High-definition video docking station and its integrated system

Abstract

This utility model discloses a high-definition video expansion dock device and its integrated system. The device includes a main control module, a protocol conversion module, a power management module, a video processing module, a dynamic bandwidth allocation unit, multiple video output interfaces, and a peripheral expansion unit. The main control module receives input video signals and performs splitting, compression, and protocol parsing; the protocol conversion module manages interface protocol switching, device detection, and power supply negotiation; the power management module converts the input voltage into multi-level system voltages and provides reverse charging functionality; the video processing module splits the input video signal into multiple independent video streams and reduces bandwidth; the dynamic bandwidth allocation unit dynamically adjusts the resolution or refresh rate of the video streams; and the peripheral expansion unit connects to low-speed peripherals through independent data channels. This device supports three-channel 4K@60Hz simultaneous output, features high energy efficiency, intelligent bandwidth management, and good compatibility, and is suitable for multi-screen collaboration, industrial control, and high-resolution display applications.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment, and in particular to a high-definition video docking station and its integrated system. Background Technology

[0002] Currently, docking station products on the market have significant shortcomings in multi-screen high-definition video output. Traditional multi-screen solutions mainly rely on the Thunderbolt protocol, which is not only costly but also has poor compatibility, limiting device selection and widespread adoption. Furthermore, existing docking station technologies employ separate designs for signal processing and protocol management modules, resulting in high system complexity and power consumption, impacting device portability and energy efficiency.

[0003] While the Type-C interface offers high bandwidth, it remains insufficient for multi-channel 4K video output. Existing docking stations typically support only one or two 4K displays and rely on external GPUs or Thunderbolt interfaces, further increasing cost and complexity and limiting application scenarios. Furthermore, existing docking stations suffer from complex power management and are susceptible to signal interference, affecting the stability and quality of video transmission.

[0004] Therefore, existing docking station technologies are inadequate in terms of multi-screen high-definition display support, cost control, compatibility, power consumption management, signal integrity, and power management, making it difficult to meet the growing needs of users. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a high-definition video extension dock device and its integrated system. By coordinating and optimizing multiple key modules such as the main control module, protocol conversion module, power management module, and video processing module, it achieves efficient and stable high-definition video multi-screen extension output.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-definition video docking station device, comprising:

[0008] The main control module is used to receive input video signals and control signal splitting, compression, and protocol parsing.

[0009] The protocol conversion module connects to multiple video output interfaces and is used to manage interface protocol switching, device detection, and power supply negotiation.

[0010] The power management module is used to convert the input voltage into a multi-level system voltage and provide reverse charging for external devices;

[0011] The video processing module is used to split the input video signal into multiple independent video streams and reduce the bandwidth of a single stream through compression technology;

[0012] The dynamic bandwidth allocation unit is used to dynamically adjust the resolution or refresh rate of the video stream according to the bandwidth requirements of each video output interface.

[0013] Multiple video output interfaces are connected to the main control module via a protocol conversion module, supporting high-resolution video transmission;

[0014] The peripheral expansion unit connects to low-speed peripherals via an independent data channel and is physically isolated from the video transmission channel.

[0015] The main control module and the protocol conversion module are connected via a high-speed data transmission channel to transmit processed video signals. The protocol conversion module feeds back to the main control module based on the detected device type, dynamically adjusting the interface protocol and power supply strategy. The power management module provides tiered voltages to each module and works with the protocol conversion module to manage reverse charging. The video processing module receives instructions from the main control module and performs signal splitting and bandwidth compression. The dynamic bandwidth allocation unit reads the EDID information of the display and feeds it back to the main control module. The peripheral expansion unit interacts with the main control module through control signals and independently manages low-speed peripheral connections.

[0016] As a preferred embodiment: the main control module includes an LT8713 chip; the protocol conversion module includes an LT8711 chip; and the high-speed data transmission channel is a DHTXx_DxP / N differential pair.

[0017] As a preferred embodiment, the LT8713 chip controls the 2-lane / 4-lane switching of the signal channel through the GPIO12 pin, and implements the forward / reverse insertion detection logic through the GPIO27 pin. The DSC compression parameters are configured through the I2C bus (CSDA / CSCL).

[0018] As a preferred option, the LT8711 chip detects the device type via the CC1 / CC2 pins and manages the reverse charging voltage output via the VBUS pin, supporting a maximum power supply of 20V / 5A.

[0019] As a preferred embodiment, the power management module includes a SY6818PLC chip and a SY8105IADC chip, which are used to generate 5V_SYS and 3.3V voltages, respectively. The impedance of the VBUS power path is designed to be less than 50mΩ and is routed separately from the signal lines.

[0020] As a preferred embodiment: the peripheral expansion unit is a USB 2.0 HUB, which connects to peripherals via USB_D_DP / USB_D_DN differential pairs, and the HUB reset signal is driven by the control signal pin of the main control module.

[0021] As a preferred embodiment: the LT8713 chip is connected to the LT8711 chip via differential pairs DHTX0_D0P / N to DHTX2_D3P / N for transmitting compressed video streams; the GPIO12 / GPIO27 pins of the LT8713 chip are connected to the POL / HPD pins of the LT8711 chip to control signal channel switching and positive / negative insertion detection; the VBUS_CTRL pin of the LT8711 chip is connected to the SY6818 PLC chip of the power management module to achieve coordinated management of power supply and video transmission.

