Automatic deployment curtain device and method for a tailgate of a vehicle

By integrating an automatic awning device built into the tailgate of the car, and combining multiple control units and sensors, the awning can be automatically deployed and retracted, solving the problems of space occupation, complicated operation and poor wind resistance of existing awning products, and improving the convenience and comfort of camping activities.

CN123025700APending Publication Date: 2026-11-03YIBIN COWIN AUTO CO LTD
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Patent Information

Application Number
CN202611101656.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-07-23
Publication Date
2026-11-03

AI Technical Summary

Technical Problem

Existing skylight products occupy a large amount of trunk space, are difficult to store and manage, are complicated to operate, have poor wind resistance, cannot be integrated with vehicles, have limited unfolding area, and cannot be automatically controlled, which affects the convenience and comfort of camping activities.

Method used

The system utilizes an automatic sunroof device built into the tailgate of the vehicle. Through the integration of a terminal module, a remote information service provider, an intelligent cockpit control unit, a network management module, a safety obstacle avoidance module, an electronic control unit, and the overall sunroof unit, it achieves one-button automatic deployment and retraction. Combined with radar detection, environmental perception, and lighting units, it enables intelligent interconnection and environmental adaptation.

Benefits of technology

It achieves zero space occupation, convenient operation, intelligent interconnection and spatial extension of the canopy, improves the automation level and comfort of camping activities, and reduces operational complexity and wind resistance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses an automatic unfolding curtain device of a car tail door, which comprises a terminal module, a remote information service provider, an intelligent cockpit control unit, a network management module, a safety obstacle avoidance module, an electronic control unit and a whole curtain unit; the terminal module is connected with the remote information service provider; the remote information service provider is connected with the intelligent cockpit control unit; the intelligent cockpit control unit is connected with the network management module; the network management module is connected with the safety obstacle avoidance module; the safety obstacle avoidance module is connected with the electronic control unit; and the electronic control unit is connected with the whole curtain unit. The application has the advantages that the curtain can be folded and unfolded by one key, and the cumbersome construction is completely eliminated; the curtain is completely built-in the tail door interlayer, and the storage space is not occupied; the appearance is traceless after the curtain is folded back, and the wind noise and wind resistance are completely eliminated; the whole device is intelligently linked with illumination and obstacle detection, and automatically adapts to the environment; the curtain is unfolded to form a semi-closed space with the tail door, and an integrated living space is formed.
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Description

Technical Field

[0001] This invention belongs to the field of automotive sunroof technology. Specifically, this invention relates to an automatic sunroof deployment device and method for automotive tailgates, used to achieve automated sunroof deployment. Background Technology

[0002] Current canopy products are primarily based on independent, portable structures. A complete kit typically includes over ten individual components, such as the canopy itself, multi-section support poles, guy lines, ground stakes, and matching lighting fixtures. Even when stowed, these components still occupy a significant amount of trunk space. For a mid-size SUV, a typical canopy kit can take up about one-third of the trunk depth, severely limiting the loading capacity for other camping supplies. More significantly, the multi-component system greatly increases the difficulty of storage and management. Users frequently encounter issues such as lost guy lines, missing ground stakes, or missing support pole joints, with incomplete components directly preventing the canopy from being properly erected. Furthermore, the lighting fixtures, as independent equipment, require separate storage and a separate backup power supply, further increasing the storage burden. This decentralized storage design does not consider the need for fixation and partitioning in a vehicle setting. Components colliding and rubbing against each other during vehicle movement can easily cause scratches on the canopy or damage to the pole coating, shortening the product's lifespan. Overall, the process of carrying and storing such sunroofs not only consumes users' extra time and energy for inventory and verification, but also cannot be effectively adapted to the existing storage system in the vehicle. It is a typical design scheme that sacrifices the overall space utilization efficiency for a single function.

[0003] Traditional canopy setups rely on a multi-step manual process. Users must sequentially complete steps such as ground deployment, pole connection, pole positioning, guy rope tensioning, and ground anchor fixing, averaging 15 to 20 minutes. The process demands precise timing and angle control. Inexperienced users often experience slack or unstable support due to uneven guy rope tension or incorrect ground anchor angles, requiring repeated adjustments. In windy conditions, a single person cannot simultaneously control multiple guy ropes and poles, drastically increasing the failure rate. In rainy conditions, the increased weight of the water-covered canopy can easily lead to structural collapse if the slope is not adjusted promptly. In low-light conditions, nighttime illumination relies solely on headlamps or flashlights, making it difficult to accurately determine the location of ground anchors and the distance between guy rope anchors, further extending setup time and increasing safety hazards. These operational hurdles result in extremely low responsiveness to sudden weather changes, often forcing users to abandon setups or interrupt their journeys. This process essentially relies on human effort to combat the natural environment, without introducing any mechanical assistance or rapid positioning mechanisms. As a result, the preparation and wrap-up phases of camping activities become the main source of physical exertion and psychological burden for users, severely undermining the inherent comfort of outdoor leisure.

