Control circuit for controlling light guide water flowing effect and vehicle lamp

Abstract

The control circuit is characterized in that the control circuit is applied to the light guide water flowing lamp, the light guide water flowing lamp comprises a light guide assembly and a light source assembly, the light source assembly is installed at the end of the light guide assembly, and the light source assembly comprises a first light source and a second light source; the control circuit comprises a micro-control unit; the first light source and the second light source are electrically connected with the micro-control unit; the micro-control unit controls the brightness and on-off states of the first light source and the second light source through pulse width modulation signals. The power supply is electrically connected with the micro-control unit, the first light source and the second light source; wherein the power supply supplies power to the micro-control unit, the first light source and the second light source. According to the utility model, the technical problems that the design complexity and the production cost are increased due to the fact that a more complex and fine dynamic assembly line effect cannot be realized by the existing LED array arrangement scheme and a larger structural space is needed are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile lighting, specifically, a control circuit and car lamp for controlling light guide water effect. BACKGROUND

[0002] With the rapid development of the automobile industry, consumers' requirements for the appearance and functionality of automobiles are increasing. In particular, in the field of automobile lighting, dynamic water flow effect car lamp designs are widely popular in the market due to their unique visual effects and safety. This design not only enhances the aesthetics of the car, but also plays an important role in improving vehicle recognition and safety. Currently on the market, the common method to achieve dynamic water flow effect of automobile atmosphere lamp is to arrange LED light source array on a printed circuit board, and by lighting LED light source in turn, light is shot into the thick wall piece from the back or top of the thick wall piece. Inside the thick wall piece, the light is constantly reflected and refracted, and finally shot out from the same light-emitting surface of the thick wall piece, forming the visual effect of dynamic water flow. However, the existing LED array arrangement scheme has some limitations. First, this scheme cannot be used with light guide or optical fiber to achieve more complex and delicate dynamic water flow effect. Second, since the reflection and refraction of light need to be realized in the thick wall piece, a larger structure space is required, which increases the complexity of design and manufacturing. In addition, the larger structure space also means higher material and manufacturing cost, which poses a challenge to mass production and market competitiveness.

[0003] The existing LED array arrangement scheme cannot achieve more complex and delicate dynamic water flow effect, and requires a larger structure space, which increases the design complexity and production cost. SUMMARY

[0004] The utility model solves the technical problem that the existing LED array arrangement scheme cannot achieve more complex and delicate dynamic water flow effect, and requires a larger structure space, which increases the design complexity and production cost. The utility model realizes more complex and delicate dynamic water flow effect by micro control unit controlling the brightness and switching state change of the first light source and the second light source, and the new scheme only needs a smaller structure space, which effectively reduces the design complexity and production cost.

[0005] To solve the above problems, the utility model provides a control circuit for controlling the light guide water effect is applied to the light guide water lamp, the light guide water lamp includes the light guide component and the light source component, the light source component installs in the light guide component end, the light source component includes the first light source and the second light source, control circuit includes: micro control unit, the first light source and the second light source, the first light source and the second light source electric connection micro control unit, micro control unit controls the brightness and the switch state of the first light source and the second light source through pulse width modulation signal generator. Power, power electric connection micro control unit, the first light source and the second light source, wherein, power is the power supply for micro control unit, the first light source and the second light source.

[0006] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: by using the pulse width modulation signal generator of the micro control unit to control the brightness and the switch state of the first light source and the second light source, the brightness and the switch state of the light source can be accurately controlled, and the flexibility and accuracy of the light source control are improved. The combination of the light guide component and the light source component can save more space and reduce the weight of the whole lamp compared with the traditional thick-wall glass or other materials. Using a smaller number of light sources to achieve the water lighting effect can reduce costs and possibly improve energy efficiency. At the same time, by controlling the brightness and the switch state of different light sources, more rich and dynamic visual effects can be created, enhancing the decorative and practicality of the light guide water lamp.

