Light supplement lamp control circuit of code scanning equipment
By designing a single-channel power supply chip and a switching chip assembly, the complexity and power consumption issues of the fill light control circuit in the barcode scanning device were solved, enabling independent control and synchronous operation of multiple fill lights, thus improving the efficiency and cost performance of the barcode scanning device.
Patent Information
- Application Number
- CN202520441308.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-13
AI Technical Summary
The existing supplementary lighting control circuit of the barcode scanning device uses multiple independent control chips, which increases circuit complexity, cost and power consumption. At the same time, the supplementary lighting cycle is not synchronized with the camera image acquisition time, which affects the scanning efficiency.
By using a single-channel power supply chip and a switching chip assembly, and connecting multiple fill lights and switching chips in parallel, independent control of multiple fill lights can be achieved, allowing them to be turned on and off synchronously, simplifying circuit design and reducing power consumption.
It enables flexible control of multiple supplementary lights, reduces circuit complexity and cost, and improves the efficiency and power consumption performance of the barcode scanning device.
Smart Images
Figure CN223957691U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a light supplementing lamp circuit technical field especially relates to a light supplementing lamp control circuit of code scanning equipment. BACKGROUND
[0002] In code scanning equipment (such as bar code scanner, two-dimensional code scanner etc.), the role of light supplementing lamp is crucial.Light supplementing lamp not only can provide sufficient illumination under insufficient light environment, ensures that camera can clearly capture the image of bar code or two-dimensional code, still can adapt to different scanning scene and demand through different color light supplementing lamp (such as white, red, blue etc.).For example, red light supplementing lamp is often used for infrared scanning, and blue light supplementing lamp is suitable for the bar code scanning of some special materials.However, along with the increasingly complex function of code scanning equipment, the control circuit of light supplementing lamp also faces new challenges.The traditional light supplementing lamp control circuit usually adopts multiple independent control chips to control each light supplementing lamp respectively, and this mode not only increases the complexity of circuit, but also leads to the increase of cost and power consumption.In addition, the existing light supplementing lamp control circuit is different in the length of light supplementing period and the taking picture time of camera, and to some extent, it will cause the waste of power consumption. SUMMARY
[0003] The utility model provides a light supplementing lamp control circuit of code scanning equipment to solve the defect that the light supplementing lamp control circuit of prior art usually adopts multiple independent control chips to control each light supplementing lamp respectively.
[0004] The utility model provides a light supplementing lamp control circuit of code scanning equipment, include: power connection end, CPU connection end, single -way power supply chip, light supplementing lamp, switch chip subassembly, camera connection end,
[0005] Among them, single -way power supply chip has 8 pins, and its A2, B2 pin is connected with power connection end respectively, and C2, D2 pin is connected with CPU connection end respectively, and B1 pin is connected with power connection end through an inductor, and C1, A1 pin is grounded, and D1 pin is connected with the first end of light supplementing lamp,
[0006] The second end of light supplementing lamp is connected with switch chip subassembly, and switch chip subassembly is also connected with power connection end, CPU connection end, camera connection end respectively.
[0007] According to the light supplementing lamp control circuit of code scanning equipment provided by the utility model, the switch chip subassembly includes switch chip and NMOS pipe,
[0008] The switch chip has 5 pins, the A pin is connected with the camera connection end, the B pin is connected with the CPU connection end, the GND pin is grounded, the VCC pin is connected with the power supply connection end, the Y pin is connected with the 1 pin of the NMOS tube, the 2 pin of the NMOS tube is grounded, and the 3 pin of the NMOS tube is connected with the second end of the light supplement lamp.
[0009] According to the light supplement lamp control circuit of the code scanning equipment, the number of the light supplement lamps is set to be multiple, the number of the switch chip assemblies is consistent with the number of the light supplement lamps;
[0010] The plurality of light supplement lamps are connected in parallel with each other, the plurality of switch chip assemblies are also connected in parallel with each other, and each light supplement lamp corresponds to a switch chip assembly connected in series.
[0011] According to the light supplement lamp control circuit of the code scanning equipment, the light supplement lamp comprises a white light supplement lamp, a red light supplement lamp and a blue light supplement lamp.
[0012] According to the light supplement lamp control circuit of the code scanning equipment, each light supplement lamp comprises two LED lamp beads in a parallel state corresponding to a color.
[0013] According to the light supplement lamp control circuit of the code scanning equipment, the power supply connection end is further grounded through a first capacitor.
[0014] According to the light supplement lamp control circuit of the code scanning equipment, the C1 pin of the single-path power supply chip is grounded through a second capacitor.
