CN115629728A - LED spliced display screen control system - Google Patents
LED spliced display screen control system Download PDFInfo
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- CN115629728A CN115629728A CN202211095376.6A CN202211095376A CN115629728A CN 115629728 A CN115629728 A CN 115629728A CN 202211095376 A CN202211095376 A CN 202211095376A CN 115629728 A CN115629728 A CN 115629728A
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
- G06F15/163—Interprocessor communication
- G06F15/17—Interprocessor communication using an input/output type connection, e.g. channel, I/O port
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Abstract
The invention discloses an LED (light emitting diode) spliced display screen control system which comprises a sending card and a plurality of receiving cards, wherein the sending card is respectively in wireless communication connection with the receiving cards, the sending card comprises a data input interface and a data output interface, the receiving cards are cascaded between the data output interface and the data input interface of the sending card, video signals sent by the data output interface of the sending card sequentially pass through the receiving cards and then return to the data input interface of the sending card, when the data input interface of the sending card does not receive the returned video signals, the data input interface of the sending card and the data output interface of the sending card simultaneously send the video signals, and the receiving card connected with the data input interface of the sending card reversely forwards the received video signals to the next receiving card connected with the receiving card. The LED tiled display screen control system has the advantage of good signal transmission stability.
Description
Technical Field
The invention relates to the field of LED spliced display screens, in particular to an LED spliced display screen control system.
Background
The LED tiled display screen is a large tiled display screen formed by splicing a plurality of independent LED display screens, can be used as a display independently, can be spliced into an ultra-large screen for use, can realize variable-size and variable-size large-screen functions according to different use requirements, and is generally used in various meeting rooms and monitoring rooms. A receiving card is provided in each individual LED display screen to receive the displayed image. The images of the plurality of individual LED display screens are stitched together to form a large screen image to be displayed.
As shown in fig. 1, a control system of an existing LED tiled display screen generally adopts a receiving card cascade mode to transmit data. In use, if the cascade line is broken or the plug is in poor contact, the data transmission is interrupted, the screen display is abnormal, and no data link backup exists, so that the data transmission quality is unstable.
Disclosure of Invention
The invention aims to provide the LED tiled display screen control system which can improve the stability of data transmission and has good stability, aiming at the defect that the data transmission is interrupted due to the damage of a cascade line in the LED tiled display screen control system in the prior art.
The embodiment of the invention provides an LED spliced display screen control system which comprises a sending card and a plurality of receiving cards, wherein the sending card is used for sending a video source to the receiving cards, the receiving cards are respectively connected with all LED display screens forming the LED spliced display screen and used for extracting video signals of corresponding areas from the video signals sent by the sending card according to set screen splicing parameters and displaying the video signals to the corresponding LED display screens,
the transmitting card is respectively in wireless communication connection with the plurality of receiving cards, the transmitting card comprises a data input interface and a data output interface, the plurality of receiving cards are cascaded between the data output interface and the data input interface of the transmitting card, video signals sent by the data output interface of the transmitting card are sequentially forwarded by the plurality of receiving cards and then return to the data input interface of the transmitting card, when the data input interface of the transmitting card does not receive the returned video signals, the data input interface of the transmitting card and the data output interface of the transmitting card simultaneously send the video signals, and the receiving card connected with the data input interface of the transmitting card reversely forwards the received video signals to the next receiving card connected with the receiving card.
In the embodiment of the invention, the sending card and the receiving card both comprise a wireless module for establishing wireless communication connection, and the sending module sends wireless signals to the receiving card in a broadcasting mode.
In the embodiment of the present invention, the receiving card includes a data input interface and a data output interface, the data transmission direction of the receiving card is from the data input interface to the data output interface, and when the data input interface of the receiving card cannot receive the video signal sent by the previous cascaded receiving card, the receiving card changes the data transmission direction to be from the data output interface to the data input interface.
In the embodiment of the present invention, the sending card is further provided with an image compression module, which is used for performing compression coding on a video image to be sent.
In the embodiment of the present invention, the receiving card is further provided with an image decoding module, which is used for decoding the compressed video image.
In the embodiment of the invention, the image decoding module is realized by adopting a CPU and/or an FPGA.
In the embodiment of the invention, the image compression module is realized by adopting a CPU and/or an FPGA.
In an embodiment of the present invention, the LED tiled display screen control system further includes:
and the upper computer is used for setting the screen splicing parameters of each receiving card.
