LED display control system and LED display system

Abstract

The present application belongs to the field of display screen control technology, and provides an LED display screen control system and an LED display screen system. The present application sets an isolation module at the first signal output end of the first receiving card and the first signal output end of the second receiving card, and one of the first receiving card and the second receiving card works normally. The normally working receiving card outputs a first level signal according to the standby signal or outputs a second level signal according to the standby wake-up signal, and the non-working receiving card outputs a preset level signal. The isolation module outputs a first isolation signal according to the first level signal and the preset level signal, so that the power module stops supplying power to the display module, or outputs a second isolation signal according to the second level signal and the preset level signal, so that the power module supplies power to the display module, that is, the signal output by the non-working receiving card will not affect the signal output by the normally working receiving card, and ensures that the signal between the first receiving card and the second receiving card does not interfere.

Description

Technical Field

[0001] The present application belongs to the technical field of display screen control, and in particular, relates to an LED display screen control system and an LED display screen system. Background Art

[0002] With the development of the LED display industry, miniaturization and small pitch are an important development trend, and LED screens are more widely used in indoor, exhibition hall and other display occasions. In order to ensure the normal display and sleep of the LED screen, the LED screen control system backs up the signal through the main receiving card and the auxiliary receiving card. When one signal fails, the other signal can ensure the normal display and sleep of the LED screen. However, in the current solution, there is signal interference between the main receiving card and the auxiliary receiving card, which makes the LED screen control system unable to control the normal display and sleep of the LED screen. Utility Model Content

[0003] The embodiments of the present application provide an LED display screen control system and an LED display screen system, which can solve the problem in the current solution that there is signal interference between the main receiving card and the auxiliary receiving card, resulting in the LED display screen control system being unable to control the LED display to display normally and sleep.

[0004] In the first aspect, an embodiment of the present application provides an LED display screen control system, including a main control module, a power module, an isolation module, a first receiving card and a second receiving card, wherein the first power output end of the power module is electrically connected to the power end of the first receiving card and the power end of the second receiving card, respectively, and the second power output end of the power module is used to be electrically connected to the display module, the main control module is electrically connected to the signal input end of the first receiving card and the signal input end of the second receiving card, respectively, the isolation module is electrically connected to the first signal output end of the first receiving card, the first signal output end of the second receiving card and the switch control end of the power module, respectively, and the second signal output end of the first receiving card and the second signal output end of the second receiving card are both used to be electrically connected to the display module;

[0005] The main control module is used to output a standby signal or a standby wake-up signal; the power module is used to output a first power supply voltage to power the first receiving card and the second receiving card; when the first receiving card is normal, the first receiving card is used to generate a first level signal according to the standby signal, or generate a second level signal according to the standby wake-up signal, and the second receiving card outputs a preset level signal; when the first receiving card fails, the first receiving card outputs the preset level signal, and the second receiving card is used to generate a first level signal according to the standby signal, or generate a second level signal according to the standby wake-up signal; the isolation module is used to output a first isolation signal according to the first level signal and the preset level signal, or output a second isolation signal according to the second level signal and the preset level signal; the power module is also used to stop outputting the second power supply voltage to the display module according to the first isolation signal, or output the second power supply voltage to the display module according to the second isolation signal.

[0006] In a possible implementation of the first aspect, the LED display screen control system further includes a signal amplification module, and the signal amplification module is electrically connected to the isolation module and the switch control end of the power supply module respectively;

[0007] The signal amplifying module is used to amplify the first isolated signal or the second isolated signal, and transmit the amplified first isolated signal or the amplified second isolated signal to the power supply module.

[0008] In a possible implementation of the first aspect, the LED display screen control system further includes a pull-up module, which is electrically connected to the signal amplification module, the first power output end of the power module, and the switch control end of the power module respectively;

[0009] The pull-up module is used to transmit the amplified first isolated signal to the power module, or to pull up the amplified second isolated signal to a third level signal and transmit the third level signal to the power module.

[0010] In a possible implementation of the first aspect, the isolation module includes a first resistor and a second resistor, the first end of the first resistor is electrically connected to the first signal output end of the first receiving card, the first end of the second resistor is electrically connected to the first signal output end of the second receiving card, and the second end of the first resistor is electrically connected to the second end of the second resistor and the signal amplification module respectively.

