CN115220679B

CN115220679B - Vehicle-mounted multimedia system and screen initialization method thereof

Info

Publication number: CN115220679B
Application number: CN202111049583.3A
Authority: CN
Inventors: 左蓓蕾; 彭建云; 韦清涛; 杨赛; 郭泽江; 林剑伟
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2023-09-22
Anticipated expiration: 2041-09-08
Also published as: CN115220679A

Abstract

The invention discloses a vehicle-mounted multimedia system and a screen initialization method thereof, wherein the system comprises a multimedia host, a display screen and an LVDS transmission cable; the multimedia host comprises a host controller and an LVDS serializer, wherein the host controller is connected with the LVDS serializer; the display screen comprises a screen controller, an LVDS deserializer and a liquid crystal screen; the screen controller is connected with the LVDS deserializer and the liquid crystal screen; the LVDS deserializer is connected with the liquid crystal screen; the LVDS transmission cable is connected with the LVDS serializer and the LVDS deserializer, and an I2C channel is arranged in the LVDS transmission cable; and the host controller is used for reading the current screen version information corresponding to the display screen through the I2C channel, and completing the initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information. The system can realize decoupling of the multimedia host and the display screen, improve compatibility and adaptability of the multimedia host and the display screen, and ensure normal display of the screen.

Description

Vehicle-mounted multimedia system and screen initialization method thereof

Technical Field

The invention relates to the technical field of vehicle-mounted multimedia systems, in particular to a vehicle-mounted multimedia system and a screen initialization method thereof.

Background

Along with the popularity of the suspension modeling of the vehicle-mounted multimedia display screen, the modeling of the display screen is increasingly light and thin, and the separation of a multimedia host and the display screen of the vehicle-mounted multimedia system becomes a main stream. In the existing vehicle-mounted multimedia system, when a display screen is replaced, for example, when display screen parts such as a screen, a touch screen and a screen power supply are replaced, the multimedia host needs to be subjected to adaptive replacement, and when severe, hardware replacement of the multimedia host is caused, so that development workload and time cost are high.

Disclosure of Invention

The invention provides a vehicle-mounted multimedia system and a screen initialization method thereof, which are used for solving the problems of large adapting and replacing workload and high cost when screen components of a display screen of an existing multimedia host are replaced.

The invention provides a vehicle-mounted multimedia system, which comprises a multimedia host, a display screen and an LVDS transmission cable;

the multimedia host comprises a host controller and an LVDS serializer, wherein the host controller is connected with the LVDS serializer;

the display screen comprises a screen controller, an LVDS deserializer and a liquid crystal screen; the screen controller is connected with the LVDS deserializer and the liquid crystal screen; the LVDS deserializer is connected with the liquid crystal screen;

The LVDS transmission cable is connected with the LVDS serializer and the LVDS deserializer, and an I2C channel is arranged in the LVDS transmission cable;

and the host controller is used for reading the current screen version information corresponding to the display screen through the I2C channel, and completing initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information.

Preferably, the multimedia host further comprises a first I2C bus, a first video bus, a first LVDS bus, and a host connector; the first I2C bus is used for connecting the host controller and the LVDS serializer; the first video bus is used for connecting the host controller and the LVDS serializer; the first LVDS bus is used for connecting the LVDS serializer and the host connector, the host connector is connected with the LVDS transmission cable, and an I2C channel is arranged in the first LVDS bus;

the display screen also comprises a second I2C bus, a second video bus, a second LVDS bus and a screen plug connector; the second I2C bus is used for connecting the screen controller and the LVDS deserializer; the second video bus is used for connecting the LVDS deserializer and the liquid crystal screen; the second LVDS bus is used for connecting the LVDS deserializer and the screen plug connector, the screen plug connector is connected with the LVDS transmission cable, and an I2C channel is arranged in the second LVDS bus.

Preferably, the liquid crystal screen comprises a screen and a touch sensing module connected with the screen, and the touch sensing module is connected with the screen controller through a third I2C bus.

Preferably, the completing the initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information includes:

based on the current screen version information and the pre-stored screen version information, a version verification result is obtained;

if the version verification result is that verification is passed, determining display screen configuration information based on pre-stored screen detail information corresponding to the pre-stored screen version information, and completing display screen initialization configuration based on the display screen configuration information;

if the version verification result is that the verification is not passed, reading the detail information of the current screen corresponding to the display screen through the I2C channel, determining display screen configuration information based on the detail information of the current screen, and completing display screen initialization configuration based on the display screen configuration information.

Preferably, the current screen version information includes at least one current part version information; the pre-stored screen version information comprises at least one pre-stored part version information;

the obtaining a version verification result based on the current screen version information and the pre-stored screen version information comprises the following steps:

Comparing at least one piece of current part version information with at least one piece of pre-stored part version information to obtain at least one part verification result;

if all the part verification results are verification passing, obtaining a version verification result of verification passing;

if at least one part verification result is that verification is not passed, determining that the screen part is replaced currently, and obtaining a version verification result according to the screen part replaced currently.

Preferably, the obtaining a version verification result according to the screen end attribute corresponding to the currently replaced screen part includes:

acquiring a screen end attribute corresponding to a current screen replacement part according to the current screen replacement part;

if the screen end attribute corresponding to the current screen replacement part is the adaptation related attribute, acquiring a version verification result which is not passed by verification;

and if the screen end attribute corresponding to the current screen replacement part is the adapting irrelevant attribute, acquiring a version verification result which does not pass the verification.

The invention provides a screen initialization method of a vehicle-mounted multimedia system, which is applied to the vehicle-mounted multimedia system and comprises the following steps executed by a host controller:

forming a version reading instruction when the system is electrified, and sending the version reading instruction to a screen controller through an I2C channel built in the LVDS transmission cable;

Receiving current screen version information returned by the screen controller through an I2C channel built in the LVDS transmission cable;

and finishing initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information.

