A composite signal lamp adaptive display method based on signal channel priority discrimination

Abstract

The application discloses a composite signal lamp adaptive display method based on signal channel priority discrimination, and has excellent compatibility with a signal control machine. The signal control machine does not need to additionally increase full-screen signal lamp driving, and only needs to independently control each output terminal in a traditional mode, and the switching of display content is completed by internal intelligent discrimination of the composite signal lamp group, so that the requirement and cost of software and hardware upgrading and reconstruction of the existing signal control machine are greatly reduced. Meanwhile, the discrimination logic of the left-turn direction indication priority over the full screen is clear and definite, the hardware implementation is simple, the circuit structure is stable and reliable, the complex display mode discrimination function is sunk from the control machine to the signal lamp terminal, the system burden caused by the control machine executing the complex multi-channel collaborative switching time sequence is avoided, and the adaptation capacity with the traditional equipment is obviously improved.

Description

Technical Field

[0001] This application relates to the field of traffic light technology, and in particular to an adaptive display method for composite traffic lights based on signal channel priority discrimination. Background Technology

[0002] With the dynamic changes in urban traffic flow, the signal control phases at intersections need to be flexibly switched. For example, during off-peak hours, the number of phases can be reduced (such as switching from four-phase control, which includes a dedicated left-turn phase, to two-phase control that allows both left-turn and straight-ahead traffic). During peak hours, the number of phases (such as the left-turn phase) needs to be increased to improve the efficiency of left-turning vehicles.

[0003] Traditional solutions typically fall into two categories: Independent light group switching: Independent left-turn arrow light groups and full-screen light groups are set up, with the signal controller separately controlling their illumination and deactivation. When switching from peak hours (four-phase) to off-peak hours (two-phase), the left-turn arrow light group will turn off, easily misleading road users into believing it's a signal light malfunction, posing a safety hazard. Traditional composite signal light control: Two signal channels are set up on the same group of lights, with the signal controller actively and precisely controlling the on / off state of each channel. The internal logic of the composite signal light determines the dynamic switching of the displayed pattern. While this method solves the misjudgment problem, it requires the signal controller to have complex logic judgment and multi-channel coordinated switching control capabilities. Existing signal controllers (especially the widely used traditional ones) require an additional full-screen signal light driver, resulting in high upgrade and modification costs. This invention proposes an adaptive display method for composite traffic lights based on signal channel priority. This method enables composite traffic lights to automatically determine and display the correct pattern (left arrow or full screen) based on the input signal, without requiring multiple switching timing controls by the signal controller. It has strong compatibility, low implementation cost, and can effectively avoid traffic participants misinterpreting the signal status. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an adaptive display method for composite traffic lights based on signal channel priority discrimination. This method enables composite traffic lights to automatically determine and display the correct pattern (left arrow or full screen) according to the input signal, without requiring the signal controller to perform complex multi-channel switching timing control. It has strong compatibility, low implementation cost, and avoids the situation where all three traffic lights (red, yellow, and green) are off. It also effectively prevents traffic participants from misinterpreting the signal status.

[0005] To achieve the above objectives, this application provides the following technical solution: An adaptive display method for composite traffic lights based on signal channel priority determination, the specific steps of which are as follows: S1. Dual-channel architecture configuration: The composite signal light group supports left turn direction indication and full-screen mode, and each light color has an independent terminal; the signal controller outputs signals through the left turn direction indication and full-screen channels, and its full-screen terminal is connected in parallel with the full-screen light group to the full-screen channel. S2, Priority Rule Preset: The lamp group has a built-in priority judgment and driving circuit to establish a rule that the left arrow signal channel takes precedence over the full-screen channel; S3. Input status determination: Priority determination and drive circuit detection of two-channel voltage to identify left turn direction, full screen or no signal status; S4. Adaptive display switching: When there is voltage in the left arrow signal channel, the light group displays a left turn direction indicator pattern; when there is no voltage in this channel and the full-screen channel has voltage, the full-screen pattern is displayed; when there is no voltage in both channels, the light group is off. S5, Phase Mode Switching: The signal controller independently controls the voltage of the two channels to achieve phase switching between full screen and left turn direction indication; during switching, the light group automatically changes the display status according to priority rules.

[0006] Preferably, in step S1, the dual-channel architecture configuration is as follows: S1.1 The composite signal light group shall have at least two display modes: left turn direction indication and full screen. Each of the red, yellow and green lights shall be provided with an independent physical terminal. Each light color terminal shall be connected to the left turn direction indication and full screen drive circuit inside the light group, forming a hardware architecture that supports independent driving of the two patterns. S1.2 The output terminals of the traffic signal controller are divided into a first signal channel, a second signal channel, a third signal channel, and a common neutral line. The first signal channel outputs red left arrow, yellow left arrow, and green left arrow drive signals. The second signal channel outputs red full screen, yellow full screen, and green full screen drive signals. The neutral line serves as the common circuit terminal for each light group. The red left arrow, yellow left arrow, and green left arrow terminals of the composite signal light group are connected one-to-one with the corresponding output terminals of the first signal channel. The red full screen, yellow full screen, and green full screen terminals of the composite signal light group are connected with the corresponding output terminals of the second signal channel. The red full screen, yellow full screen, and green full screen terminals of the full screen signal light group are connected with the corresponding output terminals of the second signal channel. The full screen terminals of the composite signal light group are connected in parallel with the terminals of the full screen signal light group and then connected to the corresponding output terminals of the second signal channel, so that the full screen display status of the two light groups is controlled by the same channel. The neutral line terminals of both the composite signal light group and the full screen signal light group are connected to the common neutral line, forming a complete AC drive circuit.

[0007] Preferably, in step S2, the priority rule is preset in the following specific way: S2.1. A priority discrimination and driving circuit is configured for each color of the composite signal light group. The circuit collects the voltage signal input from the signal controller in real time, identifies and compares the input status of the two signal channels under the same color, and drives the corresponding display pattern to light up and turns off the non-priority circuit according to the preset priority rules. S2.2. A preset rule is set to prioritize the left turn direction indicator signal channel over the full-screen signal channel. This rule is then built into the priority judgment and driving circuit, enabling the composite signal light group to autonomously determine and switch display modes based on the input voltage. The signal controller only needs to independently control the voltage output of each channel.

[0008] Preferably, in step S3, the input state determination method is as follows: S3.1 The drive circuit detects the voltage signal output by the signal controller in real time, and combines and judges the voltage status of the left turn direction indicator signal channel and the full screen signal channel under the same light color to determine whether the current input signal is a left turn direction signal, a full screen signal or no signal, and outputs the status judgment result. S3.2. Based on the state determination results, establish the mapping relationship between channel input and display mode. When the left turn direction indicator signal channel has voltage, it is mapped to a left turn direction signal. When the channel has no voltage and the full screen signal channel has voltage, it is mapped to a full screen signal. When both channels have no voltage, it is mapped to a no signal state. The mapping results are then transmitted to the display driver circuit.

