CN112397012A

CN112397012A - LED display screen, display control system, receiving card and module controller

Info

Publication number: CN112397012A
Application number: CN201910701001.1A
Authority: CN
Inventors: 冯思杭; 韦桂锋
Original assignee: Xian Novastar Electronic Technology Co Ltd
Current assignee: Xian Novastar Electronic Technology Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2021-02-23

Abstract

The invention relates to an LED display screen and a related display control system, a receiving card and a module controller. The LED display screen includes, for example: a plurality of LED display units; and the module controllers are respectively electrically connected with the LED display units, each module controller comprises a programmable logic device, a physical layer transceiver group, a first main Ethernet interface, a second main Ethernet interface, a first backup Ethernet interface and a second backup Ethernet interface, and the first main Ethernet interface, the second main Ethernet interface, the first backup Ethernet interface and the second backup Ethernet interface are electrically connected with the programmable logic device through the physical layer transceiver group. The first main Ethernet interface and the first backup Ethernet interface of the first module controller are respectively used for receiving two paths of image data signals with the same content, the second main Ethernet interface of the first module controller is electrically connected with the first main Ethernet interface of the second module controller, and the second backup Ethernet interface of the first module controller is electrically connected with the first backup Ethernet interface of the second module controller.

Description

LED display screen, display control system, receiving card and module controller

Technical Field

The invention relates to the technical field of display, in particular to an LED display screen, a display control system, a receiving card and a module controller.

Background

The LED display screen is more and more widely applied, and the LED display screen is more and more abundant in important occasions such as large conferences, product releases, television stations, world cups and the like without being opened. The important situation is self-evident for the stability of the system. If during an activity the economic loss due to unstable display of the LED display is huge, the impact is also very large. This has LED the industry to continually seek stable, reliable LED display screen solutions with backup mechanisms.

In order to improve the display stability of the LED display screen, a dual-card backup solution has been proposed, in which two receiving cards are used for controlling the same display box, one receiving card is a main receiving card, and when the main receiving card fails, the auxiliary receiving card is activated to be activated, thereby achieving the purpose of backup. However, a single display cabinet requires two receiving cards and a switching circuit for the two receiving cards, which leads to an increase in the cost of the LED display screen. In addition, it is known from a large amount of field feedback and research that the main reasons of phenomena such as unstable display, black screen and the like in the running process of the LED display screen are that a network cable and an RJ45 network port are easy to damage; that is, unreliable communication links are the main factors that cause instability during system operation.

Therefore, how to add a backup mechanism of a communication link to improve display stability without increasing excessive cost is a technical problem to be solved urgently at present.

Disclosure of Invention

Therefore, embodiments of the present invention provide an LED display screen, a display control system, a receiving card and a module controller to improve the display stability of the LED display screen.

On one hand, an LED display screen provided in an embodiment of the present invention includes: the LED display device comprises a plurality of LED display units, a plurality of LED display units and a plurality of LED modules, wherein each LED display unit comprises one or more LED modules; and a plurality of module controllers respectively electrically connected to the plurality of LED display units for driving and controlling the plurality of LED display units, wherein each of the module controllers comprises a programmable logic device, a physical layer transceiver group, a first main ethernet interface, a second main ethernet interface, a first backup ethernet interface, and a second backup ethernet interface, and the first main ethernet interface, the second main ethernet interface, the first backup ethernet interface, and the second backup ethernet interface are electrically connected to the programmable logic device through the physical layer transceiver group; the plurality of module controllers include a first module controller and a second module controller, the first primary ethernet interface and the first backup ethernet interface of the first module controller are respectively used for receiving two paths of image data signals with the same content, the second primary ethernet interface of the first module controller is electrically connected with the first primary ethernet interface of the second module controller, and the second backup ethernet interface of the first module controller is electrically connected with the first backup ethernet interface of the second module controller.

The embodiment provides a four-interface dual-channel transmission backup solution, which can solve the problem that the display of a system is unstable and reliable due to the fact that a network cable and a network port are easy to break, such as the problem of black screen.

In one embodiment of the present invention, the plurality of module controllers further includes a third module controller, the first primary ethernet interface of the third module controller is electrically connected to the second primary ethernet interface of the second module controller, and the first backup ethernet interface of the third module controller is electrically connected to the second backup ethernet interface of the second module controller.

