A data transmission system

Abstract

The application provides a data transmission system, which comprises a plurality of LED display devices and a controller, the LED display device comprises an input port and an output port, the input port comprises a first input port and a second input port, the first input port of the first LED display device is connected to the controller, the first input port of the other LED display device is connected to the output port of the previous LED display device, and the second input port of each LED display device is connected to the controller. Through the implementation of the application, after the data input into the two input ports is detected, data transmission can be carried out from the other undamaged data port when the device itself is damaged, the connection between the devices is damaged, and the connection between the device and the data bus is damaged, so that the reliability of the transmission system is effectively improved.

Description

Technical Field

[0001] This application relates to the field of data processing technology, and in particular to a data transmission system. Background Technology

[0002] In traditional LED display systems, two typical data transmission methods are serial and parallel. Serial connections offer advantages such as fewer device interfaces, stronger port driving capabilities, and faster transmission speeds. However, they also have significant drawbacks. For example, serial connections result in low data transmission reliability; a failure in one device or a damaged connection cable can render the entire system unusable. Parallel connections, on the other hand, offer greater reliability than serial connections. However, they also suffer from drawbacks such as device malfunction due to damaged connection cables. Therefore, both methods, when faced with damaged connections between devices or between devices and data lines, can lead to malfunctions in the device itself, other devices, or even the entire system. Thus, there is still room for improvement in the reliability of LED display systems. Summary of the Invention

[0003] The main objective of this application is to provide a data transmission system that can at least solve the problem of low reliability in data transmission methods in related technologies.

[0004] To achieve the above objectives, this application provides a data transmission system including multiple LED display devices and a controller. Each LED display device includes an input port and an output port. The input port includes a first input port and a second input port. The first input port of the first LED display device is connected to the controller. The first input ports of the other LED display devices are connected to the output port of the preceding LED display device. The second input ports of each LED display device are all connected to the controller.

[0005] The LED display device is configured to: when receiving input data based on the input port, perform a correctness check on the target input data, wherein the input data includes at least the input data sent by the controller; if the check passes, send the passed input data to the first input port of the next LED display device based on the output port; if the check fails, send a preset fixed level signal to the first input port of the next LED display device based on the output port, wherein the fixed level signal is used to instruct the next LED display device to perform a correctness check on the input data sent by the controller.

[0006] As can be seen from the above, in the data transmission system provided by this application, the controller is cascaded with N devices. The A port of the device is connected serially to the C port of the controller or other devices, and the B port of the device is connected in parallel to the data bus of the controller. When input data is received based on the input port, the correctness of the target input data is checked. If the check passes, the input data that has passed the check is sent to the first input port of the next LED display device based on the output port. If the check fails, a preset fixed level signal is sent to the first input port of the next LED display device based on the output port. Therefore, after checking the data input from two input ports, this embodiment can transmit data through the undamaged data port even if the device itself is damaged, the connection between devices is damaged, or the connection between the device and the data bus is damaged, effectively improving the reliability of the transmission system. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of a data transmission system provided in an embodiment of this application;

[0009] Figure 2 A circuit schematic diagram of the internal circuitry of an LED display device provided in an embodiment of this application;

[0010] Figure 3 A circuit schematic diagram of the first data detection switching circuit provided in the embodiments of this application;

[0011] Figure 4 A circuit schematic diagram of the second data detection switching circuit provided in the embodiments of this application;

[0012] Figure 5 A schematic diagram of a data structure for port input data provided in an embodiment of this application;

[0013] Figure 6 A circuit schematic diagram of an address programming circuit provided in an embodiment of this application;

[0014] Figure 7 This is a circuit schematic diagram of a data processing circuit provided in an embodiment of this application. Detailed Implementation

[0015] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0017] To address the low reliability of data transmission methods in related technologies, this application provides a data transmission system, such as... Figure 1 This is a schematic diagram of the data transmission system structure provided in this embodiment. The data transmission system includes: multiple LED display devices and a controller. Each LED display device includes an input port and an output port. The input port includes a first input port and a second input port. The first input port of the first LED display device is connected to the controller. The first input ports of other LED display devices are connected to the output ports of the preceding LED display devices. The second input ports of each LED display device are all connected to the controller.

