for example: obtain digit speed by calculating identical finger-print region by the mistiming of the first induction electrode 303 and the second induction electrode 310) while determining finger inswept fingerprint sensing region 301 by comparing the signal intensity of the first induction electrode 303 and the second induction electrode 310, obtains fingermark image more accurately with this.
Referring to Figure 10, fingerprint detection element 300 " can comprise that a fingerprint sensing region 301 is with sensing inswept fingerprint thereon.For different application, the size and dimension in fingerprint sensing region 301 can optionally change.Fingerprint sensing region 301 can comprise many second drive electrodes 309 of many first drive electrodes 302 of first induction electrode 303, corresponding the first induction electrode 303, second induction electrode 310 and corresponding the second induction electrode 310.The first drive electrode 302 is connected respectively driving circuit 300 with the second drive electrode 309.The first drive electrode 302 is arranged side by side and is spaced apart from each other, and the first drive electrode 302 is relative to form multiple the first detector gap 306 at interval with the first induction electrode 303 respectively.The second induction electrode 310 be arranged in parallel with the first induction electrode 303 and be positioned at the first induction electrode 303 with many sides that the first drive electrode 302 is contrary.The second drive electrode 309 is arranged side by side and is spaced apart from each other, and the second drive electrode 309 is relative to form multiple the second detector gap 313 at interval with the second induction electrode 310 respectively.The second drive electrode 309 is arranged on many first drive electrodes 302 side that the second induction electrode 310 is contrary with the first induction electrode 303 accordingly.
And different from Fig. 9, the fingerprint detection element 300 in Figure 10 " the first induction electrode and the second induction electrode be equipped with corresponding reference electrode, illusory drive electrode, difference filter and differential amplifier.
The first reference electrode 304 be oppositely arranged abreast with the first induction electrode 303 and be positioned at the first induction electrode 303 with many sides that the first drive electrode 302 is contrary.Similarly, the second reference electrode 311 be oppositely arranged abreast with the second induction electrode 310 and be positioned at the second induction electrode 310 with many sides that the second drive electrode 309 is contrary.
Fingerprint detection element 300 " comprises many first illusory drive electrodes 305 and many second illusory drive electrodes 312, many the first illusory drive electrode 305 is arranged side by side and is electrically connected to each other, many the first illusory drive electrodes 305 and many first drive electrodes 302 are arranged on the contrary side with the first induction electrode 303 of the first reference electrode 304 accordingly, many the second illusory drive electrode 312 is arranged side by side and is electrically connected to each other, many the second illusory drive electrodes 312 and many second drive electrodes 309 are arranged on the contrary side with the second induction electrode 310 of the second reference electrode 311 accordingly.In the present embodiment, the first illusory drive electrode 305 and all ground connection of the second illusory drive electrode 312, but not as limit.Fingerprint detection element 300 " also comprises difference filter 307, differential amplifier 308, difference filter 314 and differential amplifier 315.In one embodiment, difference filter 307, differential amplifier 308, difference filter 314 and differential amplifier 315 also can be formed at fingerprint detection element 300 " among (by semi-conductor chip production technology).The first induction electrode 303 and the first reference electrode 304 are connected to respectively positive input and the reverse input end of differential amplifier 308 through difference filter 307, differential amplifier 307 deducts the signal on the first induction electrode 303 and the first reference electrode 304 by electronics mode, and noise and spur signal are eliminated.Similarly, the second induction electrode 310 and the second reference electrode 311 are connected to respectively positive input and the reverse input end of differential amplifier 315 through difference filter 314.Differential amplifier 315 deducts the signal on the second induction electrode 310 and the second reference electrode 311 by electronics mode, and noise and spur signal are eliminated.
Visible, fingerprint detecting element 300 in Figure 10 " can the fingerprint detection element 300 of Fig. 9 ' basis on, effectively eliminate noise and spur signal, thereby obtain fingerprint image more accurately.
