Assembly circuit of vehicle display screen

Abstract

The utility model provides an assembly circuit of a vehicle display screen. The assembly circuit comprises a power module, an MCU module, a signal transmission module and a display screen module. The power supply module comprises a DC-DC module and an LDO chip. A power supply is connected with the first end of the DC-DC module and the first end of the LDO chip. The second end of the DC-DC module is connected with the first end of the signal transmission module; the third end of the DC-DC module is connected with the first end of the display screen module; the second end of the LDO chip is connected with the first end of the MCU module; the vehicle-mounted system is connected with the second end of the signal transmission module; the third end of the signal transmission module is connected with the second end of the MCU module; the fourth end of the signal transmission module is connected with the second end of the display screen module; and the third end of the MCU module is connected with the third end of the display screen module. The safety and stability of the vehicle display screen assembly are improved, and then the display effect of a vehicle display screen is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle display screens, in particular to an assembly circuit of a vehicle display screen. Background Art

[0002] With the development of technology, the display screen of a vehicle is usually separated into a separate assembly component, and the functional safety goals of the entire vehicle have higher technical requirements for the separated screen assembly.

[0003] At present, traditional vehicle display screens only focus on the video display of the interface. Since the instrument system is composed of multiple devices, each device or component will affect the effect and safety and stability of the display screen, reducing the safety and stability of the vehicle display screen assembly, which in turn leads to poor display effects of the vehicle display screen. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide an assembly circuit of a vehicle display screen. By arranging a DC-DC module and an LDO chip in a power module, the LDO chip is responsible for controlling the MCU module, and the DC-DC module supplies power to the assembly. The MCU module controls the transmission and display functions of the video signal while controlling the safety function of the vehicle display screen assembly, thereby improving the safety and stability of the vehicle display screen assembly and enhancing the display effect of the vehicle display screen.

[0005] The embodiment of the present application provides an assembly circuit of a vehicle display screen, the assembly circuit comprising: a power module, an MCU module, a signal transmission module and a display screen module; wherein the power module comprises a DC-DC module and an LDO chip:

[0006] The power supply of the vehicle is respectively connected to the first end of the DC-DC module and the first end of the LDO chip; the second end of the DC-DC module is connected to the first end of the signal transmission module; the third end of the DC-DC module is connected to the first end of the display screen module; the second end of the LDO chip is connected to the first end of the MCU module; the vehicle-mounted system is connected to the second end of the signal transmission module; the third end of the signal transmission module is connected to the second end of the MCU module; the fourth end of the signal transmission module is connected to the second end of the display screen module; the third end of the MCU module is connected to the third end of the display screen module;

[0007] The DC-DC module and the LDO chip respectively receive the voltage input by the vehicle's power supply; the DC-DC module supplies the input voltage to the signal transmission module and the display screen module respectively, and monitors the voltage input status of the power supply; the LDO chip supplies the input voltage to the MCU module, and monitors the voltage input status of the power supply and the activity status of the MCU module; the signal transmission module receives the video signal sent by the vehicle-mounted system, and transmits the video signal to the display screen module; the MCU module is used to control the transmission of the video signal by the signal transmission module and the function of the display screen module, and control the partition authority and data transmission and storage security.

[0008] Furthermore, the signal transmission module includes a deserializer:

[0009] The deserializer is arranged in the signal transmission module; the first end of the deserializer is connected to the second end of the DC-DC module; the second end of the deserializer is connected to the vehicle-mounted system of the vehicle; the third end of the deserializer is connected to the second end of the MCU module; the fourth end of the deserializer is connected to the second end of the display module;

[0010] The deserializer is used to detect whether the video signal transmitted by the vehicle's onboard system can be normally transmitted to the display screen module.

[0011] Furthermore, the MCU module includes an MPU module and an ECC module:

[0012] The MPU module and the ECC module are arranged in the MCU module; the first end of the MPU module and the first end of the ECC module are respectively connected to the third end of the signal transmission module; the second end of the MPU module and the second end of the ECC module are respectively connected to the third end of the display screen module;

[0013] The MPU module divides the memory modules into the same protection zone to limit the permissions; the ECC module controls the security functions of data transmission and storage; and the display screen module is used to control the display of video signals and the display screen functions.

