CN115426518B - Display control system, image display method and LED display control system - Google Patents

Display control system, image display method and LED display control system Download PDF

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Publication number
CN115426518B
CN115426518B CN202210958488.3A CN202210958488A CN115426518B CN 115426518 B CN115426518 B CN 115426518B CN 202210958488 A CN202210958488 A CN 202210958488A CN 115426518 B CN115426518 B CN 115426518B
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Prior art keywords
video controller
port
video
broadcast message
type
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CN115426518A (en
Inventor
樊灵飞
李锦坤
熊增辉
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Hangzhou Hikvision Digital Technology Co Ltd
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Hangzhou Hikvision Digital Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/482—End-user interface for program selection

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The application provides a display control system, an image display method and an LED display control system, wherein the display control system comprises a video display and a plurality of video controllers, the video controllers are connected in series, and aiming at each video controller, the video controllers are used for acquiring display area information corresponding to the video display, and a plurality of display areas of the video display are determined based on the display area information; determining a position identifier corresponding to the video controller, and determining a target display area corresponding to the video controller from a plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence; dividing a sub-image matched with a target display area from an image to be displayed, and displaying the sub-image in the target display area; and the video display is used for displaying each sub-image of the image to be displayed. By the scheme of the application, the user is not required to log in each video controller in sequence to perform configuration, and the configuration workload of the user is reduced.

Description

Display control system, image display method and LED display control system
Technical Field
The present application relates to the field of image processing, and in particular, to a display control system, an image display method, and an LED display control system.
Background
The display control system comprises a network switch, a video display and a plurality of video controllers (because the display screen of the LED (Light Emitting Diode, light emitting diode) of the video display is large, the plurality of video controllers are required to jointly display images to the video display), the network switch is connected with a host computer in an uplink mode, connected with the plurality of video controllers in a downlink mode, and connected to the video display in a reconnection mode. The computer host accesses each video controller to perform configuration operation through the network, so as to realize image display of the video display.
In the above manner, a complex network switching scenario needs to be built, for example, a network switch needs to be deployed, and a maintenance process of the network switch needs to be additionally added, that is, not only a maintenance process of a plurality of video controllers but also a maintenance process of the network switch needs to be performed, which results in a more complex maintenance process.
In addition, when performing the maintenance process of a plurality of video controllers, a user is required to log in to each video controller in turn, configure the video controller, the configuration workload is large, and the maintenance process time is long.
Disclosure of Invention
The application provides a display control system, which comprises a video display and a plurality of video controllers, wherein the video controllers are connected in series, and the display control system comprises:
for each video controller, the video controller is configured to acquire display area information corresponding to the video display, and determine a plurality of display areas of the video display based on the display area information; determining a position identifier corresponding to the video controller, and determining a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence; dividing a sub-image matched with the target display area from the image to be displayed, and displaying the sub-image in the target display area;
the video display is used for displaying each sub-image of the image to be displayed.
The application provides an image display method, a display control system comprises a video display and a plurality of video controllers, wherein the video controllers are connected in series, and the method comprises the following steps:
For each video controller, the video controller acquires display area information corresponding to the video display, and determines a plurality of display areas of the video display based on the display area information;
the video controller determines a position identifier corresponding to the video controller, and determines a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence;
the video controller divides a sub-image matched with the target display area from an image to be displayed;
the video controller displays the sub-image in the target display area.
The application provides an LED display control system, which comprises an LED display and a plurality of video controllers, wherein the video controllers are connected in series, and the LED display control system comprises:
for each video controller, the video controller is configured to acquire display area information corresponding to the LED display, and determine a plurality of display areas of the LED display based on the display area information; determining a position identifier corresponding to the video controller, and determining a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence; dividing a sub-image matched with the target display area from the image to be displayed, and displaying the sub-image in the target display area;
And the LED display is used for displaying each sub-image of the image to be displayed.
As can be seen from the above technical solutions, in the embodiment of the present application, the display control system includes a video display and a plurality of video controllers, where the plurality of video controllers are directly connected in a serial manner, so that a complex network switching scenario does not need to be built, i.e., a network switch does not need to be deployed, only a maintenance process of the plurality of video controllers is needed, a maintenance process of the network switch does not need to be performed, and the maintenance process is simplified. When the maintenance process of the video controllers is carried out, the video controllers can be configured in an interactive mode, a user is not required to log in to each video controller in sequence to configure the video controllers, the configuration workload of the user is reduced, and the time consumed in the maintenance process is reduced. For example, the plurality of video controllers can determine the target display area corresponding to the video controller in an interactive manner, so that a sub-image matched with the target display area can be divided from the image to be displayed, and the sub-image can be displayed in the target display area.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly describe the drawings required to be used in the embodiments of the present application or the description in the prior art, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings of the embodiments of the present application for a person having ordinary skill in the art.
FIG. 1 shows a schematic configuration of a control system;
FIG. 2 is a schematic diagram of a display control system according to an embodiment of the present application;
FIGS. 3A-3C are schematic diagrams illustrating the division of display regions according to an embodiment of the present application;
FIG. 4 is a flow chart of an image display method according to an embodiment of the present application;
FIGS. 5A and 5B are schematic diagrams of the structure of a video controller according to an embodiment of the present application;
fig. 6 is a flowchart of an image display method according to an embodiment of the present application.
Detailed Description
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to any or all possible combinations including one or more of the associated listed items.
It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. Depending on the context, furthermore, the word "if" used may be interpreted as "at … …" or "at … …" or "in response to a determination".
Before the technical scheme of the embodiment of the application is introduced, technical terms related to the application are introduced.
Port isolation: the port isolation is used for realizing the isolation between two layers of data, and the isolation between the two layers of data can be realized based on the isolation group only by adding different ports into the isolation group, namely, the two layers of data can be transmitted between the ports in the same isolation group, and the two layers of data cannot be transmitted between the ports in different isolation groups. The port isolation function can provide a safer and more flexible networking scheme for users.
Two layers of data: the two-layer data is data of the second layer (i.e., data link layer) of the OSI reference model.
Network Switch (Switch): the network switch works in the data link layer for forwarding of two-layer data between different ports, that is, the network switch is a device for forwarding data.
MAC (Media Access Control, medium access control) layer: the MAC layer is located in the lower half of the data link layer in the OSI reference model, and is mainly responsible for controlling and interfacing with the physical layer. When the MAC layer transmits data, the MAC layer can judge whether the data can be transmitted or not, if so, the MAC layer adds some control information to the data, and finally, the data and the control information are transmitted to the physical layer in a specified format. When the MAC layer receives data, the MAC layer firstly judges whether the input information has transmission errors, and if the input information has no transmission errors, the MAC layer removes control information and sends the control information to an LCC (Logical Link Control, logic link control) layer.
PHY (Physical, physical layer): the physical layer is a physical interface transceiver for implementing a physical layer protocol. When the physical layer transmits data, the physical layer receives the data from the MAC layer, converts the parallel data into serial stream data, encodes the data according to the encoding rule of the physical layer, and then converts the data into analog signals to transmit the data. When the physical layer receives data, the processing flow of the physical layer is opposite to the flow of data transmission.
MDI (Medium Dependent Interface ): MDI is the lowest layer of the physical layer, and 4 pairs of bidirectional differential lines form a high-speed signal, so that long-distance transmission of network signals can be realized.
Referring to fig. 1, a schematic diagram of a display control system is shown, where the display control system may include a network switch, a video display, and a plurality of video controllers, the network switch being connected to a host computer in an upstream direction and connected to the plurality of video controllers in a downstream direction, and the plurality of video controllers being connected to the video display. The computer host accesses each video controller to perform configuration operation through the network, so as to realize image display of the video display. However, in the above manner, a complex network switching scenario needs to be built, for example, a network switch needs to be deployed, and a maintenance process of the network switch is additionally added, which results in a more complex maintenance process. In addition, when performing the maintenance process of a plurality of video controllers, a user is required to log in to each video controller in turn, configure the video controller, the configuration workload is large, and the maintenance process time is long.
In view of the above findings, the embodiments of the present application provide a network cascading technique of a video controller, where a display control system includes a video display and a plurality of video controllers, where the plurality of video controllers are directly connected in a serial manner (that is, the plurality of video controllers are directly connected in a serial manner, that is, the plurality of video controllers are connected in a network linear cascading manner), so that a complex network switching scenario does not need to be built, that is, a network switch does not need to be deployed, so that a maintenance process of the network switch does not need to be performed, and a maintenance process of the display control system is simplified.
The plurality of video controllers are directly connected in a serial manner, that is, the control signals of the plurality of video controllers are directly connected in a serial manner, and the video signals of the plurality of video controllers are directly connected in a serial manner, that is, the control signals and the video signals are sequentially transmitted through each video controller.
Referring to fig. 2, a schematic structure of a display control system is shown, where the display control system may include 4 video controllers (such as a transmitting card controller), and of course, only 4 video controllers are illustrated here as an example, and in practical application, the number of video controllers may be greater or less.
