LED display screen

Abstract

The embodiment of the utility model provides an LED display screen. The LED display screen comprises a controller and at least two LED lamp panels. Each LED lamp panel comprises a plurality of LED lamp strings; an LED lamp panel in the LED display screen adopts a series-parallel hybrid power supply mode; wherein the power consumption of the LED display screen can be reduced in the series-parallel hybrid power supply mode, and the problem that subsequent LED lamp beads are all powered off due to the fact that a certain LED lamp bead in the LED lamp panel breaks down can be solved through the series-parallel hybrid power supply mode, and the display performance of the whole LED display screen is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an LED display screen. BACKGROUND

[0002] With the rapid development of science and technology, LED (Light Emitting Diode) technology has been widely used in lighting, display and other fields due to its high energy efficiency, long service life and environmental protection characteristics. Especially in the field of display technology, LED display screen has become the first choice for indoor and outdoor advertising, stage background, information display and other applications due to its excellent display effect and flexibility.

[0003] In the field of LED display technology, LED light bar screen is a common LED display screen, which usually includes a controller and a plurality of LED light strings, each LED light string including a plurality of LED beads. On the one hand, the controller is responsible for display control of the LED beads in the plurality of LED light strings, i.e. providing a data signal for each LED light string, the data signal being transmitted from the first LED bead in the LED light string to the subsequent LED beads, so that each LED bead displays the corresponding data.

[0004] On the other hand, the controller also controls the power supply of the LED beads in the plurality of LED light strings, usually using a stable voltage power supply method to supply power to the plurality of LED beads in the same LED light string in parallel, so as to reduce the mutual influence between the LED beads. In the parallel power supply method, in order to ensure the safety of the LED beads, a current limiting resistor needs to be configured for each LED bead to limit the current, and these resistors will generate heat and consume energy, especially as the number of LED beads increases, the energy consumption will also increase. Invention content

[0005] The present application provides an LED display screen, which supports diversified power supply methods to reduce the power consumption of the LED screen.

[0006] The present application provides an LED display screen, which includes a controller and at least two LED light panels; each LED light panel includes a plurality of LED light strings; each LED light string includes a plurality of LED beads, each LED bead is provided with a power input port and a power output port, and an LED driving chip and an LED light emitting unit are packaged inside the LED bead; the controller is electrically connected with the power input port of the first LED bead and the power output port of the tail LED bead in each LED light string, and is used to provide a power signal for the LED beads.

[0007] The power input port and the power output port of each LED bead are respectively electrically connected with the power input pin and the power output pin of the internal LED driving chip, so as to provide a power signal for the LED light emitting unit through the LED driving chip;

[0008] In each LED lamp panel, the power input ports of adjacent LED lamp beads in each LED lamp string are electrically connected with the power output ports to form a serial power supply circuit, and the serial power supply circuits between adjacent LED lamp strings are connected in parallel to form a parallel power supply circuit.

[0009] In an optional embodiment, in the LED lamp panel, the LED lamp beads in the plurality of LED lamp strings are arranged in a row-column manner, the LED lamp beads in the same LED lamp string are located in the same column, the LED lamp beads at the same positions in different LED lamp strings are located in the same row, and the serial power supply circuits between adjacent two rows of LED lamp beads are connected in parallel to form a parallel power supply circuit.

[0010] Alternatively,

[0011] In the LED lamp panel, the LED lamp beads in the plurality of LED lamp strings are arranged in a row-column manner, the LED lamp beads in the same LED lamp string are located in the same row, the LED lamp beads at the same positions in different LED lamp strings are located in the same column, and the serial power supply circuits between adjacent two columns of LED lamp beads are connected in parallel to form a parallel power supply circuit.

[0012] In an optional embodiment, in the LED lamp panel, each LED lamp bead further comprises a power gating circuit arranged between the power input port and the power input pin; the power gating circuit is configured to: when detecting that there is a power signal on both the serial power supply circuit and the parallel power supply circuit, connect the serial power supply circuit with the power input pin; or when detecting that there is a power signal on one of the serial power supply circuit and the parallel power supply circuit and no power signal on the other one, connect the power supply circuit with the power input pin on which there is a power signal.

[0013] In an optional embodiment, in any LED lamp panel, the controller is electrically connected with the plurality of LED lamp strings through a plurality of communication ports, for providing data signals to the plurality of LED lamp strings; wherein each LED lamp bead is further provided with a first signal input port and a first signal output port, a second signal input port and a second signal output port.

[0014] The first signal input port, the second signal input port, the first signal output port and the second signal output port of each LED lamp bead are electrically connected with a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin of an internal LED driving chip, so as to transmit data signals to the LED light emitting unit through any signal input pin of the LED driving chip.

[0015] The first signal output port and the second signal output port of adjacent LED lamp beads in the same LED lamp string are electrically connected with the first signal input port and the second signal input port respectively to form a serial signal line; and the first signal input port of each LED lamp bead is directly electrically connected with the second signal output port to form a first breakpoint continuation line.

[0016] In an optional embodiment, the second signal output port of a first LED lamp bead and the second signal input port of a second LED lamp bead in any LED lamp string are electrically connected to form a second breakpoint continuation line; wherein the first LED lamp bead is any LED lamp bead on the any LED lamp string, and the second LED lamp bead is spaced apart from the first LED lamp bead by at least two LED lamp beads.

[0017] In an optional embodiment, the first LED lamp bead and the second LED lamp bead form a lamp bead group, and one or more lamp bead groups exist on the any LED lamp string, and different lamp bead groups have different first LED lamp beads and second LED lamp beads.

[0018] In an optional embodiment, in adjacent two lamp bead groups, the first LED lamp bead in the latter lamp bead group is the second LED lamp bead in the former lamp bead group or the LED lamp bead behind the second LED lamp bead; or, in adjacent two lamp bead groups, the first LED lamp bead in the latter lamp bead group is the LED lamp bead in front of the second LED lamp bead in the former lamp bead group.

[0019] In an optional embodiment, the LED driving chip comprises a monitoring circuit electrically connected with the first signal input pin and the second signal input pin, an analysis circuit electrically connected with the monitoring circuit, and a driving circuit electrically connected with the analysis circuit; wherein the monitoring circuit outputs the data signal and the pin identification of the any signal input pin to the analysis circuit in the case that the any signal input pin receives the data signal; the analysis circuit analyzes the data segment corresponding to the LED light unit from the data signal according to the analysis mode corresponding to the pin identification, and outputs the data segment to the driving circuit; the driving circuit performs display control on the LED light unit according to the data segment; wherein different signal pins correspond to different analysis modes.

