Light supplement lamp control circuit
By combining the power chip with the fill light switch, the independent control and synchronous operation of multiple fill lights are achieved, solving the problems of circuit complexity and power consumption waste in the existing technology, simplifying circuit design and reducing costs.
Patent Information
- Application Number
- CN202520441249.X
- 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
Existing fill light control circuits require each fill light to be equipped with an independent power chip, which increases circuit complexity, increases area, makes wiring difficult and costs high, and causes power waste because the fill light cycle is not synchronized with the camera's image acquisition time.
The design employs a combination of power chip and fill light switch. Multiple fill lights are connected in parallel through NMOS transistors, and the CPU controls the conduction state of each fill light switch to achieve independent control and synchronized fill light and camera operation.
It simplifies circuit design, reduces the number of power chips, lowers system cost, supports flexible expansion, and enables synchronous operation of the fill light and camera, thus reducing power consumption.
Smart Images
Figure CN223957690U_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. BACKGROUND
[0002] In the existing code scanning equipment light supplementing lamp control technology, in order to realize the independent control of multiple light supplementing lamps, usually need to equip independent power supply chip for each light supplementing lamp. This design although can satisfy the individual control demand of each light supplementing lamp, but also there are some obvious defects. For example, using multiple independent power supply chip will significantly increase the complexity of circuit, leads to circuit board area increase, wiring difficulty, also increase the cost of system. In addition, the existing light supplementing lamp control circuit when supplementing light, because the length of light supplementing period is not synchronous with the time of camera image acquisition, to a certain extent, will cause the waste of energy. SUMMARY
[0003] The utility model provides a light supplementing lamp control circuit to solve the independent control of multiple light supplementing lamps in prior art, usually need to equip independent power supply chip for each light supplementing lamp's defect.
[0004] The utility model provides a light supplementing lamp control circuit, include: power connection end, CPU connection end, power supply chip, light supplementing lamp, light supplementing switch, camera connection end,
[0005] Among them, power supply chip has 8 pins, its A2 is connected with power connection end, C2, D2 pin is connected with CPU connection end respectively, B2 pin is connected with camera connection end, B1 pin is connected with power connection end through an inductance, C1, A1 pin is grounded, D1 pin is connected with the first end of light supplementing lamp, the second end of light supplementing lamp is connected with CPU connection end through light supplementing switch.
[0006] According to the light supplementing lamp control circuit provided by the utility model, the light supplementing switch includes NMOS pipe, the 1 foot of NMOS pipe is connected with CPU connection end, the 2 foot of NMOS pipe is grounded, the 3 foot of NMOS pipe is connected with the second end of light supplementing lamp.
[0007] According to the light supplementing lamp control circuit provided by the utility model, the number of light supplementing lamps is set to be multiple, and the number of light supplementing switches is consistent with the number of light supplementing lamps.
[0008] Among them, multiple light supplementing lamps are connected in parallel with each other, and multiple light supplementing switches are also connected in parallel with each other, and each light supplementing lamp corresponds to a light supplementing switch connected in series.
[0009] According to the light supplementing lamp control circuit provided by the utility model, the power connection end is also grounded through the first capacitor.
[0010] The C1 pin of the power supply chip is grounded through the second capacitor.
[0011] The first resistor is connected between the 1 pin of the NMOS tube and the CPU connection end.
[0012] The first resistor is connected between the 1 pin of the NMOS tube and the CPU connection end.
[0013] The light supplementing lamp control circuit provided by the utility model has the advantages that through the combination of the power supply chip and the light supplementing switch, independent control of multiple light supplementing lamps is realized under the cooperation with the CPU, the number of power supply chips is reduced, and the circuit design is simplified; moreover, the circuit design supports the parallel connection of multiple light supplementing lamps, and each light supplementing lamp can be independently controlled, so that flexible expansion according to actual requirements is facilitated; meanwhile, the power supply chip is connected with the camera and is controlled to be turned on and off by the camera, so that the light supplementing lamp and the camera can be synchronously turned on and off during work, and power consumption is further reduced. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0015] Fig. 1 It is a schematic diagram of the light supplementing lamp control circuit provided by the utility model;
[0016] Fig. 2 It is an electrical block diagram of the light supplementing lamp control circuit provided by the utility model. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the drawings in the utility model, and clearly and completely describe the technical scheme in the utility model, obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0018] The following will combine Figs. 1-2 The utility model discloses a kind of light supplementing lamp control circuits, comprising: power connection end, CPU connection end, power supply chip U11, light supplementing lamp, light supplementing switch, camera connection end;
[0019] The model of the power supply chip U11 is LM36010YKBR, which has 8 pins, namely: A2 (IN), C2 (SDA), D2 (SCL), B2 (EN), B1 (SW), C1 (OUT), D1 (LED), and A1 (GND). The A2 pin of the power supply chip U11 is connected to the power supply connection end, the C2 and D2 pins are respectively connected to the CPU connection end, the B2 pin is connected to the camera connection end, the B1 pin is connected to the power supply connection end through an inductor L11, the C1 and A1 pins are grounded, and the D1 pin is connected to the first end of the fill light. The second end of the fill light is connected to the CPU connection end through a fill light switch.