Preferably, the obtaining a version verification result according to the current replacement screen part includes:

According to the vehicle-mounted multimedia system and the screen initialization method thereof, the host controller can read the current screen version information of the display screen through the I2C channel so as to complete the initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information, so that video signals output by the multimedia host can be automatically adapted to video signals received by the display screen, and normal display of the display screen is ensured. The host controller needs to read the current screen version information in each initialization process, and then performs display screen initialization configuration based on the current screen version information and the pre-stored screen version information, so that decoupling of the multimedia host and the display screen can be realized, and compatibility adaptability of the multimedia host and the display screen is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an on-board multimedia system according to an embodiment of the invention;

FIG. 2 is another schematic diagram of an on-board multimedia system according to an embodiment of the invention;

FIG. 3 is a flowchart of a screen initialization method of an on-board multimedia system according to an embodiment of the present invention;

FIG. 4 is another flow chart of a screen initialization method of an in-vehicle multimedia system according to an embodiment of the invention;

FIG. 5 is another flowchart of a screen initialization method of an in-vehicle multimedia system according to an embodiment of the present invention;

fig. 6 is another flowchart of a screen initialization method of an in-vehicle multimedia system according to an embodiment of the present invention.

10. A multimedia host; 11. a host controller; 12. LVDS serializer; 13. a first I2C bus; 14. a first video bus; 15. a first LVDS bus; 16. a host connector; 20. a display screen; 21. a screen controller; 22. LVDS deserializer; 23. a liquid crystal panel; 231. the touch sensing module; 24. a second I2C bus; 25. a second video bus; 26. a second LVDS bus; 27. a screen plug; 28. a backlight driver; 29. a third I2C bus; 30. LVDS transmission cables.

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 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 understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the dimensions and relative dimensions of layers and regions may be exaggerated for the same elements throughout for clarity.

It will be understood that when an element or layer is referred to as being "on" …, "" adjacent to "…," "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected to or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on" …, "" directly adjacent to "…," "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.

Spatially relative terms, such as "under …," "under …," "below," "under …," "above …," "above," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under …" and "under …" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.

In the following description, for the purpose of providing a thorough understanding of the present invention, detailed structures and steps are presented in order to illustrate the technical solution presented by the present invention. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.

The embodiment of the invention provides a vehicle-mounted multimedia system, as shown in fig. 1, the vehicle-mounted multimedia system comprises a multimedia host 10, a display screen 20 and an LVDS transmission cable 30;

the multimedia host 10 comprises a host controller 11 and an LVDS serializer 12, wherein the host controller 11 is connected with the LVDS serializer 12;

the display screen 20 includes a screen controller 21, an LVDS deserializer 22, and a liquid crystal screen 23; the screen controller 21 is connected with the LVDS deserializer 22 and the liquid crystal screen 23; the LVDS deserializer 22 is connected with the liquid crystal screen 23;

the LVDS transmission cable 30 is connected with the LVDS serializer 12 and the LVDS deserializer 22, and an I2C channel is built in the LVDS transmission cable 30;

the host controller 11 is configured to read, through the I2C channel, the current screen version information corresponding to the display screen 20, and complete initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information.

The Low voltage differential signal LVDS (Low-Voltage Differential Signaling) is a differential signal technology with Low power consumption, low bit error rate, low crosstalk and Low radiation, the transmission technology can reach more than 155Mbps, and the core of the LVDS technology is to adopt extremely Low voltage swing high-speed differential transmission data, so that point-to-point or point-to-multipoint connection can be realized. In this example, the LVDS transmission cable 30 is a cable for realizing LVDS signal transmission.

The serializer/deserializer is an interface circuit in high-speed data communication, plays an important role in optical fiber data transmission and short-distance chip interconnection, and can effectively reduce pin count and trace count (trace count), improve communication data rate, and further increase utilization of existing resources (such as improving data throughput of a large amount of optical fiber infrastructure). In this example, the LVDS serializer 12 and the LVDS deserializer 22 are serializers and deserializers based on the LVDS technology, and are provided on the multimedia host 10 and the display 20, respectively. It is understood that the LVDS serializer 12 provided in the multimedia host 10 is used in combination with the LVDS deserializer 22 provided in the display 20 to secure transmission of LVDS signals.

The host controller 11 is a controller provided on the multimedia host 10, and may be an SOC or an MCU. The screen controller 21 is a controller provided on the display screen 20, and may be an MCU.

The current screen version information is version information reflected in real time by a display screen 20 connected to the multimedia host computer 10. The pre-stored screen version information is version information of the display screen 20 stored in advance by the multimedia host computer 10. In general, the multimedia host computer 10 saves version information of the display screen 20 connected last before the current time of the system as pre-stored screen version information.

As an example, the vehicle-mounted multimedia system includes a multimedia host 10 and a display screen 20 which are separately disposed, and further includes an LVDS transmission cable 30 for electrically connecting the multimedia host 10 and the display screen 20, wherein an LVDS serializer 12 is disposed in the multimedia host 10, and an LVDS deserializer 22 is disposed in the display screen 20, and when the multimedia host 10 controls the display screen 20 to display video, the processing procedure includes: (1) The host controller 11 needs to transmit the video signal to the LVDS serializer 12. (2) The LVDS serializer 12 receives the video signal, converts the video signal into an LVDS signal, and transmits the LVDS signal to the LVDS deserializer 22 through the LVDS transmission cable 30. (3) After receiving the LVDS signal, the LVDS deserializer 22 restores the LVDS signal to a video signal, and then sends the video signal to the liquid crystal display 23. (4) the liquid crystal screen 23 receives the video signal and controls the display of the video. In this example, an I2C channel is built in the LVDS transmission cable 30, and an I2C signal can be transmitted through the I2C channel to implement signal interaction between the multimedia host 10 and the display screen 20, and when the multimedia host 10 needs to control the display screen 20 to perform a read-write control operation, a read-write control signal can be transmitted through the I2C channel built in the LVDS transmission cable 30 to implement a basic function of signal interaction with the display screen 20.

