CN115220679B - Vehicle-mounted multimedia system and screen initialization method - Google Patents

Abstract

The invention discloses a vehicle-mounted multimedia system and a screen initialization method thereof. The system includes a multimedia host, a display screen and an LVDS transmission cable; the multimedia host includes a host controller and an LVDS serializer, and the host controller is connected to the LVDS serializer; The display screen includes a screen controller, LVDS deserializer and LCD screen; the screen controller is connected to the LVDS deserializer and LCD screen; the LVDS deserializer is connected to the LCD screen; the LVDS transmission cable is connected to the LVDS serializer and LVDS deserializer The host controller is connected to the device, and the LVDS transmission cable has a built-in I2C channel; the host controller is used to read the current screen version information corresponding to the display screen through the I2C channel, and complete the initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information. This system can decouple the multimedia host and the display screen, improve the compatibility and adaptability of the multimedia host and the display screen, and ensure the normal display of the screen.

Description

Vehicle-mounted multimedia system and screen initialization method

Technical field

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

Background technique

With the popularity of the suspended shape of vehicle-mounted multimedia display screens, the shape of the display screen has become increasingly thinner and thinner, making the separation of the multimedia host and display screen of the vehicle-mounted multimedia system become mainstream. In existing vehicle-mounted multimedia systems, when the display screen is replaced, for example, when the screen, touch screen, screen power supply and other display parts are replaced, the multimedia host needs to be adapted and replaced. In severe cases, the multimedia host hardware may be replaced. This results in greater development workload and time costs.

Contents of the invention

The present invention provides a vehicle-mounted multimedia system and a screen initialization method thereof to solve the problem of large adaptation and replacement workload and cost when the screen components of the display screen of the existing multimedia host are replaced.

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

The multimedia host includes a host controller and an LVDS serializer, and the host controller is connected to the LVDS serializer;

The display screen includes a screen controller, an LVDS deserializer and a liquid crystal screen; the screen controller is connected to the LVDS deserializer and the liquid crystal screen; the LVDS deserializer is connected to the liquid crystal screen;

The LVDS transmission cable is connected to the LVDS serializer and the LVDS deserializer, and the LVDS transmission cable has a built-in I2C channel;

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

Preferably, the multimedia host further includes a first I2C bus, a first video bus, a first LVDS bus and a host connector; the first I2C bus is used to connect the host controller and the LVDS serializer; The first video bus is used to connect the host controller and the LVDS serializer; the first LVDS bus is used to connect the LVDS serializer and the host connector, and the host connector is The LVDS transmission cables are connected, and the first LVDS bus has a built-in I2C channel;

The display screen also includes a second I2C bus, a second video bus, a second LVDS bus and a screen connector; the second I2C bus is used to connect the screen controller and the LVDS deserializer; the The second video bus is used to connect the LVDS deserializer and the LCD screen; the second LVDS bus is used to connect the LVDS deserializer and the screen connector, and the screen connector is connected to the LCD screen. The LVDS transmission cable is connected, and the second LVDS bus has a built-in I2C channel.

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

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

Obtain the version verification result based on the current screen version information and the pre-stored screen version information;

If the version verification result is that the verification is passed, the display screen configuration information is determined based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and the display screen initialization configuration is completed based on the display screen configuration information;

If the version verification result is that the verification fails, the current screen detailed information corresponding to the display screen is read through the I2C channel, and the display screen configuration information is determined based on the current screen detailed information. The configuration information completes the display initialization configuration.

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

Obtaining the version verification result based on the current screen version information and pre-stored screen version information includes:

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

If the verification results of all the parts mentioned are that the verification is passed, the version verification result that passes the verification is obtained;

If at least one of the parts has a verification result that fails the verification, the current replacement screen part is determined, and the version verification result is obtained based on the current replacement screen part.

Preferably, obtaining the version verification result based on the screen terminal attributes corresponding to the current replacement screen parts includes:

According to the current replacement screen parts, obtain the screen end attributes corresponding to the current replacement screen parts;

If the screen side attributes corresponding to the current replacement screen parts are adaptation-related attributes, obtain the version verification results that fail the verification;

If the screen side attributes corresponding to the current replacement screen parts are adaptation-independent attributes, obtain the version verification results that fail the verification.

The present invention provides a screen initialization method for a vehicle-mounted multimedia system, which is applied to the above-mentioned vehicle-mounted multimedia system and includes the following steps executed by a host controller:

A version read command is formed when the system is powered on, and the version read command is sent to the screen controller through the built-in I2C channel of the LVDS transmission cable;

Receive the current screen version information returned by the screen controller through the built-in I2C channel of the LVDS transmission cable;

Based on the current screen version information and the pre-stored screen version information, the initialization configuration of the display screen is completed.

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

Obtain the version verification result based on the current screen version information and the pre-stored screen version information;

If the version verification result is that the verification is passed, the display screen configuration information is determined based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and the display screen initialization configuration is completed based on the display screen configuration information;

If the version verification result is that the verification fails, the current screen detailed information corresponding to the display screen is read through the I2C channel, and the display screen configuration information is determined based on the current screen detailed information. The configuration information completes the display initialization configuration.

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

Obtaining the version verification result based on the current screen version information and pre-stored screen version information includes:

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

If the verification results of all the parts mentioned are that the verification is passed, the version verification result that passes the verification is obtained;

If at least one of the parts has a verification result that fails the verification, the current replacement screen part is determined, and the version verification result is obtained based on the current replacement screen part.

Preferably, obtaining the version verification result based on the currently replaced screen parts includes:

According to the current replacement screen parts, obtain the screen end attributes corresponding to the current replacement screen parts;

If the screen side attributes corresponding to the current replacement screen parts are adaptation-related attributes, obtain the version verification results that fail the verification;

If the screen side attributes corresponding to the current replacement screen parts are adaptation-independent attributes, obtain the version verification results that fail the verification.

