LED strings, LED panels, and LED display screens

Abstract

We provide 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 restart line, thereby 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 are electrically connected between the first LED light bead and the second LED light bead, which are separated by at least two LED light beads, forming a second breakpoint transmission restart line, thereby enabling the transmission of data signals to the second LED light bead and subsequent LED light beads even if failures occur in a series of LED light beads. Furthermore, energy consumption is saved by adopting a serial power supply method.

Description

Technical Field

[0001] This application relates to the technical field of displays, and particularly to LED strings, LED panels, and LED display screens.

Background Art

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

[0003] In the technical field of LED displays, an LED strip screen is a common LED display screen, usually including a controller and a plurality of LED strings, and each LED string includes a plurality of LED light beads. The controller is responsible for controlling the display of the LED light beads of the plurality of LED strings, that is, supplying data signals to each LED string, and the data signals are sequentially transmitted from the first LED light bead of the LED string to the subsequent LED light beads, and each LED light bead displays the corresponding data.

[0004] In the above LED strip screen, when a failure occurs in a part of the LED light beads in the same LED string, there is a problem that the subsequent LED light beads cannot receive the data signal normally.

Summary of the Invention

Problems to be Solved by the Invention

[0005] Multiple embodiments of the present invention provide LED strings, LED panels, and LED display screens that improve the reliability of LED display screens by forming breakpoint transmission restart lines in the LED string, thereby solving the problem in which subsequent LED light beads cannot properly receive data signals due to a failure in a preceding LED light bead. [Means for solving the problem]

[0006] Embodiments of the present invention provide an LED string comprising a plurality of serially connected LED light beads, each LED light bead having a first signal input port and a first signal output port, and a second signal input port and a second signal output port, with an LED driver chip and an LED light-emitting unit packaged inside the LED light bead, wherein the first signal input port, second signal input port, first signal output port, and second signal output port of each LED light bead are electrically connected to the first signal input pin, second signal input pin, first signal output pin, and second signal output pin of the internal LED driver chip, respectively, thereby transmitting a data signal to the LED light-emitting unit via any of the signal input pins of the LED driver chip, the first signal output port and second output port of adjacent LED light beads are electrically connected to the first signal input port and second signal input port, respectively, forming a serial signal line, and the first signal input port and second signal output port of each LED light bead are directly electrically connected, bypassing the internal LED driver chip, thereby forming a first breakpoint transmission restart line.

[0007] Embodiments of the present invention provide an LED panel comprising a plurality of LED strings, each LED string comprising a plurality of LED light beads, each LED light bead having a first signal input port and a first signal output port, and a second signal input port and a second signal output port, and an LED driver chip and an LED light-emitting unit packaged inside the LED light bead, the first signal input port, second signal input port, first signal output port and second signal output port of each LED light bead being electrically connected to the first signal input pin, second signal input pin, first signal output pin and second signal output pin of the LED driver chip located inside, respectively, thereby transmitting a data signal to the LED light-emitting unit via one of the signal input pins of the LED driver chip, the first signal output port and second output port of adjacent LED light beads being electrically connected to the first signal input port and second signal input port, respectively, forming a serial signal line, and the first signal input port and second signal output port of each LED light bead being directly electrically connected, bypassing the LED driver chip located inside, thereby forming a first breakpoint transmission restart line.

[0008] Embodiments of the present application include a controller and at least two LED panels, the at least two LED panels being joined in sequence to form the LED display screen, the controller being located at 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 and a first signal output port, and a second signal input port and a second signal output port, and an LED driver chip and an LED light-emitting unit being packaged inside the LED light bead, the first signal input port, second signal input port, first signal output port and second signal output port of each LED light bead being connected to the first signal input pin and second signal output pin of the LED driver chip located inside, respectively. The LED display screen is provided, wherein the LED light bead is electrically connected to a signal input pin, a first signal output pin, and a second signal output pin, thereby transmitting a data signal to the LED light-emitting unit via the signal input pin of either of the LED driver chips, the first signal output port and the second output port of adjacent LED light beads 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 directly electrically connected, bypassing the LED driver chip inside them, forming a first breakpoint transmission restart line, the direction of signal flow in the at least two LED panels is the same, or the direction of signal flow in at least some of the adjacent LED panels among the at least two LED panels is opposite.

[0009] An embodiment of the present invention provides an LED panel comprising a plurality of LED strings, each LED string comprising a plurality of LED light beads, each LED light bead having a power input port and a power output port, an LED driver chip and an LED light-emitting unit packaged inside the LED light bead, the power input port and power output port of each LED light bead being electrically connected to the power input pin and power output pin of the LED driver chip located inside, thereby supplying a power signal to the LED light-emitting unit by the LED driver chip, in which case the power output port and power input port of adjacent LED light beads in the same 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.

[0010] Embodiments of the present invention provide 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 comprising a plurality of LED light beads, each LED light bead having a power input port and a power output port, an LED driver chip and an LED light-emitting unit packaged inside the LED light bead, the controller being 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 used to supply power signals to the LED light beads, the power input port and power output port of each LED light bead being electrically connected to the power input pins and power output pins of the LED driver chip located inside, thereby supplying power signals to the LED light-emitting unit by the LED driver chip, 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 this 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 restart line is formed, thereby ensuring that data signals can be transmitted to the next LED light bead even if a failure occurs in the LED driver chip, solving the problem of data signals not being transmitted to subsequent LED light beads when a failure occurs in a specific LED light bead.

[0012] More preferably, a second signal output port and a second signal input port are electrically connected between a first LED light bead and a second LED light bead separated by at least two LED light beads, forming a second breakpoint transmission restart line. This allows data signals to be transmitted to the second LED light bead and subsequent LEDs even if a failure occurs in a series of consecutive LED light beads, solving the problem of being unable to transmit data signals to subsequent LED light beads when a failure occurs in a series of consecutive LED light beads.

[0013] More preferably, energy consumption can be saved by having the LED string employ a serial power supply method.

