阅读说明：本技术 一种车载系统及其仪表显示器的主题界面切换方法 (Vehicle-mounted system and theme interface switching method of instrument display thereof ) 是由 陈亚斌 于 2019-10-31 设计创作，主要内容包括：本发明提供了一种车载系统及其仪表显示器的主题界面切换方法。主题界面包括仪表显示器的自有画面和由信息娱乐主机传输至仪表显示器的视频画面。该方法包括：仪表显示器向信息娱乐主机发送携带有目标主题界面标识的主题界面切换请求；信息娱乐主机根据接收的主题界面切换请求中的目标主题界面标识执行视频画面的切换操作；若切换成功,信息娱乐主机向仪表显示器发送切换成功信息,并向仪表显示器发送与目标主题界面对应的视频画面数据；仪表显示器在接收到切换成功信息以及与目标主题界面对应的视频画面数据后,将当前主题界面切换至目标主题界面。本发明通过消息交互来同步切换时序,切换速度快且保证切换后显示模式合理。(The invention provides a vehicle-mounted system and a theme interface switching method of an instrument display of the vehicle-mounted system. The theme interface includes the own view of the meter display and the video view transmitted to the meter display by the infotainment host. The method comprises the following steps: the instrument display sends a theme interface switching request carrying a target theme interface identifier to the infotainment host; the infotainment host executes the switching operation of the video pictures according to the target theme interface identification in the received theme interface switching request; if the switching is successful, the infotainment host sends switching success information to the instrument display, and sends video picture data corresponding to the target theme interface to the instrument display; and after the instrument display receives the switching success information and the video picture data corresponding to the target theme interface, switching the current theme interface to the target theme interface. The invention synchronously switches the time sequence through message interaction, has high switching speed and ensures that the display mode is reasonable after switching.)

1. A theme interface switching method of an instrument display of a vehicle-mounted system is characterized in that the theme interface comprises a self picture of the instrument display and a video picture transmitted to the instrument display by an infotainment host; the method comprises the following steps:

the instrument display sends a theme interface switching request carrying an identifier to be switched to a target theme interface to the infotainment host;

after receiving the theme interface switching request, the infotainment host executes the switching operation of the video pictures according to the identification of the target theme interface;

if the switching operation is successfully executed, the infotainment host sends switching success information to the instrument display, and sends video picture data corresponding to the target theme interface to the instrument display;

and after receiving the switching success information and the video picture data corresponding to the target theme interface, the instrument display switches the current theme interface to the target theme interface according to the own picture corresponding to the target theme interface and the received video picture data, wherein the target theme interface is different from the current theme interface.

2. The method of claim 1, after the infotainment host receives the theme interface switch request and before performing the video screen switch operation based on the identification of the target theme interface, further comprising:

the infotainment host returns a first confirmation message to the meter display indicating that the subject interface switch request has been successfully received.

3. The method of claim 2,

and if the first confirmation message is not received by the instrument display within first preset time after the theme interface switching request is sent, the theme interface switching request is sent to the infotainment host again.

4. The method of claim 2, after the infotainment host sends a switch success message to the meter display and before sending video picture data corresponding to the target subject interface to the meter display, further comprising:

the infotainment host receives a second confirmation message sent by the meter display in response to the handover success message.

5. The method of claim 4,

and if the infotainment host does not receive the second confirmation message within second preset time after sending the switching success message, the infotainment host resends the switching success message to the instrument display.

6. The method of claim 2, after the infotainment host receives the theme interface switch request and before performing the video screen switch operation based on the identification of the target theme interface, further comprising:

the infotainment host caches video picture data corresponding to the current theme interface.

7. The method of claim 6, further comprising, after the infotainment host performing the switching operation of the video frame based on the identification of the target subject interface:

if the switching operation fails to be executed, the infotainment host sends switching failure information to the instrument display, acquires the cached video picture data corresponding to the current theme interface and sends the video picture data to the instrument display;

and after receiving the switching failure information and the video picture data corresponding to the current theme interface, the instrument display keeps displaying the current theme interface based on the received video picture data.

8. The method of claim 7, wherein after the infotainment host sends the switch failure information to the meter display, and before retrieving and sending the cached video frame data corresponding to the current subject interface to the meter display, further comprising:

the infotainment host receives a third confirmation message sent by the meter display in response to the handover failure message.

9. The method of claim 8,

and if the infotainment host does not receive the third confirmation message within third preset time after sending the switching failure message, the infotainment host sends the switching failure message to the instrument display again.

10. An in-vehicle system, comprising:

the system comprises an instrument display and an information entertainment host, wherein the instrument display is used for displaying a theme interface, and the theme interface comprises a self picture of the instrument display and a video picture transmitted to the instrument display by the information entertainment host; and

the information entertainment host computer is in communication connection with the instrument display and is used for transmitting the data of the video pictures to the instrument display; it is characterized in that the preparation method is characterized in that,

when the theme interface of the instrument display needs to be switched, the theme interface switching method of the instrument display of the vehicle-mounted system according to any one of claims 1 to 9 is performed.

Technical Field

The invention relates to the technical field of vehicle-mounted information entertainment products, in particular to a vehicle-mounted system and a theme interface switching method of an instrument display of the vehicle-mounted system.

