Signal troubleshooting method and device, vehicle-mounted display screen and storage medium

Abstract

The application relates to the technical field of signal troubleshooting, and discloses a signal troubleshooting method and device, a vehicle-mounted display screen and a storage medium, the method comprising the following steps: when performing a radiation immunity experiment in electromagnetic compatibility of the vehicle-mounted display screen, performing real-time detection on picture display of a screen module; when detecting that the picture display is abnormal and detecting that a dialing signal of a switch device exists, sending a working instruction to a TCON chip, so that the TCON chip outputs a fixed picture signal to the screen module for display; and determining whether a link between the TCON chip and the screen module is normal according to the picture displayed by the screen module. When the picture display is abnormal, the switch device is dialed, the working instruction is sent to the TCON chip, the fixed picture signal is output to the screen module for display, and whether the corresponding link is normal is determined, so that the problem that it is time-consuming and labor-consuming to position abnormal display of a screen such as a flower screen and a black screen is solved, cost increase is small, the positioning problem is convenient and fast, and the method has high universality.

Description

Technical Field

[0001] This invention relates to the field of signal troubleshooting technology, and in particular to a signal troubleshooting method, device, vehicle display screen, and storage medium. Background Technology

[0002] When performing EMC (Electromagnetic Compatibility) tests, particularly the RI (Radiated Immunity) test, on automotive displays, screen flickering and blackouts frequently occur, causing the test to fail. This is due to several factors: video signal speeds are very high, reaching several gigabits per second, making it impossible for ordinary oscilloscopes to measure the waveform; high-end oscilloscopes are inconvenient to carry to the lab; and mounting an oscilloscope on the circuit board to monitor waveforms during radiated immunity tests is impractical. During radiated immunity tests, a problem in any segment of the video signal link can cause screen flickering or blackouts. Traditional methods, such as sending software commands to adjust the output of each chip segment and troubleshooting segment by segment, are time-consuming, labor-intensive, and inconvenient. This makes locating the signal lines causing screen flickering or blackouts during radiated immunity tests extremely difficult and time-consuming for engineers. Summary of the Invention

[0003] The main objective of this invention is to provide a signal troubleshooting method, device, vehicle display screen, and storage medium, aiming to solve the technical problems of time-consuming and laborious positioning of abnormal screen displays such as distorted screens and black screens in the prior art.

[0004] To achieve the above objectives, the present invention provides a signal troubleshooting method applied to an in-vehicle display screen. The in-vehicle display screen includes a control circuit board and a screen module. A host computer is sequentially connected to the control circuit board and the screen module. The control circuit board includes a switching device, an MCU, and a TCON chip. One end of the switching device is connected to a high-level signal, and the other end is connected to the MCU or the TCON chip. The method includes the following steps:

[0005] When conducting electromagnetic compatibility (EMC) radiation immunity tests on vehicle-mounted displays, the screen module's display is monitored in real time.

[0006] When an abnormality is detected in the screen display and a toggle signal is detected from the switch device, a working command is sent to the TCON chip so that the TCON chip outputs a fixed screen signal to the screen module for display.

[0007] Determine whether the link between the TCON chip and the screen module is normal based on the screen display.

[0008] Optionally, when an abnormality in the screen display is detected and a toggle signal from the switch device is detected, sending a working command to the TCON chip to cause the TCON chip to output a fixed screen signal to the screen module for display includes:

[0009] When one end of the switch is connected to a high level and the other end is connected to the IO port of the MCU, after detecting the toggle signal of the switch, the MCU sends an IIC instruction to the TCON chip, so that the TCON chip enters the bist mode and outputs a fixed image signal to the screen module for display.

[0010] Optionally, the step of sending a working command to the TCON chip when an abnormality in the screen display is detected and a toggle signal from the switch device is detected, so that the TCON chip outputs a fixed screen signal to the screen module for display, further includes:

[0011] When one end of the switching device is connected to a high level and the other end is connected to the bist pin of the TCON chip, after detecting the toggle signal of the switching device, the TCON chip is controlled to directly enter the bist mode and output a fixed image signal to the screen module for display.

[0012] Optionally, determining whether the link between the TCON chip and the screen module is normal based on the image displayed on the screen module includes:

[0013] When the screen module displays the preset screen, it is determined that the link between the TCON chip and the screen module is normal, and the fault comes from the link before the TCON chip.

