Vehicle-mounted display screen abnormity monitoring system and method and display device

Abstract

The invention provides a vehicle-mounted display screen abnormity monitoring system and method and a display device, and the system comprises a power monitoring assembly which is used for monitoring the abnormal state of a power supply of a display screen in real time after a vehicle-mounted host powers on the display screen and outputting an enable signal to a deserializer; the deserializer is used for starting to operate according to the enable signal and outputting a lock signal to a vehicle-mounted host; the vehicle-mounted host is used for configuring the deserializer and the abnormity monitoring component after receiving the lock signal; and the abnormity monitoring component is used for monitoring the working state of each component of the display screen in real time, so that when the working state of any component is detected to be an abnormal state, a corresponding abnormity processing operation is adopted. According to the technical scheme, the problem that the vehicle-mounted display screen depends on the MCU is solved, the development cost generated by function development is reduced, the development process is simplified, the system is easier to integrate and maintain, and the reliability of the system is improved.

Description

Technical Field

[0001] The present application belongs to the field of automotive electronic technology, and specifically relates to a vehicle-mounted display screen abnormality monitoring system, method and display device. Background Art

[0002] In traditional designs, cameras are usually used as independent samples, while the host and display are usually integrated into one sample, forming two main components. As the space inside the car becomes increasingly compact and consumers have high requirements for the interior layout of the car, the camera, host and display are gradually divided into independent samples. This separation design facilitates the optimization of the interior layout and helps to outsource different components to different suppliers for independent development, thereby improving development efficiency.

[0003] However, when the host and the display are arranged separately, the host cannot directly control the power-on sequence of the display, and usually needs to add an MCU (microcontroller unit) to the display to perform timing control. However, this design faces two significant problems: first, many car manufacturers regard electronic rearview mirrors as safety-critical parts and require their development process to comply with the functional safety standard ISO26262, which means that the functional safety development of MCUs will incur expensive development costs; second, the introduction of MCUs increases the complexity of the system, thereby increasing the difficulty and cost of development. Summary of the invention

[0004] In response to the above technical problems, this technology innovatively proposes a vehicle display abnormality monitoring system, method and display device, aiming to solve the current technical problem of excessive reliance on MCU for vehicle display screens, reduce the functional development cost of vehicle display screens, make the vehicle display screen system easier to integrate and maintain, and improve system reliability.

[0005] Specifically, the present application proposes a vehicle display screen abnormality monitoring system, comprising: The power monitoring component is used to monitor the abnormal power status of the display screen in real time and output an enable signal to the deserializer after the vehicle host powers on the display screen.

[0006] The deserializer is used to start running according to the enable signal and output a lock signal to the vehicle-mounted host.

[0007] The vehicle-mounted host is used to configure the deserializer and the abnormality monitoring component after receiving the lock signal.

[0008] Furthermore, the abnormality monitoring component is used to monitor the working status of each component of the display screen in real time, so as to take corresponding abnormality handling operations when it is detected that the working status of any component is abnormal.

[0009] In the above technical solution, the MCU in the traditional vehicle display screen is replaced by the power monitoring component and the abnormality monitoring component, which significantly reduces the system complexity and development cost. The working status of each component in the system power supply and the vehicle display screen is monitored by the power monitoring component and the abnormality monitoring component, ensuring the normal operation of the system and the stability and safety of the vehicle display screen under various working conditions. When an abnormality is detected in the system, the corresponding abnormality handling operation is taken to reduce the safety accidents caused by the occurrence of abnormalities in the vehicle display screen, thereby improving driving safety.

[0010] As an implementation mode, the vehicle-mounted host includes at least a SOC module and a serializer, and the SOC module is connected to the serializer, deserializer and the abnormality monitoring component through an IIC bus, and is used to monitor the working status of the abnormality monitoring component according to the IIC bus.

