Vehicle instrument screen and central control screen brightness consistency calibration method and system

Abstract

The present application provides a kind of vehicle instrument screen and central control screen brightness consistency calibration method and system, it is related to automobile electronics and intelligent cockpit technical field.The present application is in the vehicle production off-line link, through simulating standard driver eye point position, objective, accurate collaborative brightness measurement and compensation are carried out to instrument screen and central control screen, ensure the brightness perception consistency of double screen from source.In the vehicle use link, convenient personalized brightness calibration entry is provided for user, allows user to fine tune and permanently save according to given standard dimming curve according to own preference, realizes the deep matching of system automatic dimming and user subjective feeling.The present application can solve the problem of brightness perception inconsistency of double screen caused by hardware difference, assembly tolerance and different observation angle of human eye, and provide personalized brightness optimization scheme that user can participate.

Description

Technical Field

[0001] This invention relates to the field of automotive electronics and smart cockpit technology, specifically to a method and system for calibrating the brightness consistency of a vehicle's instrument panel and central control screen. Background Technology

[0002] With the development of automotive intelligence, large-size, high-resolution instrument displays (such as LCD instrument panels) and central control displays have become standard equipment in modern cars. To improve driving comfort and safety, these displays generally integrate automatic ambient light dimming functions: they sense ambient brightness through ambient light sensors installed in the cabin and automatically adjust the screen backlight brightness according to a preset dimming curve.

[0003] However, existing technologies have the following inherent drawbacks in practical applications: 1. Brightness discrepancies due to hardware inconsistencies: The instrument panel and the central control screen often come from different suppliers or use different models of display modules. Their backlight systems, optical films, and driver chips have inherent design and manufacturing tolerances. Furthermore, the ambient light sensor itself has sensitivity variations, and its installation location (such as on the dashboard, below the windshield, or in the roof) causes a difference between the perceived lighting environment and the actual lighting environment for the driver's eyes. These factors combined result in a significant difference between the actual output brightness of the two screens and the brightness perceived by the driver, even with the same ambient light sensor readings.

[0004] 2. Uncompensated viewing angle differences: The driver's viewing angle when observing the instrument panel (usually a top-down view) is completely different from when observing the center console screen (nearly horizontal or slightly downward). Due to the viewing angle characteristics of the screens (such as the brightness decay curve with viewing angle), even if the brightness measured in the frontal normal direction of both screens is the same, the perceived brightness observed by the driver from the actual eye point in the driving position will be significantly different. The existing system completely ignores this ergonomic factor.

[0005] 3. Lack of personalized adaptive capability: The preset auto-dimming curve is based on a "standard driver" model and cannot adapt to users of different ages (such as the degree of yellowing of the lens), different visual habits, or special preferences. Although users can adjust it manually temporarily, this setting cannot be integrated with the auto-dimming logic, nor can it be saved in the long term. It may become invalid after each power cycle or mode switch, resulting in a disjointed experience.

[0006] 4. Limitations and high costs of production line calibration: Traditional production line calibration may only perform simple brightness meter checks on a single screen, or rely on workers' subjective judgment, which is inefficient, inconsistent, and cannot perform collaborative calibration of dual screens from a real driving perspective. Summary of the Invention

[0007] The purpose of this invention is to provide a method and system for calibrating the brightness consistency of a vehicle's instrument panel and central control screen, which solves the problem of inconsistent brightness perception between the two screens caused by hardware differences, assembly tolerances, and different viewing angles of the human eye, and provides a personalized brightness optimization scheme that users can participate in.

