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CN115834803B - Passenger vehicle display screen, display method and vehicle - Google Patents

Passenger vehicle display screen, display method and vehicle Download PDF

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Publication number
CN115834803B
CN115834803B CN202211474548.0A CN202211474548A CN115834803B CN 115834803 B CN115834803 B CN 115834803B CN 202211474548 A CN202211474548 A CN 202211474548A CN 115834803 B CN115834803 B CN 115834803B
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display
signal input
signal
module
input module
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CN115834803A (en
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李林峰
汪杨刚
曾俊雄
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Wuhan Haiwei Technology Co ltd
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Wuhan Haiwei Technology Co ltd
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Abstract

本发明属于车载显示技术领域,公开了一种副驾显示屏、显示方法以及车辆,该副驾显示屏包括依次连接的第一信号输入模块、切换器以及显示模块,所述副驾显示屏还包括切换控制模块和第二信号输入模块,所述切换控制模块分别通过集成电路总线与第一信号输入模块、第二信号输入模块以及切换器连接,所述第一信号输入模块与第二信号输入模块通过显示接口与所述切换器连接,所述第二信号输入模块设有外接接口,所述外接接口用于接入外部设备;所述第二信号输入模块,用于将所述外部设备输入的第二显示信号输出至所述切换器;所述切换器,用于在接收到所述切换控制模块的信号输出控制指令时,将所述第二显示信号输出至所述显示模块进行显示。

The present invention belongs to the field of vehicle-mounted display technology, and discloses a passenger display screen, a display method and a vehicle. The passenger display screen includes a first signal input module, a switch and a display module connected in sequence, and the passenger display screen also includes a switching control module and a second signal input module. The switching control module is respectively connected to the first signal input module, the second signal input module and the switch through an integrated circuit bus, the first signal input module and the second signal input module are connected to the switch through a display interface, and the second signal input module is provided with an external interface, and the external interface is used to connect to an external device; the second signal input module is used to output a second display signal input by the external device to the switch; the switch is used to output the second display signal to the display module for display when receiving a signal output control instruction from the switching control module.

Description

Auxiliary driving display screen, display method and vehicle
Technical Field
The invention relates to the technical field of vehicle-mounted display, in particular to a secondary driving display screen, a display method and a vehicle.
Background
At present, the display screens of new energy automobiles in the market are all pictures pushed by a vehicle-mounted host computer, and the display screens only need to feed back the hand touch points and display the pictures pushed by the host computer.
The scheme is applied to the auxiliary driving display screen of the automobile with partial entertainment property, so that the host computing power and memory resources are excessively consumed, the APP is not flexible enough to be added to the host, the current entertainment requirement of the auxiliary driving is very unfriendly, and therefore, the technical problem to be solved is urgent how to change the situation that the auxiliary driving display screen can only receive the single pushing picture of the host to display is solved.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a secondary driving display screen, a display method and a vehicle, and aims to solve the technical problem that the secondary driving display screen in the prior art can only receive a main machine push picture to display a single picture.
In order to achieve the above purpose, the invention provides a secondary driving display screen, which comprises a first signal input module, a switcher and a display module which are sequentially connected, wherein the secondary driving display screen further comprises a switching control module and a second signal input module, the switching control module is respectively connected with the first signal input module, the second signal input module and the switcher through an integrated circuit bus, the first signal input module and the second signal input module are connected with the switcher through a display interface, and the second signal input module is provided with an external interface which is used for accessing external equipment;
The switching control module is used for controlling the first signal input module to stop outputting a first display signal to the switcher and controlling the second signal input module to start working when detecting that the external equipment is inserted into the external interface;
The second signal input module is configured to output a second display signal input by the external device to the switcher;
The switcher is used for outputting the second display signal to the display module for display when receiving the signal output control instruction of the switching control module.
Optionally, the second signal input module includes a converter, an input end of the converter is connected with the external interface, an output end of the converter is connected with the switcher, and a control end of the converter is connected with the switching control module through the integrated circuit bus;
The converter is used for receiving an interface signal input by the external equipment and converting the interface signal into a second display signal;
the converter is further configured to output the second display signal to the switcher when receiving a working instruction of the switching control module.
