LED control module and LED display system

Abstract

The utility model provides a kind of LED control module and LED display system, wherein, LED control module is connected with the LED display module of partition setting one-to-one, LED control module includes parallelly connected signal processing module and parallel module, and with the indicating module of parallel module connection, signal processing module series transmission display signal, when one of signal processing module is abnormal, parallel module replaces signal processing module transmission display signal to the signal processing module of next LED control module, reliable transmission of display signal is realized, while outputting indicating signal control indicating module output corresponding indicating information, accurately positioning abnormal LED control module, reduce maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of display screen technology, and in particular relates to an LED control module and an LED display system. Background Technology

[0002] In LED display technology, LED displays are typically divided into multiple display areas. The display signals corresponding to the content of these areas are transmitted serially. During data transmission, if an anomaly occurs in one of the display areas, causing a data transmission interruption, the current display area and subsequent cascaded display areas will fail to display correctly, resulting in poor data transmission stability. Furthermore, when one or more display areas malfunction, it is impossible to pinpoint the location of the malfunctioning area, requiring manual troubleshooting for maintenance, which increases maintenance costs. Utility Model Content

[0003] The purpose of this utility model is to provide an LED control module that aims to solve the problems of poor data transmission stability and high maintenance costs under abnormal conditions in traditional LED displays.

[0004] A first aspect of this utility model provides an LED control module, wherein each LED control module is connected to a display module of an LED display screen, and the LED display screen includes multiple display modules;

[0005] The LED control module includes:

[0006] The signal processing module is connected to the signal processing module corresponding to the current display module and the next display module respectively. The signal processing module is used to transmit the received display signal to the display module for display and to transmit the display signal to the signal processing module of the next LED control module.

[0007] A parallel module is connected in parallel with the signal processing module. The signal terminal of the parallel module is also connected to the signal terminal of the signal processing module. The parallel module is used to detect the working status of the signal processing module, and when the signal processing module is abnormal, it transmits the display signal to the signal processing module of the next LED control module, and outputs an indication signal.

[0008] An indicator module, connected to the parallel module, is used to output corresponding indicator information according to the indicator signal.

[0009] Optionally, the LED control module further includes:

[0010] A power supply module is connected to the signal processing module, and the power supply module is used to provide a first operating voltage to the signal processing module.

[0011] Optionally, the signal processing module includes a receiver card, the input terminal of which is connected to the input terminal of the parallel module, the output terminal of which is connected to the output terminal of the parallel module, and the signal terminal of which is connected to the signal terminal of the parallel module. The signal terminal of the receiver card outputs a first level signal when the receiver card is working normally and outputs a second level signal when the receiver card is malfunctioning.

[0012] Optionally, the parallel module includes:

[0013] The signal transmission circuit is connected in parallel with the receiving card, and is turned off by a first enable signal or turned on by a second enable signal to transmit the display signal to the signal processing module of the next display module, wherein the second enable signal is the indication signal;

[0014] The logic processing circuit is connected to the signal terminal of the receiving card, the power terminal of the power module, the signal transmission circuit, and the indicator module, respectively. The logic processing circuit is used to perform logical operations on the level signal of the signal terminal of the receiving card and the voltage of the power terminal of the power module, and outputs the first enable signal when the first level signal and the first working voltage are received simultaneously, otherwise outputs the second enable signal.

[0015] Optionally, the logic processing circuit includes an AND gate;

[0016] The first input terminal of the AND gate is connected to the signal terminal of the receiving card, the second input terminal of the AND gate is connected to the power terminal of the power module, and the output terminal of the AND gate is connected to the signal transmission circuit and the indicator module respectively.

[0017] Optionally, the parallel module further includes:

[0018] A step-down circuit is provided, wherein the input terminal of the step-down circuit is connected to the input terminal of the signal processing module, and the output terminal of the step-down circuit is connected to the power supply terminal of the signal transmission circuit, the power supply terminal of the logic processing circuit, and the power supply terminal of the indicator module, respectively. The step-down circuit is used to step down the voltage of the display signal and convert it into a second operating voltage, and output it to the signal transmission circuit, the logic processing circuit, and the indicator module.

[0019] Optionally, the indicator module is disposed on the non-display surface of the display module.

[0020] Optionally, the indicator module includes at least one of an indicator light, a buzzer, and a vibrator.