[0008] To achieve the above objectives, in a first aspect, the present invention provides a method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen, comprising: Step 1: Control the instrument panel and the central control screen to display multiple standard test screens respectively, and simultaneously obtain the actual brightness value of the instrument panel and the central control screen at the standard driver's eye position and the illuminance inside the vehicle; Step 2: Based on the actual brightness value and the illuminance inside the vehicle, calculate the brightness deviation between the instrument panel and the central control screen, and generate brightness compensation parameter sets for the instrument panel and the central control screen respectively, in conjunction with the given standard dimming curve. Step 3: In response to the user's personalized calibration command, adjust the brightness of the instrument panel and the central control screen under various typical ambient light scenarios until the brightness of the instrument panel and the central control screen reaches a comfortable and coordinated state as observed by the user, and obtain the personalized dimming curve corresponding to the user. Step 4: During actual vehicle operation, based on the brightness compensation parameter set, standard dimming curve and / or personalized dimming curve, generate the final dimming curve. According to the final dimming curve and the current actual illuminance inside the vehicle, determine the brightness of the instrument panel and the central control screen respectively, so as to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a way that is both coordinated and in line with user preferences.

[0009] According to the present invention, a method for calibrating the brightness consistency of a vehicle instrument panel and a central control screen is provided. In step 1, the actual brightness values ​​of the instrument panel and the central control screen at the standard driver's eye position are obtained synchronously by an imaging luminance meter.

[0010] According to the present invention, a method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen, prior to step 1, the method further includes: At the vehicle assembly line testing station, the imaging luminance meter is positioned at the standard driver eye position preset for that vehicle model. According to the present invention, a method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen includes a brightness compensation parameter set comprising: a gain coefficient table for different ambient light ranges, a brightness offset, or a lookup table for correcting a standard dimming curve. According to the method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen provided by the present invention, step 2 further includes: encrypting and writing the brightness compensation parameter set into the vehicle's non-volatile memory to complete the factory-level one-time calibration.

[0011] According to the method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen provided by the present invention, in step 3, various typical ambient light scenarios are achieved by controlling the interior lights or changing the parking position. According to the present invention, a method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen includes step 3, which obtains a personalized dimming curve corresponding to the user, including: Record the brightness of the instrument panel and central control screen that the user finally selects under multiple ambient light reference points in each typical ambient light scenario to obtain multiple data points; use multiple data points to generate a personalized dimming curve that belongs to the user through interpolation or curve fitting algorithms. According to the method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen provided by the present invention, step 3 further includes: binding the personalized dimming curve with the corresponding user's vehicle account and storing it on the vehicle or in the cloud. According to the present invention, a method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen, step 4 specifically includes: During actual vehicle operation, the actual illuminance inside the vehicle is collected in real time. Detect whether the current user has a corresponding personalized dimming curve; If it is detected that there is no corresponding personalized dimming curve for the current user, the given standard dimming curve is corrected based on the brightness compensation parameter set, and the final dimming curve is obtained after correction. If a personalized dimming curve is detected for the current user, then the intelligent blending strategy is executed: If the actual illuminance inside the vehicle is within the ambient light range that the user has calibrated, the personalized dimming curve corresponding to the current user will be used as the final dimming curve; if the actual illuminance inside the vehicle is not within the ambient light range that the user has calibrated, the final dimming curve will be a smooth transition from the personalized dimming curve to the standard dimming curve; or, the personalized dimming curve and the standard dimming curve will be weighted and averaged to generate the final dimming curve. Based on the final dimming curve and the actual illuminance inside the vehicle, the backlight control values ​​for the instrument panel and the central control screen are calculated and sent to their respective backlight drive circuits to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a way that is both coordinated and in line with user preferences. Secondly, the present invention provides a brightness consistency calibration system for vehicle instrument panel and central control screen, comprising: The data acquisition module is used to control the instrument panel and the central control screen to display multiple standard test screens respectively, and to simultaneously acquire the actual brightness value of the instrument panel and the central control screen at the standard driver's eye position and the illuminance inside the vehicle. The compensation module is used to calculate the brightness deviation between the instrument panel and the central control screen based on the actual brightness value and the illuminance inside the vehicle, and generate brightness compensation parameter sets for the instrument panel and the central control screen respectively in combination with the given standard dimming curve. The personalized calibration module is used to respond to the user's personalized calibration commands and adjust the brightness of the instrument panel and the central control screen under various typical ambient light scenarios until the brightness of the instrument panel and the central control screen reaches a comfortable and coordinated state as observed by the user, thus obtaining a personalized dimming curve corresponding to the user. The adjustment module is used to generate a final dimming curve based on a set of brightness compensation parameters, a standard dimming curve, and / or a personalized dimming curve when the vehicle is actually running. Based on the final dimming curve and the actual illuminance inside the vehicle, the brightness of the instrument panel and the central control screen are determined respectively, so as to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a way that is both coordinated and in line with user preferences.