[0018] The LED display device is used to: when receiving input data through the input port, perform a correctness check on the target input data, wherein the input data includes at least the input data sent by the controller; if the check passes, send the passed input data to the first input port of the next LED display device through the output port; if the check fails, send a preset fixed level signal to the first input port of the next LED display device through the output port, wherein the fixed level signal is used to instruct the next LED display device to perform a correctness check on the input data sent by the controller.

[0019] Specifically, in this embodiment, the LED display device includes three ports: a serially connected data input port A, a parallel connected data input port B, and a serially connected data output port C. The controller is cascaded with N LED display devices. The A port of the LED display device is serially connected to the C port of the controller or other LED display devices, and the B port is parallel connected to the data bus of the controller. The data transmitted by the controller to the A and B ports of device 1 is the same.

[0020] In this embodiment, when a first fault occurs—a connection failure between the LED display device and the data serial bus, for example, when the connection between port C of device 1 and port A of device 2 is damaged—the detection result of the data signal received by port A of device 2 is incorrect. However, port B of device 2 is connected to the data parallel bus, and the detection result of the data signal received by port B is correct. Therefore, device 2 outputs the correct data from port B to port A of device 3 through port C, ensuring the display of the entire system remains unaffected. When a second fault occurs—a connection failure between the device and the data parallel bus, for example, when the connection between port B of device 2 and the data bus is damaged—the detection result of the data signal received by port B is incorrect. However, port A of device 2 is connected to port C of device 1 to receive display data signals, and the detection result of the data signal received by port A of device 2 is correct. Device 2 outputs the correct A-port data signal to the A-port of device 3 via the C-port, ensuring the display of the entire system remains unaffected. In the event of a third fault (e.g., device 2 itself malfunctions, resulting in garbled data output from its C-port), the A-port of device 3 will receive the garbled signal. In this case, the handling method described for the first fault can be used to ensure the display of device 3 and the remaining devices remains unaffected. In the event of a fourth fault (e.g., both the A and B-port connections of device 2 are damaged, leading to incorrect data signal detection results from both A and B-ports), device 2 will transmit a fixed-level signal to its C-port. When the A-port of device 3 receives this fixed-level signal, the handling method described for the first fault will be used to ensure the display of the remaining devices remains unaffected. The controller in this embodiment can be a control system or control module composed of FPGA, STM32, C51 power supply chip, transmission chip, and other related chips. Furthermore, in a multi-level LED display system, the output port C of the Nth LED display device can be connected to another controller or left unconnected.

[0021] Furthermore, such as Figure 2 As shown, the LED display device includes a data detection and switching circuit, an address programming circuit, and a data processing circuit. The first end of the data detection and switching circuit is connected to the first input port, the second end is connected to the second input port, and the third end is connected to both the address programming circuit and the data processing circuit. The data detection and switching circuit is used to: detect the correctness of the target input data when input data is received based on the first and second ends; if the detection passes, the detected input data is sent to the address programming circuit and the data processing circuit based on the third end; if the detection fails, a preset fixed-level signal is sent to the address programming circuit and the data processing circuit based on the third end.

[0022] In this embodiment, the data detection switching circuit is used to detect the input data of port A and port B and transmit the correctly detected input signal or fixed level signal to the address programming circuit and the data processing circuit.

[0023] Furthermore, such as Figure 3 As shown, the data detection switching circuit includes a first data selector MUX1 and a second data selector MUX2.