[0007] In one possible design, the control circuit further includes a power converter, the power converter is electrically connected to the power source, the first light source and the second light source; the micro control unit is electrically connected to the power converter; wherein the electrical energy of the power source is converted by the power converter and input to the first light source and the second light source; the micro control unit can control the start and stop of the power converter.

[0008] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the power converter can effectively convert the electrical energy of the power source into voltage and current suitable for the first light source and the second light source, improving the energy utilization efficiency of the system. This efficient energy management helps to reduce energy consumption and prolong the service life of the light source. The start and stop control of the micro control unit on the power converter enables the system to flexibly adjust the working state of the light source according to actual needs. This flexibility is suitable for different application scenarios and can quickly respond to environmental changes or user needs. The introduction of the power converter can effectively isolate the electrical characteristics between the power source and the light source, reducing the impact of power fluctuations on the performance of the light source, thereby improving the stability and reliability of the system. At the same time, the use of the power converter can simplify the overall circuit design, reduce the need for complex circuits, make the system design more simple, and reduce production and maintenance costs.

[0009] In one possible design, the control circuit further includes a low dropout linear regulator disposed between the power supply and the micro control unit.

[0010] Compared with the prior art, the technical effects achieved by the technical solution are as follows: the low dropout linear regulator can provide stable voltage output, ensuring that the micro control unit can obtain the required stable power supply under various working conditions. This can avoid system failure caused by voltage fluctuation. By providing stable power supply, the influence of power supply noise and fluctuation on the micro control unit can be reduced, thereby improving the overall reliability of the system. Moreover, this helps to reduce the failure rate caused by unstable power supply. The use of the low dropout linear regulator can simplify the design of the power management circuit, reduce the need for complex power management solutions, make the overall circuit design more concise, and reduce the design and production costs.

[0011] In one possible design, the control circuit further includes an input unit connected to the micro control unit; wherein the input unit is configured to receive user parameter configuration and transmit the parameter configuration to the micro control unit; and the micro control unit is configured to adjust the brightness and switching state of the first light source and the second light source.

[0012] Compared with the prior art, the technical effects achieved by the technical solution are as follows: the introduction of the input unit enables users to conveniently configure parameters, improving the operability and user experience of the system. Users can easily adjust the brightness and switching state of the light source according to their individual needs, enhancing the affinity of the product. The input unit can receive user configuration in real time and transmit it to the micro control unit, so that the brightness and switching state of the light source can be quickly adjusted, providing instant feedback. This fast response capability improves the intelligent level of the system and user satisfaction. The design of the input unit can simplify the user's operation process, making parameter configuration intuitive and easy to understand, reducing the user's learning cost, and being suitable for a wide range of user groups.

[0013] In one possible design, the parameters of the pulse width modulation signal include a duty cycle; wherein the higher the duty cycle, the higher the brightness of the first light source or the second light source; the lower the duty cycle, the lower the brightness of the first light source or the second light source; when the duty cycle is 100%, the brightness of the first light source or the second light source is 100%; when the duty cycle is 0%, the brightness of the first light source or the second light source is 0%.

[0014] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: by adjusting the duty cycle, the brightness of the light source can be accurately controlled. The change of the duty cycle directly affects the switching time and brightness output of the light source, so that the user can flexibly adjust the brightness of the light source according to the needs, and meet the lighting needs of different scenes. The pulse width modulation signal control mode can realize smooth brightness change, avoiding the flickering phenomenon that may occur in the traditional dimming method, thereby improving the visual comfort and enhancing the user experience. The adjustability of the duty cycle enables designers to create various light effects, such as gradient, flicker, etc., increasing the diversity and appeal of the product, and adapting to different market needs.

[0015] In one possible design, when the brightness of the first light source or the second light source is reduced to 0%, the micro control unit compensates 5% duty cycle for the first light source or the second light source to compensate light for the first light source or the second light source.