In one embodiment of the invention, each of the module controllers comprises: the receiving card comprises a first circuit board, a first connecting piece, a microcontroller, the programmable logic device, the physical layer transceiver group, the first main Ethernet interface, the second main Ethernet interface, the first backup Ethernet interface and the second backup Ethernet interface, wherein the first connecting piece, the microcontroller, the programmable logic device and the second backup Ethernet interface are arranged on the first circuit board; and the conversion board comprises a second circuit board, a second connecting piece and a module interface group, wherein the second connecting piece and the module interface group are arranged on the second circuit board, the second connecting piece is connected with the first connecting piece, and the module interface group is electrically connected with the second connecting piece and the LED display units.

In another embodiment of the present invention, each of the module controllers includes: the receiving card comprises a first circuit board, a first connecting piece, a microcontroller, a programmable logic device, a first physical layer transceiver and a second physical layer transceiver, wherein the first connecting piece, the microcontroller, the programmable logic device and the first physical layer transceiver and the second physical layer transceiver are arranged on the first circuit board; the conversion board comprises a second circuit board, a second connecting piece, a module interface group, a third physical layer transceiver and a fourth physical layer transceiver in the physical layer transceiver group, a first main Ethernet interface, a second main Ethernet interface, a first backup Ethernet interface and a second backup Ethernet interface, wherein the second connecting piece is arranged on the second circuit board; two of the first main ethernet interface, the second main ethernet interface, the first backup ethernet interface, and the second backup ethernet interface are electrically connected to the first physical layer transceiver and the second physical layer transceiver respectively through the second connector and the first connector, and the other two are electrically connected to the third physical layer transceiver and the fourth physical layer transceiver respectively.

In another aspect, an embodiment of the present invention provides a display control system, including: a plurality of module controllers, wherein each of the module controllers comprises a programmable logic device, a physical layer transceiver group, a first primary Ethernet interface, a second primary Ethernet interface, a first backup Ethernet interface, and a second backup Ethernet interface, and the first primary Ethernet interface, the second primary Ethernet interface, the first backup Ethernet interface, and the second backup Ethernet interface electrically connect the programmable logic device through the physical layer transceiver group; a video distributor; the main controller and the backup controller are respectively electrically connected with the video distributor; the plurality of module controllers include a first module controller and a second module controller, the first primary ethernet interface and the first backup ethernet interface of the first module controller are electrically connected to the primary controller and the backup controller, respectively, the second primary ethernet interface of the first module controller is electrically connected to the first primary ethernet interface of the second module controller, and the second backup ethernet interface of the first module controller is electrically connected to the first backup ethernet interface of the second module controller.

In one embodiment of the present invention, the second ethernet interface of the third module controller is electrically connected to the primary controller, and the second backup ethernet interface of the third module controller is electrically connected to the backup controller.

The combination of the video distributor, the main controller and the backup controller of this embodiment can provide two paths of image data signals with the same content to be output to the plurality of module controllers, so as to implement a four-interface dual-channel transmission backup solution, and solve the problem that the system display is unstable and reliable due to easy damage of a network cable and a network port, such as the black screen problem.

On the other hand, an embodiment of the present invention provides a receiving card, including: the circuit board is provided with a connecting piece, a microcontroller, a programmable logic device, a physical layer transceiver group, a first main Ethernet interface, a second main Ethernet interface, a first backup Ethernet interface and a second backup Ethernet interface, wherein the connecting piece is electrically connected with the microcontroller, the programmable logic device is electrically connected with the microcontroller, and the programmable logic device is electrically connected with the first main Ethernet interface, the second main Ethernet interface, the first backup Ethernet interface and the second backup Ethernet interface through the physical layer transceiver group.

The receiving card of the embodiment has four interfaces, which is convenient for realizing a dual-channel transmission backup solution, thereby solving the problem that the system display is unstable and reliable due to the easy damage of a network cable and a network interface, such as the problem of black screen.

