WO2022120706A1

WO2022120706A1 - Led display screen power supply system and led display screen

Info

Publication number: WO2022120706A1
Application number: PCT/CN2020/135231
Authority: WO
Inventors: 聂波涛
Original assignee: 深圳市艾比森光电股份有限公司
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2022-06-16

Abstract

Disclosed are an LED display screen power supply system and an LED display screen. The LED display screen power supply system comprises at least three LED display boxes, which are tiled in M rows and N columns, wherein M and N are both positive integers, and M ≥ 2 and N ≥ 2. Any one of the at least three LED display boxes is respectively electrically connected to adjacent LED display boxes, and at least two LED display boxes are respectively used for electrically connecting to a voltage source. In the LED display screen power supply system provided in the embodiments of the present application, each LED display box is electrically connected to all adjacent LED display boxes, and at least two LED display boxes are connected to a voltage source, such that redundant power supply for the LED display boxes is realized, and thus, even if some lines are faulty, power can still be supplied normally and continuously to the LED display boxes after the faulty lines, thereby ensuring the normal working of the LED display boxes after the faulty lines.

Description

LED display power supply system and LED display

technical field

The present application relates to the field of LED display technology, and in particular, to a power supply system for an LED display screen and an LED display screen.

Background technique

Light emitting diode (LED) display has the advantages of wide color gamut, high brightness, large viewing angle, low power consumption and long life, so in the field of display, LED display is widely used. For example, the more common securities trading and financial information display, airport flight dynamic information display, port and station passenger guidance information display, stadium information display, road traffic information display, power dispatching and vehicle dynamic tracking and other dispatching command center information display, shopping mall shopping Display of business publicity information and advertising media products in service areas such as centers.

Under normal circumstances, the LED display screen is formed by splicing multiple LED display cabinets, for example, four display cabinets are spliced into one LED display screen in two rows and two columns. When the spliced LED display works normally, it must be provided with voltage to make the LED display work normally. A complete LED display will provide one or more external power lines and 220V AC connections according to its power requirements. , the one or more external power supply lines are respectively electrically connected with one or more LED display boxes, and then all the display boxes included in the LED display screen are connected in series through internal wires in sequence.

In detail, when the power required by the LED display screen is small, a power supply line can be used. For example, the above-mentioned four display boxes are respectively the first display box, the second display box, the third display box and the fourth display box. cabinet, at this time the input port of the second display cabinet is connected to the output port of the first display cabinet, the input port of the third display cabinet is connected to the output port of the second display cabinet, and the input port of the fourth display cabinet is connected The port is connected to the output port of the third display box, and then only through the first display box and the 220V AC power supply, so as to supply power to the four display boxes in series. When the power required by the LED display is relatively large, multiple power lines can be used to power the entire LED display. For example, in four display boxes, the first display box and the second display box are connected in series, and the third display box is connected in series. The display box and the fourth display box are connected in series, and then the first display box and the third display box are respectively connected to 220V AC, so as to realize the two-way power supply of the four boxes, and meet the needs of high-power operation of the LED display.

However, in the above-mentioned power supply mode, when a power supply line is connected to a 220V voltage source, if the line between the first LED display box and the second LED display box fails, the first LED display box after the second LED display box is connected in series. The three LED display box and the fourth LED display box are not working properly. In the method of using two power supply lines, if the line between the first LED display box and the second LED display box is faulty, the second LED display box cannot work normally. That is, no matter whether one power supply line or two power supply lines are used, some of the lines are faulty, resulting in the problem that the LED display box connected in series behind the line cannot work normally.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a power supply system for an LED display screen and an LED display screen to solve the problem that the LED display box connected in series behind the faulty line cannot work normally after part of the line is faulty.

The application provides a power supply system for an LED display screen, comprising: at least three LED display cabinets spliced in M rows and N columns; wherein M and N are both positive integers, and M≥2, N≥2; at least three Among the LED display boxes, any one of the LED display boxes is respectively electrically connected with the adjacent LED display boxes, and at least two LED display boxes are respectively used for electrical connection with the voltage source.

Optionally, the at least two LED display boxes include two adjacent LED display boxes. Thereby, the complexity of the connection between the voltage source and the LED display can be simplified, the length of the connection line can be reduced, and the heating of the line can be reduced.

Optionally, the LED display box includes a box frame; an adapter plate is arranged on the box frame, and four connectors are arranged on the adapter plate; any LED display box is electrically connected to the adjacent LED display box respectively. The connection includes: any one LED display box is electrically connected to the adjacent LED display box through four connectors. Four connectors are arranged on the adapter board, so that the LED display box can be electrically connected to four other LED display boxes. No matter what position the LED display box is in, it can be smoothly connected to the adjacent LED display box. , to improve the flexibility and applicability of LED display cabinet splicing.