[0021] A second aspect of this utility model provides an LED display system, comprising:

[0022] LED display screen, including multiple display modules;

[0023] Multiple LED control modules are connected in series, and each LED control module is connected to the display module. The LED control modules are as described above.

[0024] Optionally, the LED display system further includes:

[0025] A sending card is connected to the first LED control module in a plurality of LED control modules connected in series; the sending card is used to send the received display signal to the first LED control module so that the display signal is transmitted from the first LED control module to the last LED control module.

[0026] The beneficial effects of this utility model embodiment compared with the prior art are as follows: the above-mentioned LED control module is connected one by one with the partitioned LED display modules. The LED control module includes a signal processing module and a parallel module connected in parallel, as well as an indicator module connected to the parallel module. The signal processing module transmits the display signal in series. When one of the signal processing modules malfunctions, the parallel module replaces the signal processing module to transmit the display signal to the signal processing module of the next LED control module, so as to realize the reliable transmission of the display signal. At the same time, the indicator signal is output to control the indicator module to output the corresponding indicator information, accurately locate the malfunctioning LED control module, and reduce maintenance costs. Attached Figure Description

[0027] Figure 1 A first structural schematic diagram of the LED control module and LED display system provided in this embodiment of the utility model;

[0028] Figure 2 This is a second structural schematic diagram of the LED control module and LED display system provided in an embodiment of the present utility model;

[0029] Figure 3 A third structural schematic diagram of the LED control module and LED display system provided in this embodiment of the utility model;

[0030] Figure 4 A circuit diagram of the logic processing circuit provided in an embodiment of this utility model;

[0031] Figure 5 A fourth structural schematic diagram of the LED control module and LED display system provided in this embodiment of the utility model;

[0032] Figure 6This is a fifth structural schematic diagram of the LED control module and LED display system provided in the embodiments of this utility model.

[0033] The figures in the diagram are labeled as follows:

[0034] 100. LED cabinet; 200. Transmitting card; 110. Display module; 120. LED control module; 121. Signal processing module; 122. Parallel module; 123. Indicator module; 124. Power supply module; 1211. Receiver card; 1221. Logic processing circuit; 1222. Signal transmission circuit; 1223. Step-down circuit;

[0035] U1, AND gate; S1, signal level of the receiving card's signal terminal; S2, enable signal output by the AND gate; V1, first operating voltage. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0037] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] The first aspect of this utility model embodiment provides an LED control module 120, such as... Figure 1 As shown, each LED control module 120 is connected to a display module 110 of the LED display screen. The LED display screen includes multiple display modules 110. The display modules 110 may include adapter boards, lamp boards, etc. The LED control module 120 and the display modules 110 can be set in an LED cabinet 100. The LED cabinet 100 is spliced ​​together to form an LED display screen.

[0039] LED control modules 120 are connected in series. The first LED control module 120 receives the display signal and transmits the display signal to the next LED control module 120, thus realizing the transmission of the display signal from one LED cabinet 100 to the next LED cabinet 100.

[0040] In order to improve the reliability of data transmission, in this embodiment, as follows: Figure 1 As shown, the LED control module 120 includes:

[0041] The signal processing module 121 is connected to the signal processing module 121 corresponding to the current display module 110 and the next display module 110 respectively. The signal processing module 121 is used to transmit the received display signal to the display module 110 for display and to transmit the display signal to the next LED control module 120.

[0042] Parallel module 122 is connected in parallel with signal processing module 121. The signal terminal of parallel module 122 is also connected to the signal terminal of signal processing module 121. Parallel module 122 is used to detect the working status of signal processing module 121, and when signal processing module 121 is abnormal, it transmits the display signal to the signal processing module 121 of the next LED control module 120, and outputs an indication signal.

[0043] Indicator module 123, connected to parallel module 122, is used to output corresponding indication information according to indication signal.

[0044] In this embodiment, multiple signal processing modules 121 are connected in series. Each signal processing module 121 is connected to the display module 110 of the LED cabinet 100 it is currently in. The signal processing module 121 receives the display signal input from the front end. The display signal can be a video signal or an image signal, etc. On the one hand, the signal processing module 121 converts the display signal into a corresponding LED driving signal and outputs it to the display module 110, thereby controlling the display module 110 of the LED cabinet 100 to display the corresponding video information or image information. On the other hand, the signal processing module 121 transmits the display signal to the signal processing module 121 of the next-level LED control module 120, thereby realizing the cascading transmission of the display signal until it is transmitted to the last-level LED control module 120.

