Power supply control system, LED all-in-one machine, and electronic device

Abstract

The present application is applicable to the technical field of LED all-in-one machines, and provides a power supply control system, an LED all-in-one machine, and an electronic device. The power supply control system comprises n switch modules and n power module arrays; each power module array comprises a plurality of power modules connected in parallel; the n switch modules correspond to the n power module arrays on a one-to-one basis; each switch module is electrically connected to all of the power modules in the corresponding power module array; all of the switch modules are used for electrically connecting to a power supply device; each power module is used for electrically connecting to a corresponding load.

Description

Power supply control system, LED all-in-one machine and electronic equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202422832573.2, filed on November 19, 2024, entitled “Power Supply Control System, LED All-in-One Machine and Electronic Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of LED all-in-one machine technology, and particularly relates to a power supply control system, an LED all-in-one machine and electronic equipment. Background Technology

[0004] An LED (Light-Emitting Diode) all-in-one display is a screen composed of multiple unit cabinets. Each unit cabinet integrates a power module, a receiver card, and an LED light board. Because the LED all-in-one display is made up of multiple unit cabinets, the power inputs of all its power modules are connected in parallel. Upon power-on, these power modules simultaneously charge all the load capacitors, enabling the LED all-in-one display to function normally. However, if one or more power modules malfunction and require repair, this will affect the normal operation of the entire display screen. Summary of the Invention

[0005] This application provides a power supply control system, an LED all-in-one machine, and an electronic device, which can solve the problem that when one or more power modules of an existing LED all-in-one machine fail and need maintenance, the normal operation of the entire display screen will be affected.

[0006] In a first aspect, embodiments of this application provide a power supply control system, including n switching modules and n power module arrays. Each power module array includes multiple power modules connected in parallel. The n switching modules correspond one-to-one with the n power module arrays. Each switching module is electrically connected to all power modules in its corresponding power module array. All switching modules are used to be electrically connected to power supply equipment, and each power module is used to be electrically connected to its corresponding load.

[0007] When the switch module is turned on, all power modules in the power module array corresponding to the switch module are connected to the power supply equipment, and the power modules supply power to the corresponding load; where n is an integer, n>1.

[0008] In one possible implementation of the first aspect, the (m+1)th switch module is turned on when the conduction time of the m-th switch module reaches a preset time, where m is an integer and 1 ≤ m < n.

[0009] In one possible implementation of the first aspect, the preset time is greater than or equal to 100 milliseconds.

[0010] In one possible implementation of the first aspect, the switching module includes a relay, a first conducting terminal of the relay for electrical connection to a power supply device, a second conducting terminal of the relay for electrical connection to all power modules in the corresponding power module array, a first terminal of the control coil of the relay for receiving a first control signal, and a second terminal of the control coil of the relay for electrical connection to a first power source.

[0011] In one possible implementation of the first aspect, the switching module further includes a first switching transistor, the gate of which is used to receive a second control signal, the drain of which is electrically connected to a first terminal of the control coil of the relay, and the source of which is grounded.

[0012] In one possible implementation of the first aspect, the switching module further includes a first diode, the anode of which is electrically connected to a first terminal of the control coil of the relay, and the cathode of which is electrically connected to a second terminal of the control coil of the relay.

[0013] In one possible implementation of the first aspect, all power modules in each power module array are arranged in a straight line.

[0014] In one possible implementation of the first aspect, the power supply control system further includes a control module electrically connected to all switching modules, which is used to output a corresponding control signal to each switching module.

[0015] Secondly, embodiments of this application provide an LED all-in-one machine, including the power supply control system described in any one of the first aspects.

[0016] Thirdly, embodiments of this application provide an electronic device, including the LED all-in-one machine described in the second aspect.

[0017] The advantages of the embodiments in this application compared with related technologies are:

[0018] The power supply control system provided in this application includes n switching modules and n power module arrays, with each power module array comprising multiple power modules connected in parallel. The n switching modules correspond one-to-one with the n power module arrays, and each switching module is electrically connected to all power modules in its corresponding power module array. When a switching module is turned on, all power modules in the power module array connected to the switching module are connected to the power supply equipment and receive the voltage output from the power supply equipment, supplying power to the corresponding load. Therefore, the power supply control system provided in this application sets multiple power modules into a power module array and connects them in series with a switching module. This design allows the connection between the power modules and the power supply equipment to be determined by turning the switching modules on and off, thereby achieving block control. Even if one or more power modules fail and require maintenance, only the switching module connected to the power module array containing the failed power module needs to be turned off, without affecting the normal operation of the entire display screen. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 is a schematic block diagram of a power supply control system provided in an embodiment of this application;

[0021] Figure 2 is a circuit connection diagram of a power supply control system provided in an embodiment of this application;

[0022] Figure 3 is a circuit connection diagram of a switch module provided in an embodiment of this application;

[0023] Figure 4 is a schematic block diagram of a power supply control system provided in another embodiment of this application;

[0024] Figure 5 is a control timing diagram of a control module provided in an embodiment of this application.

[0025] In the diagram: 10, power supply control system; 101, switch module; 102, power module array; 1021, power module; 103, control module; 20, power supply equipment. Detailed Implementation

[0026] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0027] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0028] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [the described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [the described condition or event] is detected," or "in response to detection of [the described condition or event]."

[0030] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0032] Since an LED all-in-one display is composed of multiple unit cabinets, all its power supply modules are connected in parallel. Upon power-on, these power modules simultaneously charge all load capacitors, enabling the LED all-in-one display to function correctly. However, if one or more power modules malfunction and require repair, this will affect the normal operation of the entire display screen.

[0033] Based on the above problems, the power supply control system provided in this application includes n switching modules and n power module arrays, with each power module array comprising multiple power modules connected in parallel. The n switching modules correspond one-to-one with the n power module arrays, and each switching module is electrically connected to all power modules in its corresponding power module array. When a switching module is turned on, all power modules in the power module array connected to the switching module are connected to the power supply equipment and receive the voltage output from the power supply equipment, supplying power to the corresponding load. Therefore, the power supply control system provided in this application sets multiple power modules into a power module array and connects them in series with a switching module. This design allows the connection between the power modules and the power supply equipment to be determined by turning the switching modules on and off, thereby achieving block control. Even if one or more power modules fail and require maintenance, only the switching module connected to the power module array containing the failed power module needs to be turned off, without affecting the normal operation of the entire display screen.

[0034] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0035] Figure 1 shows a schematic block diagram of a power supply control system 10 provided in an embodiment of this application. Referring to Figure 1, the power supply control system 10 includes n switching modules 101 and n power module arrays 102. Each power module array 102 includes multiple power modules 1021 connected in parallel. Each of the n switching modules 101 corresponds one-to-one with each of the n power module arrays 102. Each switching module 101 is electrically connected to all power modules 1021 in its corresponding power module array 102. All switching modules 101 are used for electrical connection to the power supply equipment 20, and each power module 1021 is used for electrical connection to its corresponding load. Here, n is an integer, n > 1.

[0036] Specifically, when the switch module 101 is turned on, all power modules 1021 in the power module array 102 connected to the switch module 101 are connected to the power supply device 20 and receive the voltage output by the power supply device 20 to supply power to the corresponding load. Therefore, the power supply control system 10 provided in this embodiment sets multiple power modules 1021 into a power module array 102 and connects them in series with a switch module 101. This design allows the connection between the power modules 1021 and the power supply device 20 to be determined by turning the switch module 101 on and off, thereby achieving block control. Even if one or more power modules 1021 fail and require maintenance, it is only necessary to turn off the switch module 101 connected to the power module array 102 containing the failed power module 1021, without affecting the normal operation of the entire display screen.

[0037] It should be noted that when the switch module 101 is turned on, the power module 1021 is connected to the power supply device 20, and the voltage output by the power supply device 20 is AC power from the mains. In Figure 1, the first digit of the serial number of the power module 1021 represents the column number, and the second digit represents the row number, thus forming a matrix arrangement.

[0038] It should be noted that when the switch module 101 is turned off, the power module 1021 and the power supply equipment 20 can be disconnected. The power module 1021 has zero leakage current and zero standby power, achieving energy saving and environmental protection, and also preventing damage to the LED all-in-one machine from lightning strikes to the power grid. Furthermore, by disconnecting the faulty power module array 102 from the power supply equipment 20, downtime is reduced and maintenance procedures are simplified, lowering repair costs while maintaining continuous system operation. Moreover, during maintenance, the safety of maintenance personnel can be ensured, avoiding potential dangers caused by the continuous power supply from the power module 1021.

[0039] Because the LED all-in-one machine is composed of multiple unit cabinets, the power input of all power modules is connected in parallel. At the moment of power-on, multiple load capacitors will be charged at the same time, which will generate a large surge current and leakage current, which can easily cause the overcurrent protection switch and leakage protection switch in the power grid to trip.

[0040] To address the aforementioned issues, in one embodiment of this application, the power supply control system 10 can further ensure that the (m+1)th switch module 101 is turned on when the turn-on time of the mth switch module 101 reaches a preset time. Here, m is an integer, and 1 ≤ m < n.

[0041] Specifically, multiple power modules are configured into a power module array, and segmented and time-sequential control is performed. All load capacitors in each segment are charged sequentially, so that the load capacitors corresponding to different segments are not charged at the same time. This ensures that each power module array supplies power to the load at different times, which can avoid the LED all-in-one machine generating large surge current and leakage current at the moment of power-on, thereby avoiding the overcurrent protection switch and leakage protection switch in the power grid from tripping.

[0042] It should be noted that, in order to achieve the goal of turning on the (m+1)th switch module 101 when the turn-on time of the mth switch module 101 reaches the preset time, a time relay can be connected between adjacent switch modules 101, or a timer circuit or a trigger circuit can be used.

[0043] In one embodiment of this application, the preset time is greater than or equal to 100 milliseconds.

[0044] Specifically, under normal circumstances, the duration of surge current and leakage current is within tens of milliseconds. Therefore, setting the preset time to greater than or equal to 100 milliseconds can effectively disperse the stacking of surge current and leakage current, ensure the stable operation of the power grid and load, and avoid equipment damage or frequent malfunctions of protection devices caused by current surges.

[0045] It should be noted that designers can adjust the preset time according to the actual surge current and leakage current and the actual needs of the equipment; no limitation is imposed here.

[0046] In one embodiment of this application, all power modules 1021 in each power module array 102 are arranged in a straight line.

[0047] Specifically, as shown in Figure 1, all power modules 1021 in each power module array 102 are arranged in a column, and each column of power modules 1021 constitutes a power module array 102. This arrangement makes monitoring and status detection of the power modules 1021 more convenient, allowing for quick understanding of the module's operating status through visual inspection. Furthermore, this design facilitates expansion; when additional power modules 1021 are needed, expansion can be made along the column direction without affecting the layout of power modules 1021 in other columns.

[0048] It should be noted that, as shown in Figure 2, each unit box contains a power module 1021, and multiple unit boxes constitute an integrated LED machine.

[0049] In one embodiment of this application, as shown in Figures 1 and 2, the switch module 101 includes a relay. The first conducting terminal of the relay is electrically connected to the power supply device 20, and the second conducting terminal of the relay is electrically connected to all power modules 1021 in the corresponding power module array 102. The first terminal of the control coil of the relay is used to receive a first control signal, and the second terminal of the control coil of the relay is used to be electrically connected to the first power supply DC_VDD.

[0050] Specifically, K1, K2, K3...Kn in Figure 2 are all relays. As a switching device, a normally open relay can be selected. When the first terminal of the relay's control coil receives the first control signal (such as a low-level signal), the relay's control coil is energized, and the relay closes. The first and second conducting terminals of the relay are connected, and the power module 1021 is connected to the power supply device 20, receiving the voltage output by the power supply device 20 to supply power to the load.

[0051] It should be noted that the first control signal can be generated by a microcontroller, a single-chip microcomputer, a manual switch, or a button, thereby closing the relay.

[0052] It should be noted that other switching devices can be used, such as optocouplers instead of relays. The first terminal of the optocoupler's LED is connected to a 3.3V power supply, and the second terminal is grounded. The collector of the optocoupler's transistor is connected to the power supply device 20, and the emitter of the optocoupler's transistor is connected to all power modules 1021 in the corresponding power module array 102. Compared to relays, which require a 12V power supply, using optocouplers, which only require a 3.3V power supply, reduces the system's power supply voltage requirements, reduces power consumption, and simplifies circuit design. Furthermore, relays are mechanical switches that require engagement and disengagement to switch the circuit on and off, while optocouplers use solid-state semiconductor devices, resulting in more sensitive and faster responses without mechanical movement. Therefore, optocouplers have significant advantages in high-speed switching applications.

[0053] In one embodiment of this application, as shown in FIG3, the switching module 101 further includes a first switching transistor. The gate of the first switching transistor is used to receive a second control signal, the drain of the first switching transistor is electrically connected to the first terminal of the control coil of the relay, and the source of the first switching transistor is grounded.

[0054] Specifically, Q1 to Qn in Figure 3 are all first switching transistors. These first switching transistors act as switching devices, used to turn on and off according to the second control signal. When the second control signal is high, the first switching transistor is turned on, meaning there is a connection between its drain and source. At this time, the first terminal of the relay's control coil is pulled low, energizing the relay's control coil and closing the relay. When the second control signal is low, the first switching transistor is turned off, meaning there is no connection between its drain and source. At this time, no current flows through the relay's control coil, and the relay opens.

[0055] It should be noted that transistors or other field-effect transistors can be selected to replace the first switching transistor, and no limitation is made here.

[0056] For example, designers can select the type of the first switching transistor according to the actual situation, that is, they can use fully controllable power devices such as metal-oxide-semiconductor field-effect transistors or insulated-gate bipolar transistors. For example, the first switching transistor can be an NMOS transistor. Alternatively, the first switching transistor can be a PMOS transistor, and the control signal output by the control module 103 can be adjusted accordingly.

[0057] In one embodiment of this application, as shown in FIG3, the switch module 101 further includes a first diode, the anode of the first diode being electrically connected to a first terminal of the control coil of the relay, and the cathode of the first diode being electrically connected to a second terminal of the control coil of the relay.

[0058] Specifically, in Figure 3, D1 to Dn are all first diodes, which act as freewheeling diodes. When the relay's control coil is de-energized, due to the principle of electromagnetic induction, the control coil generates an electromotive force (EMF) in the opposite direction to the original voltage, called back EMF or self-induced EMF. This back EMF can be very high, enough to damage the electronic components in the control circuit. By connecting a first diode in parallel across the relay's control coil, a discharge path can be provided. When the back EMF is generated, the first diode conducts, allowing current to flow through it, thereby rapidly releasing the energy in the control coil and protecting the circuit components from damage.

[0059] For example, the first diode can be a Schottky diode to quickly turn on, thereby increasing the discharge speed of the control coil.

[0060] It should be noted that the first terminal of the control coil of the relay in the switch module 101 shown in Figure 3 can receive a first control signal (such as a high-level signal), the second terminal of the relay control coil is grounded, the cathode of the first diode is electrically connected to the first terminal of the relay control coil, and the anode of the first diode is electrically connected to the second terminal of the relay control coil. The working principle of this circuit design is similar to that described above, and it can achieve the same technical effect. Further details will not be provided here.

[0061] It should be noted that if an optocoupler is used to replace the relay mentioned above, since the optocoupler does not have a control coil inside, it will not store or release energy, and there is no need to set up a first diode for discharge, which simplifies the circuit design of the switching module 101 and reduces the circuit design cost.

[0062] In one embodiment of this application, as shown in FIG3 or FIG4, the power supply control system 10 further includes a control module 103, which is electrically connected to all switch modules 101 and is used to output a corresponding control signal to each switch module 101.

[0063] Specifically, the control module 103 can output a control signal to the switch module 101, causing the switch module 101 to turn on and off according to the control signal, thereby controlling the connection between the power supply module 1021 and the power supply equipment 20. The control signal can be a step signal; that is, when the control signal is low, the switch module 101 is on; when the control signal is high, the switch module 101 is off.

[0064] It should be noted that when supplying power to multiple loads, the control module 103 controls the (m+1)th switch module 101 to conduct when the conduction time of the m-th switch module 101 reaches a preset time. Therefore, this application uses the control module 103 to sequentially output corresponding control signals to each switch module 101 according to a preset time interval. That is, the control module 103 performs time-sequential control, charging all load capacitors in each block sequentially, ensuring that the load capacitors in different blocks are not charged simultaneously. This ensures that each power module array 102 supplies power to the load at different times, thus avoiding large surge currents and leakage current generated at the moment of power-on of the LED integrated machine, thereby preventing the overcurrent protection switch and leakage current protection switch in the power grid from tripping.

[0065] In one embodiment of this application, as shown in FIG3, the control module 103 includes a control chip MCU, which is electrically connected to all the switch modules 101.

[0066] Specifically, the control chip MCU is a programmable control chip, which can be programmed to perform time-sequence control on all switch modules 101, thereby avoiding large surge current and leakage current generated when the LED all-in-one machine is powered on.

[0067] It should be noted that, as shown in Figure 5, the first control signal output from the GPIO_1 pin of the control chip MCU is transmitted to the first switch module 101. When the first control signal is high for a preset time, the second control signal output from the GPIO_2 pin of the control chip MCU is also high, and so on. The control chip MCU performs timing control on the output control signals, ensuring that the high-level signal delay from adjacent control pins (GPIO_1 to GPIO_n) is greater than or equal to 100 milliseconds, thus ensuring that each relay closes in a time-division multiplexing manner. In Figure 5, 100 milliseconds is denoted as 100ms, and MIN is the minimum delay of the output high-level signal.

[0068] This application also discloses an LED all-in-one machine, including the aforementioned power supply control system 10, which performs segmented and time-sequenced control on the LED all-in-one machine. This can prevent the LED all-in-one machine from generating large surge currents and leakage currents at the moment of power-on, thereby preventing the overcurrent protection switch and leakage protection switch in the power grid from tripping.

[0069] This application also discloses an electronic device, including the aforementioned LED all-in-one machine. Using the aforementioned LED all-in-one machine can reduce the failure rate of the electronic device, extend its service life, and improve the user experience.

[0070] Since the processing and functions implemented by the LED all-in-one machine and electronic equipment in this embodiment are basically the same as the embodiments, principles and examples of the aforementioned power supply control system, any details not covered in this embodiment can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0071] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 application, and should all be included within the protection scope of this application.

Claims

1. A power supply control system, comprising n switching modules and n power module arrays, each power module array comprising multiple power modules connected in parallel, the n switching modules corresponding one-to-one with the n power module arrays, each switching module being electrically connected to all the power modules in its corresponding power module array, all switching modules being used for electrical connection with power supply equipment, and each power module being used for electrical connection with a corresponding load; When the switch module is turned on, all the power modules in the array of power modules corresponding to the switch module are turned on with the power supply device, and the power modules supply power to corresponding loads; wherein, n is an integer, n > 1.

2. The power supply control system of claim 1, wherein, When the conduction time of the m-th switch module reaches the preset time, the (m+1)-th switch module is turned on, where m is an integer and 1 ≤ m < n.

3. The power supply control system of claim 2, wherein, The preset time is greater than or equal to 100 milliseconds.

4. The power supply control system of claim 1, wherein, The switching module includes a relay, the first conducting terminal of the relay is used to be electrically connected to the power supply equipment, the second conducting terminal of the relay is electrically connected to all the power modules in the corresponding power module array, the first terminal of the control coil of the relay is used to receive a first control signal, and the second terminal of the control coil of the relay is used to be electrically connected to a first power source.

5. The power supply control system according to claim 4, wherein the switching module further comprises a first switching transistor, the gate of the first switching transistor is used to receive a second control signal, the drain of the first switching transistor is electrically connected to the first terminal of the control coil of the relay, and the source of the first switching transistor is grounded.

6. The power supply control system of claim 5, wherein, The first switching transistor includes an NMOS transistor or a PMOS transistor.

7. The power supply control system according to claim 5, wherein the switching module further comprises a first diode, the anode of the first diode being electrically connected to a first terminal of the control coil of the relay, and the cathode of the first diode being electrically connected to a second terminal of the control coil of the relay.

8. The power supply control system of claim 7, wherein, The first diode includes a Schottky diode.

9. The power supply control system of any of claims 4-8, wherein, The relays include normally open relays.

10. The power supply control system of claim 1, wherein, The switching module includes an optocoupler light-emitting diode, with the first end of the light-emitting diode connected to a 3.3V power supply and the second end of the light-emitting diode grounded.

11. The power supply control system of claim 1, wherein, The switching module includes an optocoupler transistor, the collector of which is connected to the power supply device, and the emitter of which is connected to all power modules in the corresponding power module array.

12. The power supply control system of claim 1, wherein, All the power modules in each power module array are arranged in a straight line.

13. The power supply control system according to any one of claims 1-8, wherein the power supply control system further comprises a control module, the control module being electrically connected to all the switch modules, and the control module being used to output a corresponding control signal to each of the switch modules.

14. The power supply control system of claim 13, wherein, The control module is configured to control the (m+1)th switch module to conduct when the conduction time of the mth switch module reaches a preset time.

15. The power supply control system of claim 13, wherein, The control module includes a control chip, which is electrically connected to all the switch modules. The control chip includes a programmable control chip.

16. An LED all-in-one machine, comprising the power supply control system as described in any one of claims 1-15.

17. An electronic device comprising the LED all-in-one machine as described in claim 16.

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