Method, device and readable storage medium for adjusting light transmittance of vehicle window glass

Abstract

The present disclosure provides a light transmittance adjustment method, device and readable storage medium of vehicle window glass, relating to the technical field of vehicle intelligent control, the light transmittance adjustment method of vehicle window glass comprising: determining an adjustment parameter of the light transmittance of the vehicle window glass when it is determined that the vehicle will enter or exit a tunnel after a first time duration; adjusting the light transmittance of the vehicle window glass according to the adjustment parameter; the adjustment parameter is configured to adjust the light transmittance of the vehicle window glass to a target light transmittance when the vehicle reaches the tunnel entrance. This makes the driver no longer experience sudden light and dark changes when entering or exiting the tunnel, eliminates the visual impact of "light adaptation" or "dark adaptation" caused by adjustment lag, and improves driving safety.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle intelligent control technology, and in particular to a method, apparatus and readable storage medium for adjusting the light transmittance of vehicle window glass. Background Technology

[0002] In related technologies, the light transmittance adjustment scheme for vehicle windows typically relies on light sensors to detect changes in ambient light. Adjustment is only initiated the moment the vehicle enters or exits a tunnel, or when there is a drastic change in light, resulting in a response delay of several seconds. During this delay, the driver experiences a brief period of "light adaptation" or "dark adaptation," creating blind spots and posing a safety hazard. Summary of the Invention

[0003] This disclosure provides a method, apparatus, and readable storage medium for adjusting the light transmittance of a vehicle window, eliminating the visual impact of "light adaptation" or "dark adaptation" caused by adjustment lag, and improving driving safety.

[0004] In a first aspect, this application provides a method for adjusting the light transmittance of a vehicle window glass, the method comprising: determining an adjustment parameter for the light transmittance of the vehicle window glass when it is determined that the vehicle will enter or exit a tunnel after a first time period; adjusting the light transmittance of the vehicle window glass according to the adjustment parameter; wherein the adjustment parameter is configured to adjust the light transmittance of the vehicle window glass to a target light transmittance when the vehicle arrives at the tunnel entrance.

[0005] This application pre-determines adjustment parameters when it is known that a vehicle will enter or exit a tunnel after a certain time interval, and adjusts the light transmittance of the vehicle window glass according to these parameters. This ensures that the light transmittance smoothly transitions to a target value that matches the tunnel's internal and external environment when the vehicle actually arrives at the tunnel entrance. The driver no longer experiences sudden changes in light and dark when entering or exiting the tunnel, eliminating the visual impact of "light adaptation" or "dark adaptation" caused by adjustment lag, thus improving driving safety. The entire process requires no manual intervention from the driver, achieving "unobtrusive" intelligent light transmittance management, enhancing driving comfort and the vehicle's technological feel.

[0006] In one possible implementation, the method further includes: acquiring the vehicle's real-time location, speed, and road map information ahead; and determining the time when the vehicle enters or exits the tunnel based on the vehicle's real-time location, speed, and road map information ahead.

[0007] This application acquires the vehicle's real-time location, speed, and road map information, and uses navigation data to predict the tunnel ahead. It can accurately calculate the exact time of entry or exit from the tunnel before the vehicle actually reaches the tunnel entrance. This timing information provides a reliable basis for determining the timing of subsequent adjustments, making advance adjustment of light transmittance possible and overcoming the inherent limitation of sensor-based solutions that cannot predict tunnel locations.

[0008] In one possible implementation, the method further includes: acquiring the vehicle's real-time location, speed, and road map information ahead; and determining the time when the vehicle enters or exits the tunnel based on the vehicle's real-time location, speed, and road map information ahead.

[0009] This application utilizes real-time location, vehicle speed, and high-precision map information provided by the navigation module to accurately predict the exact time of entry into or exit from the tunnel before the vehicle actually arrives at the tunnel entrance. This timing information allows for advance initiation of light transmittance adjustment, reserving sufficient time for the adjustment action. This ensures a smooth transition of light transmittance before sudden changes in illumination, solving the problem of relying on light sensors to predict tunnel location in advance and achieving predictive adjustment based on navigation information.

[0010] In one possible implementation, determining the adjustment parameters for the light transmittance of the vehicle window glass includes: determining the adjustment parameters for the light transmittance of the vehicle window glass according to preset parameters, which include at least one of the following: vehicle speed, distance between the vehicle and the tunnel entrance, tunnel length, weather condition parameters, and ambient brightness parameters.

[0011] This application comprehensively considers multiple preset parameters, including vehicle speed, distance from the tunnel entrance, tunnel length, weather conditions, and ambient brightness, to determine the adjustment parameters. This multi-dimensional data fusion enables precise matching of the transmittance adjustment strategy with the diverse factors of the actual driving environment. At higher vehicle speeds, the adjustment time window is shorter, allowing the system to automatically adjust at a faster pace. In longer tunnels, the system can maintain a stable dark state within the tunnel. In rain, snow, or fog, the system can automatically reduce the adjustment depth to prevent further reduction in visibility. Through comprehensive multi-parameter decision-making, it avoids under- or over-adjustment caused by a single parameter, improving the accuracy and adaptability of the adjustment strategy in different driving scenarios.

[0012] In one possible implementation, the window glass is a windshield, and the method further includes: when the time for the vehicle to enter or exit the tunnel is less than a second duration, adjusting the light transmittance of the windshield at a second rate to a transmittance adapted to the external light intensity. The adjustment parameters include adjusting the start timing, which is earlier than when the time for the vehicle to enter or exit the tunnel is less than the second duration.

[0013] In this application, the adjustment parameters include the timing of the adjustment start, which is earlier than when the time it takes for the vehicle to enter or exit the tunnel is less than a second time period. Therefore, at the initial adjustment start time, the windshield undergoes a first light transmittance adjustment; when the time it takes for the vehicle to enter or exit the tunnel is less than the second time period, a second light transmittance adjustment is performed at a second rate, achieving phased adjustment of the windshield's light transmittance. Specifically, the first stage of adjustment starts earlier, with the light transmittance changing at a relatively gradual rate, allowing the driver's eyes to gradually prepare for dark or light adaptation, avoiding discomfort caused by sudden changes in brightness. The second stage starts when the vehicle is about to pass through the tunnel entrance and the remaining time is less than the second time period, rapidly adjusting the light transmittance at a second rate to a target value that precisely matches the lighting environment on the other side of the tunnel entrance. Through the coordinated operation of these two stages, both the smoothness of the visual transition and the timeliness and accuracy of adjustments at key points are ensured, eliminating the instantaneous visual impact at the tunnel entrance and guaranteeing driving safety.

[0014] For example, the second duration can be 0 or less than 10 seconds to ensure that the secondary adjustment of the light transmittance of the windshield is initiated when the vehicle is passing through the tunnel entrance or within a few seconds before passing through the tunnel entrance, so that the change in light transmittance is seamlessly connected with the visual boundary event of the tunnel entrance, and the driver feels a smooth vision that has been adapted at the moment of passing through the tunnel entrance.

[0015] For example, when entering a tunnel, the endpoint of adjusting the light transmittance of the windshield at the second rate is strictly synchronized with the moment when the vehicle crosses the tunnel entrance boundary.

[0016] In one possible implementation, the rate at which the light transmittance of the car window glass is adjusted according to the adjustment parameters is a first rate, which is less than a second rate.

[0017] This application employs a slower initial adjustment rate when the vehicle is still some distance from the tunnel entrance, resulting in a smoother change in light transmittance and greater driver comfort. A faster second rate is used as the vehicle approaches the tunnel entrance, ensuring that critical adjustments are completed within a shorter time window. By differentiating adjustment rates for different stages, a balance is struck between smoothness and timeliness, avoiding the abruptness of consistently rapid adjustments while ensuring timely completion of adjustments at critical points near the tunnel entrance.