[0014] Furthermore, the MCU module also includes a register checker and a watchdog module:

[0015] The register checker and the watchdog module are arranged in the MCU module; the first end of the register checker and the first end of the watchdog module are respectively connected to the third end of the signal transmission module; the second end of the register checker and the second end of the watchdog module are respectively connected to the third end of the display screen module;

[0016] The register checker is used to read back the register after writing it, so as to monitor the matching between the register read data and the written data; the watchdog module is used to monitor the zombie state of the MCU module through counting operation, so as to restart the MCU module when the MCU module is in the zombie state.

[0017] Furthermore, the MCU module also includes a storage module:

[0018] The storage module is arranged in the MCU module; the first end of the storage module is connected to the third end of the signal transmission module; the second end of the storage module is connected to the third end of the display screen module;

[0019] The storage module is a serial peripheral device interface memory, which is used to control the data storage of the MCU module in a serial manner.

[0020] Furthermore, the display screen module includes a TFT interface module, a PCB panel, an FPC connector and a TDDI display module:

[0021] The third end of the MCU module and the fourth end of the signal transmission module are respectively connected to the first end of the TFT interface module; the second end of the TFT interface module is connected to the first end of the PCB panel; the second end of the PCB panel is connected to the first end of the FPC connector; the second end of the FPC connector is connected to the first end of the TDDI display module;

[0022] The TFT interface module is used to control and manage the pixels on the display screen to display images according to the control instructions of the MCU module; the PCB panel is used to control the image display of the TDDI display module and control the input video signal; the FPC connector is used to connect the PCB panel and the TDDI display module; the TDDI display module is used to display video signals and touch control functions.

[0023] Furthermore, the TFT interface module includes a VDD interface, an I2C interface and an EDP interface:

[0024] The first end of the VDD interface and the first end of the I2C interface are respectively connected to the third end of the MCU module; the second end of the VDD interface and the second end of the I2C interface are respectively connected to the first end of the PCB panel; the first end of the EDP interface is connected to the fourth end of the signal transmission module; the second end of the EDP interface is connected to the first end of the PCB panel;

[0025] The VDD interface is used to control the connection between the power supply and the control of the MCU; the I2C interface is used to control the communication of the touch function; and the EDP interface is used to transmit the video signal.

[0026] Furthermore, the PCB panel includes a PCB memory, a PMIC module and a Bridge chip:

[0027] The first end of the PCB memory and the first end of the PMIC module are respectively connected to the second end of the VDD interface; the second end of the PCB memory and the second end of the PMIC module are respectively connected to the first end of the FPC connector; the first end of the Bridge chip is connected to the second end of the EDP interface; the second end of the Bridge chip is connected to the first end of the FPC connector;

[0028] The PCB memory is used to store data of the SPI touch signal; the PMIC module is used to manage the power supply of the display screen module; the Bridge chip is used to display the alarm signal and perform CRC check on the displayed alarm signal.

[0029] Furthermore, the TDDI display module includes a thermistor, an LED panel, a liquid crystal drive device, a touch panel and a visual control:

[0030] The thermistor, the LED panel, the liquid crystal drive device, the touch panel and the visual control are respectively arranged in the TDDI display module; the first end of the thermistor, the first end of the LED panel, the first end of the liquid crystal drive device, the first end of the touch panel and the first end of the visual control are respectively connected to the second end of the FPC connector.

[0031] An embodiment of the present application provides an assembly circuit of a vehicle display screen, the assembly circuit comprising: a power module, an MCU module, a signal transmission module and a display screen module; wherein the power module comprises a DC-DC module and an LDO chip: the vehicle's power supply is respectively connected to the first end of the DC-DC module and the first end of the LDO chip; the second end of the DC-DC module is connected to the first end of the signal transmission module; the third end of the DC-DC module is connected to the first end of the display screen module; the second end of the LDO chip is connected to the first end of the MCU module; the vehicle's on-board system is connected to the second end of the signal transmission module; the third end of the signal transmission module is connected to the second end of the MCU module; the fourth end of the signal transmission module is connected to the display screen module; The second end of the group is connected; the third end of the MCU module is connected to the third end of the display screen module; the DC-DC module and the LDO chip respectively receive the voltage input by the power supply of the vehicle; the DC-DC module supplies the input voltage to the signal transmission module and the display screen module respectively, and monitors the voltage input state of the power supply; the LDO chip supplies the input voltage to the MCU module, and monitors the voltage input state of the power supply and the activity state of the MCU module; the signal transmission module receives the video signal sent by the vehicle system, and transmits the video signal to the display screen module; the MCU module is used to control the transmission of the video signal by the signal transmission module and the function of the display screen module, and control the partition authority and data transmission and storage security.