[0020] In an optional embodiment, the signal flow directions of the at least two LED lamp plates are the same, or the signal flow directions of at least part of adjacent LED lamp plates in the at least two LED lamp plates are opposite; the signal flow direction at least includes the flow direction of the power supply signal.

[0021] In an optional embodiment, the controller is arranged at the bottom and / or top of the LED display screen.

[0022] In the embodiment of the present application, an LED display screen is provided, and the LED lamp panel in the LED display screen adopts a serial-parallel hybrid power supply mode; in which, the power consumption of the LED display screen can be reduced in the serial-parallel hybrid power supply mode, and the serial-parallel hybrid power supply mode can also solve the problem that the subsequent LED lamp beads are all powered off due to the failure of a certain LED lamp bead in part of the LED lamp panel, and improve the display performance of the entire LED display screen. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the present application and constitute a part of this application, illustrate certain illustrative embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0024] Fig. 1a A structural schematic diagram of an LED display screen is provided for the illustrative embodiment of the present application;

[0025] Fig. 1b A structural schematic diagram of another LED display screen is provided for the illustrative embodiment of the present application;

[0026] Fig. 1c A structural schematic diagram of still another LED display screen is provided for the illustrative embodiment of the present application;

[0027] Fig. 2a A structural schematic diagram of a serially powered LED lamp panel is provided for the illustrative embodiment of the present application;

[0028] Fig. 2b A structural schematic diagram of a serial-parallel powered LED lamp panel is provided for the illustrative embodiment of the present application;

[0029] Fig. 3a A structural schematic diagram of an LED lamp bead is provided for the illustrative embodiment of the present application;

[0030] Fig. 3b A structural schematic diagram of another LED lamp bead is provided for the illustrative embodiment of the present application;

[0031] Fig. 4a A structural schematic diagram of an LED lamp string is provided for the illustrative embodiment of the present application;

[0032] Fig. 4b A structural schematic diagram of another LED lamp string is provided for the illustrative embodiment of the present application;

[0033] Fig. 4c A structural schematic diagram of still another LED lamp string is provided for the illustrative embodiment of the present application;

[0034] Fig. 4dYet another LED lamp string structure diagram is provided for the exemplary embodiments of the present application. DETAILED DESCRIPTION

[0035] For the purpose of making the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] The embodiments of the present application provide an LED display screen, as shown in Figs. 1a-1c , which comprises a controller and at least two LED lamp panels; the at least two LED lamp panels are spliced together in sequence to form the LED display screen. The embodiments of the present application do not limit the number of LED lamp panels included in the LED display screen, which can be 2, 3, 4, 5, or 10, 30, etc., and the specific number can be determined according to the application scenario and the size of the display space. For example, three LED lamp panels D, E and F are shown in Fig. 1a ; three LED lamp panels G, H and I are shown in Fig. 1b ; and three LED lamp panels J, K and L are shown in Fig. 1c . In addition, the LED lamp panels included in the LED display screen can be the same LED lamp panel or different LED lamp panels. The same here refers to the same structure, type, size and power supply mode of the LED lamp panel; and the different LED lamp panel refers to at least one of the structure, type, size and power supply mode of the LED lamp panel being different. Such flexibility allows the LED display screen to use the same or different LED lamp panels to meet different display requirements or application scenarios. Optionally, the same LED lamp panel is used in the LED display screen shown in Figs. 1a-1c . Figs. 1a-1c The difference between the LED display screens shown in Figs. 1a-1c lies in the different setting positions of the controller and the signal flow direction, and the specific description can be referred to in the subsequent embodiments. The same parts of the LED display screen shown in will be introduced first.

[0037] As shown in Fig. 2a and Fig. 2b , each LED lamp panel comprises a plurality of LED lamp strings. The number of lamp strings included in each LED lamp panel is not limited, which can be 2, 5, 6, 10, 20, 30, etc., and can also be more or less, and the specific number can be determined according to the application scenario and the size of the display space. For example, three LED lamp strings are shown in Figs. 1a-1c , and Fig. 2a and Fig. 2bThe LED lamp panel in each of the LED lamp boards includes 4 LED light strings, but is not limited thereto. Among them, Fig. 2a The LED lamp panel in each of the LED lamp boards includes 4 LED light strings, but is not limited thereto. Among them, Fig. 2a The LED lamp panel in each of the LED lamp boards includes 4 LED light strings, but is not limited thereto. Among them, Fig. 2b The LED lamp panel in each of the LED lamp boards includes 4 LED light strings, but is not limited thereto. Among them,

[0038] Further, as shown in Fig. 2a and Fig. 2b , each LED light string in each LED lamp board includes a plurality of LED lamp beads 100, each LED lamp bead 100 being provided with a power input port Vin and a power output port Vout. Further, as shown in Fig. 3a and Fig. 3b , an LED driving chip 10 and an LED light-emitting unit 20 are encapsulated inside each LED lamp bead 100. The controller is electrically connected to the power input port Vin of the first LED lamp bead 100 and the power output port Vout of the tail LED lamp bead in each LED light string, for providing a power supply signal by the LED lamp bead. Further, as shown in Fig. 1a , Fig. 1b , Fig. 1c , Fig. 2a and Fig. 2b , each LED lamp board includes a power supply end VCC and a ground end GND, and the power supply signal can be provided by the controller. The controller can be electrically connected to the power supply end VCC and the ground end GND to provide a power supply signal for the LED light strings in the LED lamp board. Further, the controller can be directly electrically connected to the power supply end and the ground end, or can be electrically connected to the power supply end and the ground end through a connector or other intermediate circuit, without limitation. Among them, the power input ports Vin of the first LED lamp beads 100 of the plurality of LED light strings in each LED lamp board are connected in parallel to the power supply end VCC, i.e., all the LED light strings directly receive power supply from the power supply end VCC. Similarly, the power output ports Vout of the tail LED lamp beads 100 of the plurality of LED light strings in each LED lamp board are connected in parallel to the ground end GND, to ensure that the ends of all the LED light strings can be correctly grounded. By being connected in parallel to the power supply end and the ground end, each LED light string can obtain stable power supply, and the serial power supply line ensures the continuity of the power supply signal in the entire LED light string.

