Method and system for detecting bias voltage of vehicle-mounted display screen

Abstract

The embodiment of the invention discloses a method and a system for detecting bias voltage of a vehicle-mounted display screen. Comprising the following steps: acquiring detection voltage and detection circuit information corresponding to the detection voltage; wherein the detection voltage comprises at least one of detection voltages respectively corresponding to a grid high voltage VGH, a grid low voltage VGL, a source positive voltage VSP and a source negative voltage VSN; determining a power supply bias voltage according to the detection voltage and the detection circuit information corresponding to the detection voltage; wherein the power supply bias voltage comprises at least one of VGH, VGL, VSP and VSN. According to the method for detecting the bias voltage of the vehicle-mounted display screen provided by the embodiment of the invention, the VGH, the VGL, the VSP and the VSN are determined according to the detection voltage and the detection circuit information corresponding to the VGH, the VGL, the VSP and the VSN respectively, the power supply bias voltage of the vehicle-mounted display screen can be accurately detected, and even fluctuation of the bias power supply voltage in a small range can be detected, so that the detection precision is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of display screens, and in particular to a method and system for detecting a bias voltage of a vehicle-mounted display screen. Background Art

[0002] With the development of intelligent technology, there are more and more electronic components in the car, and the failure problems between them are gradually increasing. Therefore, diagnosis or monitoring between components is becoming more and more necessary. In addition, with the emphasis on functional safety, diagnosis is becoming more and more important.

[0003] The vehicle display screen is an essential component of the vehicle. To improve the robustness of the display screen, the power supply voltage of the display screen is tested. The existing technology can only detect the high and low levels of the power supply voltage, and cannot detect small fluctuations in the power supply voltage, resulting in low detection accuracy. Summary of the Invention

[0004] Embodiments of the present invention provide a method and system for detecting a bias voltage of a vehicle-mounted display screen, which can improve the detection accuracy of the bias voltage of the vehicle-mounted display screen.

[0005] In a first aspect, an embodiment of the present invention provides a method for detecting a bias voltage of a vehicle display screen, comprising:

[0006] Acquire a detection voltage and detection circuit information corresponding to the detection voltage; wherein the detection voltage includes at least one of the detection voltages corresponding to the gate high voltage VGH, the gate low voltage VGL, the source positive voltage VSP, and the source negative voltage VSN;

[0007] A power supply bias voltage is determined according to the detection voltage and detection circuit information corresponding to the detection voltage; wherein the power supply bias voltage includes at least one of VGH, VGL, VSP and VSN.

[0008] In a second aspect, an embodiment of the present invention further provides a vehicle display screen bias voltage detection system, comprising: a VGH detection circuit, a VGL detection circuit, a VSP detection circuit, a VSN detection circuit, and an MCU; the voltage output end of the VGH detection circuit, the voltage output end of the VGL detection circuit, the voltage output end of the VSP detection circuit, and the voltage output end of the VSN detection circuit are respectively connected to the MCU via a GPIO interface;

[0009] The VGH detection circuit is used to input the detection voltage of the VGH into the MCU; the VGL detection circuit is used to input the detection voltage of the VGL into the MCU; the VSP detection circuit is used to input the detection voltage of the VSP into the MCU; the VSN detection circuit is used to input the detection voltage of the VSN into the MCU;

[0010] The MCU is used to execute the method for detecting the bias voltage of the vehicle display screen described in the embodiment of the present invention.

[0011] Embodiments of the present invention disclose a method and system for detecting the bias voltage of an on-vehicle display screen, comprising: obtaining a detection voltage and detection circuit information corresponding to the detection voltage; wherein the detection voltage includes at least one of the detection voltages corresponding to the gate high voltage VGH, the gate low voltage VGL, the source positive voltage VSP, and the source negative voltage VSN; and determining a power supply bias voltage based on the detection voltage and the detection circuit information corresponding to the detection voltage; wherein the power supply bias voltage includes at least one of VGH, VGL, VSP, and VSN. The method for detecting the bias voltage of an on-vehicle display screen provided by the embodiment of the present invention determines VGH, VGL, VSP, and VSN based on the detection voltages corresponding to VGH, VGL, VSP, and VSN and the detection circuit information, and can accurately detect the power supply bias voltage of the on-vehicle display screen, even detecting small fluctuations in the bias supply voltage, thereby improving detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of a vehicle display screen bias voltage detection system in a first embodiment of the present invention;