[0045] The signal terminals of the parallel module 122 are connected to the signal terminals of the signal processing module 121. The signal terminals of the signal processing module 121 can be I / O ports, GPIO ports, etc. of the corresponding processor or controller. The signal terminals of the parallel module 122 can be control terminals of the corresponding switches, enable terminals of the corresponding processor, etc. When the signal processing module 121 is working normally, the signal terminals of the signal processing module 121 can be in a first level state, such as a high level. When the parallel module 122 detects that the signal terminals of the signal processing module 121 are in the first level state, the parallel module 122 is controlled to turn off, does not perform data transmission, and does not output indicator signals. The indicator module 123 remains in a non-display state and does not output indicator information. The indicator information can be vibration information, indicator light information, voice information, etc.

[0046] When the signal processing module 121 malfunctions, it cannot output LED driving signals to the corresponding connected display module 110, nor can it transmit display signals to the next-level signal processing module 121. At this time, the signal terminal of the signal processing module 121 may be in a second level state, such as a low level. When the parallel module 122 detects that the signal terminal of the current signal processing module 121 is low, the parallel module 122 is triggered to connect, replacing the signal processing module 121 to transmit the display signal to the next-level signal processing module 121. At the same time, the parallel module 122 is triggered to output an indicator signal. After receiving the indicator signal, the indicator module 123 switches to the indicator mode and outputs the corresponding indicator information.

[0047] By setting up parallel modules 122 and indicator modules 123, when the signal processing module 121 malfunctions, on the one hand, the display signal can be cascaded to improve the reliability of signal transmission; on the other hand, the location of the malfunctioning LED control module 120 and the corresponding LED cabinet 100 can be indicated. During maintenance, the staff can intuitively determine the location of the malfunctioning LED control module 120 and the corresponding LED cabinet 100, reducing maintenance costs.

[0048] The signal processing module 121 can employ a corresponding processor, controller, etc., as shown in an optional embodiment, such as... Figure 3 As shown, the signal processing module 121 includes a receiver card 1211. The input terminal of the receiver card 1211 is connected to the input terminal of the parallel module 122, the output terminal of the receiver card 1211 is connected to the output terminal of the parallel module 122, and the signal terminal of the receiver card 1211 is connected to the signal terminal of the parallel module 122. The signal terminal of the receiver card 1211 outputs a first-level signal when the receiver card 1211 is working normally, and outputs a second-level signal when the receiver card 1211 is malfunctioning.

[0049] When parallel module 122 receives the first level signal, it is controlled to turn off, stops data transmission, and does not output an indication signal. Indication module 123 remains in a non-display state with no indication information output. When parallel module 122 receives the second level signal, it detects that the signal terminal of the current signal processing module 121 is at a low level. Parallel module 122 is then triggered to connect, replacing signal processing module 121 in transmitting the display signal to the next-level signal processing module 121. At the same time, parallel module 122 is triggered to output an indication signal. After receiving the indication signal, indication module 123 switches to indication mode and outputs corresponding indication information.

[0050] The receiver card 1211 can be a corresponding processor, controller, etc. In an optional embodiment, the receiver card 1211 is an MCU, and the signal terminal of the receiver card 1211 can be the I / O port or GPIO port of the MCU. In an optional embodiment, the signal terminal of the receiver card 1211 is the GPIO port of the MCU. When the receiver card 1211 is working normally, the GPIO port is at a high level, that is, it outputs a high-level signal to the parallel module 122. When the receiver card 1211 is abnormal, the GPIO port is at a low level, that is, it outputs a low-level signal to the parallel module 122.

[0051] The indicator module 123 can select a corresponding indicator structure according to the indicator information. In an optional embodiment, the indicator module 123 includes at least one of an indicator light, a buzzer, and a vibrator.

[0052] Meanwhile, in order to improve the recognizability of the indication, in one optional embodiment, the indication module 123 is disposed on the non-display surface of the display module 110, and in another optional embodiment, the indication module 123 is disposed on the back of the display module 110, so that the staff can determine the location of the abnormal LED control module 120 according to the indication on the back of the display module 110.