Optionally, the adapter plate is in a square shape, the adapter plate has a square surface, and the four connectors are respectively located in the middle of the four edges of the square surface. Set the adapter board to be square, and set the four connectors in the middle of the four edges of the square surface, so that any LED display box and each adjacent LED display box can be connected with the shortest line, reducing the The length of the line is reduced, the line layout is more regular, and the heat generation of the line can be reduced, thereby reducing power consumption and saving resources.

Optionally, the adapter board includes a printed circuit board. The cost of the printed circuit board is relatively low, so using the printed circuit board as an adapter board can facilitate operation and reduce costs.

Optionally, an external power supply interface is provided on the adapter board, and the external power supply interface includes an input terminal and an output terminal, and at least two LED display boxes are respectively used for electrical connection with the voltage source. It is electrically connected to the voltage source through respective external power supply interfaces, wherein at least two LED display boxes are electrically connected to their respective output terminals, and the input terminals are electrically connected to the voltage source. The 220V AC voltage source is connected to the LED display box through the external power supply interface, so as to supply power to the LED display box normally, so that the LED display box can work normally.

Optionally, a step-down conversion circuit is provided on the adapter board, and the electrical connection between at least two LED display boxes and their respective output terminals includes: at least two LED display boxes and their respective step-down conversion circuits are electrically connected, and the step-down The conversion circuit and the output terminal are electrically connected. The step-down conversion circuit is mainly used to convert the 220V voltage provided by the voltage source into a voltage between 3.8V and 5V, so that the voltage value can meet the working voltage requirements of the LED display box, so that the LED display box can work normally.

Optionally, the connector is provided with a first connection terminal, a second connection terminal and a third connection terminal; the first connection terminal is used for connection with the live wire, the second connection terminal is used for connection with the neutral wire, and the third connection terminal is used for and ground connection. Among them, the first connection terminal is connected to the live wire, the second connection terminal is connected to the neutral wire, and the LED display box can be powered normally, and the third connection terminal is connected to the ground wire to ensure electricity safety and reduce electricity consumption. accident rate.

Optionally, the number of the first connection terminal, the second connection terminal and the third connection terminal are all two. Therefore, after one of the terminals is damaged, another terminal can be connected to the corresponding line, thereby realizing redundant power supply, reducing the probability of power supply failure and improving the reliability of power supply.

A second aspect of the present application provides an LED display screen, including the LED display screen power supply system of any one of the first aspect of the present application.

The LED display screen power supply system provided by the embodiment of the present application includes: at least three LED display cabinets spliced in M rows and N columns; wherein M and N are both positive integers, and M≥2, N≥2. Among the at least three LED display boxes, any one of the LED display boxes is respectively electrically connected to the adjacent LED display boxes, and at least two LED display boxes are respectively used for electrical connection with the voltage source. In the power supply system for the LED display screen provided by the embodiment of the present application, each LED display box is electrically connected to all adjacent LED display boxes, and at least two LED display boxes are connected to a voltage source, so that the LED display box can be connected to a voltage source. The redundant power supply of the box body, so that even if part of the line fails, the LED display box body behind the faulty line can continue to supply power normally, thereby ensuring the normal operation of the LED display box body after the fault line.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the following briefly introduces the accompanying drawings that are required in the implementation manner.

1 is a schematic structural diagram of an LED display screen provided by an embodiment of the present application;

2 is a schematic diagram of a structure of a display module provided by an embodiment of the present application;

3 is a schematic structural diagram of a power supply system for an LED display screen provided by an embodiment of the present application;

4 is a schematic structural diagram of a power supply system for an LED display screen provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an adapter board provided by an embodiment of the present application.

Description of reference numbers:

LED display screen 100, LED display box 110, box frame 120, integrated circuit board 121, LED 122, adapter board 130, connector 140, first connection terminal 141, second connection terminal 142, third connection terminal 143, The external power supply interface 150 , the input terminal 151 , the output terminal 152 , the step-down conversion circuit 160 , the voltage source 200 , the first connection line 210 , the second connection line 220 , and the third connection line 230 .

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

The specific structure of the LED display screen 100 involved in the embodiments of the present application is described below. Generally, the LED display screen 100 is formed by splicing a plurality of LED display cabinets 110 . Each LED display box 110 includes a box frame 120 and a plurality of display modules, and the plurality of display modules are regularly fixed on the box frame 120 to form an LED display box 110.