[0004] Existing independent sunroofs are completely detached from the vehicle body in terms of spatial layout. After installation, they form an independent sheltered area with gaps between them and the vehicle body. This prevents a seamless physical connection from the interior of the vehicle to the area beneath the sunroof, forcing people to be exposed to the external environment for activities such as moving around and retrieving items, resulting in a lack of spatial continuity. Furthermore, this structure fails to utilize the vehicle body as a fixed anchor point, relying entirely on the friction between the ground stakes and the ground for wind resistance. This significantly reduces anchoring reliability on soft or hard paved surfaces. While some high-end models feature side tents or fixed sunshades that achieve a physical connection to the vehicle body, their external rigid shells significantly increase the vehicle's drag coefficient during driving, with measured increases in fuel or electricity consumption reaching 5% to 8% per 100 kilometers. In terms of appearance, they protrude from the vehicle's contours, disrupting the original vehicle's overall design. More importantly, these devices are mostly manually pull-out or flip-up structures with limited unfolding area, typically covering only a small area on one side of the vehicle, failing to meet the need for large-area lateral expansion. Their folding process also relies on manual operation, lacking electric drive and automatic tensioning mechanisms, making it prone to misalignment or jamming when the curtain is retracted. Existing solutions fail to address the core requirements of automated folding and rapid unfolding, and cannot dynamically adjust the shading range based on sunlight angle or wind direction, fundamentally limiting the practical value of vehicles as mobile living spaces and the improvement of user experience. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of the prior art and provide an automatic unfolding sunroof device and method for automobile tailgates, for realizing automated sunroof unfolding.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an automatic unfolding sunroof device for a car tailgate, comprising a terminal module 1, a remote information service provider (TSP), a smart cockpit control unit (SCCU), a network management module 2, a safety obstacle avoidance module 3, an electronic control unit (ECU), and a sunroof unit 4; the terminal module 1 is connected to the remote information service provider (TSP); the remote information service provider (TSP) is connected to the smart cockpit control unit (SCCU); the smart cockpit control unit (SCCU) is connected to the network management module 2; the network management module 2 is connected to the safety obstacle avoidance module 3; the safety obstacle avoidance module 3 is connected to the electronic control unit (ECU); and the electronic control unit (ECU) is connected to the sunroof unit 4.

[0007] Terminal module 1 sends control commands to the remote information service provider (TSP); the TSP sends camping mode commands to the intelligent cockpit control unit (SCCU); the SCCU transmits signal commands to network management module 2; network management module 2 sends operation commands to safety and obstacle avoidance module 3; the safety and obstacle avoidance module 3 detects the safety status and, if it meets the safety standards, sends operation commands to the electronic control unit (ECU); the ECU sends the canopy deployment command to the canopy unit 4.

[0008] Terminal module 1, remote information service provider (TSP), and intelligent cockpit control unit (SCCU) are connected by wireless signal communication; intelligent cockpit control unit (SCCU), network management module 2, safety obstacle avoidance module 3, electronic control unit (ECU), and overall canopy unit 4 are connected by controller area network (CAN bus).

[0009] Terminal module 1 includes the vehicle infotainment system and the mobile application (APP).

[0010] The safety obstacle avoidance module 3 includes a radar detector and a buzzer; the radar detector is located at the rear of the vehicle's tailgate; the buzzer alerts the driver to the distance between obstacles and the rear of the vehicle by sounding at different frequencies.

[0011] The overall canopy unit 4 includes the main canopy unit, intelligent drive unit, auxiliary support components, and environmental sensing and lighting unit.

[0012] The auxiliary support components include support rods; the environmental sensing and lighting unit includes solar panels, LED lights, and a light sensor; the light sensor detects the ambient light intensity.

[0013] The electronic control unit (ECU) automatically adjusts the brightness of the LED lights based on the light intensity detected by the light sensor.

