Multi-lamp-holder single-wire signal processing device and method

Abstract

The invention relates to the technical field of illumination control, in particular to a multi-lamp-holder single-wire signal processing device and method, which effectively counteracts energy loss of serial data signals in the process of transmitting the serial data signals through a preceding-stage LED light-emitting module on a single signal line through a power amplification function of a relay module, and improves the transmission efficiency of the serial data signals. The amplitude of the signal received by the post-stage LED light-emitting module is ensured to be maintained within the preset threshold range, and the problem of color data analysis failure caused by insufficient signal strength is solved. An edge shaping unit of the relay module adopts a Schmitt trigger or an equivalent circuit structure, and the edge jitter amplitude in the signal transmission process is reduced, so that a post-stage LED light-emitting module can accurately identify the high-level duration of a serial data signal, the color data analysis accuracy is improved, and color display deviation, flicker or error caused by jitter is avoided.

Description

Technical Field

[0001] This application relates to the field of lighting control technology, and in particular to a multi-lamp head single-wire signal processing device and method. Background Technology

[0002] With the rapid development of the smart lighting and landscape display industry, the demand for single-line control technology for large-scale light-emitting module chains is becoming increasingly urgent in scenarios such as outdoor landscape displays, building outline decorative lights, and automotive ambient lights.

[0003] In a multi-lamp head signal processing device that uses a single signal line to connect N intelligent LED light-emitting modules in series, the serial data signal is prone to signal attenuation, edge jitter and delay accumulation after being parsed and transmitted by the front-end LED light-emitting module. This causes the subsequent LED light-emitting module to be unable to accurately identify the duration of the high level in order to parse its own color data.

[0004] Therefore, finding a suitable single-wire signal processing method for multiple lamp heads is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] Based on this, in order to solve the problems of signal attenuation, edge jitter and parsing errors when a single signal line is connected in series with a smart LED light-emitting module as mentioned in the prior art, this application provides a multi-lamp head single-line signal processing device and method to ensure that all smart LED light-emitting modules in the entire chain can stably receive and parse their own color data, eliminate abnormal phenomena such as the LED light-emitting module going out and color distortion, achieve a high degree of consistency in the display effect of the entire chain of LED light-emitting modules, and improve the stability of device operation and user experience.

[0006] The first solution provided in this application is a multi-lamp head single-wire signal processing device, comprising: The main control module is used to send serial data signals through the PWM output interface; A cascaded light-emitting module chain consists of N intelligent LED light-emitting modules connected in series via a single signal line. Each intelligent LED light-emitting module acquires serial data signals through the signal line, parses its own color data by recognizing the high-level duration of the serial data signals, and drives light emission based on the color data. Unparsed serial data signals are transmitted to the next stage LED light-emitting module. A relay module is set up between consecutive units of intelligent LED light-emitting modules. The relay module amplifies the serial data signal and shapes its edges before continuing to transmit it to the next LED light-emitting module.

[0007] The multi-lamp head single-wire signal processing device provided in this application has the following advantages: By leveraging the power amplification function of the relay module, it effectively offsets the energy loss of the serial data signal during transmission through the front-end LED light-emitting module on a single signal line, ensuring that the signal amplitude received by the subsequent LED light-emitting module remains within a preset threshold range, thus solving the problem of color data parsing failure due to insufficient signal strength. The edge shaping unit of the relay module adopts a Schmitt trigger or equivalent circuit structure, reducing the edge jitter amplitude during signal transmission. This allows the subsequent LED light-emitting module to accurately identify the high-level duration of the serial data signal, improving the accuracy of color data parsing and avoiding color display deviations, flickering, or errors caused by jitter. Through the periodic deployment of the relay module, the number of intelligent LED light-emitting modules that can be connected in series on a single signal line can be easily expanded while controlling hardware costs, greatly broadening the application scenarios of the device, such as large-scale commercial lighting, outdoor landscape displays, and long-distance decorative light strips. By combining the high-level duration resolution mechanism of the intelligent LED light-emitting module with the signal processing function of the relay module, it is ensured that all intelligent LED light-emitting modules in the entire chain can stably receive and resolve their own color data, eliminating abnormal phenomena such as the LED light-emitting modules going out and color distortion in the downstream LED light-emitting modules. This achieves a high degree of consistency in the display effect of the entire chain of LED light-emitting modules, improving the operational stability of the device and the user experience. This embodiment solves the problems of signal attenuation, edge jitter, and resolution errors when a single signal line is used to connect intelligent LED light-emitting modules in series.

[0008] Furthermore, it also includes: an end-matching resistor, which is connected in parallel between the DOUT pin of the last smart LED light-emitting module and the ground line GND, to attenuate the serial data signal.

[0009] Furthermore, the serial data signal is a return-to-zero code signal, and the high-level duration of the return-to-zero code signal is 400ns-800ns. When the high-level duration is ≤400ns, the corresponding logic is "0", and when 400ns < high-level duration ≤800ns, the corresponding logic is "1". The data frame of the serial data signal is 24 bits, which includes 8 bits of data in the red channel, 8 bits of data in the green channel, and 8 bits of data in the blue channel.

[0010] Furthermore, the number N of the cascaded light-emitting module chain is a positive integer ≥2, adjacent intelligent LED light-emitting modules are connected through a single signal line, and the power supply terminals of all intelligent LED light-emitting modules are connected in parallel to the same power bus.

[0011] Furthermore, the intelligent LED light-emitting module includes a DIN pin, a DOUT pin, a decoding module, and a driving module. The DIN pin receives the serial data signal output by the preceding intelligent LED light-emitting module. The DOUT pin transmits the serial data signal that has not been decoded by itself to the subsequent LED light-emitting module. The decoding module parses the color data of the current LED light-emitting module by recognizing the high-level duration of the serial data signal. The driving module controls the RGB chip to emit light according to the decoded color data to achieve independent adjustment of brightness and color.