[0009] Preferably, step S3.1 is performed as follows: S3.11 The drive circuit detects the voltage signals output by each channel of the signal controller in real time, and synchronously collects the voltage status of the left turn direction indicator signal channel and the full screen signal channel under the same light color. It identifies the current electrical input status of the two channels and forms the channel voltage status collection result as the basis for combination judgment. S3.12. Based on the channel voltage status acquisition results, perform combined judgment. According to the voltage status combination of the left turn direction indicator signal channel and the full screen signal channel under the same light color, determine whether the current input signal is a left turn direction signal, a full screen signal, or no signal. Output the channel input status classification judgment result and transmit the result to the display driver circuit.

[0010] Preferably, step S3.2 is performed as follows: S3.21. Preset the correspondence between channel voltage state and display mode. When the left turn direction indicator signal channel has voltage, it corresponds to the left turn direction indicator display mode. When the channel has no voltage and the full screen signal channel has voltage, it corresponds to the full screen display mode. When both channels have no voltage, it corresponds to the off mode. This serves as the basis for the state response from voltage state to display mode. S3.22. Based on the channel voltage status acquisition results and matching the above correspondence, the current voltage status combination is converted into a display mode control command and output to the display drive circuit. The display drive circuit drives the composite signal lamp group to light up the corresponding pattern or perform an extinguishing operation according to the command, realizing the status response from input status to display output.

[0011] Preferably, in step S4, the adaptive display switching is performed in the following way: S4.1 Display drive circuit receives priority judgment result. When there is effective voltage input in the left turn direction indicator signal channel, drive the composite signal lamp group to light up the left turn direction indicator pattern of that lamp color, and at the same time turn off the drive circuit corresponding to the full screen signal channel so that the input state of the full screen channel does not participate in the current lamp color display judgment. S4.2 When there is no effective voltage input to the left turn direction indicator signal channel and there is an effective voltage input to the full screen signal channel, the display drive circuit drives the composite signal lamp group to light up the full screen pattern of that light color. When there is no effective voltage input to either channel, the light color is controlled to turn off, forming a display output corresponding to the channel input state.

[0012] Preferably, step S4.1 is performed as follows: S4.11. Based on the state determination result, when there is an effective voltage input in the left turn direction indicator signal channel, the display drive circuit drives the left turn direction indicator light-emitting unit of the corresponding light color inside the composite signal lamp group to light up, outputs the left turn direction indicator pattern of that light color, and maintains the display state until the channel voltage state changes. S4.12 During the output of the left turn direction indicator pattern, the drive circuit corresponding to the full-screen signal channel is simultaneously shut off to block the influence of the full-screen channel voltage input on the current light color display determination, ensuring that the high-priority display mode exclusively occupies the current light color output port resources, and avoiding abnormal pattern superposition display caused by simultaneous driving of dual channels.

[0013] Preferably, step S4.2 is performed as follows: S4.21 When there is no effective voltage input to the left turn direction indicator signal channel and there is an effective voltage input to the full screen signal channel, the display drive circuit drives the full screen light-emitting unit of the corresponding light color inside the composite signal light group to light up, outputs the full screen pattern of that light color, and maintains this display state until the channel voltage state changes. S4.22 When there is no effective voltage input in both the left turn direction indicator signal channel and the full screen signal channel, the display drive circuit shuts off all drive circuits for that light color, controls the corresponding light color of the composite signal light group to turn off, so that the light group has no display output under that light color, forming an extinguishing response corresponding to the dual-channel no input state, and reserving state change conditions for voltage re-input during subsequent phase switching.

[0014] Preferably, in step S5, the phase mode switching is performed in the following manner: S5.1 The signal controller independently controls the voltage output of the left turn direction indicator and the full screen two channels according to the traffic control requirements of the intersection. By changing the presence or absence of the voltage of the two channels, the phase increase or decrease of the full screen and the left turn direction indicator can be switched. The voltage output status of each channel is controlled independently, without the need to execute the multi-channel coordinated switching sequence. S5.2 During phase switching, the composite signal light group detects the voltage state changes of the two channels in real time according to the built-in priority judgment rules and automatically completes the display pattern conversion. During the channel voltage switching, at least one channel maintains effective display output, so that the light group maintains effective display state throughout the phase change process and avoids traffic participants misreading the signal due to signal extinguishing.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention exhibits excellent compatibility with signal controllers. The signal controller does not require additional full-screen signal light drivers; it only needs to independently control each output terminal using traditional methods. The switching of displayed content is intelligently determined internally by the composite signal light group, significantly reducing the requirements and costs of upgrading existing signal controller hardware and software. Simultaneously, the logic of prioritizing left-turn direction indication over full-screen display is clear and straightforward, with simple hardware implementation and a stable and reliable circuit structure. By offloading the complex display mode determination function from the controller to the signal light terminal, it avoids the system burden caused by the controller executing complex multi-channel collaborative switching sequences, significantly improving compatibility with existing traditional equipment.

[0016] 2. This invention achieves adaptive seamless switching and flexible phase control. The composite traffic light group can automatically and instantaneously complete the display mode switching according to the input voltage. From the perspective of traffic participants, the light group is always in normal working condition, with only the displayed pattern changing according to traffic indication needs. This completely solves the problem of traffic participants misinterpreting the light group's failure as a traffic light malfunction during phase switching. Traffic management personnel can configure the timing scheme of the signal controller just like controlling independent light groups. In four-phase mode, it provides timing for left turn direction indication and full-screen two-channel timing; in two-phase mode, it only provides timing for full-screen channels. The traffic lights automatically adapt to the display mode, providing a flexible and economical terminal hardware foundation for realizing intelligent transportation applications. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating the steps of the method described in this application.

[0018] Figure 2 This diagram illustrates the connection between the output signal channel of the signal controller and the signal light in this application.

[0019] Figure 3 This is a block diagram showing the priority level and driving circuit principle of this application.

[0020] Figure 4 This is a flowchart of the internal priority level judgment and display control of the composite signal light in this application. Detailed Implementation

[0021] The technical solutions of 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 of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0023] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0024] Example 1: Please refer to Figure 1 - Figure 4 An adaptive display method for composite traffic lights based on signal channel priority discrimination is described below: S1. Dual-channel architecture configuration: The composite signal light group supports left turn direction indication and full-screen mode, and each light color has an independent terminal; the signal controller outputs signals through the left turn direction indication and full-screen channels, and its full-screen terminal is connected in parallel with the full-screen light group to the full-screen channel. S2, Priority Rule Preset: The lamp group has a built-in priority judgment and driving circuit to establish a rule that the left arrow signal channel takes precedence over the full-screen channel; S3. Input status determination: Priority determination and drive circuit detection of two-channel voltage to identify left turn direction, full screen or no signal status; S4. Adaptive display switching: When there is voltage in the left arrow signal channel, the light group displays a left turn direction indicator pattern; when there is no voltage in this channel and the full-screen channel has voltage, the full-screen pattern is displayed; when there is no voltage in both channels, the light group is off. S5, Phase Mode Switching: The signal controller independently controls the voltage of the two channels to achieve phase switching between full screen and left turn direction indication; during switching, the light group automatically changes the display status according to priority rules.