Optionally, the second signal input module is provided with an external interface, the external interface includes a Type-C interface, the Type-C interface is connected with the external device, and a Type-C signal of the external device is transmitted into the converter.
Optionally, the first signal input module comprises a deserializer, wherein a signal input end of the deserializer is connected with the audio-video controller, and a signal input end of the deserializer;
the switching control module is further configured to pull down a sleep pin of the deserializer after the deserializer is informed to go to sleep, and control the first signal input module to stop outputting a first display signal to the switcher;
And the switching control module is also used for pulling up the sleep pin of the converter and controlling the second signal input module to start working.
Optionally, the deserializer is configured to receive the sleep notification sent by the switching control module, and feed back the sleep notification to the audio/video controller through the low-voltage differential signal, so that the audio/video controller stops sending the low-voltage differential signal.
Optionally, the switching control module is further configured to notify the deserializer to go to sleep, and pull down the sleep pin of the deserializer after an interval preset time.
Optionally, the switching control module is further configured to pull up the sleep pin of the deserializer, and output the first display signal to the switcher;
And the switching control module is also used for pulling down the sleep pin of the converter, controlling the converter to carry out sleep mode, and stopping the output of the second display signal to the switcher.
Optionally, the deserializer is configured to, when receiving a display signal input by the audio/video controller, perform format conversion on the display signal to obtain a first display signal, output the first display signal to the switcher, and output the first display signal to the display module for display through the switcher.
In addition, in order to achieve the above object, the present invention further provides a display method of a secondary driving display screen, which is characterized in that the secondary driving display method is applied to the secondary driving display screen as described above, the secondary driving display screen includes a first signal input module, a switch, and a display module that are sequentially connected, the secondary driving display screen further includes a switching control module and a second signal input module, the switching control module is connected with the first signal input module, the second signal input module, and the switch through an integrated circuit bus, the first signal input module and the second signal input module are connected with the switch through a display interface, the second signal input module is provided with an external interface, and the external interface is used for accessing an external device, and the method includes:
when the switching control module detects that the external equipment is inserted into the external interface, the first signal input module is controlled to stop outputting a first display signal to the switcher, and the second signal input module is controlled to start working;
The second signal input module outputs a second display signal input by the external device to the switcher;
and when receiving a signal output control instruction of the switching control module, the switcher outputs the second display signal to the display module for display.
In addition, in order to achieve the above object, the present invention also provides a vehicle, which is characterized in that the vehicle includes an audio/video controller, a main display screen, and a secondary driving display screen as described above or a display method using the secondary driving display screen as described above.
The invention provides a secondary driving display screen which comprises a first signal input module, a switcher and a display module which are sequentially connected, and further comprises a switching control module and a second signal input module, wherein the switching control module is respectively connected with the first signal input module, the second signal input module and the switcher through an integrated circuit bus, the first signal input module and the second signal input module are connected with the switcher through display interfaces, the second signal input module is provided with an external interface which is used for being connected with external equipment, the switching control module is used for controlling the first signal input module to stop outputting a first display signal to the switcher and controlling the second signal input module to start working when the external equipment is detected to be inserted, and the second signal input module is used for outputting a second display signal input by the external equipment to the switcher when a signal output control instruction of the switching control module is received. When the external equipment is detected to be plugged in, the switching control module controls the first signal input module to stop outputting the first display signal and controls the second signal input module to output the second display signal to the switcher, and the switcher outputs the second display signal to the display module for display.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a functional block diagram of a first embodiment of a secondary drive display screen of the present invention;
FIG. 2 is a functional block diagram of an embodiment of a secondary driving display screen according to the present invention;
FIG. 3 is a functional block diagram of an embodiment of a secondary driving display screen according to the present invention;
Fig. 4 is a schematic flow chart of an embodiment of the secondary driving display screen of the present invention.