[0018] In one possible implementation, the vehicle windows are divided into windshield, side windows, and sunroof according to their functional areas. The adjustment parameters for determining the light transmittance of the vehicle windows include: determining the corresponding adjustment parameters for the light transmittance of the vehicle windows based on their functional areas.

[0019] This application divides the vehicle windows into functional areas: the windshield, side windows, and sunroof, and determines corresponding adjustment parameters for each functional area. The windshield, as the driver's primary visual channel, prioritizes visual safety in its adjustment strategy; the side windows and sunroof, as areas for adjusting the passenger cabin environment, focus on light comfort and privacy protection in their adjustment strategies. By employing differentiated adjustment strategies for different functional areas, a zoned, coordinated adjustment effect is achieved that prioritizes both safety and comfort.

[0020] In one possible implementation, the adjustment parameters include adjustment initiation timing, target light transmittance, and adjustment rate; the adjustment initiation timing of the windshield is earlier than that of the side windows and / or sunroof; the target light transmittance of the windshield is less than that of the side windows and / or sunroof; and the adjustment rate of the side windows and / or sunroof is less than the maximum adjustment rate of the windshield.

[0021] The windshield adjusts earlier than the side windows and sunroof, ensuring the driver's field of vision completes the light transmittance transition first. The windshield's target light transmittance is lower, keeping the main field of vision darker to filter glare and guarantee the clear vision required for safe driving. The side windows and sunroof adjust more gradually, resulting in softer, more natural changes in light in the passenger area, avoiding abrupt changes in brightness that could negatively impact the passenger experience. Through these three dimensions of coordinated and differentiated configuration, precise zoned control is achieved, prioritizing both safety and comfort.

[0022] In one possible implementation, the window glass is a windshield, and the adjustment of the window glass's light transmittance is initiated when the light at the tunnel exit is detected as the vehicle exits the tunnel.

[0023] This application synchronizes the adjustment of the windshield before exiting the tunnel with the visual event of the driver actually seeing the tunnel exit light. The light transmittance smoothly returns to a state matching the external lighting environment within the window period from "seeing the exit light" to "completely exiting," ensuring that the windshield has already completed light transmittance adaptation the moment the vehicle exits the tunnel and strong external light floods in. The driver does not need to experience a visual shock from darkness to light, resulting in a more natural and smooth exit experience.

[0024] In one possible implementation, the method further includes: acquiring forward-looking environmental perception data; and calibrating the target transmittance or transmittance adjustment rate of the windshield based on the forward-looking environmental perception data during the process of adjusting the transmittance of the windshield according to the adjustment parameters.

[0025] Forward-facing environmental perception data enables the windshield adjustment to respond to the actual illumination gradient at the tunnel entrance. When there is a deviation between the predicted value and the actual illumination at the tunnel entrance, the system can correct the adjustment parameters based on real-time perception data. This ensures that the windshield transmittance adjustment endpoint precisely matches the actual illumination environment on the other side of the tunnel entrance, avoiding under- or over-adjustment caused by errors between preset values ​​and the actual environment, thus improving the accuracy and safety of windshield adjustment. By combining the advance advantage of navigation prediction with the accuracy of real-time sensor feedback, the windshield adjustment takes into account both advance preparation and real-time correction. The side window and sunroof adjustments take into account both overall planning and dynamic adaptation, forming a closed-loop adaptive adjustment. This compensates for the inability of open-loop control to cope with dynamic changes in illumination, improving the accuracy and robustness of the adjustment.

[0026] In one possible implementation, the method further includes: acquiring in-vehicle illumination data; and calibrating the target transmittance or transmittance adjustment rate of the side windows and / or sunroof based on forward environmental perception data during the process of adjusting the transmittance of the window glass according to adjustment parameters.

[0027] By acquiring in-vehicle lighting data, the system can perform real-time calibration of the target light transmittance or adjustment rate of the side windows and sunroof during the adjustment process. This in-vehicle lighting data ensures that the adjustment of the side windows and sunroof remains consistent with the actual lighting environment inside the passenger compartment. When the in-cabin lighting deviates from expectations due to external weather changes, fluctuations in tunnel lighting conditions, or other factors, the system can dynamically fine-tune the adjustment parameters of the side windows and sunroof based on the in-vehicle lighting data, ensuring the stability and comfort of the passenger compartment's lighting environment.

[0028] In one possible implementation, the method further includes: adjusting the light transmittance of the vehicle window glass according to the lighting environment inside the tunnel during the third time period after the vehicle enters the tunnel; maintaining the light transmittance of the side window glass and / or sunroof glass and adjusting the light transmittance of the windshield glass according to the lighting environment inside the tunnel and / or the length of the tunnel after the third time period after the vehicle enters the tunnel and before the adjustment is initiated when the vehicle exits the tunnel.

[0029] This application divides the time after entering a tunnel into two phases: an adaptation period and a stabilization period. Initially, all vehicle windows undergo rapid adaptation and adjustment based on the actual lighting conditions inside the tunnel, quickly matching their light transmittance to the tunnel's illumination. During the stabilization period, the light transmittance of the side windows and sunroof remains constant to maintain a consistent lighting environment in the passenger compartment, while the windshield continues to be finely adjusted according to the tunnel's lighting conditions and length. For long tunnels, the windshield can remain in a stable, dark state inside the tunnel, allowing the driver's eyes to fully adapt before frequent changes occur. For short tunnels, preparation for entry and exit is quickly initiated. This segmented strategy balances the need for rapid adaptation during initial entry with the need for stability during driving, taking into account both optimized driver visibility and a comfortable passenger experience.

[0030] In one possible implementation, the method further includes: collecting input information to generate a temporary defined strategy; or collecting input information and storing the input information as a custom strategy; or collecting input information, generating a temporary defined strategy, and storing the temporary defined strategy as a custom strategy.

[0031] This application allows drivers to customize transmittance adjustment strategies by inputting information. It can generate temporary strategies that only apply to the current trip, or save preferences as custom strategies for repeated use in subsequent trips. This function, on top of automatic adjustment, gives drivers personalized control, enabling adjustment strategies to adapt to different drivers' visual habits and comfort preferences, thus improving the system's user-friendliness and applicability.

[0032] Secondly, this application provides a device for adjusting the light transmittance of a vehicle window glass. The device includes: a determining module for determining adjustment parameters of the light transmittance of the vehicle window glass when it is determined that the vehicle will enter or exit a tunnel after a first time period; and an adjusting module for adjusting the light transmittance of the vehicle window glass according to the adjusting parameters. The adjusting parameters are configured to adjust the light transmittance of the vehicle window glass to a target light transmittance when the vehicle arrives at the tunnel entrance.

[0033] This application pre-determines adjustment parameters when it is known that a vehicle will enter or exit a tunnel after a certain time interval, and adjusts the light transmittance of the vehicle window glass according to these parameters. This ensures that the light transmittance smoothly transitions to a target value that matches the tunnel's internal and external environment when the vehicle actually arrives at the tunnel entrance. The driver no longer experiences sudden changes in light and dark when entering or exiting the tunnel, eliminating the visual impact of "light adaptation" or "dark adaptation" caused by adjustment lag, thus improving driving safety. The entire process requires no manual intervention from the driver, achieving "unobtrusive" intelligent light transmittance management, enhancing driving comfort and the vehicle's technological feel.

[0034] Thirdly, this application provides a control device, including: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; the processor executes the computer program to implement the method for adjusting the light transmittance of the vehicle window glass according to any of the above embodiments.

[0035] Fourthly, this application provides a computer-readable storage medium storing computer program instructions, which, when executed by a processor, implement the method for adjusting the light transmittance of a vehicle window glass according to any of the above embodiments.

[0036] Fifthly, this application provides a computer program product, which includes computer program instructions that, when executed by a processor, implement the method for adjusting the light transmittance of a vehicle window glass according to any of the above embodiments.