Background

Currently, in some vehicle-mounted systems, especially in vehicle-mounted entertainment systems, a meter display (also called a Dash Integration Module, DIM) displays information related to the meter itself, such as vehicle speed per hour, engine speed, and mileage, as well as other media information, such as navigation information, telephone information, and music information. The media information is transmitted to the meter display by an Infotainment Head Unit (IHU) by way of, for example, Low-Voltage Differential Signaling (LVDS) video output. The vehicle speed per hour, the engine speed, the mileage and other meter information and the navigation information and other media information are laid out according to a certain mode to form a specific theme interface. When the meter display needs to switch the theme interface, the picture styles and display modes of the meter information and the media information need to be changed correspondingly. However, since the meter information is displayed by the meter itself and is the own picture of the meter display, and the media information is transmitted by the IHU, it results in that the two video streams (i.e. the meter information and the media information) cannot be switched at the same time in the prior art, so that the switching speed of the theme interface is slow, and the switched mode display may be unreasonable, and the user experience is poor.

Disclosure of Invention

In view of the above, the present invention has been made to provide a subject interface switching method of an instrument display of an in-vehicle system and an in-vehicle system that overcome or at least partially solve the above problems.

The invention aims to provide a theme interface switching method of an instrument display of a vehicle-mounted system, which is high in switching speed and ensures a reasonable display mode after switching.

It is a further object of the present invention to avoid cluttering of the screen when the switching of the theme interface of the meter display fails.

According to an aspect of an embodiment of the present invention, there is provided a theme interface switching method for an instrument display of an in-vehicle system, the theme interface including an own picture of the instrument display and a video picture transmitted to the instrument display by an infotainment host; the method comprises the following steps:

the instrument display sends a theme interface switching request carrying an identifier to be switched to a target theme interface to the infotainment host;

after receiving the theme interface switching request, the infotainment host executes the switching operation of the video pictures according to the identification of the target theme interface;

if the switching operation is successfully executed, the infotainment host sends switching success information to the instrument display, and sends video picture data corresponding to the target theme interface to the instrument display;

and after receiving the switching success information and the video picture data corresponding to the target theme interface, the instrument display switches the current theme interface to the target theme interface according to the own picture corresponding to the target theme interface and the received video picture data, wherein the target theme interface is different from the current theme interface.

Optionally, after the infotainment host receives the theme interface switching request and before the video screen switching operation is performed according to the identification of the target theme interface, the method further includes:

the infotainment host returns a first confirmation message to the meter display indicating that the subject interface switch request has been successfully received.

Optionally, if the first confirmation message is not received within a first predetermined time after the theme interface switching request is sent by the instrument display, the theme interface switching request is sent to the infotainment host again.

Optionally, after the infotainment host sends the switch success information to the meter display and before sending the video picture data corresponding to the target subject interface to the meter display, the method further comprises:

the infotainment host receives a second confirmation message sent by the meter display in response to the handover success message.

Optionally, if the infotainment host does not receive the second confirmation message within a second predetermined time after sending the switching success message, the infotainment host resends the switching success message to the meter display.

Optionally, after the infotainment host receives the theme interface switching request and before the video screen switching operation is performed according to the identification of the target theme interface, the method further includes:

the infotainment host caches video picture data corresponding to the current theme interface.

Optionally, after the infotainment host performs the switching operation of the video frame according to the identification of the target theme interface, the method further includes:

if the switching operation fails to be executed, the infotainment host sends switching failure information to the instrument display, acquires the cached video picture data corresponding to the current theme interface and sends the video picture data to the instrument display;

and after receiving the switching failure information and the video picture data corresponding to the current theme interface, the instrument display keeps displaying the current theme interface based on the received video picture data.

Optionally, after the infotainment host sends the switching failure information to the meter display, before the cached video picture data corresponding to the current theme interface is acquired and sent to the meter display, the method further includes:

the infotainment host receives a third confirmation message sent by the meter display in response to the handover failure message.

Optionally, if the infotainment host does not receive the third confirmation message within a third predetermined time after sending the switching failure message, the switching failure message is sent to the meter display again.

According to another aspect of the embodiments of the present invention, there is also provided an in-vehicle system, including:

the system comprises an instrument display and an information entertainment host, wherein the instrument display is used for displaying a theme interface, and the theme interface comprises a self picture of the instrument display and a video picture transmitted to the instrument display by the information entertainment host; and

the information entertainment host computer is in communication connection with the instrument display and is used for transmitting the data of the video pictures to the instrument display; wherein the content of the first and second substances,

when the theme interface of the instrument display needs to be switched, the theme interface switching method of the instrument display of the vehicle-mounted system, which is described in any one of the above, is executed.

In the theme interface switching method for the instrument display of the vehicle-mounted system, the theme interface of the instrument display comprises the own picture of the instrument display and the video picture transmitted to the instrument display by the infotainment host. When the theme interface of the instrument display needs to be switched, the instrument display firstly sends a theme interface switching request carrying the identifier to be switched to the target theme interface to the infotainment host. And then, after receiving the theme interface switching request, the infotainment host executes the switching operation of the video pictures in the theme interface according to the identification of the target theme interface, and after the switching operation is successfully executed, sends switching success information to the instrument display, and sends video picture data corresponding to the target theme interface to the instrument display. And finally, after the instrument display receives the switching success information and the video picture data corresponding to the target theme interface, switching the current theme interface to the target theme interface according to the own picture of the instrument display corresponding to the target theme interface and the received video picture data. The switching time sequence of the self-contained picture and the video picture in the theme interface of the instrument display is synchronized through message interaction so as to realize simultaneous switching of the self-contained picture and the video picture.

