Touch RGB circuit

Abstract

The utility model discloses a touch RGB circuit which comprises an input processing module, a reference source management module, a touch MCU module, an RGB driving module and an LED module. The input end of the input processing module receives voltage and communication signals of a vehicle body, the output end of the input processing module is connected with the input end of the reference source management module, the input end of the RGB driving module and the input end of the LED module, and the input processing module is used for preprocessing the voltage and communication signals of the vehicle body; the output end of the reference source management module is connected with the touch MCU module, and the reference source management module is used for supplying power to the touch MCU module; the touch MCU module is connected with the RGB driving module, and the touch MCU module is used for collecting a touch signal and sending an enable signal to the RGB driving module. The touch RGB circuit provided by the utility model can be lightened through a control signal or a touch signal, does not influence each other, and is high in circuit sensitivity and strong in stability.

Description

Technical Field

[0001] The utility model relates to a touch RGB circuit. Background Art

[0002] At present, in the existing vehicle lamp technology, the ambient lamp is installed inside the vehicle and can emit different colors to create different atmosphere effects. Due to the diverse changes in light color and shape, different experience feelings will be brought to consumers. Generally, the touch RGB circuit is designed according to its own required functions and lighting effects. For example, the music rhythm effect is carried out according to the communication signal of the vehicle body to the lamp end. It may be that the vehicle provides the CAN signal or the LIN signal. However, the existing technology still has the following disadvantages:

[0003] 1. The touch RGB circuit has poor sensitivity, small signal-to-noise ratio, and large noise interference.

[0004] 2. When the vehicle body voltage is unstable or in the case of mis-triggering, the touch RGB circuit will cause the lamp to light up. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a touch RGB circuit that can be lit by both control signals and touch signals without mutual influence, with high circuit sensitivity and strong stability.

[0006] To solve the above technical problem, the technical solution of the utility model is:

[0007] A touch RGB circuit includes an input processing module, a reference source management module, a touch MCU module, an RGB driving module, and an LED module;

[0008] The input end of the input processing module receives the voltage and communication signal of the vehicle body. The output end of the input processing module is respectively connected to the input end of the reference source management module, the input end of the RGB driving module, and the input end of the LED module. The input processing module is used for preprocessing the voltage and communication signal of the vehicle body;

[0009] The output end of the reference source management module is connected to the touch MCU module. The reference source management module is used for supplying power to the touch MCU module;

[0010] The touch MCU module is connected to the RGB driving module. The touch MCU module is used for collecting touch signals and sending an enable signal to the RGB driving module;

[0011] The output end of the RGB driving module is connected to the LED module. The RGB driving module is used for lighting the LED module.

[0012] Further, the input processing module includes a power input processing module and a communication input processing module;

[0013] The input end of the power input processing module receives the voltage signal of the vehicle body, and the output end of the power input processing module is respectively connected to the input end of the reference source management module, the power input end of the RGB driving module, and the power input end of the LED module;

[0014] The input end of the communication input processing module receives the communication signal of the vehicle body, and the output end of the communication input processing module is connected to the communication input end of the RGB driving module.

[0015] Further, the power input processing module includes a TVS tube D15, a capacitor C115, a capacitor C1, an ESD protection diode D1, a diode D2, a capacitor C2, a π-type filter, a voltage-dividing resistor, and a diode D16. One end of the TVS tube D15 is connected to the voltage signal VIN of the vehicle body, the other end of the TVS tube D15 is grounded, one end of the capacitor C115 is connected to the voltage signal VIN of the vehicle body, the other end of the capacitor C115 is grounded, one end of the capacitor C1 is connected to the voltage signal VIN of the vehicle body, the other end of the capacitor C1 is grounded, one end of the ESD protection diode D1 is connected to the voltage signal VIN of the vehicle body, the other end of the ESD protection diode D1 is grounded, the positive electrode of the diode D2 is connected to the voltage signal VIN of the vehicle body, the negative electrode of the diode D2 is connected to the π-type filter, one end of the capacitor C2 is connected to the negative electrode of the diode D2, the other end of the capacitor C2 is grounded, the π-type filter is connected to the voltage-dividing resistor, the voltage-dividing resistor is connected to the positive electrode of the diode D16, and the negative electrode of the diode D16 is respectively connected to the input end of the reference source management module and the power input end of the RGB driving module.

