Mini LED-based local display method

Abstract

The invention relates to the technical field of display screens, in particular to a local display method based on Mini LEDs. The method comprises the following steps: acquiring an environment influence parameter set and a display screen parameter set, analyzing the environment influence parameter set and the display screen parameter set, and determining a real-time influence feature information set; obtaining display content data, analyzing the display content data based on the real-time influence feature information set, and determining real-time visibility demand information; and based on the display screen parameter set, according to the real-time visibility demand information, carrying out local display effect adjustment on the display screen, and outputting adjusted display information. According to the method and the device, a driver can quickly extract the adjusted display information of the key information in the vehicle driving process, dynamic local adaptive adjustment on the display effect of the vehicle-mounted display screen in complex environment change caused by vehicle driving is realized, the information transmission effect of the vehicle-mounted display screen is improved, and the use body feeling of a user is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of display screens, and in particular to a local display method based on Mini LED. Background Art

[0002] Mini LED is a new type of backlight technology. Through the partition independent dimming mechanism, compared with the traditional LED backlight technology, it can control the display backlight source more precisely, achieve richer color levels and a wider color gamut, making the display effect more real and delicate. It is widely used in various display devices and has become a new trend in the development of display technology.

[0003] However, the existing in-vehicle display screens based on Mini LED technology are difficult to achieve dynamic local adjustment of the display effect in the complex environmental changes caused by vehicle driving, resulting in poor information transmission effect of the display screen and poor user experience. Summary of the Invention

[0004] This application provides a local display method based on Mini LED to solve the above technical problems.

[0005] In a first aspect, this application provides a local display method based on Mini LED, and the method includes: Obtain an environmental impact parameter set and a display screen parameter set, analyze the environmental impact parameter set and the display screen parameter set, and determine a real-time impact feature information set; Obtain display content data, and based on the real-time impact feature information set, analyze the display content data to determine real-time visibility requirement information; Based on the display screen parameter set, according to the real-time visibility requirement information, adjust the local display effect of the display screen and output the adjusted display information.

[0006] Through this solution, the environmental impact parameter set and the display screen parameter set are comprehensively analyzed to analyze the comprehensive impact characteristics of light on the visual perception of the driver and the display effect of the screen in the current vehicle driving environment, and a real-time impact feature information set is obtained. On this basis, combined with the display content data, analyze the real-time visibility requirement information including the dimming of each partition of the display screen and the overall tone requirement required to ensure the visibility of key information in the display screen for the current driver, and use this as the adjustment basis. Combined with the display screen parameter set, adjust the local display effect of the display screen and output the adjusted display information that enables the driver to quickly extract key information during vehicle driving, realizing dynamic local adaptive adjustment of the display effect of the in-vehicle display screen in the complex environmental changes brought about by vehicle driving, improving the information transmission effect of the in-vehicle display screen, and ensuring the user experience.

[0007] Optionally, the set of environmental impact parameters includes real-time ambient light intensity change information, real-time vehicle position, current timestamp, windshield static parameter information, and in-vehicle layout information; The windshield static parameter information includes windshield transmittance parameters, windshield curvature parameters, and windshield reflection characteristic parameters; The set of display screen parameters includes the reference brightness of the display screen, display screen partition information, surface reflection characteristics of the display screen, and reference color temperature of the display screen; The set of real-time impact characteristic information includes human eye visual impact characteristics and screen display impact characteristics.

[0008] Through this solution, using the set of environmental impact parameters including real-time ambient light intensity change information, real-time vehicle position, current timestamp, windshield static parameter information, and in-vehicle layout information, comprehensively reflects the performance of environmental light in the vehicle. Using the set of display screen parameters including the reference brightness of the display screen, display screen partition information, surface reflection characteristics of the display screen, and reference color temperature of the display screen, improves the adaptability of subsequent light impact analysis and corresponding adjustment decision analysis to the display screen characteristics.

[0009] Optionally, analyzing the set of environmental impact parameters and the set of display screen parameters to determine the set of real-time impact characteristic information includes: Based on the current timestamp and the real-time vehicle position, determine the real-time external light projection angle; According to the ambient light intensity change information, combined with the windshield transmittance parameters, establish a light attenuation model to determine the actual light incident intensity after the external light passes through the windshield; Based on the windshield curvature parameters and the windshield reflection characteristic parameters, according to the real-time external light projection angle, construct a light refraction path characteristic map to analyze the light scattering distribution characteristics of the light in the vehicle after passing through the windshield at the current real-time external light projection angle; According to the in-vehicle layout information, extract the driving layout area and the display screen layout area; According to the actual light incident intensity and the light scattering distribution characteristics, analyze the degree of inhibition of the current light on the human eye visual reception ability in the driving layout area to determine the human eye visual impact characteristics; Based on the set of display screen parameters, according to the actual light incident intensity and the light scattering distribution characteristics, analyze the interference intensity and interference range of the current light on the display effect of the display screen in the display screen layout area to determine the screen display impact characteristics.

[0010] Through this solution, based on the current timestamp and the real-time position of the vehicle, the real-time external light projection angle during the driving of the vehicle is deduced. Based on the ambient light intensity change information and combined with the windshield light transmittance parameter, the attenuation of light passing through the windshield is analyzed to determine the actual light incident intensity. Further, combined with the windshield curvature parameter and the windshield reflection characteristic parameter, the light scattering distribution characteristic of light inside the vehicle is analyzed and determined. Based on the actual light incident intensity and the light scattering distribution characteristic, the human eye visual impact characteristic is determined, and combined with the display screen parameter set, the screen display impact characteristic is determined to characterize the dual impacts of light entering the vehicle on the human eye visual reception ability and the display effect of the display screen, improving the comprehensiveness and accuracy of subsequent local display adjustment.

[0011] Optionally, the analyzing the degree of inhibition of the current light on the human eye visual reception ability according to the light incident intensity and the light scattering distribution characteristic, and determining the human eye visual impact characteristic includes: Judging whether there is an overlap between the overlapping area of the driving layout area and the light scattering distribution characteristic and a preset driver's line of sight range; If there is an overlap, according to the actual light incident intensity, retrieve the preset pupil adjustment characteristic database to determine the corresponding pupil adjustment lag time under the current light intensity; According to the actual light incident intensity and the pupil adjustment lag time, determine a dynamic visual inhibition coefficient representing the degree of inhibition of the human eye visual reception ability by the current light, and use the dynamic visual inhibition coefficient as the human eye visual impact characteristic.

[0012] Through this solution, by accurately identifying the overlapping area, filtering out non-critical interferences, reducing the amount of invalid calculations, based on the overlapping characteristic between the driving layout area and the light scattering distribution characteristic, determining the corresponding pupil adjustment lag time under the current light intensity, and then quantitatively obtaining a dynamic visual inhibition coefficient representing the degree of inhibition of the human eye visual reception ability by the current light, and using the dynamic visual inhibition coefficient as the human eye visual impact characteristic, accurately quantifying the impact of the current light on the driver's visual reception ability.

[0013] Optionally, the analyzing the interference intensity and interference range of the current light on the display effect of the display screen according to the actual light incident intensity and the light scattering distribution characteristic based on the display screen parameter set, and determining the screen display impact characteristic includes: Based on the surface reflection characteristic of the display screen, analyze the reflection of the current light on the surface of the display screen according to the spatial relationship between the display screen layout area and the light scattering distribution characteristic, and generate a screen surface reflection spot distribution map; Analyze the impact of current light on the visibility decline of different display screen areas according to the reference brightness of the display screen and the reflected light spot distribution map, generate a heat map of the visibility decline distribution on the screen surface, and use the heat map of the visibility decline distribution on the screen surface as the display impact feature of the screen.

