LED display screen control system

Abstract

The utility model provides an LED display screen control system. The LED display screen control system comprises a plurality of control cards which are electrically connected in sequence through high-speed signal interfaces; each control card is provided with a multimedia signal interface and a control network signal interface; wherein the multimedia signal interface of the first control card is connected to a multimedia signal source, and the control network signal interface of the first control card is connected to a network signal source; and the multimedia signal interface and the control network signal interface of one or more control cards between the first control card and the tail control card are suspended. The data can be adaptively controlled and displayed, so that any control card has the functions of a sending card and a receiving card, dependence on the sending card in the prior art is removed, a large number of network cables do not need to be used for being connected with the screen body, the number of wires in the screen body is reduced, and the redundancy of the control system is increased.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to an LED display control system. Background Art

[0002] Traditional LED display control systems consist of a transmitting card and several receiving cards. The transmitting card is connected to the receiving cards through multiple gigabit Ethernet ports of the transmitting card, and the transmitting card divides the video signal according to the loaded area and forwards it to the connected receiving cards. With the wide application of LED displays, the resolution requirements for the displays are getting higher and higher.

[0003] In the prior art, the transmitting card is usually installed in the cabinet in the computer room. At the same time, limited by the transmission bandwidth of the Ethernet port, a large number of long-distance network cables are required to connect between the transmitting card and the screen body, and the connection reliability is low; and during installation and debugging, due to the narrow bandwidth of the network cable, the display area needs to be divided into several areas, and the bandwidth of each network port needs to be calculated, and wiring and debugging are carried out according to the divided areas, and the technical requirements for installation and debugging are relatively high; at the same time, due to the large size of the transmitting card box, it cannot be directly embedded into the screen body, resulting in that the HDMI signal cannot directly enter the screen body, and it cannot meet the occasions requiring safety and reliability.

[0004] Therefore, it is necessary to provide an LED display control system to solve the above problems existing in the prior art. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of this application is to provide an LED display control system for solving the problem of inconvenient connection between the transmitting card and the screen body in the prior art.

[0006] To achieve the above purpose and other related purposes, this application provides an LED display control system, including:

[0007] Several control cards electrically connected in sequence through high-speed signal interfaces; each of the control cards is configured with a multimedia signal interface and a control network signal interface;

[0008] Wherein, the multimedia signal interface of the first control card accesses a multimedia signal source, and its control network signal interface accesses a network signal source; for one or more control cards located between the first control card and the last control card, their multimedia signal interfaces and control network signal interfaces are left floating.

[0009] In some embodiments of this application, the multimedia signal interface of the last control card accesses a multimedia signal source, and its control network signal interface accesses a network signal source to construct a ring topology structure.

[0010] In some embodiments of the present application, the control card is further configured with a programmable logic device, and the programmable logic device is electrically connected to the multimedia signal interface, the control network signal interface, and the high-speed signal interface respectively.

[0011] In some embodiments of the present application, the two high-speed signal interfaces are a first high-speed signal interface and a second high-speed signal interface respectively. The first high-speed signal interface of the first control card is left floating, and the second high-speed signal interface of the first control card is connected to the first high-speed interface of the next control card.

[0012] In some embodiments of the present application, the programmable logic device includes:

[0013] A multimedia signal receiving module, electrically connected to the multimedia signal interface;

[0014] A control signal receiving and sending module, electrically connected to the control network signal interface;

[0015] Two data receiving and sending modules, one of the data receiving and sending modules is electrically connected to the high-speed signal interface, and the other data receiving and sending module is left floating;

[0016] A first control module, electrically connected to the control signal receiving and sending module and one of the data receiving and sending modules respectively;

[0017] A second control module, electrically connected to the control signal receiving and sending module and one of the data receiving and sending modules respectively;

[0018] A display module, electrically connected to the multimedia signal receiving module and one of the data receiving and sending modules respectively.

[0019] In some embodiments of the present application, the programmable logic device includes a multimedia signal receiving module, a control signal receiving and sending module, two data receiving and sending modules, a first control module, a second control module, and a display module. The multimedia signal receiving module, the control signal receiving and sending module, and the first control module are left floating; both of the two data receiving and sending modules are electrically connected to the second control module and the display module.

[0020] In some embodiments of the present application, the control card is further provided with an LED display screen interface for connecting to the display module.

[0021] In some embodiments of the present application, the programmable logic device is an FPGA device.

[0022] In some embodiments of the present application, the high-speed signal interface is a Type-C interface or an optical fiber.