In another aspect, an embodiment of the present invention provides a module controller, including: the receiving card comprises a first circuit board, a first connecting piece, a microcontroller, a programmable logic device and a first physical layer transceiver group, wherein the first connecting piece, the microcontroller, the programmable logic device and the first physical layer transceiver group are arranged on the first circuit board; the conversion board comprises a second circuit board, and a second connecting piece, a module interface group, a second physical layer transceiver group, a first main Ethernet interface, a second main Ethernet interface, a first backup Ethernet interface and a second backup Ethernet interface which are arranged on the second circuit board, wherein the second connecting piece is connected with the first connecting piece, the module interface group is electrically connected with the second connecting piece, and the second physical layer transceiver group is electrically connected with the programmable logic device through the second connecting piece and the first connecting piece; and two of the first main Ethernet interface, the second main Ethernet interface, the first backup Ethernet interface and the second backup Ethernet interface are respectively and electrically connected with the first physical layer transceiver group through the second connecting piece and the first connecting piece, and the other two are respectively and electrically connected with the second physical layer transceiver group.

The embodiment can provide four interfaces on the basis of not changing the hardware structure of the existing receiving card, and is convenient for realizing a dual-channel transmission backup solution, so that the problem that the system display is unstable and reliable due to the fact that a network cable and a network interface are easy to break, such as the problem of black screen, can be solved.

In summary, the above technical solutions of the embodiments of the present invention may have one or more of the following advantages: the dual-channel transmission backup solution is provided, the problem that the system display is unstable and reliable due to the fact that a network cable and a network port are easy to break can be solved, for example, the problem of screen blacking is solved, and therefore the display stability of the system is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an LED display screen according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a single display box body in fig. 1.

Fig. 3 is a schematic view of an embodiment of the display box shown in fig. 2.

Fig. 4 is a schematic view of another embodiment of the display case shown in fig. 2.

Fig. 5 is a schematic structural diagram of a display control system according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of another display control system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an LED display screen 100 provided in an embodiment of the present invention includes: a plurality of display housings 10, for example three display housings 10. It should be noted that the specific number of the display boxes 10 in the LED display screen 100 according to the embodiment of the present invention is not limited, that is, the three display boxes 10 illustrated herein are only examples and are not intended to limit the embodiment of the present invention. Furthermore, each display cabinet 10 has a

respective module controller

15a, 15b and 15b, and each

module controller

15a, 15b and 15b is configured with a 1 st primary ethernet interface, a 2 nd primary ethernet interface, a 1 st backup ethernet interface and a 2 nd backup ethernet interface. The 1 st primary ethernet interface and the 1 st backup ethernet interface of the module controller 15a are respectively used for receiving the image data signal a and the image data signal B having the same content, the 2 nd primary ethernet interface of the module controller 15a is electrically connected to the 1 st primary ethernet interface of the module controller 15B, and the 2 nd backup ethernet interface of the module controller 15a is electrically connected to the 1 st backup ethernet interface of the module controller 15B; similarly, the 2 nd primary ethernet interface of the module controller 15b is electrically connected to the 1 st primary ethernet interface of the module controller 15c, and the 2 nd backup ethernet interface of the module controller 15b is electrically connected to the 1 st backup ethernet interface of the module controller 15 c.

As mentioned above, in fig. 1, the solid line is the transmission channel of the image data signal a to be used as the main channel, and the dotted line is the transmission channel of the image data signal B to be used as the backup channel; for example, the LED display screen 100 outputs data transmitted by the main channel by default, and when the system detects that the main channel is disconnected, the system immediately switches to the backup channel, so as to ensure normal display of the LED display screen 100. For example, when the 1 st primary ethernet interface of the module controller 15a is broken, the module controller 15a uses the image data signal input from the 1 st backup ethernet interface; the same principle is also true for the channel selection of the

other module controllers

15b, 15 b. Therefore, it can be ensured to a certain extent that any one communication link is broken in the communication links of the whole LED display screen 100, and the normal display of the LED display screen 100 is not influenced, so that the stability of the system is greatly improved.

Referring to fig. 1 and 2, a single display cabinet 10, which is an example of the leftmost display cabinet in fig. 1, includes a module controller 15a and an LED display unit 13 electrically connected to the module controller 15 a. It should be noted here that the

module controllers

15a, 15b, 15c in the three display boxes 10 shown in fig. 1 have, for example, the same hardware structure, and for simplicity of description, the embodiment of the present invention only uses the module controller 15a as an example to describe in detail the specific implementation of each module controller.

