CN218273433U - Integrated fingerprint module - Google Patents
Integrated fingerprint module Download PDFInfo
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- CN218273433U CN218273433U CN202222387174.0U CN202222387174U CN218273433U CN 218273433 U CN218273433 U CN 218273433U CN 202222387174 U CN202222387174 U CN 202222387174U CN 218273433 U CN218273433 U CN 218273433U
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Abstract
The utility model relates to a fingerprint identification technical field provides an integration fingerprint module, including fingerprint collection unit, fingerprint identification unit and base plate, still include first interface J1 and second interface J7, the fingerprint collection unit sets up at the base plate openly, the fingerprint identification unit sets up at the base plate reverse side, the fingerprint collection unit includes fingerprint sensor U4, the fingerprint identification unit includes treater U3, fingerprint sensor U4 is used for gathering the fingerprint, fingerprint sensor U4 connects treater U3's input, treater U3's output is through first interface J1 or second interface J7 connection control terminal. Through above-mentioned technical scheme, the problem that fingerprint module uses inconveniently among the prior art, the circuit is complicated and bulky has been solved.
Description
Technical Field
The utility model relates to a fingerprint identification technical field, it is specific, relate to integration fingerprint module.
Background
Fingerprint identification is a method which is more advanced and widely used. Fingerprint identification refers to scanning a fingerprint of a user through a fingerprint sensor to obtain image information of the user, and then performing characteristic comparison on the obtained fingerprint image information and a fingerprint of the user which is stored in advance and has related use or management authority through identification software to determine whether the current user of the fingerprint to be verified has the related authority or not. Because the fingerprint of each person is unique, the fingerprint identification and authentication method has high safety and convenient use, and can save the complicated operations of memorizing and inputting passwords.
The fingerprint module generally comprises acquisition unit and identification element, and acquisition unit is used for gathering the fingerprint, and identification element is used for verifying, saving fingerprint information. Among the current fingerprint module, acquisition unit and recognition cell are stand alone type design, and acquisition unit passes through the winding displacement and is connected with recognition cell, and this kind of fingerprint module is connected through the winding displacement and is used inconveniently, and has the problem that the circuit is complicated and bulky.
SUMMERY OF THE UTILITY MODEL
The utility model provides an integration fingerprint module has solved among the prior art problem that the fingerprint module uses inconvenience, the circuit is complicated and bulky.
The technical scheme of the utility model as follows:
integration fingerprint module, including fingerprint collection unit, fingerprint identification unit and base plate, still include first interface J1 and second interface J7, the fingerprint collection unit sets up the base plate is positive, the fingerprint identification unit sets up the base plate reverse side, the fingerprint collection unit includes fingerprint sensor U4, the fingerprint identification unit includes treater U3, fingerprint sensor U4 is used for gathering the fingerprint, fingerprint sensor U4 connects treater U3's input, treater U4's output passes through first interface J1 or second interface J7 connection control terminal.
Further, the utility model discloses in still include control circuit and wake-up circuit, control circuit includes analog switch U6, resistance R18, resistance R20 and diode D16, analog switch U6's the end of opening in usual is connected fingerprint sensor U4, analog switch U6's common port passes through resistance R18 connects analog switch U6's the end of opening in usual, analog switch U6's common port passes through resistance R20 connects fingerprint sensor U4, analog switch U6's common port is connected fingerprint sensor's metal casing, analog switch's the end of closing in usual is connected wake-up circuit, analog switch U6's power end is connected diode D16's negative pole, diode D16's positive pole is connected second interface J7.
Further, the utility model discloses in wake-up circuit includes touch chip U2, diode D2 and resistance R1, TP _ VCC power is connected to touch chip U2's power end, touch chip U2's input passes through resistance R1 connects analog switch U6's normally closed end, touch chip U2's output is connected diode D2's positive pole, diode D2's negative pole is connected second interface J7.
Further, the utility model discloses in still include switch circuit, switch circuit includes field effect transistor Q8, resistance R24, resistance R17 and two-way suppression pipe D3, TP _ VCC power is connected to field effect transistor Q8's grid, field effect transistor Q8's grid passes through resistance R17 ground connection, field effect transistor Q8's drain electrode is connected two-way suppression pipe D3's first end, two-way suppression pipe D3's second end ground connection, field effect transistor Q8's source electrode passes through resistance R24 ground connection.
