CN221405995U - Light test circuit and system of fingerprint module - Google Patents
Light test circuit and system of fingerprint module Download PDFInfo
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- CN221405995U CN221405995U CN202322513139.3U CN202322513139U CN221405995U CN 221405995 U CN221405995 U CN 221405995U CN 202322513139 U CN202322513139 U CN 202322513139U CN 221405995 U CN221405995 U CN 221405995U
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 239000003990 capacitor Substances 0.000 claims description 48
- 239000003381 stabilizer Substances 0.000 claims description 12
- 230000002457 bidirectional effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a lamplight test circuit and a lamplight test system of a fingerprint module, wherein the lamplight test circuit comprises: the control chip circuit, the current detection circuit and the photoelectric acquisition circuit; the control chip circuit is respectively connected with the current detection circuit, the photoelectric acquisition circuit and the fingerprint module; the fingerprint module is respectively connected with the current detection circuit; and the LED lamp of the fingerprint module is opposite to the photoelectric acquisition circuit. According to the utility model, the working current of the fingerprint module is collected through the current detection circuit and converted into a current signal, the light data of the fingerprint module is collected through the photoelectric collection circuit and converted into a voltage signal, and the voltage signal and the current signal are displayed through the control chip circuit, so that a user can judge the operating state of the light of the fingerprint module by reading the voltage signal and the current signal. According to the utility model, based on the working light and the working current of the fingerprint module, the detection of the fingerprint module light is carried out from two dimensions, so that the accuracy of the fingerprint module light detection is improved.
Description
Technical Field
The utility model relates to the field of production detection, in particular to a lamplight test circuit and system of a fingerprint module.
Background
The light of the fingerprint module is tested on a common production line and the color and the on-off of the RGB lamp are identified by naked eyes, so that the problem of false detection caused by missed detection is easy to occur in manual detection.
Therefore, a testing circuit of a fingerprint module is needed to solve the problem of missing detection during the light detection of the fingerprint module.
Disclosure of utility model
The embodiment of the utility model provides a lamplight test circuit and a lamplight test system for a fingerprint module, which are used for improving the lamplight detection accuracy of the fingerprint module.
In order to solve the above problems, an embodiment of the present utility model provides a light test circuit of a fingerprint module, including: the control chip circuit, the current detection circuit and the photoelectric acquisition circuit;
The control chip circuit is respectively connected with the current detection circuit, the photoelectric acquisition circuit and the fingerprint module;
The fingerprint module is respectively connected with the current detection circuit;
and the LED lamp of the fingerprint module is opposite to the photoelectric acquisition circuit.
As an improvement of the above scheme, the method further comprises: the power management module and the direct current power supply;
the direct-current power supply is connected with the power supply management module;
The power management module is respectively connected with the current detection circuit and the control chip circuit.
As an improvement of the scheme, the serial port of the control chip circuit is connected with the serial port of the fingerprint module; the serial port is used for transmitting serial port communication control instructions.
As an improvement of the above-described aspect, the current detection circuit includes: a first capacitor and a first resistor;
The first end of the first capacitor is respectively connected with the first end of the first resistor, the fingerprint module and the control chip circuit;
the second end of the first capacitor and the second end of the first resistor are grounded respectively.
As an improvement of the above-mentioned scheme, the photoelectric acquisition circuit includes: the photoelectric sensor, the second resistor and the third resistor;
The first end of the photoelectric sensor is respectively connected with the first end of the second resistor and the first end of the third resistor;
The second end of the second resistor is connected with a voltage source;
The second end of the third resistor is in circuit connection with the control chip;
the second end of the photoelectric sensor is grounded.
As an improvement of the above solution, the power management module includes: the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor and the voltage stabilizer;
The first end of the second capacitor is connected with the first end of the third capacitor and the fingerprint module respectively;
the first end of the third capacitor is connected with the first end of the voltage stabilizer;
the first end of the fourth capacitor is connected with the first end of the fifth capacitor and the second end of the voltage stabilizer respectively;
the second end of the second capacitor, the second end of the third capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor and the third end of the voltage stabilizer are respectively grounded.
As an improvement of the above-mentioned scheme, the dc power supply includes: the output source is connected with the first resistor and the second resistor;
the first end of the fourth resistor is respectively connected with the first end of the bidirectional diode, the first end of the output source and the second end of the voltage stabilizer; the second end of the fourth resistor is connected with the first end of the fifth resistor;
the second end of the fifth resistor, the second end of the bidirectional diode and the second end of the output source are grounded respectively.
Correspondingly, the embodiment of the utility model also provides a lamplight test system of the fingerprint module, which comprises: fingerprint module and testing device; the testing device is applied to the lamplight testing circuit of the fingerprint module.