[0011] The SOC module monitors the working status of the abnormal monitoring component through the IIC bus, which improves the integration and management efficiency of the system. Through the connection of the IIC bus, real-time monitoring of the abnormal status of the abnormal monitoring component can be achieved, potential problems can be discovered and responded to in a timely manner, and the safety and reliability of the system can be enhanced. The use of serializers and deserializers simplifies the data transmission process, reduces the hardware complexity of the system, and improves the stability of data transmission.

[0012] Furthermore, the SOC module is also used to monitor the working state of the deserializer by monitoring the lock signal, and when the lock signal is abnormal, stop the power-on operation of the display screen.

[0013] When the lock signal is detected to be abnormal, the SOC module immediately stops the power-on operation of the display screen to prevent the display screen from working in an unstable or abnormal state, thereby protecting the equipment and system. This measure can effectively avoid potential safety hazards and ensure that the information display during driving is safe and reliable.

[0014] Furthermore, the abnormal monitoring component is also used to output a dog feeding signal according to the working status of each component; wherein each component at least includes a backlight power supply, an LED power supply and a display component.

[0015] The abnormal monitoring component outputs a dog-feeding signal by monitoring the working status of each component. When a component fails, the dog-feeding signal will not be output as expected. The system can identify and take measures in time, thereby improving the reliability of the system. Timely status feedback helps the system maintain stable operation, avoids the failure of the entire display system due to the failure of a component, and enhances the stability of the system. By monitoring the working status of each component, the normal operation of the vehicle display system can be ensured, the decline in user experience caused by failures can be reduced, and accurate communication of information can be ensured.

[0016] Furthermore, the abnormal monitoring component is also used to control the timing of the display component. By replacing the MCU with the abnormal monitoring component to control the timing of the display component, the complexity of the system is reduced. The accurate timing output of the display signal is ensured, thereby improving the stability and consistency of the display effect. By accurately controlling the timing, the delay of the display response is reduced, and the user experience is improved.

[0017] Furthermore, the system also includes a functional safety LED and a backlight LED.

[0018] The functional safety LED is used to provide abnormal feedback when an abnormality occurs in the LED power supply.

[0019] The backlight LED is used to provide abnormal feedback when an abnormality occurs in the backlight power supply.

[0020] The abnormal feedback of the functional safety LED and backlight LED can timely alert users or maintenance personnel, reduce the potential safety hazards caused by power failure, and enhance the safety of the system. Through real-time abnormal feedback, real-time monitoring of the power status is achieved, which helps to take corresponding measures in time when abnormalities occur, and can help maintenance personnel quickly locate the source of the fault, thereby improving maintenance efficiency and reducing system downtime.

[0021] Furthermore, the system also includes a watchdog for detecting in real time a dog feeding signal output by the abnormal monitoring component. When no dog feeding signal is detected, a low level is output to turn off the backlight power supply or LED power supply and turn on the functional safety LED or backlight LED.

[0022] The watchdog detects the dog feeding signal output by the abnormal monitoring component in real time, ensuring the normal operation of the system. When the dog feeding signal is not detected, the watchdog will immediately output a low level and actively turn off the backlight power supply or LED power supply, reducing potential damage or safety hazards. When an abnormality occurs, the watchdog turns on the functional safety LED or backlight LED, and the system can respond quickly in abnormal situations, improving the stability and reliability of the system.

[0023] Based on the same inventive concept, the present application also proposes a method for an abnormal monitoring system for a vehicle display screen, the method comprising: After the vehicle host powers on the display, it monitors the power status of the display in real time through the power monitoring component and outputs an enable signal to the deserializer.

[0024] The deserializer operates according to the enable signal and outputs a lock signal to the vehicle host, so that the deserializer and the abnormal monitoring component are configured by the vehicle host.

[0025] The abnormal monitoring component is used to monitor the working status of each component of the display screen in real time, so that when the working status of any component is detected to be abnormal, a corresponding abnormal processing operation is taken.

[0026] Furthermore, the power monitoring component monitors the power status of the display screen in real time. When the power supply of the display screen is abnormal, the power monitoring component outputs a low level to shut down the deserializer and the display screen power supply.