Reference numerals illustrate:
Reference numerals Name of the name Reference numerals Name of the name
10 First signal input module 20 Switching device
30 Display module 40 Switching control module
50 Second signal input module 60 External device
70 Audio-video controller 101 Deserializer
501 Converter 502 External connection interface
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
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a secondary driving display screen.
Referring to fig. 1, in the embodiment of the invention, the display device comprises a first signal input module 10, a switcher 20, a display module 30, a switching control module 40 and a second signal input module 50, wherein a first end of the first signal input module 10 is connected with the first end of the switcher 20, an output end of the switcher 20 is connected with the display module 30, a first end of the switching control module 40 is connected with a second end of the first signal input module 10, a second end of the switching control module 40 is connected with a second end of the switcher 20, a first end of the switching control module 40 is connected with a second end of the second signal input module 50, and a first end of the second signal input module 50 is connected with a third end of the switcher 20.
The first signal input module 10 is configured to output a first display signal to the switcher.
The display signal is a DP signal (Decentralized Periphery, DP), known as PROFIBUS-DP, which has high speed and low cost for communication of the device level control system with the distributed I/O. It forms PROFIBUS standard together with PROFIBUS-PA (Process Automation, PA) and PROFIBUS-FMS (Fieldbus Message Specification, FMS). PROFIBUS-DP is used for high-speed data transfer at the field level. The master periodically reads the input information of the slave and periodically transmits the output information to the slave. The bus cycle time must be shorter than the master station (PLC) program cycle time. In addition to periodic user data transmission, PROFIBUS-DP also provides the aperiodic communication required by the intelligent device for configuration, diagnostics and alarm processing.
And the switcher 20 is configured to output the second display signal to the display module for display when receiving a signal output control instruction of the switching control module.
It can be understood that the output control instruction is sent by the switching control module, and controls the switcher to output the second display signal to the display module for display.
It should be understood that the switcher receives the first display signal sent by the first input module by default, inputs the first display signal to the display module for display, and switches to output the second display input signal when receiving the output control instruction.
In a specific implementation, when external equipment is accessed, the switcher receives an output control instruction sent by the switching control module, switches the output first display signal into a second display signal, and outputs the second display signal after switching to the display module for display.
The display module 30 receives the display signal output by the switcher.
It should be noted that, the display module receives the display signal and converts the display signal into a corresponding picture, and the corresponding picture is displayed on the display screen.
In a specific implementation, the switcher outputs a first display signal to the display module, the display module displays a picture pushed by the vehicle-mounted host, and when the external equipment is accessed, the switcher outputs a second display signal to the display module, and the display module displays a picture transmitted by the external equipment.
And the switching control module 40 is configured to control the first signal input module to stop outputting the first display signal to the switcher and control the second signal input module to start working when detecting that the external device is plugged into the external interface.
It can be understood that the switching control module is a micro control unit (Microcontroller Unit, MCU), also called a single chip Microcomputer (SINGLE CHIP microcomputers) or a single chip Microcomputer, which properly reduces the frequency and specification of the central processing unit (Central Process Unit, CPU), and integrates peripheral interfaces such as a memory, a counter, a USB, a/D conversion, UART, PLC, DMA, etc., even an LCD driving circuit, on a single chip to form a chip-level computer, so as to perform different combination control for different application occasions. Such as cell phones, PC peripherals, remote controls, to automotive electronics, industrial stepper motors, robotic arm control, etc.
In a specific implementation, the switching control module communicates with the first signal input module, the switcher and the second signal input module through an integrated circuit bus (Inter-INTEGRATED CIRCUIT, IIC) to control the output of the scheduling chip in real time.
And a second signal input module 50 for outputting a second display signal input from the external device to the switcher.
It should be noted that, the signal input by the external device is converted into the second display signal through the second signal input module, and the second signal input module outputs the converted second display signal to the switcher.
Further, referring to fig. 2, in order to implement the picture importing of the external device into the display module, the second signal input module 50 includes a converter 501 and an external interface 502, a first end of the converter 501 is connected to an output end of the external interface 502, a second end of the converter 501 is connected to a third end of the switching control module 40, a third end of the converter 501 is connected to a third end of the switch 20, and an input end of the external interface 502 is connected to the external device 60.