[0024] Specifically, the first terminal of the first data selector MUX1 is connected to the first input port, the second terminal of the first data selector MUX1 is connected to the second input port, the third terminal of the first data selector MUX1 is connected to the first terminal of the second data selector MUX2, the second terminal of the second data selector MUX2 is used to connect to a fixed-level signal generator, and the third terminal of the second data selector MUX2 is connected to both the address programming circuit and the data processing circuit. The first data selector MUX1 is used to: transmit the first input data corresponding to the first input port to the second data selector when the first input data detection passes; and transmit the second input data corresponding to the second input port to the second data selector when the first input data detection fails. The second data selector MUX2 is used to: send the input data sent by the first data selector to the address programming circuit and the data processing circuit when the target input data detection passes; and send a fixed-level signal to the address programming circuit and the data processing circuit when the target input data detection fails.

[0025] In this embodiment, through the operations of the first data selector MUX1 and the second data selector MUX2 in the data detection and switching circuit, the data detection and switching circuit prioritizes transmitting port A data to MUX2; when the port A detection result is incorrect, MUX1 transmits port B data to MUX2; when either the port A or port B frame detection result is correct, MUX2 can transmit either port A or port B data to the address programming circuit and the data processing circuit; if both port A and port B detection results are incorrect, MUX2 will transmit a fixed-level signal to the address programming circuit and the data processing circuit. Similarly, port B data can also be prioritized for transmission according to actual needs.

[0026] Furthermore, such as Figure 4 As shown, the data detection switching circuit also includes a first data frame detection module, a second data frame detection module, and an NOR gate circuit.

[0027] Specifically, the first terminal of the NOR gate is connected to the first data frame detection module, the second terminal of the NOR gate is connected to the second data frame detection module, the third terminal of the NOR gate is connected to the fourth terminal C of the second data selector MUX2, and the fourth terminal C of the first data selector MUX1 is connected to the first data frame detection module. The first data selector MUX1 is specifically used for: transmitting the first input data to the second data selector MUX2 when it receives a level signal corresponding to the first input data detection passed from the first data frame detection module based on its fourth terminal C; and transmitting the first input data to the second data selector MUX2 when it receives a level signal corresponding to the first data frame detection passed from its fourth terminal C. When the module sends a level signal corresponding to the failure of the first input data detection, it transmits the second input data to the second data selector MUX2. The second data selector MUX2 is specifically used to: when it receives a level signal corresponding to the success of the target input data detection from the NOR gate circuit based on the fourth terminal C, it transmits the input data sent by the first data selector MUX1 to the address programming circuit and the data processing circuit; when it receives a level signal corresponding to the failure of the target input data detection from the NOR gate circuit based on the fourth terminal C, it transmits a fixed level signal to the address programming circuit and the data processing circuit.

[0028] In this embodiment, the multiplexer (two-to-one data selector) can output data S1 at port D when port C receives a level signal "0", and output data S2 at port D when port C receives a level signal "1". In this embodiment, when the detection result of the first data frame detection module is correct, it will send the corresponding level signal, such as "0", to port C of MUX1. At this time, MUX1 will output port A data. When the detection result of any data frame detection module is correct, the NOR gate will output a level signal "1" to port C of MUX2. Then, port D of MUX2 will output port A or port B data sent by MUX1.

[0029] Furthermore, the input terminal of the first data frame detection module is connected to the first input port, and the output terminal is connected to the first terminal of the NOR gate circuit and the fourth terminal C of the first data selector MUX1, respectively. The input terminal of the second data frame detection module is connected to the second input port, and the output terminal is connected to the second terminal of the NOR gate circuit. The first data frame detection module is used to: compare the target level sequence corresponding to the first input data with the preset level sequence; when the target level sequence matches the level sequence, it is determined that the first input data has been detected and the level signal corresponding to the first input data has been detected is sent to the NOR gate circuit and the first data selector MUX1. The second data frame detection module is used to: compare the target level sequence corresponding to the second input data with the preset level sequence; when the target level sequence matches the level sequence, it is determined that the second input data has been detected and the level signal corresponding to the second input data has been detected is sent to the NOR gate circuit.

[0030] Specifically, in this embodiment, the data structures transmitted by port A and port B are as follows: Figure 5 As shown, the correctness of the input data can be determined by comparing the high and low level sequences of the data recognition frames in the input data.

