Photoelectric fingerprint transfer printing testing device

Abstract

The utility model discloses a photoelectric fingerprint transfer printing testing device, which comprises a circuit board, a main control chip, a first optical coupler, a second optical coupler, a first lamp bead, a second lamp bead and a lamp holder, and is characterized in that the main control chip, the first optical coupler and the second optical coupler are arranged on the circuit board; and the first lamp bead and the second lamp bead are adjacently arranged on the lamp holder by adopting an integrated forming process. According to the photoelectric fingerprint transfer printing test device, through potential isolation of the optocoupler, the main control chip controls the cooperative test of the two different lamp beads, so that the test process control can be simplified, the test efficiency can be improved, the test cost can be reduced, and the user experience can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of fingerprint recognition technology, and in particular to a photoelectric fingerprint pad printing testing device. Background Art

[0002] As a mature fingerprint recognition technology, photoelectric fingerprint recognition technology has long been integrated into people's work and life. With the continuous development of fingerprint technology, fingerprint locks, fingerprint attendance machines and other fingerprint recognition devices are becoming more and more popular, which has brought great vitality to optical fingerprint recognition.

[0003] In the process of conceiving and forming this application, the applicant has found at least the following problems: At present, the photoelectric fingerprint uses a pad printing process to cover the wafer with black ink to prevent interference from external light sources. During the pad printing process, pad printing ink dots are scattered on the wafer, affecting the fingerprint image recognition function. For example, when the ultra-thin fingerprint group needs to be installed on the middle frame of the mobile phone, inkjet ink is used around the wafer to prevent light leakage around the fingerprint chip, and to prevent light leakage when the surrounding pad printing black ink is assembled. At this time, there is a phenomenon of tiny ink splashing particles when the printing rubber head is covered. The scattered particles at the micron level cannot be recognized by the naked eye, but they will affect the optical micron-level pixels and thus affect the functional realization of the fingerprint group. Therefore, those skilled in the art are in urgent need of an optoelectronic fingerprint pad printing test device to test the optoelectronic fingerprint image of the product to intercept defective products. Utility Model Content

[0004] In order to solve the above problems, the purpose of the present application is to provide a photoelectric fingerprint pad printing test device, including a circuit board, a main control chip, a first optical coupler, a second optical coupler, a first lamp bead, a second lamp bead and a lamp holder, wherein the main control chip, the first optical coupler and the second optical coupler are arranged on the circuit board, and the first lamp bead and the second lamp bead are adjacently arranged on the lamp holder by an integrated molding process;

[0005] The first output end of the main control chip is connected to the first end of the light-emitting side of the first optical coupler, and the second output end of the main control chip is connected to the first end of the light-emitting side of the second optical coupler;

[0006] The second end of the light-emitting side of the first optocoupler is connected to a first preset voltage, the first end of the light-receiving side of the first optocoupler is connected to the first end of the first lamp bead, and the second end of the light-receiving side of the first optocoupler is connected to a second preset voltage;

[0007] The second end of the light-emitting side of the second photocoupler is connected to a third preset voltage, the first end of the light-receiving side of the second photocoupler is connected to the first end of the second lamp bead, and the second end of the light-receiving side of the second photocoupler is connected to a fourth preset voltage;

[0008] The second end of the first lamp bead is connected to a fifth preset voltage, and the second end of the second lamp bead is connected to a sixth preset voltage.

[0009] Optionally, the photoelectric fingerprint pad printing testing device also includes a first connector, the first end of the light receiving side of the first optocoupler is connected to the first end of the first lamp bead through the first pin of the first connector, and the second end of the first lamp bead is connected to the fifth preset voltage through the second pin of the first connector.

[0010] Optionally, the photoelectric fingerprint pad printing testing device also includes a second connector, the first end of the light receiving side of the second optocoupler is connected to the first end of the second lamp bead through the first pin of the second connector, and the second end of the second lamp bead is connected to the sixth preset voltage through the second pin of the second connector.

[0011] Optionally, the first connector is a 2-pin connector.

[0012] Optionally, the second connector is a 3-pin connector.

[0013] Optionally, the photoelectric fingerprint pad printing testing device further includes a first resistor and a second resistor;

[0014] The first resistor is connected in series between the first output terminal of the main control chip and the first end of the light-emitting side of the first optical coupler;

[0015] The second resistor is connected in series between the second output terminal of the main control chip and the first terminal of the light-emitting side of the second optical coupler.