The switching controller 40 is further configured to control the first signal input module to stop outputting the first display signal to the switcher, and is further configured to pull up the sleep pin of the converter to control the second signal input module to start working.
When the external device is detected to be accessed, the switching controller sends a sleep signal to the first module, and controls the first signal input module to stop outputting the first display signal to the switcher.
It will be appreciated that pins, also known as pins, are connections from the internal circuitry of the integrated circuit (chip) to peripheral circuitry, and all pins form the interface to the chip. A section of the end of the lead is soldered to a pad on the printed board.
The converter 501 is configured to receive an interface signal input by the external device, convert the interface signal into a second display signal, and output the second display signal to the switcher when receiving a working instruction of the switching control module.
It should be understood that a converter refers to a device that converts one signal into another signal. The signal is in the form of information or carrier. In automated meter devices and automatic control systems, one signal is often converted to another signal that is compared to a standard or reference quantity in order to couple the two types of meters, and thus the converter is often an intermediate link between the two meters (or devices).
It should be noted that, the interface signal is a signal input by an external device, such as a Type-C signal, a Lightning interface, and a Micro USB interface, which is not limited in this embodiment.
The external interface 502 is configured to connect to the external device, and transmit an interface signal sent by the external device to the converter.
It can be appreciated that the external device is connected to a corresponding external interface, for example, the Type-C data line is connected to the Type-C interface, and the lighting data line is connected to the lighting interface, which is not limited in this embodiment.
The external device 503 is configured to send an interface signal.
Further, referring to fig. 3, in order to implement the picture importing of the external apparatus into the display module, the first signal input module includes a deserializer 101, a first end of the deserializer 101 is connected to the first end of the switching control module 40, and a second end of the deserializer 101 is connected to the audio/video controller 70.
The switching control module 40 is further configured to notify the deserializer to go to sleep, and pull down the sleep pin of the deserializer after a preset time interval.
The preset interval time may be, for example, 100ms or 150ms, which is not limited in this embodiment. After a preset interval time, the switch has no first input signal which is not transmitted, and at this time, the switch starts to receive the second display signal transmitted by the converter.
It will be appreciated that when the switch is started, the deserializer goes to sleep, and both cannot pass the first display signal and the second display signal into the switch at the same time.
The deserializer 101 is configured to receive a sleep notification sent by the switching control module, and feed back the sleep notification to the audio/video controller through a low-voltage differential signal, so that the audio/video controller stops sending the low-voltage differential signal.
It should be appreciated that Low Voltage differential signaling (Low Voltage DIFFERENTIAL SIGNALING, LVDS), LVDS transmission support rates are typically above 155Mbps (about 77 MHz). LVDS is a low swing differential signaling technology that enables signals to be transmitted at rates of several hundred Mbps over differential PCB wire pairs or balanced cables with low voltage amplitude and low current drive output achieving low noise and low power consumption.
The audio/video controller 70 is configured to send a low voltage differential signal to the deserializer, and stop sending the low voltage differential signal when feedback is received.
When feedback from the deserializer is not received, a low-voltage differential signal is sent to the deserializer, and the low-voltage differential signal corresponds to a picture of the main screen.
Further, referring to fig. 3, in order to show the picture of the main display screen to the display module, the first signal input module includes a deserializer 101, a first end of the deserializer 101 is connected to the first end of the switching control module 40, a second end of the deserializer 101 is connected to the audio/video controller 70, a third end of the deserializer 101 is connected to the switcher, an output end of the switcher is connected to the display module, and a third end of the switching control module 40 is connected to the converter 501.
The switching control module is also used for pulling up the sleep pin of the deserializer to output the first display signal to the switcher, and pulling down the sleep pin of the converter to control the converter to carry out sleep mode and stop the output of the second display signal to the switcher.
It should be noted that, pull up the sleep pin of the deserializer, the deserializer starts to work normally.