[0012] Compared with the prior art, the present invention has at least the following technical effects: 1. Fundamentally solves the problem of perceptual inconsistency: By measuring and compensating from the perspective of real driving during the off-line process, the system-level brightness perception deviation caused by hardware and viewing angle differences is eliminated for the first time, significantly improving visual quality and the sense of luxury.

[0013] 2. Revolutionary Enhancement in User Experience: Transforming one-off, passive brightness adjustments into a sustainable, proactive, and personalized optimization process. The system "remembers" user preferences, achieving an intelligent experience that becomes more considerate with use, greatly enhancing user satisfaction.

[0014] 3. Improve mass production quality and efficiency: The fully automated off-line calibration process replaces the traditional, inefficient, and subjective manual inspection, ensuring that every vehicle leaving the factory has a highly consistent display effect.

[0015] 4. Enhanced driving safety: The optimized brightness is more in line with the driver's personal visual perception, reducing distraction and visual fatigue caused by sudden screen brightness being too bright or too dim, or brightness conflicts between two screens, thus indirectly improving driving safety.

[0016] 5. System compatibility and forward-looking approach: The solution framework does not rely on specific screen technologies (LCD / OLED / Mini-LED), can adapt to future cockpit display development trends such as multi-screen, connected screens, and irregularly shaped screens, and can continuously upgrade and calibrate algorithms through software OTA. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] In the attached diagram: Figure 1 This is a flowchart of the brightness consistency calibration method for vehicle instrument panel and central control screen according to the present invention; Figure 2 This is a schematic diagram of the automatic calibration station layout and eyepoint simulation for vehicles off the production line according to the present invention. Figure 3 This is a schematic diagram of the interface for users to perform personalized brightness calibration via the central control screen according to the present invention; Figure 4 This is a comparative diagram of the standard dimming curve, the personalized dimming curve, and the final dimming curve of this invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] The following detailed description of some embodiments of the present invention will be provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] Please see Figure 1 This invention provides a method for calibrating the brightness consistency of dual screens in a vehicle, comprising the following steps: Step 1: Control the instrument panel and the central control screen to display multiple standard test screens respectively, and simultaneously obtain the actual brightness value of the instrument panel and the central control screen at the standard driver's eye position and the illuminance inside the vehicle; Step 2: Based on the actual brightness value and the illuminance inside the vehicle, calculate the brightness deviation between the instrument panel and the central control screen, and generate brightness compensation parameter sets for the instrument panel and the central control screen respectively, in conjunction with the given target brightness-ambient light curve. Step 3: In response to the user's personalized calibration command, adjust the brightness of the instrument panel and the central control screen under various typical ambient light scenarios until the brightness of the instrument panel and the central control screen observed by the user reaches a comfortable and coordinated state, and obtain the user's preferred brightness-ambient light curve. Step 4: During actual vehicle operation, based on the brightness compensation parameter set, target brightness-ambient light curve and / or preferred brightness-ambient light curve, generate the final dimming curve. According to the final dimming curve and the current actual illuminance inside the vehicle, determine the brightness of the instrument panel and the central control screen respectively, so as to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a way that is both coordinated and in line with user preferences.