The utility model discloses a theory of operation and beneficial effect do:
the utility model discloses in, fingerprint sensor U4 is used for gathering the fingerprint, then sends the fingerprint information of gathering to treater U3 with SPI bus communication mode, and fingerprint information carries out the communication through second interface J7 and control terminal after treater U3 handles, and treater U3 can save or discernment judgement processing fingerprint information. In this embodiment, two communication modes are included, one is that the second interface J7 is connected to the control terminal through an FPC flat cable; the other is that the first interface J1 is connected to the control terminal through a USB cable. Fingerprint collection unit sets up openly at the base plate, and the fingerprint identification unit sets up at the base plate reverse side, and the fingerprint collection unit is connected the fingerprint identification unit through walking the line on the base plate, has saved the winding displacement between fingerprint collection unit and the fingerprint identification unit in traditional fingerprint module, and this kind of integration system fingerprint chip packaging structure not only makes fingerprint module ultra-thinization, simplification, has better reliability and usability moreover. The integrated fingerprint module has the characteristics of small volume, simple interface, flexible product structure and the like.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a circuit diagram of the fingerprint acquisition unit of the present invention;
fig. 4 is a circuit diagram of the fingerprint recognition unit of the present invention;
fig. 5 is a circuit diagram of the control circuit of the present invention;
fig. 6 is a circuit diagram of the wake-up circuit of the present invention;
fig. 7 is a circuit diagram of the switching circuit of the present invention.
In the figure: 1. fingerprint collection unit, 2, fingerprint identification unit, 3, base plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive work, are related to the scope of the present invention.
Example 1
As shown in fig. 1-4, this embodiment provides an integrated fingerprint module, including the fingerprint collection unit, fingerprint identification unit and base plate, still include first interface J1 and second interface J7, the fingerprint collection unit sets up at the base plate openly, the fingerprint identification unit sets up at the base plate reverse side, the fingerprint collection unit includes fingerprint sensor U4, the fingerprint identification unit includes treater U3, fingerprint sensor U4 is used for gathering the fingerprint, fingerprint sensor U4 connects treater U3's input, treater U3's output is through first interface J1 or second interface J7 connection control terminal.
In this embodiment, the 2 nd pin of the fingerprint sensor U4 is connected to the 10 th pin of the processor U3 through a resistor R7; the 7 th pin of the fingerprint sensor U4 is connected with the 12 th pin of the processor U3 through a resistor R9; the 11 th pin of the fingerprint sensor U4 is connected with the 11 th pin of the processor U3 through a resistor R8; the 15 th pin of the fingerprint sensor U4 is connected with the 13 th pin of the processor U3 through a resistor R10; the 14 th pin of the fingerprint sensor U4 is connected to the 14 th pin of the processor U3 through a resistor R12.
The 22 nd pin of the processor U3 is connected with the 4 th pin of the second interface J7 through a resistor R15; the 21 st pin of the processor U3 is connected with the 11 th pin of the second interface J7 through a resistor R14; the 31 st pin of the processor U3 is connected with the 5 th pin of the second interface J7; the 30 th pin of the processor U3 is connected with the 6 th pin of the second interface J7; the 7 th pin of the processor U3 is connected with the 8 th pin of the second interface J7; the 24 th pin of the processor U3 is connected with the 9 th pin of the second interface J7 through a resistor R3; the 23 rd pin of the processor U3 is connected with the 10 th pin of the second interface J7 through a resistor R4; the 4 th pin of the processor U3 is connected with the 12 th pin of the second interface J7.