Further, before the video frame switching operation is executed, the infotainment host caches video frame data corresponding to the current theme interface, when the infotainment host fails to execute the video frame switching operation, switching failure information is sent to the instrument display, the cached video frame data corresponding to the current theme interface are obtained and sent to the instrument display, and therefore the instrument display keeps displaying the current theme interface based on the received video frame data after receiving the switching failure information and the video frame data corresponding to the current theme interface. By the mode, when the theme interface of the instrument display fails to be switched, the instrument display can keep the display of the current theme interface, the situation of disordered pictures is avoided, and the user experience is further improved.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a flow diagram illustrating a method for theme interface switching of an instrument display of an in-vehicle system according to an embodiment of the present invention;

FIG. 2a shows a schematic diagram of a dual-header theme interface, according to an embodiment of the invention;

FIG. 2b is a schematic diagram of a self-contained view of the meter display included in the dual-header theme interface shown in FIG. 2 a;

FIG. 2c is a schematic diagram of a video frame transmitted by the infotainment host to the meter display included in the dual head theme interface shown in FIG. 2 a;

FIG. 3a shows a schematic diagram of a single header topic interface in accordance with an embodiment of the invention;

FIG. 3b is a schematic diagram of a self-contained view of an instrument display included in the single header theme interface shown in FIG. 3 a;

FIG. 3c is a schematic diagram of a video frame transmitted by the infotainment host to the meter display included in the single header theme interface shown in FIG. 3 a;

FIG. 4a illustrates a schematic diagram of a custom theme interface, according to an embodiment of the invention;

FIG. 4b is a schematic diagram of a self-contained view of the instrument display included in the custom theme interface shown in FIG. 4 a;

FIG. 4c is a schematic diagram of a video frame transmitted by the infotainment host to the meter display included in the custom theme interface shown in FIG. 4 a;

FIG. 5a is a timing chart of a theme interface switching method of an instrument display of an in-vehicle system according to another embodiment of the present invention in case of successful video screen switching;

FIG. 5b shows a timing diagram of a theme interface switching method of an instrument display of an in-vehicle system in case of a video screen switching failure according to another embodiment of the present invention;

FIG. 6a is a schematic view of a dual header theme interface of the instrument display of the embodiment shown in FIG. 5;

FIG. 6b is a schematic diagram of a self-contained view of the meter display included in the dual header theme interface shown in FIG. 6 a;

FIG. 6c is a schematic diagram of a video frame transmitted by the infotainment host to the meter display included in the dual head theme interface shown in FIG. 6 a;

FIG. 7a is a schematic view of a single header theme interface of the instrument display of the embodiment shown in FIG. 5;

FIG. 7b is a schematic illustration of a self-contained view of an instrument display included in the single header theme interface shown in FIG. 7 a;

FIG. 7c is a schematic diagram of a video frame transmitted by the infotainment host to the meter display included in the single header theme interface shown in FIG. 7 a;

fig. 8 is a schematic structural diagram of an in-vehicle system according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be 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 disclosure to those skilled in the art.

In order to solve the technical problem, an embodiment of the present invention provides a theme interface switching method for an instrument display of a vehicle-mounted system. The vehicle-mounted system is a vehicle-mounted comprehensive information processing system formed by adopting a vehicle-mounted central processing unit and based on a vehicle body bus system and internet services. In-vehicle systems may generally include an instrument display and an infotainment host. The meter display is used to display a themed interface, which may generally include the own pictures of the meter display and the video pictures transmitted to the meter display by the infotainment host. The information entertainment host computer is in communication connection with the instrument display and is used for transmitting video picture data to the instrument display. The self-contained picture of the instrument display can display self-contained information such as vehicle instrument information, and the video picture displays media information transmitted to the instrument display by the infotainment host computer through video data streams. The theme interfaces of the instrument display are usually various, and when the instrument display needs to be switched among different theme interfaces, the picture style and the display mode of the own picture and the video picture of the instrument display need to be changed correspondingly.

Fig. 1 is a flowchart illustrating a theme interface switching method of an instrument display of an in-vehicle system according to an embodiment of the present invention. Referring to fig. 1, the method may include at least the following steps S102 to S108.

And S102, the instrument display sends a theme interface switching request carrying the identifier to be switched to the target theme interface to the infotainment host.

The identifier mentioned in this step may uniquely indicate the target subject interface, and may be, for example, a number, a name, and the like of the target subject interface.

And step S104, after receiving the theme interface switching request, the infotainment host executes the switching operation of the video pictures according to the identification of the target theme interface.

Specifically, the infotainment host determines a target theme interface to be switched to according to the identification of the target theme interface, prepares related video picture data according to a display mode (or called template) of a video picture corresponding to the target theme interface, and further performs an operation of switching the video picture of the current theme interface to the video picture of the target theme interface.

And S106, if the switching operation of the video pictures is successfully executed, the infotainment host sends switching success information to the instrument display, and sends video picture data corresponding to the target theme interface to the instrument display.

The switch success information referred to herein indicates that the infotainment host is ready to be switched to the video frame data corresponding to the target theme interface.

