LED strings, LED panels, and LED display screens

Abstract

The company provides LED strings, LED panels, and LED display screens. [Solution] The first signal input port and the second signal output port of the LED light bead are directly electrically connected, forming a first breakpoint transmission resumption line, ensuring that data signals can be transmitted to the next LED light bead even if a failure occurs in the LED driver chip. The second signal output port and the second signal input port between the first and second LED light beads, which are spaced apart by at least two LED light beads, are electrically connected, forming a second breakpoint transmission resumption line, ensuring that data signals can be transmitted to the second and subsequent LED light beads even if a failure occurs in multiple consecutive LED light beads. Furthermore, the use of a serial power supply method reduces energy consumption.

Description

[Technical Field]

[0001] The present application relates to the technical field of displays, and in particular to LED strings, LED panels, and LED display screens. [Background technology]

[0002] With the rapid development of science and technology, LED (light-emitting diode) technology has been widely used in fields such as lighting and display due to its high energy efficiency, long life and environmental protection characteristics. Especially in the field of display technology, LED display screens have become the first choice for indoor and outdoor advertising, stage backgrounds, information display and other applications due to their excellent display effect and flexibility.

[0003] In the field of LED display, an LED strip screen is a common LED display screen, which usually includes a controller and multiple LED strings, each of which includes multiple LED light beads. The controller controls the display of the LED light beads of the multiple LED strings, i.e., it is responsible for supplying data signals to each LED string, and the data signals are transmitted from the first LED light bead to the subsequent LED light beads in the LED string, so that each LED light bead displays corresponding data.

[0004] In the above LED strip screen, if one of the LED light beads in the same LED string fails, the subsequent LED light beads will not be able to receive data signals properly. Summary of the Invention [Problem to be solved by the invention]

[0005] The various aspects of the present application provide an LED string, an LED panel, and an LED display screen that solve the problem of subsequent LED light beads being unable to receive data signals properly due to a failure in a previous LED light bead by forming a breakpoint transmission resume line in the LED string, thereby improving the reliability of the LED display screen. [Means for solving the problem]

[0006] An embodiment of the present application provides an LED string including a plurality of serially connected LED light beads, each having a first signal input port, a first signal output port, and a second signal input port, and a second signal output port, and an LED driving chip and an LED light unit packaged inside the LED light bead, the first signal input port, the second signal input port, the first signal output port, and the second signal output port of each LED light bead being electrically connected to the first signal input pin, the second signal input pin, the first signal output pin, and the second signal output pin of the LED driving chip located inside, respectively, so that a data signal is transmitted to the LED light unit via any signal input pin of the LED driving chip, and the first signal output port and the second signal output port of an adjacent LED light bead are electrically connected to the first signal input port and the second signal input port, respectively, forming a serial signal line, and the first signal input port and the second signal output port of each LED light bead are electrically connected directly, skipping the LED driving chip located inside, forming a first breakpoint transmission resumption line.

[0007] An embodiment of the present application provides an LED panel including a plurality of LED strings, each of which includes a plurality of LED light beads. Each LED light bead is provided with a first signal input port, a first signal output port, and a second signal input port and a second signal output port. An LED driving chip and an LED light unit are packaged inside the LED light bead. The first signal input port, the second signal input port, the first signal output port, and the second signal output port of each LED light bead are electrically connected to the first signal input pin, the second signal input pin, the first signal output pin, and the second signal output pin of the LED driving chip located therein, respectively. Thus, a data signal is transmitted to the LED light unit via any signal input pin of the LED driving chip. The first signal output port and the second signal output port of an adjacent LED light bead are electrically connected to the first signal input port and the second signal input port, respectively, forming a serial signal line. The first signal input port and the second signal output port of each LED light bead are electrically connected directly, skipping the LED driving chip located therein, forming a first breakpoint transmission resumption line.

[0008] An embodiment of the present application includes a controller and at least two LED panels, the at least two LED panels being joined in order to form the LED display screen, the controller being disposed on the top and / or bottom of the LED display screen, each LED panel including a plurality of LED strings, each LED string including a plurality of LED light beads, each LED light bead having a first signal input port, a first signal output port, and a second signal input port and a second signal output port, and an LED driving chip and an LED light unit are packaged inside the LED light bead, and the first signal input port, the second signal input port, the first signal output port, and the second signal output port of each LED light bead are respectively connected to the first signal input pin and the second signal output pin of the LED driving chip therein. and a first signal input pin, a first signal output pin, and a second signal output pin of the at least two LED light beads are electrically connected to the first signal input pin, the first signal output pin, and the second signal output pin of the at least two LED light beads, so that a data signal is transmitted to the LED light-emitting unit through any one of the signal input pins of the LED driving chip; the first signal output port and the second output port of an adjacent LED light bead 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 light bead are directly electrically connected, skipping the LED driving chip therein, to form a first breakpoint transmission resumption line; and the signal flow directions in the at least two LED panels are the same, or the signal flow directions of at least some of the adjacent LED panels of the at least two LED panels are opposite.

[0009] An embodiment of the present application provides an LED panel including a plurality of LED strings, each of which includes a plurality of LED light beads, each of which has a power input port and a power output port, and each of which has an LED driving chip and an LED light unit packaged therein, the power input port and the power output port of each LED light bead electrically connected to the power input pin and the power output pin of the LED driving chip therein, respectively, so that the LED driving chip supplies a power signal to the LED light unit, and in the same LED string, the power output port and the power input port of adjacent LED light beads 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.

[0010] An embodiment of the present application provides an LED display screen including a controller and at least two LED panels, each LED panel including a plurality of LED strings, each LED string including a plurality of LED light beads, each LED light bead having a power input port and a power output port, an LED driving chip and an LED light unit packaged inside the LED light bead, the controller is electrically connected to the power input port of the first LED light bead of each LED string and the power output port of the last LED light bead, and is used to supply power signals to the LED light beads, the power input port and the power output port of each LED light bead are electrically connected to the power input pin and the power output pin of the LED driving chip therein, respectively, so that the LED driving chip supplies power signals to the LED light units, and in each LED panel, the power input ports and power output ports of adjacent LED light beads of 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.

[0011] In the embodiment of the present application, the first signal input port and the second signal output port of the LED light bead are directly electrically connected, and a first breakpoint transmission resumption line is formed, thereby ensuring that the data signal can be transmitted to the next LED light bead even if a failure occurs in the LED driving chip, and solving the problem that the data signal cannot be transmitted to the subsequent LED light bead due to a failure in a specific LED light bead.

[0012] More preferably, the second signal output port and the second signal input port are electrically connected between the first LED light bead and the second LED light bead, which are spaced apart by at least two LED light beads, and a second breakpoint transmission resumption line is formed, so that even if a failure occurs in a plurality of consecutive LED light beads, the data signal can still be transmitted to the second LED light bead and subsequent LEDs, thereby solving the problem that if a failure occurs in a plurality of consecutive LED light beads, the data signal cannot be transmitted to subsequent LED light beads.

[0013] More preferably, the LED strings adopt a serial power supply method to save energy consumption.

[0014] More preferably, the LED panel and the LED display screen adopt a serial-parallel hybrid power supply method, which saves energy consumption while solving the problem of the serial power supply method in which a failure in a specific LED light bead causes the power supply to subsequent LED light beads to be cut off, thereby minimizing the number of LED light beads whose power supply is cut off and reducing the risk of the entire LED display screen becoming inoperable, thereby improving the reliability of the LED display screen. [Brief explanation of the drawings]

[0015] The drawings described herein are intended to provide a further understanding of the present application and constitute a part of the present application, and the schematic examples and description thereof are for purposes of illustration only and are not intended to unduly limit the present application. [Figure 1a] 1 is a structural schematic diagram of an example of an LED light bead according to an exemplary embodiment of the present application; [Figure 1b] 2 is a structural schematic diagram of another LED light bead according to an exemplary embodiment of the present application; [Figure 2a] FIG. 2 is a structural schematic diagram of an example of an LED string according to an exemplary embodiment of the present application. [Figure 2b] FIG. 10 is a structural schematic diagram of another LED string according to an exemplary embodiment of the present application. [Figure 2c] FIG. 10 is a structural schematic diagram of yet another LED string according to an exemplary embodiment of the present application. [Figure 2d] FIG. 10 is a structural schematic diagram of yet another LED string according to an exemplary embodiment of the present application. [Figure 3a] 1 is a structural schematic diagram of a serially powered LED panel according to an exemplary embodiment of the present application; [Figure 3b] 1 is a structural schematic diagram of a serial-parallel power supply type LED panel according to an exemplary embodiment of the present application; [Figure 4a] 1 is a structural schematic diagram of an LED display screen according to an exemplary embodiment of the present application; [Figure 4b] FIG. 2 is a structural schematic diagram of another LED display screen according to an exemplary embodiment of the present application; [Figure 4c] FIG. 10 is a structural schematic diagram of yet another LED display screen according to an exemplary embodiment of the present application; [Figure 4d] FIG. 10 is a structural schematic diagram of yet another LED display screen according to an exemplary embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0016] In order to clarify the objectives, technical solutions and advantages of the present application, the technical solutions of the present application will be described below clearly and completely with reference to specific embodiments of the present application and the corresponding drawings. It is clear that the described embodiments are only a part of the embodiments of the present application, and do not include all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0017] In the same LED string, if one of the LED light beads fails, the subsequent LED light beads will be unable to receive data signals properly, which is a technical problem. In the embodiment of the present application, the first signal input port and the second signal output port of the LED light bead are directly electrically connected, forming a first breakpoint transmission resumption line, which ensures that the data signal can be transmitted to the next LED light bead even if the LED driver chip fails, thereby solving the problem of the data signal not being transmitted to the subsequent LED light beads due to a failure in a specific LED light bead.