In the above-mentioned vehicle-mounted multimedia system and its screen initialization method, the host controller can read the current screen version information of the display screen through the I2C channel, so as to complete the display screen initialization configuration based on the current screen version information and the pre-stored screen version information, so that the video output by the multimedia host The signal can automatically adapt to the video signal received by the display screen, thereby ensuring the normal display of the display screen. Since the host controller needs to read the current screen version information during each initialization process, and then performs the display initialization configuration based on the current screen version information and the pre-stored screen version information, it can realize the decoupling of the multimedia host and the display screen, and improve the multimedia host and display screen compatibility.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative labor.

Figure 1 is a schematic diagram of a vehicle-mounted multimedia system in an embodiment of the present invention;

Figure 2 is another schematic diagram of a vehicle-mounted multimedia system in an embodiment of the present invention;

Figure 3 is a flow chart of a screen initialization method of a vehicle-mounted multimedia system in an embodiment of the present invention;

Figure 4 is another flow chart of a screen initialization method of a vehicle-mounted multimedia system in an embodiment of the present invention;

Figure 5 is another flow chart of a screen initialization method of a vehicle-mounted multimedia system in an embodiment of the present invention;

FIG. 6 is another flow chart of a screen initialization method of a vehicle-mounted multimedia system in an embodiment of the present invention.

10. Multimedia host; 11. Host controller; 12. LVDS serializer; 13. First I2C bus; 14. First video bus; 15. First LVDS bus; 16. Host connector; 20. Display screen; 21. Screen controller; 22. LVDS deserializer; 23. LCD screen; 231. Touch sensor module; 24. Second I2C bus; 25. Second video bus; 26. Second LVDS bus; 27. Screen plug Connector; 28. Backlight driver; 29. Third I2C bus; 30. LVDS transmission cable.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It will be understood that the invention may be embodied in different 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 size and relative sizes of layers and regions may be exaggerated for clarity, like reference numerals refer to the same elements throughout.

It will be understood that when an element or layer is referred to as being "on," "adjacent," "connected to" or "coupled to" another element or layer, it can be directly on, with, or coupled to the other element or layer. They may be adjacent, connected, or coupled to other elements or layers, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent," "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 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 invention.

Spatial relational terms such as "under", "under", "under", "under", "on", "above", etc. may be used here for convenience of description This describes the relationship of one element or feature to other elements or features 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, then elements or features described as "below" or "under" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "below" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial 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 dictates otherwise. It will also be understood that the terms "consisting of" and/or "comprising", when used in this specification, identify the presence of stated features, integers, steps, operations, elements and/or parts but do not exclude one or more others The presence or addition of features, integers, steps, operations, elements, parts, and/or groups. When used herein, the term "and/or" includes any and all combinations of the associated listed items.

In order to fully understand the present invention, detailed structures and steps will be provided in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other embodiments.

An embodiment of the present invention provides a vehicle-mounted multimedia system. As shown in Figure 1, the vehicle-mounted multimedia system includes a multimedia host 10, a display screen 20 and an LVDS transmission cable 30;

The multimedia host 10 includes a host controller 11 and an LVDS serializer 12, and the host controller 11 is connected to 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 to the LVDS deserializer 22 and the liquid crystal screen 23; the LVDS deserializer 22 is connected to the liquid crystal screen 23;

The LVDS transmission cable 30 is connected to the LVDS serializer 12 and the LVDS deserializer 22, and the LVDS transmission cable 30 has a built-in I2C channel;

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

Among them, LVDS (Low-Voltage Differential Signaling) is a differential signaling technology with low power consumption, low bit error rate, low crosstalk and low radiation. This transmission technology can reach more than 155Mbps, which is the core of LVDS technology. It uses extremely low voltage swing and high-speed differential transmission of data, and can realize point-to-point or point-to-multipoint connections. In this example, the LVDS transmission cable 30 is a cable used to realize LVDS signal transmission.

The serial/deserializer is an interface circuit in high-speed data communication. It plays an important role in optical fiber data transmission and short-distance chip interconnection. It can effectively reduce the number of pins and trace counts and increase the communication data rate. , thereby increasing the utilization of existing resources (such as improving the data throughput of a large number of optical fiber infrastructure). In this example, the LVDS serializer 12 and the LVDS deserializer 22 are serializers and deserializers based on LVDS technology, and are respectively provided on the multimedia host 10 and the display screen 20 . Understandably, the LVDS serializer 12 provided in the multimedia host 10 is paired with the LVDS deserializer 22 provided in the display screen 20 to ensure the transmission of LVDS signals.

Among them, the host controller 11 is a controller provided on the multimedia host 10, and may be a 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 the version information reflected in real time by the display screen 20 connected to the multimedia host 10 . The pre-stored screen version information is the version information of the display screen 20 stored in advance by the multimedia host 10 . Generally speaking, the multimedia host 10 saves the version information of the display screen 20 that was last connected 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 that are installed separately, and also includes an LVDS transmission cable 30 for electrically connecting the multimedia host 10 and the display screen 20 . An LVDS serial cable is provided in the multimedia host 10 12, and the display screen 20 is equipped with an LVDS deserializer 22. When the multimedia host 10 controls the display screen 20 to display video, the processing includes: (1) The host controller 11 needs to send 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 then 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 LCD screen 23 . (4) The LCD screen 23 receives the video signal and controls the video display. In this example, the LVDS transmission cable 30 has a built-in I2C channel, which can transmit I2C signals through the I2C channel to realize signal interaction between the multimedia host 10 and the display screen 20. The multimedia host 10 needs to control the display screen 20 for read and write control. During operation, the read and write control signals can be transmitted through the built-in I2C channel of the LVDS transmission cable 30 to realize the basic function of signal interaction with the display screen 20 .

