LED lamp string, LED lamp panel and LED display screen

Abstract

The embodiment of the utility model provides an LED lamp string, an LED lamp panel and an LED display screen. In the embodiment of the invention, the first signal input port and the second signal output port of the LED lamp bead are directly and electrically connected to form the first breakpoint continuous transmission line, so that the data signal can still be transmitted to the next LED lamp bead when the LED driving chip fails. A second breakpoint continuous transmission line is formed by electrically connecting a second signal output port and a second signal input port between a first LED lamp bead and a second LED lamp bead which are spaced by at least two LED lamp beads, so that when a plurality of continuous LED lamp beads break down, the data signals can be continuously transmitted to the second LED lamp bead and subsequent LED lamp beads. Furthermore, a serial power supply mode is adopted to save energy consumption; furthermore, a series-parallel mixed mode is adopted, so that the problem of subsequent LED power failure caused by failure of a certain LED lamp bead can be avoided, and the reliability of the LED display screen is improved.

Description

TECHNICAL FIELD

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

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

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

[0004] In the above LED light bar screen, there are the following problems: in the same LED lamp string, if part of the LED lamp beads fail, the subsequent LED lamp beads cannot normally receive the data signal. Invention content

[0005] The present application provides an LED lamp string, an LED lamp panel and an LED display screen, which form a breakpoint continuation circuit in the LED lamp string, solve the problem that the subsequent LED lamp beads cannot normally receive the data signal due to the failure of the front LED lamp beads, and improve the reliability of the LED display screen.

[0006] The embodiment of the present application provides a LED lamp string, comprising: a plurality of LED lamp beads connected in series; each LED lamp bead is provided with a first signal input port and a first signal output port, a second signal input port and a second signal output port, and an LED driving chip and an LED light emitting unit are packaged in the LED lamp bead, wherein: the first signal input port, the second signal input port, the first signal output port and the second signal output port of each LED lamp bead are electrically connected with a first signal input pin, a second signal input pin, a first signal output pin and a second signal output pin of the internal LED driving chip respectively, so as to transmit a data signal to the LED light emitting unit through any signal input pin of the LED driving chip; the first signal output port and the second output port of adjacent LED lamp beads are electrically connected with the first signal input port and the second signal input port respectively, so as to form a serial signal line; and the first signal input port and the second signal output port of each LED lamp bead are directly electrically connected to form a first breakpoint continuation line by skipping the internal LED driving chip.

[0007] In an optional embodiment, the second signal output port of the first LED lamp bead and the second signal input port of the second LED lamp bead are electrically connected to form a second breakpoint continuation line; wherein the first LED lamp bead is any LED lamp bead on the LED lamp string, and the second LED lamp bead is spaced apart from the first LED lamp bead by at least two LED lamp beads.

[0008] In an optional embodiment, the first LED lamp bead and the second LED lamp bead form a lamp bead group, and a plurality of lamp bead groups exist on the LED lamp string, and different lamp bead groups have different first LED lamp beads and second LED lamp beads.

[0009] In an optional embodiment, the LED driving chip comprises: a monitoring circuit electrically connected with the first signal input pin and the second signal input pin, an analysis circuit electrically connected with the monitoring circuit, and a driving circuit electrically connected with the analysis circuit; wherein the monitoring circuit outputs the data signal and a pin identification of any signal input pin to the analysis circuit in the case that the data signal is received by the any signal input pin; the analysis circuit analyzes a data segment corresponding to the LED light emitting unit from the data signal according to an analysis mode corresponding to the pin identification, and outputs the data segment to the driving circuit; the driving circuit performs display control on the LED light emitting unit according to the data segment; wherein different signal pins correspond to different analysis modes.

[0010] In an optional embodiment, each LED lamp bead is further provided with a power input port and a power output port; the power input port and the power output port of each LED lamp bead are electrically connected with the power input pin and the power output pin of the internal LED driving chip respectively, so as to provide power signals for the LED light unit through the LED driving chip; the power output port and the power input port of adjacent LED lamp beads are electrically connected to form a serial power supply circuit; the power input port of the first LED lamp bead of the LED lamp string is electrically connected with a power supply end, and the power output port of the tail LED lamp bead of the LED lamp string is electrically connected with a grounding end.

[0011] The embodiment of the present application further provides an LED lamp panel, comprising a plurality of LED lamp strings provided by the embodiment of the present application.

[0012] In an optional embodiment, the serial power supply circuits between adjacent two LED lamp strings are connected in parallel to form a parallel power supply circuit.

[0013] In an optional embodiment, the LED lamp beads in the plurality of LED lamp strings are arranged in a row-column mode, the LED lamp beads in the same LED lamp string are located in the same column, the LED lamp beads at the same position in different LED lamp strings are located in the same row, and the serial power supply circuits between adjacent two rows of LED lamp beads are connected in parallel to form a parallel power supply circuit; or, the LED lamp beads in the plurality of LED lamp strings are arranged in a row-column mode, the LED lamp beads in the same LED lamp string are located in the same row, the LED lamp beads at the same position in different LED lamp strings are located in the same column, and the serial power supply circuits between adjacent two columns of LED lamp beads are connected in parallel to form a parallel power supply circuit.

[0014] In an optional embodiment, each LED lamp bead further comprises a power gating circuit arranged between the power input port and the power input pin; when the power gating circuit detects that there are power signals on the serial power supply circuit and the parallel power supply circuit at the same time, the power gating circuit communicates the serial power supply circuit with the power input pin; or, when the power gating circuit detects that there is a power signal on one of the serial power supply circuit and the parallel power supply circuit and there is no power signal on the other one, the power gating circuit communicates the power supply circuit with the power input pin which has the power signal.

[0015] The embodiment of the present application further provides an LED display screen, comprising a controller and at least two LED lamp panels provided by the embodiment of the present application; the at least two LED lamp panels are spliced together in sequence to form the LED display screen; the controller is arranged at the top and / or the bottom of the LED display screen; wherein the signal flow directions of the at least two LED lamp panels are the same, or the signal flow directions of at least part of adjacent LED lamp panels in the at least two LED lamp panels are opposite.

[0016] In the embodiment of the present application, by directly electrically connecting between the first signal input port and the second signal output port of the LED lamp bead, a first breakpoint transmission circuit is formed, ensuring that the data signal can still be transmitted to the next LED lamp bead when the LED driving chip fails, solving the problem that the data signal cannot be transmitted to the subsequent LED lamp bead due to the failure of a certain LED lamp bead.

[0017] Further optionally, by electrically connecting between the second signal output port and the second signal input port between the first LED lamp bead and the second LED lamp bead spaced by at least two LED lamp beads, a second breakpoint transmission circuit is formed, so that when multiple consecutive LED lamp beads fail, the data signal can still continue to be transmitted to the second LED lamp bead and the subsequent LED, solving the problem that the data signal cannot continue to be transmitted to the subsequent LED lamp bead after multiple consecutive LED lamp beads fail.

[0018] Further optionally, for the LED lamp string, a serial power supply mode can be used to save energy consumption.