[0014] A method for an automatic unfolding sunroof device for a car tailgate, the method comprising the following steps:

[0015] S1: Terminal module 1 receives the user's command to open the camping mode - canopy;

[0016] S2: The Smart Cockpit Control Unit (SCCU) determines whether the car is in park or whether the handbrake is engaged. If the car is in park or the handbrake is engaged, proceed to the next step.

[0017] S3: The intelligent cockpit control unit (SCCU) calls the vehicle tailgate safety obstacle avoidance module 3 to detect whether there are obstacles in the preset areas behind and to the sides;

[0018] S4: If there are no obstacles, control the drive motor in the intelligent drive unit to rotate in the forward direction, driving the roll-up shaft to release the main body of the canopy until it is fully unfolded;

[0019] S5: After the main body of the canopy is unfolded, the user must manually install the support rods in the auxiliary support assembly to complete the fixation;

[0020] S6: In camping mode, the light sensor in the environmental perception and lighting unit collects the ambient light intensity in real time, and the electronic control unit (ECU) automatically adjusts the intensity of the lighting based on the collected ambient light intensity data.

[0021] S7: When terminal module 1 receives the camping mode - canopy closing command input by the user, it transmits the command to the electronic control unit (ECU). The ECU first controls the lights to turn off, and then controls the drive motor to rotate in the opposite direction, automatically retracting the main body of the canopy.

[0022] The technical advantages of this invention are as follows: Extreme Convenience: The sunroof can be automatically deployed and retracted via a one-click in-vehicle system or mobile app, completely changing the traditional time-consuming and complex setup process and significantly improving efficiency; Zero Space Occupancy: The sunroof system is completely integrated into the original structure of the tailgate, without occupying any storage space in the trunk or inside the vehicle, solving the problems of carrying and storing outdoor equipment in a disorganized manner; Complete Appearance: When the sunroof is fully retracted, all components are hidden inside the tailgate, making the vehicle's appearance indistinguishable from a regular vehicle, avoiding the wind noise, wind resistance, and unsightly appearance issues associated with externally mounted equipment; Intelligent Connectivity: Through deep integration with the vehicle's electrical architecture, functions such as adaptive lighting and obstacle detection are achieved, enhancing the level of intelligence and automation in camping scenarios; Spatial Expansion: When the sunroof is deployed, it forms a continuous semi-enclosed space with the tailgate open, effectively expanding the vehicle's usage scenarios and creating an integrated outdoor living space. Attached Figure Description

[0023] This manual includes the following figures, which illustrate the following:

[0024] Figure 1 This is a system structure block diagram of the present invention;

[0025] Figure 2 This is a flowchart of the method of the present invention;

[0026] The following are labeled in the diagram: 1. Terminal module; 2. Network management module; 3. Safety obstacle avoidance module; 4. Overall canopy unit. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0028] An automatic unfolding sunroof device for a car tailgate includes a terminal module 1, a telematics service provider (TSP), a smart cockpit control unit (SCCU), a network management module 2, a safety obstacle avoidance module 3, an electronic control unit (ECU), and an overall sunroof unit 4. The terminal module 1 is connected to the TSP; the TSP is connected to the SCCU; the SCCU is connected to the network management module 2; the network management module 2 is connected to the safety obstacle avoidance module 3; the safety obstacle avoidance module 3 is connected to the ECU; and the ECU is connected to the overall sunroof unit 4.

[0029] Terminal module 1 sends control commands to the remote information service provider (TSP); the TSP sends camping mode commands to the intelligent cockpit control unit (SCCU); the SCCU transmits signal commands to network management module 2; network management module 2 sends operation commands to safety and obstacle avoidance module 3; the safety and obstacle avoidance module 3 detects the safety status and, if it meets the safety standards, sends operation commands to the electronic control unit (ECU); the ECU sends the canopy deployment command to the canopy unit 4.

[0030] Terminal module 1, remote information service provider (TSP), and intelligent cockpit control unit (SCCU) are connected by wireless signal communication; intelligent cockpit control unit (SCCU), network management module 2, safety obstacle avoidance module 3, electronic control unit (ECU), and overall canopy unit 4 are connected by controller area network (CAN bus).