[0016] Further, the π-type filter includes a capacitor C131, a capacitor C3, a magnetic bead B1, a capacitor C4, and a capacitor C132. One end of the capacitor C131 is connected to one end of the magnetic bead B1, the other end of the capacitor C131 is grounded, one end of the capacitor C3 is connected to one end of the magnetic bead B1, the other end of the capacitor C3 is grounded, one end of the capacitor C4 is connected to the other end of the magnetic bead B1, the other end of the capacitor C4 is grounded, one end of the capacitor C132 is connected to the other end of the magnetic bead B1, and the other end of the capacitor C132 is grounded.

[0017] Further, the voltage-dividing resistor includes a resistor R73, a resistor R74, a resistor R75, and a resistor R76. The resistor R73 is connected to the other end of the magnetic bead B1, the resistor R73, the resistor R74, the resistor R75, and the resistor R76 are connected in series in sequence, and the resistor R76 is connected to the positive electrode of the diode D16.

[0018] Furthermore, the communication input processing module includes a capacitor C117, a capacitor C116, an ESD protection diode D3, a capacitor C133, a capacitor C6, a magnetic bead B2, a capacitor C5, and a capacitor C130. One end of the capacitor C117, one end of the capacitor C116, one end of the ESD protection diode D3, one end of the capacitor C133, and one end of the capacitor C6 are all connected to the vehicle body communication signal LIN. The other end of the capacitor C117, the other end of the capacitor C116, the other end of the ESD protection diode D3, the other end of the capacitor C133, and the other end of the capacitor C6 are all grounded. One end of the magnetic bead B2 is connected to the vehicle body communication signal LIN, and the other end of the magnetic bead B2 is connected to the communication input end of the RGB driving module. One end of the capacitor C5 and one end of the capacitor C130 are both connected to the other end of the magnetic bead B2, and the other end of the capacitor C5 and the other end of the capacitor C130 are both grounded.

[0019] Furthermore, the reference source management module includes a voltage conversion chip U8, an input terminal processing capacitor, and an output terminal processing capacitor. The input terminal of the voltage conversion chip U8 is connected to the output terminal of the power input processing module, the output terminal of the voltage conversion chip U8 is connected to the touch MCU module, the input terminal processing capacitor is connected in parallel at the input terminal of the voltage conversion chip U8, and the output terminal processing capacitor is connected in parallel at the output terminal of the voltage conversion chip U8.

[0020] Furthermore, the touch MCU module includes a touch sensing component and an MCU chip U7, and the touch sensing component is connected to the IO port of the MCU chip U7.

[0021] Furthermore, the RGB driving module includes a driving chip U6. The enable terminal of the driving chip U6 is connected to the touch MCU module, the communication input terminal of the driving chip U6 is connected to the output terminal of the communication input processing module, and the power input terminal of the driving chip U6 is connected to the output terminal of the power input processing module.

[0022] Furthermore, the LED module includes multiple parallel RGB lamp beads.

[0023] By adopting the above technical solutions, the utility model can realize the function of being lit by a control signal and also supports touch lighting, without mutual interference. It supports vehicle body LIN communication, and the stability and reliability of the circuit are relatively high. The adopted touch solution has strong anti-interference ability, can adapt to various complex working environments, and has high sensitivity. The RGB driving module can realize the effect of touch lighting RGB, realize different brightness and color adjustment, that is, stepless dimming, and the circuit has over-temperature protection. The touch MCU module circuit can be used in various application scenarios with different covering materials and thicknesses, can perform touch protection against external interference, prevent mis-triggering, has high reliability, and strong anti-interference ability. Description of the Drawings

[0024] Figure 1 This is the principle block diagram of a touch RGB circuit of the present utility model;

[0025] Figure 2 This is the circuit schematic diagram of the input processing module of the present utility model;

[0026] Figure 3 This is the circuit schematic diagram of the reference source management module of the present utility model;

[0027] Figure 4 This is the circuit schematic diagram of the touch MCU module of the present utility model;

[0028] Figure 5 This is the circuit schematic diagram of the RGB driving module of the present utility model;

[0029] Figure 6 This is the circuit schematic diagram of the LED module of the present utility model. Detailed implementation manners

[0030] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments in conjunction with the accompanying drawings.