From the above, the utility model has the following beneficial effects:
The utility model provides a lamplight test circuit of a fingerprint module, which comprises: the control chip circuit, the current detection circuit and the photoelectric acquisition circuit; the control chip circuit is respectively connected with the current detection circuit, the photoelectric acquisition circuit and the fingerprint module; the fingerprint module is respectively connected with the current detection circuit; and the LED lamp of the fingerprint module is opposite to the photoelectric acquisition circuit. According to the utility model, the working current of the fingerprint module is collected through the current detection circuit and converted into a current signal, the light data of the fingerprint module is collected through the photoelectric collection circuit and converted into a voltage signal, and the voltage signal and the current signal are displayed through the control chip circuit, so that a user can judge the operating state of the light of the fingerprint module by reading the voltage signal and the current signal. According to the utility model, based on the working light and the working current of the fingerprint module, the detection of the fingerprint module light is carried out from two dimensions, so that the accuracy of the fingerprint module light detection is improved.
Drawings
FIG. 1 is a schematic diagram of a light test circuit of a fingerprint module according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a light test system of a fingerprint module according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a control chip circuit according to an embodiment of the utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of a light test circuit of a fingerprint module according to an embodiment of the present utility model, as shown in fig. 1, the embodiment includes: a control chip circuit 101, a current detection circuit 102 and a photoelectric acquisition circuit 103;
The control chip circuit is respectively connected with the current detection circuit, the photoelectric acquisition circuit and the fingerprint module 104;
The fingerprint module is respectively connected with the current detection circuit;
and the LED lamp of the fingerprint module is opposite to the photoelectric acquisition circuit.
In one embodiment, the fingerprint module may be an XTL0901 fingerprint module.
As an improvement of the above scheme, the method further comprises: a power management module 105 and a dc power supply 106;
the direct-current power supply is connected with the power supply management module;
The power management module is respectively connected with the current detection circuit and the control chip circuit.
As an improvement of the scheme, the serial port of the control chip circuit is connected with the serial port of the fingerprint module; the serial port is used for transmitting serial port communication control instructions.
In a specific embodiment, the fingerprint module may perform the lighting of the LED lamp in the module by the operation of the fingerprint module by the tester.
In a specific embodiment, the fingerprint module may send a control command to the fingerprint module through the serial port by using the control chip circuit, so that each LED lamp is turned on one by one.
As an improvement of the above-described aspect, the current detection circuit includes: a first capacitor C1 and a first resistor R1;
The first end of the first capacitor C1 is respectively connected with the first end of the first resistor R1, the fingerprint module and the control chip circuit;
The second end of the first capacitor C1 and the second end of the first resistor R1 are grounded respectively.
In a specific embodiment, the current detection circuit is connected in series to the power supply pin of the fingerprint module, and the working current of the fingerprint module is different when the LED lamp is turned on or off, so that the current signal collected by the current detection circuit can reflect whether the LED works.
As an improvement of the above-mentioned scheme, the photoelectric acquisition circuit includes: the photoelectric sensor G1, the second resistor R2 and the third resistor R3;
The first end of the photoelectric sensor G1 is respectively connected with the first end of the second resistor R2 and the first end of the third resistor R3;
The second end of the second resistor R2 is connected with a voltage source VCC_3.3V;
The second end of the third resistor R3 is in circuit connection with the control chip;
the second end of the photoelectric sensor G1 is grounded.
As an improvement of the above solution, the power management module includes: a second capacitor C33, a third capacitor C34, a fourth capacitor C32, a fifth capacitor C10, and a voltage regulator U6;
The first end of the second capacitor C33 is connected with the first end of the third capacitor C34 and the fingerprint module respectively;
The first end of the third capacitor C34 is connected with the first end of the voltage stabilizer U6;
the first end of the fourth capacitor C32 is connected to the first end of the fifth capacitor C10 and the second end of the voltage regulator U6, respectively;
The second end of the second capacitor C33, the second end of the third capacitor C34, the second end of the fourth capacitor C32, the second end of the fifth capacitor C10 and the third end of the voltage regulator U6 are grounded respectively.
As an improvement of the above-mentioned scheme, the dc power supply includes: a fourth resistor R26, a fifth resistor R27, a bidirectional diode ESD and an output source J1;
the first end of the fourth resistor R26 is respectively connected with the first end of the bidirectional diode ESD, the first end of the output source J1 and the second end of the voltage stabilizer U6; the second end of the fourth resistor R26 is connected with the first end of the fifth resistor R27;
A second terminal of the fifth resistor R27, a second terminal of the bidirectional diode ESD, and a second terminal of the output source J1 are respectively grounded.
In a specific embodiment, the embodiment can be provided with a photoelectric sensor at a place corresponding to the LED of each fingerprint module, and the photoelectric sensor is used for sensing the on/off of the LED lamp and converting the light information into voltage information.
In a specific embodiment, referring to fig. 3, the control chip circuit is configured in a manner that is common to existing chips, and does not affect the novelty of the present utility model.