[0013] Figure 2 1 is a schematic structural diagram of a VGH detection circuit in Embodiment 1 of the present invention;

[0014] Figure 3 1 is a schematic structural diagram of a VGH detection circuit in Embodiment 1 of the present invention;

[0015] Figure 4 1 is a schematic structural diagram of a VGH detection circuit in Embodiment 1 of the present invention;

[0016] Figure 5 1 is a schematic structural diagram of a VGL detection circuit in Embodiment 1 of the present invention;

[0017] Figure 6 1 is a schematic structural diagram of a VGL detection circuit in Embodiment 1 of the present invention;

[0018] Figure 7 1 is a schematic structural diagram of a VGL detection circuit in Embodiment 1 of the present invention;

[0019] Figure 8 1 is a schematic structural diagram of a VSP detection circuit in Embodiment 1 of the present invention;

[0020] Figure 9 1 is a schematic structural diagram of a VSN detection circuit in Embodiment 1 of the present invention;

[0021] Figure 10 This is a flow chart of a method for detecting a bias voltage of a vehicle display screen in a second embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0023] Example 1

[0024] Figure 1 This is a structural diagram of a vehicle display screen bias voltage detection system provided in Example 1 of the present invention, as shown in FIG. Figure 1 As shown, the system includes a VGH detection circuit 10, a VGL detection circuit 20, a VSP detection circuit 30, a VSN detection circuit 40, and a microcontroller unit (MCU) 50. The voltage output terminals of the VGH detection circuit 10, the VGL detection circuit 20, the VSP detection circuit 30, and the VSN detection circuit 40 are connected to the microcontroller unit MCU 50 via general-purpose input / output (GPIO) interfaces. The VGH detection circuit 10 is used to input the detection voltage of the vertical gate high voltage (VGH) to the MCU; the VGL detection circuit 20 is used to input the detection voltage of the vertical gate low voltage (VGL) to the MCU; the VSP detection circuit 30 is used to input the detection voltage of the positive source voltage VSP to the MCU; and the VSN detection circuit 40 is used to input the detection voltage of the negative source voltage VSN to the MCU 50. The MCU is used to determine the bias voltage of the vehicle display based on the detection voltages. The specific detection method is detailed in the following embodiments and is not explained here.

[0025] In this embodiment, the VGH detection circuit 10 divides the VGH power supply voltage using preset components (such as resistors, capacitors, diodes, etc.) and outputs the voltage to the MCU 50, allowing the MCU 50 to obtain the divided VGH voltage. The VGL detection circuit 20 offsets the VGL power supply voltage using preset components (such as resistors, capacitors, diodes, etc.) and a reference power supply, divides the voltage, and outputs the voltage to the MCU, allowing the MCU to obtain the offset and divided VGL voltage. The VSP detection circuit 30 divides the VSP power supply voltage using preset components (such as resistors, capacitors, diodes, etc.) and outputs the voltage to the MCU 50, allowing the MCU to obtain the divided VSP voltage. The VSN detection circuit 40 offsets the VSN power supply voltage using preset components (such as resistors, capacitors, diodes, etc.) and a reference power supply, divides the voltage, and outputs the voltage to the MCU 50, allowing the MCU 50 to obtain the offset and divided VSN voltage.

[0026] Optional, Figure 2 Schematic diagram of a VGH detection circuit in this embodiment. Figure 2 As shown, the VGH detection circuit includes a first resistor R1 and a second resistor R2; the first end of the first resistor R1 is connected to the VGH power supply, and the second end of the first resistor R1 is connected to the MCU; the first end of the second resistor R2 is connected to the MCU, and the second end of the second resistor R2 is grounded. Figure 2 It can be seen that the VGH power supply voltage is divided by the first resistor R1 and the second resistor R2, and the divided voltage (i.e., the detection voltage) is input to the MCU. Assume that the detection voltage corresponding to the VGH voltage is expressed as VGH -DET , which can be expressed as VGH represents the VGH power supply voltage. In this embodiment, the resistance values ​​of the first resistor R1 and the second resistor R2 can be set to match the VGH power supply voltage of the actual display screen, and are not limited here. In this embodiment, the VGH voltage can be detected by using two resistors, greatly reducing hardware costs.