[0031] As Figure 1 shown, this embodiment provides a touch RGB circuit, including an input processing module, a reference source management module, a touch MCU module, an RGB driving module and an LED module.

[0032] The input end of the input processing module receives the voltage and communication signal of the vehicle body. The output end of the input processing module is respectively connected to the input end of the reference source management module, the input end of the RGB driving module and the input end of the LED module. The input processing module is used for preprocessing the voltage and communication signal of the vehicle body.

[0033] The output end of the reference source management module is connected to the touch MCU module. The reference source management module is used for supplying power to the touch MCU module.

[0034] The touch MCU module is connected to the RGB driving module. The touch MCU module is used for collecting touch signals and sending an enabling signal to the RGB driving module.

[0035] The output end of the RGB driving module is connected to the LED module. The RGB driving module is used for lighting the LED module.

[0036] As Figure 2 shown, the input processing module of this embodiment includes a power input processing module and a communication input processing module.

[0037] The input end of the power input processing module receives the voltage signal of the vehicle body, and the output end of the power input processing module is respectively connected to the input end of the reference source management module, the power input end of the RGB driving module, and the power input end of the LED module.

[0038] The input end of the communication input processing module receives the communication signal of the vehicle body, and the output end of the communication input processing module is connected to the communication input end of the RGB driving module.

[0039] Among them, the power input processing module includes a TVS tube D15, a capacitor C115, a capacitor C1, an ESD protection diode D1, a diode D2, a capacitor C2, a π-type filter, a voltage-dividing resistor, and a diode D16. One end of the TVS tube D15 is connected to the voltage signal VIN of the vehicle body, and the other end of the TVS tube D15 is grounded. One end of the capacitor C115 is connected to the voltage signal VIN of the vehicle body, and the other end of the capacitor C115 is grounded. One end of the capacitor C1 is connected to the voltage signal VIN of the vehicle body, and the other end of the capacitor C1 is grounded. One end of the ESD protection diode D1 is connected to the voltage signal VIN of the vehicle body, and the other end of the ESD protection diode D1 is grounded. The positive electrode of the diode D2 is connected to the voltage signal VIN of the vehicle body, and the negative electrode of the diode D2 is connected to the π-type filter. One end of the capacitor C2 is connected to the negative electrode of the diode D2, and the other end of the capacitor C2 is grounded. The π-type filter is connected to the voltage-dividing resistor, the voltage-dividing resistor is connected to the positive electrode of the diode D16, and the negative electrode of the diode D16 is respectively connected to the input end of the reference source management module and the power input end of the RGB driving module.

[0040] The π-type filter includes a capacitor C131, a capacitor C3, a magnetic bead B1, a capacitor C4, and a capacitor C132. One end of the capacitor C131 is connected to one end of the magnetic bead B1, and the other end of the capacitor C131 is grounded. One end of the capacitor C3 is connected to one end of the magnetic bead B1, and the other end of the capacitor C3 is grounded. One end of the capacitor C4 is connected to the other end of the magnetic bead B1, and the other end of the capacitor C4 is grounded. One end of the capacitor C132 is connected to the other end of the magnetic bead B1, and the other end of the capacitor C132 is grounded.

[0041] The voltage-dividing resistor includes a resistor R73, a resistor R74, a resistor R75, and a resistor R76. The resistor R73 is connected to the other end of the magnetic bead B1, the resistor R73, the resistor R74, the resistor R75, and the resistor R76 are connected in series in sequence, and the resistor R76 is connected to the positive electrode of the diode D16.

[0042] When the vehicle body starts to supply power and there is a voltage signal VIN at the power supply input terminal of the lamp, when the current passing through diode D2 is positive, the state is conduction; when the current passing through diode D2 is negative, the state is cut-off. The ESD protection diode D1 plays an electrostatic protection role for the front-end voltage signal. B1 is a magnetic bead, which plays a role in filtering high-frequency signals of the front-end power supply. It is equivalent to a series connection of a resistor and an inductor, and forms a π-type filter with capacitors C3, C131, C4, and C132 to better eliminate the noise generated by the resonance effect of the capacitor. The resistors R73, R74, R75, R76 and the diode D16 are connected in series, which can play a role in dividing a certain voltage. The specific voltage value depends on the selection of the corresponding resistor and diode parameters. The output voltage of the diode D16 is VIN_IN.