[0012] Furthermore, the decoding module of each intelligent LED light-emitting module includes a pre-stored 1-bit cascaded address identifier, and each data frame in the serial data signal is preceded by a start marker predefined by the protocol; The default cascade address identifier of each smart LED light-emitting module is "0". If the start mark of the data frame of the serial data signal is detected, its own identifier is flipped to "1" and the start mark of the data frame is forwarded to the subsequent smart LED light-emitting module. When the cascade address flag bit of the decoding module is "1", the decoding module starts to store the parsed logic code until 24 bits of color data are accumulated, and then latches the complete color data frame to the driver module. After latching the complete color data frame, the cascade address flag bit of the decoding module flips back to "0", the decoding module switches back to forwarding mode, and stops storing data.

[0013] Furthermore, the serial data signal is used to display the image of the pre-arranged light-emitting module chain through a method of single-frame static control and multi-frame dynamic switching.

[0014] Furthermore, the steps of the method for single-frame static control and multi-frame dynamic switching include: The single-frame static control steps include: the serial data signal includes at least one frame of serial data sequence, each frame of serial data sequence carries the color data of all intelligent LED light-emitting modules in the light-emitting module chain, and each frame of serial data sequence controls the light-emitting module chain to present a frame of static image; The multi-frame dynamic switching steps include: continuously sending M frames of serial data sequence, and using the color data differences of each LED light-emitting module between frames to enable the light-emitting module chain to achieve overall dynamic display; The transmission frame rate of the serial data sequence is no less than 24Hz to eliminate visual flicker.

[0015] Furthermore, the decoding module of the intelligent LED light-emitting module is equipped with a synchronization latch unit, which eliminates the asynchrony in brightness between all intelligent LED light-emitting modules on each signal line caused by transmission time differences. After latching a 24-bit complete color data frame, the decoding module of each smart LED light-emitting module temporarily stores the 24-bit complete data frame in the cache unit and starts the timing unit. The timing unit presets a timing threshold according to the sequential position of the smart LED light-emitting module in the light-emitting module chain. When the timing threshold is reached, the color data of the cache unit is output to the driver module to realize the synchronous switching of the bright and dark states of the entire chain of LED light-emitting modules.

[0016] Furthermore, the serial data signal can be equipped with a grouping threshold adjustment command to change the timing threshold of a specified intelligent LED light-emitting module, thereby achieving differentiated synchronous display based on grouping: The grouping threshold adjustment instruction includes a predefined threshold adjustment flag, a target group identifier, and a new timing threshold; Each intelligent LED light-emitting module's decoding module pre-stores its own group identifier; When the intelligent LED light-emitting module detects the threshold adjustment mark, it compares the target group identifier with its own group identifier. If they match, the timing threshold of the timing unit is updated to the new timing threshold. By adjusting the timing thresholds of different groups of intelligent LED light-emitting modules, each group of intelligent LED light-emitting modules can synchronously lock color data at different time points to achieve: alternating display of odd and even groups, or partitioned gradient layered image display, or sequential lighting of flowing lights for extended display.

[0017] Furthermore, the main control unit generates the trigger interval of the start marker or the transmission priority of the color data frame in the serial data signal according to the preset graphic requirements. By utilizing the transmission delay difference of the serial data signals received by the intelligent LED light-emitting modules in different sequences in the light-emitting module chain, the LED light-emitting modules at different positions trigger the latching and driving of color data at different time points, so as to achieve: a flowing light extension display from one end of the light-emitting module chain to the other end, or a gradual brightening and dimming animation display based on position gradient, or a directional chasing and scanning graphic display.

[0018] Furthermore, the relay module includes: a signal receiving unit, a gain amplification unit, a Schmitt trigger, a signal forwarding unit, and an integrated power management unit, and the relay module is connected in series between any two intelligent LED light-emitting modules in the light-emitting module chain or between the starting end of the light-emitting module chain and the main control end. The signal receiving unit receives the serial data signal from the front-end intelligent LED light-emitting module through an impedance matching circuit. The gain amplification unit is based on a low-noise operational amplifier, and the gain coefficient is adjusted by a built-in resistor network to compensate for signal attenuation caused by long-distance transmission. Schmitt triggers perform edge steepening and jitter elimination on amplified signals, and repair logic level distortion caused by transmission. The signal forwarding unit forwards the shaped signal to the subsequent LED light-emitting module through a push-pull output circuit; The power management module integrates a DC-DC converter to supply power to each unit of the relay module.

[0019] The second solution provided in this application is: a multi-lamp head single-wire signal processing method, used in applying the multi-lamp head single-wire signal processing device described in any one of the first solutions, the method comprising the following steps: The main control module sends a serial data signal to the cascaded light-emitting module chain through the PWM output interface. The serial data signal contains the color data of each smart LED light-emitting module in the cascaded light-emitting module chain, and the data is encoded in a serial manner. A cascaded light-emitting module, composed of N intelligent LED light-emitting modules connected in series via a single signal line, receives the serial data signal. Each intelligent LED light-emitting module performs the following operations in sequence: identifies the color data segment corresponding to itself in the serial data signal, and parses its own color data by detecting the high-level duration of the data segment; drives its own light-emitting unit to present the corresponding color based on the parsed color data; and transmits the remaining unparsed serial data signal to the subsequent LED light-emitting module without delay. In a cascaded light-emitting module chain, a relay module is set between each consecutive preset number of intelligent LED light-emitting modules. The relay module performs the following operations: receiving serial data signals transmitted by the preceding intelligent LED light-emitting module or the previous relay module; amplifying and shaping the power of the received serial data signals; and transmitting the processed serial data signals to the following LED light-emitting module or the next relay module.