[0014] When the screen module displays a screen image that is not the preset image, it is determined that there is a link failure between the TCON chip and the screen module.

[0015] Optionally, after determining that the link between the TCON chip and the screen module is normal and the fault originates from the link before the TCON chip when the screen module displays a preset image, the method further includes:

[0016] When the toggle signal of the switch device is detected, the MCU sends an IIC command to the deserializer, so that the deserializer outputs a fixed image signal to the screen module for display.

[0017] When the toggle signal of the switch device is detected, the fixed image signal is output to the screen module for display through the deserializer;

[0018] Determine whether the link between the deserializer and the TCON chip is normal based on the screen display.

[0019] When the screen module displays a preset screen, it is determined that the link between the deserializer and the TCON chip is normal, and the fault comes from the link before the deserializer.

[0020] When the screen module displays a screen that is not the preset screen, it is determined that there is a link failure between the deserializer and the TCON chip.

[0021] Optionally, the control circuit board further includes a deserializer, the screen module includes an OLED screen module and a Mini LED screen module, the TCON chip includes a first TCON chip and a second TCON chip, the host is sequentially connected to the deserializer, the first TCON chip, and the OLED screen module, the deserializer is sequentially connected to the second TCON chip and the Mini LED screen module, and after real-time detection of the screen module's display during electromagnetic compatibility radiation immunity testing of the vehicle-mounted display, the system further includes:

[0022] If no abnormality is detected in the screen display, determine the screen module displaying the screen.

[0023] When the screen module displayed on the screen is an OLED screen module, the host sends an LVDS signal to the deserializer;

[0024] The LVDS signal is decoded by the deserializer, converted into an EDP signal, and sent to the first TCON chip.

[0025] The first TCON chip processes the EDP signal, converts it into a GOA signal, and sends the GOA signal to the OLED screen module for display.

[0026] Optionally, when no abnormality is detected in the screen display, after determining the screen module displaying the screen, the method further includes:

[0027] When the screen module displayed on the screen is a Mini LED screen module, the host sends an LVDS signal to the deserializer;

[0028] The LVDS signal is decoded by the deserializer to obtain the decoded LVDS signal, which is then sent to the second TCON chip.

[0029] The decoded LVDS signal is converted by the second TCON chip to obtain a Mini LVDS signal, which is then sent to the Mini LED screen module for display.

[0030] Furthermore, to achieve the above objectives, the present invention also proposes a signal screening device, the signal screening device comprising:

[0031] The detection module is used to perform real-time detection of the screen module's display during electromagnetic compatibility radiation immunity tests on vehicle-mounted displays.

[0032] The display module is used to send a working command to the TCON chip when an abnormality is detected in the screen display and a toggle signal from the switch device is detected, so that the TCON chip outputs a fixed screen signal to the screen module for display.

[0033] The judgment module is used to determine whether the link between the TCON chip and the screen module is normal based on the screen display.

[0034] In addition, to achieve the above objectives, the present invention also proposes an in-vehicle display screen, the in-vehicle display screen comprising: a memory, a processor, and a signal troubleshooting program stored in the memory and executable on the processor, the signal troubleshooting program being configured to implement the steps of the signal troubleshooting method described above.

[0035] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a signal troubleshooting program, which, when executed by a processor, implements the steps of the signal troubleshooting method described above.

[0036] This invention performs real-time monitoring of the screen module's display during electromagnetic compatibility (EMC) radiation immunity tests on in-vehicle displays. When an abnormality in the display is detected and a toggle switch signal is detected, a working command is sent to the TCON chip, causing the TCON chip to output a fixed image signal to the screen module for display. The integrity of the link between the TCON chip and the screen module is determined based on the displayed image. This method, by aggravating the abnormal display by toggling the switch, sending a working command to the TCON chip, and outputting a fixed image signal to the screen module, and determining the integrity of the corresponding link based on the displayed image, solves the time-consuming and labor-intensive problem of locating abnormal screen displays such as distorted or black screens. It offers a convenient and quick solution with minimal cost increase and high versatility. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of an in-vehicle display screen in the hardware operating environment involved in the embodiments of the present invention;

[0038] Figure 2 This is a flowchart illustrating the first embodiment of the signal screening method of the present invention;

[0039] Figure 3 This is a flowchart illustrating the second embodiment of the signal screening method of the present invention;

[0040] Figure 4This is a flowchart illustrating the third embodiment of the signal screening method of the present invention;

[0041] Figure 5 This is a schematic diagram of the signal transmission link of the OLED screen module in the third embodiment of the signal troubleshooting method of the present invention;

[0042] Figure 6 This is a schematic diagram of the signal transmission link of the Mini LED screen module in the third embodiment of the signal troubleshooting method of the present invention;

[0043] Figure 7 This is a structural block diagram of the first embodiment of the signal screening device of the present invention.