In a traditional vehicle-mounted multimedia system, when the multimedia host 10 controls the initialization of the display screen 20, the multimedia host 10 needs to complete the initial configuration of the display timing sequence and deserializer register and other information based on the pre-stored screen version information, and replace the LCD screen 23 or other screens on the display screen 20. parts, it will cause the timing sequence of the display screen to be different, so that the video signal output by the multimedia host 10 cannot automatically adapt to the video signal received by the display screen 20, resulting in the multimedia host 10 being unable to light up the screen of the display screen 20, or anomalies such as a black screen and flashing screen occurring. Phenomenon.

In order to overcome the above-mentioned shortcomings in the initialization process of the vehicle-mounted multimedia system, in this solution, during the initialization process of the display screen 20 of the multimedia host 10, the host controller 11 can first read instructions through the built-in I2C channel transmission version of the LVDS transmission cable 30 to read Get the current screen version information fed back by the screen controller 21; then, the host controller 11 can compare and match the current screen version information with the pre-stored screen version information, and determine whether to rely on the current screen version information or the pre-stored screen version information based on the comparison and matching results. Perform initialization. For example, when the current screen version information is consistent with the pre-stored screen version information, the host controller 11 can complete the 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 be based on the pre-stored screen version information. The current screen version information completes the initial configuration of the display screen timing sequence, deserializer register and other information, so that the video signal output by the multimedia host 10 can automatically adapt to the video signal received by the display screen 20, thereby ensuring the normal display of the display screen 20.

Understandably, since the host controller 11 performs the initial configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, when the screen, touch sensing module 231 or other screen parts in the display screen 20 are replaced, the display needs to be updated. The current screen version information of screen 20 and its current screen detailed information and other information are stored in the screen memory. During the initialization process of the display screen 20 , the screen controller 21 can receive the version read 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 read instruction to save the current screen version information. Feedback is given to the host controller 11 through the I2C channel, so that the host controller 11 can complete the initialization configuration based on the received current screen version information and pre-stored screen version information. It can be seen from this that when the screen parts of the display screen 20 are replaced, only the relevant hardware and software systems of the display screen 20 need to be modified, and the hardware and software systems of the multimedia host 10 do not need to be modified, thereby achieving decoupling of the multimedia host 10 and the display screen 20 , to improve the compatibility and adaptability of the multimedia host 10 and the display screen 20 .

In the vehicle-mounted multimedia system provided by this embodiment, the host controller 11 can 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 multimedia The video signal output by the host 10 can automatically adapt to the video signal received by the display screen 20, thereby ensuring normal display of the display screen 20. Since the host controller 11 needs to read the current screen version information during each initialization process, and then performs the initial configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, the multimedia host 10 and the display screen 20 can be decoupled and improve Compatibility and adaptability of the multimedia host 10 and the display screen 20.

In one embodiment, as shown in Figure 2, the multimedia host 10 also 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 to connect the host control controller 11 and LVDS serializer 12; the first video bus 14 is used to connect the host controller 11 and the LVDS serializer 12; the first LVDS bus 15 is used to connect the LVDS serializer 12 and the host connector 16, the host connector 16 is connected to the LVDS transmission cable 30, and the first LVDS bus 15 has a built-in I2C channel;

The display screen 20 also includes a second I2C bus 24, a second video bus 25, a second LVDS bus 26 and a screen connector 27; the second I2C bus 24 is used to connect the screen controller 21 and the LVDS deserializer 22; the second The video bus 25 is used to connect the LVDS deserializer 22 and the LCD screen 23; the second LVDS bus 26 is used to connect the LVDS deserializer 22 and the screen connector 27, and the screen connector 27 is connected to the LVDS transmission cable 30. The second LVDS bus 26 has built-in I2C channels.

Among them, the first I2C bus 13 is a bus provided on the multimedia host 10 for transmitting I2C signals. The first video bus 14 is a bus provided on the multimedia host 10 for transmitting video signals. 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 provided on the display screen 20 for transmitting I2C signals. The second video bus 25 is a bus provided on the display screen 20 for transmitting video signals. The second LVDS bus 26 is a bus provided on the display screen 20 for transmitting LVDS signals. The screen connector 27 is an interface provided on the display screen 20 for connecting the LVDS transmission cable 30 .

As an example, the vehicle-mounted multimedia system is formed with a video signal transmission path. The video signal transmission path sequentially includes a host controller 11 - a first video bus 14 - an LVDS serializer 12 - a first LVDS bus 15 - a host connector 16 - LVDS transmission. Cable 30-screen connector 27-second LVDS bus 26-LVDS deserializer 22-second video bus 25-LCD screen 23. The multimedia host 10 can control the display screen 20 to display video through the video signal transmission path, and the processing includes: (1) The host controller 11 sends 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, and then transmits the LVDS signal to the access host connector 16 through the first LVDS bus 15, and then transmits it to the screen plug connector through the LVDS transmission cable 30 27, and then transmitted 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 then sends the video signal to the liquid crystal screen 23 through the first video bus 14 . (4) The LCD screen 23 receives the video signal and controls the video display. In this example, the host controller 11 needs to read the current screen version information during each initialization process in order to complete the initialization configuration of the display screen 20 based on the current screen version information and pre-stored screen version information. The video signal output by the first video bus 14 can automatically Adapt the video signal received by the second video bus 25 to ensure normal display of the display screen 20 .