[0019] Further optionally, for the LED lamp panel and the LED display screen, a serial-parallel hybrid power supply mode is used, which can solve the problem of power failure of the subsequent LED lamp bead caused by the failure of a certain LED lamp bead in the serial power supply mode, minimize the number of LED lamp beads that fail to power, reduce the risk of failure of the entire LED display screen, and improve the reliability of the LED display screen. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1a A structure schematic diagram of an LED lamp bead is provided for the exemplary embodiments of the present application;

[0022] Figure 1b Another structure schematic diagram of an LED lamp bead is provided for the exemplary embodiments of the present application;

[0023] Figure 2a A structure schematic diagram of an LED lamp string is provided for the exemplary embodiments of the present application;

[0024] Figure 2b Another structure schematic diagram of an LED lamp string is provided for the exemplary embodiments of the present application;

[0025] Figure 2c Another structure schematic diagram of an LED lamp string is provided for the exemplary embodiments of the present application;

[0026] Figure 2dAnother LED lamp string structure schematic diagram provided by an exemplary embodiment of the present application;

[0027] Figure 3a An LED lamp panel structure schematic diagram provided by an exemplary embodiment of the present application is serially powered;

[0028] Figure 3b An LED lamp panel structure schematic diagram provided by an exemplary embodiment of the present application is serially and parallelly powered;

[0029] Figure 4a An LED display screen structure schematic diagram provided by an exemplary embodiment of the present application;

[0030] Figure 4b Another LED display screen structure schematic diagram provided by an exemplary embodiment of the present application;

[0031] Figure 4c Another LED display screen structure schematic diagram provided by an exemplary embodiment of the present application;

[0032] Figure 4d Another LED display screen structure schematic diagram provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in connection with the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0034] In view of the technical problem that, in the same LED lamp string, due to the failure of part of LED lamp beads, the subsequent LED lamp beads cannot normally receive data signals, in the embodiments of the present application, by directly electrically connecting between the first signal input port and the second signal output port of the LED lamp bead, a first breakpoint transmission circuit is formed, so as to ensure that the data signal can be transmitted to the next LED lamp bead when the LED driving chip fails, and the problem that the data signal cannot be transmitted to the subsequent LED lamp beads due to the failure of a certain LED lamp bead is solved.

[0035] Further optionally, in the embodiment of the present application, the second breakpoint continuation circuit is formed by electrically connecting the second signal output port and the second signal input port between the first LED lamp bead and the second LED lamp bead which are spaced by at least two LED lamp beads, so that the data signal can continue to be transmitted to the second LED lamp bead and the subsequent LED when a plurality of continuous LED lamp beads fail, solving the problem that the data signal cannot continue to be transmitted to the subsequent LED lamp bead after a plurality of continuous LED lamp beads fail.

[0036] Further optionally, in the embodiment of the present application, the serial power supply mode is adopted for the LED lamp string, which can save power consumption.

[0037] Further optionally, in the embodiment of the present application, the serial-parallel hybrid power supply mode is adopted for the LED lamp panel and the LED display screen, which can solve the problem that the subsequent LED lamp bead is powered off due to the failure of a certain LED lamp bead in the serial power supply mode, and can minimize the number of LED lamp beads that are powered off, the LED display screen is formed by splicing at least two LED lamp panels, the LED lamp beads in the LED lamp panel are connected to the serial power supply lines of adjacent rows or columns in parallel to form parallel power supply lines, and the power supply gating circuit in each LED lamp bead can intelligently select the power supply line, thereby reducing the risk of reducing the entire LED display screen to failure due to the failure of part of the LED lamp beads, and improving the reliability of the LED display screen.

[0038] The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] Figure 1a A structure diagram of an LED lamp bead provided by an exemplary embodiment of the present application is shown in FIG. 1. Figure 1a As shown in FIG. 1, the present application provides a new LED lamp bead structure, i.e. an LED lamp bead 100, which encapsulates an LED driving chip 10 and an LED emitting unit 20 inside.

[0040] The LED emitting unit 20 is a basic light emitting component, which is composed of one or more LED chips and related auxiliary elements. The LED emitting unit 20 is the core part of light output, which is a diode made of semiconductor material that emits light when current passes through; the semiconductor materials that can be used include but are not limited to gallium arsenide (GaAs), gallium nitride (GaN), aluminum gallium indium phosphide (AlGaInP), etc.

[0041] The LED driving chip 10 is an integrated circuit specially used for controlling and driving the LED light-emitting unit, and its main function is to ensure the LED light-emitting unit 20 to operate under safe and efficient working conditions, and to provide various additional functions to meet the needs of different application scenarios, such as but not limited to: display control of the LED light-emitting unit 20, power supply control of the LED light-emitting unit 20, etc. Among them, the display control of the LED light-emitting unit 20 includes but is not limited to: providing data signals for the LED light-emitting unit 20, dimming control of the LED light-emitting unit 20, etc.; the power supply control of the LED light-emitting unit 20 includes but is not limited to: providing power supply current for the LED light-emitting unit 20, and overvoltage protection (to prevent high input voltage from damaging the LED light-emitting unit), overcurrent protection (to prevent excessive current from causing the LED light-emitting unit to overheat or be damaged), short-circuit protection (when the circuit is short-circuited, the power supply is automatically cut off to protect the safety of the LED light-emitting unit), etc.

[0042] The LED driving chip 10 and the LED light-emitting unit 20 each have multiple pins, and the interconnection relationship between these pins is the basis for the LED driving chip 10 to control and drive the LED light-emitting unit 20 to emit light. These pins are electrically connected to each other through circuit design, allowing the LED driving chip 10 to transmit data signals to the LED light-emitting unit 20, which are used to control the behavior of the LED light-emitting unit 20. Different signal inputs are set to control different behaviors of the LED light-emitting unit 20, including but not limited to brightness adjustment, color correction, temperature compensation, etc. The signal driving form of these data signals can be diverse, as long as it can meet the needs of LED display. In the embodiments of the present application, this is not limited. For example, the signal driving can be simple clock driving for synchronizing data signals, data driving for transmitting image or text information, or control driving for adjusting the on-off state and brightness level of the LED. This design allows the LED light-emitting unit 20 to accurately reproduce various images and video content, providing a rich and colorful visual experience. In the embodiments of the present application, the internal implementation structure and pins of the LED driving chip 10 are not limited, and similarly, the internal implementation structure and pins of the LED light-emitting unit 20 are not limited. In the following, only the pins of the LED driving chip 10 and the LED light-emitting unit 20 are exemplarily described from the functional point of view:

[0043] The LED driver chip 10 has pins including, but not limited to: 1. Power input pin V1, used to connect to an external power signal; 2. Ground pin, which can serve as the circuit's ground wire, used for reference potential, and connected to an external common ground wire; 3. Dimming control pin, used to receive dimming signals, such as PWM signals or analog voltages, to adjust the LED brightness; 4. Enable pin, used to control the on and off states of the LED driver chip 10; 5. Power output pin V2, used to provide driving current to the LED light-emitting unit 20; 6. Communication interface pin, used to realize digital communication between the LED light-emitting unit 20 and external devices. In this embodiment, 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, as an example.

[0044] The pins of the LED light-emitting unit 20 include, but are not limited to: 1. A positive pin, serving as the positive terminal of the LED, used to receive current flow, and can be connected to the power output pin V2 of the LED driver chip 10. 2. A negative pin, serving as the negative terminal of the LED, responsible for current outflow, and can be connected to the power output pin V2 of the LED driver chip 10, or directly connected to the ground wire. 3. A communication pin, used to connect to the communication interface pins of the LED driver chip 10, such as signal control pins, for receiving data signals and displaying them.

