CN117648069A - Vehicle-mounted screen display system and display method - Google Patents
Vehicle-mounted screen display system and display method Download PDFInfo
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- CN117648069A CN117648069A CN202311775886.2A CN202311775886A CN117648069A CN 117648069 A CN117648069 A CN 117648069A CN 202311775886 A CN202311775886 A CN 202311775886A CN 117648069 A CN117648069 A CN 117648069A
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Abstract
The invention provides a vehicle-mounted screen display system and a display method, wherein the system comprises the following steps: the system comprises a virtual bus module arranged between the vehicle-mounted central control system and the vehicle-mounted instrument system, a front-end virtual display card driver arranged on the vehicle-mounted central control system, a virtual display card and a rear-end virtual display card driver arranged on the vehicle-mounted instrument system, and a rear-end image display module. According to the invention, the communication channel is established between the vehicle-mounted central control system and the vehicle-mounted instrument system by establishing the shared memory, so that the vehicle-mounted central control system calls the virtual display card to render the image data through the virtual display card drive, and the rendered image to be displayed is sent to the rear-end virtual display card drive of the vehicle-mounted instrument system through the communication channel, so that the rear-end virtual display card drive displays the image to be displayed through the rear-end image display module, the unified operation display of the vehicle-mounted central control screen and the vehicle-mounted instrument screen through the vehicle-mounted central control system is realized, and the use experience of a user is greatly improved.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted screen display, in particular to a vehicle-mounted screen display system and a vehicle-mounted screen display method.
Background
Along with the development of automobile intellectualization, automobile-mounted systems are becoming more popular, automobile-mounted screens on automobiles are becoming more popular, each existing automobile-mounted screen is provided with an independent automobile-mounted display system, and a plurality of automobile-mounted display systems are mutually independent, so that operation of users is split, and use experience is reduced.
At present, the vehicle-mounted system solves the problem of multi-screen sharing display, the means used is realized through highly customized APP, and the method leads to various and non-uniform APP interfaces, so how to provide a vehicle-mounted screen display scheme with simple operation and simple maintenance for users is a problem to be solved urgently.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a vehicle-mounted screen display system and a vehicle-mounted screen display method, which are used for solving the problem of how to provide a vehicle-mounted screen display scheme with simple operation and simple maintenance for a user.
In a first aspect of the present invention, there is provided a vehicle-mounted screen display system, comprising: the system comprises a virtual bus module, a front-end virtual display card driver, a virtual display card and a rear-end image display module, wherein the virtual bus module is arranged between a vehicle-mounted central control system and a vehicle-mounted instrument system, and the front-end virtual display card driver and the virtual display card are arranged on the vehicle-mounted central control system;
the virtual bus module is used for establishing a shared memory between the vehicle-mounted central control system and the vehicle-mounted instrument system and establishing a communication channel;
the front-end virtual display card driver is used for rendering the image data sent by the vehicle-mounted central control system through the virtual display card and sending the rendered image to be displayed to the rear-end virtual display card driver through the communication channel;
and the back-end virtual display card driver is used for displaying the image to be displayed through the back-end image display module.
On the basis of the technical scheme, the invention can also make the following improvements.
Preferably, the virtual bus module is further configured to provide registration, detection, command interaction, data transmission and drive assistance services for the front-end virtual graphics card driver and the back-end virtual graphics card driver.
Preferably, the front-end virtual graphics card driver is further configured to send a name of the front-end virtual graphics card driver and a device type of the front-end virtual graphics card driver to the virtual bus module to complete registration after loading of the front-end virtual graphics card driver is completed.
Preferably, the back-end virtual graphics card driver is further configured to send a name of the back-end virtual graphics card driver to the virtual bus module and register a service type provided externally after the back-end virtual graphics card driver is loaded.
Preferably, the service type of the back-end virtual display card driver includes page turning, frame buffer association, frame buffer separation, creation of a display buffer, release of the display buffer, configuration item setting, and acquisition of the ED ID of the display.
Preferably, the vehicle-mounted central control system is further provided with a screen parameter setting module;
and the screen parameter setting module is used for carrying out default value setting and/or dynamic configuration on the screen parameters of the virtual display card.