[0016] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: in the case where the brightness is reduced to 0%, by compensating 5% duty cycle for the light source, the light source can still maintain a certain brightness output. This ensures that the light source will not be completely extinguished in certain situations, enhances the visibility of the light source, avoids the feeling of strangeness caused by the complete extinction of the light source, and improves the overall user experience. At the same time, the design of compensating duty cycle can reduce the wear and tear caused by frequent switching of the light source, reduce the thermal load of the light source, and thus prolong the service life of the light source, which helps to improve the reliability and durability of the product.

[0017] In one possible design, the parameters of the pulse width modulation signal further include an adjustment period; wherein the adjustment period is used to control the brightness change rate of the first light source and the second light source; the smaller the adjustment period, the faster the brightness change of the first light source and the second light source; the larger the adjustment period, the slower the brightness change of the first light source and the second light source.

[0018] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the introduction of the adjustment period enables the user to flexibly adjust the brightness change rate of the light source according to the needs. A smaller adjustment period can achieve rapid brightness change, suitable for occasions requiring dynamic effects; while a larger adjustment period is suitable for environments requiring smooth transition. Through fast or slow brightness change, rich visual effects can be created, improving the aesthetics and appeal of the light guide water lamp. This flexibility enables the product to adapt to different occasions and atmospheres, meeting the diverse needs of users.

[0019] In one possible design, the range of variation of the adjustment period includes [5ms, 25ms].

[0020] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the range of the adjustment period enables the design to adapt to various application scenarios. Users can select a suitable adjustment period according to specific requirements, thereby realizing different light effect effects and increasing the flexibility and applicability of the product. The range design of the adjustment period can avoid excessively frequent brightness changes and reduce the visual fatigue of users. Especially in the case of long-time use, smooth brightness changes can improve the comfort of use.

[0021] The utility model further provides a car lamp, car lamp uses for controlling the control circuit of light guide water effect, car lamp includes light guide water lamp, wherein, control circuit is used for controlling the brightness, switch state and change period of light source component.

[0022] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: by controlling the brightness, switch state and change period of the light source component, the car lamp can realize dynamic light effects. At the same time, the car lamp of the utility model includes the control circuit for controlling the light guide water effect of any technical scheme of the utility model, therefore, it has all the beneficial effects of the water pan of any technical scheme of the utility model, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The electrical diagram of the control circuit for controlling the light guide water effect provided for the utility model embodiment is shown in the figure.

[0024] Figure 2 The structural schematic diagram of the light guide water lamp is shown in the figure.

[0025] Figure 3 The flow chart for the micro control unit to execute user parameters is shown in the figure.

[0026] Figure 4 The running flow chart of the control circuit is shown in the figure. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0028] Referring to Figures 1 to 4The embodiment provides a control circuit for controlling a light guide water effect, which is applied to a light guide water lamp, the light guide water lamp comprising a light guide assembly and a light source assembly, the light source assembly being installed at the end of the light guide assembly, and the light source assembly comprising a first light source and a second light source; the control circuit comprising: a micro control unit; the first light source and the second light source being electrically connected to the micro control unit; the micro control unit controlling the brightness and the switching state of the first light source and the second light source through a pulse width modulation signal generator; and a power supply being electrically connected to the micro control unit, the first light source and the second light source, and supplying power for the micro control unit, the first light source and the second light source.

