CN107451572A - Ultrasonic fingerprint identifies module and electronic equipment - Google Patents
Ultrasonic fingerprint identifies module and electronic equipment Download PDFInfo
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- CN107451572A CN107451572A CN201710665982.XA CN201710665982A CN107451572A CN 107451572 A CN107451572 A CN 107451572A CN 201710665982 A CN201710665982 A CN 201710665982A CN 107451572 A CN107451572 A CN 107451572A
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- 239000012528 membrane Substances 0.000 claims abstract description 83
- 230000011514 reflex Effects 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims description 7
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 239000004425 Makrolon Substances 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- ZGEYCCHDTIDZAE-BYPYZUCNSA-N L-glutamic acid 5-methyl ester Chemical compound COC(=O)CC[C@H](N)C(O)=O ZGEYCCHDTIDZAE-BYPYZUCNSA-N 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 7
- 230000005684 electric field Effects 0.000 description 7
- 239000010408 film Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920001038 ethylene copolymer Polymers 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005240 physical vapour deposition Methods 0.000 description 2
- MIZLGWKEZAPEFJ-UHFFFAOYSA-N 1,1,2-trifluoroethene Chemical group FC=C(F)F MIZLGWKEZAPEFJ-UHFFFAOYSA-N 0.000 description 1
- VKEQBMCRQDSRET-UHFFFAOYSA-N Methylone Chemical compound CNC(C)C(=O)C1=CC=C2OCOC2=C1 VKEQBMCRQDSRET-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002294 plasma sputter deposition Methods 0.000 description 1
- 229920001596 poly (chlorostyrenes) Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
- H10N30/302—Sensors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
- H10N30/308—Membrane type
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The present invention provides a kind of ultrasonic fingerprint identification module, for identifying the fingerprint of finger, the ultrasonic fingerprint identification module includes ultrasonic wave emission layer and ultrasonic wave receiving layer, the ultrasonic wave emission layer is used to launch ultrasonic signal, the ultrasonic signal of transmitting is received after handling digital reflex by the ultrasonic wave receiving layer, the ultrasonic signal received using the ultrasonic wave receiving layer obtains finger print information, and the ultrasonic wave emission layer includes multiple be stacked and piezoelectric membrane in parallel.Each piezoelectric membrane sends ultrasonic wave so that sound field intensity superposition, so that when needing to provide the ultrasonic wave of some strength, can reduce the demand to driving voltage.The present invention also provides a kind of electronic equipment, and it includes above-mentioned ultrasonic fingerprint identification module, has the advantages of power consumption is low.
Description
【Technical field】
The present invention relates to fingerprint identification technology field, and in particular to a kind of ultrasonic fingerprint identification module and electronic equipment.
【Background technology】
With the development of fingerprint identification technology, it is set to be widely used in electronic product, such as mobile phone, tablet personal computer, gate inhibition
In system, to simplify the operation such as unblock or transaction payment, and it is safe.
Fingerprint identification technology includes optical fingerprint identification, capacitance type fingerprint identification and ultrasonic fingerprint identification at present, its
Middle ultrasonic fingerprint identification has the advantages of accuracy of identification is high, and is not disturbed by oil, dirty, water, can directly sense finger
Skin corium.But ultrasonic fingerprint identification needs to provide higher driving voltage, can just send ultrasonic wave, so ultrasonic wave refers to
The design and manufacture difficulty of line identification module are higher, are unfavorable for industrial production.Moreover, obtained ultrasonic fingerprint identification module
Power consumption it is larger, and then add with the ultrasonic fingerprint identification module electronic equipment power consumption.
【The content of the invention】
To overcome existing technical problem, the present invention provides a kind of ultrasonic fingerprint identification module and electronic equipment.
The present invention is to provide a kind of ultrasonic fingerprint identification module to solve a technical scheme of above-mentioned technical problem, is used for
The fingerprint of finger is identified, the ultrasonic fingerprint identification module includes ultrasonic wave emission layer and ultrasonic wave receiving layer, the ultrasound
Ripple emission layer is used to launch ultrasonic signal, and the ultrasonic signal of transmitting is connect after handling digital reflex by the ultrasonic wave receiving layer
Receive, the ultrasonic signal received using the ultrasonic wave receiving layer obtains finger print information, and the ultrasonic wave emission layer includes more
It is individual to be stacked and piezoelectric membrane in parallel.