Specifically, as shown in FIG. 1 , the LED display screen 100 may include four LED display cabinets 110 arranged in two rows and two columns. As shown in FIG. 2 , each LED display cabinet 110 includes a cabinet frame 120 and four display modules, the box frame 120 is fixed on the back of the display modules, and the four display modules are distributed in two rows and two columns. Each display module includes an integrated circuit board 121 and an LED 122 fixed on the front surface of the integrated circuit board 121 . Of course, those skilled in the art can understand that the number of LEDs 122 fixed on the integrated circuit board 121 is very large, especially the small-pitch LED display screen 100 has a large number of LEDs 122 . The LEDs 122 are generally divided into red LEDs, blue LEDs and green LEDs. For the LED display 100 that only needs to emit a single color, the LEDs 122 of one color can be arranged on the integrated circuit board 121. If the LED display screen 100 with different colors of light is used, the LEDs 122 of three colors of red LED, blue LED and green LED can be arranged on the integrated circuit board 121 .

Based on the LED display screen 100 with the above structure, the power supply system for the LED display screen provided by the embodiments of the present application will be described in detail below.

Referring to FIGS. 3 and 4 , the power supply system for an LED display screen provided by an embodiment of the present application includes: at least three LED display cabinets 110 spliced together in M rows and N columns; wherein M and N are both positive integers, and M ≥2, N≥2.

Among the at least three LED display boxes 110 , any one of the LED display boxes 110 is respectively electrically connected to the adjacent LED display boxes 110 , and at least two LED display boxes 110 are respectively used for electrical connection with the voltage source 200 .

Please refer to FIG. 3 , taking the LED display screen 100 including three LED display boxes 110 as an example for illustration, the three LED display boxes 110 are arranged in two rows and two columns, wherein two LED display boxes are distributed in the first row 110, an LED display box 110 is distributed in the second row. Among the three LED display boxes 110 , the LED display box 110 located in the first row and the first column is respectively connected with the LED display box 110 in the first row and the second column and the LED display box 110 in the second row and the first column. connect. In addition, the LED display box 110 located in the first row and the second column is connected to the voltage source 200 through the first connection line 210, and the LED display box 110 located in the second row and the first column is connected to the voltage source 200 through the second connection line 220. electrical connection. Therefore, even if the line between the LED display box 110 in the first row and the first column and the LED display box 110 in the first row and the second column is disconnected, the LED display box 110 in the first row and the first column is disconnected from the LED display box 110 in the first row and the second column. The LED display boxes 110 in the second row and the first column can also continue to supply power through the first connection line 210 , and the LED display box 110 in the second row and the first column can also continue to supply power through the second connection line 220 .

Referring to FIG. 4 , for example, the LED display screen 100 includes 25 LED display boxes 110 arranged in five rows and five columns. Each LED display box 110 is electrically connected to an adjacent LED display box 110 . Specifically, the LED display box 110 located at the corner is electrically connected to two adjacent LED display boxes 110 , the LED display box 110 located at the edge is electrically connected to the three adjacent LED display boxes 110 , and the LED display box 110 located in the middle is electrically connected. The LED display box 110 is electrically connected to the four adjacent LED display boxes 110 . In the 25 LED display box 110 , any two or three can be selected to be connected to the voltage source 200 respectively.

In detail, for example: the LED display boxes in the fifth row and the first column at the corner are respectively electrically connected with the LED display boxes 110 in the fourth row and the first column and the LED display boxes 110 in the fifth row and the second column; The LED display boxes in the first row and the third column at the edge are respectively connected with the LED display boxes 110 in the first row and the second column, the LED display boxes 110 in the first row and the fourth column, and the LED display boxes in the second row and the third column. The LED display boxes 110 are electrically connected; the LED display boxes 110 in the third row and the third column in the middle are respectively connected with the LED display boxes 110 in the third row and the second column, and the LED display boxes 110 in the third row and the fourth column. , The LED display box 110 in the second row and the third column is electrically connected to the LED display box 110 in the fourth row and the third column. Wherein, the LED display box 110 in the fifth row and the first column is electrically connected with the voltage source 200 through the first connecting wire 210; the LED display box 110 in the fifth row and second column is electrically connected with the voltage source 200 through the second connecting wire 220; The LED display box 110 in the fifth row and the third column is electrically connected to the voltage source 200 through the third connection line 230 . Thus, even if the line failure between the LED display box 110 in the third row and the second column and the LED display box 110 in the third row and the third column is faulty, the subsequent LED display box 110 in the fourth column and the fifth column display box 110 The LED display box 110 can continue to supply power through the third connection line 230 .