[0029] Specifically, in the embodiment, as shown in a structural schematic diagram of the light guide water lamp, Figure 2 The light guide water lamp comprises a light guide assembly and a light source assembly, wherein the light guide assembly is a light guide or an optical fiber; the light source assembly comprises a first light source and a second light source, and the first light source and the second light source are LED lamps in the embodiment. In the embodiment, the light source assembly only comprises the first light source and the second light source, and in other embodiments, the type, quantity and color of the light source assembly are arranged according to functional requirements, and are not limited by the embodiment. The first light source and the second light source are arranged at the light inlet of the two ends of the light guide or the optical fiber, and do not need to be arranged in an array. By controlling the bright-dark change of the first light source and the second light source, a dynamic water flow visual effect can be created. Moreover, the water flow lamp structure comprising only one light guide assembly and one light source assembly is suitable for scenes with narrow structural space, and the application scenarios are more extensive. The light source is distributed at the light inlets of the two ends of the light guide or the optical fiber, and the change of light in the light guide or the optical fiber can be controlled because the light guide or the optical fiber has the light transmission characteristic. When the light source emits light, the light is captured by the light guide or the optical fiber and propagates along the length of the light guide or the optical fiber. The material inside the light guide or the optical fiber has high reflectivity, and can effectively guide the light to be transmitted along the light guide or the optical fiber. By controlling the current size of the light source at the two ends, the bright-dark change of the light source can be controlled. When the current of the light source increases, the light source emits stronger light, resulting in an increase in the light intensity in the light guide or the optical fiber. Conversely, when the current of the light source decreases, the light emitted by the light source becomes weaker, resulting in a decrease in the light intensity in the light guide or the optical fiber. By adjusting the current size of the light source at the two ends, the bright-dark change of the light source can be realized, thereby creating a water flow visual effect. This effectively simplifies the arrangement of the light source and the design of the control circuit, and also provides a more flexible control mode.

[0030] Specifically, pulse width modulation (PWM) signal is a technology for controlling the average power of a signal by adjusting the width of the pulses. The period of the PWM signal is fixed, but the duration of the high level of the pulse can vary. The pulse width modulation signal generator can generate pulses with different duty cycles according to the input control signal, such as voltage or digital signal, thereby achieving control over the brightness of the light source. Among them, the pulse width modulation signal generator is set in the microcontroller, by changing the duration of the high level, the output power can be effectively controlled, thereby realizing the adjustment of the brightness, speed and other parameters of the light source.

[0031] In an embodiment of the present application, the control circuit further comprises a power converter, the power converter being electrically connected to the power supply, the first light source and the second light source; the micro control unit is electrically connected to the power converter; wherein the electrical energy of the power supply is converted by the power converter and input to the first light source and the second light source; the micro control unit can control the start and stop of the power converter.

[0032] Specifically, in the present embodiment, as shown in the electrical diagram of the control circuit of the present embodiment, Figure 1 DC_EN refers to the connection line or pin between the DCDC module and the MCU, used to control the enable or switching function of the DCDC module. Generally, the MCU can control the switching of the DCDC module by controlling the level state of the DC_EN pin. When the DC_EN pin is high, the DCDC module is in the enabled state and can work normally; when the DC_EN pin is low, the DCDC module is disabled and stops working. By controlling the DC_EN pin, the MCU can flexibly control the switching state of the DCDC module to realize the management and control of the power supply. This control method can be used in energy saving, protection circuit and equipment application scenarios. Among them, the DCDC module is a power converter, and the MCU is a micro control unit. The DCDC converter is a power conversion device, which mainly functions to convert the voltage of a direct current power supply from one level to another. In the present embodiment, the input power is converted by the DCDC module into a constant voltage 5V LED+ output signal, which provides power signals to the first light source LED1 and the second light source LED2 respectively; Power is the power supply; User is the input unit.

[0033] In an embodiment of the present application, the control circuit further comprises a low dropout linear regulator, the low dropout linear regulator being arranged between the power supply and the micro control unit.

[0034] Specifically, in the present embodiment, the LDO can convert the voltage provided by the power supply into a stable voltage required by the micro control unit. Among them, the low dropout regulator (Low Dropout Regulator, LDO) is a power management device used to convert the input DC voltage into a stable output DC voltage. Compared with traditional linear voltage regulator, one of the significant features of LDO is that it can still work normally when the difference between the input voltage and the output voltage is very small.

[0035] In an embodiment of the present application, the control circuit further comprises an input unit connected to the micro control unit; wherein the input unit is used to receive the parameter configuration of the user and transmit the parameter configuration to the micro control unit; so that the micro control unit adjusts the brightness and switching state of the first light source and the second light source.