[0022] It should be noted that the vehicle dual-screen brightness consistency calibration method provided by this invention mainly includes the following two major steps: 1. During the vehicle production line rollout process, by simulating the standard driver's eye position, objective and accurate collaborative brightness measurement and compensation are performed on the instrument panel and central control screen to ensure consistent brightness perception between the two screens from the source.

[0023] 2. During vehicle use, provide users with a convenient personalized brightness calibration entry, allowing users to fine-tune the given standard dimming curve according to their own preferences and save it permanently, so as to achieve a deep match between the system's automatic dimming and the user's subjective experience.

[0024] In some embodiments, the present invention provides a method for calibrating the brightness consistency of dual screens in a vehicle, which specifically includes the following stages: S1: Automatic calibration phase after offline operation Eyepoint simulation and data acquisition: such as Figure 2 As shown, at the vehicle assembly line inspection station, a high-precision robotic arm precisely positions an imaging luminance meter (such as a color CCD luminance camera) to the standard driver eye position preset for the vehicle model (for example, the 95th percentile male eye ellipse area as defined by the SAE J941 standard).

[0025] Multi-condition brightness acquisition: The instrument panel and central control screen respectively display a series of standard test images (such as full white field, multi-level grayscale images), and the actual brightness values ​​(unit: cd / m²) of the two screens at the standard driver's eye position are simultaneously acquired by the imaging luminance meter. 2 Simultaneously, the vehicle's interior illuminance is read.

[0026] It should be noted that one or more ambient light sensors pre-placed inside the vehicle can be used to obtain the interior illuminance. If a single ambient light sensor is used, it is typically positioned at the front of the vehicle to obtain the interior illuminance. If multiple ambient light sensors are used, the illuminance values ​​from these sensors are weighted and averaged according to their different locations to obtain the final interior illuminance. For example, the illuminance value obtained from the ambient light sensor at the front of the vehicle generally has a higher weight than the illuminance value obtained from the ambient light sensor on the roof. Of course, the specific methods for obtaining the interior illuminance are existing technologies and will not be elaborated upon here.

[0027] Furthermore, this imaging luminance meter has a color analysis function, which can simultaneously collect luminance and chromaticity information, thereby ensuring white balance consistency when compensating for luminance.

[0028] Compensation parameter calculation: Based on the collected actual brightness values ​​and the illuminance inside the vehicle, the brightness deviation between the two screens is calculated, and combined with the target brightness-ambient light curve (i.e., the factory-preset standard dimming curve), a brightness compensation parameter set for each screen is generated. This brightness compensation parameter set includes, but is not limited to: gain coefficient tables for different ambient light ranges, brightness offsets, or lookup tables for correcting the standard dimming curve.

[0029] Furthermore, in the calculation of compensation parameters, machine learning models can be used to dynamically estimate compensation by taking into account aging factors such as screen temperature and usage time.

[0030] Parameter burning: The generated brightness compensation parameter set is encrypted and written into the non-volatile memory of the vehicle display control unit to complete the factory-level one-time calibration.

[0031] S2: User Personalization Calibration Phase Mode Trigger: Users can enter "Advanced Brightness Calibration Mode" through a dedicated settings menu, shortcut controls, or voice commands (such as "calibrate screen brightness") on the central control screen.

[0032] Guidance and Adjustment: The system guides users to park the vehicle in a well-lit environment. To obtain more comprehensive calibration data, the system can automatically or guide users to independently or in conjunction with the brightness of the instrument panel and the central control screen under various typical ambient light scenarios (such as low, medium, and high illuminance levels). This can be achieved by controlling the interior lights or prompting the user to change the parking position. Users can continuously adjust the brightness of the two screens using sliders or voice commands until the brightness of the two screens appears comfortable and harmonious to the user.

[0033] like Figure 3 The image shows the interface for users to enter the personalized brightness calibration mode via the central control screen. The interface displays the current ambient light conditions, independent brightness adjustment sliders for both screens, the current brightness value, a consistency prompt (a warning sign is displayed when the brightness difference between the two screens is too large), and navigation buttons.

