LED display module, LED display system and electronic equipment

Abstract

The invention provides an LED display module, an LED display system and electronic equipment, the LED display module comprises an LED display control chip and a plurality of LED lamps, the LED display control chip comprises a signal processing circuit, a voltage stabilizing circuit and a display control circuit, and the signal processing circuit comprises a processing unit, a power management unit and a display data processing unit. When the power management unit judges that the display type flag bit of the LED display module corresponds to the all-black display type, namely the display data is all-black data, a sleep control signal is generated to control the display control circuit to sleep, and meanwhile voltage is stopped being supplied to the display data processing unit by controlling the voltage stabilizing voltage. Therefore, when the LED display module is in an all-black display state, a circuit related to display is dormant, so that the energy consumption of an LED display control chip is reduced, and the low-power-consumption design is realized.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to an LED display module, an LED display system and an electronic device. Background Art

[0002] In LED display systems, high power consumption means more energy consumption, which causes the display system to overheat and affects the life and performance of the display system. Traditional LED display control chips achieve low power design by optimizing the chip circuit structure and simplifying the chip peripheral circuits, thereby improving the overall energy efficiency of the LED display system. Although optimizing the chip circuit structure and simplifying the chip peripheral circuits have reduced the power consumption of the display chip to a certain extent, the effect is limited. In the application scenario of the LED display system, when most LED display control chips are in the full black data display state, the LED lights controlled by the LED display control chip are off, but the display-related circuits inside the chip are still working, resulting in unnecessary energy consumption. Therefore, exploring the sleep problem of the display-related circuits inside the LED display control chip when the LED display control chip is in the full black data display state is the key to reducing the power consumption of the LED display control chip. Summary of the invention

[0003] The main purpose of the present application is to provide an LED display module, an LED display system and an electronic device, which can at least solve the problem in the related art that in the fully black data display state, the display-related circuits inside the LED display control chip are still working, resulting in unnecessary energy consumption.

[0004] To achieve the above-mentioned purpose, the first aspect of the present application provides an LED display module, comprising: an LED display control chip and a plurality of LED lamps, wherein the LED display control chip comprises a signal processing circuit, a voltage stabilizing circuit and a display control circuit, wherein the signal processing circuit comprises a processing unit, a power management unit and a display data processing unit; the voltage stabilizing circuit is configured to: output a first voltage to the processing unit, the power management unit, and output a second voltage to the display data processing unit; the processing unit is configured to: parse a first display control signal to obtain target display data information of the LED display control chip, and generate a second display control signal that does not contain the target display data information signal, transmits the target display data information to the power management unit and the display data processing unit respectively, and transmits the second display control signal to the external LED display module; the display data processing unit is configured to: generate a switch control signal according to the target display data information and transmit it to the display control circuit; the display control circuit is configured to: control the corresponding LED lamp to enter a working state according to the switch control signal; the power management unit is configured to: if the display type flag in the target display data information corresponds to a full black display type, control the voltage stabilizing circuit to stop outputting the second voltage, and control the display control circuit to stop working.

[0005] A second aspect of the present application provides an LED display system, comprising a plurality of LED display modules as described in the first aspect of the present application, wherein the plurality of LED display modules are electrically connected in sequence.

[0006] A third aspect of the present application provides an electronic device, comprising the LED display module as described in the first aspect of the present application or the LED display system as described in the second aspect of the present application.