[0020] As the name implies, the power supply connection end is used to connect the power supply, the CPU connection end is used to connect the CPU, and the camera connection end is used to connect the camera.
[0021] In this embodiment, the fill light switch further includes an NMOS tube Q11. The 1 pin of the NMOS tube Q11 is connected to the CPU connection end, the 2 pin is grounded, and the 3 pin is connected to the second end of the fill light.
[0022] The number of fill lights is set to be multiple, and the number of fill light switches is consistent with the number of fill lights. Among them, the multiple fill lights are connected in parallel with each other, the multiple fill light switches are also connected in parallel with each other, and each fill light corresponds to a fill light switch connected in series.
[0023] The fill light includes white fill light W11, red fill light R11, and blue fill light B11, each of which includes two LED lamp beads of corresponding colors in parallel state. Of course, other colors of fill lights can also be selected according to actual needs.
[0024] In the circuit, there are also other functional components. Specifically, the power supply connection end is also grounded through a first capacitor C11; the C1 pin of the power supply chip is grounded through a second capacitor C12; the 1 pin of the NMOS tube Q11 is connected to the CPU connection end through a first resistor R11; and the connection line between the first resistor R11 and the 1 pin of the NMOS tube Q11 is grounded through a second resistor R12.
[0025] The B2 pin of the power supply chip U11 is its switch pin. In operation, the power supply chip U11 is connected to the camera through the B2 pin. When the camera collects images, the B2 pin becomes a high level state, making the power supply chip U11 in an open and working state. At this time, the power supply outputs current to the fill light through the D1 pin of the power supply chip U11. The size of the current is controlled by the CPU through the C2 and D2 pins of the power supply chip U11.
[0026] The light supplement lamp has a white light supplement lamp W11, a red light supplement lamp R11 and a blue light supplement lamp B11, and of course the number and color of the light supplement lamp can be adjusted according to the actual situation, and the light supplement lamp of multiple colors is only turned on when the camera collects an image; that is, the plurality of light supplement switches are controlled by the CPU, and the CPU only controls one light supplement switch to be turned on when the camera collects an image each time; that is, the CPU controls the pin 1 of one NMOS tube Q11 to be in a high level state each time the camera collects an image, at this time, the pins 2 and 3 of the NMOS tube Q11 are turned on, and the circuit of the corresponding light supplement lamp is turned on, and the light supplement lamp is turned on to perform light supplement work; it can also be understood that the CPU first controls one light supplement switch to be turned on, and when the camera collects an image, the power supply chip U11 is triggered to be turned on, and the power supply simultaneously supplies current to the plurality of light supplement lamps, but since only one light supplement switch is in the turned-on state, only the corresponding light supplement lamp can be turned on to perform light supplement work;
[0027] Further, when the camera collects an image for the first time, the white light supplement lamp W11 is turned on, if the light supplement of the white light supplement lamp W11 can make the code scanning device successfully recognize the bar code, the white light supplement lamp W11 is still used for light supplement when the camera collects an image next time; if the white light supplement lamp W11 cannot make the code scanning device recognize the bar code, the red light supplement lamp R11 is used for light supplement when the camera collects an image next time, and so on.
[0028] When the camera stops collecting an image, the B2 pin of the power supply chip U11 becomes a low level state, so that the power supply chip U11 is in a closed state, at this time, the power supply cannot output current to the light supplement lamp, and the corresponding light supplement lamp is also turned off.
[0029] 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, so as to ensure the accuracy and stability of the bar code recognition.
[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but 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: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced; 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. A supplementary lighting control circuit, characterized in that, include: Power connector, CPU connector, power chip, fill light, fill light switch, camera connector; The power chip has 8 pins. Pin A2 is connected to the power supply terminal, pins C2 and D2 are connected to the CPU terminal, pin B2 is connected to the camera terminal, pin B1 is connected to the power supply terminal through an inductor, pins C1 and A1 are grounded, pin D1 is connected to the first end of the fill light, and the second end of the fill light is connected to the CPU terminal through a fill light switch.
2. The supplementary lighting control circuit according to claim 1, characterized in that, The fill light switch includes an NMOS transistor. Pin 1 of the NMOS transistor is connected to the CPU connection terminal, pin 2 of the NMOS transistor is grounded, and pin 3 of the NMOS transistor is connected to the second end of the fill light.
3. The supplementary lighting control circuit according to claim 2, characterized in that, The number of fill lights is set to multiple, and the number of fill light switches is the same as the number of fill lights; Among them, multiple fill lights are connected in parallel, multiple fill light switches are also connected in parallel, and each fill light corresponds to a fill light switch connected in series.
4. The supplementary lighting control circuit according to claim 1, characterized in that, The power connection terminal is also grounded through the first capacitor.
5. The supplementary lighting control circuit according to claim 1, characterized in that, The C1 pin of the power chip is grounded through a second capacitor.
6. The supplementary lighting control circuit according to claim 2, characterized in that, A first resistor is connected between pin 1 of the NMOS transistor and the CPU connection terminal.
7. The supplementary lighting control circuit according to claim 6, characterized in that, The connection line between the first resistor and pin 1 of the NMOS transistor is grounded through the second resistor.