[0039] As shown in Fig. 3bAs shown, each LED lamp bead 100 is provided with a power input port Vin and a power output port Vout, which are electrically connected with the power input pin V1 and the power output pin V2 of the LED driving chip inside the LED lamp bead 100. This connection mode ensures that the LED driving chip can receive the power signal from the power input port Vin and transmit it to the LED light-emitting unit to provide the power signal for the LED light-emitting unit through the LED driving chip, thereby driving the LED light-emitting unit to display.

[0040] In each LED lamp panel, in each LED lamp string, adjacent LED lamp beads 100 are electrically connected through their power input ports Vin and power output ports Vout, i.e. the power output port Vout of the previous LED lamp bead 100 is electrically connected with the power input port Vin of the next adjacent LED lamp bead 100, forming a serial power supply circuit. This serial connection mode ensures that the power signal can be sequentially transmitted along the LED lamp string.

[0041] Further, in each LED lamp panel, the serial power supply circuits between adjacent LED lamp strings are connected in parallel to form a parallel power supply circuit; for each LED lamp panel, the serial power supply circuit and the parallel power supply circuit are integrated to form a serial-parallel power supply mode. Alternatively, the serial power supply circuits between adjacent LED lamp strings can be directly connected by wires, or other connection modes can also be used, which are not limited.

[0042] In this embodiment, for the LED lamp string in each LED lamp panel, the serial power supply mode is preferred, i.e. the LED lamp beads 100 on the LED lamp string are located on the same serial power supply circuit, and the same power supply is used to uniformly supply power to these LED lamp beads 100, each LED lamp bead 100 has the same current, which can ensure that the brightness of each LED is consistent, avoiding the problem of uneven brightness caused by current difference; in addition, under the serial power supply mode, it is not necessary to configure a current limiting resistor for each LED lamp bead 100, which can reduce the energy consumption of this part, especially as the number of LED lamp beads 100 increases, the energy consumption can be significantly saved. Furthermore, compared with the parallel power supply mode, the serial power supply mode only needs one constant current source to supply power to the entire LED lamp string, which is conducive to reducing the complexity of the driving chip. Further, compared with the parallel power supply mode, each LED lamp bead 100 in the serial power supply mode bears a relatively low current, which reduces the heat generation of a single LED, not only can reduce the energy consumption, but also helps to prolong the life of the LED.

[0043] Furthermore, for each LED light board, in addition to the serial power supply method, a parallel power supply method is introduced between adjacent LED strings, that is, a serial-parallel power supply method is adopted. On the one hand, the serial power supply method can ensure that the LED beads 100 in each LED string can obtain a stable power supply, and on the other hand, it allows the power signal to be transmitted in parallel between different LED strings. The parallel power supply method is used to solve the problem that if a certain LED bead 100 on the serial power supply line fails, the subsequent LED beads 100 will not be able to obtain a power signal.

[0044] Further optionally, in this embodiment, the arrangement of the LED light panel is not limited and can be a row and column arrangement. For example, in a row and column arrangement, the LED strings are organized into multiple rows and columns, with one LED string as a row and LED beads 100 at the same position in different LED strings as a column. The controller provides a power signal to the first LED bead 100 in each row, and then the power signal is transmitted in each LED string through a serial connection. Or, as... Fig. 2a and 2b As shown, in the row and column arrangement, LED light strings are organized into multiple columns and multiple rows. Each LED light string is a column, and the LED beads 100 at the corresponding positions in each LED light string form a row of LED beads. The controller provides a power signal to the first LED bead 100 in each column, and then the power signal is transmitted in each LED light string through a serial connection.

[0045] in, Fig. 2b This is a schematic diagram of the structure of an LED light board with serial and parallel power supply, provided as an exemplary embodiment of this application. (See diagram below.) Fig. 2b As shown, each LED string in the LED light board contains multiple LED beads 100, which are located in the same column. LED beads 100 at the same position in different LED strings (i.e., different columns) are located in the same row. Each row contains LED beads from different LED strings. The serial power supply lines between adjacent rows of LED beads 100 are connected in parallel to form parallel power supply lines. This connection method ensures that the LED beads 100 in each row can obtain a stable power supply, while allowing power signals to be transmitted in parallel between different columns. For example, LED beads 100 in a certain column of the previous row can supply power to the LED beads 100 in each column of the next row in parallel. LEDs in the previous row of the same column can supply power to the LED beads 100 in the next row in series, realizing a series-parallel hybrid power supply method. The parallel power supply method is used to solve the problem that if a certain LED bead 100 on the serial power supply line fails, the subsequent LED beads 100 will not be able to obtain a power signal.

[0046] Alternatively, the LED lamp beads 100 in the plurality of LED lamp strings in the LED lamp panel are arranged in a row-column manner, the LED lamp beads 100 in the same LED lamp string are located in the same row, the LED lamp beads 100 in the same position in different LED lamp strings are located in the same column, and the serial power supply lines between the adjacent two columns of LED lamp beads 100 are connected in parallel to form the parallel power supply lines. This connection manner ensures that each column of LED lamp beads 100 can obtain stable power supply, while allowing the power supply signals to be transmitted in parallel between different rows, realizing the hybrid power supply mode of series-parallel connection, and the parallel power supply mode is used to solve the problem that the subsequent LED lamp beads 100 cannot obtain the power supply signal due to the failure of a certain LED lamp bead 100 on the serial power supply line.

[0047] Further, in the hybrid power supply mode of series-parallel connection, considering that each LED lamp bead 100 simultaneously receives the power supply signals on the serial power supply line and the parallel power supply line, in the embodiment of the present application, each LED lamp bead 100 in the LED lamp panel further includes a power supply gating circuit arranged between the power input port Vin and the power input pin V1, which is used to select the power supply signal finally used from the serial power supply line and the parallel power supply line.

[0048] Specifically, the power supply gating circuit can detect whether the power supply signals are received on the serial power supply line and the parallel power supply line, in the case that the power supply signals exist on the serial power supply line and the parallel power supply line at the same time, the serial power supply line is connected with the power input pin V1, and the serial power supply mode is preferentially used, that is, the serial power supply line is preferentially used as the main power supply path to fully exert the advantage of the serial power supply mode; or in the case that the power supply signals exist on one of the serial power supply line and the parallel power supply line and do not exist on the other, the power supply line with the power supply signal is connected with the power input pin V1 to preferentially solve the power supply problem of the LED lamp bead 100.