[0027] Optional, Figure 3 Schematic diagram of a VGH detection circuit in this embodiment. Figure 3 As shown, the VGH detection circuit further includes a capacitor, a first end of which is connected to the MCU, and a second end of which is grounded. In this embodiment, adding capacitor C to the VGH detection circuit can prevent jitter of the VGH detection circuit.

[0028] Optional, Figure 4 Schematic diagram of a VGH detection circuit in this embodiment. Figure 4As shown, the VGH detection circuit also includes two diodes: a first diode D1 and a second diode D2. The anode of the first diode D1 is grounded, and the cathode of the first diode D1 is connected to the MCU. The anode of the second diode D2 is connected to the MCU, and the cathode of the second diode D2 is connected to the system power supply. In this embodiment, by providing two diodes in the VGH detection circuit, the MCU can be protected from high voltage damage.

[0029] Optional, Figure 5 Schematic diagram of a VGH detection circuit in this embodiment. Figure 5 As shown, the VGL detection circuit includes a third resistor R3 and a fourth resistor R4. The first end of the third resistor R3 is connected to the reference power supply, and the second end of the third resistor R3 is connected to the MCU; the first end of the fourth resistor R4 is connected to the VGL power supply, and the second end of the fourth resistor R4 is connected to the MCU.

[0030] The reference power supply is VGH power supply or VSP power supply. Figure 5 It can be seen that the VGL power supply voltage is offset by the reference voltage, and the third resistor R3 and the second resistor R4 are used for voltage division, and the offset and divided voltage (i.e., the detection voltage) is input to the MCU. Assuming that the reference power supply is the VGH power supply, the detection voltage corresponding to the VGL voltage is expressed as VGL -DET , which can be expressed as Similarly, assuming that the reference power supply is the VSP power supply, the detection voltage corresponding to the VGL voltage can be expressed as: In this embodiment, the resistance values ​​of the third resistor R3 and the fourth resistor R4 can be matched and set according to the actual VGH power supply voltage of the display screen, which is not limited here. In this embodiment, the VGL voltage can be detected by two resistors, which greatly reduces the hardware cost.

[0031] Optional, Figure 6 FIG. 1 is a schematic diagram of a VGL detection circuit in this embodiment. Figure 6 As shown, the VGL detection circuit further includes a capacitor, a first end of which is connected to the MCU, and a second end of which is grounded. In this embodiment, adding capacitor C to the VGL detection circuit can prevent jitter of the VGH detection circuit.

[0032] Optional, Figure 7 FIG. 1 is a schematic diagram of a VGL detection circuit in this embodiment. Figure 7As shown, the VGL detection circuit also includes two diodes: a first diode D1 and a second diode D2. The anode of the first diode D1 is grounded, and the cathode of the first diode D1 is connected to the MCU. The anode of the second diode D2 is connected to the MCU, and the cathode of the second diode D2 is connected to the system power supply. In this embodiment, by providing two diodes in the VGL detection circuit, the MCU can be protected from high voltage damage.

[0033] Optional, Figure 8 FIG. 1 is a schematic diagram of a VSP detection circuit in this embodiment. Figure 8 As shown, the VSP detection circuit includes a fifth resistor R5 and a sixth resistor R6; the first end of the fifth resistor R5 is connected to the VSP power supply, and the second end of the fifth resistor R5 is connected to the MCU; the first end of the sixth resistor R6 is connected to the MCU, and the second end of the sixth resistor R6 is grounded. Figure 8 It can be seen that the VSP power supply voltage is divided by the fifth resistor R5 and the sixth resistor R6, and the divided voltage (i.e., the detection voltage) is input to the MCU. Assume that the detection voltage corresponding to the VSP voltage is expressed as VSP -DET , which can be expressed as VSP represents the VSP power supply voltage. In this embodiment, the resistance values ​​of the fifth resistor R5 and the sixth resistor R6 can be matched and set according to the actual VSP power supply voltage of the display screen, which is not limited here. In this embodiment, the detection of the VSP voltage can be achieved through two resistors, which greatly reduces the hardware cost. In this embodiment, in order to prevent the jitter of the VSP detection circuit, a capacitor C can be added to the VSP detection circuit. The first end of the capacitor is connected to the MCU, and the second end of the capacitor is grounded. Its structure diagram is the same as Figure 3 Similarly, it will not be repeated here. In this embodiment, in order to protect the MCU and prevent high voltage from damaging the MCU, two diodes can be added to the VSP detection circuit, namely a first diode and a second diode; the positive electrode of the first diode is grounded, and the cathode of the first diode is connected to the MCU; the positive electrode of the second diode is connected to the MCU, and the cathode of the second diode is connected to the system power supply. The structural diagram of the added diode is similar to Figure 4 Similarly, it will not be repeated here.