[0007] From the above description, it can be seen that the present application determines through the power management unit that the display type flag of the LED display module corresponds to the all-black display type, that is, when the display data is all-black data, a sleep control signal is generated to control the display control circuit to sleep, and at the same time, the voltage regulator stops providing voltage to the display data processing unit by controlling the voltage regulator, thereby controlling the display data processing unit to sleep. In this way, when the LED display module is in the all-black display state, the display-related circuits can be put into sleep mode to reduce the energy consumption of the LED display control chip and achieve a low-power design. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 is a structural schematic diagram of a first LED display module according to an embodiment of the present application;

[0010] Figure 2 is a structural schematic diagram of a second LED display module according to an embodiment of the present application;

[0011] Figure 3 is a structural schematic diagram of a first voltage stabilizing unit in an embodiment of the present application;

[0012] Figure 4 is a structural schematic diagram of a first type of second voltage stabilizing unit in an embodiment of the present application;

[0013] Figure 5 is a structural schematic diagram of a second voltage stabilizing unit of a second embodiment of the present application;

[0014] Figure 6 is a schematic diagram of the structure of a power management unit in an embodiment of the present application;

[0015] Figure 7 It is a schematic diagram of related signal logic of a power management unit according to an embodiment of the present application;

[0016] Figure 8 is a structural schematic diagram of a third LED display module according to an embodiment of the present application;

[0017] Fig. 9 is a structural schematic diagram of a fourth LED display module according to an embodiment of the present application;

[0018] Fig.10 It is a structural schematic diagram of an LED display system according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the purpose, features, and advantages of the invention of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0020] In the related art, since the display-related circuits inside the LED display control chip are still working when the data is displayed in full black, there is a problem of unnecessary energy consumption. For this reason, an embodiment of the present application provides an LED display module.

[0021] like Figure 1 The structure diagram of the first LED display module provided by the embodiment of the present application is shown, and the LED display module includes: an LED display control chip and a plurality of LED lamps, the LED display control chip includes a signal processing circuit, a voltage stabilizing circuit and a display control circuit, and the signal processing circuit includes a processing unit, a power management unit and a display data processing unit. Among them, the processing unit and the display data processing unit can be processing chips such as ASIC (application-specific integrated circuit), FPGA (field programmable gate array), DSP (digital signal processor), etc.

[0022] Among them, the voltage stabilizing circuit is configured to: output a first voltage to the processing unit and the power management unit, and output a second voltage to the display data processing unit; the processing unit is configured to: parse the first display control signal to obtain the target display data information of the LED display control chip, and generate a second display control signal that does not contain the target display data information, transmit the target display data information to the power management unit and the display data processing unit respectively, and transmit the second display control signal to the external LED display module; the display data processing unit is configured to: generate a switch control signal according to the target display data information and transmit it to the display control circuit; the display control circuit is configured to: control the corresponding LED lamp to enter a working state according to the switch control signal; the power management unit is configured to: if the display type flag in the target display data information corresponds to a full black display type, then control the voltage stabilizing circuit to stop outputting the second voltage, and control the display control circuit to stop working.

[0023] Specifically, in this embodiment, the voltage stabilizing circuit provides a stable power supply voltage for the processing unit, the power management unit, and the display data processing unit respectively. After receiving the first display control signal input from the outside, the input unit can obtain the target display data information of the LED display module by parsing the first display control signal. The target display data information includes the display type flag information and the display data of each LED lamp, such as the R, G, and B data information of the LED display module. At the same time, the processing unit will also generate a second display control signal, which includes the display data information of the remaining LED display modules, but does not include the target display data information; the processing unit sends the target display data information to the power management unit and the display data processing unit, and transmits the second display control signal to the LED display control chip in the next LED display module. The display data processing unit will convert the target display data information into a switch signal that can be recognized by the display control circuit, so as to control the corresponding LED lamp to enter the working state through the display control circuit. When the power management unit determines that the display type flag of the LED display module corresponds to the all-black display type, that is, when the display data is all-black data, it will generate a sleep control signal to control the display control circuit to sleep, and at the same time stop providing voltage to the display data processing unit by controlling the regulated voltage, thereby controlling the display data processing unit to sleep. In this way, when the LED display module is in the all-black display state, the display-related circuits can be put into sleep, so as to reduce the energy consumption of the LED display control chip and achieve low-power design.