[0034] Preference learning and curve generation: The system records the dual-screen brightness values ​​finally selected by the user under multiple ambient light reference points in each typical ambient light scene, obtaining multiple data points. Using these data points, an interpolation or curve fitting algorithm (such as polynomial fitting, piecewise linear fitting) is used to generate a personalized dimming curve ("ambient light - preferred brightness" relationship curve) belonging to the user.

[0035] Preference saving and binding: The generated personalized dimming curve is bound to the user's vehicle account (or driver profile) and stored on the vehicle or in the cloud. Subsequently, when the user uses the vehicle, the system will automatically recall their personalized dimming curve.

[0036] Specifically, during the user's personalized calibration process, the system can provide "consistency assistance" visual cues. For example, when the brightness difference between the two screens exceeds the comfort threshold, the adjustment slider of one of the screens will be highlighted. In addition, the personalized dimming curve supports cloud synchronization via OTA (Over-the-Air Technology), so when a user changes to a new car or uses different vehicles under the same account, the preference settings can be automatically migrated.

[0037] S3: Real-time brightness blending control stage During normal vehicle operation, the ambient light sensor collects the actual illuminance inside the vehicle in real time.

[0038] The display control unit reads the factory-set brightness compensation parameter set written in stage S1 and checks whether the current user has the corresponding personalized dimming curve saved in stage S2. The corresponding control strategy is as follows: If it is detected that the current user does not have a corresponding personalized dimming curve, the standard dimming curve corrected by the brightness compensation parameter set at the factory will be applied directly. That is, the given standard dimming curve will be corrected based on the brightness compensation parameter set, and the final dimming curve will be obtained after correction.

[0039] If a personalized dimming curve is detected for the current user, then the intelligent blending strategy is executed: If the actual illuminance inside the vehicle is within the ambient light range calibrated by the user, the personalized dimming curve corresponding to the current user will be used as the final dimming curve. If the actual illuminance inside the vehicle is not within the ambient light range calibrated by the user, the final dimming curve will be a smooth transition from the personalized dimming curve to the standard dimming curve; alternatively, a weighted average of the personalized dimming curve and the standard dimming curve will be used to generate the final dimming curve. The weights of each component in the weighted average will be determined based on the actual situation.

[0040] like Figure 4 The diagram shows a comparison of the standard dimming curve, the personalized dimming curve, and the final dimming curve. It illustrates the comparison of the three dimming curves: the factory-preset standard dimming curve, the personalized dimming curve with a darker user preference, and the final dimming curve generated through an intelligent fusion strategy. Figure 4 The image clearly shows how the fusion curve balances standard values ​​and user preferences in different ambient light ranges.

[0041] Independent drive: Based on the final dimming curve and the actual illuminance inside the vehicle, the independent backlight control values ​​(PWM duty cycle or voltage value) of the instrument panel and the central control screen are calculated separately and sent to their respective backlight drive circuits to achieve automatic adjustment of the brightness of the two screens in a coordinated manner and in accordance with user preferences.

[0042] Preferably, the backlight control value can also be adjusted based on the current display content of the instrument panel and the central control screen (such as night mode, navigation interface, etc.), for example, higher brightness is required in night mode or navigation interface.