And S108, after receiving the switching success information and the video picture data corresponding to the target theme interface, the instrument display switches the current theme interface to the target theme interface according to the own picture corresponding to the target theme interface and the received video picture data, wherein the target theme interface is different from the current theme interface.

In the theme interface switching method for the instrument display of the vehicle-mounted system, when the theme interface of the instrument display needs to be switched, the instrument display firstly sends a theme interface switching request carrying the identifier to be switched to the target theme interface to the infotainment host. And then, after receiving the theme interface switching request, the infotainment host executes the switching operation of the video pictures in the theme interface according to the identification of the target theme interface, and after the switching operation is successfully executed, sends switching success information to the instrument display, and sends video picture data corresponding to the target theme interface to the instrument display. And finally, after the instrument display receives the switching success information and the video picture data corresponding to the target theme interface, switching the current theme interface to the target theme interface according to the own picture of the instrument display corresponding to the target theme interface and the received video picture data. The switching time sequence of the self-contained picture and the video picture in the theme interface of the instrument display is synchronized through message interaction so as to realize simultaneous switching of the self-contained picture and the video picture.

In the embodiment of the present invention, the communication manner between the meter display and the infotainment host is not particularly limited, and mainly depends on the connection manner between the meter display and the infotainment host. For example, if the meter display and the infotainment host are connected by a USB (Universal Serial Bus), a Socket communication mode may be used between them.

In some embodiments, communications between the meter display and the infotainment host are based on UART (Universal asynchronous Receiver/Transmitter). The UART is a general purpose serial data bus used for asynchronous communications. It converts data to be transmitted between serial communication and parallel communication. As a chip for converting a parallel input signal into a serial output signal, the UART is usually integrated into a connection of other communication interfaces. The UART has a simple structure, uses only two wires, and does not require a clock signal. Therefore, the instrument display and the information entertainment host machine communicate based on the UART in the switching process, and the theme interface can be switched more smoothly.

In practical applications, the infotainment host typically transmits video data streams to the meter display via LVDS, i.e., the infotainment host and the meter display are physically connected via an LVDS interface. In this case, if additional physical interfaces are added to connect between the infotainment host and the meter display, significant costs are incurred. Therefore, a virtual UART channel can be opened on the existing LVDS interface, so that the infotainment host and the instrument display can communicate through a local interconnect network (LIN Over LVDS) protocol based on a low-voltage differential signal, and UART communication is realized. LIN (Local Interconnect Network) is a low-cost serial communication Network defined for automotive distributed electronic systems. The LIN bus is based on an asynchronous serial communication data format, adopts a single master controller/multiple slave device mode, and is a special case in UART. By the method, the switching effect of the theme interface can be ensured without sacrificing cost.

In some embodiments, the current subject interface and the target subject interface may each be selected from one of:

a single header theme interface, a double header theme interface, and a custom theme interface.

The header referred to herein refers to a virtual display image of the dashboard of the automobile, and header information may generally include vehicle speed, transmitter speed, mileage, and the like.

FIG. 2a shows a schematic diagram of a dual header theme interface, according to an embodiment of the invention. FIG. 2b is a schematic diagram of a self-contained view of the meter display included in the dual-header theme interface shown in FIG. 2 a. FIG. 2c is a schematic diagram of video frames transmitted by the infotainment host to the meter display included in the dual head theme interface shown in FIG. 2 a. Referring to fig. 2a to 2c, the double-header theme interface includes two headers represented by circles, where the two headers respectively display vehicle instrument information 1 and vehicle instrument information 2, and the two headers form an own picture of the instrument display. The video pictures transmitted by the infotainment host to the instrument display at least one media information: media information 1, media information 2, …, and media information n (n is a natural number equal to or greater than 1). It should be noted that the shapes of the headers, the number and arrangement of the media information, the positions of the headers and the media information in the theme interface, and the like shown in fig. 2a to 2c are only exemplary, and the double-header theme interface may have many other forms as long as it includes two headers and at least one frame of the media information. In addition, those skilled in the art will appreciate that vehicle meter information displayed in other forms besides a header may also be included in the dual header theme interface, which together with the two headers constitute the own picture of the meter display.

FIG. 3a shows a schematic diagram of a single header theme interface, according to an embodiment of the invention. FIG. 3b is a schematic diagram of a self-contained view of an instrument display included in the single header theme interface shown in FIG. 3 a. FIG. 3c is a schematic diagram of a video frame transmitted by the infotainment host to the meter display included in the single header theme interface shown in FIG. 3 a. Referring to fig. 3a to 3c, the single header theme interface includes a header indicated by a circle, which displays the vehicle meter information 3, and other vehicle meter information (e.g., the vehicle meter information 4) is displayed in a form other than the header. The meter head and other vehicle meter information displayed on the single-meter-head theme interface form a self-contained picture of the meter display. The video pictures transmitted by the infotainment host to the instrument display at least one media information: media information 1, media information 2, …, and media information n (n is a natural number equal to or greater than 1). It should be noted that the shapes of the headers, the number and arrangement of other vehicle meter information displayed in a form other than the header, the number and arrangement of media information, the header, the other vehicle meter information, and the positions of the media information in the theme interface, etc. shown in fig. 3a to 3c are only exemplary, and the single header theme interface may have many other forms as long as it includes a header and a picture of at least one media information.