[0024] like Figure 2 FIG. 1 is a schematic diagram of the structure of the second LED display module provided in the embodiment of the present application. Figure 2 The voltage stabilizing circuit includes a first voltage stabilizing unit and a second voltage stabilizing unit. The first voltage stabilizing unit is electrically connected to the power supply, the processing unit, and the power management unit respectively. The second voltage stabilizing unit is electrically connected to the power supply, the power management unit, and the display data processing unit respectively.

[0025] Specifically, in this embodiment, the voltage stabilizing circuit includes a first voltage stabilizing unit and a second voltage stabilizing unit, the first voltage stabilizing unit provides a first voltage for the processing unit and the power management unit, and the second voltage stabilizing unit provides a second voltage for the display data processing unit.

[0026] Furthermore, if Figure 3 FIG. 1 is a schematic diagram of the structure of a first voltage stabilizing unit provided in an embodiment of the present application. Figure 2 and Figure 3The first voltage stabilizing unit includes a first reference voltage source, a first power tube Q1 and a capacitor C1; a first end of the first reference voltage source is electrically connected to a power supply, a second end of the first reference voltage source is electrically connected to a first end of the first power tube Q1, a third end of the first reference voltage source is grounded, a second end of the first power tube Q1 is electrically connected to a power supply, a third end of the first power tube Q1 is electrically connected to one end of the capacitor C1, a processing unit and a power management unit respectively, and the other end of the capacitor C1 is grounded.

[0027] Specifically, in this embodiment, after the first voltage stabilizing unit is powered on, the first reference voltage source is turned on, thereby adjusting the first power tube Q1 to output a stable first voltage to provide it to the processing unit and the power management unit. By selecting a suitable capacitance value, the stability of the voltage stabilizing circuit can be improved, the fluctuation and jitter of the output voltage can be reduced, and the output voltage can be ensured to remain stable within a certain range.

[0028] Furthermore, if Figure 4 The structure diagram of the first second voltage stabilizing unit provided in the embodiment of the present application is shown in FIG. Figure 2 and Figure 4 The second voltage stabilizing unit includes a second reference voltage source, an error amplifier, a first switch tube K10, a second switch tube K11, a second power tube Q2 and a feedback unit; the first ends of the first switch tube K10 and the second switch tube K11 are both electrically connected to the power supply, the second ends of the first switch tube K10 and the second switch tube K11 are both electrically connected to the power management unit, the third end of the first switch tube K10 is electrically connected to the first end of the second reference voltage source, the third end of the second switch tube K11 is electrically connected to the first end of the error amplifier, the second end of the reference voltage source is electrically connected to the second end of the error amplifier, the third end of the reference voltage source is grounded, the third end of the error amplifier is electrically connected to the feedback unit, the fourth end of the error amplifier is electrically connected to the first end of the second power tube Q2, the second end of the second power tube Q2 is electrically connected to the power supply, and the third end of the second power tube Q2 is electrically connected to the feedback unit and the display data processing unit respectively.

[0029] Furthermore, if Figure 5 FIG. 1 is a schematic diagram of the structure of the second voltage stabilizing unit provided in the embodiment of the present application, see Figure 2 , Figure 4 and Figure 5 The feedback unit includes a first feedback resistor R1 and a second feedback resistor R2, one end of the first feedback resistor R1 is electrically connected to the third end of the second power tube Q2, the other end of the first feedback resistor R1 is electrically connected to one end of the second feedback resistor R2 and the third end of the error amplifier, and the other end of the second feedback resistor R2 is grounded.

[0030] Specifically, in the present embodiment, the second voltage stabilizing unit includes a reference voltage source, an error amplifier, a first switch tube K10, a second switch tube K11, a second power tube Q2, and a feedback unit. When the two switch tubes K10 and K11 receive a wake-up signal, the second voltage stabilizing unit is awakened, and the error amplifier adjusts the second power tube Q2 in real time through the second reference voltage source and the feedback unit to output a stable second voltage. When the two switch tubes K10 and K11 receive a sleep signal, the second voltage stabilizing unit enters a sleep state, and no second voltage is output. In the present embodiment, the feedback unit can be composed of two feedback resistors, and the output voltage is sampled by the two feedback resistors and fed back to the error amplifier, so that the second power tube Q2 can be adjusted in real time to output a stable second voltage.

