A differential vga signal decoding display device

Abstract

This invention discloses a differential VGA signal decoding and display device, relating to the display field. It includes a signal input module, an ESD protection module, a differential receiving module, a synchronization separation module, an image decoding driver module, a display module, an audio processing module, and a control module. These modules are interconnected and work together to decode, process, and display differential VGA signals. This differential VGA signal decoding and display device solves the problems of short transmission distance, weak anti-interference capability, limited resolution, and high power consumption associated with traditional VGA interfaces. It also achieves full compatibility with traditional VGA devices, integrating audio processing, local playback, intelligent signal enhancement, and remote monitoring and management functions. It achieves reliable conversion from analog to differential signals, supports high-definition display, and has a transmission distance of up to 50 meters, while maintaining full compatibility with traditional VGA devices. This technology is particularly suitable for professional fields such as industrial automation and medical imaging, meeting the diverse display and intelligent operation and maintenance needs of professional scenarios.

Description

Technical Field

[0001] This invention relates to the field of display technology, specifically to a differential VGA signal decoding display device. Background Technology

[0002] The VGA interface, as a traditional analog display interface, is widely used in industrial control, medical equipment, rail transportation, and other fields. However, the traditional VGA interface uses direct analog signal transmission, which has many technical shortcomings: 1. Limited transmission distance: Analog signals attenuate quickly during transmission, and the transmission distance is usually no more than 15 meters, which cannot meet the needs of large-scale industrial scenarios, long-distance monitoring and other scenarios. 2. Weak anti-interference ability: Analog signals are susceptible to electromagnetic interference and common-mode noise, which can cause problems such as ghosting, distortion, and snowflakes in the picture. This is especially true in complex electromagnetic environments such as industrial workshops and rail transit, which can affect the display effect. 3. Limited resolution improvement: The signal bandwidth of the traditional VGA interface is insufficient, making it difficult to support full HD and higher resolutions, and unable to meet the needs of scenarios with high requirements for image detail, such as medical imaging and high-precision industrial monitoring. 4. High power consumption: Traditional VGA display devices have redundant circuit designs, low power conversion efficiency, and high power consumption during long-term operation, which does not meet energy-saving requirements; 5. Compatibility versus cost conflict: While existing digital interfaces such as HDMI and DP can improve transmission distance and anti-interference capabilities, they are not compatible with a large number of existing traditional VGA devices, and the cost of replacing digital interface devices is high, making it difficult to promote them on a large scale.

[0003] Therefore, developing a differential VGA signal decoding and display device that combines long-distance transmission, strong anti-interference capability, high-resolution support, low power consumption, and compatibility with traditional VGA devices has become the key to overcoming the shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a differential VGA signal decoding display device to solve the problems mentioned in the background art, such as limited transmission distance, susceptibility to electromagnetic interference leading to image distortion, limited resolution improvement, high power consumption, incompatibility with traditional VGA devices, and high cost of existing display devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a differential VGA signal decoding and display device, comprising a signal input module, an ESD protection module, a differential receiving module, a synchronization separation module, an image decoding driving module, a display module, an audio processing module, and a control module, wherein each module is interconnected and works together to decode, process, and display differential VGA signals; The signal input module includes an RGB differential signal port for receiving R+ / R-, G+ / G-, and B+ / B- differential signals; an IR / KEY control port for receiving infrared remote control or button control commands; an audio input port for receiving A+ / A- differential audio signals; a USB input port for connecting to a USB storage medium to read audio and video files; and an industrial equipment linkage port for connecting to PLCs, sensors, and other industrial control equipment to receive equipment operating status signals, achieving comprehensive adaptation and reception of multiple signal types and industrial scenarios. The ESD protection module is located between the signal input port and the subsequent processing module. It is used for electrostatic protection and has the functions of protection status monitoring and alarm. It can not only filter electrostatic interference in the input signal, but also detect the electrostatic interference intensity and the working status of the protection circuit in real time. When the interference exceeds the standard or the protection circuit is abnormal, it immediately sends an alarm signal to the control module. At the same time, it links the differential receiving module to temporarily reduce the signal transmission gain to avoid electrostatic breakdown of core components and provide active protection for subsequent modules. The differential receiving module receives RGB differential signals, restores them to single-ended RGB signals, and has adaptive noise suppression capabilities. After receiving the ESD-protected RGB differential signals, it identifies the intensity of environmental electromagnetic interference in real time through a built-in interference detection unit, dynamically adjusts the noise suppression threshold, reduces the suppression intensity to protect signal details when the interference is weak, and increases the suppression intensity to shield noise when the interference is strong, accurately restores the single-ended RGB signals, provides a low-noise, high-fidelity basic signal for image decoding, and further enhances the anti-interference capability of long-distance transmission. The synchronization separation module separates the line and field synchronization signals from the composite signal and has a timing deviation compensation function. The image decoding driver module receives video-related signals, optimizes and drives the display module, and has a dynamic resolution adaptation function. The display module has a dynamic image quality enhancement function to adapt to the display needs of different professional scenarios; The audio processing module decodes, amplifies, and outputs audio signals, and also has an audio-video synchronization delay calibration function. The control module receives control commands and industrial equipment signals, adjusts system operating parameters, and has intelligent linkage functions.

[0006] In this embodiment, the USB input port of the signal input module works in conjunction with the image decoding driver module. After the image decoding driver module parses the audio and video files in the USB storage medium, it synchronously calls the display module to present the video, the audio processing module to output the audio, and the linkage control module to record the playback progress and parameter settings, so as to realize the synchronous playback of multiple media files.

[0007] In this embodiment, the differential receiving module adopts a multi-channel differential-to-single-ended receiving structure, working in conjunction with the ESD protection module and the image decoding driver module. It first receives the RGB differential signal through electrostatic protection, and then uses adaptive common-mode noise suppression technology to dynamically adjust the noise suppression threshold according to the intensity of environmental interference, accurately restoring the single-ended RGB signal and providing a low-noise, high-fidelity basic signal for the image decoding driver module.

[0008] In this embodiment, the synchronization separation module includes an operational amplifier unit, a synchronization extraction circuit, and a synchronization signal fault tolerance calibration unit, which work in conjunction with the differential receiving module and the image decoding driving module. The operational amplifier unit optimizes the amplitude of the composite signal and filters interference, the synchronization extraction circuit separates the horizontal and vertical synchronization signals, and the fault tolerance calibration unit automatically compensates for timing deviations to ensure that the synchronization signal and the image signal are accurately matched in timing, thus avoiding screen tearing and misalignment.

[0009] In this embodiment, the image decoding driving module integrates a signal decoding unit, a display driving unit, an automatic tuning unit, and a dynamic resolution intelligent adaptation unit, and works in conjunction with the differential receiving module, the synchronization separation module, and the display module. The automatic tuning unit optimizes the signal through coordinated operations such as phase calibration and positioning adjustment. The dynamic resolution intelligent adaptation unit automatically identifies the input signal resolution, standard definition to 4K, and adapts and switches the display driving mode. At the same time, it links with the image quality dynamic enhancement unit of the display module to optimize the display parameters for different scenarios.

[0010] In this embodiment, the ESD protection module works in conjunction with the control module and the differential receiving module to monitor the electrostatic interference intensity and its own operating status in real time. When the interference exceeds the standard or is abnormal, it sends an alarm signal to the control module. At the same time, it links the differential receiving module to reduce the signal transmission gain to avoid electrostatic breakdown of core components. The control module records the protection status log.

[0011] In this embodiment, the image quality dynamic enhancement unit of the display module works in conjunction with the control module to allow users to preset image quality parameter templates for different professional scenarios through the IR / KEY control port or the industrial equipment linkage port. After the image decoding drive module identifies the signal scene type, it automatically calls the corresponding template. The template parameters can be modified and stored in real time through the control module, adapting to the personalized image quality requirements of multiple scenarios such as medical imaging, rail transit monitoring, and industrial control interfaces. It adopts a liquid crystal display panel, supports single / dual link multi-digit signal input, full HD (1920x1080) @60Hz display, 3D passive panel display, and signal jitter optimization output.

[0012] In this embodiment, the audio processing module includes an audio decoding unit, a power amplification unit, and an audio delay intelligent calibration unit, which work in conjunction with the image decoding driving module. The audio delay intelligent calibration unit detects the video signal transmission delay in real time and automatically adjusts the audio output delay to ensure that the audio and video synchronization error is less than 10ms, thereby achieving accurate audio and video synchronization output.

[0013] In this embodiment, the control module includes a storage unit, an instruction processing unit, and an industrial scene intelligent linkage control unit, which works in conjunction with the display module, audio processing module, ESD protection module, and external industrial equipment. The industrial scene intelligent linkage control unit receives the operating status signal of the industrial equipment, automatically adjusts the display parameters and audio output status, and triggers scene-based alarms. At the same time, it receives the alarm signal from the ESD protection module, feeds back the fault information to the industrial control system, and forms a closed-loop control.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This differential VGA signal decoding and display device solves the problems of short transmission distance, weak anti-interference ability, limited resolution, and high power consumption of traditional VGA interfaces. At the same time, it achieves full compatibility with traditional VGA devices, integrates audio processing, local playback, intelligent signal enhancement, and remote monitoring and management functions, realizes reliable conversion of analog signals to differential signals, supports high-definition display, and has a transmission distance of up to 50 meters. It also maintains full compatibility with traditional VGA devices. This technology is particularly suitable for professional fields such as industrial automation and medical imaging, meeting the diversified display and intelligent operation and maintenance needs of professional scenarios.

[0015] 1. Significantly improved transmission performance and anti-interference capability: Relying on the adaptive common-mode noise suppression technology of the differential receiver module and the synchronous signal fault-tolerant calibration function of the synchronous separation module, the signal transmission distance is increased from 15 meters in traditional VGA to 50 meters, meeting the needs of long-distance applications; By dynamically adjusting the noise suppression threshold and automatically compensating for timing deviations, the system's anti-electromagnetic interference capability is improved, and the image distortion rate is reduced. Even in industrial environments with strong interference and complex electromagnetic environments in rail transit, the system can still maintain signal stability and clear image quality, solving the core problem of analog signal transmission being susceptible to interference and distortion.

[0016] 2. Resolution Adaptation Range Achieves Full Scene Coverage: The dynamic resolution intelligent adaptation unit of the image decoding driver module breaks through the resolution limitations of traditional solutions. It can automatically identify input signals of all specifications from standard definition to 4K, flexibly switch display driving modes, perfectly compatible with low-resolution signals from existing traditional VGA devices without the need for additional conversion modules, and efficiently decode high-definition and 4K signals to drive the display module output. At the same time, in conjunction with the signal jitter optimization function of the display module, it achieves high-quality display of full HD (1920x1080)@60Hz and 4K adaptation, adapting to professional scenarios with stringent resolution requirements such as medical imaging and high-definition monitoring.