[0022] As a preferred embodiment: the video processing module includes an MST Hub unit and a DSC compression unit, wherein:

[0023] The MST Hub unit receives the input signal through the RX_D0P / N differential pair of the LT8713 chip and splits it into at least three independent video streams; the DSC compression unit configures the compression parameters through the SPI interface of the LT8713 chip to compress the bandwidth of each video stream; the compressed video stream is transmitted to the LT8711 chip through the DHTXx_DxP / N differential pair and output through the Type-C output interface.

[0024] An integrated system, including the aforementioned docking station, is characterized in that it further includes a temperature monitoring module, which dynamically adjusts the switching frequency of the power management module via a temperature sensor.

[0025] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution,

[0026] First, it supports simultaneous output of three 4K@60Hz channels: Through the combination of MST Hub technology and DSC compression technology, the total bandwidth is controlled at 24Gbps (after compression), lower than the 25.92Gbps limit of USB-C DP 1.4, meeting users' needs for multi-screen high-definition display. This allows users to simultaneously perform high-definition video playback, graphics processing, or office applications on three 4K resolution monitors, greatly improving work efficiency and user experience.

[0027] Secondly, its full-load power consumption is only 10.5W, a significant advantage compared to the average 15W of competing products. Simultaneously, its reverse charging efficiency reaches 92%, and voltage fluctuations are controlled within 5% when charging and video transmission are performed concurrently, improving energy utilization efficiency. This advantage not only reduces user costs but also helps reduce energy consumption, aligning with current environmental trends.

[0028] Third, the signal-to-noise ratio is improved by 20dB, and eye diagram jitter is less than 0.1UI, ensuring high-quality transmission of video signals. Furthermore, through layered cabling design and power management strategies, signal crosstalk and power consumption are effectively reduced, improving system stability and reliability. In multi-screen display environments, stable signal transmission avoids problems such as video stuttering and color deviation, ensuring users receive a smooth and clear visual experience.

[0029] Fourth, the dynamic bandwidth allocation unit can dynamically adjust video stream parameters based on real-time monitored EDID information, avoiding signal quality problems caused by bandwidth exceeding limits. The temperature monitoring module can automatically adjust power consumption under high load conditions, ensuring long-term stable operation of the device. These intelligent management functions improve the adaptability and reliability of the device, enabling it to work stably in various complex environments and extending the service life of the equipment.

[0030] Fifth, this utility model does not rely on the Thunderbolt protocol, reducing costs while improving compatibility. Through the Type-C interface and DisplayPort Alt Mode protocol, it can connect to a variety of devices, including but not limited to laptops, tablets, smartphones, and various monitors and projectors, meeting diverse user needs in different scenarios.

[0031] Sixth, the reversible insertion detection and hot-swapping functions make connecting devices more convenient for users, eliminating concerns about incorrect insertion or device damage caused by hot-swapping. Furthermore, the device's automatic identification and configuration functions for different devices further simplify the user's operation process and enhance ease of use.

[0032] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0033] Figure 1 This is a first-view perspective three-dimensional schematic diagram of the docking station device of this utility model;

[0034] Figure 2 This is a second-view perspective three-dimensional schematic diagram of the docking station device of this utility model;

[0035] Figure 3This is a third-view perspective three-dimensional schematic diagram of the docking station device of this utility model;

[0036] Figure 4 This is a schematic diagram of the docking station system architecture of this utility model;

[0037] Figure 5 This is a schematic diagram of the Type-C data input interface circuit of this utility model;

[0038] Figure 6 This is a schematic diagram of the main control module circuit connection of this utility model;

[0039] Figure 7 This is a schematic diagram of the first Type-C output interface circuit of this utility model;

[0040] Figure 8 This is a schematic diagram of the second Type-C output interface circuit of this utility model;

[0041] Figure 9 This is a schematic diagram of the third Type-C output interface circuit of this utility model;

[0042] Figure 10 This is a schematic diagram of the power input and protection circuit of this utility model;

[0043] Figure 11 This is a schematic diagram of the 5V output power management circuit of this utility model;

[0044] Figure 12 This is a schematic diagram of the high-current 5V output power supply circuit of this utility model;

[0045] Figure 13 This is a schematic diagram of the multi-channel power output circuit of this utility model;

[0046] Figure 14 This is a schematic diagram of the circuit connection of one of the protocol conversion modules of this utility model;

[0047] Figure 15 This is a schematic diagram of the circuit connection of another protocol conversion module of this utility model;

[0048] Figure 16 This is a schematic diagram of the circuit structure of the USB 2.0 HUB of this utility model.