[0020] The multi-lamp head single-wire signal processing method provided in this application has the following advantages: By leveraging the power amplification function of the relay module, the energy loss of the serial data signal during transmission through the front-end LED light-emitting module on a single signal line is effectively offset, ensuring that the signal amplitude received by the subsequent LED light-emitting module remains within a preset threshold range, thus solving the problem of color data parsing failure due to insufficient signal strength. The edge shaping unit of the relay module adopts a Schmitt trigger or equivalent circuit structure, reducing the edge jitter amplitude during signal transmission. This enables the subsequent LED light-emitting module to accurately identify the high-level duration of the serial data signal, improving the accuracy of color data parsing and avoiding color display deviations, flickering, or errors caused by jitter. Through the periodic deployment of the relay module, the number of intelligent LED light-emitting modules that can be connected in series on a single signal line can be easily expanded while controlling hardware costs, greatly broadening the application scenarios of the device, such as large-scale commercial lighting, outdoor landscape displays, and long-distance decorative light strips. By combining the high-level duration resolution mechanism of the intelligent LED light-emitting module with the signal processing function of the relay module, it is ensured that all intelligent LED light-emitting modules in the entire chain can stably receive and resolve their own color data, eliminating abnormal phenomena such as the LED light-emitting modules going out and color distortion in the downstream LED light-emitting modules. This achieves a high degree of consistency in the display effect of the entire chain of LED light-emitting modules, improving the operational stability of the device and the user experience. This embodiment solves the problems of signal attenuation, edge jitter, and resolution errors when a single signal line is used to connect intelligent LED light-emitting modules in series. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is one of the structural block diagrams of a multi-lamp head single-wire signal processing device in one embodiment; Figure 2 This is a second structural block diagram of a multi-lamp head single-wire signal processing device in one embodiment; Figure 3 This is a flowchart illustrating a single-wire signal processing method for multiple lamp heads in one embodiment. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Example 1 In a multi-lamp head signal processing device that uses a single signal line to connect N intelligent LED light-emitting modules in series, the serial data signal is prone to signal attenuation, edge jitter and delay accumulation after being parsed and transmitted by the front-end LED light-emitting module. This causes the subsequent LED light-emitting module to be unable to accurately identify the duration of the high level in order to parse its own color data.

[0025] See Figure 1 As shown, this embodiment provides a multi-lamp head single-wire signal processing device to solve the above problems, including: The main control module 100 is used to send serial data signals through a PWM output structure; Specifically, after the main control module starts, it configures the constant frequency of the PWM output structure to 1MHz. The main control module obtains the RGB color data of the N intelligent LED light-emitting modules to be displayed, encodes them into serial data signals according to the rules, and then assembles the encoded serial data signals. The cascaded light-emitting module chain 200 is composed of N intelligent LED light-emitting modules connected in series through a single signal line. Each intelligent LED light-emitting module obtains serial data signals through the signal line, parses its own color data by recognizing the high-level duration of the serial data signal, and drives the light emission according to the color data. The unparsed serial data signals are transmitted to the subsequent LED light-emitting modules. Specifically, the main control module sends a serial data signal to the first intelligent LED light-emitting module in the cascaded light-emitting module chain through a PWM output structure. The output level is high. The first intelligent LED light-emitting module receives the signal through the IN pin. After detecting the frame synchronization code, it locates its corresponding color data segment. The intelligent LED light-emitting module identifies the high-level duration of each logic bit in the color data segment through its built-in Schmitt trigger, and parses its own RGB color data. The intelligent LED light-emitting module converts the parsed RGB color data into a PWM duty cycle to drive the built-in RGB LED to emit light. The intelligent LED light-emitting module transmits the remaining unparsed signals to the next stage through a hardware pass-through circuit. The subsequent LED light-emitting modules repeat the steps from the first intelligent LED light-emitting module receiving the signal through the IN pin to the intelligent LED light-emitting module transmitting the remaining unparsed signals to the next stage through the hardware pass-through circuit, until all N LED light-emitting modules have completed data parsing and emission.

[0026] A relay module 300 is set between consecutive intelligent LED light-emitting modules. The relay module amplifies the serial data signal and shapes its edges before continuing to transmit it to the next LED light-emitting module.

[0027] Specifically, a relay module is set between every 10 consecutive intelligent LED light-emitting modules. The relay module receives the serial data signal transmitted from the previous stage through the input pin. The relay module detects the amplitude of the input signal through a voltage comparator. The relay module performs edge shaping on the amplified signal through a Schmitt trigger and then transmits the signal to the next stage through a push-pull circuit. After the signal transmission is completed, the relay module enters a standby state. After the intelligent LED light-emitting module detects the end of frame code, it resets the parsing buffer and maintains the current light-emitting state. The main control module sends the next frame of serial data signal after a preset time interval. The operation is repeated to achieve dynamic color refresh.

[0028] This embodiment provides a multi-lamp head single-wire signal processing device that effectively compensates for energy loss during the transmission of serial data signals through a single signal line via the front-end LED light-emitting module. This ensures that the signal amplitude received by the subsequent LED light-emitting module remains within a preset threshold range, resolving the problem of color data parsing failure due to insufficient signal strength. The relay module's edge shaping unit employs a Schmitt trigger or equivalent circuit structure, reducing edge jitter during signal transmission. This allows the subsequent LED light-emitting module to accurately identify the high-level duration of the serial data signal, improving color data parsing accuracy and avoiding color display deviations, flickering, or errors caused by jitter. Through the periodic deployment of the relay module, the number of intelligent LED light-emitting modules that can be connected in series on a single signal line can be easily expanded while controlling hardware costs, greatly broadening the device's application scenarios, such as large-scale commercial lighting, outdoor landscape displays, and long-distance decorative light strips. By combining the high-level duration resolution mechanism of the intelligent LED light-emitting module with the signal processing function of the relay module, it is ensured that all intelligent LED light-emitting modules in the entire chain can stably receive and resolve their own color data, eliminating abnormal phenomena such as the LED light-emitting modules going out and color distortion in the downstream LED light-emitting modules. This achieves a high degree of consistency in the display effect of the entire chain of LED light-emitting modules, improving the operational stability of the device and the user experience. This embodiment solves the problems of signal attenuation, edge jitter, and resolution errors when a single signal line is used to connect intelligent LED light-emitting modules in series.