[0032] Compared with the traditional vehicle display screen assembly circuit in the prior art that only focuses on the video display of the interface, by setting a DC-DC module and an LDO chip in the power module, the LDO chip is responsible for controlling the MCU module, and the DC-DC module supplies power to the assembly. While controlling the transmission and display functions of the video signal, the MCU module controls the safety function of the vehicle display screen assembly, thereby improving the safety and stability of the vehicle display screen assembly and enhancing the display effect of the vehicle display screen.

[0033] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the structure of an assembly circuit of a vehicle display screen provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the structure of a signal transmission module provided in an embodiment of the present application;

[0037] Figure 3 A schematic diagram of the structure of an MCU module provided in an embodiment of the present application;

[0038] Figure 4 This is one of the structural schematic diagrams of a display screen module provided in an embodiment of the present application;

[0039] Figure 5 This is a second structural schematic diagram of a display screen module provided in an embodiment of the present application.

[0040] Icons: 100: vehicle display assembly circuit; 200: power supply; 300: vehicle system; 110: power module; 120: signal transmission module; 130: MCU module; 140: display module; 111: DC-DC module; 112: LDO chip; 121: deserializer; 131: MPU module; 132: ECC module; 133: register checker; 134: watchdog module; 135: storage module; 141: TFT interface module; 142: PCB panel; 143: FPC connector; 144: TDDI display module; 1411: VDD interface; 1412: I 2 C interface; 1413: EDP interface; 1421: PCB memory; 1422: PMIC module; 1423: Bridge chip; 1441: thermistor; 1442: LED panel; 1443: LCD driver; 1444: touch panel; 1445: visual control. DETAILED DESCRIPTION

[0041] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0042] Research has found that at present, traditional vehicle display screens only focus on the video display of the interface. Since the instrument system is composed of multiple devices, each device or component will affect the effect and safety and stability of the display screen, reducing the safety and stability of the vehicle display screen assembly, which in turn leads to poor display effects of the vehicle display screen.

[0043] Based on this, an embodiment of the present application provides an assembly circuit of a vehicle display screen. A DC-DC module and an LDO chip are set in a power module. The LDO chip is responsible for controlling the MCU module, and the DC-DC module supplies power to the assembly. The MCU module controls the transmission and display functions of the video signal while controlling the safety functions of the vehicle display screen assembly, thereby improving the safety and stability of the vehicle display screen assembly and enhancing the display effect of the vehicle display screen.

[0044] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of an assembly circuit of a vehicle display screen provided in an embodiment of the present application. Figure 1 As shown in the figure, a schematic diagram of the structure of the assembly circuit of the vehicle display screen provided in an embodiment of the present application, the assembly circuit includes 100: a power module 110, an MCU module 130, a signal transmission module 120 and a display screen module 140; wherein the power module 110 includes a DC-DC module 111 and an LDO chip 112: the vehicle power supply 200 is respectively connected to the first end of the DC-DC module 111 and the first end of the LDO chip 112; the second end of the DC-DC module 111 is connected to the first end of the signal transmission module 120 ; The third end of the DC-DC module 111 is connected to the first end of the display screen module 140; the second end of the LDO chip 112 is connected to the first end of the MCU module 130; the vehicle's onboard system 300 is connected to the second end of the signal transmission module 120; the third end of the signal transmission module 120 is connected to the second end of the MCU module 130; the fourth end of the signal transmission module 120 is connected to the second end of the display screen module 140; the third end of the MCU module 130 is connected to the third end of the display screen module 140.