[0011] In a possible implementation of the first aspect, the signal amplification module includes a power amplifier chip and a first capacitor, a transmission direction control pin DIR of the power amplifier chip is electrically connected to a power pin VCC of the power amplifier chip and a first end of the first capacitor, respectively, a second end of the first capacitor and an enable pin OE of the power amplifier chip are both grounded, a data input / output pin A0 of the power amplifier chip is electrically connected to the isolation module, a data input / output pin B0 of the power amplifier chip is electrically connected to the pull-up module, and data input / output pins A1-A7 of the power amplifier chip and a ground pin GND of the power amplifier chip are both grounded.

[0012] In a possible implementation of the first aspect, the pull-up module includes a third resistor and a fourth resistor, the first end of the third resistor is electrically connected to the signal amplification module, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the first power output end of the power module, respectively, and the second end of the fourth resistor is electrically connected to the switch control end of the power module.

[0013] In a possible implementation of the first aspect, the power module includes a switch control unit and a power unit, the switch control unit is electrically connected to an external power supply and an input end of the power unit, respectively, a first power output end of the power unit is electrically connected to a power end of the first receiving card and a power end of the second receiving card, respectively, a second power output end of the power unit is used to be electrically connected to the display module, and a switch control end of the power unit is electrically connected to the pull-up module.

[0014] In a possible implementation of the first aspect, the power supply unit includes a first power supply subunit, a second power supply subunit and a switch subunit, the input end of the first power supply subunit and the input end of the second power supply subunit are both electrically connected to the switch control unit, the output end of the first power supply subunit is respectively electrically connected to the power supply end of the first receiving card and the power supply end of the second receiving card, the output end of the second power supply subunit is electrically connected to the display module through the switch subunit, and the control end of the switch subunit is electrically connected to the pull-up module.

[0015] In a possible implementation manner of the first aspect, the main control module includes a main control unit and a sending card, and the main control unit is electrically connected to a signal input end of the first receiving card and a signal input end of the second receiving card respectively through the sending card.

[0016] In a second aspect, an embodiment of the present application provides an LED display screen system, comprising a display module and an LED display screen control system as described in any one of the first aspects, wherein the LED display screen control system is electrically connected to the display module.

[0017] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0018] The embodiment of the present application provides a control system for an LED display screen, including a main control module, a power module, an isolation module, a first receiving card, and a second receiving card. The first power output terminal of the power module is electrically connected to the power terminal of the first receiving card and the power terminal of the second receiving card respectively, the second power output terminal of the power module is used to be electrically connected to the display module, the main control module is electrically connected to the signal input terminal of the first receiving card and the signal input terminal of the second receiving card respectively, the isolation module is electrically connected to the first signal output terminal of the first receiving card, the first signal output terminal of the second receiving card, and the switch control terminal of the power module respectively, and the second signal output terminal of the first receiving card and the second signal output terminal of the second receiving card are both used to be electrically connected to the display module.

[0019] The main control module is used to output a standby signal or a standby wake-up signal. The power supply module is used to output a first power supply voltage to power the first receiving card and the second receiving card. When the first receiving card is normal, the first receiving card is used to generate a first level signal according to the standby signal, or, to generate a second level signal according to the standby wake-up signal, and the second receiving card outputs a preset level signal. When the first receiving card fails, the first receiving card outputs a preset level signal, and the second receiving card is used to generate a first level signal according to the standby signal, or, to generate a second level signal according to the standby wake-up signal. The isolation module is used to output a first isolation signal according to the first level signal and the preset level signal, or, to output a second isolation signal according to the second level signal and the preset level signal. The power supply module is also used to stop outputting the second power supply voltage to the display module according to the first isolation signal, or, to output the second power supply voltage to the display module according to the second isolation signal.

[0020] The present application sets an isolation module at the first signal output end of the first receiving card and the first signal output end of the second receiving card. If one of the first receiving card and the second receiving card works normally, the normally working receiving card outputs a first level signal according to the standby signal, or outputs a second level signal according to the standby wake-up signal, and the non-working receiving card outputs a preset level signal. The isolation module outputs a first isolation signal according to the first level signal and the preset level signal, so that the power module stops supplying power to the display module, or outputs a second isolation signal according to the second level signal and the preset level signal, so that the power module supplies power to the display module, that is, the signal output by the non-working receiving card will not affect the signal output by the normally working receiving card. Through the isolation effect of the isolation module, the signal finally output by the isolation module is only affected by the signal output by the normally working receiving card, ensuring that the signal between the first receiving card and the second receiving card will not interfere, so that the LED display control system can control the display module to display normally and sleep, and solves the problem that there is signal interference between the main receiving card and the auxiliary receiving card in the current solution, which causes the LED display control system to be unable to control the LED display to display normally and sleep.