[0029] Example 2 This embodiment provides a further technical solution based on Embodiment 1.

[0030] This embodiment provides a further technical solution. The multi-lamp head single-wire signal processing device of this embodiment further includes: an end matching resistor, which is connected in parallel between the DOUT pin of the last intelligent LED light-emitting module and the ground line to attenuate the serial data signal.

[0031] It should be noted that at the end of the cascaded light-emitting module chain of the multi-lamp single-wire signal processing device, a matching resistor is connected in parallel between the DOUT pin of the last intelligent LED light-emitting module and the ground wire to suppress signal reflection and improve signal integrity.

[0032] In this embodiment, a further technical solution is provided: the serial data signal is a return-to-zero code signal, and the high-level duration of the return-to-zero code signal is 400ns-800ns. When the high-level duration is ≤400ns, the corresponding logic is "0"; when the 400ns high-level duration is ≤800ns, the corresponding logic is "1". The data frame of the serial data signal is 24 bits, which includes 8 bits of data in the red channel, 8 bits of data in the green channel, and 8 bits of data in the blue channel.

[0033] It should be noted that this embodiment uses Return-to-Zero (RZ) code as the serial data signal encoding format, with a high-level duration ranging from 400ns to 800ns, and a data frame of 24 bits. RZ code directly represents the logic state through the high-level duration, without relying on clock synchronization. Setting the high-level duration threshold for logic 0 / 1 to 400ns perfectly matches the response time of the Schmitt trigger built into the intelligent LED light-emitting module. The LED light-emitting module can directly detect the high-level duration through hardware circuitry, eliminating the need for software calculation and reducing parsing latency. Without RZ code, the logic state depends on level transitions, and misjudgments are easily made when signal jitter is ≥200ns. In this embodiment, the logic 0 / 1 threshold interval for RZ code is 400ns, ensuring clear distinction of the logic state even if signal attenuation causes ±100ns jitter.

[0034] In this embodiment, a further technical solution is provided: the number N of the cascaded light-emitting module chain is a positive integer ≥2; adjacent intelligent LED light-emitting modules are connected through a single signal line; and the power supply terminals of all intelligent LED light-emitting modules are connected in parallel to the same power bus.

[0035] It should be noted that in this embodiment, the number N of intelligent LED light-emitting modules in the cascaded light-emitting module chain is a positive integer ≥2. Adjacent LED light-emitting modules are connected through a single signal line, and the power supply terminals of all LED light-emitting modules are connected in parallel to the same power bus. Adjacent LED light-emitting modules are transmitted in series through a single signal line, without the need for additional address or clock lines. The number N of LED light-emitting modules is only limited by the signal attenuation threshold and the power bus capacity, making wiring simple and expansion convenient.

[0036] In this embodiment, a further technical solution is provided: the intelligent LED light-emitting module includes a DIN pin, a DOUT pin, a decoding module, and a driving module. The DIN pin receives the serial data signal output by the preceding intelligent LED light-emitting module. The DOUT pin transmits the serial data signal that has not been decoded by itself to the subsequent LED light-emitting module. The decoding module parses the color data of the current LED light-emitting module by recognizing the high-level duration of the serial data signal. The driving module controls the RGB chip to emit light according to the decoded color data to achieve independent adjustment of brightness and color.

[0037] It should be noted that the intelligent LED light-emitting module integrates DIN pins, DOUT pins, a decoding module, and a driver module. The signal transmission from the DIN pin to the DOUT pin utilizes a hardware-level transparent transmission circuit, reducing signal transmission delay. The decoding module uses a Schmitt trigger and a timer to identify the duration of high-level signals for real-time display. The decoding module accelerates color data parsing, and its response speed meets dynamic refresh requirements. The driver module employs three independent PWM controllers, each with a PWM resolution of ≥12 bits, enabling 4096 independent levels of brightness adjustment for the RGB chip, improving color display accuracy. The decoding module and driver module synchronize via a hardware handshake signal, resulting in smoother color transitions.

[0038] This embodiment provides a further technical solution: the decoding module of each intelligent LED light-emitting module includes a pre-stored 1-bit cascaded address identifier bit, and each data frame in the serial data signal is preceded by a start marker predefined by the protocol; The default cascade address identifier of each smart LED light-emitting module is "0". If the start mark of the data frame of the serial data signal is detected, its own identifier is flipped to "1" and the start mark of the data frame is forwarded to the subsequent smart LED light-emitting module. When the cascade address flag bit of the decoding module is "1", the decoding module starts to store the parsed logic code until 24 bits of color data are accumulated, and then latches the complete color data frame to the driver module. After latching the complete color data frame, the cascade address flag bit of the decoding module flips back to "0", the decoding module switches back to forwarding mode, and stops storing data.

[0039] It should be noted that the cascade address identifier of all intelligent LED light-emitting modules is "0" by default, and they are in forwarding mode. When the LED light-emitting module detects the protocol predefined start mark in the serial data, the hardware circuit immediately flips its own identifier bit to "1" and simultaneously transmits the start mark to the subsequent intelligent LED light-emitting module. When the identifier bit is "1", the LED light-emitting module enters storage mode, accumulates and parses 24-bit color data through the decoding module, and latches the complete data frame to the driver module. After latching is completed, the identifier bit automatically flips back to "0", the LED light-emitting module switches back to forwarding mode, stops storing data, and waits for the next start mark trigger.

[0040] This solution uses flag bit toggling logic and a start marker detection mechanism to promptly latch data frames, preventing color display lag. Specifically, when the flag bit is "0", the LED module only forwards data, avoiding the accidental storage of residual data from the previous stage; when the flag bit is "1", it only stores its own data frame, filtering data forwarded by subsequent stages. The LED module does not require pre-programming a unique address; it achieves "self-positioning" through flag bit toggling. Adding or removing LED modules only requires physical cascading, without reprogramming. The flag bit toggling logic is hardware-triggered, with no software traversal delay. The cascading scale is only limited by the signal attenuation threshold, and both flag bit toggling and mode switching are hardware-triggered with no accumulated delay.