As an example, the vehicle-mounted multimedia system is formed with an I2C signal transmission path. The I2C signal transmission path sequentially includes the host controller 11 - the first I2C bus 13 - the LVDS serializer 12 - the built-in I2C channel of the first LVDS bus 15 - the host connector. 16-LVDS transmission cable 30 built-in I2C channel-screen connector 27-second LVDS bus 26 built-in I2C channel-LVDS deserializer 22-second I2C bus 24-screen controller 21. When the multimedia host 10 and the display screen 20 perform read and write operations, the processing includes: (1) The host controller 11 forms an I2C control signal and sends the I2C control signal to the LVDS serializer 12 through 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 built-in I2C channel of the first LVDS bus 15, and then transmits it to the screen plug connector through the built-in I2C channel of the LVDS transmission cable 30 27, and then the screen connector 27 transmits it to the LVDS deserializer 22 through the built-in I2C channel of the second LVDS bus 26. (3) The LVDS deserializer 22 receives the I2C control signal and sends the I2C control signal to the screen controller 21 through the second I2C bus 24 . (4) The screen controller 21 receives the I2C control signal, completes relevant control operations based on the I2C control signal, forms an I2C feedback signal, and then feeds the I2C feedback signal back to the host controller 11 through the I2C signal transmission path to realize the host controller 11 and the screen controller 21. In this example, every time the host controller 11 controls the initialization process of the display screen 20, it can obtain the current screen version information through the I2C signal transmission path, 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, ensuring that 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. The touch sensing module 231 is connected to the screen controller 21 through the 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. The touch sensing module 231 is connected to the screen controller 21 through the third I2C bus 29, which can realize the interaction between the screen controller 21 and the touch sensing module 231. Read and write control operations. Since the host controller 11 can be connected to the screen controller 21 through the above-mentioned I2C signal transmission path, and the screen controller 21 and the touch sensing module 231 are connected through the touch sensing module 231, the touch sensing module 231 of the host controller 11 is indirectly connected. connection to realize the read and write control operations 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 , and the backlight driver 28 is connected to the screen controller 21 and the liquid crystal screen 23 .

As an example, the display screen 20 further includes a backlight driver 28. 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 one embodiment, based on the current screen version information and pre-stored screen version information, the display screen initialization configuration is completed, including:

Obtain the version verification result based on the current screen version information and the pre-stored screen version information;

If the version verification result is that the verification is passed, the display screen configuration information is determined based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and the display screen initialization configuration is completed based on the display screen configuration information;

If the version verification result is that the verification fails, the current screen detailed information corresponding to the display screen is read through the I2C channel, the display screen configuration information is determined based on the current screen detailed information, and the display screen initialization configuration is completed based on the display screen configuration information.

As an example, after receiving the current screen version information and reading the pre-stored screen version information, the host controller 11 calls a pre-configured version verification program, performs version verification on the current screen version information and the pre-stored screen version information, and obtains the version information. Verification result. This version verification result is used to reflect 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 the verification is passed, the host controller 11 determines that the currently connected display screen 20 matches the pre-stored display screen configuration information of the system, and does not If the screen of the display screen 20 cannot be lit or abnormal phenomena such as a black screen and flashing screen occur, the host controller 11 can read the pre-stored screen detailed information corresponding to the pre-stored screen version information, and determine the display screen configuration information based on the pre-stored screen detailed information. Display screen 20 configuration The display screen 20 initializes the configuration. For example, the host controller 11 can determine the display screen configuration information based on the display screen timing sequence and deserializer registers and other pre-stored screen details stored in the host memory, and then complete the initial configuration of the display screen 20 based on the display screen configuration information to ensure that the display screen Normal display of 20.

As an example, when the version verification result of the current screen version information and the pre-stored screen version information is that the verification fails, the host controller 11 determines that the currently connected display screen 20 does not match the system's pre-stored display screen configuration information, which may There may be abnormal phenomena such as the screen of the display screen 20 being unable to light up or a black screen flashing. Therefore, the host controller 11 needs to form a detailed reading command and send the detailed reading command to the screen through the built-in I2C channel of the LVDS transmission cable 30. The controller 21 receives the current screen detailed information corresponding to the display screen 20 returned by the screen controller 21, determines the display screen configuration information based on the current screen detailed information, and configures the initial configuration of the display screen 20 based on the display screen 20. For example, the host controller 11 can determine the display screen configuration information based on the received display screen timing and deserializer registers and other current screen detailed information, and then complete the initial configuration of the display screen 20 based on the display screen configuration information to ensure that the display screen 20 normal display.

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

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

Based on the current screen version information and the pre-stored screen version information, obtain the version verification results, including:

Compare 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 the verification results of all parts are that the verification is passed, the verification result of the version that passed the verification is obtained;

If there is at least one part whose verification result is that the verification fails, the current replacement screen part is determined, and the version verification result is obtained based on the current replacement screen part.

The current part version information is the version information used to uniquely identify the specific screen parts used in the display screen 20 . For example, the current component version information includes the version information of the liquid crystal screen 23, LVDS deserializer 22 or other screen components in the display screen 20. The pre-stored component version information is the version information of a specific screen component pre-stored by the multimedia host 10 . For example, the pre-stored component version information includes the version information of the LCD screen 23, LVDS deserializer 22 or other screen components pre-stored by the multimedia host 10. The current replacement screen parts refer to the screen parts that have been replaced when the system is powered on this time, that is, the screen parts that have been replaced when the system stores the above-mentioned pre-stored screen version information.

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 can correspond the same screen part The current part version information and the pre-stored part version information are compared one by one to obtain the part verification results of each screen part. The part verification results include two types: verification passed and verification failed. For example, the current display screen timing information corresponding to the display screen 20 can be compared with the pre-stored display screen timing information. If the two are consistent, the display screen timing verification result that has passed the verification is obtained; if the two are inconsistent, the verification result is obtained. Failed display timing verification result. For another example, the current deserializer register information corresponding to the LVDS deserializer 22 can be compared with the pre-stored deserializer register information. If the two are consistent, the deserializer register verification result that passes the verification is obtained; if both If they are inconsistent, get the deserializer register verification result that fails the verification.

As an example, the host controller 11 compares all current part version information with its corresponding pre-stored part version information one by one to obtain at least one part verification result. When all part verification results are verification passed, it means that the currently connected The current screen version information corresponding to the display screen 20 matches the pre-stored screen version information stored in the system, that is, there is no replacement of screen parts. Therefore, the version verification result that passes the verification can be directly obtained. Generally speaking, the pre-stored screen version information is the version information of the display screen 20 that was last connected before the current time of the system. If the verification results of all parts are passed, it means that the currently connected display screen 20 is the same as the display screen that was last connected to the system. The screen 20 is the same, there is no replacement of screen parts, and the version verification results that have passed the verification can be obtained directly.