[0021] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a principle block diagram of an LED display screen control system provided by an embodiment of the present application;

[0024] Figure 2 This is a principle block diagram of an LED display screen control system provided by another embodiment of the present application;

[0025] Figure 3 This is a principle block diagram of an LED display screen control system provided by another embodiment of the present application;

[0026] Figure 4 This is a principle block diagram of an LED display screen control system provided by another embodiment of the present application;

[0027] Figure 5 This is a principle block diagram of an LED display screen control system provided by another embodiment of the present application.

[0028] Figure 6It is a circuit connection diagram of a signal amplification module in an LED display screen control system provided in an embodiment of the present application;

[0029] Figure 7 This is a control flow chart of an LED display screen provided by an embodiment of the present application;

[0030] Figure 8 This is a LED display screen control flow chart provided by another embodiment of the present application;

[0031] Fig. 9 This is a principle block diagram of an LED display screen system provided in one embodiment of the present application.

[0032] In the figure: 1. LED display system; 10. LED display control system; 11. main control module; 111. main control unit; 112. sending card; 12. power module; 121. switch control unit; 122. power unit; 1221. first power subunit; 1222. second power subunit; 1223. switch subunit; 13. isolation module; 15. signal amplification module; 16. first receiving card; 17. second receiving card; 18. pull-up module; 20. display module; 30. external power supply. DETAILED DESCRIPTION

[0033] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0034] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0035] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0036] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0037] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0038] At present, there is signal interference between the main receiving card and the secondary receiving card in the LED display control system, which causes the LED display control system to be unable to control the normal display and sleep of the LED display. In view of the above problem, the embodiment of the present application provides a LED display control system, such as Figure 1 As shown, the LED display control system 10 includes a main control module 11, a power module 12, an isolation module 13, a first receiving card 16 and a second receiving card 17. The first power output end of the power module 12 is electrically connected to the power end of the first receiving card 16 and the power end of the second receiving card 17 respectively, and the second power output end of the power module 12 is used to be electrically connected to the display module 20. The main control module 11 is electrically connected to the signal input end of the first receiving card 16 and the signal input end of the second receiving card 17 respectively, and the isolation module 13 is electrically connected to the first signal output end of the first receiving card 16, the first signal output end of the second receiving card 17 and the switch control end of the power module 12 respectively, and the second signal output end of the first receiving card 16 and the second signal output end of the second receiving card 17 are both used to be electrically connected to the display module 20.

[0039] Specifically, the main control module 11 is used to output a standby signal or a standby wake-up signal. The power supply module 12 is used to output a first power supply voltage DC1 to power the first receiving card 16 and the second receiving card 17. When the first receiving card 16 is normal, the first receiving card 16 is used to generate a first level signal according to the standby signal, or generate a second level signal according to the standby wake-up signal, and the second receiving card 17 outputs a preset level signal, and the first receiving card 16 is also used to process the display data sent by the main control module 11 and send it to the display module 20. When the first receiving card 16 fails, the first receiving card 16 outputs a preset level signal, and the second receiving card 17 is used to generate a first level signal according to the standby signal, or generate a second level signal according to the standby wake-up signal, and the second receiving card 17 is also used to process the display data sent by the main control module 11 and send it to the display module 20. The isolation module 13 is used to output a first isolation signal according to the first level signal and the preset level signal, or output a second isolation signal according to the second level signal and the preset level signal. The power module 12 is also used to stop outputting the second power supply voltage to the display module 20 according to the first isolation signal, so that the display module 20 stops displaying the received display data (even if the LED display screen enters the standby state), or outputs the second power supply voltage to the display module 20 according to the second isolation signal, and the display module 20 displays the received display data (even if the LED display screen enters the normal display state). Wherein, the first level signal is a low level signal, the second level signal is a high level signal, the preset level signal is a high level signal, the first isolation signal is a low level signal, and the second isolation signal is a high level signal.