Below illustrate the key step of the manufacture of fingerprint recognition detection components of the present utility model with Fig. 1 to 4 illustrated embodiment:
Some substrates 1 are provided, neatly be stacked together, then form side lead-in wire 2 in the side of these substrates 1 by the mode of sputter or silk-screen, then the first surface a of every a slice substrate 1 is formed to the first lead-in wire 4 and fingerprint detection element 3, the first lead-in wire 4 connection fingerprint detection elements 3 by the mode of sputter or silk-screen; Then form the second lead-in wire 5 at second b of substrate 1 by the mode of sputter or silk-screen, make side lead-in wire 2 connect respectively the first lead-in wire 4 and the second lead-in wire 5; And at the upper welding fingerprint recognition chip 6 of second b of substrate 1; fingerprint recognition chip 6 connects the second lead-in wire 5; the side that makes entirety lead-in wire (the first lead-in wire 4, side lead-in wire 2 and second go between 5) to walk around substrate 1 from the fingerprint detection element 3 of substrate 1 first surface is connected to fingerprint recognition chip 6; the signal of fingerprint detection element 3 is transferred to the fingerprint recognition chip 6 of second of substrate 1 from the first surface of substrate 1, finally protective mulch 7 on the fingerprint detection element 3 on substrate 1 first surface a and the first lead-in wire 4.
Change in example at one, the side of the substrate stacking 1 first can be formed to groove (as Fig. 5 or 6, can adopt for example etching technics etched recesses), then adopt the techniques such as sputter, evaporation and printing that conductive material is formed in groove, then carry out successive process.As front, groove has conductive material external force in its groove of protection and touches and come off, and reduces the advantages such as fraction defective.
Change in example at another, (A) can be stacked to substrate 1 sputter or silk-screen side lead-in wire 2 and (C) go between 14 in second b etching second of substrate 1 at the first surface a of substrate 1 etching fingerprint detection element 3 and the first lead-in wire 4, (B), the order of these three steps is exchanged arbitrarily, all can make fingerprint recognition detection components of the present utility model.
Continue referring to figs. 1 to 4, according to another aspect of the present utility model, also provide a kind of electronic installation for fingerprint recognition detection (the such as portable terminal such as mobile phone, ipad or entrance guard device), comprise above-mentioned fingerprint recognition detection components.The transparent cover plate that substrate 1 is touch display screen, fingerprint detection element 3 is arranged at the non-display area of touch display screen, and the signal of fingerprint detection element 3 is sent to second of transparent cover plate along the first lead-in wire 4, side lead-in wire 2 and the second lead-in wire 5 from the first surface of transparent cover plate.Touch panel unit (not shown) is arranged at the viewing area of second of transparent cover plate, and mainboard 9 connects respectively the second lead-in wire 5 of touch panel unit and fingerprint recognition detection components.Electronic installation can also comprise a bonnet, cover cap electronic installation back, and bonnet is provided with ring protection wall, ring protection wall cover cap fingerprint recognition chip 6.This electronic installation can carry out fingerprint recognition on the transparent cover plate of display screen, realizes principle as front, repeats no more herein.
In summary, fingerprint recognition detection components of the present utility model and electronic installation thereof can be realized on the electronic installations such as such as portable terminal and realize fingerprint recognition, and need to be by physical button, but carry out fingerprint recognition on as the transparent cover plate of display screen, expand the practical application of fingerprint recognition, be particularly useful for Android mobile phone not having on entity HOME key etc.
Below illustrate particularly and described illustrative embodiments of the present utility model.Should be appreciated that, the utility model is not limited to disclosed embodiment, and on the contrary, the utility model intention contains the various amendments and the equivalent replacement that comprise within the scope of the appended claims.
Claims (12)
1. a fingerprint recognition detection components, is characterized in that, comprising:
Substrate, has first surface, corresponding with described first surface second and connect described first surface and the side of second;
Side goes between, and is arranged at the side of described substrate;
Fingerprint detection element, is arranged at the first surface of described substrate;
First goes between, and is arranged at the first surface of described substrate, and one end of described the first lead-in wire is electrically connected described fingerprint detection element, and the other end connects described side lead-in wire; And
Second goes between, and is arranged at second of described substrate, and one end of described the second lead-in wire is electrically connected described side lead-in wire;
Wherein, described fingerprint detection element comprises:
The first induction electrode;
Many the first drive electrodes, described many first drive electrodes are arranged side by side and are spaced apart from each other, and described many first drive electrodes are relative to form multiple the first detector gap at interval with described the first induction electrode respectively;
The second induction electrode, be arranged in parallel with described the first induction electrode and is positioned at the contrary side with described many first drive electrodes of described the first induction electrode;
Many the second drive electrodes, described many second drive electrodes are arranged side by side and are spaced apart from each other, described many second drive electrodes are relative to form multiple the second detector gap at interval with described the second induction electrode respectively, and described many second drive electrodes and described many first drive electrodes are arranged on the contrary side with described the first induction electrode of described the second induction electrode accordingly.