In a conventional vehicle-mounted multimedia system, when a multimedia host 10 controls a display screen 20 to be initialized, the multimedia host 10 needs to complete initialization configuration of information such as a display screen time sequence and a deserializer register according to pre-stored screen version information, and when the display screen 20 is replaced by a liquid crystal screen 23 or other screen parts, different display screen time sequences can be caused, so that video signals output by the multimedia host 10 cannot be automatically adapted to video signals received by the display screen 20, and the multimedia host 10 cannot lighten the screen of the display screen 20, or abnormal phenomena such as screen blacking and screen flashing occur.

In order to overcome the above-mentioned shortcomings in the initialization process of the vehicle-mounted multimedia system, in this solution, in the initialization process of the display screen 20, the host controller 11 may first transmit a version reading instruction through the I2C channel built in the LVDS transmission cable 30 to read the current screen version information fed back by the screen controller 21; then, the host controller 11 may compare and match the current screen version information with the pre-stored screen version information, and determine whether to initialize according to the current screen version information or the pre-stored screen version information according to the comparison and matching result. For example, when the current screen version information is consistent with the pre-stored screen version information, the host controller 11 may complete initialization of the display screen 20 based on the pre-stored screen version information; when the current screen version information is inconsistent with the pre-stored screen version information, the host controller 11 needs to complete initialization configuration of information such as display screen time sequence and a deserializer register based on the current screen version information, so that a video signal output by the multimedia host 10 can be automatically adapted to a video signal received by the display screen 20, and normal display of the display screen 20 is ensured.

Understandably, since the host controller 11 performs the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, when the screen, the touch sensing module 231 or other screen parts in the display screen 20 are replaced, the current screen version information of the display screen 20 and the current screen detail information thereof need to be updated to the screen memory. In the initialization process of the display screen 20, the screen controller 21 may receive a version reading instruction transmitted by the host controller 11 through the I2C channel, and read the current screen version information from the screen memory based on the version reading instruction, so as to feed back the current screen version information to the host controller 11 through the I2C channel, so that the host controller 11 may complete the initialization configuration according to the received current screen version information and the pre-stored screen version information. Therefore, when the screen parts of the display screen 20 are replaced, only the related hardware and software systems of the display screen 20 are required to be modified, and the hardware and software systems of the multimedia host 10 are not required to be modified, so that decoupling of the multimedia host 10 and the display screen 20 is realized, and compatibility adaptability of the multimedia host 10 and the display screen 20 is improved.

In the vehicle-mounted multimedia system provided in this embodiment, the host controller 11 may read the current screen version information of the display screen 20 through the I2C channel, so as to complete the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, so that the video signal output by the multimedia host 10 may be automatically adapted to the video signal received by the display screen 20, thereby ensuring the normal display of the display screen 20. Because the host controller 11 needs to read the current screen version information in each initialization process, and then performs the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, the decoupling of the multimedia host 10 and the display screen 20 can be realized, and the compatibility adaptability of the multimedia host 10 and the display screen 20 is improved.

In one embodiment, as shown in fig. 2, the multimedia host 10 further includes a first I2C bus 13, a first video bus 14, a first LVDS bus 15, and a host connector 16; the first I2C bus 13 is used for connecting the host controller 11 and the LVDS serializer 12; the first video bus 14 is used for connecting the host controller 11 and the LVDS serializer 12; the first LVDS bus 15 is used for connecting the LVDS serializer 12 and the host connector 16, the host connector 16 is connected with the LVDS transmission cable 30, and an I2C channel is built in the first LVDS bus 15;

the display screen 20 further includes a second I2C bus 24, a second video bus 25, a second LVDS bus 26, and a screen plug 27; the second I2C bus 24 is used for connecting the screen controller 21 and the LVDS deserializer 22; the second video bus 25 is used for connecting the LVDS deserializer 22 and the liquid crystal screen 23; the second LVDS bus 26 is used for connecting the LVDS deserializer 22 and the screen connector 27, the screen connector 27 is connected with the LVDS transmission cable 30, and the second LVDS bus 26 is internally provided with an I2C channel.

The first I2C bus 13 is a bus for transmitting I2C signals, which is provided on the multimedia host computer 10. The first video bus 14 is a bus for transmitting video signals provided on the multimedia host computer 10. The first LVDS bus 15 is a bus provided on the multimedia host 10 for transmitting LVDS signals. The host connector 16 is an interface provided on the multimedia host 10 for connecting the LVDS transmission cable 30.

The second I2C bus 24 is a bus for transmitting I2C signals, which is provided on the display 20. The second video bus 25 is a bus for transmitting video signals provided on the display screen 20. The second LVDS bus 26 is a bus for transmitting LVDS signals provided on the display screen 20. The screen plug 27 is an interface provided on the display screen 20 for connecting the LVDS transmission cable 30.

As an example, the vehicle multimedia system is formed with a video signal transmission path, which in turn includes a host controller 11-a first video bus 14-an LVDS serializer 12-a first LVDS bus 15-a host connector 16-an LVDS transmission cable 30-a screen connector 27-a second LVDS bus 26-an LVDS deserializer 22-a second video bus 25-a liquid crystal screen 23. The multimedia host 10 can control the display screen 20 to display video through the video signal transmission path, and the processing procedure comprises: (1) The host controller 11 transmits the video signal to the LVDS serializer 12 through the first video bus 14. (2) The LVDS serializer 12 receives the video signal, converts the video signal into an LVDS signal, transmits the LVDS signal to the access host connector 16 through the first LVDS bus 15, transmits the LVDS signal to the screen connector 27 through the LVDS transmission cable 30, and transmits the LVDS signal to the LVDS deserializer 22 through the second LVDS bus 26 through the screen connector 27. (3) The LVDS deserializer 22 receives the LVDS signal, restores the LVDS signal to a video signal, and sends the video signal to the liquid crystal display 23 through the first video bus 14. (4) the liquid crystal screen 23 receives the video signal and controls the display of the video. In this example, the host controller 11 needs to read the current screen version information every time in the initialization process, so as to complete the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, and the video signal output by the first video bus 14 can be automatically adapted to the video signal received by the second video bus 25, so as to ensure the normal display of the display screen 20.