[0027] By monitoring the power status of the vehicle-mounted display screen in real time through the power monitoring component, corresponding measures can be taken in time when the power supply of the vehicle-mounted display screen is abnormal, thereby improving the safety and reliability of the system.

[0028] Based on the same inventive concept, the present application also proposes a vehicle-mounted display device, in which an abnormality monitoring system is configured, and the abnormality monitoring system adopts the vehicle-mounted display screen abnormality monitoring method.

[0029] Compared with the prior art, this application has at least the following beneficial effects: The vehicle display screen abnormality monitoring system proposed in this application provides an effective solution for the vehicle display screen's over-reliance on the MCU in actual application, reduces the system's complexity and development costs, and ensures the stability, safety and reliability of the vehicle display screen under various working conditions by real-time monitoring of the system power supply and the working status of each component in the system through the power monitoring component and the abnormality monitoring component. When an abnormality is detected in a component in the system, the corresponding abnormality handling operation is taken to reduce safety accidents caused by the occurrence of abnormal vehicle display screens and improve driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a vehicle display abnormality monitoring system shown in an embodiment of the present application.

[0031] Figure 2 It is a flow chart of a method for monitoring abnormality of a vehicle display screen shown in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Embodiment 1: Please refer to Figure 1 , the vehicle display abnormality monitoring system mainly includes: The power monitoring component is used to monitor the abnormal power status of the display screen in real time and output an enable signal to the deserializer after the vehicle-mounted host powers on the display screen. The power supply voltage and current status of the display screen are monitored in real time by the power monitoring component to ensure that the power supply voltage and current of the display screen are within a safe working range. When the power supply of the display screen is abnormal, the power monitoring component turns off the deserializer and power supply by outputting a low level. For example, when the power monitoring component detects that the power supply of the display screen is overvoltage, undervoltage or short-circuited, it controls the deserializer to stop working by outputting a low level. Only after confirming that the power supply of the display screen is normal, the power monitoring component will output an enable signal to the deserializer to allow it to start working.

[0034] The deserializer is used to start running according to the enable signal and output a lock signal to the vehicle-mounted host. After the deserializer receives the enable signal, it ensures that the current power supply is stable and meets the working conditions before starting. The deserializer can mainly convert the input serial data into parallel data or convert parallel data into serial data. The lock signal is mainly used to indicate that the vehicle-mounted host can currently receive data safely, ensuring the stability and consistency of data transmission. When the deserializer is abnormal, it stops transmitting the lock signal to the vehicle-mounted host, and the vehicle-mounted host can detect the abnormal state of the deserializer.

[0035] The vehicle-mounted host is used to configure the deserializer and the abnormal monitoring component after receiving the lock signal. When the vehicle-mounted host receives the lock signal, the vehicle-mounted host confirms that the current deserializer has been successfully started and is in normal working condition. Among them, the configuration of the deserializer can mainly include setting the data transmission rate and protocol type of the deserializer, such as CAN (Controller Area Network) and LIN (Local Interconnect Network). Configure the data format and verification method of the deserializer to ensure the reliability of data transmission. The configuration of the abnormal monitoring component can mainly include configuring the monitoring parameters of the abnormal monitoring component, such as power supply voltage, temperature and data transmission status, and starting the fault detection algorithm in the abnormal monitoring component to monitor the working status of each component in the vehicle-mounted display screen.

[0036] And, the abnormal monitoring component is used to monitor the working status of each component of the display screen in real time, so as to take corresponding abnormal processing operations when the working status of any component is detected to be abnormal. The abnormal monitoring component can mainly be an IO expansion component (Input / Output Expansion Component). The various components can mainly include a backlight power supply, an LCD (Liquid Crystal Display) module, and an LED (Light Emitting Diode) power supply.

[0037] In some embodiments, the vehicle-mounted host includes at least a SOC module and a serializer, and the SOC module is connected to the serializer, the deserializer and the abnormal monitoring component through an IIC bus, and is used to monitor the working state of the abnormal monitoring component according to the IIC bus. The SOC module can mainly integrate multiple components, such as a processor, a memory and a variety of peripheral interfaces, and the data of different components can be processed through the SOC module.