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0046] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of an in-vehicle display screen in the hardware operating environment involved in the embodiments of the present invention.

[0047] like Figure 1 As shown, the vehicle-mounted display screen may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0048] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the vehicle display screen and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0049] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a signal troubleshooting program.

[0050] exist Figure 1 In the vehicle-mounted display shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the vehicle-mounted display of the present invention can be set in the vehicle-mounted display. The vehicle-mounted display calls the signal troubleshooting program stored in the memory 1005 through the processor 1001 and executes the signal troubleshooting method provided in the embodiment of the present invention.

[0051] This invention provides a signal troubleshooting method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the signal screening method of the present invention.

[0052] In this embodiment, the signal troubleshooting method is applied to an in-vehicle display screen, which includes a control circuit board and a screen module. A host computer is sequentially connected to the control circuit board and the screen module. The control circuit board includes a switching device, an MCU, and a TCON chip. One end of the switching device is connected to a high-level signal, and the other end is connected to the MCU or the TCON chip. The signal troubleshooting method includes the following steps:

[0053] Step S10: When conducting the radiation immunity test in electromagnetic compatibility of the vehicle display screen, the screen module's display is monitored in real time.

[0054] It should be noted that electromagnetic compatibility (EMC) is a comprehensive assessment of the electromagnetic interference (EMI) and immunity (EMS) of electronic products. It is one of the most important indicators of product quality. Electronic devices in automobiles, such as multimedia entertainment, Bluetooth communication, satellite positioning, braking, and airbags, may emit interference signals of different frequency bands to the surrounding environment. Or, if a car enters a strong interference area, the on-board electronic system may malfunction due to its excessive sensitivity, affecting the normal operation of electronic devices and causing driving inconvenience.

[0055] It is understood that the radiation immunity test is a test to assess the degree of resistance of electronic and electrical equipment or systems to these radiations. Conducting a radiation immunity test on a vehicle display screen can detect the degree of resistance of the corresponding vehicle display screen to radiation.

[0056] In practical implementation, when conducting electromagnetic compatibility (EMC) radiation immunity tests on vehicle-mounted displays, the video playback on the displays may become abnormal due to interference signals. Therefore, it is necessary to perform real-time monitoring of the screen module's display.

[0057] Step S20: When an abnormality is detected in the screen display and a toggle signal from the switch device is detected, a working command is sent to the TCON chip so that the TCON chip outputs a fixed screen signal to the screen module for display.

[0058] It should be noted that the anomalies include screen distortion, black screen, etc. Screen distortion refers to the presence of stripes, spots or color blocks on the screen that are different from the normal color, or the position being reversed or disordered, screen shaking or distortion, etc. Black screen is a completely black screen that does not display any picture, as if there is no power. This embodiment does not make specific limitations on these.

[0059] It is worth noting that the switching device can be a DIP switch or a jumper cap. A DIP switch is an address switch used for operation and control, which uses the binary encoding principle of 0 / 1. DIP switches are mostly used in program control boards to control the conduction and disconnection of the performance circuit of control components. A jumper cap is a small square plastic cap on hardware such as motherboards and hard drives. Its interior is metal. Its function is to change the voltage drop generated by the metal connection line between two required points on the circuit board (PCB), thereby changing the performance. This embodiment does not impose specific limitations on this.

[0060] Understandably, the TCON chip is the main control chip of the LCD panel. Its function is to convert the received image data signal into synchronous line control signal and data output signal, so as to realize the display of the image on the LCD panel.

[0061] In practice, when the screen displays a distorted or black screen, a toggle switch is activated to send a working command to the TCON chip. The TCON chip then outputs a fixed image signal to the screen module, which displays a fixed color bar image generated based on the fixed image signal.