[0045] In this embodiment, to facilitate the provision of data signals from an external source (e.g., the controller of an LED display screen) to the LED driver chip 10, these data signals refer to the display data required to control the LED beads for display. For example... Figure 1a As shown, the LED bead 100 has a first signal input port DI, a first signal output port DO, a second signal input port FDI, and a second signal output port FDO. 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 another data signal transmission line. Through these two transmission lines, the LED driver chip 10 can transmit data signals to the LED light-emitting unit 20 for display control of the LED light-emitting unit 20.

[0046] Further, the first signal output port DO and the second output port FDO of the LED lamp bead 100 are respectively electrically connected with the first signal input port DI and the second signal input port FDI of the next LED lamp bead 100 in the LED lamp string to which the LED lamp bead 100 belongs, that is, the electrical connection between the corresponding signal input ports and the signal output ports of the adjacent LED lamp beads 100 can form a serial signal line, which is used to ensure that the data signal can be continuously transmitted to the subsequent LED lamp beads 100.

[0047] For each LED lamp bead 100, the data signal can enter the first signal input pin P1 of the LED driving chip through the first signal input port DI, flow into the first signal output port DO through the first signal output pin M1 of the LED driving chip 10, and then enter the next LED lamp bead 100 through the first signal input port DI of the next LED lamp bead 100 for serial transmission; or the data signal can enter the second signal input pin P2 of the LED driving chip through the second signal input port FDI of the LED lamp bead 100, flow into the second signal output port FDO through the second signal output pin M2 of the LED driving chip, and then enter the next LED lamp bead 100 through the second signal input port FDI of the next LED lamp bead 100 for serial transmission. As can be seen, the above two transmission lines both pass through the LED driving chip 10, and if the LED driving chip 10 fails or the LED lamp bead 100 fails, the data signal will not be able to continue to be transmitted to the subsequent lamp beads.

[0048] In order to improve the fault tolerance of the data signal transmission between the LED lamp beads 100, in the embodiment of the present application, a first breakpoint transmission line is additionally arranged between the first signal input port DI and the second signal output port FDO of the LED lamp bead 100, that is, the LED driving chip 10 is directly electrically connected between the first signal input port DI and the second signal output port FDO, for example, the first signal input port DI and the second signal output port FDO can be directly electrically connected by wires, or a wire (or a wiring) that does not pass through the LED driving chip can be added between the first signal input port DI and the second signal output port FDO on the PCB board on which the LED lamp bead 100 is located, and the first signal input port DI and the second signal output port FDO are directly electrically connected through the wire, thereby forming the first breakpoint transmission line between the first signal input port DI and the second signal output port FDO.

[0049] In the case of increasing the first breakpoint transmission line, if the LED driving chip 10 in the LED lamp bead 100 fails (or the LED lamp bead 100 fails), as the first signal input port DI of the LED lamp bead 100 cannot transmit the data signal to the first signal input pin P1 of the LED driving chip through the first signal transmission line, the first signal output pin M1 of the LED driving chip, the first signal output port DO of the LED lamp bead 100, the second signal input port FDI of the LED lamp bead 100, the second signal input pin P2 of the LED driving chip, the second signal output pin M2 of the LED driving chip, and the second signal output port FDO of the LED lamp bead 100, the data signal can be transmitted to the subsequent LED lamp bead 100 through the first breakpoint transmission line (in the case of skipping the LED driving chip) between the first signal input port DI and the second signal output port FDO of the LED lamp bead 100, ensuring the stable operation of the entire LED lamp string and reducing the failure of the entire LED lamp string due to the failure of a single LED lamp bead 100 or driving chip.

[0050] Figure 1b Another structure diagram of an LED lamp bead 100 is provided for the exemplary embodiments of the present application. As shown in Figure 1b The LED lamp bead 100 is also provided with a power input port Vin and a power output port Vout, and the power input port Vin and the power output port Vout of the LED lamp bead 100 are electrically connected with the power input pin V1 and the power output pin V2 of the LED driving chip 10, respectively, to provide the power signal for the LED light unit 20 through the LED driving chip 10. In addition, the power output port Vout of the current LED lamp bead 100 is electrically connected with the power input port Vin of the next LED lamp bead 100, thereby forming a serial power supply line between adjacent LED lamp beads 100. Through the serial power supply line, the same power supply can be used to supply power to the serially connected multiple LED lamp beads 100, and the voltage provided by the power supply will be distributed among the multiple LED lamp beads 100, which is beneficial to fully utilize the power supply resources and reduce the power consumption. Alternatively, in the case that the loads of the multiple LED lamp beads 100 are the same, the multiple LED lamp beads 100 can equally divide the voltage signal provided by the power supply, for example, the power supply voltage is 20 volts, and the voltage of each LED lamp bead 100 is 5 volts, then five LED lamp beads 100 can be connected in series.

[0051] On the basis of the above Figure 1a Or Figure 1b The present application further provides an LED lamp string. Figure 2a A structure diagram of an LED lamp string is provided for the exemplary embodiments of the present application. As shown in Figure 2aAs shown, an LED light string includes a plurality of LED light beads 100 connected in series. The series connection here includes serial transmission of data signals and serial transmission of power signals. The number of LED light beads 100 included in the LED light string is not limited, for example, it can be 10, 30, 50, 100, etc., and can be determined according to the application scenario or the size of the display screen. The LED light string in the embodiment of the present application Figure 2a is taken as an example with 11 LED light beads 100, but is not limited thereto. The implementation 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, a second signal input port and a second signal output port, and an LED driving chip and an LED light emitting unit are packaged inside the LED light bead 100. In the LED light 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 the controller outputs data signals, the first signal input port and / or the second signal input port of the first LED light bead 100 receives these data signals, and then transmits these signals to the next LED light bead 100 through the first signal output port and / or the second signal output port thereof. Such a series connection mode ensures that data signals can be transmitted in sequence from one LED light bead 100 to the next, until the last LED light bead of the entire LED light string.

[0052] In the embodiment of the present application, each LED light bead 100 of the LED light string has two signal input ports (DI and FDI) and two signal output ports (DO and FDO). Each LED light bead 100 is internally packaged with an LED driving chip and an LED light emitting unit. A path called "first breakpoint transmission line" is formed between the first signal input port (DI) and the second signal output port (FDO) of each LED light bead 100 through direct electrical connection. When the LED driving chip is working normally, data signals enter the LED light bead 100 through DI or FDI, and after being processed by the LED driving chip, they are transmitted to the next light bead through DO or FDO. However, if the LED driving chip fails, data signals will not be able to be output through DO or FDO. At this time, since there is a direct electrical connection between DI and FDO, data signals can directly jump over the faulty LED driving chip from DI and be transmitted to the next LED light bead 100 through FDO. In this way, even if the LED driving chip of a certain LED light bead 100 fails, data signals can still continue to be transmitted to the next LED light bead 100, and the data transmission of the entire LED light string can still continue.

[0053] In addition, the power input terminal Vin of each LED lamp bead 100 receives the power signal provided by the controller and transmits it to the power input terminal Vin of the next LED lamp bead 100 through the power output port Vout, forming a serial connection of the power signal. Such a design makes the power supply from the power supply end to each LED lamp bead 100 continuous and stable.

