Three-wire multi-light string unit assembly and address writing method capable of online automatic burning and address writing

Abstract

The present invention discloses a three-wire multi-light string unit assembly capable of online automatic addressing and addressing, and an addressing method. The assembly comprises a master control module and at least two three-wire LED light string units, each of which includes a branch instruction distribution module and an LED light string body. The assembly also includes a bus, one end of which is connected to the master control module, to which the branch instruction distribution modules in each of the three-wire LED light string units are connected. The branch instruction distribution module includes an instruction distribution module, a logic processing module, a signal input terminal, a first signal output terminal, and a second signal output terminal. The present invention optimizes the branch instruction distribution module, enabling unified online automatic and continuous addressing of multiple LED units in conjunction with the bus, or transmission and control of combined lighting instructions for the entire light string.

Description

Technical Field

[0001] The present invention relates to the technical field of LED light strings, and in particular to a three-wire multi-light string unit assembly capable of online automatic address writing and an address writing method. Background Art

[0002] LED decorative light strings are mostly used in places such as festivals and celebrations, advertising decorations, etc. Existing LED decorative light strings have different product specifications according to different usage requirements. According to the different application requirements of LED decorative light strings, they can be divided into two-line LED light strings, three-line LED light strings, four-line LED light strings, five-line LED light strings, etc., and the existing three-line LED light strings and above multi-line LED light strings usually have corresponding address codes. Regardless of whether they use online address writing or pre-addressing, they can realize point control, that is, the controller can be used to realize the illumination of LED lamp beads in corresponding positions, so that the LED light strings can form a variety of lighting functions, such as constant light, flashing, and flowing water, so that individual LED lamp beads in the same light string can be locally illuminated, and the rest are not illuminated, forming different lighting modes. For example, announcement number CN112648549A discloses the field of LED technology, specifically brightening LED light strings, ice bar lights, curtain lights, marquees, point-controlled LED lights and net lights; in the brightening LED light strings, ice bar lights, curtain lights, marquees, point-controlled LED lights and net lights of the present invention, the sealing glue layer is provided with a focusing glue layer above the LED light-emitting patch, and the light emitted by the LED light-emitting patch is concentrated by the focusing glue layer to achieve increased brightness.

[0003] In addition, as disclosed in Publication No. CN106572557B, a method and system for controlling the flickering of an LED light string is described. The method includes multiple groups of LED light strings and at least one driver chip, wherein the multiple groups of LED light strings are connected to the driver chip. The method comprises the following steps: pre-storing multiple display modes; setting a display sequence for the driver chip; and sequentially causing each group of LED light strings to display according to its corresponding display mode in accordance with the display sequence. Thus, by combining each group of LED light strings with the display sequence and sequentially flashing according to the display mode, effects such as flowing flash, moving flash, or random flashing of the multiple groups of LED light strings are achieved. Furthermore, the method is simple and easy to implement, thereby resolving the problem with existing LED light string flickering control technologies that prevents multiple groups of LED light strings from achieving asynchronous patterns such as flowing flash or moving flash.

[0004] However, existing curtain lights and Christmas tree light strings usually include a single controller combined with a bus, on which multiple three-wire LED light string units are connected, which can realize multiple control modes. However, in order to realize multiple control modules, it is necessary to write addresses for each LED lamp bead, and each three-wire LED light string unit in the existing light string assembly requires a single writing address, which makes the overall writing address more troublesome. Summary of the Invention

[0005] In response to the above problems, the present invention aims to provide a three-wire multi-light string unit assembly and address writing method that can automatically burn and write addresses online, which can realize unified online continuous addressing of multiple LED units combined with a bus.

[0006] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0007] A three-wire multi-light string unit assembly that can be automatically burned and addressed online includes a master control module and at least two three-wire LED light string units, any one of the three-wire LED light string units includes a branch instruction distribution module and an LED light string body, the LED light string body includes a light string line group and a plurality of LED lamp beads arranged along the light string line group; it also includes a bus, one end of the bus is connected to the master control module, and the branch instruction distribution module in any three-wire LED light string unit is connected to the bus; the branch instruction distribution module includes an instruction distribution module, a logic processing module, a signal input end, a first signal output end and a second signal output end, the first signal output end is connected to the bus, the first signal output end is used to connect with the signal input end in the adjacent branch instruction distribution module, and the second signal output end is used to connect with the corresponding LED light string body; when the master control module sends an instruction, the instruction distribution module completes instruction reception and analysis and then inputs the instruction into the logic processing module, and the logic processing module realizes signal conduction or disconnection of the first signal end and the second signal output end according to the corresponding instruction.