[0015] According to the light supplement lamp control circuit of the code scanning equipment, a first resistor is connected between the Y pin of the switch chip and the 1 pin of the NMOS tube.
[0016] According to the light supplement lamp control circuit of the code scanning equipment, a second resistor is connected on the connection line between the first resistor and the 1 pin of the NMOS tube.
[0017] According to the light supplement lamp control circuit of the code scanning equipment, a third resistor is connected between the B2 pin of the single-path power supply chip and the power supply connection end.
[0018] The light supplement lamp control circuit of the code scanning equipment provided by the utility model realizes independent control of multiple light supplement lamps through the combination of the single-path power supply chip and the switch chip assembly, reduces the number of power supply chips, and simplifies circuit design; moreover, the circuit design supports parallel connection of multiple light supplement lamps, and each light supplement lamp can be independently controlled, so that flexible expansion according to actual requirements is facilitated; meanwhile, the unique design of the switch chip assembly can make the light supplement lamp and the camera start and stop synchronously, and further reduce power consumption. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Fig. 1 This is a schematic diagram of the supplementary light control circuit of the barcode scanning device provided by this utility model;
[0021] Fig. 2 This is an electrical block diagram of the supplementary light control circuit of the barcode scanning device provided by this utility model. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0023] The following is combined with Figs. 1-2 This utility model describes a supplementary light control circuit for a barcode scanning device, comprising: a power connection terminal, a CPU connection terminal, a single-channel power chip U1, a supplementary light, a switch chip assembly, and a camera connection terminal;
[0024] The single-channel power chip U1 is model LM36010YKBR, which has 8 pins: A2 (IN), C2 (SDA), D2 (SCL), B2 (EN), B1 (SW), C1 (OUT), D1 (LED), and A1 (GND). Pins A2 and B2 of the single-channel power chip U1 are connected to the power supply terminal, pins C2 and D2 are connected to the CPU terminal, pin B1 is connected to the power supply terminal through an inductor L1, pins C1 and A1 are grounded, and pin D1 is connected to the first end of the fill light.
[0025] The second end of the fill light is connected to the switch chip assembly, which is also connected to the power supply terminal, the CPU terminal, and the camera terminal.
[0026] As the names suggest, the power connector is used to connect to the power supply, the CPU connector is used to connect to the CPU, and the camera connector is used to connect to the camera.
[0027] Further, in the embodiment, the switch chip assembly includes a switch chip U2 and an NMOS tube Q1; wherein the model of the switch chip U2 is SN74LVC1G08-Q1, which has 5 pins, namely A, B, GND, VCC and Y pins; the A pin of the switch chip U2 is connected with the camera connection end, the B pin is connected with the CPU connection end, the GND pin is grounded, the VCC pin is connected with the power connection end, and the Y pin is connected with the 1 pin of the NMOS tube Q1, the 2 pin of the NMOS tube Q1 is grounded, and the 3 pin of the NMOS tube Q1 is connected with the second end of the light supplement lamp.
[0028] In the embodiment, the number of light supplement lamps is set to be multiple, and the number of switch chip assemblies is consistent with the number of light supplement lamps.
[0029] Among them, the multiple light supplement lamps are connected in parallel with each other, and the multiple switch chip assemblies are also connected in parallel with each other, and each light supplement lamp corresponds to a switch chip assembly connected in series.
[0030] The light supplement lamp includes white light supplement lamp W, red light supplement lamp R and blue light supplement lamp B, and each light supplement lamp includes two LED lamp beads of corresponding color in parallel state.
[0031] In the circuit, there are also other functional components, specifically: the power connection end is also grounded through a first capacitor C11, the C1 pin of the single-channel power supply chip U1 is grounded through a second capacitor C12, the 1 pin of the NMOS tube is connected with the Y pin of the switch chip U2 through a first resistor R1, and the connection line between the 1 pin of the NMOS tube Q1 and the first resistor R1 is grounded through a second resistor R2; the B2 pin of the single-channel power supply chip U1 is connected with the power connection end through a third resistor R3.
[0032] The B2 pin of the single-channel power supply chip U1 is its switch pin, and in work, the power supply maintains the B2 pin in high level state, so that the single-channel power supply chip U1 is in the state of being opened and working; at this time, the CPU controls the D1 pin to output the preset current size, i.e. the current size of the light supplement lamp, through the C2 and D2 pins of the single-channel power supply chip U1; at the same time, the power supply supplies power to the switch chip U2 through the VCC pin of the switch chip U2, so that the switch chip U2 is in the state of being opened and working, and the CPU controls the B pin of the switch chip U2 to be in high level state.