It will be appreciated that the converter sleep pin is pulled low and the converter stops converting the interface signal of the external device to the second display signal.
In a specific implementation, the deserializer sleep pin cannot be pulled up only, but the converter sleep pin is not pulled down, and the deserializer and the converter cannot simultaneously transmit the first display signal and the second display signal to the switcher, and the switcher can only receive one display signal and transmit the display signal to the display module.
And the deserializer is used for carrying out format conversion on the display signal when receiving the display signal input by the audio/video controller to obtain a first display signal, outputting the first display signal to the switcher, and outputting the first display signal to the display module for display through the switcher.
It can be understood that the display signal input by the audio/video controller is an LVDS signal, and the deserializer converts the LVDS signal into a first display signal.
In a specific implementation, the converter enters a sleep mode, stops sending the second display signal to the switcher, and the deserializer transmits the converted first display signal to the switcher, and the switcher transmits the first display signal to the display module, and the display module displays the picture pushed by the main screen.
Referring to fig. 4, fig. 4 is a flowchart illustrating a first embodiment of a display method of a secondary driving display screen according to the present invention.
In a first embodiment, the display method of the secondary driving display screen includes the following steps:
Step S10, when the switching control module detects that the external device is plugged into the external interface, the switching control module controls the first signal input module to stop outputting the first display signal to the switcher, and controls the second signal input module to start working.
It can be understood that the switching control module is a micro control unit (Microcontroller Unit, MCU), also called a single chip Microcomputer (SINGLE CHIP microcomputers) or a single chip Microcomputer, which properly reduces the frequency and specification of the central processing unit (Central Process Unit, CPU), and integrates peripheral interfaces such as a memory, a counter, a USB, a/D conversion, UART, PLC, DMA, etc., even an LCD driving circuit, on a single chip to form a chip-level computer, so as to perform different combination control for different application occasions. Such as cell phones, PC peripherals, remote controls, to automotive electronics, industrial stepper motors, robotic arm control, etc.
In a specific implementation, the switching control module communicates with the first signal input module, the switcher and the second signal input module through an integrated circuit bus (Inter-INTEGRATED CIRCUIT, IIC) to control the output of the scheduling chip in real time.
In step S20, the second signal input module outputs the second display signal input by the external device to the switcher.
It should be noted that, the signal input by the external device is converted into the second display signal through the second signal input module, and the second signal input module outputs the converted second display signal to the switcher.
And step S30, when receiving a signal output control instruction of the switching control module, the switcher outputs the second display signal to the display module for display.
It can be understood that the output control instruction is sent by the switching control module, and controls the switcher to output the second display signal to the display module for display.
It should be understood that the switcher receives the first display signal sent by the first input module by default, inputs the first display signal to the display module for display, and switches to output the second display input signal when receiving the output control instruction.
In a specific implementation, when external equipment is accessed, the switcher receives an output control instruction sent by the switching control module, switches the output first display signal into a second display signal, and outputs the second display signal after switching to the display module for display.
According to the embodiment, when the switching control module detects that the external equipment is inserted into the external interface, the first signal input module is controlled to stop outputting a first display signal to the switcher, the second signal input module is controlled to start working, the second display signal input by the external equipment is output to the switcher through the second signal input module, when a signal output control instruction of the switching control module is received by the switcher, the second display signal is output to the display module for display, and through the mode, the auxiliary driving display screen can display pictures transmitted by the external equipment.