[0014] More preferably, by employing a serial-parallel hybrid power supply method for the LED panel and LED display screen, energy consumption can be saved while solving the problem of serial power supply methods where a failure in a specific LED light bead causes power to be cut off to subsequent LED light beads. This reduces the number of LED light beads whose power is cut off as much as possible, lowers the risk of the entire LED display screen becoming inoperable, and improves the reliability of the LED display screen. [Brief explanation of the drawing]

[0015] The drawings described herein are provided to provide a further understanding of the present application and constitute part of the present application; the schematic embodiments and descriptions thereof are for illustrative purposes only and do not unduly limit the present application. In the drawings, [Figure 1a] This is a schematic diagram of the structure of an example of an LED light bead according to an exemplary embodiment of the present invention. [Figure 1b] This is a schematic diagram of the structure of another LED light bead according to an exemplary embodiment of the present invention. [Figure 2a] This is a schematic diagram of the structure of an example of an LED string according to an exemplary embodiment of the present invention. [Figure 2b] This is a schematic diagram of the structure of another LED string according to an exemplary embodiment of the present invention. [Figure 2c] This is a schematic diagram of yet another LED string structure according to an exemplary embodiment of the present invention. [Figure 2d] This is a schematic diagram of yet another LED string structure according to an exemplary embodiment of the present invention. [Figure 3a] This is a schematic diagram of the structure of a serial-powered LED panel according to an exemplary embodiment of the present invention. [Figure 3b] This is a schematic diagram of the structure of a serial-parallel powered LED panel according to an exemplary embodiment of the present invention. [Figure 4a] This is a schematic diagram of the structure of an LED display screen according to an exemplary embodiment of the present invention. [Figure 4b] This is a schematic diagram of the structure of another LED display screen according to an exemplary embodiment of the present invention. [Figure 4c] This is a schematic diagram of the structure of yet another LED display screen according to an exemplary embodiment of the present invention. [Figure 4d] This is a schematic diagram of the structure of yet another LED display screen according to an exemplary embodiment of the present invention. [Modes for carrying out the invention]

[0016] To make the objectives, technical solutions and advantages of the present application clearer, the following will clearly and completely describe the technical solutions of the present application by referring to specific embodiments of the present application and their corresponding drawings. It is obvious that the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0017] In the same LED string, when a part of the LED light beads fails, there will be a technical problem that the subsequent LED light beads cannot receive the data signal normally. In the embodiment of the present application, the first signal input port and the second signal output port of the LED light beads are directly electrically connected, and a first breakpoint transmission restart line is formed, so as to ensure that the data signal can be transmitted to the next LED light bead even when a failure occurs in the LED driving chip, and solve the problem that the data signal cannot be 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 separated by at least two LED light beads, and a second breakpoint transmission restart line is formed, so that even when a failure occurs in a plurality of consecutive LED light beads, the data signal can be transmitted to the second LED light bead and the subsequent LEDs, and solve the problem that the data signal cannot be transmitted to the subsequent LED light beads when a failure occurs in a plurality of consecutive LED light beads.

[0019] More preferably, in the embodiment of the present application, by adopting a serial power supply method for the LED string, the energy consumption of the power supply can be saved.

[0020] More preferably, in the embodiments of the present invention, the LED panel and LED display screen employ a serial-parallel hybrid power supply method, thereby saving energy consumption of the power supply and solving the problem of serial power supply methods in which power is cut off to subsequent LED light beads when a failure occurs in a specific LED light bead, thereby minimizing the number of LED light beads whose power is cut off. The LED display screen is formed by joining at least two LED panels, and in the LED light beads of the LED panel, serial power supply lines 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 the entire LED display screen will become inoperable due to a failure in some LED light beads, and improving the reliability of the LED display screen.

[0021] The technical solutions provided by each embodiment of this application will be described in detail below with reference to the attached figures.

[0022] Figure 1a is a schematic diagram of the structure of an example of an LED light bead according to an exemplary embodiment of the present application. As shown in Figure 1a, the embodiment of the present application provides a novel LED light bead structure, namely an LED light bead 100, in which an LED driver chip 10 and an LED Emitting Unit 20 are packaged inside the LED light bead 100.

[0023] The LED light-emitting unit 20 is a basic light-emitting component and consists of one or more LED chips and associated auxiliary elements. The LED light-emitting unit 20 is the core part for outputting light and is a diode made of semiconductor material that emits light when current flows through it, and here the semiconductor material that can be used includes, but is 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 light-emitting unit, and its main role is to ensure that the LED light-emitting unit 20 operates under safe and efficient operating conditions and to provide various additional functions to meet the needs of various application scenes. These additional functions include, but are not limited to, controlling the display of the LED light-emitting unit 20 and controlling the power supply of the LED light-emitting unit 20. Controlling the display of the LED light-emitting unit 20 includes, but is not limited to, supplying data signals to the LED light-emitting unit 20 and controlling dimming of the LED light-emitting unit 20. Controlling the power supply of the LED light-emitting unit 20 includes, but is not limited to, supplying power current to the LED light-emitting unit 20 and providing, but is not limited to, overvoltage protection (to prevent damage to the LED light-emitting unit due to excessively high input voltage), overcurrent protection (to prevent overheating or damage to the LED light-emitting unit due to excessively high current), and short-circuit protection (to ensure the safety of the LED light-emitting unit by automatically cutting off the power supply when a short circuit occurs in the circuit).

[0025] The LED driver chip 10 and the LED light-emitting unit 20 each have multiple pins, and the interconnection between these pins forms the basis for the LED driver chip 10 to control and drive the LED light-emitting unit 20. These pins are electrically connected to each other through the circuit design, thereby allowing the LED driver chip 10 to transmit data signals to the LED light-emitting unit 20, which in turn control the operation of the LED light-emitting unit 20. Various signal inputs are set to control various operations of the LED light-emitting unit 20, including but not limited to brightness adjustment, color correction, and temperature correction. The signal driving form of these data signals can vary, as long as it meets the needs of the LED display, and the embodiments of this application are not limited thereto. For example, the signal driving may be a simple clock drive to synchronize the data signals, a data drive to transmit image or character information, or a control drive to adjust the on / off state or brightness level of the LEDs. With such a design, the LED light-emitting unit 20 can accurately reproduce the content of various images and videos and provide a rich visual experience. In the embodiments of this application, the internal mounting structure and pins of the LED driver chip 10 are not particularly limited, and similarly, the internal mounting structure and pins of the LED light-emitting unit 20 are not limited. Below, the pins of the LED driver chip 10 and the pins of the LED light-emitting unit 20 will be described illustratively based solely on their function.

[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 ground of the circuit, 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 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 drive 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 this application, the case in which the communication interface pins of the LED driver chip 10 include at least a first signal input pin P1 and a first signal output pin M1, a second signal input pin P2 and a second signal output pin M2, and a signal control pin will be described as an example.

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

[0028] In the embodiments of this invention, in order to facilitate the supply of data signals to the LED driver chip 10 from an external source (e.g., a controller of an LED display screen), the data signals refer to display data necessary for controlling the display of the LED light beads. As shown in Figure 1a, the LED light beads 100 have 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 that are accessible from the outside. 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, forming one 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, forming one data signal transmission line. Here, the two transmission lines may be used by the LED driver chip 10 to transmit data signals to the LED light-emitting unit 20 in order to control the display of the LED light-emitting unit 20.

[0029] Furthermore, the first signal output port DO and the second output port FDO of the LED light bead 100 are electrically connected to the first signal input port DI and the 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. In other words, the corresponding signal input ports and signal output ports are electrically connected between adjacent LED light beads 100, forming 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 via 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 enters the next LED light bead 100 via the first signal input port DI of the next LED light bead 100, thus performing serial communication. Alternatively, the data signal enters the second signal input pin P2 of the LED driver chip via 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 enters the next LED light bead 100 via the second signal input port FDI of the next LED light bead 100, thus performing serial communication. From the above, it was found that since both of the above transmission lines 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 subsequent light beads.

