Brightness adjustment method, device and vehicle

Abstract

This disclosure relates to a brightness adjustment method, device, and vehicle, applied in the field of vehicle intelligent control technology. The brightness adjustment method includes: acquiring the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle; determining a target brightness value and target contrast value for a first display screen, and a target color temperature value for a first ambient light, based on the illuminance and color temperature values, wherein the first ambient light is an ambient light located in the same area as the first display screen and is in an on state; adjusting the display effect of the first display screen based on the target brightness and target contrast values, and adjusting the first ambient light based on the target color temperature value. Thus, by combining the illuminance and color temperature values ​​to adjust the display screen and the ambient light, the impact of the contrast between the display screen / ambient light and the ambient light color temperature on the user's visual comfort, color perception, and visual fatigue when the ambient light color temperature changes, is avoided, providing the user with a stable and comfortable visual experience.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle intelligent control technology, and in particular to a brightness adjustment method, device and vehicle. Background Technology

[0002] Currently, the automatic brightness adjustment technology of vehicle interior lighting and display systems (such as instrument panels, central control screens, ambient lighting, etc.) mainly relies on the illuminance parameters collected by ambient light sensors as the sole basis for adjustment, that is, adjusting the brightness of the display interface and interior lighting according to the detected ambient light intensity.

[0003] However, relying solely on illuminance parameters as the basis for adjustment cannot distinguish between ambient light with the same illuminance but drastically different spectral compositions. For example, warm yellow light in the morning, cool white light at noon, and grayish-white light on a cloudy day have vastly different effects on human eye comfort, color perception, and visual fatigue. Therefore, existing adjustment methods are difficult to maintain a stable and comfortable visual experience under various complex lighting conditions. Summary of the Invention

[0004] To address the aforementioned technical problems, this disclosure provides a brightness adjustment method, apparatus, and vehicle. This solves the problem that adjusting the brightness of lighting and display systems solely based on illuminance makes it difficult to maintain a stable and comfortable visual experience under various complex lighting environments.

[0005] A first aspect of this disclosure provides a brightness adjustment method, including: Obtain the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle; The basic brightness coefficient, contrast coefficient, and color temperature adjustment parameters are determined based on the illuminance value and color temperature value; the target brightness value and target contrast value corresponding to the first display screen are determined based on the basic brightness coefficient and contrast coefficient respectively; the target color temperature value corresponding to the first ambient light is determined based on the color temperature adjustment parameters; the first ambient light is an ambient light that is in the same area as the first display screen and is in the on state. The display effect of the first display screen is adjusted based on the target brightness value and target contrast ratio, and the first ambient light is adjusted based on the target color temperature value.

[0006] In some embodiments of this disclosure, obtaining the illuminance value and color temperature value corresponding to the current ambient light of the vehicle includes: Based on the target sensor, the illuminance value corresponding to the current ambient light and the response signal value corresponding to each color channel are collected. The target sensor is the sensor corresponding to the first display screen. The response signal value is linearly transformed based on a preset transformation matrix to obtain the tristimulus value corresponding to the current ambient light. The preset transformation matrix is ​​a matrix used to map the response signal value of the color channel to the tristimulus value of the standard colorimetric system. The tristimulus value includes a red stimulus value used to characterize the intensity of the red component in the color, a green stimulus value used to characterize the intensity of the green component in the color, and a blue stimulus value used to characterize the intensity of the blue component in the color. Color temperature values ​​are determined based on tristimulus values.

[0007] In some embodiments of this disclosure, color temperature values ​​are determined based on tristimulus values, including: Calculate the chromaticity coordinates of the current ambient light based on the tristimulus values; Color temperature values ​​are determined based on chromaticity coordinates.

[0008] In some embodiments of this disclosure, before determining the target brightness value and target contrast value corresponding to the first display screen based on the basic brightness coefficient and contrast coefficient, the brightness adjustment method further includes: Obtain the current brightness and contrast ratio of the first display screen; The target brightness value and target contrast ratio of the first display screen are determined based on the base brightness coefficient and contrast coefficient, respectively, including: The basic luminance coefficient and contrast coefficient are determined based on the illuminance value and color temperature value; Calculate the product of the current brightness value and the base brightness coefficient to obtain the first value, and determine the first value as the target brightness value; Calculate the product of the current contrast ratio and the contrast coefficient to obtain the second value, and determine the second value as the target contrast ratio.

