CN116224172A

CN116224172A - Signal checking method and device, vehicle-mounted display screen and storage medium

Info

Publication number: CN116224172A
Application number: CN202310139892.2A
Authority: CN
Inventors: 李林峰; 汪杨刚; 曾俊雄
Original assignee: Wuhan Haiwei Technology Co ltd
Current assignee: Wuhan Haiwei Technology Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-06-06

Abstract

The invention relates to the technical field of signal investigation, and discloses a signal investigation method, a device, a vehicle-mounted display screen and a storage medium, wherein the method comprises the following steps: when the vehicle-mounted display screen performs a radiation immunity experiment in electromagnetic compatibility, detecting the picture display of the screen module in real time; when abnormal display of the picture is detected and a toggle signal of the switching device is detected, a working instruction is sent to the TCON chip, so that the TCON chip outputs a fixed picture signal to the screen module for display; and determining whether the link between the TCON chip and the screen module is normal or not according to the picture displayed by the screen module. According to the invention, when the display of the picture is abnormal, the switch device is shifted, 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 or not is determined, so that the problems of time and labor waste in different display positioning of the screen such as the screen with patterns, the screen with patterns and the like are solved, the cost is increased little, the positioning is convenient and quick, and the universality is high.

Description

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

Technical Field

The present invention relates to the field of signal checking technologies, and in particular, to a signal checking method and apparatus, a vehicle-mounted display screen, and a storage medium.

Background

When the vehicle-mounted display screen performs an RI (radiation immunity) experiment in emc (electromagnetic compatibility), the phenomena of screen-splash and screen-blackness often occur, so that the experiment fail is caused. Because the video signal speed is fast, and is up to more than a few G, the waveform can not be measured by a common oscilloscope, the high-end oscilloscope is inconvenient to carry to a laboratory, and when the radiation immunity experiment is carried out, the waveform monitoring condition of the oscilloscope is not realistic when the oscilloscope is mounted on a circuit board. When radiation immunity experiments are carried out, any section on a video signal link is problematic, so that a screen is patterned and black, the output of each section of chip is regulated according to the previous instruction sent by software, and the radiation immunity experiments are carried out section by section, so that time and labor are consumed, and the radiation immunity experiments are inconvenient. When an engineer performs a radiation immunity experiment, the position of a signal line which leads to a screen pattern and a screen black is labor-consuming.

Disclosure of Invention

The invention mainly aims to provide a signal checking method, a signal checking device, a vehicle-mounted display screen and a storage medium, and aims to solve the technical problems of time and labor waste in different display positioning of screens such as a screen pattern, a screen black and the like in the prior art.

In order to achieve the above object, the present invention provides a signal checking method, which is applied to a vehicle-mounted display screen, the vehicle-mounted display screen includes: the control circuit board and the screen module, the host computer with control circuit board reaches the screen module links to each other in proper order, control circuit board includes switching device, MCU and TCON chip, switching device one end is connected high level, and the other end is connected MCU or the TCON chip, the method includes following steps:

when a vehicle-mounted display screen performs a radiation immunity experiment in electromagnetic compatibility, detecting the picture display of the screen module in real time;

when abnormal display of a picture is detected and a toggle signal of a switching device is detected, a working instruction is sent to the 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 or not according to the picture displayed by the screen module.

Optionally, when abnormality of display of a screen is detected and a toggle signal of a switching device is detected, a working instruction is sent to the TCON chip, so that the TCON chip outputs a fixed screen signal to the screen module for display, including:

when one end of the switching device is connected with a high level and the other end of the switching device is connected with the IO port of the MCU, after a toggle signal of the switching device is detected, an IIC instruction is sent to the TCON chip through the MCU, so that the TCON chip enters a fast mode and outputs a fixed picture signal to a screen module for display.

Optionally, when abnormality of display of a screen is detected and a toggle signal of a switching device is detected, a working instruction is sent to the TCON chip, so that the TCON chip outputs a fixed screen signal to the screen module for display, and the method further includes:

when one end of the switching device is connected with a high level and the other end of the switching device is connected with a fast pin of the TCON chip, after a toggle signal of the switching device is detected, the TCON chip is controlled to directly enter a fast mode, and a fixed picture signal is output to a screen module for display.