As an example, the host controller 11 compares all current part version information with its corresponding pre-stored part version information one by one to obtain at least one part verification result. When there is at least one part verification result that fails the verification, it indicates that the current part version information does not pass the verification. The current screen version information corresponding to the connected display screen 20 does not completely match the pre-stored screen version information stored in the system, and screen parts need to be replaced. At this time, it is necessary to determine the current part version information based on the part verification result that fails the verification. When screen parts are currently being replaced, the host controller 11 needs to obtain the version verification result based on whether the current replacement of screen parts affects the compatibility adaptation between the multimedia host 10 and the display screen 20 . Understandably, if the current replacement of screen parts affects the compatibility and adaptation between the multimedia host 10 and the display screen 20 , a version verification result that fails the verification is obtained; if the current replacement of the screen parts does not affect the multimedia host 10 and the display screen 20 If the two are compatible and adapted, the version verification result that passes the verification is obtained, so that the display screen configuration information is determined in different ways according to the version verification result, and the initial configuration of the display screen 20 is completed based on the display screen configuration information.

In one embodiment, the version verification results are obtained based on the screen side attributes corresponding to the currently replaced screen parts, including:

According to the current replacement screen parts, obtain the screen end attributes corresponding to the current replacement screen parts;

If the screen side attributes corresponding to the currently replaced screen parts are adaptation-related attributes, obtain the version verification results that fail the verification;

If the screen side attributes corresponding to the currently replaced screen parts are adaptation-independent attributes, obtain the version verification results that pass the verification.

Among them, the screen end attribute is an attribute used to reflect whether the replacement of screen parts will affect the compatibility and adaptation between the multimedia host 10 and the display screen 20 .

As an example, after the host controller 11 determines the current replacement screen parts based on the parts verification results that fail the verification, it needs to determine the screen end attributes corresponding to the current replacement screen parts. The screen end attributes are based on the replacement of the current replacement screen parts. , whether it will affect the attributes determined by the compatible adaptation between the multimedia host 10 and the display screen 20, which include adaptation-related attributes and adaptation-independent attributes, so that according to the two adaptation-related attributes and adaptation-independent attributes Screen side properties to determine whether re-adaptation is required to obtain the corresponding version verification results.

For example, when the screen component is currently replaced with the LCD screen 23, due to the different material characteristics and IC characteristics of each LCD screen 23, the timing of the display screen will be different, and it cannot be adapted to the multimedia host 10. Therefore, its Screen properties are adaptation-related properties.

For example, when the current screen component is the touch sensor module 231 of the liquid crystal screen 23, since the touch sensor module 231 can be independently controlled by the screen controller 21, its replacement will not affect the adaptation of the display screen 20 and the multimedia host 10. Therefore, , whose screen-side attributes are adaptation-independent attributes.

For example, when the current replacement screen component is the LVDS deserializer 22, due to the different LVDS deserializer 22, the timing of the display screen will also be different, and it cannot be adapted to the multimedia host 10. Therefore, its screen end attribute is adaptation-related. Attributes.

For example, when the current replacement screen component is a screen power supply, that is, the power supply built into the display screen 20, since the management and control of the screen power supply can be independently controlled by the screen controller 21, its replacement will not affect the adaptation of the display screen 20 and the multimedia host 10. , therefore, its screen-side attributes are adaptation-independent attributes.

For example, when the current replacement screen component is the backlight driver 28, since the backlight driver 28 can be independently controlled by the screen controller 21, its replacement will not affect the adaptation of the display screen 20 and the multimedia host 10. Therefore, its screen end attribute is adaptation. Irrelevant attributes.

As an example, when the host controller 11 determines that there is at least one current replacement screen component, the screen end attribute corresponding to the component is an adaptation-related attribute, that is, there is at least one current replacement screen that affects the compatible adaptation between the multimedia host 10 and the display screen 20 . When installing parts, the version verification results that fail the verification can be obtained, so that the current screen detailed information corresponding to the display screen 20 can be read through the I2C channel later, the display screen configuration information is determined based on the current screen detailed information, and the completion is completed based on the display screen configuration information. The display screen 20 initializes the configuration to ensure compatibility and adaptation between the multimedia host 10 and the display screen 20 .

As an example, when the host controller 11 determines that the screen end attributes corresponding to all current replacement screen parts are adaptation-independent attributes, that is, there are no current replacement screen parts that affect the compatible adaptation between the multimedia host 10 and the display screen 20 , Obtain the version verification result that has passed the verification, so that the display screen configuration information can be determined based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and the initial configuration of the display screen 20 is completed based on the display screen configuration information, which can ensure that the multimedia host 10 and the display Compatibility and adaptation between screens 20 can also ensure the processing efficiency of their initialization process.

An embodiment of the present invention provides a screen initialization method of a vehicle-mounted multimedia system, which is applied to the vehicle-mounted multimedia system of the above embodiment. As shown in Figure 3, the screen initialization method of the vehicle-mounted multimedia system includes the following steps executed by the host controller 11:

S301: Form a version read command when the system is powered on, and send the version read command to the screen controller through the built-in I2C channel of the LVDS transmission cable;

S302: Receive the current screen version information returned by the screen controller through the built-in I2C channel of the LVDS transmission cable;

S303: Based on the current screen version information and the pre-stored screen version information, complete the initialization configuration of the display screen.