[0016] Optionally, the photoelectric fingerprint pad printing test device further includes a third resistor and a fourth resistor;

[0017] The third resistor is connected in series between the first end of the light-emitting side of the first optocoupler and the ground, and the fourth resistor is connected in series between the first end of the light-emitting side of the second optocoupler and the ground.

[0018] Optionally, the first input end of the main control chip is connected to the first end of the light-emitting side of the first optocoupler, and the second input end of the main control chip is connected to the first end of the light-emitting side of the second optocoupler.

[0019] Optionally, the photoelectric fingerprint pad printing testing device also includes a fifth resistor and a sixth resistor; the fifth resistor is connected in series between the first input terminal of the main control chip and the first end of the light-emitting side of the first optocoupler, and the sixth resistor is connected in series between the second input terminal of the main control chip and the first end of the light-emitting side of the second optocoupler.

[0020] Optionally, the first preset voltage and the third preset voltage are the same as the first driving voltage, and / or the second preset voltage and the fourth preset voltage are the same as the second driving voltage, and / or the fifth preset voltage and the sixth preset voltage are the same as the third driving voltage.

[0021] Optionally, the photoelectric fingerprint pad printing testing device further includes a seventh resistor, a first end of the seventh resistor is connected to the second driving voltage, and a second end of the seventh resistor is grounded.

[0022] Optionally, the photoelectric fingerprint pad printing testing device further includes a third connector;

[0023] The second end of the second lamp bead and the second end of the first lamp bead are connected to the first driving voltage through the first pin of the third connector.

[0024] Optionally, the second end of the light-receiving side of the second optical coupler and the second end of the light-receiving side of the first optical coupler are connected to the third driving voltage through the second pin of the third connector.

[0025] This application discloses the following technical effects:

[0026] In the present application, the main control chip, the first optocoupler and the second optocoupler are arranged on the circuit board, and the first lamp bead and the second lamp bead are arranged adjacent to each other on the lamp holder by using an integrated molding process. After the potential isolation of the optocoupler, the coordination test of two different lamp beads is controlled by the main control chip, which can simplify the test process control, improve test efficiency, reduce test costs, and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 Schematic diagram of circuit connection of a photoelectric fingerprint pad printing test device according to an embodiment of the present application.

[0029] Figure 2 FIG. 1 is a schematic diagram of a photoelectric pad printing test circuit connection according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0031] The present application provides a photoelectric fingerprint pad printing test device. In one embodiment, the photoelectric fingerprint pad printing test device includes a circuit board, a main control chip, a first optical coupler, a second optical coupler, a first lamp bead, a second lamp bead and a lamp holder.

[0032] The main control chip, the first optocoupler and the second optocoupler are arranged on the circuit board, and the first lamp bead and the second lamp bead are arranged adjacent to each other on the lamp holder by adopting an integrated molding process.

[0033] Figure 1 Schematic diagram of circuit connection of a photoelectric fingerprint pad printing test device according to an embodiment of the present application.

[0034] Please refer to Figure 1 The first output end of the main control chip C1 is connected to the first end of the light-emitting side of the first optical coupler Q1, and the second output end of the main control chip C1 is connected to the first end of the light-emitting side of the second optical coupler Q2.

[0035] The second end of the light-emitting side of the first optocoupler Q1 is connected to the first preset voltage V11, the first end of the light-receiving side of the first optocoupler Q1 is connected to the first end of the first lamp bead D1, and the second end of the light-receiving side of the first optocoupler Q1 is connected to the second preset voltage V12.

[0036] The second end of the light-emitting side of the second optocoupler Q2 is connected to the third preset voltage V13, the first end of the light-receiving side of the second optocoupler Q2 is connected to the first end of the second lamp bead D2, and the second end of the light-receiving side of the second optocoupler Q2 is connected to the fourth preset voltage V14.

[0037] The second end of the first lamp bead D1 is connected to a fifth preset voltage V15 , and the second end of the second lamp bead D2 is connected to a sixth preset voltage V16 .

