CN206684749U - Fingerprint recognition module and device - Google Patents
Fingerprint recognition module and device Download PDFInfo
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- CN206684749U CN206684749U CN201720086260.4U CN201720086260U CN206684749U CN 206684749 U CN206684749 U CN 206684749U CN 201720086260 U CN201720086260 U CN 201720086260U CN 206684749 U CN206684749 U CN 206684749U
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Abstract
A kind of fingerprint recognition module and device are the utility model is related to, ground protection unit ground connection simultaneously can contact user prior to fingerprint sensor when user presses fingerprint sensor, electrostatic is conducted to greatly.Fingerprint sensor is connected with controller.The input of esd detection circuit is connected with ground protection unit, and the output end of esd detection circuit is connected with controller.Esd detection circuit be used for by the detection of ground protection unit because of static discharge the high voltage ringing and caused by, and testing result is sent to controller.Controller is used to be controlled the fingerprint sensor according to the testing result.In the fingerprint recognition module and device; controller can find high voltage ringing in time by esd detection circuit; and then by controlling fingerprint sensor, avoid fingerprint sensor that latch-up occurs to take corresponding safeguard measure, so as to improve the service life of fingerprint recognition module.
Description
Technical field
Fingerprint identification technology field is the utility model is related to, more particularly to a kind of fingerprint recognition module and device.
Background technology
Personal identification is identified using the fingerprint characteristic of human body for fingerprint recognition, in all biological identification technologies,
It is presently the most ripe, most widely used biological identification technology, has begun to be widely used in various electronic equipments, such as
The intelligent terminals such as mobile phone, gate inhibition's security device etc..Image-forming principle based on fingerprint identification technology, in order to produce fingerprint image,
The finger of people is needed fully to be contacted with fingerprint sensor surface, so that fingerprint sensor is highly susceptible to static discharge
The influence of (ESD, Electro-Static discharge).Particularly weather is relatively dry, humidity be less than 60% environment
Under, static discharge phenomenon is even more serious because people using fingerprint recognition module when, during pressing be often first when
Between and first point first touch fingerprint sensor, and static discharge voltage now can be very high, the electrostatic of this human contact's formula
Discharge voltage is possible to that 1 kilovolt to 8 kilovolts can be reached, so as to cause very big injury to fingerprint recognition module.If fingerprint
Identification module is made not enough in place to the safeguard measure of static discharge phenomenon, it is most likely that infringement fingerprint recognition module and other biographies
Sensor device, so as to cause disabler.As can be seen here, a kind of reliable static discharge detection and protection circuit are designed in fingerprint
Become particularly important in the application of identification technology.
As shown in figure 1, be a kind of common fingerprint recognition modular structure figure, including fingerprint sensor 10 and ground loop 20
(Ring/Bezel), the wherein material of ground loop is using metal material, during normal use, in order to strengthen fingerprint recognition module
Electrostatic discharge (ESD) protection characteristic and effectively reduce fingerprint image noise, ground loop needs to be grounded.When finger is pressed into fingerprint sensing
During device, ground loop can be touched first, and now static electricity on human body can be released to the earth by ground loop, be passed so as to play protection fingerprint
The effect of sensor.In addition, being introduced into for ground loop also causes parasitic RC circuits in circuit be present, in the parasitic RC circuits,
Resistance R1 is the resistance for being equivalent to ground loop ground connection, and its resistance sizes depends on ground loop electric conductivity, ground loop and FPC
Between the size of area of (Flexible Printed Circuit, flexible PCB) ground wire windowing contact, adhesive rings and FPC
Conductive material etc. is relevant.Wherein, FPC refers to for the FPC where fingerprint recognition module.Electric capacity C1 is then between ground loop and FPC
Parasitic capacitance.The design production requirement of general fingerprint recognition module is the Ω of R1≤10, to electric capacity C1 at present without particular/special requirement.