[0040] In summary, the present application sets an isolation module 13 at the first signal output end of the first receiving card 16 and the first signal output end of the second receiving card 17. If one of the first receiving card 16 and the second receiving card 17 works normally, the normally working receiving card outputs a first level signal according to the standby signal, or outputs a second level signal according to the standby wake-up signal, and the non-working receiving card outputs a preset level signal. The isolation module 13 will output a first isolation signal according to the first level signal and the preset level signal, so that the power module 12 stops supplying power to the display module 20, or output a second isolation signal according to the second level signal and the preset level signal, so that the power module 12 supplies power to the display module 20, that is, the signal output by the non-working receiving card will not affect the signal output by the normally working receiving card. Through the isolation effect of the isolation module 13, the signal finally output by the isolation module 13 is only affected by the signal output by the normally working receiving card, ensuring that the signal between the first receiving card 16 and the second receiving card 17 will not interfere, so that the LED display control system 10 can control the display module 20 to display normally and sleep, solving the problem that there is signal interference between the main receiving card and the auxiliary receiving card in the current solution, resulting in the LED display control system being unable to control the LED display to display normally and sleep.

[0041] It should be noted that the LED display screen includes a plurality of display modules 20 , and the LED display screen can be put into sleep and awakened by controlling the power supply mode of the display modules 20 .

[0042] like Figure 2 As shown, the LED display screen control system 10 further includes a signal amplifying module 15 , which is electrically connected to the isolation module 13 and the switch control end of the power module 12 , respectively.

[0043] Specifically, in order to prevent the signal from attenuating during the transmission process, the present application sets a signal amplification module 15 behind the isolation module 13, and the signal amplification module 15 is used to amplify the first isolation signal or the second isolation signal, and transmit the amplified first isolation signal or the amplified second isolation signal to the power supply module 12.

[0044] like Figure 3 As shown, the LED display screen control system 10 further includes a pull-up module 18 , which is electrically connected to the signal amplifying module 15 , the first power output terminal of the power module 12 , and the switch control terminal of the power module 12 , respectively.

[0045] Specifically, when controlling the LED display screen to wake up, it is necessary to control the power module 12 to supply power to the display module 20, that is, it is necessary to control the switch inside the power module 12 to be turned on. When the second isolation signal finally output cannot meet the turn-on voltage of the switch inside the power module 12, it is necessary to pull up the second isolation signal to meet the turn-on voltage of the switch inside the power module 12. Therefore, the present application sets a pull-up module 18 behind the signal amplification module 15. At the same time, it is necessary to ensure that when controlling the LED display screen to standby, the setting of the pull-up module 18 will not affect the first isolation signal.

[0046] The pull-up module 18 is used to transmit the amplified first isolated signal to the power module 12, or to pull up the amplified second isolated signal to a third level signal, and transmit the third level signal to the power module 12. The third level signal is a high level signal that satisfies the turn-on voltage of the switch inside the power module 12.

[0047] like Figure 4 As shown, the isolation module 13 includes a first resistor R1 and a second resistor R2, the first end of the first resistor R1 is electrically connected to the first signal output end of the first receiving card 16, the first end of the second resistor R2 is electrically connected to the first signal output end of the second receiving card 17, and the second end of the first resistor R1 is electrically connected to the second end of the second resistor R2 and the signal amplification module 15 respectively.

[0048] Specifically, the present application connects a first resistor R1 in series to the first signal output end of the first receiving card 16, and connects a second resistor R2 in series to the first signal output end of the second receiving card 17. By setting the first resistor R1 and the second resistor R2, it is ensured that the signal ultimately output by the isolation module 13 is only affected by the signal output by the normally operating receiving card, that is, the signal output by the non-operating receiving card will not affect the signal output by the normally operating receiving card, thereby ensuring that the signals between the first receiving card 16 and the second receiving card 17 will not interfere with each other.

[0049] Exemplarily, the resistance values ​​of the first resistor R1 and the second resistor R2 are both 1K.

[0050] like Figure 4 As shown, the pull-up module 18 includes a third resistor R3 and a fourth resistor R4, the first end of the third resistor R3 is electrically connected to the signal amplification module 15, the second end of the third resistor R3 is electrically connected to the first end of the fourth resistor R4 and the first power output end of the power module 12, respectively, and the second end of the fourth resistor R4 is electrically connected to the switch control end of the power module 12.