In view of the above, as shown in fig. 2, the LED display unit 13 includes a plurality of, for example, four LED modules 130, a single LED module 130 typically includes a plurality of LED display pixels, and a single LED display pixel includes, for example, a plurality of RGB LED lamps. It should be noted here that the number of the LED modules 130 in the LED display unit 13 is not limited, and may even have only one LED module.

The module controller 15a is electrically connected to the LED display unit 13 for driving and controlling the LED display unit 13 to perform image display. Specifically, the module controller 15a includes a programmable logic device 1513, a physical layer transceiver group 1514, and ethernet interfaces 1515a to 1515d, and the ethernet interfaces 1515a to 1515d are electrically connected to the programmable logic device 1513 through the physical layer transceiver group 1514. Each ethernet interface 1515a to 1515d is, for example, an RJ45 network port integrated with the network transformer, or an RJ45 network port designed separately from the network transformer, such as four RJ45 network ports sharing one network transformer, two RJ45 network ports sharing one network transformer, or each RJ45 network port having a separate independent network transformer. In addition, the respective ethernet interfaces 1515a to 1515d serve as a 1 st main ethernet interface, a 2 nd main ethernet interface, a 1 st backup ethernet interface, and a 2 nd backup ethernet interface, and each of the 1 st main ethernet interface, the 2 nd main ethernet interface, the 1 st backup ethernet interface, and the 2 nd backup ethernet interface is specifically not particularly limited to which one of the ethernet interfaces 1515a to 1515 d; in other words, the positions and the order of the primary ethernet interface and the backup ethernet interface may be defaulted, or may be exchanged according to the actual situation. Further, the phy transceiver group 1514 may comprise, for example, four separate phy transceivers, or one quad-port phy transceiver, or two dual-port phy transceivers, to electrically connect to the four ethernet interfaces 1515 a-1515 d.

Referring to fig. 3, in one embodiment, the module controller 15a includes: a receiving card 151 and an adapter board 153. The receiving card 151 includes a circuit board 1510 and a connection 1511, a microcontroller 1512, a programmable logic device 1513, physical layer transceivers 1514 a-1514 d, and ethernet interfaces 1515 a-1515 d disposed on the circuit board 1510. Microcontroller 1512 and programmable logic device 1513 are electrically connected to connection 1511, and programmable logic device 1513 is electrically connected to microcontroller 1512. The programmable logic device 1513 is, for example, a Field Programmable Gate Array (FPGA) device. The microcontroller 1512 is, for example, an MCU such as an STM32 family chip. Physical layer transceivers 1514 a-1514 d form a physical layer transceiver group 1514, which is, for example, four ethernet physical layer transceivers, such as 1GBase-T, 2.5GBase-T, 5GBase-T or 10GBase-T ethernet physical layer transceiver chips. The connection 1511 is, for example, a high-contact plug including two high-contact plugs, such as 120Pin or 200Pin high-contact plugs, arranged in pairs.

The conversion board 153 includes a circuit board 1530, and a connector 1531 and a module interface group 1532 disposed on the circuit board 1530. The connector 1531 is connected to the connector 1511 to electrically and mechanically connect the receiving card 151 and the interposer 153; the module interface group 1532 is electrically connected to the connection part 1530 and each LED module 130 in the LED display unit 13, for example, by using a flat cable connection or a board-to-board connection to form an electrical connection with each LED module 130.

Referring to fig. 4, in another embodiment, the module controller 15a includes: a receiving card 151 and a receiving card 153. The receiving card 151 includes a circuit board 1510 and a connection 1511 provided on the circuit board 1510, a microcontroller 1512, a programmable logic device 1513, and

physical layer transceivers

1514b and 1514 c. Microcontroller 1512 and programmable logic device 1513 are electrically connected to connection 1511, programmable logic device 1513 is electrically connected to microcontroller 1512, and

physical layer transceivers

1514b and 1514c are electrically connected as a first physical layer transceiver group between programmable logic device 1513 and connection 1511.