Preferably, the ultrasonic wave emission layer also includes being used for the multiple electrodes for applying driving voltage to piezoelectric membrane；Institute
It is identical to state the polarised direction of multiple piezoelectric membranes being stacked of ultrasonic wave emission layer, and two neighboring piezoelectric membrane it
Between separation layer is set, each electrode acts only on a piezoelectric membrane.
Preferably, the ultrasonic wave emission layer also includes being used for the multiple electrodes for applying driving voltage to piezoelectric membrane；Institute
In the multiple piezoelectric membranes being stacked for stating ultrasonic wave emission layer, the polarised direction of two neighboring piezoelectric membrane it is opposite and
Share the electrode being arranged between the two.
Preferably, the layer number of the piezoelectric membrane of the ultrasonic wave emission layer is 2-4.
Preferably, the piezoelectric membrane is formed by way of original position is polarized.
Preferably, the material of the piezoelectric membrane be Kynoar, polyvinyl chloride, poly-γ-methyl-L-glutamate,
Makrolon or polyvinylidene fluoride copolymer.
Preferably, the thickness of the piezoelectric membrane is less than 30 μm.
Preferably, the thickness of the piezoelectric membrane is less than 9 μm.
Preferably, the piezoelectric constant d of the piezoelectric membrane33For 20-35pC/N.
The present invention also provides a kind of electronic equipment, and it includes above-mentioned ultrasonic fingerprint identification module.
Relative to prior art, ultrasonic fingerprint provided by the present invention identifies module, and ultrasonic wave emission layer includes multiple
It is stacked and piezoelectric membrane in parallel, each piezoelectric membrane sends ultrasonic wave so that sound field intensity is superimposed, so that
It is proper need provide some strength ultrasonic wave when, the demand to driving voltage can be reduced.So ultrasonic fingerprint knowledge can be reduced
The design and manufacture difficulty of other module, beneficial to industrial production；Moreover, the power consumption of ultrasonic fingerprint identification module is relatively low, have
Effect improves practicality.
The present invention also provides a kind of electronic equipment, and it includes above-mentioned ultrasonic fingerprint identification module, has power consumption low
The advantages of.
【Brief description of the drawings】
Fig. 1 is the structural representation of the ultrasonic fingerprint identification module that the embodiment of the present invention one is provided and touch layer.
Fig. 2 is the knot of the variant embodiment of the ultrasonic fingerprint identification module that the embodiment of the present invention one is provided and touch layer
Structure schematic diagram.
Fig. 3 be the embodiment of the present invention one the first embodiment in ultrasonic wave emission layer structural representation.
Fig. 4 is the equivalent circuit of ultrasonic wave emission layer in the ultrasonic fingerprint identification module that the embodiment of the present invention one is provided
Schematic diagram.
Fig. 5 be the embodiment of the present invention one second of embodiment in ultrasonic wave emission layer structural representation.
【Embodiment】
In order that the purpose of the present invention, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
As shown in figure 1, first embodiment of the invention provides a kind of ultrasonic fingerprint identification module 1, for identifying finger
Fingerprint, the ultrasonic fingerprint identification module 1 include ultrasonic wave emission layer 20 and ultrasonic wave receiving layer 10, the ultrasonic wave transmitting
Layer 10 is used to launch ultrasonic signal, and the ultrasonic signal of transmitting is received after handling digital reflex by the ultrasonic wave receiving layer 10,
The ultrasonic signal received using the ultrasonic wave receiving layer 10 obtains finger print information.
Wherein the position of ultrasonic wave emission layer 20 and ultrasonic wave receiving layer 10 can exchange, and refer to shown in Fig. 2.Typically
For, finger and ultrasonic fingerprint identification module 1 between be additionally provided with touch layer 2, the touch layer 2 can be display screen, glass,
Diaphragm etc., it is that ultrasonic fingerprint identifies that module 1 provides protection, extends its service life, certainly in certain embodiments
It can omit.
Also referring to Fig. 3, the ultrasonic wave emission layer 20 include it is multiple be stacked and piezoelectric membrane 201 in parallel,
Its equivalent circuit is referring to Fig. 4, equivalent to one electric capacity of each piezoelectric membrane 201.Ultrasonic fingerprint provided by the present invention is known
In other module 1, each piezoelectric membrane 201 sends ultrasonic wave so that sound field intensity is superimposed, so that working as needs to provide
During the ultrasonic wave of some strength, the demand to driving voltage can be reduced.So the design of ultrasonic fingerprint identification module 1 can be reduced
And manufacture difficulty, beneficial to industrial production；Moreover, the power consumption of ultrasonic fingerprint identification module 1 is relatively low, practicality is effectively increased
Property.