FIG. 4a illustrates a schematic diagram of a custom theme interface, according to an embodiment of the invention. FIG. 4b is a diagram illustrating a self-contained view of the instrument display included in the custom theme interface shown in FIG. 4 a. FIG. 4c is a schematic diagram of a video frame transmitted by the infotainment host to the meter display included in the custom theme interface shown in FIG. 4 a. Referring to fig. 4a to 4c, at least one type of vehicle meter information (e.g., vehicle meter information 5 and vehicle meter information 6) is displayed in a form other than the header, constituting the own screen of the meter display. The video pictures transmitted by the infotainment host computer to the instrument display various media information: media information 1, media information 2, …, and media information n (n is a natural number equal to or greater than 1). It should be noted that the number, display form and arrangement form of the vehicle meter information, the number and arrangement form of the media information, and the position of the vehicle meter information and the media information in the theme interface shown in fig. 4a to 4c are only exemplary, and those skilled in the art will understand that the custom theme interface may have many other forms as long as it is different from the single-header theme interface and the double-header theme interface. For example, a custom theme interface may also include three or more headers and at least one frame of media information.

The foregoing describes various thematic interface forms for instrument displays. In the theme interface of the instrument display, the own picture of the instrument display can display at least one piece of vehicle instrument information, such as vehicle speed, engine speed, coolant temperature, fuel quantity, mileage (such as total mileage, single mileage and the like), engine oil pressure, battery capacity and the like. The video frame transmitted from the infotainment host computer to the instrument display can display at least one of the following media information, such as navigation information, multimedia information, telephone information (such as Bluetooth telephone) and the like. The multimedia information may include audio (e.g., music), video, pictures, and the like.

In some embodiments, after the infotainment host receives the theme interface switch request and before performing the switching operation of the video picture according to the identification of the target theme interface, the infotainment host may also return a first acknowledgement message (Ack) to the meter display indicating that the theme interface switch request has been successfully received. After receiving the theme interface switching request, the infotainment host feeds back a confirmation message to the instrument display, and the instrument display learns that the theme interface switching signal is successfully sent to the infotainment host through message interaction, so that the infotainment host is more beneficial to sequential timing synchronization of subsequent theme interface switching.

Further, in some embodiments, if the first confirmation message is not received by the meter display within a first predetermined time after the theme interface switch request is sent, the theme interface switch request is resent to the infotainment host. By the mode, the theme interface switching request can be sent to the infotainment host, and the switching non-response caused by the fact that the infotainment host cannot successfully receive the theme interface switching request is avoided, so that the switching success rate is improved. The first predetermined time may be set according to the performance of the vehicle-mounted system and the actual response speed requirement, for example, within the range of 150 ms and 250 ms. Typically, the first predetermined time may be set to 200 ms.

In addition, after the instrument display sends the theme interface switching request each time, the total sending times of the theme interface switching request in the theme interface switching process can be recorded, if the total sending times of the theme interface switching request reaches the preset times (for example, set to 3 times), the instrument display still does not receive the first confirmation message, that is, the information entertainment host cannot receive the theme interface switching request sent by the instrument display, the instrument display keeps displaying the current theme interface unchanged, and the theme interface switching process is ended.

In some embodiments, after the infotainment host sends the switch-success information to the meter display and before sending the video picture data corresponding to the target subject interface to the meter display, the infotainment host may also receive a second confirmation message sent by the meter display in response to the switch-success information. That is, after the infotainment host sends the switch success information to the meter display, the meter display receives the switch success information and, in response to the switch success information, feeds back a second confirmation message to the infotainment host, the second confirmation message indicating that the switch success information sent by the infotainment host has been successfully received by the meter display. The instrument display feeds back the confirmation message to the information entertainment host after receiving the switching success message, and the information entertainment host acquires the switching success message through message interaction and successfully sends the switching success message to the instrument display, so that the instrument display is more beneficial to the time sequence synchronization of the subsequent theme interface switching.

Further, in some embodiments, the switch success message is resent to the meter display if the infotainment host does not receive the second confirmation message within a second predetermined time after sending the switch success message. By the method, the switching success information can be sent to the instrument display, so that the instrument display is ready to receive the video image data corresponding to the target theme interface and switch the theme interface, and the switching success rate is improved. The second predetermined time may be set according to the performance of the vehicle-mounted system and the actual response speed requirement, for example, within the range of 150 and 250 ms. Typically, the second predetermined time may be set to 200 ms.

In addition, after the infotainment host sends the switching success information to the instrument display each time, the total sending times of the switching success information in the theme interface switching process can be recorded, if the total sending times of the switching success information reaches the preset times (for example, set to 3 times), the infotainment host still does not receive the second confirmation message returned by the instrument display, that is, the instrument display cannot receive the switching success information sent by the infotainment host, the instrument display defaults to keep the current theme interface unchanged, and the theme interface switching process is ended.

In other embodiments, after the infotainment host receives the theme interface switch request and before the infotainment host performs the video frame switching operation according to the identification of the target theme interface, the infotainment host may further cache video frame data corresponding to the current theme interface before switching, thereby ensuring that the infotainment host can rollback to the state before switching based on the cached video frame data before switching if the infotainment host fails to perform the video frame switching. The infotainment host may perform the step of caching the video picture data corresponding to the current subject interface concurrently with or after returning the first confirmation message to the meter display. After the instrument display finally and successfully switches the current theme interface to the target theme interface, the information entertainment host can release the video picture data cached before, and the utilization rate of the memory is improved.