[0034] Optional, Figure 9 FIG. 1 is a schematic diagram of a VSN detection circuit provided by an embodiment of the present invention. Figure 9 As shown, the VSN power detection circuit includes a seventh resistor R7 and an eighth resistor R8. The first end of the seventh resistor R7 is connected to the reference power supply, and the second end of the seventh resistor R7 is connected to the MCU. The first end of the eighth resistor R8 is connected to the VSN power supply, and the second end of the eighth resistor R8 is connected to the MCU.

[0035] The reference power supply is VGH power supply or VSP power supply. Figure 9 It can be seen that the VSN power supply voltage is offset by the reference voltage, and the seventh resistor R7 and the eighth resistor R8 are used for voltage division, and the offset and divided voltage (i.e., the detection voltage) is input to the MCU. Assuming that the reference power supply is the VGH power supply, the detection voltage corresponding to the VSN voltage is expressed as VSN -DET , which can be expressed as Similarly, assuming that the reference power supply is the VSP power supply, the detection voltage corresponding to the VGL voltage can be expressed as: In this embodiment, the resistance values ​​of the seventh resistor R7 and the eighth resistor R8 can be matched and set according to the actual VSN power supply voltage of the display screen, which is not limited here. In this embodiment, the VSN voltage can be detected by two resistors, which greatly reduces the hardware cost.

[0036] Optionally, in order to prevent the jitter of the VSN detection circuit, a capacitor C can be added to the VSN detection circuit. The first end of the capacitor is connected to the MCU, and the second end of the capacitor is grounded. Its structure diagram is similar to Figure 6 Similarly, it will not be repeated here. In this embodiment, in order to protect the MCU and prevent high voltage from damaging the MCU, two diodes can be added to the VSN detection circuit, namely the first diode and the second diode; the positive electrode of the first diode is grounded, and the cathode of the first diode is connected to the MCU; the positive electrode of the second diode is connected to the MCU, and the cathode of the second diode is connected to the system power supply. The structural diagram of the added diode is similar to Figure 7 Similarly, it will not be repeated here.

[0037] The vehicle display screen bias voltage detection system disclosed in this embodiment includes: a VGH detection circuit, a VGL detection circuit, a VSP detection circuit, a VSN detection circuit, and an MCU; the voltage output terminals of the VGH detection circuit, the VGL detection circuit, the VSP detection circuit, and the VSN detection circuit are respectively connected to the microprocessor MCU via a GPIO interface; the VGH detection circuit is used to input the VGH detection voltage to the MCU; the VGL detection circuit is used to input the VGL detection voltage to the MCU; the VSP detection circuit is used to input the VSP detection voltage to the MCU; and the VSN detection circuit is used to input the VSN detection voltage to the MCU; the MCU is used to execute the vehicle display screen bias voltage detection method described in this embodiment. This system can not only accurately detect the power supply bias voltage of the vehicle display screen, but also detect even small fluctuations in the bias supply voltage, thereby improving detection accuracy and reducing hardware costs.

[0038] Example 2

[0039] Figure 10 This is a flow chart of a method for detecting the bias voltage of a vehicle display screen provided by an embodiment of the present invention. This embodiment is applicable to detecting and diagnosing the bias voltage of a vehicle display screen. The method can be executed by a detection device for the bias voltage of a vehicle display screen. The device can be implemented in the form of software and / or hardware. Optionally, it can be implemented by an electronic device, which can be an MCU, a mobile terminal, a PC, or a server. Figure 10 As shown, the specific steps include:

[0040] S110, obtaining a detection voltage and detection circuit information corresponding to the detection voltage.