[0045] Furthermore, the DC-DC module 111 and the LDO chip 112 respectively receive the voltage input by the vehicle's power supply 200; the DC-DC module 111 supplies the input voltage to the signal transmission module 120 and the display screen module 140 respectively, and monitors the voltage input status of the power supply 200; the LDO chip 112 supplies the input voltage to the MCU module 130, and monitors the voltage input status of the power supply 200 and the activity status of the MCU module 130; the signal transmission module 120 receives the video signal sent by the vehicle system 300, and transmits the video signal to the display screen module 140; the MCU module 130 is used to control the transmission of the video signal by the signal transmission module 120 and the function of the display screen module 140, and control the partition authority and data transmission and storage security.

[0046] Among them, for the power supply of the power supply 200, the system input voltage is 9V~16V (Bat), and the power module 110 uses a large-range DC-DC module 111; in addition, the rated power supply input range of the power supply 200 is 3V~36V, which is larger than the level power supply range.

[0047] Furthermore, the DC-DC module 111 is configured with a hardware voltage monitoring module, and when it is monitored that the input voltage is over-voltage or under-voltage, the PGood pin set in the DC-DC module 111 is forced to be pulled low.

[0048] Furthermore, the LDO chip 112 is an independent power supply chip to ensure stability and reduce interference, and the input voltage is Bat; in addition, the LDO chip 112 is configured with a voltage monitoring module with a PG pin. When the input voltage is overvoltage or undervoltage, the PG pin will be set low; the PG pin is connected to the reset pin of the MCU module 130 and will also be forced to be pulled low, thereby putting the MCU module 130 in a reset state.

[0049] Furthermore, the LDO chip 112 is configured with a watchdog module to monitor the activity status of the MCU module 130 ; specifically, when the MCU module 130 stops feeding the watchdog, the watchdog module uses the Rest pin to reset the MCU module 130 .

[0050] For further information, see Figure 2 , Figure 2 This is a schematic diagram of the structure of a signal transmission module provided in an embodiment of the present application. Figure 2As shown in , the signal transmission module 120 includes a deserializer 121: the deserializer 121 is arranged in the signal transmission module 120; the first end of the deserializer 121 is connected to the second end of the DC-DC module 111; the second end of the deserializer 121 is connected to the vehicle's onboard system 300; the third end of the deserializer 121 is connected to the second end of the MCU module 130; the fourth end of the deserializer 121 is connected to the second end of the display module 140.

[0051] Specifically, the deserializer 121 is used to detect whether the video signal transmitted by the vehicle-mounted system 300 of the vehicle can be normally transmitted to the display screen module 140 .

[0052] Exemplarily, the deserializer 121 can detect LOCK, register, INT, and power supply, that is, the deserializer 121 monitors whether the high level of the LOCK register is stable to determine the signal condition; the deserializer 121 monitors the RegSTREAMSTS register, and the deserializer 121 provides a query function for the FPD-Link data retention status and abnormalities; the deserializer 121 monitors the RegEFUSESts register to monitor the power supply status of the deserializer 121.

[0053] For further information, see Figure 3 , Figure 3 This is a schematic diagram of the structure of an MCU module provided in an embodiment of the present application. Figure 3 As shown in the figure, the MCU module 130 includes an MPU module 131 and an ECC module 132: the MPU module 131 and the ECC module 132 are arranged in the MCU module 130; the first end of the MPU module 131 and the first end of the ECC module 132 are respectively connected to the third end of the signal transmission module 120; the second end of the MPU module 131 and the second end of the ECC module 132 are respectively connected to the third end of the display screen module 140.

[0054] The MPU module 131 divides the memory modules into the same protection zone to limit the permissions; the ECC module 132 controls the security functions of data transmission and storage.

[0055] Specifically, the MPU module 131 is used to partition the RAM and set permissions, and divide software modules of the same level into the same protection zone to avoid interference (code injection attack) caused by low-security level modules accessing high-security level modules; illustratively, the MPU module 131 sets access permissions for different memory areas and peripheral addresses for threads TASK, interrupts ISR, etc., thereby realizing the partitioning of software modules.

[0056] Furthermore, the ECC module 132 is used to ensure the functional safety of data transmission and storage; illustratively, when ensuring the security of storage, the ECC module 132 calculates 1 parity bit for every 7 bits of data, and the parity bits are collectively stored in the OOB area of ​​the Flash. When the read data is found to be inconsistent with the parity bits, the reading is determined to be abnormal.