[0051] Specifically, the function of the pull-up module 18 is mainly to pull up the amplified second isolated signal when the signal amplification module 15 outputs the amplified second isolated signal to obtain a third level signal, so as to ensure that the third level signal can control the power module 12 to output the second power voltage DC2 to the display module 20. When the signal amplification module 15 outputs the amplified first isolated signal, the amplified first isolated signal is directly transmitted to the power module 12 (i.e., the transmission of the low-level signal is not affected) to control the power module 12 to stop outputting the second power voltage DC2 to the display module 20.

[0052] Exemplarily, the resistance of the third resistor R3 is 1000R, and the fourth resistor R4 is a reserved resistor with a resistance of 0.

[0053] like Figure 6 As shown, the signal amplification module 15 includes a power amplifier chip U1 and a first capacitor C1. The transmission direction control pin DIR of the power amplifier chip U1 is electrically connected to the power pin VCC of the power amplifier chip U1 and the first end of the first capacitor C1 respectively. The second end of the first capacitor C1 and the enable pin OE of the power amplifier chip U1 are both grounded. The data input / output pin A0 of the power amplifier chip U1 is electrically connected to the isolation module 13. The data input / output pin B0 of the power amplifier chip U1 is electrically connected to the pull-up module 18. The data input / output pins A1-A7 of the power amplifier chip U1 and the ground pin GND of the power amplifier chip U1 are both grounded. According to Figure 5 It can be seen that the data input / output pin A0 of the power amplifier chip U1 is electrically connected to the second end of the first resistor R1 and the second end of the second resistor R2 respectively. The data input / output pin B0 of the power amplifier chip U1 is electrically connected to the first end of the third resistor R3.

[0054] Specifically, the power amplifier chip U1 is used to amplify the first isolation signal or the second isolation signal, and transmit the amplified first isolation signal or the amplified second isolation signal to the pull-up module 18 .

[0055] Exemplarily, the model of the power amplifier chip U1 is a 245 chip.

[0056] like Figure 4 As shown, the power module 12 includes a switch control unit 121 and a power unit 122. The switch control unit 121 is electrically connected to the external power supply 30 and the input end of the power unit 122 respectively. The first power output end of the power unit 122 is electrically connected to the power end of the first receiving card 16 and the power end of the second receiving card 17 respectively. The second power output end of the power unit 122 is used to be electrically connected to the display module 20. The switch control end of the power unit 122 is electrically connected to the pull-up module 18.

[0057] Specifically, the switch control unit 121 is used to control the access of the external power supply 30 according to the switch control signal, and the power supply unit 122 is used to convert the voltage provided by the external power supply 30 into a first power supply voltage DC1 to power the first receiving card 16 and the second receiving card 17. The power supply unit 122 is also used to convert the voltage provided by the external power supply 30 into a second power supply voltage DC2, and stop outputting the second power supply voltage DC2 to the display module 20 according to the first isolation signal, and the display module 20 stops displaying the received display data, or outputs the second power supply voltage DC2 to the display module 20 according to the third level signal, and the display module 20 displays the received display data.

[0058] like Figure 5 As shown, the power supply unit 122 includes a first power supply subunit 1221, a second power supply subunit 1222 and a switch subunit 1223. The input end of the first power supply subunit 1221 and the input end of the second power supply subunit 1222 are both electrically connected to the switch control unit 121, the output end of the first power supply subunit 1221 is electrically connected to the power supply end of the first receiving card 16 and the power supply end of the second receiving card 17 respectively, the output end of the second power supply subunit 1222 is electrically connected to the display module 20 through the switch subunit 1223, and the control end of the switch subunit 1223 is electrically connected to the pull-up module 18.

[0059] Specifically, the first power supply subunit 1221 is used to convert the voltage provided by the external power supply 30 into the first power supply voltage DC1, and supply power to the first receiving card 16 and the second receiving card 17. The second power supply subunit 1222 is used to convert the voltage provided by the external power supply 30 into the second power supply voltage DC2. The switch subunit 1223 is used to disconnect according to the first isolation signal, so that the second power supply subunit 1222 stops outputting the second power supply voltage DC2 to the display module 20, and the display module 20 stops displaying the received display data. The switch subunit 1223 is used to conduct according to the third level signal, so that the second power supply subunit 1222 outputs the second power supply voltage DC2 to the display module 20, and the display module 20 displays the received display data.