For ultrasonic wave emission layer 20, following two embodiments are provided in this embodiment.
The first embodiment
Referring to Fig. 3, the ultrasonic wave emission layer 20 also includes being used to apply the multiple of driving voltage to piezoelectric membrane 201
Electrode 203.In figure 3 so that piezoelectric membrane 201 is provided with three layers as an example, i.e., described piezoelectric membrane 201 includes the first piezoelectric membrane
2011st, the second piezoelectric membrane 2012 and the 3rd piezoelectric membrane 2013, be respectively provided with each both sides of piezoelectric membrane 201 electrode 203 and
Two lateral electrodes 203 it is electrical opposite；I.e. described electrode 203 includes first electrode 2031 and second electrode 2032, first electrode
2031 be positive pole, and second electrode 2032 is negative pole.
In multiple piezoelectric membranes 201 being stacked of the ultrasonic wave emission layer 20, two neighboring piezoelectric membrane
201 polarised direction (in Fig. 3 shown in arrow) is opposite and shares the electrode 203 being arranged between the two.It is appreciated that due to phase
The polarised directions of adjacent two piezoelectric membranes 201 on the contrary, and direction of an electric field that two lateral electrodes 203 are provided also on the contrary, can cause
Launched ultrasonic signal is consistent, so as to linearly strengthen.
Second of embodiment
Referring to Fig. 5, second of embodiment is with the first embodiment difference, the pole of each piezoelectric membrane 201
It is identical (in Fig. 5 shown in arrow) to change direction.That is, multiple pressures being stacked of the ultrasonic wave emission layer 20
The polarised direction of conductive film 201 is identical, and separation layer 205 is set between two neighboring piezoelectric membrane 201, and each electrode 203 is only
Act on a piezoelectric membrane 201.
In this embodiment, each piezoelectric membrane 201 and the electrode 203 of both sides form a unit, and each piezoelectricity is thin
It is consistent that film 201 launches ultrasonic signal, and makes electrically to completely cut off between unit by separation layer 205, so as to which multiple ultrasonic waves are believed
Linear enhancing is realized in number superposition.
Above two embodiment is compared, in the first embodiment, due to separation layer 205 need not be set, thus it is thick
Spending relatively low can more meet the needs of product is lightening；In second of embodiment, the structure of each unit is consistent with electrical relationship,
More conducively mass produce.
In some preferred embodiments, the layer number of the piezoelectric membrane 201 of the ultrasonic wave emission layer 20 is 2-4.Can
To understand, with the increase of layer number, it is better to reduce the effect of driving voltage, but its thickness is consequently increased, therefore when pressure
When the layer number of conductive film 201 is 2-4, driving voltage can be effectively reduced, moreover it is possible to so that the thickness of ultrasonic wave emission layer 20
It is smaller.
Preferably, the piezoelectric membrane 201 is to polarize to be formed by the way of original position is polarized.Specifically, the piezoelectricity is thin
Film 201 includes relative first surface and second surface, and the first surface potential for making the piezoelectric membrane 201 is zero；In the pressure
The top of the second surface of conductive film 201 provides the first electric field and the second electric field, and the potential of the first electric field is higher than the second electric field
Potential；The environmental gas above the piezoelectric membrane 201 is ionized in the presence of the first electric field, the environmental gas is electric through second
And be gathered in the second surface of piezoelectric membrane 201, make to be formed in the piezoelectric membrane 201 electric along the film in film thickness direction
, polarization is carried out to the piezoelectric membrane 201 and forms the piezoelectric membrane 201.
Can be using mode shapes such as chemical vapor deposition, physical vapour deposition (PVD), plasma sputterings in actual production
Into piezoelectric membrane 201.In the prior art, piezoelectric membrane 201 is glued typically by existing finished product is purchased by one layer of tack coat
It is attached on matrix to be polarized, generally, the piezoelectric layer thickness that such a method is formed is not suitable with existing electronics more than 30 μm
The frivolous development trend of device, and module is identified using the ultrasonic fingerprint of this piezoelectric layer, because piezoelectric layer is too thick, therefore
Resolution ratio is relatively low.And piezoelectric membrane 201 provided by the invention is by the way of being formed in situ, therefore very thin thickness, and formed
Technique is simple, so as to reduce the transmission loss of ultrasonic signal, is advantageous to improve the fingerprint recognition of ultrasonic fingerprint identification module 1
Resolution ratio.Furthermore the present invention sets electrode compared to the upper and lower surface directly in piezoelectric membrane 201, will not make piezoelectric membrane
201 directly bear applied high voltage electric field, are avoided that piezoelectric membrane 201 is breakdown.The present invention can using plasma polarization
The polarization of (Chinese patent application that for details, reference can be made to Application No. 201710108374.9) or X ray (for details, reference can be made to application number
Chinese patent application for 201611222575.3) mode form the piezoelectric membrane 201, the piezoelectric membrane 201 formed
It can accomplish very thin, its thickness is less than 30 μm, and may further be less than 9 μm.Moreover, should piezoelectric membrane 201 piezoelectricity effect
Preferably and service life length it should can be good at being useful in ultrasonic fingerprint identification module 1, beneficial to realizing ultrasonic fingerprint
Identify 1 preferable recognition effect of module.In the present invention, the piezo-electric effect D of the piezoelectric membrane 201 of polarization in situ has been carried out33
Scope be 20-35pC/N.