Therefore, using the LED display power supply system provided by the embodiment of the present application, no matter how many LED display boxes are included in the LED display screen, if some lines are faulty, the LED display boxes connected around and behind the faulty line will not be affected. Body 110 continues to supply power.

It can be seen from the above that in the power supply system for the LED display screen provided by the embodiment of the present application, each LED display box 110 is electrically connected to all adjacent LED display boxes 110, and there are at least two LED display boxes 110 and a voltage source 200 connection to realize redundant power supply to the LED display box 110, so that even if part of the line fails, the LED display box 110 after the faulty line can continue to supply power normally, thus ensuring that the LED display box after the faulty line can continue to supply power. 110 works fine.

In an optional embodiment, the at least two LED display boxes 110 include two adjacent LED display boxes 110 . Specifically, continue to take the LED display 100 including the LED display box 110 arranged in five rows and five columns as an example, in which the first connection line 210 , the second connection line 220 and the third connection line 230 can be set to supply power to the LED display screen 100 , wherein the first connection line 210 , the second connection line 220 and the third connection line 230 are connected with three adjacent LED display boxes 110 , as shown in FIG. 4 , the LED display in the fifth row and the first column The box 110 is electrically connected to the voltage source 200 through the first connection line 210 , the LED display box 110 in the fifth row and the second column is electrically connected with the voltage source 200 through the second connection line 220 , and the LED display box in the fifth row and the third column 110 is electrically connected to the voltage source 200 through the third connection line 230 . Therefore, the complexity of the connection between the voltage source 200 and the LED display screen 100 can be simplified, the length of the connection line can be reduced, and the heating of the line can be reduced.

In an optional embodiment, please refer to FIG. 5 , the LED display box 110 includes a box frame 120 ; an adapter plate 130 is arranged on the box frame 120 , and four connectors 140 are arranged on the adapter plate 130 . The electrical connection between any one of the LED display boxes 110 and the adjacent LED display boxes 110 respectively includes: any one of the LED display boxes 110 is electrically connected to the adjacent LED display boxes 110 through four connectors 140 . In general, the LED display cabinets 110 located at the edge may be adjacent to two or three LED display cabinets 110, but in the case of a large number of LED display cabinets 110, most of the LED display cabinets located in the middle 110 are adjacent to the four LED display boxes 110 . As shown in FIG. 4 , the LED display box 110 located at the corner position is electrically connected to the adjacent two LED display boxes 110 , and the LED display box 110 located at the edge is electrically connected to the adjacent three LED display boxes 110 . For connection, the LED display box 110 in the middle is electrically connected with the four adjacent LED display boxes 110 . Therefore, the four connectors 140 are provided on the adapter board 130, so that the LED display box 110 can be electrically connected with the four other LED display boxes 110, and no matter what position the LED display box 110 is in, the LED display box 110 can be connected smoothly and adjacently. The LED display box 110 is electrically connected, which improves the flexibility and applicability of the splicing of the LED display box 110 .

In an optional embodiment, the adapter plate 130 is square, the adapter plate 130 has a square surface, and the four connectors 140 are respectively located in the middle of the four edges of the square surface. Under normal circumstances, the LED display box 110 is mostly a square structure, then the adapter plate 130 is set to be square, and the four connectors 140 are respectively arranged in the middle of the four edges of the square surface, so that any LED display box can be made. 110 and each adjacent LED display box 110 are connected by the shortest line, thereby reducing the line length, making the line layout more regular, and reducing the heat generation of the line, thereby reducing power consumption and saving resources.

In an alternative embodiment, the interposer board 130 includes a printed circuit board. The adapter board 130 adopts a printed circuit board, and the four connectors 140 are integrated on the printed circuit board. Because the integrated circuit on the printed circuit board is relatively mature and the cost of the printed circuit board is relatively low, the printed circuit board is used. As the adapter plate 130, it can facilitate the operation and reduce the cost.

In an optional implementation manner, the adapter board 130 is provided with an external power supply interface 150 , and the external power supply interface 150 includes an input terminal 151 and an output terminal 152 . Wherein, the at least two LED display boxes 110 are respectively used for electrical connection with the voltage source 200 including: at least two LED display boxes 110 are respectively used for electrical connection with the voltage source 200 through respective external power supply interfaces 150, wherein at least two Each of the LED display boxes 110 is electrically connected to the respective output terminals 152 , and the input terminals 151 are electrically connected to the voltage source 200 . The external power supply interface 150 connects the 220V AC voltage source 200 to the LED display box 110 to supply power to the LED display box 110 normally, so that the LED display box 110 works normally.