In the embodiment of the invention, when the upper computer performs screen splicing setting, the sending card sends a screen splicing instruction to the plurality of receiving cards, the plurality of receiving cards respectively display the identification addresses of the receiving cards on respective screens after receiving the screen splicing instruction, the upper computer identifies the identification address of each receiving card and the position of the corresponding LED display screen in the LED splicing display screen according to the shot image of the LED splicing display screen, sets screen splicing parameters for each receiving card according to the identification addresses, and sends the screen splicing parameters to each receiving card through the identification address of the receiving card.
In the embodiment of the present invention, the identification address of the receiving card includes a MAC address, an IP address, or a self-defined identifier.
Compared with the prior art, in the LED spliced display screen control system, the sending card is connected with each receiving card in a wired mode and is also connected with each receiving card in a wireless mode, and the stability of data transmission is improved through dual communication guarantee; in addition, the receiving cards are sequentially connected between the data output interface and the data input interface of the sending card through data lines to form a loop backup, when the data input interface of the sending card does not receive a returned video signal, the data input interface of the sending card and the data output interface of the sending card simultaneously send the video signal, when a certain wired connection interface is interrupted, video data can be guaranteed to be sent to each receiving card, and the stability of data transmission is further improved; and finally, when the upper computer performs screen splicing setting, the upper computer sends a splicing screen instruction to the receiving cards through the sending card, after the receiving cards receive the splicing screen instruction, the receiving cards respectively display the identification addresses of the receiving cards on respective screens, the upper computer identifies the identification addresses of the receiving cards and the positions of the corresponding LED display screens in the LED splicing display screens according to the shot images of the LED splicing display screens and sets screen splicing parameters for the receiving cards according to the positions, and the screen splicing parameters of the receiving cards can be set quickly and conveniently.
Drawings
FIG. 1 is a schematic diagram of a prior art LED tiled display screen control system;
FIG. 2 is a schematic diagram of a control system for an LED tiled display screen according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a transmitter card according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a receiving card according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a control system for an LED tiled display screen according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of a control system for an LED tiled display screen according to another embodiment of the present invention.
Detailed Description
As shown in fig. 2, in an embodiment of the present invention, an LED tiled display screen control system is provided, which includes an upper computer, a sending card and a plurality of receiving cards. The transmitting card is used for transmitting a video source to the plurality of receiving cards. The receiving card is respectively connected with each LED display screen forming the LED splicing display screen and used for extracting the video signals of the corresponding area from the video signals sent by the sending card according to the set screen splicing parameters and displaying the video signals to the corresponding LED display screen. The screen splicing parameters comprise the coordinates and the display area of the LED display screen corresponding to the sending card in the LED splicing display screen. The upper computer is in communication connection with the sending card and is used for setting screen splicing parameters of each receiving card. The upper computer may be a mobile phone or a computer with control software installed thereon, and the upper computer may be in communication connection with the sending card in a wireless manner or in communication connection with the sending card in a wired manner, which is not limited in the present invention.
The transmitting card and the receiving card in the transmitting card and the receiving card both comprise a wireless module used for establishing wireless communication connection, and the transmitting module transmits wireless signals to the receiving card in a broadcasting mode.
The sending card and the receiving card both comprise a data input interface and a data output interface, in this embodiment, both the data input interface and the data output interface adopt RJ45 network interfaces. The data input interface and the data output interface of each receiving card are in communication connection through a circuit inside the receiving card. The receiving cards are cascaded between the data output interface and the data input interface of the sending card through the data lines. In the embodiment of the invention, the stability of data transmission between the sending card and the receiving card is improved in a mode of double data connection of wired connection and wireless connection. It should be noted that, if the receiving card receives an effective wireless video signal and a wired video signal at the same time, one path of signal is selected from the wireless video signal and the wired video signal for processing.
When the data input interface of the sending card does not receive the returned video signal, the data input interface of the sending card and the data output interface of the sending card simultaneously send the video signal, and the receiving card connected with the data input interface of the sending card reversely forwards the received video signal to the next receiving card connected with the receiving card. It should be noted that, under normal conditions, the internal data transmission direction of the receiving card is from the data input interface to the data output interface, when the data input interface of the receiving card cannot receive the video signal sent by the previous cascaded receiving card, that is, when the connection between the receiving cards at a certain position is interrupted, the receiving card changes the data transmission direction to be transmitted from the data output interface to the data input interface, and at this time, the video signal sent by the data input interface of the sending card can be reversely transmitted to the receiving card with the interrupted connection. By the mode, when the wired connection in the plurality of receiving cards is interrupted, the video data can be sent to each receiving card, and the stability of data transmission is further improved.