Referring to fig. 2, the 4 video controllers are directly connected in series, for example, the video controller 21 is connected to the video controller 22, the video controller 22 is connected to the video controller 23, and the video controller 23 is connected to the video controller 24. The video controller 22 serves as a downstream video controller of the video controller 21, the video controller 23 serves as a downstream video controller of the video controller 22, and the video controller 24 serves as a downstream video controller of the video controller 23. The video controller 21 serves as an upstream video controller of the video controller 22, the video controller 22 serves as an upstream video controller of the video controller 23, and the video controller 23 serves as an upstream video controller of the video controller 24. Obviously, for each video controller, there is at most one upstream video controller and at most one downstream video controller. For the first video controller, there is no upstream video controller, and for the last video controller, there is no downstream video controller.
For example, for multiple video controllers, the video controllers may be independent video controllers deployed in a distributed fashion, i.e., each video controller is independently deployed. Alternatively, these video controllers may be deployed within a video display. Of course, the above is only two examples.
For example, for each video controller, the video controller may be connected to a video display, which may be an LCD tiled display or an LED tiled display. For example, the video display may be composed of a plurality of display devices, such as 4 display devices for the application scenario shown in fig. 2, and thus, the video controller 21, the video controller 22, the video controller 23, and the video controller 24 may be connected to one display device, respectively, i.e., the video controller 21, the video controller 22, the video controller 23, and the video controller 24 may be connected to the video display. Of course, the above is only an example of a connection manner, and is not limited thereto, as long as the video controller is connected to the video display.
For example, the video controller 21 may be connected to a first display device of the video display, the video controller 21 may display the image to the first display device when displaying the image, and so on.
In this scenario, when the video display displays a frame of picture, the picture may be divided into 4 display areas, where the first display device is used for corresponding to display area 1, the second display device is used for corresponding to display area 2, the third display device is used for corresponding to display area 3, and the fourth display device is used for corresponding to display area 4, so that the display area 1, display area 2, display area 3, and display area 4 form the complete picture, and when the four display devices display 4 display areas, a frame of complete picture is displayed on the video display.
In this scenario, the video controller 21 connected to the first display device needs to divide the sub-image 1 corresponding to the display area 1 from the image to be displayed (i.e., the full image), so that the sub-image 1 is displayed on the first display device, i.e., the sub-image 1 is a component of a complete picture. The video controller 22 connected to the second display device needs to divide the sub-image 2 corresponding to the display area 2 from the image to be displayed, so that the sub-image 2 is displayed on the second display device, that is, the sub-image 2 is a component of one frame of the complete picture. The video controller 23 connected to the third display device needs to divide the sub-image 3 corresponding to the display area 3 from the image to be displayed, so that the sub-image 3, that is, the sub-image 3, is displayed on the third display device as a component of one frame of the complete picture. The video controller 24 connected to the fourth display device needs to divide the sub-image 4 corresponding to the display area 4 from the image to be displayed, so that the sub-image 4 is displayed on the fourth display device, i.e. the sub-image 4 is a component of one complete picture. In summary, the sub-image 1, the sub-image 2, the sub-image 3 and the sub-image 4 together form a complete frame, that is, the image to be displayed.
Referring to fig. 3A, an example of 4 display areas of a video display is shown, where the 4 display areas are 2×2 display areas, and the whole of the 4 display areas corresponds to one complete frame of the video display. The display area 1 is a display area in the lower left corner, and the video controller 21 needs to know coordinate information (e.g., 4 vertex coordinates, or 1 vertex coordinate+length and width of the display area 1) of the display area 1, and divide the sub-image 1 corresponding to the display area 1 from the image to be displayed based on the coordinate information, that is, the coordinate information of the sub-image 1 matches the coordinate information of the display area 1, so that the sub-image 1 is displayed on the display area 1. The display area 2 is the display area in the lower right corner, and the video controller 22 needs to know the coordinate information of the display area 2, and divide the sub-image 2 corresponding to the display area 2 from the image to be displayed based on the coordinate information, so that the sub-image 2 is displayed on the display area 2. The display area 3 is the display area in the upper right corner, and the video controller 23 needs to know the coordinate information of the display area 3, and divide the sub-image 3 corresponding to the display area 3 from the image to be displayed based on the coordinate information, so that the sub-image 3 is displayed on the display area 3. The display area 4 is the display area in the upper left corner, and the video controller 24 needs to know the coordinate information of the display area 4, and divide the sub-image 4 corresponding to the display area 4 from the image to be displayed based on the coordinate information, so that the sub-image 4 is displayed on the display area 4.
Referring to fig. 3B, an example of 4 display areas of a video display is shown, where the 4 display areas are the display areas of 4*1 (i.e., the display areas of 1 row and 4 column). The display area 1 is the first display area on the left side, and the video controller 21 needs to know the coordinate information of the display area 1. The display area 2 is the second display area on the left side, and the video controller 22 needs to know the coordinate information of the display area 2. The display area 3 is the third display area on the left side, and the video controller 23 needs to know the coordinate information of the display area 3. The display area 4 is the first display area on the right, and the video controller 24 needs to know the coordinate information of the display area 4.
Referring to fig. 3C, an example of 4 display areas of a video display is shown, where the 4 display areas are the display areas of 1*4 (i.e., the display areas of 4 rows and 1 column). The display area 1 is the first display area on the lower side, and the video controller 21 needs to know the coordinate information of the display area 1. The display area 2 is the lower second display area, and the video controller 22 needs to know the coordinate information of the display area 2. The display area 3 is the lower third display area, and the video controller 23 needs to know the coordinate information of the display area 3. The display area 4 is the upper first display area, and the video controller 24 needs to know the coordinate information of the display area 4.
In one possible implementation, in order for the video controller 21 to learn the coordinate information of the display area 1, the video controller 22 to learn the coordinate information of the display area 2, the video controller 23 to learn the coordinate information of the display area 3, and the video controller 24 to learn the coordinate information of the display area 4, a user may log in to each video controller in turn, and configure the video controller, which has a large configuration workload and consumes a relatively long time. For example, the user logs in to the video controller 21, the coordinate information of the display area 1 is arranged in the video controller 21, the user logs in to the video controller 22, the coordinate information of the display area 2 is arranged in the video controller 22, the user logs in to the video controller 23, the coordinate information of the display area 3 is arranged in the video controller 23, the user logs in to the video controller 24, and the coordinate information of the display area 4 is arranged in the video controller 24.
In view of the above findings, in the embodiment of the present application, a plurality of video controllers may be configured in an interactive manner, without requiring a user to log in to each video controller in turn to configure the video controller, thereby reducing the workload of user configuration and reducing the time consumption in the configuration process. For example, the plurality of video controllers may interactively make the video controller 21 obtain the coordinate information of the display area 1, make the video controller 22 obtain the coordinate information of the display area 2, make the video controller 23 obtain the coordinate information of the display area 3, and make the video controller 24 obtain the coordinate information of the display area 1.
The technical scheme of the embodiment of the application is described below with reference to specific embodiments.
The embodiment of the application provides an image display method, a display control system comprises a video display and a plurality of video controllers, and the video controllers are connected in series. Referring to fig. 4, a flow chart of an image display method is shown, the method may be applied to each video controller, the processing flow of each video controller is the same, and a video controller is taken as an example for explanation, and the method may include:
step 401, the video controller obtains display area information corresponding to the video display, and determines a plurality of display areas of the video display based on the display area information, wherein the number of the display areas is the same as that of the video controller.
Step 402, the video controller determines a location identifier corresponding to the video controller, and determines a target display area corresponding to the video controller from the plurality of display areas based on the location identifier. For example, the location identifications corresponding to the plurality of video controllers may be sequentially changed in the order of the series connection.
Step 403, the video controller divides the sub-image matched with the target display area from the image to be displayed, and displays the sub-image in the target display area.
In a possible implementation manner, the above procedure is described in conjunction with fig. 3B, and the implementation manners of fig. 3A and fig. 3C are similar, so that a detailed description is not repeated here. As shown in fig. 3B, the display area information may include, but is not limited to: line and column information and trace information. The row and column information is used to indicate that all display areas are 1 row and 4 column display areas, the trace information is used to indicate that the first display area on the left side is display area 1, the second display area on the left side is display area 2, the third display area on the left side is display area 3, and the first display area on the right side (i.e., the fourth display area on the left side) is display area 4, which is merely an example of the trace information, and the trace information is not limited as long as the trace information can indicate the positional relationship of all display areas.
For each video controller, after obtaining the display area information, the video controller may determine 4 display areas of the video display based on the display area information. For example, since the row and column information represents 4 display areas of 1 row and 4 columns, and the size of each display area is the same, the video controller may divide the complete area of the video display into 4 display areas of the same size, and the 4 display areas are 4 display areas of 1 row and 4 columns, that is, the 4 display areas of the video display are obtained.