The material of the piezoelectric membrane 201 is piezoelectric, specific to can be selected but be not limited to：Kynoar, polychlorostyrene second
Alkene, poly-γ-methyl-L-glutamate, one or several kinds of combinations in makrolon, polyvinylidene fluoride copolymer.
In some preferred embodiments, the copolymer of the material selection Kynoar of the piezoelectric membrane 201 is poly-
Vinylidene-trifluoro-ethylene copolymer, in order to obtain the preferable piezoelectric membrane 201 of piezo-electric effect, the Kynoar and three
The scope of the mass ratio of PVF is (60-95)：(5-30), it is preferable that the scope of its mass ratio is (75-86)：(15-25),
It is further preferred that its mass ratio is 80：20, the Kynoar and trifluoro-ethylene copolymer more individually select polyvinylidene fluoride
Alkene can reduce cost, and it also has preferable piezo-electric effect.
Second embodiment of the invention provides a kind of electronic equipment, and it includes the ultrasonic fingerprint provided in first embodiment
Module is identified, electronic equipment provided by the present invention, there is the advantages of power consumption is low.
Compared with prior art, a kind of ultrasonic fingerprint identification module provided by the present invention, ultrasonic wave emission layer include
Multiple to be stacked and piezoelectric membrane in parallel, each piezoelectric membrane sends ultrasonic wave so that sound field intensity is superimposed, from
And, when needing to provide the ultrasonic wave of some strength, the demand to driving voltage can be reduced.So ultrasonic wave can be reduced to refer to
Line identifies the design and manufacture difficulty of module, beneficial to industrial production；Moreover, the ultrasonic fingerprint identification module power consumption compared with
It is low, effectively increase practicality.
It is further that the ultrasonic wave emission layer also includes being used for the multiple electricity for applying driving voltage to piezoelectric membrane
Pole；The polarised direction of multiple piezoelectric membranes being stacked of the ultrasonic wave emission layer is identical, and two neighboring piezoelectricity
Separation layer is set between film, and each electrode acts only on a piezoelectric membrane.Each piezoelectric membrane and the electrode of both sides are formed
One unit, the structure of each unit is consistent with electrical relationship, more conducively mass produces.Or the ultrasonic wave emission layer
Also include being used for the multiple electrodes for applying driving voltage to piezoelectric membrane；The multiple of the ultrasonic wave emission layer described are stacked
Piezoelectric membrane in, the polarised direction of two neighboring piezoelectric membrane is opposite and shares the electrode being arranged between the two.Due to not
Need to set separation layer, thus thickness is relatively low can more meet the needs of product is lightening.
It is further that the layer number of the piezoelectric membrane of the ultrasonic wave emission layer is 2-4.When the layer of piezoelectric membrane 201
When quantity is 2-4, driving voltage can be effectively reduced, moreover it is possible to so that the thickness of ultrasonic wave emission layer is smaller.
It is further that the piezoelectric membrane is formed by way of original position is polarized.The piezoelectric membrane has thickness low-quality
Measured advantage.
It is further that the material of the piezoelectric membrane is Kynoar, polyvinyl chloride, poly- γ-methyl-L- paddy ammonia
Acid esters, makrolon or polyvinylidene fluoride copolymer, there is higher piezoelectric constant.The piezoelectric constant d of the piezoelectric membrane33
For 20-35pC/N.
It is further that the thickness of the piezoelectric membrane is less than 30 μm, can meet the lightening demand of product well.And
And the thickness of the piezoelectric membrane can further be less than 9 μm.