[0008] When in the address writing mode, the master control module sends an address writing instruction, and the instruction distribution module in the first branch instruction distribution module arranged on the bus completes instruction reception and analysis, and the instruction distribution module sends the address writing instruction to the logic processing module. The logic processing module realizes that the second signal output end is in the on state and the first signal output end is in the off state. After the LED light string body connected to the first branch instruction distribution module completes the online address writing, the address writing instruction in the first branch instruction distribution module is turned off, and the logic processing module realizes the conduction of the first signal output end and transmits the address writing instruction to the subsequent adjacent branch instruction distribution module. ; The instruction distribution module in the subsequent adjacent branch instruction distribution module completes instruction reception and parsing, and the instruction distribution module sends the address writing instruction to the logic processing module. The logic processing module realizes that the second signal output end is in the on state and the first signal output end is in the off state. After the LED light string body connected to the branch instruction distribution module completes the online address writing, the address writing instruction in the branch instruction distribution module is turned off, and the logic processing module realizes the conduction of the first signal output end and transmits the address writing instruction to the next subsequent adjacent branch instruction distribution module, and so on, until the address writing of all three-line LED light string units is completed.

[0009] The branch instruction distribution module also includes a voltage stabilizing module, which is used to provide stable voltage supply to the instruction distribution module and the logic processing module.

[0010] The LED light string bodies in different three-line LED light string units have the same number of LED lamp beads or different numbers of LED lamp beads.

[0011] The LED light string body adopts an online addressable LED light string; the instruction distribution module adopts an MCU chip.

[0012] The bus includes a signal line, a GND line and a VCC line. The branch instruction distribution module also includes a VCC interface end, a VCC output end, a GND interface end and a GND output end. The VCC interface end, the signal input end and the GND interface end in the first branch instruction distribution module are respectively connected to the master control module through the VCC line, the signal line and the GND line. The VCC interface end and the VCC output end between any two adjacent branch instruction distribution modules are connected through the VCC line. The GND interface end and the GND output end between any two adjacent branch instruction distribution modules are connected through the GND line. The signal input end and the first signal output end between any two adjacent branch instruction distribution modules are connected through the signal line.

[0013] The logic processing module is provided with a first signal receiving end, a second signal receiving end and an instruction signal receiving end. The first signal receiving end and the second signal receiving end are connected to the signal input end. The instruction distribution module is connected to the logic processing module through the instruction signal receiving end. The logic processing module is connected to the first signal output end and the second signal output end respectively, and realizes control of the first signal output end and the second signal output end.

[0014] A method for writing an address for a three-wire multi-light string unit assembly capable of online automatic burning and addressing includes any one of the above-mentioned three-wire multi-light string unit assembly capable of online automatic burning and addressing, and the specific addressing steps are:

[0015] S1. Connect the master control module to the power supply and power on the light string assembly through the master control module.

[0016] S2. The light string assembly enters the address writing mode. The master control module outputs the address writing instruction, which is transmitted to the branch instruction distribution module in the first three-wire LED light string unit through the signal line. The instruction distribution module in the branch instruction distribution module parses the address writing instruction after receiving it and inputs the address writing instruction into the logic processing module. After the logic processing module judges the address writing instruction, it realizes that the second signal output terminal is in the conductive state, thereby realizing the connection of the address writing route. The master control module, signal line, signal input terminal, first signal receiving terminal, logic processing module, second signal output terminal, and corresponding LED light string body arranged in sequence in the address writing route are connected.

[0017] S3. After the address writing of the LED light string body in the first three-wire LED light string unit is completed, the logic processing module realizes that the first signal output end is in the on state, and transmits the address writing signal to the branch instruction distribution module in the subsequent adjacent three-wire LED light string unit through the first signal output end. The instruction distribution module in the branch instruction distribution module in the subsequent adjacent three-wire LED light string unit parses the address writing instruction after receiving it, and inputs the address writing instruction into the logic processing module. After the logic processing module judges the address writing instruction, it realizes that the second signal output end is in the on state, thereby realizing the connectivity of the address writing route; and so on, until the online burning and address writing of all three-wire LED light string units are automatically completed.