[0018] More preferably, in the embodiment of the present application, the second signal output port and the second signal input port are electrically connected between the first LED light bead and the second LED light bead, which are spaced apart by at least two LED light beads, and a second breakpoint transmission resumption line is formed, so that even if a failure occurs in a plurality of consecutive LED light beads, the data signal can still be transmitted to the second LED light bead and subsequent LEDs, thereby solving the problem that if a failure occurs in a plurality of consecutive LED light beads, the data signal cannot be transmitted to subsequent LED light beads.

[0019] More preferably, in the embodiment of the present application, the LED strings adopt a serial power supply method, which can save the energy consumption of the power supply.

[0020] More preferably, in the embodiments of the present application, the LED panel and the LED display screen adopt a serial-parallel hybrid power supply method, thereby saving energy consumption of the power supply and solving the problem of the serial power supply method in which a failure of a specific LED light bead causes the power supply to subsequent LED light beads to be cut off, thereby minimizing the number of LED light beads whose power supply is cut off. The LED display screen is made by joining at least two LED panels, and the serial power supply lines of the LED light beads of the LED panel in adjacent rows or columns are connected in parallel to form a parallel power supply line, and the power gate circuit inside each LED light bead can intelligently select the power supply line, thereby reducing the risk that a failure of some LED light beads will cause the entire LED display screen to fail, and improving the reliability of the LED display screen.

[0021] The technical solutions according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0022] 1a is a structural schematic diagram of an example of an LED light bead according to an exemplary embodiment of the present application. As shown in FIG. 1a, the embodiment of the present application provides a new LED light bead structure, namely, an LED light bead 100, in which an LED driving chip 10 and an LED emitting unit 20 are packaged.

[0023] The LED light emitting unit 20 is the basic light emitting component, consisting of one or more LED chips and associated supporting elements. The LED light emitting unit 20 is the core for outputting light; it is a diode that emits light when a current passes through it and is fabricated from semiconductor materials, including, but not limited to, gallium arsenide (GaAs), gallium nitride (GaN), aluminum gallium indium phosphide (AlGaInP), etc.

[0024] The LED driver chip 10 is an integrated circuit specifically for controlling and driving the LED lighting unit. Its main role is to ensure that the LED lighting unit 20 operates under safe and efficient operating conditions and to provide various additional functions to meet the needs of various application scenarios. These additional functions include, but are not limited to, display control of the LED lighting unit 20 and power control of the LED lighting unit 20. Display control of the LED lighting unit 20 includes, but is not limited to, providing data signals to the LED lighting unit 20 and controlling the dimming of the LED lighting unit 20. Power control of the LED lighting unit 20 includes, but is not limited to, supplying power to the LED lighting unit 20 and providing overvoltage protection (preventing the LED lighting unit from being damaged due to excessive input voltage), overcurrent protection (preventing the LED lighting unit from being overheated or damaged due to excessive current), and short-circuit protection (automatically cutting off the power supply when a short circuit occurs, ensuring the safety of the LED lighting unit).

[0025] The LED driver chip 10 and the LED lighting unit 20 each have multiple pins. The interconnection between these pins forms the basis for the LED driver chip 10 to control and drive the LED lighting unit 20. These pins are electrically connected to each other through circuit design, allowing the LED driver chip 10 to transmit data signals to the LED lighting unit 20, which in turn control the operation of the LED lighting unit 20. Various signal inputs are configured to control various operations of the LED lighting unit 20, including, but not limited to, brightness adjustment, color correction, and temperature correction. The signal driving forms of these data signals may vary, but as long as they meet the needs of the LED display, the embodiments of the present application are not limited thereto. For example, the signal driving may be a simple clock driving for synchronizing data signals, a data driving for transmitting image or text information, or a control driving for adjusting the on / off state and brightness level of the LEDs. With this design, the LED lighting unit 20 can accurately reproduce various image and video content, providing a rich visual experience. In the embodiments of the present application, the internal mounting structure and pins of the LED driving chip 10 are not particularly limited, and similarly, the internal mounting structure and pins of the LED light-emitting unit 20 are not particularly limited. Below, the pins of the LED driving chip 10 and the pins of the LED light-emitting unit 20 will be described as examples based on their functions only.

[0026] The pins of the LED driver chip 10 include, but are not limited to, the following: 1. Power input pin V1: used to connect to an external power signal. 2. Ground pin: can function as the circuit ground, is used as a reference potential, and is connected to an external common ground. 3. Dimming control pin: receives a dimming signal, such as a PWM signal or an analog voltage, to adjust the LED brightness. 4. Enable pin: used to control the on / off state of the LED driver chip 10. 5. Power output pin V2: used to supply a driving current to the LED light-emitting unit 20. 6. Communication interface pin: used to realize digital communication between the LED light-emitting unit 20 and the outside. In the embodiments of the present application, the communication interface pins of the LED driver chip 10 include at least a first signal input pin P1, a first signal output pin M1, a second signal input pin P2, a second signal output pin M2, and a signal control pin.

[0027] The pins of the LED light emitting unit 20 include, but are not limited to, the following: 1. Positive pin: serves as the positive pole of the LED, through which current flows, and can be connected to the power output pin V2 of the LED driving chip 10. 2. Negative pin: serves as the negative pole of the LED, through which current flows out, and can be connected to the power output pin V2 of the LED driving chip 10 or directly connected to ground. 3. Communication pin: used to connect to the communication interface pin of the LED driving chip 10, such as a signal control pin, and used to receive and display data signals.

[0028] In the present embodiment, to facilitate the provision of data signals from an external device (e.g., an LED display screen controller) to the LED driver chip 10, the data signals refer to display data required to control the display of the LED light bead. As shown in FIG. 1a, the LED light bead 100 has 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 connected to the external device. The first signal input port DI and the first signal output port DO are electrically connected to the first signal input pin P1 and the first signal output pin M1 of the LED driver chip 10, respectively, to form a data signal transmission line. The second signal input port FDI and the second signal output port FDO are electrically connected to the second signal input pin P2 and the second signal output pin M2 of the LED driver chip 10, respectively, to form a data signal transmission line. Here, the two transmission lines may transmit data signals from the LED driver chip 10 to the LED light unit 20 to control the display of the LED light unit 20.

[0029] Furthermore, the first signal output port DO and second signal output port FDO of the LED light bead 100 are electrically connected to the first signal input port DI and second signal input port FDI of the next LED light bead 100 in the LED string to which the LED light bead 100 belongs, respectively. That is, the corresponding signal input ports and signal output ports of adjacent LED light beads 100 are electrically connected to form a serial signal line, which ensures that data signals can be continuously transmitted to subsequent LED light beads 100.

[0030] For each LED light bead 100, the data signal enters the first signal input pin P1 of the LED driver chip through the first signal input port DI, flows through the first signal output pin M1 of the LED driver chip 10 to the first signal output port DO, and then passes through the first signal input port DI of the next LED light bead 100 to enter the next LED light bead 100, thus completing serial communication. Alternatively, the data signal enters the second signal input pin P2 of the LED driver chip through the second signal input port FDI of the LED light bead 100, flows through the second signal output pin M2 of the LED driver chip to the second signal output port FDO, and then passes through the second signal input port FDI of the next LED light bead 100 to enter the next LED light bead 100, thus completing serial communication. From the above, it can be seen that because the above two transmission lines both pass through the LED driver chip 10, if a failure occurs in the LED driver chip 10 or in the LED light bead 100, the data signal cannot be transmitted to the subsequent light bead.

[0031] In order to improve the fault tolerance of data signal transmission between LED light beads 100, in this embodiment of the present application, a first breakpoint transmission resumption line is added between the first signal input port DI and the second signal output port FDO of the LED light bead 100. That is, the first signal input port DI and the second signal output port FDO are electrically connected directly, bypassing (or bypassing) the LED driving chip 10. For example, the first signal input port DI and the second signal output port FDO may be electrically connected directly via an electrical wire. Alternatively, a wire (or wiring) may be added between the first signal input port DI and the second signal output port FDO on the PCB board on which the LED light bead 100 is located, without passing through the LED driving chip, and the first signal input port DI and the second signal output port FDO are electrically connected directly by this wire, thereby forming a first breakpoint transmission resumption line between the first signal input port DI and the second signal output port FDO.