[0038] The serializer can convert the received data into serial data and transmit it through the IIC (Inter-Integrated Circuit) bus. The deserializer receives the serial data transmitted by the serializer and converts the serial data into parallel data. The abnormal monitoring component is connected to the SOC module through the IIC bus, and can feed back the monitoring data to the SOC module in real time to realize automatic monitoring and alarm functions.

[0039] The abnormal monitoring component takes the IO expansion component as an example. The SOC module communicates with the IO expansion component through the IIC bus via a serializer and a deserializer, and monitors the working status of the IO expansion component according to the IIC bus.

[0040] Optionally, the SOC module is further used to monitor the working state of the deserializer by monitoring the lock signal, and when the lock signal is abnormal, stop the power-on operation of the display screen. When the SOC module receives the lock signal, it indicates that the deserializer is in a normal working state. When the SOC module does not receive the lock signal, it indicates that the deserializer is not in a normal working state. When it is detected that the deserializer is in an abnormal working state, an instruction is issued through the SOC module to stop the power-on operation of the display screen.

[0041] Optionally, the abnormal monitoring component is also used to output a dog feeding signal according to the working status of each component; wherein the components at least include a backlight power supply, an LED power supply and a display component. The dog feeding signal is mainly a pulse signal sent periodically, which is used to monitor the working status of each component. For example, when the working status of each component of the display screen is normal, the abnormal monitoring component will regularly output the dog feeding signal to the watchdog component. For example, when an abnormality occurs in a component in the display screen, the abnormal monitoring component will stop outputting the dog feeding signal, thereby triggering a corresponding protection mechanism.

[0042] Optionally, the abnormality monitoring component is also used to control the timing of the display component.

[0043] The timing control of the display component refers to the precise management of the time, frequency and duration of the display signal to ensure the clarity and response speed of the displayed content. In actual application, the abnormal monitoring component will generate corresponding timing signals according to actual needs, which may mainly include horizontal synchronization signals, vertical synchronization signals and data validity signals. The refresh rate and data transmission rate of the display screen are controlled according to the timing signals. During the operation of the display component, the abnormal monitoring component will monitor the display status in real time and adjust the display timing according to the external environment. For example, the brightness and contrast are automatically adjusted according to changes in external light and the timing of signal transmission is adjusted accordingly.

[0044] Optionally, the system further comprises a functional safety LED and a backlight LED.

[0045] The functional safety LED is used to provide abnormal feedback when an abnormality occurs in the LED power supply.

[0046] The backlight LED is used to provide abnormal feedback when an abnormality occurs in the backlight power supply.

[0047] When an abnormality is detected in the LED power supply of the vehicle display, the functional safety LED will provide abnormal feedback by flashing, lighting up or changing color. For example, when an overvoltage, undervoltage or power failure is detected in the LED power supply, the color of the functional safety LED light changes from green to red and flashes, providing feedback on the abnormal state of the LED power supply.

[0048] When an abnormality is detected in the backlight power supply, the backlight LED can automatically reduce the brightness or completely turn off to feedback the abnormal state of the backlight power supply to the user. In the specific implementation process, the backlight LED can be linked with other warning systems, for example, triggering a sound alarm or displaying a warning message on the vehicle display screen at the same time.

[0049] Optionally, the system also includes a watchdog for detecting a dog feeding signal output by the abnormal monitoring component in real time. When no dog feeding signal is detected, a low level is output to turn off the backlight power supply or LED power supply and turn on the functional safety LED or backlight LED.

[0050] Through the setting of the watchdog component, when any component in the vehicle-mounted display screen has an abnormality, the abnormal monitoring component stops outputting the dog feeding signal. The watchdog component takes corresponding abnormal processing operations after detecting the dog feeding signal to ensure the normal operation of the vehicle-mounted display screen and the reliability and stability of the system.