Preferably, the vehicle-mounted central control system is further provided with a display card driver and a physical display card;
and the display card driver is used for rendering and displaying the image data to be displayed, which is sent by the vehicle-mounted central control system, by using a physical display card.
Preferably, the vehicle-mounted central control system is further provided with a display card management module;
and the display card management module is used for carrying out instruction management on the virtual display card and the physical display card.
In a second aspect of the present invention, a vehicle-mounted screen display method is provided, which is applied to the vehicle-mounted screen display system, the system includes a virtual bus module disposed between a vehicle-mounted central control system and a vehicle-mounted instrument system, a front-end virtual display card driver and a virtual display card disposed in the vehicle-mounted central control system, and a rear-end virtual display card driver and a rear-end image display module disposed in the vehicle-mounted instrument system, and the method includes:
the virtual bus module establishes a shared memory between the vehicle-mounted central control system and the vehicle-mounted instrument system and establishes a communication channel;
the front-end virtual display card driver renders the image data sent by the vehicle-mounted central control system through a virtual display card, and sends the rendered image to be displayed to the rear-end virtual display card driver of the vehicle-mounted instrument system through the communication channel;
and the rear-end virtual display card drives the image to be displayed through a rear-end image display module of the vehicle-mounted instrument system.
Preferably, the virtual bus module is further configured to provide registration, detection, command interaction, data transmission and drive assistance services for the front-end virtual graphics card driver and the back-end virtual graphics card driver.
The invention provides a vehicle-mounted screen display system and a display method, wherein the system comprises the following steps: the system comprises a virtual bus module arranged between the vehicle-mounted central control system and the vehicle-mounted instrument system, a front-end virtual display card driver arranged on the vehicle-mounted central control system, a virtual display card and a rear-end virtual display card driver arranged on the vehicle-mounted instrument system, and a rear-end image display module. According to the invention, the shared memory is established between the vehicle-mounted central control system and the vehicle-mounted instrument system to establish a communication channel, so that the vehicle-mounted central control system calls the virtual display card to render the image data through the virtual display card drive, and the rendered image to be displayed is sent to the rear-end virtual display card drive of the vehicle-mounted instrument system through the communication channel, so that the rear-end virtual display card drive displays the image to be displayed through the rear-end image display module, the unified operation display of the vehicle-mounted central control screen and the vehicle-mounted instrument screen through the vehicle-mounted central control system is realized, and the vehicle-mounted instrument system only needs to register and update the rear-end virtual display card drive, thereby greatly improving the use experience of users.
Drawings
FIG. 1 is a schematic diagram of a vehicle-mounted screen display system according to the present invention;
FIG. 2 is a schematic diagram of a vehicle-mounted screen display system architecture provided by the present invention;
FIG. 3 is a schematic diagram of an image display logic provided by the present invention;
fig. 4 is a flowchart of a vehicle-mounted screen display method provided by the invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In this embodiment, the vehicle-mounted central control system and the vehicle-mounted instrument system are respectively provided with a matched physical display screen (a vehicle-mounted central control screen and a vehicle-mounted instrument screen), and meanwhile, the vehicle-mounted central control system also adopts a virtual screen to display the relevant screen of the vehicle-mounted entertainment system on the vehicle-mounted instrument screen.
Referring to fig. 1, fig. 1 is a schematic diagram of a vehicle-mounted screen display system according to an embodiment of the present invention, as shown in fig. 1, a vehicle-mounted screen display system includes: the system comprises a virtual bus module 100 arranged between a vehicle-mounted central control system and a vehicle-mounted instrument system, a front-end virtual display card driver 200 arranged in the vehicle-mounted central control system, a virtual display card 300, a rear-end virtual display card driver 400 arranged in the vehicle-mounted instrument system and a rear-end image display module 500.
The virtual bus module 100 is configured to establish a shared memory between the vehicle-mounted central control system and the vehicle-mounted instrument system, and establish a communication channel; the front-end virtual graphic card driver 200 is configured to render image data sent by the vehicle-mounted central control system through the virtual graphic card 300, and send an image to be displayed obtained by rendering to the back-end virtual graphic card driver 400 through the communication channel; the back-end virtual graphics card driver 400 is configured to display the image to be displayed through the back-end image display module 500.