[0025] In this embodiment: S1 configures a composite signal light group that supports both left-turn direction indication and full-screen display modes, and sets independent physical wiring terminals for each of the red, yellow, and green lights, thus constructing the hardware foundation for a single light group to support dual-mode display. The full-screen signal wiring terminal of the composite signal light group is connected in parallel to the corresponding terminal of the full-screen signal light group to the full-screen signal channel, allowing the signal controller to synchronously drive the full-screen display of the two light groups through the same channel. This reduces the number of independent light groups and the complexity of the wiring, lowers the system deployment cost, and provides the hardware conditions for subsequent priority-based adaptive display.

[0026] S2 configures priority discrimination and driving circuits for each light color within the composite traffic light group, and embeds the discrimination rule that the left turn direction indicator signal channel takes precedence over the full-screen signal channel into the circuit, enabling the traffic lights to have the local decision-making ability to autonomously determine the display mode based on the input voltage. This setting moves the display mode discrimination logic down from the signal controller to the traffic light terminal, eliminating the need for the signal controller to add complex logic judgments and multi-channel collaborative switching control functions, reducing the requirements for upgrading the existing signal controller's hardware and software, and significantly improving compatibility with existing traditional equipment.

[0027] S3 uses a priority discrimination and drive circuit to monitor the voltage status of two signal channels under the same light color in real time. It combines and identifies the input information of the left turn direction indicator and full-screen signal channels to accurately determine whether the current input is a left turn direction signal, a full-screen signal, or no signal. This step establishes an accurate correspondence between channel input status and display output, ensuring that the traffic lights can promptly perceive the output intention of the signal controller, avoiding display misjudgments caused by unclear status recognition, and providing a reliable basis for correct switching of display modes.

[0028] S4, based on priority determination by the display drive circuit, drives the light group to display the left turn direction indicator pattern and shuts off the corresponding circuit of the full-screen channel when there is voltage in the left turn direction indicator signal channel. When there is no voltage in the left turn direction indicator signal channel and voltage in the full-screen channel, the full-screen pattern is displayed. When there is no voltage in both channels, the light color is turned off, thus achieving adaptive display output corresponding to the channel input state. This step, through hardware-level priority arbitration, ensures that only one display mode is effectively output under the same light color, avoiding pattern superposition and display conflicts caused by simultaneous driving of dual channels, and guaranteeing the clarity and uniqueness of traffic signal display.

[0029] The S5 signal controller independently controls the voltage output of both the left-turn direction indicator and the full-screen indicator channels according to the traffic control needs of the intersection at different times, realizing the phase increase / decrease switching between the full-screen and left-turn direction indicators. During the switching process, the composite signal light group detects voltage changes in real time according to the built-in priority rules and automatically completes the display pattern conversion, ensuring that the light group always maintains an effective display state during the phase transition. It will not cause all lights to go out due to channel switching, eliminating the safety hazard of traffic participants misinterpreting phase switching as a signal light malfunction, and at the same time simplifying the timing control logic of the signal controller.

[0030] Compared to existing technologies where the signal controller needs to centrally determine the output status of each channel and execute complex multi-channel collaborative switching timing, this method integrates priority determination and display driving logic into the composite signal light group, achieving terminal adaptive determination of the display mode. Existing technologies require adding light group drivers or upgrading control software to the signal controller to support composite channel switching, resulting in high implementation costs and poor compatibility with existing equipment. Improper timing control during switching can easily lead to light group extinguishing, causing traffic participants to mistakenly believe it is a signal light malfunction. This method, through a dual-channel architecture and a local priority determination mechanism, allows the signal controller to independently control the voltage output of each channel according to traditional timing methods, without needing to execute multi-channel collaborative switching timing, significantly reducing the modification requirements of the signal controller and the system deployment cost. During phase switching, the composite signal light group automatically completes the display pattern conversion according to built-in rules, ensuring that the light group always maintains effective display, avoiding the risk of misreading caused by signal extinguishing, improving the reliability and safety of traffic signal control, and providing an economical and feasible terminal solution for flexible phase management in intelligent transportation.

[0031] Example 2: Please refer to Figure 1 - Figure 4 In step S1, the specific configuration method for the dual-channel architecture is as follows: S1.1 The composite signal light group shall have at least two display modes: left turn direction indication and full screen. Each of the red, yellow and green lights shall be provided with an independent physical terminal. Each light color terminal shall be connected to the left turn direction indication and full screen drive circuit inside the light group, forming a hardware architecture that supports independent driving of the two patterns. S1.2 The output terminals of the traffic signal controller are divided into a first signal channel, a second signal channel, a third signal channel, and a common neutral line. The first signal channel outputs red left arrow, yellow left arrow, and green left arrow drive signals. The second signal channel outputs red full screen, yellow full screen, and green full screen drive signals. The neutral line serves as the common circuit terminal for each light group. The red left arrow, yellow left arrow, and green left arrow terminals of the composite signal light group are connected one-to-one with the corresponding output terminals of the first signal channel. The red full screen, yellow full screen, and green full screen terminals of the composite signal light group are connected with the corresponding output terminals of the second signal channel. The red full screen, yellow full screen, and green full screen terminals of the full screen signal light group are connected with the corresponding output terminals of the second signal channel. The full screen terminals of the composite signal light group are connected in parallel with the terminals of the full screen signal light group and then connected to the corresponding output terminals of the second signal channel, so that the full screen display status of the two light groups is controlled by the same channel. The neutral line terminals of both the composite signal light group and the full screen signal light group are connected to the common neutral line, forming a complete AC drive circuit.

[0032] In this embodiment: S1.1 By configuring the composite traffic light group to support at least two display modes—left turn direction indication and full-screen—and by setting independent physical terminals for each of the red, yellow, and green light colors, the terminals of each light color are connected to the corresponding drive circuit inside the light group, forming a hardware architecture that supports independent driving of the two patterns. This configuration allows a single traffic light group to achieve the display function that traditionally requires multiple independent light groups to be controlled separately, reducing the number of independent light groups required at intersections and the installation space occupied, lowering hardware deployment costs and wiring complexity. It also avoids the safety hazard of traffic participants misinterpreting a traffic light malfunction due to the shutdown of a single independent light group, and provides the terminal hardware conditions for subsequent priority-based adaptive display mode switching.