[0051] When the watchdog is able to receive the dog feeding signal output by the abnormal monitoring component, it indicates that the vehicle display screen is currently in normal working state. When the watchdog component does not receive the dog feeding signal within the preset time range, it indicates that the current vehicle display screen is faulty. At this time, the watchdog component will trigger corresponding protection measures. For example, when the LED power supply is abnormal, the abnormal monitoring component will stop outputting the dog feeding signal. If the watchdog component does not receive the dog feeding signal, the watchdog will output a low level to turn off the LED power supply and provide abnormal feedback through the functional safety LED. Those skilled in the art can select other components to take corresponding exception handling operations according to actual conditions, and are not limited to the watchdog component in this case.

[0052] In the specific implementation process, when the power supply of the vehicle display screen is abnormal, the power monitoring component turns off the deserializer by outputting a low level, and the deserializer stops transmitting the lock signal to the vehicle host. The vehicle host detects the abnormality of the deserializer and stops the power-on operation of the vehicle display screen, thereby improving the reliability and safety of the operation of the vehicle display screen. When the backlight power supply is abnormal, the abnormality monitoring component stops outputting the dog feeding signal when detecting the abnormality. When the watchdog component does not detect the dog feeding signal within the specified time, it turns off the backlight power supply and provides abnormal feedback through the backlight LED.

[0053] Embodiment 2: Please refer to Figure 2 , the present application also proposes a method for monitoring abnormality of a vehicle display screen, which mainly includes: After the vehicle host powers on the display screen, the power monitoring component monitors the power status of the display screen in real time and outputs an enable signal to the deserializer. After the vehicle display screen is powered on, the power monitoring component starts working and monitors the power supply voltage and current status of the vehicle display screen in real time to ensure that they are within the normal range. When the power monitoring component confirms that the power supply of the vehicle display screen is normal, it outputs an enable signal to the deserializer, indicating that it can start data transmission and control work.

[0054] The deserializer operates according to the enable signal and outputs a lock signal to the vehicle host, so that the deserializer and the abnormal monitoring component can be configured by the vehicle host. After receiving the enable signal, the deserializer starts the data deserialization and processing process to ensure that the data is smoothly transmitted from the vehicle host to the display component of the vehicle display. After the deserializer successfully operates, it will output a lock signal to the vehicle host, indicating that it is ready and can be further configured.

[0055] The abnormal monitoring component monitors the working status of each component of the display screen in real time, so that when the working status of any component is detected to be abnormal, the corresponding abnormal processing operation is taken. The abnormal monitoring component monitors the working status of each component of the vehicle display screen, including the display component, the backlight power supply and the LED power supply, to ensure the normal operation of each component. When the working status of any component is detected to be abnormal, the abnormal monitoring component will perform the corresponding abnormal processing operation. For example, when the current of the backlight power supply is detected to be too high, the abnormal monitoring component will control the watchdog component to turn off the backlight power supply and provide abnormal feedback through the backlight LED.

[0056] The abnormality handling operation may also include sending an alarm to the host, recording abnormal information, and shutting down corresponding components. Those skilled in the art may select corresponding abnormality handling operations according to actual application scenarios, and are not limited thereto.

[0057] Optionally, the power status of the display screen is monitored in real time by the power monitoring component. When the power supply of the display screen is abnormal, the deserializer and the display screen power are turned off by outputting a low level by the power monitoring component.

[0058] The power monitoring component has high-frequency data acquisition capabilities and can monitor key parameters such as the power supply voltage and current of the vehicle display in real time. By setting reasonable thresholds, the system can promptly identify potential abnormal conditions, mainly including: overvoltage protection, undervoltage protection, and overcurrent protection. For example, when it is detected that the power supply voltage of the vehicle display exceeds the safe range, the power monitoring component will output a low level to shut down the deserializer and the vehicle display power supply.

[0059] Embodiment three: The present application also proposes a vehicle-mounted display device, in which the vehicle-mounted display screen abnormality monitoring system is configured.

[0060] The vehicle display device is integrated with a vehicle display screen abnormality monitoring system to ensure reliability and safety in various driving environments. Through the vehicle display screen abnormality monitoring system, the vehicle display device can monitor the working status of the display screen in real time, including key parameters such as power supply voltage, current and signal quality. When starting the vehicle display screen, a comprehensive hardware and software check will be performed to ensure that all components are operating normally.