[0054] Figure 2b Another structure diagram of an LED lamp string is provided for the exemplary embodiments of the present application. Figure 2b In Figure 2a On the basis of the LED lamp string shown, the second signal output port of the first LED lamp bead 100 in the LED lamp string and the second signal input port of the second LED lamp bead 100 are electrically connected, thereby forming a second break continuation circuit, so that when two or more LED lamp beads 100 between the first LED lamp bead 100 and the second LED lamp bead 100 fail, the data signal can still be transmitted to the second LED lamp bead 100 and the subsequent LED lamp beads 100. The first LED lamp bead 100 is any LED lamp bead 100 on the LED lamp string, and the second LED lamp bead 100 is spaced apart from the first LED lamp bead 100 by at least two LED lamp beads 100.

[0055] For ease of description, the first LED lamp bead 100 and the second LED lamp bead 100 can form a lamp bead group, and the first LED lamp bead 100 and the second LED lamp bead 100 in a lamp bead group are spaced apart by at least two LED lamp beads 100, for example, there can be 2 LED lamp beads 100, or there can be 3, 4 or more LED lamp beads 100. In Figure 2b In the above, taking the case of spacing 2 LED lamp beads 100 between the first LED lamp bead 100 and the second LED lamp bead 100 as an example for illustration, but it is not limited thereto.

[0056] One or more lamp bead groups can exist on one LED lamp string. In the case that multiple lamp bead groups exist on one LED lamp string, different lamp bead groups have different first LED lamp beads 100 and second LED lamp beads 100. When two or more LED lamp beads 100 between the first LED lamp bead 100 and the second LED lamp bead 100 fail, the failed LED lamp beads 100 cannot transmit data signals to subsequent LED lamp beads through the serial transmission line between the failed LED lamp beads 100 and the next LED lamp bead 100, but can transmit data signals to the next LED lamp bead 100 through the first breakpoint transmission line. Further, when the next LED lamp bead 100 also fails, data signals cannot be transmitted to subsequent LED lamp beads through the first breakpoint transmission line in the next LED lamp bead 100. However, due to the existence of the second breakpoint transmission line, data signals can be directly sent from the second signal output port of the first LED lamp bead 100 to the second signal input port of the second LED lamp bead 100 through the second breakpoint transmission line, thereby ensuring that data signals can continue to be transmitted to the second LED lamp bead 100 and subsequent LED lamp beads. The second breakpoint transmission line can directly skip the failed LED lamp beads 100 in the middle, ensuring that data signals can continue to be transmitted to the second LED lamp bead 100 and subsequent LED lamp beads 100, allowing local LED lamp beads 100 in the LED lamp string to fail without causing the entire LED lamp string to fail, thereby improving the performance of the LED lamp string.

[0057] For example, in the first lamp bead group shown in FIG. 1, there are two LED lamp beads 100 between the first LED lamp bead 100 and the second LED lamp bead 100. The second signal output port of the first LED lamp bead 100 and the second signal input port of the second LED lamp bead 100 are electrically connected to form a second breakpoint transmission line. When the first LED lamp bead 100 behind the first LED lamp bead 100 fails, data signals can be transmitted to the LED lamp bead 100 behind the failed LED lamp bead 100 through the first breakpoint transmission line. However, when two LED lamp beads 100 behind the first LED lamp bead 100 fail, data signals cannot be transmitted through the first breakpoint transmission line. At this time, data signals can be transmitted from the first LED lamp bead 100 to the second LED lamp bead 100 through the second breakpoint transmission line, bypassing the two failed LED lamp beads. Figure 2b As shown in FIG. 1, the first LED lamp bead 100 and the second LED lamp bead 100 in the first lamp bead group, the second lamp bead group, and the third lamp bead group are not the same.

[0058] In the embodiments of the present application, different first LED lamp beads 100 and second LED lamp beads 100 exist in different lamp bead groups in the LED lamp string. As shown in FIG. 1, the first LED lamp bead 100 and the second LED lamp bead 100 in the first lamp bead group, the second lamp bead group, and the third lamp bead group are not the same. Figure 2b As shown in FIG. 1, the first LED lamp bead 100 and the second LED lamp bead 100 in the first lamp bead group, the second lamp bead group, and the third lamp bead group are not the same.

[0059] In the embodiments of the present application, the position relationship between the first LED lamp bead 100 in one lamp bead group and the second LED lamp bead 100 in another lamp bead group is not limited. In an optional embodiment, in the adjacent two lamp bead groups of the LED lamp string, the first LED lamp bead 100 in the latter lamp bead group is the LED lamp bead 100 in front of the second LED lamp bead 100 in the former lamp bead group, but is different from the first LED lamp bead 100 in the former lamp bead group, so that the adjacent lamp bead groups are staggered, which is beneficial to solve the problem of further reducing the influence of the failed LED lamp bead 100. In another optional embodiment, in the adjacent two lamp bead groups of the LED lamp string, the first LED lamp bead 100 in the latter lamp bead group is the second LED lamp bead 100 or the LED lamp bead 100 behind the second LED lamp bead 100 in the former lamp bead group, so that the adjacent lamp bead groups appear in sequence without staggering.

[0060] Further optionally, when there is only one LED lamp bead 100 between the adjacent two second breakpoint continuation circuits in the LED lamp string, the lamp bead is the second LED lamp bead 100 in the former lamp bead group in the adjacent lamp bead group, and is also the first LED lamp bead 100 in the latter lamp bead group. When there are at least two LED lamp beads 100 between the adjacent two second breakpoint continuation circuits in the LED lamp string, the first LED lamp bead 100 of the latter lamp bead group in the adjacent lamp bead group is the LED lamp bead 100 behind the second LED lamp bead 100 of the former lamp bead group. As shown in Figure 2b the first lamp bead group and the second lamp bead group, and the first LED lamp bead 100 in the third lamp bead group is the LED lamp bead 100 behind the second LED lamp bead 100 in the second lamp bead group.

[0061] In the embodiments of the present application, the number of LED lamp beads 100 spaced between the first LED lamp bead 100 and the second LED lamp bead 100 in different LED lamp bead groups can be the same or different. The number of LED lamp beads 100 spaced between the first LED lamp bead 100 and the second LED lamp bead 100 in the LED lamp bead group can be adjusted according to different application scenarios, including the voltage requirement of each LED lamp bead 100 or the failure probability of the LED lamp bead 100, and the embodiments of the present application do not limit this. For example, in the application scenario, the voltage of the LED lamp beads 100 in the LED lamp string needs to be the same, so the number of LED lamp beads 100 spaced between the first LED lamp bead 100 and the second LED lamp bead 100 in different LED lamp bead groups in the LED lamp string is the same; in the application scenario, the first LED lamp bead group is a high-voltage LED lamp bead 100, and the second LED lamp bead group is a low-voltage LED lamp bead 100, so that the first LED lamp bead 100 and the second LED lamp bead 100 in the first LED lamp bead group are spaced by two LED lamp beads 100, and the first LED lamp bead 100 and the second LED lamp bead 100 in the second LED lamp bead group are spaced by five LED lamp beads 100, so that the number of LED lamp beads spaced between the first LED lamp bead and the second LED lamp bead in different LED lamp bead groups of the LED lamp string is different.

[0062] Figure 2c Another structure diagram of an LED lamp string is provided for the exemplary embodiments of the present application. Compared with the LED lamp string shown in Figure 2a and Figure 2b , the lamp string shown in Figure 2c shows the partial structure inside the LED lamp bead 100. As shown in Figure 2c , the LED lamp string includes a plurality of LED lamp beads 100, and the plurality of LED lamp beads 100 are connected in series. The series connection relationship between the plurality of LED lamp beads 100 and the data signal transmission line are the same as those in the foregoing embodiments, and will not be described again here. Similarly, the internal structure of each LED lamp bead 100 is also the same as that of the LED lamp bead 100 in the foregoing embodiments, and will not be described again here.