[0031] like Figure 6 FIG. 1 is a schematic diagram of a power management unit provided in an embodiment of the present application. Figure 2 and Figure 6 The power management unit includes a discriminator, an OR gate circuit, a NOT gate circuit and a latch; the discriminator is electrically connected to the processing unit, the OR gate circuit and the NOT gate circuit respectively, and the latch is electrically connected to the OR gate circuit, the NOT gate circuit, the voltage stabilizing circuit and the display control circuit respectively.

[0032] Specifically, the power management unit is specifically configured as follows: the discriminator obtains the processing completion flag and the display type flag in the target display data information, transmits the level signal of the processing completion flag to the OR gate circuit, and transmits the level signal of the display type flag to the OR gate circuit and the NOT gate circuit respectively; when the level signals of the processing completion flag and the display type flag are both low, the OR gate circuit outputs a low level signal to the reset end of the latch; wherein, when the level signal of the processing completion flag is low, the display data processing of all LED lights is completed; when the level signal of the display type flag is low, the display type flag in the target display data information corresponds to a full black display type; when the level signal of the display type flag is low, the NOT gate circuit outputs a high level signal to the set end of the latch when the level signal of the display type flag is low; when the reset end of the latch is low and the set end is high, the voltage stabilizing circuit is controlled to stop outputting the second voltage, and the display control circuit is controlled to stop working.

[0033] In this embodiment, the LED display control chip drives the LED lights corresponding to the R, G, and B channels to display colors. The black data is the data when the LED lights are off, and the non-black data is the data when the LED lights are on. The all-black data means that the display data corresponding to the three LED lights R, G, and B are all black data, and the non-all-black data means that one or more of the display data corresponding to the three LED lights R, G, and B are non-black data. When all-black data is received, the LED display module is in a all-black display state; when non-all-black data is received, the display chip is in a non-all-black display state. The discriminator in the power management unit discriminates the display data information and obtains the display identification flag information and the processing completion flag information. When the display data corresponding to all LED lights in the display data information, such as the three LED lights R, G, and B, are all black data, the display type flag is low level, otherwise it is high level. Among them, the display type flag is at a low level after power-on, and the processing unit will update the display type flag information after completing the display data processing of this chip; the processing completion flag is at a high level after power-on, and after the processing unit completes the display data processing of all chips in the system, the processing completion flag is pulled low for a certain period of time and then restored to a high level; the latch outputs a low level as a wake-up signal and a high level as a sleep signal; the output end of the latch is at a low level after power-on, the display type flag is at a low level and after a logic NOT gate operation, the set end of the latch receives a high level signal, which is invalid and will not cause the latch to change the level type of the output signal, while the processing completion flag is at a high level at this time, and after the display type flag and the processing completion flag are subjected to a logic OR operation, the reset end of the latch receives a high level signal, which is invalid, and the latch remains at a low level, that is, the output wake-up signal.

[0034] The relevant signal logic of the power management unit is as follows Figure 7 As shown, when the display data is not all-black data, the display type flag is updated to a high level. After the logic NOT gate operation, the set end of the latch receives a low level signal, which is valid. After the latch is set, it outputs a wake-up signal to the two switch tubes K10 and K11 of the second voltage stabilizing unit to close it. At this time, the display data processing unit receives the target display data information and generates a switch control signal to transmit to the display control circuit; at the same time, after the latch is set, it outputs a wake-up signal to the display control circuit to control its opening; at this time, the processing completion flag is a high level. After the display type flag and the processing completion flag are operated by the logic OR gate, the latch reset end receives a high level signal, which is invalid, and the latch keeps outputting the wake-up signal. After the processing completion flag is updated, it is a low level for a certain period of time, the display type flag is a high level, and the latch reset end after the logic OR gate operation receives a high level signal, which is invalid, and the latch keeps outputting the wake-up signal.