[0053] In order to ensure the normal operation of the signal processing module 121, in an optional embodiment, such as... Figure 2 As shown, the LED control module 120 also includes:

[0054] The power supply module 124 is connected to the signal processing module 121 and is used to provide a first operating voltage to the signal processing module 121.

[0055] The power supply module 124 provides operating power to the signal processing module 121. The parallel module 122 can be powered by the power supply module 124 or directly obtain operating power from the display signal input at the input terminal. The specific power source is not limited.

[0056] Each LED cabinet 100 is provided with a power module 124. The power module 124 can be a battery, a power conversion circuit, etc. In an optional embodiment, the power module 124 is a switching power supply circuit. The power input terminals of multiple switching power supply circuits are connected to the AC power supply terminal. The switching power supply circuit converts the received AC voltage into a first working voltage of DC voltage and provides it to the signal processing module 121.

[0057] The parallel module 122 can adopt corresponding switching circuits, controllers, and other structures. The receiver card 1211 cannot function properly when it malfunctions or its power supply fails. To achieve synchronous detection of the receiver card 1211's operating status and power supply status, such as... Figure 3 As shown, in an optional embodiment, the parallel module 122 includes:

[0058] The signal transmission circuit 1222 is connected in parallel with the receiving card 1211. It is triggered to turn off by a first enable signal or to turn on by a second enable signal and transmits the display signal to the signal processing module 121 of the next display module 110. The second enable signal is an indication signal.

[0059] The logic processing circuit 1221 is connected to the signal terminal of the receiving card 1211, the power terminal of the power module 124, the signal transmission circuit 1222, and the indicator module 123, respectively. The logic processing circuit 1221 is used to perform logical operations on the level signal of the signal terminal of the receiving card 1211 and the voltage of the power terminal of the power module 124, and outputs a first enable signal when it receives a first level signal and a first working voltage at the same time; otherwise, it outputs a second enable signal.

[0060] In this embodiment, when the receiving card 1211 is in a normal state and receives the first working voltage normally, the receiving card 1211 works normally, the signal terminal of the receiving card 1211 is in a first level state, and when the power module 124 outputs the first working voltage normally, the logic processing circuit 1221 outputs the first enable signal to the signal transmission circuit 1222 and the indicator module 123 after logic operation. The first enable signal controls the signal transmission circuit 1222 to stop the signal transmission operation, and at the same time, the first enable signal controls the indicator module 123 to stop the indicator operation.

[0061] When the receiving card 1211 malfunctions or the power module 124 outputs an abnormal signal, the signal terminal of the receiving card 1211 is in a second level state, and / or, when the power module 124 does not output the first working voltage, the logic processing circuit 1221 outputs a second enable signal after logical operation. The second enable signal enables the control signal transmission circuit 1222 to be turned on and transmits the display signal to the next level signal processing module 121. At the same time, the second enable signal acts as an indication signal to control the indication module 123 to output corresponding indication information.

[0062] The logic processing circuit 1221 can employ corresponding logic gates, switches, etc. In an optional embodiment, such as... Figure 4 As shown, the logic processing circuit 1221 includes an AND gate U1;

[0063] The first input terminal of AND gate U1 is connected to the signal terminal of receiver card 1211, the second input terminal of AND gate U1 is connected to the power terminal of power module 124, and the output terminal of AND gate U1 is connected to signal transmission circuit 1222 and indicator module 123 respectively.

[0064] In this embodiment, S1 represents the level signal of the signal terminal of the receiving card, S2 represents the enable signal output by the AND gate, and V1 represents the first operating voltage. The first level signal is high level, and the second level signal is low level. At the same time, when the power module 124 outputs the first operating voltage, it is at a high level. When it does not output the first operating voltage, the power terminal of the power module 124 is at a low level. When the receiving card 1211 is working normally, and when the power module 124 outputs the first operating voltage normally, the first enable signal output by the AND gate U1 controls the signal transmission circuit 1222 to be cut off and the control indicator module 123 to stop indicating.

[0065] When the receiving card 1211 malfunctions or the power module 124 outputs an abnormal signal, the signal terminal of the receiving card 1211 is in a second level state, and / or, when the power module 124 does not output the first working voltage, one of the input terminals of the AND gate U1 is input with a low level, and the AND gate U1 outputs a low-level second enable signal. The second enable signal enables the control signal transmission circuit 1222 to conduct and transmits the display signal to the next level signal processing module 121. At the same time, the second enable signal acts as an indication signal to control the indication module 123 to output corresponding indication information.