[0062] Furthermore, in order to perform anomaly localization, step S20 includes: when one end of the switching device is connected to a high level and the other end is connected to the IO port of the MCU, after detecting the toggle signal of the DIP switch, the MCU sends an IIC instruction to the TCON chip, so that the TCON chip enters the bist mode and outputs a fixed image signal to the screen module for display.

[0063] It should be noted that the MCU is a microcontroller unit, also known as a single-chip microcomputer or microcontroller. It is a chip-level computer that integrates memory, counters, USB, A / D conversion, UART, PLC, DMA and other peripheral interfaces, and even Mini LED driving circuits, by appropriately reducing the frequency and specifications of the central processing unit. This allows for different combinations of control for different applications.

[0064] It is understood that the IIC instruction is an instruction transmitted through the IIC channel, and the IIC instruction is used to control the TCON chip to enter bist mode.

[0065] In practice, the design of different TCON chips will vary. Some chips have an externally connected bit pin, which can be pulled up by an external toggle switch to enter bit mode. Other chips can only enter bit mode through software and output a fixed image signal. In this case, a preset pin needs to be designed on the MCU. By pulling the preset pin on the MCU, the MCU sends an IIC command to the TCON chip to enter bit mode.

[0066] It is understandable that when one end of the switching device is connected to a high level and the other end is connected to the MCU's IO port, that is, the TCON chip does not have a bist pin brought out, and the bist mode can only be entered through software.

[0067] Furthermore, in order to perform anomaly localization, step S20 also includes: when one end of the switching device is connected to a high level and the other end is connected to the bist pin of the TCON chip, after detecting the toggle switch signal, controlling the TCON chip to directly enter the bist mode and output a fixed image signal to the screen module for display.

[0068] It is understandable that when one end of the switching device is connected to a high level and the other end is connected to the bist pin of the TCON chip, the TCON chip has brought out the bist pin, and the bist mode can be directly entered by pulling up the pin through an external toggle switch.

[0069] Step S30: Determine whether the link between the TCON chip and the screen module is normal based on the screen display.

[0070] It is understandable that the presence or absence of a fixed colored bar pattern on the screen module is used to determine whether the link between the TCON chip and the screen module is functioning correctly.

[0071] This embodiment performs real-time monitoring of the screen module's display during electromagnetic compatibility (EMC) radiation immunity tests on an in-vehicle display. When an abnormality in the display is detected and a toggle signal from a switch is detected, a working command is sent to the TCON chip, causing the TCON chip to output a fixed image signal to the screen module for display. The link between the TCON chip and the screen module is then determined based on the displayed image. This invention solves the time-consuming and laborious problem of locating abnormal screen displays such as distorted or black screens by toggling a switch when an abnormality is detected, sending a working command to the TCON chip, and outputting a fixed image signal to the screen module for display, and determining the corresponding link's normality based on the displayed image. It also minimizes cost, provides convenient and quick location solutions, and has high versatility.

[0072] refer to Figure 3 , Figure 3 This is a flowchart illustrating the second embodiment of the signal screening method of the present invention.

[0073] Based on the first embodiment described above, step S30 in the signal investigation method of this embodiment includes:

[0074] Step S301: When the screen module displays a preset screen, it is determined that the link between the TCON chip and the screen module is normal, and the fault comes from the link before the TCON chip.

[0075] It should be noted that the preset screen can be a fixed color bar screen generated based on a fixed screen signal.

[0076] It is understandable that when the screen module displays a fixed color bar image, it indicates that the link between the TCON chip and the screen module is normal, and the fault originates from before the TCON chip. Further investigation is needed to check the signal transmission of the link before the TCON chip.

[0077] Furthermore, to determine the fault location, after step S301, the method further includes: when the toggle signal of the switch device is detected, sending an IIC command to the deserializer via the MCU, so that the deserializer outputs a fixed image signal to the screen module for display; when the toggle signal of the switch device is detected, outputting a fixed image signal to the screen module via the deserializer for display; determining whether the link between the deserializer and the TCON chip is normal based on the image displayed on the screen module; when the image displayed on the screen module is a preset image, determining that the link between the deserializer and the TCON chip is normal, and the fault originates from the link before the deserializer; when the image displayed on the screen module is not a preset image, determining that the link between the deserializer and the TCON chip is faulty.

[0078] It should be noted that when the link between the TCON chip and the screen module is normal, before indicating that the fault comes from the TCON chip, it is necessary to further investigate the link between the deserializer and the TCON chip.