[0041] This embodiment provides a further technical solution: the serial data signal is used to realize the image display of the pre-arranged light-emitting module chain through a method of single-frame static control and multi-frame dynamic switching.

[0042] It should be noted that each frame of 24-bit × N serial data corresponds to the static color data of N LED light-emitting modules. The LED light-emitting modules parse their own data frames through cascaded address identifier bits. The main control module continuously sends multiple frames of static data at fixed time intervals. The light-emitting module chain displays different static images in sequence, forming a dynamic visual effect and dynamically refreshing.

[0043] This embodiment provides a further technical solution, wherein the steps of the method for single-frame static control and multi-frame dynamic switching include: The single-frame static control steps include: the serial data signal includes at least one frame of serial data sequence, each frame of serial data sequence carries the color data of all intelligent LED light-emitting modules in the light-emitting module chain, and each frame of serial data sequence controls the light-emitting module chain to present a frame of static image; The multi-frame dynamic switching steps include: continuously sending M frames of serial data sequence, and using the color data differences of each LED light-emitting module between frames to enable the light-emitting module chain to achieve overall dynamic display; The transmission frame rate of the serial data sequence is no less than 24Hz to eliminate visual flicker.

[0044] It should be noted that in the frame structure of single-frame static control, each frame of serial data sequence adopts the structure of "frame header + N×24-bit color data + frame tail". The frame header is a 16-bit protocol-predefined start marker that triggers the flipping of the cascaded address identifier bit of the LED light-emitting module. The color data area consists of N 24-bit RGB color data frames, which achieve self-location parsing through the cascaded address identifier bit. The frame tail is an 8-bit CRC check bit to ensure data integrity. In multi-frame dynamic switching, the main control module continuously sends M frames of serial data sequence at fixed time intervals, with each frame corresponding to a static image of the light-emitting module chain. A hardware timer is used to precisely control the frame transmission interval, and the timer interrupt triggers DMA to send data, ensuring that the frame rate is stable at greater than or equal to 24Hz, eliminating the critical frame rate for visual flicker. In this scheme, the LED light-emitting module latches each frame of data through hardware circuitry, reducing latching delay and minimizing flicker.

[0045] This embodiment provides a further technical solution: the decoding module of the intelligent LED light-emitting module is equipped with a synchronization latch unit, which eliminates the asynchrony in brightness caused by transmission time difference among all intelligent LED light-emitting modules on each signal line. After latching a 24-bit complete color data frame, the decoding module of each smart LED light-emitting module temporarily stores the 24-bit complete data frame in the cache unit and starts the timing unit. The timing unit presets a timing threshold according to the sequential position of the smart LED light-emitting module in the light-emitting module chain. When the timing threshold is reached, the color data of the cache unit is output to the driver module to realize the synchronous switching of the bright and dark states of the entire chain of LED light-emitting modules.

[0046] It should be noted that each intelligent LED light-emitting module's decoding module integrates a 24-bit hardware cache unit. After the decoding module parses and latches the complete 24-bit color data frame, it first temporarily stores the data in the cache unit and does not immediately output it to the driver module. The decoding module has a built-in timing unit, whose timing threshold is calculated based on the LED light-emitting module's sequential position in the chain using a preset formula: T = t0 + (n-1)×Δt, where t0 is the baseline delay, n is the LED light-emitting module's sequence number in the chain, and Δt is the single LED light-emitting module's transmission delay compensation value. After the timing unit is activated, when the timing value reaches the preset timing threshold, the hardware circuit immediately outputs the color data from the cache unit to the driver module synchronously, achieving synchronous switching of the brightness and darkness states of all LED light-emitting modules in the chain. In this solution, the timing threshold is dynamically adjusted according to the LED light-emitting module's position. Actual measurements show that the brightness and darkness switching delay of all LED light-emitting modules in the chain is reduced. The cache unit adopts a dual-port RAM structure to avoid brightness and darkness anomalies caused by data transmission interruptions. When all LED light-emitting modules in the chain switch synchronously, the visual consistency of the brightness and darkness states is improved.

[0047] This embodiment provides a further technical solution: the serial data signal can be equipped with a grouping threshold adjustment command to change the timing threshold of a specified intelligent LED light-emitting module, thereby achieving differentiated synchronous display of groups. The grouping threshold adjustment instruction includes a predefined threshold adjustment flag, a target group identifier, and a new timing threshold; Each intelligent LED light-emitting module's decoding module pre-stores its own group identifier; When the intelligent LED light-emitting module detects the threshold adjustment mark, it compares the target group identifier with its own group identifier. If they match, the timing threshold of the timing unit is updated to the new timing threshold. By adjusting the timing thresholds of different groups of intelligent LED light-emitting modules, each group of intelligent LED light-emitting modules can synchronously lock color data at different time points to achieve: alternating display of odd and even groups, or partitioned gradient layered image display, or sequential lighting of flowing lights for extended display.

[0048] It should be noted that the instruction adopts a structure of "threshold adjustment flag + target group identifier + new timing threshold + CRC check bit". Each intelligent LED light-emitting module's decoding module pre-stores an 8-bit group identifier. When the threshold adjustment flag is detected, the hardware circuit automatically compares the target group identifier with its own pre-stored identifier. If a match is successful, the timing threshold of the timing unit is immediately updated to the new timing threshold, overwriting the threshold calculated at the original position. If a match fails, the instruction is ignored, and the original timing threshold is maintained. By sending different new timing thresholds to different groups, the synchronous latching time nodes of each group of LED light-emitting modules are controlled. In the alternating display of odd and even groups, the threshold for odd groups is set to t1, and the threshold for even groups is set to t2, where t2 - t1 = With a time limit of 50μs, two groups of LED light-emitting modules can be synchronously brightened and dimmed at different time points. In the zoned gradient layered display, the threshold values ​​of groups 1 to N increase by Δt sequentially, such as 10μs, to achieve a gradual brightening and dimming effect from the beginning to the end. In the flowing light extended display, the threshold values ​​of groups 1 to N increase by Δt sequentially, such as 20μs, to achieve a flowing light effect with sequential lighting. In this solution, the hardware recognition latency of the threshold adjustment command is reduced, eliminating the need to modify the synchronization threshold of each LED light-emitting module individually through software. This enables the alternating synchronous brightening and dimming of two groups of LED light-emitting modules, provides visually smooth transitions between odd and even groups, ensures a smooth gradient transition in the zoned gradient layered display, and allows for adjustable flowing light speed in the flowing light extended display.