Optionally, the determining whether the link between the TCON chip and the screen module is normal according to the frame displayed by the screen module includes:

when the picture displayed by the screen module is a preset picture, judging that the link between the TCON chip and the screen module is normal, wherein the fault comes from the link before the TCON chip;

and when the picture displayed by the screen module is not a preset picture, judging that the link between the TCON chip and the screen module is faulty.

Optionally, when the frame displayed by the screen module is a preset frame, determining that a link between the TCON chip and the screen module is normal, and after the failure comes from a link before the TCON chip, further includes:

when a toggle signal of the switching device is detected, an IIC instruction is sent to a deserializer through the MCU, so that the deserializer outputs a fixed picture signal to a screen module for display;

when the toggle signal of the switching device is detected, outputting a fixed picture signal to a screen module for display through the deserializer;

judging whether a link between the deserializer and the TCON chip is normal or not according to a picture displayed by the screen module;

when the picture displayed by the screen module is a preset picture, judging that the link between the deserializer and the TCON chip is normal, and the fault comes from the link before the deserializer;

and when the picture displayed by the screen module is not a preset picture, judging that the link between the deserializer and the TCON chip is faulty.

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 computer with the deserializer, the first TCON chip, the OLED screen module links to each other in proper order, the deserializer with the second TCON chip and the Mini LED screen module links to each other in proper order, when the radiation immunity experiment in electromagnetic compatibility is done to the on-vehicle display screen, after carrying out real-time detection to the picture display of screen module, still include:

judging a screen module for displaying the picture when abnormality of the picture display is not detected;

when the screen module for displaying the picture is an OLED screen module, the host sends LVDS signals to the deserializer;

decoding the LVDS signal through the deserializer, converting the LVDS signal into an EDP signal and transmitting the EDP signal to the first TCON chip;

and carrying out operation processing on the EDP signals through the first TCON chip, converting the EDP signals into GOA signals, and sending the GOA signals to the OLED screen module for picture display.

Optionally, after the judging of the screen module of the picture display when the abnormality of the picture display is not detected, the method further includes:

when the screen module for displaying the picture is a Mini LED screen module, the LVDS signal is sent to the deserializer through the host;

decoding the LVDS signal through the deserializer to obtain a decoded LVDS signal and sending the decoded LVDS signal to the second TCON chip;

and converting the decoded LVDS signals through a second TCON chip to obtain Mini LVDS signals, and sending the Mini LVDS signals to the Mini LED screen module for picture display.

In addition, in order to achieve the above object, the present invention also provides a signal checking device, including:

the detection module is used for detecting the picture display of the screen module in real time when the vehicle-mounted display screen performs a radiation immunity experiment in electromagnetic compatibility;

the display module is used for sending a working instruction to the TCON chip when abnormal picture display is detected and a toggle signal of the switching device is detected, so that the TCON chip outputs a fixed picture signal to the screen module for display;

and the judging module is used for determining whether the link between the TCON chip and the screen module is normal or not according to the picture displayed by the screen module.

In addition, in order to achieve the above object, the present invention also provides a vehicle-mounted display screen, including: a memory, a processor, and a signal checking program stored on the memory and executable on the processor, the signal checking program configured to implement the steps of the signal checking method as described above.

In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a signal checking program which, when executed by a processor, implements the steps of the signal checking method as described above.

According to the invention, when the radiation immunity experiment in electromagnetic compatibility is carried out on the vehicle-mounted display screen, real-time detection is carried out on the picture display of the screen module; when abnormal display of the picture is detected and a toggle signal of the switching device is detected, a working instruction is sent to the TCON chip, so that the TCON chip outputs a fixed picture signal to the screen module for display; and determining whether the link between the TCON chip and the screen module is normal or not according to the picture displayed by the screen module. Through the mode, when the screen display is abnormal, the switch device is shifted, a working instruction is sent to the TCON chip, a fixed screen signal is output to the screen module for display, whether a corresponding link is normal or not is determined according to the displayed screen, the problems of time and labor waste in different display positioning of the screen such as a screen, a black screen and the like are solved, the cost is increased little, the positioning problem is convenient and quick, and the universality is high.