[0035] When the display data is all black data, the display type flag is updated to a low level. After the logic NOT gate operation, the set end of the latch receives a high level signal, which is invalid. At this time, the processing completion flag is a high level. After the display type flag and the processing completion flag are logically ORed, the latch reset end receives a high level signal, which is invalid, and the latch maintains the wake-up / sleep signal (that is, the previous signal state). After the processing completion flag is updated, the display type flag is a low level during a certain period of low level. After the logic OR operation, the latch reset end receives a low level signal, which is valid. The latch outputs a sleep signal to the two switch tubes K10 and K11 of the second voltage stabilizing unit to disconnect them, thereby stopping the power supply to the display data processing unit. At this time, the display data processing unit has no response to the target display data information and does not output a switch control signal to the display control unit; at the same time, the latch outputs a sleep signal to the display control circuit to control it to stop working. Therefore, in the all-black display state, the circuits that are still working in the LED display module are as follows: Figure 8 As shown, the second voltage stabilizing unit in the voltage stabilizing circuit, the display data processing unit in the signal processing circuit, the reference current source in the display control circuit, the LED light switch control unit, and the clock control unit all enter a dormant state. The first voltage stabilizing unit continues to provide the first voltage to the processing unit and the power management unit in the signal processing circuit, maintaining the data processing of the LED display control chip and the data communication between the next LED display control chip. As a result, the LED display control chip reduces the energy consumption of the second voltage stabilizing unit in the voltage stabilizing circuit, the display data processing unit in the signal processing circuit, the reference current source in the display control circuit, the LED light switch control unit, and the clock control unit. At the same time, the LED lights corresponding to the R, G, and B channels are turned off, which can effectively reduce the energy consumption of the LED display control chip and achieve a low-power design.

[0036] like Fig. 9 FIG. 4 is a schematic diagram of the structure of the fourth LED display module provided in the embodiment of the present application. Figure 2 and Fig. 9The display control circuit includes a reference current source, a clock control unit, an LED light switch control unit and a third switch tube K2; the first end of the third switch tube K2 is electrically connected to the power supply, the second end of the third switch tube K2 is electrically connected to the power management unit, the third end of the third switch tube K2 is electrically connected to the reference current source, the clock control unit and the first end of the LED light switch control unit respectively, the second end of the LED light switch control unit is electrically connected to the clock control unit, the third end of the LED light switch control unit is electrically connected to the reference current source, the fourth end of the LED light switch control unit is electrically connected to the display data processing unit, and the fifth end of the LED light switch control unit is electrically connected to multiple LED lights respectively; the LED light switch control unit is configured to: control the corresponding LED light to enter the working state according to the switch control signal. Among them, the LED light switch control unit is a switch array, each switch corresponds to an LED light respectively, and the corresponding LED can be controlled to light up or extinguish by controlling the corresponding switch to turn on or off.

[0037] In this embodiment, the display control circuit structure includes a reference current source, a clock control unit, an LED light switch control unit and a third switch tube K2. In addition, Fig. 9 The switch tube K1 in the display control circuit includes a first switch tube K10 and a second switch tube K11. When the third switch tube K2 receives a wake-up signal transmitted by the power management unit, the display control circuit is awakened, the reference current source provides a reference current for the LED light switch control unit, and the clock control unit provides a clock signal for the LED light switch control unit. After the LED light switch control unit receives a switch control signal transmitted by the display data processing unit, the LED lights corresponding to R, G, and B are turned on. When the third switch tube K2 receives a sleep signal transmitted by the power management unit, the reference current source, the clock control unit, and the LED light switch control unit have no power input, the display control circuit enters a sleep state, and the LED lights corresponding to R, G, and B are turned off.