[0014] Through this solution, analyze the performance of the reflected light in each backlight partition on the display screen surface to obtain the reflected light spot distribution map. On this basis, combined with the reference brightness of the screen, analyze the impact of current light on the visibility decline of different display screen areas, generate a heat map of the visibility decline distribution on the screen surface, and use the heat map of the visibility decline distribution on the screen surface as the display impact feature of the screen, so as to scientifically quantify the negative impact caused by light on the in-vehicle screen surface and improve the accuracy of subsequent local screen adjustment.

[0015] Optionally, based on the real-time impact feature information set, analyze the display content data to determine the real-time visibility requirement information, including: Analyze the display content data according to the preset core element list, screen the core visual elements in the current display content, and determine the core element display area set; Based on the preset driver's line of sight range and the display screen layout area, analyze the core element display area set to determine the relative line of sight angle corresponding to each core element display area; Based on the backlight adjustment strategy, according to the relative line of sight angle, analyze the dynamic visual suppression coefficient and the heat map of the visibility decline distribution on the screen surface to determine the backlight adjustment information corresponding to each core element display area; Based on the hue reconstruction strategy, according to the relative line of sight angle, analyze the dynamic visual suppression coefficient and the heat map of the visibility decline distribution on the screen surface to determine the hue reconstruction information.

[0016] Through this solution, according to the preset core element list, screen the core visual elements in the display content, construct the core element display area set, reduce the interference of non-core elements, improve the pertinence of subsequent display adjustment to key information, and then improve the information transmission efficiency. By introducing the relative line of sight angle, the impact of the change in the line of sight angle on visual perception is introduced into the display adjustment analysis process, improving the comprehensiveness of subsequent display adjustment strategies. On this basis, based on the backlight adjustment strategy and the hue reconstruction strategy, analyze the dynamic visual suppression coefficient and the heat map of the visibility decline distribution on the screen surface, and determine the backlight adjustment information and the hue reconstruction information respectively, so as to improve the visibility of the display content from two dimensions of brightness and color.

[0017] Optionally, the backlight adjustment strategy includes: Analyze the display screen partition information according to the set of core element display areas, and determine a number of backlight partitions interfered by each core element display area and the corresponding basic backlight values; Determine the basic backlight adjustment value according to the basic backlight value and the corresponding dynamic visual suppression coefficient; Based on the basic backlight adjustment value, according to the visibility decay index corresponding to each backlight partition in the visibility decay distribution heat map on the screen surface, perform backlight correction on the basic backlight adjustment value to determine the partition backlight compensation value; Based on the partition backlight compensation value, according to the relative line-of-sight angle, use the bilinear interpolation algorithm to perform brightness smoothing on several backlight partitions corresponding to the boundaries of different core element display areas to determine the edge backlight adjustment value; Construct the backlight adjustment information according to the partition backlight compensation value and the edge backlight adjustment value.

[0018] Through this solution, according to the basic backlight value of the backlight partition interfering with the core element display area, by introducing the dynamic visual suppression coefficient, analyze the basic backlight adjustment value that the backlight partition needs to reach when the driver's vision is affected by light, improve the matching degree between the partition backlight brightness value and the degree of the driver's vision being affected. On this basis, further introduce the visibility decay index corresponding to each backlight partition, analyze the partition backlight compensation value that needs to be further corrected when the current backlight partition is affected by light, improve the matching degree between the partition backlight brightness value and the degree of the partition being affected, and at the same time, use the bilinear interpolation algorithm to perform brightness smoothing on several backlight partitions corresponding to the boundaries of different core element display areas, reducing the "halo" effect generated during the partition backlight adjustment process.

[0019] Optionally, the hue reconstruction strategy includes: Determine the contrast enhancement ratio of the backlight partitions interfered by each core element display area according to the non-linear mapping relationship between the visibility decay index and the screen contrast requirement; Based on the reference color temperature of the display screen, determine the color temperature adjustment ratio according to the positive correlation relationship between the dynamic visual suppression coefficient and the required display color temperature; Construct the hue reconstruction information according to the contrast enhancement ratio and the color temperature adjustment ratio.

[0020] Through this solution, starting from two dimensions of brightness contrast and color temperature, according to the non-linear mapping relationship between the visibility decay index and the screen contrast requirement, the contrast enhancement ratio required for the backlight zoning is determined, and according to the positive correlation between the dynamic vision suppression coefficient and the required display color temperature, the color temperature adjustment ratio required for the display content is determined, further improving the display effect of the local core display content, and then optimizing the efficiency and effect of the driver receiving key information from the display screen.

[0021] Optionally, the adjusting the local display effect of the display screen according to the real-time visibility requirement information based on the display screen parameter set and outputting the adjusted display information includes: Adjusting the backlight brightness value of the corresponding backlight zone according to the zoned backlight compensation value and the edge backlight adjustment value respectively; Performing a backlight brightness attenuation adjustment on the backlight zones that do not interfere with any of the core element display areas according to the contrast enhancement ratio; Based on the reference color temperature of the display screen, adjusting the color temperature of the display screen in real time according to the color temperature adjustment ratio.

[0022] Through this solution, the backlight brightness value of the corresponding backlight zone is adjusted according to the zoned backlight compensation value and the edge backlight adjustment value respectively, realizing the zoned adaptive adjustment of the backlight. By performing a decay process corresponding to the contrast enhancement ratio on the backlight in the display area outside the core element display area, the situation of "backlight overexposure" is avoided, and the visibility of the display content is improved. On the basis of the reference color temperature of the display screen, the color temperature of the display screen is increased in real time according to the color temperature adjustment ratio, so that the color temperature matches the intensity of the light received by the human eye, thereby improving the receiving speed of the driver for the display content.

[0023] Optionally, the method further includes: Monitoring the historical working parameter set of each backlight zone in real time; The historical working parameter set includes the zoned cumulative working time, the average brightness value and the peak brightness frequency; Based on a preset aging influence weight coefficient, performing a weighted evaluation on the historical working parameter set to generate a real-time aging degree evaluation value for each backlight zone; According to the real-time aging degree evaluation value, identifying a set of high-aging risk zones with the real-time aging degree evaluation value higher than a preset threshold, and extracting an adjacent set of candidate compensation zones; On the premise of meeting the real-time visibility requirement information corresponding to the current display content, performing dynamic load migration on the backlight brightness corresponding to the set of high-aging risk zones, distributing the brightness increment exceeding the basic backlight compensation value to the set of candidate compensation zones according to the principle of spatial proximity, and performing brightness compensation on the corresponding backlight zones through a timing alternation mechanism.

[0024] Through this solution, according to the historical working parameter set, the aging degree of each backlight zone is evaluated in real time. Based on this, through the spatial proximity principle and the time-sequential alternation mechanism, the backlight brightness of the high-aging-risk zones is dynamically migrated to improve the balance of the aging speed and aging degree between different backlight zones, and improve the consistency of the display effect of the display screen. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of an application scenario provided by an embodiment of the present application; Figure 2 It is a flowchart of a local display method based on Mini LED provided by an embodiment of the present application. Detailed Embodiments

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present application belong to the scope of protection of the present application.

[0028] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the front and back associated objects unless otherwise specified.

[0029] The following will further describe the embodiments of the present application in detail with reference to the drawings of the specification.

[0030] Existing vehicle-mounted display screens based on Mini LED technology are difficult to achieve dynamic local adjustment of the display effect in the complex environmental changes brought about by vehicle driving, resulting in poor information transmission effect of the display screen and poor user experience.