Drawings

FIG. 1 is a schematic diagram of a vehicle-mounted display screen of a hardware operating environment according to an embodiment of the present invention;

fig. 2 is a flowchart of a first embodiment of a signal checking method according to the present invention;

FIG. 3 is a flowchart illustrating a signal checking method according to a second embodiment of the present invention;

FIG. 4 is a flowchart of a third embodiment of a signal checking method according to the present invention;

FIG. 5 is a schematic diagram of a signal transmission link of an OLED screen module according to a third embodiment of the signal checking method of the present invention;

fig. 6 is a schematic diagram of a signal transmission link of a Mini LED screen module in a third embodiment of the signal checking method according to the present invention;

fig. 7 is a block diagram of a first embodiment of a signal checking device according to the present invention.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle-mounted display screen of a hardware running environment according to an embodiment of the present invention.

As shown in fig. 1, the in-vehicle display screen may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.

Those skilled in the art will appreciate that the configuration shown in fig. 1 is not limiting and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

As shown in fig. 1, an operating system, a network communication module, a user interface module, and a signal checking program may be included in the memory 1005 as one type of storage medium.

In the in-vehicle display screen shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the vehicle-mounted display screen can be arranged in the vehicle-mounted display screen, and the vehicle-mounted display screen calls the signal checking program stored in the memory 1005 through the processor 1001 and executes the signal checking method provided by the embodiment of the invention.

An embodiment of the present invention provides a signal checking method, referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the signal checking method of the present invention.

In this embodiment, the signal checking method is applied to a vehicle-mounted display screen, where the vehicle-mounted display screen includes: the control circuit board and the screen module, the host computer with control circuit board reaches the screen module links to each other in proper order, control circuit board includes switching device, MCU and TCON chip, switching device one end is connected high level, and the other end is connected MCU or the TCON chip, the signal investigation method includes following steps:

step S10: and when the vehicle-mounted display screen performs a radiation immunity experiment in electromagnetic compatibility, detecting the picture display of the screen module in real time.

It should be noted that electromagnetic compatibility (EMC) is a comprehensive evaluation of the interference (EMI) and anti-interference capability (EMS) of an electronic product in terms of electromagnetic field, and is one of the most important indexes of product quality, and electronic devices such as multimedia entertainment, bluetooth communication, satellite positioning, braking, and safety air bags of an automobile may emit interference signals of different wavebands to the surroundings, or the automobile enters a strong interference area, and the operation is malfunctioning due to the fact that the vehicle-mounted electronic system is too sensitive, so that the normal operation of the electronic device is affected, resulting in inconvenient driving.

It can be understood that the radiation immunity test is a test for testing the anti-interference degree of the electronic equipment, the electric equipment or the system on the radiation, and the anti-interference degree of the corresponding vehicle-mounted display screen on the radiation can be detected by the vehicle-mounted display screen.

In a specific implementation, when the vehicle-mounted display screen performs a radiation immunity experiment in electromagnetic compatibility, video playing of the vehicle-mounted display screen may be abnormal due to interference signals, so that real-time detection on picture display of the screen module is required.

Step S20: when abnormal display of the picture is detected and a toggle signal of the switching device is detected, a working instruction is sent to the TCON chip, so that the TCON chip outputs a fixed picture signal to the screen module for display.

The anomaly includes a screen pattern, a black screen, etc., where the screen pattern is a stripe, a spot or a color block different from a normal color, or has a situation of position inversion, confusion, screen shake, distortion, etc., and the black screen is completely black, and does not display a picture, as the same as the case where the power is not supplied, the embodiment is not particularly limited.

It should be noted that, the switch device may be a dial switch or a jumper cap, the dial switch is an address switch for operation control, a binary coding principle of 0/1 is adopted, most of the dial switches are used for program control boards, performance circuits of control components are turned on and off, the jumper cap is a small square plastic cap on hardware such as a motherboard, a hard disk, etc., metal is arranged inside the jumper cap, and the jumper cap is used for changing a voltage drop generated by a metal connecting wire for connecting two requirement points of a circuit board (PCB) to change performance, which is not particularly limited in this embodiment.

It can be understood that the TCON chip is a main control chip of the liquid crystal display panel, and has the function of converting the received image data signal into a synchronous line control signal and a synchronous data output signal, so as to realize the display of the image on the liquid crystal display panel.