Fingerprint sensor U4 is used for gathering the fingerprint, then sends the fingerprint information of gathering to treater U3 with SPI bus communication mode, and fingerprint information carries out the communication through second interface J7 and control terminal after treater U3 handles, and treater U3 can save or discernment judgement processing fingerprint information. In this embodiment, two communication modes are included, one is that the second interface J7 is connected to the control terminal through an FPC flat cable; the other is that the first interface J1 is connected to the control terminal through a USB cable. The fingerprint collection unit sets up openly at the base plate, and the fingerprint identification unit sets up at the base plate reverse side, and in this embodiment, the base plate is two-sided PCB board, and the fingerprint collection unit is walked the line through on the PCB board and is connected the fingerprint identification unit, has saved the winding displacement between fingerprint collection unit and the fingerprint identification unit in the traditional fingerprint module, and this kind of integration system fingerprint chip packaging structure not only makes fingerprint module ultra-thin, the simplification, has better reliability and usability moreover. The integrated fingerprint module has the characteristics of small volume, simple interface, flexible product structure and the like.
As shown in fig. 5, the fingerprint sensing device further includes a control circuit and a wake-up circuit in this embodiment, the control circuit includes an analog switch U6, a resistor R18, a resistor R20 and a diode D16, a normally open end of the analog switch U6 is connected to the fingerprint sensor U4, a common end of the analog switch U6 is connected to the normally open end of the analog switch U6 through the resistor R18, a common end of the analog switch U6 is connected to the fingerprint sensor U4 through the resistor R20, a common end of the analog switch U6 is connected to the metal shell of the fingerprint sensor, a normally closed end of the analog switch is connected to the wake-up circuit, a power source end of the analog switch U6 is connected to a cathode of the diode D16, and an anode of the diode D16 is connected to the second interface J7.
In this embodiment, control circuit is used for controlling the work and the stop of integration fingerprint module. The normally open end of the analog switch U6 is connected with the 18 th pin of the fingerprint sensor U4; the common end of the analog switch U6 is connected with the 6 th pin of the fingerprint sensor U4 through a resistor R20; the anode of the diode D16 is connected to the 2 nd pin of the second interface J7. Integration fingerprint module during operation, second interface J7 passes through FPC winding displacement connection control terminal, when the 2 nd pin of second interface J7 inserts external power supply promptly, 1 foot of analog switch U6 and 4 foot switch-ons of analog switch U6, fingerprint sensor U4 shell is as the electrode, the inside touch sensor that is equipped with of fingerprint sensor U4, when someone contacts fingerprint sensor U4 shell, fingerprint sensor U4 can normally carry out the fingerprint collection, integration fingerprint module is in lasting mode this moment.
Integration fingerprint module can also work at the awakening mode, does not discern the fingerprint when fingerprint sensor U4 for a long time, and external power source disconnection, analog switch U6's 3 th pins and analog switch U6's the 4 th pin switch-on this moment get into the awakening mode. Consequently, integration fingerprint module has the characteristics of low-power consumption.
As shown in fig. 6, the wake-up circuit in this embodiment includes a touch chip U2, a diode D2, and a resistor R1, a power supply terminal of the touch chip U2 is connected to the TP _ VCC power supply, an input terminal of the touch chip U2 is connected to the normally-closed terminal of the analog switch U6 through the resistor R1, an output terminal of the touch chip U2 is connected to an anode of the diode D2, and a cathode of the diode D2 is connected to the second interface J7.
Under the awakening mode, the external power supply of the No. 2 pin of the second interface J7 is disconnected, the analog switch U6 is powered off at the moment, the third pin of the analog switch U6 is connected with the No. 4 pin of the analog switch U6, when a finger touches the shell of the fingerprint sensor U4, a new capacitor is introduced into the electrode, the total induction capacitance value is increased, and the charge measured by the receiving electrode is changed. At this time, the touch sensor inside the fingerprint sensor U4 is disconnected, and the fingerprint sensor U4 cannot collect fingerprints. When fingerprint sensor U4's shell was touched to the finger, this touch signal got into analog switch U6's 3 feet by analog switch U6's 4 feet, then got into touch chip U2's input, touch chip U2 awakens up this moment, output high level signal to second interface J7's 7 th pin, send this signal to external terminal by second interface J7's 7 th pin at last, external terminal can switch on external power supply when receiving this signal, analog switch U6's 1 foot is put through with analog switch U6's 4 feet again this moment, fingerprint sensor U4 can normally gather the fingerprint.