[0049] Further, in the case that the serial power supply line has no power supply signal due to the failure of the previous LED lamp bead 100, the parallel power supply line as the standby route can be gated to supply power to the subsequent LED lamp bead 100 in time, so that the subsequent LED lamp bead 100 can work normally. This circuit design ensures that the power supply of the LED lamp bead 100 has high reliability and flexibility, the serial power supply line as the main power supply path can reduce energy consumption, ensure the consistency of the brightness of the LED lamp bead 100, and simplify the circuit complexity of the driving chip; and the parallel power supply line as the standby power supply path ensures that the subsequent LED lamp bead 100 can still obtain the power supply signal even when the main path has a problem, and the LED lamp bead 100 works normally.

[0050] In the embodiments of the present application, the power gating circuit contained in each LED lamp bead 100 in the LED lamp panel can be implemented by a relay or an electronic switch, but is not limited thereto.

[0051] In the LED display screen provided by the embodiments of the present application, the controller can not only provide power signals for the LED lamp beads in each LED lamp string, but also perform display control on each LED lamp bead. In the LED display screen where any LED lamp panel is located, the controller further includes a plurality of communication ports, which are respectively electrically connected with a plurality of LED lamp strings, for providing data signals to the plurality of LED lamp strings. The data signals refer to display data required for display control on the LED lamp beads.

[0052] Correspondingly, as shown in Fig. 3a and Fig. 3b , each LED lamp bead 100 further externally provides a first signal input port DI, a first signal output port DO, a second signal input port FDI and a second signal output port FDO in addition to the power input port Vin and the power output port Vout. The first signal input port DI and the first signal output port DO are respectively electrically connected with the first signal input pin P1 and the first signal output pin M1 of the LED driving chip 10, forming a transmission line of data signals; the second signal input port FDI and the second signal output port FDO are respectively electrically connected with the second signal input pin P2 and the second signal output pin M2 of the LED driving chip 10, forming another transmission line of data signals; through the two transmission lines, the LED driving chip 10 can transmit data signals to the LED light unit 20 to perform display control on the LED light unit 20.

[0053] Further, the first signal output port DO and the second output port FDO of the LED lamp bead 100 are respectively electrically connected with the first signal input port DI and the second signal input port FDI of the next LED lamp bead 100 in the LED lamp string to which the LED lamp bead 100 belongs, that is, the electrical connection between the corresponding signal input ports and the signal output ports of adjacent LED lamp beads 100 can form a serial signal line, which is used to ensure that the data signals can be continuously transmitted to the subsequent LED lamp beads 100.

[0054] For each LED lamp bead 100, the data signal can enter the first signal input pin P1 of the LED driving chip through the first signal input port DI, flow into the first signal output port DO through the first signal output pin M1 of the LED driving chip 10, and then enter the next LED lamp bead 100 through the first signal input port DI of the next LED lamp bead 100 to realize serial transmission; or the data signal can enter the second signal input pin P2 of the LED driving chip through the second signal input port FDI of the LED lamp bead 100, flow into the second signal output port FDO through the second signal output pin M2 of the LED driving chip, and then enter the next LED lamp bead 100 through the second signal input port FDI of the next LED lamp bead 100 to realize serial transmission. As can be seen, the above two transmission lines both pass through the LED driving chip 10, and if the LED driving chip 10 fails or the LED lamp bead 100 fails, the data signal will not be able to continue to be transmitted to the subsequent lamp beads.

[0055] In some optional embodiments, the LED lamp bead in the LED display screen can be implemented by using the LED lamp bead structure provided in the above embodiments, but is not limited thereto. For example, in other optional embodiments, in order to improve the fault tolerance of the data signal transmission between the LED lamp beads 100, for the LED lamp bead 100 in the LED display screen, a first breakpoint continuation line can be additionally arranged between the first signal input port DI and the second signal output port FDO of the LED lamp bead 100, that is, the LED driving chip 10 is directly electrically connected between the first signal input port DI and the second signal output port FDO, for example, the first signal input port DI and the second signal output port FDO can be directly electrically connected by wires, or wires (or wiring) not passing through the LED driving chip can be additionally arranged between the first signal input port DI and the second signal output port FDO on the PCB board on which the LED lamp bead 100 is located, and the first signal input port DI and the second signal output port FDO are directly electrically connected through the wires, thereby forming the first breakpoint continuation line between the first signal input port DI and the second signal output port FDO.

[0056] In the case of adding the first breakpoint transmission line, if the LED driving chip 10 in the LED lamp bead 100 fails (or the LED lamp bead 100 fails), as the first signal input port DI of the LED lamp bead 100 cannot transmit the data signal to the first signal input pin P1 of the LED driving chip, the first signal output pin M1, the first signal output port DO of the LED lamp bead 100, the second signal input port FDI of the LED lamp bead 100, the second signal input pin P2 of the LED driving chip, the second signal output pin M2, and the second signal output port FDO of the LED lamp bead 100, the data signal can be transmitted to the subsequent LED lamp bead 100 through the first breakpoint transmission line (in the case of skipping the LED driving chip) between the first signal input port DI and the second signal output port FDO of the LED lamp bead 100, ensuring the stable operation of the entire LED lamp string and reducing the failure of the entire LED lamp string due to the failure of a single LED lamp bead 100 or driving chip.

[0057] Further, on the basis of the LED lamp bead 100 shown in Fig. 3a or Fig. 3b , the LED lamp string in the LED display screen provided by the embodiment of the present application can use the above-mentioned LED lamp bead with the first breakpoint transmission line, but is not limited thereto. The following will focus on the LED lamp string using the LED lamp bead 100 shown in Fig. 3a or Fig. 3b . In this description, the LED lamp string in each LED lamp panel of the LED display screen has the same or similar implementation structure. As shown in Fig. 4a , the LED lamp string in the embodiment of the present application includes a plurality of LED lamp beads 100 connected in series; here, the series connection includes serial transmission of data signals and serial transmission of power signals. The number of LED lamp beads 100 included in the LED lamp string is not limited, for example, it can be 10, 30, 50, 100, etc., which can be determined according to the application scenario or the size of the display screen. The LED lamp string in the embodiment of the present application takes 11 LED lamp beads 100 as an example for illustration, but is not limited thereto. The implementation structure of each LED lamp bead 100 is as shown in Fig. 4a or Fig. 3a or Fig. 3bAs shown, each LED lamp bead 100 is provided with a first signal input port and a first signal output port, a second signal input port and a second signal output port, and encapsulates an LED driving chip and an LED light unit inside. In the LED light string, the first signal input port and the second signal input port of the first LED lamp bead 100 are responsible for receiving data signals from the controller. When the controller outputs data signals, the first signal input port and the second signal input port of the first LED lamp bead 100 receive these data signals, and then pass these signals to the next LED lamp bead 100 through the first signal output port and the second signal output port thereof. Such a serial connection mode ensures that data signals can be sequentially passed from one LED lamp bead 100 to the next one until the last lamp bead of the entire LED light string.