[0017] 3. Dual optimization of professional scene adaptability and audio-visual synchronization accuracy: The display module's dynamic image enhancement unit can accurately adjust display parameters according to signal type. In medical imaging scenarios, it enhances grayscale differentiation, making lesion details clearer; in rail transit monitoring scenarios, it improves dynamic image sharpness and captures fast-moving targets; in industrial control scenarios, it optimizes color saturation to ensure the recognizability of data charts; at the same time, the audio processing module's intelligent audio delay calibration unit and image decoding driver module work together in real time to dynamically compensate for transmission delay, reduce audio-visual synchronization errors, solve the problem of audio-visual asynchrony in long-distance transmission or high-load scenarios, and improve the user experience in professional scenarios.

[0018] 4. Significantly Enhanced System Reliability and Ease of Maintenance: The ESD protection module's real-time monitoring and intelligent alarm unit not only actively filters electrostatic interference but also detects interference intensity and the operating status of the protection circuit in real time. In case of anomalies, it immediately triggers an alarm and adjusts the signal transmission gain accordingly to prevent damage to core components. The control module's log storage function comprehensively records protection status, operating parameters, and fault information, providing maintenance personnel with accurate troubleshooting information and significantly reducing troubleshooting time and maintenance costs. Furthermore, the intelligent linkage function for industrial scenarios enables the system to deeply collaborate with PLCs, sensors, and other industrial equipment, automatically triggering alarm displays and amplifying prompts based on equipment operating status, thus improving the safety and response efficiency of industrial control scenarios. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the differential VGA signal decoding and display device module of the present invention; Figure 2 This is a schematic diagram of the overall logic block of the system of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a differential VGA signal decoding and display device, the core of which consists of an RGB differential signal port for receiving R+ / R-, G+ / G-, and B+ / B- differential signals; an IR / KEY control port for receiving infrared remote control or button control commands; an audio input port for receiving A+ / A- differential audio signals; a USB input port for connecting to a USB storage medium to read audio and video files; and an industrial equipment linkage port for connecting to PLCs, sensors, and other industrial control equipment to receive equipment operating status signals, achieving comprehensive adaptation and reception of multiple signal types and industrial scenarios; an ESD protection module for electrostatic discharge protection with protection status monitoring and alarm functions, which not only filters electrostatic interference in the input signal but also detects the intensity of electrostatic interference and the working status of the protection circuit in real time. When the interference exceeds the standard or the protection circuit is abnormal, it immediately sends an alarm signal to the control module and simultaneously links the differential receiving module to temporarily reduce the signal transmission gain to prevent electrostatic discharge from damaging the core components, providing active protection for subsequent modules; receiving RGB differential signals, restoring them to single-ended RGB signals with adaptive noise suppression capabilities; and receiving the ESD-protected RGB differential signals through built-in interference detection. The unit identifies the intensity of environmental electromagnetic interference in real time and dynamically adjusts the noise suppression threshold. When interference is weak, the suppression intensity is reduced to protect signal details, while when interference is strong, the suppression intensity is increased to shield noise, accurately restoring single-ended RGB signals. This provides a low-noise, high-fidelity base signal for image decoding, further enhancing the anti-interference capability for long-distance transmission. It separates horizontal and vertical synchronization signals from composite signals and has timing deviation compensation functionality. It receives video-related signals, optimizes them, and drives the display module, with dynamic resolution adaptation. It features dynamic image quality enhancement to adapt to different professional display scenarios. It decodes, amplifies, and outputs audio signals, with audio-video synchronization delay calibration. It receives control commands and industrial equipment signals, adjusts system operating parameters, and has intelligent linkage functionality. It achieves full compatibility with traditional VGA devices, integrating audio processing, local playback, intelligent signal enhancement, and remote monitoring and management functions. It achieves reliable conversion from analog to differential signals, supports high-definition display, and has a transmission distance of up to 50 meters, while maintaining full compatibility with traditional VGA devices. This technology is particularly suitable for professional fields such as industrial automation and medical imaging, meeting the diversified display and intelligent operation and maintenance needs of professional scenarios.

[0022] Example 1: To better understand the above technical solution, the following will provide a detailed description of the technical solution in conjunction with the accompanying drawings and specific implementation methods. (Refer to...) Figure 1 - Figure 2 As shown, Figure 1 This is a schematic diagram of a differential VGA signal decoding and display device system. (Differential VGA signal decoding and display device) Figure 2 This is the overall logical block diagram of the system, including the following modules: The signal input module includes an RGB differential signal port for receiving R+ / R-, G+ / G-, and B+ / B- differential signals; an IR / KEY control port for receiving infrared remote control or button control commands; an audio input port for receiving A+ / A- differential audio signals; a USB input port for connecting to a USB storage medium to read audio and video files; and an industrial equipment linkage port for connecting to PLCs, sensors, and other industrial control equipment to receive equipment operating status signals, achieving comprehensive adaptation and reception of multiple signal types and industrial scenarios. Specifically, the USB input port of the signal input module works in conjunction with the image decoding driver module. After the image decoding driver module parses the audio and video files in the USB storage medium, it synchronously calls the display module to present the video, the audio processing module to output the audio, and the linkage control module to record the playback progress and parameter settings, so as to realize the synchronous playback of multiple media files. It should be further explained that the functions, operating logic, and coordination mechanisms of each port are as follows: 1. RGB Differential Signal Port: Specifically designed to receive R+ / R-, G+ / G-, and B+ / B- three-channel differential video signals transmitted from external VGA devices via twisted-pair cable. The port has a built-in differential signal matching circuit to ensure impedance matching with the external transmission link, with an impedance adaptation range of 50-100Ω, reducing signal reflection loss. After the signal is input, the port monitors the signal amplitude and transmission stability in real time, delivering the effective differential video signal to the ESD protection module without distortion, providing the original video data source for subsequent signal processing.

[0023] II. IR / KEY Control Port: Includes an infrared receiver sub-port and a physical button sub-port. The infrared receiver sub-port can recognize infrared remote control signals with a 38kHz carrier frequency and convert remote control commands into digital pulse signals. The physical button sub-port supports user manual input of commands such as brightness adjustment, volume control, and mode switching, generating corresponding trigger signals. This port converts infrared remote control signals or button trigger signals into standard digital control signals, which are directly sent to the command processing unit of the control module to provide real-time manual control input for the system.

[0024] 3. Audio Input Port: Adopting a differential transmission design, it is specifically designed to receive A+ / A- differential audio signals output from external devices. The port has an audio signal amplitude detection function and can adapt to differential audio signal inputs with different amplitude ranges of 0.1-2Vpp. After the signal is input, it is initially stabilized by the port's built-in buffer circuit before being sent to the ESD protection module for electrostatic protection, ensuring the integrity of audio signal transmission and providing the original audio data source for audio and video synchronous output. IV. USB Input Port: Supports USB 2.0 / 3.0 protocols for connecting USB storage media such as flash drives and external hard drives. The port has a built-in USB host controller that automatically identifies the file system of the storage media, such as FAT32 and NTFS. During operation, the port establishes a communication link with the image decoding driver module via the data bus, extracting and transmitting audio and video files from the storage media frame by frame (supporting multiple formats such as MP4, AVI, JPG, and MP3) to the image decoding driver module. Simultaneously, it provides real-time feedback on the connection status of the storage media and file reading progress. Its coordination logic with other modules is as follows: Collaborative Image Decoding Driver Module: After the audio and video data transmitted through the USB port is parsed by the image decoding driver module, the video stream is converted by the decoding unit into a drive signal adapted to the display module, while the audio stream is separated and transmitted to the audio processing module. Collaborative display module and audio processing module: The image decoding driver module sends video display instructions to the display module according to the video frame timing, and at the same time sends audio synchronization playback instructions to the audio processing module to ensure the timing consistency between video presentation and audio output; Collaborative Control Module: The control module receives real-time feedback from the image decoding driver module regarding file playback progress and parameter settings, such as playback volume and screen brightness. It records the current playback status through a storage unit. When the user triggers a pause or resume command, the control module calls the stored status data to accurately restore the playback progress and parameters, ultimately achieving synchronized playback and controllable management of multi-format media files.

[0025] Industrial equipment linkage port: Utilizing standard industrial interfaces such as RS485 and Ethernet, this port is specifically designed for interfacing with industrial control equipment such as PLCs, sensors, and industrial controllers. It supports industrial communication protocols like Modbus and Profinet, and can receive real-time operating status signals from industrial equipment, such as normal operation signals, fault alarm signals, and parameter threshold trigger signals. During operation, the port converts the received industrial signals into standard digital signals recognizable by the system and transmits them to the industrial scene intelligent linkage control unit of the control module, providing signal support for deep linkage between the system and industrial systems. Its collaborative logic is as follows: Based on the type of industrial signal, the control module, in conjunction with the image decoding drive module, adjusts the display parameters of the display module, such as highlighting alarm icons and magnifying key data during fault alarms. Simultaneously, it coordinates with the audio processing module to switch audio output modes, such as playing alarm prompts, thus achieving signal linkage response in industrial scenarios.

[0026] The overall operating logic and core coordination of the signal input module: The module operates on the core logic of port-classified reception – preliminary signal processing – precise signal distribution and transmission – multi-module linkage response. After each port completes its dedicated reception and preliminary adaptation according to the signal type, it distributes video signals, audio signals, control signals, and industrial linkage signals to the corresponding subsequent units such as the ESD protection module and control module according to the signal application. At the same time, the module communicates with the image decoding driver module and control module in real time to provide feedback on the signal access status and data transmission progress of each port, ensuring that the subsequent processing modules start the corresponding functions as needed. This achieves orderly reception and precise transmission of multiple types of signals and coordinated linkage of various modules, ultimately achieving full adaptation to industrial scenarios and daily use scenarios.