[0079] Understandably, when the deserializer is switched on, it outputs a fixed image signal that is unaffected by the input. If the image display is still abnormal, it indicates a link failure between the deserializer and the TCON chip. The deserializer and TCON chip should be replaced sequentially for cross-verification to determine the specific location of the fault.

[0080] It is worth noting that if the screen module displays a preset image, the screen module display will return to normal after the DIP switch is turned back and the device is restarted.

[0081] Step S302: When the screen module displays a screen image that is not the preset image, determine that there is a link failure between the TCON chip and the screen module.

[0082] It is understandable that when the screen module displays a different color bar image, it indicates a fault in the link between the TCON chip and the screen module. The specific fault location can be determined by cross-verifying the TCON chip and the screen module by replacing them sequentially.

[0083] This embodiment determines that the link between the TCON chip and the screen module is normal when the screen module displays a preset image, indicating that the fault originates from the link preceding the TCON chip. Conversely, it determines that the link between the TCON chip and the screen module is faulty when the screen module displays a different image than the preset image. This method, which determines link transmission abnormalities based on the screen module's display, facilitates quick and easy problem localization, allows for targeted improvements to signal quality, and offers high versatility.

[0084] refer to Figure 4 , Figure 4 This is a flowchart illustrating the third embodiment of the signal screening method of the present invention.

[0085] Based on the first embodiment described above, the control circuit board further includes a deserializer, the screen module includes an OLED screen module and a Mini LED screen module, the TCON chip includes a first TCON chip and a second TCON chip, the host is sequentially connected to the deserializer, the first TCON chip, and the OLED screen module, and the deserializer is sequentially connected to the second TCON chip and the Mini LED screen module. After step S10 in the signal troubleshooting method of this embodiment, the method further includes:

[0086] Step S01: When no abnormality is detected in the screen display, determine the screen module displaying the screen.

[0087] It should be noted that the screen module includes an OLED screen module and a Mini LED screen module, and there are corresponding signal transmission links for the OLED screen module and the Mini LED screen module.

[0088] Step S02: When the screen module displayed on the screen is an OLED screen module, the host sends an LVDS signal to the deserializer.

[0089] It should be noted that the OLED screen module, also known as the OLED display, refers to the Organic Light-Emitting Diode (OLED). Because it is self-emissive, does not require a backlight, has high contrast, is thin, has a wide viewing angle, fast response speed, can be used in flexible panels, has a wide operating temperature range, and has a simpler structure and manufacturing process.

[0090] It is understood that the host refers to the terminal device that sends and receives information, and the host sends the LVDS signal to the deserializer.

[0091] It should be understood that the LVDS signal, or Low-Voltage Differential Signaling, is a differential signaling technology with low power consumption, low bit error rate, low crosstalk, and low radiation. The data transmission rate can reach more than 155Mbps. The core of LVDS technology is to use extremely low voltage swing to transmit data at high speed differentially, which can realize point-to-point or point-to-multipoint connections.

[0092] Step S03: The LVDS signal is decoded by the deserializer, and the LVDS signal is converted into an EDP signal and sent to the first TCON chip.

[0093] It should be noted that the deserializer is an interface circuit in high-speed data communication, playing an important role in optical fiber data transmission and short-distance chip interconnection. It can effectively reduce the number of pins and traces, improve the communication data rate, and increase the utilization rate of existing resources due to the increased data rate.

[0094] Understandably, the deserializer is used to convert serial signals into parallel signals. The deserializer decodes the LVDS signal, converts the LVDS signal into an EDP signal through internal firmware parsing, and sends it to the first TCON chip.

[0095] It should be noted that the EDP signal is a signal transmitted through the EDP interface. The EDP interface is a fully digital interface based on the DisplayPort architecture and protocol. It can transmit high-resolution signals with simpler connectors and fewer pins, and can achieve simultaneous transmission of multiple data, with a transmission rate much higher than that of LVDS signals.

[0096] Step S04: The first TCON chip processes the EDP signal to convert it into a GOA signal, and sends the GOA signal to the OLED screen module for display.

[0097] It should be noted that the lighting mechanism of the OLED screen module is different from that of the Mini LED screen module, and therefore the corresponding TCON chips are different. In this embodiment, the TCON chip includes a first TCON chip and a second TCON chip, and the first TCON chip and the second TCON chip are different.