[0036] Specifically, in the present embodiment, as shown in the flowchart of the micro control unit, Figure 3 the parameter configuration input by the user through the input unit will be processed by the micro control unit into a pulse width modulation signal and sent to the two light sources respectively. Among them, after the micro control unit obtains the user input, it will form a task sequence and send the task sequence to the CPU for response, so as to realize the adjustment of the flow speed of the light guide water lamp.

[0037] In an embodiment of the present application, the parameters of the pulse width modulation signal include duty cycle; wherein the higher the duty cycle, the higher the brightness of the first light source or the second light source; the lower the duty cycle, the lower the brightness of the first light source or the second light source; when the duty cycle is 100%, the brightness of the first light source or the second light source is 100%; when the duty cycle is 0%, the brightness of the first light source or the second light source is 0%.

[0038] Specifically, the duty cycle is the ratio of the duration of high level in the pulse width modulation signal to the total cycle time. It is usually expressed in percentage, reflecting the proportion of the time that the signal is in high level state in the whole cycle. When the duty cycle is 100%, the signal is always in high level state, and the light source will always emit light with maximum brightness. When the duty cycle is 0%, the signal is always in low level state, and the light source will be completely extinguished. When the duty cycle is between 0% and 100%, the brightness of the light source will change according to the different duty cycles.

[0039] In an embodiment of the present application, when the brightness of the first light source or the second light source is reduced to 0%, the micro control unit compensates 5% duty cycle for the first light source or the second light source to compensate light for the first light source or the second light source.

[0040] Specifically, in the present embodiment, when the duty cycle of the first light source or the second light source reaches 0%, the software of the light guide flowing water lamp will control the control unit to increase the duty cycle of the first light source or the second light source by 5%. When the light source brightness decreases to 0%, the environment may become too dark, affecting the user's visual experience. By compensating 5% of the duty cycle, the visibility of the light source can be maintained to some extent, avoiding the discomfort caused by complete extinction. And when the duty cycle decreases, by increasing the duty cycle by 5% for low-bit compensation, the visibility of the light source in low brightness state can be effectively improved. This compensation makes the light source maintain a certain brightness when switching alternately, even at a lower brightness, thereby reducing the visual jarring.

[0041] In an embodiment of the present application, the parameters of the pulse width modulation signal further include an adjustment period; wherein the adjustment period is used to control the brightness change rate of the first light source and the second light source; the smaller the adjustment period, the faster the brightness change of the first light source and the second light source; the larger the adjustment period, the slower the brightness change of the first light source and the second light source.

[0042] Specifically, the adjustment period refers to the time interval in the pulse width modulation signal for controlling the brightness change of the light source. It determines the update frequency of the pulse width modulation signal, thereby affecting the rate of brightness change of the light source. The faster the brightness change rate of the light source. Since the micro control unit can update the duty cycle of the pulse width modulation signal more frequently, the brightness of the light source can quickly respond to the control instruction, realizing rapid brightness change. It is suitable for scenes that require fast response, such as dynamic effects, warning lights or applications that require rapid brightness adjustment. The slower the brightness change rate of the light source. The frequency of the micro control unit updating the pulse width modulation signal is reduced, and the brightness change of the light source will become smooth, and the response time is prolonged. It is suitable for scenes that require smooth transition, such as in-car lighting, atmosphere lights, etc., to avoid the discomfort caused by sudden brightness changes.

[0043] In an embodiment of the present application, the range of variation of the adjustment period includes [5ms, 25ms].