[0031] Furthermore, such as Figure 2 As shown, the input terminals of both the address programming circuit and the data processing circuit are connected to the third terminal of the data detection and switching circuit, and their output terminals are both connected to the output port of the LED display device. The address programming circuit is used to: store the address-type input data when the input data sent by the data detection and switching circuit is address-type, and send the address-type input data to the first input port of the next LED display device. The data processing circuit is used to: control the display of the LED display device according to the display-type input data when the input data sent by the data detection and switching circuit is display-type, and send the display-type input data to the first input port of the next LED display device.

[0032] In this embodiment, the LED display device performs initial address programming before displaying the input data. Specifically, after receiving the data transmitted by the data detection and switching unit, the address programming unit identifies the input data as address frame data through the address / display discrimination frame in the input data. If the address / display discrimination frame identifies the input data as not address frame data, the address programming unit does not operate. After programming, both ports A and B of the device receive the same display data. After processing by the data detection and switching circuit, the detected input data or fixed-level signal is transmitted to the data processing unit. When the data processing unit identifies the input data as display frame data through the address / display discrimination frame, it controls the display of the LED display device according to the display type input data and transmits the input data to the output port C. If the address / display discrimination frame results in a fixed-level signal, such as a low-level signal, the LED display is turned off and the fixed-level signal is transmitted to the output port C.

[0033] In this embodiment, the device, based on the traditional parallel connection system transmission application, multiplexes the serial connection line used for address programming into a data transmission line. The internal data detection and switching unit processes the data of the two transmission ports A and B of the LED display device. Specifically, it performs correctness detection on the input data to switch between the serial connection port and the parallel connection port for data transmission. Even if the device itself is damaged, the connection between devices is damaged, or the connection between the device and the data bus is damaged, data can still be transmitted through the undamaged data port, effectively improving the reliability of the transmission system.

[0034] Furthermore, the address programming circuit includes an address memory. Specifically, the address programming circuit is used to store the address-type input data into the address memory when the input data sent by the data detection and switching circuit is of the address type.

[0035] In this embodiment, an address memory, such as a read-only memory (ROM), can be configured within the LED display device to store address frame data.

[0036] Furthermore, such as Figure 6 As shown, the address programming circuit also includes a switching transistor, a fuse, and a resistor. Specifically, the first end of the switching transistor is connected to the third end of the data detection switching circuit, the second end of the switching transistor is connected to one end of the fuse, the third end of the switching transistor is connected to one end of the resistor, the other end of the fuse is connected to the power supply, the other end of the resistor is grounded, one end of the address memory is connected to one end of the fuse, and the other end is grounded.

[0037] In this embodiment, when the data transmitted through ports A and B is address-type data (address frame data), the data detection and switching unit transmits this data to the address programming unit and controls the opening and closing of the fuse via a switching transistor to write the transmitted address information into the address memory ROM. Then, the address-type data is transmitted to the next LED display device via output port C. During this programming process, the data processing unit does not operate. Furthermore, after programming the address, the device does not repeat the programming process; all subsequent received data is display-type data that needs to be processed. In this embodiment, the switching transistor can be a MOSFET.

[0038] Furthermore, the data processing circuit is specifically used to: read the corresponding device data field in the display input data according to the target programming address in the address memory, and perform display control on the LED display device according to the device data field.

[0039] Specifically, in this embodiment, when the data processing circuit receives the data transmitted by the data detection and switching circuit, if it determines that the data is display data through the address / display discrimination frame, it will read the required device data according to the address burned into the device and perform display control on the LED display device according to the device data.

[0040] Furthermore, such as Figure 7 As shown, the data processing circuit includes a digital signal processing circuit and an LED driving circuit. The first terminal of the digital signal processing circuit is connected to the address memory, the second terminal of the digital signal processing circuit is connected to the third terminal of the data detection and switching circuit, and the third terminal of the digital signal processing circuit is connected to the LED driving circuit.

[0041] Specifically, in this embodiment, after receiving the data transmitted by the data detection and switching circuit and determining that it is display data, the digital signal processing circuit will output a driving signal to the LED driving circuit (either a constant current or constant voltage driving circuit can be used).