[0098] Understandably, according to the preset receiving protocol of the first TCON chip, the corresponding preset protocol EDP signal is sent to the first TCON chip. The first TCON chip performs calculations through its own firmware and automatically outputs the corresponding GOA signal to the screen to light up the screen.

[0099] It is worth noting that the GOA signal, or array substrate row drive signal, is a signal that controls the illuminated area and color of the OLED screen.

[0100] like Figure 5 As shown, Figure 5 This is a schematic diagram of the signal transmission link of an OLED screen module. The diagram includes a host, a control circuit board, and an OLED screen module. The control circuit board includes an MCU, a DIP switch, a deserializer, and a first TCON chip. The host, deserializer, first TCON chip, and OLED screen module are connected in sequence.

[0101] Furthermore, after step S01, the method further includes: when the screen module displayed on the screen is a Mini LED screen module, sending an LVDS signal to the deserializer through the host; decoding the LVDS signal through the deserializer to obtain a decoded LVDS signal and sending it to the second TCON chip; converting the decoded LVDS signal through the second TCON chip to obtain a Mini LVDS signal, and sending the Mini LVDS signal to the Mini LED screen module for screen display.

[0102] It should be noted that the second TCON chip, also known as the secondary conversion chip, has a local dimming effect, which allows the Mini LED screen to display only the corresponding display area, improving contrast and resulting in a better display effect than ordinary Mini LED screens without local dimming.

[0103] It is understood that the Mini LED screen module is an LCD screen with Mini LED effect, that is, an LCD screen with local dimming effect.

[0104] It is worth noting that the LVDS signal is converted into a Mini LVDS signal by the second TCON chip, i.e., the secondary conversion chip.

[0105] It is understood that the Mini LVDS signal is a high-speed serial differential signal. LVDS low-voltage differential signals are only suitable for high-speed point-to-point applications, while Mini LVDS signals can be used for multi-point applications. Moreover, compared to LVDS signals, Mini LVDS signals have controllable transition times and provide fail-safe receiver options for bus idle conditions.

[0106] Understandably, the Mini LVDS signal is sent to the Mini LED screen to light it up.

[0107] like Figure 6 As shown, Figure 6 This is a schematic diagram of the signal transmission link of a Mini LED screen module. The diagram includes a host, a control circuit board, and a Mini LED screen module. The control circuit board includes an MCU, a DIP switch, a deserializer, and a second TCON chip. The host, deserializer, second TCON chip, and OLED screen module are connected in sequence.

[0108] This embodiment determines the screen module displaying the image when no display anomaly is detected. If the displaying screen module is an OLED screen module, the host sends an LVDS signal to the deserializer. The deserializer decodes the LVDS signal, converting it into an EDP signal, which is then sent to the first TCON chip. The first TCON chip processes the EDP signal, converting it into a GOA signal, which is then sent to the OLED screen module for image display. In this way, when there is no display anomaly, the host sends an LVDS signal to the deserializer for conversion, resulting in a signal that illuminates the screen for image display.

[0109] Reference Figure 7 , Figure 7This is a structural block diagram of the first embodiment of the signal screening device of the present invention.

[0110] like Figure 7 As shown, the signal screening device proposed in this embodiment of the invention includes:

[0111] The detection module 10 is used to perform real-time detection of the screen module's display during electromagnetic compatibility radiation immunity tests on vehicle-mounted displays.

[0112] Display module 20 is used to send a working command to the TCON chip when an abnormality is detected in the screen display and a toggle signal of the switch device is detected, so that the TCON chip outputs a fixed screen signal to the screen module for display.

[0113] The judgment module 30 is used to determine whether the link between the TCON chip and the screen module is normal based on the screen display.

[0114] This embodiment performs real-time monitoring of the screen module's display during electromagnetic compatibility (EMC) radiation immunity tests on an in-vehicle display. When an abnormality in the display is detected and a toggle signal from a switch is detected, a working command is sent to the TCON chip, causing the TCON chip to output a fixed image signal to the screen module for display. The link between the TCON chip and the screen module is then determined based on the displayed image. This invention solves the time-consuming and laborious problem of locating abnormal screen displays such as distorted or black screens by toggling a switch when an abnormality is detected, sending a working command to the TCON chip, and outputting a fixed image signal to the screen module for display, and determining the corresponding link's normality based on the displayed image. It also minimizes cost, provides convenient and quick location solutions, and has high versatility.