However, in actual applications, the finger of people touches ground loop and had when forming the situation in static discharge loop
Occur, if static discharge loop is undesirable, plus the parasitic RC circuits formed in circuit, now there is pole near fingerprint sensor
Probably due to high voltage electrostatic discharge and produce high voltage ring (Ringing) phenomenon, as shown in Fig. 2 high voltage ringing voltage after
And cause latch-up (latch up) occurs inside fingerprint sensor again.Once there is latch-up in fingerprint sensor, its work
Exception then occurs, operating current can become big, so as to cause fingerprint sensor therefore to fail even and occur permanently
Damage.
Utility model content
Based on this, it is necessary to which the fingerprint sensor for identifying module for conventional fingerprint occurs abnormal ask because of latch-up
Topic, there is provided a kind of fingerprint recognition module and device.
A kind of fingerprint recognition module, including fingerprint sensor, ground protection unit and controller；The ground protection unit
Ground connection, and the ground protection unit can contact institute when user presses the fingerprint sensor prior to the fingerprint sensor
User is stated, electrostatic is conducted to greatly；The fingerprint sensor is connected with the controller；The fingerprint recognition module also wraps
Include esd detection circuit；The input of the esd detection circuit is connected with the ground protection unit, and the esd detection circuit
Output end be connected with the controller；
The esd detection circuit is for by ground protection unit detection, because of static discharge, the high voltage and caused by shake
Bell phenomenon, and testing result is sent to the controller；The controller is used for according to the testing result to the fingerprint
Sensor is controlled.
In one of the embodiments, the esd detection circuit includes ringing voltage induction of signal unit and interface protection
Unit；The input of the ringing voltage induction of signal unit is the input of the esd detection circuit, the ringing voltage letter
The output end of number sensing unit is grounded by the interface protection unit；The ringing voltage induction of signal unit and the interface
The common port of protection location is the output end of the esd detection circuit；
The ringing voltage induction of signal unit be used for by way of coupling come sense in the ground protection unit by
Ringing voltage signal caused by the static discharge phenomenon, and by the ringing voltage signal output of sensing to the control
Device；The interface protection unit is used to carry out electrostatic protection to the controller.
In one of the embodiments, the ringing voltage induction of signal unit includes electric capacity.
In one of the embodiments, the interface protection unit includes TVS diode.
In one of the embodiments, the ground protection unit includes ground loop.
A kind of fingerprint identification device, for being connected with controller；The fingerprint identification device includes fingerprint sensor and connect
Ground protection location；The ground protection unit ground connection, and the ground protection unit can press the fingerprint sensing in user
The user is contacted prior to the fingerprint sensor during device, electrostatic is conducted to greatly；The fingerprint sensor and the control
Device connection processed；The fingerprint identification device also includes esd detection circuit；The input of the esd detection circuit and the ground connection
Protection location is connected, and the output end of the esd detection circuit is connected with the controller；
The esd detection circuit is for by ground protection unit detection, because of static discharge, the high voltage and caused by shake
Bell phenomenon, and testing result is sent to the controller；The controller is used for according to the testing result to the fingerprint
Sensor is controlled.
In one of the embodiments, the esd detection circuit includes ringing voltage induction of signal unit and interface protection
Unit；The input of the ringing voltage induction of signal unit is the input of the esd detection circuit, the ringing voltage letter
The output end of number sensing unit is grounded by the interface protection unit；The ringing voltage induction of signal unit and the interface
The common port of protection location is the output end of the esd detection circuit；
The ringing voltage induction of signal unit be used for by way of coupling come sense in the ground protection unit by
Ringing voltage signal caused by the static discharge phenomenon, and by the ringing voltage signal output of sensing to the control
Device；The interface protection unit is used to carry out electrostatic protection to the controller.
In one of the embodiments, the ringing voltage induction of signal unit includes electric capacity.
In one of the embodiments, the interface protection unit includes TVS diode.
In one of the embodiments, the ground protection unit includes ground loop.
Above-mentioned fingerprint recognition module and device have the advantage that for：In the fingerprint recognition module and device, controller
High voltage ringing can be found in time by esd detection circuit, and then by controlling fingerprint sensor, it is corresponding to take
Safeguard measure come avoid fingerprint sensor occur latch-up, so as to improve the service life of fingerprint recognition module.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, can also be according to the accompanying drawing of these accompanying drawings acquisition other embodiment.