As shown in fig. 3 and 4, in the embodiment of the present invention, the transmitting card is further provided with a video input interface and an image compression module. The video input interface is used for receiving a video image source for the LED tiled display screen to display, and is generally an HDMI, DP or SDI interface. The image compression module is used for compressing and encoding a video image to be transmitted, and can be realized by a CPU and/or an FPGA. The receiving card is also provided with an image decoding module and a screen lighting circuit. The image decoding module is used for decoding the compressed video image, and can be realized by a CPU and/or an FPGA. And the screen lighting circuit is used for lighting and displaying the corresponding LED display screen according to the decoded video image.
In the prior art, the video data transmitted from the sending card to the receiving card is usually RGB luminance data after video decoding, and the bandwidth of one gigabit network cable can only transmit RGB luminance data of 65 ten thousand pixels at most. In the application of a 2K/4K/8K display screen with large resolution, the required network cables are many, about 4 network cables are required for 2K videos, about 16 network cables are required for 4K videos, about 64 network cables are required for 8K videos, and the number of the network cables is too many, so that the wiring is inconvenient, and the use cost is high. In the embodiment of the invention, the video data is compressed and then transmitted, so that the data flow is reduced, and the data of the 8K display screen can be transmitted by one gigabit network cable.
After a large-scale LED spliced display screen is installed, each LED display screen is randomly installed at any position of the LED spliced display screen, and the control system does not know the position of the LED display screen corresponding to each receiving card in the LED spliced display screen, so that after the LED spliced display screen is initially installed, the displayed pictures are disordered and a complete picture cannot be normally displayed. Therefore, before normal use, the actual position of the display screen controlled by each receiving card needs to be determined, and in the prior art, the actual position is usually checked one by one manually and adjusted, which is time-consuming and labor-consuming. After the actual position of the display screen controlled by each receiving card is determined, an address needs to be allocated to each receiving card, and a communication address is allocated to each receiving card usually through a handshake communication mechanism, so that software and hardware resources with a data return function need to be arranged for each receiving card, and the cost is increased.
In the embodiment of the invention, in order to solve the problem of disorder of the receiving cards, when the upper computer performs screen splicing setting, the sending card sends a screen splicing instruction to the receiving cards, the receiving cards respectively display the identification addresses of the receiving cards on the respective screens after receiving the screen splicing instruction, the upper computer identifies the identification address of each receiving card and the position of the corresponding LED display screen in the LED splicing display screen according to the shot image of the LED splicing display screen and sets the screen splicing parameters of each receiving card according to the identification addresses, and then the screen splicing parameters are sent to the receiving cards through the identification addresses of the receiving cards, so that the screen splicing parameters of the receiving cards can be set. By adopting the mode to set the screen splicing parameters of the receiving cards, the screen splicing parameters of each receiving card can be quickly and conveniently set, and the communication addresses of the receiving cards do not need to be set, so that the uplink communication software and hardware resources do not need to be set, and the cost is saved. In the embodiment of the present invention, the identification address of the receiving card includes a MAC address, an IP address, or a self-defined identifier.
The LED tiled display screen control system of the present invention is not limited to the above embodiment, and can be implemented in other ways. For example, as shown in fig. 5, another embodiment of the present invention provides an LED tiled display screen control system including a plurality of sending cards, each sending card being in communication connection with a set of receiving cards in a wireless and wired manner, respectively. As shown in fig. 6, a system for controlling an LED tiled display screen according to another embodiment of the present invention includes a sending card having a plurality of data channels, each of the data channels being in communication connection with a receiving card in a wireless or wired manner.