[0037] Sixthly, this application provides a vehicle, including the light transmittance adjustment device for the vehicle window glass in any of the preceding embodiments; or the control device in any of the preceding embodiments; or the computer-readable storage medium in any of the preceding embodiments; or the computer program product in any of the preceding embodiments. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.

[0039] Figure 1 A block diagram of an intelligent cockpit domain architecture provided for some embodiments of this disclosure; Figure 2 A flowchart of a method for adjusting the light transmittance of a vehicle window glass provided in some embodiments of this disclosure. Figure 1 ; Figure 3 The present invention discloses a method for adjusting the light transmittance of a vehicle window glass according to some embodiments. Figure 2 ; Figure 4 A flowchart illustrating a method for adjusting the light transmittance of a vehicle window glass according to some embodiments of this disclosure. Figure 3 ; Figure 5 A schematic diagram of the structure of a device for adjusting the light transmittance of a vehicle window glass provided in some embodiments of this disclosure; Figure 6 This disclosure provides a schematic diagram of the structure of a control device according to some embodiments. Detailed Implementation

[0040] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0041] It should be noted that, in this disclosure, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0042] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0043] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "more than one" means two or more.

[0044] As mentioned in the background technology section, with the development of automotive intelligence, electrochromic glass has begun to be applied to sunroofs and side windows of high-end cars. Related technologies mainly rely on light sensors (such as ambient light sensors and sunlight sensors) or manual triggering to adjust the light transmittance of the windows to meet needs such as strong light and privacy.

[0045] Based on the above problems, this application fully considers driving safety and ergonomics, and formulates differentiated predictive adjustment strategies for the different functions of the driver's main visual channel (windshield) and the passenger comfort zone (side windows / sunroof), thus forming the method for adjusting the light transmittance of the vehicle window glass in this embodiment.

[0046] Methods for adjusting the light transmittance of automotive window glass are used in smart cockpit architectures, such as... Figure 1 As shown, the intelligent cockpit domain architecture includes: Central computing unit 110: It adopts the vehicle's intelligent driving domain controller or cockpit domain controller as the main controller, which has powerful computing power to process multi-sensor fusion data and execute complex strategies.

[0047] The perception and navigation unit specifically includes: Vehicle navigation module 122: used to provide real-time vehicle location, speed, driving direction and high-precision map information including tunnel geographical attributes (location, length and type).

[0048] Forward vision system 124: includes a forward-looking camera and an infrared camera, used to identify the contours of the tunnel entrance / exit, the internal lighting gradient, and whether there are lighting facilities in the tunnel in real time.

[0049] Zoned ambient light sensor 126: A "forward light sensor" is set in front of the instrument panel to mainly detect the light in the driver's field of vision; a "side / cabin interior light sensor" is set in the B-pillar or roof to monitor the overall lighting in the passenger compartment.

[0050] Execution Unit (Partition): Windshield adjustment device 130: Fast-response electrochromic glass, serving as the "main visual channel adjustment zone".

[0051] Side window and sunroof adjustment device 140: uses electrochromic glass as an "interior environment and privacy adjustment zone". Its drive circuit is independent of the windshield.

[0052] The intelligent cockpit domain architecture enables methods to adjust the light transmittance of vehicle windows.

[0053] This application specifically provides a method for adjusting the light transmittance of a vehicle window, a device for adjusting the light transmittance of a vehicle window, a vehicle, a computer program product, and a readable storage medium.

[0054] The method for adjusting the light transmittance of vehicle window glass provided in this application is applied to vehicles.

[0055] Figure 2 A flowchart of a method for adjusting the light transmittance of a vehicle window glass provided in some embodiments of this disclosure. Figure 1 .

[0056] like Figure 2 As shown, the methods for adjusting the light transmittance of car window glass include: S202 determines that a vehicle will enter or exit the tunnel after a certain period of time.

[0057] This step can be performed through the central control unit. The central control unit has a built-in prediction algorithm module that predicts the time when the vehicle enters and exits the tunnel based on navigation information.

[0058] In one possible implementation, this step further includes: acquiring the vehicle's real-time location, speed, and road map information ahead; and determining the time when the vehicle enters or exits the tunnel based on the vehicle's real-time location, speed, and road map information ahead. Specifically, the in-vehicle navigation module provides the vehicle's real-time location, speed, driving direction, and high-precision map information including tunnel geographical attributes, such as the tunnel's location, length, and type.

[0059] This step is equivalent to obtaining the vehicle's real-time location, speed, and road map information ahead, and determining the time for the vehicle to enter or exit the tunnel based on the vehicle's real-time location, speed, and road map information ahead.

[0060] The adjustment initiation timing refers to the point at which the system begins adjusting the light transmittance of the vehicle windows when it determines that the vehicle will enter or exit the tunnel after a certain time interval. The first time interval is a preset time threshold, the value of which can be dynamically determined based on factors such as vehicle speed and distance from the tunnel entrance. Determining the adjustment initiation timing allows the light transmittance adjustment to begin before sudden changes in light intensity, reserving sufficient time for the adjustment action.

[0061] Compared to existing technologies that rely on light sensors and can only adjust the light transmittance when there is a drastic change in illumination, this application uses navigation data to predict the tunnel ahead. It can accurately calculate the specific time of entering or exiting the tunnel before the vehicle actually arrives at the tunnel entrance, making it possible to adjust the light transmittance in advance and solving the inherent defect of sensor solutions that cannot predict the location of tunnels.

[0062] like Figure 2 As shown, the method also includes: S204, determining the adjustment parameters for the light transmittance of the vehicle window glass.

[0063] This step can be performed through the adjustment parameter determination module configured in the central control unit. The central control unit generates adjustment strategy parameters based on tunnel length, current vehicle speed, and external lighting conditions.

[0064] In one possible implementation, determining the adjustment parameters for the light transmittance of the vehicle window glass includes: determining the adjustment parameters for the light transmittance of the vehicle window glass according to preset parameters, which include at least one of the following: vehicle speed, distance between the vehicle and the tunnel entrance, tunnel length, weather condition parameters, and ambient brightness parameters.

[0065] Adjustment parameters refer to a set of configuration information that controls changes in the light transmittance of vehicle windows, including but not limited to the adjustment initiation timing, target light transmittance, and adjustment rate. The adjustment initiation timing determines when the light transmittance begins to change; the target light transmittance determines the target value of the light transmittance change; and the adjustment rate determines how quickly the light transmittance changes. These three parameters together define the complete behavior of light transmittance adjustment.

[0066] This step is equivalent to determining the adjustment parameters for the light transmittance of the vehicle window glass based on preset parameters. The preset parameters include at least one of the following: vehicle speed, distance between the vehicle and the tunnel entrance, tunnel length, weather conditions, and ambient brightness.

[0067] Compared to existing technologies that determine transmittance adjustment targets solely based on a single light intensity, this application comprehensively considers multiple preset parameters, including vehicle speed, distance from the tunnel entrance, tunnel length, weather conditions, and ambient brightness, to determine the adjustment parameters, achieving multi-dimensional data fusion. At higher vehicle speeds, the adjustment time window is shorter, allowing the system to automatically match a faster adjustment pace; in longer tunnels, the system can maintain a stable dark state within the tunnel; in rain, snow, or fog, the system can automatically reduce the adjustment depth to prevent further reduction in visibility. Through multi-parameter integrated decision-making, it avoids under- or over-adjustment caused by a single parameter, improving the accuracy and adaptability of the adjustment strategy in different driving scenarios.

[0068] like Figure 2 As shown, the method also includes: S206, adjusting the light transmittance of the car window glass according to the adjustment parameters.

[0069] This step can be performed by the zone execution unit. The zone execution unit includes a windshield adjustment subsystem and a side window and sunroof adjustment subsystem, which respectively receive adjustment commands from the central control unit.