[0033] When the camera collects images, the A pin of the switch chip U2 becomes a high level state, at this time, the A pin and the B pin of the switch chip U2 are high level state, the Y pin of the switch chip U2 outputs high level, the 1 pin of the NMOS tube Q1 is high level state, the 2 pin and the 3 pin of the NMOS tube Q1 are turned on, the circuit of the light supplement lamp is turned on, the light supplement lamp is turned on for light supplement work; when the camera stops collecting images, the A pin of the switch chip U2 becomes a low level state, at the same time, the Y pin of the switch chip U2 is also a low level state, and then the 1 pin of the NMOS tube Q1 is also a low level state, the 2 pin and the 3 pin of the NMOS tube Q1 are disconnected, the circuit of the light supplement lamp is disconnected, and the light supplement lamp is turned off. Through the above circuit setting, the light supplement lamp and the camera can be turned on and off synchronously, and the power consumption is reduced.
[0034] The light supplement lamp has a white light supplement lamp W, a red light supplement lamp R and a blue light supplement lamp B, and of course the number and color of the light supplement lamp can be adjusted according to the actual situation. When the camera collects images, only one color of the light supplement lamp is turned on, that is, the CPU controls only the B pin of one of the switch chips U2 to be high level state at a time; the white light supplement lamp W is turned on when the camera takes the first picture, if the light supplement of the white light supplement lamp W can make the code scanning device successfully read the bar code, the white light supplement lamp W is still used for light supplement when the camera takes the next picture; if the white light supplement lamp W cannot make the code scanning device read the bar code, the red light supplement lamp R is used for light supplement when the camera takes the next picture, and so on. Through the cooperative work of the CPU and the camera, the color of the light supplement lamp can be dynamically adjusted according to the actual code scanning environment, and the accuracy and stability of bar code reading are ensured.
[0035] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. An illuminating light control circuit of a code scanning device, characterized by, The application relates to a power supply connection end, a CPU connection end, a single-path power supply chip, a light supplementing lamp, a switch chip assembly and a camera connection end. The single-path power supply chip has eight pins, the A2 and B2 pins of which are connected with the power supply connection end, the C2 and D2 pins of which are connected with the CPU connection end, the B1 pin is connected with the power supply connection end through an inductor, the C1 and A1 pins are grounded, and the D1 pin is connected with the first end of the light supplementing lamp. The second end of the light supplementing lamp is connected with the switch chip assembly, and the switch chip assembly is also connected with the power supply connection end, the CPU connection end and the camera connection end. The switch chip assembly comprises a switch chip and an NMOS tube.
2. The light-up control circuit of a code scanning device according to claim 1, wherein, The switch chip has five pins, the A pin of which is connected with the camera connection end, the B pin is connected with the CPU connection end, the GND pin is grounded, the VCC pin is connected with the power supply connection end, and the Y pin is connected with the 1 pin of the NMOS tube, the 2 pin of the NMOS tube is grounded, and the 3 pin of the NMOS tube is connected with the second end of the light supplementing lamp. The number of the light supplementing lamps is set to be multiple, and the number of the switch chip assemblies is consistent with the number of the light supplementing lamps.
3. The light-up control circuit of a code scanning device according to claim 2, wherein, The multiple light supplementing lamps are connected in parallel with each other, and the multiple switch chip assemblies are also connected in parallel with each other, and each light supplementing lamp is connected in series with one switch chip assembly. The light supplementing lamp comprises a white light supplementing lamp, a red light supplementing lamp and a blue light supplementing lamp.
4. The light-up control circuit of a code scanning device according to claim 3, wherein, Each light supplementing lamp comprises two LED lamp beads in parallel state of corresponding colors.
5. The light-up control circuit of a code scanning device according to claim 4, wherein, The power supply connection end is also grounded through a first capacitor.
6. The light-up control circuit of a code scanning device according to claim 1, wherein, The C1 pin of the single-path power supply chip is grounded through a second capacitor.
7. The light-up control circuit of a code scanning device according to claim 1, wherein, A first resistor is connected between the Y pin of the switch chip and the 1 pin of the NMOS tube.
8. The light filling lamp control circuit of a code scanning device according to claim 2, characterized in that, The connection line of the first resistor and the 1 pin of the NMOS tube is grounded through a second resistor.
9. The light-up control circuit of a code scanning device according to claim 8, wherein, A third resistor is connected between the B2 pin of the single-path power supply chip and the power supply connection end.
10. The light-up control circuit of a code scanning device according to claim 1, wherein,