[0009] In some embodiments of this disclosure, the color temperature adjustment parameters include a color temperature compensation coefficient and a color temperature offset.

[0010] The target color temperature value corresponding to the first ambient light is determined based on the color temperature adjustment parameters, including: Obtain the first color temperature value corresponding to the first ambient light; Calculate the product of the color temperature compensation coefficient and the first color temperature value to obtain the third value. Calculate the sum of the third value and the color temperature offset to obtain the second color temperature value. The second color temperature value is determined as the target color temperature value for adjusting the first ambient light.

[0011] In some embodiments of this disclosure, after obtaining the illuminance value and color temperature value corresponding to the current ambient light of the vehicle, the brightness adjustment method further includes: Acquire the exterior image information corresponding to the vehicle; In the event that a transient glare event has occurred based on illuminance value, color temperature value and external image information, the first brightness value corresponding to the second display screen is obtained; A second brightness value is determined for adjusting the second display screen based on a first brightness value and a preset brightness adjustment rule. The second brightness value is lower than the first brightness value. The brightness of the second display screen is adjusted based on the second brightness value. If it is determined that there is a second ambient light in the same area as the second display screen and it is turned on, the color of the second ambient light is adjusted to the target color and the brightness value of the second ambient light is adjusted to the lowest brightness value corresponding to the second ambient light.

[0012] In some embodiments of this disclosure, determining whether a transient glare event has occurred based on illuminance values, color temperature values, and exterior image information includes: Based on the illuminance value and color temperature value, determine whether the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, and whether the second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold. Then, identify the external image information to determine whether there is an oncoming vehicle and whether the target vehicle is in the state of having its high beams on. A transient glare event is determined to have occurred if, based on illuminance and color temperature values, the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, the second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold, and based on external image information, it is determined that there is an oncoming vehicle with its high beams on.

[0013] In some embodiments of this disclosure, adjusting the brightness of the first display screen based on a target brightness value includes: Obtain the current brightness value corresponding to the first display screen; A smoothing coefficient is determined based on the current brightness value. The target brightness value is then exponentially smoothed based on the smoothing coefficient to obtain the current output brightness value. The brightness of the first display screen is then adjusted based on the current output brightness value.

[0014] A second aspect of this disclosure provides a brightness adjustment device, including: The information acquisition module is used to acquire the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle. The information determination module is used to determine the basic brightness coefficient, contrast coefficient, and color temperature adjustment parameters based on the illuminance value and color temperature value; to determine the target brightness value and target contrast value corresponding to the first display screen based on the basic brightness coefficient and contrast coefficient respectively; and to determine the target color temperature value corresponding to the first ambient light based on the color temperature adjustment parameters. The first ambient light is an ambient light that is located in the same area as the first display screen and is in the on state. The brightness adjustment module is used to adjust the display effect of the first display screen based on the target brightness value and the target contrast ratio, and to adjust the first ambient light based on the target color temperature value.

[0015] In some embodiments of this disclosure, the information acquisition module is specifically used to acquire the illuminance value corresponding to the current ambient light and the response signal value corresponding to each color channel based on the target sensor. The target sensor is a sensor corresponding to the first display screen. The response signal value is linearly transformed based on a preset transformation matrix to obtain the tristimulus value corresponding to the current ambient light. The preset transformation matrix is ​​a matrix used to map the response signal value of the color channel to the tristimulus value of the standard colorimetric system. The tristimulus value includes a red stimulus value used to characterize the intensity of the red component in the color, a green stimulus value used to characterize the intensity of the green component in the color, and a blue stimulus value used to characterize the intensity of the blue component in the color. Color temperature values ​​are determined based on tristimulus values.

[0016] In some embodiments of this disclosure, the information acquisition module is further specifically used to calculate the chromaticity coordinates corresponding to the current ambient light based on the tristimulus values; Color temperature values ​​are determined based on chromaticity coordinates.

[0017] In some embodiments of this disclosure, the brightness adjustment device further includes a display screen information acquisition module.

[0018] The display information acquisition module is used to acquire the current brightness value and current contrast of the first display screen before determining the target brightness value and target contrast value of the first display screen based on the basic brightness coefficient and contrast coefficient, respectively.