[0058] In the embodiment of the present application, each LED lamp bead 100 of the LED light string has two signal input ports (DI and FDI) and two signal output ports (DO and FDO). Among them, each LED lamp bead 100 encapsulates an LED driving chip and an LED light unit inside. The first signal input port (DI) of each LED lamp bead 100 and the second signal output port (FDO) form a path called "first breakpoint transmission line" through direct electrical connection. When the LED driving chip is working normally, data signals enter the LED lamp bead 100 through DI or FDI, and after being processed by the LED driving chip, they are transmitted to the next lamp bead through DO or FDO. However, if the LED driving chip fails, data signals will not be output through DO or FDO. At this time, since there is a direct electrical connection between DI and FDO, data signals can directly jump over the faulty LED driving chip from DI and be transmitted to the next LED lamp bead 100 through FDO. In this way, even if the LED driving chip of a certain LED lamp bead 100 fails, data signals can still continue to be transmitted to the next LED lamp bead 100, and the data transmission of the entire LED light string can still continue.

[0059] Further, Fig. 4b Another structure schematic diagram of an LED light string provided by the exemplary embodiment of the present application is provided. Fig. 4b In Fig. 4aThe second signal output port of the first LED lamp bead 100 in the LED lamp string is electrically connected with the second signal input port of the second LED lamp bead 100, thereby forming a second breakpoint continuation circuit, so that the data signal can continue to be transmitted to the second LED lamp bead 100 and the subsequent LED lamp bead 100 when two or more LED lamp beads 100 between the first LED lamp bead 100 and the second LED lamp bead 100 are faulty; wherein the first LED lamp bead 100 is any LED lamp bead 100 on the LED lamp string, and the second LED lamp bead 100 is spaced apart from the first LED lamp bead 100 by at least two LED lamp beads 100.

[0060] For ease of description, the first LED lamp bead 100 and the second LED lamp bead 100 can form a lamp bead group, and the first LED lamp bead 100 and the second LED lamp bead 100 in a lamp bead group are spaced apart by at least two LED lamp beads 100, for example, there can be 2 LED lamp beads 100, or 3, 4 or more LED lamp beads 100. In Fig. 4b For example, the first LED lamp bead 100 and the second LED lamp bead 100 are spaced apart by two LED lamp beads 100, but are not limited thereto.

[0061] There can be one or more lamp bead groups on an LED lamp string, and in the case of multiple lamp bead groups on an LED lamp string, different lamp bead groups have different first LED lamp beads 100 and second LED lamp beads 100. When two or more LED lamp beads 100 between the first LED lamp bead 100 and the second LED lamp bead 100 are faulty, these faulty LED lamp beads 100 cannot transmit data signals to the subsequent LED lamp beads 100 through the serial transmission circuit between them and the next LED lamp bead 100, but can transmit data signals to the next LED lamp bead 100 through the first breakpoint continuation circuit. Further, when the next LED lamp bead 100 also fails, it cannot continue to transmit data signals to the subsequent LED lamp beads 100 through the first breakpoint continuation circuit in the LED lamp bead 100, but due to the presence of the second breakpoint continuation circuit, the data signal can be directly sent from the second signal output port of the first LED lamp bead 100 to the second signal input port of the second LED lamp bead 100 through the second breakpoint continuation circuit, thereby ensuring that the data signal can continue to be transmitted to the second LED lamp bead 100 and the subsequent lamp beads. The second breakpoint continuation circuit can directly skip the faulty LED lamp beads 100 in the middle, ensuring that the data signal can continue to be transmitted to the second LED lamp bead 100 and the subsequent LED lamp beads 100, allowing local LED lamp beads 100 in the LED lamp string to fail without causing the entire LED lamp string to fail, thereby improving the performance of the LED lamp string.

[0062] For example, in Fig. 4b As shown in the first lamp bead group, the second signal output port of the first LED lamp bead 100 and the second signal input port of the second LED lamp bead 100 are electrically connected to form a second break-before-make circuit; when the first LED lamp bead 100 behind the first LED lamp bead 100 fails, the data signal can be transmitted to the LED lamp bead 100 behind through the first break-before-make circuit, but when the two LED lamp beads 100 behind the first LED lamp bead 100 fail, the data signal cannot be transmitted through the first break-before-make circuit, at this time, the data signal can be transmitted from the first LED lamp bead 100 to the second LED lamp bead 100 through the second break-before-make circuit.

[0063] In the embodiment of the present application, different lamp bead groups in the LED lamp string have different first LED lamp beads 100 and second LED lamp beads 100. As shown in Fig. 4b As shown, the first LED lamp beads 100 and the second LED lamp beads 100 in the first lamp bead group, the second lamp bead group and the third lamp bead group are all different.

[0064] In the embodiment of the present application, the positional relationship between the first LED lamp bead 100 in one lamp bead group and the second LED lamp bead 100 in another lamp bead group is not limited. In an optional embodiment, in the adjacent two lamp bead groups of the LED lamp string, the first LED lamp bead 100 in the latter lamp bead group is the LED lamp bead 100 in front of the second LED lamp bead 100 in the former lamp bead group, but is different from the first LED lamp bead 100 in the former lamp bead group, so that the adjacent lamp bead groups are staggered, which is conducive to further reducing the influence of the failed LED lamp bead 100. In another optional embodiment, in the adjacent two lamp bead groups of the LED lamp string, the first LED lamp bead 100 in the latter lamp bead group is the second LED lamp bead 100 or the LED lamp bead 100 behind it in the former lamp bead group, so that the adjacent lamp bead groups appear in sequence and are not staggered.

[0065] Further optionally, when there is only one LED lamp bead 100 between the adjacent two second break-before-make circuits in an LED lamp string, the LED lamp bead is the second LED lamp bead 100 in the former lamp bead group in the adjacent lamp bead group and is the first LED lamp bead 100 in the latter lamp bead group. When there are at least two LED lamp beads 100 between the adjacent two second break-before-make circuits in an LED lamp string, the first LED lamp bead 100 in the latter lamp bead group in the adjacent lamp bead group is the LED lamp bead 100 behind the second LED lamp bead 100 in the former lamp bead group. As shown in Fig. 4bAs shown, the second breakpoint resume line in the first LED group and the second breakpoint resume line in the second LED group are separated by only one LED 100. This LED is both the second LED 100 in the first LED group and the first LED 100 in the second LED group. The breakpoint resume line in the second LED group and the breakpoint resume line in the third LED group are separated by two LEDs 100. The first LED 100 in the third LED group is the LED 100 that follows the second LED 100 in the second LED group.