As an example, the vehicle multimedia system is formed with an I2C signal transmission path, and the I2C signal transmission path sequentially includes a host controller 11-a first I2C bus 13-an LVDS serializer 12-an I2C channel-host connector 16 built in a first LVDS bus 15-an I2C channel-screen connector 27 built in an LVDS transmission cable 30-an I2C channel-LVDS deserializer 22 built in a second LVDS bus 26-a second I2C bus 24-a screen controller 21. When the multimedia host 10 and the display screen 20 perform read-write operation, the processing procedure includes: (1) The host controller 11 forms an I2C control signal and sends the I2C control signal to the LVDS serializer 12 via the first I2C bus 13. (2) The LVDS serializer 12 receives the I2C control signal, transmits the I2C control signal to the host connector 16 through the I2C channel built in the first LVDS bus 15, transmits the I2C control signal to the screen connector 27 through the I2C channel built in the LVDS transmission cable 30, and transmits the I2C control signal to the LVDS deserializer 22 through the I2C channel built in the second LVDS bus 26 through the screen connector 27. (3) The LVDS deserializer 22 receives the I2C control signal and sends the I2C control signal to the screen controller 21 via the second I2C bus 24. (4) The screen controller 21 receives the I2C control signal, completes related control operations based on the I2C control signal, forms an I2C feedback signal, and then feeds back the I2C feedback signal to the host controller 11 through the I2C signal transmission path, so as to realize signal interaction between the host controller 11 and the screen controller 21. In this example, the host controller 11 can obtain the current screen version information through the I2C signal transmission path every time the initialization process of the display screen 20 is controlled, and then perform the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, so as to ensure the normal display of the display screen 20.

In one embodiment, as shown in fig. 2, the liquid crystal screen 23 includes a screen and a touch sensing module 231 connected to the screen, and the touch sensing module 231 is connected to the screen controller 21 through a third I2C bus 29.

As an example, the liquid crystal screen 23 includes a screen and a touch sensing module 231 connected to the screen, and the touch sensing module 231 is connected to the screen controller 21 through a third I2C bus 29, so that the screen controller 21 can implement a read-write control operation on the touch sensing module 231. Because the host controller 11 can be connected with the screen controller 21 through the I2C signal transmission path, and the screen controller 21 is connected with the touch sensing module 231 through the touch sensing module 231, the touch sensing module 231 of the host controller 11 is indirectly connected, so as to realize the read-write control operation of the host controller 11 on the touch sensing module 231.

In one embodiment, as shown in FIG. 2, the display screen 20 further includes a backlight driver 28, the backlight driver 28 being coupled to the screen controller 21 and the liquid crystal screen 23.

As an example, the display screen 20 further includes a backlight driver 28, and the backlight driver 28 is connected to the screen controller 21 and the liquid crystal screen 23, and can drive the backlight display of the liquid crystal screen 23 under the control of the screen controller 21.

In an embodiment, completing initialization configuration of a display screen based on current screen version information and pre-stored screen version information includes:

if the version verification result is that verification is passed, determining display screen configuration information based on pre-stored screen detail information corresponding to pre-stored screen version information, and completing display screen initialization configuration based on the display screen configuration information;

if the version verification result is that the verification is not passed, reading the detail information of the current screen corresponding to the display screen through the I2C channel, determining the configuration information of the display screen based on the detail information of the current screen, and completing the initialization configuration of the display screen based on the configuration information of the display screen.

As an example, after receiving the current screen version information and reading the pre-stored screen version information, the host controller 11 invokes a pre-configured version verification program to perform version verification on the current screen version information and the pre-stored screen version information, and obtains a version verification result, where the version verification result is a verification result for reflecting whether the pre-stored screen version information matches the current screen version information.

As an example, when the version verification result of the current screen version information and the pre-stored screen version information is that verification is passed, the host controller 11 determines that the currently connected display screen 20 is matched with the display screen configuration information pre-stored in the system, and no abnormal phenomena such as a screen incapable of being lightened or a screen with a screen turned on or a screen turned off will occur, so that the host controller 11 can read pre-stored screen detail information corresponding to the pre-stored screen version information, determine the display screen configuration information based on the pre-stored screen detail information, and configure the display screen 20 based on the display screen 20 to initialize configuration. For example, the host controller 11 may determine the display configuration information based on the pre-stored display timing sequence stored in the host memory and the pre-stored screen details such as the deserializer register, and then complete the initialization configuration of the display 20 based on the display configuration information, so as to ensure the normal display of the display 20.

As an example, when the version verification result of the current screen version information and the version verification result of the pre-stored screen version information are that the verification is failed, it is determined that the currently connected display screen 20 is not matched with the display screen configuration information pre-stored in the system, and abnormal phenomena such as a screen incapable of being lightened or a screen with a black screen is likely to occur, so that the host controller 11 needs to form a detail reading instruction, send the detail reading instruction to the screen controller 21 through an I2C channel built in the LVDS transmission cable 30, so as to receive the current screen detail information corresponding to the display screen 20 returned by the screen controller 21, determine the display screen configuration information based on the current screen detail information, and configure the display screen 20 based on the display screen 20 to initialize configuration. For example, the host controller 11 may determine display configuration information based on the received display timing and current screen details such as the deserializer register, and complete the initialization configuration of the display 20 based on the display configuration information to ensure the normal display of the display 20.

In this example, the host controller 11 first reads the current screen version information, and performs version verification by using the current screen version information and the pre-stored screen version information, so that the amount of data transmitted and processed in the process is small, which can help to ensure the screen initialization efficiency.