[0031] To improve fault tolerance for data signal transmission between the LED light beads 100, in this embodiment, a first breakpoint transmission restart line is added between the first signal input port DI and the second signal output port FDO of the LED light beads 100. That is, the first signal input port DI and the second signal output port FDO are directly electrically connected, skipping (or bypassing) the LED driver chip 10. For example, the first signal input port DI and the second signal output port FDO may be directly electrically connected via a wire, or a wire (or wiring) that does not go through the LED driver chip may be added between the first signal input port DI and the second signal output port FDO on the PCB board where the LED light beads 100 are located, and the first signal input port DI and the second signal output port FDO are directly electrically connected by this wire, forming a first breakpoint transmission restart line between the first signal input port DI and the second signal output port FDO.

[0032] If a first breakpoint transmission restart line is added, and a failure occurs in the LED driver chip 10 of the LED light bead 100 (or if a failure occurs in the LED light bead 100), the first signal input port DI of the LED light bead 100 -> first signal input pin P1 of the LED driver chip -> first signal output pin M1 -> first signal output port DO of the LED light bead 100, and the second signal input port FDI of the LED light bead 100 -> second signal input pin P2 of the LED driver chip -> second signal output pin M2 -> second signal of the LED light bead 100 Although data signal transmission to subsequent LED light beads 100 can no longer be sustained via the two transmission lines, the first output port FDO, data signals can still be transmitted to subsequent LED light beads 100 via the first breakpoint transmission restart line (when 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 likelihood of the entire LED string becoming inoperable due to a failure in a single LED light bead 100 or driver chip.

[0033] Figure 1b is a schematic diagram of the structure of another LED light bead 100 according to an exemplary embodiment of the present invention. As shown in Figure 1b, the LED light bead 100 is further provided with a power input port Vin and a power output port Vout, which are electrically connected to the power input pin V1 and power output pin V2 of the LED driver chip 10, respectively, thereby supplying a power signal to the LED light-emitting unit 20 by the LED driver chip 10. Furthermore, the power output port Vout of the current LED light bead 100 and the power input port Vin of the next LED light bead 100 are electrically connected, thereby forming a serial power supply line between adjacent LED light beads 100. This serial power supply line allows multiple serially connected LED light beads 100 to be powered using the same power supply. The voltage from the power supply is distributed among the multiple LED light beads 100, which helps to make full use of the power supply resources and reduce the energy consumption of the power supply. Preferably, if the load on multiple LED light beads 100 is 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, it is possible to connect five LED light beads 100 in series.

[0034] Based on the LED light beads 100 shown in Figure 1a or Figure 1b above, embodiments of the present application also provide an LED string. Figure 2a is a schematic structural diagram of an example of an LED string according to an exemplary embodiment of the present application. As shown in Figure 2a, the LED string includes a plurality of serially connected LED light beads 100, 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, 100, etc., depending on the application scene or the size of the display screen. In embodiments of the present application, the LED string in Figure 2a is exemplified by 11 LED light beads 100, but is not limited thereto. The mounting structure of each LED light bead 100 is as shown in Figure 1a or Figure 1b. Specifically, each LED light bead 100 is provided with a first signal input port and a first signal output port, and a second signal input port and a second signal output port, and an LED driver chip and an LED light-emitting unit are packaged inside the LED light bead 100. In an LED string, the first signal input port and the second signal input port 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 signal input port and / or the second signal input port of the first LED light bead 100 receive these data signals, and then this first signal output port and / or the second signal output port transmits these signals to the next LED light bead 100. This serial connection method ensures that data signals are transmitted sequentially from one LED light bead 100 to the next, up to the last light bead in the LED string.

[0035] In the embodiments of this invention, each LED light bead 100 in an 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 to form a path called the "first breakpoint transmission restart line". When the LED driver chip is operating normally, data signals enter the LED light bead 100 via DI or FDI, are processed by the LED driver chip, and then transmitted to the next light bead via DO or FDO. However, if the LED driver chip fails, data signals can no longer be output via DO or FDO. In this case, since DI and FDO are directly electrically connected, data signals can be transmitted from DI to the next LED light bead 100 via FDO, skipping the failed LED driver chip. In this way, even if a failure occurs in the LED driver chip of a specific LED light bead 100, the transmission of data signals to the next LED light bead 100 can be maintained, and data transmission can be maintained 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 obtaining a serial connection of power signals. This design ensures a continuous and stable power supply from the power terminal to each LED light bead 100.

[0037] Figure 2b is a schematic diagram of the structure of another LED string according to an exemplary embodiment of the present invention. In Figure 2b, based on the LED string shown in Figure 2a, the second signal output port of the first LED light bead 100 of the LED string and the second signal input port of the second LED light bead 100 are electrically connected to form a second breakpoint transmission restart line, so that even if two or more consecutive LED light beads 100 between the first LED light bead 100 and the second LED light bead 100 fail, the transmission of data signals to the second LED light bead 100 and subsequent LED light beads 100 can be maintained. The first LED light bead 100 is any LED light bead 100 of the LED string, and the second LED light bead 100 and the first LED light bead 100 are separated by at least two LED light beads 100.

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

[0039] An LED string may have one or more groups of light beads, and if there are multiple groups of light beads in an LED string, different groups of light beads will have different first LED light beads 100 and second LED light beads 100. If two or more consecutive LED light beads 100 between the first LED light bead 100 and the second LED light bead 100 fail, these failed LED light beads 100 cannot transmit data signals backward via the serial transmission line to the next LED light bead 100, but can transmit data signals to the next LED light bead 100 via the first breakpoint transmission restart line. Furthermore, if a failure occurs in the next LED light bead 100, data signal transmission to subsequent LED light beads 100 cannot be sustained via the first breakpoint transmission restart line of that LED light bead 100. However, due to the presence of a second breakpoint transmission restart 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 restart line, thereby ensuring the continuation of data signal transmission to the second LED light bead 100 and subsequent light beads. Here, the second breakpoint transmission restart line can directly skip the LED light bead 100 in which the failure occurred, thereby ensuring the continuation of data signal transmission to the second LED light bead 100 and subsequent LED light beads 100, allowing for failure in some of the LED light beads 100 of the LED string without causing a failure of the entire LED string, and improving the performance of the LED string.

[0040] For example, in the first group of LED light beads 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. The second signal output port of the first LED light bead 100 and the second signal input port of the second LED light bead 100 are electrically connected, forming a second breakpoint transmission restart line. If a failure occurs in the LED light bead 100 immediately following the first LED light bead 100, the data signal can be transmitted to subsequent LED light beads 100 by skipping this failed LED light bead 100 via the first breakpoint transmission restart line. However, if two consecutive LED light beads 100 after the first LED light bead 100 fail, the data signal cannot be transmitted via the first breakpoint transmission restart line. In this case, the second breakpoint transmission restart line bypasses the two failed light beads, allowing the data signal to be transmitted directly from the first LED light bead 100 to the second LED light bead 100.