[0027] The ESD protection module is located between the signal input port and the subsequent processing module. It is used for electrostatic protection and has the functions of protection status monitoring and alarm. It can not only filter electrostatic interference in the input signal, but also detect the electrostatic interference intensity and the working status of the protection circuit in real time. When the interference exceeds the standard or the protection circuit is abnormal, it immediately sends an alarm signal to the control module. At the same time, it links the differential receiving module to temporarily reduce the signal transmission gain to avoid electrostatic breakdown of core components and provide active protection for subsequent modules. Specifically, the ESD protection module works in conjunction with the control module and differential receiving module to monitor the electrostatic interference intensity and its own working status in real time. When the interference exceeds the standard or is abnormal, it sends an alarm signal to the control module. At the same time, it links the differential receiving module to reduce the signal transmission gain to avoid electrostatic breakdown of core components. The control module records the protection status log. It should be further explained that the ESD protection module has four built-in functional units, each of which operates collaboratively according to the logic of monitoring, judgment, execution, and feedback: 1. Electrostatic Discharge Detection Unit: Employing a high-precision electrostatic sensor and signal amplitude detection circuit, this unit collects electrostatic interference signals from each input port in real time, including electrostatic pulse amplitude, duration, and interference frequency. The collected analog signals are converted into digital signals and compared in real time with preset safety thresholds set according to the IEC61000-4-2 industrial electrostatic discharge protection standard: slight interference threshold ≤2kV, moderate interference threshold 2-6kV, and severe interference threshold ≥6kV. The unit outputs the interference level judgment result: no interference, slight interference, moderate interference, or severe interference. Simultaneously, this unit also collects key electrical parameters of the protection circuit, such as voltage drop across the protection device and circuit continuity, providing data support for judging the protection circuit's status. 2. Protection Execution Unit: Composed of a TVS transient voltage suppressor diode, a gas discharge tube, and an RC filter circuit, it employs appropriate combinations of protection devices to address the characteristics of different types of input signals, such as the bandwidth requirements of RGB differential signals and the amplitude range of audio signals. For RGB differential signals and audio differential signals, low-capacitance TVS diodes with a capacitance value ≤1pF are used in conjunction with RC filter circuits to quickly discharge electrostatic energy while avoiding any impact on the signal amplitude and phase. For USB signals and industrial equipment linkage signals, a gas discharge tube with a breakdown voltage of 6-10kV and a TVS tube in series structure are used to enhance the protection against strong electrostatic shock. When the electrostatic detection unit detects interference, the protection execution unit immediately initiates the corresponding level of discharge action to quickly release the electrostatic energy through the grounding loop and filter out the electrostatic interference components in the input signal. Status monitoring unit: Real-time monitoring of the operating status of core components in the protection execution unit, such as TVS diodes and gas discharge diodes, including whether the devices have broken down or failed, whether the circuit is open / short-circuited, and whether the grounding loop is continuous; By detecting the change in the on-state voltage drop of the protection devices, such as the TVS diode's normal on-state voltage drop ≤0.5V, and the voltage drop ≥2V when it fails, it determines whether the protection circuit is in normal working condition and outputs a normal or abnormal status signal; Linkage control unit: As the communication core between the module and external modules, namely the control module and differential receiving module, it supports I2C / SPI communication protocol and GPIO control signal output. It is responsible for transmitting interference level signals and protection circuit status signals to associated modules, and receiving feedback instructions from external modules to trigger corresponding linkage actions.

[0028] The ESD protection module, with the core principle of ensuring signal protection without affecting transmission quality and abnormal response without interrupting system operation, forms a closed-loop collaboration with the control module, differential receiver module, and signal input module. The specific coordination steps are as follows: Step 1: Initialize adaptation and standby monitoring After the system starts up, the ESD protection module first completes port impedance matching with the signal input module to adapt to the signal transmission impedance of each input port, such as adapting the RGB differential port to a 50Ω impedance and the USB port to a 90Ω impedance, to ensure that there is no reflection loss in signal transmission. At the same time, the linkage control unit establishes a communication link with the control module, receives the electrostatic threshold configuration parameters sent by the control module, supports users to customize and adjust according to the needs of industrial scenarios, the status monitoring unit and the protection execution unit enter the standby monitoring state, and the electrostatic detection unit begins to collect electrostatic signals from each port in real time. Step 2: Signal Access and Real-time Protection When an external signal, such as an RGB differential signal or a USB data signal, is connected to any port of the signal input module, the signal first flows through the protection execution unit of the ESD protection module: If the electrostatic detection unit does not detect electrostatic interference and the interference amplitude is less than the slight interference threshold, the protection execution unit will only perform routine signal purification through the RC filter circuit to ensure that the signal is transmitted to the subsequent processing module without distortion, such as RGB signal being transmitted to the differential receiving module and audio signal being transmitted to the audio processing module. If a slight interference is detected, and the interference amplitude is greater than or equal to the slight interference threshold (2kV ≥ interference amplitude ≥ slight interference threshold), the protection actuator will activate the TVS diode to quickly discharge the electrostatic energy while maintaining the signal transmission gain unchanged to avoid affecting normal signal processing. Step 3: Interference Exceeding Limits / Circuit Abnormalities Linked Response When the electrostatic discharge detection unit detects moderate / severe interference with an amplitude greater than or equal to the moderate interference threshold, or when the status monitoring unit detects an abnormality in the protection circuit, such as a TVS diode failure or a grounding loop open circuit, a graded linkage response is initiated: The linkage control unit sends a gain reduction control signal to the differential receiving module through the GPIO pin. After receiving the signal, the differential receiving module reduces the signal transmission gain by 30%-50% within 10μs, dynamically adjusting according to the interference level. It reduces the gain by 50% for severe interference and 30% for moderate interference, thereby reducing the impact of electrostatic interference on the core decoding circuit. Meanwhile, the linkage control unit sends alarm signals to the control module via the I2C bus. The signals contain key information such as interference level, originating port, and protection circuit status, such as RGB port - severe interference - protection circuit normal; USB port - protection circuit abnormal - TVS tube failure. After receiving the alarm signal, the control module immediately records the protection status log through the industrial scene intelligent linkage control unit, including the alarm time, interference parameters, and handling measures. If it is an industrial scene application, the alarm information is simultaneously fed back to the external industrial control system. If it is a severe interference or circuit abnormality, an audible and visual alarm is triggered, and the alarm prompt sound is played through the audio processing module and the alarm icon pops up through the display module. Step 4: Reset after interference subsidence / fault recovery The electrostatic detection unit continuously monitors the interference signal. When the interference amplitude drops below the slight interference threshold and remains stable for 50ms, the linkage control unit sends a gain recovery control signal to the differential receiving module, and the differential receiving module restores its normal transmission gain. If the protection circuit malfunctions, the control module logs the information and then periodically checks the status monitoring unit's detection results every 1 second through the linkage control unit until the protection circuit returns to normal. If the faulty component is replaced, the alarm status is automatically cleared and the system returns to normal operation.

[0029] The differential receiver module receives RGB differential signals, restores them to single-ended RGB signals, and has adaptive noise suppression capabilities. After receiving the ESD-protected RGB differential signals, it uses a built-in interference detection unit to identify the intensity of environmental electromagnetic interference in real time and dynamically adjust the noise suppression threshold. When the interference is weak, the suppression intensity is reduced to protect signal details, and when the interference is strong, the suppression intensity is increased to shield noise, accurately restoring the single-ended RGB signals. This provides a low-noise, high-fidelity basic signal for image decoding and further enhances the anti-interference capability of long-distance transmission. Specifically, the differential receiver module adopts a multi-channel differential-to-single-ended receiver structure, working in conjunction with the ESD protection module and the image decoding driver module. It first receives the RGB differential signal through electrostatic protection, and then uses adaptive common-mode noise suppression technology to dynamically adjust the noise suppression threshold according to the intensity of environmental interference, accurately restoring the single-ended RGB signal and providing a low-noise, high-fidelity base signal for the image decoding driver module. It should be further explained that the differential receiver module, as the core front-end unit for video signal processing, adopts a three-channel differential-to-single-ended receiver architecture, processing the R / G / B primary color signals independently. It integrates a signal receiving unit, an interference detection unit, an adaptive noise suppression unit, and a signal conversion unit. Its core function is to receive the ESD-protected RGB differential signal and, through real-time interference monitoring, dynamic threshold adjustment, and precise signal conversion, restore a low-noise, high-fidelity single-ended RGB signal. Simultaneously, it works closely with the ESD protection module and the image decoding driver module to ensure signal integrity during long-distance transmission. The specific operating mechanism, collaborative methods, and steps are as follows: Core components and basic operating logic of the module: The module is designed based on the principle of independent channel processing and global collaborative control. The four functional units operate in an orderly manner according to the process of signal access, interference monitoring, noise suppression, and signal conversion. 1. Signal Receiving Unit: Each channel is equipped with a differential signal buffer and impedance matching circuit to adapt to 50-100Ω transmission link impedance and match the transmission characteristics of twisted pair. It can receive RGB differential signals R+ / R-, G+ / G-, and B+ / B- with an amplitude range of 0.2-1Vpp. After the signal is received, the buffer first performs amplitude stabilization and glitch filtering to avoid the reflection signal in the transmission link from affecting subsequent processing. At the same time, the output signal effectively triggers the signal to start the interference detection unit and the signal conversion unit.

[0030] 2. Interference Detection Unit: Employing a common-mode interference detection circuit and a signal-to-noise ratio (SNR) monitoring module, this unit collects the common-mode interference amplitude, differential-mode signal strength, and environmental electromagnetic interference frequency (10kHz-1GHz) of the three-channel differential signals in real time. The collected data is converted into digital quantized values ​​and compared with preset three interference thresholds: weak interference (SNR≥40dB, common-mode interference≤50mV); medium interference (30dB≤SNR<40dB, 50mV<common-mode interference≤100mV); strong interference (SNR<30dB, common-mode interference>100mV). The unit outputs real-time interference level signals for weak / medium / strong interference.

[0031] 3. Adaptive Noise Suppression Unit: The core of this unit consists of an adjustable gain common-mode choke and a programmable notch filter circuit. It receives the level signal from the interference detection unit and dynamically adjusts the noise suppression parameters. When there is weak interference: reduce the common-mode choke suppression gain, with an attenuation of ≤10dB, turn off the notch filter circuit or only retain low-frequency filtering <100kHz, and prioritize the protection of signal details, such as the grayscale levels of medical images and the edge texture of monitoring screens. When encountering moderate interference: Adjust the suppression gain to a moderate level, with an attenuation of 10-20dB, and activate the notch filter circuit to perform directional filtering for 50Hz power frequency and 2.4GHz wireless interference, balancing signal detail and noise suppression; Under strong interference: increase the suppression gain to the highest level, attenuate by 20-30dB, widen the notch filter bandwidth to 10kHz-1GHz, strengthen common-mode noise shielding, and at the same time avoid excessive attenuation of useful signal amplitude through signal compensation algorithm.

[0032] 4. Signal Conversion Unit: Employing a high-speed differential amplifier and single-ended conversion circuit, the noise-suppressed differential signals R+ / R-, G+ / G-, and B+ / B- are converted into standard single-ended RGB signals with an amplitude of 0.7Vpp and an impedance of 75Ω, conforming to the VGA signal standard. During the conversion process, the phase consistency of the three-channel signals is calibrated in real time, with a phase deviation ≤5ns to avoid color misalignment. Finally, a low-noise, highly synchronized single-ended RGB signal is output to the image decoding driver module.

[0033] The module uses signal flow synchronization and control signal interaction as its core coordination mechanism, forming a closed-loop linkage with the ESD protection module and the image decoding driver module. The specific coordination steps are as follows: Step 1: Initialize Coordination and Parameter Calibration After the system starts up, the differential receiving module establishes a communication link with the ESD protection module and the image decoding driver module through the I2C communication bus: Receive normal / abnormal port protection status signals from the ESD protection module. If the protection circuit is abnormal, the module will not start the signal receiving function until the protection status returns to normal. It receives signal adaptation parameters from the image decoding driver module, such as the target output single-ended signal amplitude and the three-channel phase calibration reference, and completes the initial parameter configuration of the internal conversion unit and suppression unit.