Physical layer transceivers

1514b and 1514c are, for example, 1GBase-T, 2.5GBase-T, 5GBase-T or 10GBase-T ethernet physical layer transceiver chips, respectively, which may also be dual port ethernet physical layer transceiver chips.

The conversion board 153 includes a circuit board 1530, a connector 1531 disposed on the circuit board 1530, a module interface group 1532, physical layer transceivers 1514a and 1514d, and ethernet interfaces 1515a to 1515 d. The connector 1531 is connected to the connector 1511 to electrically and mechanically connect the receiving card 151 and the interposer 153; the module interface group 1532 is electrically connected to the connection part 1530 and each LED module 130 in the LED display unit 13, for example, by using a flat cable connection or a board-to-board connection to form an electrical connection with each LED module 130. Phy transceivers 1514a and 1514d serve as a second phy transceiver group, such as a 1GBase-T, 2.5GBase-T, 5GBase-T or 10GBase-T ethernet phy transceiver chip, respectively, which may also be a dual port ethernet phy transceiver chip. Ethernet interfaces 1515b and 1515c are electrically connected to the connection 1531 to form electrical connections with the

physical layer transceivers

1514b and 1514c, respectively, through the connection 1531 and the connection 1511; the

ethernet interfaces

1515a and 1515d are electrically connected to the connector 1531 through the physical layer transceivers 1514a and 1514d, respectively.

It should be noted that the receiving card mass production product circulating in the market at present is mainly the design of the dual ethernet physical layer transceiver, so the embodiment shown in fig. 4 can implement the dual channel transmission backup technical scheme by redesigning the adapter board under the condition that the hardware structure of the receiving card is not changed basically. For example, the function expansion pins and part of the RGB data group pins of the connector on the receiving card may be utilized, and the two physical layer transceiver chips and the four ports are all designed on the adapter board, so that the dual-channel transmission backup of the four ports is satisfied, and the hardware structure of the existing receiving card is also used continuously. Of course, it is understood that the arrangement of the physical layer transceivers 1514 a-1514 d and the ethernet interfaces 1515 a-1515 d on the receiving card 151 and the switch board 153 is not limited to that shown in fig. 3 and 4, and other arrangements may be used, such as two ethernet interfaces on the receiving card 151 and two other ethernet interfaces on the switch board 153.

Referring to fig. 5, a display control system 500 according to an embodiment of the present invention includes: a plurality of module controllers such as 15 a-15 c, a video distributor 51, a primary controller 53a and a backup controller 53 b.

Each

module controller

15a, 15b or 15c includes a programmable logic device, a physical layer transceiver group, a 1 st primary ethernet interface, a 2 nd primary ethernet interface, a 1 st backup ethernet interface, and a 2 nd backup ethernet interface, and the 1 st primary ethernet interface, the 2 nd primary ethernet interface, the 1 st backup ethernet interface, and the 2 nd backup ethernet interface electrically connect the programmable logic device through the physical layer transceiver group. As for the specific structure of each module controller 15 a-15 c, reference may be made to the embodiments shown in fig. 2, fig. 3 and fig. 4, and therefore, the detailed description thereof is omitted.

The video distributor 51 is adapted to access a video source, such as a one-in two-out video distributor or other one-in multiple-out video distributor, for outputting a video signal a and a video signal B having the same content.

The main controller 53a and the backup controller 53B are electrically connected to the video distributor 51 to receive the video signal a and the video signal B, and then process the received video signal a and the video signal B to obtain the image data signal a and the image data signal B having the same content. As one non-limiting embodiment, the main controller 53a and the backup controller 53b have the same hardware structure, and include, for example, a video interface, a video decoder, a second programmable logic device, an ethernet physical layer transceiver, and an ethernet interface. The video interface is used for receiving an input video signal, and is, for example, a standard digital video interface such as HDMI, DVI and the like; the video decoder is electrically connected between the video interface and the second programmable logic device and is, for example, an HDMI receiver, a DVI decoder, or the like; the ethernet physical layer transceiver is electrically connected between the second programmable logic device and the ethernet interface. The second programmable logic device is, for example, an FPGA device, the video decoder decodes an input video signal (e.g., video signal a or B) to obtain data and a control signal, the data and the control signal are transmitted to the FPGA, the FPGA performs buffering via an internal RAM and performs operations of changing a clock domain and converting a bit width to obtain an image data signal (e.g., image data signal a or B), and the image data signal is output via the ethernet physical layer transceiver and the ethernet interface in sequence.