The present invention also provides a kind of electronic equipment, and it includes above-mentioned ultrasonic fingerprint identification module, has power consumption low
The advantages of.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all originals in the present invention
Any modification made within then, equivalent substitution and improvement etc. all should be included within protection scope of the present invention.
Claims (10)
1. a kind of ultrasonic fingerprint identifies module, for identifying the fingerprint of finger, it is characterised in that：The ultrasonic fingerprint identification
Module includes ultrasonic wave emission layer and ultrasonic wave receiving layer, and the ultrasonic wave emission layer is used to launch ultrasonic signal, transmitting
Ultrasonic signal is received after handling digital reflex by the ultrasonic wave receiving layer, the ultrasound received using the ultrasonic wave receiving layer
Ripple signal acquisition finger print information, the ultrasonic wave emission layer include multiple be stacked and piezoelectric membrane in parallel.
2. ultrasonic fingerprint as claimed in claim 1 identifies module, it is characterised in that：The ultrasonic wave emission layer also includes using
In the multiple electrodes for applying driving voltage to piezoelectric membrane；Multiple piezoelectricity for being stacked of the ultrasonic wave emission layer are thin
The polarised direction of film is identical, and separation layer is set between two neighboring piezoelectric membrane, and it is thin that each electrode acts only on a piezoelectricity
Film.
3. ultrasonic fingerprint as claimed in claim 1 identifies module, it is characterised in that：The ultrasonic wave emission layer also includes using
In the multiple electrodes for applying driving voltage to piezoelectric membrane；Multiple piezoelectricity for being stacked of the ultrasonic wave emission layer are thin
In film, the polarised direction of two neighboring piezoelectric membrane is opposite and shares the electrode being arranged between the two.
4. ultrasonic fingerprint as claimed in claim 1 identifies module, it is characterised in that：The piezoelectricity of the ultrasonic wave emission layer is thin
The layer number of film is 2-4.
5. ultrasonic fingerprint as claimed in claim 1 identifies module, it is characterised in that：The piezoelectric membrane is polarized by original position
Mode formed.
6. ultrasonic fingerprint as claimed in claim 5 identifies module, it is characterised in that：The material of the piezoelectric membrane is poly- inclined
PVF, polyvinyl chloride, poly-γ-methyl-L-glutamate, makrolon or polyvinylidene fluoride copolymer.
7. ultrasonic fingerprint as claimed in claim 5 identifies module, it is characterised in that：The thickness of the piezoelectric membrane is less than 30
μm。
8. ultrasonic fingerprint as claimed in claim 7 identifies module, it is characterised in that：The thickness of the piezoelectric membrane is less than 9 μ
m。
9. ultrasonic fingerprint as claimed in claim 5 identifies module, it is characterised in that：The piezoelectric constant d of the piezoelectric membrane33
For 20-35pC/N.
10. a kind of electronic equipment, it is characterised in that：Mould is identified including the ultrasonic fingerprint as described in claim any one of 1-9
Group.
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| CN201710665982.XA CN107451572B (en) | 2017-08-07 | 2017-08-07 | Ultrasonic fingerprint identification module and electronic equipment |
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|---|---|---|---|
| CN201710665982.XA CN107451572B (en) | 2017-08-07 | 2017-08-07 | Ultrasonic fingerprint identification module and electronic equipment |
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| CN107451572B CN107451572B (en) | 2020-07-03 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108073919A (en) * | 2018-02-28 | 2018-05-25 | 惠州Tcl移动通信有限公司 | Ultrasonic fingerprint acquisition precision control process method, storage medium and mobile terminal |
| CN108389958A (en) * | 2018-01-24 | 2018-08-10 | 业成科技（成都）有限公司 | Ultrasonic activation element and ultrasonic sensor |
| CN108647673A (en) * | 2018-07-10 | 2018-10-12 | 深圳市本地传感科技有限公司 | A kind of touch-control, fingerprint and the three-in-one identifying system of pressure and electronic equipment |
| CN110399852A (en) * | 2019-07-30 | 2019-11-01 | Oppo广东移动通信有限公司 | The control method and Related product of ultrasonic wave mould group |
| WO2020215628A1 (en) * | 2019-04-26 | 2020-10-29 | 武汉华星光电技术有限公司 | Self-sounding display device |
| CN112507761A (en) * | 2019-09-16 | 2021-03-16 | 京东方科技集团股份有限公司 | Fingerprint identification module, driving method thereof and display device |
| CN113343800A (en) * | 2021-05-25 | 2021-09-03 | 电子科技大学 | Fingerprint touch identification module, fingerprint touch identification method and electronic equipment |
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