[0034] Step 2: Coordination of Signal Reception and Preprocessing The RGB differential signal from the signal input module is filtered for electrostatic discharge by the ESD protection module and then transmitted to the signal receiving unit of the differential receiving module. The ESD protection module feeds back the current electrostatic interference level to the differential receiving module in real time, indicating no interference, slight interference, moderate interference, or severe interference. If moderate or severe interference is reported, the differential receiving module will activate the medium / high intensity noise suppression mode in advance to avoid processing residual electrostatic interference signals. After completing impedance matching and signal buffering, the signal receiving unit sends a confirmation signal to the ESD protection module indicating that the signal has been received. The ESD protection module then uses this signal to determine whether to maintain the reduced gain state. If the electrostatic interference has subsided, the ESD protection module sends a gain recovery signal.

[0035] Step 3: Synergistic Interference Monitoring and Dynamic Suppression The interference detection unit collects signal and environmental interference data in real time, outputs the interference level to the adaptive noise suppression unit, and simultaneously synchronizes the level information to the image decoding driver module. The image decoding driver module adjusts the subsequent decoding strategy according to the interference level. For example, it activates the decoding fault tolerance mechanism when there is strong interference and prioritizes ensuring the decoding image quality when there is weak interference. The adaptive noise suppression unit dynamically adjusts the suppression parameters according to the interference level. During the process, the signal-to-noise ratio of the processed signal is collected in real time. If the signal-to-noise ratio does not reach the target value of ≥35dB, the suppression threshold is further optimized until the signal quality meets the requirements.

[0036] Step 4: Signal Conversion and Output Coordination After the signal conversion unit converts the differential signal into a single-ended RGB signal, it first uses an internal verification circuit to check whether the signal phase and amplitude match the adaptation parameters of the image decoding driver module. If the parameters meet the requirements, the single-ended RGB signal is directly output to the image decoding driver module through the high-speed data bus, and a synchronization signal indicating signal readiness is sent at the same time. If the parameters do not meet the standards, such as excessive phase deviation, the internal calibration algorithm is activated to adjust the conversion circuit parameters. After calibration, the signal is re-output and the calibration information is fed back to the image decoding driver module so that it can synchronously adjust the display driving timing.

[0037] Step 5: Abnormal State Linkage Response If the interference detection unit detects extreme strong interference (SNR < 25dB) or the signal receiving unit fails to detect a valid signal for 100ms, the module immediately sends an alarm signal indicating a signal abnormality to the control module and simultaneously triggers the ESD protection module to re-detect the port protection status. If the interference is caused by a failure of the protection, the signal transmission gain will be further reduced according to the linkage command of the ESD protection module. If the signal source is interrupted, the module enters a low-power standby state until a valid signal is detected again and normal operation resumes.

[0038] The core of the overall operating logic: The differential receiving module follows a closed-loop operating logic of adaptation-monitoring-adjustment-output, and its core advantages lie in its self-adaptation and strong coordination. Adaptive layer: It does not rely on fixed noise suppression parameters, but dynamically adjusts the strategy by monitoring the interference intensity in real time. This avoids the loss of signal details caused by excessive suppression when the interference is weak, and solves the problem of signal distortion caused by insufficient suppression when the interference is strong. At the coordination level: by interacting with the status of the ESD protection module, electrostatic interference can be dealt with in advance; by linking the parameters with the image decoding driver module, the output signal can be ensured to be accurately matched with the decoding requirements, providing a stable basic signal for high-definition decoding in long-distance, up to 50-meter, high-interference scenarios. Throughout the process, the module prioritizes signal quality and achieves efficient and accurate processing of differential signals through multi-unit collaboration and cross-module linkage, enhancing the applicability and reliability of the device in professional scenarios such as industrial control and medical imaging.

[0039] The synchronization separation module separates the line and field synchronization signals from the composite signal and has timing deviation compensation function; Specifically, the synchronization separation module includes an operational amplifier unit, a synchronization extraction circuit, and a synchronization signal fault tolerance calibration unit, which work in conjunction with the differential receiving module and the image decoding driving module. The operational amplifier unit optimizes the amplitude of the composite signal and filters interference, the synchronization extraction circuit separates the horizontal and vertical synchronization signals, and the fault tolerance calibration unit automatically compensates for timing deviations to ensure that the synchronization signal and the image signal are accurately matched in timing, thus avoiding screen tearing and misalignment. It needs to be further explained that: 1. Operational Amplifier Unit: Employs a high-bandwidth ≥250MHz low-noise operational amplifier with built-in programmable gain adjustment circuit and second-order low-pass filter network; receives the RGB composite signal output from the differential receiver module, which includes image data and synchronization signal superimposed. First, the signal amplitude is amplified to the standard range of 1.0-1.2Vpp to match the threshold of the subsequent extraction circuit. Then, it is passed through the low-pass filter network, and the cutoff frequency can be dynamically adjusted from 100kHz to 1MHz to filter high-frequency noise interference while preserving the pulse characteristics of the synchronization signal. The optimized pure composite signal is then output to the synchronization extraction circuit. 2. Synchronization Extraction Circuit: It has a built-in dual threshold comparator and synchronization signal recognition logic, and pre-stores the characteristic parameters of the horizontal / vertical synchronization signals. Horizontal synchronization: pulse width 4-12μs, frequency 15-100kHz; Vertical synchronization: pulse width 0.5-2ms, frequency 50-60Hz. After receiving the optimized composite signal, the synchronization pulse is separated by the threshold comparator. The pulse higher than 0.8Vpp is determined to be a synchronization pulse. Then, based on the characteristic parameters, the horizontal and vertical synchronization signals are distinguished, and the mixed pseudo synchronization pulses are eliminated. The initially separated dual synchronization signals are output to the fault-tolerant calibration unit.

[0040] 3. Timing reference generation unit: In conjunction with the image decoding driver module, it receives standard timing parameters sent by the module, such as the horizontal frequency, vertical frequency, and sync pulse width corresponding to the target display resolution, and generates a stable timing reference signal with an error ≤10ns, which serves as a calibration reference for the synchronization signal; at the same time, it tracks the display mode switching instructions of the image decoding driver module in real time, dynamically updates the timing reference, and adapts to different resolutions, from standard definition to 4K synchronization requirements. 4. Synchronization Signal Fault-Tolerant Calibration Unit: The core consists of a timing detection circuit and a dynamic compensation module. It acquires the initially separated horizontal and vertical synchronization signals and timing reference signal in real time. Through three dimensions—phase difference detection, pulse width comparison, and frequency consistency verification—it determines the timing deviation of the synchronization signal. Phase deviation: When the phase difference between the actual synchronization signal and the reference signal is greater than 10ns, phase compensation is activated, and the signal delay time is adjusted through the delay line circuit. Pulse width deviation: When the actual pulse width deviates from the reference value by more than 10%, the width is corrected by the pulse shaping circuit; Frequency deviation: When the deviation between the actual signal frequency and the reference frequency is greater than 5%, the frequency locking mechanism is triggered to dynamically adjust in accordance with the reference frequency. After calibration, the precisely time-matched line and field synchronization signals are output to the image decoding driver module.

[0041] The module uses signal flow synchronization and control signal interaction as its core, forming a closed-loop linkage with the differential receiving module and the image decoding driver module to ensure precise matching between the synchronization signal, image signal, and display timing. The specific coordination steps are as follows: Step 1: Initialize Coordination and Reference Calibration After the system starts up, the synchronization separation module establishes a communication link with the differential receiving module and the image decoding driver module through the SPI communication bus: The module receives the signal processing status from the differential receiving module, such as signal validity / invalidity and current interference level. If the signal is invalid, the module enters standby mode until a valid signal is received. The timing reference generation unit receives the initial display mode parameters sent by the image decoding driver module, such as the timing reference corresponding to the default resolution 1920x1080@60Hz. The timing reference generation unit immediately generates the corresponding standard timing signal to complete the reference reference configuration of the fault-tolerant calibration unit.

[0042] Step 2: Coordination of Signal Reception and Preprocessing When the differential receiver module outputs the processed RGB composite signal to the synchronization separation module, the synchronization transmission signal is ready. After receiving the signal, the operational amplifier unit of the synchronization separation module adjusts the filtering parameters according to the interference level fed back by the differential receiving module. When there is strong interference, the filtering bandwidth is tightened to 100kHz, and when there is weak interference, it is widened to 1MHz to avoid over-filtering and causing synchronization pulse distortion. After the operational amplifier unit completes signal optimization, it sends a preprocessing completion signal back to the differential receiver module. The differential receiver module uses this signal to determine whether to maintain the current noise suppression level. If the synchronization separation module detects that there is still a lot of noise, it can request the differential receiver module to increase the suppression level.

[0043] Step 3: Synchronization Separation and Timing Calibration Coordination After the synchronization extraction circuit separates the initial horizontal and vertical synchronization signals, the fault-tolerant calibration unit immediately starts comparing them with the timing reference signal: If a timing deviation is detected, such as phase delay caused by long-distance transmission, the deviation data, deviation type, and deviation value are fed back to the image decoding driver module in real time. The image decoding driver module adjusts the pre-compensation parameters of the display driving timing according to the deviation data, and at the same time sends a calibration command to the synchronization separation module. The fault-tolerant calibration unit starts the corresponding compensation mechanism according to the command, such as phase compensation and width correction. During the calibration process, the image decoding driver module receives the calibrated synchronization signal in real time to verify whether it matches its own driving timing. If it does not match, it sends a recalibration signal until the deviation is ≤10ns.

[0044] Step 4: Coordinated Actions During Display Mode Switching When the user triggers a resolution switch via the control module, such as switching from 1080P to 4K, or when the image decoding driver module recognizes different resolution video signals input via USB: The image decoding driver module first sends a mode switching forecast signal and new timing reference parameters to the synchronization separation module; The timing reference generation unit of the synchronization separation module immediately updates the reference signal, the synchronization extraction circuit adjusts the threshold of the synchronization characteristic parameter, and the fault tolerance calibration unit resets the compensation parameter. The differential receiving module synchronously receives the mode switching signal and adjusts the output timing of the RGB composite signal to ensure that the composite signal received by the synchronous separation module is compatible with the new timing reference, so as to achieve uninterrupted and misaligned synchronization signal during mode switching.

[0045] Step 5: Abnormal State Linkage Response If the synchronization extraction circuit fails to detect a valid synchronization pulse for 100 ms consecutively, or the fault-tolerant calibration unit detects an extreme timing deviation that cannot be corrected, such as a phase difference > 100 ns: The module immediately sends a synchronization failure alarm signal to the control module, and at the same time reports a signal failure to the differential receiving module, requesting it to re-detect the signal quality. After receiving the signal, the differential receiving module strengthens the noise suppression intensity and re-outputs the composite signal; if it is still abnormal, the control module triggers an audible and visual alarm, displays a synchronous abnormal prompt on the display module, plays an alarm sound on the audio processing module, and records an abnormal log, including the abnormal time, deviation data, and signal status.