[0049] Example 3 Based on Embodiment 1 or Embodiment 2, this embodiment provides further technical solutions.

[0050] In this embodiment, a further technical solution is provided: the main control terminal generates the trigger interval of the start marker or the transmission priority of the color data frame in the serial data signal according to the preset graphic requirements. By utilizing the transmission delay difference of the serial data signals received by the intelligent LED light-emitting modules in different sequences in the light-emitting module chain, the LED light-emitting modules at different positions trigger the latching and driving of color data at different time points, so as to achieve: a flowing light extension display from one end of the light-emitting module chain to the other end, or a gradual brightening and dimming animation display based on position gradient, or a directional chasing and scanning graphic display.

[0051] It should be noted that the main control unit has a built-in mapping table between graphic requirements and control parameters. Based on preset graphic requirements, it dynamically generates two types of control parameters. The start marker trigger interval controls the transmission time difference of serial data frames, and the color data frame transmission priority is adjusted by a hardware queue to change the transmission order of color data from LED light-emitting modules at different positions, with higher-priority frames entering the transmission queue first. The main control unit executes the control parameters through a combination of DMA and timers. The trigger interval is precisely controlled by the timer, and the transmission priority is implemented by the hardware queue, ensuring the real-time execution of parameters.

[0052] See Figure 2 As shown, a further technical solution is provided in this embodiment. The relay module includes: a signal receiving unit, a gain amplification unit, a Schmitt trigger, a signal forwarding unit, and an integrated power management unit. The relay module is connected in series between any two intelligent LED light-emitting modules in the light-emitting module chain or between the starting end of the light-emitting module chain and the main control end. The signal receiving unit receives the serial data signal from the front-end intelligent LED light-emitting module through an impedance matching circuit. The gain amplification unit is based on a low-noise operational amplifier, and the gain coefficient is adjusted by a built-in resistor network to compensate for signal attenuation caused by long-distance transmission. Schmitt triggers perform edge steepening and jitter elimination on amplified signals, and repair logic level distortion caused by transmission. The signal forwarding unit forwards the shaped signal to the subsequent LED light-emitting module through a push-pull output circuit; The power management module integrates a DC-DC converter to supply power to each unit of the relay module.

[0053] It should be noted that this solution addresses the signal attenuation and distortion issues of long-distance LED module chains through a five-stage signal processing link in the relay module: signal reception → gain amplification → Schmitt triggering → signal forwarding → power management. Specifically, a π-type impedance matching circuit is used to calibrate the input impedance to match the output impedance of the preceding LED module, eliminating standing wave interference caused by signal reflection; a low-noise operational amplifier with an integrated resistor network enables adjustable gain, and a hardware DIP switch selects the gain to compensate for signal attenuation; a Schmitt trigger inverter with positive and negative threshold voltages is used to steepen the edges and eliminate jitter of the amplified signal; a push-pull output circuit enables delay-free forwarding of the shaped signal; and an integrated DC-DC converter provides stable power to each unit of the relay module.

[0054] Example 4 Based on the above-described Embodiment 1, Embodiment 2, or Embodiment 3, this embodiment provides further technical solutions.

[0055] If the deployment density of relay modules is too high, it will increase hardware costs; if it is too low, it will not be able to effectively compensate for signal loss. Therefore, under the premise of controlling costs, this embodiment provides a further technical solution to ensure that N intelligent LED light-emitting modules can accurately resolve color data and achieve stable light emission.

[0056] In this solution, the relay module also includes a signal strength detection unit, an adaptive gain amplification unit, and a triggering unit. The signal strength detection unit uses a voltage comparator to detect the peak amplitude of the serial data signal input from the front-end intelligent LED light-emitting module in real time. The adaptive gain amplification unit adjusts the amplification factor according to the peak amplitude of the serial data signal, and the input signal amplitude is inversely proportional to the amplification factor. The triggering unit adjusts the triggering of the relay module according to preset rules: one relay module is deployed between every 10 intelligent LED light-emitting modules; the default initial interval is that the relay module between every 20 intelligent LED light-emitting modules is set to the open state; if the front-end output signal amplitude is detected to be ≤2.5V for 3 consecutive times, the interval is reduced to 10 LED light-emitting modules; if the front-end output signal amplitude is detected to be >3.0V for 5 consecutive times, the interval is increased to 30 LED light-emitting modules.

[0057] It should be noted that the signal strength detection unit detects the peak amplitude of the input signal in real time through a voltage comparator, and the adaptive gain amplification unit adjusts the amplification factor according to the amplitude to achieve dynamic calibration of the signal amplitude; the triggering unit dynamically adjusts the deployment interval of the relay module according to the signal amplitude, effectively avoiding the flickering or extinguishing of the LED light-emitting module due to signal changes, ensuring continuous and stable operation of the light-emitting module chain and improving stability.