[0018] In combination with the above, the address writing instruction includes two signal groups, namely the current group control signal and the subsequent group control signal. When the branch instruction distribution module receives the address writing instruction, the branch instruction distribution module that receives the address writing instruction only turns on the current group control signal, and the subsequent group control signal is in the off state until the LED light string body corresponding to the branch instruction distribution module completes the address writing, the current group control signal is in the off state, and then the subsequent group control signal is turned on, and the address writing instruction is transmitted to the next branch instruction distribution module through the second signal output end. The branch instruction distribution module repeats the above steps, and so on, until the address writing is completed.

[0019] In combination with the above, when the master control module sends a light-on instruction, the two signal groups in the light-on instruction are the same, and the logic processing module synchronously realizes the connection between the first signal output end and the second signal output end.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the present invention optimizes the branch instruction distribution module, and can realize unified online automatic continuous address burning or total light string combined lighting instruction transmission control by combining multiple LED units with a bus.

[0021] The features of the present invention can be clearly understood by referring to the drawings and the following detailed description of preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the master control module of the present invention;

[0024] Figure 3 Schematic diagram of the internal control structure of the branch instruction distribution module of the present invention;

[0025] Among them, 100, master control module; 200, bus; 210, VCC line; 220, signal line; 230, GND line; 300, three-wire LED light string unit; 301, VCC interface end; 302, GND interface end; 303, VCC output end; 304, GND output end; 310, branch instruction distribution module; 311, instruction distribution module; 312, logic processing module; 313, first signal output end; 314, second signal output end; 315, voltage stabilization module; 316, signal input end; 320, LED light string body. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0027] Example 1

[0028] Combine Figure 1 and Figure 3 As shown, the present invention discloses a three-wire multi-light string unit assembly that can be automatically burned and addressed online. The light string assembly can be a curtain light, a Christmas tree light, etc., including a master control module 100 and at least two three-wire LED light string units 300. The three-wire LED light string units 300 are respectively independent single light strings. In the specific structure, any three-wire LED light string unit 300 includes a branch instruction distribution module 310 and an LED light string body 320. The LED light string body 320 adopts a three-wire LED light string that can be addressed online. The LED light string that can be addressed online can adopt a three-wire online addressable LED disclosed in announcement number CN221483403U; other addressable LED light strings in the prior art can also be adopted; the LED light string body 320 includes a light string wire group and a plurality of LED lamp beads arranged along the light string wire group. The LED light string bodies 320 in different three-wire LED light string units 300 have the same number of LED lamp beads or different numbers of LED lamp beads, which can be set accordingly according to the usage specifications of the specific light string assembly.

[0029] In combination with the above, it also includes a bus 200, one end of the bus 200 is connected to the master control module 100, and the branch instruction distribution module 310 in any three-line LED light string unit 300 is connected to the bus 200 to realize a multi-level continuous arrangement setting, and the branch instruction distribution module 310 is located at the head end of any three-line LED light string unit 300.

[0030] In combination with the above structure, the branch instruction distribution module 310 includes an instruction distribution module 311, a logic processing module 312, a signal input terminal 316, a first signal output terminal 313 and a second signal output terminal 314. The first signal output terminal 313 is connected to the bus 200. The first signal output terminal 313 is used to connect with the signal input terminal 316 in the adjacent branch instruction distribution module 310, and the second signal output terminal 314 is used to connect with the corresponding LED light string body 320; when the master control module 100 sends an instruction, the instruction distribution module 311 completes the instruction reception and analysis and then inputs it into the logic processing module 312. The logic processing module 312 realizes the signal conduction or disconnection of the first signal terminal and the second signal output terminal 314 according to the corresponding instruction.

[0031] The specific instruction processing method is as follows: when in the address writing mode, the master control module 100 sends the address writing instruction, and the instruction distribution module 311 in the first branch instruction distribution module 310 arranged on the bus 200 completes the instruction reception and parsing, and the instruction distribution module 311 sends the address writing instruction to the logic processing module 312. The logic processing module 312 realizes that the second signal output terminal 314 is in the on state until the LED light string body 320 connected to the first branch instruction distribution module 310 completes the online address writing, and then turns off the address writing instruction in the first branch instruction distribution module 310. The logic processing module 312 realizes the conduction of the first signal output terminal 313 and transmits the address writing instruction to the subsequent adjacent branch instruction distribution module. Module 310; the instruction distribution module 311 in the subsequent adjacent branch instruction distribution module 310 completes instruction reception and parsing, the instruction distribution module 311 sends the address writing instruction to the logic processing module 312, the logic processing module 312 realizes that the second signal output terminal 314 is in a conductive state, until the LED light string body 320 connected to the branch instruction distribution module 310 completes the online address writing, and then turns off the address writing instruction in the branch instruction distribution module 310, the logic processing module 312 realizes the conduction of the first signal output terminal 313, and transmits the address writing instruction to the next subsequent adjacent branch instruction distribution module 310, and so on, until the address writing of all three-line LED light string units 300 is completed.