Fig. 1 is the structural representation that conventional fingerprint identifies module；
Fig. 2 is the voltage change schematic diagram of high voltage ringing；
Fig. 3 is the composition frame chart for the fingerprint recognition module that an embodiment provides；
Fig. 4 is the one of which concrete composition block diagram of the fingerprint recognition module of embodiment illustrated in fig. 3；
Fig. 5 is the one of which physical circuit figure of the fingerprint recognition module of embodiment illustrated in fig. 4.
Embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
State.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can come in fact in many different forms
It is existing, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is made to public affairs of the present utility model
Open the understanding more thorough and comprehensive of content.
Unless otherwise defined, technical field of all of technologies and scientific terms used here by the article with belonging to utility model
The implication that is generally understood that of technical staff it is identical.It is intended merely to retouch in the term used in the description of utility model herein
State the purpose of specific embodiment, it is not intended that limitation the utility model.Term as used herein "and/or" include one or
The arbitrary and all combination of multiple related Listed Items.
Fig. 3, Fig. 5 are refer to, an embodiment provides a kind of fingerprint recognition module, including fingerprint sensor 100, ground connection are protected
Protect unit 200, controller 300 and esd detection circuit 400.
Wherein, fingerprint sensor 100 is connected with controller 300.The input of esd detection circuit 400 and ground protection list
Member 200 is connected, and the output end of esd detection circuit 400 is connected with controller 300.Ground protection unit 200 is grounded, and is grounded
Protection location 200 can contact user when user presses fingerprint sensor 100 prior to fingerprint sensor 100, and electrostatic is passed
It is directed at the earth.In other words, user can touch ground protection unit 200 first when pressing with finger fingerprint sensor 100,
Fingerprint sensor 100 can just be touched afterwards so that static electricity on human body by ground protection cell conducts to greatly, to avoid
Static electricity on human body is loaded directly into causing to damage on fingerprint sensor 100.
In the utility model embodiment, fingerprint sensor 100 is made up of capacitor array, is passed when finger is put into fingerprint by user
When sensor 100 is positive, skin just constitutes a pole plate of capacitor array, and the back side of capacitor array is insulating pad.Due to not
It is unequal with the distance between the ridge of region fingerprint and paddy so that the capacitance of each unit becomes therewith, thus can be referred to
Print image.
Ground protection unit 200 can be conductive, and ground protection unit 200 can make to produce parasitic RC electricity in circuit
Road.As shown in figure 5, parasitic RC circuits include the resistance R1 and ground protection unit 200 for being equivalent to the ground connection of ground protection unit 200
Parasitic capacitance C1 between FPC.Specifically, ground protection unit 200 is ground loop.The material of the ground loop is metal material,
Also, ground loop is looped around the periphery of fingerprint sensor 100.
Esd detection circuit 400 is used to detect the high voltage ring and caused by because of static discharge by ground protection unit 200
Phenomenon, and testing result is sent to controller 300.Wherein, static discharge refers to have the object of different electrostatic potentials mutual
Electric charge transfer caused by close or direct contact.High voltage ringing is as shown in Fig. 2 the signal of high voltage ring is high frequency
Alternating current.Due to high voltage ringing be after static discharge phenomenon occurs by parasitic RC circuits caused by, therefore pass through inspection
The associated electrical parameter for surveying ground protection unit 200 can detect high voltage ringing whether occurs.
Controller 300 is used to be controlled fingerprint sensor 100 according to above-mentioned testing result.Specifically, controller 300
Judged by above-mentioned testing result after there is high voltage ringing, corresponding safeguard measure is taken to fingerprint sensor 100.Example
Such as：Controller 300 can perform after finding high voltage ringing occur and restart fingerprint sensor 100, reset fingerprint sensing
Any of both safeguard measures of device 100 or two kinds, so as to avoid that latch-up occurs.
Specifically, testing result includes effective rising edge and trailing edge, so as to as interrupt request singal
(IRQ), at this moment esd detection circuit 400 sends testing result to the interrupt signal pin of controller 300, to inform controller 300
There occurs high voltage ringing.In addition, during the use of fingerprint recognition module, fingerprint sensor 100 is not also by stopping
Ground detects finger, and the signal for including rising edge or trailing edge is sent to controller 300, to report corresponding interrupt requests to believe
Number.