[0058] Example 5 See Figure 3As shown, this embodiment provides a multi-lamp head single-wire signal processing method, used in applying the multi-lamp head single-wire signal processing device provided in Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4. The method includes the following steps: S101. The main control module sends a serial data signal to the cascaded light-emitting module chain through the PWM output interface. The serial data signal includes the color data of each intelligent LED light-emitting module in the cascaded light-emitting module chain, and the data is encoded in a serial manner. In step S101, the main control module generates a serial data signal through the PWM output interface. The main control module serially encodes the color data of each intelligent LED light-emitting module. The encoding rule distinguishes logic values ​​based on the duration of the high level. The main control module sends the serial data signal to the cascaded light-emitting module chain through a single signal line. S102. A cascaded light-emitting module composed of N intelligent LED light-emitting modules connected in series via a single signal line receives the serial data signal. Each intelligent LED light-emitting module performs the following operations in sequence: identifies the color data segment corresponding to itself in the serial data signal, and obtains its own color data by detecting the high-level duration of the data segment; drives its own light-emitting unit to present the corresponding color based on the obtained color data; and transmits the remaining unparsed serial data signal to the subsequent LED light-emitting module without delay. In step S102, after each intelligent LED light-emitting module is powered on, it continuously monitors the serial data signal input by a single signal line. The high-level duration of the signal is monitored periodically by an internal timer. When a match with the frame synchronization code sent by the main control module is continuously detected, it is determined to be the start of a frame and the subsequent data parsing process is activated. Starting from the frame synchronization code, the position of the corresponding color data segment of each intelligent LED light-emitting module is calculated according to the rule of the 24-bit color data corresponding to each intelligent LED light-emitting module. When the serial data signal input by the signal line is transmitted to its corresponding data segment, the data parsing process is triggered. If it has not reached the corresponding data segment, the input signal is directly transmitted to the next stage.

[0059] S103. A relay module is set between each consecutive preset number of intelligent LED light-emitting modules in the cascaded light-emitting module chain. The relay module performs the following operations: receiving serial data signals transmitted by the preceding intelligent LED light-emitting module or the previous relay module; amplifying and shaping the power of the received serial data signals; and transmitting the processed serial data signals to the following LED light-emitting module or the next relay module.

[0060] In step S103, in the cascaded light-emitting module chain, one relay module is set between every M consecutive intelligent LED light-emitting modules. The relay module receives the serial data signal transmitted by the preceding LED light-emitting module or the previous relay module, amplifies the signal amplitude from ≤1V to 5V through a low-noise operational amplifier, and compresses the signal rise / fall time through a Schmitt trigger to eliminate noise jitter. The relay module then transmits the processed serial data signal to the subsequent LED light-emitting module or the next relay module.

[0061] It should be noted that in this embodiment, the power amplification function of the relay module effectively offsets the energy loss of the serial data signal during transmission through the front-end LED light-emitting module on a single signal line, ensuring that the signal amplitude received by the subsequent LED light-emitting module remains within a preset threshold range, thus solving the problem of color data parsing failure caused by insufficient signal strength. The edge shaping unit of the relay module adopts a Schmitt trigger or equivalent circuit structure, reducing the edge jitter amplitude during signal transmission. This allows the subsequent LED light-emitting module to accurately identify the high-level duration of the serial data signal, improving the accuracy of color data parsing and avoiding color display deviations, flickering, or errors caused by jitter. Through the periodic deployment of the relay module, the number of intelligent LED light-emitting modules that can be connected in series on a single signal line can be easily expanded while controlling hardware costs, greatly broadening the application scenarios of the device, such as large-scale commercial lighting, outdoor landscape displays, and long-distance decorative light strips. By combining the high-level duration resolution mechanism of the intelligent LED light-emitting module with the signal processing function of the relay module, it is ensured that all intelligent LED light-emitting modules in the entire chain can stably receive and resolve their own color data, eliminating abnormal phenomena such as the LED light-emitting modules going out and color distortion in the downstream LED light-emitting modules. This achieves a high degree of consistency in the display effect of the entire chain of LED light-emitting modules, improving the operational stability of the device and the user experience. This embodiment solves the problems of signal attenuation, edge jitter, and resolution errors when a single signal line is used to connect intelligent LED light-emitting modules in series.

[0062] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A multi-lamp head single-wire signal processing device, characterized in that, include: The main control module is used to send serial data signals through the PWM output interface; A cascaded light-emitting module chain consists of N intelligent LED light-emitting modules connected in series via a single signal line. Each intelligent LED light-emitting module acquires serial data signals through the signal line, parses its own color data by recognizing the high-level duration of the serial data signals, and drives light emission based on the color data. Unparsed serial data signals are transmitted to the next stage LED light-emitting module. A relay module is set up between consecutive intelligent LED light-emitting modules. The relay module amplifies the serial data signal and shapes its edges before continuing to transmit it to the next LED light-emitting module.

2. The multi-lamp head single-wire signal processing device according to claim 1, characterized in that, Also includes: An end-matching resistor is connected in parallel between the DOUT pin of the last smart LED light-emitting module and the ground line GND to attenuate the serial data signal.

3. The multi-lamp head single-wire signal processing device according to claim 1, characterized in that, The serial data signal is a return-to-zero code signal. The high-level duration of the return-to-zero code signal is 400ns-800ns. When the high-level duration is ≤400ns, the corresponding logic is "0". When 400ns < high-level duration ≤800ns, the corresponding logic is "1". The data frame of the serial data signal is 24 bits, which includes 8 bits of data in the red channel, 8 bits of data in the green channel, and 8 bits of data in the blue channel.

4. The multi-lamp head single-wire signal processing device according to claim 1, characterized in that, The number N of the cascaded light-emitting module chain is a positive integer ≥2. Adjacent smart LED light-emitting modules are connected by a single signal line, and the power supply terminals of all smart LED light-emitting modules are connected in parallel to the same power bus.

5. The multi-lamp head single-wire signal processing device according to claim 1, characterized in that, The intelligent LED light-emitting module includes a DIN pin, a DOUT pin, a decoding module, and a driving module. The DIN pin receives the serial data signal output by the preceding intelligent LED light-emitting module. The DOUT pin transmits the serial data signal that has not been decoded by itself to the subsequent LED light-emitting module. The decoding module analyzes the color data of the current LED light-emitting module by recognizing the high-level duration of the serial data signal. The driving module controls the RGB chip to emit light according to the decoded color data to achieve independent adjustment of brightness and color.