[0032] For example, when the master control module 100 sends an instruction through the bus 200, the voltage usually rises to about 8.5V (wherein, under normal working conditions, the operating voltage is 5V). The branch instruction distribution module 310 also includes a voltage stabilizing module 315, wherein the voltage stabilizing module 315 adopts a power supply LDO voltage regulator. The voltage stabilizing module 315 is used to realize stable power supply to the instruction distribution module 311 and the logic processing module 312. The instruction distribution module 311 adopts an MCU chip. At this time, the voltage stabilizing module 315 intervenes to stabilize the voltage at 5V and supply power to the instruction distribution module 311 and the logic processing module 312. The bus 200 signal is transmitted to the logic processing module 312 through the instruction distribution module 311. The logic processing module 312 receives the corresponding instruction, thereby realizing control of whether the instruction signal of the first signal output terminal 313 and the second signal output terminal 314 is sent or not, thereby realizing the online automatic burning and address writing control of the multi-level three-wire LED light string unit 300 and the control of the transmission of various lighting signals.

[0033] In the specific structure, the bus 200 includes a signal line 220, a GND line 230 and a VCC line 210, which is a three-line design. The branch instruction distribution module 310 also includes a VCC interface terminal 301, a VCC output terminal 303, a GND interface terminal 302 and a GND output terminal 304. The VCC interface terminal 301, the signal input terminal 316 and the GND interface terminal 302 in the first branch instruction distribution module 310 are connected to the master control module 100 through the VCC line 210, the signal line 220 and the GND line 230 respectively. Any two adjacent branch instructions are connected to the master control module 100. The VCC interface terminal 301 and the VCC output terminal 303 between the instruction distribution modules 310 are connected through the VCC line 210, the GND interface terminal 302 and the GND output terminal 304 between any two adjacent branch instruction distribution modules 310 are connected through the GND line 230, and the signal input terminal 316 and the first signal output terminal 313 between any two adjacent branch instruction distribution modules 310 are connected through the signal line 220; the signal line 220 realizes signal transmission, and combined with the three-wire LED light string that can be addressed online, the address code can be burned and written.

[0034] In the specific structure, the logic processing module 312 is provided with a first signal receiving end, a second signal receiving end and an instruction signal receiving end. The first signal receiving end and the second signal receiving end are connected to the signal input end 316. The instruction allocation module 311 is connected to the logic processing module 312 through the instruction signal receiving end. The logic processing module 312 is connected to the first signal output end 313 and the second signal output end 314 respectively, and realizes control of the first signal output end 313 and the second signal output end 314.

[0035] The present invention optimizes the branch instruction distribution module 310, which can realize unified online automatic continuous address writing or total light string combined lighting instruction transmission control by combining multiple LED units with the bus 200.

[0036] Example 2

[0037] In conjunction with Example 1, the present invention discloses an address writing method for a three-wire multi-light string unit assembly that can automatically burn and write addresses online. The specific address writing steps are:

[0038] S1. The master control module 100 is connected to a power source, and the light string assembly is powered on through the master control module 100.

[0039] S2. The light string assembly enters the address writing mode. The master control module 100 outputs an address writing instruction, which is transmitted to the branch instruction distribution module 310 in the first three-wire LED light string unit 300 via the signal line 220. The instruction distribution module 311 in the branch instruction distribution module 310 parses the address writing instruction after receiving it and inputs the address writing instruction into the logic processing module 312. After the logic processing module 312 determines the address writing instruction, it turns on the second signal output terminal 314, thereby realizing the connection of the address writing route. The master control module 100, signal line 220, signal input terminal 316, first signal receiving terminal, logic processing module 312, second signal output terminal 314, and corresponding LED light string body 320 arranged in sequence in the address writing route are connected.

[0040] S3. After the address writing of the LED light string body in the first three-line LED light string unit 300 is completed, the logic processing module 312 realizes that the first signal output terminal 313 is in a conducting state, and transmits the address writing signal to the branch instruction distribution module 310 in the subsequent adjacent three-line LED light string unit 300 through the first signal output terminal 313. The instruction distribution module 311 in the branch instruction distribution module 310 in the subsequent adjacent three-line LED light string unit 300 parses the address writing instruction after receiving it, and inputs the address writing instruction into the logic processing module 312. After the logic processing module 312 judges the address writing instruction, it realizes that the second signal output terminal 314 is in a conducting state, thereby realizing the connectivity of the address writing route; and so on, until the address writing of all three-line LED light string units 300 is completed.