[0066] In the embodiments of this application, the number of LED beads 100 spaced between the first LED bead 100 and the second LED bead 100 in different LED bead groups can be the same or different. The number of LED beads 100 spaced between the first LED bead 100 and the second LED bead 100 in each LED bead group can be adjusted according to different application scenarios, such as the voltage requirements of each LED bead 100 or the failure probability of the LED bead 100, etc., which are not limited in this embodiment. For example, if the application scenario requires all LED beads 100 in an LED string to have the same voltage, then the number of LED beads 100 between the first LED bead 100 and the second LED bead 100 in different LED bead groups in the LED string is the same. If the application scenario requires the first LED bead group to have LED beads 100 with higher voltage and the second LED bead group to have LED beads 100 with lower voltage, then the first LED bead group to have two LED beads 100 between the first LED beads 100 and the second LED bead 100, and the second LED bead group to have five LED beads 100 between the first LED beads 100 and the second LED bead 100, then the number of LED beads between the first LED beads 100 and the second LED bead 100 in different LED bead groups in the LED string is different.

[0067] Fig. 4c This is a schematic diagram of another LED light string provided as an exemplary embodiment of this application. Fig. 4a and Fig. 4b Compared to the LED light strings shown, Fig. 4c The illustrated light string shows a partial structure inside the LED beads 100. For example... Fig. 4c As shown, the LED string comprises multiple LED beads 100, which are connected in series. The serial connection relationship between the multiple LED beads 100 and the data signal transmission lines are the same as in the previous embodiment, and will not be repeated here. Similarly, the internal structure of each LED bead 100 is also the same as that of the LED bead 100 in the previous embodiment, and will not be repeated here.

[0068] Further optionally, in Fig. 4c In the LED lamp string shown, the LED driving chip in the LED lamp bead 100 comprises a monitoring circuit electrically connected with the first signal input pin and the second signal input pin of the LED driving chip, an analysis circuit electrically connected with the monitoring circuit, and a driving circuit electrically connected with the analysis circuit; wherein the monitoring circuit is configured to monitor whether data signals are received on the first signal input pin and the second signal input pin, and output the data signals and the pin identification of the any one signal input pin on which the data signals are received to the analysis circuit in the case that data signals are received on any one signal input pin.

[0069] It is explained herein that data signals can be received on both signal input pins. Alternatively, if data signals are received on the two signal input pins successively, the earlier received data signal is taken as the main one, the signal input pin on which the earlier received data signal is received is taken as the main pin, the pin identification of the main pin and the output value of the data signal received on the main pin are output to the analysis circuit; and the signal input pin on which the later received data signal is received is taken as the backup pin, and the data signal received on the backup pin is discarded. Alternatively, if data signals are received on the two signal input pins simultaneously, the first signal input pin is taken as the main pin, the pin identification of the main pin and the output value of the data signal received on the main pin are output to the analysis circuit; and the second signal input pin is taken as the backup pin, and the data signal received on the backup pin is discarded.

[0070] In the embodiment, in combination with the first breakpoint transmission circuit and / or the second breakpoint transmission circuit provided in the foregoing embodiment, it can be known that the remaining data segments in the data signals coming from different signal input pins are different, which leads to different processing manners of the LED driving chip in the subsequent LED lamp bead 100. Therefore, in the embodiment, different analysis manners are implemented for different signal input pins, and the analysis circuit adopts a suitable analysis manner to analyze the data segment required by the LED lamp bead 100 to which the analysis circuit belongs from the received data signals.

[0071] Specifically, the parsing circuit is configured to receive the pin identifier and the data signal output by the monitoring circuit, parse the data segment corresponding to the LED light unit from the data signal according to the parsing mode corresponding to the pin identifier, and output the data segment to the driving circuit; the data segment contains specific information on how to control the LED light unit, such as display attributes such as brightness adjustment or color change; the driving circuit controls the LED light unit according to the data segment, so that the LED lamp bead 100 emits light in the expected manner.

[0072] In the above embodiment, if the pin identifier output by the monitoring circuit corresponds to the first signal input pin, the corresponding parsing mode is to parse the data segment required by the LED lamp bead 100 from the corresponding position in the received data signal according to the serial order between the LED lamp beads 100; if the pin identifier output by the monitoring circuit corresponds to the second signal input pin, the corresponding parsing mode not only needs to parse the data segment required by the LED lamp bead 100 from the corresponding position in the received data signal according to the serial order between the LED lamp beads 100, but also can delete other data segments (these data segments correspond to the faulty LED lamp bead 100 and belong to invalid data segments) before the data segment, so as to reduce the amount of data transmitted to the subsequent transmission and save transmission and processing resources. It is explained here that the processing mode of the data signal by the LED driving chip and the corresponding parsing mode are only exemplary and are not limited thereto, and the embodiment of the present application does not limit the same.

[0073] In the embodiment of the present application, the LED driving chip includes a monitoring circuit, a parsing circuit and a driving circuit. The monitoring circuit ensures that the data signal can be correctly identified and transmitted regardless of which pin the data signal is input from; the parsing circuit processes the data according to the specific parsing mode of different pins to ensure the correct extraction of the data segment; and the driving circuit accurately controls the LED light unit according to the parsed data segment to achieve the expected display effect. The whole process realizes seamless connection from signal monitoring, parsing to final control, allowing the same LED driving chip to flexibly control the LED light unit according to different input signals, ensuring the accuracy and efficiency of signal processing, and also improving the control flexibility and performance of the LED lamp string.

[0074] Fig. 4d Another structure diagram of the LED lamp string is provided for the exemplary embodiment of the present application. In the structure diagram, Figs. 4a-4c the structure related to the data signal is mainly illustrated, and in the structure diagram Fig. 4d both the structure related to the power signal and the structure related to the data signal are completely illustrated. The structure related to the data signal and the structure related to the power signal are described above, and will not be described again here.