[0032] When the first breakpoint transmission resume line is added, if a fault occurs in the LED driver chip 10 of the LED light bead 100 (or if a fault occurs in the LED light bead 100), the first signal input port DI of the LED light bead 100 → the first signal input pin P1 of the LED driver chip → the first signal output pin M1 → the first signal output port DO of the LED light bead 100, and the second signal input port FDI of the LED light bead 100 → the second signal input pin P2 of the LED driver chip → the second signal output pin M2 → the second signal output port DO of the LED light bead 100. However, if a failure occurs in a single LED light bead 100 or driver chip, the data signal transmission to the subsequent LED light bead 100 cannot be continued through the two transmission lines, namely the first signal input port DI and the second signal output port FDO. However, the data signal can be transmitted to the subsequent LED light bead 100 through the first breakpoint transmission resume line (if the LED driver chip is skipped) between the first signal input port DI and the second signal output port FDO of the LED light bead 100. This ensures stable operation of the entire LED string and reduces the risk of the entire LED string becoming inoperable due to a failure in a single LED light bead 100 or driver chip.

[0033] FIG. 1b is a structural schematic diagram of another LED light bead 100 according to an exemplary embodiment of the present application. As shown in FIG. 1b, the LED light bead 100 further includes a power input port Vin and a power output port Vout. The power input port Vin and the power output port Vout of the LED light bead 100 are electrically connected to the power input pin V1 and the power output pin V2 of the LED driver chip 10, respectively, so that the LED driver chip 10 supplies a power signal to the LED light unit 20. Furthermore, the power output port Vout of the current LED light bead 100 is electrically connected to the power input port Vin of the next LED light bead 100, thereby forming a serial power supply line between adjacent LED light beads 100. This serial power supply line allows the same power supply to power multiple serially connected LED light beads 100. The voltage from the power supply is distributed among the multiple LED light beads 100, which fully utilizes the power supply's resources and contributes to reducing the power supply's energy consumption. Preferably, if the loads of the multiple LED light beads 100 are the same, the multiple LED light beads 100 can equally divide the voltage signal from the power supply. For example, if the power supply voltage is 20V and the voltage of each LED light bead 100 is 5V, five LED light beads 100 can be connected in series.

[0034] Based on the LED light bead 100 shown in FIG. 1a or 1b, an embodiment of the present application also provides an LED string. FIG. 2a is a structural diagram of an example of an LED string according to an exemplary embodiment of the present application. As shown in FIG. 2a, the LED string includes a plurality of LED light beads 100 connected in series, where the serial connection includes serial transmission of data signals and serial transmission of power signals. The number of LED light beads 100 included in the LED string is not limited and may be, for example, 10, 30, 50, or 100, depending on the application scenario or the size of the display screen. In the embodiment of the present application, the LED string in FIG. 2a includes, but is not limited to, 11 LED light beads 100. The mounting structure of each LED light bead 100 is as shown in FIG. 1a or 1b. Specifically, each LED light bead 100 has a first signal input port, a first signal output port, a second signal input port, and a second signal output port. An LED driving chip and an LED light emitting unit are packaged inside the LED light bead 100. In an LED string, the first and second signal input ports of the first LED light bead 100 are responsible for receiving data signals from the controller. When data signals are output from the controller, the first and / or second signal input ports of the first LED light bead 100 receive these data signals, and then the first and / or second signal output ports of the first LED light bead 100 transmit these signals to the next LED light bead 100. This serial connection method ensures that data signals are transmitted in sequence from one LED light bead 100 to the next, up to the last light bead in the LED string.

[0035] In this embodiment, each LED light bead 100 in the LED string has two signal input ports (DI and FDI) and two signal output ports (DO and FDO). An LED driver chip and an LED light-emitting unit are packaged inside each LED light bead 100. The first signal input port (DI) and the second signal output port (FDO) of each LED light bead 100 are directly electrically connected, forming a path called a "first breakpoint transmission resume line." When the LED driver chip operates normally, a data signal enters the LED light bead 100 via DI or FDI, is processed by the LED driver chip, and then transmitted to the next light bead via DO or FDO. However, if a failure occurs in the LED driver chip, the data signal cannot be output via DO or FDO. In this case, because DI and FDO are directly electrically connected, the data signal can be transmitted from DI to the next LED light bead 100 via FDO, bypassing the failed LED driver chip. In this way, even if the LED driver chip of a particular LED light bead 100 fails, the transmission of the data signal to the next LED light bead 100 can continue, and data transmission can continue throughout the entire LED string.

[0036] Furthermore, the power signal from the controller is received by the power input terminal Vin of each LED light bead 100 and transmitted to the power input port Vin of the next LED light bead 100 via the power output port Vout, thereby achieving a serial connection of the power signal. This design ensures that the power supply from the power terminal to each LED light bead 100 is continuous and stable.

[0037] 2b is a structural schematic diagram of another LED string according to an exemplary embodiment of the present application. In FIG. 2b, based on the LED string shown in FIG. 2a, the second signal output port of the first LED light bead 100 in the LED string is electrically connected to the second signal input port of the second LED light bead 100, forming a second breakpoint transmission resume line. In this way, even if two or more consecutive LED light beads 100 between the first and second LED light bead 100 fail, data signal transmission to the second and subsequent LED light beads 100 can be continued. The first LED light bead 100 is any one of the LED light beads 100 in the LED string, and the second LED light bead 100 and the first LED light bead 100 are spaced apart by at least two LED light beads 100.

[0038] For ease of explanation, the first LED light bead 100 and the second LED light bead 100 form a single light bead group, and the first LED light bead 100 and the second LED light bead 100 of a single light bead group are spaced apart by at least two LED light beads 100, and may be spaced apart by, for example, two, three, four or more LED light beads 100. Figure 2b illustrates, but is not limited to, a case where the first LED light bead 100 and the second LED light bead 100 are spaced apart by two LED light beads 100.

[0039] An LED string may have one or more groups of light beads, and when an LED string has multiple groups of light beads, different groups of light beads have different first and second LED light beads 100. If a failure occurs in two or more consecutive LED light beads 100 between the first and second LED light beads 100, the failed LED light beads 100 cannot transmit data signals backward through the serial transmission line to the next LED light bead 100, but can transmit data signals to the next LED light bead 100 through the first breakpoint transmission resume line. Furthermore, if a failure also occurs in the next LED light bead 100, data signal transmission to subsequent LED light beads 100 cannot be continued via the first breakpoint transmission resume line of that LED light bead 100. However, due to the existence of the second breakpoint transmission resume line, the data signal can be transmitted directly from the second signal output port of the first LED light bead 100 to the second signal input port of the second LED light bead 100 via the second breakpoint transmission resume line, thereby ensuring continued data signal transmission to the second LED light bead 100 and subsequent LED light beads. Here, the second breakpoint transmission resume line can directly skip the LED light bead 100 where the failure occurred, thereby ensuring continued data signal transmission to the second LED light bead 100 and subsequent LED light beads. This allows failure of some LED light beads 100 in the LED string without causing the failure of the entire LED string, improving the performance of the LED string.

[0040] For example, for the LED light beads 100 in the first light bead group shown in Figure 2b, there are two LED light beads 100 between the first LED light bead 100 and the second LED light bead 100, and the second signal output port of the first LED light bead 100 is electrically connected to the second signal input port of the second LED light bead 100, forming a second breakpoint transmission resume line. If a failure occurs in the LED light bead 100 immediately after the first LED light bead 100, the first breakpoint transmission resume line can skip the failed LED light bead 100 and transmit data signals to the subsequent LED light bead 100. However, if a failure occurs in two consecutive LED light beads 100 after the first LED light bead 100, the data signals cannot be transmitted via the first breakpoint transmission resume line. In this case, the second breakpoint transmission resume line can bypass the two failed light beads, allowing data signals to be transmitted directly from the first LED light bead 100 to the second LED light bead 100.

[0041] In this embodiment, different light bead groups in an LED string have different first and second LED light beads 100. As shown in Figure 2b, the first and second LED light beads 100 of the first, second, and third light bead groups are all different.

[0042] In the embodiments of the present application, the positional relationship between the first LED light bead 100 of one light bead group and the second LED light bead 100 of another light bead group is not limited. In one optional embodiment, the first LED light bead 100 of the latter of two adjacent light bead groups in an LED string is the LED light bead 100 before the second LED of the former light bead group, but is different from the first LED light bead 100 of the former light bead group, thus staggering the adjacent light bead groups, which is advantageous for further reducing the impact of a failed LED light bead 100. In another optional embodiment, the first LED light bead 100 of the latter of two adjacent light bead groups in an LED string is the second LED light bead 100 of the former light bead group or a later LED light bead 100, thus staggering the adjacent light bead groups.