[0070] The adjustment parameters are configured to adjust the light transmittance of the vehicle window to a target transmittance when the vehicle reaches the tunnel entrance. The target transmittance refers to the transmittance value that matches the lighting environment on the other side of the tunnel entrance, so that the brightness transition perceived by the driver when passing through the tunnel entrance is smooth and natural.

[0071] This step is equivalent to adjusting the light transmittance of the car window glass according to the adjustment parameters, which are configured to adjust the light transmittance of the car window glass to the target light transmittance when the vehicle arrives at the tunnel entrance.

[0072] By initiating the adjustment process in advance, the light transmittance smoothly transitions to the target value that matches the tunnel's internal and external environment before any sudden change in lighting occurs. Drivers no longer experience sudden changes in light or darkness when entering or exiting the tunnel, eliminating the visual shock of "light adaptation" or "dark adaptation" caused by adjustment lag, thus improving driving safety. The entire process requires no manual intervention from the driver, achieving "unobtrusive" intelligent light transmittance management.

[0073] like Figure 3 As shown, the method also includes: S208, when the time for the vehicle to enter or exit the tunnel is less than the second time, adjusting the light transmittance of the windshield to a light transmittance that is compatible with the external light intensity at a second rate.

[0074] This step can be performed through the windshield adjustment subsystem. The windshield, as the main visual channel adjustment area, includes the windshield electrochromic glass and its dedicated drive circuit, which receives adjustment commands with the core objective of ensuring the driver's visual safety.

[0075] The adjustment parameters include adjusting the start timing, specifically when the start timing is earlier than the time it takes for the vehicle to enter or exit the tunnel, which is less than the second time. Therefore, when adjusting the start timing, the windshield first undergoes a light transmittance adjustment; when the time it takes for the vehicle to enter or exit the tunnel is less than the second time, a second light transmittance adjustment is performed at a second rate, achieving a staged adjustment of the windshield's light transmittance.

[0076] The first stage – preparatory adjustment: The adjustment is initiated early, when the windshield is far from the tunnel entrance. The light transmittance begins to change gradually at the first rate. The changes are slight at this stage, and the purpose is to allow the driver's eyes to gradually enter a state of preparation for dark adaptation or light adaptation, so as to avoid discomfort caused by sudden changes in brightness.

[0077] The second stage—main adjustment—begins when the vehicle is about to pass through the tunnel entrance and the remaining time is less than the second duration. It rapidly adjusts the light transmittance at a second rate to a target value that precisely matches the lighting environment on the other side of the tunnel entrance. For example, the second duration can be 0 or less than 10 seconds to ensure that the second stage adjustment begins either as the vehicle is passing through the tunnel entrance or within a few seconds before passing through. For entering the tunnel, the endpoint of adjusting the windshield's light transmittance at the second rate is strictly synchronized with the moment the vehicle crosses the tunnel entrance boundary.

[0078] Target light transmittance refers to the light transmittance value that vehicle window glass needs to achieve, which matches the ambient light intensity the vehicle will enter. When entering a tunnel, the target light transmittance is a lower value that matches the lighting environment inside the tunnel; when exiting a tunnel, the target light transmittance is a higher value that matches the lighting environment outside the tunnel. The target light transmittance can be determined based on a comprehensive calculation of parameters such as tunnel length, weather conditions, and ambient brightness.

[0079] The second duration refers to the critical time threshold when the vehicle is about to pass through the tunnel entrance, which is used to trigger the second stage of rapid adjustment of the windshield.

[0080] For example, the second duration can be 0 or less than 10 seconds. When the remaining time for a vehicle to enter or exit the tunnel is less than the second duration, it means that the vehicle is about to cross the tunnel entrance boundary. At this time, rapid adjustment is initiated to ensure that the light transmittance is adapted at the critical moment.

[0081] The first rate is the adjustment rate used by the windshield in the first stage of preparatory adjustment, which is relatively gentle, allowing the driver's eyes to gradually adapt to the change in brightness. The second rate is the adjustment rate used by the windshield in the second stage of main adjustment, which is faster than the first rate, ensuring that the critical adjustment of light transmittance is completed within a limited time window. By differentiating the adjustment rates for different stages, a balance is achieved between "smoothness" and "timeliness".

[0082] This step is equivalent to adjusting the light transmittance of the windshield to a level that matches the external light intensity at a second rate when the time it takes for the vehicle to enter or exit the tunnel is less than the second time.

[0083] Compared to the existing technology that uses a single rate to adjust all vehicle windows, this application, through the coordinated operation of two stages, ensures both the smoothness of the visual transition and the timeliness and accuracy of adjustments at key points, eliminating the instantaneous visual impact at tunnel entrances and ensuring driving safety.

[0084] like Figure 3 As shown, the method also includes: S210, determining the adjustment parameter of the light transmittance of the corresponding window glass according to the functional area to which the window glass belongs.

[0085] This step can be executed through the zoning strategy module configured in the central control unit. The vehicle windows are divided into functional areas: the windshield, side windows, and sunroof. The windshield serves as the main visual channel adjustment area, and its adjustment strategy focuses on ensuring a smooth visual transition; the side windows and sunroof serve as cabin environment and comfort adjustment areas, and their adjustment strategies focus on managing the passenger cabin's light environment and thermal comfort.

[0086] Functional zones refer to the different areas within a vehicle that are divided according to the various functions that the windows serve. The windshield is the driver's primary visual channel for obtaining external information, and its core requirement is ensuring visual safety; side windows and sunroofs mainly serve the light environment comfort, privacy protection, and thermal comfort of the passenger compartment. Based on the division of functional zones, the system can formulate differentiated adjustment strategies for the windows in different areas.

[0087] In one possible implementation, the adjustment parameters include adjustment initiation timing, target light transmittance, and adjustment rate; the adjustment initiation timing of the windshield is earlier than that of the side windows and sunroof; the target light transmittance of the windshield is less than that of the side windows and sunroof; and the adjustment rates of the side windows and sunroof are less than the maximum adjustment rate of the windshield.

[0088] Specifically, during the pre-tunnel adjustment process, the windshield initiates pre-adjustment first, while the side windows and sunroof adjust after a set time to avoid a sudden, overall darkening effect on occupants. The windshield has a lower target light transmittance, keeping the main field of vision darker to filter glare and ensure clear visibility for safe driving; the side windows and sunroof have relatively higher target light transmittance, balancing light intake and comfort in the passenger compartment. The side windows and sunroof adjust more gradually, resulting in softer, more natural changes in light in the passenger area, avoiding abrupt changes in brightness that could negatively impact the passenger experience.

[0089] This step is equivalent to determining the corresponding light transmittance adjustment parameters of the car window glass based on the functional area of ​​the window glass.

[0090] Compared to existing technologies that employ a uniform adjustment strategy for all vehicle windows, this application divides the window glass into functional zones and implements differentiated adjustments. The windshield prioritizes driver visual safety, while the side windows and sunroof balance comfort and privacy. Through this coordinated and differentiated configuration across three dimensions, precise zoned control is achieved, prioritizing both safety and comfort.

[0091] Adjusting the windshield when the vehicle exits the tunnel.

[0092] This step can be performed through the windshield adjustment subsystem. When the vehicle is about to exit the tunnel, the windshield adjustment is initiated when the light of the tunnel exit is detected.

[0093] Specifically, as a vehicle approaches the tunnel exit, the forward-looking vision system identifies the tunnel exit's outline and brightness in real time. Once the brightness of the tunnel exit is detected, the system triggers an exit adjustment of the windshield. Within the time window between "seeing the exit brightness" and "completely exiting the tunnel," the light transmittance linearly and stably adjusts from its value inside the tunnel to a value matching the external environment. The core principle is to ensure that the glass is in a state sufficient to filter most of the intense light the instant the vehicle exits the tunnel and strong external light floods in, and then quickly returns to a value adapted to the external environment.

