Double-loop multi-backup LED display box power supply circuit

Abstract

The invention discloses a double-loop multi-backup LED display box power supply circuit, which is characterized in that a power supply distribution module is electrically connected with each first connecting unit and each first one-way switch, each first connecting unit is connected with each display lamp panel in a one-to-one correspondence manner, each first one-way switch is connected in parallel, and a medium-voltage power supply module is electrically connected with commercial power. The alternating current of the mains supply is converted into medium-voltage direct current, the medium-voltage direct current is electrically connected with the power supply distribution module through the first one-way switch, medium-voltage power supply is provided, and a low-voltage power supply unit is arranged in the display lamp panel and used for converting the medium-voltage direct current into low-voltage large current and feeding the display lamp panel and the periphery. And a double-loop multi-backup circuit formed by a plurality of parallel medium-voltage power supply modules and a plurality of parallel low-voltage power supply units is configured, so that the copper consumption of used wires, the failure rate of equipment and the energy consumption are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of LED display cabinet power supply technology, and in particular to a dual-circuit, multi-backup LED display cabinet power supply circuit. Background Technology

[0002] LED display screens are typically powered by mains power. The power module inside the unit cabinet that makes up the screen converts the mains power into the low DC voltage required by the LED display panels to light up the LEDs. Since the power consumption of a single display cabinet is between 600 and 1000 watts, the low-voltage (4~5V) DC power distribution module of the AC to DC conversion module is usually between 80 and 200A. Due to the long feed circuit of the low-voltage (4~5V) high-current (80~200A) power supply to the display panels, there are large copper wire cross-sectional areas, high copper losses, large circuit voltage drops, and low efficiency. At the same time, the large current of the AC / DC low-voltage power conversion module directly causes the failure rate of the low-voltage power supply module to remain high. Summary of the Invention

[0003] The purpose of this invention is to address the power supply technology problems existing in LED display cabinets in the background art by proposing a dual-circuit, multi-backup LED display cabinet power supply circuit.

[0004] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows: A dual-circuit, multi-backup LED display cabinet power supply circuit includes a power distribution module, multiple medium-voltage power supply modules, and multiple display lamp boards. The power distribution module has a built-in display data unit, multiple first connection units, and multiple first one-way switches. The display data units are electrically connected to each first connection unit and each first one-way switch. Each first connection unit is electrically connected to each display lamp board in a corresponding manner. The first one-way switches are connected in parallel. The medium-voltage power supply module is electrically connected to the mains power supply, converting the AC power of the mains power into medium-voltage DC power, and is electrically connected to the power distribution module through the first one-way switches to provide medium-voltage power supply. The display lamp boards have a built-in low-voltage power supply unit and a second connection unit, which is electrically connected to the first connection unit through the second connection unit. The display lamp boards are electrically connected to the display data unit. The low-voltage power supply unit is used to convert the medium-voltage DC power into low-voltage high current and can supply power to the display lamp boards and surrounding components.

[0005] Preferably, the medium-voltage power supply module includes an AC / DC switching power supply.

[0006] Preferably, the first unidirectional switch is connected to the power supply terminal and the ground terminal of the AC / DC switching power supply, respectively, and each first connection unit is electrically connected to the power supply terminal and the ground terminal of each first unidirectional switch, so as to form a power supply circuit in which each first connection unit is connected in parallel.

[0007] Preferably, the low-voltage power supply unit includes a low-voltage DC / DC power supply and a second unidirectional connection unit. The second connection unit is connected in series with the second unidirectional connection unit and is electrically connected to the low-voltage terminal and the ground terminal of the low-voltage DC / DC power supply. The second connection unit is connected to the power supply terminal of the low-voltage DC / DC power supply. The low-voltage power supply unit is used to convert the medium-voltage DC power transmitted by the first unidirectional switch and the second unidirectional connection unit through the power supply terminal into low-voltage DC power, and output low-voltage DC power to the second unidirectional connection unit through the low-voltage DC terminal to form a low-voltage DC power supply circuit.

[0008] Preferably, the low-voltage terminals of each first connection unit and the low-voltage terminals of the display data unit are connected.

[0009] Preferably, a low-voltage DC / DC power supply is placed at the center of the display panel, and supplies power evenly to the surrounding area from within the display panel with a low voltage and high current.