In the above, the 1 st primary ethernet interface and the 1 st backup ethernet interface of the module controller 15a are electrically connected to the primary controller 53a and the backup controller 53b, respectively, the 2 nd primary ethernet interface of the module controller 15a is electrically connected to the 1 st primary ethernet interface of the module controller 15b, and the 2 nd backup ethernet interface of the module controller 15a is electrically connected to the 1 st backup ethernet interface of the module controller 15 b. Similarly, the 2 nd primary ethernet interface of the module controller 15b is electrically connected to the 1 st primary ethernet interface of the module controller 15c, and the 2 nd backup ethernet interface of the module controller 15b is electrically connected to the 1 st backup ethernet interface of the module controller 15 c.

In summary, the embodiment of the present invention provides a dual-channel transmission backup solution, which can solve the problem that the display of the system is unstable and reliable due to the easy damage of the network cable and the network port, such as the problem of a black screen.

In addition, as shown in fig. 6, based on the dual channel transmission backup solution, redundant backup can be further implemented, that is, the 2 nd primary ethernet interface of the last level module controller, such as 15c, is further connected to the primary controller 53a, and the 2 nd backup ethernet interface of the last level module controller 15c is connected to the backup controller 53 b. The effect of redundant backup is: when one module controller in one communication link is broken, signals can be transmitted from two directions of the whole communication link at the same time, and normal display of other display boxes except the display box with the broken module controller is ensured. Further, it is understood that, in fig. 6, the connection between the first-stage module controller 15a and the last-stage module controller 15c is not limited to one module controller 15b, and may be a connection of a plurality of module controllers.

In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An LED display screen, comprising:

the LED display device comprises a plurality of LED display units, a plurality of LED display units and a plurality of LED modules, wherein each LED display unit comprises one or more LED modules; and

a plurality of module controllers respectively electrically connected to the plurality of LED display units for driving and controlling the plurality of LED display units, wherein each of the module controllers includes a programmable logic device, a physical layer transceiver group, a first main ethernet interface, a second main ethernet interface, a first backup ethernet interface, and a second backup ethernet interface, and the first main ethernet interface, the second main ethernet interface, the first backup ethernet interface, and the second backup ethernet interface are electrically connected to the programmable logic device through the physical layer transceiver group;

the plurality of module controllers include a first module controller and a second module controller, the first primary ethernet interface and the first backup ethernet interface of the first module controller are respectively used for receiving two paths of image data signals with the same content, the second primary ethernet interface of the first module controller is electrically connected with the first primary ethernet interface of the second module controller, and the second backup ethernet interface of the first module controller is electrically connected with the first backup ethernet interface of the second module controller.

2. The LED display screen of claim 1, wherein the plurality of module controllers further comprises a third module controller, the first primary ethernet interface of the third module controller electrically connected to the second primary ethernet interface of the second module controller, and the first backup ethernet interface of the third module controller electrically connected to the second backup ethernet interface of the second module controller.

3. The LED display screen of claim 1, wherein each of the module controllers comprises:

the receiving card comprises a first circuit board, a first connecting piece, a microcontroller, the programmable logic device, the physical layer transceiver group, the first main Ethernet interface, the second main Ethernet interface, the first backup Ethernet interface and the second backup Ethernet interface, wherein the first connecting piece, the microcontroller, the programmable logic device and the second backup Ethernet interface are arranged on the first circuit board; and

the conversion board comprises a second circuit board, a second connecting piece and a module interface group, wherein the second connecting piece and the module interface group are arranged on the second circuit board, the second connecting piece is connected with the first connecting piece, and the module interface group is electrically connected with the second connecting piece and the LED display units.