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

[0042] In the embodiments of the present invention, 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 any embodiment, of two adjacent light bead groups of an LED string, the first LED light bead 100 of the later light bead group is an LED light bead 100 that precedes the second LED of the earlier light bead group, but is different from the first LED light bead 100 of the earlier light bead group. In this way, the adjacent light bead groups are arranged in a staggered pattern, which is advantageous in further reducing the impact of a failed LED light bead 100. In another embodiment, of two adjacent light bead groups of an LED string, the first LED light bead 100 of the later light bead group is an LED light bead 100 that precedes or follows the second LED light bead 100 of the earlier light bead group. In this way, the adjacent light bead groups appear sequentially, not in a staggered pattern.

[0043] More preferably, if two adjacent second breakpoint transmission restart lines of one LED string are separated by only one LED light bead 100, then this light bead is the second LED light bead 100 of the preceding light bead group among the adjacent light bead groups, and is also the first LED light bead 100 of the following light bead group. If two adjacent second breakpoint transmission restart lines of one LED string are separated by at least two LED light beads 100, then the first LED light bead 100 of the following light bead group among the adjacent light bead groups is the LED light bead 100 that is after the second LED light bead 100 of the preceding light bead group. As shown in Figure 2b, the second breakpoint transmission restart line of the first light bead group and the second breakpoint transmission restart line of the second light bead group are separated by only one LED light bead 100, and this light bead is the second LED light bead 100 of the first light bead group, and is also the first LED light bead 100 of the second light bead group. The breakpoint transmission restart line of the second light bead group and the breakpoint transmission restart line of the third light bead group are separated 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 that is after the second LED light bead 100 of the second light bead group.

[0044] In the embodiments of this application, 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. The number of LED light beads 100 between the first LED light bead 100 and the second LED light bead 100 in a group of LED light beads may be adjusted according to the application scene, and the application scene includes, but is not limited to, the voltage demand of each LED light bead 100 or the failure probability of the LED light bead 100. For example, in an application scene where it is necessary for the voltage of all LED light beads 100 in an LED string 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 is the same in different groups of LED light beads in an LED string. In an application scenario requiring that the first group of LED light beads be high-voltage LED light beads 100 and the second group of LED light beads 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 separated by two LED light beads 100, and in the second group of LED light beads, the first LED light bead 100 and the second LED light bead 100 are separated by five LED light beads 100. In this case, the number of LED light beads between the first and second LED light beads will differ in different groups of LED light beads in the LED string.

[0045] Figure 2c is a schematic diagram of yet another LED string structure according to an exemplary embodiment of the present invention. Compared with the LED strings shown in Figures 2a and 2b, the string shown in Figure 2c shows the internal substructure of the LED light beads 100. As shown in Figure 2c, the LED string includes a plurality of LED light beads 100, which are connected in serial order. The serial connection relationships and data signal transmission lines between the plurality of LED light beads 100 are all the same as in the previously described embodiment and 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 previously described embodiment and will not be described in detail here.

[0046] More preferably, in the LED string shown in Figure 2c, the LED driver chip of the LED light bead 100 includes a monitoring circuit electrically connected to the first signal input pin and the second signal input pin of the LED driver chip, an analysis circuit electrically connected to the monitoring circuit, and a drive circuit electrically connected to the analysis circuit. The monitoring circuit monitors whether the first signal input pin and the second signal input pin have received a data signal, and if, as a result of the monitoring, either signal input pin has received a data signal, it outputs the data signal and the pin indicator of the signal input pin that received the data signal to the analysis circuit.

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

[0048] Different pin identifiers correspond to different signal input pins, and the data signals received by different signal input pins may be different, specifically relating to how the LED driver chip (specifically, the driver circuit of the LED driver chip) processes the data signals. In any one embodiment, the LED driver chip (specifically, the driver circuit of the LED driver chip) of each LED light bead 100 is responsible for analyzing the data slots required for the LED light bead 100 from the received data signal, using those data slots to drive the LED light-emitting unit of the LED light bead 100 to emit light, and then transmitting 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 restart line and / or the second breakpoint transmission restart line according to the above embodiment, the remaining data slots included in the data signals arriving at different signal input pins are different, and therefore the processing method of subsequent LED light beads 100 by the LED driver chip is also different. Therefore, in the embodiments of the present invention, there is a different analysis method for each signal input pin. Specifically, the analysis circuit analyzes the data slot required for the LED light bead 100 to which the received data signal belongs, using an appropriate analysis method.

[0049] Specifically, the analysis circuit receives the pin indicators and data signals output by the monitoring circuit, analyzes the data slots corresponding to the LED light-emitting unit from the data signals according to the analysis method corresponding to the pin indicators, and outputs these data slots to the drive circuit. These data slots contain specific information about how to control the LED light-emitting unit, such as display attributes like brightness adjustment and color change. The drive circuit controls the LED light-emitting unit based on these data slots, causing the LED light beads 100 to emit light in the expected manner.

[0050] Here, different signal pins correspond to different analysis methods. Combining the data signal processing methods in the above embodiment, if the pin indicator output by the monitoring circuit corresponds to the first signal input pin, the corresponding analysis method is to analyze the data slots required for the LED light bead 100 from the corresponding position in the received data signal according to the order of the series connection between each LED light bead 100. If the pin indicator output by the monitoring circuit corresponds to the second signal input pin, the corresponding analysis method, in addition to analyzing the data slots required for the LED light bead 100 from the corresponding position in the received data signal according to the order of the series connection between each LED light bead 100, may also delete other data slots preceding that data slot (these data slots are invalid because they correspond to the faulty LED light bead 100) in order to reduce the amount of data transmitted later and save transmission and processing resources. Note that the data signal processing method by the LED driver chip and the corresponding analysis method described here are illustrative and not limited thereto, and the embodiments of this application are not limited thereto.

[0051] In the embodiments of this invention, the LED driver chip includes three parts: a monitoring circuit, an analysis circuit, and a drive circuit. The monitoring circuit ensures that data signals are accurately recognized and transmitted regardless of which pin they are input from; the analysis circuit processes the data according to a specific analysis method for each pin, ensuring accurate extraction of data slots; and the drive circuit accurately controls the LED light-emitting units based on the analyzed data slots to achieve the expected display effect. Overall, this process performs signal monitoring, analysis, and final control in a continuous manner, allowing the same LED driver chip to flexibly control LED light-emitting units based on various input signals, improving the flexibility and expressiveness of LED string control while ensuring accuracy and efficiency of signal processing.

[0052] In practical applications, the LED light beads 100 of multiple LED strips may be powered by a controller. When controlling the power supply, a voltage-stabilized power supply method can be used to power multiple LED light beads 100 on the same LED strip in parallel, thereby reducing mutual influence between the LED light beads 100. However, while such a parallel power supply method ensures the consistency of brightness of all LED lights and allows other light beads to operate normally even if one light bead fails, several problems exist. For example, in a parallel power supply method, in order to ensure the safety of the LED light beads 100, it is necessary to limit the current by placing a current-limiting resistor on each LED light bead 100. These resistors can generate heat and consume energy, and the energy consumption of the LED light beads 100 increases especially as the number of LED light beads 100 increases.