[0019] The information determination module is specifically used to calculate the product of the current brightness value and the basic brightness coefficient to obtain a first value, and to determine the first value as the target brightness value; Calculate the product of the current contrast ratio and the contrast coefficient to obtain the second value, and determine the second value as the target contrast ratio.

[0020] In some embodiments of this disclosure, the color temperature adjustment parameters include a color temperature compensation coefficient and a color temperature offset.

[0021] The information determination module is also specifically used to obtain the first color temperature value corresponding to the first ambient light; Calculate the product of the color temperature compensation coefficient and the first color temperature value to obtain the third value. Calculate the sum of the third value and the color temperature offset to obtain the second color temperature value. The second color temperature value is determined as the target color temperature value for adjusting the first ambient light.

[0022] In some embodiments of this disclosure, the brightness adjustment device further includes a transient strong light event determination module.

[0023] The transient strong light event determination module is used to obtain the vehicle's external image information after acquiring the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle. In the event that a transient glare event has occurred based on illuminance value, color temperature value and external image information, the first brightness value corresponding to the second display screen is obtained; A second brightness value is determined for adjusting the second display screen based on a first brightness value and a preset brightness adjustment rule. The second brightness value is lower than the first brightness value. The brightness of the second display screen is adjusted based on the second brightness value. If it is determined that there is a second ambient light in the same area as the second display screen and it is turned on, the color of the second ambient light is adjusted to the target color and the brightness value of the second ambient light is adjusted to the lowest brightness value corresponding to the second ambient light.

[0024] In some embodiments of this disclosure, the transient strong light event determination module is specifically used to determine whether the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold and whether the second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold, and to identify the external image information to determine whether there is an oncoming vehicle and whether the target vehicle is in the state of having its high beams on. A transient glare event is determined to have occurred if, based on illuminance and color temperature values, the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, the second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold, and based on external image information, it is determined that there is an oncoming vehicle with its high beams on.

[0025] In some embodiments of this disclosure, the brightness adjustment module is specifically used to obtain the current brightness value corresponding to the first display screen; A smoothing coefficient is determined based on the current brightness value. The target brightness value is then exponentially smoothed based on the smoothing coefficient to obtain the current output brightness value. The brightness of the first display screen is then adjusted based on the current output brightness value.

[0026] A third aspect of this disclosure provides an electronic device, including: processor; Memory, used to store executable instructions; The processor is used to read executable instructions from memory and execute the executable instructions to implement the brightness adjustment method provided in the first aspect above.

[0027] A fourth aspect of this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to implement the brightness adjustment method provided in the first aspect.

[0028] A fifth aspect of this disclosure provides a computer program product comprising a computer program or instructions that, when executed by a processor, implement the brightness adjustment method of the first aspect described above.

[0029] A sixth aspect of this disclosure provides a vehicle that includes electronic equipment provided in the third aspect.

[0030] The technical solution provided in this disclosure has the following advantages: The brightness adjustment method, device, and vehicle provided in this disclosure can acquire the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle; determine a basic brightness coefficient, contrast coefficient, and color temperature adjustment parameters based on the illuminance and color temperature values; determine the target brightness and target contrast values ​​corresponding to the first display screen based on the basic brightness and contrast coefficients, and determine the target color temperature value corresponding to the first ambient light based on the color temperature adjustment parameters. The first ambient light is an ambient light located in the same area as the first display screen and is in an on state; adjust the display effect of the first display screen based on the target brightness and target contrast values, and adjust the first ambient light based on the target color temperature value. Therefore, by determining the color temperature value, it is possible to distinguish ambient light with the same illuminance but completely different spectral compositions. By combining the illuminance and color temperature values ​​to determine the basic brightness and contrast coefficients, the brightness and contrast of the first display screen can be adjusted, allowing the white point of the first display screen to dynamically match the color and intensity of the ambient light, thereby eliminating the color temperature difference between the first display screen and the background, reducing visual conflict and fatigue. By using the color temperature value to adjust the contrast, it can adapt to text readability and image softness under different lighting environments, maintaining the consistency of color perception. Meanwhile, during the adjustment of the first display screen based on illuminance and color temperature values, the color temperature of the ambient light is adjusted. This brings the ambient light's color temperature closer to the white point of the first display screen, eliminating abrupt color temperature changes at the screen edges and creating a smooth transition between the screen and background. This eliminates the visual disjointedness caused by the color temperature difference between the display and the environment. Simultaneously, adjusting both the brightness and contrast of the display screen prevents glare and blinding effects when the ambient light brightens, keeping the screen in its optimal viewing position. Furthermore, adjusting the ambient light in the same area as the display screen during the adjustment process achieves synchronized control between the display and the ambient light, ensuring visual consistency between the display and the background. This improves user visual comfort and color perception when ambient light changes, providing a stable and comfortable visual experience in various complex lighting environments. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0032] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a flowchart of a brightness adjustment method provided in an embodiment of this disclosure; Figure 2 This is a flowchart of a method for determining color temperature values ​​provided in an embodiment of this disclosure; Figure 3 This is a flowchart of another brightness adjustment method provided in this embodiment of the disclosure; Figure 4 This is a schematic diagram of the structure of a brightness adjustment device provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0035] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0036] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0039] Currently, the automatic brightness adjustment technology of vehicle interior lighting and display systems (such as instrument panel, central control screen, ambient lighting, etc.) mainly relies on the illuminance parameters collected by ambient light sensors as the sole basis for adjustment. That is, the brightness of the display interface and interior lighting is adjusted according to the detected ambient light intensity.