For each video controller, a target display area corresponding to the video controller can be determined from all display areas based on the position identifier corresponding to the video controller and the display area information (such as routing information). For example, the location identifier corresponding to the video controller 21 is 1, which indicates that the video controller 21 is the 1 st video controller (corresponding to the display area 1 is needed) among all the video controllers, and the routing information indicates that the first left display area is the display area 1, so that the video controller 21 determines that the target display area is the first left display area. The location identifier corresponding to the video controller 22 is 2, which indicates that the video controller 22 is the 2 nd video controller (corresponding to the display area 2 is required) among all the video controllers, and the trace information indicates that the second display area on the left side is the display area 2, so that the video controller 22 determines that the target display area is the second display area on the left side. Similarly, the video controller 23 determines that the target display area is the third display area on the left side, and the video controller 24 determines that the target display area is the first display area on the right side.
The video controller 21 divides the sub-image 1 matching the display area 1 from the image to be displayed (i.e., the full image), and displays the sub-image 1 in the display area 1 of the video display. The video controller 22 divides the sub-image 2 matching the display area 2 from the image to be displayed, and displays the sub-image 2 in the display area 2 of the video display. The video controller 23 divides the sub-image 3 matching the display area 3 from the image to be displayed, and displays the sub-image 3 in the display area 3 of the video display. The video controller 24 divides the sub-image 4 matching the display area 4 from the image to be displayed, and displays the sub-image 4 in the display area 4 of the video display.
In one possible implementation, for each video controller, a previous video controller of the present video controller may be determined based on an order of series connection of the plurality of video controllers; determining a position identifier corresponding to the video controller based on the position identifier corresponding to the previous video controller; the position identifier corresponding to the video controller is the sum of the position identifier corresponding to the previous video controller and a preset value (which can be configured according to experience, such as 1, 2, 3, etc., and is illustrated by taking 1 as an example later); or the position identifier corresponding to the video controller is the difference between the position identifier corresponding to the previous video controller and the preset value.
For example, for the video controller 21, based on the serial connection order of the plurality of video controllers, determining that the previous video controller of the video controller 21 is empty may determine that the location identifier corresponding to the video controller 21 is a default value, such as 1, 2, 3, and the like, taking the location identifier as 1 as an example. For the video controller 22, based on the serial connection order of the plurality of video controllers, it is determined that the previous video controller of the video controller 22 is the video controller 21, the position identifier corresponding to the video controller 22 is the sum of the position identifier 1 corresponding to the video controller 21 and the preset value 1, that is, the position identifier 2, and so on, the position identifier corresponding to the video controller 23 is 3, and the position identifier corresponding to the video controller 24 is 4.
In the above example, the position mark 1 indicates that the video controller 21 is the 1 st video controller (which is required to correspond to the display area 1) among all video controllers, the position mark 2 indicates that the video controller 22 is the 2 nd video controller (which is required to correspond to the display area 2) among all video controllers, and so on.
For another example, for the video controller 21, based on the order of the series connection of the plurality of video controllers, determining that the previous video controller of the present video controller 21 is empty may determine that the location identifier corresponding to the present video controller 21 is a default value, such as 4, 5, 6, etc., taking the location identifier of 4 as an example. For the video controller 22, based on the sequence of the series connection of the plurality of video controllers, it is determined that the previous video controller of the present video controller 22 is the video controller 21, the position identifier corresponding to the present video controller 22 is the difference between the position identifier 4 corresponding to the video controller 21 and the preset value 1, that is, the position identifier is 3, and so on, the position identifier corresponding to the video controller 23 is 2, and the position identifier corresponding to the video controller 24 is 1.
In the above example, the position mark 4 indicates that the video controller 21 is the 1 st video controller (which is required to correspond to the display area 1) among all video controllers, the position mark 3 indicates that the video controller 22 is the 2 nd video controller (which is required to correspond to the display area 2) among all video controllers, and so on.
In one possible implementation, for each video controller, the video controller may generate a first type of broadcast message, and send the first type of broadcast message to other video controllers connected to the video controller, where the first type of broadcast message includes the display area information and a location identifier corresponding to the video controller. On the basis, the video controller acquires the display area information corresponding to the video display, and determines the position identifier corresponding to the video controller, which can include but is not limited to: if a configuration command is received, acquiring display area information from the configuration command, and determining a position identifier corresponding to the video controller as a first value (such as 1); or if a first type of broadcast message sent by other video controllers connected with the video controller is received, acquiring display area information from the first type of broadcast message, and determining a position identifier corresponding to the video controller based on the first type of broadcast message; the corresponding position identifier of the video controller is the sum of the position identifier carried by the first type broadcast message and the second value (such as 1). For example, after the video controller receives a first type of broadcast message sent by another video controller connected to the video controller, the video controller may prohibit forwarding of the first type of broadcast message to the other video controller connected to the video controller.
For example, the user may issue a configuration command including display area information to the video controller 21 through the client. After receiving the configuration command, the video controller 21 acquires the display area information from the configuration command, and determines that the position identifier corresponding to the video controller 21 is 1. Then, the video controller 21 may generate a first type broadcast message 1 and transmit the first type broadcast message 1 to the video controller 22 connected to the video controller 21, and the first type broadcast message 1 may include display area information and a location identification 1.
After receiving the first type broadcast message 1, the video controller 22 may obtain display area information from the first type broadcast message 1, and determine that the location identifier corresponding to the video controller 22 is 2, that is, the sum of the location identifier 1 carried by the first type broadcast message 1 and the second value 1. The video controller 22, after receiving the first type broadcast message 1, prohibits forwarding the first type broadcast message 1 to other video controllers. After determining that the location identifier corresponding to the video controller 22 is 2, the video controller 22 may further generate a first type broadcast message 2 and transmit the first type broadcast message 2 to the video controller 21 and the video controller 23 connected to the video controller 22, respectively, and the first type broadcast message 2 may include display area information and the location identifier 2.
After receiving the first type broadcast message 2, the video controller 21 discards the first type broadcast message 2 because the location identifier 2 carried by the first type broadcast message 2 is greater than the location identifier 1 of the video controller 21.
After receiving the first type broadcast message 2, the video controller 23 obtains the display area information from the first type broadcast message 2, and determines that the position identifier corresponding to the video controller 23 is 3. After receiving the broadcast message 2 of the first type, the video controller 23 prohibits forwarding the broadcast message 2 of the first type to other video controllers. And, the video controller 23 generates a first type broadcast message 3, and transmits the first type broadcast message 3 to the video controller 22 and the video controller 24, respectively, and the first type broadcast message 3 may include display area information and a location identification 3.
After receiving the first type broadcast message 3, the video controller 22 discards the first type broadcast message 3 because the location identifier 3 carried by the first type broadcast message 3 is greater than the location identifier 2 of the video controller 22.
After receiving the first type broadcast message 3, the video controller 24 may obtain display area information from the first type broadcast message 3, and determine that the location identifier corresponding to the video controller 24 is 4. After receiving the first type broadcast message 3, the video controller 24 may prohibit forwarding of the first type broadcast message 3 to other video controllers. And, the video controller 24 generates a first type broadcast message 4, and transmits the first type broadcast message 4 to the video controller 23, and the first type broadcast message 4 may include display area information and a location identification 4.
After receiving the first type broadcast message 4, the video controller 23 discards the first type broadcast message 4 because the location identifier 4 carried by the first type broadcast message 4 is greater than the location identifier 3 of the video controller 23.
In one possible implementation, for each video controller, the video controller may generate a second type of broadcast message and send the second type of broadcast message to other video controllers connected to the video controller, where the second type of broadcast message includes a location identifier corresponding to the video controller. On the basis, after receiving the second-type broadcast message sent by the other video controllers connected with the video controller, the video controller forwards the second-type broadcast message to the other video controllers connected with the video controller if the position identifier corresponding to the video controller is not the first value.
Or if the position identifier corresponding to the video controller is the first value, the video controller judges whether the position identifier carried in the second type of broadcast message is the third value; the third value may be a position identifier corresponding to the last video controller in all video controllers. If yes, the video controller outputs information that the position identifiers of all the video controllers are successfully set. If not, updating the target position identification based on the position identification carried in the second type of broadcast message; wherein the target location identifier is the last location identifier that has been successfully received; and outputting the target position identification to indicate that the link between the video controller corresponding to the target position identification and the last video controller is abnormal if the second-type broadcast message with the position identification of the third value is not received after the port isolation closing timer is overtime.
For example, the video controller 21 may generate a second type broadcast message 1 and transmit the second type broadcast message 1 to the video controller 22 connected to the video controller 21, the second type broadcast message 1 including the location identification 1. After receiving the second type broadcast message 1, the video controller 22 discards the second type broadcast message 1 because the location identifier 1 carried by the second type broadcast message 1 is smaller than the location identifier 2 of the video controller 22.