[0053] To solve the above problems, the embodiment of the present invention also provides an LED string using a serial power supply method. As shown in Figure 2d, in an LED string using a serial power supply method, the LED light beads 100 of the LED string are on the same serial power supply line, and these LED light beads 100 are powered together by the same power supply, and each LED light bead 100 has the same current, ensuring uniformity of brightness of each LED with the same current, and avoiding the problem of brightness unevenness due to differences in current. In addition, in the series connection power supply method, it is not necessary to individually place current limiting resistors for each LED light bead 100, so the energy consumption of these resistors can be reduced, and energy consumption is significantly saved, especially when there are many LED light beads 100. Furthermore, compared to the parallel power supply method, the series connection power supply method can power the entire LED string with a single constant current source, which is advantageous in reducing the complexity of the drive chip. Furthermore, compared to the parallel power supply method, the series power supply method receives relatively less current from each LED light bead 100, which reduces the amount of heat generated by a single LED. This not only reduces energy consumption but also contributes to extending the lifespan of the LEDs.

[0054] In the serial power supply method, each LED light bead 100 in the LED string is provided with 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, thereby supplying a power signal to the LED light-emitting unit by the LED driver chip. 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 beads 100 or LED strings. Figure 3a is a schematic structural diagram of an example of a serially powered LED panel according to an exemplary embodiment of the present application. As shown in Figure 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, 30, etc., but may also be more or less than these numbers, specifically determined by the application scene and the size of the display space. For example, in all of Figures 3a to 3b and Figures 4a to 4d, each LED panel is illustrated as including 4 LED strings, but is not limited to these. Each LED string in the LED panel has the same structure as the LED strings shown in Figures 2a, 2b, 2c, or 2d, and therefore will not be described in detail here. In any embodiment, data signals in the LED panel may be supplied by a controller. The controller includes multiple communication ports, each connected to a first signal input port and a second signal input port of the first LED light bead 100 of a plurality of LED strings, and can be used to supply data signals to the LED strings. The controller's mounting structure is not the focus of the embodiments of this application; any controller structure capable of supplying data signals to an LED panel can be applied to the embodiments of this application. In the embodiments of this application, the location of the controller is not limited and may be at the top or bottom of the display screen on which the LED panel resides, or the controller may be provided at both the top and bottom of the LED display screen on which the LED panel resides.

[0056] More preferably, as shown in Figure 3a, the LED panel further includes a power supply terminal and a ground terminal, the power supply terminal can be understood as a power supply and the ground terminal 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 a plurality of 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 a plurality of 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, thereby supplying a power signal to the LED light-emitting unit via the LED driver chip. 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 supplied by a controller, which is electrically connected to the power supply terminal VCC and the ground terminal GND shown in Figure 3a, and may supply the power signal to the LED string of the LED panel. More preferably, the controller may be electrically connected directly to the power supply terminal and the ground terminal, or it may be electrically connected to the power supply terminal and the ground terminal via a connector or other intermediate circuit, but is not limited thereto. Each LED light bead 100 is provided with a power input port Vin and a power output port Vout, which are electrically connected to the power input pin V1 and power output pin V2 of the LED driver chip located inside the LED light bead 100. In this connection configuration, the LED driver chip receives the power signal from the power input port Vin and transmits it to the LED light-emitting unit, thereby ensuring that the LED light-emitting unit is driven to 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; that is, the power output port Vout of the previous LED light bead 100 is electrically connected to the power input port Vin of the adjacent next LED light bead 100, forming a single 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 port Vin of the first LED light bead 100 of the multiple LED strings in the LED panel is connected in parallel to the power supply terminal, meaning that all LED strings receive power directly from the power supply terminal. Similarly, 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, thereby ensuring that the ends of all LED strings are properly grounded. The parallel connections to the power supply terminal and the ground terminal provide each LED string with a stable power supply, while the serial power supply line ensures continuity of the power signal throughout the entire LED string.

[0061] More preferably, in the embodiments of the present application, the arrangement of the LED panels is not limited and may be arranged in a matrix. For example, in a matrix arrangement, the LED strings are configured as multi-row and multi-column, with one LED string forming one row and LED light beads 100 at the same position in different LED strings forming one column. The first LED light bead 100 in each row receives data signals and power signals, which are then transmitted to subsequent LED strings via a serial connection.

[0062] Furthermore, for example, as shown in Figure 3a, in a matrix arrangement, the LED string is configured as a multi-column, multi-row arrangement, with each LED string being one column, and the LED light beads 100 at the corresponding positions in each LED string becoming one row of LED light beads 100. The first LED light bead 100 in each column receives data signals and power signals, and these signals are then transmitted to subsequent LED strings via a serial connection.

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

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

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

[0067] Figure 3b is a schematic diagram of the structure of an example of a serial-parallel powered LED panel according to an exemplary embodiment of the present invention. In Figure 3b, each LED string of the LED panel has the same internal structure as the LED string in Figure 3a, and VCC and GND have the same meaning in Figures 3b and 3a, so they will not be explained in detail here. As shown in Figure 3b, each LED string of the LED panel includes a plurality of LED light beads 100, these light beads are in the same column, and LED light beads 100 in the same position in different LED strings (i.e., different columns) are in the same row, and each row contains light beads from different LED strings, and the serial power supply lines between two adjacent rows of LED light beads 100 are connected in parallel to form a parallel power supply line. Preferably, the serial power supply lines between two adjacent rows of LED light beads 100 may be directly connected via wires, or other connection methods may be employed, but are not limited here. This connection method ensures that each row of LED light beads 100 receives a stable power supply while allowing parallel transmission of power signals between different columns. For example, an LED light bead 100 in a specific column of the previous row can supply power in parallel to each LED light bead 100 in the next row, and an LED in the same column in the previous row can supply power serially to the LED light beads 100 in the next row. This realizes a serial-parallel hybrid power supply system, and the parallel power supply system is used to solve the problem that subsequent LED light beads 100 cannot obtain a power signal due to a failure of a specific LED light bead 100 in the serial power supply line. Alternatively, multiple LED light beads 100 contained in each LED string of an LED panel are in the same row, with one row representing one LED string, and LED light beads 100 in the same position in different LED strings (i.e., different rows) are in the same column, with each column containing LED light beads 100 from different LED strings, and serial power supply lines between two adjacent columns of LED light beads 100 are connected in parallel to form a parallel power supply line.This connection method allows parallel transmission of power signals between different rows while ensuring that each row of LED light beads 100 receives a stable power supply, thereby realizing a serial-parallel hybrid power supply system. The parallel power supply system is used to solve the problem that a failure in a specific LED light bead 100 in the serial power supply line prevents subsequent LED light beads 100 from receiving a power signal.