[0046] The synchronization and separation module follows a closed-loop operation logic of adaptation-separation-calibration-coordination, and its core advantages lie in its fault tolerance and strong linkage: In terms of fault tolerance: Through multi-dimensional timing detection and dynamic compensation, the synchronization deviation caused by long-distance transmission and electromagnetic interference is eliminated, avoiding screen tearing and misalignment, and solving the pain points of weak anti-interference and poor adaptability of traditional synchronization separation solutions. In terms of linkage: by interacting with the signal status of the differential receiving module, the preprocessing parameters are optimized; by linking with the timing reference of the image decoding driving module, the synchronization signal and the display driving timing are accurately matched to adapt to multi-resolution scenarios from standard definition to 4K. Throughout the process, the module takes "precise timing matching" as its core objective. Through the collaboration of various units and cross-module linkage, it provides a stable and synchronous reference signal for the image decoding drive module, ensuring the display stability and consistency in high-definition and long-distance scenarios.

[0047] The image decoding driver module receives video-related signals, optimizes and processes them to drive the display module, and has dynamic resolution adaptation capabilities. Specifically, the image decoding driver module integrates a signal decoding unit, a display driver unit, an automatic tuning unit, and a dynamic resolution intelligent adaptation unit, and works in conjunction with the differential receiving module, the synchronization separation module, and the display module. The automatic tuning unit optimizes the signal through coordinated operations such as phase calibration and positioning adjustment. The dynamic resolution intelligent adaptation unit automatically identifies the input signal resolution, from standard definition to 4K, and adapts and switches the display driver mode accordingly. At the same time, it links with the image quality dynamic enhancement unit of the display module to optimize the display parameters for different scenarios. It needs to be further explained that: 1. Signal Decoding Unit: Supports dual-channel decoding of analog RGB signals, USB audio and video files, and formats such as MP4 / AVI / JPG. It has a built-in multi-format signal analysis engine. When receiving single-ended RGB signals, it converts the analog signal into a 10-bit digital signal through analog-to-digital conversion (ADC) and extracts image pixel data and color space information. When receiving audio and video data from USB input, it analyzes the file encapsulation format, separates the video stream, H.264 / H.265 encoding, and audio stream. After decoding, the video stream is converted into standard pixel array data, and a synchronization signal with separated audio and video is output to the audio processing module. 2. Dynamic Resolution Intelligent Adaptation Unit: The core consists of a resolution recognition engine and a drive mode switching circuit, which confirms the input signal resolution through a dual recognition mechanism. Hardware identification: Detection of the output of the synchronization separation module Horizontal frequency (standard definition: 15-30kHz, high definition: 30-60kHz, 4K: 60-120kHz) and Field frequency (50-60Hz), combined with the pixel clock frequency of the single-ended RGB signal, is matched with a preset resolution database, including 12 mainstream resolution parameters such as VGA / 720P / 1080P / 2K / 4K; Software recognition: Parses the header information of USB video files, such as resolution identifiers, frame rate parameters, or signal format instructions transmitted by external devices, to supplement the accuracy of hardware recognition; After recognition is completed, the output resolution identification signal is given, such as 4K@60Hz; 1080P@50Hz. The drive mode switching circuit automatically switches the corresponding output link, single link / dual link LVDS, bit width (8 / 10 bits) and frame rate parameters to adapt to the hardware specifications of the display module. 3. Automatic Tuning Unit: Addressing signal distortion caused by long-distance transmission or interference, it optimizes signal quality through a four-step collaborative tuning process. The logic and operation of each step are clearly defined. Phase calibration: By comparing the phase difference between the single-ended RGB signal and the synchronization signal, the signal phase is adjusted through a delay line circuit to ensure that the phase deviation is ≤5ns and to avoid color misalignment; Positioning adjustment: Based on the image edge detection algorithm, the image offset caused by signal transmission is corrected, with the horizontal / vertical offset ≤2 pixels, ensuring that the image is displayed in the center; Offset compensation: Detects the baseline offset of the signal amplitude and corrects the offset to within ±10mV through a DC compensation circuit to avoid the image being too dark or too bright; Gain adjustment: Based on the signal amplitude and strength, with a target amplitude of 0.7Vpp, the signal gain is dynamically adjusted. At the same time, the interference level fed back by the differential receiving module is combined to balance the signal strength and noise suppression, ensuring a signal-to-noise ratio ≥40dB. During the tuning process, the quality parameters of the optimized signal are collected in real time to form a closed-loop tuning, which involves tuning, detection, and retuning until the signal quality meets the standard. 4. Display Driver Unit: Supports single / dual-link LVDS output and has a built-in display timing generator; after receiving optimized digital image data, it converts it into LVDS drive signals adapted to the display module, including pixel clock, data enable, and horizontal / vertical synchronization signals. At the same time, it adjusts the signal output timing according to the panel characteristics of the display module, such as pixel arrangement and response time, to ensure that the drive signal and the panel refresh timing are accurately matched, with a timing deviation of ≤10ns; the output end has a built-in signal buffer to enhance the driving capability and supports panel connection cable transmission up to 10 meters.

[0048] 5. Timing Coordination Unit: As the core of cross-module coordination, it interacts in real time with the differential receiving module, synchronization separation module, and display module via the I2C / SPI communication bus. Receive timing deviation data from the synchronization separation module and adjust the pre-compensation parameters for the display driver timing; Feedback on signal decoding quality to the differential receiver module to guide it in optimizing noise suppression strength; It receives panel status signals from the display module, such as backlight on status and refresh rate, and synchronously adjusts the output rhythm of the drive signal.

[0049] The module uses signal flow as the dominant force and control signal feedback as its collaborative core, and works in deep coordination with the differential receiving module, synchronization separation module, display module, audio processing module, and control module to ensure consistency in signal processing and display throughout the entire process. The specific coordination steps are as follows: Step 1: Initialize Coordination and Configure Parameters After the system starts up, the image decoding driver module establishes connections with each associated module through the communication bus: Receive signal processing parameters from the differential receiver module, such as signal amplitude range and current interference level, configure the ADC sampling accuracy of the signal decoding unit, and increase the sampling bit width to 12 bits when the interference is strong; The timing reference of the receiving synchronization separation module is such as the line / field frequency parameters corresponding to the default 1080P@60Hz. The timing coordination unit generates the initial drive timing. The display module receives hardware specifications such as panel resolution limit, LVDS interface type, and image enhancement support capabilities. The dynamic resolution intelligent adaptation unit updates the resolution adaptation range, and the display driver unit configures the output link and bit width. The system receives user-preset parameters from the control module, such as the default image quality mode and brightness / contrast parameters, and loads the corresponding configurations into the automatic tuning unit and the image quality dynamic enhancement unit of the display module.

[0050] Step 2: Signal reception and decoding coordination When the differential receiver module outputs a single-ended RGB signal, a signal indicating signal readiness is synchronously transmitted: The signal decoding unit of the image decoding driver module starts ADC sampling, while the timing coordination unit sends a command requesting a synchronization signal to the synchronization separation module, receiving a stable signal. The signal ensures that the decoding timing is consistent with the synchronization signal; If it is a USB input signal, the USB port of the signal input module sends a signal during file data transmission to the image decoding driver module. The signal decoding unit starts the file parsing engine, separates the audio and video streams, sends an audio stream ready signal to the audio processing module, and synchronously starts video stream decoding. During the decoding process, if signal distortion is detected, such as pixel loss or color deviation, the differential receiving module is immediately notified of a low signal quality, requesting it to increase noise suppression or retransmit the signal.

[0051] Step 3: Collaboration between resolution adaptation and image quality optimization After the dynamic resolution intelligent adaptation unit completes resolution recognition, it initiates multi-module linkage adaptation: Send a resolution identification signal to the display driver unit, and the driver unit switches the LVDS output mode, such as switching to dual-link 10-bit LVDS output for 4K resolution; Send scene-based optimization commands to the image quality dynamic enhancement unit of the display module: Medical imaging scenarios: Enhance grayscale differentiation, improve 10-bit grayscale resolution, reduce color saturation, and highlight lesion details; Surveillance scenarios: Improve the sharpness of dynamic images through edge enhancement algorithms, increase contrast, and reduce motion blur; Typical scenarios: Balance color reproduction and brightness output to adapt to human visual habits; The system feeds back the current resolution and image quality mode to the control module, which then stores the parameters in the storage unit for easy switching by the user later.

[0052] Step 4: Auto-tuning and display driver coordination The automatic tuning unit initiates a four-step tuning process, simultaneously coordinating with the synchronization separation module and the display module: During phase calibration, the timing reference signal from the receiving synchronization separation module is compared with the phase of the decoded image signal, and the phase compensation parameters are adjusted accordingly. After positioning adjustment and offset compensation, a pre-display signal is sent to the display module. The display module provides feedback on the image position and brightness detection results. If there is a deviation, secondary tuning is triggered. After tuning, the display driving unit generates the final LVDS driving signal and sends a valid driving signal instruction to the display module. The display module then activates the backlight and receives the signal to display the image. The timing coordination unit monitors the refresh status of the display module in real time. After each frame of image is displayed, it receives frame synchronization feedback and dynamically adjusts the output rhythm of the drive signal to avoid screen tearing.

[0053] Step 5: Coordination of Mode Switching and Anomaly Response When switching resolution / scene modes, such as when a user switches to 4K mode via the control module or when industrial equipment triggers monitoring mode: The control module sends mode switching instructions and target parameters to the image decoding driver module; The module immediately sends a signal to the differential receiving module and the synchronization separation module to warn of the switchover. The differential receiving module adjusts the signal output timing, and the synchronization separation module updates the timing reference. The dynamic resolution intelligent adaptation unit switches the driving mode, the automatic tuning unit restarts the tuning process, and the display driving unit updates the output parameters synchronously. The entire switching process is completed within 100ms without screen flickering or interruption. If decoding failure, signal loss, or drive abnormality is detected, such as LVDS signal output interruption: The module immediately sends an alarm signal indicating a display abnormality to the control module, including the type of abnormality, such as resolution not being recognized or drive signal failure. The control module triggers an audible and visual alarm, the display module pops up an abnormal message, the audio processing module plays an alarm sound, and the abnormal log is recorded at the same time. The image decoding driver module automatically switches to the default mode 1080P@60Hz to ensure uninterrupted system operation, waiting for user troubleshooting or automatic recovery.

[0054] The core of the overall operating logic: The image decoding driver module follows the core logic of accurate recognition - dynamic adaptation - closed-loop optimization - collaborative driving, and its core advantages are reflected in its adaptability and linkage. In terms of compatibility: Through a dual resolution recognition mechanism and switchable driving mode, it achieves full compatibility from standard definition to 4K, solving the pain point of limited resolution of traditional modules, while supporting flexible docking of display panels of different specifications. At the level of linkage: with the module as the central hub, it links upward to the differential receiving module and the synchronization separation module to optimize signal input quality, links downward to the display module and the audio processing module to achieve audio and video synchronization and image quality enhancement, and links outward to the control module to achieve parameter storage and anomaly handling, forming a closed loop of full-process collaboration; The entire operation prioritizes signal quality and display effect. Through parallel processing of each unit and precise linkage across modules, the device ensures high-definition, stable, and flexible display in long-distance, high-interference, and multi-scenario environments, fully adapting to the stringent requirements of professional fields such as industrial control, medical imaging, and rail transportation.