2. fingerprint recognition detection components as claimed in claim 1, it is characterized in that: described fingerprint detection element also comprises the first reference electrode and the second reference electrode, described the first reference electrode is oppositely arranged and is positioned at the contrary side with described many first drive electrodes of described the first induction electrode abreast with described the first induction electrode, described the second reference electrode is oppositely arranged and is positioned at the contrary side with described many second drive electrodes of described the second induction electrode abreast with described the second induction electrode.
3. fingerprint recognition detection components as claimed in claim 2, it is characterized in that: described fingerprint detection element also comprises many first illusory drive electrodes and many second illusory drive electrodes, described many first illusory drive electrodes are arranged side by side and are electrically connected to each other, described many first illusory drive electrodes and described many first drive electrodes are arranged on the contrary side with described the first induction electrode of described the first reference electrode accordingly, described many second illusory drive electrodes are arranged side by side and are electrically connected to each other, described many second illusory drive electrodes and described many second drive electrodes are arranged on the contrary side with described the second induction electrode of described the second reference electrode accordingly.
4. fingerprint recognition detection components as claimed in claim 1, is characterized in that: the pitch between the pitch between adjacent the first drive electrode and adjacent the second drive electrode is equal to each other and within the scope of 50 to 60 μ m; The width of the width of the first drive electrode and the second drive electrode is equal to each other and within the scope of 20 to 45 μ m; The size of the first detector gap and the second detector gap is equal to each other and within the scope of 20 to 40 μ m.
5. fingerprint recognition detection components as claimed in claim 1, is characterized in that: the side of described substrate is provided with one or more groove, and described side lead-in wire is formed in described groove.
6. fingerprint recognition detection components as claimed in claim 1, is characterized in that: pattern at least a portion that the induction electrode of described fingerprint detection element and drive electrode form is made up of conductive grid.
7. fingerprint recognition detection components as claimed in claim 1, it is characterized in that: also comprise a fingerprint recognition chip, be arranged at second of described substrate, described fingerprint recognition chip is connected to described side lead-in wire by described the second lead-in wire, and described fingerprint recognition chip is to the coupling sensitivity between user's moveable finger and described fingerprint detection element.
8. fingerprint recognition detection components as claimed in claim 1, is characterized in that: described side lead-in wire, the first lead-in wire and the second lead-in wire are formed at described substrate by the mode of sputter, evaporation, etching or silk-screen respectively.
9. fingerprint recognition detection components as claimed in claim 1, is characterized in that: also comprise a protective seam, at least cover described fingerprint detection element and described the first flexible substrate.
10. fingerprint recognition detection components as claimed in claim 9, is characterized in that: described protective seam is that class is bored carbon plated film or high saturating anti-fingerprint AF film.
11. 1 kinds have the electronic installation of fingerprint recognition measuring ability, comprise the fingerprint recognition detection components as described in any one in claim 1 to 10.
12. electronic installations with fingerprint recognition measuring ability as claimed in claim 11, is characterized in that: the transparent cover plate that described substrate is touch display screen, described fingerprint detection element is arranged at the non-display area of described touch display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420364233.5U CN203930874U (en) | 2014-07-02 | 2014-07-02 | Fingerprint recognition detection components and electronic installation thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420364233.5U CN203930874U (en) | 2014-07-02 | 2014-07-02 | Fingerprint recognition detection components and electronic installation thereof |
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| CN203930874U true CN203930874U (en) | 2014-11-05 |
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| CN201420364233.5U Expired - Fee Related CN203930874U (en) | 2014-07-02 | 2014-07-02 | Fingerprint recognition detection components and electronic installation thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050463A (en) * | 2014-07-02 | 2014-09-17 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition detection assembly and electronic device thereof |
| US9704012B2 (en) | 2015-09-10 | 2017-07-11 | Cypress Semiconductor Corporation | Fingerprint sensor pattern |
-
2014
- 2014-07-02 CN CN201420364233.5U patent/CN203930874U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104050463A (en) * | 2014-07-02 | 2014-09-17 | 南昌欧菲生物识别技术有限公司 | Fingerprint recognition detection assembly and electronic device thereof |
| US9704012B2 (en) | 2015-09-10 | 2017-07-11 | Cypress Semiconductor Corporation | Fingerprint sensor pattern |
| US10303914B2 (en) | 2015-09-10 | 2019-05-28 | Cypress Semiconductor Corporation | Fingerprint sensor pattern |
| US10956703B2 (en) | 2015-09-10 | 2021-03-23 | Cypress Semiconductor Corporation | Fingerprint sensor pattern |
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