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

[0069] Specifically, the power gate circuit can detect whether or not it has received a power signal from the serial power supply line and the parallel power supply line. If it detects that power signals are present on both the serial and parallel power supply lines, it connects the serial power supply line to the power input pin V1, prioritizing the use of the serial power supply method. In other words, the serial power supply line is preferentially used as the primary 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 or parallel power supply lines but not on the other, it connects the power supply line with the power signal to the power input pin V1, prioritizing power supply to the LED light bead 100.

[0070] Furthermore, if the serial power supply line lacks a power signal due to a failure in the previous LED light bead 100, the parallel power supply line acts as a spare path, gate-swapping and supplying power to subsequent LED light beads 100 in a timely manner, ensuring the normal operation of those LED light beads 100. This circuit design ensures high reliability and flexibility in the power supply to the LED light beads 100. The serial power supply line, as the primary 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 even if a problem occurs in the primary path, subsequent LED light beads 100 can obtain a power signal and operate normally.

[0071] In the embodiments of this invention, the power gate circuit contained inside each LED light bead 100 of the LED panel may be implemented using a relay or an electronic switch, but is not limited to these.

[0072] Furthermore, embodiments of the present application also provide an LED display screen of an LED panel as shown in Figure 3a or Figure 3b. The LED display screen according to embodiments of the present application comprises a controller and at least two LED panels, the at least two LED panels being joined in sequence to form an LED display screen, and the controller is located at the top and / or bottom of the LED display screen. That is, the LED display screen may have the controller located at the top, or at the bottom, or at both the top and bottom. The controller is responsible for driving an LED string of a predetermined length, which is not particularly limited and can drive strings of, for example, 5m, 6m, or 8m in length, the numbers here being illustrative, and the length of the LED string that each controller can drive may be longer or shorter. When one controller is used, it may be located at the top or bottom of the LED display screen. If many LED panels need to be driven, two controllers may be used, one at the top and the other at the bottom of the display screen. In this arrangement, there is no obstruction by the controller in the center of the LED display screen, satisfying the transparency requirements of the display screen, thereby enabling the LED display screen to be realized as a transparent screen. When the controller is located at the top of the display screen, or when two controllers are present (one at the top of the LED display screen and the other at its bottom), the display screen may be designed as a suspended screen overall. This configuration is suitable for places with high ceilings, such as exhibition halls, theaters, and large conference rooms, and offers flexible installation options. When the controller is located only at the bottom of the display screen, there is usually a base to support the entire display screen, and the display screen stands on the ground. This method is suitable for scenes requiring suspension, such as shop windows and small exhibition spaces.Preferably, the controller and the LED panel may be directly electrically connected, or they may be connected by specialized connectors, which not only ensure the reliability of the electrical connection but also facilitate installation and maintenance.

[0073] In the embodiments of this invention, 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, but is specifically determined according to the application scene and the size of the display space. For example, Figure 4a illustrates three LED panels A, B, and C; Figure 4b illustrates three LED panels D, E, and F; Figure 4c illustrates three LED panels G, H, and I; and Figure 4d illustrates three LED panels J, K, and L. Furthermore, the LED panels included in the LED display screen may be the same LED panel or different LED panels, where "same" means that the structure, type, size, and power supply method of the LED panel 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 panel is different. Due to this flexibility, the LED display screen can use the same or different LED panels to accommodate various display needs or application scenes. Preferably, the same LED panel is used in the LED display screens shown in Figures 4a to 4d. The LED display screens shown in Figures 4a to 4d differ in the number and placement of controllers, as well as the signal flow direction and power supply method used for some LED panels. For details, please refer to the description in the following embodiment.

[0074] In an LED display screen, the direction of signal flow is the same in at least two LED panels, or the direction of signal flow is opposite in at least some of the adjacent LED panels of at least two LED panels. For example, in at least two LED panels, the direction of signal flow in the last LED panel is opposite to the direction of signal flow in the other LED panels. The direction of signal flow here includes the direction of data signals and power signals, and for a single LED panel, the direction of signal flow may be from top to bottom, or bottom to top, or 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 the serial power supply lines between adjacent LED strings in the LED panel are connected in parallel to form a parallel power supply line, and the LED display screen is powered entirely by a serial-parallel power supply method. Preferably, the power supply method for each LED panel of the LED display screen may be serial power supply for some of the LED panels and serial-parallel power supply for the remaining LED panels.

[0076] Figure 4a is a schematic diagram of the structure of an example of an LED display screen according to an exemplary embodiment of the present invention. As shown in Figure 4a, the LED display screen is composed of three LED panels A to C. In Figure 4a, each LED string in each LED panel has the same internal structure as the LED string in Figure 3a. In Figures 4a and 3a, VCC and GND have the same meaning and will not be explained in detail here. These LED panels are powered by serial power supply, and these three LED panels are joined together to form a complete LED display screen. In the LED display screen shown in Figure 4a, the controller is located at the top of the LED display screen, and the direction of signal flow in the three LED panels A to C is the same, i.e., from top to bottom, thereby ensuring that the signal transmission direction of the entire LED display screen is consistent.

[0077] Figure 4b is a schematic diagram of the structure of another LED display screen according to an exemplary embodiment of the present invention. As shown in Figure 4b, the LED display screen consists of three LED panels D to F, and each LED string in each LED panel has the same internal structure as the LED string in Figure 3a. In Figures 4b and 3a, VCC and GND have the same meaning and will not be explained in detail here. In these LED panels, each serial power supply line is connected based on the serial power supply method shown in Figure 4a to form a parallel power line, and the LED display screen is powered by the serial-parallel power supply method. These three LED panels D to F are joined together to form a complete LED display screen. In the LED display screen shown in Figure 4b, the controller is located at the top of the LED display screen, and the direction of signal flow in LED panels D to F is the same, that is, from top to bottom, thereby the signal transmission direction of the entire LED display screen is consistent.

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

[0079] Figure 4d is a schematic diagram of yet another LED display screen structure according to an exemplary embodiment of the present invention. As shown in Figure 4d, the LED display screen consists of three LED panels J to L, and each LED string in each LED panel has the same internal structure as the LED string in Figure 3a. In Figures 4d and 3a, VCC and GND have the same meaning and are therefore not described in detail here. The power supply method for these LED panels is serial parallel power supply, and these three LED panels J to L are joined together to form a complete LED display screen. The LED display screen shown in Figure 4d includes two controllers located at the top and bottom of the LED display screen, respectively. The direction of signal flow in LED panels J and K is the same, i.e., from top to bottom, while the direction of signal flow in the last LED panel L is the opposite, from bottom to top. This avoids shielding by 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 serial power supply or serial-parallel power supply can be used as the power supply method. In addition, in the parallel power supply method, in order to ensure the safety of the LED light beads, it is necessary to place a current limiting resistor on each LED light bead to limit the current, but these resistors generate heat and consume energy, and considering that energy consumption increases especially when the number of LED light beads is large, 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 to whether or not it supports breakpoint transmission restart.