[0055] The display module features dynamic image quality enhancement to meet the display needs of different professional scenarios. Specifically, the display module's dynamic image enhancement unit works in conjunction with the control module to allow users to preset image quality parameter templates for different professional scenarios via the IR / KEY control port or industrial equipment linkage port. After the image decoding driver module identifies the signal scene type, it automatically calls the corresponding template. The template parameters can be modified and stored in real time through the control module, adapting to the personalized image quality needs of multiple scenarios such as medical imaging, rail transit monitoring, and industrial control interfaces. It adopts an LCD display panel, supports single / dual link multi-digit signal input, full HD (1920x1080) @60Hz display, 3D passive panel display, and signal jitter optimization output. It should be further explained that the image quality dynamic enhancement unit: its core is a multi-scene adaptive enhancement algorithm engine, integrating four core algorithm modules to optimize image quality for different professional scenarios: Gray-level enhancement module: Dedicated to medical imaging scenarios, it supports 10-bit gray-level resolution calibration and expands the gray-level dynamic range through histogram equalization algorithm, amplifying the gray-level difference between lesion areas and normal tissues by 20%-30% to improve detail recognition. Dynamic Sharpness Enhancement Module: Dedicated to rail transit monitoring scenarios, it employs edge detection and sharpening algorithms to enhance the edge contours of moving targets, such as vehicles and pedestrians, and reduce the blurriness of dynamic images. The motion blur compensation accuracy is ≤1 pixel. High contrast optimization module: Dedicated to industrial control interfaces, it uses a local contrast enhancement algorithm to highlight key interactive elements such as buttons and data values, while suppressing background noise to ensure that the interface is clearly identifiable in both bright and dark light environments. Color reproduction calibration module: Dedicated to general scenarios, based on the sRGB color space standard, calibrates color deviation (ΔE≤2) to ensure true color reproduction of images; Parameter storage and interaction unit: It links with the storage unit of the control module through the I2C communication interface to pre-store image quality parameter templates for at least 5 professional scenarios such as medical imaging, rail transit monitoring, and industrial control interfaces (each template contains 12 configurable parameters such as brightness, contrast, grayscale, sharpness, and color saturation); at the same time, it supports receiving parameter modification commands issued by the control module in real time, updating the template parameters and persisting them to ensure automatic loading on the next startup.

[0056] The module uses parameter linkage and scene response as its core collaboration mechanism, and works in deep collaboration with the image decoding driver module and control module to achieve automatic invocation, real-time adjustment and persistent storage of image quality templates. The specific collaboration steps are as follows: Step 1: Initialize collaboration and template loading After the system starts up, the display module establishes a connection with the control module and the image decoding driver module via the I2C communication bus: The parameter storage and interaction unit sends a parameter request signal to the control module, receives the default image quality template issued by the control module, such as the industrial control interface template and the user's historical adjustment parameters, and loads them into the image quality dynamic enhancement unit to complete the initial parameter configuration. Send panel hardware specification signals, such as maximum supported resolution, LVDS interface type, and response time, to the image decoding driver module. The image decoding driver module adjusts the drive signal output parameters, such as link mode, bit width, and timing, based on these signals to ensure that the drive signals are compatible with the panel hardware.

[0057] Step 2: Scene Recognition and Automatic Template Recall The image decoding driver module identifies scene types based on signal characteristics. For example, after detecting the DICOM format identifier of medical images, the dynamic frame rate characteristics of surveillance videos, or the fixed layout characteristics of industrial interfaces, it sends a scene identifier plus a template call command to the display module, such as medical images - template 1; surveillance scenes - template 2. After receiving the instruction, the parameter storage and interaction unit of the display module quickly retrieves the corresponding preset image quality template and transmits the parameters to the image quality dynamic enhancement unit. The image quality dynamic enhancement unit starts the corresponding enhancement algorithm according to the template parameters. For example, the gray level enhancement module is started in the medical scene, and the dynamic sharpness enhancement module is started in the monitoring scene. At the same time, it sends a signal to the image decoding driver module that the template loading is complete. After receiving feedback, the image decoding driver module synchronously outputs the optimized LVDS drive signal. The panel control unit receives the signal and adjusts the backlight brightness and refresh timing according to the template parameters to achieve scene-specific image quality display.

[0058] Step 3: Real-time parameter adjustment and collaborative storage It supports two parameter adjustment methods, both of which are implemented through multi-module collaboration: User manual adjustment: The user sends parameter adjustment commands, such as increasing brightness or enhancing sharpness, through the IR / KEY control port. The command processing unit of the control module converts them into standard parameter signals and sends them to the parameter storage and interaction unit of the display module. Industrial equipment linkage adjustment: Industrial equipment sends scene switching or parameter adjustment signals through the linkage port. For example, when rail transit brakes, it is necessary to increase the screen brightness. The control module receives the signal and forwards it to the display module. The display module's dynamic image enhancement unit responds to adjustment commands in real time, updates corresponding parameters, such as brightness adjustment step size of 5 cd / ㎡ and sharpness adjustment step size of 5%, and synchronously feeds back the adjusted parameter values ​​to the control module. The control module's storage unit records the updated parameters. If the user chooses to save it as a custom template, the parameters are bound to the current scene and stored to form a new custom template, which will be automatically loaded the next time the scene is called.

[0059] Step 4: Display Mode Switching and Collaborative Adaptation When the image decoding driver module triggers a resolution switch, such as switching from 1080P to 4K or a scene switch: The image decoding driver module first sends a mode switching preview signal and new driving parameters to the display module, such as dual-link LVDS output and 10-bit width; The panel control unit of the display module immediately switches the interface receiving mode, the parameter storage and interaction unit retrieves the corresponding scene adaptation template, such as the medical image template under 4K resolution, and the image quality dynamic enhancement unit adjusts the algorithm parameters, such as improving the grayscale resolution accuracy in 4K mode. After the image decoding driver module outputs a new LVDS drive signal, the panel control unit synchronously starts refreshing. The entire switching process is completed within 100ms, without screen flickering, black screen, or misalignment. After the switch is completed, the display module sends a signal to the control module indicating that the mode switch was successful, and the control module records the current mode and parameter configuration.

[0060] Step 5: Collaborative Response to Abnormal States If the display module detects an anomaly, such as LVDS signal interruption, backlight driver failure, or parameter loading failure: The panel control unit immediately sends feedback on the signal abnormality to the image decoding drive module, and at the same time sends an alarm signal to the control module, including the type of abnormality, such as loss of drive signal or backlight failure. After receiving feedback, the image decoding driver module pauses outputting drive signals and switches to the default low-power mode. The control module triggers an audible and visual alarm, plays the alarm sound through the audio processing module, and displays the alarm icon through the display module before the fault is recovered. At the same time, it records an anomaly log, including the anomaly time, the current scene, and the parameter status. If parameter loading fails, the display module automatically retrieves the most basic general image quality template to ensure normal image display, and waits for user troubleshooting or for the control module to issue a repair command.

[0061] The display module follows the core logic of template preset - scene linkage - real-time optimization - persistent storage, and its core advantages are reflected in scene adaptability and collaborative flexibility: In terms of scene adaptability: By segmenting professional scene image enhancement algorithms and configurable templates, we can specifically solve the image quality pain points of different scenes, such as the detail recognition of medical images and the dynamic clarity of monitoring scenes, breaking through the traditional one-size-fits-all image quality processing mode of display modules. In terms of collaborative flexibility: the upward linkage with the image decoding driver module enables scene recognition and driver adaptation, while the outward linkage with the control module enables parameter customization and storage, supporting both manual adjustment and industrial equipment linkage adjustment modes to meet the operational needs of different users. The entire operation aims to accurately match the display effect with the needs of the scene. Through the high adaptability of hardware, the dynamic enhancement capability of algorithms and the deep collaboration of multiple modules, the display quality of the device in professional scenarios such as medical imaging, rail transit, and industrial control is ensured, while also taking into account the ease of operation and operational reliability.

[0062] The audio processing module decodes, amplifies, and outputs audio signals, and also has audio-video synchronization delay calibration functions; Specifically, the audio processing module includes an audio decoding unit, a power amplification unit, and an audio delay intelligent calibration unit, which work in conjunction with the image decoding driver module. The audio delay intelligent calibration unit detects the video signal transmission delay in real time and automatically adjusts the audio output delay to ensure that the audio and video synchronization error is less than 10ms, thereby achieving accurate audio and video synchronization output. It needs to be further explained that: 1. Audio Decoding Unit: Supports dual-channel audio input decoding, adapting to multiple audio signal formats. Differential audio input decoding: Receives A+ / A- differential audio signals after ESD protection, with an amplitude range of 0.1-2Vpp. Converts the signals to single-ended analog signals through a differential-to-single-ended circuit, and then converts them to digital signals through a 16-bit ADC with a sampling rate of 44.1-192kHz. Filters low-frequency noise ≤20Hz and high-frequency noise ≥20kHz. USB audio stream decoding: Receives the USB audio stream separated from the image decoding driver module, supports mainstream formats such as MP3, WAV, and AAC, decodes it into a standard PCM digital audio signal through the audio format parsing engine, adaptively matches the sampling rate, and outputs it to the audio delay intelligent calibration unit. The audio signal integrity is monitored in real time during the decoding process. If signal interruption or distortion occurs, an audio decoding abnormality warning is immediately sent to the control module. 2. Audio Delay Intelligent Calibration Unit: Its core components are a timing detection circuit, a programmable delay line circuit, and a synchronization calibration algorithm. It is the core unit for achieving audio and video synchronization. Timing detection: The system receives video frame synchronization signals and video transmission delay data from the image decoding driver module in real time via the SPI communication bus. The delay value ranges from 0 to 50 ms. At the same time, it collects the decoding delay of its own audio signal ≤ 5 ms and calculates the current time difference between audio and video. Delay Adjustment: Built-in programmable delay line circuit, delay adjustment range 0-50ms, adjustment step 1μs, dynamically adjusts audio signal output delay according to the calculated time difference. If the video delay is greater than the audio delay, increase the audio output delay; if the audio delay is greater than the video delay, shorten the audio delay through signal buffer optimization to ensure that the final synchronization error is ≤10ms. Closed-loop calibration: After each frame of audio is output, the audio and video synchronization verification result fed back by the image decoding driver module is received. If the error exceeds the threshold by more than 10ms, a second calibration is immediately started until the error meets the standard. 3. Power Amplification Unit: Adopts Class AB power amplifier architecture, with built-in overcurrent, overtemperature, and short-circuit protection circuits. It receives the calibrated audio signal and amplifies it to the output power of the compatible speaker through a programmable gain adjustment circuit with a gain range of 0-40dB and an adjustment step of 1dB. Mono / dual channel is selectable, with a maximum output power of 20W / channel. Supports sound quality optimization: Built-in low-frequency enhancement algorithm, strengthens 20-200Hz audio components and high-frequency noise reduction algorithm, suppresses noise above 15kHz, can enhance the recognition of alarm sounds in industrial scenarios, and can improve the clarity of voice prompts in medical scenarios; Protection mechanism: When an output short circuit, overcurrent >2A or chip temperature >85℃ is detected, the gain is automatically reduced or the output is cut off to avoid device damage, and a protection alarm signal is sent to the control module at the same time. 4. Signal matching unit: Responsible for impedance matching and format adaptation of audio input / output. Input adaptation: A 50-100Ω impedance matching circuit is configured for the differential audio input port to reduce signal reflection loss; a data buffer is configured for the USB audio stream to ensure stable reception by the decoding unit; Output compatibility: Supports mono / dual-channel output switching, output impedance 4-8Ω, compatible with mainstream industrial speakers, built-in signal buffer to enhance driving capability, supports speaker cable transmission up to 5 meters, and has no signal attenuation.