[0031] Based on this, the present application provides a local display method based on Mini LED. By comprehensively analyzing the environmental impact parameter set and the display screen parameter set, the comprehensive impact characteristics of light on the driver's visual perception and the screen display effect in the current vehicle driving environment are analyzed to obtain a real-time impact characteristic information set. On this basis, combined with the display content data, the real-time visibility requirement information including the dimming of each partition of the display screen and the overall color tone requirement for ensuring the visibility of key information in the display screen for the current driver is analyzed. Taking this as the adjustment basis and combined with the display screen parameter set, the local display effect of the display screen is adjusted, and the adjusted display information that enables the driver to quickly extract key information during vehicle driving is output, realizing dynamic local adaptive adjustment of the display effect of the in-vehicle display screen in the complex environmental changes brought about by vehicle driving, improving the information transmission effect of the in-vehicle display screen, and ensuring the user experience.

[0032] Figure 1 This is a schematic diagram of an application scenario provided by the present application. During the process of the in-vehicle display screen transmitting information, the method provided by the present application is applied to enable the driver to quickly extract the adjusted display information of key information during vehicle driving, realizing dynamic local adaptive adjustment of the display effect of the in-vehicle display screen in the complex environmental changes brought about by vehicle driving.

[0033] Specifically, the method of the present application is applied to any server, which communicates with the vehicle-mounted system, the display factory parameter recording unit, and the display screen rendering control system respectively. Through this server, the environmental impact parameter set provided by the vehicle-mounted system and the display factory parameter record provided by the display factory parameter recording unit are obtained, and the environmental impact parameter set and the display screen parameter set are comprehensively analyzed to analyze the comprehensive impact characteristics of light on the driver's visual perception and the screen display effect in the current vehicle driving environment, obtaining a real-time impact characteristic information set. On this basis, combined with the display content data provided by the display screen rendering control system, the real-time visibility requirement information including the dimming of each partition of the display screen and the overall color tone requirement for ensuring the visibility of key information in the display screen for the current driver is analyzed. Taking this as the adjustment basis and combined with the display screen parameter set, the local display effect of the display screen is adjusted, and the adjusted display information that enables the driver to quickly extract key information during vehicle driving is output, realizing dynamic local adaptive adjustment of the display effect of the in-vehicle display screen in the complex environmental changes brought about by vehicle driving, improving the information transmission effect of the in-vehicle display screen, and ensuring the user experience. The specific implementation method can refer to the following embodiments.

[0034] Figure 2 This is a flowchart of a local display method based on Mini LED provided by an embodiment of the present application. The method of this embodiment can be applied to the server in the above scenario. As Figure 2As shown, the method includes: S201. Obtain an environmental impact parameter set and a display screen parameter set, analyze the environmental impact parameter set and the display screen parameter set, and determine a real-time impact characteristic information set.

[0035] The environmental impact parameter set can be a set of key parameters in the vehicle's internal and external environments that affect the display effect of the in-vehicle display screen. The environmental impact parameter set can be obtained by the vehicle-mounted system controlling the vehicle's built-in sensor modules (such as a light sensor module, a GPS positioning module, a time module, etc.).

[0036] The display screen parameter set can be a set of parameters describing the hardware characteristics of the display screen. The display screen parameter set can be obtained through the display factory parameter recording unit.

[0037] The real-time impact characteristic information set can be a comprehensive impact characteristic representing the current environment's impact on the driver's visual perception and the screen display effect.

[0038] Specifically, traditional in-vehicle display screens usually adopt a global brightness adjustment strategy, which cannot adapt to the complex dynamic environment during vehicle driving. As a result, strong environmental light is refracted or reflected through the windshield onto the display screen surface and within the driver's line of sight, forming light spots and reducing the readability of key information (such as navigation routes and vehicle speeds). At the same time, due to differences in the hardware parameters and layout characteristics of in-vehicle display screens in different vehicles, through the dual analysis of the environmental impact parameter set and the display screen parameter set, under the relative positions of the driving layout and the display layout, analyze the negative impacts on the driver's vision and the display screen display effect caused by the dynamic light changes brought about by driving, and construct a real-time impact characteristic information set, providing a scientific data basis for analyzing the corresponding adjustment strategies of the display screen in the case of the driver's visual obstruction and the display screen display effect obstruction.

[0039] S202. Obtain display content data, analyze the display content data based on the real-time impact characteristic information set, and determine real-time visibility requirement information.

[0040] The display content data can be the information content presented on the current screen, such as navigation routes, vehicle speeds, warning icons, multimedia interfaces, etc. The display content data is obtained through the display screen rendering control system.

[0041] The real-time visibility requirement information can be the dimming and overall color tone adjustment requirements for different display areas generated according to the importance of the display content and the degree of environmental interference.

[0042] Specifically, the global dimming strategy of existing in-vehicle displays cannot perform precise brightness compensation for the core area of the displayed content (such as warning icons), resulting in excessive backlight power consumption in non-essential areas, while the displayed content in essential areas cannot be highlighted. The non-critical areas (such as background maps) and key information (such as collision warning icons) use the same brightness, which is easily overlooked by drivers in emergency situations. Moreover, under the interference of ambient light, the displayed content in the key area will have color deviation (for example, the red warning icon appears orange due to the influence of reflected light), making it difficult for drivers to quickly receive key information through the display screen. Therefore, by analyzing the displayed content, accurately distinguishing the key information and non-key information in the current displayed content, and combining the impact characteristics of the current environment on the driver's information reception reflected in the real-time impact feature information set, an analysis of the zoning adjustment requirements for the in-vehicle display with MiniLED technology as the backlight strategy is carried out to obtain the real-time visibility requirement information including the dimming and overall color tone requirements of each zone of the display screen to ensure the visibility of the key information in the display screen for the current driver, providing a reliable adjustment basis for the local display adjustment of the in-vehicle display.

[0043] S203. Based on the display screen parameter set, according to the real-time visibility requirement information, adjust the local display effect of the display screen and output the adjusted display information.

[0044] The local display effect adjustment can be an operation of differentially adjusting the brightness of different backlight zones in the in-vehicle display screen, adjusting the overall color tone of the display screen, and simultaneously smoothing the display effect of the transition zone.

[0045] The adjusted display information can be the final display screen information after local dimming and overall color tone optimization.

[0046] Specifically, according to the dimming requirements and overall color tone requirements of each backlight zone reflected in the real-time visibility requirement information, through the multi-channel LED driver chip built in the Mini LED display screen, adjust the brightness of the LED lamp beads in each backlight zone to achieve dynamic dimming of each backlight zone, and through the color management system built in the display screen, adjust the overall color temperature performance of the display screen according to the color tone requirements, and then output the displayed content after dimming and color tone adjustment, so that the driver can quickly receive key information through the display screen during driving.

[0047] Through this solution, the environmental impact parameter set and the display screen parameter set are comprehensively analyzed to analyze the comprehensive impact characteristics of light on the visual perception of the driver and the display effect of the screen in the current vehicle driving environment, and a real-time impact characteristic information set is obtained. On this basis, combined with the display content data, the real-time visibility requirement information including the dimming of each partition of the display screen and the overall color tone requirement for ensuring the visibility of the key information in the display screen for the current driver is analyzed. Taking this as the adjustment basis and combining the display screen parameter set, the local display effect of the display screen is adjusted, and the adjusted display information that enables the driver to quickly extract key information during vehicle driving is output, realizing the dynamic local adaptive adjustment of the display effect of the in-vehicle display screen in the complex environmental changes brought about by vehicle driving, improving the information transmission effect of the in-vehicle display screen, and ensuring the user experience.

[0048] In some embodiments, the environmental impact parameter set includes real-time ambient light intensity change information, vehicle real-time position, current timestamp, windshield static parameter information, and in-vehicle layout information; the windshield static parameter information includes windshield light transmittance parameter, windshield curvature parameter, and windshield reflection characteristic parameter; the display screen parameter set includes display screen reference brightness, display screen partition information, display screen surface reflection characteristic, and display screen reference color temperature; the real-time impact characteristic information set includes human eye visual impact characteristic and screen display impact characteristic.