[0033] S1.2 divides the output of the traffic signal controller into a first signal channel, a second signal channel, a third signal channel, and a common neutral line, respectively outputting red left arrow, yellow left arrow, and green left arrow drive signals, and red full screen, yellow full screen, and green full screen drive signals. This provides the hardware foundation for multi-channel coordinated control of composite signal light groups and full-screen signal light groups. This channel division method allows the controller to independently control the voltage output of each channel according to the traditional timing method, without the need to add complex centralized discrimination and multi-channel coordinated switching functions, reducing the requirements for upgrading the existing controller's hardware and software. By connecting the red left arrow, yellow left arrow, and green left arrow terminals of the composite signal light group to the first signal channel one by one, and connecting the red full screen, yellow full screen, and green full screen terminals to the second signal channel, physical isolation and independent driving of the left turn direction indication and full-screen display modes within a single light group are achieved. This provides a clear channel input source for priority discrimination and drive circuits, enabling the light group to autonomously determine the display mode based on the voltage status of each channel. By connecting the red, yellow, and green full-screen terminals of the full-screen traffic light group in parallel with the full-screen terminal of the composite traffic light group and then synchronously connecting them to the second signal channel, unified control of the full-screen display status of the two groups of lights is achieved. This parallel connection method eliminates the need for the signal controller to add an independent full-screen drive channel for the full-screen traffic light group. It can directly utilize the existing second signal channel to synchronously drive the two groups of lights, reducing the requirement for the number of output ports of the controller, lowering hardware deployment costs and wiring complexity. At the same time, the third signal channel, as an existing output resource of the controller, does not need to be connected to achieve unified full-screen control of the two groups of lights, further improving compatibility with existing traditional signal control equipment. By connecting the neutral terminals of both the composite traffic light group and the full-screen traffic light group to the common neutral line output by the traffic signal controller, a complete AC drive circuit is formed. This common neutral line architecture provides a stable electrical return path for each color light-emitting unit of the two groups of lights, ensuring that the light-emitting unit can obtain a continuous and stable drive current when the corresponding channel voltage is valid. This avoids drive abnormalities or display flickering caused by incomplete circuits, ensuring the stability and reliability of traffic signal display.

[0034] Compared to existing technologies that achieve phase switching by setting up independent left-turn arrow light groups and full-screen light groups, this approach achieves terminal integration of composite display functions without changing the installation location and equipment of existing road traffic lights through a dual-mode hardware architecture and dual-channel parallel drive design for a single light group. Existing solutions require the independent left-turn light group to be turned off when the phase decreases, which can easily be misinterpreted by traffic participants as a signal light malfunction, posing a traffic safety hazard. Furthermore, existing composite signal light control schemes require the signal controller to have complex multi-channel collaborative switching control capabilities, resulting in high upgrade and modification costs for existing equipment. This approach, by integrating the dual-mode drive circuit within a single light group and using a second signal channel in parallel to reuse the existing drive output, significantly reduces system hardware deployment costs and controller modification requirements, improves compatibility with existing traffic signal infrastructure, and lays the hardware foundation for subsequent autonomous display mode discrimination and switching based on input voltage, achieving the technical goal of deploying composite signal light functions at a lower cost.

[0035] Example 3: Please refer to Figure 1 - Figure 4 In step S2, the priority rule is preset in the following way: S2.1. A priority discrimination and driving circuit is configured for each color of the composite signal light group. The circuit collects the voltage signal input from the signal controller in real time, identifies and compares the input status of the two signal channels under the same color, and drives the corresponding display pattern to light up and turns off the non-priority circuit according to the preset priority rules. S2.2. A preset rule is set to prioritize the left turn direction indicator signal channel over the full-screen signal channel. This rule is then built into the priority judgment and driving circuit, enabling the composite signal light group to autonomously determine and switch display modes based on the input voltage. The signal controller only needs to independently control the voltage output of each channel.

[0036] In this embodiment: S2.1 By configuring a priority discrimination and driving circuit for each light color within the composite traffic light group, this circuit can collect the voltage signal input from the signal controller in real time, identify and compare the input status of two signal channels under the same light color, and drive the corresponding display pattern to light up according to the preset priority rules, while simultaneously shutting off non-priority circuits. This setting integrates the display mode discrimination and driving function into the traffic light terminal, realizing local real-time processing of channel input status. By actively shutting off non-priority circuits at the hardware level, it prevents pattern superposition and display conflicts caused by simultaneous driving of dual channels, ensuring the clarity and uniqueness of traffic signal output, and providing clear and unambiguous visual instructions for traffic participants.

[0037] S2.2 establishes a pre-defined rule prioritizing the left-turn direction indicator signal channel over the full-screen signal channel, embedding this rule into the priority judgment and drive circuit. This allows the composite traffic light group to autonomously determine and switch display modes based on the input voltage, while the signal controller only needs to independently control the voltage output of each channel in the traditional manner. This setup transfers the complex display logic judgment task from the signal controller to the traffic light itself. The controller does not need to add multi-channel collaborative switching timing control functions, nor does it need to upgrade the existing hardware and software structure to adapt to the composite traffic light group. This terminal autonomous judgment mechanism significantly improves the system's compatibility with existing traditional signal control equipment, reduces the functional expansion cost and deployment threshold of the signal controller, and makes the timing scheme design more flexible and convenient. Traffic management personnel can configure output channels as if controlling independent light groups, without having to consider complex channel switching timing coordination.

[0038] Compared to existing technologies where the signal controller needs to centrally determine the output status of each channel and execute multi-channel coordinated switching timing control, this approach integrates priority determination and drive circuitry into the composite traffic light group. It also solidifies the rule that the left arrow signal channel takes precedence over full-screen channels into the terminal hardware, achieving terminal-based and adaptive display mode determination. This solution pushes the determination logic down to the traffic light itself, allowing the signal controller to independently output voltage for each channel, significantly reducing the controller's functional burden and upgrade costs. The composite traffic light group autonomously completes instantaneous switching of display modes based on built-in rules. This improves system response speed while ensuring the uniqueness and continuity of the display status during phase transitions, effectively eliminating safety hazards caused by control timing deviations. This provides a low-cost terminal technology path for adapting traditional signal control equipment to flexible phase management in intelligent transportation.

[0039] Example 4: Please refer to Figure 1 - Figure 4 In step S3, the specific method for determining the input state is as follows: S3.1 The drive circuit detects the voltage signal output by the signal controller in real time, and combines and judges the voltage status of the left turn direction indicator signal channel and the full screen signal channel under the same light color to determine whether the current input signal is a left turn direction signal, a full screen signal or no signal, and outputs the status judgment result. S3.2. Based on the state determination results, establish the mapping relationship between channel input and display mode. When the left turn direction indicator signal channel has voltage, it is mapped to a left turn direction signal. When the channel has no voltage and the full screen signal channel has voltage, it is mapped to a full screen signal. When both channels have no voltage, it is mapped to a no signal state. The mapping results are then transmitted to the display driver circuit.