In a specific implementation, when the screen display of the screen has the phenomena of screen pattern, screen blacking and the like, the switch device is shifted, a working instruction is sent to the TCON chip, the TCON chip outputs a fixed screen signal to the screen module, and the screen module displays a fixed color bar screen generated according to the fixed screen signal.

Further, for performing anomaly localization, the step S20 includes: when one end of the switching device is connected with a high level and the other end of the switching device is connected with the IO port of the MCU, after a toggle signal of the toggle switch is detected, an IIC instruction is sent to the TCON chip through the MCU, so that the TCON chip enters a fast mode and outputs a fixed picture signal to the screen module for display.

It should be noted that the MCU is a micro control unit (Microcontroller Unit), also called a single-chip microcomputer or a single-chip microcomputer, which is to properly reduce the frequency and specification of the central processing unit, integrate the peripheral interfaces such as the memory, the counter, the USB, the a/D conversion, UART, PLC, DMA, and the like, and even the Mini LED driving circuit on a single chip, form a chip-level computer, and perform different combination control for different application occasions.

It can be understood that the IIC instruction is an instruction transmitted by the IIC channel, where the IIC instruction is used to control the TCON chip to perform a fast mode.

In a specific implementation, different TCON chip designs are different, and some of them pull out the best pin, and only the pull-up pin of the switch needs to be externally pulled to enter the best mode. If some chips can only enter a fast mode through software and output a fixed picture signal, a preset pin needs to be designed on the MCU, and the MCU sends an IIC instruction for entering the fast mode to the TCON chip by pulling the MCU preset pin.

It can be understood that when one end of the switching device is connected with a high level and the other end is connected with the IO port of the MCU, that is, the TCON chip does not pull out the bin pin, the bin mode can only be entered through software.

Further, in order to perform the anomaly positioning, the step S20 further includes: when one end of the switching device is connected with a high level and the other end of the switching device is connected with a fast pin of the TCON chip, after a toggle signal of the toggle switch is detected, the TCON chip is controlled to directly enter a fast mode, and a fixed picture signal is output to a screen module for display.

It can be understood that when one end of the switching device is connected with a high level and the other end is connected with the best pin of the TCON chip, that is, the TCON chip pulls out the best pin, the best mode can be directly entered by pulling up the pin of the switch through the outside.

Step S30: and determining whether a link between the TCON chip and the screen module is normal or not according to the picture displayed by the screen module.

It can be understood that whether the link between the TCON chip and the screen module is normal is determined according to whether the frame displayed by the screen module is a fixed color bar frame.

In the embodiment, when the vehicle-mounted display screen performs a radiation immunity experiment in electromagnetic compatibility, real-time detection is performed on the picture display of the screen module; when abnormal display of the picture is detected and a toggle signal of the switching device is detected, a working instruction is sent to the TCON chip, so that the TCON chip outputs a fixed picture signal to the screen module for display; and determining whether the link between the TCON chip and the screen module is normal or not according to the picture displayed by the screen module. According to the invention, by toggling the switch device when the display of the picture is abnormal, sending the working instruction to the TCON chip and outputting the fixed picture signal to the screen module for display, determining whether the corresponding link is normal according to the displayed picture, the problems of time and labor waste in different display positioning of the picture such as screen display, black screen and the like are solved, the cost is increased little, the positioning problem is convenient and quick, and the universality is high.

Referring to fig. 3, fig. 3 is a flowchart illustrating a second embodiment of the signal checking method according to the present invention.

Based on the first embodiment, the step S30 in the signal checking method of the present embodiment includes:

step S301: and when the picture displayed by the screen module is a preset picture, judging that the link between the TCON chip and the screen module is normal, wherein the fault comes from the link before the TCON chip.

It should be noted that the preset picture may be a fixed color bar picture generated according to a fixed picture signal.

It can be understood that when the screen module displays a fixed color bar screen, it indicates that the link between the TCON chip and the screen module is normal, and before the failure comes from the TCON chip, the signal transmission of the link before the TCON chip needs to be further checked.

Further, in order to determine the fault location, after the step S301, the method further includes: when a toggle signal of the switching device is detected, an IIC instruction is sent to a deserializer through the MCU, so that the deserializer outputs a fixed picture signal to a screen module for display; when the toggle signal of the switching device is detected, outputting a fixed picture signal to a screen module for display through the deserializer; judging whether a link between the deserializer and the TCON chip is normal or not according to a picture displayed by the screen module; when the picture displayed by the screen module is a preset picture, judging that the link between the deserializer and the TCON chip is normal, and the fault comes from the link before the deserializer; and when the picture displayed by the screen module is not a preset picture, judging that the link between the deserializer and the TCON chip is faulty.