Note that, in this embodiment, the vehicle-mounted central control system (Guest VM) is an android system, and the vehicle-mounted meter system (Host VM) is a Li nux system.
It can be appreciated that the virtual bus module may be based on a shared memory mechanism provided by the hypervi server, so as to implement a front-end and back-end high-speed communication channel.
Further, the virtual bus module is further configured to provide registration, detection, command interaction, data transmission, and drive assistance services for the front-end virtual graphics card driver and the back-end virtual graphics card driver.
Further, the front-end virtual graphics card driver is further configured to send a name of the front-end virtual graphics card driver and a device type of the front-end virtual graphics card driver to the virtual bus module to complete registration after loading of the front-end virtual graphics card driver is completed.
Further, the back-end virtual graphics card driver is further configured to send a name of the back-end virtual graphics card driver and a service type provided by the back-end virtual graphics card driver to the virtual bus module to complete registration after loading of the back-end virtual graphics card driver is completed.
It should be understood that the working principle of the virtual graphics card in this embodiment is that the graphics card commands the channel, and the data is mapped and then filled through the shared memory medium provided by the hypervisor, so as to build the data copying time.
It may be further understood that the rear-end image display module may be a vehicle-mounted instrument display screen, and the manner in which the rear-end virtual graphics card driver displays the image through the rear-end image display module may be based on a wayland protocol, and after creating a wayland display surface, display the acquired virtual graphics card image on the wayland display surface. Meanwhile, the wayland provides a good image layer management interface, so that parameters of the display surface can be conveniently and quickly adjusted.
Further, the service types of the back-end virtual display card driver comprise page turning, frame buffer area association, frame buffer area separation, display buffer area creation, display buffer area release, configuration item setting and display EDID acquisition.
Specifically, the implementation of the critical graphics command service required by the back-end virtual graphics driver includes: implementing page flip effect (pageFlip), a Frame Buffer Object (FBO) connected to a specified location in the rendering pipeline of OpenGL, separating the current Frame Buffer Object (FBO) from the current rendering context, creating a container on the screen (to store graphics or text to be drawn on the screen), freeing up related resources and memory space (so that other programs or operations can continue to use this part of the resources), setting configuration parameters (location, resolution, bitmap, etc.), obtaining EDID of the display (including resolution of the display, supported refresh rate, color capability, and other functional information).
Further, the vehicle-mounted central control system is also provided with a screen parameter setting module; and the screen parameter setting module is used for carrying out default value setting and/or dynamic configuration on the screen parameters of the virtual display card.
It can be understood that the screen parameter setting module is configured to set the screen parameters of the virtual graphics card, including whether to use default setting or use dynamic parameter configuration.
Further, the vehicle-mounted central control system is also provided with a display card driver and a physical display card; and the display card driver is used for rendering and displaying the image data to be displayed, which is sent by the vehicle-mounted central control system, by using a physical display card.
Further, the vehicle-mounted central control system is also provided with a display card management module; and the display card management module is used for carrying out instruction management on the virtual display card and the physical display card.
It can be understood that the android operating system where the virtual graphics card is located has a system image display that needs to pass through the hw composer layer, and the hw composer layer operates the graphics card to display the system image. However, the native hw composer does not support the mode of multi-graphics card to operate, so the hw composer needs to be modified to support the mode of multi-graphics card. The display device exposes a plurality of display surfaces to the surface eFlinger of the upper layer, and operates different display cards (whether physical display cards or virtual display cards) to the lower layer according to the difference of the surfaces to be operated of the upper layer.