[0042] Based on the above technical solution of the embodiments of this application, the data transmission system includes multiple LED display devices and a controller. Each LED display device includes an input port and an output port. The input port includes a first input port and a second input port. The first input port of the first LED display device is connected to the controller, and the first input ports of other LED display devices are connected to the output ports of the preceding LED display devices. The second input ports of each LED display device are all connected to the controller. The LED display devices are used to: when receiving input data through an input port, perform a correctness check on the target input data, wherein the input data includes at least the input data sent by the controller; if the check passes, send the passed input data to the first input port of the next LED display device through the output port; if the check fails, send a preset fixed-level signal to the first input port of the next LED display device through the output port, wherein the fixed-level signal is used to instruct the next LED display device to perform a correctness check on the input data sent by the controller. By implementing the solution of this application, when the connection between port C of device 1 and port A of device 2 in the data transmission system is damaged, device 1 sends data from port B to device 2, ensuring the normal display of device 2. Device 2 also outputs a correct data signal through port C to port A of device 3, thus ensuring the display of the entire system remains unaffected. When the connection between port B of device 2 and the data bus is damaged, device 2 sends data signals from port A, ensuring the normal display of device 2. Port C outputs a correct data signal to port A of device 3, ensuring the display of the entire system remains unaffected. When device 2 itself is damaged, device 3 receives and transmits data from port B, ensuring the display of device 3 and other devices remains unaffected. When the connection lines between ports A and B of device 2 are both damaged, a fixed-level signal is transmitted to device 3, enabling device 3 to receive and transmit data from port B, ensuring the display of other devices remains unaffected. Therefore, the embodiments of this application can effectively solve the fault situations of device self-damage, damage to connection lines between devices, and damage to connection lines between devices and the data bus, and effectively improve the reliability of data transmission.

[0043] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0044] The above describes the data transmission system provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A data transmission system, characterized in that, The system includes multiple LED display devices and a controller. Each LED display device includes an input port and an output port. The input port includes a first input port and a second input port. The first input port of the first LED display device is connected to the controller. The first input ports of the other LED display devices are connected to the output port of the preceding LED display device. The second input ports of each LED display device are all connected to the controller. The LED display device is configured to: when receiving input data, perform a correctness check on the target input data, wherein the input data includes at least the input data sent by the controller to the first input port and the second input port; if there is input data that passes the check, then the input data that passes the check is sent to the first input port of the next LED display device based on the output port; if the input data received through the first input port and the second input port fails the correctness check, then a preset fixed level signal is sent to the first input port of the next LED display device based on the output port, wherein the fixed level signal is used to instruct the next LED display device to perform a correctness check on the input data sent by the controller.

2. The data transmission system according to claim 1, characterized in that, The LED display device includes a data detection and switching circuit, an address programming circuit, and a data processing circuit; the first end of the data detection and switching circuit is connected to the first input port, the second end is connected to the second input port, and the third end is connected to the address programming circuit and the data processing circuit respectively. The data detection switching circuit is used to: perform correctness detection on the target input data when input data is received based on the first terminal and the second terminal; If the detection passes, the input data indicating that the detection has passed will be sent to the address programming circuit and the data processing circuit based on the third terminal. If the detection fails, a preset fixed-level signal will be sent to the address programming circuit and the data processing circuit based on the third terminal.

3. The data transmission system according to claim 2, characterized in that, The data detection and switching circuit includes a first data selector and a second data selector. The first end of the first data selector is connected to the first input port, the second end of the first data selector is connected to the second input port, the third end of the first data selector is connected to the first end of the second data selector, the second end of the second data selector is used to connect to a fixed level signal generator, and the third end of the second data selector is connected to the address programming circuit and the data processing circuit respectively. The first data selector is configured to: transmit the first input data to the second data selector when the first input data corresponding to the first input port passes the detection; and transmit the second input data corresponding to the second input port to the second data selector when the first input data fails the detection. The second data selector is used to: when the target input data detection passes, send the input data sent by the first data selector to the address programming circuit and the data processing circuit; when the target input data detection fails, send the fixed level signal to the address programming circuit and the data processing circuit.