[0049] Explanation of reference numerals in the attached diagram:

[0050] 10. USB 2.0 output interface; 20. TYPE-C output interface; 30. TYPE-C data input interface; 40. Type-C power input interface. Detailed Implementation

[0051] This utility model is as follows Figures 1 to 16 As shown, a high-definition video docking station and its integrated system include a main control module, a protocol conversion module, a power management module, a video processing module, a dynamic bandwidth allocation unit, multiple video output interfaces, and a peripheral expansion unit, wherein:

[0052] The main control module receives the input video signal and controls signal splitting, compression, and protocol parsing; it uses the LT8713 chip. The input signal is received via the RX_D0P / N differential pair and split into at least three independent video streams using MST Hub technology. Each stream is then processed by the DSC compression unit, applying a 3:1 compression ratio to reduce the single-channel bandwidth from 12.54Gbps to 8Gbps, thus meeting the bandwidth limitations of the USB-C DP 1.4 protocol. The compressed signal is output to the LT8711 chip via the DHTXx_DxP / N channel. The LT8713 chip also controls the 2-lane / 4-lane switching of the signal channel via the GPIO12 pin to adapt to different resolution transmission requirements; the GPIO27 pin is used to detect the orientation of the Type-C interface and configures the DSC compression parameters in real time via the SPI interface (SPI_MOSI / CK) to ensure signal quality.

[0053] The LT8713 chip, as the main control core, undertakes the critical task of video signal processing. The video signal is input from the RX_D0P / N differential pair and, after processing by MST Hub technology, is precisely split into three independent video streams. These three video streams then enter the DSC compression unit, where they are efficiently compressed at a preset 3:1 compression ratio, reducing the single-channel bandwidth from the original 12.54Gbps to 8Gbps, thus meeting the stringent bandwidth requirements of the USB-C DP1.4 protocol. The compressed video signal is then output sequentially to the LT8711 chip through the DHTXx_DxP / N channels, ensuring accurate transmission of the signal to the next processing stage.

[0054] In terms of control logic, the GPIO12 pin of the LT8713 chip is responsible for controlling the 2-lane / 4-lane switching of the signal channel. This function allows the device to flexibly adapt to display devices with different resolution and bandwidth requirements. When higher resolution video needs to be transmitted, it can switch to 4-lane mode to provide a higher data transmission rate. At the same time, the GPIO27 pin monitors the orientation of the Type-C interface in real time and automatically adjusts the data polarity through the POL signal, ensuring that the signal can be transmitted normally regardless of how the user inserts the Type-C interface, greatly improving the user experience.

[0055] Furthermore, the SPI interface (SPI_MOSI / CK) of the LT8713 chip plays a crucial role in the system, responsible for configuring the parameters of the DSC compression unit in real time. Based on different video content and display requirements, the SPI interface can dynamically adjust compression parameters to achieve the best balance between compression performance and video quality, ensuring users enjoy a clear and smooth video experience in various scenarios.

[0056] The protocol conversion module, connected to multiple video output interfaces, manages interface protocol switching, device detection, and power supply negotiation. The module consists of at least one LT8711 chip, connected to the Type-C input / output interface, and manages DisplayPort Alt Mode protocol switching, reversible insertion detection, and hot-plug signal (HPD) processing, among other functions. The LT8711 chip detects the type of connected device (monitor or charging device, etc.) via its CC1 / CC2 pins and manages the reverse charging voltage output via the VBUS pin, supporting a maximum power supply of 20V / 5A. The HPD signal feeds back connection status changes via the TXx_HPD pin, enabling the system to respond promptly to device insertion and removal operations. During reverse charging, the LT8711 chip prioritizes the power supply stability of the video transmission channel, ensuring normal video signal output.

[0057] The protocol conversion module based on the LT8711 chip is key to realizing the versatility of the Type-C interface. This chip accurately detects the type of connected device via the CC1 / CC2 pins, quickly identifying and adjusting the configuration of any device, whether it's a monitor, charging device, or other compatible device. The HPD signal (Hot Plug Detect) provides real-time feedback on connection status changes via the TXx_HPD pin. When a device is detected being inserted or removed, the LT8711 chip immediately notifies the main control module, allowing the system to respond promptly and reallocate resources, ensuring the continuity and stability of video output and power management.

[0058] In terms of power management, the VBUS_CTRL pin (TXx_VBUS_CTRL) of the LT8711 chip dynamically adjusts the output voltage according to device requirements, supporting multiple voltage outputs such as 5V, 9V, and 20V to meet the power supply requirements of different devices. Especially during reverse charging, the LT8711 chip intelligently prioritizes the power supply stability of the video transmission channel. For example, when a high-load monitor is connected and charging simultaneously, the chip automatically limits the charging current to ensure sufficient power supply to the video transmission module, preventing video signal interruption or quality degradation due to insufficient power, thus ensuring a normal user experience under multitasking.

[0059] The power management module converts the input voltage into multi-level system voltages and provides reverse charging for external devices. It employs a SY6818PLC chip and a SY8105IADC chip working together to convert the input 20V voltage into 5V_SYS, 3.3V, and 1.15V system voltages, providing stable power support for each module. Specifically, the SY6818PLC chip (circuit diagram U1 / U4) is responsible for converting the 20V input to 5V_SYS voltage, supporting a maximum output current of 5A; the SY8105IADC chip (circuit diagram U2) generates 3.3V voltage to power low-voltage components such as digital circuits. In the power path design, the impedance of the VBUS power path is carefully designed to be below 50mΩ and is routed separately from signal lines to reduce electromagnetic interference. Furthermore, a 2.2μH power inductor is used to filter switching noise, further improving power quality.

[0060] The SY6818 PLC chip (circuit diagram U1 / U4) receives the input 20V voltage and efficiently converts it to 5V_SYS voltage, supporting a maximum output current of 5A, providing power assurance for high-power modules and peripherals. The SY8105IADC chip (circuit diagram U2) is responsible for generating 3.3V voltage, mainly powering low-voltage components such as digital circuits, ensuring the normal operation of each module.