[0075] In the embodiments of the present application, the signal flow direction in the at least two LED lamp panels is not limited. For example, the signal flow directions in the at least two LED lamp panels are the same, or the signal flow directions in at least some adjacent LED lamp panels in the at least two LED lamp panels are opposite. For example, the signal flow direction of the last LED lamp panel in the at least two LED lamp panels is opposite to the signal flow directions of the other LED lamp panels. The signal flow direction herein includes the flow directions of data signals and power signals. For one LED lamp panel, the signal flow direction can be from top to bottom, or from bottom to top, or from left to right, or from right to left. In Fig. 1a In the embodiment, the signal flow directions of the three LED lamp panels D-F are all from top to bottom.

[0076] In addition, the controller can be arranged at the top and / or bottom of the LED display screen, that is, the top of the LED display screen can be provided with a controller, the bottom of the LED display screen can be provided with a controller, or the top and the bottom can be provided with a controller at the same time. The controller is responsible for driving a certain length of LED lamp string, and the specific length is not limited, for example, 5 meters, 6 meters or 8 meters long lamp string, and the numbers herein are only examples. The length of the LED lamp string that can be driven by each controller can also be longer or shorter. If one controller is used, it can be located at the top or the bottom of the LED display screen; when more LED lamp panels need to be driven, two controllers can be used, and the two controllers are arranged at the top and the bottom of the display screen respectively. This configuration method makes the middle of the entire LED display screen not have an obstruction caused by the controller, which meets the transparency requirement of the display screen, and thus the LED display screen can be realized as a transparent screen. When the controller is located at the top of the display screen or there are two controllers (one at the top of the LED display screen and one at the bottom), the entire display screen can be designed as a hanging screen. This way is suitable for places with high ceilings, such as exhibition halls, theaters or large conference rooms, providing flexible installation options. If only the controller is arranged at the bottom of the display screen, there is usually a base to support the entire display screen, making it a kind of form standing on the ground. This way is suitable for scenes that do not need to be hung, such as shop windows or small display spaces. Further optionally, the controller can also be arranged at the side of the LED display screen where the LED lamp panels are located. The entire display screen can be designed as a straight LED screen or a curved LED screen controlled from the side. This way is suitable for occasions that need to access signals or power from the side, such as commercial advertising, stage performance, traffic indication, etc. Optionally, the controller and the LED lamp panel can be directly electrically connected, or can be realized through a dedicated connector. These connectors not only ensure the reliability of the electrical connection, but also facilitate installation and maintenance. Fig. 1a In the embodiment, the controller is arranged at the top of the LED lamp panel.

[0077] Fig. 1b Another structure diagram of an LED display screen is provided for the exemplary embodiments of the present application. As shown in FIG. 1c, the LED display screen is composed of three LED lamp panels J-L, wherein each LED lamp string in each LED lamp panel has the same internal structure as the LED lamp string in Fig. 1b Fig. 4d Fig. 1b In the LED display screen shown in FIG. 1c, the two controllers are respectively arranged at the top and bottom of the LED display screen, the signal flow directions of the LED lamp panels J and K are the same, i.e., both are from top to bottom, and the signal flow direction of the last LED lamp panel L is opposite, i.e., from bottom to top. In this way, the shielding caused by the controllers on the LED display screen can be avoided. Finally, the LED light-emitting unit 20 and the LED driving chip 10 in the internal package of the LED lamp bead 100 in the embodiments of the present application are introduced as follows:

[0078] Fig. 1c Another structure diagram of an LED display screen is provided for the exemplary embodiments of the present application. As shown in FIG. 1c, the LED display screen is composed of three LED lamp panels J-L, wherein each LED lamp string in each LED lamp panel has the same internal structure as the LED lamp string in Fig. 4d Fig. 1c In the LED display screen shown in FIG. 1c, the two controllers are respectively arranged at the top and bottom of the LED display screen, the signal flow directions of the LED lamp panels J and K are the same, i.e., both are from top to bottom, and the signal flow direction of the last LED lamp panel L is opposite, i.e., from bottom to top. In this way, the shielding caused by the controllers on the LED display screen can be avoided. Finally, the LED light-emitting unit 20 and the LED driving chip 10 in the internal package of the LED lamp bead 100 in the embodiments of the present application are introduced as follows:

[0079] The LED light-emitting unit 20 is a basic light-emitting component, which is composed of one or more LED chips and related accessory elements. The LED light-emitting unit 20 is the core part of realizing light output, which is a diode made of semiconductor materials and emits light when current passes through; wherein the semiconductor materials that can be used include but are not limited to gallium arsenide (GaAs), gallium nitride (GaN), aluminum gallium indium phosphide (AlGaInP), etc.

[0080] ​​​The LED driving chip 10 is an integrated circuit specially used for controlling and driving the LED light-emitting unit, and its main function is to ensure the LED light-emitting unit 20 to operate under safe and efficient working conditions, and to provide various additional functions to meet the needs of different application scenarios, such as but not limited to: display control of the LED light-emitting unit 20, power supply control of the LED light-emitting unit 20, etc. Among them, the display control of the LED light-emitting unit 20 includes but is not limited to: providing data signals for the LED light-emitting unit 20, dimming control of the LED light-emitting unit 20, etc.; the power supply control of the LED light-emitting unit 20 includes but is not limited to: providing power supply current for the LED light-emitting unit 20, and overvoltage protection (to prevent high input voltage from damaging the LED light-emitting unit), overcurrent protection (to prevent excessive current from causing the LED light-emitting unit to overheat or be damaged), short circuit protection (when the circuit is short-circuited, the power supply is automatically cut off to protect the safety of the LED light-emitting unit), etc.