[0049] The real-time ambient light intensity change information can be dynamic ambient light intensity data collected in real time by an in-vehicle ambient light sensor.

[0050] The vehicle real-time position can be the current longitude and latitude coordinates of the vehicle obtained through an in-vehicle GPS module.

[0051] The current timestamp can be the accurate time information (including time zone) provided by the in-vehicle system clock.

[0052] The in-vehicle layout information can be information including the layout of the in-vehicle driving area and the layout of the display area.

[0053] The windshield light transmittance parameter can be the transmittance of visible light by the windshield material (such as 75%).

[0054] The windshield curvature parameter can be the three-dimensional curvature radius and surface equation of the windshield, which are parameters from the vehicle design stage.

[0055] The windshield reflection characteristic parameter can be the reflectivity curve (specular reflection and diffuse reflection ratio) of the windshield surface coating layer, obtained from the windshield factory test data.

[0056] The display screen reference brightness can be the maximum brightness value of the display screen in a standard darkroom environment (such as 1000 nit).

[0057] The display screen zoning information can be the backlight light control zoning division scheme of the display screen.

[0058] The surface reflection characteristics of the display screen can be the light reflectivity and scattering characteristics of the display screen surface.

[0059] The reference color temperature of the display screen can be the standard white point color temperature value (such as 6500K) calibrated at the factory of the display screen.

[0060] The human eye visual influence characteristics can be the characteristic parameters that quantify the interference degree of ambient light on the visual perception ability of the driver.

[0061] The screen display influence characteristics can be the characteristic parameters that describe the interference distribution state of ambient light on the visibility of the display screen.

[0062] Specifically, during the driving process of the vehicle, the ambient light intensity may fluctuate violently due to factors such as weather, entering and exiting tunnels, and building blockages. If there is a lack of real-time monitoring of the light intensity, the brightness adjustment of the display screen will lag behind the environmental changes, resulting in the driver being unable to see key information (such as navigation instructions) clearly under strong light, or glare being generated due to the over-bright screen under low light. The real-time ambient light intensity change information dynamically reflects the real-time ambient light intensity; the sun position is the core factor affecting the incident direction of external light into the vehicle. For example, when the low-angle sunlight shines directly on the windshield during the morning and evening rush hours, if the light projection angle is not calculated by combining the vehicle position and the current time, the distribution of the windshield reflection spot in the vehicle cannot be accurately predicted, which will further lead to the failure of the local brightness adjustment of the display screen. By using the real-time position of the vehicle and the current timestamp, and using astronomical algorithms, such as the solar azimuth angle calculation model, the angle of external light entering the vehicle can be quantified in real time; the impact of external light entering the vehicle on the driver's line of sight and the display effect of the display screen is also directly affected by the windshield. Among them, the windshield transmittance parameter affects the intensity of ambient light entering the vehicle, the windshield curvature parameter reflecting the curved surface design of the windshield changes the light refraction path, and the windshield reflection characteristic parameter reflecting the ratio of specular reflection and diffuse reflection of the windshield determines the distribution characteristics of the windshield reflected light in the vehicle; the hardware parameter characteristics of the in-vehicle display screen based on Mini LED backlight technology have a direct impact on the impact it receives and the corresponding adjustments required. The more the number of partitions reflected in the display screen zoning information, the smaller the granularity of the local adjustment made by the corresponding display screen. The surface reflection characteristics of the display screen reflect the difference in the reflection characteristics of ambient light by the display screen surface treatment characteristics. The reference brightness and reference color temperature of the display screen are used as the reference values for subsequent local adjustments.

[0063] Through this solution, an environmental impact parameter set including real-time ambient light intensity change information, vehicle real-time position, current timestamp, windshield static parameter information, and in-vehicle layout information is used to comprehensively reflect the performance of ambient light in the vehicle. A display screen parameter set including the display screen reference brightness, display screen partition information, display screen surface reflection characteristics, and display screen reference color temperature is used to improve the adaptability of subsequent light impact analysis and corresponding adjustment decision analysis to the display screen characteristics.

[0064] In some embodiments, based on the current timestamp and the vehicle real-time position, the real-time external light projection angle is determined; according to the ambient light intensity change information, combined with the windshield light transmittance parameter, a light attenuation model is established to determine the actual light incident intensity after the external light passes through the windshield; based on the windshield curvature parameter and the windshield reflection characteristic parameter, according to the real-time external light projection angle, a light refraction path characteristic map is constructed to analyze the light scattering distribution characteristic of the light in the vehicle after passing through the windshield at the current real-time external light projection angle; according to the in-vehicle layout information, the driving layout area and the display screen layout area are extracted; according to the actual light incident intensity and the light scattering distribution characteristic, the degree of inhibition of the current light on the human eye visual reception ability in the driving layout area is analyzed to determine the human eye visual impact characteristic; based on the display screen parameter set, according to the actual light incident intensity and the light scattering distribution characteristic, the interference intensity and interference range of the current light on the display effect of the display screen in the display screen layout area are analyzed to determine the screen display impact characteristic.

[0065] The real-time external light projection angle can be the incident angle of the sun light relative to the windshield calculated through the vehicle real-time position and the timestamp.

[0066] The light attenuation model is a mathematical model that describes the intensity attenuation law of the external ambient light passing through the windshield.

[0067] The actual light incident intensity can be the intensity of the external light irradiating into the vehicle after passing through the windshield.

[0068] The light refraction path characteristic map can be a two-dimensional map generated by the ray tracing algorithm, which characterizes the refraction, reflection, and scattering path distribution of the light on the windshield surface.

[0069] The driving layout area can be the key area within the line of sight of the driver in the vehicle.

[0070] The display screen layout area can be the relative layout area of the in-vehicle display screen in the vehicle space.

[0071] The light scattering distribution characteristic is the light distribution characteristic formed by the scattering of the ambient light in the vehicle after entering the vehicle.

[0072] Specifically, the GPS module is called to obtain the vehicle's longitude and latitude. Combining with the current timestamp in the system, the real-time external light projection angle is determined through the solar azimuth angle and altitude angle calculation formula. According to the windshield transmittance parameter, the ambient light intensity is attenuated to obtain the actual light incident intensity (actual incident intensity = ambient light × windshield transmittance parameter). Based on the windshield curvature parameter and the corresponding reflection characteristic parameter, the ray tracing algorithm is used to simulate the refraction and reflection paths of light, generating a light scattering distribution characteristic map to clarify the distribution of light in each area of the vehicle after scattering and obtain the light scattering distribution characteristics. The driving layout area (usually the 120° viewing angle range directly in front of the steering wheel) and the display screen layout area (the coordinate ranges of the in-vehicle infotainment center display screen and the instrument panel display screen) are extracted from the vehicle interior layout information. Based on the current actual light incident intensity, according to the relative spatial relationship between the light scattering distribution characteristics and the driving layout area, the degree of inhibition of the current light on the human eye's visual reception ability in the driving layout area is analyzed to determine the human eye visual impact characteristics. Based on the actual light incident intensity, according to the display screen hardware characteristics reflected in the display screen parameter set, the negative impacts on different backlight zones in the display screen under the current light scattering distribution characteristics are analyzed, and the corresponding interference intensity and interference range are delimited to form the screen display impact characteristics.

[0073] Through this solution, based on the current timestamp and the real-time position of the vehicle, the real-time external light projection angle during the vehicle's driving process is deduced. Based on the ambient light intensity change information and combined with the windshield transmittance parameter, the attenuation of light when passing through the windshield is analyzed to determine the actual light incident intensity. Further, combined with the windshield curvature parameter and the windshield reflection characteristic parameter, the light scattering distribution characteristics of light in the vehicle are analyzed and determined. Based on the actual light incident intensity and the light scattering distribution characteristics, the human eye visual impact characteristics are determined, and combined with the display screen parameter set, the screen display impact characteristics are determined to characterize the dual impacts of light entering the vehicle on the human eye's visual reception ability and the display effect of the display screen, improving the comprehensiveness and accuracy of subsequent local display adjustment.