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

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

As an example, in step S302, after the host controller 11 sends the version read command to the screen controller 21 through the built-in I2C channel of the LVDS transmission cable 30, it can receive the screen control through the built-in I2C channel of the LVDS transmission cable 30. The current screen version information returned by the processor 21 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 information such as the display timing sequence and deserializer register corresponding to the display screen 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 can compare and match the current screen version information with the pre-stored screen version information pre-stored in the host memory. According to the comparison and matching As a result, it is determined whether to initialize based on the current screen version information or the pre-stored screen version information. For example, when the current screen version information is consistent with the pre-stored screen version information, the host controller 11 can complete the 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 be based on the pre-stored screen version information. The current screen version information completes the initial configuration of the display screen timing sequence, deserializer register and other information, so that the video signal output by the multimedia host 10 can automatically adapt to the video signal received by the display screen 20, thereby ensuring the normal display of the display screen 20.

Understandably, since the host controller 11 performs the initial configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, when the screen, touch sensing module 231 or other screen parts in the display screen 20 are replaced, only the update is required. The current screen version information of the display screen 20 and its current screen detailed information are stored in the screen memory. During the initialization process of the display screen 20 , the screen controller 21 can receive the version read 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 read instruction to save the current screen version information. Feedback is given to the host controller 11 through the I2C channel, so that the host controller 11 can complete the initialization configuration based on the received current screen version information and pre-stored screen version information. It can be seen from this that when the screen parts of the display screen 20 are replaced, only the relevant hardware and software systems of the display screen 20 need to be modified, and the hardware and software systems of the multimedia host 10 do not need to be modified, thereby achieving decoupling of the multimedia host 10 and the display screen 20 , to improve the compatibility and adaptability of the multimedia host 10 and the display screen 20 .

In the screen initialization method of the vehicle-mounted multimedia system provided in this embodiment, the host controller 11 can read the current screen version information of the display screen 20 through the I2C channel, so as to complete the initialization of the display screen 20 based on the current screen version information and the pre-stored screen version information. Configuration allows the video signal output by the multimedia host 10 to automatically adapt to the video signal received by the display screen 20, thereby ensuring normal display of the display screen 20. Since the host controller 11 needs to read the current screen version information during each initialization process, and then performs the initial configuration of the display screen 20 based on the current screen version information and the pre-stored screen version information, the multimedia host 10 and the display screen 20 can be decoupled and improve Compatibility and adaptability of the multimedia host 10 and the display screen 20.

In one embodiment, as shown in Figure 4, step S303 is to complete the initialization configuration of the display screen based on the current screen version information and the pre-stored screen version information, including:

S501: Obtain the version verification result based on the current screen version information and the pre-stored screen version information;

S502: If the version verification result is that the verification is passed, determine the display screen configuration information based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and complete the display screen initialization configuration based on the display screen configuration information;

S503: If the version verification result is that the verification fails, the current screen detailed information corresponding to the display screen is read through the I2C channel, the display screen configuration information is determined based on the current screen detailed information, and the display screen initialization configuration is completed based on the display screen configuration information.

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 calls a pre-configured version verification program to perform version verification on the current screen version information and the pre-stored screen version information. Verify to obtain the version verification result. The version verification result is used to reflect 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 consistent with the system's pre-stored display screen configuration information. Matching, there will be no abnormal phenomena such as the screen being unable to light up the display screen 20 or a black screen flashing. Therefore, the host controller 11 can read the pre-stored screen detailed information corresponding to the pre-stored screen version information, and determine the display screen based on the pre-stored screen detailed information. The configuration information is configured to initialize the configuration of the display screen 20 based on the display screen 20 . For example, the host controller 11 can determine the display screen configuration information based on the display screen timing sequence and deserializer registers and other pre-stored screen details stored in the host memory, and then complete the initial configuration of the display screen 20 based on the display screen configuration information to ensure that the display screen Normal display of 20.

As an example, in step S503, when the version verification result of the current screen version information and the pre-stored screen version information is that the verification fails, the host controller 11 determines that the currently connected display screen 20 and the system pre-stored display screen configuration information If they do not match, abnormal phenomena such as the screen 20 being unable to light up or a black screen flashing may occur. Therefore, the host controller 11 needs to form a detailed read command and pass the detailed read command through the I2C built in the LVDS transmission cable 30 The channel is sent to the screen controller 21 to receive the current screen detailed information corresponding to the display screen 20 returned by the screen controller 21, determine the display screen configuration information based on the current screen detailed information, and configure the display screen 20 based on the display screen 20 to initialize the configuration. For example, the host controller 11 can determine the display screen configuration information based on the received display screen timing and deserializer registers and other current screen detailed information, and then complete the initial configuration of the display screen 20 based on the display screen configuration information to ensure that the display screen 20 normal display.

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

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

As shown in Figure 5, step S501 is to obtain the version verification result based on the current screen version information and the pre-stored screen version information, including:

S501: Compare at least one current part version information with at least one pre-stored part version information, and obtain at least one part verification result;

S502: If the verification results of all parts are passed, obtain the version verification results that passed the verification;

S503: If there is at least one part that fails the verification, determine the current replacement screen part, and obtain the version verification result based on the current replacement screen part.

The current part version information is the version information used to uniquely identify the specific screen parts used in the display screen 20 . For example, the current component version information includes the version information of the liquid crystal screen 23, LVDS deserializer 22 or other screen components in the display screen 20.

The pre-stored component version information is the version information of specific screen components pre-stored by the multimedia host 10 . For example, the pre-stored component version information includes the version information of the LCD screen 23, LVDS deserializer 22 or other screen components pre-stored 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 can The current part version information corresponding to the same screen part and the pre-stored part version information are compared one by one to obtain the part verification results of each screen part. The part verification results include two types: verification passed and verification failed. For example, the current display screen timing information corresponding to the display screen 20 can be compared with the pre-stored display screen timing information. If the two are consistent, the display screen timing verification result that has passed the verification is obtained; if the two are inconsistent, the verification result is obtained. Failed display timing verification result. For another example, the current deserializer register information corresponding to the LVDS deserializer 22 can be compared with the pre-stored deserializer register information. If the two are consistent, the deserializer register verification result that passes the verification is obtained; if both If they are inconsistent, get the deserializer register verification result that fails the verification.