[0031] After the user initiates the Camping Mode - Canopy Opening command on Terminal Module 1, Terminal Module 1 immediately generates a corresponding control request and sends the control request for the entire canopy unit 4 to the Remote Information Service Provider (TSP) platform via a remote communication link. Upon receiving the control request, the TSP platform first verifies the request's validity, confirming the request source and command format are correct. Then, based on the request content, it generates two command data sets: the first is a wake-up command to activate the Smart Cockpit Control Unit (SCCU), and the second is the specific execution command for Camping Mode - Canopy Opening. Both command data sets are then sent to the Smart Cockpit Control Unit (SCCU) on the vehicle side. After receiving instruction data from the Telematics Service Provider (TSP) platform, the Smart Cockpit Control Unit (SCCU) executes a wake-up process, transitioning from low-power or standby mode to normal operation. Upon wake-up, the SCCU parses and encapsulates the received Camping Mode - Canopy Opening instruction data, converting it into a CAN bus signal conforming to the Controller Area Network (CAN) 2.0A protocol. This signal contains the opcode corresponding to the original instruction and the target unit identifier. The SCCU then sends this CAN bus signal to the Network Management Module 2 via the vehicle's internal CAN bus network. Upon receiving the CAN bus signal, the Network Management Module 2 performs routing and forwarding processing. Based on the target address or message identifier in the signal, it forwards the CAN bus signal corresponding to the Camping Mode - Canopy Opening instruction data to the Safety and Obstacle Avoidance Module 3. The Safety and Obstacle Avoidance Module 3 receives the CAN bus signal and performs internal safety logic checks, such as verifying the current canopy status, vehicle speed, and surrounding obstacle detection results to ensure the opening conditions are met. After passing the safety verification, the CAN bus signal is forwarded to the Electronic Control Unit (ECU). After receiving the CAN bus signal, the Electronic Control Unit (ECU) decodes the signal and parses the instructions. Based on the parsing results, it generates the corresponding drive control signal and outputs it to the actuator of the canopy unit 4. Upon receiving the control signal, the canopy unit 4 executes the corresponding action, drives the canopy to unfold, and continuously monitors the canopy position feedback until it reaches the fully open state, thus realizing the normal use of the canopy.

[0032] The entire process involves feedback steps, and there is a feedback relationship between each module. When the next module completes the instruction sent by the previous module, it will send the operation result back to the previous module until the operation is successfully reported to the terminal module 1 to inform the user.

[0033] When a user needs to close the canopy, they initiate the Camping Mode - Canopy Closure command on terminal module 1. Terminal module 1 then generates a corresponding control request and sends the control request for the entire canopy unit 4 to the Telecommunication Service Provider (TSP) platform via a remote communication link. Upon receiving the control request, the TSP platform first verifies the validity of the request, confirming that the request source and command format are correct. Then, based on the request content, it generates two command data sets: the first is a wake-up command to activate the Smart Cockpit Control Unit (SCCU), and the second is the specific execution command for Camping Mode - Canopy Closure. Both command data sets are then sent to the Smart Cockpit Control Unit (SCCU) on the vehicle side. After receiving instruction data from the 4TSP platform of the panoramic sunroof unit, the Smart Cockpit Control Unit (SCCU) executes a wake-up process, transitioning itself from low-power or standby mode to normal operation. Upon wake-up, it parses and encapsulates the received camping mode - panoramic sunroof closing instruction data, converting it into a CAN bus signal conforming to the Controller Area Network (CAN) 2.0A protocol format. This signal contains the opcode corresponding to the original instruction and the target unit identifier. The SCCU then sends this CAN bus signal to the network management module 2 via the vehicle's internal CAN bus network. Upon receiving the CAN bus signal, the network management module 2 performs routing and forwarding processing. Based on the target address or message identifier in the signal, it forwards the CAN bus signal corresponding to the camping mode - panoramic sunroof closing instruction data to the safety and obstacle avoidance module 3. The safety and obstacle avoidance module 3 receives the CAN bus signal and performs internal safety logic checks, such as confirming whether the current state of the panoramic sunroof, vehicle speed, and surrounding obstacle detection results meet the closing conditions. After passing the safety verification, it forwards the CAN bus signal to the electronic control unit (ECU). After receiving the CAN bus signal, the Electronic Control Unit (ECU) decodes the signal and parses the instructions. Based on the parsing results, it generates the corresponding drive control signal and outputs it to the actuator of the canopy unit 4. The canopy unit 4 executes the corresponding action according to the received control signal, driving the canopy to retract or close, and continuously monitors the canopy position feedback until it reaches a fully closed state, ultimately realizing the closing and retraction of the canopy.