[0010] Compared with the prior art, the present invention has the following beneficial technical effects: it includes a power distribution module, multiple medium-voltage power supply modules, and multiple display panels. The power distribution module has a built-in display data unit, multiple first connection units, and multiple first one-way switches. The display data units are electrically connected to each first connection unit and each first one-way switch, and each first connection unit is electrically connected to each display panel in a corresponding manner. The first one-way switches are connected in parallel. The medium-voltage power supply module is electrically connected to the mains power, converting the AC power of the mains power into medium-voltage DC power, and is electrically connected to the power distribution module through the first one-way switches to supply medium-voltage power. The display panels have a built-in low-voltage power supply unit, which can provide low-voltage power to the display panels and the power distribution module, realizing a secondary voltage conversion from mains power to medium voltage and from medium voltage to low voltage. It also has a dual-loop multi-backup circuit formed by multiple parallel medium-voltage power supply modules, multiple parallel low-voltage power supply units, and one-way power supply circuits, which effectively reduces copper consumption of wiring, power supply failure rate, and energy consumption. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the power supply circuit in the embodiments provided by the present invention; Figure 2 This is a schematic diagram of the power supply structure of the display lamp board in the embodiments provided by the present invention; Figure 3 This is a schematic diagram of the circuit structure of the second unidirectional connection unit in the embodiment provided by the present invention; Figure 4 This is a schematic diagram of the circuit structure of the low-voltage DC / DC power supply in the low-voltage power supply unit provided in the embodiments of the present invention.

[0012] Icon labels: 100 Power distribution module, 101 Display data unit, 102 First connection unit, 103 First one-way switch; 200 medium-voltage power supply module; 300 Display panel, 301 Low-voltage power supply unit, 302 Second unidirectional connection unit, 303 Second connection unit. Detailed Implementation

[0013] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0014] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or assembly referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0015] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a link, or a specific connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two groups. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] like Figures 1-4As shown, this invention proposes a dual-circuit, multi-backup LED display cabinet power supply circuit, including a power distribution module 100, multiple medium-voltage power supply modules 200, and multiple display lamp panels 300. The power distribution module 100 has a built-in display data unit 101, multiple first connection units 102, and multiple first one-way switches 103. The display data unit 101 is electrically connected to each of the first connection units 102 and each of the first one-way switches 103. Each of the first connection units 102 is electrically connected to each of the display lamp panels 300 in a one-to-one correspondence. Each of the first one-way switches 103 is connected in parallel with each other. The medium-voltage power supply module 200 is electrically connected to the mains power, converting the AC power of the mains power into medium-voltage DC power, and is electrically connected to the power distribution module 100 through the first one-way switches 103 to provide medium-voltage power supply. It should be noted that the medium-voltage power supply module 200 converts AC mains power (110V~220V) into medium-voltage DC power (24V~36V). The medium-voltage power supply module 200 is provided with output terminals, and the wiring harness connected to the output terminals is connected to the terminals of the power distribution module 100. The power distribution module 100 is connected to the terminals of the output wiring harness of the medium-voltage power supply module 200. The power distribution module 100 is connected to the medium-voltage power supply module 200 in series with a first one-way switch 103. The first one-way switch 103 can only supply power in one direction in the forward direction to block other medium-voltage power supply modules 200 from supplying power in reverse to the current medium-voltage power supply module 200. The display panel 300 has a built-in low-voltage power supply unit 301 and a second connection unit 303. The second connection unit 303 is electrically connected to the first connection unit 102. The display panel 300 is electrically connected to the display data unit 101. The low-voltage power supply unit 301 is used to convert medium-voltage DC power into low-voltage high current and can supply power to the display panel 300 and its surroundings.

[0018] Multiple medium-voltage power supply modules 200 are provided, and in this embodiment there are two or more. The output harness of each medium-voltage power supply module 200 first passes through its respective series-connected first unidirectional switch 103 from the power supply line of the connection terminal, and then realizes the parallel connection of the power supply circuit on the power distribution module 100. The parallel lines are respectively connected to each display light board 300 to achieve medium-voltage power supply to the low-voltage DC power conversion module of each display light board 300.

[0019] It should be emphasized that each medium-voltage power supply module 200 is connected in parallel to supply power through its respective first one-way switch 103. Therefore, when one of the medium-voltage power supply modules 200 fails, the other medium-voltage power supply modules 200 connected in parallel can still continue to provide medium-voltage power supply from the low-voltage DC power conversion module to each display panel 300. Furthermore, due to the one-way forward power supply of the first one-way switch 103, the other medium-voltage power supply modules 200 connected in parallel will not provide reverse power to the medium-voltage power supply module 200 that is in a failed state. This forms a backup power supply with the same value as the medium-voltage DC power conversion module in the medium-voltage DC power supply circuit.