[0043] Among them, the communication input processing module includes capacitor C117, capacitor C116, ESD protection diode D3, capacitor C133, capacitor C6, magnetic bead B2, capacitor C5 and capacitor C130. One end of capacitor C117, one end of capacitor C116, one end of ESD protection diode D3, one end of capacitor C133 and one end of capacitor C6 are all connected to the communication signal LIN of the vehicle body. The other end of capacitor C117, the other end of capacitor C116, the other end of ESD protection diode D3, the other end of capacitor C133 and the other end of capacitor C6 are all grounded. One end of magnetic bead B2 is connected to the communication signal LIN of the vehicle body, and the other end of magnetic bead B2 is connected to the communication input terminal of the RGB driving module. One end of capacitor C5 and one end of capacitor C130 are both connected to the other end of magnetic bead B2. The other end of capacitor C5 and the other end of capacitor C130 are both grounded.

[0044] The vehicle body provides a serial communication LIN signal to the lamp. Capacitors C117 and C116 are signal input capacitors, which mainly play a role in isolating the DC voltage of the input terminal and the circuit. When the DC voltage of the LIN signal is unstable or interfered, the signal input capacitors C117 and C116 can provide a relatively stable DC voltage signal, so as to ensure the normal operation of the circuit. At the same time, further filtering processing is performed on the communication LIN signal provided by the vehicle body to better separate the useful signal. The ESD protection diode D3 plays an electrostatic protection role for the front-end communication LIN signal, and can quickly conduct the static electricity to the ground network to form a release. The magnetic bead B2, capacitors C6, C133, C5, and C130 form a π-type filter. Among them, capacitors C133 and C130 are alternative capacitors. When the failure mode is that C5 and C6 near both ends of the magnetic bead B2 are open circuits, they can replace their work. The communication signal output through the magnetic bead B2 is LIN_IN.

[0045] As Figure 3As shown, the reference source management module of this embodiment includes a voltage conversion chip U8, an input terminal processing capacitor, and an output terminal processing capacitor. The input terminal of the voltage conversion chip U8 is connected to the output terminal of the power input processing module, the output terminal of the voltage conversion chip U8 is connected to the touch MCU module, the input terminal processing capacitor is connected in parallel to the input terminal of the voltage conversion chip U8, and the output terminal processing capacitor is connected in parallel to the output terminal of the voltage conversion chip U8. The model of the voltage conversion chip U8 is NCV7805. The voltage conversion chip U8 converts the input voltage VIN_IN and outputs a 5V level. Capacitors C126, C122, C118, and C119 are the input terminal processing capacitors of the voltage conversion chip U8, and capacitors C120, C121, C123, and C127 are the output terminal processing capacitors of the voltage conversion chip U8.