In one embodiment, the current screen version information includes at least one current part version information; the pre-stored screen version information comprises at least one pre-stored part version information;

based on the current screen version information and the pre-stored screen version information, obtaining a version verification result comprises the following steps:

comparing the at least one current part version information with at least one pre-stored part version information to obtain at least one part verification result;

if at least one part verification result is that the verification is not passed, determining that the screen part is replaced currently, and obtaining a version verification result according to the screen part replacement currently.

Wherein the current part version information is version information for uniquely identifying a specific screen part employed in the display screen 20. For example, the current part version information includes version information of a liquid crystal screen 23, an LVDS deserializer 22, or other screen parts in the display screen 20. The pre-stored part version information is version information of a specific screen part stored in advance by the multimedia host computer 10. For example, the pre-stored part version information includes version information of the liquid crystal screen 23, the LVDS deserializer 22, or other screen parts stored in advance by the multimedia host 10. The screen part is replaced currently when the system is powered on, and the screen part which is replaced when the system is powered on is detected, namely the screen part which is replaced when the pre-stored screen version information is stored relative to the system.

As an example, the current screen version information received by the host controller 11 includes at least one current part version information, and the pre-stored screen version information includes at least one pre-stored part version information, at this time, the host controller 11 may compare the current part version information and the pre-stored part version information corresponding to the same screen part one by one to obtain a part verification result of each screen part, where the part verification result includes both a verification pass and a verification fail. For example, the current display screen time sequence information corresponding to the display screen 20 can be compared with the pre-stored display screen time sequence information, and if the two information are consistent, a display screen time sequence verification result passing the verification is obtained; if the two are inconsistent, a display screen time sequence verification result which is not verified is obtained. For another example, the current deserializer register information corresponding to the LVDS deserializer 22 may be compared with the pre-stored deserializer register information, and if the two are consistent, a checking result of the deserializer register passing the checking is obtained; if the two are inconsistent, a deserializer register check result which is not checked is obtained.

As an example, the host controller 11 compares all the current part version information with the pre-stored part version information corresponding to the current part version information one by one to obtain at least one part verification result, and when all the part verification results are verification passing, the host controller indicates that the current screen version information corresponding to the display screen 20 which is currently connected is matched with the pre-stored screen version information pre-stored by the system, that is, no screen part replacement exists, so that the verification result of the version passing the verification can be directly obtained. Generally, the pre-stored screen version information is the version information of the display screen 20 connected last time before the current time of the system, if all the part verification results are verification passing, it is indicated that the display screen 20 connected currently is the same as the display screen 20 connected last time of the system, no screen part replacement exists, and the verification passing version verification result can be directly obtained.

As an example, the host controller 11 compares all the current part version information with the corresponding pre-stored part version information one by one to obtain at least one part verification result, when at least one part verification result is that the verification fails, the current screen version information corresponding to the currently connected display screen 20 is indicated to be incompletely matched with the pre-stored screen version information pre-stored in the system, and the screen part is replaced, at this time, the current screen replacement part is required to be determined according to the part verification result as the current part version information that fails, and the host controller 11 is required to obtain the version verification result according to whether the current screen replacement part affects the compatibility between the multimedia host 10 and the display screen 20. Understandably, if the current replacement of the screen part affects the compatible adaptation between the multimedia host 10 and the display screen 20, a version verification result that the verification is not passed is obtained; if the current replacement of the screen parts does not affect the compatibility between the multimedia host 10 and the display screen 20, a version verification result passing the verification is obtained, so that the display screen configuration information is determined in different modes according to the version verification result, and the display screen 20 initialization configuration is completed based on the display screen configuration information.

In an embodiment, obtaining a version verification result according to a screen end attribute corresponding to a currently replaced screen part includes:

acquiring screen end attributes corresponding to the screen part to be replaced according to the current screen part to be replaced;

and if the screen end attribute corresponding to the current screen replacement part is the adapting irrelevant attribute, acquiring a version verification result passing verification.

The screen end attribute is an attribute for reflecting whether the screen part replacement affects the compatible adaptation between the multimedia host 10 and the display 20.

As an example, after determining the currently replaced screen part according to the part verification result that the verification is not passed, the host controller 11 needs to determine the screen end attribute corresponding to the currently replaced screen part, where the screen end attribute is an attribute determined according to whether the replacement of the currently replaced screen part will affect the compatible adaptation between the multimedia host 10 and the display screen 20, and includes two adaptation related attributes and adaptation unrelated attributes, so as to determine whether re-adaptation is required according to the two screen end attributes, that is, the adaptation related attributes and the adaptation unrelated attributes, so as to obtain the corresponding version verification result.

For example, when the screen component is currently replaced by a screen of the lcd 23, the material characteristics and the IC characteristics of the screen of each lcd 23 are different, which results in different timing of the display, and thus, the screen end attribute is an adaptation related attribute.

For example, when the screen component is currently replaced by the touch sensing module 231 of the liquid crystal screen 23, since the touch sensing module 231 can be controlled by the screen controller 21 autonomously, its replacement will not affect the adaptation of the display screen 20 to the multimedia host 10, and therefore its screen end attribute is an adaptation irrelevant attribute.

For example, when the current screen part is the LVDS deserializer 22, the LVDS deserializer 22 also causes different display timing, and cannot be adapted to the multimedia host 10, so the screen end attribute is an adaptation related attribute.

For example, when the screen component is replaced currently as a screen power source, that is, when the power source is built in the display screen 20, since the management control of the screen power source can be controlled autonomously by the screen controller 21, the replacement thereof will not affect the adaptation of the display screen 20 to the multimedia host 10, and therefore, the screen end attribute thereof is an adaptation irrelevant attribute.

For example, when the currently replaced screen part is the backlight driver 28, since the backlight driver 28 can be autonomously controlled by the screen controller 21, its replacement does not affect the adaptation of the display screen 20 to the multimedia host 10, and therefore its screen end attribute is an adaptation independent attribute.