The video controller 22 generates a second type broadcast message 2 and transmits the second type broadcast message 2 to the video controller 21 and the video controller 23, respectively, which are connected to the video controller 22, the second type broadcast message 2 including the location identification 2. After the video controller 23 receives the second type broadcast message 2, the second type broadcast message 2 is discarded if the location identifier 2 carried by the second type broadcast message 2 is smaller than the location identifier 3 of the video controller 23.
After receiving the second type broadcast message 2, the video controller 21 needs to perform subsequent processing based on the second type broadcast message 2 because the location identifier 2 carried by the second type broadcast message 2 is larger than the location identifier 1 of the video controller 21. For example, since the location identifier corresponding to the video controller 21 is a first value 1, and the location identifier 2 carried in the second type broadcast message 2 is not a third value (there are 4 video controllers in total, and the location identifier corresponding to the last video controller is 4, that is, the third value is 4), the video controller 21 updates the target location identifier, that is, updates the target location identifier to 2.
The video controller 23 generates a second type of broadcast message 3 and sends the second type of broadcast message 3 to the video controller 22 and the video controller 24, respectively, the second type of broadcast message 3 may include a location identification 3. After receiving the second type broadcast message 3, the video controller 24 discards the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is smaller than the location identifier 4 of the video controller 24.
After receiving the second type broadcast message 3, the video controller 22 needs to perform subsequent processing based on the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is larger than the location identifier 2 of the video controller 22. For example, since the location identifier corresponding to the video controller 22 is not the first value 1, the second type broadcast message 3 is forwarded to the video controller 21 and the video controller 23 respectively.
After receiving the second type broadcast message 3, the video controller 23 discards the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is equal to the location identifier 3 of the video controller 23.
After receiving the second type broadcast message 3, the video controller 21 needs to perform subsequent processing based on the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is larger than the location identifier 1 of the video controller 21. For example, since the location identifier corresponding to the video controller 21 is a first value 1, and the location identifier 3 carried in the second type broadcast message 3 is not a third value 4, the video controller 21 updates the target location identifier, i.e. updates the target location identifier to 3.
When updating the target position identifier, if the position identifier 3 carried in the second type broadcast message 3 is greater than the value of the target position identifier, updating the value of the target position identifier to the position identifier 3 carried in the second type broadcast message 3, otherwise, keeping the value of the target position identifier unchanged.
The video controller 24 generates a second type of broadcast message 4 and sends the second type of broadcast message 4 to the video controller 23, the second type of broadcast message 4 comprising the location identification 4. After the video controller 23 receives the second type broadcast message 4, the location identifier 4 carried by the second type broadcast message 4 is greater than the location identifier 3 of the video controller 23, and subsequent processing is performed based on the second type broadcast message 4. For example, since the location identifier corresponding to the video controller 23 is not the first value 1, the second type broadcast message 4 is forwarded to the video controller 22 and the video controller 24 respectively. After the video controller 24 receives the second type broadcast message 4, the location identifier 4 carried by the second type broadcast message 4 is equal to the location identifier 4 of the video controller 24, and the second type broadcast message 4 is discarded.
After receiving the second type broadcast message 4, the video controller 22 needs to perform subsequent processing based on the second type broadcast message 4 because the location identifier 4 carried by the second type broadcast message 4 is larger than the location identifier 2 of the video controller 22. For example, since the location identifier corresponding to the video controller 22 is not the first value 1, the second type broadcast message 4 is forwarded to the video controller 21 and the video controller 23 respectively. After receiving the second type broadcast message 4, the video controller 23 does not repeat the implementation process.
After receiving the second type broadcast message 4, the video controller 21 needs to perform subsequent processing based on the second type broadcast message 4 because the location identifier 4 carried by the second type broadcast message 4 is larger than the location identifier 1 of the video controller 21. For example, because the location identifier corresponding to the video controller 21 is the first value 1, and the location identifier 4 carried in the second type broadcast message 4 is the third value 4, the video controller 21 can output information that the location identifiers of all video controllers have been successfully set, that is, all video controllers determine the location identifier of the video controller, so as to complete the location identifier configuration process.
For example, after the port isolation shutdown timer (the starting process of the timer may refer to the following embodiments) expires, if a second type broadcast message with a location identifier of a third value of 4 is not received, the target location identifier is output, so as to indicate that the link between the video controller corresponding to the target location identifier and the last video controller is abnormal. For example, if the target location identifier is 3, it indicates that the link between the third video controller and the last video controller is abnormal, and the link needs to be repaired by fault.
Before the port isolation closing timer times out, if the second type broadcast message with the position identification of the third value 4 is received, outputting the information that the position identifications of all video controllers are successfully set.
In one possible implementation, the video controller may include a master control chip and a switching chip for each video controller. For the first video controller, the switch chip may include a second port connected to the downstream video controller, and a third port connected to the master control chip. For the last video controller, the switch chip may include a first port connected to the upstream video controller, a third port connected to the master control chip. For the remaining video controllers (e.g., second video controller, etc.) except for the first video controller and the last video controller, the switch chip may include a first port connected to the upstream video controller, a second port connected to the downstream video controller, and a third port connected to the main control chip.
For each video controller, if the exchange chip receives a first type of broadcast message sent by the upstream video controller through the first port, forwarding of the first type of broadcast message to the downstream video controller through the second port is prohibited, the first type of broadcast message is forwarded to the main control chip through the third port, the main control chip processes the first type of broadcast message, for example, the main control chip acquires display area information from the first type of broadcast message, and determines a position identifier corresponding to the video controller based on the first type of broadcast message.
If the exchange chip receives the second type broadcast message sent by the upstream video controller through the first port, the second type broadcast message is forbidden to be forwarded to the downstream video controller through the second port, and the second type broadcast message is forwarded to the main control chip through the third port, and is processed by the main control chip based on the second type broadcast message.
If the exchange chip receives the first type broadcast message sent by the downstream video controller through the second port, the exchange chip prohibits forwarding the first type broadcast message to the upstream video controller through the first port, and forwards the first type broadcast message to the main control chip through the third port, and the main control chip processes the first type broadcast message.
If the exchange chip receives the second type broadcast message sent by the downstream video controller through the second port, the exchange chip prohibits forwarding the second type broadcast message to the upstream video controller through the first port, and forwards the second type broadcast message to the main control chip through the third port, and the main control chip processes the second type broadcast message based on the second type broadcast message.
For each video controller, the master control chip may generate a first type of broadcast message and send the first type of broadcast message to the switching chip. After receiving the first type broadcast message through the third port, the switching chip forwards the first type broadcast message to the upstream video controller through the first port, and forwards the first type broadcast message to the downstream video controller through the second port. And the main control chip can generate the second type broadcast message and send the second type broadcast message to the exchange chip. After receiving the second type broadcast message through the third port, the switching chip forwards the second type broadcast message to the upstream video controller through the first port, and forwards the second type broadcast message to the downstream video controller through the second port.
In one possible implementation manner, when the network isolation instruction is broadcast between the plurality of video controllers, for each video controller, the master control chip may configure the third port as a communication port of the first port after receiving the network isolation instruction, so that data (such as a first type broadcast message and a second type broadcast message) received by the first port is transmitted to the third port, and data (such as the first type broadcast message and the second type broadcast message) received by the first port is prohibited from being transmitted to the second port; configuring the third port as a communication port of the second port, so that data received by the second port is transmitted to the third port, and data received by the second port is forbidden to be transmitted to the first port; the first port and the second port are configured as communication ports of the third port such that data received by the third port is transmitted to the first port and the second port.
In one possible implementation, the master control chip may start the port isolation shutdown timer after receiving the network isolation instruction (the duration of the port isolation shutdown timer may be empirically configured, such as 5 seconds). After the port isolation closing timer is overtime, the main control chip can configure the second port and the third port as communication ports of the first port, so that data received by the first port are transmitted to the second port and the third port; configuring the first port and the third port as communication ports of the second port, so that data received by the second port is transmitted to the first port and the third port; the first port and the second port are configured as communication ports of the third port such that data received by the third port is transmitted to the first port and the second port.
As can be seen from the above technical solutions, in the embodiment of the present application, the display control system includes a video display and a plurality of video controllers, where the plurality of video controllers are directly connected in a serial manner, so that a complex network switching scenario does not need to be built, i.e., a network switch does not need to be deployed, only a maintenance process of the plurality of video controllers is needed, a maintenance process of the network switch does not need to be performed, and the maintenance process is simplified. When the maintenance process of the video controllers is carried out, the video controllers can be configured in an interactive mode, a user is not required to log in to each video controller in sequence to configure the video controllers, the configuration workload of the user is reduced, and the time consumed in the maintenance process is reduced. For example, the multiple video controllers can determine the target display area corresponding to the video controller in an interactive manner, so that a sub-image matched with the target display area can be divided from the image to be displayed, and the sub-image can be displayed in the target display area of the video display.
The technical scheme of the embodiment of the application is described below with reference to specific application scenarios.