In the scenario above, the signal sent to controller 300 due to esd detection circuit 400 and fingerprint sensor 100 is all
It is interrupt request singal, therefore it is esd detection circuit 400 or fingerprint sensing that controller 300, which needs to tell interrupt requests source,
Device 100.Specifically judgment mode can be：After controller 300 receives interrupt request singal, controller 300 can pass through
The value for reading and writing some setting registers detects the related operational factor of fingerprint sensor 100, so as to judging fingerprint sensor 100
Whether normal operation, if it is, judge interrupt request singal sent by fingerprint sensor 100, representative at this moment do not go out
Existing static discharge phenomenon, the fingerprint recognition module are in normal operating condition, and at this moment controller 100 is according to normal control mode
Perform (such as：Normal release)；Otherwise, it is determined that interrupt request singal is sent by esd detection circuit 400, representative occurs
High voltage ringing, at this moment controller 100 can control fingerprint sensor 100 to restart or reset, so as to eliminate breech lock in time
Effect.
To sum up, the operation principle for the above-mentioned fingerprint recognition module that the utility model embodiment provides is：When the finger of user
After touching fingerprint recognition module, if there is human body electro static discharge phenomenon, electrostatic can be let out by ground protection unit 200
The earth is put into, meanwhile, parasitic RC circuits can cause high voltage ringing.When esd detection circuit 400 detects ground protection list
After the high voltage ringing occurred in member 200, controller 300 is reported to, controller 300 confirms that there occurs high voltage ring to show
As rear, corresponding safeguard measure is taken, so as to suppress the generation of latch-up.
Therefore, in above-mentioned fingerprint recognition module, controller 300 can find high electricity in time by esd detection circuit 400
Ringing is pressed, and then by controlling fingerprint sensor 100, to take corresponding safeguard measure to avoid fingerprint sensor 100
Generation latch-up, fingerprint recognition module is allowed to recover normal work, so as to improve the service life of fingerprint recognition module.
In one of the embodiments, Fig. 4 and Fig. 5 are refer to, esd detection circuit 400 includes ringing voltage induction of signal
Unit 410 and interface protection unit 420.The input of ringing voltage induction of signal unit 410 is defeated for esd detection circuit 400
Enter end, the output end of ringing voltage induction of signal unit 410 is grounded by interface protection unit 420.Ringing voltage induction of signal
The common port of unit 410 and interface protection unit 420 is the output end of esd detection circuit 400, i.e. ringing voltage induction of signal list
Member 410 is connected with the common port of interface protection unit 420 with controller 300.
Wherein, ringing voltage induction of signal unit 410 is used for by way of coupling come in inductive grounding protection location 200
The ringing voltage signal as caused by static discharge phenomenon, and by the ringing voltage signal output of sensing to controller 300.Coupling is
Refer to exist between the input and output of two or more circuit elements or electric network etc. and be fitted close and influence each other, and
Pass through the phenomenon to interact from a lateral opposite side transmission energy.Ringing voltage signal refers to corresponding to high voltage ringing
Voltage signal.In the utility model embodiment, ringing voltage induction of signal unit 410 detects high voltage by the way of coupling
Ringing, the effect of isolation can be reached.
Specifically, refer to Fig. 5, ringing voltage induction of signal unit 410 includes electric capacity Cg.Wherein, electric capacity Cg electric capacity
Size can be 10pF.Because signal caused by high voltage ringing belongs to the alternating current of high frequency, therefore pass through Capacitance Coupled
The alternating current can be transferred to close to the side of controller 300 from electric capacity Cg close to the side pole plate of ground protection unit 200
Pole plate, and then transmit to controller 300.
It is understood that the specific implementation of ringing voltage induction of signal unit 410 is not limited to the above situation, such as
Can also increase it is some other on signal transacting device (such as：Amplifier etc.) improve controller 300 to testing result
Can identification, with improve controller 300 identify high voltage ringing accuracy.