[0074] In some embodiments, according to the overlapping area between the driving layout area and the light scattering distribution characteristics, it is judged whether the overlapping area coincides with the preset driver's line of sight range. If there is a coincidence, according to the actual light incident intensity, the preset pupil adjustment characteristic database is retrieved to determine the corresponding pupil adjustment lag time under the current light intensity. According to the actual light incident intensity and the pupil adjustment lag time, the dynamic visual inhibition coefficient representing the degree of inhibition of the human eye's visual reception ability by the current light is determined, and the dynamic visual inhibition coefficient is used as the human eye visual impact characteristic.

[0075] The overlapping area may refer to the overlapping part between the driver's line of sight range and the interference light distribution area formed in the vehicle after the external light is refracted / reflected by the windshield.

[0076] The preset driver's line of sight range can be the three-dimensional space range where the driver's eyes focus during normal driving (usually a conical area of 120° horizontally and 40° vertically).

[0077] The preset pupil adjustment feature database can be a database that records the mapping relationship between the change in the pupil diameter of the human eye and the adjustment lag time under different light intensities. The preset pupil adjustment feature database is obtained through statistical analysis of authoritative experimental data.

[0078] The pupil adjustment lag time can be the physiological adaptation time required for the pupil to contract / dilate when the human eye switches from a bright environment to a dark environment (or vice versa).

[0079] The dynamic vision inhibition coefficient can be an index that quantifies the degree of inhibition of light on the visual reception ability of the human eye.

[0080] Specifically, not all scattered light will affect driving safety. For example, the light spot on the co-driver side may only affect the passengers, while the light spots within the driver's line of sight need to be processed first. By extracting the scattered light distribution coordinates from the light refraction path feature map and geometrically superimposing them with the preset driver's line of sight range, it is determined whether there is an overlap between the overlapping area and the preset driver's line of sight range. If there is an overlap, subsequent analysis is performed on the overlapping area to filter out non-critical interferences and reduce the amount of ineffective calculations. When there is an overlapping area, it indicates that the current in-vehicle scattered light has a negative impact on the driver's vision. Based on the current actual light incident intensity, the preset pupil adjustment feature database is retrieved to determine the corresponding pupil adjustment lag time under the current light intensity. The longer the pupil adjustment lag time, the greater the negative impact on the driver's visual reception ability. According to the actual light incident intensity and the pupil adjustment lag time, the dynamic vision inhibition coefficient that quantitatively represents the degree of inhibition of the human eye's visual reception ability by the current light is calculated (dynamic vision inhibition coefficient = 1 / (1 + actual incident intensity × pupil adjustment lag time × dimension conversion coefficient)), and the corresponding dynamic vision inhibition coefficient is used as the human eye vision impact feature.

[0081] Through this solution, by accurately identifying the overlapping area, filtering out non-critical interferences, reducing the amount of ineffective calculations, based on the overlapping feature between the driving layout area and the light scattering distribution characteristics, the corresponding pupil adjustment lag time under the current light intensity is determined, and then the dynamic vision inhibition coefficient that quantitatively represents the degree of inhibition of the human eye's visual reception ability by the current light is obtained, and the dynamic vision inhibition coefficient is used as the human eye vision impact feature to accurately quantify the impact of the current light on the driver's visual reception ability.

[0082] In some embodiments, based on the reflection characteristics of the display screen surface, according to the spatial relationship between the display screen layout area and the light scattering distribution characteristics, the reflection situation of the current light on the display screen surface is analyzed to generate a reflection spot distribution map of the screen surface; according to the reference brightness of the display screen and the reflection spot distribution map, the influence of the current light on the visibility decline of different display screen areas is analyzed to generate a heat map of the visibility decline distribution on the screen surface, and the heat map of the visibility decline distribution on the screen surface is used as the screen display influence characteristic.

[0083] The spatial relationship can be the relative spatial position relationship between the display screen layout area and the light scattering distribution characteristics.

[0084] The reflection spot distribution map of the screen surface can be a two-dimensional heat map characterizing the local high-brightness areas formed by the reflection of external light on the display screen surface.

[0085] The heat map of the visibility decline distribution on the screen surface can be two-dimensional map information quantifying the degree of visibility decline of each area of the display screen due to environmental light interference.

[0086] Specifically, different display screen surface treatment processes (such as matte, mirror, etc.) have significant differences in the light reflection characteristics, and affected by the screen reflection characteristics, there are also differences in the degree of negative impact on the displayed content shown by the reflected light. The reflection characteristic parameters of the display screen surface (specular reflectivity, diffuse reflection coefficient) are called, combined with the actual incident light intensity and incident angle data in the light scattering distribution characteristics, and through the light reflection simulation algorithm, the intensity of the reflected light formed by the light scattering distribution characteristics on the display screen surface is quantified to construct a reflection spot distribution map. The reflection spot distribution map is compared with the reference brightness of the display screen, and for each backlight partition, the ratio of the reflected light intensity to the corresponding reference brightness is calculated to generate an initial decline index. According to the non-linear characteristics of human eye brightness perception (such as Weber-Fechner's law), the index is logarithmically transformed to output a heat map of the visibility decline distribution, and the heat map of the visibility decline distribution on the screen surface is used as the screen display influence characteristic.

[0087] Through this solution, the performance of the reflected light in each backlight partition on the display screen surface is analyzed to obtain a reflection spot distribution map. On this basis, combined with the reference brightness of the screen, the influence of the current light on the visibility decline of different display screen areas is analyzed to generate a heat map of the visibility decline distribution on the screen surface, and the heat map of the visibility decline distribution on the screen surface is used as the screen display influence characteristic, realizing the scientific quantification of the negative impact caused by light on the in-vehicle screen surface and improving the accuracy of subsequent local screen adjustment.

[0088] In some embodiments, according to a preset core element list, the display content data is analyzed to screen the core visual elements in the current display content, and a set of core element display areas is determined; based on the preset driver's line-of-sight range and the display screen layout area, the set of core element display areas is analyzed to determine the relative line-of-sight angle corresponding to each core element display area; based on the backlight adjustment strategy, according to the relative line-of-sight angle, the dynamic visual suppression coefficient and the heat map of the visible light decay distribution on the screen surface are analyzed to determine the backlight adjustment information corresponding to each core element display area; based on the hue reconstruction strategy, according to the relative line-of-sight angle, the dynamic visual suppression coefficient and the heat map of the visible light decay distribution on the screen surface are analyzed to determine the hue reconstruction information.

[0089] The preset core element list can be a set of pre-set rules for identifying key visual elements in the display content, and the preset core element list can be set by empirical rules.

[0090] The core visual elements can be key display contents in the display screen that are highly related to driving behavior (such as navigation paths, vehicle speeds, warning icons, etc.).

[0091] The set of core element display areas can be a set of physical coordinate ranges on the screen of the key information screened from the display content according to the preset core element list.

[0092] The relative line-of-sight angle can be the three-dimensional space angle difference between the driver's line-of-sight direction and the core element display area of the display screen, which is used to quantify the visual offset when the human eye gazes at the target area.

[0093] The backlight adjustment strategy can be a rule for dynamically adjusting the brightness of the backlight partition of the display screen according to the visible light decay degree and the line-of-sight angle of the core element.

[0094] The backlight adjustment information can be the backlight brightness adjustment parameter information required to meet the driver's visibility requirements for key display contents.

[0095] The hue reconstruction strategy can be a rule for dynamically adjusting the color temperature and contrast of the display screen according to the visible light decay heat map and the dynamic visual suppression coefficient.