In an optional embodiment, a step-down conversion circuit 160 is provided on the adapter board 130, and the electrical connection between the at least two LED display boxes 110 and the respective output terminals 152 includes: at least two LED display boxes 110 and the respective output terminals 152 are electrically connected. The step-down conversion circuit 160 is electrically connected, and the step-down conversion circuit 160 and the output terminal 152 are electrically connected. The step-down conversion circuit 160 is mainly used to convert the 220V voltage provided by the voltage source 200 into a voltage between 3.8V and 5V, so that the voltage value can meet the working voltage requirements of the LED display box 110 , so that the LED display box 110 normal work.

In this way, the 220V voltage provided by the voltage source 200 is firstly transmitted to the input terminal 151 of the external power supply interface 150, and then transmitted to the step-down conversion circuit 160 from the output terminal 152 of the external power supply interface 150, and the step-down conversion circuit 160 converts the 220V voltage After the voltage is 3.8V to 5V, it is supplied to the LED display box 110 .

In an optional embodiment, the connector 140 is provided with a first connection terminal 141 , a second connection terminal 142 and a third connection terminal 143 ; the first connection terminal 141 is used for connection with the live wire, and the second connection terminal 142 is used for It is connected with the neutral line, and the third connection terminal 143 is used for connection with the ground line. Wherein, after the first connection terminal 141 is connected to the live wire and the second connection terminal 142 is connected to the neutral wire, the LED display box 110 can be powered normally, and the third connection terminal 143 can be connected to the ground wire to ensure the safety of electricity consumption. Reduce the incidence of electricity accidents.

In an optional implementation manner, the number of the first connection terminals 141 , the second connection terminals 142 and the third connection terminals 143 is two. Therefore, after one of the terminals is damaged, another terminal can be connected to the corresponding line, thereby realizing redundant power supply, reducing the probability of power supply failure and improving the reliability of power supply.

In addition, the embodiments of the present application further provide an LED display screen 100, including the LED display screen power supply system provided by any embodiment of the present application.

The embodiments of the present application are described in detail above, and specific examples are used herein to illustrate the principles and implementations of the present application. The descriptions of the above embodiments can be used to help understand the methods and core ideas of the present application.

Claims

A power supply system for an LED display screen, characterized by comprising: at least three LED display cabinets spliced in M rows and N columns; wherein M and N are both positive integers, and M≥2, N≥2;

Among the at least three LED display boxes, any one of the LED display boxes is respectively electrically connected to the adjacent LED display boxes, and at least two LED display boxes are respectively used for electrical connection with the voltage source.
The power supply system for an LED display screen according to claim 1, wherein the at least two LED display boxes comprise two adjacent LED display boxes.
The power supply system for an LED display screen according to claim 1, wherein the LED display box body comprises a box body frame; an adapter plate is arranged on the box body frame, and four adapter plates are arranged on the adapter plate Connector;

The electrical connection between any one of the LED display boxes and the adjacent LED display boxes respectively includes: the any one of the LED display boxes is respectively electrically connected to the adjacent LED display boxes through the four connectors.
The power supply system for an LED display screen according to claim 3, wherein the adapter plate is in a square shape, the adapter plate has a square surface, and the four connectors are respectively located on four edges of the square surface the middle of.
The power supply system for an LED display screen according to claim 3, wherein the adapter board comprises a printed circuit board.
The LED display screen power supply system according to claim 3, wherein an external power supply interface is provided on the adapter board, and the external power supply interface includes an input terminal and an output terminal;

The at least two LED display boxes are respectively used to be electrically connected to the voltage source, including: the at least two LED display boxes are respectively used to be electrically connected to the voltage source through the respective external power supply interfaces, wherein the The at least two LED display boxes are electrically connected to the respective output terminals, and the input terminals are electrically connected to the voltage source.
The LED display screen power supply system according to claim 6, wherein a step-down conversion circuit is provided on the adapter board;

The electrical connection between the at least two LED display boxes and the respective output terminals includes: the at least two LED display boxes are electrically connected with the respective step-down conversion circuits, and the step-down conversion circuits and the respective step-down conversion circuits are electrically connected. The output terminals are electrically connected.
The power supply system for an LED display screen according to any one of claims 3 to 7, wherein the connector is provided with a first connection terminal, a second connection terminal and a third connection terminal; the first connection terminal It is used for connection with the live wire, the second connection terminal is used for connection with the neutral wire, and the third connection terminal is used for connection with the ground wire.
The power supply system for an LED display screen according to claim 8, wherein the number of the first connection terminal, the second connection terminal and the third connection terminal are all two.
An LED display screen is characterized by comprising the LED display screen power supply system according to any one of claims 1 to 9.