[0023] In some embodiments of the present application, the multimedia signal interface is an HDMI interface.

[0024] As described above, the LED display control system of the present application has the following beneficial effects:

[0025] A plurality of control cards are sequentially electrically connected through a high-speed signal interface. Each control card is configured with a multimedia signal interface and a control network signal interface. Among them, the multimedia signal interface of the first control card is connected to a multimedia signal source, and its control network signal interface is connected to a network signal source. Then, the first control card is adaptively configured as a sending card and a receiving card, that is, the first control card integrates the sending and receiving functions; for the control cards located between the first control card and the last control card, their multimedia signal interfaces and control network signal interfaces are left floating. Then, the control cards located between the first control card and the last control card implement the receiving card function. The LED display control system of the present invention can adaptively control data and display data, enabling any control card to have both the functions of a sending card and a receiving card, eliminating the dependence on the sending card in the prior art, without the need to use a large number of network cables to connect to the screen body, reducing the number of internal wiring in the screen body, and increasing the redundancy of the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It shows a schematic diagram of the LED display control system in an embodiment of the present application.

[0027] Figure 2 It shows a schematic diagram of the control card in an embodiment of the present application.

[0028] Figure 3 It shows a schematic diagram of signal transmission when the control card is configured as a sending card and a receiving card in an embodiment of the present application.

[0029] Figure 4 It shows a schematic diagram of signal transmission when the control card is configured as a receiving card in an embodiment of the present application.

[0030] Figure 5 It shows a schematic diagram of signal transmission of the programmable logic device when the control card is configured as a sending card and a receiving card in an embodiment of the present application.

[0031] Figure 6 It shows a schematic diagram of signal transmission of the programmable logic device when the control card is configured as a receiving card in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following describes the implementation manners of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] In the embodiments of the present application, terms such as "first" and "second" are used to distinguish identical or similar items with basically the same functions and roles. For example, the first XX and the second XX are only used to distinguish different XX, and do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and terms such as "first" and "second" do not necessarily mean different.

[0034] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific manner.

[0035] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (item)" or its similar expression below refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b or c can represent: a, b, c, a - b, a - c, b - c or a - b - c, where a, b, c can be single or multiple.

[0036] Before further elaborating on the present utility model in detail, the nouns and terms involved in the embodiments of the present utility model are described. The nouns and terms involved in the embodiments of the present utility model are applicable to the following explanations:

[0037] <1>FPGA (Field-Programmable Gate Array): FPGA adopts the concept of Logic Cell Array (LCA). It consists of three parts: Configurable Logic Block (CLB), Input Output Block (IOB), and Interconnect. FPGA is a programmable device. It uses small look-up tables (16×1 RAM) to implement combinational logic. Each look-up table is connected to the input of a D flip-flop, and the flip-flop then drives other logic circuits or I / O, thus forming a basic logic unit module that can implement both combinational logic functions and sequential logic functions. These modules are interconnected by metal wires or connected to the I / O module. The logic of FPGA is realized by loading programming data into internal static storage units. The values stored in the memory cells determine the logic functions of the logic units and the connection methods between modules or between modules and I / O, and ultimately determine the functions that FPGA can achieve. FPGA allows programming an unlimited number of times.

[0038] <2>Type-C interface: It is a hardware interface specification of the Universal Serial Bus (USB). It is a connection surface of the USB interface and can be inserted regardless of the front or back. It supports functions such as charging, data transmission, and display output according to the USB standard.

[0039] <3>HDMI (High Definition Multimedia Interface): HDMI is a digital video / audio interface standard used to transmit high-definition video and multi-channel audio data.

[0040] <4>Transmission card and receiving card: They are the bridges between the controller and the LED display screen. The transmission card is responsible for transmitting the signals and data sent by the controller to the receiving card, and the receiving card then passes the data to the LED display screen.

[0041] For ease of understanding the embodiments of the present application, the following will be combined with Figures 1 - 6 described in detail.

[0042] As Figures 1 - 2 shown, the LED display control system provided by the present application includes: a plurality of control cards 10 electrically connected in sequence through high-speed signal interfaces. Each control card 10 is configured with a multimedia signal interface 11 and a control network signal interface 12. The multimedia signal interface 11 is used to input multimedia signals, and the control network signal interface 12 is used to input control network signals.