As shown in fig. 7, the present embodiment further includes a switching circuit, the switching circuit includes a fet Q8, a resistor R24, a resistor R17, and a bidirectional suppressor D3, a gate of the fet Q8 is connected to the TP _ VCC power supply, a gate of the fet Q8 is grounded through the resistor R17, a drain of the fet Q8 is connected to the first end of the bidirectional suppressor D3, the second end of the bidirectional suppressor D3 is grounded, and a source of the fet Q8 is grounded through the resistor R24.
In this embodiment, the integrated fingerprint module can be switched to operate in a continuous operating mode or an awake mode by turning on and off the field effect transistor Q8.
TP _ VCC power is connected to field effect transistor Q8's grid, as shown in fig. 3, when the integration fingerprint module was in continuous mode, external power supply was connected to second interface J7's 2 nd pin, and field effect transistor Q8's source is connected external power supply promptly, so field effect transistor Q8 switches on. When the field effect transistor Q8 is turned on, the TP _ VCC power supply is grounded through the resistor R24, and the TP _ VCC power supply is pulled low, which is not high enough to make the touch chip U2 operate normally, so the wake-up mode is turned off.
When integration fingerprint module was in the awakening mode, the 2 nd pin and the external power source disconnection of second interface J7, field effect transistor Q8 was ended this moment, and TP _ VCC power is connected to touch chip U2's supply terminal, and integration fingerprint module was in the awakening mode this moment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. Integration fingerprint module, including fingerprint collection unit, fingerprint identification unit and base plate, its characterized in that still includes first interface J1 and second interface J7, the fingerprint collection unit sets up the base plate is positive, the fingerprint identification unit sets up the base plate reverse side, the fingerprint collection unit includes fingerprint sensor U4, the fingerprint identification unit includes treater U3, fingerprint sensor U4 is used for gathering the fingerprint, fingerprint sensor U4 connects treater U3's input, treater U4's output passes through first interface J1 or second interface J7 connection control terminal.
2. The integrated fingerprint module of claim 1, further comprising a control circuit and a wake-up circuit, wherein the control circuit comprises an analog switch U6, a resistor R18, a resistor R20 and a diode D16, a normally open end of the analog switch U6 is connected to the fingerprint sensor U4, a common terminal of the analog switch U6 is connected to a normally open end of the analog switch U6 through the resistor R18, a common terminal of the analog switch U6 is connected to the fingerprint sensor U4 through the resistor R20, a common terminal of the analog switch U6 is connected to the metal housing of the fingerprint sensor, a normally closed terminal of the analog switch is connected to the wake-up circuit, a power supply terminal of the analog switch U6 is connected to a cathode of the diode D16, and an anode of the diode D16 is connected to the second interface J7.
3. The integrated fingerprint module of claim 2, wherein the wake-up circuit comprises a touch chip U2, a diode D2 and a resistor R1, wherein a power supply terminal of the touch chip U2 is connected to a TP _ VCC power supply, an input terminal of the touch chip U2 is connected to a normally closed terminal of the analog switch U6 through the resistor R1, an output terminal of the touch chip U2 is connected to an anode of the diode D2, and a cathode of the diode D2 is connected to the second interface J7.
4. The integrated fingerprint module of claim 1, further comprising a switch circuit, wherein the switch circuit comprises a fet Q8, a resistor R24, a resistor R17, and a bidirectional suppressor D3, a gate of the fet Q8 is connected to a TP _ VCC power supply, a gate of the fet Q8 is grounded through the resistor R17, a drain of the fet Q8 is connected to a first end of the bidirectional suppressor D3, a second end of the bidirectional suppressor D3 is grounded, and a source of the fet Q8 is grounded through the resistor R24.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222387174.0U CN218273433U (en) | 2022-09-05 | 2022-09-05 | Integrated fingerprint module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222387174.0U CN218273433U (en) | 2022-09-05 | 2022-09-05 | Integrated fingerprint module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218273433U true CN218273433U (en) | 2023-01-10 |
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ID=84710997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222387174.0U Active CN218273433U (en) | 2022-09-05 | 2022-09-05 | Integrated fingerprint module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218273433U (en) |
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2022
- 2022-09-05 CN CN202222387174.0U patent/CN218273433U/en active Active
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