[0061] In terms of power path design, the impedance of the VBUS power path has been carefully optimized to below 50mΩ to reduce voltage drop and energy loss, and improve power supply efficiency. Meanwhile, power supply lines and signal lines are laid out in layers to avoid the impact of electromagnetic interference on signal transmission. In addition, a 2.2μH power inductor is included in the module to filter out high-frequency switching noise, further improving power quality and providing a solid power foundation for the stable operation of the device.

[0062] The video processing module is used to split the input video signal into multiple independent video streams and reduce the bandwidth of a single stream through compression technology. The video processing module includes an MST Hub unit and a DSC compression unit. The MST Hub unit is responsible for splitting the input video signal into at least three independent video streams to achieve multi-screen output. The DSC compression unit uses DSC technology to compress each video signal, reducing the bandwidth requirement of a single stream. In this invention, the DSC compression unit supports dynamic compression ratio adjustment, with a compression range of 2:1 to 3:1. The compression parameters can be configured in real time through the SPI interface of the LT8713 chip to adapt to different video content and display requirements, ensuring optimal video quality within limited bandwidth.

[0063] The dynamic bandwidth allocation unit is used to dynamically adjust the resolution or refresh rate of the video stream according to the bandwidth requirements of each video output interface. To ensure that the total bandwidth of the three 4K@60Hz signals does not exceed the 25.92Gbps limit of the USB-C DP1.4 protocol, this invention integrates a dynamic bandwidth allocation unit. This unit monitors the EDID information of each output interface to obtain parameters such as the display's resolution and refresh rate in real time, and dynamically adjusts the resolution or refresh rate of the video stream based on the current bandwidth usage. When bandwidth over-limit is detected, the LT8713 chip sends a control signal through the GPIO14 / GPIO15 pins to switch the resolution of at least one video stream from 4K@60Hz to 2K@120Hz, or reduce the color depth (e.g., from 10bit to 8bit), thereby optimizing bandwidth allocation and ensuring smooth video output.

[0064] The dynamic bandwidth allocation unit reads the display's EDID information in real time via the I2C bus (CSDA / CSCL) to obtain key parameters such as resolution, refresh rate, and color depth. The main control module (LT8713 chip) calculates the bandwidth requirement of a single video stream based on these parameters and accumulates the total bandwidth utilization of all channels, monitoring in real time whether it is approaching the upper limit of the USB-C DP1.4 protocol (25.92Gbps). When the total bandwidth exceeds a preset threshold (e.g., 24Gbps), a dynamic adjustment mechanism is triggered.

[0065] The priority adjustments are as follows: color depth compression (e.g., 10-bit → 8-bit) and resolution / refresh rate switching (e.g., 4K@60Hz → 2K@120Hz). Control signals are output through GPIO14 / GPIO15 pins, which, in conjunction with the protocol conversion module (LT8711 chip), enable parameter switching. Simultaneously, the compression ratio of the DSC compression unit is dynamically configured via the SPI interface (e.g., 3:1 → 2.5:1) to optimize bandwidth utilization. The hardware circuit design ensures low latency (<1ms) and high reliability, such as I2C bus impedance matching (90Ω ± 10%) and a push-pull GPIO driver structure.

[0066] After adjustment, the bandwidth utilization is recalculated. If it still exceeds the limit, secondary optimization is initiated (e.g., switching to another video stream). The system monitors signal quality via the TXx_VDET pin, switching to a redundant channel or triggering an alarm when an anomaly occurs. Furthermore, the power management module synchronously adjusts the power supply strategy (e.g., reducing power consumption of the corresponding channel after lowering the resolution), and dynamically adjusts the switching frequency in conjunction with temperature monitoring to achieve a synergistic improvement in energy efficiency and stability. Ultimately, this solution solves the bandwidth bottleneck and signal quality issues in multi-screen expansion through hardware-based real-time response and seamless user switching.

[0067] The multiple video output interfaces are connected to the main control module via a protocol conversion module, supporting high-resolution video transmission. The device is equipped with at least three Type-C output interfaces, each connected to the main control module via an LT8711 chip, supporting DisplayPort Alt Mode protocol transmission of compressed video signals and simultaneously supporting three channels of 4K@60Hz resolution output. In addition, a USB 2.0 hub unit is provided, connecting peripherals such as USB mice and keyboards via an independent low-speed data channel (USB_Z_HUB_N / P). This low-speed data channel is physically isolated from the high-speed video data channel, avoiding interference from peripheral data transmission to the video signal and ensuring the stability and integrity of video transmission.

[0068] The peripheral expansion unit is connected to low-speed peripherals through an independent data channel and is physically isolated from the video transmission channel.

[0069] The main control module and the protocol conversion module are connected through a high-speed data transmission channel to transmit the processed video signal. The protocol conversion module feeds back to the main control module based on the detected device type, dynamically adjusting the interface protocol and power supply strategy. The power management module provides graded voltages to each module and works with the protocol conversion module to manage reverse charging. The video processing module receives instructions from the main control module to perform signal splitting and bandwidth compression. The peripheral expansion unit interacts with the main control module through control signals and independently manages low-speed peripheral connections.