[0041] The detection voltage includes at least one of the detection voltages corresponding to the gate high voltage VGH, the gate low voltage VGL, the source positive voltage VSP, and the source negative voltage VSN. The detection circuit information may include information about the components included in the circuit and the connection relationship between the components. The detection voltage corresponding to the VGH voltage may be a voltage detected by the VGH detection circuit, the detection voltage corresponding to the VGL voltage may be a voltage electrically measured by the VGL detection circuit, the detection voltage corresponding to the VSP voltage may be a voltage electrically measured by the VSP detection circuit, and the detection voltage corresponding to the VSN voltage may be a voltage electrically measured by the VSN detection circuit. The specific structure of each detection circuit can be referred to in the above embodiment and will not be repeated here.

[0042] Step 120 : determining a power supply bias voltage according to the detection voltage and detection circuit information corresponding to the detection voltage.

[0043] The power supply bias voltage includes at least one of VGH, VGL, VSP, and VSN. The detection circuit information corresponding to VGH includes a first resistor and a second resistor. The detection circuit information corresponding to VGL includes a reference detection voltage, detection circuit information corresponding to the reference detection voltage, a third resistor, and a fourth resistor. The detection circuit information corresponding to VSP includes a fifth resistor and a sixth resistor. The detection circuit information corresponding to VSN includes a reference detection voltage, detection circuit information corresponding to the reference detection voltage, a seventh resistor, and an eighth resistor. The reference detection voltage is the detection voltage corresponding to VGH or the detection voltage corresponding to VSP.

[0044] Optionally, the power bias voltage may be determined according to the detection voltage and the detection circuit information corresponding to the detection voltage by: determining VGH according to the detection voltage corresponding to VGH, the first resistor, and the second resistor.

[0045] Specifically, the calculation formula of VGH can be expressed as:

[0046] Optionally, the power supply bias voltage may be determined based on the detection voltage and the detection circuit information corresponding to the detection voltage by determining VGL based on the detection voltage corresponding to VGL, the third resistor, the fourth resistor, the reference detection voltage, and the detection circuit information corresponding to the reference detection voltage. Specifically, if the detection reference voltage is VGH, the calculation formula for VGL may be expressed as: Specifically, if the detection reference voltage is VSP voltage, the calculation formula of VGL can be expressed as:

[0047] Optionally, the power supply bias voltage may be determined based on the detection voltage and the detection circuit information corresponding to the detection voltage by determining VSP based on the detection voltage corresponding to VSP, the fifth resistor, and the sixth resistor. Specifically, the calculation formula for VSP may be expressed as:

[0048] Optionally, the power supply bias voltage may be determined based on the detection voltage and the detection circuit information corresponding to the detection voltage by determining VSN based on the detection voltage corresponding to VSN, the seventh resistor, the eighth resistor, the reference detection voltage, and the detection circuit information corresponding to the reference detection voltage. Specifically, if the detection reference voltage is VGH, the calculation formula for VSN may be expressed as: Specifically, if the detection reference voltage is VSP voltage, the calculation formula of VGL can be expressed as:

[0049] Optionally, after determining VGH, VGL, VSP and VSN, the fluctuation of VGH power supply, VGL power supply, VSP power supply and VSN power supply can be judged according to the specific values ​​of VGH, VGL, VSP and VSN to realize the diagnosis of the bias power supply of the vehicle display.

[0050] The technical solution of this embodiment obtains a detection voltage and detection circuit information corresponding to the detection voltage; wherein the detection voltage includes at least one of the detection voltages corresponding to the gate high voltage VGH, the gate low voltage VGL, the source positive voltage VSP, and the source negative voltage VSN; and determines a power supply bias voltage based on the detection voltage and the detection circuit information corresponding to the detection voltage; wherein the power supply bias voltage includes at least one of VGH, VGL, VSP, and VSN. The method for detecting the bias voltage of an in-vehicle display provided in this embodiment of the present invention determines VGH, VGL, VSP, and VSN based on the detection voltages corresponding to VGH, VGL, VSP, and VSN and the detection circuit information. This method can accurately detect the power supply bias voltage of the in-vehicle display, even detecting small fluctuations in the bias supply voltage, thereby improving detection accuracy.

[0051] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0052] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for detecting bias voltage of a vehicle display screen, characterized in that: include: Acquire a detection voltage and detection circuit information corresponding to the detection voltage; wherein the detection voltage includes at least one of the detection voltages corresponding to the gate high voltage VGH, the gate low voltage VGL, the source positive voltage VSP, and the source negative voltage VSN; A power supply bias voltage is determined according to the detection voltage and detection circuit information corresponding to the detection voltage; wherein the power supply bias voltage includes at least one of VGH, VGL, VSP and VSN.