[0057] Further, such as Figure 3 As shown in, the MCU module 130 also includes a register checker 133 and a watchdog module 134: the register checker 133 and the watchdog module 134 are arranged in the MCU module 130; the first end of the register checker 133 and the first end of the watchdog module 134 are respectively connected to the third end of the signal transmission module 120; the second end of the register checker 133 and the second end of the watchdog module 134 are respectively connected to the third end of the display screen module 140.

[0058] Among them, the register checker 133 is used to read back the register after writing it to monitor the matching between the register read data and the written data; the watchdog module 134 is used to monitor the zombie state of the MCU module through counting operations to restart the MCU module 130 when the MCU module is in the zombie state.

[0059] Furthermore, the MCU module 130 is configured with a self-test module for performing power-on self-test on each internal controller. For example, a comparator is used to verify whether the voltage of each part is normal and the corresponding status is fed back by writing it into an internal register. In addition, the MCU module 130 is configured with an operating system for controlling functional safety, which can monitor the internal processes and states of the system to meet the functional safety needs for operating system process monitoring.

[0060] Further, such as Figure 3 As shown in, the MCU module 130 also includes a storage module 135: the storage module 135 is arranged in the MCU module 130; the first end of the storage module 135 is connected to the third end of the signal transmission module 120; the second end of the storage module 135 is connected to the third end of the display screen module 140.

[0061] The storage module 135 is a serial peripheral device interface memory, which is used to control the data storage of the MCU module 130 in a serial manner.

[0062] For further information, see Figure 4 , Figure 4 This is one of the structural schematic diagrams of a display screen module provided in an embodiment of the present application. Figure 4As shown in the figure, the display screen module 140 includes a TFT interface module 141, a PCB panel 142, an FPC connector 143 and a TDDI display module 144: the third end of the MCU module 130 and the fourth end of the signal transmission module 120 are respectively connected to the first end of the TFT interface module 141; the second end of the TFT interface module 141 is connected to the first end of the PCB panel 142; the second end of the PCB panel 142 is connected to the first end of the FPC connector 143; the second end of the FPC connector 143 is connected to the first end of the TDDI display module 144.

[0063] Specifically, the TFT interface module 141 is used to control and manage pixels on the display screen to display images according to the control instructions of the MCU module 130; the PCB panel 142 is used to control the image display of the TDDI display module 144 and control the input video signal; the FPC connector 143 is used to connect the PCB panel 142 and the TDDI display module 144; the TDDI display module 144 is used to display video signals and touch control functions.

[0064] For further information, see Figure 5 , Figure 5 This is a second structural diagram of a display screen module provided in an embodiment of the present application. Figure 5 As shown in FIG. 1 , the TFT interface module 141 includes a VDD interface 1411, an I 2 C interface 1412 and EDP interface 1413: The first end of the VDD interface 1411 and the I 2 The first end of the C interface 1412 is connected to the third end of the MCU module 130; the second end of the VDD interface 1411 is connected to the I 2 The second end of the C interface 1412 is respectively connected to the first end of the PCB panel 142; the first end of the EDP interface 1413 is connected to the fourth end of the signal transmission module 120; the second end of the EDP interface 1413 is connected to the first end of the PCB panel 142.

[0065] Specifically, the VDD interface 1411 is used to control the connection between the power supply and the control of the MCU; 2 The C interface 1412 is used to control the communication of the touch function; and the EDP interface 1413 is used to transmit video signals.

[0066] Among them, the I 2 The I C interface implements 2C communication uses E2E mechanisms to ensure functional safety, for example, including RollingCounter / CRC / TimeOut Detect / Alive Counter mechanism settings.

[0067] Further, such as Figure 5 As shown in the figure, the PCB panel 142 includes a PCB memory 1421, a PMIC module 1422 and a Bridge chip 1423: the first end of the PCB memory 1421 and the first end of the PMIC module 1422 are respectively connected to the second end of the VDD interface 1411; the second end of the PCB memory 1421 and the second end of the PMIC module 1422 are respectively connected to the first end of the FPC connector 143; the first end of the Bridge chip 1423 is connected to the second end of the EDP interface 1413; the second end of the Bridge chip 1423 is connected to the first end of the FPC connector 143.