[0043] More preferably, when two adjacent second breakpoint transmission resume lines of an LED string are separated by only one LED light bead 100, that light bead is the second LED light bead 100 of the preceding group of adjacent light beads and also the first LED light bead 100 of the succeeding group of light beads. When two adjacent second breakpoint transmission resume lines of an LED string are separated by at least two LED light beads 100, the first LED light bead 100 of the succeeding group of adjacent light beads is the LED light bead 100 that is later than the second LED light bead 100 of the preceding group of light beads. As shown in FIG. 2b, when the second breakpoint transmission resume line of the first group of light beads and the second group of light beads are separated by only one LED light bead 100, that light bead is the second LED light bead 100 of the first group of light beads and also the first LED light bead 100 of the second group of light beads. The breakpoint transmission resume line of the second light bead group and the breakpoint transmission resume line of the third light bead group are spaced apart by two LED light beads 100, and the first LED light bead 100 of the third light bead group is one LED light bead 100 behind the second LED light bead 100 of the second light bead group.

[0044] In the present embodiment, the number of LED light beads 100 between the first LED light bead 100 and the second LED light bead 100 in different groups of LED light beads may be the same or different. In the LED light bead group, the number of LED light beads 100 between the first LED light bead 100 and the second LED light bead 100 may be adjusted according to the application scenario, including, but not limited to, the voltage demand of each LED light bead 100 or the failure probability of the LED light beads 100. For example, in an application scenario where the voltage of the LED light beads 100 in an LED string needs to be the same, the number of LED light beads 100 between the first LED light bead 100 and the second LED light bead 100 in different groups of LED light beads in the LED string is the same. In an application scenario requiring the first group of LED light beads to be high-voltage LED light beads 100 and the second group of LED light beads to be low-voltage LED light beads 100, in the first group of LED light beads, the first LED light bead 100 and the second LED light bead 100 are spaced apart by two LED light beads 100, and in the second group of light beads, the first LED light bead 100 and the second LED light bead 100 are spaced apart by five LED light beads 100, and in this case, the number of LED light beads between the first LED light bead and the second LED light bead is different in different groups of LED light beads in the LED string.

[0045] Figure 2c is a schematic diagram of the structure of yet another LED string according to an exemplary embodiment of the present application. Compared with the LED strings shown in Figures 2a and 2b, the string shown in Figure 2c shows a partial internal structure of an LED light bead 100. As shown in Figure 2c, the LED string includes multiple LED light beads 100, which are serially connected to each other. The serial connection relationship between the multiple LED light beads 100 and the data signal transmission lines are all the same as in the previous embodiment, so they will not be described in detail here. Similarly, the internal structure of each LED light bead 100 is the same as the structure of the LED light bead 100 in the previous embodiment, so they will not be described in detail here.

[0046] More preferably, in the LED string shown in FIG. 2c, the LED driving chip of the LED light bead 100 includes a monitoring circuit electrically connected to the first and second signal input pins of the LED driving chip, an analysis circuit electrically connected to the monitoring circuit, and a driving circuit electrically connected to the analysis circuit. The monitoring circuit monitors whether the first and second signal input pins receive a data signal. If the result of the monitoring is that one of the signal input pins receives a data signal, the monitoring circuit outputs the data signal and the pin identifier of the signal input pin that received the data signal to the analysis circuit.

[0047] Note that both of the two signal input pins may receive a data signal. Preferably, if two signal input pins receive data signals sequentially, the first received data signal is designated as the main pin, and the signal input pin that first receives the data signal is designated as the main pin, and the pin indicator of the main pin and the data signal received by the main pin are output to the analysis circuit, and the signal input pin that receives the data signal later is designated as the spare pin, and the data signal received by the spare pin is discarded. Alternatively, if two signal input pins receive data signals simultaneously, the first signal input pin is designated as the main pin, and the pin indicator of the main pin and the data signal received by the main pin are output to the analysis circuit, and the second signal input pin is designated as the spare pin, and the data signal received by the spare pin is discarded.

[0048] Different pin identifiers correspond to different signal input pins, and the data signals received by different signal input pins may be different, particularly related to how the data signals are processed by the LED driver chip (specifically, the driver circuit of the LED driver chip). In one optional embodiment, the LED driver chip (specifically, the driver circuit of the LED driver chip) of each LED light bead 100 analyzes the data slot required for that LED light bead 100 from the received data signal, uses that data slot to drive the LED light unit of that LED light bead 100 to emit light, and then transmits the data signals of the remaining data slots to subsequent LED light beads 100. In this embodiment, as can be seen by combining the first breakpoint transmission resume line and / or the second breakpoint transmission resume line according to the previous embodiment, the remaining data slots included in the data signals arriving at different signal input pins are different, and therefore the processing methods by the LED driver chips of subsequent LED light beads 100 are also different. Therefore, in the embodiment of the present application, there is a different analysis method for each signal input pin, and specifically, the analysis circuit uses an appropriate analysis method to analyze the data slot required for the LED light bead 100 to which the received data signal belongs.

[0049] Specifically, the analysis circuit receives the pin identifiers and data signals output by the monitoring circuit, analyzes the data signals to find data slots corresponding to the LED lighting units according to the analysis method corresponding to the pin identifiers, and outputs the data slots to the driving circuit. These data slots contain specific information on how to control the LED lighting units, such as display attributes such as brightness adjustment and color change. The driving circuit controls the display of the LED lighting units based on the data slots, causing the LED light beads 100 to light up in the expected manner.

[0050] Here, different signal pins correspond to different analysis methods. Combining the data signal processing methods in the above embodiments, if the pin identifier output by the monitoring circuit corresponds to a first signal input pin, the corresponding analysis method is to analyze the data slot required for that LED light bead 100 from the corresponding position in the received data signal according to the serial connection order of the LED light beads 100. If the pin identifier output by the monitoring circuit corresponds to a second signal input pin, the corresponding analysis method is to analyze the data slot required for that LED light bead 100 from the corresponding position in the received data signal according to the serial connection order of the LED light beads 100. In addition, other data slots preceding the data slot may be deleted (these data slots correspond to faulty LED light beads 100 and are therefore invalid data slots) to reduce the amount of data transmitted later and save transmission and processing resources. Note that the data signal processing method and the corresponding analysis method used by the LED driving chip are merely illustrative and not limiting, and the embodiments of the present application are not limited thereto.

[0051] In this embodiment, the LED driving chip includes three parts: a monitoring circuit, an analysis circuit, and a driving circuit. The monitoring circuit ensures that data signals input from any pin are accurately recognized and transmitted. The analysis circuit processes the data according to a specific analysis method for each pin to ensure accurate extraction of data slots. The driving circuit accurately controls the LED lighting units based on the analyzed data slots to achieve the expected display effect. This process, as a whole, continuously monitors, analyzes, and ultimately controls the signals, allowing the same LED driving chip to flexibly control the LED lighting units based on various input signals. This ensures the accuracy and efficiency of signal processing while improving the flexibility and expressiveness of LED string control.

[0052] In practical applications, the power supply to the LED light beads 100 of multiple LED strips may be controlled by a controller. When controlling the power supply, multiple LED light beads 100 of the same LED strip can be powered in parallel using a voltage-regulated power supply, thereby reducing the mutual influence between the LED light beads 100. While this parallel power supply method ensures consistent brightness among all LED lights and allows the remaining light beads to operate normally even if one light bead fails, it does have some drawbacks. For example, to ensure the safety of the LED light beads 100, a current-limiting resistor must be placed on each LED light bead 100 to limit the current. These resistors can generate heat and consume energy, which increases the energy consumption of the LED light beads 100, especially when the number of LED light beads 100 is large.

[0053] To solve the above problems, the present embodiment also provides an LED string using a serial power supply. As shown in FIG. 2d, in an LED string using the serial power supply, the LED light beads 100 in the LED string are on the same serial power supply line and are collectively powered by the same power supply. Each LED light bead 100 has the same current, ensuring consistent brightness for each LED and avoiding brightness variations caused by current differences. Furthermore, the serial power supply eliminates the need for individual current-limiting resistors for each LED light bead 100, thereby reducing the energy consumption of these resistors. This significantly reduces energy consumption, especially when there are many LED light beads 100. Furthermore, compared to the parallel power supply, the serial power supply allows a single constant current source to power the entire LED string, which is advantageous for reducing the complexity of the driver chip. Furthermore, compared with the parallel power supply method, in the series connection power supply method, each LED light bead 100 receives a relatively small current, so the heat generated by a single LED is reduced, which not only reduces energy consumption but also contributes to extending the life of the LED.

[0054] In the serial power supply method, all of the LED light beads 100 in the LED string have a power input port Vin and a power output port Vout. The power input port Vin and power output port Vout of each LED light bead 100 are electrically connected to the power input pin V1 and power output pin V2 of the internal LED driver chip, respectively, so that the LED driver chip supplies a power signal to the LED light-emitting unit. Among adjacent LED light beads 100, the power output port Vout of the previous LED light bead 100 is electrically connected to the power input port Vin of the next LED light bead 100, forming a serial power supply line. The power input port Vin of the first LED light bead 100 in the LED string is electrically connected to the power supply terminal, and the power output port Vout of the last LED light bead 100 in the LED string is electrically connected to the ground terminal.