For each video controller, the video controller may include a main control chip and an exchange chip, and is shown in fig. 5A and 5B, which are schematic structural diagrams of the video controller, MDI1 represents a first port connected to an upstream video controller, MDI2 represents a second port connected to a downstream video controller, and MDI0 represents a third port connected to the main control chip. In fig. 5A, the main control chip only supports the MAC layer interface, and the switching chip may include a PHY (physical layer) interface corresponding to the MAC layer interface, where the PHY interface is responsible for a network switching function, so as to implement data transmission between the MAC layer interface and MDI 0. In fig. 5B, the PHY interface layer is built in the main control chip, so that MDI signals can be directly output to the outside, and the exchange chip can be in butt joint with the main control chip through MDI0, so that a network exchange function is realized, and a PHY interface is not needed.
In fig. 5A and 5B, the main control chip may include, but is not limited to, a control platform chip with a logic function, such as DSP, ARM, FPGA, and the type of the main control chip is not limited in this embodiment.
Referring to fig. 5A and 5B, when the port isolation function is started, the third port MDI0 is configured as the communication port of the first port MDI1, so that the data received by the first port MDI1 is transmitted to the third port MDI0, and the data received by the first port MDI1 is prohibited from being transmitted to the second port MDI2, for example, the first port MDI1 is configured to have a { MDI0} set of communication ports, and the port where the first port MDI1 allows data communication is only MDI0. The third MDI0 is configured as a communication port of the second MDI2, such that the data received by the second MDI2 is transmitted to the third MDI0 and the data received by the second MDI2 is prohibited from being transmitted to the first MDI1, for example, the second MDI2 is configured to have a { MDI0} communication port set, and the only ports where the second MDI2 allows data communication are MDI0. The first MDI1 and the second MDI2 are configured as communication ports of the third MDI0 such that data received by the third MDI0 is transmitted to the first MDI1 and the second MDI2, for example, the third MDI0 is configured to have a set of communication ports { MDI1, MDI2}, and the ports where the third MDI0 allows data communication are MDI1 and MDI2.
It should be noted that, the above is exemplified by the switch chip supporting 3 ports, and in practical application, the number of ports supported by the switch chip may be greater than 3, and in this embodiment, 3 ports are exemplified.
With the above configuration, communication between the third port MDI0 and the first port MDI1 is achieved, communication between the third port MDI0 and the second port MDI2 is achieved, but communication between the first port MDI1 and the second port MDI2 is not achieved, i.e., port isolation between the first port MDI1 and the second port MDI2 is achieved.
When the port isolation function is turned off, the third MDI0 and the second MDI2 are configured as communication ports of the first MDI1, so that data received by the first MDI1 is transmitted to the third MDI0 and the second MDI2, for example, the first MDI1 is configured to have a set of communication ports { MDI0, MDI2}, and the ports where the first MDI1 allows data communication are MDI0 and MDI2. The third MDI0 and the first MDI1 are configured as communication ports of the second MDI2 such that data received by the second MDI2 is transmitted to the third MDI0 and the first MDI1, for example, the second MDI2 is configured to the communication ports set to { MDI0, MDI1}, and the ports allowing the data communication of the second MDI2 are MDI0 and MDI1. The first MDI1 and the second MDI2 are configured as communication ports of the third MDI0 such that data received by the third MDI0 is transmitted to the first MDI1 and the second MDI2, for example, the third MDI0 is configured to have a set of communication ports { MDI1, MDI2}, and the ports where the third MDI0 allows data communication are MDI1 and MDI2. By the above configuration, communication between the third port MDI0 and the first port MDI1, communication between the third port MDI0 and the second port MDI2, and communication between the first port MDI1 and the second port MDI2 can be realized, that is, port isolation closing between the first port MDI1 and the second port MDI2 is realized.
Referring to fig. 6, a flowchart of an image display method is shown, and the method may include:
step 601, the user issues a configuration command to the video controller 21, which may include display area information, which may include, but is not limited to, rank information and routing information. For example, the user may issue a configuration command to the video controller 21 through a device client, a device liquid crystal screen, or an OSD (on-screen menu) menu or the like, without limitation.
Illustratively, the configuration command is used to trigger each video controller to execute an automatic update process of the location identifier, that is, each video controller adopts a subsequent step to implement the automatic update process of the location identifier.
After receiving the configuration command, the video controllers 21 send a network isolation instruction in a broadcast form in step 602, that is, each video controller may receive the network isolation instruction, where the network isolation instruction is used to instruct each video controller to start a port isolation function.
In the power-on initialization state of all the video controllers, the port isolation function is closed by default, so that after each video controller receives a network isolation instruction, the port isolation function can be started.
The video controller 21 configures the third port MDI0 as a communication port of the second port MDI2 and configures the second port MDI2 as a communication port of the third port MDI 0. For the video controller 22 and the video controller 23, the third port MDI0 is configured as a communication port of the first port MDI1, the third port MDI0 is configured as a communication port of the second port MDI2, and the first port MDI1 and the second port MDI2 are configured as communication ports of the third port MDI 0. The video controller 24 configures the third port MDI0 as a communication port of the first port MDI1 and configures the first port MDI1 as a communication port of the third port MDI 0.
In one possible implementation, after the video controller receives the network isolation instruction, the video controller may also start a port isolation shutdown timer (the duration of the port isolation shutdown timer may be empirically configured, such as 5 seconds), and after the port isolation shutdown timer expires, each video controller may automatically shut down the port isolation function, i.e., all video controllers automatically shut down port isolation after 5 seconds.
For example, in the case of automatically turning off the port isolation function, the video controller 21 configures the third port MDI0 as the communication port of the second port MDI2, and configures the second port MDI2 as the communication port of the third port MDI 0. For the video controller 22 and the video controller 23, the third port MDI0 and the second port MDI2 are configured as communication ports of the first port MDI1, the third port MDI0 and the first port MDI1 are configured as communication ports of the second port MDI2, and the first port MDI1 and the second port MDI2 are configured as communication ports of the third port MDI 0. The video controller 24 configures the third port MDI0 as a communication port of the first port MDI1 and configures the first port MDI1 as a communication port of the third port MDI 0.
In step 603, the main control chip of the video controller 21 may obtain the display area information from the configuration command, and determine that the location identifier corresponding to the video controller 21 is 1. Then, the main control chip may generate a first type broadcast message 1 and a second type broadcast message 1, the first type broadcast message 1 may include display area information and a location identification 1, the second type broadcast message 1 may include the location identification 1, and transmit the first type broadcast message 1 and the second type broadcast message 1 to the switching chip of the video controller 21. After receiving the first type broadcast message 1 and the second type broadcast message 1 through the third port MDI0, the switching chip may transmit the first type broadcast message 1 and the second type broadcast message 1 to the video controller 22 through the second port MDI 2.
Wherein the broadcast message may include a mode field indicating that the broadcast message is a first type of broadcast message when the value of the mode field is 0 and indicating that the broadcast message is a second type of broadcast message when the value of the mode field is 1. In the subsequent embodiment, a broadcast message with a mode field of 0 is referred to as a first type broadcast message, and a broadcast message with a mode field of 1 is referred to as a second type broadcast message.
In step 604, after receiving the first type broadcast message 1 and the second type broadcast message 1 through the first port MDI1, the switch chip of the video controller 22 prohibits forwarding the first type broadcast message 1 and the second type broadcast message 1 to the video controller 23 through the second port MDI2 based on the port isolation function, but forwards the first type broadcast message 1 and the second type broadcast message 1 to the main control chip through the third port MDI 0.
After receiving the first type broadcast message 1, the main control chip of the video controller 22 obtains the display area information from the first type broadcast message 1, and determines that the position identifier corresponding to the video controller 22 is 2, that is, the position identifier corresponding to the video controller 22 is the sum of the position identifier 1 carried by the first type broadcast message 1 and the second value 1.
After receiving the second type broadcast message 1, the main control chip of the video controller 22 discards the second type broadcast message 1, i.e. the main control chip does not forward the second type broadcast message 1 to the switch chip, because the location identifier 1 carried by the second type broadcast message 1 is smaller than the location identifier 2 of the video controller 22.
In step 605, the main control chip of the video controller 22 generates a first type broadcast message 2 and a second type broadcast message 2, where the first type broadcast message 2 may include display area information and a location identifier 2 corresponding to the video controller 22, and the second type broadcast message 2 may include the location identifier 2, and sends the first type broadcast message 2 and the second type broadcast message 2 to the switch chip of the video controller 22. After receiving the first type broadcast message 2 and the second type broadcast message 2 through the third port MDI0, the switching chip may transmit the first type broadcast message 2 and the second type broadcast message 2 to the video controller 21 through the first port and transmit the first type broadcast message 2 and the second type broadcast message 2 to the video controller 23 through the second port MDI 2.
After receiving the first type broadcast message 2 and the second type broadcast message 2 through the second port MDI2, the switching chip of the video controller 21 may forward the first type broadcast message 2 and the second type broadcast message 2 to the main control chip of the video controller 21 through the third port MDI0, and the processing is performed by the main control chip.