[0040] In this embodiment: S3.1 The driving circuit detects the voltage signals output by the signal controller to each channel in real time, and performs combined discrimination on the voltage status of the left turn direction indicator and the full-screen two channels under the same light color. It accurately determines whether the current input signal is a left turn direction signal, a full-screen signal, or no signal, and outputs the status judgment result. This discrimination process is completed locally on the traffic light in real time, effectively shortening the time interval from voltage input to status recognition and improving the response sensitivity of display mode switching. Through the combined discrimination method, the system can simultaneously identify the presence or absence of voltage information in both channels, avoiding recognition errors caused by omission of a single channel status or detection timing deviations. This ensures that the status judgment result is consistent with the actual output intention of the signal controller, providing a reliable status basis for accurate switching of subsequent display modes.

[0041] S3.2 Based on the state determination results, a mapping relationship between channel inputs and display modes is established. A channel with voltage is mapped to a left-turn direction indicator signal; a channel with no voltage and a full-screen signal channel with voltage is mapped to a full-screen signal; and both channels with no voltage are mapped to a no-signal state. The mapping results are then transmitted to the display driver circuit. This mapping mechanism establishes a clear and fixed correspondence between voltage input combinations and display outputs. After receiving the mapping results, the display driver circuit can directly execute the corresponding lighting or extinguishing actions without secondary logic judgment, simplifying the display control process. Simultaneously, the fixed mapping relationship ensures the determinism and consistency of display outputs under different channel input states, avoiding display anomalies caused by ambiguous state transitions or unclear judgment rules, and guaranteeing the standardization and stability of traffic signal displays.

[0042] This step integrates voltage detection, combination discrimination, and pattern mapping functions into the composite traffic light group, realizing terminal-level input status recognition. However, this approach suffers from insufficient responsiveness when traffic conditions change rapidly. This solution uses a drive circuit to detect voltage changes in real time and promptly complete combination discrimination and pattern mapping, enabling the traffic light to autonomously recognize input status locally, reducing the computational burden on the controller and upgrade costs. It ensures the immediacy and accuracy of displayed status transitions during phase switching, effectively avoiding display conflicts or signal misreadings caused by status recognition delays, thus improving the reliability and timeliness of traffic signal control.

[0043] Example 5: Please refer to Figure 1 - Figure 4 The specific method for step S3.1 is as follows: S3.11 The drive circuit detects the voltage signals output by each channel of the signal controller in real time, and synchronously collects the voltage status of the left turn direction indicator signal channel and the full screen signal channel under the same light color. It identifies the current electrical input status of the two channels and forms the channel voltage status collection result as the basis for combination judgment. S3.12. Based on the channel voltage status acquisition results, perform combined judgment. According to the voltage status combination of the left turn direction indicator signal channel and the full screen signal channel under the same light color, determine whether the current input signal is a left turn direction signal, a full screen signal, or no signal. Output the channel input status classification judgment result and transmit the result to the display driver circuit.

[0044] In this embodiment: S3.11 The driving circuit synchronously acquires the voltage signals output from each channel in real time, identifies the electrical input status of the left turn direction indicator and the two full-screen channels under the same light color, and forms the channel voltage status acquisition result. This acquisition process is completed independently locally in the lamp group, improving the response sensitivity of display mode switching. The synchronous acquisition mechanism ensures the consistency of the detection timing of the voltage status of the two channels, providing a complete and accurate status basis for subsequent combination discrimination.

[0045] S3.12 performs combination discrimination based on the channel voltage status acquisition results, clearly classifying the voltage status combination of the two channels into a left-turn direction signal, a full-screen signal, or a no-signal state, and outputs the classification judgment result and transmits it to the display driver circuit. This discrimination mechanism establishes a deterministic mapping relationship between channel input and display mode. After receiving the result, the display driver circuit can directly execute the corresponding lighting or turning-off action without secondary logic parsing. Through the combination discrimination method, the system can accurately identify various voltage input combinations, preventing identification errors caused by the omission of a single channel status or detection timing deviation, and ensuring that the display output is strictly consistent with the actual timing intention of the signal controller.

[0046] This step integrates voltage synchronization acquisition and combination discrimination functions into the composite signal light group, realizing terminal-level input status recognition. This solution uses a drive circuit to synchronously acquire voltages from two channels in real time and promptly complete combination discrimination, enabling the signal light to autonomously identify input status locally. This reduces the computational burden and upgrade costs of the controller, ensuring the immediacy and accuracy of state transitions during phase switching.

[0047] Example 6: Please refer to Figure 1 - Figure 4 The specific method for step S3.2 is as follows: S3.21. Preset the correspondence between channel voltage state and display mode. When the left turn direction indicator signal channel has voltage, it corresponds to the left turn direction indicator display mode. When the channel has no voltage and the full screen signal channel has voltage, it corresponds to the full screen display mode. When both channels have no voltage, it corresponds to the off mode. This serves as the basis for the state response from voltage state to display mode. S3.22. Based on the channel voltage status acquisition results and matching the above correspondence, the current voltage status combination is converted into a display mode control command and output to the display drive circuit. The display drive circuit drives the composite signal lamp group to light up the corresponding pattern or perform an extinguishing operation according to the command, realizing the status response from input status to display output.

[0048] In this embodiment: S3.21 establishes a predefined correspondence between channel voltage states and display modes, creating clear mapping rules between three display modes—left turn direction indication, full screen, and off—and the two-channel voltage combinations. This predefined mechanism creates a fixed and unique correspondence path between voltage input combinations and display outputs. The display drive circuit can directly call the mapping results without performing complex dynamic logic calculations, simplifying the execution flow of terminal display control. Simultaneously, the fixed correspondence ensures the determinism and consistency of display mode switching under different operating conditions, avoiding display anomalies caused by fuzzy judgment rules or ambiguous state transitions, and providing a reliable logical basis for the stable output of traffic signals.

[0049] S3.22, based on the channel voltage status acquisition results and matching them with a preset correspondence, converts the current voltage combination into a display mode control command and outputs it to the display drive circuit. The display drive circuit then drives the composite signal light group to perform the lighting or extinguishing operation according to the command. This conversion mechanism achieves a direct response from electrical input to optical output, reduces intermediate logic judgment steps, and improves the response speed and execution efficiency of display mode switching. By ensuring a one-to-one correspondence between voltage status and display commands, it ensures that the light group can output a correct and unique display pattern under different channel input combinations, avoiding display conflicts when two channels are effective simultaneously, and guaranteeing the clear and distinguishable display of traffic signals.

[0050] This step pre-defines the mapping rules between voltage status and display mode within the composite traffic light group, enabling terminal-based response. This solution, through a pre-defined fixed mapping relationship, allows the traffic lights to autonomously convert voltage status to display commands locally. The controller only needs to independently output the voltage of each channel without coordinated switching, reducing the controller's functional burden, ensuring the immediacy of display status transitions during phase switching, avoiding display conflicts, and improving the reliability of traffic signal control.