[0115] In one embodiment, the display module 20 is further configured to, when one end of the switching device is connected to a high level and the other end is connected to the IO port of the MCU, send an IIC instruction to the TCON chip through the MCU after detecting the toggle switch signal, so that the TCON chip enters the bist mode and outputs a fixed image signal to the screen module for display.

[0116] In one embodiment, the display module 20 is further configured to, when one end of the switching device is connected to a high level and the other end is connected to the bist pin of the TCON chip, control the TCON chip to directly enter the bist mode after detecting the toggle switch signal, and output a fixed image signal to the screen module for display.

[0117] In one embodiment, the judgment module 30 is further configured to determine that the link between the TCON chip and the screen module is normal and the fault originates from the link before the TCON chip when the screen module displays a preset screen; and to determine that the link between the TCON chip and the screen module is faulty when the screen module displays a different screen.

[0118] In one embodiment, the judgment module 30 is further configured to: when a toggle signal of the switch device is detected, send an IIC instruction to the deserializer via the MCU, so that the deserializer outputs a fixed image signal to the screen module for display; when a toggle signal of the switch device is detected, output a fixed image signal to the screen module via the deserializer for display; determine whether the link between the deserializer and the TCON chip is normal based on the image displayed on the screen module; when the image displayed on the screen module is a preset image, determine that the link between the deserializer and the TCON chip is normal, and the fault originates from the link before the deserializer; when the image displayed on the screen module is not a preset image, determine that the link between the deserializer and the TCON chip is faulty.

[0119] In one embodiment, the detection module 10 is further configured to determine the screen module displaying the screen when no abnormality is detected in the screen display; when the screen module displaying the screen is an OLED screen module, the host sends an LVDS signal to the deserializer; the deserializer decodes the LVDS signal, converts the LVDS signal into an EDP signal and sends it to the first TCON chip; the first TCON chip performs calculations on the EDP signal, converts the EDP signal into a GOA signal, and sends the GOA signal to the OLED screen module for screen display.

[0120] In one embodiment, the detection module 10 is further configured to, when the screen module displaying the image is an LCD screen module, send an LVDS signal to the deserializer via the host; decode the LVDS signal via the deserializer to obtain a decoded LVDS signal and send it to the second TCON chip; convert the decoded LVDS signal via the second TCON chip to obtain a Mini LVDS signal, and send the Mini LVDS signal to the Mini LED screen module for image display.

[0121] In addition, to achieve the above objectives, the present invention also proposes an in-vehicle display screen, the in-vehicle display screen comprising: a memory, a processor, and a signal troubleshooting program stored in the memory and executable on the processor, the signal troubleshooting program being configured to implement the steps of the signal troubleshooting method described above.

[0122] Since this vehicle display screen adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0123] Furthermore, this embodiment of the invention also proposes a storage medium storing a signal troubleshooting program, which, when executed by a processor, implements the steps of the signal troubleshooting method described above.

[0124] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0125] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0126] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0127] In addition, for technical details not described in detail in this embodiment, please refer to the signal troubleshooting method provided in any embodiment of the present invention, which will not be repeated here.

[0128] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0129] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0130] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0131] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A signal screening method, characterized in that, The signal troubleshooting method is applied to an in-vehicle display screen, which includes a control circuit board and a screen module. A host computer is sequentially connected to the control circuit board and the screen module. The control circuit board includes a switching device, an MCU, and a TCON chip. One end of the switching device is connected to a high-level signal, and the other end is connected to the MCU or the TCON chip. The method includes: When conducting electromagnetic compatibility (EMC) radiation immunity tests on vehicle-mounted displays, the screen module's display is monitored in real time. When an abnormality is detected in the screen display and a toggle signal is detected from the switch device, a working command is sent to the TCON chip so that the TCON chip outputs a fixed screen signal to the screen module for display. Determine whether the link between the TCON chip and the screen module is normal based on the screen display.

2. The method as described in claim 1, characterized in that, When an abnormality in the screen display is detected and a toggle signal from the switch is detected, a working command is sent to the TCON chip to cause the TCON chip to output a fixed screen signal to the screen module for display, including: When one end of the switch is connected to a high level and the other end is connected to the IO port of the MCU, after detecting the toggle signal of the switch, the MCU sends an IIC instruction to the TCON chip, so that the TCON chip enters the bist mode and outputs a fixed image signal to the screen module for display.