In some embodiments, after the infotainment host caches the video image data corresponding to the current theme interface and performs the switching operation of the video images according to the identifier of the target theme interface, if the infotainment host fails to perform the switching operation of the video images, the infotainment host sends switching failure information to the meter display, acquires the cached video image data corresponding to the current theme interface and sends the video image data corresponding to the current theme interface to the meter display. Furthermore, after receiving the switching failure information and the video picture data corresponding to the current theme interface, the instrument display keeps displaying the current theme interface based on the received video picture data. By sending the switching failure information to the instrument display when the video frame switching of the infotainment host fails and sending the video frame data before switching cached in advance to the instrument display, the infotainment host can recover the video frame state before the switching failure, and the instrument display can keep the display of the current theme interface, thereby avoiding the situation of disordered frames when the theme interface switching fails, ensuring that a user only feels that the switching has no response and can not see the disordered interface, and further improving the user experience.

Additionally, in some embodiments, after the infotainment host sends the switch failure information to the meter display and before retrieving the cached video frame data corresponding to the current subject interface and sending the video frame data corresponding to the current subject interface to the meter display, the infotainment host may also receive a third confirmation message sent by the meter display in response to the switch failure information. That is, after the infotainment host transmits the handover failure information to the meter display, the meter display receives the handover failure information and feeds back a third confirmation message to the infotainment host in response to the handover failure information, the third confirmation message indicating that the meter display has successfully received the handover failure information transmitted by the infotainment host. The meter display feeds back a confirmation message to the infotainment host after receiving the switching failure information, and the infotainment host learns that the switching failure information is successfully sent to the meter display through message interaction.

Further, in some embodiments, the infotainment host resends the handover failure message to the meter display if the infotainment host does not receive the third confirmation message within a third predetermined time after sending the handover failure message. By the method, the switching failure information can be guaranteed to be sent to the instrument display, so that the instrument display is ready to receive the video picture data corresponding to the current theme interface and keep the current theme interface. The third predetermined time may be set according to the performance of the vehicle-mounted system and the actual response speed requirement, for example, within the range of 150 and 250 ms. Typically, the third predetermined time may be set to 200 ms.

In addition, after the infotainment host sends the switching failure information to the instrument display each time, the total sending times of the switching failure information in the theme interface switching process can be recorded, if the total sending times of the switching failure information reaches the preset times (for example, set to 3 times), the infotainment host still does not receive a third confirmation message returned by the instrument display, namely, the instrument display indicates that the instrument display cannot receive the switching failure information sent by the infotainment host, the instrument display defaults to keep the current theme interface unchanged, and the theme interface switching process is ended.

It should be noted that the first predetermined time, the second predetermined time and the third predetermined time are not related to each other, they may be the same or different, and the invention is not limited thereto.

In the above, various implementation manners of each link of the embodiment shown in fig. 1 are introduced, and an implementation process of the theme interface switching method of the instrument display of the vehicle-mounted system according to the present invention will be described in detail through a specific embodiment.

FIGS. 5a and 5b are timing diagrams illustrating a theme interface switching method for an instrument display of an in-vehicle system according to an embodiment of the present invention, where FIG. 5a shows a sequence of steps in a case where a video screen switching performed by an infotainment host is successful, and FIG. 5b shows a sequence of steps in a case where a video screen switching performed by an infotainment host is failed. In this embodiment, the instrument display needs to be switched from the double-header theme interface shown in fig. 6a to the single-header theme interface shown in fig. 7 a. In the dual head theme interface shown in fig. 6a, two heads respectively display the engine speed and mileage information, and the two heads form the own screen of the instrument display. The video picture transmitted to the instrument display by the infotainment host computer is positioned between the two meter heads and displays navigation, music and telephone information. Fig. 6b and 6c are schematic diagrams of an own picture of an instrument display included in the dual head theme interface shown in fig. 6a and a video picture transmitted to the instrument display by an infotainment host, respectively. In the single header theme interface shown in fig. 7a, a single header displays the engine speed, and is located in the middle of the single header theme interface. The mileage information is displayed in a form other than the gauge head, on the gauge head side. The meter head and the mileage information form the own picture of the instrument display. The video picture transmitted to the instrument display by the infotainment host computer is positioned at the other side of the meter head and displays navigation, music and telephone information. Fig. 7b and 7c are schematic diagrams of an own picture of an instrument display included in the single header theme interface shown in fig. 7a and a video picture transmitted to the instrument display by an infotainment host, respectively.

Referring to fig. 5a and 5b, the method of the present embodiment may include steps S502 to S522, in which communication between the meter display and the infotainment host is performed based on UART (LIN Over LVDS protocol).

In this embodiment, before starting to execute the theme interface switching method of the meter display, the meter display displays vehicle meter information including engine speed and mileage information, and media information including navigation, music, and telephone information in the current theme interface (i.e., the double-head theme interface shown in fig. 6 a). Accordingly, to achieve proper display on the meter display, the infotainment host needs to prepare multiple frames including video frames included in the dual header theme interface shown in fig. 6c, video frames included in the single header theme interface shown in fig. 7c, and video frames included in other theme interfaces (e.g., custom theme interfaces). The infotainment host puts the video picture corresponding to the current theme interface (i.e. the video picture included in the double-header theme interface shown in fig. 6 c) on the uppermost layer for display, and puts other video pictures on the lower layer for hiding according to the current theme interface displayed by the instrument display.