It can be appreciated that based on the defects in the background technology, the embodiment of the invention provides a vehicle-mounted screen display system. The system comprises: the system comprises a virtual bus module arranged between the vehicle-mounted central control system and the vehicle-mounted instrument system, a front-end virtual display card driver arranged on the vehicle-mounted central control system, a virtual display card and a rear-end virtual display card driver arranged on the vehicle-mounted instrument system, and a rear-end image display module. According to the invention, the shared memory is established between the vehicle-mounted central control system and the vehicle-mounted instrument system to establish a communication channel, so that the vehicle-mounted central control system calls the virtual display card to render the image data through the virtual display card drive, and the rendered image to be displayed is sent to the rear-end virtual display card drive of the vehicle-mounted instrument system through the communication channel, so that the rear-end virtual display card drive displays the image to be displayed through the rear-end image display module, the unified operation display of the vehicle-mounted central control screen and the vehicle-mounted instrument screen through the vehicle-mounted central control system is realized, and the vehicle-mounted instrument system only needs to register and update the rear-end virtual display card drive, thereby greatly improving the use experience of users.
In a possible application scenario, referring to fig. 2, fig. 2 is a schematic diagram of a vehicle-mounted screen display system architecture provided by the present invention, and in fig. 2, the present embodiment mainly relates to a Hypervisor (virtualization), an instrument system (Linux system Host VM) and a central control system (Android system Guest VM); the system comprises a central control system, an instrument system, a hardware display card, a display interface, a bus interface and a data channel, wherein the virtual display card is established by the central control system, the App unified operation interface is provided by the central control system, a service program at the rear end of the virtual display card is established by the instrument system and is communicated with the front-end virtual display card through a communication bus, the communication bus is interacted by the front-end and rear-end display card is provided by the Hypervisor, command management of the hardware display card and the virtual display card is responsible for command management of the hardware display card, the display interface of the display card is provided for a surface eFinger layer, the attribute of screen corresponding to the virtual display card is set by the App, and when the instrument system and the central control system are started, the bus interface and the data channel are established by the Hypervisor, and virtual secondary display data of the central control system are transmitted to a designated area at the instrument system end for display through an event channel and a gradtable.
In the embodiment, the physical screen is adopted by the main screen of the vehicle-mounted central control system, the display effect of the main screen is good, the virtual auxiliary screen is adopted by the auxiliary screen, the unification of interfaces can be achieved, the universality of an App is high, and parameters such as the position, the resolution, the opacity and the like of the virtual auxiliary screen of the central control system displayed on the physical screen of the instrument system can be adjusted.
In a possible application scenario, referring to fig. 3, fig. 3 is a schematic diagram of an image display logic provided by the present invention, in fig. 3, a central control system displays a system image of the central control system on a display 1 through a hardware display card, and simultaneously transmits a display image of a secondary screen of the central control system to a display 2 of an instrument system through a virtual display card; the system image of the instrument system is displayed on the display 2 through the hardware display card by the instrument system, so that the system image of the instrument system is displayed on the instrument system display 2 and the image of the auxiliary screen of the central control system is also displayed.
In the embodiment, the virtual sub-screen image of the central control system is displayed on the display 2 of the instrument system through the virtual display card, and parameters such as position, resolution, opacity and the like displayed on the display of the instrument system are dynamically adjusted, so that a scheme of a multi-screen display system and a display method on a vehicle-mounted system based on Li nux/android virtualization (Hypervi sor) is realized, and the problems of high requirement on App customization of the central control system and non-uniform interfaces in the current vehicle-mounted system are solved.
Referring to fig. 4, fig. 4 is a flowchart of a vehicle-mounted screen display method provided by the present invention, as shown in fig. 4, applied to the vehicle-mounted screen display system, where the system includes a virtual bus module disposed between a vehicle-mounted central control system and a vehicle-mounted instrument system, a front-end virtual display card driver and a virtual display card disposed in the vehicle-mounted central control system, and a rear-end virtual display card driver and a rear-end image display module disposed in the vehicle-mounted instrument system, and the method includes:
step S100: the virtual bus module establishes a shared memory between the vehicle-mounted central control system and the vehicle-mounted instrument system and establishes a communication channel;
step S200: the front-end virtual display card driver renders the image data sent by the vehicle-mounted central control system through a virtual display card, and sends the rendered image to be displayed to the rear-end virtual display card driver of the vehicle-mounted instrument system through the communication channel;
step S300: and the rear-end virtual display card drives the image to be displayed through a rear-end image display module of the vehicle-mounted instrument system.