[0068] Specifically, the PCB memory 1421 is used to store data of the SPI touch signal; the PMIC module 1422 is used to manage the power supply of the display module 140; and the Bridge chip 1423 is used to display the alarm signal and perform CRC check on the displayed alarm signal.

[0069] Further, such as Figure 5 As shown in , the TDDI display module 144 includes a thermistor 1441, an LED panel 1442, a liquid crystal drive device 1443, a touch panel 1444 and a visual control 1445: the thermistor 1441, the LED panel 1442, the liquid crystal drive device 1443, the touch panel 1444 and the visual control 1445 are respectively arranged in the TDDI display module 144; the first end of the thermistor 1441, the first end of the LED panel 1442, the first end of the liquid crystal drive device 1443, the first end of the touch panel 1444 and the first end of the visual control 1445 are respectively connected to the second end of the FPC connector 143.

[0070] An embodiment of the present application provides an assembly circuit of a vehicle display screen, the assembly circuit comprising: a power module, an MCU module, a signal transmission module and a display screen module; wherein the power module comprises a DC-DC module and an LDO chip: the vehicle's power supply is respectively connected to the first end of the DC-DC module and the first end of the LDO chip; the second end of the DC-DC module is connected to the first end of the signal transmission module; the third end of the DC-DC module is connected to the first end of the display screen module; the second end of the LDO chip is connected to the first end of the MCU module; the vehicle's on-board system is connected to the second end of the signal transmission module; the third end of the signal transmission module is connected to the second end of the MCU module; the fourth end of the signal transmission module is connected to the display screen module; The second end of the group is connected; the third end of the MCU module is connected to the third end of the display screen module; the DC-DC module and the LDO chip respectively receive the voltage input by the power supply of the vehicle; the DC-DC module supplies the input voltage to the signal transmission module and the display screen module respectively, and monitors the voltage input state of the power supply; the LDO chip supplies the input voltage to the MCU module, and monitors the voltage input state of the power supply and the activity state of the MCU module; the signal transmission module receives the video signal sent by the vehicle system, and transmits the video signal to the display screen module; the MCU module is used to control the transmission of the video signal by the signal transmission module and the function of the display screen module, and control the partition authority and data transmission and storage security.

[0071] In this way, compared with the traditional vehicle display screen in the prior art which only focuses on the assembly circuit of the video display of the interface, by setting a DC-DC module and an LDO chip in the power module, the LDO chip is responsible for controlling the MCU module, and the DC-DC module supplies power to the assembly. While controlling the transmission and display functions of the video signal, the MCU module controls the safety function of the vehicle display screen assembly, thereby improving the safety and stability of the vehicle display screen assembly and enhancing the display effect of the vehicle display screen.

[0072] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the circuits, systems and units described above can refer to the corresponding processes in the aforementioned embodiments and will not be repeated here.

[0073] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An assembly circuit of a vehicle display screen, characterized in that: The assembly circuit includes: a power module, an MCU module, a signal transmission module and a display screen module; wherein the power module includes a DC-DC module and an LDO chip: The power supply of the vehicle is respectively connected to the first end of the DC-DC module and the first end of the LDO chip; the second end of the DC-DC module is connected to the first end of the signal transmission module; the third end of the DC-DC module is connected to the first end of the display screen module; the second end of the LDO chip is connected to the first end of the MCU module; the vehicle-mounted system is connected to the second end of the signal transmission module; the third end of the signal transmission module is connected to the second end of the MCU module; the fourth end of the signal transmission module is connected to the second end of the display screen module; the third end of the MCU module is connected to the third end of the display screen module; The DC-DC module and the LDO chip respectively receive the voltage input by the vehicle's power supply; the DC-DC module supplies the input voltage to the signal transmission module and the display screen module respectively, and monitors the voltage input status of the power supply; the LDO chip supplies the input voltage to the MCU module, and monitors the voltage input status of the power supply and the activity status of the MCU module; the signal transmission module receives the video signal sent by the vehicle-mounted system, and transmits the video signal to the display screen module; the MCU module is used to control the transmission of the video signal by the signal transmission module and the function of the display screen module, and control the partition authority and data transmission and storage security.