[0043] Among them, the multimedia signal interface 11 of the first control card 10 accesses the multimedia signal source, and its control network signal interface 12 accesses the network signal source. It will automatically work in two modes: the sending card and the receiving card, integrating the sending and receiving functions. For the control card 10 located between the first control card 10 and the last control card 10, its multimedia signal interface 11 and control network signal interface 12 are left floating, and it will work in the receiving card mode.

[0044] Specifically, for example, the LED display control system is set with sixteen control cards 10. The multimedia signal interface 11 of the first control card 10 accesses the multimedia signal source, and its control network signal interface 12 accesses the network signal source. It is used as the sending card. At the same time, the first control card 10 is also used as the receiving card of the current chassis. That is, the first control card has both the functions of the sending card and the receiving card. There is no need to use a large number of network cables to connect the sending card and the screen body, reducing the number of wirings inside the screen body. For the second, third, fourth... fifteenth, and sixteenth control cards 10, their multimedia signal interfaces 11 and control network signal interfaces 12 are left floating, that is, they do not access the multimedia signal and the control network signal, and are only used as receiving cards.

[0045] In an embodiment, the multimedia signal interface 11 of the last control card 10 accesses the multimedia signal source, and its control network signal interface 12 accesses the network signal source to construct a ring-shaped topology structure. Specifically, if the signal ring network backup function is needed, the multimedia signal interface 11 of the sixteenth control card 10 also accesses the multimedia signal source, and its control network signal interface 12 also accesses the network signal source, and is used as the backup sending card. It can be seen from this that the last control card 10 (the sixteenth control card 10) can be both a control card 10 with both sending and receiving functions and a control card 10 only used for receiving functions.

[0046] Such as Figure 2 、 Figure 3 and Figure 4 As shown, in an embodiment, the high-speed signal interface 15 of the control card 10 is set to two paths. Thus, each control card 10 is electrically connected through two high-speed signal interfaces 15. The two high-speed signal interfaces 15 are respectively the first high-speed signal interface and the second high-speed signal interface. Exemplarily, the cascaded high-speed signal interface in front is defined as the first high-speed signal interface, and the cascaded high-speed signal interface behind is defined as the second high-speed signal interface. Then, the first high-speed signal interface of the first control card 10 is left floating, and its second high-speed signal interface is connected to the first high-speed interface of the subsequent control card 10. That is, the second high-speed signal interface of the first control card 10 is electrically connected to the first high-speed signal interface of the second control card 10, and the second high-speed signal interface of the second control card 10 is electrically connected to the first high-speed signal interface of the third control card 10... and so on, which will not be elaborated here.

[0047] In a specific embodiment, the high-speed signal interface 15 is a Type-C interface or is connected using an optical fiber interface. Selecting a Type-C interface or an optical fiber is simple to operate while meeting the requirements of high-speed signal transmission.

[0048] As Figure 2 shown, in one embodiment, the control card 10, whether it is only for receiving functions or for both receiving and transmitting functions, is configured with a programmable logic device 13. The programmable logic device 13 is electrically connected to the multimedia signal interface 11, the control network signal interface 12, and the high-speed signal interface 15 respectively. By designing the programmable logic device 13, data processing is provided for the LED display control system of the present invention, enabling any control card 10 to simultaneously implement the functions of a sending card and a receiving card.

[0049] As Figures 5 - 6 shown and with reference to Figure 2 , in one embodiment, the programmable logic device 13 includes: a multimedia signal receiving module 131, a control signal receiving and sending module 132, two-way data receiving and sending modules 133, a first control module 134, a second control module 135, and a display module 136.

[0050] As Figure 3 and Figure 5 shown, the current control card 10 operates in two modes: sending and receiving. The specific signal transmission is as follows:

[0051] (1) Receive control signals from the control network signal interface 12, deliver the received control signals to the first control module 134 and the second control module 135 of the current device itself, and forward the control signals to the high-speed signal interface 15 for use by the remaining control cards; at the same time, reply packets from the first control module 134 and the second control module 135 of itself and reply packets of control signals from the remaining control cards received from the high-speed signal interface 15 are replied to the upper device through the control network signal interface 12.

[0052] (2) Receive the current audio-video source signal from the multimedia signal interface 11, deliver the received audio-video source signal to the display module 136 of itself, and forward the display signal to the high-speed signal interface 15 for use by the remaining control cards 10.