[0051] Example 7: Please refer to Figure 1 - Figure 4 In step S4, the adaptive display switching method is as follows: S4.1 Display drive circuit receives priority judgment result. When there is effective voltage input in the left turn direction indicator signal channel, drive the composite signal lamp group to light up the left turn direction indicator pattern of that lamp color, and at the same time turn off the drive circuit corresponding to the full screen signal channel so that the input state of the full screen channel does not participate in the current lamp color display judgment. S4.2 When there is no effective voltage input to the left turn direction indicator signal channel and there is an effective voltage input to the full screen signal channel, the display drive circuit drives the composite signal lamp group to light up the full screen pattern of that light color. When there is no effective voltage input to either channel, the light color is controlled to turn off, forming a display output corresponding to the channel input state.

[0052] In this embodiment: Step S4.1 receives the priority determination result through the display driving circuit. When there is a valid voltage input in the left turn direction indicator signal channel, the composite signal light group is driven to illuminate the left turn direction indicator pattern of that light color. At the same time, the driving circuit corresponding to the full-screen signal channel is actively turned off, blocking the influence of the full-screen channel voltage input on the current light color display determination. This achieves hardware priority arbitration, ensuring that only one display mode is validly output under the same light color. This mechanism avoids pattern superposition and display conflicts caused by simultaneous driving of dual channels, providing traffic participants with clear and unambiguous visual indications and improving the reliability and safety of signal display.

[0053] Step S4.2, through the display driving circuit, provides a complete response to all channel input state combinations. When there is no effective voltage input to the left turn direction indicator signal channel and an effective voltage input to the full-screen signal channel, the composite signal light group is driven to illuminate the full-screen pattern of that light color. When there is no effective voltage input to either channel, the light color is controlled to turn off, achieving full coverage of display output that strictly corresponds to the channel input state. This setting ensures the continuity and determinism of the display state during phase switching, eliminates state vacancy or abnormal holding caused by missing display logic, and provides complete terminal execution guarantee for the standardized output of traffic signals.

[0054] Compared to existing technologies where the signal controller needs to centrally determine the output status of each channel and execute complex multi-channel coordinated switching timing, this step integrates the display mode switching execution within the composite signal light group, achieving terminal adaptive display control through hardware-level priority arbitration. Existing solutions, if the timing is not properly coordinated during switching, are prone to failure states such as simultaneous conduction of two channels leading to pattern superposition or abnormal light group shutdown, causing traffic participants to misread and confuse the signal status. This solution, through the active shutdown of non-priority channels and the complete response to all input states via the drive circuit, allows the controller to independently output the voltage of each channel without precisely coordinating the switching timing. This significantly reduces the performance requirements and upgrade costs of the controller, while ensuring that the light group outputs a unique and clear display status under various channel input combinations, avoiding the risk of misreading caused by pattern superposition or signal abnormalities, and improving the stability and safety of traffic signal displays.

[0055] Example 8: Please refer to Figure 1 - Figure 4 The specific method for step S4.1 is as follows: S4.11. Based on the state determination result, when there is an effective voltage input in the left turn direction indicator signal channel, the display drive circuit drives the left turn direction indicator light-emitting unit of the corresponding light color inside the composite signal lamp group to light up, outputs the left turn direction indicator pattern of that light color, and maintains the display state until the channel voltage state changes. S4.12 During the output of the left turn direction indicator pattern, the drive circuit corresponding to the full-screen signal channel is simultaneously shut off to block the influence of the full-screen channel voltage input on the current light color display determination, ensuring that the high-priority display mode exclusively occupies the current light color output port resources, and avoiding abnormal pattern superposition display caused by simultaneous driving of dual channels.

[0056] In this embodiment: S4.11, based on the state determination result, the display driving circuit drives the corresponding left-turn direction indicator light-emitting unit inside the composite signal light group to light up and maintain this display state, thus achieving stable output of the left-turn direction indicator pattern during the effective period of the channel voltage. This process ensures that the high-priority display mode receives continuous and reliable electrical drive, ensuring that traffic participants receive a clear and uninterrupted direction indicator signal during the left-turn phase, avoiding signal recognition confusion caused by display state fluctuations or drive instability.

[0057] S4.12 achieves electrical isolation of non-priority channels by simultaneously shutting down the drive circuit corresponding to the full-screen signal channel during the output of the left turn direction indicator pattern. This mechanism blocks the interference of the full-screen channel voltage input on the current light color display determination, ensuring that only one display mode is effectively output under a single light color. This avoids pattern superposition and display abnormalities caused by simultaneous driving of dual channels, maintaining the clarity and uniqueness of traffic signal displays.

[0058] Compared to existing technologies where the signal controller needs to centrally determine the output status of each channel and execute multi-channel coordinated switching timing, this approach integrates priority arbitration and non-priority shutdown functions within the composite signal light group. Existing solutions rely on centralized timing management by the controller; improper switching coordination can easily lead to simultaneous conduction of two channels or abnormal extinguishing of the light group, causing misreading and confusion of the signal status among traffic participants. This solution directly shuts off non-priority drive paths through a hardware loop, eliminating the need for the controller to precisely coordinate the on / off timing of each channel. It only needs to independently output channel voltages according to traditional timing methods to complete phase switching, significantly reducing the requirements on controller performance and coordinated control logic. Simultaneously, it ensures that the light group outputs a unique and clear display pattern under various input states, avoiding the risk of misreading caused by pattern superposition or signal anomalies, and improving the stability and safety of traffic signal displays.

[0059] Example 9: Please refer to Figure 1 - Figure 4 The specific method for step S4.2 is as follows: S4.21 When there is no effective voltage input to the left turn direction indicator signal channel and there is an effective voltage input to the full screen signal channel, the display drive circuit drives the full screen light-emitting unit of the corresponding light color inside the composite signal light group to light up, outputs the full screen pattern of that light color, and maintains this display state until the channel voltage state changes. S4.22 When there is no effective voltage input in both the left turn direction indicator signal channel and the full screen signal channel, the display drive circuit shuts off all drive circuits for that light color, controls the corresponding light color of the composite signal light group to turn off, so that the light group has no display output under that light color, forming an extinguishing response corresponding to the dual-channel no input state, and reserving state change conditions for voltage re-input during subsequent phase switching.

[0060] In this embodiment: S4.21, by driving the corresponding color full-screen light-emitting unit to light up when there is no voltage in the left turn direction indicator signal channel and there is voltage in the full-screen signal channel through the display driving circuit, a stable output of the full-screen pattern is achieved during the effective period of the channel. This process enables the composite signal light group to automatically switch to the full-screen display mode after the left turn direction indicator phase ends, ensuring that the light group continuously outputs standardized traffic indication signals during the full-screen phase, avoiding blank signal display caused by delayed display mode switching or drive interruption, and providing a reliable terminal display guarantee for the normal execution of the multi-phase timing scheme.