[0046] As Figure 4As shown in the figure, the touch MCU module of this embodiment includes a touch sensing component and an MCU chip U7. The touch sensing component is connected to the IO port of the MCU chip U7. The MCU chip U7 is a touch sensing type MCU, and its model is KF8A100ENG. Pin 1 is the reset pin, which allows the single-chip microcomputer to update to the initialization state, and various counters, registers, ports, etc. are restored to their original default states to facilitate the entry of a new program. C73 and R79 form an external reset circuit, and the parameters of the resistor and capacitor determine the reset time. This parameter ensures the stability and reliability of the initialization process of the MCU chip U7 before normal operation. Pins 9 and 10 are the input recognition pins for touch sensing. Commonly used touch sensing materials include FR4, FPC, PET film, coils or copper sheets, etc. For example, when the touch covering layer material in the whole lamp structure is a diaphragm below. Pin 9 is one of the multiplexed IO ports and is one of the capacitive touch channels. When a person's finger touches the diaphragm, the diaphragm will give the chip two touch signal lines. The touch principle used here is based on self-inductive capacitance detection. By detecting the capacitance value between the single electrode and the ground, the initial capacitance value of the touch area to the ground, and the capacitance value of the area where the human hand touches the diaphragm. Capacitor C72 is the parasitic capacitance value of this pin when the finger does not touch the internal capacitive touch controller. Resistor R71 is a series resistor, forming an RC low-pass filter circuit, which can reduce the amplitude of the RF noise to the ninth pin. Similarly, resistor R72 is also a series resistor. When laying out the PCB, place this resistor close to the pin of the MCU chip U7 so that the radiation noise caused by the trace can be filtered out at the input end of the MCU chip U7. Pin 20 is the touch button reference capacitance input pin, and the access range is 0pF to 10pF. At the same time, it is also the internal enable output signal line. When EN is valid, it will be given to pin 4 of the driver chip U6 to make it perform corresponding actions. Pin 18 VDD is pulled up to 5V through R77 and is the power supply input pin of the MCU chip U7. Pin 17 is grounded. C125 and R78 are connected between pins 12 and 11. Among them, pin 1 is the reset pin, pin 18 is the power supply pin, pin 17 is the ground pin, pin 16 is the data pin, and pin 15 is the clock pin, which are the in-circuit programming and burning pins of U7, and different program writing and debugging, etc. can be realized.

[0047] As Figure 5As shown in the figure, the RGB driving module of this embodiment includes a driving chip U6. The enable terminal of the driving chip U6 is connected to the touch MCU module. The communication input terminal of the driving chip U6 is connected to the output terminal of the communication input processing module. The power input terminal of the driving chip U6 is connected to the output terminal of the power input processing module. The model of the driving chip U6 is IND83211. The first pin of the driving chip U6 is CLK, which is the internal clock pin. The second pin is DIO, which is the data pin. The third and fourth pins are internal voltage output pins. RT1 and RT2 are positive temperature coefficient thermistors, which are connected in series on the third and fourth pins. When the lamp is working continuously, the energy at the input end is converted into electrical energy to supply power to the load. The LED is the carrier that converts electrical energy into light energy, and the remaining electrical energy is converted into heat energy and consumed on the power components. If the temperature rises, the resistance values of the thermistors RT1 and RT2 will increase according to their own temperature curves. When the voltages of the third and fourth pins are constant, the driving chip U6 will detect the change in the current of these two pins inside. The current changes from normal to very small. At this time, the temperature protection function will be enabled, that is, the pin current for driving the LED will be 0. That is, when the temperature rises to the threshold point set by the over-temperature protection function, the entire lamp will stop working, ensuring that all components in the circuit are not damaged and improving the service life. The fifth pin is a GPIO pin, which receives the status of the 20th pin of U7 as an enable signal input to realize the control of the driving chip U6. For each unused GPIO pin among 7, 8, 9, 10, 11, 12, and 13, a current-limiting resistor needs to be connected in series to prevent the registers inside the chip from still having the memory function to retain the original data when the power supply of the driving chip U6 is disconnected and not cleared, and there is also the phenomenon that the LED driven will still glow slightly due to the reverse injection of weak current, which may also cause abnormal operation of the chip, further protecting the driving chip U6 and its pins. The 14th pin is grounded, and the 16th pin is the LIN signal receiving pin. The 17th and 18th pins are the power supply pins of the driving chip U6, providing the voltage that enables it to work normally. A π-type filter circuit composed of L6 etc. is connected between the 19th and 21st pins. The 23rd and 24th pins are analog dimming pins, which are connected to a 5V voltage. The 22nd pin is grounded, which is the 0-level reference point of the chip. The 25th to 48th pins of the driving chip U6 can drive 8 RGB lamp beads. If the internal time-division multiplexing function is used, more small-current RGBs can also be driven. This embodiment only uses the working modes of 2 GPIO ports. The fifth and sixth pins are in an OR relationship, that is, when one of them has a signal, the lamp will work. For example, when a finger touches for the first time, when the MCU chip U7 first senses the touch signal sent by the touch sensing component, the sensor inside the chip has an initial counting reference value.After being touched by a finger, the internal capacitive touch detection module will sample, and the counter will output a value. By comparison, the working states of 0 and 1 of the sensor are judged. When it is 1, the signal indicating that a finger is pressed will be processed and sent to the 20th pin of U7. At the same time, the 20th pin will send it to the 5th pin of the driving chip U6. Through the program, the function of automatically addressing the LIN nodes of the internal register and sensor modules is realized, that is, when installed at different positions on the vehicle, the node positions of each lamp can be quickly matched with the LIN nodes of the vehicle body to avoid misinstallation. At the same time, by adjusting the pulse width modulation duty cycle of each RGB light-emitting diode (red, green, blue), different brightness of each light-emitting diode can be realized, that is, the brightness adjustment function. The color adjustment function can also be realized by correcting the coordinates of each color point. Similarly, when touched by a finger for the second time, the 20th pin of the MCU chip U7 will still detect and send it to the fifth pin of the driving chip U6. At this time, through the software algorithm of the program, a loop structure configuration is given. When the fifth pin of the driving chip U6 is enabled for the first time, the chip normally drives the RGB light-emitting diodes to light up and display the effects. When the fifth pin of the driving chip U6 is enabled for the second time, the chip turns off the RGB light-emitting diodes. In this way, as long as there is no power-off and restart, the default mode is to light up the RGB for the first touch, turn off the RGB for the second touch, light up the RGB for the third touch, turn off the RGB for the fourth touch, and so on in a cycle.