When the instrument display needs to be switched from the double-header theme interface shown in fig. 6a to the single-header theme interface shown in fig. 7a, the following steps are performed:

step S502, the instrument display sends a theme interface switching request carrying the identification to be switched to the target theme interface to the infotainment host.

In this embodiment, the target theme interface to be switched is the single-header theme interface shown in fig. 7 a.

Step S504, after receiving the theme interface switching request, the infotainment host returns a first confirmation message to the instrument display, and caches video picture data corresponding to the current theme interface.

The first confirmation message indicates that the infotainment host has successfully received the theme interface switch request from the meter display. And the instrument display can confirm that the theme interface switching request is successfully sent after receiving the first confirmation message.

If the meter display does not receive the first confirmation message within a first predetermined time (e.g., 200ms) after sending the theme interface switching request, the process returns to step S502, and the theme interface switching request is sent to the infotainment host again. If the first confirmation message returned by the information entertainment host is still not received after the instrument display sends the theme interface switching request to the information entertainment host for 3 times, the instrument display keeps the current theme interface unchanged, and the process is ended.

And the infotainment host caches the video picture data corresponding to the current theme interface at the same time or after returning the first confirmation message to the instrument display. In the present embodiment, specifically, the data of the video picture shown in fig. 6c is cached, including the display template of the video picture shown in fig. 6c and the related media information data (i.e. navigation, telephone and music information).

Step S506, the infotainment host executes the switching operation of the video pictures according to the identification of the target theme interface. If the switching operation is successfully performed, the step S508 is continuously performed. If the switching operation fails, the process goes to step S516.

Specifically, the infotainment host determines, according to the received theme interface switching request, that the theme interface to be switched to is the single-header theme interface shown in fig. 7a, prepares the relevant media information data (i.e., navigation, telephone and music information) according to the video picture shown in fig. 7c corresponding to the single-header theme interface shown in fig. 7a, and further performs the following switching operation: the video frame corresponding to the single header theme interface of fig. 7a shown in fig. 7c is moved to the uppermost layer, and the video frame corresponding to the double header theme interface of fig. 6a shown in fig. 6c is moved down for hiding. If the video frame shown in fig. 7c is successfully moved to the top layer, it indicates that the switching operation is successfully performed, otherwise, the switching operation fails to be performed.

Step S508, the infotainment host sends a switching success message to the meter display.

The switch success information indicates that the infotainment host has prepared the data of the video frame corresponding to the target theme interface (i.e., the video frame shown in fig. 7c in this embodiment) to be switched to.

And step S510, after the instrument display receives the switching success information, a second confirmation message is returned to the information entertainment host.

The second confirmation message indicates that the meter display has successfully received the switch success message sent by the infotainment host. And the infotainment host computer can confirm that the switching success information is successfully sent to the instrument display after receiving the second confirmation message.

If the infotainment host does not receive the second confirmation message within a second predetermined time (e.g., 200ms) after sending the switching success message, the process returns to step S508 to send the switching success message to the meter display again. If the information entertainment host computer sends the successful switching information to the instrument display for 3 times, the second confirmation message returned by the instrument display is still not received, namely the successful switching information of the information entertainment host computer is not sent to the instrument display, the instrument display keeps the current theme interface unchanged, and the process is ended.

And step S512, after receiving the second confirmation message, the infotainment host sends video picture data corresponding to the target theme interface to the instrument display.

In the present embodiment, specifically, the data of the video screen shown in fig. 7c (including the display template of the video screen shown in fig. 7c and the associated navigation, telephone, and music information) is transmitted to the meter display.

Step S514, after the instrument display receives the video picture data corresponding to the target theme interface, the current theme interface is switched to the target theme interface according to the own picture corresponding to the target theme interface and the received video picture data, and the theme interface switching process is finished.

Specifically, after receiving the video frame (i.e., the video frame shown in fig. 7 c) data corresponding to the target subject interface, the instrument display hides the video frame shown in fig. 7c, and then changes the self-contained frame (i.e., the self-contained frame of the instrument display in the double-header subject interface shown in fig. 6 b) of the instrument display in the current subject interface into the self-contained frame (i.e., the self-contained frame of the instrument display in the single-header subject interface shown in fig. 7 b) of the instrument display in the target subject interface. And after the switching of the self-image of the instrument display is finished, the instrument display displays the video image shown in the figure 7c, so that the switching of the theme interface is finished successfully, and the seamless combination of the self-image and the video image in the theme interface of the instrument display is realized.

In step S516, the infotainment host sends a switch failure message to the meter display.

And step S518, after receiving the switching failure information, the instrument display returns a third confirmation message to the infotainment host.

The third confirmation message indicates that the meter display has successfully received the switch failure message sent by the infotainment host. And the infotainment host computer can confirm that the switching failure information is successfully sent to the instrument display after receiving the third confirmation message.