[0040] However, different light sources, even under the same illuminance, have drastically different effects on human visual comfort, contrast sensitivity, and color recognition. Therefore, brightness adjustment mechanisms based solely on illuminance cannot distinguish the differences in the spectral composition of different light sources. This leads to situations where, in environments with a spectral energy distribution predominantly in the long-wavelength band, the display interface may suffer from insufficient contrast, affecting the clarity of information reading; conversely, in environments with a spectral energy distribution predominantly in the short-wavelength band, glare may exacerbate driver visual fatigue. Furthermore, current automatic brightness adjustment technologies operate with independent logic for the adjustment of the display screen, ambient lighting, etc., lacking coordination. Consequently, the impact on user visual comfort, color perception, and visual fatigue varies significantly during actual use, making it difficult to maintain a stable and comfortable visual experience under various complex lighting conditions. To address this issue, this disclosure provides a brightness adjustment method, which will be described below with reference to specific embodiments.

[0041] Figure 1This is a flowchart of a brightness adjustment method provided in an embodiment of the present disclosure. The method can be executed by a brightness adjustment device, which can be implemented in software and / or hardware. The brightness adjustment device can be configured in an electronic device, such as a server or terminal, wherein the terminal specifically includes an in-vehicle terminal, a computer or a tablet computer, etc.

[0042] like Figure 1 As shown, the brightness adjustment method provided in this embodiment includes the following steps.

[0043] S110. Obtain the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle.

[0044] In this embodiment of the disclosure, the illuminance value can be understood as the visible light flux received per unit area.

[0045] Color temperature can be understood as the temperature of a blackbody when it is heated to a certain temperature and the color of the light it emits is the same as the color of light from a certain light source.

[0046] Specifically, the brightness adjustment device, in response to a brightness adjustment command, controls the target sensor at the vehicle's target location to collect the illuminance value corresponding to the current ambient light and the response signal values ​​corresponding to each color channel. The collected illuminance value is then determined as the illuminance value corresponding to the current ambient light, and the color temperature value of the current ambient light is calculated based on the response signal values ​​corresponding to each color channel and a preset algorithm. The target sensor can be an integrated sensor incorporating an illuminance detection unit, a multi-channel photosensitive unit, etc. The target sensor can be positioned above the vehicle's windshield, in the center of the dashboard, etc. The specific location of the target sensor varies depending on the position of the display screen and ambient lights to be adjusted in the lighting and display system, and is not limited here.

[0047] S120. Determine the basic brightness coefficient, contrast coefficient, and color temperature adjustment parameters based on the illuminance value and color temperature value; determine the target brightness value and target contrast value corresponding to the first display screen based on the basic brightness coefficient and contrast coefficient respectively; and determine the target color temperature value corresponding to the first ambient light based on the color temperature adjustment parameters.

[0048] In this embodiment of the disclosure, the first display screen can be any display screen on the vehicle, such as the instrument panel screen, the front center console screen, etc., and there is no limitation.

[0049] Among them, the base brightness coefficient is a coefficient used to adjust the overall brightness; the contrast coefficient is a coefficient used to adjust the contrast of the display screen; and the color temperature compensation coefficient and color temperature offset are parameters used to adjust the color temperature of the ambient light.