[0070] An integrated system includes the aforementioned docking station device. Additionally, the system includes a temperature monitoring module that monitors the operating temperature of the LT8713 chip in real time via a temperature sensor (circuit diagram U26). When the temperature exceeds a preset threshold, the system dynamically adjusts the switching frequency of the SY6818 PLC chip based on the temperature change, reducing power consumption and effectively controlling the chip temperature. This ensures stable operation of the device under high load conditions and extends the equipment's lifespan.

[0071] The connections between the modules and the working principle of the system are as follows:

[0072] Main Control Module and Protocol Conversion Module: The main control module (LT8713 chip) is connected to the protocol conversion module (LT8711 chip) via a high-speed data channel. The LT8713 chip splits and compresses the input video signal, then transmits the compressed video stream to the LT8711 chip via the DHTXx_DxP / N channel. The LT8711 chip is responsible for sending the received compressed video signal to an external display via the Type-C output interface. Simultaneously, the LT8713 chip interacts with the LT8711 chip via GPIO pins, such as controlling the 2-lane / 4-lane switching of the signal channel via GPIO12 pin, and implementing the orthogonal insertion detection logic via GPIO27 pin.

[0073] Main Control Module and Power Management Module: The power management module provides power support for the entire system. The 5V_SYS, 3.3V, and 1.15V system voltages generated by the SY6818PLC chip and SY8105IADC chip provide stable power to the main control module (LT8713 chip), protocol conversion module (LT8711 chip), and other components. The normal operation of the main control module depends on the stable voltage provided by the power management module. Simultaneously, the main control module influences the operating state of the power management module through control signals. For example, during reverse charging, the LT8713 and LT8711 chips work together to control the VBUS voltage output to prioritize the stability of power supply for video transmission.

[0074] Protocol Conversion Module and Power Management Module: The protocol conversion module (LT8711 chip) and the power management module are closely interconnected. The LT8711 chip manages the reverse charging voltage output through the VBUS pin, while the power management module is responsible for converting the input 20V voltage to the various voltage levels required by the system. During reverse charging, the LT8711 chip dynamically adjusts the output voltage according to device needs and, through coordinated work with the power management module, ensures the power supply priority of the video transmission channel, preventing video signal interruption or quality degradation due to insufficient power.

[0075] The video processing module and its connections to other modules: The video processing module (MST Hub unit and DSC compression unit) is closely connected to the main control module. The MST Hub unit receives the video signal transmitted from the main control module and splits it into three independent video streams; the DSC compression unit compresses the split video streams. The compressed video signal is transmitted through the main control module to the protocol conversion module, and then output to an external display via the Type-C interface. The parameter configuration of the video processing module (such as DSC compression parameters) is controlled by the main control module to ensure optimized video signal quality and bandwidth.

[0076] USB 2.0 Hub Unit and Host Module: The USB 2.0 Hub unit is connected to the host module via an independent low-speed data channel (USB_Z_HUB_N / P). The host module manages the data transmission between the USB 2.0 Hub unit and peripherals, avoiding interference from peripheral data transmission to the high-speed video data channel through the independent low-speed data channel. Simultaneously, the host module drives the Hub reset signal (Hub_Reset) via the GPIO23 pin to control and manage the USB 2.0 Hub unit.

[0077] The system architecture can be divided into two parts: data signal processing and power management. First, the Type-C data input receives raw signals (such as video or USB data) from the terminal device. These signals are then distributed via a USB 2.0 hub, converting the single input channel into a USB 2.0 output interface 10, enabling parallel connections of external devices (such as keyboards and storage devices). Simultaneously, some data is directly transmitted to an external display via the Type-C output interface 20, supporting high-definition video output and achieving lossless screen projection from the video expansion module.

[0078] Secondly, the power management module utilizes a 3.3V DC / DC and SY_DC / DC unit, with voltage conversion and stable power supply achieved via a Type-C power input interface 40. The LT8713 and LT8711 chips work together, each responsible for the allocation and protection of different power rails (such as PD protocol power supply or peripheral drive). This design ensures a stable power supply when expanding with multiple devices, while also supporting power transfer via the Type-C interface, meeting dynamic power adaptation requirements (such as parameter adjustment for cross-brand devices). The overall architecture, through the combination of signal expansion and efficient power management, achieves highly compatible, low-latency multi-device expansion capabilities.

[0079] System Working Principle: When the video signal enters the docking station through the Type-C data input interface 30, it is first parsed and preliminarily processed by the protocol conversion module (LT8711 chip). The LT8711 chip detects the device type through the CC1 / CC2 pins and provides feedback on the connection status via the HPD signal. Subsequently, the video signal is transmitted to the main control module (LT8713 chip). In the LT8713 chip, the video signal is split into three independent video streams by the MST Hub unit. Each video stream is then compressed by the DSC compression unit to reduce bandwidth requirements. The compressed video signal is transmitted back to the protocol conversion module (LT8711 chip) through the high-speed data channel, and finally sent to the external display through the Type-C output interface 20, achieving synchronous output of three 4K@60Hz video signals.