As an example, when it is determined that there is at least one screen end attribute corresponding to the currently replaced screen part as the adaptation related attribute, that is, there is at least one currently replaced screen part affecting the compatible adaptation between the multimedia host 10 and the display screen 20, the host controller 11 may acquire a version verification result that is not passed by the verification, so that the current screen detail information corresponding to the display screen 20 may be read through the I2C channel later, determine the display screen configuration information based on the current screen detail information, and complete the initialization configuration of the display screen 20 based on the display screen configuration information, thereby ensuring the compatible adaptation between the multimedia host 10 and the display screen 20.

As an example, when it is determined that the screen end attribute corresponding to all the currently replaced screen parts is the adapting irrelevant attribute, that is, when there is no currently replaced screen part affecting the compatible adaptation between the multimedia host 10 and the display screen 20, the host controller 11 obtains the verification result of the version passing the verification, so as to determine the configuration information of the display screen based on the pre-stored screen detail information corresponding to the pre-stored screen version information, and complete the initialization configuration of the display screen 20 based on the configuration information of the display screen, thereby not only ensuring the compatible adaptation between the multimedia host 10 and the display screen 20, but also ensuring the processing efficiency of the initialization process.

The embodiment of the present invention provides a method for initializing a screen of a vehicle-mounted multimedia system, which is applied to the vehicle-mounted multimedia system of the above embodiment, as shown in fig. 3, and includes the following steps executed by the host controller 11:

s301: forming a version reading instruction when the system is powered on, and sending the version reading instruction to the screen controller through an I2C channel built in the LVDS transmission cable;

s302: receiving the current screen version information returned by the screen controller through an I2C channel built in the LVDS transmission cable;

s303: and finishing initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information.

The version reading instruction is an instruction for reading version information of the display screen 20, specifically, an instruction for reading version information of a screen part in the display screen 20 connected to the multimedia host computer 10.

As an example, in step S301, the host controller 11 forms a version reading command when the system is powered on, and then sends the version reading command to the screen controller 21 through the I2C channel built in the LVDS transmission cable 30. For example, the host controller 11 may form a version read instruction, which is an I2C signal, and may send the version read instruction to the screen controller 21 through an I2C signal transmission path, where the I2C signal transmission path specifically includes: the host controller 11-the first I2C bus 13-the LVDS serializer 12-the I2C channel-host connector 16-the I2C channel-screen connector 27-the I2C channel-LVDS deserializer 22-the second I2C bus 24-the screen controller 21-the first LVDS bus 15-the I2C channel-screen connector 27-the second LVDS bus 26-the first LVDS bus 15.

As an example, in step S302, after the host controller 11 sends the version reading instruction to the screen controller 21 through the I2C channel built in the LVDS transmission cable 30, the host controller may receive the current screen version information returned by the screen controller 21 through the I2C channel built in the LVDS transmission cable 30, where the current screen version information is the version information of the currently connected display screen 20. In this example, the current screen version information includes, but is not limited to, display timing and deserializer registers corresponding to the display 20.

As an example, in step S303, after receiving the current screen version information fed back by the screen controller 21, the host controller 11 may compare and match the current screen version information with the pre-stored screen version information stored in the host memory in advance, and determine whether to initialize according to the current screen version information or the pre-stored screen version information according to the comparison and matching result. For example, when the current screen version information is consistent with the pre-stored screen version information, the host controller 11 may complete initialization of the display screen 20 based on the pre-stored screen version information; when the current screen version information is inconsistent with the pre-stored screen version information, the host controller 11 needs to complete initialization configuration of information such as display screen time sequence and a deserializer register based on the current screen version information, so that a video signal output by the multimedia host 10 can be automatically adapted to a video signal received by the display screen 20, and normal display of the display screen 20 is ensured.

Understandably, since the host controller 11 performs the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, only the current screen version information of the display screen 20 and the current screen detail information thereof need to be updated to the screen memory when the screen, the touch sensing module 231 or other screen parts in the display screen 20 are replaced. In the initialization process of the display screen 20, the screen controller 21 may receive a version reading instruction transmitted by the host controller 11 through the I2C channel, and read the current screen version information from the screen memory based on the version reading instruction, so as to feed back the current screen version information to the host controller 11 through the I2C channel, so that the host controller 11 may complete the initialization configuration according to the received current screen version information and the pre-stored screen version information. Therefore, when the screen parts of the display screen 20 are replaced, only the related hardware and software systems of the display screen 20 are required to be modified, and the hardware and software systems of the multimedia host 10 are not required to be modified, so that decoupling of the multimedia host 10 and the display screen 20 is realized, and compatibility adaptability of the multimedia host 10 and the display screen 20 is improved.

In the screen initialization method of the vehicle-mounted multimedia system provided in this embodiment, the host controller 11 may read the current screen version information of the display screen 20 through the I2C channel, so as to complete the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, so that the video signal output by the multimedia host 10 may be automatically adapted to the video signal received by the display screen 20, thereby ensuring the normal display of the display screen 20. Because the host controller 11 needs to read the current screen version information in each initialization process, and then performs the initialization configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, the decoupling of the multimedia host 10 and the display screen 20 can be realized, and the compatibility adaptability of the multimedia host 10 and the display screen 20 is improved.

In one embodiment, as shown in fig. 4, step S303, namely completing initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information, includes:

s501: based on the current screen version information and the pre-stored screen version information, a version verification result is obtained;

s502: if the version verification result is that verification is passed, determining display screen configuration information based on pre-stored screen detail information corresponding to pre-stored screen version information, and completing display screen initialization configuration based on the display screen configuration information;

s503: if the version verification result is that the verification is not passed, reading the detail information of the current screen corresponding to the display screen through the I2C channel, determining the configuration information of the display screen based on the detail information of the current screen, and completing the initialization configuration of the display screen based on the configuration information of the display screen.