As an example, in step S502, the host controller 11 compares all current part version information with its corresponding pre-stored part version information one by one to obtain at least one part verification result. When all part verification results are verification passed, It means that the current screen version information corresponding to the currently connected display screen 20 matches the pre-stored screen version information stored in the system, that is, there is no replacement of screen parts. Therefore, the version verification result that passes the verification can be directly obtained. Generally speaking, the pre-stored screen version information is the version information of the display screen 20 that was last connected before the current time of the system. If the verification results of all parts are passed, it means that the currently connected display screen 20 is the same as the display screen that was last connected to the system. The screen 20 is the same, there is no replacement of screen parts, and the version verification results that have passed the verification can be obtained directly.

Among them, the currently replaced screen parts refer to the screen parts that have been replaced when the system is powered on this time, that is, the screen parts that have been replaced when the system stores the above-mentioned pre-stored screen version information.

As an example, in step S503, the host controller 11 compares all current part version information with its corresponding pre-stored part version information one by one to obtain at least one part verification result. If there is at least one part verification result, the verification fails. When, it means that the current screen version information corresponding to the currently connected display screen 20 does not completely match the pre-stored screen version information stored in the system, and there is a screen part replacement. At this time, it is necessary to replace the current part that fails the verification according to the part verification result. Version information determines the current replacement screen parts. The host controller 11 needs to obtain the version verification result based on whether the current replacement screen parts affect the compatibility adaptation between the multimedia host 10 and the display screen 20 . Understandably, if the current replacement of screen parts affects the compatibility and adaptation between the multimedia host 10 and the display screen 20 , a version verification result that fails the verification is obtained; if the current replacement of the screen parts does not affect the multimedia host 10 and the display screen 20 If the two are compatible and adapted, the version verification result that passes the verification is obtained, so that the display screen configuration information is determined in different ways according to the version verification result, and the initial configuration of the display screen 20 is completed based on the display screen configuration information.

In one embodiment, as shown in Figure 6, the version verification results are obtained based on the currently replaced screen parts, including:

S601: According to the current replacement screen parts, obtain the screen end attributes corresponding to the current replacement screen parts;

S602: If the screen-side attributes corresponding to the currently replaced screen parts are adaptation-related attributes, obtain the version verification results that fail the verification;

S603: If the screen-side attributes corresponding to the currently replaced screen parts are adaptation-independent attributes, obtain the version verification result that passes the verification.

Among them, the screen end attribute is an attribute used to reflect whether the replacement of screen parts will affect the compatibility and adaptation between the multimedia host 10 and the display screen 20 .

As an example, in step S601, after the host controller 11 determines the current replacement screen parts based on the parts verification results that failed the verification, it needs to determine the screen end attributes corresponding to the current replacement screen parts. The screen end attributes are based on the current replacement screen parts. Whether the replacement of screen parts will affect the attributes determined by the compatible adaptation between the multimedia host 10 and the display screen 20, which include adaptation-related attributes and adaptation-independent attributes, so that according to the adaptation-related attributes and adaptation-independent attributes Attribute these two screen side attributes to determine whether re-adaptation is needed to obtain the corresponding version verification results.

In this example, when the current screen component is the LCD screen 23, due to the different material characteristics and IC characteristics of each LCD screen 23, the timing of the display screen will be different, and it cannot be adapted to the multimedia host 10. Therefore, , whose screen-side properties are adaptation-related properties.

In this example, when the current screen component is the touch sensor module 231 of the liquid crystal screen 23 , since the touch sensor module 231 can be independently controlled by the screen controller 21 , its replacement will not affect the adaptation of the display screen 20 and the multimedia host 10 , therefore, its screen-side attributes are adaptation-independent attributes.

In this example, when the current replacement screen component is the LVDS deserializer 22, due to the different LVDS deserializer 22, the timing of the display screen will also be different, and it cannot adapt to the multimedia host 10. Therefore, its screen end attribute is appropriate. Equipped with relevant attributes.

In this example, when the current replacement screen component is the screen power supply, that is, the power supply built into the display screen 20, since the management and control of the screen power supply can be independently controlled by the screen controller 21, its replacement will not affect the interaction between the display screen 20 and the multimedia host 10. Adaptation, therefore, its screen-side attributes are adaptation-independent attributes.

In this example, when the current replacement screen component is the backlight driver 28, since the backlight driver 28 can be independently controlled by the screen controller 21, its replacement will not affect the adaptation of the display screen 20 and the multimedia host 10. Therefore, its screen end attributes are: Adaptation-independent properties.

As an example, in step S602, the host controller 11 determines that there is at least one screen end attribute corresponding to the current replacement screen part that is an adaptation-related attribute, that is, there is at least one that affects the compatible adaptation between the multimedia host 10 and the display screen 20. When the current screen parts are replaced, the version verification results that fail the verification can be obtained, so that the current screen detailed information corresponding to the display screen 20 can be read later through the I2C channel, and the display screen configuration information is determined based on the current screen detailed information. Based on the display The screen configuration information completes the initial configuration of the display screen 20, thereby ensuring compatibility and adaptation between the multimedia host 10 and the display screen 20.

As an example, in step S603, the host controller 11 determines that the screen end attributes corresponding to all currently replaced screen parts are adaptation-independent attributes, that is, there is no current replacement that affects the compatible adaptation between the multimedia host 10 and the display screen 20. When the screen part is installed, the version verification result that has passed the verification is obtained, so that the display screen configuration information can be determined based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and the initial configuration of the display screen 20 is completed based on the display screen configuration information, which can ensure multimedia The compatibility and adaptation between the host 10 and the display screen 20 can also ensure the processing efficiency of their initialization process.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions of the foregoing embodiments. Modifications are made to the recorded technical solutions, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of each embodiment of the present invention, and should all be included in the present invention. within the scope of protection.