[0055] Furthermore, embodiments of the present application also provide an LED panel including the above-described LED light bead 100 or LED string. FIG. 3a is a structural schematic diagram of an example of a serially powered LED panel according to an exemplary embodiment of the present application. As shown in FIG. 3a, the LED panel includes multiple LED strings. The number of strings included in the LED panel is not limited and may be, for example, 2, 5, 6, 10, 20, or 30. Of course, it may be more or less than these numbers, specifically depending on the application scenario and the size of the display space. For example, FIGS. 3a to 3b and 4a to 4d all illustrate that each LED panel includes four LED strings, but this is not limiting. Each LED string of the LED panel has the same structure as the LED string shown in FIG. 2a, 2b, 2c, or 2d, and therefore will not be described in detail here. In an optional embodiment, the data signal in the LED panel may be supplied by a controller. The controller includes a plurality of communication ports, which are respectively connected to the first and second signal input ports of the first LED light beads 100 of the plurality of LED strings and can be used to supply data signals to the LED strings. The mounting structure of the controller is not the focus of the embodiments of the present application, and any controller structure that can supply data signals to the LED panel can be applied to the embodiments of the present application. In the embodiments of the present application, the location of the controller is not limited, and can be at the top or bottom of the display screen where the LED panel is located, or controllers can be provided at both the top and bottom of the LED display screen where the LED panel is located.

[0056] More preferably, as shown in Figure 3a, the LED panel further includes a power supply terminal and a ground terminal, where the power supply terminal can be understood as a power supply, and the ground terminal can be understood as a ground signal, and are used to supply power to the LED strings of the LED panel. Accordingly, each LED light bead 100 of the LED panel is also provided with a power input port Vin and a power output port Vout. The power input port Vin of the first LED light bead 100 of the multiple LED strings of the LED panel is connected in parallel to the power supply terminal, and the power output port Vout of the last LED light bead 100 of the multiple LED strings is connected in parallel to the ground terminal, and the LED light beads 100 of the same LED string are on the same serial power supply line and are powered by the power supply terminal of the controller.

[0057] Furthermore, the power input port Vin and power output port Vout of each LED light bead 100 are electrically connected to the power input pin V1 and power output pin V2 of the internal LED driver chip, respectively, so that the LED driver chip supplies power signals to the LED light units. Among adjacent LED light beads 100 in the same LED string, the power output port Vout of the previous LED light bead 100 is electrically connected to the power input port Vin of the next LED light bead 100, forming a serial power supply line.

[0058] In this embodiment, the LED light bead 100 can receive a power signal in addition to a data signal. The power signal may be provided by a controller, which is electrically connected to the power supply terminal VCC and the ground terminal GND shown in FIG. 3a and supplies the power signal to the LED strings of the LED panel. More preferably, the controller may be electrically connected to the power supply terminal and the ground terminal directly or via a connector or other intermediate circuit, but this is not limited thereto. Each LED light bead 100 has a power input port Vin and a power output port Vout, which are electrically connected to the power input pin V1 and the power output pin V2 of the LED driver chip inside the LED light bead 100. In this connection, the LED driver chip receives the power signal from the power input port Vin and transmits it to the LED light units to drive the LED light units for display.

[0059] In the same LED string, adjacent LED light beads 100 are electrically connected by their power input port Vin and power output port Vout, i.e., the power output port Vout of the previous LED light bead 100 is electrically connected to the power input port Vin of the next adjacent LED light bead 100, forming a serial power supply line. This serial connection method ensures that the power signal is transmitted sequentially along the LED string.

[0060] Furthermore, the power input ports Vin of the first ED light bead 100 of the multiple LED strings in the LED panel are connected in parallel to the power supply terminal, i.e., all LED strings receive power directly from the power supply terminal. Similarly, the power output ports Vout of the last LED light bead 100 of the multiple LED strings are connected in parallel to the ground terminal, thereby ensuring that the ends of all LED strings are properly grounded. The parallel connection to the power supply terminal and the ground terminal ensures a stable power supply for each LED string, while the serial power supply line ensures the continuity of the power signal throughout the LED strings.

[0061] More preferably, in the embodiment of the present application, the LED panel arrangement is not limited to a matrix arrangement. For example, in a matrix arrangement, the LED strings are configured as multiple rows and columns, with one LED string being a row, and LED light beads 100 at the same position in different LED strings being a column. The first LED light bead 100 in each row receives a data signal and a power signal, which are then transmitted to the subsequent LED strings via a serial connection.

[0062] Also, for example, in a matrix arrangement as shown in FIG. 3a, the LED strings are configured as multiple rows and columns, each LED string is a column, the LED light beads 100 at corresponding positions in each LED string are a row of LED light beads 100, and the first LED light bead 100 in each column receives a data signal and a power signal, which are then transmitted to the subsequent LED strings via a serial connection.

[0063] In any of the above arrangements, each LED light bead 100 can obtain the necessary data and power signals through the serial power supply line, and the arrangement to be selected depends on the needs and design preferences of the specific application.

[0064] More preferably, in the embodiment of the present application, the serial power supply lines between adjacent LED strings in the LED panel are connected in parallel to form parallel power supply lines.

[0065] The LED light beads 100 of multiple LED strings in the LED panel are arranged in a matrix, with the LED light beads 100 of the same LED string in the same column and the LED light beads 100 of different LED strings in the same row, and the serial power supply lines between the LED light beads 100 of two adjacent rows are connected in parallel to form a parallel power supply line. Alternatively, the LED light beads 100 of multiple LED strings are arranged in a matrix, with the LED light beads 100 of the same LED string in the same row and the LED light beads 100 of different LED strings in the same column, and the serial power supply lines between the LED light beads 100 of two adjacent rows are connected in parallel to form a parallel power supply line.

[0066] The embodiments of the present application are not limited to a configuration in which serial power supply lines are connected in parallel, but for example, each serial power supply line may be connected together via an electric wire to form a parallel power supply line.

[0067] 3b is a structural schematic diagram of an example of a serial-parallel powered LED panel according to an exemplary embodiment of the present application. In FIG. 3b, each LED string of the LED panel has the same internal structure as the LED string in FIG. 3a. VCC and GND have the same meanings in FIG. 3b and FIG. 3a, and therefore will not be described in detail here. As shown in FIG. 3b, each LED string of the LED panel includes multiple LED light beads 100, and these light beads are in the same column. LED light beads 100 at the same position in different LED strings (i.e., different columns) are in the same row, and each row includes light beads from different LED strings. The serial power supply lines between the LED light beads 100 in two adjacent rows are connected in parallel to form a parallel power supply line. Preferably, the serial power supply lines between the LED light beads 100 in two adjacent rows may be directly connected via electrical wires or may adopt other connection methods, but this is not limited thereto. This connection method allows parallel transmission of power signals between different columns while ensuring that the LED light beads 100 in each row receive a stable power supply. For example, the LED light beads 100 in a specific column in a previous row can supply power in parallel to the LED light beads 100 in each column in the next row, which is equivalent to the LEDs in the previous row in the same column supplying power in series to the LED light beads 100 in the next row, thereby realizing a serial-parallel hybrid power supply method. The parallel power supply method is used to solve the problem of subsequent LED light beads 100 not being able to obtain power signals due to a failure of a specific LED light bead 100 in the serial power supply line. Alternatively, the multiple LED light beads 100 included in each LED string of the LED panel are in the same row, with one row representing one LED string, and the LED light beads 100 at the same position in different LED strings (i.e., different rows) are in the same column, with each column including LED light beads 100 of different LED strings, and the serial power supply lines between the LED light beads 100 in two adjacent columns are connected in parallel to form a parallel power supply line.This connection method allows parallel transmission of power signals between different columns while ensuring that each column of LED light beads 100 receives a stable power supply, thereby realizing a serial-parallel hybrid power supply method, which is used to solve the problem that a failure of a specific LED light bead 100 in the serial power supply line prevents subsequent LED light beads 100 from receiving power signals.

[0068] Furthermore, in the serial-parallel hybrid power supply method, considering that each LED light bead 100 receives both a power signal from the serial power supply line and a power signal from the parallel power supply line, in the embodiment of the present application, each LED light bead 100 of the LED panel further includes a power gate circuit arranged between the power input port Vin and the power input pin V1, and the power gate circuit is used to select the power signal to be finally used from the serial power supply line and the parallel power supply line.

[0069] Specifically, the power gate circuit detects whether power signals are received from the serial power supply line and the parallel power supply line. If it detects that power signals are present 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 V1, giving priority to the serial power supply method (i.e., the serial power supply line is used preferentially as the main power supply path, thereby fully demonstrating the advantages of the serial power supply method). Alternatively, if it detects that a power signal is present on one of the serial power supply line and the parallel power supply line but not on the other, it connects the power supply line with a power signal to the power input pin V1, giving priority to power supply to the LED light bead 100.