As an example, in step S501, after receiving the current screen version information and reading the pre-stored screen version information, the host controller 11 invokes a pre-configured version verification program to perform version verification on the current screen version information and the pre-stored screen version information, and obtains a version verification result, where the version verification result is a verification result for reflecting whether the pre-stored screen version information matches the current screen version information.

As an example, in step S502, when the version verification result of the current screen version information and the pre-stored screen version information is that the verification is passed, the host controller 11 determines that the currently connected display screen 20 is matched with the display screen configuration information pre-stored in the system, and no abnormal phenomena such as a screen incapable of being lightened or a screen having a black screen is generated, so that the host controller 11 can read pre-stored screen detail information corresponding to the pre-stored screen version information, determine the display screen configuration information based on the pre-stored screen detail information, and configure the display screen 20 based on the display screen 20 to initialize configuration. For example, the host controller 11 may determine the display configuration information based on the pre-stored display timing sequence stored in the host memory and the pre-stored screen details such as the deserializer register, and then complete the initialization configuration of the display 20 based on the display configuration information, so as to ensure the normal display of the display 20.

As an example, in step S503, when the verification result of the current screen version information and the version verification result of the pre-stored screen version information is that the verification fails, it is determined that the currently connected display screen 20 is not matched with the display screen configuration information pre-stored in the system, and an abnormal phenomenon such as a screen incapable of being lightened or a screen flashing phenomenon of the display screen 20 may occur, so that the host controller 11 needs to form a detail reading instruction, send the detail reading instruction to the screen controller 21 through the I2C channel built in the LVDS transmission cable 30, so as to receive the current screen detail information corresponding to the display screen 20 returned by the screen controller 21, determine the display screen configuration information based on the current screen detail information, and configure the display screen 20 to initialize configuration based on the display screen 20. For example, the host controller 11 may determine display configuration information based on the received display timing and current screen details such as the deserializer register, and complete the initialization configuration of the display 20 based on the display configuration information to ensure the normal display of the display 20.

as shown in fig. 5, step S501, that is, based on the current screen version information and the pre-stored screen version information, obtains a version verification result, includes:

s501: comparing the at least one current part version information with at least one pre-stored part version information to obtain at least one part verification result;

s502: if all the part verification results are verification passing, obtaining a version verification result of verification passing;

s503: if at least one part verification result is that the verification is not passed, determining that the screen part is replaced currently, and obtaining a version verification result according to the screen part replacement currently.

Wherein the current part version information is version information for uniquely identifying a specific screen part employed in the display screen 20. For example, the current part version information includes version information of a liquid crystal screen 23, an LVDS deserializer 22, or other screen parts in the display screen 20.

Wherein the pre-stored part version information is version information of a specific screen part pre-stored by the multimedia host computer 10. For example, the pre-stored part version information includes version information of the liquid crystal screen 23, the LVDS deserializer 22, or other screen parts stored in advance by the multimedia host 10.

As an example, in step S501, the current screen version information received by the host controller 11 includes at least one current part version information, and the pre-stored screen version information includes at least one pre-stored part version information, at this time, the host controller 11 may compare the current part version information and the pre-stored part version information corresponding to the same screen part one by one, so as to obtain a part verification result of each screen part, where the part verification result includes a verification passing and a verification failing. For example, the current display screen time sequence information corresponding to the display screen 20 can be compared with the pre-stored display screen time sequence information, and if the two information are consistent, a display screen time sequence verification result passing the verification is obtained; if the two are inconsistent, a display screen time sequence verification result which is not verified is obtained. For another example, the current deserializer register information corresponding to the LVDS deserializer 22 may be compared with the pre-stored deserializer register information, and if the two are consistent, a checking result of the deserializer register passing the checking is obtained; if the two are inconsistent, a deserializer register check result which is not checked is obtained.

As an example, in step S502, the host controller 11 compares all the current part version information with the pre-stored part version information corresponding to the current part version information one by one to obtain at least one part verification result, and when all the part verification results are verification passing, the current screen version information corresponding to the display screen 20 connected currently is indicated to be matched with the pre-stored screen version information pre-stored in the system, that is, no screen part replacement exists, so that the verification result of the verification passing version can be directly obtained. Generally, the pre-stored screen version information is the version information of the display screen 20 connected last time before the current time of the system, if all the part verification results are verification passing, it is indicated that the display screen 20 connected currently is the same as the display screen 20 connected last time of the system, no screen part replacement exists, and the verification passing version verification result can be directly obtained.

The screen part is detected to be replaced when the system is powered on, namely the screen part which is replaced when the pre-stored screen version information is stored relative to the system.

As an example, in step S503, the host controller 11 compares all the current part version information with the corresponding pre-stored part version information one by one, obtains at least one part verification result, when at least one part verification result is that the verification fails, indicates that the current screen version information corresponding to the currently connected display screen 20 is not completely matched with the pre-stored screen version information pre-stored in the system, and there is screen part replacement, at this time, the current replacement screen part needs to be determined according to the part verification result as the current part version information that fails, and the host controller 11 needs to obtain the version verification result according to whether the current replacement screen part affects the compatibility between the multimedia host 10 and the display screen 20. Understandably, if the current replacement of the screen part affects the compatible adaptation between the multimedia host 10 and the display screen 20, a version verification result that the verification is not passed is obtained; if the current replacement of the screen parts does not affect the compatibility between the multimedia host 10 and the display screen 20, a version verification result passing the verification is obtained, so that the display screen configuration information is determined in different modes according to the version verification result, and the display screen 20 initialization configuration is completed based on the display screen configuration information.

In one embodiment, as shown in fig. 6, that is, according to the current replacement screen part, the obtaining the version verification result includes:

s601: acquiring screen end attributes corresponding to the screen part to be replaced according to the current screen part to be replaced;

s602: if the screen end attribute corresponding to the current screen replacement part is the adaptation related attribute, acquiring a version verification result which is not passed by verification;

s603: and if the screen end attribute corresponding to the current screen replacement part is the adapting irrelevant attribute, acquiring a version verification result passing verification.