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

It can be understood that the switch of the deserializer is toggled, the deserializer outputs a fixed picture signal, the picture is not interfered by input, if the picture is displayed or abnormal, the link fault between the deserializer and the TCON chip is indicated, the deserializer and the TCON chip are sequentially replaced for cross verification, and the specific fault position is determined.

It is worth to describe that, if the frame displayed by the screen module is the preset frame, after the dial-back switch is restarted, the screen module is displayed normally.

Step S302: and when the picture displayed by the screen module is not a preset picture, judging that the link between the TCON chip and the screen module is faulty.

It can be understood that when the frame displayed by the screen module is not a fixed color bar frame, it indicates that a fault exists in the link between the TCON chip and the screen module, and the specific fault location can be determined by replacing the TCON chip and the screen module in turn for cross-validation.

In this embodiment, when the frame displayed by the screen module is a preset frame, it is determined that the link between the TCON chip and the screen module is normal, and the failure is from the link before the TCON chip; and when the picture displayed by the screen module is not a preset picture, judging that the link between the TCON chip and the screen module is faulty. By the mode, whether link transmission is normal or not is judged according to the picture displayed by the screen module, the problem of convenient and quick positioning is solved, and the signal quality and the universality are improved conveniently and pertinently.

Referring to fig. 4, fig. 4 is a flowchart of a third embodiment of the signal checking method according to the present invention.

Based on the above first embodiment, 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 computer is sequentially connected with the deserializer, the first TCON chip, and the OLED screen module, the deserializer is sequentially connected with the second TCON chip and the Mini LED screen module, and in the signal checking method of this embodiment, after step S10, the method further includes:

step S01: and when the abnormality of the picture display is not detected, judging a screen module of the picture display.

It should be noted that, the screen module includes an OLED screen module and a Mini LED screen module, and according to the OLED screen module and the Mini LED screen module, there is a corresponding signal transmission link.

Step S02: when the screen module for displaying the picture is an OLED screen module, the LVDS signal is sent to the deserializer through the host.

It should be noted that, the OLED screen module, that is, the OLED display screen, refers to an organic light-emitting diode (organic light-EmittingDiode, OLED) that has self-luminescence, and does not need a backlight source, and has high contrast, thin thickness, wide viewing angle, fast reaction speed, wide application temperature range, and simple structure and manufacturing process.

It is understood that the host refers to a terminal device that transmits and receives information, and the host transmits LVDS signals to the deserializer.

It should be understood that the LVDS signal, i.e. the Low voltage differential signal (Low-Voltage Differential Signaling), is a differential signal technology with Low power consumption, low bit error rate, low crosstalk and Low radiation, the data transmission rate can reach 155Mbps or more, and the core of the LVDS technology is to use a very Low voltage swing to differentially transmit data at a high speed, so that point-to-point or point-to-multipoint connection can be realized.

Step S03: and decoding the LVDS signal through the deserializer, converting the LVDS signal into an EDP signal and transmitting the EDP signal to the first TCON chip.

It should be noted that, the deserializer is an interface circuit in high-speed data communication, plays an important role in optical fiber data propagation and short-distance chip interconnection, can effectively reduce pin count and track count, improves communication data rate, and can increase utilization rate of existing resources due to the improvement of data rate.

It can be understood that the deserializer is configured to deserialize a serial signal into a parallel signal, decode the LVDS signal through the deserializer, parse the LVDS signal through the internal firmware, convert the LVDS signal into an EDP signal, and send the EDP signal to the first TCON chip.

It should be noted that the EDP signal is a signal transmitted through an EDP interface, and the EDP interface is a fully digital interface based on DisplayPort architecture and protocol, which can use a simpler connector and fewer pins to transmit a high-resolution signal, and can realize simultaneous transmission of multiple data, and the transmission rate is far higher than that of an LVDS signal.

Step S04: and carrying out operation processing on the EDP signals through the first TCON chip, converting the EDP signals into GOA signals, and sending the GOA signals to the OLED screen module for picture display.