After receiving the first type broadcast message 2, the main control chip discards the first type broadcast message 2 because the location identifier 2 carried by the first type broadcast message 2 is greater than the location identifier 1 of the video controller 21.
After receiving the second type broadcast message 2, the main control chip performs subsequent processing based on the second type broadcast message 2 because the location identifier 2 carried by the second type broadcast message 2 is greater than the location identifier 1 of the video controller 21. For example, the location identifier corresponding to the video controller 21 is a first value 1, and the location identifier 2 carried in the second type broadcast message 2 is not a third value 4, and then the target location identifier is updated to 2.
In step 606, after receiving the first type broadcast message 2 and the second type broadcast message 2 through the first port MDI1, the switching chip of the video controller 23 prohibits forwarding the first type broadcast message 2 and the second type broadcast message 2 to the video controller 24 through the second port MDI2 based on the port isolation function, but forwards the first type broadcast message 2 and the second type broadcast message 2 to the main control chip through the third port MDI 0.
After receiving the first type broadcast message 2, the main control chip of the video controller 23 acquires display area information from the first type broadcast message 2, and determines that the position identifier corresponding to the video controller 23 is 3, that is, the position identifier corresponding to the video controller 23 is the sum of the position identifier 2 carried by the first type broadcast message 2 and the second value 1.
After receiving the second type broadcast message 2, the main control chip of the video controller 23 discards the second type broadcast message 2, i.e. the main control chip does not forward the second type broadcast message 2 to the exchange chip, because the position identifier 2 carried by the second type broadcast message 2 is smaller than the position identifier 3 of the video controller 23.
In step 607, the main control chip of the video controller 23 generates a first type broadcast message 3 and a second type broadcast message 3, where the first type broadcast message 3 may include display area information and a location identifier 3 corresponding to the video controller 23, and the second type broadcast message 3 may include the location identifier 3, and sends the first type broadcast message 3 and the second type broadcast message 3 to the switch chip of the video controller 23. After receiving the first type broadcast message 3 and the second type broadcast message 3 through the third port MDI0, the switching chip may transmit the first type broadcast message 3 and the second type broadcast message 3 to the video controller 22 through the first port and transmit the first type broadcast message 3 and the second type broadcast message 3 to the video controller 24 through the second port MDI 2.
After the exchange chip of the video controller 22 receives the first type broadcast message 3 and the second type broadcast message 3 through the second port MDI2, forwarding of the first type broadcast message 3 and the second type broadcast message 3 to the video controller 21 through the first port MDI1 is prohibited based on the port isolation function, but forwarding of the first type broadcast message 3 and the second type broadcast message 3 to the main control chip of the video controller 22 through the third port MDI0 is prohibited.
After receiving the first type broadcast message 3, the main control chip discards the first type broadcast message 3 because the location identifier 3 carried by the first type broadcast message 3 is greater than the location identifier 2 of the video controller 22.
After receiving the second type broadcast message 3, the main control chip needs to perform subsequent processing based on the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is larger than the location identifier 2 of the video controller 22. For example, because the location identifier corresponding to the video controller 22 is not the first value 1, the main control chip forwards the second type broadcast message 3 to the switch chip of the video controller 22.
After receiving the second type broadcast message 3 through the third port MDI0, the switching chip of the video controller 22 may forward the second type broadcast message 3 to the video controller 21 through the first port MDI1 and forward the second type broadcast message 3 to the video controller 23 through the second port MDI 2.
The switch chip of the video controller 23, after receiving the second type broadcast message 3 through the first port MDI1, prohibits forwarding the second type broadcast message 3 to the video controller 24 through the second port MDI2 based on the port isolation function, but forwards the second type broadcast message 3 to the main control chip through the third port MDI 0. After receiving the second type broadcast message 3, the main control chip discards the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is equal to the location identifier 3 of the video controller 23.
After receiving the second type broadcast message 3 through the second port MDI2, the switching chip of the video controller 21 forwards the second type broadcast message 3 to the main control chip through the third port MDI 0. After receiving the second type broadcast message 3, the main control chip needs to perform subsequent processing based on the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is larger than the location identifier 1 of the video controller 21. For example, the location identifier corresponding to the video controller 21 is a first value 1, and the location identifier 3 carried in the second type broadcast message 3 is not a third value 4, so that the target location identifier is updated to 3.
In step 608, after receiving the first type broadcast message 3 and the second type broadcast message 3 through the first port MDI1, the switch chip of the video controller 24 may forward the first type broadcast message 3 and the second type broadcast message 3 to the master chip through the third port MDI 0. After receiving the first type broadcast message 3, the main control chip acquires the display area information from the first type broadcast message 3, and determines that the position identifier corresponding to the video controller 24 is 4, that is, the sum of the position identifier 3 carried by the first type broadcast message 3 and the second value 1. After receiving the second type broadcast message 3, the main control chip discards the second type broadcast message 3 because the location identifier 3 carried by the second type broadcast message 3 is smaller than the location identifier 4 of the video controller 24.
Step 609, the main control chip of the video controller 24 generates a first type broadcast message 4 and a second type broadcast message 4, where the first type broadcast message 4 may include display area information and a location identifier 4 corresponding to the video controller 24, and the second type broadcast message 4 may include the location identifier 4, and sends the first type broadcast message 4 and the second type broadcast message 4 to the switch chip of the video controller 24. The switching chip of the video controller 24 may transmit the first type broadcast message 4 and the second type broadcast message 4 to the video controller 23 through the first port after receiving the first type broadcast message 4 and the second type broadcast message 4 through the third port MDI 0.
After the exchange chip of the video controller 23 receives the first type broadcast message 4 and the second type broadcast message 4 through the second port MDI2, forwarding of the first type broadcast message 4 and the second type broadcast message 4 to the video controller 22 through the first port MDI1 is prohibited based on the port isolation function, but forwarding of the first type broadcast message 4 and the second type broadcast message 4 to the main control chip of the video controller 23 through the third port MDI0 is prohibited.
After receiving the first type broadcast message 4, the main control chip discards the first type broadcast message 4 because the location identifier 4 carried by the first type broadcast message 4 is greater than the location identifier 3 of the video controller 23.
After receiving the second type broadcast message 4, the main control chip needs to perform subsequent processing based on the second type broadcast message 4 because the location identifier 4 carried by the second type broadcast message 4 is larger than the location identifier 3 of the video controller 23. For example, because the location identifier corresponding to the video controller 23 is not the first value 1, the main control chip forwards the second type broadcast message 4 to the switch chip of the video controller 23.
After receiving the second type of broadcast message 4 through the third port MDI0, the switching chip of the video controller 23 may forward the second type of broadcast message 4 to the video controller 22 through the first port MDI1 and forward the second type of broadcast message 4 to the video controller 24 through the second port MDI 2.
The switching chip of the video controller 24 forwards the second type of broadcast message 4 to the main control chip through the third port MDI0 after receiving the second type of broadcast message 4 through the first port MDI 1. After receiving the second type broadcast message 4, the main control chip discards the second type broadcast message 4 because the location identifier 4 carried by the second type broadcast message 4 is equal to the location identifier 4 of the video controller 24.
After the exchange chip of the video controller 22 receives the second type broadcast message 4 through the second port MDI2, the forwarding of the second type broadcast message 4 to the video controller 21 through the first port MDI1 is prohibited based on the port isolation function, but the second type broadcast message 4 is forwarded to the master control chip of the video controller 22 through the third port MDI 0. After receiving the second type broadcast message 4, the main control chip needs to perform subsequent processing based on the second type broadcast message 4 because the location identifier 4 carried by the second type broadcast message 4 is larger than the location identifier 2 of the video controller 22. For example, because the location identifier corresponding to the video controller 22 is not the first value 1, the main control chip forwards the second type broadcast message 4 to the switch chip of the video controller 22.
After receiving the second type of broadcast message 4 through the third port MDI0, the switching chip of the video controller 22 may forward the second type of broadcast message 4 to the video controller 21 through the first port MDI1 and forward the second type of broadcast message 4 to the video controller 23 through the second port MDI 2.
After receiving the second type broadcast message 4 through the first port MDI1, the switch chip of the video controller 23 can refer to the above embodiment, and the detailed description is omitted here.
After receiving the second type broadcast message 4 through the second port MDI2, the switching chip of the video controller 21 forwards the second type broadcast message 4 to the main control chip through the third port MDI 0. After receiving the second type broadcast message 4, the main control chip needs to perform subsequent processing based on the second type broadcast message 4 because the location identifier 4 carried by the second type broadcast message 4 is larger than the location identifier 1 of the video controller 21.
For example, because the location identifier corresponding to the video controller 21 is the first value 1, and the location identifier 4 carried in the second type broadcast message 4 is the third value 4, the video controller 21 may output information that the location identifiers of all video controllers have been successfully set, that is, all video controllers determine the location identifier of the video controller, and the configuration process of the location identifier has been successfully completed.