6. The multi-lamp head single-wire signal processing device according to claim 5, characterized in that, Each intelligent LED light-emitting module's decoding module includes a pre-stored 1-bit cascaded address identifier, and each data frame in the serial data signal is preceded by a start marker predefined by the protocol; The default cascade address identifier of each smart LED light-emitting module is "0". If the start marker of the data frame of the serial data signal is detected, its own identifier is flipped to "1" and the start marker of the data frame is forwarded to the subsequent smart LED light-emitting module. When the cascade address flag bit of the decoding module is "1", the decoding module starts to store the parsed logic code until 24 bits of color data are accumulated, and then latches the complete color data frame to the driver module. After latching the complete color data frame, the cascade address flag bit of the decoding module flips back to "0", the decoding module switches back to forwarding mode, and stops storing data.

7. The multi-lamp head single-wire signal processing device according to claim 6, characterized in that, The serial data signal is used to display the image of the pre-arranged light-emitting module chain through a method of single-frame static control and multi-frame dynamic switching.

8. The multi-lamp head single-wire signal processing device according to claim 7, characterized in that, The steps of the method for single-frame static control and multi-frame dynamic switching include: The single-frame static control steps include: the serial data signal includes at least one frame of serial data sequence, each frame of serial data sequence carries the color data of all intelligent LED light-emitting modules in the light-emitting module chain, and each frame of serial data sequence controls the light-emitting module chain to present a frame of static image; The multi-frame dynamic switching steps include: continuously sending M frames of serial data sequence, and using the color data differences of each LED light-emitting module between frames to enable the light-emitting module chain to achieve overall dynamic display; The transmission frame rate of the serial data sequence is no less than 24Hz to eliminate visual flicker.

9. The multi-lamp head single-wire signal processing device according to claim 8, characterized in that, The decoding module of the intelligent LED light-emitting module is equipped with a synchronization latch unit, which eliminates the asynchrony in brightness caused by transmission time differences among all intelligent LED light-emitting modules on each signal line. After latching a 24-bit complete color data frame, the decoding module of each smart LED light-emitting module temporarily stores the 24-bit complete data frame in the cache unit and starts the timing unit. The timing unit presets a timing threshold according to the sequential position of the smart LED light-emitting module in the light-emitting module chain. When the timing threshold is reached, the color data of the cache unit is output to the driver module to realize the synchronous switching of the bright and dark states of the entire chain of LED light-emitting modules.

10. The multi-lamp head single-wire signal processing device according to claim 9, characterized in that, The serial data signal can be equipped with a group threshold adjustment command to change the timing threshold of a specified intelligent LED light-emitting module, thereby achieving differentiated synchronous display of groups. The grouping threshold adjustment instruction includes a predefined threshold adjustment flag, a target group identifier, and a new timing threshold; Each intelligent LED light-emitting module's decoding module pre-stores its own group identifier; When the intelligent LED light-emitting module detects the threshold adjustment mark, it compares the target group identifier with its own group identifier. If they match, the timing threshold of the timing unit is updated to the new timing threshold. By adjusting the timing thresholds of different groups of intelligent LED light-emitting modules, each group of intelligent LED light-emitting modules can synchronously lock color data at different time points to achieve: alternating display of odd and even groups, or partitioned gradient layered image display, or sequential lighting of flowing lights for extended display.

11. The multi-lamp head single-wire signal processing device according to claim 8, characterized in that: The master control unit generates the trigger interval of the start marker or the transmission priority of the color data frame in the serial data signal according to the preset graphic requirements. By utilizing the transmission delay difference of the serial data signals received by the intelligent LED light-emitting modules in different sequences in the light-emitting module chain, the LED light-emitting modules at different positions trigger the latching and driving of color data at different time points, so as to achieve: a flowing light extension display from one end of the light-emitting module chain to the other end, or a gradual brightening and dimming animation display based on position gradient, or a directional chasing and scanning graphic display.

12. The multi-lamp head single-wire signal processing device according to claim 1, characterized in that: The relay module includes: a signal receiving unit, a gain amplification unit, a Schmitt trigger, a signal forwarding unit, and an integrated power management unit. The relay module is connected in series between any two intelligent LED light-emitting modules in the light-emitting module chain or between the starting end of the light-emitting module chain and the main control end. The signal receiving unit receives the serial data signal from the front-end intelligent LED light-emitting module through an impedance matching circuit. The gain amplification unit is based on a low-noise operational amplifier, and the gain coefficient is adjusted by a built-in resistor network to compensate for signal attenuation caused by long-distance transmission. Schmitt triggers perform edge steepening and jitter elimination on amplified signals, and repair logic level distortion caused by transmission. The signal forwarding unit forwards the shaped signal to the subsequent LED light-emitting module through a push-pull output circuit; The power management module integrates a DC-DC converter to supply power to each unit of the relay module.

13. A method for processing single-wire signals from multiple lamp heads, characterized in that, For use in the multi-lamp head single-wire signal processing device according to any one of claims 1 to 12, the method includes the steps of: The main control module sends a serial data signal to the cascaded light-emitting module chain through the PWM output interface. The serial data signal contains the color data of each smart LED light-emitting module in the cascaded light-emitting module chain, and the data is encoded in a serial manner. A cascaded light-emitting module, composed of N intelligent LED light-emitting modules connected in series via a single signal line, receives the serial data signal. Each intelligent LED light-emitting module performs the following operations in sequence: identifies the color data segment corresponding to itself in the serial data signal, and parses its own color data by detecting the high-level duration of the data segment; drives its own light-emitting unit to present the corresponding color based on the parsed color data; and transmits the remaining unparsed serial data signal to the subsequent LED light-emitting module without delay. In a cascaded light-emitting module chain, a relay module is set between each consecutive preset number of intelligent LED light-emitting modules. The relay module performs the following operations: receiving serial data signals transmitted by the preceding intelligent LED light-emitting module or the previous relay module; amplifying and shaping the power of the received serial data signals; and transmitting the processed serial data signals to the following LED light-emitting module or the next relay module.

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