[0053] (3) The high-speed signal interface 15 is responsible for sending the control signals of the control network signal interface 12 and the display data signals received from the multimedia signal interface 11, as well as the control signals from the first control module 134 to the other control cards 10; at the same time, it receives the control signal reply packets from the other control cards 10 through the high-speed signal interface 15 and sends them to its own first control module 134 or the control signal sending module; if the current LED display control system supports the ring network mode, in addition to the above functions, it is still necessary to receive the display signals and control signals from the other transmitting cards through the high-speed signal interface 15 and send them to its own second control module 135 and display module 136.

[0054] As Figure 4 and Figure 6 shown, the current control card 10 is working in the receiving mode, and its specific signal transmission is as follows:

[0055] The two high-speed signal interfaces 15 simultaneously receive the control signals and display data signals, deliver the signals to its own second control module 135 and display module 136 respectively, and also need to forward the received signals to the other high-speed signal interface 15 for use by the other receiving cards; at the same time, it returns the reply packet of its own second control module 135 to the upper transmitting card unit or the control network port unit through the received high-speed signal interface 15.

[0056] As Figure 5 shown and in combination with reference Figure 2 , in an embodiment, when the control card 10 serves as both a transmitting card and a receiving card at the same time, the specific connections of the modules in the programmable logic device 13 are as follows: The multimedia signal receiving module 131 is electrically connected to the multimedia signal interface 11 to access the multimedia signal source, so as to receive the required display data information. The control signal receiving and sending module 132 is electrically connected to the control network signal interface 12 to access the network signal source, that is, to receive the control signals, and at the same time can send the reply information to the upper control device. One of the data receiving and sending modules 133 is electrically connected to the high-speed signal interface 15 to receive the control signals and multimedia signals, and at the same time can send the received information to the next control card 10, and the other data receiving and sending module 133 is left floating. The first control module 134 is electrically connected to the control signal receiving and sending module 132 and one of the data receiving and sending modules 133 respectively, so as to control the control card 10 to realize the function of the transmitting card. The second control module 135 is electrically connected to the control signal receiving and sending module 132 and one of the data receiving and sending modules 133 respectively, so as to control the control card 10 to realize the function of the receiving card. The display module 136 is electrically connected to the multimedia signal receiving module 131 and one of the data receiving and sending modules 133 respectively, and receives the display data for display on the LED display screen.

[0057] As Figure 6 shown and in combination with reference Figure 2, in one embodiment, the control card 10 is only used as a receiving card. At this time, the multimedia signal receiving module 131, the control signal receiving and sending module 132, and the first control module 134 of the programmable logic device 13 are left floating, and both data receiving and sending modules 133 are electrically connected to the second control module 135 and the display module 136.

[0058] To facilitate a detailed description of the data processing process of the programmable logic device 13, the control signal receiving and sending module 132 is divided into a control signal sending module and a control signal receiving module, and the data receiving and sending module 133 is divided into a data receiving module and a data sending module.

[0059] As Figure 5 shown, when the control card 10 is used as both a sending card and a receiving card, the multimedia signal receiving module 131 receives the display data information required by the current LED display screen and sends the received data information to the display module 136 and the data sending module. The control signal receiving module receives the control signals from the upper control device, such as brightness information, layout information, etc., and sends the received control signals to the first control module 134, the second control module 135, and the data sending module. The control signal sending module forwards the reply information of the first control module 134, the reply information of the second control module 135, and the reply information of the second control module 135 of the connected control card 10 to the upper control device. The data sending module forwards the audio-video source information received by the multimedia signal receiving module 131, the control information received by the control signal receiving module, and the control information that the first control module 134 needs to send to the next control card 10 to the next control card 10. The data receiving module receives the control information and the display data information sent by the second control module 135 of the connected control card 10 and forwards them to the corresponding second control module 135, the control signal sending module, and the display module 136. The first control module 134 receives the control information received from the upper end through the control signal receiving module and replies, and sets the relevant parameters for the subsequent control card 10 to be used as a receiving card. The second control module 135 receives the control information received from the upper end through the control signal receiving module or the data receiving module and replies. The display module 136 receives the display data from the multimedia signal receiving module 131 and the display data received by the data receiving module and selects the appropriate display data for use.

[0060] As Figure 6As shown, when the control card 10 is only used as a receiving card, the data sending module forwards the display data, control data received by the other data receiving module, and the reply information of the second control module 135 to the subsequent control card 10. The data receiving module receives the control information and display data information sent by the connected control card 10, throws the display data to the display module 136, gives the control information to the second control module 135, and at the same time forwards all the received data to the other data sending module. The second control module 135 receives the control information received by the two data receiving modules and replies. The display module 136 receives the display data received by the two data receiving modules and selects appropriate display data for use.