2. The assembly circuit according to claim 1, characterized in that: The signal transmission module includes a deserializer: The deserializer is arranged in the signal transmission module; the first end of the deserializer is connected to the second end of the DC-DC module; the second end of the deserializer is connected to the vehicle-mounted system of the vehicle; the third end of the deserializer is connected to the second end of the MCU module; the fourth end of the deserializer is connected to the second end of the display module; The deserializer is used to detect whether the video signal transmitted by the vehicle's onboard system can be normally transmitted to the display screen module.

3. The circuit assembly according to claim 1, characterized in that: The MCU module includes an MPU module and an ECC module: The MPU module and the ECC module are arranged in the MCU module; the first end of the MPU module and the first end of the ECC module are respectively connected to the third end of the signal transmission module; the second end of the MPU module and the second end of the ECC module are respectively connected to the third end of the display screen module; The MPU module divides the memory modules into the same protection zone to limit permissions; The ECC module controls the security functions of data transmission and storage.

4. The circuit assembly according to claim 3, characterized in that: The MCU module also includes a register checker and a watchdog module: The register checker and the watchdog module are arranged in the MCU module; the first end of the register checker and the first end of the watchdog module are respectively connected to the third end of the signal transmission module; the second end of the register checker and the second end of the watchdog module are respectively connected to the third end of the display screen module; The register checker is used to read back the register after writing it, so as to monitor the matching between the register read data and the written data; the watchdog module is used to monitor the zombie state of the MCU module through counting operation, so as to restart the MCU module when the MCU module is in the zombie state.

5. The circuit assembly according to claim 4, characterized in that: The MCU module also includes a storage module: The storage module is arranged in the MCU module; the first end of the storage module is connected to the third end of the signal transmission module; the second end of the storage module is connected to the third end of the display screen module; The storage module is a serial peripheral device interface memory, which is used to control the data storage of the MCU module in a serial manner.

6. The circuit assembly according to claim 1, characterized in that: The display screen module includes a TFT interface module, a PCB panel, an FPC connector and a TDDI display module: The third end of the MCU module and the fourth end of the signal transmission module are respectively connected to the first end of the TFT interface module; the second end of the TFT interface module is connected to the first end of the PCB panel; the second end of the PCB panel is connected to the first end of the FPC connector; the second end of the FPC connector is connected to the first end of the TDDI display module; The TFT interface module is used to control and manage the pixels on the display screen to display images according to the control instructions of the MCU module; the PCB panel is used to control the image display of the TDDI display module and control the input video signal; The FPC connector is used to connect the PCB panel and the TDDI display module; The TDDI display module is used to display video signals and touch control functions.

7. The circuit assembly according to claim 6, characterized in that: The TFT interface module includes a VDD interface, an I 2 C-mount and EDP-mount: The first end of the VDD interface and the I 2 The first end of the C interface is connected to the third end of the MCU module; the second end of the VDD interface is connected to the I 2 The second end of the C interface is respectively connected to the first end of the PCB panel; the first end of the EDP interface is connected to the fourth end of the signal transmission module; the second end of the EDP interface is connected to the first end of the PCB panel; The VDD interface is used to control the connection between the power supply and the control of the MCU; 2 The C interface is used to control the communication of the touch function; the EDP interface is used to transmit the video signal.

8. The circuit assembly according to claim 7, characterized in that: The PCB panel includes a PCB memory, a PMIC module and a Bridge chip: The first end of the PCB memory and the first end of the PMIC module are respectively connected to the second end of the VDD interface; the second end of the PCB memory and the second end of the PMIC module are respectively connected to the first end of the FPC connector; the first end of the Bridge chip is connected to the second end of the EDP interface; the second end of the Bridge chip is connected to the first end of the FPC connector; The PCB memory is used to store data of the SPI touch signal; the PMIC module is used to manage the power supply of the display screen module; the Bridge chip is used to display the alarm signal and perform CRC check on the displayed alarm signal.

9. The circuit assembly according to claim 8, characterized in that: The TDDI display module includes a thermistor, an LED panel, a liquid crystal drive device, a touch panel and visual controls: The thermistor, the LED panel, the liquid crystal drive device, the touch panel and the visual control are respectively arranged in the TDDI display module; the first end of the thermistor, the first end of the LED panel, the first end of the liquid crystal drive device, the first end of the touch panel and the first end of the visual control are respectively connected to the second end of the FPC connector.

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