4. The LED display screen of claim 1, wherein each of the module controllers comprises:

the receiving card comprises a first circuit board, a first connecting piece, a microcontroller, a programmable logic device, a first physical layer transceiver and a second physical layer transceiver, wherein the first connecting piece, the microcontroller, the programmable logic device and the first physical layer transceiver and the second physical layer transceiver are arranged on the first circuit board; and

the conversion board comprises a second circuit board, and a second connecting piece, a module interface group, a third physical layer transceiver and a fourth physical layer transceiver in the physical layer transceiver group, a first main Ethernet interface, a second main Ethernet interface, a first backup Ethernet interface and a second backup Ethernet interface which are arranged on the second circuit board, wherein the second connecting piece is connected with the first connecting piece, the module interface group is electrically connected with the second connecting piece and the plurality of LED display units, and the third physical layer transceiver and the fourth physical layer transceiver are electrically connected with the programmable logic device through the second connecting piece and the first connecting piece; two of the first main ethernet interface, the second main ethernet interface, the first backup ethernet interface, and the second backup ethernet interface are electrically connected to the first physical layer transceiver and the second physical layer transceiver respectively through the second connector and the first connector, and the other two are electrically connected to the third physical layer transceiver and the fourth physical layer transceiver respectively.

5. A display control system, comprising:

a plurality of module controllers, wherein each of the module controllers comprises a programmable logic device, a physical layer transceiver group, a first primary Ethernet interface, a second primary Ethernet interface, a first backup Ethernet interface, and a second backup Ethernet interface, and the first primary Ethernet interface, the second primary Ethernet interface, the first backup Ethernet interface, and the second backup Ethernet interface electrically connect the programmable logic device through the physical layer transceiver group;

a video distributor; and

the main controller and the backup controller are respectively and electrically connected with the video distributor;

the plurality of module controllers include a first module controller and a second module controller, the first primary ethernet interface and the first backup ethernet interface of the first module controller are electrically connected to the primary controller and the backup controller, respectively, the second primary ethernet interface of the first module controller is electrically connected to the first primary ethernet interface of the second module controller, and the second backup ethernet interface of the first module controller is electrically connected to the first backup ethernet interface of the second module controller.

6. The display control system of claim 5, wherein the plurality of module controllers further comprises a third module controller, the first primary Ethernet interface of the third module controller being electrically connected to the second primary Ethernet interface of the second module controller, and the first backup Ethernet interface of the third module controller being electrically connected to the second backup Ethernet interface of the second module controller.

7. The display control system of claim 6, wherein the second Ethernet interface of the third module controller is electrically connected to the primary controller and the second backup Ethernet interface of the third module controller is electrically connected to the backup controller.

8. The display control system of claim 5, wherein each of the module controllers comprises:

9. The display control system of claim 5, wherein each of the module controllers comprises:

10. A receiving card, comprising: the circuit board is provided with a connecting piece, a microcontroller, a programmable logic device, a physical layer transceiver group, a first main Ethernet interface, a second main Ethernet interface, a first backup Ethernet interface and a second backup Ethernet interface, wherein the connecting piece is electrically connected with the microcontroller, the programmable logic device is electrically connected with the microcontroller, and the programmable logic device is electrically connected with the first main Ethernet interface, the second main Ethernet interface, the first backup Ethernet interface and the second backup Ethernet interface through the physical layer transceiver group.

11. A module controller, comprising:

the receiving card comprises a first circuit board, a first connecting piece, a microcontroller, a programmable logic device and a first physical layer transceiver group, wherein the first connecting piece, the microcontroller, the programmable logic device and the first physical layer transceiver group are arranged on the first circuit board; and

the conversion board comprises a second circuit board, and a second connecting piece, a module interface group, a second physical layer transceiver group, a first main Ethernet interface, a second main Ethernet interface, a first backup Ethernet interface and a second backup Ethernet interface which are arranged on the second circuit board, wherein the second connecting piece is connected with the first connecting piece, the module interface group is electrically connected with the second connecting piece, and the second physical layer transceiver group is electrically connected with the programmable logic device through the second connecting piece and the first connecting piece; and two of the first main Ethernet interface, the second main Ethernet interface, the first backup Ethernet interface and the second backup Ethernet interface are respectively and electrically connected with the first physical layer transceiver group through the second connecting piece and the first connecting piece, and the other two are respectively and electrically connected with the second physical layer transceiver group.