Interface protection unit 420 is used to carry out electrostatic protection to controller 300, so as to protect the input of controller 300
Corresponding I/O mouths, the internal circuit for the controller 300 being connected with this I/O mouth and other internal devices for being connected with this I/O mouth
Part, the electrostatic that will not be introduced into are punctured.
Specifically, refer to Fig. 5, interface protection unit 420 include TVS (Transient Voltage Suppressor,
Transient state suppresses) diode.Because the characteristic that TVS diode has is：When its both ends are subjected to the high energy impact events of moment,
Impedance value between both ends can be changed into Low ESR by TVS diode with high speed from high impedance, to absorb a moment big electricity
Stream, so as to its both end voltage strangulation one it is predetermined numerically, to protect circuit element below not by high voltage transient
The impact of spike, therefore the utility model embodiment is by using TVS diode, can be to controller 300 and other phases
The circuit of pass carries out electrostatic protection.
It is understood that interface protection unit 420 can also use other kinds of ESD electrostatic protection devices, such as：
Condensate device, piezo-resistance and suppressor etc..
In another embodiment, there is provided a kind of fingerprint identification device, for being connected with controller.The fingerprint recognition dress
Put including fingerprint sensor and ground protection unit.Ground protection unit ground connection, and the ground protection unit can be
The user is contacted prior to the fingerprint sensor when user presses the fingerprint sensor, electrostatic is conducted to greatly.Institute
Fingerprint sensor is stated to be connected with the controller.The fingerprint identification device also includes esd detection circuit.The ESD detections electricity
The input on road is connected with the ground protection unit, and the output end of the esd detection circuit is connected with the controller.
The esd detection circuit is for by ground protection unit detection, because of static discharge, the high voltage and caused by shake
Bell phenomenon, and testing result is sent to the controller.The controller is used for according to the testing result to the fingerprint
Sensor is controlled.
In one of the embodiments, the esd detection circuit includes ringing voltage induction of signal unit and interface protection
Unit.The input of the ringing voltage induction of signal unit is the input of the esd detection circuit, the ringing voltage letter
The output end of number sensing unit is grounded by the interface protection unit.The ringing voltage induction of signal unit and the interface
The common port of protection location is the output end of the esd detection circuit.
The ringing voltage induction of signal unit be used for by way of coupling come sense in the ground protection unit by
Ringing voltage signal caused by the static discharge phenomenon, and by the ringing voltage signal output of sensing to the controller.Institute
Interface protection unit is stated to be used to carry out electrostatic protection to the controller.
In one of the embodiments, the ringing voltage induction of signal unit includes electric capacity.
In one of the embodiments, the interface protection unit includes TVS diode.
In one of the embodiments, the ground protection unit includes ground loop.
It should be noted that the utility model embodiment provide fingerprint identification device be related to fingerprint sensor, ground connection
Protection location, controller, esd detection circuit correspond to the fingerprint being related in the fingerprint recognition module provided with above-described embodiment respectively
Sensor 100, ground protection unit 200, controller 300, esd detection circuit 400 are identical, just repeat no more here.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of fingerprint recognition module, including fingerprint sensor, ground protection unit and controller；The ground protection unit connects
Ground, and the ground protection unit can be when user presses the fingerprint sensor prior to described in fingerprint sensor contact
User, electrostatic is conducted to greatly；The fingerprint sensor is connected with the controller；Characterized in that, the fingerprint is known
Other module also includes esd detection circuit；The input of the esd detection circuit is connected with the ground protection unit, and described
The output end of esd detection circuit is connected with the controller；
The esd detection circuit is for by ground protection unit detection, because of static discharge, the high voltage ring and caused by show
As, and testing result is sent to the controller；The controller is used for according to the testing result to the fingerprint sensing
Device is controlled.