[0081] Specifically, another LED panel according to an embodiment of the present invention includes a plurality of LED strings, each LED string includes a plurality of LED light beads, each LED light bead is provided with a power input port and a power output port, an LED driver chip and an LED light-emitting unit are packaged inside the LED light bead, 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 driver chip located inside, respectively, thereby supplying a power signal to the LED light-emitting unit by the LED driver chip, in the same LED string, the power output port and 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 any embodiment, the LED light beads of the plurality of LED strings are arranged in a matrix, with LED light beads of the same LED string in the same column, LED light beads of the same position in different LED strings in the same row, and serial power lines between two adjacent rows of LED light beads 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, the power gate circuit, when it detects that a power signal is present on both the serial power line and the parallel power line, conducts the serial power line to the power input pin, or when it detects that a power signal is present on one of the serial power line and the parallel power line but not on the other, conducts the power line on which the power signal is present to the power input pin.

[0084] Detailed explanations of the LED panel structure, LED string structure, serial-parallel power supply line structure, power gate circuit, and other structures can be found in the previously described embodiment and will not be explained in detail here. Furthermore, by introducing a structural feature called breakpoint transmission restart in the LED panel according to this embodiment, the LED panel shown in Figure 3b can be obtained, and a detailed explanation of this LED panel can be found in the previously described embodiment and will not be explained in detail here.

[0085] In the embodiment of the present invention, the LED panel employs a serial-parallel hybrid power supply method, thereby reducing energy consumption and solving the problem of serial power supply methods where a failure in a specific LED light bead causes power to be cut off to subsequent LED light beads. This minimizes the number of LED light beads whose power is cut off, reduces the number of times the entire LED display screen becomes inoperable, and improves the reliability of the LED display screen.

[0086] In the above embodiment, the LED display screen has breakpoint transmission restart as its main structural feature, and serial power supply or serial-parallel power supply can be used as the power supply method. In addition, in the parallel power supply method, in order to ensure the safety of the LED light beads, it is necessary to place a current limiting resistor on each LED light bead to limit the current, but these resistors generate heat and consume energy, and considering that energy consumption increases especially when the number of LED light beads is large, the embodiment of the present application also provides another LED display screen, which has serial-parallel power supply as its main structural feature, and is not limited to whether or not 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, an LED driver chip and an LED light-emitting unit packaged inside the LED light bead, the controller being 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 used to supply power signals to the LED light beads, the power input port and power output port of each LED light bead being electrically connected to the power input pin and power output pin of the LED driver chip located inside, thereby supplying power signals to the LED light-emitting unit by the LED driver chip, in each LED panel the power input port and power output port 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 any embodiment, in the LED panel, the LED light beads of the plurality of LED strings are arranged in a matrix, LED light beads of the same LED string are in the same column, LED light beads of the same position in different LED strings are in the same row, and serial power lines between two adjacent rows of LED light beads are connected in parallel to form a parallel power supply line.

[0089] In any embodiment, the LED panel further includes a power gate circuit provided between the power input port and the power input pin, wherein the power gate circuit, when it detects that a power signal is present on both the serial power line and the parallel power line, conducts the serial power line to the power input pin, or, when it detects that a power signal is present on one of the serial power line and the parallel power line but not on the other, conducts the power line on which the power signal is present to the power input pin.

[0090] Detailed explanations of the LED display screen structure, LED panel structure, serial-parallel power supply line, power gate circuit, LED light beads, etc., can be found in the previously described embodiments and will not be explained in detail here. Furthermore, by introducing a structural feature called breakpoint transmission restart in the LED panel included in the LED display screen, the LED display screen shown in Figure 4b or 4d can be obtained, and a detailed explanation of the LED display screen shown in Figure 4b or 4d can be found in the previously described embodiments.

[0091] The embodiment of the present invention provides an LED display screen that employs a serial-parallel hybrid power supply method, thereby reducing energy consumption and solving the problem of serial power supply methods where a failure in a specific LED light bead causes power to be cut off to subsequent LED light beads. This minimizes the number of LED light beads whose power is cut off, reduces the number of times the entire LED display screen becomes inoperable, and improves the reliability of the LED display screen.

[0092] In this specification, the terms "First," "Second," etc., are used to distinguish different messages, devices, modules, etc., and do not indicate a sequential order, nor do they limit the existence of "First" and "Second" as different types.

[0093] The terms “include,” “contain,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, product, or apparatus containing a set of elements also includes other elements not expressly risked, or elements specific to such process, method, product, or apparatus. Unless otherwise specified, the elements limited by the phrase “contain…” do not preclude the presence of the same other elements in the process, method, product, or apparatus containing that element.

[0094] The foregoing are merely embodiments of the present application and do not limit it. Various modifications and changes are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present application should be included within the scope of the claims.

Claims

1. An LED string comprising a plurality of serially connected LED light beads, each LED light bead having a first signal input port and a first signal output port, and a second signal input port and a second signal output port, and an LED driver chip and an LED light-emitting unit packaged inside the LED light bead. The first signal input port, second signal input port, first signal output port, and second signal output port of each LED light bead are electrically connected to the first signal input pin, second signal input pin, first signal output pin, and second signal output pin of the internal LED driver chip, respectively, thereby transmitting data signals to the LED light-emitting unit via any of the signal input pins of the LED driver chip. The first and second signal output ports of adjacent LED light beads are electrically connected to the first and second signal input ports, respectively, forming a serial signal line. An LED string characterized in that the first signal input port and the second signal output port of each LED light bead are directly electrically connected, bypassing the LED driver chip located inside, thereby forming a first breakpoint transmission restart line.

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

3. The LED string according to claim 2, characterized in that the first LED light bead and the second LED light bead form a single light bead group, and there are multiple light bead groups in the LED string, and different light bead groups have different first LED light beads and second LED light beads.

4. The LED driver chip includes a monitoring circuit electrically connected to the first signal input pin and the second signal input pin, an analysis circuit electrically connected to the monitoring circuit, and a driver circuit electrically connected to the analysis circuit. The LED string according to claim 2, wherein the monitoring circuit outputs the data signal and the pin indicator of any of the signal input pins to the analysis circuit when any of the signal input pins receive a data signal, the analysis circuit analyzes the data slot corresponding to the LED light-emitting unit from the data signal according to the analysis method corresponding to the pin indicator, outputs the data slot to the drive circuit, the drive 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. Each LED light bead's power input port and power output port are electrically connected to the power input pins and power output pins of the internal LED driver chip, respectively, thereby supplying a power signal to the LED light-emitting unit via the LED driver chip. The power output port and power input port of adjacent LED light beads are electrically connected, forming a serial power supply line. The LED string according to any one of claims 1 to 4, characterized in that the power input port of the first LED light bead of the LED string is electrically connected to a power supply terminal, and the power output port of the 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 LED string comprising a plurality of LED light beads, each LED light bead provided with a first signal input port and a first signal output port, and a second signal input port and a second signal output port, and an LED driver chip and an LED light-emitting unit packaged inside the LED light bead. The first signal input port, second signal input port, first signal output port, and second signal output port of each LED light bead are electrically connected to the first signal input pin, second signal input pin, first signal output pin, and second signal output pin of the internal LED driver chip, respectively, thereby transmitting data signals to the LED light-emitting unit via any of the signal input pins of the LED driver chip. The first and second signal output ports of adjacent LED light beads are electrically connected to the first and second signal input ports, respectively, forming a serial signal line. An LED panel characterized in that the first signal input port and the second signal output port of each LED light bead are directly electrically connected, bypassing the LED driver chip located inside, thereby forming a first breakpoint transmission restart line.