In order to achieve the above object, the present invention further provides a vehicle, which includes an audio/video controller, a main display screen, and a secondary driving display screen as described above or a display method using the secondary driving display screen as described above. The specific structure of the vehicle refers to the above embodiments, and since the vehicle adopts all the technical solutions of all the embodiments, at least the vehicle has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (8)

1. The auxiliary driving display screen is characterized by comprising a first signal input module, a switcher and a display module which are sequentially connected, and further comprises a switching control module and a second signal input module, wherein the switching control module is respectively connected with the first signal input module, the second signal input module and the switcher through an integrated circuit bus, the first signal input module and the second signal input module are connected with the switcher through a display interface, and the second signal input module is provided with an external interface which is used for accessing external equipment;
The switching control module is used for controlling the first signal input module to stop outputting a first display signal to the switcher and controlling the second signal input module to start working when detecting that the external equipment is inserted into the external interface;
The first signal input module comprises a deserializer, and the signal input end of the deserializer is connected with the audio-video controller;
The switching control module is further configured to pull down a sleep pin of the deserializer after the deserializer is informed to go to sleep, and control the first signal input module to stop outputting a first display signal to the switcher;
The switching control module is also used for pulling up the sleep pin of the converter and controlling the second signal input module to start working;
The deserializer is used for receiving the dormancy notification sent by the switching control module, and feeding back the dormancy notification to the audio-video controller through a low-voltage differential signal so as to enable the audio-video controller to stop sending the low-voltage differential signal;
The second signal input module is configured to output a second display signal input by the external device to the switcher;
The switcher is used for outputting the second display signal to the display module for display when receiving the signal output control instruction of the switching control module.
2. The secondary driving display screen as claimed in claim 1, wherein the second signal input module includes a converter, an input end of the converter is connected with the external interface, an output end of the converter is connected with the switcher, and a control end of the converter is connected with the switching control module through the integrated circuit bus;
The converter is used for receiving an interface signal input by the external equipment and converting the interface signal into a second display signal;
the converter is further configured to output the second display signal to the switcher when receiving a working instruction of the switching control module.
3. The secondary drive display screen of claim 2, wherein the second signal input module is provided with an external interface, the external interface comprises a Type-C interface, the Type-C interface is connected with the external device, and a Type-C signal of the external device is transmitted into the converter.
4. The secondary drive display screen of claim 1, wherein the switching control module is further configured to notify the deserializer to go to sleep, and pull down the sleep pin of the deserializer after a predetermined time interval.
5. The secondary drive display screen of claim 4, wherein the switching control module is further configured to pull up the deserializer sleep pin to output the first display signal to the switcher;
And the switching control module is also used for pulling down the sleep pin of the converter, controlling the converter to carry out sleep mode, and stopping the output of the second display signal to the switcher.
6. The secondary driving display screen as claimed in claim 5, wherein the deserializer is configured to perform format conversion on the display signal to obtain a first display signal when receiving the display signal input by the audio/video controller, and output the first display signal to the switcher, and output the first display signal to the display module for display through the switcher.
7. The display method of the secondary driving display screen is characterized in that the display method of the secondary driving display screen is applied to the secondary driving display screen according to any one of claims 1 to 6, the secondary driving display screen comprises a first signal input module, a switcher and a display module which are sequentially connected, the secondary driving display screen further comprises a switching control module and a second signal input module, the switching control module is respectively connected with the first signal input module, the second signal input module and the switcher through an integrated circuit bus, the first signal input module is connected with the second signal input module through a display interface, the second signal input module is provided with an external interface, and the external interface is used for accessing external equipment, and the method comprises the following steps:
when the switching control module detects that the external equipment is inserted into the external interface, the first signal input module is controlled to stop outputting a first display signal to the switcher, and the second signal input module is controlled to start working;
The first signal input module comprises a deserializer, and the signal input end of the deserializer is connected with the audio-video controller;
the switching control module pulls down a sleep pin of the deserializer after informing the deserializer to go to sleep, and controls the first signal input module to stop outputting a first display signal to the switcher;
when receiving the dormancy notification sent by the switching control module, the deserializer feeds back the dormancy notification to the audio-video controller through a low-voltage differential signal so that the audio-video controller stops sending the low-voltage differential signal;
The switching control module pulls up the sleep pin of the converter to control the second signal input module to start working;
The second signal input module outputs a second display signal input by the external device to the switcher;
and when receiving a signal output control instruction of the switching control module, the switcher outputs the second display signal to the display module for display.
8. A vehicle comprising an audio-visual controller, a primary display screen and a secondary drive display screen, the secondary drive display screen performing the method of displaying a secondary drive display screen as set forth in claim 7.
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