Claims (9)

1. A vehicle-mounted multimedia system, characterized by including a multimedia host, a display screen and an LVDS transmission cable; The multimedia host includes a host controller and an LVDS serializer, and the host controller is connected to the LVDS serializer; The display screen includes a screen controller, an LVDS deserializer and a liquid crystal screen; the screen controller is connected to the LVDS deserializer and the liquid crystal screen; the LVDS deserializer is connected to the liquid crystal screen; The multimedia host also includes a first I2C bus, a first video bus, a first LVDS bus and a host connector; the first I2C bus is used to connect the host controller and the LVDS serializer and transmit I2C signals ; The first video bus is used to connect the host controller and the LVDS serializer to transmit video signals; the first LVDS bus is used to connect the LVDS serializer and the host connector, so The host connector is connected to the LVDS transmission cable, the first LVDS bus has a built-in I2C channel, and the first LVDS bus is used to transmit LVDS signals and I2C signals; The display screen also includes a second I2C bus, a second video bus, a second LVDS bus and a screen connector; the second I2C bus is used to connect the screen controller and the LVDS deserializer to transmit I2C signal; the second video bus is used to connect the LVDS deserializer and the LCD screen to transmit video signals; the second LVDS bus is used to connect the LVDS deserializer and the screen connector, The screen connector is connected to the LVDS transmission cable, the second LVDS bus has a built-in I2C channel, and the second LVDS bus is used to transmit LVDS signals and I2C signals; The LVDS transmission cable is connected to the LVDS serializer and the LVDS deserializer, and the LVDS transmission cable has a built-in I2C channel; The host controller is configured to read the current screen version information corresponding to the display screen through the I2C channel, and complete the initialization configuration of the display screen based on the current screen version information and pre-stored screen version information. 2. The vehicle-mounted multimedia system according to claim 1, wherein the liquid crystal screen includes a screen and a touch sensing module connected to the screen, and the touch sensing module and the screen controller pass through a third connected to the I2C bus. 3. The vehicle-mounted multimedia system according to any one of claims 1-2, characterized in that, based on the current screen version information and pre-stored screen version information, completing the initialization configuration of the display screen includes: Obtain the version verification result based on the current screen version information and the pre-stored screen version information; If the version verification result is that the verification is passed, the display screen configuration information is determined based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and the display screen initialization configuration is completed based on the display screen configuration information; If the version verification result is that the verification fails, the current screen detailed information corresponding to the display screen is read through the I2C channel, and the display screen configuration information is determined based on the current screen detailed information. The configuration information completes the display initialization configuration. 4. The vehicle-mounted multimedia system according to claim 3, wherein the current screen version information includes at least one current part version information; the pre-stored screen version information includes at least one pre-stored part version information; Obtaining the version verification result based on the current screen version information and pre-stored screen version information includes: Compare at least one of the current part version information with at least one of the pre-stored part version information to obtain at least one part verification result; If the verification results of all the parts mentioned are that the verification is passed, the version verification result that passes the verification is obtained; If at least one of the parts has a verification result that fails the verification, the current replacement screen part is determined, and the version verification result is obtained based on the current replacement screen part. 5. The vehicle-mounted multimedia system according to claim 4, wherein the obtaining the version verification result according to the screen terminal attributes corresponding to the current replacement screen parts includes: According to the current replacement screen parts, obtain the screen end attributes corresponding to the current replacement screen parts; If the screen side attributes corresponding to the current replacement screen parts are adaptation-related attributes, obtain the version verification results that fail the verification; If the screen side attributes corresponding to the current replacement screen parts are adaptation-independent attributes, obtain the version verification results that fail the verification. 6. A screen initialization method for a vehicle-mounted multimedia system, characterized in that, applied to the vehicle-mounted multimedia system according to any one of claims 1-2, it includes the following steps executed by a host controller: A version read command is formed when the system is powered on, and the version read command is sent to the screen controller through the built-in I2C channel of the LVDS transmission cable; Receive the current screen version information returned by the screen controller through the built-in I2C channel of the LVDS transmission cable; Based on the current screen version information and the pre-stored screen version information, the initialization configuration of the display screen is completed. 7. The screen initialization method of a vehicle-mounted multimedia system as claimed in claim 6, wherein the completion of the display screen initialization configuration based on the current screen version information and pre-stored screen version information includes: Obtain the version verification result based on the current screen version information and the pre-stored screen version information; If the version verification result is that the verification is passed, the display screen configuration information is determined based on the pre-stored screen detailed information corresponding to the pre-stored screen version information, and the display screen initialization configuration is completed based on the display screen configuration information; If the version verification result is that the verification fails, the current screen detailed information corresponding to the display screen is read through the I2C channel, and the display screen configuration information is determined based on the current screen detailed information. The configuration information completes the display initialization configuration. 8. The screen initialization method of the vehicle-mounted 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 includes at least one pre-stored part version information; Obtaining the version verification result based on the current screen version information and pre-stored screen version information includes: Compare at least one of the current part version information with at least one of the pre-stored part version information to obtain at least one part verification result; If the verification results of all the parts mentioned are that the verification is passed, the version verification result that passes the verification is obtained; If at least one of the parts has a verification result that fails the verification, the current replacement screen part is determined, and the version verification result is obtained based on the current replacement screen part. 9. The screen initialization method of a vehicle-mounted multimedia system as claimed in claim 8, wherein obtaining a version verification result based on the currently replaced screen parts includes: According to the current replacement screen parts, obtain the screen end attributes corresponding to the current replacement screen parts; If the screen side attributes corresponding to the current replacement screen parts are adaptation-related attributes, obtain the version verification results that fail the verification; If the screen side attributes corresponding to the current replacement screen parts are adaptation-independent attributes, obtain the version verification results that fail the verification.