[0080] During signal transmission, the power management modules (SY6818PLC chip and SY8105IADC chip) provide stable power support to each module. The low impedance design and layered wiring of the VBUS power path effectively reduce electromagnetic interference and ensure the stability of signal transmission. Meanwhile, the dynamic bandwidth allocation unit monitors the EDID information and bandwidth usage of each output interface in real time. When the bandwidth is detected to be close to the upper limit, the resolution or color depth of the video stream is adjusted via the control pins of the LT8713 chip to optimize bandwidth allocation.

[0081] In addition, the temperature monitoring module monitors the operating temperature of the LT8713 chip in real time through a temperature sensor. When the temperature is too high, the system automatically adjusts the switching frequency of the power management module to reduce power consumption and ensure the stable operation of the device.

[0082] This invention features a meticulously layered circuit design to ensure the quality and stability of signal transmission. The high-speed video data channel employs a DP / USB 3.0 differential pair, with impedance strictly controlled within 100Ω ± 5%. This precise impedance matching effectively reduces signal reflection and attenuation, ensuring that high-speed video signals maintain good integrity even after long-distance transmission. These high-speed lines are arranged on independent PCB layers and maintained with sufficient spacing from power lines and other interference sources, thereby reducing the risk of crosstalk.

[0083] The low-speed USB channel uses a USB 2.0 differential pair with impedance controlled at 90Ω±10% to meet the transmission requirements of the USB 2.0 protocol. Through the Hub_Reset signal (GPIO23), the LT8713 chip can independently control the connection status of peripherals, achieving efficient management of them. The low-speed USB channel and the high-speed video channel are physically isolated from each other, avoiding potential interference from low-speed data transmission to high-speed video signals and ensuring the stability and quality of video output.

[0084] The dynamic bandwidth allocation algorithm is the core of this invention for intelligent video bandwidth management. The algorithm first reads the EDID information of the monitors via the I2C bus (CSDA / CSCL) to accurately obtain key parameters such as resolution and refresh rate for each monitor. During system operation, it monitors the bandwidth usage of each output channel in real time and calculates the total bandwidth utilization. When the total bandwidth is detected to be approaching the 25.92Gbps limit of the USB-C DP1.4 protocol, the algorithm automatically triggers the bandwidth optimization and adjustment mechanism.

[0085] Specifically, the system prioritizes reducing the color depth of a particular video stream, for example, compressing it from 10-bit to 8-bit. This adjustment effectively reduces data transmission volume and frees up bandwidth with minimal user notice. If adjusting the color depth is still insufficient, the system will further switch the resolution of the video streams, for example, switching one video stream from 4K@60Hz to 2K@120Hz. This dynamic adjustment strategy not only ensures smooth video output but also flexibly allocates bandwidth resources according to actual needs, optimizing overall system performance and ensuring users receive the best visual experience in multi-screen display scenarios.

[0086] To enhance system reliability and stability, this invention incorporates a robust anomaly handling mechanism. During signal transmission, the system monitors signal quality in real time via the TXx_VDET pin. Upon detecting signal loss or anomalies, such as signal interruption due to loose connections, interface damage, or electromagnetic interference, the system immediately activates its redundancy backup mechanism, automatically switching to the backup transmission channel. This process is fast and seamless, ensuring continuous video output and preventing work interruptions or data loss due to signal loss.

[0087] Meanwhile, the temperature monitoring module monitors the operating temperature of the LT8713 chip in real time via a temperature sensor (U26). When the chip temperature exceeds a preset safety threshold, such as 85°C, the system automatically reduces the switching frequency of the DC / DC converter, thereby reducing power consumption and preventing chip overheating and damage. This temperature protection mechanism effectively improves the reliability of the device under high load or high temperature environments, extends the service life of the equipment, and ensures that users can stably use the high-definition video docking station of this invention in various complex environments.

[0088] A communication method applied to the aforementioned high-definition video docking station includes the following steps:

[0089] S1. Receives input video signals and splits and compresses them through the main control module;

[0090] S2. Adapt the interface protocol through the protocol conversion module and output to multiple video output interfaces;

[0091] S3. Dynamically monitor bandwidth utilization and reduce the color depth or resolution of the video stream when it approaches the threshold.

[0092] S4. Independently manage low-speed peripheral connections through the peripheral expansion unit.

[0093] First, the main control module (LT8713 chip) receives video signals from external devices (such as laptops, tablets, etc.) through its input interface. This input interface can be a Type-C interface or other interface that supports video transmission. Next, the main control module splits and compresses the input video signal. Using MST (Multi-Stream Transport) technology, one input video signal is split into multiple independent video streams (three streams in this invention to meet the requirement of simultaneous output of three 4K@60Hz streams). Simultaneously, DSC (Display Stream Compression) technology is used to compress each video stream, reducing the bandwidth requirements of the video signal and enabling high-quality transmission within limited bandwidth.

[0094] The processed video signal is transmitted to the protocol conversion module (LT8711 chip) via a high-speed data transmission channel (such as DHTXx_DxP / N differential pairs) between the main control module and the protocol conversion module. The protocol conversion module is responsible for performing necessary protocol conversion and adaptation on the received video signal to meet the requirements of different video output interfaces. Then, the protocol conversion module outputs the processed video signal to external display devices (such as monitors, projectors, etc.) through multiple video output interfaces (such as Type-C output interfaces) to achieve multi-screen display functionality.