[0070] Furthermore, if the serial power supply line loses power due to a failure of the previous LED light bead 100, the parallel power supply line acts as a spare path to supply power to the subsequent LED light beads 100 in a timely manner, ensuring the normal operation of the subsequent LED light beads 100. This circuit design ensures high reliability and flexibility of the power supply for the LED light beads 100, and the serial power supply line, as the main power supply path, can reduce energy consumption, ensure consistent brightness of the LED light beads 100, and simplify the circuitry of the driver chip. The parallel power supply line, as a spare power supply path, ensures that the subsequent LED light beads 100 can receive power signals and operate normally even if a problem occurs in the main path.

[0071] In the present embodiment, the power gating circuit contained within each LED light bead 100 of the LED panel may be implemented using, but is not limited to, a relay or an electronic switch.

[0072] Furthermore, an embodiment of the present application also provides an LED display screen of the LED panel shown in FIG. 3a or 3b. The LED display screen according to the embodiment of the present application includes a controller and at least two LED panels, which are joined in sequence to form an LED display screen, and the controller is provided on the top and / or bottom of the LED display screen. That is, the LED display screen may have a controller provided on the top, bottom, or both the top and bottom. The controller is responsible for driving an LED string of a predetermined length, and this length is not particularly limited. For example, it can drive strings of 5 m, 6 m, or 8 m in length. However, these numbers are merely examples, and the length of the LED string that each controller can drive may be longer or shorter. If one controller is used, it can be located at the top or bottom of the LED display screen. If multiple LED panels need to be driven, two controllers can be used, one at the top and one at the bottom of the display screen. This arrangement ensures that the center of the LED display screen is not obstructed by the controller, meeting the transparency requirements of the display screen, allowing the LED display screen to be realized as a transparent screen. If the controller is located at the top of the display screen, or if two controllers are present (one at the top and one at the bottom), the display screen can be designed as a suspended screen. This configuration is suitable for high-ceiling locations such as exhibition halls, theaters, and large conference rooms, providing flexible installation options. If the controller is located only at the bottom of the display screen, there is usually a base to support the entire display screen, allowing the display screen to stand on the ground. This method is suitable for situations that require suspension, such as shop windows and small exhibition spaces.Preferably, the controller and the LED panel can be electrically connected directly or by a specialized connector, which not only ensures the reliability of the electrical connection but also makes installation and maintenance convenient.

[0073] In the present embodiment, the number of LED panels included in the LED display screen is not limited and may be, for example, 2, 3, 4, 5, 10, or 30, etc., and is specifically determined according to the application scenario and the size of the display space. For example, FIG. 4a illustrates three LED panels A, B, and C, FIG. 4b illustrates three LED panels D, E, and F, FIG. 4c illustrates three LED panels G, H, and I, and FIG. 4d illustrates three LED panels J, K, and L. The LED panels included in the LED display screen may be the same or different LED panels, where "same" here means that the structure, type, size, and power supply method of the LED panels are all the same. Therefore, different LED panels mean that at least one of the structure, type, size, and power supply method of the LED panels is different. Due to this flexibility, the LED display screen can use the same or different LED panels to meet various display needs or application scenarios. Preferably, the LED display screens shown in Figures 4a to 4d use the same LED panels. The LED display screens shown in Figures 4a to 4d have different numbers and locations of controllers, and different signal flow directions and power supply methods for some LED panels. For details, please refer to the following examples.

[0074] In the LED display screen, the signal flow directions in at least two LED panels are the same, or the signal flow directions of at least some of the adjacent LED panels among the at least two LED panels are opposite. For example, the signal flow direction of the last LED panel among the at least two LED panels is opposite to the signal flow directions of the other LED panels. Here, the signal flow directions include the flow directions of data signals and power signals, and for one LED panel, the signal flow direction may be from top to bottom, bottom to top, left to right, or right to left.

[0075] In the embodiments of the present application, the power supply method for each LED panel constituting the LED display screen is not limited. Preferably, the power supply method for each LED panel constituting the LED display screen may be serial power supply. More preferably, the power supply method for each LED panel of the LED display screen may be such that serial power supply lines between adjacent LED strings in the LED panel are connected in parallel to form parallel power supply lines, and power is supplied to the LED display screen in a serial-parallel power supply method. Preferably, the power supply method for each LED panel of the LED display screen may be such that some LED panels are serial power supply and the remaining LED panels are serial-parallel power supply.

[0076] FIG. 4a is a structural schematic diagram of an example of an LED display screen according to an exemplary embodiment of the present application. As shown in FIG. 4a, the LED display screen is composed of three LED panels A to C. In FIG. 4a, each LED string in each LED panel has the same internal structure as the LED string in FIG. 3a. The VCC and GND have the same meanings in FIG. 4a and FIG. 3a, and therefore will not be described in detail here. The LED panels are serially powered, and the three LED panels are joined together to form a complete LED display screen. In the LED display screen shown in FIG. 4a, the controller is located at the top of the LED display screen, and the signal flow direction of the three LED panels A to C is the same, i.e., from top to bottom, so that the signal transmission direction of the entire LED display screen is consistent.

[0077] FIG. 4b is a structural schematic diagram of another LED display screen according to an exemplary embodiment of the present application. As shown in FIG. 4b, the LED display screen is composed of three LED panels D to F. Each LED string in each LED panel has the same internal structure as the LED string in FIG. 3a. The VCC and GND have the same meanings in FIG. 4b and FIG. 3a, and therefore will not be described in detail here. In these LED panels, the serial power supply lines are connected to form parallel power lines based on the serial power supply scheme shown in FIG. 4a. The LED display screen is powered by a serial-parallel power supply scheme, and the three LED panels D to F are joined together to form a complete LED display screen. In the LED display screen shown in FIG. 4b, the controller is installed on the top of the LED display screen, and the signal flow direction of the LED panels D to F is the same, i.e., from top to bottom, so that the signal transmission direction of the entire LED display screen is consistent.

[0078] FIG. 4c is a structural schematic diagram of yet another LED display screen according to an exemplary embodiment of the present application. As shown in FIG. 4c, the LED display screen is composed of three LED panels G to I. Each LED string in each LED panel has the same internal structure as the LED string in FIG. 3a. The VCC and GND have the same meanings in FIG. 4c and FIG. 3a, and therefore will not be described in detail here. The power supply method for LED panels G and I is serial, and the power supply method for LED panel H is serial-parallel. These three LED panels D to F are joined together to form a complete LED display screen. In the LED display screen shown in FIG. 4c, the controller is located at the top of the LED display screen, and the signal flow direction of LED panels G to I is the same, i.e., from top to bottom, so that the signal transmission direction of the entire LED display screen is consistent.

[0079] FIG. 4d is a structural schematic diagram of yet another LED display screen according to an exemplary embodiment of the present application. As shown in FIG. 4d, the LED display screen is composed of three LED panels J to L. Each LED string in each LED panel has the same internal structure as the LED string in FIG. 3a. The VCC and GND have the same meanings in FIG. 4d and FIG. 3a, and therefore will not be described in detail here. The LED panels are powered by a serial-parallel power supply, and the three LED panels J to L are joined together to form a complete LED display screen. The LED display screen shown in FIG. 4d includes two controllers, one at the top and one at the bottom of the LED display screen. The signal flow directions of LED panels J and K are the same, i.e., from top to bottom, while the signal flow direction of the last LED panel L is opposite, from bottom to top. This avoids occlusion of the controllers in the LED display screen.

[0080] In the above embodiment, the LED panel has breakpoint transmission restart as its main structural feature, and the power supply method can be serial power supply or serial-parallel power supply. In addition, in the parallel power supply method, in order to ensure the safety of the LED light beads, a current-limiting resistor must be placed on each LED light bead to limit the current. However, these resistors generate heat and consume energy, and the energy consumption also increases, especially when the number of LED light beads is large. In response to this problem, the embodiment of the present application also provides another LED panel, which has serial-parallel power supply as its main structural feature, and is not limited as to whether it supports breakpoint transmission restart.

[0081] Specifically, another LED panel according to an embodiment of the present application includes multiple LED strings, each LED string including multiple LED light beads, each LED light bead having a power input port and a power output port, an LED driving chip and an LED light unit packaged inside the LED light bead, the power input port and the power output port of each LED light bead are electrically connected to the power input pin and the power output pin of the LED driving chip inside it, respectively, so that the LED driving chip supplies a power signal to the LED light unit, and in the same LED string, the power output port and the power input port of adjacent LED light beads 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.