It should be noted that, the OLED screen module and the Mini LED screen module have different screen lighting mechanisms, so that the corresponding TCON chips are different.

It can be understood that, according to the preset receiving protocol of the first TCON chip, an EDP signal corresponding to the preset protocol is sent to the first TCON chip, and the first TCON chip operates through the firmware of the first TCON chip and automatically outputs a corresponding GOA signal to the screen to light the screen.

It should be noted that the GOA signal, i.e. the array substrate row driving signal, is a signal for controlling the lighting area and color of the OLED screen.

As shown in fig. 5, fig. 5 is a schematic diagram of a signal transmission link of an OLED screen module, where the signal transmission link includes a host, a control circuit board and the OLED screen module, and the control circuit board includes an MCU, a dial switch, a deserializer, a first TCON chip, and the host, the deserializer, the first TCON chip and the OLED screen module are sequentially connected.

Further, after the step S01, the method further includes: when the screen module for displaying the picture is a Mini LED screen module, the LVDS signal is sent to the deserializer through the host; decoding the LVDS signal through the deserializer to obtain a decoded LVDS signal and sending the decoded LVDS signal to the second TCON chip; and converting the decoded LVDS signals through a second TCON chip to obtain Mini LVDS signals, and sending the Mini LVDS signals to the Mini LED screen module for picture display.

It should be noted that, the second TCON chip is also called a secondary conversion chip, and the second TCON chip has a regional dimming effect, so that the pictures of the Mini LED screen only amount the corresponding display area, the contrast ratio is improved, and the display effect is better than that of the Mini LED screen without the regional dimming effect.

It can be understood that the Mini LED screen module is an LCD screen with Mini LED effect, namely an LCD screen with zonal light control effect.

It is worth to describe that the second TCON chip, namely the second conversion chip, performs the second conversion on the LVDS signal, and converts the LVDS signal into the Mini LVDS signal.

It can be understood that the Mini LVDS signal is a high-speed serial differential signal, the LVDS low-voltage differential signal is only suitable for high-speed point-to-point, the Mini LVDS signal can be applied to multiple points, and compared with the LVDS signal, the Mini LVDS signal has controllable transition time and provides a fail-safe receiver option for bus idle conditions.

It is understood that Mini LVDS signals are sent to the Mini LED screen lighting screen.

As shown in fig. 6, fig. 6 is a schematic diagram of a signal transmission link of a Mini LED screen module, where the diagram includes a host, a control circuit board and a Mini LED screen module, and the control circuit board includes an MCU, a dial switch, a deserializer, a second TCON chip, where the host, the deserializer, the second TCON chip and the OLED screen module are sequentially connected.

In the embodiment, when no abnormal display of the picture is detected, the screen module for displaying the picture is judged; when the screen module for displaying the picture is an OLED screen module, the host sends LVDS signals to the deserializer; decoding the LVDS signal through the deserializer, converting the LVDS signal into an EDP signal and transmitting the EDP signal to the first TCON chip; and carrying out operation processing on the EDP signals through the first TCON chip, converting the EDP signals into GOA signals, and sending the GOA signals to the OLED screen module for picture display. By the above mode, when the image display is not abnormal, the host sends LVDS signals to the deserializer for conversion, and the signals are converted into signals corresponding to the lighted screen for image display.

Referring to fig. 7, fig. 7 is a block diagram illustrating a first embodiment of a signal checking device according to the present invention.

As shown in fig. 7, the signal checking device provided in the embodiment of the present invention includes:

the detection module 10 is used for detecting the picture display of the screen module in real time when the vehicle-mounted display screen performs a radiation immunity experiment in electromagnetic compatibility;

the display module 20 is configured to send a working instruction to the TCON chip when an abnormality in display of a screen is detected and a toggle signal of the switching device is detected, so that the TCON chip outputs a fixed screen signal to the screen module for display;

and the judging module 30 is used for determining whether the link between the TCON chip and the screen module is normal according to the picture displayed by the screen module.

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

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

In an embodiment, the judging module 30 is further configured to judge that a link between the TCON chip and the screen module is normal when the screen displayed by the screen module is a preset screen, and the failure is from a link before the TCON chip; and when the picture displayed by the screen module is not a preset picture, judging that the link between the TCON chip and the screen module is faulty.