[0020] The low-voltage power supply unit 301 can provide low-voltage power to the display light panel 300 and the power distribution module 100; It uses the low-voltage power supply unit 301 to step down and convert the medium-voltage DC power to output a low-voltage, high-current DC voltage to the display lamp board 300, and feeds power to the periphery of the module 300 from the center of the display lamp board 300, so as to achieve the shortest line and balanced power supply effect for high current feeding within the display lamp board 300.

[0021] Since the first connection unit 102 is connected to the corresponding display panel 300, the line feeds low-voltage DC voltage back to the power distribution module 100 through the first connection unit 102. Since each display panel 300 is connected to the power distribution module 100 in parallel, when the low-voltage power supply unit 301 of one display panel 300 fails, the low-voltage power supply units 301 of the other display panels 300 can supply power to the failed display panel 300 through the power distribution module 100, so as to achieve the effect of low-voltage multiple backup. The low-voltage power supplies of the parallel display panels 300 form a low-voltage circuit, and the number of power backups in the circuit is equal to the number of parallel display panels 300.

[0022] In one embodiment of this application, the medium-voltage power supply module 200 includes an AC / DC switching power supply, specifically an AC: 110~240V / DC: 24V 15A AC-DC converter module, and the number of medium-voltage power supply modules 200 is set to two or more. In this embodiment, two medium-voltage power supply modules 200 are shown as an example.

[0023] In one embodiment of this application, the first one-way switch 103 is connected to the power supply terminal and the ground terminal of the AC / DC switching power supply, respectively, and each first connection unit 102 is electrically connected to the power supply terminal and the ground terminal of each first one-way switch 103, so as to form a power supply circuit in which each first connection unit 102 is connected in parallel.

[0024] It should be noted that the AC / DC switching power supply outputs 24V and is electrically connected to the first unidirectional switch 103. The first unidirectional switch 103 outputs 24V DC medium voltage to the power distribution module 100. Since the first unidirectional switch 103 is a unidirectional switch, it can only supply power in one direction in the forward direction, thereby blocking other high voltage reverse power supply to the medium voltage power supply module 200, ensuring the logic of this circuit is self-consistent, and ensuring the normal operation of the protection circuit.

[0025] In one embodiment of this application, the display panel 300 further includes a second connection unit 303, and the low-voltage power supply unit 301 is electrically connected to the first connection unit 102 through the second connection unit 303.

[0026] It should be noted that the second connection unit 303 is structurally compatible with the first connection unit 102, specifically as a male connector and a female connector. Both include a low-voltage terminal, a power supply terminal, and a ground terminal. The power supply terminal receives a 24V medium-voltage current from the first unidirectional switch 102, which is then transmitted by the second connection unit 303 to the low-voltage power supply unit 301. The low-voltage power supply unit 301 performs medium-voltage to low-voltage conversion to obtain a 5V low-voltage current. This 5V low-voltage current is then transmitted by the low-voltage power supply unit 301 to the first connection unit 102 via the second connection unit 303. The low-voltage side of Yuan 102 is fed back to the power distribution module 100. It should be noted that the low-voltage feedback here is not only fed back to the power distribution module 100, but also to the currently parallel display lamp board 300, providing low-voltage power supply to the built-in LED display module of the currently parallel display lamp board 300. This realizes the secondary conversion step-down dual-circuit power supply technology (mains power to medium voltage, medium voltage to low voltage), and mutual backup circuits are set in the dual power supply circuits to achieve the effects of less copper consumption, energy saving, and low backup power supply failure, thereby improving the display screen quality and reducing energy consumption and copper resource consumption.

[0027] In one embodiment of this application, the low-voltage power supply unit 301 includes a low-voltage DC / DC power supply and a second unidirectional connection unit 302. The second connection unit is connected in series with the second unidirectional connection unit 302 and is electrically connected to the low-voltage terminal and the ground terminal of the low-voltage DC / DC power supply. The second connection unit is connected to the power supply terminal of the low-voltage DC / DC power supply. The low-voltage power supply unit 301 is used to convert the medium-voltage DC power transmitted by the first unidirectional switch and the second unidirectional connection unit through the power supply terminal into low-voltage DC power, and output low-voltage DC power to the second unidirectional connection unit 302 through the low-voltage terminal.

[0028] In one embodiment of this application, the low-voltage terminals of each first connection unit 102 and the low-voltage terminals of the display data unit 101 are connected.