[0034] Terminal module 1 includes the vehicle infotainment system and the mobile application (APP).

[0035] The safety obstacle avoidance module 3 includes a radar detector and a buzzer; the radar detector is located at the rear of the vehicle's tailgate; the buzzer alerts the driver to the distance between obstacles and the rear of the vehicle by sounding at different frequencies.

[0036] The obstacle avoidance module 3 includes a radar detector and a buzzer. The radar detector is located behind the tailgate of the vehicle. The buzzer alerts the driver to the distance between obstacles and the rear of the vehicle through different frequency beeps. When the user issues the start command for activating the camping mode - sunroof opening in the terminal module 1, the Smart Cockpit Control Unit (SCCU) receives the command and sends corresponding instructions to the obstacle avoidance module 3. The obstacle avoidance module 3 then executes the instructions. The radar detector uses a CA-IF1051S-Q1 bus transceiver chip. The obstacle avoidance module 3 employs ultrasonic ranging technology to detect the distance to obstacles behind the vehicle and alerts the driver to the distance between obstacles and the rear of the vehicle through different frequency beeps, thereby preventing the sunroof from failing to deploy due to a collision.

[0037] The overall canopy unit 4 includes the main canopy unit, intelligent drive unit, auxiliary support components, and environmental sensing and lighting unit.

[0038] The intelligent drive unit is connected to the electronic control unit (ECU). In response to the start command of the camping mode - canopy opening, it controls the output torque of the drive motor to drive the winding shaft to rotate, thereby realizing the automatic unfolding or retraction of the canopy.

[0039] The auxiliary support assembly includes a support rod; the auxiliary support assembly includes a detachable or foldable support rod, which is stored in a preset fixed position on the vehicle and is used to support the outer end of the canopy after it is unfolded.

[0040] The environmental sensing and lighting unit includes a solar panel, LED lights, and a light sensor; the light sensor detects the ambient light intensity. The environmental sensing and lighting unit is integrated into the outer horizontal bar or the main body of the canopy, and includes a solar panel, LED lights, and a light sensor. The light sensor detects the ambient light intensity, and the electronic control unit (ECU) automatically adjusts the brightness of the LED lights based on the detected signal.

[0041] The electronic control unit (ECU) automatically adjusts the brightness of the LED lights based on the light intensity detected by the light sensor.

[0042] A method for an automatic unfolding sunroof device for a car tailgate, the method comprising the following steps:

[0043] S1: Terminal module 1 receives the user's command to open the camping mode - canopy;

[0044] S2: The Smart Cockpit Control Unit (SCCU) determines whether the car is in park or whether the handbrake is engaged. If the car is in park or the handbrake is engaged, proceed to the next step.

[0045] S3: The intelligent cockpit control unit (SCCU) calls the vehicle tailgate safety obstacle avoidance module 3 to detect whether there are obstacles in the preset areas behind and to the sides;

[0046] S4: If there are no obstacles, control the drive motor in the intelligent drive unit to rotate in the forward direction, driving the roll-up shaft to release the main body of the canopy until it is fully unfolded;

[0047] S5: After the main body of the canopy is unfolded, the user must manually install the support rods in the auxiliary support assembly to complete the fixation;

[0048] S6: In camping mode, the light sensor in the environmental perception and lighting unit collects the ambient light intensity in real time, and the electronic control unit (ECU) automatically adjusts the intensity of the lighting based on the collected ambient light intensity data.

[0049] S7: When terminal module 1 receives the camping mode - canopy closing command input by the user, it transmits the command to the electronic control unit (ECU). The ECU first controls the lights to turn off, and then controls the drive motor to rotate in the opposite direction, automatically retracting the main body of the canopy.

[0050] The role and effect of the embodiments

[0051] This invention allows for automatic deployment and retraction of the sunroof via a one-click vehicle infotainment system or mobile app, completely revolutionizing traditional setup methods and significantly improving efficiency. The main sunroof unit is fully integrated into the tailgate compartment, occupying no trunk or interior storage space, effectively solving the problem of carrying and storing outdoor equipment. When fully retracted, all components are hidden inside the tailgate, making the vehicle's appearance indistinguishable from a regular vehicle, avoiding wind noise, wind resistance, and visual obtrusion associated with externally mounted equipment. Deep integration with the vehicle's electrical architecture enables intelligent connectivity functions such as adaptive lighting and obstacle detection, significantly enhancing the automation and intelligence of camping scenarios. When deployed, the sunroof and open tailgate form a continuous semi-enclosed space, further extending the vehicle's usability and creating an integrated outdoor living space.