[0038] Photoelectric fingerprints are obtained by reflecting light under the light-transmitting screen. The principle is that when the finger touches the screen, the light emitted by the OLED screen penetrates the cover plate to illuminate the fingerprint texture, and the light reflected by the fingerprint penetrates the screen to reach the sensor, and finally forms a fingerprint image for identification. In the pad printing process, the quality of pad printing depends on five main elements: 1. The sealed oil cup combines the functions of sealed storage of ink and scraping off excess ink. 2. The printing rubber head is used to transfer ink from the printing plate to the media on the surface of the product. 3. The printing plate is used to etch the printing pattern. 4. The ink is used to determine the color according to the requirements of the printed product. 5. The pad printer can perform transfer printing. When the fingerprint group needs to be installed, inkjet ink is used around the wafer to prevent light leakage around the fingerprint chip, so that the surrounding pad printing black ink is assembled to prevent light leakage. In this embodiment, through the cooperation test of the first lamp bead D1 and the second lamp bead D2, defective products can be effectively intercepted.

[0039] Exemplarily, an optocoupler is an electronic component consisting of a light-emitting diode and a phototransistor or a photodiode, which is electrically isolated between the input and output ends by optical signals. In an optocoupler, there is no electrical connection between the input and output circuits, but light is transmitted between the light-emitting diode and the phototransistor. The transfer of optical signals is achieved by the light-emitting diode emitting optical signals at the input end, which are received and converted by the phototransistor into corresponding electrical signals for use at the output end. Optocouplers have the advantages of low noise, high-speed transmission, and a wide frequency response. Since there is no electrical connection between the output and input ends, optocouplers can achieve electrical isolation, avoid feedback and noise, and protect the two parts of the circuit from interference and damage by opposing electrical signals.

[0040] For example, the first lamp bead D1 is an infrared light source lamp bead, and the second lamp bead D2 is a white light source lamp bead. Figure 1 , the first end of the first lamp bead D1 and the second lamp bead D2 may be a cathode, and the second end of the first lamp bead D1 and the second lamp bead D2 may be an anode. In other embodiments, the first end of the first lamp bead D1 and the second lamp bead D2 may be an anode, and the second end of the first lamp bead D1 and the second lamp bead D2 may be a cathode, and the corresponding driving voltage is also adjusted accordingly to drive the lamp beads to light up. This application does not limit the connection direction of the lamp beads.

[0041] In this embodiment, the first lamp bead D1 and the second lamp bead D2 are arranged adjacent to each other by integrated molding, and the two test light sources are combined into a light source of a lamp holder, so that a dedicated light source switching control system can be made accordingly, and with the optimized control software, in the photoelectric fingerprint pad printing test process, this embodiment can combine the fingerprint module pad printing test software using an infrared light source and the fingerprint module function test using a white light source into a one-stop test. The main control chip C1 controls the coordinated test work of the two lamp beads through the isolation effect of the optical coupler. Compared with the lens-type photoelectric fingerprint, it can effectively reduce the pad printing process, reduce the test time, and effectively reduce the tooling cost and labor cost.

[0042] Optionally, the photoelectric fingerprint pad printing testing device also includes a first connector, the first end of the light receiving side of the first optocoupler Q1 is connected to the first end of the first lamp bead D1 through the first pin of the first connector, and the second end of the first lamp bead D1 is connected to the fifth preset voltage V15 through the second pin of the first connector.

[0043] Optionally, the photoelectric fingerprint pad printing testing device also includes a second connector, the first end of the light receiving side of the second optocoupler Q2 is connected to the first end of the second lamp bead D2 through the first pin of the second connector, and the second end of the second lamp bead D2 is connected to the sixth preset voltage V16 through the second pin of the second connector.

[0044] Exemplarily, the first lamp bead D1 can be connected to the test circuit board through the first connector, and the second lamp bead D2 can be connected to the test circuit board through the second connector, which optimizes the connection and fixing process between the lamp holder and the circuit board and facilitates the replacement and arrangement of the test equipment.

[0045] Optionally, the first connector is a 2-pin connector. Optionally, the second connector is a 3-pin connector.

[0046] Exemplarily, by configuring the first connector and the second connector to be connectors of different specifications, incorrect connection between the lamp holder and the circuit board can be effectively avoided, thereby improving the connection efficiency and accuracy during the test process.

[0047] Figure 2 FIG. 1 is a schematic diagram of a photoelectric pad printing test circuit connection according to an embodiment of the present application.

[0048] Please refer to Figure 2 Optionally, the photoelectric fingerprint pad printing test device also includes a first resistor R1 and a second resistor R2; the first resistor R1 is connected in series between the first output end of the main control chip C1 and the first end of the light-emitting side of the first optical coupler Q1; the second resistor R2 is connected in series between the second output end of the main control chip C1 and the first end of the light-emitting side of the second optical coupler Q2.

[0049] Exemplarily, the current limiting and voltage dividing effects of the first resistor R1 and the second resistor R2 can effectively match the electrical properties between the optical coupler and the main control chip C1 to avoid damage to components.