[0061] As Figure 2 and Figure 5 shown, in an embodiment, the control card 10 is further provided with an LED display screen interface 14 for connecting to the display module 136. The display module 136 sends the received display data to the LED display screen through the LED display screen interface 14 for specific display.

[0062] In an embodiment, the programmable logic device is an FPGA device. Selecting the FPGA device can be specifically designed according to specific requirements to achieve low-latency data processing.

[0063] In an embodiment, the multimedia signal interface is an HDMI interface. Selecting the HDMI interface can ensure the transmission of high-quality video and audio signals.

[0064] It is worth noting that an LED display screen control system provided by the present invention is a hardware system, which can be used alone or in combination with existing software programs, but the present invention itself does not involve any innovation in software technology.

[0065] In summary, several control cards are electrically connected in sequence through a high-speed signal interface. Each control card is configured with a multimedia signal interface and a control network signal interface. Among them, the multimedia signal interface of the first control card is connected to a multimedia signal source, and its control network signal interface is connected to a network signal source. Then, the first control card is adaptively configured as a transmitting card and a receiving card, that is, the first control card integrates the functions of transmitting and receiving. For the control cards located between the first control card and the last control card, their multimedia signal interfaces and control network signal interfaces are left floating. Then, the control cards located between the first control card and the last control card implement the function of receiving cards. At the same time, a programmable logic device is designed to provide an adaptive control data and display data exchange ability for the LED display control system of the present invention, so that any control card has the functions of a transmitting card and a receiving card, eliminating the dependence on the transmitting card in the prior art, without the need to use a large number of network cables to connect to the screen body, reducing the number of internal connections in the screen body, increasing the redundancy of the control system, and improving the reliability of the control system. Therefore, this application effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0066] The above embodiments are only illustrative of the principles and effects of this application and are not intended to limit this application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in this application should still be covered by the claims of this application.

Claims

1. A LED display screen control system, characterized in that: include: A plurality of control cards electrically connected in sequence through high-speed signal interfaces; each of the control cards is equipped with a multimedia signal interface and a control network signal interface; Wherein, the multimedia signal interface of the first control card is connected to a multimedia signal source, and the control network signal interface thereof is connected to a network signal source; The multimedia signal interface and the control network signal interface of one or more control cards located between the first control card and the rear control card are suspended.

2. The LED display screen control system according to claim 1, characterized in that: The multimedia signal interface of the tail control card is connected to a multimedia signal source, and the control network signal interface thereof is connected to a network signal source, so as to construct a ring-shaped topological structure.

3. The LED display screen control system according to claim 1, characterized in that: The control card is also configured with a programmable logic device, and the programmable logic device is electrically connected to the multimedia signal interface, the control network signal interface and the high-speed signal interface respectively.

4. The LED display screen control system according to claim 1, characterized in that: The two high-speed signal interfaces are respectively a first high-speed signal interface and a second high-speed signal interface. The first high-speed signal interface of the first control card is suspended, and the second high-speed signal interface of the first control card is connected to the first high-speed interface of the next control card.

5. The LED display screen control system according to claim 3, characterized in that: The programmable logic device comprises: A multimedia signal receiving module, electrically connected to the multimedia signal interface; A control signal receiving and sending module, electrically connected to the control network signal interface; Two data receiving and sending modules, one of which is electrically connected to the high-speed signal interface, and the other is suspended; A first control module is electrically connected to the control signal receiving and sending module and one of the data receiving and sending modules respectively; A second control module is electrically connected to the control signal receiving and sending module and one of the data receiving and sending modules respectively; The display module is electrically connected to the multimedia signal receiving module and the data receiving and sending module.

6. The LED display screen control system according to claim 3, characterized in that: The programmable logic device includes a multimedia signal receiving module, a control signal receiving and sending module, two data receiving and sending modules, a first control module, a second control module and a display module. The multimedia signal receiving module, the control signal receiving and sending module and the first control module are suspended; the two data receiving and sending modules are electrically connected to the second control module and the display module.

7. The LED display screen control system according to claim 5 or 6, characterized in that: The control card is also provided with an LED display screen interface for connecting with the display module.

8. The LED display screen control system according to claim 3, characterized in that: The programmable logic device is an FPGA device.

9. The LED display screen control system according to claim 1, characterized in that: The high-speed signal interface is a Type-C interface or an optical fiber interface.

10. The LED display screen control system according to claim 1, characterized in that: The multimedia signal interface is a HDMI interface.

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