2. The method according to claim 1, characterized in that The detection circuit information corresponding to VGH includes a first resistor and a second resistor; the detection circuit information corresponding to VGL includes a reference detection voltage, detection circuit information corresponding to the reference detection voltage, a third resistor, and a fourth resistor; the detection circuit information corresponding to VSP includes a fifth resistor and a sixth resistor; The detection circuit information corresponding to VSN includes a reference detection voltage, detection circuit information corresponding to the reference detection voltage, a seventh resistor, and an eighth resistor; the reference detection voltage is the detection voltage corresponding to VGH or the detection voltage corresponding to VSP.

3. The method according to claim 2, characterized in that Determining a power supply bias voltage according to the detection voltage and detection circuit information corresponding to the detection voltage includes: Determine the VGH according to the detection voltage corresponding to the VGH, the first resistor, and the second resistor; or Determine the VGL according to the detection voltage corresponding to the VGL, the third resistor, the fourth resistor, the reference detection voltage, and detection circuit information corresponding to the reference detection voltage; or Determine the VSP according to the detection voltage corresponding to the VSP, the fifth resistor, and the sixth resistor; or The VSN is determined according to a detection voltage corresponding to the VSN, the seventh resistor, the eighth resistor, the reference detection voltage, and detection circuit information corresponding to the reference detection voltage.

4. A detection system for bias voltage of a vehicle display screen, characterized in that: include: VGH detection circuit, VGL detection circuit, VSP detection circuit, VSN detection circuit and microprocessor MCU; the voltage output end of the VGH detection circuit, the voltage output end of the VGL detection circuit, the voltage output end of the VSP detection circuit and the voltage output end of the VSN detection circuit are respectively connected to the microprocessor MCU through the GPIO interface; The VGH detection circuit is used to input the detection voltage of the VGH into the MCU; the VGL detection circuit is used to input the detection voltage of the VGL into the MCU; the VSP detection circuit is used to input the detection voltage of the VSP into the MCU; The VSN detection circuit is used to input the VSN detection voltage to the MCU; The MCU is used to execute the method for detecting the bias voltage of the vehicle display screen described in any one of claims 1-3.

5. The system according to claim 4, characterized in that The VGH detection circuit includes a first resistor and a second resistor; A first end of the first resistor is connected to the VGH power supply, and a second end of the first resistor is connected to the MCU; a first end of the second resistor is connected to the MCU, and a second end of the second resistor is grounded.

6. The system according to claim 4, characterized in that The VGL detection circuit includes a third resistor and a fourth resistor; A first end of the third resistor is connected to a reference power supply, and a second end of the third resistor is connected to the MCU; wherein the reference power supply is a VGH power supply or a VSP power supply; A first end of the fourth resistor is connected to the VGL power supply, and a second end of the fourth resistor is connected to the MCU.

7. The system according to claim 4, wherein: The VSP detection circuit includes a fifth resistor and a sixth resistor; A first end of the fifth resistor is connected to the VSP power supply, and a second end of the fifth resistor is connected to the MCU; a first end of the sixth resistor is connected to the MCU, and a second end of the sixth resistor is grounded.

8. The system according to claim 4, wherein: The VSN detection circuit includes a seventh resistor and an eighth resistor; A first end of the seventh resistor is connected to a reference power supply, and a second end of the seventh resistor is connected to the MCU; wherein the reference power supply is a VGH power supply or a VSP power supply; A first end of the eighth resistor is connected to the VSN power supply, and a second end of the eighth resistor is connected to the MCU.

9. The system according to claim 4, wherein: One or more of the VGH detection circuit, the VGL detection circuit, the VSP detection circuit, and the VSN detection circuit further include a capacitor; a first end of the capacitor is connected to the MCU, and a second end of the capacitor is grounded.

10. The system according to claim 4, wherein: One or more of the VGH detection circuit, the VGL detection circuit, the VSP detection circuit, and the VSN detection circuit further include a first diode and a second diode; The anode of the first diode is grounded, and the cathode of the first diode is connected to the MCU; the anode of the second diode is connected to the MCU, and the cathode of the second diode is connected to the system power supply.

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