[0041] The address writing instruction includes two signal groups, namely the current group control signal and the subsequent group control signal. When the branch instruction distribution module 310 receives the address writing instruction, the branch instruction distribution module 310 that receives the address writing instruction only turns on the current group control signal, and the subsequent group control signal is in the off state until the LED light string body 320 corresponding to the branch instruction distribution module 310 completes the address writing, the current group control signal is in the off state, and then the subsequent group control signal is turned on, and the address writing instruction is transmitted to the next branch instruction distribution module 310 through the first signal output terminal 313. The branch instruction distribution module 310 repeats the above steps, and so on, until the address writing is completed.

[0042] When the master control module 100 sends a light-on instruction, the two signal groups in the light-on instruction are the same, and the logic processing module 312 synchronously connects the first signal output terminal 313 and the second signal output terminal 314 .

[0043] In combination with the above, the master control module 100 is any one of a USB controller, a transformer controller, a battery box, and a solar panel; in combination with the above, the master control module 100 can be any one of a USB controller, a transformer controller, a battery box, and a solar panel. The solar panel usually contains components of a solar panel and a controller, which is a commonly used LED control component in the prior art. The master control module 100 is usually a combination of a power plug and an encoder, and can also be independently divided into a power plug and an encoder. The encoder can be an existing address writing component. The power plug is used according to different specifications and models, and can be divided into transformer plugs, USB plugs and other related components. The battery box can be a battery box with an embedded battery, or a battery box formed in combination with a solar panel. In addition, it can also be used to realize power supply from the mains, power supply from a solar panel combined with a battery, or power supply from an internal cavity battery, etc. The encoder adopts an encoder circuit board commonly used in the prior art, which facilitates online repeated burning and writing of codes for the LED light string; the master control module 100 is usually also equipped with a control circuit board, and the control circuit board adopts a lighting signal input program commonly used in existing LED light strings.

[0044] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the invention. Any simple modification, equivalent change or modification made to the above embodiment based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A three-wire multi-light string unit assembly capable of online automatic programming and addressing, comprising a master control module and at least two three-wire LED light string units, characterized in that: Any three-wire LED light string unit includes a shunt instruction distribution module and an LED light string body, wherein the LED light string body includes a light string line group and a plurality of LED lamp beads arranged along the light string line group; further comprising a bus, one end of the bus is connected to the master control module, and the shunt instruction distribution module in any three-wire LED light string unit is connected to the bus; the shunt instruction distribution module includes an instruction distribution module, a logic processing module, a signal input end, a first signal output end, and a second signal output end, wherein the first signal output end is connected to the bus, and the first signal output end is used to connect to the signal input end of the adjacent shunt instruction distribution module, The second signal output terminal is used to communicate with the corresponding LED light string body; when the master control module sends an instruction, the instruction distribution module completes instruction reception and analysis and then inputs it into the logic processing module, and the logic processing module realizes the signal conduction or disconnection of the first signal terminal and the second signal output terminal according to the corresponding instruction; when in the address writing mode, the master control module sends an address writing instruction, and the instruction distribution module in the first branch instruction distribution module arranged on the bus completes instruction reception and analysis, and the instruction distribution module sends the address writing instruction to the logic processing module, and the logic processing module realizes that the second signal output terminal is in the conducting state and the first signal output terminal is in the closed state. After the LED light string body connected to the first branch instruction distribution module completes online address writing, the address writing instruction in the first branch instruction distribution module is closed, the logic processing module realizes the conduction of the first signal output end, and transmits the address writing instruction to the subsequent adjacent branch instruction distribution module; the instruction distribution module in the subsequent adjacent branch instruction distribution module completes instruction reception and analysis, the instruction distribution module sends the address writing instruction to the logic processing module, the logic processing module realizes that the second signal output end is in the conducting state and the first signal output end is in the closed state, until the LED light string body connected to the branch instruction distribution module completes online address writing, and the branch instruction is closed. The logic processing module receives the address writing instruction in the command distribution module, realizes the conduction of the first signal output end, and transmits the address writing instruction to the next subsequent adjacent branch instruction distribution module, and so on, until the address writing of all three-line LED light string units is completed; the logic processing module is provided with a first signal receiving end, a second signal receiving end and a command signal receiving end, the first signal receiving end and the second signal receiving end are connected to the signal input end, the command distribution module is connected to the logic processing module through the command signal receiving end, and the logic processing module is connected to the first signal output end and the second signal output end respectively, and realizes control of the first signal output end and the second signal output end;The branch command distribution module also includes a voltage stabilization module, which is used to provide stable power supply to the command distribution module and the logic processing module. When the master control module sends a command via the bus, the voltage rises above the normal operating voltage. The voltage stabilization module maintains the voltage at the normal operating voltage and provides power to the command distribution module and the logic processing module. The bus signal is transmitted to the logic processing module through the command distribution module. The logic processing module receives the corresponding command and controls whether the command signal is transmitted to the first signal output terminal and the second signal output terminal, thereby achieving online automatic address writing and control of the multi-stage three-wire LED light string unit and the transmission of various lighting signals. When the master control module sends a lighting command, and the two signal groups in the lighting command are the same, the logic processing module synchronizes the first signal output terminal and the second signal output terminal.