[0050] Color temperature adjustment parameters are used to adjust the color temperature of ambient lights, and can specifically include color temperature compensation coefficient and color temperature offset.

[0051] The first ambient light is an ambient light located in the same area as the first display screen and in an on state. For example, when the first display screen is a front center console screen, the first ambient light can be an ambient light that is on around the front center console screen. The specific type can vary depending on the actual application scenario and settings, and is not limited here.

[0052] In this embodiment, determining the basic luminance coefficient and contrast coefficient based on illuminance and color temperature values ​​can specifically include: obtaining a preset fitting function, inputting the illuminance and color temperature values ​​into the preset fitting function, and obtaining the basic luminance coefficient, contrast coefficient, color temperature compensation coefficient, and color temperature offset. The preset fitting function is constructed by establishing a database of visual clarity and comfort under different ambient light conditions (especially at different color temperatures) through extensive real-world roadside and visual ergonomic experiments. The preset fitting function is used to characterize the correspondence between illuminance and color temperature values ​​and the basic luminance coefficient, contrast coefficient, color temperature compensation coefficient, and color temperature offset.

[0053] Specifically, after acquiring the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle, the brightness adjustment device determines coefficients for adjusting the brightness and contrast of the first display screen based on the illuminance and color temperature values, respectively. Based on these coefficients, the brightness and color temperature values ​​of the first display screen are adjusted to obtain the target brightness and target contrast values ​​for the first display screen. Simultaneously, a first ambient light is identified, and based on the current illuminance and color temperature values ​​of the ambient light, a color temperature compensation coefficient and a color temperature offset are determined for adjusting the color temperature of the first ambient light. Then, the target color temperature value corresponding to the first ambient light is determined based on the color temperature compensation coefficient and the color temperature offset.

[0054] S130: Adjust the display effect of the first display screen based on the target brightness value and the target contrast ratio, and adjust the first ambient light based on the target color temperature value.

[0055] Specifically, after determining the target brightness and target contrast values ​​corresponding to the first display screen, and the target color temperature value corresponding to the first ambient light, the brightness adjustment device adjusts the brightness and contrast of the first display screen to the target brightness and contrast values. Simultaneously, it controls the color temperature of the first ambient light to be adjusted to the target color temperature value.

[0056] In this embodiment, the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle can be obtained. Based on the illuminance and color temperature values, a target brightness and target contrast value corresponding to the first display screen, and a target color temperature value corresponding to the first ambient light (which is located in the same area as the first display screen and is turned on) are determined. The display effect of the first display screen is adjusted based on the target brightness and target contrast values, and the first ambient light is adjusted based on the target color temperature value. Therefore, by determining the color temperature value, ambient light with the same illuminance but drastically different spectral compositions can be distinguished. The basic brightness coefficient and contrast coefficient are determined by combining the illuminance and color temperature values, thereby adjusting the brightness and contrast of the first display screen. This allows the white point of the first display screen to dynamically match the color and intensity of the ambient light, eliminating the color temperature difference between the first display screen and the background, reducing visual conflict and fatigue. By adjusting the contrast using the color temperature value, text readability and image softness can be adaptively adjusted under different lighting environments, maintaining consistency in color perception. Meanwhile, during the adjustment of the first display screen based on illuminance and color temperature values, the color temperature of the ambient light is adjusted. This brings the ambient light's color temperature closer to the white point of the first display screen, eliminating abrupt color temperature changes at the screen edges and creating a smooth transition between the screen and background. This eliminates the visual disjointedness caused by the color temperature difference between the display and the environment. Simultaneously, adjusting both the brightness and contrast of the display screen prevents glare and blinding effects when the ambient light brightens, keeping the screen in its optimal viewing position. Furthermore, adjusting the ambient light in the same area as the display screen during the adjustment process achieves synchronized control between the display and the ambient light, ensuring visual consistency between the display and the background. This improves user visual comfort and color perception when ambient light changes, providing a stable and comfortable visual experience in various complex lighting environments.

[0057] Based on the embodiments disclosed above, the display screen and ambient light can be linked for control, ensuring that the color temperature of the ambient light is consistent with the main visual effect of the display screen and the ambient light, making the colors on the display screen appear purer, enhancing the subjective perception of contrast, and improving the user's viewing immersion. At the same time, during brightness adjustment, it can automatically adjust according to changes in ambient light without manual intervention from the user, ensuring the best display effect in different scenarios and simplifying user operation.