[0061] In summary, the technical content proposed in this application provides an effective solution for the excessive reliance of the vehicle display screen on the MCU during actual application, reduces the complexity and development cost of the system, and ensures the stability, safety and reliability of the vehicle display screen under various working conditions by real-time monitoring of the system power supply and the working status of each component in the system through the power monitoring component and the abnormality monitoring component. When an abnormality is detected in a component in the system, the corresponding abnormality handling operation is taken to reduce the safety accidents caused by the abnormality of the vehicle display screen and improve driving safety.

[0062] In several embodiments provided in the present application, it is understood that each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved.

[0063] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can essentially or in other words, the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for an electronic device to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0064] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle display screen abnormality monitoring system, characterized in that: include: The power monitoring component is used to monitor the abnormal power status of the display screen in real time and output an enable signal to the deserializer after the vehicle host powers on the display screen; The deserializer is used to start running according to the enable signal and output a lock signal to the vehicle host; The vehicle-mounted host is used to configure the deserializer and the abnormality monitoring component after receiving the lock signal; Furthermore, the abnormality monitoring component is used to monitor the working status of each component of the display screen in real time, so as to take corresponding abnormality handling operations when it is detected that the working status of any component is abnormal.

2. The vehicle display screen abnormality monitoring system according to claim 1 is characterized in that: The vehicle-mounted host at least includes a SOC module and a serializer. The SOC module is connected to the serializer, the deserializer and the abnormality monitoring component through an IIC bus, and is used to monitor the working status of the abnormality monitoring component according to the IIC bus.

3. The vehicle display screen abnormality monitoring system according to claim 2 is characterized in that: The SOC module is further used to monitor the working state of the deserializer by monitoring the lock signal, and when the lock signal is abnormal, stop the power-on operation of the display screen.

4. The vehicle-mounted display screen abnormality monitoring system according to claim 1, characterized in that: The abnormal monitoring component is also used to output a dog feeding signal according to the working status of each component; wherein each component at least includes a backlight power supply, an LED power supply and a display component.

5. The vehicle-mounted display screen abnormality monitoring system according to claim 4, characterized in that: The abnormal monitoring component is also used to control the timing of the display component.

6. The vehicle-mounted display screen abnormality monitoring system according to claim 4, characterized in that: The system also includes a functional safety LED and a backlight LED; The functional safety LED is used to provide abnormal feedback when an abnormality occurs in the LED power supply; The backlight LED is used to provide abnormal feedback when an abnormality occurs in the backlight power supply.

7. The vehicle-mounted display screen abnormality monitoring system according to claim 4, characterized in that: The system also includes a watchdog for detecting in real time a dog feeding signal output by the abnormal monitoring component. When no dog feeding signal is detected, a low level is output to turn off the backlight power supply or LED power supply and turn on the functional safety LED or backlight LED.

8. A method for monitoring abnormality of a vehicle display screen according to claims 1-7, characterized in that: include: After the vehicle host powers on the display, it monitors the power status of the display in real time through the power monitoring component and outputs an enable signal to the deserializer; The deserializer operates according to the enable signal and outputs a lock signal to the vehicle host, so as to configure the deserializer and the abnormal monitoring component through the vehicle host; The abnormal monitoring component is used to monitor the working status of each component of the display screen in real time, so that when the working status of any component is detected to be abnormal, a corresponding abnormal processing operation is taken.

9. The method for monitoring abnormality of a vehicle display screen according to claim 8, characterized in that: Also includes: The power supply status of the display screen is monitored in real time by the power supply monitoring component. When the power supply of the display screen is abnormal, the deserializer and the display screen power supply are turned off by the power supply monitoring component outputting a low level.

10. A vehicle-mounted display device, characterized in that: The vehicle-mounted display device is configured with the vehicle-mounted display screen abnormality monitoring system as described in any one of claims 1-7.

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