2. fingerprint recognition module according to claim 1, it is characterised in that the esd detection circuit includes ringing voltage
Induction of signal unit and interface protection unit；The input of the ringing voltage induction of signal unit is the esd detection circuit
Input, the output end of the ringing voltage induction of signal unit is grounded by the interface protection unit；The ring electricity
Press the output end that the common port of induction of signal unit and the interface protection unit is the esd detection circuit；
The ringing voltage induction of signal unit is used to sense in the ground protection unit by described by way of coupling
Ringing voltage signal caused by static discharge phenomenon, and by the ringing voltage signal output of sensing to the controller；Institute
Interface protection unit is stated to be used to carry out electrostatic protection to the controller.
3. fingerprint recognition module according to claim 2, it is characterised in that the ringing voltage induction of signal unit includes
Electric capacity.
4. fingerprint recognition module according to claim 2, it is characterised in that the interface protection unit includes the poles of TVS bis-
Pipe.
5. the fingerprint recognition module according to any claim in Claims 1-4, it is characterised in that the ground connection is protected
Shield unit includes ground loop.
A kind of 6. fingerprint identification device, for being connected with controller；The fingerprint identification device includes fingerprint sensor and ground connection
Protection location；The ground protection unit ground connection, and the ground protection unit can press the fingerprint sensor in user
When prior to the fingerprint sensor contact the user, electrostatic is conducted to greatly；The fingerprint sensor and the control
Device connects；Characterized in that, the fingerprint identification device also includes esd detection circuit；The input of the esd detection circuit with
The ground protection unit connection, and the output end of the esd detection circuit is connected with the controller；
The esd detection circuit is for by ground protection unit detection, because of static discharge, the high voltage ring and caused by show
As, and testing result is sent to the controller；The controller is used for according to the testing result to the fingerprint sensing
Device is controlled.
7. fingerprint identification device according to claim 6, it is characterised in that the esd detection circuit includes ringing voltage
Induction of signal unit and interface protection unit；The input of the ringing voltage induction of signal unit is the esd detection circuit
Input, the output end of the ringing voltage induction of signal unit is grounded by the interface protection unit；The ring electricity
Press the output end that the common port of induction of signal unit and the interface protection unit is the esd detection circuit；
The ringing voltage induction of signal unit is used to sense in the ground protection unit by described by way of coupling
Ringing voltage signal caused by static discharge phenomenon, and by the ringing voltage signal output of sensing to the controller；Institute
Interface protection unit is stated to be used to carry out electrostatic protection to the controller.
8. fingerprint identification device according to claim 7, it is characterised in that the ringing voltage induction of signal unit includes
Electric capacity.
9. fingerprint identification device according to claim 8, it is characterised in that the interface protection unit includes the poles of TVS bis-
Pipe.
10. the fingerprint identification device according to any claim in claim 6 to 9, it is characterised in that the ground connection is protected
Shield unit includes ground loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720086260.4U CN206684749U (en) | 2017-01-22 | 2017-01-22 | Fingerprint recognition module and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720086260.4U CN206684749U (en) | 2017-01-22 | 2017-01-22 | Fingerprint recognition module and device |
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| Publication Number | Publication Date |
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| CN206684749U true CN206684749U (en) | 2017-11-28 |
Family
ID=60396320
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720086260.4U Active CN206684749U (en) | 2017-01-22 | 2017-01-22 | Fingerprint recognition module and device |
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| CN (1) | CN206684749U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106778702A (en) * | 2017-01-22 | 2017-05-31 | 深圳芯启航科技有限公司 | Fingerprint recognition module and device |
| CN110738075A (en) * | 2018-07-18 | 2020-01-31 | 敦泰电子有限公司 | fingerprint identification chips and terminal equipment |
-
2017
- 2017-01-22 CN CN201720086260.4U patent/CN206684749U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106778702A (en) * | 2017-01-22 | 2017-05-31 | 深圳芯启航科技有限公司 | Fingerprint recognition module and device |
| CN106778702B (en) * | 2017-01-22 | 2023-12-05 | 深圳芯启航科技有限公司 | Fingerprint identification module and device |
| CN110738075A (en) * | 2018-07-18 | 2020-01-31 | 敦泰电子有限公司 | fingerprint identification chips and terminal equipment |
| CN110738075B (en) * | 2018-07-18 | 2023-10-13 | 敦泰电子有限公司 | Fingerprint identification chip and terminal equipment |
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