[0095] The peripheral expansion unit (USB 2.0 hub) connects to low-speed peripherals (such as USB mice and keyboards) via a dedicated data channel. This independent data channel is physically isolated from the high-speed video data channel, preventing interference from peripheral data transmission to the video signal. The main control module interacts with the peripheral expansion unit through control signals to manage and control the peripherals, enabling them to function properly and provide effective input to external devices.

[0096] During video transmission, the dynamic bandwidth allocation unit monitors the bandwidth usage of each video output interface in real time. By reading the display's EDID (Extended Display Identification Data) information, it obtains parameters such as the display's resolution and refresh rate, thereby accurately calculating the current bandwidth usage. When the detected bandwidth approaches the upper limit of the USB-C DP 1.4 protocol (25.92Gbps), the system automatically adjusts the video stream parameters, such as reducing the color depth (e.g., compressing from 10-bit to 8-bit) or switching the resolution (e.g., switching one video stream from 4K@60Hz to 2K@120Hz), to optimize bandwidth allocation and ensure smooth and stable video output.

[0097] The implementation of this communication method enables the docking station to support multi-screen display and peripheral connection while ensuring high-quality video signal transmission, meeting users' needs in different scenarios and improving the docking station's practicality and user experience.

[0098] Experimental Data and Performance Verification: In terms of performance testing, this invention achieved simultaneous output of three channels of 4K@60Hz, with the total bandwidth precisely controlled at 24Gbps (after compression), far below the 25.92Gbps limit of the USB-C DP 1.4 protocol. After 72 hours of continuous operation testing, there were no frame drops in the video output, and the color accuracy reached the high standard of Delta E<2, ensuring accurate reproduction of video content and high-quality visual effects. In the reverse charging efficiency test, with an input of 20V / 3A, the output efficiency of 5V / 3A reached as high as 92.3%. Even under the complex condition of simultaneous charging and video transmission, voltage fluctuations could still be strictly controlled within 5%, demonstrating the superior performance of this invention in energy management.

[0099] Interference immunity test results show that the jitter standard deviation of the eye diagram test is less than 0.05 UI, far exceeding the 0.15 UI required by the DP 1.4 standard, and the signal-to-noise ratio (SNR) is improved by 20 dB. These indicators fully demonstrate the excellent performance of this invention in ensuring signal integrity. In environmental adaptability tests, the device can maintain stable signal output without significant performance degradation within a wide temperature range of -40℃ to 85℃, demonstrating its reliability and stability in various harsh environments.

[0100] Energy efficiency comparison tests show that the full-load power consumption of this invention is only 10.5W, which is significantly lower than the average power consumption of 15W for competing products, demonstrating a remarkable energy-saving effect. This not only reduces user operating costs but also helps reduce energy consumption, aligning with current environmental protection trends. Furthermore, thanks to the exposed copper heat dissipation design on the back of the LT8713 chip, the chip temperature is reduced by 15℃, effectively improving the device's heat dissipation performance and further enhancing system stability and lifespan.

[0101] The key design feature of this utility model lies in, through...

[0102] First, three channels of 4K@60Hz are output simultaneously. To achieve simultaneous output of three 4K@60Hz video signals, this invention employs MST Hub technology and DSC compression technology. MST Hub technology accurately splits the input video signal into three independent video streams, ensuring that each signal can be independently transmitted to different displays. DSC compression technology efficiently compresses each video stream, reducing the bandwidth of a single stream from the original 12.54Gbps to 8Gbps, resulting in a total bandwidth of 24Gbps for the three video streams, lower than the 25.92Gbps limit of the USB-C DP 1.4 protocol. Through this combination of technologies, this invention achieves simultaneous output of three 4K@60Hz channels within a limited bandwidth, meeting users' needs for multi-screen high-definition display and providing strong support for multi-screen collaboration, professional graphics processing, and high-definition video editing applications.

[0103] Secondly, signal integrity is ensured; signal integrity is crucial in high-speed video signal transmission. This invention ensures signal transmission quality through layered wiring design and precise impedance control. The high-speed video data channel uses DP / USB 3.0 differential pairs, with impedance strictly controlled within 100Ω±5%, effectively reducing signal reflection and attenuation. Simultaneously, power supply lines and signal lines are laid out separately, with an impedance design below 50mΩ, avoiding the impact of electromagnetic interference on signal transmission. Furthermore, the use of a 2.2μH power inductor further filters out high-frequency switching noise, improving power quality and ensuring stable signal transmission. These design measures enable this invention to maintain high-quality video signal output even during long-distance transmission and in complex electromagnetic environments, avoiding signal quality issues such as video stuttering and pixelation.

[0104] Third, dynamic bandwidth allocation and optimization; Addressing the dynamic changes in bandwidth requirements in multi-screen display environments, this invention incorporates a dynamic bandwidth allocation unit. This unit monitors the EDID information of each output interface in real time to obtain parameters such as the monitor's resolution and refresh rate, and dynamically adjusts the resolution or refresh rate of the video streams based on the current bandwidth usage. When the bandwidth is detected to be approaching its limit, the system automatically reduces the color depth of one video stream (e.g., from 10-bit to 8-bit) or switches the resolution (e.g., from 4K@60Hz to 2K@120Hz) to optimize bandwidth allocation. This dynamic adjustment mechanism ensures stable transmission of all three video streams within the limited bandwidth, preventing signal loss or quality degradation due to bandwidth overruns, and providing users with a smooth multi-screen display experience.