[0094] For exit adjustments of the side windows and sunroof, the recovery adjustment of the side windows and sunroof is delayed compared to the adjustment of the windshield, and the light transmittance is restored at a gradual rate. Alternatively, for exit adjustments of the side windows and sunroof, the visual effect can be quickly and accurately restored to the same target value as before exiting the tunnel, based on the light intensity at the critical point of the tunnel entrance.

[0095] This step is equivalent to the adjustment of the light transmittance of the windshield being activated when the vehicle is exiting the tunnel and the light from the tunnel exit is detected.

[0096] This application synchronizes the timing of the windshield adjustment before exiting the tunnel with the visual event of the driver actually seeing the light at the tunnel exit, so that the light transmittance adjustment and visual experience are naturally connected. This ensures that the windshield has completed the light transmittance adaptation the moment the vehicle rushes out of the tunnel, so that the driver does not have to experience the visual shock of going from dark to bright, and the driving experience is more natural and smooth.

[0097] like Figure 3 As shown, the method also includes: S212, acquiring forward environmental perception data and / or in-vehicle illumination data, and calibrating the adjustment parameters in real time.

[0098] This step can be performed using an environmental perception module and an in-cabin ambient light sensor. The environmental perception module includes forward-facing vision sensors, such as a forward-facing high-definition camera and an infrared camera, for detecting the lighting environment ahead of the vehicle.

[0099] In one possible implementation, forward-looking environmental perception data is acquired. During the adjustment of the windshield's transmittance according to adjustment parameters, the target transmittance or transmittance adjustment rate of the windshield is calibrated based on the forward-looking environmental perception data. The forward-looking environmental perception data enables the windshield's adjustment to respond to the actual illumination gradient at the tunnel entrance. When there is a deviation between the predicted value and the actual illumination at the tunnel entrance, the system can correct the adjustment parameters based on real-time perception data, ensuring that the windshield's transmittance adjustment endpoint precisely matches the actual illumination environment on the other side of the tunnel entrance.

[0100] Forward environmental perception data refers to the lighting environment information ahead of the vehicle collected by forward vision sensors, including the outlines of tunnel entrances and exits, internal lighting gradients, and whether there are lighting facilities inside the tunnel. This data is used to calibrate the navigation prediction adjustment parameters in real time, compensating for any possible deviations between the predicted values ​​and the actual lighting conditions.

[0101] In one possible implementation, in-vehicle illumination data is acquired. During the adjustment of the window transmittance according to adjustment parameters, the target transmittance or transmittance adjustment rate of the side windows and sunroof is calibrated based on the in-vehicle illumination data. The in-vehicle illumination data ensures that the adjustment of the side windows and sunroof is consistent with the actual lighting environment inside the passenger compartment. When the in-cabin illumination deviates from expectations due to external weather changes, fluctuations in tunnel lighting conditions, or other factors, the system can dynamically fine-tune the adjustment parameters of the side windows and sunroof based on the in-vehicle illumination data.

[0102] In-vehicle lighting data refers to the overall lighting information of the passenger compartment collected by the "forward light sensor" located in front of the instrument panel and the "side / cabin interior light sensor" located on the B-pillar or roof. This information is used to monitor the overall lighting environment of the passenger compartment and is fed back to the central control unit for fine-tuning the adjustment targets of the side window and sunroof subsystems.

[0103] Safety redundancy: The windshield adjustment command has the highest priority. If the prediction algorithm and the real-time vision sensor's judgment are inconsistent, the real-time sensor's judgment will prevail to ensure safety.

[0104] This step is equivalent to acquiring forward-facing environmental perception data and / or in-vehicle lighting data, and performing real-time calibration of the target light transmittance or adjustment rate for the windshield, side windows, and sunroof during the adjustment process. By combining the proactive advantage of navigation prediction with the accuracy of real-time sensor feedback, a closed-loop adaptive adjustment is formed, which compensates for the inability of open-loop control to cope with dynamic changes in lighting, and improves the accuracy and robustness of the adjustment.

[0105] Segmented adjustment after the vehicle enters the tunnel.

[0106] This step can be executed jointly by the central control unit and the partition execution unit.

[0107] Within three hours of the vehicle entering the tunnel, the light transmittance of the windows is adjusted according to the lighting environment inside the tunnel. After entering the tunnel, based on real-time analysis of the lighting inside the tunnel by light intensity sensors, such as the presence of light strips, all windows are adjusted to adapt within a short period of time. For the windshield, the light transmittance is linearly adjusted to achieve optimal driving visibility; for the side windows and sunroof, slight dynamic adjustments are made to adapt to the tunnel environment.

[0108] Three hours after the vehicle enters the tunnel, before the adjustment mechanism for exiting the tunnel is initiated, the light transmittance of the side windows and sunroof is maintained, while the light transmittance of the windshield is adjusted according to the lighting environment inside the tunnel and the tunnel length. After entering the stabilization period, the light transmittance of the side windows and sunroof remains constant to maintain a consistent lighting environment in the passenger compartment, and does not change again before the exit strategy is implemented. The windshield continues to be finely adjusted according to the lighting environment inside the tunnel and the tunnel length: for long tunnels, the windshield remains in a stable dark state during tunnel driving, and no longer changes frequently after the driver's eyes have fully adapted, always maintaining the contrast within the driver's field of vision within a comfortable range; for consecutive short tunnels, the system performs rapid, small-range cyclic adjustments.

[0109] The third time period refers to the initial period after the vehicle enters the tunnel to quickly adapt to the internal lighting environment. During this third time period, the system rapidly adjusts all window glass according to the actual lighting conditions inside the tunnel. After the third time period ends, the system enters a stable period, maintaining constant light transmittance for the side windows and sunroof, while continuing to finely adjust the windshield.

[0110] This step is equivalent to adjusting the windows within the third hour after the vehicle enters the tunnel. After the third hour, the light transmittance of the side windows and sunroof is maintained while the light transmittance of the windshield is adjusted.

[0111] This segmented strategy allows each window to quickly adapt to the interior lighting during the initial stage of entering the tunnel. In subsequent stages, while maintaining the stability of the passenger compartment, it continuously optimizes the light transmittance in the driver's field of vision area, balancing the need for rapid adaptation during the initial stage with the need for stability during the journey, and taking into account both driver visibility optimization and passenger compartment comfort.

[0112] Execution of strategies for special scenarios.

[0113] This step can be performed through the scene recognition module configured in the central control unit. The system identifies special scenes based on weather condition parameters and ambient brightness parameters, and automatically adjusts the control strategy accordingly.

[0114] In rainy, snowy, or foggy weather, the adjustment range of the windshield should be reduced, or the depth adjustment should be canceled, to prevent the combined effect of severe weather from further reducing visibility. The adjustment range can be reduced by half.

[0115] When entering a tunnel at night, the strategy may be completely reversed. When entering a lit tunnel, the windshield may need to be slightly brightened or kept bright to balance the difference in brightness between the inside and outside; the side windows can be darkened to eliminate the effect of interior reflections on the driver.

[0116] This step is equivalent to adjusting the control strategy based on weather conditions and ambient brightness parameters to ensure driving safety in special scenarios.

[0117] The method in this application also includes: collecting input information and generating a custom strategy.

[0118] This step can be executed through both the human-computer interaction interface and the policy management module configured in the central control unit.

[0119] In one possible implementation, input information is collected to generate a temporary policy definition. This temporary policy definition only applies to the current trip, allowing the driver to adjust the parameters on the fly during the current trip.

[0120] In one possible implementation, input information is collected and stored as a custom policy. The custom policy persistently stores the driver's preferences for repeated use in subsequent trips.