[0050] Please refer to Figure 2 Optionally, the photoelectric fingerprint pad printing test device also includes a third resistor R3 and a fourth resistor R4; the third resistor R3 is connected in series between the first end of the light-emitting side of the first optical coupler Q1 and the ground, and the fourth resistor R4 is connected in series between the first end of the light-emitting side of the second optical coupler Q2 and the ground.

[0051] Exemplarily, by grounding the third resistor R3 and the fourth resistor R4 , the control voltage output from the main control chip C1 to the optocoupler can be effectively clamped, so that the test circuit can work stably.

[0052] Please refer to Figure 2 Optionally, the first input end of the main control chip C1 is connected to the first end of the light-emitting side of the first optocoupler Q1, and the second input end of the main control chip C1 is connected to the first end of the light-emitting side of the second optocoupler Q2.

[0053] Exemplarily, after the main control chip C1 controls the first lamp bead D1 or the second lamp bead D2 to light up, it can start to execute the corresponding test program. Optionally, the main control chip C1 can determine the working state of the first lamp bead D1 and the second lamp bead D2 at this time through the control level of the first end of the first optocoupler Q1 and the second optocoupler Q2.

[0054] Please refer to Figure 2 Optionally, the photoelectric fingerprint pad printing test device also includes a fifth resistor R5 and a sixth resistor R6; the fifth resistor R5 is connected in series between the first input end of the main control chip C1 and the first end of the light-emitting side of the first optocoupler Q1, and the sixth resistor R6 is connected in series between the second input end of the main control chip C1 and the first end of the light-emitting side of the second optocoupler Q2.

[0055] Exemplarily, through the current limiting and voltage dividing effects of the fifth resistor R5 and the sixth resistor R6, the electrical matching between the optocoupler and the main control chip C1 can be effectively matched to avoid damage to components. Optionally, the main control chip C1 can be connected to either end of the first resistor through the fifth resistor R5, and the main control chip C1 can be connected to either end of the second resistor R2 through the sixth resistor R6 to determine the working status of the first lamp bead D1 and the second lamp bead D2 at this time.

[0056] Optionally, the first preset voltage V11 and the third preset voltage V13 are the same as the first driving voltage, optionally, the second preset voltage V12 and the fourth preset voltage V14 are the same as the second driving voltage, and optionally, the fifth preset voltage V15 and the sixth preset voltage V16 are the same as the third driving voltage.

[0057] Exemplarily, the first driving voltage may be a ground voltage. Exemplarily, the second driving voltage may be a driving voltage required by the lamp bead. Exemplarily, the third driving voltage may be a ground voltage.

[0058] Please refer to Figure 2 Optionally, the photoelectric fingerprint pad printing test device further includes a seventh resistor R7, a first end of the seventh resistor R7 is connected to the second driving voltage, and a second end of the seventh resistor R7 is grounded.

[0059] Exemplarily, by grounding the seventh resistor R7, the second driving voltage output to the lamp bead can be effectively clamped, so that the test circuit can work stably.

[0060] Optionally, the photoelectric fingerprint pad printing test device further includes a third connector; the second end of the second lamp bead D2 and the second end of the first lamp bead D1 are connected to the third driving voltage through the first pin of the third connector. Optionally, the second end of the light receiving side of the second optical coupler Q2 and the second end of the light receiving side of the first optical coupler Q1 are connected to the second driving voltage through the second pin of the third connector.

[0061] Exemplarily, the third connector provides the second driving voltage and the third driving voltage for the working process of the first lamp bead D1 and the second lamp bead D2, which optimizes the connection and fixing process of the driving voltage source and the circuit board, and facilitates the replacement and arrangement of the test equipment.

[0062] This application discloses the following technical effects:

[0063] In the present application, the main control chip, the first optocoupler and the second optocoupler are arranged on the circuit board, and the first lamp bead and the second lamp bead are arranged adjacent to each other on the lamp holder by using an integrated molding process. After the potential isolation of the optocoupler, the coordination test of two different lamp beads is controlled by the main control chip, which can simplify the test process control, improve test efficiency, reduce test costs, and improve user experience.

[0064] The present application also provides an electronic device, including the above-mentioned photoelectric fingerprint pad printing test device. In the embodiment of the electronic device provided in the present application, all technical features of any of the above-mentioned embodiments may be included, and the description expansion and explanation content are basically the same as the embodiments of the above-mentioned method, and will not be repeated here.