[0058] In this embodiment of the disclosure, the brightness adjustment device can determine the color temperature value by combining the response signals corresponding to each color channel of the current ambient light, thereby improving the accuracy of the color temperature value determination.

[0059] The following is combined Figure 2 The specific details of determining color temperature values ​​are explained in detail.

[0060] Figure 2 This is a flowchart of a method for determining color temperature values ​​provided in an embodiment of this disclosure. Figure 2 As shown, obtaining the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle can specifically include the following steps: S210. Based on the target sensor, collect the illuminance value corresponding to the current ambient light and the response signal value corresponding to each color channel.

[0061] In this embodiment of the disclosure, the target sensor can be an integrated sensor that integrates an illuminance detection unit, a multi-channel photosensitive unit, and the like.

[0062] The target sensor can be a sensor corresponding to the first display screen. That is, the target sensor can be a sensor used to detect the ambient light around the first display screen during the brightness adjustment process. For example, if the first display screen is a front-row center console screen, the target sensor can be a sensor located above the windshield, in the middle of the dashboard, or similar locations.

[0063] Each color channel includes the red channel R, green channel G, blue channel B, transparent channel (without filter) C, and white channel W.

[0064] Specifically, the brightness adjustment device can respond to a brightness adjustment command by controlling the target sensor at the vehicle's target position to collect the illuminance value corresponding to the current ambient light and the response signal values ​​corresponding to each color channel. When illuminated by ambient light, each color channel outputs a voltage or digital signal proportional to the energy integral value of the incident light in that wavelength band, i.e., the response signal value.

[0065] S220. Based on the preset transformation matrix, the response signal value is linearly transformed to obtain the tristimulus value corresponding to the current ambient light.

[0066] In this embodiment, the preset transformation matrix can be understood as a matrix used to map the response signal values ​​of the color channels to the tristimulus values ​​of a standard colorimetric system. The preset transformation matrix is ​​obtained by calibrating the sensor in a laboratory using a standard light source with a known spectrum. The standard colorimetric system can be the International Commission on Illumination (CIE) XYZ colorimetric system, a mathematical model based on the characteristics of human eye perception, used to accurately and objectively describe and quantify color.

[0067] Specifically, tristimulus values ​​can include red stimulus values ​​for characterizing the intensity of the red component in a color, green stimulus values ​​for characterizing the intensity of the green component in a color, and blue stimulus values ​​for characterizing the intensity of the blue component in a color.

[0068] Specifically, after obtaining the response signal values ​​corresponding to each color channel, the brightness adjustment device can obtain a preset transformation matrix from the target database, and perform a linear transformation on the response signal values ​​through the transformation matrix to obtain the tristimulus values ​​corresponding to the current ambient light.

[0069] The specific formula for performing the linear transformation is as follows: .

[0070] in, This is the tristimulus value vector in the standard CIE XYZ chromaticity system; is the response signal value vector of each color channel; M is the preset transformation matrix.

[0071] S230, color temperature value is determined based on tristimulus values.

[0072] In this embodiment of the disclosure, determining the color temperature value based on tristimulus values ​​may specifically include: calculating the chromaticity coordinates corresponding to the current ambient light based on the tristimulus values; and determining the color temperature value based on the chromaticity coordinates.

[0073] Among them, chromaticity coordinates are two-dimensional coordinates used to describe the hue and saturation of a color.

[0074] Specifically, after acquiring the tristimulus values, the brightness adjustment device calculates the sum of the red, green, and blue stimulus values ​​to obtain the sum of the three stimulus values. The ratio of the red stimulus value (representing the intensity of the red component in the color) to the sum of the three stimulus values ​​is determined as the x-value of the chromaticity coordinates (i.e., representing the red chromaticity component). The ratio of the green stimulus value (representing the intensity of the green component in the color) to the sum of the three stimulus values ​​is determined as the y-value of the chromaticity coordinates (i.e., representing the green chromaticity component), thus obtaining the chromaticity coordinates. After obtaining the chromaticity coordinates, the temperature corresponding to the point closest to these coordinates is determined in the CIE chromaticity diagram, and this temperature is determined as the color temperature value.