[0063] Further optionally, in the LED lamp string shown in Figure 2c , the LED driving chip in the LED lamp bead 100 includes a monitoring circuit electrically connected to the first signal input pin and the second signal input pin of the LED driving chip, an analysis circuit electrically connected to the monitoring circuit, and a driving circuit electrically connected to the analysis circuit; wherein the monitoring circuit is used to monitor whether a data signal is received on the first signal input pin and the second signal input pin, and in the case that any signal input pin receives a data signal, the monitoring circuit outputs the data signal and the pin identification of the any signal input pin receiving the data signal to the analysis circuit.

[0064] It is explained that data signals can be received on both signal input pins. Alternatively, if data signals are received on the two signal input pins successively, the data signal received earlier is taken as the main one, and the signal input pin receiving the data signal earlier is taken as the main pin, and the pin identification of the main pin and the data signal output value received on the main pin are parsed; and the signal input pin receiving the data signal later is taken as the backup pin, and the data signal received on the backup pin is discarded. Alternatively, if data signals are received on the two signal input pins simultaneously, the first signal input pin is taken as the main pin, and the pin identification of the main pin and the data signal output value received on the main pin are parsed; and the second signal input pin is taken as the backup pin, and the data signal received on the backup pin is discarded.

[0065] Different pin identifications correspond to different signal input pins, and the data signals received on different signal input pins can be different, which is related to the processing mode of the LED driving chip (specifically, the driving circuit in the LED driving chip) to the data signal. In an optional embodiment, the LED driving chip (specifically, the driving circuit in the LED driving chip) in each LED lamp bead 100 is responsible for parsing the data segment required by the LED lamp bead 100 from the received data signal, and driving the LED light unit in the LED lamp bead 100 to emit light using the data segment; then, the data signal with the remaining data segment is sent to the subsequent LED lamp bead 100. In this embodiment, it can be known from the first breakpoint continuation circuit and / or the second breakpoint continuation circuit provided in the foregoing embodiment that the remaining data segment included in the data signal coming from different signal input pins will be different, which leads to different processing modes of the LED driving chip in the subsequent LED lamp bead 100. Therefore, in the embodiments of the present application, different parsing modes are implemented for different signal input pins, and the parsing circuit adopts a suitable parsing mode to parse the data segment required by the LED lamp bead 100 to which it belongs from the received data signal.

[0066] Specifically, the parsing circuit is used to receive the pin identification and the data signal output by the monitoring circuit, parse the data segment corresponding to the LED light unit from the data signal according to the parsing mode corresponding to the pin identification, and output the data segment to the driving circuit; these data segments contain specific information on how to control the LED light unit, such as display attributes such as brightness adjustment or color change. The driving circuit controls the LED light unit according to the data segment, so that the LED lamp bead 100 emits light in the expected manner.

[0067] Correspondingly, the analyzing manner is to parse the data segment required by the LED lamp bead 100 from the corresponding position in the received data signal according to the series connection order between each LED lamp bead 100, if the pin identification output by the monitoring circuit corresponds to the first signal input pin; the analyzing manner not only needs to parse the data segment required by the LED lamp bead 100 from the corresponding position in the received data signal according to the series connection order between each LED lamp bead 100, but also can delete other data segments (these data segments correspond to the faulty LED lamp bead 100, and belong to invalid data segments) before the data segment, if the pin identification output by the monitoring circuit corresponds to the second signal input pin, so as to reduce the data amount of subsequent transmission and save transmission and processing resources. It is explained here that the processing manner of the data signal by the LED driving chip and the corresponding analyzing manner are only exemplary and are not limited thereto, and the embodiments of the present application do not limit the same.

[0068] In the embodiments of the present application, the LED driving chip includes a monitoring circuit, an analyzing circuit and a driving circuit. The monitoring circuit ensures that the data signal can be correctly recognized and transmitted regardless of the pin from which the data signal is input; the analyzing circuit processes the data according to the specific analyzing manner of different pins to ensure the correct extraction of the data segment; and the driving circuit accurately controls the LED light emitting unit according to the analyzed data segment to achieve the expected display effect. The whole process realizes seamless connection from signal monitoring and analysis to final control, allows the same LED driving chip to flexibly control the LED light emitting unit according to different input signals, ensures the accuracy and efficiency of signal processing, and also improves the control flexibility and performance of the LED lamp string.

[0069] In actual application, the controller can be used to control the power supply of the LED lamp beads 100 in the plurality of LED light strips. In the power supply control, a constant voltage power supply mode can be used to supply power to the plurality of LED lamp beads 100 in the same LED light strip in parallel to reduce the mutual influence between the LED lamp beads 100. However, this parallel power supply mode has some problems, although it can keep the brightness of all LED lamps consistent, and even if one of the lamp beads fails, the other lamp beads can still work normally. For example, in the parallel power supply mode, in order to ensure the safety of the LED lamp beads 100, a current limiting resistor needs to be configured for each LED lamp bead 100 to limit the current, and these resistors will generate heat and consume energy, especially as the number of LED lamp beads 100 increases, the energy consumption of the LED lamp beads 100 will also increase.

[0070] To solve the above problems, the embodiments of the present application also provide an LED lamp string using a serial power supply mode. As shown in FIG. 6, the LED lamp string includes a plurality of LED light strips 100 and a controller 200. The controller 200 is connected to the plurality of LED light strips 100 through a serial communication bus 300, and is used to control the power supply of the LED lamp beads 100 in the plurality of LED light strips 100. Figure 2dAs shown, a series power supply method is used for LED light strings. This means that all LED beads 100 in the LED string are located on the same series power supply line and are powered uniformly by the same power supply. Each LED bead 100 has the same current, ensuring consistent brightness and avoiding uneven brightness caused by current differences. Furthermore, with series power supply, there is no need to configure a separate current-limiting resistor for each LED bead 100, reducing energy consumption, especially as the number of LED beads 100 increases, resulting in significant energy savings. Moreover, compared to parallel power supply, series power supply only requires a single constant current source to power the entire LED light string, reducing the complexity of the driver chip. Finally, compared to parallel power supply, each LED bead 100 in series power supply carries a relatively lower current, reducing the heat generated by individual LEDs, which not only reduces energy consumption but also helps extend the lifespan of the LEDs.

[0071] In the serial power supply method, each LED 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 the power output port Vout of each LED bead 100 are electrically connected to the power input pin V1 and the power output pin V2 of the internal LED driver chip, respectively, so as to provide power signals to the LED light-emitting unit through the LED driver chip. In adjacent LED beads 100, the power output port Vout of the previous LED bead 100 is electrically connected to the power input port Vin of the next LED bead 100 to form a serial power supply line. The power input port Vin of the first LED bead 100 in the LED string is electrically connected to the power supply terminal, and the power output port Vout of the last LED bead 100 in the LED string is electrically connected to the ground terminal.