[0029] It should be noted that the structure of the second unidirectional connection unit 302 and the structure of the first unidirectional switch 103 can use the same components, but are not limited to the same components. The structure can be determined according to actual user needs or R&D costs. For example, when the low-voltage DC / DC power supply receives a 24V medium-voltage current from the second connection unit 302, it steps down and converts it to a 3~5V low-voltage current. Taking 5V as an example, the low-voltage DC / DC power supply transmits this 5V low-voltage current to the second unidirectional connection unit 302 and then back to the power distribution module 100. It should be noted that the low-voltage power supply unit 301 is located at the center of the display light board 300 to minimize the voltage loss of low-voltage wiring. The power supply is optimized and balanced from the center of the display light board 300 to the surrounding areas, achieving the dual effects of high power efficiency and uniform display.

[0030] Since each display panel 300 is connected in parallel with respect to the power distribution module 100, when the low-voltage power supply unit 301 of one of the display panels 300 fails, the low-voltage power supply units 301 of the other display panels 300 connected in parallel on the power distribution module 100 provide low-voltage power to the LED display module of the failed display panel 300, thereby achieving a low-voltage multiple backup effect; the parallel low-voltage power supply units 301 form a low-voltage circuit, and the parallel low-voltage power supply units 301 also supply power to the power distribution module 100 and the display data unit 101 therein.

[0031] A low-voltage DC / DC power supply is placed at the center of the display panel and supplies power evenly to the surrounding area from within the display panel with a low voltage and high current.

[0032] It should be noted that the above descriptions are one or more embodiments provided in conjunction with specific content, and do not imply that the specific implementation of the present invention is limited to these descriptions. Any methods or structures that are similar to or identical to those of the present invention, or any technical deductions or substitutions made based on the concept of the present invention, should be considered within the scope of protection of the present invention.

Claims

1. A dual-circuit, multi-backup LED display cabinet power supply circuit, characterized in that, Includes a power distribution module, multiple medium-voltage power supply modules, and multiple indicator light panels; The power distribution module has a built-in display data unit, multiple first connection units and multiple first one-way switches. The display data unit is electrically connected to each of the first connection units and each of the first one-way switches. Each of the first connection units is electrically connected to each of the display lamp panels. The first one-way switches are connected in parallel with each other. The medium-voltage power supply module is electrically connected to the mains power supply, converting the AC power of the mains power into medium-voltage DC power, and is electrically connected to the power distribution module through the first one-way switch to provide medium-voltage power supply; The display panel has a built-in low-voltage power supply unit and a second connection unit. The second connection unit is electrically connected to the first connection unit. The display panel is electrically connected to the display data unit. The low-voltage power supply unit is used to convert the medium-voltage DC power into low-voltage high current and can supply power to the display panel and its surroundings.

2. The dual-circuit multi-backup LED display cabinet power supply circuit according to claim 1, characterized in that, The medium-voltage power supply module includes an AC / DC switching power supply.

3. The dual-circuit multi-backup LED display cabinet power supply circuit according to claim 2, characterized in that, The first one-way switch is connected to the power supply terminal and the ground terminal of the AC / DC switching power supply, respectively. Each of the first connection units is electrically connected to the power supply terminal and the ground terminal of each of the first one-way switches, so as to form a power supply circuit in parallel for each of the first connection units.

4. The dual-circuit multi-backup LED display cabinet power supply circuit according to claim 3, characterized in that, The low-voltage power supply unit includes a low-voltage DC / DC power supply and a second unidirectional connection unit. The second connection unit is connected in series with the second unidirectional connection unit and electrically connected to the low-voltage terminal and ground terminal of the low-voltage DC / DC power supply. The second connection unit is connected to the power supply terminal of the low-voltage DC / DC power supply. The low-voltage power supply unit is used to convert the medium-voltage DC power transmitted by the first unidirectional switch and the second unidirectional connection unit through the power supply terminal into low-voltage DC power, and output low-voltage DC power to the second unidirectional connection unit through the low-voltage terminal to form a low-voltage DC power supply circuit.

5. The dual-circuit multi-backup LED display cabinet power supply circuit according to claim 4, characterized in that, The low-voltage terminals of each of the first connection units are connected to the low-voltage terminals of the display data units.

6. The dual-circuit multi-backup LED display cabinet power supply circuit according to claim 4, characterized in that, The low-voltage DC / DC power supply is located at the center of the display panel and supplies power evenly to the surrounding area within the display panel with low voltage and high current.

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