[0075] In the CIE chromaticity diagram, the blackbody radiation locus (Planck locus) is a curve that represents the chromaticity points of light emitted by an absolute blackbody at different temperatures, from red to yellow to white.

[0076] In some examples, determining the temperature corresponding to the point closest to a chromaticity coordinate in a CIE chromaticity diagram can include: using a lookup table to find the temperature corresponding to the chromaticity coordinate from a pre-defined table of correspondences between chromaticity coordinates and color temperature values, and then determining that temperature as the color temperature value.

[0077] In other examples, determining the temperature corresponding to the point closest to a given chromaticity coordinate in a CIE chromaticity diagram can include: using an empirical formula to perform a polynomial calculation on the chromaticity coordinates to obtain the color temperature value. The calculation formula is: CCT = A0 + A1 * exp(-n / τ) + ..., where CCT represents the color temperature value; A0 is the constant term coefficient; A1 is the exponential term coefficient; τ is the attenuation coefficient; and n is a value related to the chromaticity coordinates.

[0078] In this embodiment, a preset transformation matrix can be used to linearly transform the response signal value, effectively correcting the differences between the spectral response curves of each sensor channel and the standard color matching function of the human eye. This eliminates crosstalk between channels and individual hardware deviations, enabling different sensors or devices to output consistent color temperature results under the same ambient light. Simultaneously, it ensures that the color temperature calculation conforms to the internationally recognized CIE colorimetric standard, and the calculation results are traceable and comparable. Furthermore, the color temperature value determined based on standard tristimulus values ​​can accurately reflect the warm and cool characteristics of ambient light, providing an accurate and reliable basis for the adaptive adjustment of display brightness and color temperature, significantly improving user visual comfort and color perception consistency under different lighting conditions.

[0079] In this embodiment of the disclosure, before determining the target brightness value and target contrast value corresponding to the first display screen based on the basic brightness coefficient and contrast coefficient respectively, the brightness adjustment method may further include: obtaining the current brightness value and current contrast value corresponding to the first display screen.

[0080] Specifically, the brightness adjustment device can control a preset interface to read the current brightness value and current contrast ratio corresponding to the first display screen. It should be noted that other common methods for obtaining the current brightness value and current contrast ratio can also be used, and are not limited here.

[0081] Furthermore, the target brightness value and target contrast ratio of the first display screen are determined based on the base brightness coefficient and contrast ratio, respectively. Specifically, this may include: determining the base brightness coefficient and contrast ratio based on the illuminance value and color temperature value; calculating the product of the current brightness value and the base brightness coefficient to obtain a first value, and determining the first value as the target brightness value; calculating the product of the current contrast ratio and the contrast ratio to obtain a second value, and determining the second value as the target contrast ratio.

[0082] In this embodiment, the base brightness coefficient and contrast coefficient can be dynamically adjusted using illuminance value, color temperature value, and fitting function. This improves the accuracy of brightness and contrast determination, allowing the screen's grayscale levels and color contrast to match the visual perception characteristics under different ambient light conditions. For example, in warm-colored, low-illuminance environments, the contrast can be appropriately reduced to decrease glare, while in cool-colored, high-illuminance environments, the contrast can be increased to ensure detail visibility. This avoids the problem of traditional single brightness adjustment resulting in brightness adaptation but unsuitable visual contrast in different color temperature environments. It enables the screen to present optimal readability and comfort under various complex lighting conditions, significantly improving the user's visual experience during extended use.

[0083] In this embodiment of the disclosure, determining the target color temperature value corresponding to the first ambient light based on the color temperature adjustment parameters may specifically include: obtaining the first color temperature value corresponding to the first ambient light; calculating the product of the color temperature compensation coefficient and the first color temperature value to obtain a third value; calculating the sum of the third value and the color temperature offset to obtain a second color temperature value; and determining the second color temperature value as the target color temperature value for adjusting the first ambient light.

[0084] In this embodiment, the color temperature compensation coefficient and color temperature offset can be dynamically adjusted using illuminance value, color temperature value, and fitting function, improving the accuracy of determining the color temperature compensation coefficient and color temperature offset, thereby improving the accuracy of the color temperature value. During the adjustment of the display screen, the ambient lighting is also adjusted, establishing a linkage adjustment mechanism between the display screen and the ambient lighting to avoid mutual interference and achieve overall coordination of the in-vehicle lighting environment, thus improving the user experience.