[0072] Furthermore, embodiments of this application also provide an LED light board including the aforementioned LED beads 100 or LED strings. Figure 3a This is a schematic diagram of a serially powered LED light board structure provided as an exemplary embodiment of this application. (See diagram below.) Figure 3a As shown, an LED light panel includes multiple LED light strings. The number of light strings included in the LED light panel is not limited; for example, it can be 2, 5, 6, 10, 20, 30, etc., and of course, it can be more or less, depending on the application scenario and the size of the display space. For example, in... Figures 3a-3b ,as well as Figures 4a-4d The illustrations typically use four LED strings per LED panel as an example, but are not limited to this. Each LED string in the LED panel is related to... Figure 2a or Figure 2b or Figure 2c or Figure 2dThe structure of the LED light strings shown is the same and will not be described again here. In an optional embodiment, the data signals in the LED light board can be provided by a controller. The controller includes multiple communication ports, which are respectively connected to the first signal input port and the second signal input port of the first LED bead 100 in the multiple LED light strings, for providing data signals to the LED light strings. This application does not focus on the implementation structure of the controller; any controller structure capable of providing data signals to the LED light board is applicable to this application. This application does not limit the location of the controller; the controller can be located at the top or bottom of the display screen where the LED light board is located, or the controller can be simultaneously located at the top and bottom of the LED display screen where the LED light board is located.

[0073] Further optional, such as Figure 3a As shown, the LED light board also includes a power supply terminal and a ground terminal. The power supply terminal can be understood as the power source, and the ground terminal can be understood as the ground signal, used to power the LED strings in the LED light board. Accordingly, each LED bead 100 in the LED light board is also provided with a power input port Vin and a power output port Vout. Among the multiple LED strings in the LED light board, the power input port Vin of the first LED bead 100 is connected in parallel to the power supply terminal, and the power output port Vout of the last LED bead 100 in the multiple LED strings is connected in parallel to the ground terminal. The LED beads 100 on the same LED string are located on the same serial power supply line and are all powered by the power supply terminal of the controller.

[0074] Furthermore, the power input port Vin and power output port Vout of each LED bead 100 are electrically connected to the power input pin V1 and power output pin V2 of the internal LED driver chip, respectively, so as to provide power signals to the LED light-emitting unit through the LED driver chip; among adjacent LED beads 100 in the same LED string, the power output port Vout of the previous LED bead 100 is electrically connected to the power input port Vin of the next LED bead 100 to form a serial power supply line LED bead 100.

[0075] In this embodiment, the LED bead 100 can receive not only data signals but also power signals. The power signal can be provided by the controller, which can communicate with... Figure 3aThe power supply terminal VCC and the ground terminal GND shown are electrically connected to provide power signals to the LED strings in the LED light panel. Optionally, the controller can be directly connected to the power supply terminal and the ground terminal, or it can be connected to them via a connector or other intermediate circuitry; this is not limited. Each LED bead 100 is provided with a power input port Vin and a power output port Vout. These ports are electrically connected to the power input pin V1 and the power output pin V2 of the LED driver chip inside the LED bead 100. This connection method ensures that the LED driver chip can receive power signals from the power input port Vin and transmit them to the LED light-emitting unit to drive the LED light-emitting unit for display.

[0076] In the same LED string, adjacent LED beads 100 are electrically connected through their power input port Vin and power output port Vout. That is, the power output port Vout of the previous LED bead 100 is electrically connected to the power input port Vin of its next adjacent LED bead 100, forming a serial power supply line. This serial connection method ensures that the power signal can be transmitted sequentially along the LED string.

[0077] Furthermore, the power input port Vin of the first LED bead 100 in each of the multiple LED strings in the LED light board 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 bead 100 in each of the multiple LED strings is connected in parallel to the ground terminal, ensuring that the ends of all LED strings are correctly grounded. By connecting in parallel to the power supply terminal and the ground terminal, each LED string can obtain a stable power supply, while the serial power supply line ensures the continuity of the power signal throughout the entire LED string.

[0078] Further optionally, in this embodiment, the arrangement of the LED light panel is not limited and can be a row and column arrangement. For example, in a row and column arrangement, the LED light strings are organized into multiple rows and columns, with one LED light string as a row and LED beads 100 at the same position in different LED light strings as a column. The first LED bead 100 in each row receives data signals and power signals, and then these signals are transmitted to subsequent LED light strings through a serial connection.

[0079] For example, such as Figure 3a As shown, in the row and column arrangement, LED light strings are organized into multiple columns and multiple rows. Each LED light string is a column, and the LED beads 100 at the corresponding positions in each LED light string form a row of LED beads 100. The first LED bead 100 in each column receives data signals and power signals, and then these signals are transmitted to the subsequent LED light strings through serial connection.

[0080] It is explained that, no matter which arrangement is used, each LED lamp bead 100 can obtain the required data signal and power signal through the serial power supply line. The specific arrangement is selected according to the specific application requirement and design preference.

[0081] Further, in the embodiment of the present application, the serial power supply lines between adjacent LED lamp strings in the LED lamp panel are connected in parallel to form parallel power supply lines.

[0082] The LED lamp beads 100 in the plurality of LED lamp strings in the LED lamp panel are arranged in a row-column manner. The LED lamp beads 100 in the same LED lamp string are located in the same column, the LED lamp beads 100 in different LED lamp strings are located in the same row, and the serial power supply lines between adjacent two rows of LED lamp beads 100 are connected in parallel to form parallel power supply lines. Alternatively, the LED lamp beads 100 in the plurality of LED lamp strings are arranged in a row-column manner. The LED lamp beads 100 in the same LED lamp string are located in the same row, the LED lamp beads 100 in different LED lamp strings are located in the same column, and the serial power supply lines between adjacent two columns of LED lamp beads 100 are connected in parallel to form parallel power supply lines.

[0083] In the embodiment of the present application, the way of connecting the serial power supply lines in parallel is not limited. For example, the serial power supply lines can be connected together by wires to form parallel power supply lines.

[0084] In the embodiment of the present application, the way of connecting the serial power supply lines in parallel is not limited. For example, the serial power supply lines can be connected together by wires to form parallel power supply lines. Figure 3b A structure diagram of a serial-parallel power supply LED lamp panel provided by an exemplary embodiment of the present application is shown in FIG. 1. Figure 3b In FIG. 1, each LED lamp string in the LED lamp panel is connected to the serial power supply line of the LED lamp string in FIG. 2. Figure 3a The internal structure of each LED lamp string in the LED lamp panel is the same as that of the LED lamp string in FIG. 2. Figure 3b The VCC and GND in FIG. 1 have the same meaning as those in FIG. 2, which will not be described again. Figure 3a The VCC and GND in FIG. 1 have the same meaning as those in FIG. 2, which will not be described again. Figure 3bAs shown, each LED lamp string in the LED lamp panel includes a plurality of LED lamp beads 100, which are located in the same column, and the LED lamp beads 100 in the same position in different LED lamp strings (i.e. different columns) are located in the same row, each row including lamp beads from different LED lamp strings, and the serial power supply lines between adjacent two rows of LED lamp beads 100 are connected in parallel to form parallel power supply lines. Alternatively, the serial power supply lines between adjacent two rows of LED lamp beads 100 can be directly connected by wires, or other connection methods can be used, which are not limited. This connection method ensures that each row of LED lamp beads 100 can obtain stable power supply, and at the same time allows the power supply signal to be transmitted in parallel between different columns, for example, the LED lamp beads 100 in a column in the previous row can supply power in parallel to the LED lamp beads 100 in each column in the next row, and the LED lamp beads 100 in the same column in the previous row can supply power in series to the LED lamp beads 100 in the next row, realizing a hybrid power supply mode of series and parallel connection, and the parallel power supply mode is used to solve the problem that a failure of a certain LED lamp bead 100 on the serial power supply line causes the subsequent LED lamp beads 100 to be unable to obtain the power supply signal. Alternatively, each LED lamp string in the LED lamp panel includes a plurality of LED lamp beads 100 located in the same row, each row representing an LED lamp string, and the LED lamp beads 100 in the same position in different LED lamp strings (i.e. different rows) are located in the same column, each column including LED lamp beads from different LED lamp strings, and the serial power supply lines between adjacent two columns of LED lamp beads 100 are connected in parallel to form parallel power supply lines. This connection method ensures that each column of LED lamp beads 100 can obtain stable power supply, and at the same time allows the power supply signal to be transmitted in parallel between different rows, realizes a hybrid power supply mode of series and parallel connection, and the parallel power supply mode is used to solve the problem that a failure of a certain LED lamp bead 100 on the serial power supply line causes the subsequent LED lamp beads 100 to be unable to obtain the power supply signal.