In an embodiment, the judging module 30 is further configured to send an IIC instruction to the deserializer through the MCU when detecting the toggle signal of the switching device, so that the deserializer outputs a fixed picture signal to the screen module for displaying; when the toggle signal of the switching device is detected, outputting a fixed picture signal to a screen module for display through the deserializer; judging whether a link between the deserializer and the TCON chip is normal or not according to a picture displayed by the screen module; when the picture displayed by the screen module is a preset picture, judging that the link between the deserializer and the TCON chip is normal, and the fault comes from the link before the deserializer; and when the picture displayed by the screen module is not a preset picture, judging that the link between the deserializer and the TCON chip is faulty.

In an embodiment, the detection module 10 is further configured to determine a screen module for displaying a picture when no abnormality is detected in the display of the picture; when the screen module of the picture display is an Oled screen module, the LVDS signal is sent to the deserializer through the host; decoding the LVDS signal through the deserializer, converting the LVDS signal into an EDP signal and transmitting the EDP signal to the first TCON chip; and carrying out operation processing on the EDP signals through the first TCON chip, converting the EDP signals into GOA signals, and sending the GOA signals to the Oled screen module for picture display.

In an embodiment, the detection module 10 is further configured to send an LVDS signal to the deserializer through the host when the screen module for displaying the picture is an LCD screen module; decoding the LVDS signal through the deserializer to obtain a decoded LVDS signal and sending the decoded LVDS signal to the second TCON chip; and converting the decoded LVDS signals through a second TCON chip to obtain Mini LVDS signals, and sending the Mini LVDS signals to the Mini led screen module for picture display.

The vehicle-mounted display screen adopts all the technical schemes of all the embodiments, so that the vehicle-mounted display screen has at least all the beneficial effects brought by the technical schemes of the embodiments, and is not described in detail herein.

In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a signal checking program, and the signal checking program realizes the steps of the signal checking method when being executed by a processor.

Because the storage medium adopts all the technical schemes of all the embodiments, the storage medium has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.

It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.

It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.

In addition, technical details not described in detail in this embodiment may refer to the signal checking method provided in any embodiment of the present invention, and are not described herein.

Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. The signal checking method is characterized by being applied to a vehicle-mounted display screen, and the vehicle-mounted display screen comprises the following steps: the control circuit board and the screen module, the host computer with control circuit board reaches the screen module links to each other in proper order, control circuit board includes switching device, MCU and TCON chip, switching device one end is connected high level, and the other end is connected MCU or the TCON chip, the method includes:

2. The method of claim 1, wherein when an abnormality in the display of the screen is detected and a toggle signal of the switching device is detected, sending an operation command to the TCON chip to cause the TCON chip to output a fixed screen signal to the screen module for display, including:

3. The method of claim 1, wherein when an abnormality in the display of the screen is detected and a toggle signal of the switching device is detected, sending an operation command to the TCON chip to cause the TCON chip to output a fixed screen signal to the screen module for display, further comprising:

4. The method of claim 1, wherein determining whether a link between a TCON chip and a screen module is normal based on a picture displayed by the screen module comprises:

5. The method of claim 4, wherein when the screen displayed by the screen module is a preset screen, determining that the link between the TCON chip and the screen module is normal, and the failure is from a link before the TCON chip, further comprising:

6. The method of claim 1, wherein the control circuit board further comprises a deserializer, the screen module comprises an OLED screen module and a Mini LED screen module, the TCON chip comprises a first TCON chip and a second TCON chip, the host is sequentially connected with the deserializer, the first TCON chip and the OLED screen module, the deserializer is sequentially connected with the second TCON chip and the Mini LED screen module, and when the vehicle-mounted display screen performs the radiation immunity experiment in electromagnetic compatibility, the method further comprises:

7. The method of claim 6, wherein after determining the screen module of the screen display when the abnormality is not detected, further comprising:

8. A signal checking device, characterized in that the signal checking device comprises:

9. A vehicle-mounted display screen, characterized in that the vehicle-mounted display screen comprises: a memory, a processor, and a signal checking program stored on the memory and executable on the processor, the signal checking program configured to implement the signal checking method according to any one of claims 1 to 7.

10. A storage medium having stored thereon a signal checking program which, when executed by a processor, implements the signal checking method according to any one of claims 1 to 7.