[0082] In one optional embodiment, the LED light beads of the plurality of LED strings are arranged in a matrix, with the LED light beads of the same LED string in the same column and the LED light beads of different LED strings at the same position in the same row, and the serial power supply lines between the LED light beads of two adjacent rows are connected in parallel to form a parallel power supply line; or the LED light beads of the plurality of LED strings are arranged in a matrix, with the LED light beads of the same LED string in the same row and the LED light beads of different LED strings at the same position in the same column, and the serial power supply lines between the LED light beads of two adjacent rows are connected in parallel to form a parallel power supply line.

[0083] More preferably, each LED light bead further includes a power gate circuit provided between the power input port and the power input pin, and when detecting that a power signal exists on both the serial power supply line and the parallel power supply line, the power gate circuit connects the serial power supply line to the power input pin, or when detecting that a power signal exists on one of the serial power supply line and the parallel power supply line but not on the other, the power gate circuit salary A power line is connected to the power input pin.

[0084] The detailed description of the LED panel structure, LED string structure, serial-parallel power supply line structure, power gate circuit structure, etc. can be referred to the previous embodiments, and will not be described in detail here. Furthermore, the LED panel according to this embodiment introduces a structural feature of breakpoint transmission restart to obtain the LED panel shown in Figure 3b, and the detailed description of this LED panel can be referred to the previous embodiments, and will not be described in detail here.

[0085] In the embodiment of the present application, the LED panel adopts a serial-parallel hybrid power supply method, which can reduce energy consumption and solve the problem of serial power supply method in which a failure in a specific LED light bead causes the power supply to subsequent LED light beads to be cut off. This reduces the number of LED light beads whose power supply is cut off as much as possible, reduces the number of LED light beads that cause the entire LED display screen to become inoperable, and improves the reliability of the LED display screen.

[0086] In the above embodiment, the LED display screen has a breakpoint transmission restart as its main structural feature, and can use serial power supply or serial-parallel power supply as its power supply method. In addition, in the parallel power supply method, in order to ensure the safety of the LED light beads, a current-limiting resistor needs to be placed on each LED light bead to limit the current. However, these resistors generate heat and consume energy, and the energy consumption also increases especially when the number of LED light beads is large. In response to this problem, the embodiment of the present application also provides another LED display screen, which has a serial-parallel power supply as its main structural feature, and is not limited to whether it supports breakpoint transmission restart.

[0087] Specifically, another LED display screen according to an embodiment of the present application includes a controller and at least two LED panels, each LED panel including a plurality of LED strings, each LED string including a plurality of LED light beads, each LED light bead having a power input port and a power output port, and an LED driving chip and an LED light unit packaged inside the LED light bead. The controller is electrically connected to the power input port of the first LED light bead of each LED string and the power output port of the last LED light bead, and is used to supply power signals to the LED light beads. The power input port and power output port of each LED light bead are electrically connected to the power input pin and power output pin of the LED driving chip inside it, respectively, so that the LED driving chip supplies power signals to the LED light unit. In each LED panel, the power input ports and power output ports of adjacent LED light beads of 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.

[0088] In one optional embodiment, in the LED panel, the LED light beads of the plurality of LED strings are arranged in a matrix, with the LED light beads of the same LED string in the same column and the LED light beads at the same position in different LED strings in the same row, and the serial power supply lines between the LED light beads in two adjacent rows are connected in parallel to form a parallel power supply line; or in the LED panel, the LED light beads of the plurality of LED strings are arranged in a matrix, with the LED light beads of the same LED string in the same row and the LED light beads at the same position in different LED strings in the same column, and the serial power supply lines between the LED light beads in two adjacent rows are connected in parallel to form a parallel power supply line.

[0089] In one optional embodiment, in the LED panel, each LED light bead further includes a power gate circuit disposed between the power input port and the power input pin, and the power gate circuit conducts the serial power supply line to the power input pin when detecting that a power signal exists on both the serial power supply line and the parallel power supply line, or detects that a power signal exists on one of the serial power supply line and the parallel power supply line but not on the other, and salary A power line is connected to the power input pin.

[0090] For detailed descriptions of the LED display screen structure, LED panel structure, serial-parallel power supply line, power gate circuit, LED light beads, etc., please refer to the above-mentioned embodiments, and therefore will not be described in detail here. Furthermore, the LED panel included in the LED display screen introduces a structural feature of breakpoint transmission resume, thereby obtaining the LED display screen shown in Figure 4b or 4d, and for detailed descriptions of the LED display screen shown in Figure 4b or 4d, please refer to the above-mentioned embodiments.

[0091] The embodiments of the present application provide an LED display screen that adopts a serial-parallel hybrid power supply method, which can reduce energy consumption and solve the problem of serial power supply method in which a failure in a specific LED light bead causes the power supply to subsequent LED light beads to be cut off. This reduces the number of LED light beads whose power supply is cut off as much as possible, reducing the number of LED light beads that cause the entire LED display screen to become inoperable, and improving the reliability of the LED display screen.

[0092] Note that the terms "first", "second", etc. used in this specification are intended to distinguish between different messages, devices, modules, etc., and do not indicate a sequential order, and do not necessarily mean that "first" and "second" are of different types.

[0093] It should be noted that the terms "comprise," "include," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or device that includes a set of elements includes not only those elements but also other elements not expressly listed or that are inherent in such process, method, article, or device. Unless further limited, an element qualified by the phrase "comprises" does not exclude the presence of other identical elements in the process, method, article, or device that includes that element.

[0094] The above is merely an example of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. An LED string includes a plurality of serially connected LED light beads, each of which has a first signal input port, a first signal output port, a second signal input port, and a second signal output port, and each of which has an LED driving chip and an LED light emitting unit packaged therein; The first signal input port, the second signal input port, the first signal output port, and the second signal output port of each LED light bead are electrically connected to the first signal input pin, the second signal input pin, the first signal output pin, and the second signal output pin of the LED driving chip therein, respectively, so that a data signal is transmitted to the LED light emitting unit via any signal input pin of the LED driving chip; The first signal output port and the second signal output port of the adjacent LED light beads are electrically connected to the first signal input port and the second signal input port, respectively, to form a serial signal line; The serial signal line is used to transmit data signals to subsequent LED light beads when there is no fault in the LED light bead or the internal LED driving chip; and The first signal input port and the second signal output port of each LED light bead are directly electrically connected to each other, bypassing the LED driving chip therein, to form a first breakpoint transmission resume line; The first breakpoint transmission resume line is used to continuously transmit data signals to the subsequent LED light bead when a failure occurs in the LED light bead or the internal LED driving chip; An LED string comprising:

2. The second signal output port of the first LED light bead is electrically connected to the second signal input port of the second LED light bead, forming a second breakpoint transmission resume line; 2. The LED string of claim 1, wherein the first LED light bead is any one of the LED light beads in the LED string, and the second LED light bead and the first LED light bead are spaced apart by at least two LED light beads.

3. 3. The LED string of claim 2, wherein the first LED light bead and the second LED light bead form one light bead group, and the LED string has a plurality of light bead groups, and different light bead groups have different first LED light beads and second LED light beads.

4. the LED driving chip includes: a monitoring circuit electrically connected to the first signal input pin and the second signal input pin; an analyzing circuit electrically connected to the monitoring circuit; and a driving circuit electrically connected to the analyzing circuit; 3. The LED string of claim 2, wherein when any of the signal input pins receives a data signal, the monitoring circuit outputs the data signal and a pin identifier of the any of the signal input pins to the analysis circuit, the analysis circuit analyzes a data slot corresponding to the LED light-emitting unit from the data signal according to an analysis method corresponding to the pin identifier, and outputs the data slot to the driving circuit, and the driving circuit controls the display of the LED light-emitting unit based on the data slot, and different signal pins correspond to different analysis methods.

5. Each LED light bead is further provided with a power input port and a power output port; The power input port and the power output port of each LED light bead are electrically connected to the power input pin and the power output pin of the LED driving chip inside, respectively, so that the LED driving chip provides a power signal to the LED light emitting unit; The power output port and the power input port of the adjacent LED light beads are electrically connected to form a serial power supply line; 5. The LED string according to claim 1, wherein a power input port of a first LED light bead of the LED string is electrically connected to a power supply terminal, and a power output port of a last LED light bead of the LED string is electrically connected to a ground terminal.

6. An LED panel, comprising: a plurality of LED strings, each of the LED strings comprising a plurality of LED light beads, each of the LED light beads having a first signal input port, a first signal output port, a second signal input port, and a second signal output port, each of the LED light beads having an LED driving chip and an LED light emitting unit packaged therein; The first signal input port, the second signal input port, the first signal output port, and the second signal output port of each LED light bead are electrically connected to the first signal input pin, the second signal input pin, the first signal output pin, and the second signal output pin of the LED driving chip therein, respectively, so that a data signal is transmitted to the LED light emitting unit via any signal input pin of the LED driving chip; The first signal output port and the second signal output port of the adjacent LED light beads are electrically connected to the first signal input port and the second signal input port, respectively, to form a serial signal line; The serial signal line is used to transmit data signals to subsequent LED light beads when there is no fault in the LED light bead or the internal LED driving chip; and The first signal input port and the second signal output port of each LED light bead are directly electrically connected to each other, bypassing the LED driving chip therein, to form a first breakpoint transmission resume line; The first breakpoint transmission resume line is used to continuously transmit a data signal to a subsequent LED light bead when a failure occurs in the LED light bead or the internal LED driving chip.