[0085] Further, in the hybrid power supply mode of series and parallel connection, considering that each LED lamp bead 100 simultaneously receives 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 application, each LED lamp bead 100 in the LED lamp panel further includes a power gating circuit arranged between the power input port Vin and the power input pin V1, which is used to select the power supply signal finally used from the serial power supply line and the parallel power supply line.

[0086] Specifically, the power gating circuit can detect whether a power signal is received on the serial power supply line and the parallel power supply line, and in the case of detecting that the power signal exists on both the serial power supply line and the parallel power supply line, the serial power supply line is connected to the power input pin V1, and the serial power supply mode is preferentially used, that is, the serial power supply line is preferentially used as the main power supply path to give full play to the advantages of the serial power supply mode; or in the case of detecting that the power signal exists on one of the serial power supply line and the parallel power supply line and does not exist on the other, the power supply line on which the power signal exists is connected to the power input pin V1, and the power supply problem of the LED lamp bead 100 is preferentially solved.

[0087] Further, in the case that the serial power supply line has no power signal due to the failure of the previous LED lamp bead 100, the parallel power supply line serving as a backup route can be gated, and the subsequent LED lamp bead 100 is supplied with power in time, so that the subsequent LED lamp bead 100 can work normally. This circuit design ensures that the power supply of the LED lamp bead 100 has high reliability and flexibility, the serial power supply line as the main power supply path can reduce energy consumption, ensure the consistency of the brightness of the LED lamp bead 100, and simplify the circuit complexity of the driving chip; and the parallel power supply line as the backup power supply path ensures that even when the main path fails, the subsequent LED lamp bead 100 can still obtain a power signal and the LED lamp bead 100 works normally.

[0088] In the embodiments of the present application, the power gating circuit contained in each LED lamp bead 100 in the LED lamp panel can be realized by a relay or an electronic switch, but is not limited thereto.

[0089] Further, the embodiments of the present application also provide a LED lamp panel comprising the LED lamp bead 100. Figure 3a or Figure 3bThe LED display screen of the illustrated LED lamp panel. The LED display screen provided by the embodiment of the application comprises a controller and at least two LED lamp panels; the at least two LED lamp panels are spliced together in sequence to form the LED display screen; and the controller is arranged at the top and / or bottom of the LED display screen. That is, the controller can be arranged at the top of the LED display screen, the controller can be arranged at the bottom of the LED display screen, or the controller can be arranged at the top and the bottom of the LED display screen. The controller is responsible for driving a certain length of LED lamp string, and the specific length is not limited, for example, the controller can drive a 5-meter, 6-meter or 8-meter long lamp string. The numbers herein are only examples, and the length of the LED lamp string that can be driven by each controller can also be longer or shorter. If one controller is used, it can be located at the top or the bottom of the LED display screen; when more LED lamp panels need to be driven, two controllers can be used, and the two controllers are arranged at the top and the bottom of the display screen, respectively. This configuration method makes the middle of the entire LED display screen free of obstructions caused by the controller, thereby meeting the transparency requirement of the display screen, and the LED display screen can be implemented as a transparent screen. When the controller is located at the top of the display screen or there are two controllers (one at the top of the LED display screen and one at the bottom), the entire display screen can be designed as a hanging screen. This method is suitable for places with high ceilings, such as exhibition halls, theaters or large conference rooms, providing flexible installation options. If only the controller is arranged at the bottom of the display screen, there is usually a base to support the entire display screen, making it a kind of form standing on the ground. This method is suitable for scenes that do not need to be hung, such as shop windows or small display spaces. Alternatively, the controller and the LED lamp panel can be directly electrically connected, or the connection can be realized through a dedicated connector. These connectors not only ensure the reliability of the electrical connection, but also facilitate installation and maintenance.

[0090] The embodiment of the application does not limit the number of LED lamp panels included in the LED display screen. For example, it can be 2, 3, 4, 5 or 10, 30, etc. The specific number can be determined according to the application scenario and the size of the display space. For example, in Figure 4a , three LED lamp panels A, B and C are shown schematically; in Figure 4b , three LED lamp panels D, E and F are shown schematically; in Figure 4c , three LED lamp panels G, H and I are shown schematically; and in Figure 4dThree LED lamp panels J, K and L are shown in the figure. In addition, the LED lamp panels included in the LED display screen can be the same LED lamp panel or different LED lamp panels. The same refers to the same structure, type, size and power supply mode of the LED lamp panel. Correspondingly, different LED lamp panels refer to at least one of the structure, type, size and power supply mode of the LED lamp panel. This flexibility allows the LED display screen to use the same or different LED lamp panels to meet different display requirements or application scenarios. Optionally, in Figures 4a-4d the same LED lamp panel is used in the LED display screen shown in the figure. Figures 4a-4d The difference between the LED display screens shown in the figures lies in the number and setting position of the controller, the signal flow direction of part of the LED lamp panels and the power supply mode adopted. For details, please refer to the description in the subsequent embodiments.

[0091] In the LED display screen, the signal flow directions of at least two LED lamp panels are the same, or the signal flow directions of at least part of the adjacent LED lamp panels in at least two LED lamp panels are opposite. For example, the signal flow direction of the last LED lamp panel in at least two LED lamp panels is opposite to the signal flow direction of the other LED lamp panels. The signal flow direction herein includes the flow direction of the data signal and the power signal. For an LED lamp panel, the signal flow direction can be from top to bottom, or from bottom to top, or from left to right, or from right to left.

[0092] In the embodiments of the present application, the power supply mode of each LED lamp panel constituting the LED display screen is not limited. The power supply mode of each LED lamp panel constituting the LED display screen can be all serial power supply; can be all serial-parallel power supply; or part of the LED lamp panels can be serial power supply and part of the LED lamp panels can be serial-parallel power supply.

[0093] Figure 4a An LED display screen structure schematic diagram is provided for the exemplary embodiments of the present application. As shown in Figure 4a the figure, the LED display screen has three LED lamp panels A-C, wherein in Figure 4a each LED lamp string in each LED lamp panel has the same internal structure as the LED lamp string in Figure 3a , and Figure 4a VCC and GND in Figure 3a have the same meaning as VCC and GND, which will not be described here. The power supply mode of these LED lamp panels is serial power supply, and the three LED lamp panels are spliced together to constitute a complete LED display screen. In Figure 4a the LED display screen shown in the figure, the controller is arranged at the top of the LED display screen, and the signal flow directions of the three LED lamp panels A-C are the same, i.e., all from top to bottom, thereby ensuring that the signal transmission direction of the entire LED display screen is uniform.