[0063] The module uses timing synchronization and signal linkage as its core collaboration mechanism, and works closely with the image decoding driver module, signal input module, and control module to ensure precise synchronization between audio output and video display, and adaptability to multiple scenarios. The specific collaboration steps are as follows: Step 1: Initialize Coordination and Configure Parameters After the system starts up, the audio processing module establishes connections with each associated module through the I2C / SPI communication bus: Receive initial synchronization parameters from the image decoding driver module, such as the default video delay baseline value and the audio sampling rate adaptation range. The audio delay intelligent calibration unit loads the initial calibration threshold, and the synchronization error is ≤10ms. Receive user-preset parameters from the control module, such as default volume, gain level, and scene audio mode: industrial alarm / medical alert / general mode, and configure corresponding gain and sound quality optimization parameters for the power amplifier unit; The signal input module sends a signal indicating that audio reception is ready. The audio input port of the signal input module then initiates signal detection, preparing to transmit the differential audio signal.

[0064] Step 2: Signal reception and decoding coordination Audio signals are processed in two channels simultaneously based on input type: Differential audio input: The audio port of the signal input module receives A+ / A- differential signals, which are transmitted to the audio processing module after ESD protection. At the same time, an audio signal is sent to effectively trigger the signal. The audio decoding unit starts the differential-to-single-ended conversion and ADC conversion. After decoding is completed, it sends an audio decoding ready signal to the image decoding driver module and waits for the synchronization calibration command. USB audio input: After the image decoding driver module parses the USB audio and video file, it separates the audio stream and sends it to the audio processing module. At the same time, it synchronously sends video decoding progress signals, such as video frame number and decoding delay. The audio decoding unit decodes the audio stream synchronously according to the video decoding progress to avoid audio being ahead or behind.

[0065] Step 3: Delay calibration and synchronous output coordination The audio delay intelligent calibration unit initiates the core synchronization process, working in a closed-loop manner with the image decoding driver module: Receive the current video frame synchronization signal and video transmission delay value sent by the image decoding driver module, such as a 12ms delay after long-distance video transmission; Calculate the current audio delay, such as a decoding delay of 3ms, and obtain the audio-video time difference: 12ms - 3ms = 9ms. Then, activate the programmable delay line circuit to add a 9ms delay to the audio signal. After calibration, a calibration-ready signal is sent to the power amplifier unit, which then amplifies the audio signal according to the preset gain and drives the speaker output. The image decoding driver module synchronously sends video display commands to the display module to ensure that the timing of audio output and video frame display is perfectly matched, and the synchronization error is ≤10ms as detected by an oscilloscope. The system receives synchronization verification feedback from the image decoding driver module every 100ms. If delay fluctuations occur due to signal interference, such as video delay becoming 15ms, the audio delay is immediately and dynamically adjusted to 12ms to maintain synchronization accuracy.

[0066] Step 4: Coordinating Scene Switching and Parameter Adjustment When the system triggers a scene switch, such as from an industrial control scene to a medical imaging scene, or when the user adjusts parameters: The control module sends scene switching commands to the audio processing module, such as medical prompt mode, or parameter adjustment commands such as volume +5dB; gain decrease 10dB. The power amplifier unit immediately adjusts the sound quality optimization parameters, enhancing the mid-frequency component of voice in medical mode and enhancing the low-frequency component of alarm tone or volume / gain in industrial mode. If a scene change is accompanied by a video resolution adjustment, such as 1080P→4K, the image decoding driver module sends a video delay update signal to the audio processing module. In 4K mode, the video delay increases to 18ms, and the audio delay intelligent calibration unit adjusts the audio delay to 15ms to ensure that the synchronization error remains unchanged. After the adjustment is completed, the audio processing module sends a signal to the control module that the parameters have been successfully updated, and the control module records the current scene and audio parameters.

[0067] Step 5: Collaborative Response to Abnormal States If the audio processing module detects an anomaly, such as differential audio signal loss, USB audio decoding failure, synchronization calibration timeout, or power amplification overheating: Immediately send audio anomaly feedback to the image decoding driver module, and simultaneously send an alarm signal to the control module, including the anomaly type, such as signal loss; calibration timeout; over-temperature protection; After receiving feedback, the image decoding driver module can choose to pause or continue video playback. In industrial scenarios, video playback is prioritized, and an audio mute command is sent simultaneously. The control module triggers an audible and visual alarm, the display module pops up an audio abnormality prompt, plays a prompt tone through its own linked alarm circuit, and records an abnormality log, including the abnormality time, current scene, delay data, and protection status. If the synchronization calibration timeout occurs, the audio processing module will automatically activate the backup synchronization scheme and output audio with a fixed delay of 10ms to ensure that the audio is not interrupted; if the over-temperature protection occurs, the output will automatically resume after the temperature drops below 60℃.

[0068] The audio processing module follows the core logic of multi-source adaptation, real-time calibration, synchronous output, and fault tolerance. Its core advantages lie in synchronization accuracy and scene adaptability. In terms of synchronization accuracy: through timing linkage with the image decoding driver module, 1μs-level delay adjustment and closed-loop calibration, the audio and video synchronization error is controlled within 10ms, solving the synchronization misalignment problem caused by long-distance transmission and high-resolution decoding, and breaking through the limitations of fixed delay in traditional audio modules. In terms of scenario adaptability: It supports dual-source input of differential audio and USB audio, and adapts to multiple scenarios such as industrial alarms and medical prompts through configurable gain and sound quality optimization algorithms, meeting the stringent requirements of professional fields for audio recognition and stability. The entire operation is centered on audio and video synchronization and based on stable output. Through the collaborative processing of each unit and the precise linkage across modules, the device ensures the audio output quality in multiple scenarios and environments with multiple interferences, while also taking into account fault tolerance and operational flexibility.

[0069] The control module receives control commands and industrial equipment signals, adjusts system operating parameters, and has intelligent linkage functions. Specifically, the control module includes a storage unit, an instruction processing unit, and an intelligent linkage control unit for industrial scenarios, which works in conjunction with the display module, audio processing module, ESD protection module, and external industrial equipment. The intelligent linkage control unit for industrial scenarios receives operating status signals from industrial equipment, automatically adjusts display parameters and audio output status, and triggers scenario-based alarms. At the same time, it receives alarm signals from the ESD protection module, feeds back fault information to the industrial control system, and forms a closed-loop control. It needs to be further explained that: 1. Storage Unit: Employs non-volatile memory chips, supporting data retention even after power loss. Data is stored in functional partitions to ensure the security and traceability of parameters and logs. System firmware area: Stores the core firmware programs required for the device to run, and supports upgrades via USB port; Scene parameter area: Stores image quality parameter templates and audio parameter templates for various scenarios such as medical images, rail transit monitoring, and industrial control interfaces, such as volume, gain, and linkage rules, such as alarm methods in case of faults; User configuration area: Stores personalized parameters such as brightness, contrast, and volume that are manually adjusted by the user, and supports switching between multiple user configurations; Alarm Log Area: Records fault information such as ESD protection alarms, synchronization anomalies, and audio anomalies, including key data such as alarm time, fault type, triggering module, and handling measures. The log storage capacity is ≥1000 entries, and the oldest record will be automatically overwritten when the log is full. 2. Instruction Processing Unit: As the core of instruction parsing, it supports the input and standardized conversion of multiple instruction types. Receive IR / KEY control commands: parse infrared remote control signals, 38kHz carrier frequency signals, or physical button trigger signals, and convert them into brightness +5%; switch medical scenes and other standard control commands; Receive industrial equipment signals: parse Modbus / Profinet protocol signals transmitted through the linkage port of industrial equipment, extract equipment operating status, normal / fault / threshold trigger, key parameters, such as rail transit speed, industrial equipment temperature, etc. Receive module alarm signals: Receive fault alarm signals sent by ESD protection module, differential receiving module, synchronization separation module, etc., and extract information such as alarm type and fault level; After instruction processing, standardized control signals are output and transmitted to the corresponding execution module via the I2C / SPI communication bus, while the instruction execution status is recorded. 3. Intelligent Linkage Control Unit for Industrial Scenarios: Its core is a scenario-based linkage decision engine with a built-in multi-scenario linkage rule base, enabling automated responses from signal input to decision output to module linkage. Fault linkage rules: When industrial equipment sends a fault signal, the following linkage actions are automatically triggered: the display module highlights the alarm icon, the audio module plays a high-decibel alarm sound, the fault log is recorded, and the fault is reported to the industrial control system. State adaptation rules: When industrial equipment is running at high speed, such as rail transit, automatically switch the monitoring scene image quality template + audio module noise reduction mode; when the equipment is in standby, switch to low power image quality template + audio mute. Threshold triggering rule: When the industrial sensor detects a parameter that exceeds the threshold, such as when the industrial control temperature is ≥80℃, the parameter value of the display module is automatically amplified and the audio module is activated to issue a loop alarm until the parameter returns to normal. 5. Alarm Feedback Unit: Responsible for multi-channel output and closed-loop feedback of fault alarms. Local alarms: The linkage display module pops up an alarm window, including the fault type, handling suggestions, and the audio module plays a voice / beep alarm; Remote feedback: Sends fault signals to external industrial control systems, such as PLCs and industrial host computers, through the industrial equipment linkage port, supports Modbus protocol, and provides feedback on fault type and device operating status; Alarm clearing: After receiving the fault recovery signal from the execution module, the local alarm is automatically closed, feedback of fault clearing is sent to the industrial control system, and the alarm log status is updated.

[0070] The module uses command-driven operation combined with status feedback as its core for collaboration. It works in deep integration with the display module, audio processing module, ESD protection module, and external industrial equipment to achieve global coordinated control. The specific collaboration steps are as follows: Step 1: Initialize Coordination and Load Parameters After the system starts up, the control module establishes connections with each associated module through the communication bus and completes the initial configuration: Send a parameter loading instruction to the storage unit, retrieve the default scene template, such as industrial control scene, user historical configuration parameters and linkage rules, and send them to the display module, audio processing module and image decoding driver module respectively to complete the initial parameter configuration of each module; Send status query commands to the ESD protection module, differential receiving module, and synchronization separation module; receive self-test status signals from each module (normal / abnormal); if a module abnormality is detected, immediately activate local alarms, display module prompts indicating module failure, short beep of the audio module, and record initialization logs. It sends a ready signal to external industrial equipment, receives the initial operating status (normal / standby) from the industrial equipment, and adapts the corresponding operating parameters according to the status.