Illustratively, after receiving the network isolation instruction, the video controller 21 may start a port isolation off timer. Before the port isolation closing timer times out, if a second type broadcast message with a position identification of a third value 4 has been received, the video controller 21 outputs information that the position identifications of all the video controllers have been successfully set. After the port isolation closing timer times out, if the second type broadcast message with the position identifier being the third value 4 is not received, the video controller 21 outputs the target position identifier to indicate that the link between the video controller corresponding to the target position identifier and the last video controller is abnormal.
In summary, for each video controller, the video controller may determine display area information and a location identifier corresponding to the video controller, determine multiple display areas of the video display based on the display area information, and determine a target display area corresponding to the video controller from the multiple display areas based on the display area information and the location identifier, so as to realize segmentation and display of the image to be displayed.
For example, the position identifier corresponding to the video controller 21 is 1, which indicates that the video controller 21 is the 1 st video controller of all the video controllers, and corresponds to the display area 1 in fig. 3A to 3C. The corresponding location of video controller 22 is identified as 2, indicating that video controller 22 is the 2 nd of all video controllers, corresponding to display area 2 in fig. 3A-3C. The position of the video controller 23 is denoted by 3, indicating that the video controller 23 is the 3 rd video controller of all video controllers, corresponding to the display area 3 in fig. 3A to 3C. The video controller 24 corresponds to a position number of 4, indicating that the video controller 24 is the 4 th video controller of all video controllers, corresponding to the display area 4 in fig. 3A-3C. Based on the information, the image to be displayed can be segmented, and each video controller can extract the corresponding segmented image to display, and finally the segmented image is spliced into a complete image to display.
Based on the same application concept as the above method, a display control system is provided in the embodiment of the present application, where the display control system may include a video display and a plurality of video controllers (the video controllers may be, for example, a transmission card controller, etc.), and the plurality of video controllers are connected in a serial manner, where:
for each video controller, the video controller is configured to acquire display area information corresponding to the video display, and determine a plurality of display areas of the video display based on the display area information; determining a position identifier corresponding to the video controller, and determining a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence; dividing a sub-image matched with the target display area from the image to be displayed, and displaying the sub-image in the target display area;
the video display is used for displaying each sub-image of the image to be displayed.
The video controller is specifically configured to, when determining the location identifier corresponding to the video controller:
Determining a previous video controller of the present video controller based on an order of series connection of the plurality of video controllers; determining a position identifier corresponding to the video controller based on the position identifier corresponding to the previous video controller; the position identifier corresponding to the video controller is the sum of the position identifier corresponding to the previous video controller and a preset value; or the position identifier corresponding to the video controller is the difference between the position identifier corresponding to the previous video controller and a preset value.
The video controller is further configured to generate a first type of broadcast message, and send the first type of broadcast message to other video controllers connected to the video controller; the first type broadcast message comprises the display area information and a position identifier corresponding to the video controller;
the video controller acquires display area information corresponding to the video display, and is specifically used for determining a position identifier corresponding to the video controller: if a configuration command is received, acquiring the display area information from the configuration command, and determining a position mark corresponding to the video controller as a first value;
Or if a first type of broadcast message sent by other video controllers connected with the video controller is received, acquiring the display area information from the first type of broadcast message, and determining a position identifier corresponding to the video controller based on the first type of broadcast message; the position identifier corresponding to the video controller is the sum of the position identifier carried by the first type of broadcast message and the second value.
The video controller is further configured to prohibit forwarding of the first type broadcast message to other video controllers connected to the video controller after receiving the first type broadcast message.
The video controller comprises a main control chip and an exchange chip, and if the exchange chip comprises a first port connected with the upstream video controller, a second port connected with the downstream video controller and a third port connected with the main control chip; the switching chip is used for prohibiting forwarding of the first type broadcast message to the downstream video controller through the second port after receiving the first type broadcast message sent by the upstream video controller through the first port, and forwarding the first type broadcast message to the main control chip through the third port; the main control chip is used for acquiring the display area information from the first type of broadcast messages and determining a position identifier corresponding to the video controller based on the first type of broadcast messages;
The main control chip is used for generating a first type broadcast message after determining a position identifier corresponding to the video controller based on the first type broadcast message, and sending the first type broadcast message to the exchange chip; and the switching chip is used for forwarding the first-type broadcast message to the upstream video controller through the first port after receiving the first-type broadcast message through the third port, and forwarding the first-type broadcast message to the downstream video controller through the second port.
When a network isolation instruction is broadcasted among the plurality of video controllers, the main control chip is used for configuring a third port as a communication port of a first port after the network isolation instruction is received, so that data received by the first port is transmitted to the third port, and the data received by the first port is forbidden to be transmitted to a second port; configuring the third port as a communication port of the second port, so that data received by the second port is transmitted to the third port, and data received by the second port is forbidden to be transmitted to the first port; configuring the first port and the second port as communication ports of the third port so that data received by the third port is transmitted to the first port and the second port; the main control chip is used for starting a port isolation closing timer after receiving the network isolation instruction; after the port isolation closing timer times out, the second port and the third port are configured as communication ports of the first port, the first port and the third port are configured as communication ports of the second port, and the first port and the second port are configured as communication ports of the third port.
In a possible implementation manner, the video controller is further configured to generate a second type of broadcast message, and send the second type of broadcast message to other video controllers connected to the video controller, where the second type of broadcast message may include a location identifier corresponding to the video controller;
the video controller is further configured to, after receiving a second type broadcast message sent by another video controller connected to the video controller, forward the second type broadcast message to the other video controller connected to the video controller if the location identifier corresponding to the video controller is not the first value;
or if the position identifier corresponding to the video controller is the first value, judging whether the position identifier carried in the second type of broadcast message is the third value; the third value is a position identifier corresponding to the last video controller in the plurality of video controllers;
if yes, outputting information that the position identifiers of all the video controllers are successfully set; if not, updating a target position identifier based on the position identifier carried in the second-type broadcast message, wherein the target position identifier is the last position identifier which is successfully received; and outputting a target position identifier to indicate that the link between the video controller corresponding to the target position identifier and the last video controller is abnormal if the second-type broadcast message with the position identifier of the third value is not received after the port isolation closing timer is overtime.
Based on the same application concept as the above method, an LED display control system is provided in the embodiments of the present application, where the LED display control system may include an LED display and a plurality of video controllers (such as a transmitting card controller, etc.), where the plurality of video controllers are connected in a serial manner, where:
for each video controller, the video controller is configured to acquire display area information corresponding to the LED display, and determine a plurality of display areas of the LED display based on the display area information; determining a position identifier corresponding to the video controller, and determining a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence; dividing a sub-image matched with the target display area from the image to be displayed, and displaying the sub-image in the target display area;
and the LED display is used for displaying each sub-image of the image to be displayed.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. A typical implementation device is a computer, which may be in the form of a personal computer, laptop computer, cellular telephone, camera phone, smart phone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being functionally divided into various units, respectively. Of course, the functions of each element may be implemented in the same piece or pieces of software and/or hardware when implementing the present application.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the application may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. 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 processor, 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.
Moreover, 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.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (13)

1. A display control system comprising a video display and a plurality of video controllers connected in series, wherein:
for each video controller, the video controller is configured to acquire display area information corresponding to the video display, and determine a plurality of display areas of the video display based on the display area information; determining a position identifier corresponding to the video controller, and determining a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence; dividing a sub-image matched with the target display area from the image to be displayed, and displaying the sub-image in the target display area;
the video display is used for displaying all the sub-images of the image to be displayed;
the video controller is further configured to generate a second type broadcast message, and send the second type broadcast message to other video controllers connected to the video controller, where the second type broadcast message includes a location identifier corresponding to the video controller;
The video controller is further configured to, after receiving a second type broadcast message sent by another video controller connected to the video controller, forward the second type broadcast message to the other video controller connected to the video controller if the location identifier corresponding to the video controller is not the first value;
or if the position identifier corresponding to the video controller is the first value, judging whether the position identifier carried in the second type of broadcast message is the third value; the third value is a position identifier corresponding to the last video controller in the plurality of video controllers;
if yes, outputting information that the position identifiers of all the video controllers are successfully set; if not, updating a target position identifier based on the position identifier carried in the second-type broadcast message, wherein the target position identifier is the last position identifier which is successfully received; and outputting a target position identifier to indicate that the link between the video controller corresponding to the target position identifier and the last video controller is abnormal if the second-type broadcast message with the position identifier of the third value is not received after the port isolation closing timer is overtime.
2. The display control system of claim 1 wherein,
the video controller is specifically used for determining the position identifier corresponding to the video controller:
determining a previous video controller of the present video controller based on an order of series connection of the plurality of video controllers; determining a position identifier corresponding to the video controller based on the position identifier corresponding to the previous video controller; the position identifier corresponding to the video controller is the sum of the position identifier corresponding to the previous video controller and a preset value; or the position identifier corresponding to the video controller is the difference between the position identifier corresponding to the previous video controller and a preset value.