Further, the virtual bus module is further configured to provide registration, detection, command interaction, data transmission, and drive assistance services for the front-end virtual graphics card driver and the back-end virtual graphics card driver.
It may be understood that, in the vehicle-mounted screen display method provided by the present invention corresponds to the vehicle-mounted screen display system provided in the foregoing embodiments, relevant technical features of the vehicle-mounted screen display method may refer to relevant technical features of the vehicle-mounted screen display system, which are not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. An on-board screen display system, the system comprising: the system comprises a virtual bus module, a front-end virtual display card driver, a virtual display card and a rear-end image display module, wherein the virtual bus module is arranged between a vehicle-mounted central control system and a vehicle-mounted instrument system, and the front-end virtual display card driver and the virtual display card are arranged on the vehicle-mounted central control system;
the virtual bus module is used for establishing a shared memory between the vehicle-mounted central control system and the vehicle-mounted instrument system and establishing a communication channel;
the front-end virtual display card driver is used for rendering the image data sent by the vehicle-mounted central control system through the virtual display card and sending the rendered image to be displayed to the rear-end virtual display card driver through the communication channel;
and the back-end virtual display card driver is used for displaying the image to be displayed through the back-end image display module.
2. The on-board screen display system of claim 1, wherein the virtual bus module is further configured to provide registration, detection, command interaction, data transmission, and drive assistance services for the front-end virtual graphics card driver and the back-end virtual graphics card driver.
3. The on-board screen display system of claim 2, wherein the front-end virtual graphics driver is further configured to send a name of the front-end virtual graphics driver and a device type of the front-end virtual graphics driver to the virtual bus module to complete registration after loading of the front-end virtual graphics driver is completed.
4. The on-vehicle screen display system of claim 2, wherein the back-end virtual graphics driver is further configured to send a name of the back-end virtual graphics driver to the virtual bus module and register a service type provided externally after the back-end virtual graphics driver is loaded.
5. The on-board screen display system of claim 4, wherein the service types of the back-end virtual graphics card driver include page turning, frame buffer association, frame buffer separation, creation of a display buffer, release of a display buffer, configuration item setting, acquisition of display EDID.
6. The vehicle-mounted screen display system according to claim 1, wherein the vehicle-mounted central control system is further provided with a screen parameter setting module;
and the screen parameter setting module is used for carrying out default value setting and/or dynamic configuration on the screen parameters of the virtual display card.
7. The vehicle-mounted screen display system according to claim 1, wherein the vehicle-mounted central control system is further provided with a graphic card driver and a physical graphic card;
and the display card driver is used for rendering and displaying the image data to be displayed, which is sent by the vehicle-mounted central control system, by using a physical display card.
8. The vehicle-mounted screen display system according to claim 7, wherein the vehicle-mounted central control system is further provided with a graphic card management module;
and the display card management module is used for carrying out instruction management on the virtual display card and the physical display card.
9. The vehicle-mounted screen display method is characterized by being applied to a vehicle-mounted screen display system, wherein the system comprises a virtual bus module arranged between a vehicle-mounted central control system and a vehicle-mounted instrument system, a front-end virtual display card driver and a virtual display card arranged in the vehicle-mounted central control system, and a rear-end virtual display card driver and a rear-end image display module arranged in the vehicle-mounted instrument system, and the method comprises the following steps:
the virtual bus module establishes a shared memory between the vehicle-mounted central control system and the vehicle-mounted instrument system and establishes a communication channel;
the front-end virtual display card driver renders the image data sent by the vehicle-mounted central control system through a virtual display card, and sends the rendered image to be displayed to the rear-end virtual display card driver of the vehicle-mounted instrument system through the communication channel;
and the rear-end virtual display card drives the image to be displayed through a rear-end image display module of the vehicle-mounted instrument system.
10. The vehicle-mounted screen display method of claim 9, wherein the virtual bus module is further configured to provide registration, detection, command interaction, data transmission, and drive assistance services for the front-end virtual graphics card driver and the back-end virtual graphics card driver.
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