[0060] like Figure 4 As shown, the main control module 11 includes a main control unit 111 and a sending card 112 . The main control unit 111 is electrically connected to a signal input terminal of the first receiving card 16 and a signal input terminal of the second receiving card 17 through the sending card 112 .

[0061] Specifically, the main control unit 111 is used to set trigger conditions (the trigger conditions include whether the display brightness exceeds the brightness threshold, whether the image frequency exceeds the image frequency threshold, and whether there is a signal source), and send the trigger conditions to the sending card 112. The main control unit 111 is also used to send video data to the sending card 112. The sending card 112 is used to monitor the video data. When there is no signal source or there is a signal source but the display brightness in the video data does not exceed the brightness threshold and the image frequency does not exceed the image frequency threshold, a standby signal is output. When there is a signal source and the display brightness in the video data exceeds the brightness threshold and the image frequency exceeds the image frequency threshold, a standby wake-up signal is output.

[0062] The present application embodiment also provides a LED display screen control process, such as Figure 7 As shown, the LED display control process includes:

[0063] S701, the main control module outputs a standby signal. When the first receiving card is normal, the first receiving card receives the standby signal, generates a first level signal according to the standby signal, and the second receiving card outputs a preset level signal. The first receiving card is also used to process the display data sent by the main control module and send it to the display module.

[0064] S702: The isolation module outputs a first isolation signal according to the first level signal and the preset level signal.

[0065] S703: The power module stops outputting the second power voltage to the display module according to the first isolation signal, and the display module stops displaying the received display data.

[0066] The present application sets an isolation module at the first signal output end of the first receiving card and the first signal output end of the second receiving card. When the first receiving card is normal, through the isolation effect of the isolation module, the signal finally output by the isolation module is only affected by the signal output by the first receiving card, that is, the signal output by the second receiving card will not affect the signal output by the first receiving card, thereby ensuring that the signals between the first receiving card and the second receiving card will not interfere with each other.

[0067] The present application embodiment also provides a LED display screen control process, such as Figure 8 As shown, the LED display control process includes:

[0068] S801, the main control module outputs a standby wake-up signal. When the first receiving card is normal, the first receiving card receives the standby wake-up signal, outputs a second level signal according to the standby wake-up signal, and the second receiving card outputs a preset level signal. The first receiving card is also used to process the display data sent by the main control module and send it to the display module.

[0069] S802: The isolation module outputs a second isolation signal according to the second level signal and the preset level signal.

[0070] S803: The power module outputs a second power voltage to the display module according to the second isolation signal, and the display module displays the received display data.

[0071] The present application sets an isolation module at the first signal output end of the first receiving card and the first signal output end of the second receiving card. When the first receiving card is normal, through the isolation effect of the isolation module, the signal finally output by the isolation module is only affected by the signal output by the first receiving card, that is, the signal output by the second receiving card will not affect the signal output by the first receiving card, thereby ensuring that the signals between the first receiving card and the second receiving card will not interfere with each other.

[0072] The present application also provides an LED display system, such as Fig. 9 As shown, the LED display screen system 1 includes a display module 20 and the above-mentioned LED display screen control system 10, and the LED display screen control system 10 is electrically connected to the display module 20. Since the LED display screen system 1 provided in the embodiment of the present application adopts all the technical solutions of all the above-mentioned embodiments, the LED display screen system 1 provided in the embodiment of the present application can normally control the display module 20 to display normally and sleep, and will not be described one by one here.

[0073] Exemplarily, the LED display screen system 1 includes an advertising screen, a conference screen, a home theater, and the like.