4. The data transmission system according to claim 3, characterized in that, The data detection and switching circuit further includes a first data frame detection module, a second data frame detection module, and a NOR gate circuit. The first terminal of the NOR gate circuit is connected to the first data frame detection module, the second terminal of the NOR gate circuit is connected to the second data frame detection module, the third terminal of the NOR gate circuit is connected to the fourth terminal of the second data selector, and the fourth terminal of the first data selector is connected to the first data frame detection module. The first data selector is specifically used to: transmit the first input data to the second data selector when the fourth terminal receives a level signal corresponding to the first input data detection passing from the first data frame detection module; When the fourth terminal receives a level signal corresponding to the failure of the first input data detection sent by the first data frame detection module, the second input data is transmitted to the second data selector. The second data selector is specifically used to: when the fourth terminal receives a level signal corresponding to the target input data detection passed from the NOR gate circuit, send the input data sent by the first data selector to the address programming circuit and the data processing circuit; When the fourth terminal receives a level signal corresponding to the failure of the target input data detection sent by the NOR gate circuit, the fixed level signal is sent to the address programming circuit and the data processing circuit.

5. The data transmission system according to claim 4, characterized in that, The input terminal of the first data frame detection module is connected to the first input port, and the output terminal of the first data frame detection module is connected to the first terminal of the NOR gate circuit and the fourth terminal of the first data selector, respectively. The input terminal of the second data frame detection module is connected to the second input port, and the output terminal of the second data frame detection module is connected to the second terminal of the NOR gate circuit. The first data frame detection module is used to: compare the target level sequence corresponding to the first input data with a preset level sequence; When the target level sequence is consistent with the preset level sequence, it is determined that the first input data detection has passed, and the level signal corresponding to the first input data detection passing is sent to the NOR gate circuit and the first data selector; The second data frame detection module is used to: compare the target level sequence corresponding to the second input data with a preset level sequence; When the target level sequence matches the preset level sequence, it is determined that the second input data detection has passed, and the level signal corresponding to the second input data detection passing is sent to the NOR gate circuit.

6. The data transmission system according to claim 2, characterized in that, The input terminals of the address programming circuit and the data processing circuit are both connected to the third terminal of the data detection and switching circuit, and the output terminals are both connected to the output port of the LED display device. The address programming circuit is used to: store the address-type input data when the input data sent by the data detection and switching circuit is address-type, and send the address-type input data to the first input port of the next LED display device; The data processing circuit is used to: when the input data sent by the data detection and switching circuit is display type, perform display control on the LED display device according to the display type input data, and send the display type input data to the first input port of the next LED display device.

7. The data transmission system according to claim 6, characterized in that, The address programming circuit includes an address memory; The address programming circuit is specifically used to store the address-type input data into the address memory when the input data sent by the data detection and switching circuit is of the address type.

8. The data transmission system according to claim 7, characterized in that, The address programming circuit also includes a switching transistor, a fuse, and a resistor; The first terminal of the switching transistor is connected to the third terminal of the data detection switching circuit, the second terminal of the switching transistor is connected to one end of the fuse, the third terminal of the switching transistor is connected to one end of the resistor, the other end of the fuse is connected to the power supply, the other end of the resistor is grounded, one end of the address memory is connected to one end of the fuse, and the other end is grounded.

9. The data transmission system according to claim 7, characterized in that, The data processing circuit is specifically used to: read the corresponding device data field in the display input data according to the target burning address in the address memory, and perform display control on the LED display device according to the device data field.

10. The data transmission system according to claim 7, characterized in that, The data processing circuit includes a digital signal processing circuit and an LED driving circuit. The first terminal of the digital signal processing circuit is connected to the address memory, the second terminal of the digital signal processing circuit is connected to the third terminal of the data detection and switching circuit, and the third terminal of the digital signal processing circuit is connected to the LED driving circuit.

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