[0052] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An automatic unfolding sunroof device for a car tailgate, characterized in that: The system includes a terminal module (1), a remote information service provider (TSP), a smart cockpit control unit (SCCU), a network management module (2), a safety obstacle avoidance module (3), an electronic control unit (ECU), and a canopy unit (4). The terminal module (1) is connected to the remote information service provider (TSP); the remote information service provider (TSP) is connected to the smart cockpit control unit (SCCU); the smart cockpit control unit (SCCU) is connected to the network management module (2); the network management module (2) is connected to the safety obstacle avoidance module (3); the safety obstacle avoidance module (3) is connected to the electronic control unit (ECU); and the electronic control unit (ECU) is connected to the canopy unit (4).

2. The automatic unfolding sunroof device for a car tailgate as described in claim 1, characterized in that: The terminal module (1) sends control commands to the remote information service provider (TSP); the remote information service provider (TSP) sends camping mode commands to the intelligent cockpit control unit (SCCU); the intelligent cockpit control unit (SCCU) transmits signal commands to the network management module (2); the network management module (2) sends operation commands to the safety obstacle avoidance module (3); the safety obstacle avoidance module (3) detects the safety situation, and after meeting the safety standards, sends operation commands to the electronic control unit (ECU); the electronic control unit (ECU) sends the canopy deployment command to the canopy unit (4).

3. The automatic unfolding sunroof device for a car tailgate as described in claim 1, characterized in that: The terminal module (1), the remote information service provider (TSP), and the intelligent cockpit control unit (SCCU) are connected by wireless signal communication; the intelligent cockpit control unit (SCCU), the network management module (2), the safety obstacle avoidance module (3), the electronic control unit (ECU), and the overall canopy unit (4) are connected by a controller area network (CAN) bus.

4. The automatic unfolding sunroof device for a car tailgate as described in claim 1, characterized in that: The terminal module (1) includes a vehicle system and a mobile application (APP).

5. An automatic unfolding sunroof device for a car tailgate as described in claim 1, characterized in that: The safety obstacle avoidance module (3) includes a radar detector and a buzzer; the radar detector is located at the rear of the car tailgate; the buzzer alerts the driver of the distance between the obstacle and the rear of the vehicle by beeping at different frequencies.

6. The automatic unfolding sunroof device for a car tailgate as described in claim 1, characterized in that: The overall canopy unit (4) includes a main canopy unit, an intelligent drive unit, auxiliary support components, and an environmental perception and lighting unit.

7. An automatic unfolding sunroof device for a car tailgate as described in claim 6, characterized in that: The auxiliary support assembly includes a support rod; the environmental sensing and lighting unit includes a solar panel, a light-emitting diode (LED) lamp, and a light sensor; the light sensor detects the ambient light intensity.

8. An automatic unfolding sunroof device for a car tailgate as described in claim 1, characterized in that: The electronic control unit (ECU) automatically adjusts the brightness of the light-emitting diode (LED) lamps based on the light intensity detected by the light sensor.

9. A method for an automatic unfolding sunroof device for a car tailgate according to any one of claims 1-8, characterized in that: The method includes the following steps: S1: The terminal module (1) receives the camping mode - canopy opening command input by the user; S2: The Smart Cockpit Control Unit (SCCU) determines whether the car is in park or whether the handbrake is engaged. If the car is in park or the handbrake is engaged, it proceeds to the next step. S3: The intelligent cockpit control unit (SCCU) calls the vehicle tailgate safety obstacle avoidance module (3) to detect whether there are obstacles in the preset area behind and to the side; S4: If there are no obstacles, control the drive motor in the intelligent drive unit to rotate in the forward direction, driving the roll-up shaft to release the main body of the canopy until it is fully unfolded; S5: After the main body of the canopy is unfolded, the user must manually install the support rods in the auxiliary support assembly to complete the fixation; S6: In camping mode, the light sensor in the environmental perception and lighting unit collects the ambient light intensity in real time, and the electronic control unit (ECU) automatically adjusts the lighting intensity according to the collected ambient light intensity data. S7: When the terminal module (1) receives the camping mode - canopy closing command input by the user, it transmits the command to the electronic control unit (ECU). The electronic control unit (ECU) first controls the lights to turn off, and then controls the drive motor to rotate in the opposite direction to automatically retract the canopy body.