[0044] Specifically, in this embodiment, the microcontroller unit (MCU) provides two independent channels of pulse width modulation (PWM) signals at a frequency of 40kHz to individually control the first and second light sources. The 40kHz frequency refers to the period frequency of the PWM signal being 40,000 Hz. Frequency refers to the number of times a signal repeats per unit time. In this case, the PWM signal repeats 40,000 times per second, meaning each cycle lasts 1 / 40,000 of a second. This frequency is typically used to control the brightness of LEDs because the human eye has a lower sensitivity to light at a frequency of 40kHz, avoiding flickering or visual discomfort. The adjustment period is 5ms to 25ms, meaning the duty cycle of the PWM signal can be reset or adjusted every 5ms to 25ms. For example, if the adjustment period is set to 5ms, the duty cycle of the PWM signal can change rapidly every 5ms, resulting in a faster change in LED brightness and a more rapid flow effect. If the adjustment period is set to 25ms, the duty cycle of the PWM signal changes more slowly, resulting in a smoother change in LED brightness and a slower flow effect. Here, PWM stands for Pulse Width Modulation.

[0045] Specifically, when the first light source is fully lit, its brightness is 100%, and the second light source's brightness is 0%. The brightness of the first light source is reduced from 100% to 0%, while the brightness of the second light source is increased from 0% to 100%. It is then determined whether the second light source is fully lit, i.e., whether its brightness is 100%. If the second light source's brightness is 100%, its brightness is reduced from 100% to 0%, while the brightness of the first light source is increased from 0% to 100%. It is then determined whether the first light source is fully lit, i.e., whether its brightness is 100%. In this embodiment, both the first and second light sources are LEDs; the first light source is LED1, and the second light source is LED2. The PWM duty cycle is directly proportional to the LED brightness; a duty cycle of 0% represents the lowest brightness, and a duty cycle of 100% represents the highest brightness. The total cycle time can be obtained based on the duty cycle's rate of change and the adjustment period. Figure 4 As shown in the flowchart of the control circuit, actual verification shows that when the adjustment cycle is 10ms, and the duty cycle reaches 100%, the PWM adjustment cycle is divided by 10 times to increase the execution time to 100ms. When the duty cycle reaches 0%, a 5% low-level compensation is added in software to optimize the low-level compensation, reducing the switching time between LE and LED2 by 50ms. These two time cycle adjustments result in a better visual effect. By alternating the brightness of the first and second light sources at both ends of the light guide component and utilizing the light conduction characteristics of the light guide component, a flowing light effect is created, enhancing visual appeal. During the brightness change process, the brightness changes of the first and second light sources are gradual, avoiding abrupt brightness jumps. This smooth transition improves the user's visual experience and reduces visual fatigue.

[0046] When the LED1 is fully bright and the duty cycle of the PWMA is 100%, the LED2 is not bright and the duty cycle of the PWMB is 0%+ the low-bit compensation value of the duty cycle, when the adjustment period is 10ms, the adjustment period is adjusted to 10 times of the frequency, the single-color light emission of the single LED1 light source is kept for 100ms through the light guide, and the actual effect is better than that without adjustment.

[0047] When the LED1 is gradually darkened, the duty cycle of the PWMA is attenuated in the direction from 100% to 0% along with the adjustment period. Meanwhile, the LED2 is gradually brightened, the duty cycle of the PWMB is increased in the direction from 0% to 100% along with the adjustment period, and the gradual change effect from the LED2 light source to the LED1 light source needs a period of 950ms through the software low-bit compensation of the duty cycle when the adjustment period is 10ms, and the actual effect is smoother than the light source flow without adjustment.

[0048] When the LED2 is fully bright and the duty cycle of the PWMB is 100%, the LED1 is not bright and the duty cycle of the PWMA is 0%+ the low-bit compensation value of the duty cycle, when the adjustment period is 10ms, the adjustment period is adjusted to 10 times of the frequency, the single-color light emission of the single LED2 light source is kept for 100ms through the light guide, and the actual effect is better than that without adjustment.

[0049] When the LED2 is gradually darkened, the duty cycle of the PWMB is attenuated in the direction from 100% to 0% along with the adjustment period. Meanwhile, the LED1 is gradually brightened, the duty cycle of the PWMA is increased in the direction from 0% to 100% along with the adjustment period, and the gradual change effect from the LED1 light source to the LED2 light source needs a period of 950ms through the software low-bit compensation of the duty cycle when the adjustment period is 10ms, and the actual effect is smoother than the light source flow without adjustment.