7. The second signal output port of the first LED light bead and the second signal input port of the second LED light bead are electrically connected, forming a second breakpoint transmission restart line. The LED panel according to claim 6, characterized in that the first LED light bead is one of the LED light beads of the LED string, and the second LED light bead and the first LED light bead are separated by at least two LED light beads.

8. The LED panel according to claim 7, characterized in that the first LED light beads and the second LED light beads form a single light bead group, and there are multiple light bead groups in the LED string, and different light bead groups differ in that the first LED light beads and the second LED light beads are different.

9. The LED driver chip includes a monitoring circuit electrically connected to the first signal input pin and the second signal input pin, an analysis circuit electrically connected to the monitoring circuit, and a driver circuit electrically connected to the analysis circuit. The LED panel according to claim 7, characterized in that when any signal input pin receives a data signal, the monitoring circuit outputs the data signal and a pin indicator of any of the signal input pins to the analysis circuit, the analysis circuit analyzes the data slot corresponding to the LED light-emitting unit from the data signal according to an analysis method corresponding to the pin indicator, outputs the data slot to the drive circuit, the drive circuit displays and controls 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. Each LED light bead's power input port and power output port are electrically connected to the power input pins and power output pins of the internal LED driver chip, respectively, thereby supplying a power signal to the LED light-emitting unit via the LED driver chip. The power output port and power input port of adjacent LED light beads are electrically connected, forming a serial power supply line. The LED panel according to any one of claims 6 to 9, characterized in that the power input port of the first LED light bead of the LED string is electrically connected to a power supply terminal, and the power output port of the last LED light bead of the LED string is electrically connected to a ground terminal.

11. The LED panel according to claim 10, characterized in that 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 aforementioned plurality of LED strings are arranged in a matrix, with LED light beads of the same LED string in the same column, LED light beads of the same position in different LED strings in the same row, and serial power supply lines between two adjacent rows of LED light beads are connected in parallel to form a parallel power supply line. or, The LED panel according to claim 11, characterized in that the LED light beads of the plurality of LED strings are arranged in a matrix, LED light beads of the same LED string are in the same row, LED light beads at the same position in different LED strings are in the same column, and serial power supply lines between two adjacent rows of LED light beads are connected in parallel to form a parallel power supply line.

13. Each LED light bead further includes a power gate circuit located between the power input port and the power input pin. The LED panel according to claim 11, characterized in that the power gate circuit, when it detects 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 input pin, or when 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, conducts the power line on which the power signal is present to the power input pin.

14. An LED display screen comprising a controller and at least two LED panels, wherein the at least two LED panels are sequentially joined to form the LED display screen, and the controller is provided at the top and / or bottom of the LED display screen. Each LED panel includes multiple LED strings, each LED string includes multiple LED light beads, each LED light bead is provided with a first signal input port and a first signal output port, and a second signal input port and a second signal output port, and an LED driver chip and an LED light-emitting unit are packaged inside the LED light bead. The first signal input port, second signal input port, first signal output port, and second signal output port of each LED light bead are electrically connected to the first signal input pin, second signal input pin, first signal output pin, and second signal output pin of the internal LED driver chip, respectively, thereby transmitting data signals to the LED light-emitting unit via any of the signal input pins of the LED driver chip. The first signal output port and the second output port of adjacent LED light beads 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 second signal output port of each LED light bead are directly electrically connected, bypassing the LED driver chip located inside, thereby forming a first breakpoint transmission restart line. An LED display screen characterized in that the direction of signal flow in at least two of the LED panels is the same, or the direction of signal flow in at least some of the adjacent LED panels among the at least two LED panels is opposite.

15. The second signal output port of the first LED light bead and the second signal input port of the second LED light bead are electrically connected, forming a second breakpoint transmission restart line. The LED display screen according to claim 16, characterized in that the first LED light bead is one of the LED light beads of the LED string, and the second LED light bead and the first LED light bead are separated 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. Each LED light bead's power input port and power output port are electrically connected to the power input pins and power output pins of the internal LED driver chip, respectively, thereby supplying a power signal to the LED light-emitting unit via the LED driver chip. The power output port and power input port of adjacent LED light beads are electrically connected, forming a serial power supply line. The panel according to claim 14 or 15, characterized in that the power input port of the first LED light bead of the LED string is electrically connected to a power supply terminal, and the power output port of the last LED light bead of the LED string is electrically connected to a ground terminal.

17. The LED panel according to claim 16, characterized in that 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 multiple LED strings, each LED string comprising multiple LED light beads, each LED light bead provided with a power input port and a power output port, and an LED driver chip and an LED light-emitting unit packaged inside the LED light bead. Each LED light bead's power input port and power output port are electrically connected to the power input pins and power output pins of the internal LED driver chip, respectively, thereby supplying a power signal to the LED light-emitting unit via the LED driver chip. An LED panel characterized in that, within the same LED string, the power output port and 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.

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

20. Each LED light bead further includes a power gate circuit located between the power input port and the power input pin. The LED panel according to claim 19, characterized in that the power gate circuit, when it detects 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 input pin, or when 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, conducts the power line on which the power signal is present 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 multiple LED light beads, each LED light bead is provided with a power input port and a power output port, and an LED driver chip and an LED light-emitting unit are packaged inside the LED light bead. 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 in each LED string, and is used to supply power signals to the LED light beads. Each LED light bead's power input port and power output port are electrically connected to the power input pins and power output pins of the internal LED driver chip, respectively, thereby supplying a power signal to the LED light-emitting unit via the LED driver chip. An LED display screen characterized in that, in each LED panel, the power input port and power output port 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 multiple LED strings are arranged in a matrix, LED light beads of the same LED string are in the same column, LED light beads of the same position in different LED strings are in the same row, and serial power supply lines between two adjacent rows of LED light beads are connected in parallel to form a parallel power supply line. or, The LED display screen according to claim 21, wherein the LED panel is arranged in a matrix, LED light beads of the plurality of LED strings are in the same row, LED light beads of the same LED string are in the same column, LED light beads of the same position in different LED strings are in the same column, and serial power supply lines between two adjacent rows of LED light beads are connected in parallel to form a parallel power supply line.

23. In the aforementioned LED panel, each LED light bead further includes a power gate circuit provided between the power input port and the power input pin. The LED display screen according to claim 22, characterized in that the power gate circuit, when it detects 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 input pin, or when 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, conducts the power line on which the power signal is present to the power input pin.

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