[0043] Based on the same inventive concept, another embodiment of the present invention provides a brightness consistency calibration system for vehicle instrument panel and central control screen, used to implement the brightness consistency calibration method for vehicle instrument panel and central control screen of the aforementioned embodiment. The system includes: The data acquisition module is used to control the instrument panel and the central control screen to display multiple standard test screens respectively, and to simultaneously acquire the actual brightness value of the instrument panel and the central control screen at the standard driver's eye position and the illuminance inside the vehicle. The compensation module is used to calculate the brightness deviation between the instrument panel and the central control screen based on the actual brightness value and the illuminance inside the vehicle, and generate brightness compensation parameter sets for the instrument panel and the central control screen respectively in combination with the given standard dimming curve. The personalized calibration module is used to respond to the user's personalized calibration commands and adjust the brightness of the instrument panel and the central control screen under various typical ambient light scenarios until the brightness of the instrument panel and the central control screen reaches a comfortable and coordinated state as observed by the user, thus obtaining a personalized dimming curve corresponding to the user. The adjustment module is used to generate a final dimming curve based on a set of brightness compensation parameters, a standard dimming curve, and / or a personalized dimming curve when the vehicle is actually running. Based on the final dimming curve and the actual illuminance inside the vehicle, the brightness of the instrument panel and the central control screen are determined respectively, so as to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a way that is both coordinated and in line with user preferences.

[0044] The following are specific embodiments of the present invention.

[0045] Taking a certain electric vehicle model as an example, it is equipped with a 12.3-inch rectangular instrument panel and a 15-inch OLED central control screen. The method of this invention is used to calibrate the brightness consistency of the two screens as follows: 1. Offline Calibration: At the end of the final assembly line, a robotic arm carrying a brightness camera moves to the eyepoint coordinates (X=650mm, Y=-300mm, Z=700mm, relative to the vehicle's design origin). The brightness camera simultaneously measures the brightness of both screens displaying pure white (RGB255, 255, 255). The measured brightness of the center of the instrument panel is 400 cd / m². 2 The center brightness of the central control screen is 480 cd / m². 2If the system objective is for both to be consistent, then the calculated gain compensation coefficient for the central control screen is 400 / 480≈0.833. This coefficient is written into the register of the central control screen driver module.

[0046] 2. User Calibration: Mr. Wang, the car owner, felt that the automatic brightness was still too bright in the underground parking garage at night (ambient light approximately 5 lux). He used voice commands to enter the personalized calibration mode and adjusted the brightness of both screens from the system's automatic setting of 60 cd / m². 2 Reduced to 35 cd / m 2 He saved the settings. The following afternoon, under a tree on a sunny day (ambient light approximately 10,000 lux), he felt the screen was too dark and recalibrated it to his preferred brightness of 180 cd / m². 2 Based on these two data points, the system generates a personalized dimming curve for Mr. Wang that is located below the standard dimming curve.

[0047] 3. Daily Use: When Mr. Wang is driving, the system recognizes his account and activates his personalized dimming curve. In the underground parking garage at night, the screen automatically adjusts to 35 cd / m². 2 Low brightness on the left and right sides; under clear skies, approximately 180 cd / m². 2 The brightness is moderate. When family members are driving, the default standard dimming curve is used, so there is no interference.

[0048] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. It should be understood that the invention is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for calibrating the brightness consistency between a vehicle instrument panel and a central control screen, characterized in that, include: Step 1: Control the instrument panel and the central control screen to display multiple standard test screens respectively, and simultaneously acquire the actual brightness value of the instrument panel and the central control screen at the standard driver's eye position and the illuminance inside the vehicle; Step 2: Based on the actual brightness value and the illuminance inside the vehicle, calculate the brightness deviation between the instrument panel and the central control screen, and generate brightness compensation parameter sets for the instrument panel and the central control screen respectively, in conjunction with the given standard dimming curve. Step 3: In response to the user's personalized calibration command, adjust the brightness of the instrument panel and the central control screen under various typical ambient light scenarios until the brightness of the instrument panel and the central control screen reaches a comfortable and coordinated state as observed by the user, and obtain the personalized dimming curve corresponding to the user. Step 4: During actual vehicle operation, based on the brightness compensation parameter set, standard dimming curve and / or personalized dimming curve, generate the final dimming curve. According to the final dimming curve and the current actual illuminance inside the vehicle, determine the brightness of the instrument panel and the central control screen respectively, so as to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a way that is both coordinated and in line with user preferences.

2. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 1, characterized in that, In step 1, the actual brightness values ​​of the instrument panel and the central control screen at the standard driver's eye level are simultaneously obtained by an imaging luminance meter.

3. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 2, characterized in that, Prior to step 1, the method further includes: At the vehicle assembly line testing station, the imaging luminance meter is positioned at the standard driver eye position preset for that vehicle model.

4. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 1, characterized in that, The brightness compensation parameter set includes: a gain coefficient table for different ambient light ranges, brightness offset, or a lookup table for correcting standard dimming curves.

5. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 1, characterized in that, Step 2 further includes: encrypting and writing the brightness compensation parameter set into the vehicle's non-volatile memory to complete the factory-level one-time calibration.

6. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 1, characterized in that, In step 3, various typical ambient light scenarios are achieved by controlling the in-vehicle lights or changing the parking position.

7. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 1, characterized in that, In step 3, the personalized dimming curve corresponding to the user is obtained, including: Record the brightness of the instrument panel and central control screen that the user finally selects under multiple ambient light reference points in each typical ambient light scenario to obtain multiple data points; use the multiple data points to generate a personalized dimming curve that belongs to the user through interpolation or curve fitting algorithms.

8. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 1, characterized in that, Step 3 further includes: binding the personalized dimming curve to the corresponding user's vehicle account and storing it on the vehicle or in the cloud.

9. The method for calibrating the brightness consistency between the vehicle instrument panel and the central control screen according to claim 1, characterized in that, Step 4 specifically includes: During actual vehicle operation, the actual illuminance inside the vehicle is collected in real time. Detect whether the current user has a corresponding personalized dimming curve; If it is detected that the current user does not have a corresponding personalized dimming curve, the given standard dimming curve is corrected based on the brightness compensation parameter set, and the final dimming curve is obtained after correction. If a personalized dimming curve is detected for the current user, then the intelligent blending strategy is executed: If the actual illuminance inside the vehicle is within the ambient light range that the user has calibrated, the personalized dimming curve corresponding to the current user will be used as the final dimming curve; if the actual illuminance inside the vehicle is not within the ambient light range that the user has calibrated, the final dimming curve will be a smooth transition from the personalized dimming curve to the standard dimming curve; or, the personalized dimming curve and the standard dimming curve will be weighted and averaged to generate the final dimming curve. Based on the final dimming curve and the actual illuminance inside the vehicle, the backlight control values ​​for the instrument panel and the central control screen are calculated and sent to their respective backlight drive circuits, so as to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a way that is both coordinated and in line with user preferences.

10. A brightness consistency calibration system for vehicle instrument panel and central control screen, characterized in that, include: The data acquisition module is used to control the instrument panel and the central control screen to display multiple standard test screens respectively, and to simultaneously acquire the actual brightness value of the instrument panel and the central control screen at the standard driver's eye position and the illuminance inside the vehicle. The compensation module is used to calculate the brightness deviation between the instrument panel and the central control screen based on the actual brightness value and the illuminance inside the vehicle, and generate brightness compensation parameter sets for the instrument panel and the central control screen respectively in combination with the given standard dimming curve. The personalized calibration module is used to respond to the user's personalized calibration commands and adjust the brightness of the instrument panel and the central control screen under various typical ambient light scenarios until the brightness of the instrument panel and the central control screen reaches a comfortable and coordinated state as observed by the user, thus obtaining a personalized dimming curve corresponding to the user. The adjustment module is used to generate a final dimming curve based on the brightness compensation parameter set, standard dimming curve and / or personalized dimming curve when the vehicle is actually running. Based on the final dimming curve and the actual illuminance inside the vehicle, the brightness of the instrument panel and the central control screen are determined respectively, so as to achieve automatic adjustment of the brightness of the instrument panel and the central control screen in a coordinated manner and in accordance with user preferences.

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