If the infotainment host does not receive the third confirmation message within a third predetermined time (e.g., 200ms) after sending the switch failure message, the process returns to step S516 to send the switch failure message to the meter display again. If the information entertainment host computer still does not receive the third confirmation message returned by the instrument display after sending the switching failure information to the instrument display for 3 times, namely the switching failure information of the information entertainment host computer is not sent to the instrument display, the instrument display keeps the current theme interface unchanged, and the process is ended.

Step S520, after receiving the third confirmation message, the infotainment host acquires the cached video frame data corresponding to the current theme interface and sends the video frame data corresponding to the current theme interface to the instrument display.

Specifically, the infotainment host extracts the data of the video picture shown in fig. 6c corresponding to the double-header theme interface of fig. 6a from the buffer area to replace the video picture shown in fig. 6c at the uppermost layer (i.e., the infotainment host resumes the state before the video picture switching operation), and transmits the extracted data of the video picture shown in fig. 6c corresponding to the double-header theme interface of fig. 6a to the meter display.

In step S522, after the instrument display receives the video frame data corresponding to the current theme interface, the current theme interface is kept displayed based on the received video frame data, and the theme interface switching process is ended.

Specifically, the meter display still maintains the own picture of the meter display in the dual header theme interface shown in fig. 6b, and displays the video picture in the dual header theme interface shown in fig. 6 c. That is, the meter display still remains displaying the dual header theme interface shown in fig. 6 a. Thus, even if the switching of the theme interface fails, the user only feels that the switching is not responded, and the situation that the picture of the theme interface is disordered can not occur.

In the embodiment, through a UART message interaction mode combining video and messages, rapid switching can be realized under the condition that the theme interface is successfully switched, the display mode is reasonable after switching is ensured, the display of the current theme interface can be kept by the instrument display under the condition that the theme interface is failed to be switched, the condition of disordered pictures is avoided, and therefore the user experience is greatly improved.

Based on the same inventive concept, the embodiment of the invention also provides a vehicle-mounted system. Fig. 8 is a schematic structural diagram of the in-vehicle system 100 according to an embodiment of the invention. Referring to fig. 8, the in-vehicle system 100 may include at least: a meter display 110, and an infotainment host 120. The meter display 110 is used to display a theme interface that includes the own pictures of the meter display 110 and the video pictures transmitted to the meter display 110 by the infotainment host 120. The infotainment host 120 is communicatively coupled to the meter display 110 for transmitting video picture data to the meter display 110. When the theme interface of the instrument display 110 needs to be switched, the vehicle-mounted system 100 implements switching of the theme interface of the instrument display 110 by executing the theme interface switching method of the instrument display of the vehicle-mounted system of any of the above embodiments or a combination thereof.

According to any one or a combination of multiple optional embodiments, the embodiment of the present invention can achieve the following advantages:

in the theme interface switching method for the instrument display of the vehicle-mounted system, the theme interface of the instrument display comprises the own picture of the instrument display and the video picture transmitted to the instrument display by the infotainment host. When the theme interface of the instrument display needs to be switched, the instrument display firstly sends a theme interface switching request carrying the identifier to be switched to the target theme interface to the infotainment host. And then, after receiving the theme interface switching request, the infotainment host executes the switching operation of the video pictures in the theme interface according to the identification of the target theme interface, and after the switching operation is successfully executed, sends switching success information to the instrument display, and sends video picture data corresponding to the target theme interface to the instrument display. And finally, after the instrument display receives the switching success information and the video picture data corresponding to the target theme interface, switching the current theme interface to the target theme interface according to the own picture of the instrument display corresponding to the target theme interface and the received video picture data. The switching time sequence of the self-contained picture and the video picture in the theme interface of the instrument display is synchronized through message interaction so as to realize simultaneous switching of the self-contained picture and the video picture.

Further, before the video frame switching operation is executed, the infotainment host caches video frame data corresponding to the current theme interface, when the infotainment host fails to execute the video frame switching operation, switching failure information is sent to the instrument display, the cached video frame data corresponding to the current theme interface are obtained and sent to the instrument display, and therefore the instrument display keeps displaying the current theme interface based on the received video frame data after receiving the switching failure information and the video frame data corresponding to the current theme interface. By the mode, when the theme interface of the instrument display fails to be switched, the instrument display can keep the display of the current theme interface, the situation of disordered pictures is avoided, and the user experience is further improved.

It is clear to those skilled in the art that the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and for the sake of brevity, further description is omitted here.

In addition, the functional units in the embodiments of the present invention may be physically independent of each other, two or more functional units may be integrated together, or all the functional units may be integrated in one processing unit. The integrated functional units may be implemented in the form of hardware, or in the form of software or firmware.

Those of ordinary skill in the art will understand that: the integrated functional units, if implemented in software and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computing device (e.g., a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention when the instructions are executed. And the aforementioned storage medium includes: u disk, removable hard disk, Read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disk, and other various media capable of storing program code.

Alternatively, all or part of the steps of implementing the foregoing method embodiments may be implemented by hardware (such as a computing device, e.g., a personal computer, a server, or a network device) associated with program instructions, which may be stored in a computer-readable storage medium, and when the program instructions are executed by a processor of the computing device, the computing device executes all or part of the steps of the method according to the embodiments of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can be modified or some or all of the technical features can be equivalently replaced within the spirit and principle of the present invention; such modifications or substitutions do not depart from the scope of the present invention.