[0061] S4.22 shuts off all drive circuits for a given LED color when there is no valid voltage input on either channel, achieving an extinguishing response corresponding to the no-input state. This mechanism ensures that the composite signal LED group accurately performs the extinguishing operation during LED color switching intervals, avoiding signal display errors caused by unexpected lighting. Simultaneously, it reserves clear state change conditions for subsequent voltage re-input during phase switching, enabling the LED group to accurately respond and switch to the target display mode when a new voltage input arrives, guaranteeing the accuracy and continuity of display state transitions during phase changes.

[0062] Compared to existing technologies where the signal controller needs to centrally determine the output status of each channel and execute complex multi-channel coordinated switching sequences, this approach integrates full-screen display and off-state control within the composite signal light group, enabling autonomous terminal execution of display mode switching. Existing solutions rely on the controller precisely coordinating the on / off timing of each channel; improper timing can easily lead to abnormal off-state or unexpected lighting of the lights, causing traffic participants to misinterpret the signal status. This solution, through the automatic response of the drive circuit to valid inputs from full-screen channels and the active shutdown of dual-channel states without input, allows the controller to independently output the voltage of each channel according to traditional timing methods, eliminating the need for complex multi-channel coordinated switching sequences. This significantly reduces the performance requirements and upgrade costs of the controller while ensuring that the light group outputs display patterns that strictly correspond to the voltage status under various input conditions, avoiding the risk of misinterpretation caused by signal anomalies.

[0063] Example 10: Please refer to Figure 1 - Figure 4 In step S5, the specific method for switching the phase mode is as follows: S5.1 The signal controller independently controls the voltage output of the left turn direction indicator and the full screen two channels according to the traffic control requirements of the intersection. By changing the presence or absence of the voltage of the two channels, the phase increase or decrease of the full screen and the left turn direction indicator can be switched. The voltage output status of each channel is controlled independently, without the need to execute the multi-channel coordinated switching sequence. S5.2 During phase switching, the composite signal light group detects the voltage state changes of the two channels in real time according to the built-in priority judgment rules and automatically completes the display pattern conversion. During the channel voltage switching, at least one channel maintains effective display output, so that the light group maintains effective display state throughout the phase change process and avoids traffic participants misreading the signal due to signal extinguishing.

[0064] In this embodiment: S5.1, the signal controller independently controls the voltage output of the left-turn direction indicator and the full-screen indicator channels according to the traffic control needs of the intersection at different times. By changing the voltage of the two channels, the phase increase or decrease between the full-screen and left-turn direction indicators is achieved. This allows the signal controller to independently control the voltage output state of each channel according to the traditional timing scheme, without performing complex multi-channel coordinated switching timing control. This method significantly reduces the requirements for upgrading the existing signal controller's hardware and software, improves compatibility with existing traditional equipment, and allows traffic management personnel to flexibly configure the timing scheme like controlling independent light groups, freely increasing or decreasing the phase during different traffic flow periods. This meets the actual needs of flexible intelligent traffic management and avoids display abnormalities caused by improper timing coordination of the controller.

[0065] S5.2, through its built-in priority discrimination rules, automatically detects changes in the voltage status of the two channels during phase switching of the composite signal light group and automatically completes the display pattern conversion. It maintains effective display output of at least one channel throughout the phase transition, ensuring the light group remains in an effective display state throughout the entire phase change process. This mechanism prevents all lights from going out during channel switching, completely eliminating the safety hazard of traffic participants misinterpreting phase switching as a signal light malfunction. The composite signal light group autonomously completes instantaneous switching of the display mode based on the input voltage, achieving adaptive and seamless conversion. This improves the reliability and safety of traffic signal control and provides a stable terminal display guarantee for flexible phase management at urban road intersections at different times.

[0066] Compared to existing technologies where signal controllers need to centrally determine the output status of each channel and execute complex multi-channel collaborative switching sequences, or where independent left-turn lights are directly shut down when the phase decreases, leading to misreadings, this approach achieves low-cost and reliable phase switching through a collaborative mechanism of independent channel control by the controller and automatic priority switching built into the light groups. Existing solutions require controllers with complex logic judgments and multi-channel collaborative control capabilities, resulting in high upgrade costs for existing equipment. Furthermore, improper switching sequences can easily lead to light group extinguishing or display conflicts. This solution allows the signal controller to independently output the voltage of each channel, while the display mode switching is automatically completed by the composite signal light group according to built-in rules. This significantly reduces the performance requirements of the controller and the system deployment cost. Simultaneously, the light groups maintain effective display output throughout the switching process, avoiding the risk of misreading caused by signal extinguishing. This achieves safe, reliable, flexible, and efficient phase increase / decrease switching, providing economical and feasible technical support for dynamic and adaptive signal control in intelligent transportation.

[0067] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units. The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the description and drawings of this application, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

[0068] The specific embodiments of the invention have been described in detail above, but they are only examples, and this application is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the invention are also within the scope of this application. Therefore, all equivalent changes, modifications, and improvements made without departing from the spirit and principles of this application should be covered within the scope of this application.

Claims

1. A composite signal light adaptive display method based on signal channel priority discrimination, characterized in that: The specific steps are as follows: S1. Dual-channel architecture configuration: The composite signal light group supports left turn direction indication and full-screen mode, and each light color has an independent terminal; the signal controller outputs signals through the left turn direction indication and full-screen channels, and its full-screen terminal is connected in parallel with the full-screen light group to the full-screen channel. S2, Priority Rule Preset: The lamp group has a built-in priority judgment and driving circuit to establish a rule that the left arrow signal channel takes precedence over the full screen channel; S3. Input status determination: Priority determination and drive circuit detection of two-channel voltage to identify left turn direction, full screen or no signal status; S4. Adaptive display switching: When there is voltage in the left arrow signal channel, the light group displays a left turn direction indicator pattern; when there is no voltage in this channel and the full-screen channel has voltage, the full-screen pattern is displayed; when there is no voltage in both channels, the light group is off. S5, Phase Mode Switching: The signal controller independently controls the voltage of the two channels to achieve phase switching between full screen and left turn direction indication; during switching, the light group automatically changes the display status according to priority rules.

2. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 1, characterized in that, In step S1, the specific configuration method for the dual-channel architecture is as follows: S1.1 The composite signal light group shall have at least two display modes: left turn direction indication and full screen. Each of the red, yellow and green lights shall be provided with an independent physical terminal. Each light color terminal shall be connected to the left turn direction indication and full screen drive circuit inside the light group, forming a hardware architecture that supports independent driving of the two patterns. S1.2 The output terminals of the traffic signal controller are divided into a first signal channel, a second signal channel, a third signal channel, and a common neutral line. The first signal channel outputs red left arrow, yellow left arrow, and green left arrow drive signals. The second signal channel outputs red full screen, yellow full screen, and green full screen drive signals. The neutral line serves as the common circuit terminal for each light group. The red left arrow, yellow left arrow, and green left arrow terminals of the composite signal light group are connected one-to-one with the corresponding output terminals of the first signal channel. The red full screen, yellow full screen, and green full screen terminals of the composite signal light group are connected with the corresponding output terminals of the second signal channel. The red full screen, yellow full screen, and green full screen terminals of the full screen signal light group are connected with the corresponding output terminals of the second signal channel. The full screen terminals of the composite signal light group are connected in parallel with the terminals of the full screen signal light group and then connected to the corresponding output terminals of the second signal channel, so that the full screen display status of the two light groups is controlled by the same channel. The neutral line terminals of both the composite signal light group and the full screen signal light group are connected to the common neutral line, forming a complete AC drive circuit.

3. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 2, characterized in that, In step S2, the priority rules are preset in the following way: S2.

1. A priority discrimination and driving circuit is configured for each color of the composite signal light group. The circuit collects the voltage signal input from the signal controller in real time, identifies and compares the input status of the two signal channels under the same color, and drives the corresponding display pattern to light up and turns off the non-priority circuit according to the preset priority rules. S2.

2. A preset rule is set to prioritize the left turn direction indicator signal channel over the full-screen signal channel. This rule is then built into the priority judgment and driving circuit, enabling the composite signal light group to autonomously determine and switch display modes based on the input voltage. The signal controller only needs to independently control the voltage output of each channel.

4. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 3, characterized in that, In step S3, the specific method for determining the input state is as follows: S3.1 The drive circuit detects the voltage signal output by the signal controller in real time, and combines and judges the voltage status of the left turn direction indicator signal channel and the full screen signal channel under the same light color to determine whether the current input signal is a left turn direction signal, a full screen signal or no signal, and outputs the status judgment result. S3.

2. Based on the state determination results, establish the mapping relationship between channel input and display mode. When the left turn direction indicator signal channel has voltage, it is mapped to a left turn direction signal. When the channel has no voltage and the full screen signal channel has voltage, it is mapped to a full screen signal. When both channels have no voltage, it is mapped to a no signal state. The mapping results are then transmitted to the display driver circuit.

5. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 4, characterized in that, The specific method for step S3.1 is as follows: S3.11 The drive circuit detects the voltage signals output by each channel of the signal controller in real time, and synchronously collects the voltage status of the left turn direction indicator signal channel and the full screen signal channel under the same light color. It identifies the current electrical input status of the two channels and forms the channel voltage status collection result as the basis for combination judgment. S3.

12. Based on the channel voltage status acquisition results, perform combined judgment. According to the voltage status combination of the left turn direction indicator signal channel and the full screen signal channel under the same light color, determine whether the current input signal is a left turn direction signal, a full screen signal, or no signal. Output the channel input status classification judgment result and transmit the result to the display driver circuit.

6. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 5, characterized in that, The specific method for step S3.2 is as follows: S3.

21. Preset the correspondence between channel voltage state and display mode. When the left turn direction indicator signal channel has voltage, it corresponds to the left turn direction indicator display mode. When the channel has no voltage and the full screen signal channel has voltage, it corresponds to the full screen display mode. When both channels have no voltage, it corresponds to the off mode. This serves as the basis for the state response from voltage state to display mode. S3.

22. Based on the channel voltage status acquisition results and matching the above correspondence, the current voltage status combination is converted into a display mode control command and output to the display drive circuit. The display drive circuit drives the composite signal lamp group to light up the corresponding pattern or perform an extinguishing operation according to the command, realizing the status response from input status to display output.

7. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 6, characterized in that, In step S4, the adaptive display switching method is as follows: S4.1 Display drive circuit receives priority judgment result. When there is effective voltage input in the left turn direction indicator signal channel, drive the composite signal lamp group to light up the left turn direction indicator pattern of that lamp color, and at the same time turn off the drive circuit corresponding to the full screen signal channel so that the input state of the full screen channel does not participate in the current lamp color display judgment. S4.2 When there is no effective voltage input to the left turn direction indicator signal channel and there is an effective voltage input to the full screen signal channel, the display drive circuit drives the composite signal lamp group to light up the full screen pattern of that light color. When there is no effective voltage input to either channel, the light color is controlled to turn off, forming a display output corresponding to the channel input state.

8. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 7, characterized in that, The specific method for step S4.1 is as follows: S4.

11. Based on the state determination result, when there is an effective voltage input in the left turn direction indicator signal channel, the display drive circuit drives the left turn direction indicator light-emitting unit of the corresponding light color inside the composite signal lamp group to light up, outputs the left turn direction indicator pattern of that light color, and maintains the display state until the channel voltage state changes. S4.12 During the output of the left turn direction indicator pattern, the drive circuit corresponding to the full-screen signal channel is simultaneously shut off to block the influence of the full-screen channel voltage input on the current light color display determination, ensuring that the high-priority display mode exclusively occupies the current light color output port resources, and avoiding abnormal pattern superposition display caused by simultaneous driving of dual channels.

9. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 8, characterized in that, The specific method for step S4.2 is as follows: S4.21 When there is no effective voltage input to the left turn direction indicator signal channel and there is an effective voltage input to the full screen signal channel, the display drive circuit drives the full screen light-emitting unit of the corresponding light color inside the composite signal light group to light up, outputs the full screen pattern of that light color, and maintains this display state until the channel voltage state changes. S4.22 When there is no effective voltage input in both the left turn direction indicator signal channel and the full screen signal channel, the display drive circuit shuts off all drive circuits for that light color, controls the corresponding light color of the composite signal light group to turn off, so that the light group has no display output under that light color, forming an extinguishing response corresponding to the dual-channel no input state, and reserving state change conditions for voltage re-input during subsequent phase switching.

10. The adaptive display method for composite signal lights based on signal channel priority discrimination according to claim 9, characterized in that, In step S5, the specific method for switching the phase mode is as follows: S5.1 The signal controller independently controls the voltage output of the left turn direction indicator and the full screen two channels according to the traffic control requirements of the intersection. By changing the presence or absence of the voltage of the two channels, the phase increase or decrease of the full screen and the left turn direction indicator can be switched. The voltage output status of each channel is controlled independently, without the need to execute the multi-channel coordinated switching sequence. S5.2 During phase switching, the composite signal light group detects the voltage state changes of the two channels in real time according to the built-in priority judgment rules and automatically completes the display pattern conversion. During the channel voltage switching, at least one channel maintains effective display output, so that the light group maintains effective display state throughout the phase change process and avoids traffic participants misreading the signal due to signal extinguishing.

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