[0066] The signal transmission circuit 1222 can be a switching circuit, a controller, etc. In an optional embodiment, the signal transmission circuit 1222 is a switching circuit composed of a PNP transistor or a PMOS transistor. The PNP transistor or PMOS transistor is triggered to turn off when it receives a high-level first enable signal, and triggered to turn on when it receives a low-level second enable signal.

[0067] In another optional embodiment, the signal transmission circuit 1222 is an MCU, the enable port of the MCU or a GPIO port. The MCU stops working when it receives a high-level first enable signal, and starts working when it receives a low-level second enable signal, and replaces the receiver card 1211 to transmit the display signal to the next level receiver card 1211.

[0068] In order to power the logic processing circuit 1221, the signal transmission circuit 1222, and the indicator module 123, in an optional embodiment, such as... Figure 5 As shown, the parallel module 122 also includes:

[0069] The step-down circuit 1223 has its input terminal connected to the input terminal of the signal processing module 121, and its output terminal connected to the power supply terminals of the signal transmission circuit 1222, the logic processing circuit 1221, and the indicator module 123, respectively. The step-down circuit 1223 is used to step down the voltage of the display signal to a second operating voltage and output it to the signal transmission circuit 1222, the logic processing circuit 1221, and the indicator module 123.

[0070] In this embodiment, the display signal is a voltage of a certain magnitude, such as 48V. The step-down circuit 1223 obtains power from the display signal and steps it down to a second operating voltage, such as outputting a second operating voltage of 5V.

[0071] The second working voltage is output to the signal transmission circuit 1222 and the logic processing circuit 1221 as the working voltage. The second working voltage is also output to the first terminal of the indicator module 123 as the driving voltage. The second terminal of the indicator module 123 is connected to the output terminal of the logic processing circuit 1221. When a low-level indicator signal is received, the low level and the second working voltage form a voltage difference and drive the indicator module 123 to output indicator information.

[0072] The step-down circuit 1223 can adopt corresponding DC / DC converters, voltage regulators, and other circuit structures.

[0073] The beneficial effects of this utility model embodiment compared with the prior art are as follows: The LED control module 120 is connected one-to-one with the partitioned LED display modules 110. The LED control module 120 includes a signal processing module 121 and a parallel module 122 connected in parallel, and an indicator module 123 connected to the parallel module 122. The signal processing module 121 transmits the display signal in series. When one of the signal processing modules 121 is abnormal, the parallel module 122 replaces the signal processing module 121 to transmit the display signal to the signal processing module 121 of the next LED control module 120, so as to realize the reliable transmission of the display signal. At the same time, the indicator signal is output to control the indicator module 123 to output the corresponding indicator information, accurately locate the abnormal LED control module 120, and reduce maintenance costs.

[0074] like Figure 1 As shown, a second aspect of this utility model provides an LED display system, comprising:

[0075] LED display screen, including multiple display modules 110;

[0076] Multiple LED control modules 120 are connected in series, and each LED control module 120 is connected to a display module 110. The LED control module 120 is the same as described above. The specific structure of the LED control module 120 is as described in the above embodiments. Since this LED display system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0077] The display module 110 may include an adapter board, a lamp board, etc. The LED control module 120 and the display module 110 may be set in an LED cabinet 100, and the LED cabinet 100 is spliced ​​together to form an LED display screen.

[0078] LED control modules 120 are connected in series. The first LED control module 120 receives the display signal and transmits the display signal to the next LED control module 120, thus realizing the transmission of the display signal from one LED cabinet 100 to the next LED cabinet 100.

[0079] To achieve signal transmission, in one optional embodiment, such as Figure 6 As shown, the LED display system also includes:

[0080] The transmitting card 200 is connected to the first LED control module 120 among a plurality of LED control modules 120 connected in series. The transmitting card 200 is used to send the received display signal to the first LED control module 120 so that the display signal is transmitted from the first LED control module 120 to the last LED control module 120.

[0081] In this embodiment, the sending card 200 can be connected to the host computer and receive the display signal transmitted by the host computer. The sending card 200 parses and processes the data signal and transmits the processed display signal to the LED control module 120 located in the first level. The display signal is transmitted from the first LED control module 120 to the last LED control module 120, realizing the cascading transmission of the display signal.