[0038] The LED display module provided in the embodiment of the present application determines through the power management unit that the display type flag of the LED display module corresponds to the full-black display type, that is, when the display data is full-black data, a sleep control signal is generated to control the display control circuit to sleep, and at the same time, the voltage regulator stops providing voltage to the display data processing unit by controlling the voltage regulator, thereby controlling the display data processing unit to sleep. In this way, when the LED display module is in the full-black display state, the circuits related to the display can be put into sleep, so as to reduce the energy consumption of the LED display control chip and realize low-power design.

[0039] The embodiment of the present application further provides an LED display system, which includes a plurality of the above-mentioned LED display modules, and the plurality of LED display modules are electrically connected in sequence.

[0040] Specifically, Fig.10Take the LED display system shown as an example, the LED display system includes 4 LED display modules. Assuming that the display data received by the LED display control chip 1 is {R=1, G=1, B=1}, the display data received by the LED display control chip 2 is {R=1, G=1, B=0}, and the display data received by the LED display control chip 3 is {R=1, G=0, B=0}, the LED display control chips 1, 2, and 3 enter a non-full black display state, and the LED light switch control unit receives the switch control signal transmitted by the display data processing unit to light up the corresponding LED light. The display data received by the LED display control chip 4 is {R=0, G=0, B=0}, and the LED display control chip 4 enters a full black display state. The first voltage stabilizing unit continues to provide voltage to the processing unit and the power management unit of the signal processing circuit to maintain the data processing of the LED display control chip and the data communication between the next chip. When the LED display control chip 4 receives the full black display data, the LED lights corresponding to the R, G, and B channels are turned off, and the display effect is the same as that of the traditional LED display module. However, compared with the traditional LED display module, the LED display module in this embodiment reduces the energy consumption of the second voltage stabilizing unit of the voltage stabilizing circuit, the display data processing unit of the signal processing circuit, the reference current source of the display control circuit, the LED light switch control unit and the clock control unit when processing all-black data, reduces heat generation, reduces heat dissipation requirements, and improves overall energy efficiency.

[0041] The embodiment of the present application further provides an electronic device, which includes the above-mentioned LED display module or LED display system. The electronic device may include but is not limited to lighting products, power supply products, and display devices.

[0042] It should be noted that the various embodiments in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0043] It should also be noted that, in the content of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can expressly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0044] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown in the present application, but will conform to the widest range consistent with the principles and novel features disclosed in the present application.

Claims

1. An LED display module, characterized in that: include: An LED display control chip and a plurality of LED lamps, wherein the LED display control chip comprises a signal processing circuit, a voltage stabilizing circuit and a display control circuit, and the signal processing circuit comprises a processing unit, a power management unit and a display data processing unit; The voltage stabilizing circuit is configured to: output a first voltage to the processing unit and the power management unit, and output a second voltage to the display data processing unit; The processing unit is configured to: parse the first display control signal to obtain the target display data information of the LED display control chip, and generate a second display control signal that does not contain the target display data information, transmit the target display data information to the power management unit and the display data processing unit respectively, and transmit the second display control signal to an external LED display module; The display data processing unit is configured to: generate a switch control signal according to the target display data information and transmit the switch control signal to the display control circuit; The display control circuit is configured to: control the corresponding LED lamp to enter a working state according to the switch control signal; The power management unit is configured to: if the display type flag in the target display data information corresponds to a full black display type, control the voltage stabilizing circuit to stop outputting the second voltage, and control the display control circuit to stop working.

2. The LED display module according to claim 1, characterized in that: The voltage stabilizing circuit includes a first voltage stabilizing unit and a second voltage stabilizing unit. The first voltage stabilizing unit is electrically connected to the power supply, the processing unit, and the power management unit respectively. The second voltage stabilizing unit is electrically connected to the power supply, the power management unit, and the display data processing unit respectively.