[0048] As Figure 6 shown, the LED module of this embodiment includes multiple parallel-connected RGB light-emitting diodes. Taking four RGB light-emitting diodes as an example, each single RGB integrates 1 red LED, 1 green LED, and 1 blue LED. In the figure, D5A is red, D5B is green, and D5C is blue. Generally, the typical voltage of blue is the largest, the typical voltage of red is the smallest, the emission wavelength of red is the largest, and the emission wavelength of blue is the smallest. The internal junction temperature of each LED is the same. The size of this junction temperature will affect factors such as the efficiency of the diode when emitting light, the reliability of lighting, the length of the emission wavelength, and the service life of the component. Therefore, in the circuit design, its junction temperature value cannot be exceeded, and a good heat dissipation area for the LED should be ensured. A small-capacity bypass capacitor is connected in parallel beside each LED to provide a release path with a lower impedance for the noise of high-frequency signals and improve the stability and efficiency of the circuit. The positive electrode of each LED is connected to VIN_IN, and the negative electrode is connected to the 25th to 48th pins of U6. The maximum current that can be used for a single channel from 25 to 48 is 45 mA. For derating use, two pins are connected in parallel to drive a single LED to ensure the power balance of the output pins of U6 and reduce heat.

[0049] In the specific embodiments described above, the technical problems solved by the present utility model, the technical solutions and the beneficial effects have been further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A touch RGB circuit, characterized in that: It includes input processing module, reference source management module, touch MCU module, RGB driver module and LED module; The input end of the input processing module receives the voltage and communication signal of the vehicle body, and the output end of the input processing module is respectively connected to the input end of the reference source management module, the input end of the RGB driving module and the input end of the LED module, and the input processing module is used to pre-process the voltage and communication signal of the vehicle body; The output end of the reference source management module is connected to the touch MCU module, and the reference source management module is used to supply power to the touch MCU module; The touch MCU module is connected to the RGB driving module, and the touch MCU module is used to collect touch signals and send enable signals to the RGB driving module; The output end of the RGB driving module is connected to the LED module, and the RGB driving module is used to light up the LED module.

2. The touch RGB circuit according to claim 1, characterized in that: The input processing module includes a power input processing module and a communication input processing module; The input end of the power input processing module receives the voltage signal of the vehicle body, and the output end of the power input processing module is respectively connected to the input end of the reference source management module, the power input end of the RGB driving module and the power input end of the LED module; The input end of the communication input processing module receives the communication signal of the vehicle body, and the output end of the communication input processing module is connected to the communication input end of the RGB driving module.