[0050] The utility model also provides a car light, car light uses for controlling the control circuit of light guide water effect, car light includes light guide water lamp, wherein, control circuit is used for controlling the brightness, switch state and change period of light source assembly.

[0051] Specifically, by controlling the brightness, switch state and change period of the light source assembly, the car light can realize dynamic light effect. At the same time, the car light of the utility model includes the control circuit for controlling the light guide water effect of any technical scheme of the utility model, so it has all the beneficial effects of the water pan of any technical scheme of the utility model, which will not be repeated here.

[0052] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the utility model, can make various changes and modifications, therefore the protection scope of the utility model should be limited to the range defined by the claims.

Claims

1. A control circuit for controlling a light-guided water effect, characterized in that The application is applied to a light guide water flow lamp, the light guide water flow lamp comprises a light guide assembly and a light source assembly, the light source assembly is installed at the end of the light guide assembly, the light source assembly comprises a first light source and a second light source; the control circuit comprises: a micro control unit; the first light source and the second light source, the first light source and the second light source are electrically connected with the micro control unit; the micro control unit controls the brightness and the switching state of the first light source and the second light source through a pulse width modulation signal generator; a power supply, the power supply is electrically connected with the micro control unit, the first light source and the second light source; wherein the power supply supplies power for the micro control unit, the first light source and the second light source.

2. The control circuit for controlling a light-guided water effect according to claim 1, characterized in that, the control circuit further comprises a power converter, the power converter is electrically connected with the power supply, the first light source and the second light source; the micro control unit is electrically connected with the power converter; wherein the power energy of the power supply is converted through the power converter and then input into the first light source and the second light source; the micro control unit can control the start and the stop of the power converter.

3. The control circuit for controlling a light-guided water effect according to claim 1, characterized in that, the control circuit further comprises a low dropout linear regulator, the low dropout linear regulator is arranged between the power supply and the micro control unit.

4. The control circuit for controlling a light-guided water effect according to claim 1, characterized in that, the control circuit further comprises an input unit, the input unit is connected with the micro control unit; wherein the input unit is used for receiving the parameter configuration of the user and transmitting the parameter configuration to the micro control unit; the micro control unit adjusts the brightness and the switching state of the first light source and the second light source.

5. The control circuit for controlling a light-guided water effect according to claim 1, characterized in that, the parameters of the pulse width modulation signal include a duty cycle; wherein the higher the duty cycle is, the higher the brightness of the first light source or the second light source is; the lower the duty cycle is, the lower the brightness of the first light source or the second light source is; when the duty cycle is 100%, the brightness of the first light source or the second light source is 100%; when the duty cycle is 0%, the brightness of the first light source or the second light source is 0%.

6. The control circuit for controlling a light-guided water effect according to claim 5, characterized in that, when the brightness of the first light source or the second light source is reduced to 0%, the micro control unit compensates 5% of the duty cycle for the first light source or the second light source to compensate light for the first light source or the second light source.

7. The control circuit for controlling a light-guided water effect according to claim 5, characterized in that, the parameters of the pulse width modulation signal further include an adjustment period; wherein the adjustment period is used for controlling the brightness change rate of the first light source and the second light source; the smaller the adjustment period is, the faster the brightness of the first light source and the second light source changes; the larger the adjustment period is, the slower the brightness of the first light source and the second light source changes.

8. The control circuit for controlling a light-guided water effect according to claim 7, characterized in that, the change range of the adjustment period includes [5ms, 25ms].

9. A vehicle lamp characterized by the vehicle lamp uses the control circuit for controlling the light guide water flow effect according to any one of claims 1-8, the vehicle lamp comprises a light guide water flow lamp; wherein the control circuit is used for controlling the brightness, the switching state and the change period of the light source assembly.

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