3. The LED display module according to claim 2, characterized in that: The first voltage stabilizing unit includes a first reference voltage source, a first power tube and a capacitor; The first end of the first reference voltage source is electrically connected to the power supply, the second end of the first reference voltage source is electrically connected to the first end of the first power tube, the third end of the first reference voltage source is grounded, the second end of the first power tube is electrically connected to the power supply, the third end of the first power tube is respectively electrically connected to one end of the capacitor, the processing unit and the power management unit, and the other end of the capacitor is grounded.

4. The LED display module according to claim 2, characterized in that: The second voltage stabilizing unit includes a second reference voltage source, an error amplifier, a first switch tube, a second switch tube, a second power tube and a feedback unit; The first ends of the first switch tube and the second switch tube are both electrically connected to the power supply, the second ends of the first switch tube and the second switch tube are both electrically connected to the power management unit, the third end of the first switch tube is electrically connected to the first end of the second reference voltage source, the third end of the second switch tube is electrically connected to the first end of the error amplifier, the second end of the reference voltage source is electrically connected to the second end of the error amplifier, the third end of the reference voltage source is grounded, the third end of the error amplifier is electrically connected to the feedback unit, the fourth end of the error amplifier is electrically connected to the first end of the second power tube, the second end of the second power tube is electrically connected to the power supply, and the third end of the second power tube is electrically connected to the feedback unit and the display data processing unit respectively.

5. The LED display module according to claim 4, characterized in that: The feedback unit includes a first feedback resistor and a second feedback resistor, one end of the first feedback resistor is electrically connected to the third end of the second power tube, the other end of the first feedback resistor is electrically connected to one end of the second feedback resistor and the third end of the error amplifier respectively, and the other end of the second feedback resistor is grounded.

6. The LED display module according to claim 1, characterized in that: The power management unit includes a discriminator, an OR gate circuit, a NOT gate circuit and a latch; the discriminator is electrically connected to the processing unit, the OR gate circuit and the NOT gate circuit respectively, and the latch is electrically connected to the OR gate circuit, the NOT gate circuit, the voltage stabilizing circuit and the display control circuit respectively.

7. The LED display module according to claim 6, characterized in that: The power management unit is specifically configured as follows: The discriminator obtains the processing completion flag and the display type flag in the target display data information, transmits the level signal of the processing completion flag to the OR gate circuit, and transmits the level signal of the display type flag to the OR gate circuit and the NOT gate circuit respectively; When the level signals of the processing completion flag and the display type flag are both at low levels, the OR gate circuit outputs a low level signal to the reset end of the latch; wherein, when the level signal of the processing completion flag is at a low level, the display data processing of all the LED lights is completed; when the level signal of the display type flag is at a low level, the display type flag in the target display data information corresponds to a full black display type; When the level signal of the display type flag is at a low level, the NOT gate circuit outputs a high level signal to the set end of the latch; When the reset terminal of the latch is at a low level and the set terminal is at a high level, the voltage stabilizing circuit is controlled to stop outputting the second voltage, and the display control circuit is controlled to stop working.

8. The LED display module according to claim 1, characterized in that: The display control circuit includes a reference current source, a clock control unit, an LED light switch control unit and a third switch tube; The first end of the third switch tube is electrically connected to the power supply, the second end of the third switch tube is electrically connected to the power management unit, the third end of the third switch tube is electrically connected to the reference current source, the clock control unit and the first end of the LED light switch control unit respectively, the second end of the LED light switch control unit is electrically connected to the clock control unit, the third end of the LED light switch control unit is electrically connected to the reference current source, the fourth end of the LED light switch control unit is electrically connected to the display data processing unit, and the fifth end of the LED light switch control unit is electrically connected to the plurality of LED lights respectively; The LED lamp switch control unit is configured to control the corresponding LED lamp to enter a working state according to the switch control signal.

9. An LED display system, characterized in that: It comprises a plurality of LED display modules according to any one of claims 1 to 8, wherein the plurality of LED display modules are electrically connected in sequence.

10. An electronic device, characterized in that: It comprises the LED display module according to any one of claims 1 to 8 or the LED display system according to claim 9.

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