[0065] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0066] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A photoelectric fingerprint pad printing test device, characterized in that: It includes a circuit board, a main control chip, a first optical coupler, a second optical coupler, a first lamp bead, a second lamp bead and a lamp holder, wherein the main control chip, the first optical coupler and the second optical coupler are arranged on the circuit board, and the first lamp bead and the second lamp bead are adjacently arranged on the lamp holder by adopting an integrated molding process; The first output end of the main control chip is connected to the first end of the light-emitting side of the first optical coupler, and the second output end of the main control chip is connected to the first end of the light-emitting side of the second optical coupler; The second end of the light-emitting side of the first optocoupler is connected to a first preset voltage, the first end of the light-receiving side of the first optocoupler is connected to the first end of the first lamp bead, and the second end of the light-receiving side of the first optocoupler is connected to a second preset voltage; The second end of the light-emitting side of the second photocoupler is connected to a third preset voltage, the first end of the light-receiving side of the second photocoupler is connected to the first end of the second lamp bead, and the second end of the light-receiving side of the second photocoupler is connected to a fourth preset voltage; The second end of the first lamp bead is connected to a fifth preset voltage, and the second end of the second lamp bead is connected to a sixth preset voltage.

2. The photoelectric fingerprint pad printing test device according to claim 1, characterized in that: The photoelectric fingerprint pad printing test device further includes a first connector, wherein the first end of the light receiving side of the first optical coupler is connected to the first end of the first lamp bead through the first pin of the first connector, and the second end of the first lamp bead is connected to the fifth preset voltage through the second pin of the first connector; And / or, the photoelectric fingerprint pad printing testing device also includes a second connector, the first end of the light receiving side of the second optocoupler is connected to the first end of the second lamp bead through the first pin of the second connector, and the second end of the second lamp bead is connected to the sixth preset voltage through the second pin of the second connector.

3. The photoelectric fingerprint pad printing test device according to claim 2, characterized in that: The first connector is a 2-pin connector; and / or the second connector is a 3-pin connector.

4. The photoelectric fingerprint pad printing test device according to claim 1, characterized in that: The photoelectric fingerprint pad printing testing device also includes a first resistor and a second resistor; The first resistor is connected in series between the first output terminal of the main control chip and the first end of the light-emitting side of the first optical coupler; The second resistor is connected in series between the second output terminal of the main control chip and the first terminal of the light-emitting side of the second optical coupler.

5. The photoelectric fingerprint pad printing test device according to claim 4, characterized in that: The photoelectric fingerprint pad printing test device also includes a third resistor and a fourth resistor; The third resistor is connected in series between the first end of the light-emitting side of the first optocoupler and the ground, and the fourth resistor is connected in series between the first end of the light-emitting side of the second optocoupler and the ground.

6. The photoelectric fingerprint pad printing test device according to claim 1, characterized in that: The first input end of the main control chip is connected to the first end of the light-emitting side of the first optical coupler, and the second input end of the main control chip is connected to the first end of the light-emitting side of the second optical coupler.

7. The photoelectric fingerprint pad printing test device according to claim 6, characterized in that: The photoelectric fingerprint pad printing testing device also includes a fifth resistor and a sixth resistor; the fifth resistor is connected in series between the first input end of the main control chip and the first end of the light-emitting side of the first optocoupler, and the sixth resistor is connected in series between the second input end of the main control chip and the first end of the light-emitting side of the second optocoupler.

8. The photoelectric fingerprint pad printing test device according to any one of claims 1 to 7, characterized in that: The first preset voltage and the third preset voltage are the same as the first driving voltage, and / or the second preset voltage and the fourth preset voltage are the same as the second driving voltage, and / or the fifth preset voltage and the sixth preset voltage are the same as the third driving voltage.

9. The photoelectric fingerprint pad printing test device according to claim 8, characterized in that: The photoelectric fingerprint pad printing testing device further includes a seventh resistor, a first end of the seventh resistor is connected to the second driving voltage, and a second end of the seventh resistor is grounded.

10. The photoelectric fingerprint pad printing test device according to claim 8, characterized in that: The photoelectric fingerprint pad printing testing device also includes a third connector; The second end of the second lamp bead and the second end of the first lamp bead are connected to the first driving voltage through the first pin of the third connector; And / or, the second end of the light receiving side of the second optical coupler and the second end of the light receiving side of the first optical coupler are connected to the third driving voltage through the second pin of the third connector.

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