[0082] The host computer can also send ID configuration information through the sending card 200 and configure the ID of each LED control module 120. Each LED control module 120 has an ID information, which is written into the receiving card 1211. The host computer can also periodically send ID reading commands through the sending card 200 to read the ID information in each receiving card 1211, thereby realizing the online determination of the location of the faulty receiving card 1211 and the LED box 100.

[0083] When replacing the faulty receiver card 1211 and / or LED cabinet 100, the host computer can reassign ID information to the updated receiver card 1211 through the sending card 200 and write the new ID information into the receiver card 1211.

[0084] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. An LED control module, characterized in that, Each of the LED control modules is connected to a display module of the LED display screen, and the LED display screen includes multiple display modules; The LED control module includes: The signal processing module is connected to the signal processing module corresponding to the current display module and the next display module respectively. The signal processing module is used to transmit the received display signal to the display module for display and to transmit the display signal to the signal processing module of the next LED control module. A parallel module is connected in parallel with the signal processing module. The signal terminal of the parallel module is also connected to the signal terminal of the signal processing module. The parallel module is used to detect the working status of the signal processing module, and when the signal processing module is abnormal, it transmits the display signal to the signal processing module of the next LED control module, and outputs an indication signal. An indicator module, connected to the parallel module, is used to output corresponding indicator information according to the indicator signal.

2. The LED control module as described in claim 1, characterized in that, The LED control module also includes: A power supply module is connected to the signal processing module, and the power supply module is used to provide a first operating voltage to the signal processing module.

3. The LED control module as described in claim 2, characterized in that, The signal processing module includes a receiver card, the input terminal of which is connected to the input terminal of the parallel module, the output terminal of which is connected to the output terminal of the parallel module, and the signal terminal of which is connected to the signal terminal of the parallel module. The signal terminal of the receiver card outputs a first level signal when the receiver card is working normally and outputs a second level signal when the receiver card is malfunctioning.

4. The LED control module as described in claim 3, characterized in that, The parallel module includes: The signal transmission circuit is connected in parallel with the receiving card, and is turned off by a first enable signal or turned on by a second enable signal to transmit the display signal to the signal processing module of the next display module, wherein the second enable signal is the indication signal; The logic processing circuit is connected to the signal terminal of the receiving card, the power terminal of the power module, the signal transmission circuit, and the indicator module, respectively. The logic processing circuit is used to perform logical operations on the level signal of the signal terminal of the receiving card and the voltage of the power terminal of the power module, and outputs the first enable signal when the first level signal and the first working voltage are received simultaneously, otherwise outputs the second enable signal.

5. The LED control module as described in claim 4, characterized in that, The logic processing circuit includes an AND gate; The first input terminal of the AND gate is connected to the signal terminal of the receiving card, the second input terminal of the AND gate is connected to the power terminal of the power module, and the output terminal of the AND gate is connected to the signal transmission circuit and the indicator module respectively.

6. The LED control module as described in claim 4, characterized in that, The parallel module also includes: A step-down circuit is provided, wherein the input terminal of the step-down circuit is connected to the input terminal of the signal processing module, and the output terminal of the step-down circuit is connected to the power supply terminal of the signal transmission circuit, the power supply terminal of the logic processing circuit, and the power supply terminal of the indicator module, respectively. The step-down circuit is used to step down the voltage of the display signal and convert it into a second operating voltage, and output it to the signal transmission circuit, the logic processing circuit, and the indicator module.

7. The LED control module as described in any one of claims 1 to 6, characterized in that, The indicator module is located on the non-display surface of the display module.

8. The LED control module as described in claim 7, characterized in that, The indicator module includes at least one of an indicator light, a buzzer, and a vibrator.

9. An LED display system, characterized in that, include: LED display screen, including multiple display modules; Multiple LED control modules are connected in series, and each LED control module is connected to the display module. The LED control module is the LED control module according to any one of claims 1-8.

10. The LED display system as described in claim 9, characterized in that, The LED display system also includes: A sending card is connected to the first LED control module in a plurality of LED control modules connected in series; the sending card is used to send the received display signal to the first LED control module so that the display signal is transmitted from the first LED control module to the last LED control module.

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