[0081] Among them, the LED driving chip 10 and the LED light-emitting unit 20 respectively have a plurality of pins, and the interconnection relationship between these pins is the basis for the LED driving chip 10 to control and drive the light-emitting of the LED light-emitting unit 20. These pins are electrically connected to each other through circuit design, so that the LED driving chip 10 transmits data signals to the LED light-emitting unit 20, which are used to control the behavior of the LED light-emitting unit 20. Different behaviors of the LED light-emitting unit 20 can be controlled by setting different signal inputs, including but not limited to brightness adjustment, color correction, temperature compensation, etc. The signal driving form of these data signals can be diverse, as long as it can meet the needs of LED display. In the embodiments of the present application, this is not limited. For example, the signal driving can be a simple clock driving for synchronizing the data signal; it can be a data driving for transmitting image or text information; it can also be a control driving for adjusting the on-off state and brightness level of the LED. This design enables the LED light-emitting unit 20 to accurately reproduce various images and video content, providing a rich and colorful visual experience. In the embodiments of the present application, the internal implementation structure and pins of the LED driving chip 10 are not limited, and the internal implementation structure and pins of the LED light-emitting unit 20 are also not limited. In the following, only the pins of the LED driving chip 10 and the pins of the LED light-emitting unit 20 are exemplarily described from the functional point of view:

[0082] The pins of the LED driving chip 10 include but are not limited to: 1. A power input pin V1 for connecting an external power signal. 2. A ground pin, which can be used as a ground wire of a circuit, for reference potential, and is connected to an external common ground wire. 3. A dimming control pin for receiving a dimming signal such as a PWM signal or an analog voltage to adjust the brightness of the LED. 4. An enable pin for controlling the on and off state of the LED driving chip 10; 5. A power output pin V2 for providing driving current to the LED lighting unit 20. 6. A communication interface pin for realizing digital communication between the LED lighting unit 20 and the outside. In the embodiment of the present application, the communication interface pin of the LED driving chip 10 at least includes: a first signal input pin P1 and a first signal output pin M1, a second signal input pin P2 and a second signal output pin M2, and a signal control pin as an example.

[0083] The pins of the LED lighting unit 20 include but are not limited to: 1. A positive pin as the positive of the LED for accepting current inflow, which can be connected to the power output pin V2 of the LED driving chip 10. 2. A negative pin as the negative of the LED responsible for current outflow, which can be connected to the power output pin V2 of the LED driving chip 10 or directly to the ground wire. 3. A communication pin for connecting the communication interface pin of the LED driving chip 10, such as the signal control pin, for receiving data signals and displaying.

[0084] It should be noted that the "first", "second", and the like in the present text are used to distinguish different messages, devices, modules, etc., and do not represent the order of sequence, nor do they limit the "first" and "second" to be different types.

[0085] It should also be noted that the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, product or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, product or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, product or device including the element.

[0086] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. An LED display screen, characterized in that, include: Controller and at least two LED light panels; Each LED light panel includes: multiple LED light strings; Each LED string includes: multiple LED beads, each LED bead is provided with a power input port and a power output port, and each LED bead internally encapsulates an LED driver chip and an LED light-emitting unit; The controller is electrically connected to the power input port of the first LED and the power output port of the last LED in each LED string, and is used to provide power signals to the LEDs. The power input port and power output port of each LED bead are electrically connected to the power input pin and power output pin of the internal LED driver chip, respectively, so as to provide power signals to the LED light-emitting unit through the LED driver chip; In each LED light panel, the power input ports and power output ports of adjacent LED beads in each LED string are electrically connected to form a serial power supply line, and the serial power supply lines between adjacent LED strings are connected in parallel to form a parallel power supply line.

2. The LED display screen according to claim 1, characterized in that, In the LED light panel, the LED beads in the multiple LED light strings are arranged in rows and columns. The LED beads in the same LED light string are located in the same column, and the LED beads at the same position in different LED light strings are located in the same row. The serial power supply lines between adjacent rows of LED beads are connected in parallel to form parallel power supply lines. or, In the LED light panel, the LED beads in the multiple LED light strings are arranged in rows and columns. The LED beads in the same LED light string are located in the same row, and the LED beads at the same position in different LED light strings are located in the same column. The serial power supply lines between adjacent columns of LED beads are connected in parallel to form parallel power supply lines.

3. The LED display screen according to claim 2, characterized in that, In the LED light board, each LED chip also includes a power gating circuit disposed between the power input port and the power input pin; When the power selection circuit detects that power signals exist simultaneously on both the serial power supply line and the parallel power supply line, it connects the serial power supply line to the power input pin; or, when it detects that one of the serial power supply line and the parallel power supply line has a power signal while the other does not, it connects the line with the power signal to the power input pin.

4. The LED display screen according to claim 1, characterized in that, In any LED light panel, the controller is electrically connected to the multiple LED light strings through multiple communication ports to provide data signals to the multiple LED light strings; Each LED bead is also equipped with a first signal input port and a first signal output port, a second signal input port and a second signal output port; The first signal input port, second signal input port, first signal output port, and second signal output port of each LED are electrically connected to the first signal input pin, second signal input pin, first signal output pin, and second signal output pin of the internal LED driver chip, respectively, so as to transmit data signals to the LED light-emitting unit through any signal input pin of the LED driver chip; In the same LED string, the first signal output port and the second output port of adjacent LED beads are electrically connected to the first signal input port and the second signal input port, respectively, to form a serial signal line; and The first signal input port and the second signal output port of each LED bead are directly electrically connected, bypassing the internal LED driver chip, to form the first breakpoint continuation line.

5. The LED display screen according to claim 4, characterized in that, Electrical connection is made between the second signal output port of the first LED bead and the second signal input port of the second LED bead in any LED string to form a second breakpoint continuation line. Wherein, the first LED bead is any LED bead on any LED string, and the second LED bead is spaced at least two LED beads apart from the first LED bead.

6. The LED display screen according to claim 5, characterized in that, The first LED and the second LED form a group of LEDs. Each LED string has one or more groups of LEDs, and different groups of LEDs have different first LEDs and second LEDs.

7. The LED display screen according to claim 6, characterized in that, In two adjacent LED groups, the first LED in the latter LED group is either the second LED in the former LED group or the LED following the second LED in the former LED group. or, In two adjacent LED groups, the first LED in the latter LED group is the LED in front of the second LED in the former LED group.

8. The LED display screen according to claim 5, characterized in that, The LED driver chip includes: a monitoring circuit electrically connected to the first signal input pin and the second signal input pin, a parsing circuit electrically connected to the monitoring circuit, and a driving circuit electrically connected to the parsing circuit; When the monitoring circuit receives a data signal at any signal input pin, it outputs the data signal and the pin identifier of the signal input pin to the parsing circuit. The parsing circuit parses the data segment corresponding to the LED light-emitting unit from the data signal according to the parsing method corresponding to the pin identifier, and outputs the data segment to the driving circuit. The driving circuit performs display control on the LED light-emitting unit according to the data segment. Different signal pins correspond to different parsing methods.

9. The LED display screen according to any one of claims 1-8, characterized in that, The signal flow directions of the at least two LED panels are the same, or the signal flow directions of at least some adjacent LED panels are opposite; the signal flow direction includes at least the direction of the power signal.

10. The LED display screen according to claim 9, characterized in that, The controller is located at the bottom and / or top of the LED display screen.

Images