[0121] In one possible implementation, input information is collected, a temporary defined strategy is generated, and the temporary defined strategy is stored as a custom strategy. The driver can first experience the effect of parameter adjustment in the form of a temporary strategy, and then save it as a custom strategy if satisfied.

[0122] A temporary defined strategy refers to a transmittance adjustment strategy generated by the driver through input information, which only applies to the current trip and is not saved after the trip ends.

[0123] Customized strategies refer to transmittance adjustment strategies generated by the driver through input information and stored persistently. These strategies can be repeatedly invoked in subsequent trips without needing to be reset.

[0124] This step is equivalent to collecting input information to generate a temporary or custom strategy. This function, based on automatic adjustment, gives drivers personalized control capabilities, allowing the adjustment strategy to adapt to different drivers' visual habits and comfort preferences, thus improving the system's user-friendliness and applicability.

[0125] The step numbers S202 to S212 are used only to distinguish different method steps and do not constitute an absolute restriction on the execution order. In practical applications, each step can be executed in parallel or the execution order can be adjusted according to the specific scenario. Each step can be executed through the corresponding functional module, and the correspondence between the functional module and the specific implementation module has been explained in the above description.

[0126] A detailed embodiment is described below to facilitate a better understanding of the light transmittance adjustment method in this application.

[0127] This application takes into full consideration driving safety and ergonomics, and formulates differentiated predictive adjustment strategies for the different functions of the driver's main visual channel (windshield) and the passenger comfort zone (side windows, sunroof).

[0128] like Figure 4As shown, the system operates in two parallel control threads: Thread A (windshield, safety priority) and Thread B (side windows and sunroof, comfort priority).

[0129] The light transmittance adjustment is divided into two parallel control threads: Thread A (windshield, safety priority) and Thread B (side windows / sunroof, comfort priority).

[0130] Thread A: Windshield Adjustment Strategy Core objective: To ensure an absolutely smooth transition between light and dark in the driver's field of vision, eliminating any potential hazards that could cause momentary glare or blurred vision.

[0131] Adjustments before entering the tunnel: Prediction phase: When the navigation system, combined with visual recognition, confirms that the vehicle will enter the tunnel within 15 seconds, the system is activated.

[0132] Phase 1 – Preparatory Adjustment (5-10 seconds before entering): The windshield begins to reduce light transmittance very smoothly. The changes in this phase are slight, and the purpose is to allow the eyes to begin to adapt to the dark adjustment.

[0133] The second stage – main adjustment (2-4 seconds before entry): As the vehicle approaches the tunnel entrance, based on precise light metering from the vision camera, the windshield initiates a rapid but linear main adjustment, reducing the light level within 1 second to a comfortable value that matches the actual lighting inside the tunnel. The endpoint of this adjustment is strictly synchronized with the moment the vehicle fully enters the tunnel's shadow.

[0134] Driving inside the tunnel: Upon entering the tunnel, the system analyzes the real-time illumination inside the tunnel using a light intensity sensor (e.g., whether there are light strips). Within 5 seconds, the system linearly increases the light transmittance to achieve optimal driving visibility. Then, based on the surrounding vehicle conditions, it makes slight dynamic adjustments to the headlights (e.g., ±2%) to maintain the contrast within the driver's field of vision in a comfortable range.

[0135] Adjustments before exiting the tunnel: Prediction phase: Based on the tunnel length and vehicle speed, preparations begin 5 seconds before exiting the tunnel.

[0136] Main adjustment (critical phase): Within the time window between "seeing the light at the tunnel exit" and "completely exiting" (approximately 3-5 seconds), the windshield's light transmittance linearly and steadily increases from the tunnel's internal value to a value matching the external environment. The core is to ensure that the glass is in a relatively dark state, sufficient to filter most of the intense light, the instant the vehicle exits the tunnel and strong external light floods in, and then takes 1-2 seconds to return to the value adapted to the external environment.

[0137] Safety redundancy: Windshield adjustment commands have the highest priority. If the prediction algorithm and the real-time vision sensor's judgment are inconsistent, the real-time sensor's judgment prevails to ensure safety.

[0138] Thread B: Side Window / Sunroof Adjustment Strategy Core objective: To manage the overall lighting environment of the passenger cabin, improve comfort, privacy and thermal comfort, with adjustments that can lag slightly behind those of the windshield.

[0139] Adjustments before entering the tunnel: Coordinated start: The adjustment of the side windows / sunroof starts 1-2 seconds later than the windshield to avoid giving the occupants a sudden feeling of overall darkening.

[0140] Overall adjustment: Linear adjustment to the target value within 5 seconds. This helps to: ① Significantly reduces the visual oppressive feeling caused by proximity to the tunnel walls.

[0141] ②Enhance cabin privacy.

[0142] ③ In summer, reduce light transmittance in advance to reduce the transient heat load caused by solar radiation and reduce the pressure on the air conditioning system.

[0143] Driving inside the tunnel: Based on real-time analysis of the lighting inside the tunnel by the light intensity sensor (such as whether there are light strips), a slight dynamic adjustment (e.g., ±2%) is made within 2 seconds, and then remains unchanged before the exit strategy is implemented.

[0144] Adjustments upon exiting the tunnel: Based on the light intensity at the critical point of the tunnel entrance, quickly and accurately restore the visual effect to the same target value as before driving out.

[0145] Application Examples Based on clear weather conditions, the optimal driving conditions outside the tunnel are: initial light transmittance of the windshield is 75%, initial light transmittance of the side / rear window / sunroof / rear windshield is 50%, and light transmittance of the side / front window is 60%. The adjustment process is as follows: A vehicle traveling at 100 km / h towards a 1 km long tunnel with lower internal lighting intensity than external lighting. T-10 seconds: The windshield begins its first stage of pre-adjustment (75%→72%). Side windows / sunroof remain unchanged.

[0146] T-5 seconds: The windshield begins the second stage of main adjustment (72%→70%).

[0147] T-5 seconds: Linear adjustment of side and rear windows / sunroof / rear windshield (50%→60%), linear adjustment of side and front windows (60%→65%).

[0148] T-0 seconds (arrival at the tunnel entrance): The windshield is exactly 70% open, the side / rear window / sunroof / rear windshield is 60% open, and the side / front window is 65% open.

[0149] Inside the tunnel: Since the light intensity inside the tunnel is lower than outside, the windshield transmittance is quickly and precisely adjusted within 1 second after reaching the tunnel entrance, increasing from 70% to 80% to achieve the same driving visual effect as before entering; the side windows / sunroof / rear windshield adapt to the tunnel environment within 2 seconds, increasing the transmittance by 2% upon entry and maintaining it until the exit strategy is executed.

[0150] Eight seconds before reaching the exit: The windshield begins to adjust.

[0151] Five seconds before reaching the exit (when you see the exit light): The windshield begins its main adjustment, linearly increasing from 80% to 83% within 5 seconds to prepare for the upcoming switch to bright external light.

[0152] Upon reaching the exit: Within 1 second, the light transmittance of the windshield is quickly and precisely adjusted according to the external light intensity, decreasing from 83% to 75% to achieve the same driving visual effect as before exiting. The initial light transmittance of the side and rear windows / sunroof / rear windshield is 50%, and the light transmittance of the side and front windows is 60%.

[0153] Special Scenario Strategies In rainy, snowy, or foggy weather: the adjustment range (darkening depth) of the windshield should be reduced or the depth adjustment should be turned off to prevent the combined effect of severe weather from further reducing visibility.

[0154] Entering a tunnel at night: the strategy may be completely reversed. When entering a lit tunnel, the windshield may need to be slightly brightened (or kept bright) to balance the difference in brightness between the inside and outside; the side windows can be darkened to eliminate the effect of interior reflections on the driver.