3. The display control system according to claim 1 or 2, wherein,
the video controller is further configured to generate a first type of broadcast message, and send the first type of broadcast message to other video controllers connected to the video controller; the first type broadcast message comprises the display area information and a position identifier corresponding to the video controller;
the video controller acquires display area information corresponding to the video display, and is specifically used for determining a position identifier corresponding to the video controller: if a configuration command is received, acquiring the display area information from the configuration command, and determining a position mark corresponding to the video controller as a first value;
Or if a first type of broadcast message sent by other video controllers connected with the video controller is received, acquiring the display area information from the first type of broadcast message, and determining a position identifier corresponding to the video controller based on the first type of broadcast message; the position identifier corresponding to the video controller is the sum of the position identifier carried by the first type of broadcast message and the second value.
4. A display control system according to claim 3, wherein the video controller is further configured to prohibit forwarding of the first type broadcast message to other video controllers connected to the video controller after receiving the first type broadcast message sent by other video controllers connected to the video controller.
5. The display control system of claim 4, wherein the video controller comprises a master control chip and a switch chip, if the switch chip comprises a first port connected to an upstream video controller, a second port connected to a downstream video controller, and a third port connected to the master control chip;
the switching chip is used for prohibiting forwarding of the first type broadcast message to the downstream video controller through the second port after receiving the first type broadcast message sent by the upstream video controller through the first port, and forwarding the first type broadcast message to the main control chip through the third port; the main control chip is used for acquiring the display area information from the first type of broadcast messages and determining a position identifier corresponding to the video controller based on the first type of broadcast messages;
The main control chip is used for generating a first type broadcast message after determining a position identifier corresponding to the video controller based on the first type broadcast message, and sending the first type broadcast message to the exchange chip; and the switching chip is used for forwarding the first-type broadcast message to the upstream video controller through the first port after receiving the first-type broadcast message through the third port, and forwarding the first-type broadcast message to the downstream video controller through the second port.
6. The display control system of claim 5 wherein,
when a network isolation instruction is broadcast among the plurality of video controllers, the main control chip is used for configuring a third port as a communication port of a first port after the network isolation instruction is received, so that data received by the first port is transmitted to the third port, and the data received by the first port is forbidden to be transmitted to a second port; configuring the third port as a communication port of the second port, so that data received by the second port is transmitted to the third port, and data received by the second port is forbidden to be transmitted to the first port; configuring the first port and the second port as communication ports of the third port so that data received by the third port is transmitted to the first port and the second port;
The main control chip is used for starting a port isolation closing timer after receiving the network isolation instruction; after the port isolation closing timer times out, the second port and the third port are configured as communication ports of the first port, the first port and the third port are configured as communication ports of the second port, and the first port and the second port are configured as communication ports of the third port.
7. An image display method, wherein a display control system includes a video display and a plurality of video controllers connected in series, the method comprising:
for each video controller, the video controller acquires display area information corresponding to the video display, and determines a plurality of display areas of the video display based on the display area information;
the video controller determines a position identifier corresponding to the video controller, and determines a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence;
The video controller divides a sub-image matched with the target display area from an image to be displayed;
the video controller displays the sub-image in the target display area;
after the video controller determines the position identifier corresponding to the video controller, the method further includes: the video controller generates a second type broadcast message and sends the second type broadcast message to other video controllers connected with the video controller, wherein the second type broadcast message comprises a position identifier corresponding to the video controller;
after receiving the second type broadcast message sent by the other video controllers connected with the video controller, if the position identifier corresponding to the video controller is not the first value, forwarding the second type broadcast message to the other video controllers connected with the video controller;
or if the position identifier corresponding to the video controller is the first value, judging whether the position identifier carried in the second type of broadcast message is the third value; the third value is a position identifier corresponding to the last video controller in the plurality of video controllers;
If yes, outputting information that the position identifiers of all the video controllers are successfully set;
if not, updating the target position identification based on the position identification carried in the second type of broadcast message; wherein the target location identity is the last location identity that has been successfully received;
and after the port isolation closing timer is overtime, if the second-type broadcast message with the position identification of the third value is not received, outputting the target position identification to indicate that the link between the video controller corresponding to the target position identification and the last video controller is abnormal.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
the video controller determines a position identifier corresponding to the video controller, and the method comprises the following steps:
determining a previous video controller of the present video controller based on an order of series connection of the plurality of video controllers; determining a position identifier corresponding to the video controller based on the position identifier corresponding to the previous video controller; the position identifier corresponding to the video controller is the sum of the position identifier corresponding to the previous video controller and a preset value; or the position identifier corresponding to the video controller is the difference between the position identifier corresponding to the previous video controller and a preset value.
9. The method according to claim 7 or 8, wherein after the video controller determines the location identifier corresponding to the video controller, the method further comprises: the video controller generates a first type of broadcast message and sends the first type of broadcast message to other video controllers connected with the video controller, wherein the first type of broadcast message comprises the display area information and a position identifier corresponding to the video controller;
the video controller obtains the display area information corresponding to the video display, determines the position identifier corresponding to the video controller, and comprises the following steps: if a configuration command is received, acquiring the display area information from the configuration command, and determining a position mark corresponding to the video controller as a first value;
or if a first type of broadcast message sent by other video controllers connected with the video controller is received, acquiring the display area information from the first type of broadcast message, and determining a position identifier corresponding to the video controller based on the first type of broadcast message; the position identifier corresponding to the video controller is the sum of the position identifier carried by the first type of broadcast message and the second value.
10. The method of claim 9, wherein the step of determining the position of the substrate comprises,
after the video controller receives the first type broadcast message sent by other video controllers connected with the video controller, the method further comprises the following steps: the video controller prohibits forwarding of the first type broadcast message to other video controllers connected to the video controller.
11. The method of claim 10, wherein the video controller comprises a master chip and a switch chip, and if the switch chip comprises a first port connected to the upstream video controller, a second port connected to the downstream video controller, and a third port connected to the master chip, the method further comprises:
after receiving a first type of broadcast message sent by an upstream video controller through a first port, the switching chip prohibits forwarding of the first type of broadcast message to a downstream video controller through a second port, forwards the first type of broadcast message to a main control chip through a third port, acquires the display area information from the first type of broadcast message by the main control chip, and determines a position identifier corresponding to the video controller based on the first type of broadcast message;
after the main control chip determines the position identifier corresponding to the video controller based on the first type broadcast message, generating the first type broadcast message, and sending the first type broadcast message to the exchange chip; and after receiving the first type of broadcast messages through the third port, the switching chip forwards the first type of broadcast messages to the upstream video controller through the first port and forwards the first type of broadcast messages to the downstream video controller through the second port.
12. The method of claim 11, wherein the method further comprises:
when a network isolation instruction is broadcast among the plurality of video controllers, the main control chip configures a third port as a communication port of a first port after receiving the network isolation instruction, so that data received by the first port is transmitted to the third port, and the data received by the first port is forbidden to be transmitted to a second port; configuring the third port as a communication port of the second port, so that data received by the second port is transmitted to the third port, and data received by the second port is forbidden to be transmitted to the first port; configuring the first port and the second port as communication ports of the third port so that data received by the third port is transmitted to the first port and the second port;
after receiving a network isolation instruction, the main control chip starts a port isolation closing timer; after the port isolation closing timer times out, the main control chip configures the second port and the third port as communication ports of the first port, configures the first port and the third port as communication ports of the second port, and configures the first port and the second port as communication ports of the third port.
13. An LED display control system comprising an LED display and a plurality of video controllers connected in series, wherein:
for each video controller, the video controller is configured to acquire display area information corresponding to the LED display, and determine a plurality of display areas of the LED display based on the display area information; determining a position identifier corresponding to the video controller, and determining a target display area corresponding to the video controller from the plurality of display areas based on the position identifier; the position identifiers corresponding to the video controllers are sequentially changed according to the serial connection sequence; dividing a sub-image matched with the target display area from the image to be displayed, and displaying the sub-image in the target display area;
the LED display is used for displaying each sub-image of the image to be displayed;
the video controller is further configured to generate a second type broadcast message, and send the second type broadcast message to other video controllers connected to the video controller, where the second type broadcast message includes a location identifier corresponding to the video controller;
The video controller is further configured to, after receiving a second type broadcast message sent by another video controller connected to the video controller, forward the second type broadcast message to the other video controller connected to the video controller if the location identifier corresponding to the video controller is not the first value;
or if the position identifier corresponding to the video controller is the first value, judging whether the position identifier carried in the second type of broadcast message is the third value; the third value is a position identifier corresponding to the last video controller in the plurality of video controllers;
if yes, outputting information that the position identifiers of all the video controllers are successfully set; if not, updating a target position identifier based on the position identifier carried in the second-type broadcast message, wherein the target position identifier is the last position identifier which is successfully received; and outputting a target position identifier to indicate that the link between the video controller corresponding to the target position identifier and the last video controller is abnormal if the second-type broadcast message with the position identifier of the third value is not received after the port isolation closing timer is overtime.
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