In summary, in the LED tiled display screen control system of the present invention, the sending card is connected to each receiving card not only in a wired manner, but also in a wireless manner, and the stability of data transmission is improved through dual communication guarantee; in addition, the receiving cards are sequentially connected between the data output interface and the data input interface of the sending card through data lines to form a loop backup, when the data input interface of the sending card does not receive a returned video signal, the data input interface of the sending card and the data output interface of the sending card simultaneously send the video signal, and when the wired connection at a certain position is interrupted, the video data can be ensured to be sent to each receiving card, so that the stability of data transmission is further improved; and finally, when the upper computer performs screen splicing setting, the upper computer sends a splicing screen instruction to the receiving cards through the sending card, after the receiving cards receive the splicing screen instruction, the receiving cards respectively display the identification addresses of the receiving cards on respective screens, the upper computer identifies the identification addresses of the receiving cards and the positions of the corresponding LED display screens in the LED splicing display screens according to the shot images of the LED splicing display screens and sets screen splicing parameters for the receiving cards according to the positions, and the screen splicing parameters of the receiving cards can be set quickly and conveniently.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An LED spliced display screen control system is characterized by comprising a sending card and a plurality of receiving cards, wherein the sending card is used for sending a video source to the receiving cards, the receiving cards are respectively connected with all LED display screens forming the LED spliced display screen and used for extracting video signals of corresponding areas from the video signals sent by the sending card according to set screen splicing parameters and displaying the video signals to the corresponding LED display screens,
the sending card is respectively in wireless communication connection with the plurality of receiving cards, the sending card comprises a data input interface and a data output interface, the plurality of receiving cards are cascaded between the data output interface and the data input interface of the sending card, video signals sent by the data output interface of the sending card are forwarded sequentially through the plurality of receiving cards and then return to the data input interface of the sending card, when the data input interface of the sending card does not receive the returned video signals, the data input interface of the sending card and the data output interface of the sending card simultaneously send the video signals, and the receiving card connected with the data input interface of the sending card forwards the received video signals reversely to the next receiving card connected with the receiving card.
2. The LED tiled display screen control system of claim 1 wherein the transmitter card and the receiver card each include a wireless module for establishing a wireless communication link, the transmitter module transmitting wireless signals to the receiver card by broadcast.
3. The LED tiled display screen control system of claim 1, wherein the receiving card comprises a data input interface and a data output interface, the data transmission direction of the receiving card is from the data input interface to the data output interface, and when the data input interface of the receiving card fails to receive the video signal sent by the previous cascaded receiving card, the receiving card changes the data transmission direction to be forwarded from the data output interface to the data input interface.
4. The LED tiled display screen control system according to claim 1, wherein an image compression module is disposed in the transmitting card for compression-encoding a video image to be transmitted.
5. The LED tiled display screen control system of claim 4, wherein the receiving card has an image decoding module disposed therein for decoding compressed video images.
6. The LED tiled display screen control system of claim 5, wherein the image decoding module is implemented using a CPU and/or FPGA.
7. The LED tiled display screen control system of claim 4, wherein the image compression module is implemented using a CPU and/or FPGA.
8. The LED tiled display screen control system of claim 1, further comprising:
and the upper computer is used for setting the screen splicing parameters of each receiving card.
9. The LED tiled display screen control system according to claim 7, wherein when the upper computer performs screen tiled setting, the sending card sends a tiled screen command to the receiving cards, the receiving cards respectively display their own identification addresses on their respective screens after receiving the tiled screen command, and the upper computer recognizes the identification address of each receiving card and the position of its corresponding LED display screen in the LED tiled display screen according to the photographed image of the LED tiled display screen, sets screen tiled parameters for each receiving card accordingly, and sends the screen tiled parameters to each receiving card through the identification address of the receiving card.
10. The LED tiled display screen control system of claim 8 wherein the identification address of the receiving card includes a MAC address, an IP address, or a custom identifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211095376.6A CN115629728A (en) | 2022-09-05 | 2022-09-05 | LED spliced display screen control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211095376.6A CN115629728A (en) | 2022-09-05 | 2022-09-05 | LED spliced display screen control system |
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| Publication Number | Publication Date |
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| CN115629728A true CN115629728A (en) | 2023-01-20 |
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| CN202211095376.6A Pending CN115629728A (en) | 2022-09-05 | 2022-09-05 | LED spliced display screen control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116110350A (en) * | 2023-02-14 | 2023-05-12 | 北京显芯科技有限公司 | LED control system, electronic equipment and data processing method |
| CN118588031A (en) * | 2024-06-25 | 2024-09-03 | 北京显芯科技有限公司 | Backlight driving device and electronic equipment |
-
2022
- 2022-09-05 CN CN202211095376.6A patent/CN115629728A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116110350A (en) * | 2023-02-14 | 2023-05-12 | 北京显芯科技有限公司 | LED control system, electronic equipment and data processing method |
| CN116110350B (en) * | 2023-02-14 | 2023-08-11 | 北京显芯科技有限公司 | LED control system, electronic equipment and data processing method |
| CN118588031A (en) * | 2024-06-25 | 2024-09-03 | 北京显芯科技有限公司 | Backlight driving device and electronic equipment |
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