3. The touch RGB circuit according to claim 2, characterized in that: The power input processing module includes a TVS tube D15, a capacitor C115, a capacitor C1, an ESD protection diode D1, a diode D2, a capacitor C2, a π-type filter, a voltage divider resistor and a diode D16. One end of the TVS tube D15 is connected to the voltage signal VIN of the vehicle body, and the other end of the TVS tube D15 is grounded. One end of the capacitor C115 is connected to the voltage signal VIN of the vehicle body, and the other end of the capacitor C115 is grounded. One end of the capacitor C1 is connected to the voltage signal VIN of the vehicle body, and the other end of the capacitor C1 is grounded. One end of the protection diode D1 is connected to the voltage signal VIN of the vehicle body, the other end of the ESD protection diode D1 is grounded, the positive electrode of the diode D2 is connected to the voltage signal VIN of the vehicle body, the negative electrode of the diode D2 is connected to the π-type filter, one end of the capacitor C2 is connected to the negative electrode of the diode D2, the other end of the capacitor C2 is grounded, the π-type filter is connected to a voltage dividing resistor, the voltage dividing resistor is connected to the positive electrode of the diode D16, and the negative electrode of the diode D16 is respectively connected to the input end of the reference source management module and the power input end of the RGB driving module.

4. The touch RGB circuit according to claim 3, characterized in that: The π-type filter includes a capacitor C131, a capacitor C3, a magnetic bead B1, a capacitor C4 and a capacitor C132, one end of the capacitor C131 is connected to one end of the magnetic bead B1, and the other end of the capacitor C131 is grounded, one end of the capacitor C3 is connected to one end of the magnetic bead B1, and the other end of the capacitor C3 is grounded, one end of the capacitor C4 is connected to the other end of the magnetic bead B1, and the other end of the capacitor C4 is grounded, one end of the capacitor C132 is connected to the other end of the magnetic bead B1, and the other end of the capacitor C132 is grounded.

5. The touch RGB circuit according to claim 4, characterized in that: The voltage divider resistors include resistor R73, resistor R74, resistor R75 and resistor R76, the resistor R73 is connected to the other end of the magnetic bead B1, the resistors R73, R74, R75 and R76 are connected in series in sequence, and the resistor R76 is connected to the positive electrode of the diode D16.

6. The touch RGB circuit according to claim 2, characterized in that: The communication input processing module includes a capacitor C117, a capacitor C116, an ESD protection diode D3, a capacitor C133, a capacitor C6, a magnetic bead B2, a capacitor C5 and a capacitor C130. One end of the capacitor C117, one end of the capacitor C116, one end of the ESD protection diode D3, one end of the capacitor C133 and one end of the capacitor C6 are all connected to the communication signal LIN of the vehicle body, the other end of the capacitor C117, the other end of the capacitor C116, the other end of the ESD protection diode D3, the other end of the capacitor C133 and the other end of the capacitor C6 are all grounded, one end of the magnetic bead B2 is connected to the communication signal LIN of the vehicle body, the other end of the magnetic bead B2 is connected to the communication input end of the RGB driving module, one end of the capacitor C5 and one end of the capacitor C130 are both connected to the other end of the magnetic bead B2, and the other end of the capacitor C5 and the other end of the capacitor C130 are both grounded.

7. The touch RGB circuit according to claim 2, characterized in that: The reference source management module includes a voltage conversion chip U8, an input end processing capacitor and an output end processing capacitor. The input end of the voltage conversion chip U8 is connected to the output end of the power input processing module, and the output end of the voltage conversion chip U8 is connected to the touch MCU module. The input end processing capacitor is connected in parallel to the input end of the voltage conversion chip U8, and the output end processing capacitor is connected in parallel to the output end of the voltage conversion chip U8.

8. The touch RGB circuit according to claim 1, characterized in that: The touch MCU module includes a touch sensing component and an MCU chip U7, and the touch sensing component is connected to the IO port of the MCU chip U7.

9. The touch RGB circuit according to claim 2, characterized in that: The RGB driving module includes a driving chip U6, an enable end of the driving chip U6 is connected to the touch MCU module, a communication input end of the driving chip U6 is connected to the output end of the communication input processing module, and a power input end of the driving chip U6 is connected to the output end of the power input processing module.

10. The touch RGB circuit according to claim 1, characterized in that: The LED module includes a plurality of RGB lamp beads connected in parallel.

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