In a specific embodiment, the on/off of the LED lamp is determined by determining current information and voltage information collected by the control chip circuit. For example: when the testing device controls the fingerprint module to light the red LED lamp, the working current of the fingerprint module can be increased and stabilized at a threshold value to generate a current signal, and the corresponding photoelectric sensor on the LED lamp generates a voltage signal after being illuminated, so that the red LED lamp is known to be lighted by judging the related data of the current signal and the voltage signal collected by the control chip circuit: if the LED lamp is not on after the instruction is sent, the working current is not changed (no current signal is generated, the current is 0), and the photoelectric sensor also does not have the output of an induced voltage signal (no voltage signal is generated, the voltage is 0), so that the connection of the LED lamp can be judged to have faults; if the LED lamp is not on after the instruction is sent, the photoelectric sensor does not have an induced voltage signal output (does not generate a voltage signal, and the voltage is 0), but the working current is changed (generates a current signal, and the current is not 0), so that the fault of the filament of the LED lamp can be judged.
Accordingly, referring to fig. 2, fig. 2 is a schematic structural diagram of a light testing system of a fingerprint module according to an embodiment of the present utility model, including: a fingerprint module 104 and a testing device 202; the testing device is applied to the lamplight testing circuit of the fingerprint module.
The embodiment comprises the following steps: the control chip circuit, the current detection circuit and the photoelectric sensor; the control chip circuit is respectively connected with the current detection circuit, the photoelectric sensor and the fingerprint module; the fingerprint module is respectively connected with the current detection circuit and the photoelectric sensor. According to the utility model, the working current of the fingerprint module is collected through the current detection circuit and converted into a current signal, the light data of the fingerprint module is collected through the photoelectric sensor and converted into a voltage signal, and the voltage signal and the current signal are displayed through the control chip circuit, so that a user can judge the running state of the light of the fingerprint module by reading the voltage signal and the current signal. According to the utility model, based on the working light and the working current of the fingerprint module, the detection of the fingerprint module light is carried out from two dimensions, so that the accuracy of the fingerprint module light detection is improved.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the utility model, such changes and modifications are also intended to be within the scope of the utility model.
Claims (8)
1. The utility model provides a light test circuit of fingerprint module, its characterized in that includes: the control chip circuit, the current detection circuit and the photoelectric acquisition circuit;
The control chip circuit is respectively connected with the current detection circuit, the photoelectric acquisition circuit and the fingerprint module;
The fingerprint module is respectively connected with the current detection circuit;
and the LED lamp of the fingerprint module is opposite to the photoelectric acquisition circuit.
2. The light testing circuit of a fingerprint module as set forth in claim 1, further comprising: the power management module and the direct current power supply;
the direct-current power supply is connected with the power supply management module;
The power management module is respectively connected with the current detection circuit and the control chip circuit.
3. The light test circuit of the fingerprint module according to claim 2, wherein the serial port of the control chip circuit is connected with the serial port of the fingerprint module; the serial port is used for transmitting serial port communication control instructions.
4. A light testing circuit for a fingerprint module as recited in claim 3, wherein said current detection circuit comprises: a first capacitor and a first resistor;
The first end of the first capacitor is respectively connected with the first end of the first resistor, the fingerprint module and the control chip circuit;
the second end of the first capacitor and the second end of the first resistor are grounded respectively.
5. The light testing circuit of the fingerprint module of claim 4, wherein the light collecting circuit comprises: the photoelectric sensor, the second resistor and the third resistor;
The first end of the photoelectric sensor is respectively connected with the first end of the second resistor and the first end of the third resistor;
The second end of the second resistor is connected with a voltage source;
The second end of the third resistor is in circuit connection with the control chip;
the second end of the photoelectric sensor is grounded.
6. The light testing circuit of claim 5, wherein the power management module comprises: the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor and the voltage stabilizer;
The first end of the second capacitor is connected with the first end of the third capacitor and the fingerprint module respectively;
the first end of the third capacitor is connected with the first end of the voltage stabilizer;
the first end of the fourth capacitor is connected with the first end of the fifth capacitor and the second end of the voltage stabilizer respectively;
the second end of the second capacitor, the second end of the third capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor and the third end of the voltage stabilizer are respectively grounded.
7. The light testing circuit of claim 6, wherein the dc power supply comprises: the output source is connected with the first resistor and the second resistor;
the first end of the fourth resistor is respectively connected with the first end of the bidirectional diode, the first end of the output source and the second end of the voltage stabilizer; the second end of the fourth resistor is connected with the first end of the fifth resistor;
the second end of the fifth resistor, the second end of the bidirectional diode and the second end of the output source are grounded respectively.
8. The utility model provides a light test system of fingerprint module, its characterized in that includes: fingerprint module and testing device; the test device is applied to the lamplight test circuit of the fingerprint module set according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322513139.3U CN221405995U (en) | 2023-09-15 | 2023-09-15 | Light test circuit and system of fingerprint module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322513139.3U CN221405995U (en) | 2023-09-15 | 2023-09-15 | Light test circuit and system of fingerprint module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221405995U true CN221405995U (en) | 2024-07-23 |
Family
ID=91930398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322513139.3U Active CN221405995U (en) | 2023-09-15 | 2023-09-15 | Light test circuit and system of fingerprint module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221405995U (en) |
-
2023
- 2023-09-15 CN CN202322513139.3U patent/CN221405995U/en active Active
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