[0155] Strategy differences between long tunnels and consecutive short tunnels The system can dynamically calculate the optimal adjustment starting point and rate based on vehicle speed and tunnel length. For long tunnels, it can maintain a stable dark state within the tunnel; for continuous short tunnels, it can perform rapid, small-range cyclic adjustments for a better experience.

[0156] Real-time feedback and dynamic adjustment During adjustment, forward-looking environmental perception data is used to calibrate the windshield adjustment effect in real time; cabin lighting data is used to evaluate the side window / sunroof adjustment effect and make dynamic fine adjustments to cope with unforeseen factors such as weather changes. The above methods need to be combined with special scenario strategies: in nighttime, rain, snow, fog and other inclement weather, the windshield adjustment depth is automatically reduced or the adjustment logic is changed, and the adjustment range can be reduced by half.

[0157] It is understood that the application scenarios of the embodiments of this disclosure are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0158] Figure 4 A method for adjusting the light transmittance of a vehicle window glass in a specific embodiment includes the following steps: Step 1: System startup.

[0159] Step 2: The in-vehicle navigation module and the forward vision system identify the tunnel ahead. When the navigation system, combined with visual recognition, confirms that the vehicle will enter the tunnel within a preset time window (e.g., 15 seconds), the system is activated.

[0160] Step 3: Information Acquisition and Tunnel Prediction. Real-time acquisition of vehicle position, speed, high-precision map information ahead, and forward environmental perception data. When it is determined that a vehicle will enter the tunnel within a preset time window, the zone adjustment process is triggered.

[0161] Step 4: Develop zoned adjustment strategies. Based on tunnel length, current vehicle speed, and external lighting, the central control unit generates independent adjustment strategy parameters for the windshield and side windows / sunroof, including: adjustment start point, target light transmittance, and rate of change curve. The windshield strategy focuses on ensuring a smooth visual transition, while the side window / sunroof strategy prioritizes cabin comfort and privacy.

[0162] Step 5: Perform the front windshield safety adjustment.

[0163] Two-stage adjustment upon entry: Before the vehicle enters the tunnel, the light transmittance of the windshield is adjusted in two stages. The first stage is a preparatory gradual change; the second stage is a rapid and precise adjustment at the tunnel entrance, synchronized with visual events, so that the light transmittance reaches the safe matching value the instant of entry.

[0164] Exit strategy: Before the vehicle exits the tunnel, the light transmittance of the windshield is controlled to decrease linearly during the window period from "seeing the exit light" to "completely exiting the tunnel", ensuring that the glass has sufficient light-blocking ability at the moment of exposure to strong external light.

[0165] Step 6: Perform comfort adjustments for the side windows / sunroof.

[0166] Entry Phase: Compared to the main adjustment action of the windshield, the darkening adjustment of the side windows / sunroof is initiated after a set time delay, and is adjusted to a lower light transmittance target value at a smoother rate.

[0167] During the exit phase: Compared to the brightening adjustment of the windshield, the recovery adjustment of the side windows / sunroof is delayed, and the light transmittance is restored at a gradual rate.

[0168] Step 7: Real-time Feedback and Dynamic Adjustment. During the adjustment process, forward-looking environmental perception data is used to calibrate the windshield adjustment effect in real time; cabin lighting data is used to evaluate the adjustment effect of the side windows / sunroof and make dynamic fine adjustments to cope with unforeseen factors such as weather changes. The above methods need to be combined with special scenario strategies: in nighttime, rain, snow, fog, and other inclement weather, the windshield adjustment depth is automatically reduced or the adjustment logic is changed, and the adjustment range can be reduced by half.

[0169] The foregoing mainly describes the solutions of the embodiments of this disclosure from a methodological perspective. It is understood that, in order to achieve the above-mentioned functions, the light transmittance adjustment device for the vehicle window glass includes at least one of the hardware structures and software modules corresponding to each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure.

[0170] This disclosure embodiment can divide the light transmittance adjustment device for vehicle window glass into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each function into a separate functional module.

[0171] Figure 5 This is a schematic diagram of a light transmittance adjustment device 500 for a vehicle window provided in this embodiment of the present disclosure. The light transmittance adjustment device for the vehicle window is applied to a vehicle and can perform the light transmittance adjustment method for the vehicle window provided in the above-described method embodiment.

[0172] This application provides a device for adjusting the light transmittance of a vehicle window, applicable to vehicles, such as... Figure 5As shown, the light transmittance adjustment device 500 for vehicle window glass includes: a determining module 510, used to determine the adjustment parameters of the light transmittance of the vehicle window glass when it is determined that the vehicle will enter or exit the tunnel after a first time period; and an adjusting module 520, used to adjust the light transmittance of the vehicle window glass according to the adjustment parameters; wherein the adjustment parameters are configured to adjust the light transmittance of the vehicle window glass to a target light transmittance when the vehicle arrives at the tunnel entrance.

[0173] The light transmittance adjustment device for vehicle window glass provided in this application prioritizes alarms based on real-time driving scenarios, allowing the same alarm to receive different priority scores in different scenarios. For example, a low tire pressure alarm is given higher priority in a highway cruising scenario but lower priority in a parking scenario. This effectively filters alarm noise that is irrelevant or less relevant to the current scenario, enabling the driver to prioritize the most urgent alarms that need to be addressed in the current driving scenario, reducing interference from invalid alarms, and improving the efficiency of alarm information transmission and driving safety.

[0174] In the case of implementing the functions of the integrated modules described above in hardware, this disclosure provides a possible structure for the light transmittance adjustment device for the vehicle window glass involved in the above embodiments.

[0175] like Figure 6 As shown, the control device 600 includes a processor 602 and a bus 604. Optionally, the control device may also include a memory 601; optionally, the control device 600 may also include a communication interface 603.

[0176] Optionally, the memory 601 and the processor 602 are coupled; the memory 601 is used to store computer programs; when the processor 602 executes the computer programs, it implements the method for adjusting the light transmittance of the vehicle window glass in any of the above embodiments.

[0177] Processor 602 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 602 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 602 may also be a combination that implements computing functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0178] Communication interface 603 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0179] The memory 601 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0180] In one possible implementation, the memory 601 can exist independently of the processor 602. The memory 601 can be connected to the processor 602 via a bus 604 and is used to store instructions or program code. When the processor 602 calls and executes the instructions or program code stored in the memory 601, it can implement the method for adjusting the light transmittance of the vehicle window glass provided in this embodiment of the present disclosure. In another possible implementation, the memory 601 can also be integrated with the processor 602.

[0181] Bus 604 can be an extended industry standard architecture (EISA) bus, etc. Bus 604 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0182] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed by a processor, implement the method for adjusting the light transmittance of a vehicle window glass according to any of the above embodiments.

[0183] Exemplary examples of computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0184] This disclosure provides a computer program product containing computer instructions. When the computer program instructions are executed by a processor, they implement the method for adjusting the light transmittance of a vehicle window glass according to any of the above embodiments.

[0185] This disclosure provides a vehicle, including a light transmittance adjustment device for a vehicle window as described in any of the preceding embodiments; or a computer-readable storage medium as described in any of the preceding embodiments; or a computer program product as described in any of the preceding embodiments.

[0186] The vehicle provided in this application may be a passenger vehicle or a freight vehicle, and may also be an electric vehicle or a hybrid vehicle. This application does not limit the specific purpose or power type of the vehicle, and the choice can be made according to actual needs.

[0187] In some possible examples, a vehicle consists of a body and wheels. The body is used for passengers and for carrying goods, while the wheels are mounted underneath the body to support it and to roll on the road surface, thus enabling the vehicle to move.

[0188] In some possible examples, the vehicle is equipped with a control system, which typically adopts a layered distributed architecture. From the bottom layer to the top layer, it can be roughly divided into a perception layer, a control layer, a coordination layer, and an interaction layer. The layers communicate with each other through an in-vehicle network.