[0094] Figure 4b Another LED display screen structure diagram is provided for the exemplary embodiments of the present application. As shown in Figure 4b , the LED display screen is composed of three LED lamp panels D-F, wherein each LED lamp string in each LED lamp panel is of the same internal structure as the LED lamp string in Figure 3a , and Figure 4b , and Figure 3a VCC and GND in the above have the same meaning, which will not be repeated here. The power supply mode of these LED lamp panels is serial-parallel power supply, and the three LED lamp panels D-F are spliced together to form a complete LED display screen. In the LED display screen shown in Figure 4b , the controller is arranged at the top of the LED display screen, and the signal flow directions of the LED lamp panels D-F are the same, i.e., all from top to bottom, thereby ensuring that the signal transmission directions of the entire LED display screen are uniform.

[0095] Figure 4c Another LED display screen structure diagram is provided for the exemplary embodiments of the present application. As shown in Figure 4c , the LED display screen is composed of three LED lamp panels G-I, wherein each LED lamp string in each LED lamp panel is of the same internal structure as the LED lamp string in Figure 3a , and Figure 4c , and Figure 3a VCC and GND in the above have the same meaning, which will not be repeated here. The power supply mode of the LED lamp panels G and I is serial power supply, the power supply mode of the LED lamp panel H is serial-parallel power supply, and the three LED lamp panels D-F are spliced together to form a complete LED display screen. In the LED display screen shown in Figure 4c , the controller is arranged at the top of the LED display screen, and the signal flow directions of the LED lamp panels G-I are the same, i.e., all from top to bottom, thereby ensuring that the signal transmission directions of the entire LED display screen are uniform.

[0096] Figure 4d Another LED display screen structure diagram is provided for the exemplary embodiments of the present application. As shown in Figure 4d , the LED display screen is composed of three LED lamp panels J-L, wherein each LED lamp string in each LED lamp panel is of the same internal structure as the LED lamp string in Figure 3a , and Figure 4d , and Figure 3a VCC and GND in the above have the same meaning, which will not be repeated here. The power supply mode of these LED lamp panels is serial-parallel power supply, and the three LED lamp panels J-L are spliced together to form a complete LED display screen. In the LED display screen shown in Figure 4dThe LED display screen shown contains two controllers, and is arranged at the top and bottom of the LED display screen respectively. The signal flow directions of the LED lamp panels J and K are the same, that is, from top to bottom. The signal flow direction of the last LED lamp panel L is opposite, that is, from bottom to top. In this way, the shielding caused by the controller on the LED display screen can be avoided.

[0097] It should be noted that the "first", "second", and the like in this paper are used to distinguish different messages, devices, modules, etc., and do not represent the order of precedence, nor do they limit the "first" and "second" to be different types.

[0098] It should also be noted that the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of another identical element in the process, method, article or device including the element.

[0099] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. An LED light string, characterized in that, The serially connected plurality of LED lamp beads comprises: a plurality of LED lamp beads connected in series; each LED lamp bead is provided with a first signal input port and a first signal output port, a second signal input port and a second signal output port, and an LED driving chip and an LED light-emitting unit are encapsulated inside the LED lamp bead, wherein: the first signal input port, the second signal input port, the first signal output port and the second signal output port of each LED lamp bead are respectively electrically connected with the first signal input pin, the second signal input pin, the first signal output pin and the second signal output pin of the internal LED driving chip, so as to transmit a data signal to the LED light-emitting unit through any signal input pin of the LED driving chip; the first signal output port and the second output port of adjacent LED lamp beads are respectively electrically connected with the first signal input port and the second signal input port, so as to form a serial signal line; and the first signal input port and the second signal output port of each LED lamp bead are directly electrically connected without passing through the internal LED driving chip, so as to form a first breakpoint continuation line.

2. The LED light string of claim 1, wherein, the second signal output port of the first LED lamp bead and the second signal input port of the second LED lamp bead are electrically connected, so as to form a second breakpoint continuation line; wherein the first LED lamp bead is any LED lamp bead on the LED lamp string, and the second LED lamp bead is spaced apart from the first LED lamp bead by at least two LED lamp beads.

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

4. The LED light string of claim 2, wherein, The LED driving chip comprises a monitoring circuit electrically connected with the first signal input pin and the second signal input pin, an analysis circuit electrically connected with the monitoring circuit, and a driving circuit electrically connected with the analysis circuit; wherein the monitoring circuit outputs the data signal and the pin identification of the any signal input pin to the analysis circuit when the any signal input pin receives the data signal; the analysis circuit analyzes the data piece corresponding to the LED light-emitting unit from the data signal according to the analysis mode corresponding to the pin identification, and outputs the data piece to the driving circuit; the driving circuit controls the display of the LED light-emitting unit according to the data piece; wherein different signal pins correspond to different analysis modes.

5. The LED light string of any of claims 1-4, wherein, Each LED lamp bead is further provided with a power input port and a power output port; the power input port and the power output port of each LED lamp bead are respectively electrically connected with the power input pin and the power output pin of the internal LED driving chip, so as to provide a power signal for the LED light-emitting unit through the LED driving chip; the power output port and the power input port of adjacent LED lamp beads are electrically connected, so as to form a serial power supply line; the power input port of the first LED lamp bead of the LED lamp string is electrically connected with a power supply end, and the power output port of the tail LED lamp bead of the LED lamp string is electrically connected with a grounding end.

6. An LED light panel, characterized by The plurality of LED lamp strings of any one of claims 1-5. ​ 7. The LED lamp panel of claim 6, wherein, The serial power supply lines between two adjacent LED light strings are connected in parallel to form parallel power supply lines.

8. The LED lamp panel of claim 7, wherein, The LED lamp beads in the plurality of LED light strings are arranged in a matrix manner, the LED lamp beads in the same LED light string are located in the same column, the LED lamp beads at the same position in different LED light strings are located in the same row, and the serial power supply lines between two adjacent rows of LED lamp beads are connected in parallel to form parallel power supply lines. Alternatively, The LED lamp beads in the plurality of LED light strings are arranged in a matrix manner, the LED lamp beads in the same LED light string are located in the same row, the LED lamp beads at the same position in different LED light strings are located in the same column, and the serial power supply lines between two adjacent columns of LED lamp beads are connected in parallel to form parallel power supply lines.

9. The LED lamp panel of claim 7, wherein, Each LED lamp bead further comprises a power supply gating circuit arranged between the power input port of the LED lamp bead and the power input pin of the internal LED driving chip of the LED lamp bead; The power supply gating circuit is configured to: when detecting that power supply signals exist on both the serial power supply lines and the parallel power supply lines, connect the serial power supply lines to the power input pin; or when detecting that a power supply signal exists on one of the serial power supply lines and the parallel power supply lines and no power supply signal exists on the other, connect the power supply line with the power supply signal to the power input pin.

10. An LED display screen, characterized by The LED display screen comprises: a controller and at least two LED lamp panels as claimed in any one of claims 6-9; the at least two LED lamp panels are spliced together in sequence to form the LED display screen; and the controller is arranged at the top and / or bottom of the LED display screen. The signal flow directions of the at least two LED lamp panels are the same, or the signal flow directions of at least some adjacent LED lamp panels among the at least two LED lamp panels are opposite.

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