3. The method as described in claim 1, characterized in that, The step of sending a working command to the TCON chip when an abnormality in the screen display is detected and a toggle signal from the switch device is detected, so that the TCON chip outputs a fixed screen signal to the screen module for display, further includes: When one end of the switching device is connected to a high level and the other end is connected to the bist pin of the TCON chip, after detecting the toggle signal of the switching device, the TCON chip is controlled to directly enter the bist mode and output a fixed image signal to the screen module for display.

4. The method as described in claim 1, characterized in that, The step of determining whether the link between the TCON chip and the screen module is normal based on the image displayed on the screen module includes: When the screen module displays the preset screen, it is determined that the link between the TCON chip and the screen module is normal, and the fault comes from the link before the TCON chip. When the screen module displays a screen image that is not the preset image, it is determined that there is a link failure between the TCON chip and the screen module.

5. The method as described in claim 4, characterized in that, When the screen module displays a preset image, and it is determined that the link between the TCON chip and the screen module is normal and the fault originates from the link before the TCON chip, the following steps are also included: When the toggle signal of the switch device is detected, the MCU sends an IIC command to the deserializer, so that the deserializer outputs a fixed image signal to the screen module for display. When the toggle signal of the switch device is detected, the fixed image signal is output to the screen module for display through the deserializer; Determine whether the link between the deserializer and the TCON chip is normal based on the screen display. When the screen module displays a preset screen, it is determined that the link between the deserializer and the TCON chip is normal, and the fault comes from the link before the deserializer. When the screen module displays a screen that is not the preset screen, it is determined that there is a link failure between the deserializer and the TCON chip.

6. The method as described in claim 1, characterized in that, The control circuit board further includes a deserializer; the screen module includes an OLED screen module and a Mini LED screen module; the TCON chip includes a first TCON chip and a second TCON chip; the host is sequentially connected to the deserializer, the first TCON chip, and the OLED screen module; the deserializer is sequentially connected to the second TCON chip and the Mini LED screen module; and after real-time detection of the screen module's display during electromagnetic compatibility radiation immunity testing of the vehicle-mounted display, the system further includes: If no abnormality is detected in the screen display, determine the screen module displaying the screen. When the screen module displayed on the screen is an OLED screen module, the host sends an LVDS signal to the deserializer; The LVDS signal is decoded by the deserializer, converted into an EDP signal, and sent to the first TCON chip. The first TCON chip processes the EDP signal, converts it into a GOA signal, and sends the GOA signal to the OLED screen module for display.

7. The method as described in claim 6, characterized in that, When no abnormality is detected in the screen display, after determining the screen module displaying the screen, the process further includes: When the screen module displayed on the screen is a Mini LED screen module, the host sends an LVDS signal to the deserializer; The LVDS signal is decoded by the deserializer to obtain the decoded LVDS signal, which is then sent to the second TCON chip. The decoded LVDS signal is converted by the second TCON chip to obtain a Mini LVDS signal, which is then sent to the Mini LED screen module for display.

8. A signal screening device, characterized in that, The signal troubleshooting device performs the signal troubleshooting method according to any one of claims 1 to 7. The vehicle display screen includes: a control circuit board and a screen module. The host is sequentially connected to the control circuit board and the screen module. The control circuit board includes a switching device, an MCU and a TCON chip. One end of the switching device is connected to a high level, and the other end is connected to the MCU or the TCON chip. The signal screening device includes: The detection module is used to perform real-time detection of the screen module's display during electromagnetic compatibility radiation immunity tests on vehicle-mounted displays. The display module is used to send a working command to the TCON chip when an abnormality is detected in the screen display and a toggle signal from the switch device is detected, so that the TCON chip outputs a fixed screen signal to the screen module for display. The judgment module is used to determine whether the link between the TCON chip and the screen module is normal based on the screen display.

9. A vehicle-mounted display screen, characterized in that, The vehicle-mounted display screen includes: a memory, a processor, and a signal troubleshooting program stored in the memory and executable on the processor, the signal troubleshooting program being configured to implement the signal troubleshooting method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a signal troubleshooting program, which, when executed by a processor, implements the signal troubleshooting method as described in any one of claims 1 to 7.

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