[0096] The hue reconstruction information can be the hue adjustment parameter information required to meet the driver's visibility requirements for key display contents.

[0097] Specifically, during the process of the in-vehicle display transmitting information, the contradiction between environmental light interference and the visual needs of drivers is the core issue affecting the information transmission efficiency. Drivers do not continuously gaze at the display during driving. Usually, they quickly glance at the display to extract key information highly relevant to the current driving state (for example, in a speed limit section, drivers need to pay attention to the vehicle speed). Therefore, the anti-interference transmission of key information is the core issue that needs to be concerned during the information transmission process of the in-vehicle display. By parsing the data stream of the display content (such as UI rendering instructions), matching the feature tags in the preset core element list (such as "speed number", "warning icon"), identifying and extracting the core visual elements in the current display content, constructing a set of core element display areas, dynamically screening the key information areas, reducing the interference of non-core elements. At the same time, since the change in the line of sight angle will affect visual perception, by parsing the relative spatial coordinate positions between the preset driver's line of sight range and the areas where each core visual element is located in the display layout area, determining the relative line of sight angle corresponding to each core element display area, based on the backlight adjustment strategy, introducing the relative line of sight angle, and according to the dynamic visual suppression coefficient and the heat map of the visibility decay distribution on the screen surface, analyzing how to adjust the backlight corresponding to the core element display area at the current line of sight angle to balance the visual suppression caused by environmental light and the visibility decay of the screen display content, and then obtaining the backlight adjustment information. At the same time, based on the color tone reconstruction strategy, introducing the relative line of sight angle, and according to the dynamic visual suppression coefficient and the heat map of the visibility decay distribution on the screen surface, analyzing how to adjust the overall color tone of the display content at the current line of sight angle to balance the visual suppression caused by environmental light and the visibility decay of the screen display content, and then obtaining the color tone reconstruction information.

[0098] Through this solution, according to the preset core element list, screening the core visual elements in the display content, constructing a set of core element display areas, reducing the interference of non-core elements, improving the pertinence of subsequent display adjustments for key information, and thus improving the information transmission efficiency. By introducing the relative line of sight angle, the impact of the change in the line of sight angle on visual perception is introduced into the display adjustment analysis process, improving the comprehensiveness of subsequent display adjustment strategies. On this basis, based on the backlight adjustment strategy and the color tone reconstruction strategy, analyzing the dynamic visual suppression coefficient and the heat map of the visibility decay distribution on the screen surface, respectively determining the backlight adjustment information and the color tone reconstruction information, and realizing improving the visibility of the display content from two dimensions of brightness and color.

[0099] In some embodiments, according to the core element display area set, the display screen partition information is analyzed to determine several backlight partitions interfered by each core element display area and the corresponding basic backlight value; according to the basic backlight value and the corresponding dynamic vision suppression coefficient, the basic backlight adjustment value is determined; based on the basic backlight adjustment value, according to the visibility decay index corresponding to each backlight partition in the visibility decay distribution heat map on the screen surface, the basic backlight adjustment value is corrected for backlight to determine the partition backlight compensation value; based on the partition backlight compensation value, according to the relative line-of-sight angle, the bilinear interpolation algorithm is used to perform brightness smoothing processing on several backlight partitions corresponding to the boundary of different core element display areas to determine the edge backlight adjustment value; according to the partition backlight compensation value and the edge backlight adjustment value, the backlight adjustment information is constructed.

[0100] The basic backlight value can be the default brightness value of each backlight partition of the display screen without environmental interference, usually preset by the manufacturer.

[0101] The basic backlight adjustment value can be the backlight value that the corresponding backlight partition needs to be adjusted to under the influence of the dynamic vision suppression coefficient.

[0102] The visibility decay index can be a quantitative index characterizing the degree of visibility attenuation of a specific area of the display screen due to light interference.

[0103] The partition backlight compensation value can be the target brightness value that needs to further compensate the backlight within each partition after considering the influence of the line-of-sight angle on the basis of the basic backlight adjustment value.

[0104] The bilinear interpolation algorithm can be a smoothing transition algorithm based on the brightness values of adjacent pixels, used to eliminate the brightness mutation between backlight partitions. The bilinear interpolation algorithm can use the interpolation function in OpenCV (Open Source Computer Vision Library).

[0105] Brightness smoothing processing can be a process of performing smoothing transition processing on the brightness at the junction of each backlight partition in the core element display area.

[0106] The edge backlight adjustment value can be the transitional brightness correction value obtained by interpolation calculation at the junction of the core element display areas.

[0107] Specifically, analyze the coordinate ranges of each core element display area in the core element display area set within the corresponding display screen. Based on this, retrieve the display screen partition information, and screen all the backlight partitions that overlap with each core element area. According to the basic backlight value and the corresponding dynamic visual suppression coefficient, quantify the basic backlight adjustment value (basic backlight adjustment value = basic backlight value × (1 + dynamic visual suppression coefficient)). Extract the visibility decay index of the corresponding backlight partition from the visibility decay distribution heat map, and perform a secondary correction on the basic adjustment value based on the decay index to obtain the partition backlight compensation value (partition backlight compensation value = basic backlight adjustment value × (1 + visibility decay index)). Further, since the above process analyzes and determines the target backlight brightness that each backlight partition corresponding to each core element area needs to achieve respectively, this process will bring about a backlight brightness difference between the backlight partitions corresponding to each core element area. For a display screen using Mini LED as the backlight technology, during the process of dynamically and differentially adjusting the backlight for each backlight partition, the junction of each backlight partition is affected by the backlight difference and is prone to "halo", which in turn affects the transmission effect of the display information. Through the bilinear interpolation algorithm in computer vision processing technology, according to the partition backlight compensation values of several backlight partitions corresponding to the boundary of different core element display areas, generate the corresponding transition brightness gradient, realize the brightness smoothing processing of the area junction, and determine the corresponding edge backlight adjustment value to reduce the influence range of the "halo" phenomenon and further improve the display effect.

[0108] Through this solution, according to the basic backlight value of the backlight partition that interferes with the core element display area, by introducing the dynamic visual suppression coefficient, analyze the basic backlight adjustment value that the backlight partition needs to be adjusted to when the driver's vision is affected by light, and improve the matching degree between the partition backlight brightness value and the degree of the driver's vision being affected. On this basis, further introduce the visibility decay index corresponding to each backlight partition, analyze the partition backlight compensation value that needs to be further corrected when the current backlight partition is affected by light, and improve the matching degree between the partition backlight brightness value and the degree of the partition being affected. At the same time, through the bilinear interpolation algorithm, perform brightness smoothing processing on several backlight partitions corresponding to the boundary of different core element display areas, and reduce the "halo" effect generated during the partition backlight adjustment process.

[0109] In some embodiments, according to the non-linear mapping relationship between the visibility decay index and the screen contrast requirement, determine the contrast enhancement ratio of the backlight partition interfered by each core element display area; based on the reference color temperature of the display screen, according to the positive correlation relationship between the dynamic visual suppression coefficient and the required display color temperature, determine the color temperature adjustment ratio; according to the contrast enhancement ratio and the color temperature adjustment ratio, construct the hue reconstruction information.

[0110] The screen contrast requirement can be the lowest luminance contrast threshold required to maintain the readability of the displayed content.

[0111] The non-linear mapping relationship can be a non-proportional function relationship between the visibility decay index and the contrast enhancement ratio, which is used to dynamically match the degree of visibility decay and the intensity of contrast compensation, and is generated by fitting the optical experimental data in the historical driving scenario (for example, when the decay index is 0.6, the luminance contrast is enhanced by 30%).