[0105] Fourth, efficient power supply and thermal management; the power management module of this invention uses the SY6818PLC chip and SY8105IADC chip working together to convert the input 20V voltage into the various voltages required by the system, providing stable power support for each module. During reverse charging, the system can intelligently prioritize the power supply stability of the video transmission channel, avoiding video signal interruption or quality degradation due to insufficient power supply. Simultaneously, the temperature monitoring module monitors the operating temperature of the LT8713 chip in real time through a temperature sensor and dynamically adjusts the switching frequency of the power management module according to temperature changes, reducing power consumption and preventing chip overheating and damage. These power supply and thermal management measures not only improve the stability and reliability of the device but also extend its service life, ensuring that users can use this high-definition video docking station device stably for a long time in various environments.

[0106] Fifth, compatibility and ease of use design; this utility model fully considers compatibility and ease of use requirements. By adopting a Type-C interface and DisplayPort Alt Mode protocol, the device can connect to a variety of devices, including laptops, tablets, smartphones, and various monitors and projectors, without the need for additional adapters or complex settings. Reversible insertion detection and hot-swapping functions further simplify the user's operation process, enabling users to connect and switch devices more conveniently in actual use. At the same time, the device's automatic identification and configuration functions for different devices ensure that a stable and reliable connection can be quickly established in a multi-device environment, providing users with a seamless user experience.

[0107] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A high-definition video docking station device, comprising: include: The main control module is used to receive input video signals and control signal splitting, compression, and protocol parsing. The protocol conversion module connects to multiple video output interfaces and is used to manage interface protocol switching, device detection, and power supply negotiation. The power management module is used to convert the input voltage into a multi-level system voltage and provide reverse charging for external devices; The video processing module is used to split the input video signal into multiple independent video streams and reduce the bandwidth of a single stream through compression technology; The dynamic bandwidth allocation unit is used to dynamically adjust the resolution or refresh rate of the video stream according to the bandwidth requirements of each video output interface. Multiple video output interfaces are connected to the main control module via a protocol conversion module, supporting high-resolution video transmission; The peripheral expansion unit connects to low-speed peripherals via an independent data channel and is physically isolated from the video transmission channel. The main control module and the protocol conversion module are connected via a high-speed data transmission channel to transmit processed video signals. The protocol conversion module feeds back to the main control module based on the detected device type, dynamically adjusting the interface protocol and power supply strategy. The power management module provides tiered voltages to each module and works with the protocol conversion module to manage reverse charging. The video processing module receives instructions from the main control module and performs signal splitting and bandwidth compression. The dynamic bandwidth allocation unit reads the EDID information of the display and feeds it back to the main control module. The peripheral expansion unit interacts with the main control module through control signals and independently manages low-speed peripheral connections.

2. The high-definition video docking station device of claim 1, wherein: The main control module includes an LT8713 chip; the protocol conversion module includes an LT8711 chip; and the high-speed data transmission channel is a DHTXx_DxP / N differential pair.

3. The high-definition video docking station device of claim 2, wherein: The LT8713 chip controls the switching of the 2-lane / 4-lane signal channel through the GPIO12 pin, and implements the forward / reverse insertion detection logic through the GPIO27 pin. The DSC compression parameters are configured through the I2C bus.

4. The high-definition video docking station device of claim 2, wherein: The LT8711 chip detects the device type through the CC1 / CC2 pins and manages the reverse charging voltage output through the VBUS pin, supporting a maximum power supply of 20V / 5A.

5. The high-definition video docking station device of claim 1, wherein: The power management module includes a SY6818PLC chip and a SY8105IADC chip, which are used to generate 5V_SYS and 3.3V voltages, respectively. The impedance of the VBUS power path is designed to be less than 50mΩ and is laid out separately from the signal lines.

6. The apparatus of claim 1, wherein: The peripheral expansion unit is a USB 2.0 HUB, which connects to peripherals via USB_D_DP / USB_D_DN differential pairs, and the HUB reset signal is driven by the control signal pin of the main control module.

7. The apparatus of claim 2, wherein: The LT8713 chip is connected to the LT8711 chip via differential pairs DHTX0_D0P / N to DHTX2_D3P / N for transmitting compressed video streams; the GPIO12 / GPIO27 pins of the LT8713 chip are connected to the POL / HPD pins of the LT8711 chip to control signal channel switching and positive / negative insertion detection; the VBUS_CTRL pin of the LT8711 chip is connected to the SY6818 PLC chip of the power management module to realize coordinated management of power supply and video transmission.

8. The apparatus of claim 2, wherein: The video processing module includes an MST Hub unit and a DSC compression unit, wherein: The MST Hub unit receives the input signal through the RX_D0P / N differential pair of the LT8713 chip and splits it into at least three independent video streams; the DSC compression unit configures the compression parameters through the SPI interface of the LT8713 chip to compress the bandwidth of each video stream; the compressed video stream is transmitted to the LT8711 chip through the DHTXx_DxP / N differential pair and output through the Type-C output interface.

9. An integrated system comprising the docking station device of any one of claims 1-8, wherein, It also includes a temperature monitoring module, which dynamically adjusts the switching frequency of the power management module using a temperature sensor.

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