2. The three-wire multi-light string unit assembly capable of online automatic address writing according to claim 1 is characterized in that: The LED light string bodies in different three-line LED light string units have the same number of LED lamp beads or different numbers of LED lamp beads.

3. The three-wire multi-light string unit assembly capable of online automatic address writing according to claim 2 is characterized in that: The LED light string body adopts an online addressable LED light string; the instruction distribution module adopts an MCU chip.

4. The three-wire multi-light string unit assembly capable of online automatic address writing according to any one of claims 1 to 3, characterized in that: The bus includes a signal line, a GND line and a VCC line. The branch instruction distribution module also includes a VCC interface end, a VCC output end, a GND interface end and a GND output end. The VCC interface end, the signal input end and the GND interface end in the first branch instruction distribution module are respectively connected to the master control module through the VCC line, the signal line and the GND line. The VCC interface end and the VCC output end between any two adjacent branch instruction distribution modules are connected through the VCC line. The GND interface end and the GND output end between any two adjacent branch instruction distribution modules are connected through the GND line. The signal input end and the first signal output end between any two adjacent branch instruction distribution modules are connected through the signal line.

5. The address writing method of a three-wire multi-light string unit assembly capable of online automatic burning and address writing is characterized by: The three-wire multi-light string unit assembly comprising the one of claims 1 to 4 capable of online automatic address writing is as follows: S1. Connect the master control module to the power supply and power on the light string assembly through the master control module. S2. The light string assembly enters the address writing mode. The master control module outputs the address writing instruction, which is transmitted to the branch instruction distribution module in the first three-wire LED light string unit through the signal line. The instruction distribution module in the branch instruction distribution module parses the address writing instruction after receiving it and inputs the address writing instruction into the logic processing module. After the logic processing module judges the address writing instruction, it realizes that the second signal output terminal is in the conductive state, thereby realizing the connection of the address writing route. The master control module, signal line, signal input terminal, first signal receiving terminal, logic processing module, second signal output terminal, and corresponding LED light string body arranged in sequence in the address writing route are connected. S3. After the address writing of the LED light string body in the first three-wire LED light string unit is completed, the logic processing module realizes that the first signal output end is in the on state, and transmits the address writing signal to the branch instruction distribution module in the subsequent adjacent three-wire LED light string unit through the first signal output end. The instruction distribution module in the branch instruction distribution module in the subsequent adjacent three-wire LED light string unit parses the address writing instruction after receiving it, and inputs the address writing instruction into the logic processing module. After the logic processing module judges the address writing instruction, it realizes that the second signal output end is in the on state, thereby realizing the connectivity of the address writing route; and so on, until the online burning and address writing of all three-wire LED light string units are automatically completed.

6. The address writing method for a three-wire multi-light string unit assembly capable of online automatic address writing according to claim 5, characterized in that: The address writing instruction includes two signal groups, namely the current group control signal and the subsequent group control signal. When the branch instruction distribution module receives the address writing instruction, the branch instruction distribution module that receives the address writing instruction only turns on the current group control signal, and the subsequent group control signal is in the off state until the LED light string body corresponding to the branch instruction distribution module completes the address writing. The current group control signal is turned off, and then the subsequent group control signal is turned on, and the address writing instruction is transmitted to the next branch instruction distribution module through the second signal output end. The branch instruction distribution module repeats the above steps, and so on, until the address writing is completed.

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