[0112] The positive correlation relationship can be a proportional function relationship between the dynamic visual inhibition coefficient and the display color temperature required for the current displayed content, which is used to dynamically match the degree of visual inhibition and the degree of color temperature adjustment, and is generated by fitting the optical experimental data in the historical driving scenario.

[0113] The contrast enhancement ratio can be the percentage increase in luminance for a specific backlight zone, which is used to compensate for visibility decay.

[0114] The color temperature adjustment ratio can be the adjustment range of the target color temperature relative to the reference color temperature.

[0115] Specifically, while analyzing the adjustment of the backlight in several backlight zones interfering with the core element display area, in order to further highlight the display content elements corresponding to the core element display area, it is necessary to enhance the luminance contrast between the core element display area and other areas. Based on the visibility decay index, retrieve the preset non-linear mapping table (such as an exponential function curve), query the contrast enhancement ratio corresponding to the decay index, and this contrast enhancement ratio is the luminance ratio required to highlight the core element display area; the larger the dynamic visual inhibition coefficient, the greater the intensity of the light impact on the eyes of the current driver. In a low-light environment, the human eye is more sensitive to warm colors with a lower color temperature, while in a high-light environment, the human eye prefers cold colors with a high color temperature. Therefore, after the human eye is affected by high light, the ability to receive cold-colored display content is stronger. Based on the current dynamic visual inhibition coefficient, according to the proportional function relationship between the dynamic visual inhibition coefficient and the display color temperature required for the current displayed content, match the current required color temperature adjustment ratio.

[0116] Through this solution, starting from the two dimensions of luminance contrast and color temperature, according to the non-linear mapping relationship between the visibility decay index and the screen contrast requirement, determine the contrast enhancement ratio required for the backlight zone, and according to the positive correlation relationship between the dynamic visual inhibition coefficient and the required display color temperature, determine the color temperature adjustment ratio required for the display content, further improve the display effect of the local core display content, and then optimize the efficiency and effect of the driver receiving key information from the display screen.

[0117] In some embodiments, the backlight brightness values of corresponding backlight zones are adjusted respectively according to the zonal backlight compensation value and the edge backlight adjustment value; according to the contrast enhancement ratio, the backlight brightness of the backlight zones that do not interfere with any core element display area is adjusted for attenuation; based on the reference color temperature of the display screen, the color temperature of the display screen is adjusted in real time according to the color temperature adjustment ratio.

[0118] The adjustment of the backlight brightness attenuation may be a process of reducing the backlight brightness in the backlight zone.

[0119] Specifically, through the multi-channel LED driving chip built in the Mini LED display screen, according to the backlight compensation value and the edge backlight adjustment value corresponding to different backlight zones, the brightness of the LED lamp beads in the corresponding backlight zones is adjusted to achieve the zonal adaptive adjustment of the backlight. Since the backlight brightness optimization for the visibility of the displayed content in the core element display area has been made in the foregoing embodiments, if the backlight brightness of the core element display area is continuously enhanced according to the contrast enhancement ratio, the situation of "backlight overexposure" is likely to occur, resulting in the decline of the visibility of the displayed content. Therefore, according to the contrast enhancement ratio, it is necessary to perform a decline process on the backlight in the display area outside the core element display area to reversely enhance the contrast of the core element display area and achieve the highlighting of the core displayed content. Through the multi-channel LED driving chip, according to the contrast enhancement ratio, the backlight brightness attenuation adjustment of the corresponding ratio is performed on the backlight zones that do not interfere with any core element display area to highlight the displayed content in the core element display area. At the same time, through the color management system built in the display screen, on the basis of the reference color temperature of the display screen, the color temperature of the display screen is increased in real time according to the color temperature adjustment ratio to make the color temperature match the intensity of the light received by the human eye.

[0120] Through this solution, the backlight brightness values of the corresponding backlight zones are adjusted respectively according to the zonal backlight compensation value and the edge backlight adjustment value to achieve the zonal adaptive adjustment of the backlight. By performing a decline process corresponding to the contrast enhancement ratio on the backlight in the display area outside the core element display area, the situation of "backlight overexposure" is avoided, and the visibility of the displayed content is improved. On the basis of the reference color temperature of the display screen, the color temperature of the display screen is increased in real time according to the color temperature adjustment ratio to make the color temperature match the intensity of the light received by the human eye, thereby improving the receiving speed of the driver for the displayed content.

[0121] In some embodiments, the historical working parameter sets of each backlight zone are monitored in real time; the historical working parameter sets include the cumulative working time of the zone, the average brightness value, and the peak brightness frequency; based on a preset aging influence weight coefficient, the historical working parameter sets are weighted and evaluated to generate a real-time aging degree evaluation value for each backlight zone; according to the real-time aging degree evaluation value, a set of high-aging-risk zones with a real-time aging degree evaluation value higher than a preset threshold is identified, and an adjacent candidate compensation zone set is extracted; on the premise of meeting the real-time visibility requirement information corresponding to the current display content, the backlight brightness corresponding to the set of high-aging-risk zones is dynamically load-shifted, and the brightness increment exceeding the basic backlight compensation value is distributed to the candidate compensation zone set according to the principle of spatial proximity, and the brightness compensation of the corresponding backlight zones is performed through a time-sequential alternating mechanism.

[0122] The historical working parameter sets can be a set of historical operation data of the backlight zones, which is used to quantify the aging degree of the zones.

[0123] The cumulative working time of the zone can be the total working duration of a single backlight zone since it was enabled, which reflects its basic usage intensity.

[0124] The average brightness value can be the average brightness output level of the backlight zone within a historical period, which is used to evaluate the regular workload.

[0125] The peak brightness frequency can be the number of times the backlight zone reaches the maximum allowable brightness within a historical period, which reflects the extreme load frequency.

[0126] The preset aging influence weight coefficient can be a preset proportional factor used for weighted evaluation of the influence of different working parameters on the aging of the zones. The preset aging influence weight coefficient can be obtained by fitting the aging experimental data of the backlight zones of the display screen.

[0127] The real-time aging degree evaluation value can be a current aging quantification index calculated by integrating the historical working parameters and the weight coefficient. The higher the value, the greater the aging risk.

[0128] The set of high-aging-risk zones can be a set of backlight zones whose real-time aging evaluation value exceeds a preset threshold, and load migration needs to be prioritized.

[0129] The candidate compensation zone set can be a set of backlight zones that are physically adjacent to the high-aging-risk zones and whose aging evaluation value is lower than the threshold, which is used to receive the migrated brightness increment.

[0130] Dynamic load migration can be a process of distributing the excess brightness load of the high-aging-risk zones to the candidate zones according to rules to balance the aging degree of the zones.

[0131] The principle of spatial proximity can be to preferentially select candidate zones adjacent to the high-aging zones for load distribution to ensure the spatial continuity of the display effect.

[0132] The timing alternation mechanism can be to periodically rotate the compensation tasks of the candidate partitions to avoid a single partition becoming a new aging risk point due to long-term compensation.

[0133] Specifically, in the in-vehicle Mini LED display system, uneven aging of partitions will lead to a decline in display quality. Since partition aging is a decline at the hardware level, which is irreversible and difficult to avoid, in order to ensure the unity of the overall display effect of the display screen, by real-time monitoring the cumulative working time, average brightness value, and peak brightness frequency of each backlight partition, updating the historical working parameter set, and according to the preset aging influence weight coefficients corresponding to each parameter, calculating the real-time aging degree evaluation value of each partition by weighted calculation, comparing the real-time aging evaluation value with the preset threshold, screening out the set of high-aging risk partitions, extracting the adjacent partitions of each high-aging risk partition according to the display screen partition information, obtaining the candidate compensation partition set, analyzing the current required backlight brightness of the high-aging risk partitions, separating the incremental part that exceeds the basic backlight adjustment value, and allocating the excess increment to the adjacent candidate partitions according to the principle of spatial proximity, starting the timing alternation mechanism, and rotating the candidate partitions in the next cycle to improve the balance of the aging speed and aging degree between different backlight partitions and improve the consistency of the display effect of the display screen.