[0074] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A LED display screen control system, characterized in that: It includes a main control module, a power module, an isolation module, a first receiving card and a second receiving card, wherein the first power output end of the power module is electrically connected to the power end of the first receiving card and the power end of the second receiving card respectively, and the second power output end of the power module is used to be electrically connected to the display module, the main control module is electrically connected to the signal input end of the first receiving card and the signal input end of the second receiving card respectively, the isolation module is electrically connected to the first signal output end of the first receiving card, the first signal output end of the second receiving card and the switch control end of the power module respectively, and the second signal output end of the first receiving card and the second signal output end of the second receiving card are both used to be electrically connected to the display module; The main control module is used to output a standby signal or a standby wake-up signal; the power supply module is used to output a first power supply voltage to power the first receiving card and the second receiving card; when the first receiving card is normal, the first receiving card is used to generate a first level signal according to the standby signal, or generate a second level signal according to the standby wake-up signal, and the second receiving card outputs a preset level signal; When the first receiving card fails, the first receiving card outputs the preset level signal, and the second receiving card is used to generate a first level signal according to the standby signal, or generate a second level signal according to the standby wake-up signal; The isolation module is used to output a first isolation signal according to the first level signal and the preset level signal, or to output a second isolation signal according to the second level signal and the preset level signal; The power supply module is further configured to stop outputting the second power supply voltage to the display module according to the first isolation signal, or to output the second power supply voltage to the display module according to the second isolation signal.

2. The LED display screen control system according to claim 1, characterized in that: The LED display screen control system further includes a signal amplification module, and the signal amplification module is electrically connected to the isolation module and the switch control end of the power supply module respectively; The signal amplifying module is used to amplify the first isolated signal or the second isolated signal, and transmit the amplified first isolated signal or the amplified second isolated signal to the power supply module.

3. The LED display screen control system according to claim 2 is characterized in that: The LED display screen control system further comprises a pull-up module, which is electrically connected to the signal amplification module, the first power output terminal of the power module and the switch control terminal of the power module respectively; The pull-up module is used to transmit the amplified first isolated signal to the power module, or to pull up the amplified second isolated signal to a third level signal and transmit the third level signal to the power module.

4. The LED display screen control system according to claim 3, characterized in that: The isolation module includes a first resistor and a second resistor, wherein a first end of the first resistor is electrically connected to a first signal output end of the first receiving card, a first end of the second resistor is electrically connected to a first signal output end of the second receiving card, and a second end of the first resistor is electrically connected to a second end of the second resistor and the signal amplification module, respectively.

5. The LED display screen control system according to claim 3, characterized in that: The signal amplification module includes a power amplifier chip and a first capacitor, a transmission direction control pin DIR of the power amplifier chip is electrically connected to a power pin VCC of the power amplifier chip and a first end of the first capacitor respectively, a second end of the first capacitor and an enable pin OE of the power amplifier chip are both grounded, a data input / output pin A0 of the power amplifier chip is electrically connected to the isolation module, a data input / output pin B0 of the power amplifier chip is electrically connected to the pull-up module, and data input / output pins A1-A7 of the power amplifier chip and a ground pin GND of the power amplifier chip are both grounded.

6. The LED display screen control system according to claim 3, characterized in that: The pull-up module includes a third resistor and a fourth resistor, the first end of the third resistor is electrically connected to the signal amplification module, the second end of the third resistor is electrically connected to the first end of the fourth resistor and the first power output end of the power module respectively, and the second end of the fourth resistor is electrically connected to the switch control end of the power module.

7. The LED display screen control system according to claim 3, characterized in that: The power module includes a switch control unit and a power unit, the switch control unit is electrically connected to an external power supply and an input end of the power unit, respectively, the first power output end of the power unit is electrically connected to the power end of the first receiving card and the power end of the second receiving card, respectively, the second power output end of the power unit is used to be electrically connected to the display module, and the switch control end of the power unit is electrically connected to the pull-up module.

8. The LED display screen control system according to claim 7, characterized in that: The power supply unit includes a first power supply subunit, a second power supply subunit and a switch subunit, the input end of the first power supply subunit and the input end of the second power supply subunit are both electrically connected to the switch control unit, the output end of the first power supply subunit is electrically connected to the power supply end of the first receiving card and the power supply end of the second receiving card respectively, the output end of the second power supply subunit is electrically connected to the display module through the switch subunit, and the control end of the switch subunit is electrically connected to the pull-up module.

9. The LED display screen control system according to claim 1, characterized in that: The main control module includes a main control unit and a sending card. The main control unit is electrically connected to a signal input terminal of the first receiving card and a signal input terminal of the second receiving card through the sending card.

10. An LED display screen system, characterized in that: It comprises a display module and the LED display screen control system according to any one of claims 1 to 9, wherein the LED display screen control system is electrically connected to the display module.

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