[0189] The perception layer mainly consists of various sensors distributed inside and outside the vehicle, including but not limited to external environment cameras, millimeter-wave radar, lidar, ultrasonic sensors, in-vehicle driver monitoring cameras, microphone arrays, and various vehicle status sensors (such as wheel speed sensors, inertial measurement units, temperature sensors, etc.). The perception layer is responsible for collecting multi-dimensional data such as the vehicle's own operating status, driver behavior, and external driving environment in real time.

[0190] The control layer consists of dozens to hundreds of electronic control units (ECUs), distributed across multiple functional domains including powertrain, chassis, body, intelligent driving, and infotainment. Each ECU embeds real-time control software that performs closed-loop control of the vehicle's actuators based on preset control strategies or upper-level commands, and generates corresponding alarm signals when abnormal conditions are detected. Typical ECUs include the engine control unit, transmission control unit, brake control unit, steering control unit, vehicle stability control unit, airbag control unit, intelligent driving domain controller, and in-vehicle infotainment unit.

[0191] The coordination layer typically exists in the form of a domain controller or a central computing platform, responsible for cross-domain data fusion, global state management, and collaborative decision-making. The coordination layer centrally processes and schedules the sensing data and control commands that were originally scattered across various functional domains, connecting downwards to various electronic control units and supporting human-machine interaction functions upwards.

[0192] The interaction layer mainly includes in-cabin display devices (such as instrument panel, central control screen, head-up display), voice interaction system, haptic feedback device, etc., which are responsible for presenting vehicle status, warning information and driving suggestions to the driver in the form of visual, auditory or tactile, while receiving the driver's touch, voice and other input commands.

[0193] Data transmission and interaction between different layers are achieved through the vehicle bus network. Common vehicle bus protocols include CAN, CAN FD, LIN, FlexRay, and vehicle Ethernet, which supports high-bandwidth data transmission. Among them, CAN and CAN FD buses are widely used for communication in real-time control domains such as powertrain and chassis, while vehicle Ethernet is gradually being applied to high-bandwidth sensor data transmission in the intelligent driving domain and multimedia interaction scenarios in the cockpit domain.

[0194] In some possible examples, the cockpit domain controller, as the core of the in-vehicle computing platform, is equipped with a processor and memory to execute the method for adjusting the light transmittance of the vehicle window glass provided in the embodiments of this application.

[0195] For example, the light transmittance adjustment device for the vehicle window glass of this application is arranged in the cockpit domain controller. The specific structure of the cockpit domain controller is as follows: Figure 1 As shown.

[0196] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A method for adjusting the light transmittance of a vehicle window, characterized in that, The method includes: When it is determined that the vehicle will enter or exit the tunnel after the first hour, the adjustment parameters for the light transmittance of the vehicle window glass are determined. Adjust the light transmittance of the vehicle window glass according to the aforementioned adjustment parameters; The adjustment parameter is configured such that the light transmittance of the vehicle window glass is adjusted to the target light transmittance when the vehicle arrives at the tunnel entrance.

2. The method for adjusting the light transmittance of vehicle window glass according to claim 1, characterized in that, Also includes: Obtain the vehicle's real-time location, speed, and road map information ahead; The time when the vehicle enters or exits the tunnel is determined based on the vehicle's real-time location, speed, and road map information ahead.

3. The method for adjusting the light transmittance of vehicle window glass according to claim 1, characterized in that, The adjustment parameters for determining the light transmittance of the vehicle window glass include: The adjustment parameters for the light transmittance of the vehicle window glass are determined according to preset parameters, which include at least one of the following: vehicle speed, distance of the vehicle from the tunnel entrance, length of the tunnel, weather condition parameters, and ambient brightness parameters.

4. The method for adjusting the light transmittance of vehicle window glass according to claim 1, characterized in that, The vehicle window glass is a windshield, and the method further includes: When the time it takes for a vehicle to enter or exit the tunnel is less than the second time, the light transmittance of the windshield is adjusted at a second rate to a light transmittance that is compatible with the external light intensity. The adjustment parameters include the adjustment start time, which is earlier than the time when the time it takes for the vehicle to enter or exit the tunnel is less than the second time.

5. The method for adjusting the light transmittance of vehicle window glass according to claim 4, characterized in that, The rate at which the light transmittance of the vehicle window glass is adjusted according to the adjustment parameters is a first rate, and the first rate is less than the second rate.

6. The method for adjusting the light transmittance of vehicle window glass according to claim 1, characterized in that, The vehicle windows are divided into windshield, side windows, and sunroof according to their functional areas. The adjustment parameters for determining the light transmittance of the vehicle windows include: The adjustment parameters for the light transmittance of the vehicle window glass are determined according to the functional area to which the window glass belongs.

7. The method for adjusting the light transmittance of vehicle window glass according to claim 6, characterized in that, The adjustment parameters include the start-up timing, target transmittance, and adjustment rate. The adjustment of the windshield is initiated earlier than the adjustment of the side windows and / or sunroof. The target light transmittance of the windshield is less than the target light transmittance of the side window glass and / or sunroof glass; The adjustment rate of the side window glass and / or the sunroof glass is less than the maximum adjustment rate of the windshield.

8. The method for adjusting the light transmittance of vehicle window glass according to any one of claims 1 to 7, characterized in that, The vehicle window is a windshield, and the adjustment of the light transmittance of the vehicle window is initiated when the light at the tunnel exit is detected.

9. The method for adjusting the light transmittance of vehicle window glass according to any one of claims 1 to 7, characterized in that, Also includes: Acquire forward-looking environmental perception data; during the process of adjusting the light transmittance of the windshield glass according to the adjustment parameters, calibrate the target light transmittance or light transmittance adjustment rate of the windshield glass based on the forward-looking environmental perception data. and / or Acquire in-vehicle illumination data; during the process of adjusting the light transmittance of the vehicle window glass according to the adjustment parameters, calibrate the target light transmittance or light transmittance adjustment rate of the side window and / or the sunroof based on the forward environmental perception data.

10. The method for adjusting the light transmittance of vehicle window glass according to any one of claims 1 to 7, characterized in that, Also includes: Within three hours after the vehicle enters the tunnel, the light transmittance of the vehicle window glass is adjusted according to the lighting environment inside the tunnel. After the vehicle has been in the tunnel for three hours, and before the adjustment is initiated when the vehicle exits the tunnel, the light transmittance of the side windows and / or the sunroof is maintained, and the light transmittance of the windshield is adjusted according to the lighting environment inside the tunnel and / or the length of the tunnel.

11. A device for adjusting the light transmittance of a vehicle window, characterized in that, For use in vehicles, the device for adjusting the light transmittance of the vehicle window glass includes: The determination module is used to determine the adjustment parameters of the light transmittance of the vehicle window glass when it is determined that the vehicle will enter or exit the tunnel after a first time period; An adjustment module is used to adjust the light transmittance of the vehicle window glass according to the adjustment parameters. The adjustment parameter is configured such that the light transmittance of the vehicle window glass is adjusted to the target light transmittance when the vehicle arrives at the tunnel entrance.

12. A control device, characterized in that, include: Memory and processor; the memory and processor are coupled; The memory is used to store computer programs; When the processor executes the computer program, it implements the method for adjusting the light transmittance of the vehicle window glass as described in any one of claims 1 to 10.

13. A computer-readable storage medium, characterized in that, include: The computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the method for adjusting the light transmittance of the vehicle window glass as described in any one of claims 1 to 10.

14. A computer program product, characterized in that, include: The computer program product includes computer program instructions, which, when executed by a processor, implement the method for adjusting the light transmittance of the vehicle window glass as described in any one of claims 1 to 10.

15. A vehicle, characterized in that, include: The device for adjusting the light transmittance of vehicle window glass as described in claim 11; or The control device as described in claim 12; or The computer-readable storage medium as claimed in claim 13; or The computer program product as described in claim 14.

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