[0071] Step 2: Coordinated command reception, parsing, and execution Three categories of instructions are processed collaboratively based on their type to ensure accurate instruction execution: User manual command IR / KEY: Users can send commands via infrared remote control or physical buttons, such as switching medical imaging scenes or increasing volume by 10dB. After parsing the instruction, the instruction processing unit sends a signal to the display module to load the medical image quality template and a signal to the audio processing module to increase the volume by 10dB. After the display module and audio processing module execute, they will send a signal indicating that the parameters have been successfully updated. The control module will store the updated parameters in the user configuration area to ensure that they are automatically loaded on the next startup.

[0072] Industrial equipment status signals: External industrial equipment, such as rail transit PLCs, sends operating status signals, such as braking status and fault alarms. After the intelligent linkage control unit in the industrial scenario analyzes the signal, it triggers the fault linkage rules: it sends an instruction to the display module to highlight the red alarm icon and enlarge the fault data, an instruction to the audio module to play an 80dB alarm sound, and an instruction to the alarm feedback unit to report the fault to the industrial control system. Each execution module sends a signal indicating that the linkage is complete after execution, and the control module records a fault log, including alarm time, fault type, and braking fault.

[0073] Module alarm signals: The ESD protection module detected severe electrostatic interference and sent an RGB port-severe interference-protection normal alarm signal. After parsing the instruction, the instruction processing unit sends an instruction to the differential receiving module to reduce the signal transmission gain by 50%, and sends a local light alarm instruction to the alarm feedback unit. After the differential receiving module completes the feedback gain adjustment, the display module pops up a message indicating that electrostatic interference has been protected, and the audio module beeps once. After the interference subsides, the ESD protection module sends a signal indicating that the interference has been cleared, and the control module instructs the differential receiving module to restore the gain and turn off the alarm.

[0074] Step 3: Scene switching and collaborative adaptation When the status of industrial equipment changes or a user triggers a scene switch, multi-module collaborative adaptation is initiated: Triggering conditions: Industrial equipment switches from normal operation to maintenance mode, or the user sends a command to switch industrial control scenarios via IR / KEY; The industrial scene intelligent linkage control unit of the control module retrieves the corresponding scene linkage rules and issues switching instructions to each module: Send a command to the image decoding driver module to switch the industrial control image quality driving mode; Send a command to the display module to load an industrial control image quality template with high contrast and highlighted data; Send a command to the audio processing module to switch the industrial alarm audio mode and enhance the low-frequency alarm sound; Each module performs the switching operation synchronously within 100ms and sends back a signal indicating successful switching. The control module sends a signal to the external industrial equipment that the scene adaptation is complete, and at the same time stores the current scene parameters in the scene parameter area, forming a closed loop.

[0075] Step 4: Collaboration of Fault Handling and Closed-Loop Feedback When any module or industrial equipment malfunctions, a full-process closed-loop fault handling process is initiated: Fault triggering: The synchronization separation module detects a timing deviation exceeding the limit by more than 100ns and sends an alarm signal for synchronization abnormality. Command processing: The control module analyzes the alarm signal, determines the fault level to be medium, and initiates fault linkage: Send a recalibration command to the synchronization separation module and a command to increase the noise suppression strength to the differential receiving module; Send a pop-up notification to the display module indicating a synchronization error - calibration in progress, and send a command to the audio module to beep twice. Send a feedback signal indicating synchronization anomaly in progress to the industrial control system; Fault recovery: After the synchronization separation module is recalibrated, it sends signals with normal timing. Closed-loop feedback: The control module disables local alarms, sends a fault clearance signal to the industrial control system, and updates the alarm log to indicate that it has been recovered; if calibration fails and fails to meet the standard after 3 consecutive calibrations, it is upgraded to an advanced fault, triggering continuous alarms from the display module + cyclic alarms from the audio module + sending an emergency fault signal to the industrial control system, while recording detailed fault data for troubleshooting.

[0076] Step 5: Collaboration between parameter update and persistence Supports manual parameter updates by users or synchronized updates by industrial equipment, ensuring parameter persistence: Parameter update: Users can adjust the brightness of the display module via IR / KEY, from 300cd / ㎡ to 400cd / ㎡, or industrial equipment can send a linkage signal to increase the brightness by 20%; After receiving the adjustment command, the control module sends a signal to the display module to adjust the brightness to 400 cd / m². After the display module executes the update, it reports that the brightness update is complete. The control module then stores the new brightness parameters in the user configuration area. If the user chooses to save it as a custom template, the parameter will be bound to the current scene and stored in the scene parameter area, and will be automatically loaded the next time the scene is called; at the same time, a signal indicating that the parameter has been successfully updated will be sent to the industrial equipment to achieve parameter synchronization.

[0077] The control module follows the core logic of multi-source access – intelligent decision-making – global linkage – closed-loop feedback, and its core advantages are reflected in intelligent linkage and high-reliability control: At the level of intelligent linkage: Through the built-in scene linkage rule library, the status of industrial equipment and the operating parameters of the device can be automatically adapted, and scene switching and fault response can be completed without manual intervention, breaking through the limitations of the traditional control module's passive execution of instructions; High reliability control level: Through multi-module status feedback, fault closed-loop processing, and persistent parameter storage, it ensures accurate command execution, fault traceability, and recovery of operation. At the same time, it supports dual mechanisms of local alarm and remote feedback to meet the stringent operation and maintenance requirements of industrial scenarios. The entire operation aims for global coordination, intelligent response, and stability and reliability. Through collaborative decision-making among units and deep cross-module linkage, it becomes the brain and central hub of the device, ensuring the orderly operation of all functional modules and precise adaptation to scenario requirements, fully meeting the intelligent and reliability requirements of professional fields such as rail transit, industrial control, and medical imaging.

[0078] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0079] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A differential VGA signal decoding and display device, characterized in that: It includes a signal input module, an ESD protection module, a differential receiving module, a synchronization separation module, an image decoding and driving module, a display module, an audio processing module, and a control module. These modules are interconnected and work together to decode, process, and display differential VGA signals. The signal input module includes an RGB differential signal port, an IR / KEY control port, an audio input port, a USB input port, and an industrial equipment linkage port; The ESD protection module is located between the signal input port and the subsequent processing module. It is used for electrostatic protection and has protection status monitoring and alarm functions. The differential receiving module receives RGB differential signals, restores them to single-ended RGB signals, and has adaptive noise suppression capabilities. The synchronization separation module separates the line and field synchronization signals from the composite signal and has a timing deviation compensation function. The image decoding driver module receives video-related signals, optimizes and drives the display module, and has a dynamic resolution adaptation function. The display module has a dynamic image quality enhancement function to adapt to the display needs of different professional scenarios; The audio processing module decodes, amplifies, and outputs audio signals, and also has an audio-video synchronization delay calibration function. The control module receives control commands and industrial equipment signals, adjusts system operating parameters, and has intelligent linkage functions.

2. The differential VGA signal decoding and display device according to claim 1, characterized in that: The USB input port of the signal input module works in conjunction with the image decoding driver module. After the image decoding driver module parses the audio and video files in the USB storage medium, it synchronously calls the display module to display the video, the audio processing module to output the audio, and the linkage control module to record the playback progress and parameter settings, so as to realize the synchronous playback of multiple media files.

3. The differential VGA signal decoding and display device according to claim 2, characterized in that: The differential receiving module adopts a multi-channel differential-to-single-ended receiving structure, working in conjunction with the ESD protection module and the image decoding driver module. It first receives the RGB differential signal through electrostatic protection, and then uses adaptive common-mode noise suppression technology to dynamically adjust the noise suppression threshold according to the intensity of environmental interference, accurately restoring the single-ended RGB signal and providing a low-noise, high-fidelity basic signal for the image decoding driver module.

4. The differential VGA signal decoding and display device according to claim 3, characterized in that: The synchronization separation module includes an operational amplifier unit, a synchronization extraction circuit, and a synchronization signal fault tolerance calibration unit, which work in conjunction with the differential receiving module and the image decoding driving module. The operational amplifier unit optimizes the amplitude of the composite signal and filters interference, the synchronization extraction circuit separates the horizontal and vertical synchronization signals, and the fault tolerance calibration unit automatically compensates for timing deviations to ensure that the synchronization signal and the image signal are accurately matched in timing, thus avoiding screen tearing and misalignment.

5. A differential VGA signal decoding and display device according to claim 4, characterized in that: The image decoding driver module integrates a signal decoding unit, a display driver unit, an automatic tuning unit, and a dynamic resolution intelligent adaptation unit, and works in conjunction with the differential receiving module, the synchronization separation module, and the display module. The automatic tuning unit optimizes the signal through coordinated operations such as phase calibration and positioning adjustment. The dynamic resolution intelligent adaptation unit automatically identifies the input signal resolution, standard definition to 4K, and adapts and switches the display driver mode accordingly. At the same time, it links with the image quality dynamic enhancement unit of the display module to optimize the display parameters for different scenarios.

6. A differential VGA signal decoding and display device according to claim 5, characterized in that: The ESD protection module works in conjunction with the control module and differential receiving module to monitor the electrostatic interference intensity and its own operating status in real time. When the interference exceeds the standard or is abnormal, it sends an alarm signal to the control module. At the same time, it links the differential receiving module to reduce the signal transmission gain to prevent electrostatic breakdown of core components. The control module records the protection status log.

7. A differential VGA signal decoding and display device according to claim 6, characterized in that: The display module's dynamic image enhancement unit works in conjunction with the control module to allow users to preset image quality parameter templates for different professional scenarios via the IR / KEY control port or industrial equipment linkage port. After the image decoding driver module identifies the signal scene type, it automatically calls the corresponding template. The template parameters can be modified and stored in real time through the control module, adapting to the personalized image quality needs of multiple scenarios such as medical imaging, rail transit monitoring, and industrial control interfaces.

8. A differential VGA signal decoding and display device according to claim 7, characterized in that: The audio processing module includes an audio decoding unit, a power amplification unit, and an audio delay intelligent calibration unit, which work in conjunction with the image decoding driving module. The audio delay intelligent calibration unit detects the video signal transmission delay in real time and automatically adjusts the audio output delay to ensure that the audio and video synchronization error is less than 10ms, thereby achieving accurate audio and video synchronization output.

9. A differential VGA signal decoding and display device according to claim 8, characterized in that: The control module includes a storage unit, an instruction processing unit, and an industrial scene intelligent linkage control unit, which works in conjunction with the display module, audio processing module, ESD protection module, and external industrial equipment. The industrial scene intelligent linkage control unit receives operating status signals from industrial equipment, automatically adjusts display parameters and audio output status, and triggers scene-based alarms. At the same time, it receives alarm signals from the ESD protection module, feeds back fault information to the industrial control system, and forms a closed-loop control.

Images