[0134] Through this solution, based on the historical working parameter set, the aging degree of each backlight partition is evaluated in real time. Based on this, through the principle of spatial proximity and the timing alternation mechanism, the backlight brightness of the high-aging risk partitions is dynamically migrated to improve the balance of the aging speed and aging degree between different backlight partitions and improve the consistency of the display effect of the display screen.

Claims

1. A local display method based on Mini LED, characterized in that, Including: Obtain an environmental impact parameter set and a display screen parameter set, analyze the environmental impact parameter set and the display screen parameter set, and determine a real-time impact feature information set; Obtain display content data, analyze the display content data based on the real-time impact feature information set, and determine real-time visibility requirement information; Based on the display screen parameter set, according to the real-time visibility requirement information, adjust the local display effect of the display screen, and output the adjusted display information.

2. The method according to claim 1, wherein The environmental impact parameter set includes real-time ambient light intensity change information, real-time vehicle position, current timestamp, windshield static parameter information, and in-vehicle layout information; The windshield static parameter information includes windshield light transmittance parameter, windshield curvature parameter, and windshield reflection characteristic parameter; The display screen parameter set includes display screen reference brightness, display screen partition information, display screen surface reflection characteristic, and display screen reference color temperature; The real-time impact feature information set includes human eye visual impact characteristics and screen display impact characteristics.

3. The method according to claim 2, wherein The analyzing the environmental impact parameter set and the display screen parameter set to determine the real-time impact feature information set includes: Based on the current timestamp and the real-time vehicle position, determine the real-time external light projection angle; According to the ambient light intensity change information, combined with the windshield light transmittance parameter, establish a light attenuation model, and determine the actual light incident intensity after the external light passes through the windshield; Based on the windshield curvature parameter and the windshield reflection characteristic parameter, according to the real-time external light projection angle, construct a light refraction path feature map, and analyze the light scattering distribution characteristic of the light in the vehicle after passing through the windshield at the current real-time external light projection angle; According to the in-vehicle layout information, extract the driving layout area and the display screen layout area; According to the actual light incident intensity and the light scattering distribution characteristic, analyze the suppression degree of the current light on the human eye visual reception ability in the driving layout area, and determine the human eye visual impact characteristic; Based on the display screen parameter set, according to the actual light incident intensity and the light scattering distribution characteristic, analyze the interference intensity and interference range of the current light on the display effect of the display screen in the display screen layout area, and determine the screen display impact characteristic.

4. The method according to claim 3, wherein The according to the light incident intensity and the light scattering distribution characteristic, analyzing the suppression degree of the current light on the human eye visual reception ability, and determining the human eye visual impact characteristic includes: According to the overlapping area between the driving layout area and the light scattering distribution characteristic, judge whether the overlapping area coincides with the preset driver's line of sight range; If there is a coincidence, according to the actual light incident intensity, retrieve the preset pupil adjustment characteristic database to determine the corresponding pupil adjustment lag time under the current light intensity; According to the actual light incident intensity and the pupil adjustment lag time, determine a dynamic visual suppression coefficient representing the suppression degree of the human eye visual reception ability by the current light, and use the dynamic visual suppression coefficient as the human eye visual impact characteristic.

5. The method according to claim 4, characterized in that The based on the display screen parameter set, according to the actual light incident intensity and the light scattering distribution characteristic, Analyze the interference intensity and interference range of the current light on the display effect of the display screen, and determine the screen display influence characteristics, including: Based on the surface reflection characteristics of the display screen, analyze the reflection situation of the current light on the surface of the display screen according to the spatial relationship between the layout area of the display screen and the light scattering distribution characteristics, and generate a distribution map of reflection spots on the screen surface; According to the reference brightness of the display screen and the distribution map of reflection spots, analyze the influence of the current light on the visibility decline of different display screen areas, generate a heat map of the visibility decline distribution on the screen surface, and use the heat map of the visibility decline distribution on the screen surface as the screen display influence characteristics.

6. The method according to claim 5, wherein Based on the real-time influence characteristic information set, analyze the display content data to determine the real-time visibility requirement information, including: According to the preset core element list, analyze the display content data, screen the core visual elements in the current display content, and determine the set of core element display areas; Based on the preset driver's line of sight range and the layout area of the display screen, analyze the set of core element display areas to determine the relative line of sight angle corresponding to each core element display area; Based on the backlight adjustment strategy, according to the relative line of sight angle, analyze the dynamic visual suppression coefficient and the heat map of the visibility decline distribution on the screen surface, and determine the backlight adjustment information corresponding to each core element display area; Based on the color tone reconstruction strategy, according to the relative line of sight angle, analyze the dynamic visual suppression coefficient and the heat map of the visibility decline distribution on the screen surface, and determine the color tone reconstruction information.

7. The method according to claim 6, wherein The backlight adjustment strategy includes: According to the set of core element display areas, analyze the display screen partition information, and determine several backlight partitions interfered by each core element display area and the corresponding basic backlight value; According to the basic backlight value and the corresponding dynamic visual suppression coefficient, determine the basic backlight adjustment value; Based on the basic backlight adjustment value, according to the visibility decline index corresponding to each backlight partition in the heat map of the visibility decline distribution on the screen surface, correct the basic backlight adjustment value for backlight to determine the partition backlight compensation value; Based on the partition backlight compensation value, according to the relative line of sight angle, use the bilinear interpolation algorithm to perform brightness smoothing processing on several backlight partitions corresponding to the boundaries of different core element display areas to determine the edge backlight adjustment value; According to the partition backlight compensation value and the edge backlight adjustment value, construct the backlight adjustment information.

8. The method according to claim 7, wherein The color tone reconstruction strategy includes: According to the non-linear mapping relationship between the visibility decline index and the screen contrast requirement, determine the contrast enhancement ratio of the backlight partitions interfered by each core element display area; Based on the reference color temperature of the display screen, according to the positive correlation relationship between the dynamic visual suppression coefficient and the required display color temperature, determine the color temperature adjustment ratio; According to the contrast enhancement ratio and the color temperature adjustment ratio, construct the color tone reconstruction information.

9. The method according to claim 8, wherein Based on the display screen parameter set, according to the real-time visibility requirement information, perform local display effect adjustment on the display screen and output the adjusted display information, including: Adjust the backlight brightness values of the corresponding backlight zones respectively according to the said zonal backlight compensation value and the said edge backlight adjustment value; According to the said contrast enhancement ratio, perform backlight brightness attenuation adjustment on the backlight zones that do not interfere with any of the said core element display areas; Based on the said display screen reference color temperature, adjust the display screen color temperature in real time according to the said color temperature adjustment ratio.

10. The method according to claim 9, wherein The said method further includes: Monitor the historical working parameter sets of each of the said backlight zones in real time; The said historical working parameter sets include the zonal cumulative working time, average brightness value and peak brightness frequency; Based on a preset aging influence weight coefficient, perform weighted evaluation on the said historical working parameter sets to generate the real-time aging degree evaluation value of each of the said backlight zones; According to the said real-time aging degree evaluation value, identify the set of high aging risk zones whose real-time aging degree evaluation value is higher than a preset threshold, and extract the adjacent candidate compensation zone set thereof; On the premise of meeting the real-time visibility requirement information corresponding to the current display content, perform dynamic load migration on the backlight brightness of the said set of high aging risk zones, distribute the brightness increment exceeding the basic backlight compensation value to the said candidate compensation zone set according to the spatial proximity principle, and perform brightness compensation on the corresponding said backlight zones through a timing alternation mechanism.

Images