As an example, in step S601, after determining the currently replaced screen part according to the part verification result that the verification is not passed, the host controller 11 needs to determine the screen end attribute corresponding to the currently replaced screen part, where the screen end attribute is an attribute determined according to whether the replacement of the currently replaced screen part will affect the compatible adaptation between the multimedia host 10 and the display screen 20, and includes two adaptation related attributes and adaptation unrelated attributes, so as to determine whether re-adaptation is required according to the two screen end attributes, that is, the adaptation related attribute and the adaptation unrelated attribute, so as to obtain the corresponding version verification result.

In this example, when the screen part is replaced currently with a screen of the lcd 23, the material characteristics and the IC characteristics of the screen of each lcd 23 are different, which may cause different timing of the display, and thus, the screen end attribute is an adaptation related attribute, which cannot be adapted to the multimedia host 10.

In this example, when the screen part is currently replaced by the touch sensing module 231 of the liquid crystal screen 23, the screen end attribute is an adaptation irrelevant attribute because the touch sensing module 231 can be controlled by the screen controller 21 autonomously and its replacement will not affect the adaptation of the display screen 20 to the multimedia host 10.

In this example, when the current screen part is replaced with the LVDS deserializer 22, the LVDS deserializer 22 also causes different display timing sequences, and cannot be adapted to the multimedia host 10, so that the screen end attribute is an adaptation related attribute.

In this example, when the current screen part is replaced by the screen power supply, that is, when the power supply built in the display screen 20, since the management control of the screen power supply can be controlled by the screen controller 21 autonomously, the replacement thereof will not affect the adaptation of the display screen 20 and the multimedia host 10, and therefore, the screen end attribute thereof is an adaptation irrelevant attribute.

In this example, when the current replacement screen part is the backlight driver 28, since the backlight driver 28 can be autonomously controlled by the screen controller 21, its replacement does not affect the adaptation of the display screen 20 to the multimedia host 10, and therefore its screen end attribute is an adaptation independent attribute.

As an example, in step S602, when it is determined that there is at least one screen end attribute corresponding to the current screen replacement part as the adaptation related attribute, that is, there is at least one current screen replacement part affecting the compatible adaptation between the multimedia host 10 and the display screen 20, the host controller 11 may obtain a version verification result that is not passed by the verification, so that the current screen detail information corresponding to the display screen 20 may be read through the I2C channel later, determine the display screen configuration information based on the current screen detail information, and complete the initialization configuration of the display screen 20 based on the display screen configuration information, thereby ensuring the compatible adaptation between the multimedia host 10 and the display screen 20.

As an example, in step S603, when it is determined that the screen end attributes corresponding to all the currently replaced screen parts are the adapting irrelevant attributes, that is, when there is no currently replaced screen part affecting the compatible adapting between the multimedia host 10 and the display screen 20, the host controller 11 obtains the verification result of the version passing the verification, so that the display screen configuration information can be determined based on the pre-stored screen detail information corresponding to the pre-stored screen version information, and the initialization configuration of the display screen 20 is completed based on the display screen configuration information, so that the compatible adapting between the multimedia host 10 and the display screen 20 can be ensured, and the processing efficiency of the initialization process can also be ensured.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.

Claims

1. The vehicle-mounted multimedia system is characterized by comprising a multimedia host, a display screen and an LVDS transmission cable;

the multimedia host also comprises a first I2C bus, a first video bus, a first LVDS bus and a host connector; the first I2C bus is used for connecting the host controller and the LVDS serializer and transmitting I2C signals; the first video bus is used for connecting the host controller and the LVDS serializer and transmitting video signals; the first LVDS bus is used for connecting the LVDS serializer and the host connector, the host connector is connected with the LVDS transmission cable, an I2C channel is arranged in the first LVDS bus, and the first LVDS bus is used for transmitting LVDS signals and I2C signals;

The display screen also comprises a second I2C bus, a second video bus, a second LVDS bus and a screen plug connector; the second I2C bus is used for connecting the screen controller and the LVDS deserializer and transmitting I2C signals; the second video bus is used for connecting the LVDS deserializer and the liquid crystal screen and transmitting video signals; the second LVDS bus is used for connecting the LVDS deserializer and the screen plug connector, the screen plug connector is connected with the LVDS transmission cable, an I2C channel is arranged in the second LVDS bus, and the second LVDS bus is used for transmitting LVDS signals and I2C signals;

2. The vehicle-mounted multimedia system of claim 1, wherein the liquid crystal screen comprises a screen and a touch sensing module connected with the screen, wherein the touch sensing module is connected with the screen controller through a third I2C bus.

3. The vehicle-mounted multimedia system according to any one of claims 1-2, wherein the completing the display screen initialization configuration based on the current screen version information and the pre-stored screen version information comprises:

4. The vehicle-mounted multimedia system of claim 3, wherein the current screen version information includes at least one current part version information; the pre-stored screen version information comprises at least one pre-stored part version information;

5. The vehicle-mounted multimedia system according to claim 4, wherein the obtaining the version verification result according to the screen end attribute corresponding to the currently replaced screen part comprises:

6. A method for initializing a screen of a vehicle-mounted multimedia system, which is applied to the vehicle-mounted multimedia system according to any one of claims 1 to 2, and comprises the following steps executed by a host controller:

7. The method for initializing a screen of an in-vehicle multimedia system according to claim 6, wherein the completing the initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information comprises:

8. The screen initialization method of an in-vehicle multimedia system according to claim 7, wherein the current screen version information includes at least one current part version information; the pre-stored screen version information comprises at least one pre-stored part version information;

9. The method for initializing a screen of an in-vehicle multimedia system according to claim 8, wherein the obtaining a version check result according to the current replacement screen part comprises: