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

Abstract

The utility model is suitable for the technical field of LED all-in-one machines, and provides a power supply control system, an LED all-in-one machine and electronic equipment, the power supply control system comprises n switch modules and n power supply module arrays, each power supply module array comprises a plurality of power supply modules connected in parallel, the n switch modules are in one-to-one correspondence with the n power supply module arrays, and the n switch modules are in one-to-one correspondence with the n power supply module arrays. Each switch module is electrically connected with all the power modules in the corresponding power module array, all the switch modules are used for being electrically connected with power supply equipment, and each power module is used for being electrically connected with a corresponding load. According to the power supply control system provided by the embodiment of the invention, the plurality of power supply modules are arranged as the power supply module array and are connected with the switch module in series, so that block control is realized. Even if one or more power supply modules break down and need to be maintained, only the switch module connected with the power supply module array where the broken-down power supply module is located needs to be turned off, and normal operation of the whole display screen cannot be affected.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of LED all-in-one machine, and particularly relates to a power supply control system, an LED all-in-one machine and an electronic device. BACKGROUND

[0002] An LED (Light-Emitting Diode) all-in-one machine is a display screen formed by splicing multiple unit boxes, and each unit box is integrated with a power module, a receiving card, an LED lamp panel and the like. Since the LED all-in-one machine is formed by splicing multiple unit boxes, the power supply inputs of all power modules are connected in parallel. At the moment of power-on, these power modules will simultaneously charge all load capacitors, so that the LED all-in-one machine can display normally. However, if one or more power modules need to be repaired due to failure, it will affect the normal operation of the entire display screen. CONTENT OF THE UTILITY MODEL

[0003] The application provides a power supply control system, an LED all-in-one machine and an electronic device, which can solve the problem that the existing LED all-in-one machine will affect the normal operation of the entire display screen when one or more power modules need to be repaired due to failure.

[0004] In a first aspect, an embodiment of the application provides a power supply control system, which comprises n switch modules and n power module arrays, each power module array comprises multiple parallel power modules, n switch modules correspond to n power module arrays one by one, each switch module is electrically connected with all power modules in the corresponding power module array, all switch modules are used for being electrically connected with a power supply device, and each power module is used for being electrically connected with a corresponding load.

[0005] When the switch module is turned on, all power modules in the power module array corresponding to the switch module are turned on with the power supply device, and the power modules supply power to the corresponding load; wherein n is an integer, and n > 1.

[0006] In a possible implementation manner of the first aspect, when the on time of the mth switch module reaches a preset time, the m+1th switch module is turned on, wherein m is an integer, and 1≤m < n.

[0007] In a possible implementation manner of the first aspect, the preset time is greater than or equal to 100 milliseconds.

[0008] In a possible implementation manner of the first aspect, the switch module includes a relay, a first conduction end of the relay is configured to be electrically connected with the power supply device, a second conduction end of the relay is electrically connected with all the power supply modules in the corresponding power supply module array, a first end of a control coil of the relay is configured to receive a first control signal, and a second end of the control coil of the relay is configured to be electrically connected with a first power supply.

[0009] In a possible implementation manner of the first aspect, the switch module further includes a first switch tube, a gate of the first switch tube is configured to receive a second control signal, a drain of the first switch tube is electrically connected with the first end of the control coil of the relay, and a source of the first switch tube is grounded.

[0010] In a possible implementation manner of the first aspect, the switch module further includes a first diode, an anode of the first diode is electrically connected with the first end of the control coil of the relay, and a cathode of the first diode is electrically connected with the second end of the control coil of the relay.

[0011] In a possible implementation manner of the first aspect, all the power supply modules in each of the power supply module arrays are arranged in a straight line.

[0012] In a possible implementation manner of the first aspect, the power supply control system further includes a control module, the control module is electrically connected with all the switch modules, and the control module is configured to output a corresponding control signal to each of the switch modules.

[0013] In the second aspect, the embodiments of the present application provide an LED all-in-one machine, including the power supply control system in any one of the first aspect.

[0014] In the third aspect, the embodiments of the present application provide an electronic device, including the LED all-in-one machine in the second aspect.

[0015] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0016] The power supply control system provided by the embodiment of the present application comprises n switch modules and n power module arrays, and the power module array comprises a plurality of parallel power modules. The n switch modules correspond to the n power module arrays one by one, and each switch module is electrically connected with all the power modules in the corresponding power module array. When the switch module is turned on, all the power modules in the power module array connected with the switch module are connected with the power supply device and receive the voltage output by the power supply device to supply power to the corresponding load. Therefore, the power supply control system provided by the embodiment of the present application arranges a plurality of power modules as a power module array and connects a switch module in series. This design makes it possible to determine the connection between the power module and the power supply device by turning on and turning off the switch module, thereby realizing partition block control. Even if one or more power modules fail and need to be repaired, the switch module connected with the power module array where the failed power module is located can be turned off, and the normal operation of the entire display screen will not be affected. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a principle block diagram of the power supply control system provided by an embodiment of the present application;

[0019] Figure 2 is a circuit connection schematic diagram of the power supply control system provided by an embodiment of the present application;

[0020] Figure 3 is a circuit connection schematic diagram of the switch module provided by an embodiment of the present application;

[0021] Figure 4 is a principle block diagram of the power supply control system provided by another embodiment of the present application;

[0022] Figure 5 is a control timing diagram of the control module provided by an embodiment of the present application.

[0023] In the figure: 10, power supply control system; 101, switch module; 102, power module array; 1021, power module; 103, control module; 20, power supply device. DETAILED DESCRIPTION

[0024] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0025] It is to be understood that the terminology "includes", "has", "holds", "contains" and / or "comprising", "including", "having" and their conjugates, as used herein, means "including but not limited to", and not to the exclusion of any other term or aspect.

[0026] It is also to be understood that the terminology "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items, and that the term "at least one of A and B" is equivalent to "A, B, or A and B".

[0027] As used in the description of the application and the appended claims, the term "if' can be interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if it is determined" or "if [a described condition or event] is detected" can be interpreted to mean "upon determining" or "in response to determining" or "upon [the described condition or event] being detected" or "in response to [the described condition or event] being detected", depending on the context.

[0028] In addition, the terms "first", "second", "third", etc. as used in the description of the application and the appended claims are not used to denote or imply relative importance but are used to distinguish one element from another.

[0029] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "in other embodiments" or "in still other embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, unless otherwise specified. Furthermore, the terms "comprise", "comprises", "comprising", "include", "includes", "including" and the like are synonymous with the term "contain", "contains", "containing" or "has", "has", "having" and are used in the sense of "including but not limited to", unless otherwise specified.

[0030] Since the LED integrated machine is spliced by multiple unit boxes, all power supply modules of the LED integrated machine are connected in parallel. At the moment of power-on, the power supply modules simultaneously charge all load capacitors, so that the LED integrated machine can display normally. However, if one or more power supply modules need to be repaired, the normal operation of the entire display screen will be affected.

[0031] Based on the above problems, the power supply control system provided by the embodiment of the present application includes n switch modules and n power module arrays, and each power module array includes multiple parallel power supply modules. The n switch modules correspond to the n power module arrays one by one, each switch module is electrically connected to all power supply modules in the corresponding power module array. When the switch module is turned on, all power supply modules in the power module array connected to the switch module are connected to the power supply device and receive the voltage output by the power supply device to supply power to the corresponding load. Therefore, the power supply control system provided by the embodiment of the present application sets multiple power supply modules as a power module array and connects a switch module in series. This design makes it possible to determine the connection between the power supply module and the power supply device by turning on and turning off the switch module, thereby realizing partition block control. Even if one or more power supply modules need to be repaired, it is only necessary to turn off the switch module connected to the power module array where the faulty power supply module is located, which will not affect the normal operation of the entire display screen.

[0032] In order to illustrate the technical solutions described in the present application, the following will be described by specific embodiments.

[0033] Figure 1 The principle block diagram of the power supply control system 10 provided by an embodiment of the present application is shown. Referring to Figure 1 As shown, the power supply control system 10 includes n switch modules 101 and n power module arrays 102, each power module array 102 includes multiple parallel power supply modules 1021, the n switch modules 101 correspond to the n power module arrays 102 one by one, each switch module 101 is electrically connected to all power supply modules 1021 in the corresponding power module array 102, all switch modules 101 are used to be electrically connected to the power supply device 20, and each power supply module 1021 is used to be electrically connected to the corresponding load. Wherein, n is an integer, n>1.

[0034] Specifically, when the switch module 101 is turned on, all the power modules 1021 in the power module array 102 connected with the switch module 101 are connected with 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 the embodiment of the present application arranges multiple power modules 1021 as a power module array 102 and connects a switch module 101 in series. This design makes it possible to determine the connection between the power module 1021 and the power supply device 20 by turning on and off the switch module 101, thereby realizing the partition block control. Even if one or more power modules 1021 need to be repaired due to failure, it is only necessary to turn off the switch module 101 connected with the power module array 102 in which the failed power module 1021 is located, without affecting the normal operation of the entire display screen.

[0035] It should be noted that when the switch module 101 is turned on, the power module 1021 is connected with the power supply device 20, and the voltage output by the power supply device 20 is the grid alternating current. Figure 1 The first digit of the serial number of the power module 1021 in the power module array 102 represents the column number, and the second digit represents the row number, thereby forming a matrix arrangement.

[0036] It should be noted that when the switch module 101 is turned off, the power module 1021 and the power supply device 20 can be disconnected, the leakage and standby power of the power module 1021 is zero, which plays a role in energy saving and environmental protection, and can also prevent damage to the LED integrated machine caused by lightning in the power grid. In addition, by disconnecting the connection between the power module array 102 with a fault and the power supply device 20, the downtime and maintenance process can be reduced to reduce maintenance costs, while maintaining the continuous operation of the system. Moreover, during the maintenance process, the safety of the maintenance personnel can be ensured, and the danger that may occur due to the continuous power supply of the power module 1021 can be avoided.

[0037] Since the LED integrated machine is spliced by multiple unit boxes, the power supply input of all the 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 inrush current and leakage current, and easily cause the overcurrent protection switch and the leakage protection switch in the power grid to trip.

[0038] In order to solve the above problems, in an embodiment of the present application, the power supply control system 10 can also ensure that the (m+1)th switch module 101 is turned on when the on-time of the mth switch module 101 reaches the preset time. Wherein, m is an integer, 1≤m<n.

[0039] Specifically, the plurality of power modules are arranged as a power module array, and are controlled in a partitioned block and time sequence, and all load capacitors in each block are sequentially charged, so that the load capacitors corresponding to different blocks are not charged at the same time, that is, the time for each power module array to supply power to the load is different, so that the large inrush current and leakage current generated by the LED all-in-one machine at the power-on moment can be avoided, and the overcurrent protection switch and leakage protection switch in the power grid are prevented from triggering tripping.

[0040] It should be noted that, in order to achieve the purpose that the m+1th switch module 101 is turned on when the conduction time of the mth switch module 101 reaches the preset time, the time relay can be connected between adjacent switch modules 101, or a timer circuit or a flip-flop circuit can be used.

[0041] In an embodiment of the present application, the preset time is greater than or equal to 100 milliseconds.

[0042] Specifically, in general cases, the maintenance time of the inrush current and the impact leakage current is within tens of milliseconds, and therefore, the preset time is set to be greater than or equal to 100 milliseconds, so that the stacking of the inrush current and the leakage current can be effectively dispersed, the stable operation of the power grid and the load is ensured, and the damage of the equipment or the frequent misoperation of the protection device caused by the current impact is avoided.

[0043] It should be noted that the designer can adjust the preset time according to the actual situation of the inrush current and the leakage current and the actual demand of the equipment, and the present application is not limited in this regard.

[0044] In an embodiment of the present application, all power modules 1021 in each power module array 102 are arranged in a straight line.

[0045] 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 it more convenient to monitor and detect the state of the power module 1021, and the working state of the module can be quickly understood through visual inspection. In addition, this design is convenient for expansion. When it is necessary to increase the power module 1021, the expansion can be carried out along the column, and the layout of the power module 1021 in other columns will not be affected.

[0046] It should be noted that, as shown in Figure 2 , one power module 1021 is arranged in one unit box, and a plurality of unit boxes constitute an LED all-in-one machine.

[0047] In an embodiment of the present application, as shown in Figure 2As shown, the switch module 101 includes a relay, a first conduction end of the relay is used for electrical connection with the power supply device 20, a second conduction end of the relay is electrically connected with all power modules 1021 in the corresponding power module array 102, a first end of a control coil of the relay is used for receiving a first control signal, and a second end of the control coil of the relay is electrically connected with the first power supply DC_VDD.

[0048] Specifically, Figure 2 K1, K2, K3…Kn in the formula are all relays, and the relay is used as a switching device, and a normally open type relay can be selected. When the first end of the control coil of the relay receives the first control signal (such as a low-level signal), the control coil of the relay is powered on, at this time, the relay is closed, the first conduction end and the second conduction end of the relay are connected, the power module 1021 is connected with the power supply device 20, and the voltage output by the power supply device 20 is received to supply power to the load.

[0049] 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, so that the relay is closed.

[0050] It should be noted that other switching devices can be selected, such as using an optocoupler to replace the relay, the first end of the light-emitting diode of the optocoupler is connected with a 3.3V power supply, the second end of the light-emitting diode is grounded, the collector of the triode of the optocoupler is connected with the power supply device 20, and the emitter of the triode of the optocoupler is connected with all power modules 1021 in the corresponding power module array 102. Compared with the relay which needs to be powered and driven by 12V, the optocoupler which needs to be powered and driven by only 3.3V reduces the power supply voltage requirement of the system, reduces the power consumption, and simplifies the design of the circuit. Moreover, the relay belongs to a mechanical structure type switch, and needs to be attracted and released to realize the on-off of the circuit, while the optocoupler uses a solid-state semiconductor device, and is more sensitive and faster in response, without mechanical movement, and therefore has a significant advantage in high-speed switching applications.

[0051] In an embodiment of the present application, as shown in Figure 3 The switch module 101 further includes a first switch tube, a gate of the first switch tube is used for receiving a second control signal, a drain of the first switch tube is electrically connected with the first end of the control coil of the relay, and a source of the first switch tube is grounded.

[0052] Specifically, Figure 3Q1 to Qn in the formula (1) are all first switch tubes, which are used as switching devices and are turned on and turned off according to a second control signal. When the second control signal is a high-level signal, the first switch tube is turned on, that is, the drain and the source of the first switch tube are turned on. At this time, the first end of the control coil of the relay is pulled low, the control coil of the relay is powered, and the relay is closed. When the second control signal is a low-level signal, the first switch tube is turned off, that is, the drain and the source of the first switch tube are not turned on. At this time, no current passes through the control coil of the relay, and the relay is opened.

[0053] It should be noted that a triode or other field effect tube or the like switching device can be selected to replace the first switch tube, which is not limited here.

[0054] For example, the designer can select the type of the first switch tube according to the actual situation, that is, a metal oxide field effect transistor or an insulated gate bipolar transistor or the like all-controlled power device can be used. For example, the first switch tube can be selected as an NMOS tube. The first switch tube can also be selected as a PMOS tube, and the control signal output by the control module 103 can be adjusted accordingly.

[0055] In an embodiment of the present application, as shown in Figure 3 The switching module 101 further includes a first diode, an anode of the first diode being electrically connected to the first end of the control coil of the relay, and a cathode of the first diode being electrically connected to the second end of the control coil of the relay.

[0056] Specifically, Figure 3 D1 to Dn in the formula (1) are all first diodes, which are used as freewheeling diodes. When the control coil of the relay is powered off, due to the principle of electromagnetic induction, the control coil will generate an electromotive force opposite to the original voltage direction, which is called back electromotive force or self-induced electromotive force. This back electromotive force can be very high enough to damage the electronic components in the control circuit. By connecting a first diode in parallel across the control coil of the relay, a discharge circuit can be provided. When the back electromotive force is generated, the first diode is turned on, allowing current to flow through the first diode, thereby rapidly releasing the energy in the control coil and protecting the circuit components from damage.

[0057] For example, the first diode can be selected as a Schottky diode to quickly turn on and make the discharge speed of the control coil faster.

[0058] It should be noted that Figure 3The first end of the control coil of the relay in the switch module 101 shown in FIG. 1 can receive a first control signal (such as a high-level signal), the second end of the control coil of the relay is grounded, the cathode of the first diode is electrically connected with the first end of the control coil of the relay, and the anode of the first diode is electrically connected with the second end of the control coil of the relay. The working principle of the circuit designed in this way is similar to the above-mentioned working principle, and the above-mentioned technical effects can also be achieved, and excessive description is not made here.

[0059] It should be noted that if the above-mentioned relay is replaced by an optical coupler, since the optical coupler does not have a control coil inside, i.e. energy is not stored and released, it is not necessary to set the first diode for discharge, which simplifies the circuit design of the switch module 101 and reduces the design cost of the circuit.

[0060] In an embodiment of the present application, as shown in FIG. 1, Figure 3 or Figure 4 The power supply control system 10 further includes a control module 103, the control module 103 is electrically connected with all the switch modules 101, and the control module 103 is used to output corresponding control signals to each switch module 101.

[0061] Specifically, the control module 103 can output control signals to the switch module 101, so that the switch module 101 is turned on and turned off according to the control signals, thereby controlling the connection between the power module 1021 and the power supply equipment 20. Wherein, the control signal can be a step signal, that is, when the control signal is a low-level signal, the switch module 101 is turned on; when the control signal is a high-level signal, the switch module 101 is turned off.

[0062] It should be noted that when multiple loads are powered, the control module 103 is used to control the (m+1)th switch module 101 to be turned on when the (m)th switch module 101 is controlled to be turned on for a preset time. Therefore, the control module 103 is used to output corresponding control signals to each switch module 101 at a preset time interval in the present application. That is, the control module 103 is used for time sequence control, and all the load capacitors in each block are charged in turn, so that the load capacitors corresponding to different blocks are charged at different times, that is, the time for each power module array 102 to supply power to the load is different, so that the large inrush current and the leakage current generated by the LED all-in-one machine at the moment of power-on can be avoided, thereby avoiding the triggering trip of the overcurrent protection switch and the leakage protection switch in the power grid.

[0063] In an embodiment of the present application, as shown in FIG. 1, Figure 3 The control module 103 includes a control chip MCU, and the control chip MCU is electrically connected with all the switch modules 101.

[0064] Specifically, the control chip MCU is a programmable control chip, and a corresponding program can be set for the control chip MCU, so that time sequence control is realized on all the switch modules 101, thereby avoiding large inrush current and leakage of the LED all-in-one machine in the power-on moment.

[0065] It should be noted that, as shown in Figure 4 The first control signal output by the GPIO_1 pin of the control chip MCU is transmitted to the first switch module 101, when the time of the first control signal being at a high level reaches a preset time, the second control signal output by the GPIO_2 pin of the control chip MCU is a high level signal, and so on. The control chip MCU controls the output control signal in time sequence, and the delay of the high level signal output by the adjacent control pins from GPIO_1 to GPIO_n is greater than or equal to 100 milliseconds, so as to ensure that each relay is closed in time sequence.

[0066] The application further discloses an LED all-in-one machine comprising the power supply control system 10, and the LED all-in-one machine is controlled in time sequence and in block, so as to avoid large inrush current and leakage of the LED all-in-one machine in the power-on moment, thereby avoiding triggering of the overcurrent protection switch and the leakage protection switch in the power grid.

[0067] The application further discloses an electronic device comprising the LED all-in-one machine, and the electronic device can reduce the failure rate of the electronic device, prolong the service life of the electronic device, and improve the user experience.

[0068] Since the processing and functions realized by the LED all-in-one machine and the electronic device in the embodiment are basically corresponding to the embodiments, principles and examples of the foregoing power supply control system, the description of the embodiment is not described in detail, and the related description in the foregoing embodiments can be referred to, and will not be described here.

[0069] The foregoing embodiments are only used to illustrate the technical solutions of the application, rather than limit the same; although the application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in the protection scope of the application.

Claims

1. A power supply control system characterized by comprising: The power supply control system comprises n switch modules and n power module arrays, each of the power module arrays comprises a plurality of power modules in parallel, the n switch modules correspond to the n power module arrays one by one, each of the switch modules is electrically connected to all the power modules in the corresponding power module array, and all the switch modules are used to be electrically connected to a power supply device; each of the power modules is used to be electrically connected to a corresponding load. When the switch module is turned on, all the power modules in the corresponding power module array of the switch module are turned on with the power supply device, and the power modules supply power to the corresponding load; wherein n is an integer, and n > 1.

2. The power supply control system of claim 1, wherein When the on time of the mth switch module reaches a preset time, the m+1th switch module is turned on, wherein 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 switch module comprises a relay, a first conduction end of the relay is used to be electrically connected to the power supply device, a second conduction end of the relay is electrically connected to all the power modules in the corresponding power module array, a first end of a control coil of the relay is used to receive a first control signal, and a second end of the control coil of the relay is used to be electrically connected to a first power supply.

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

6. The power supply control system of claim 5, wherein, The switch module further comprises a first diode, an anode of the first diode is electrically connected to the first end of the control coil of the relay, and a cathode of the first diode is electrically connected to the second end of the control coil of the relay.

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

8. The power supply control system according to any one of claims 1 to 7, characterized by, The power supply control system further comprises a control module, the control module is electrically connected to all the switch modules, and the control module is used to output a corresponding control signal to each of the switch modules.

9. An LED all-in-one machine, characterized in that, The power supply control system comprises any one of claims 1-8.

10. An electronic device, comprising: The LED integrated machine comprises claim 9.

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