7. The second signal output port of the first LED light bead is electrically connected to the second signal input port of the second LED light bead, forming a second breakpoint transmission resume line; 7. The LED panel of claim 6, wherein the first LED light bead is an LED light bead of any one of the LED strings, and the second LED light bead and the first LED light bead are spaced apart by at least two LED light beads.

8. 8. The LED panel of claim 7, wherein the first LED light bead and the second LED light bead form one light bead group, and the LED string has a plurality of light bead groups, and different light bead groups have different first LED light beads and second LED light beads.

9. the LED driving chip includes: a monitoring circuit electrically connected to the first signal input pin and the second signal input pin; an analyzing circuit electrically connected to the monitoring circuit; and a driving circuit electrically connected to the analyzing circuit; 8. The LED panel according to claim 7, wherein when any of the signal input pins receives a data signal, the monitoring circuit outputs the data signal and a pin identifier of the any of the signal input pins to the analysis circuit, the analysis circuit analyzes a data slot corresponding to the LED light-emitting unit from the data signal according to an analysis method corresponding to the pin identifier, and outputs the data slot to the driving circuit, and the driving circuit controls the display of the LED light-emitting unit based on the data slot, and different signal pins correspond to different analysis methods.

10. Each LED light bead is further provided with a power input port and a power output port; The power input port and the power output port of each LED light bead are electrically connected to the power input pin and the power output pin of the LED driving chip therein, respectively, so that the LED driving chip provides a power signal to the LED light emitting unit; The power output ports and power input ports of adjacent LED light beads are electrically connected to form a serial power supply line; 10. The LED panel according to claim 6, wherein a power input port of a first LED light bead of the LED string is electrically connected to a power supply terminal, and a power output port of a last LED light bead of the LED string is electrically connected to a ground terminal.

11. 11. The LED panel according to claim 10, wherein the serial power supply lines between two adjacent LED strings are connected in parallel to form a parallel power supply line.

12. The LED light beads of the plurality of LED strings are arranged in a matrix, the LED light beads of the same LED string are in the same column, the LED light beads at the same position of different LED strings are in the same row, and the serial power supply lines between the LED light beads of two adjacent rows are connected in parallel to form a parallel power supply line; or, 12. The LED panel of claim 11, wherein the LED light beads of the plurality of LED strings are arranged in a matrix, the LED light beads of the same LED string are in the same row, the LED light beads at the same position of different LED strings are in the same column, and the serial power supply lines between the LED light beads of two adjacent columns are connected in parallel to form a parallel power supply line.

13. Each LED light bead further includes a power gate circuit disposed between the power input port and the power input pin; 12. The LED panel according to claim 11, wherein the power gate circuit, when detecting that a power signal is present on both the serial power supply line and the parallel power supply line, conducts the serial power supply line to the power supply input pin; or, when detecting that a power signal is present on one of the serial power supply line and the parallel power supply line but not on the other, conducts the power supply line on which a power signal is present to the power supply input pin.

14. An LED display screen, comprising: a controller; and at least two LED panels, the at least two LED panels being joined together in sequence to form the LED display screen, the controller being provided on the top and / or bottom of the LED display screen; Each LED panel includes a plurality of LED strings, each LED string includes a plurality of LED light beads, each LED light bead is provided with a first signal input port, a first signal output port, a second signal input port, and a second signal output port, and an LED driving chip and an LED light emitting unit are packaged inside the LED light bead; The first signal input port, the second signal input port, the first signal output port, and the second signal output port of each LED light bead are electrically connected to the first signal input pin, the second signal input pin, the first signal output pin, and the second signal output pin of the LED driving chip therein, respectively, so that a data signal is transmitted to the LED light emitting unit via any signal input pin of the LED driving chip; The first signal output port and the second signal output port of the adjacent LED light beads are electrically connected to the first signal input port and the second signal input port, respectively, to form a serial signal line; The serial signal line is used to transmit data signals to subsequent LED light beads when there is no fault in the LED light bead or the internal LED driving chip; and The first signal input port and the second signal output port of each LED light bead are directly electrically connected, bypassing the internal LED driving chip, to form a first breakpoint transmission resume line; The first breakpoint transmission resume line is used to continuously transmit a data signal to a subsequent LED light bead when a failure occurs in the LED light bead or the internal LED driving chip; 1. An LED display screen, wherein the signal flow directions in the at least two LED panels are the same, or the signal flow directions of at least some of the adjacent LED panels of the at least two LED panels are opposite.

15. The second signal output port of the first LED light bead is electrically connected to the second signal input port of the second LED light bead, forming a second breakpoint transmission resume line; 15. The LED display screen of claim 14, wherein the first LED light bead is an LED light bead of any one of the LED strings, and the second LED light bead and the first LED light bead are spaced apart by at least two LED light beads.

16. Each LED light bead is further provided with a power input port and a power output port; The power input port and the power output port of each LED light bead are electrically connected to the power input pin and the power output pin of the LED driving chip therein, respectively, so that the LED driving chip provides a power signal to the LED light emitting unit; The power output port and the power input port of the adjacent LED light beads are electrically connected to form a serial power supply line; 16. The panel of claim 14 or 15, wherein a power input port of a first LED light bead of the LED string is electrically connected to a power supply terminal, and a power output port of a last LED light bead of the LED string is electrically connected to a ground terminal.

17. 17. The LED panel according to claim 16, wherein the serial power supply lines between two adjacent LED strings are connected in parallel to form a parallel power supply line.

18. An LED panel, comprising: a plurality of LED strings, each of the LED strings comprising a plurality of LED light beads, each of the LED light beads being provided with a power input port and a power output port, each of the LED light beads having an LED driving chip and an LED light emitting unit packaged therein; The power input port and the power output port of each LED light bead are electrically connected to the power input pin and the power output pin of the LED driving chip therein, respectively, so that the LED driving chip provides a power signal to the LED light emitting unit; In the same LED string, the power output ports and power input ports of adjacent LED light beads 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.

19. The LED light beads of the plurality of LED strings are arranged in a matrix, the LED light beads of the same LED string are in the same column, the LED light beads at the same position of different LED strings are in the same row, and the serial power supply lines between the LED light beads of two adjacent rows are connected in parallel to form a parallel power supply line; or, 20. The LED panel of claim 18, wherein the LED light beads of the plurality of LED strings are arranged in a matrix, the LED light beads of the same LED string are in the same row, the LED light beads at the same position of different LED strings are in the same column, and the serial power supply lines between the LED light beads of two adjacent columns are connected in parallel to form a parallel power supply line.

20. Each LED light bead further includes a power gate circuit disposed between the power input port and the power input pin; 20. The LED panel according to claim 19, wherein the power gate circuit, when detecting that a power signal is present on both the serial power supply line and the parallel power supply line, causes the serial power supply line to be electrically connected to the power input pin; or, when detecting that a power signal is present on one of the serial power supply line and the parallel power supply line but not on the other, causes the power supply line on which a power signal is present to be electrically connected to the power input pin.

21. An LED display screen, comprising: a controller; and at least two LED panels, each LED panel comprising a plurality of LED strings; Each LED string includes a plurality of LED light beads, each of which has a power input port and a power output port, and each of which has an LED driving chip and an LED light unit packaged therein; The controller is electrically connected to the power input port of the first LED light bead and the power output port of the last LED light bead of each LED string, and is used to supply power signals to the LED light beads; The power input port and the power output port of each LED light bead are electrically connected to the power input pin and the power output pin of the LED driving chip therein, respectively, so that the LED driving chip provides a power signal to the LED light emitting unit; In each LED panel, the power input ports and power output ports of adjacent LED light beads of 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.

22. In the LED panel, the LED light beads of the plurality of LED strings are arranged in a matrix, the LED light beads of the same LED string are in the same column, the LED light beads at the same position of different LED strings are in the same row, and the serial power supply lines between the LED light beads of two adjacent rows are connected in parallel to form a parallel power supply line; or, 22. The LED display screen of claim 21, wherein in the LED panel, the LED light beads of the plurality of LED strings are arranged in a matrix, the LED light beads of the same LED string are in the same row, the LED light beads at the same position of different LED strings are in the same column, and the serial power supply lines between the LED light beads of two adjacent columns are connected in parallel to form a parallel power supply line.

23. In the LED panel, each LED light bead further includes a power gate circuit disposed between the power input port and the power input pin; 23. The LED display screen of claim 22, wherein the power gate circuit conducts the serial power supply line to the power input pin when it detects that a power signal exists on both the serial power supply line and the parallel power supply line, or conducts the power supply line on which a power signal exists to the power input pin when it detects that a power signal exists on one of the serial power supply line and the parallel power supply line but not on the other.

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