[0085] In this embodiment of the disclosure, the brightness adjustment device can also determine whether there is a transient glare event based on the illuminance value and color temperature value corresponding to the current ambient light of the vehicle after obtaining the illuminance value and color temperature value. If a transient glare event is determined to exist, a corresponding anti-glare optimization strategy is adopted to improve the user's visual experience.

[0086] The following will combine Figure 3 This section provides a detailed explanation of how to adjust brightness in the presence of transient bright light events.

[0087] Figure 3 This is a flowchart of another brightness adjustment method provided in an embodiment of this disclosure. Figure 3 As shown, the brightness adjustment method may include the following steps: S310. Obtain the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle.

[0088] In this embodiment of the disclosure, the specific implementation of step S310 is similar to that of step S110 in the above embodiments of the disclosure, and will not be described in detail here.

[0089] S320: Obtain the exterior image information corresponding to the vehicle.

[0090] In this embodiment of the disclosure, the exterior image information may include image information of the front of the vehicle.

[0091] Specifically, the brightness adjustment device can control the image acquisition equipment in the vehicle to acquire images and obtain corresponding external image information of the vehicle. The image acquisition equipment can be a camera, lidar, or other device installed on the vehicle that can capture images of the area directly in front of the vehicle.

[0092] It should be noted that the execution order of steps S310 and S320 is not restricted. Steps S310 and S320 can be executed simultaneously, or step S310 can be executed after step S320, or step S310 can be executed before step S320.

[0093] Furthermore, after acquiring the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle, as well as the external image information, the brightness adjustment device can determine whether a transient glare event has occurred based on the illuminance, color temperature, and external image information, so as to take appropriate measures.

[0094] Specifically, determining whether a transient glare event has occurred based on illuminance values, color temperature values, and external image information may include: determining whether the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, and whether the second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold, and identifying the external image information to determine whether there is an oncoming vehicle and whether the oncoming vehicle is using its high beams; if the illuminance value of the current ambient light within a preset time period is greater than the first threshold, the color temperature value of the current ambient light within a preset time period is greater than the second threshold, and the external image information indicates the presence of an oncoming vehicle with its high beams on, then a transient glare event is determined to have occurred.

[0095] Specifically, the brightness adjustment device can acquire the illuminance and color temperature values ​​of ambient light within a preset time period, calculate the first change in the illuminance value within the preset time period, compare the first change with a first threshold, and determine whether the first change is greater than the first threshold; calculate the second change in the color temperature value within the preset time period, compare the second change with a second threshold, and determine whether the second change is greater than the second threshold; simultaneously, input the external image information into a preset machine learning model, which identifies the external image information and detects target objects to determine whether there is an oncoming vehicle and whether the target vehicle is in a high-beam state; if it is determined that the first change in the current ambient light illuminance value within the preset time period is greater than the first threshold, the second change in the current ambient light color temperature value within the preset time period is greater than the second threshold, and based on the external image information, it is determined that there is an oncoming vehicle and the oncoming vehicle is in a high-beam state, a transient glare event is determined to have occurred; otherwise, it is determined that no transient glare event has occurred.

[0096] For example, the target sensor samples at a high frequency (e.g., 100Hz). When it detects an order-of-magnitude jump in illuminance within a very short time (e.g., 50ms) accompanied by a sharp increase in color temperature (e.g., >6000K), combined with camera signals (e.g., detecting oncoming vehicle lights), it can be determined as a transient glare event.

[0097] If a transient intense light event is determined to have occurred, proceed with steps S330 to S350.

[0098] S330: If a transient glare event is determined to have occurred based on the illuminance value, color temperature value, and external image information, the first brightness value corresponding to the second display screen is obtained.

[0099] In this embodiment of the disclosure, the specific implementation method for obtaining the first brightness value corresponding to the second display screen is similar to the specific implementation method for obtaining the current brightness value corresponding to the first display screen in the above embodiments of the disclosure, and will not be described again here.

[0100] S340. Determine a second brightness value for adjusting the second display screen based on the first brightness value and a preset brightness adjustment rule.

[0101] In this embodiment of the disclosure, the second brightness value is lower than the first brightness value.

[0102] The preset brightness adjustment rule may include reducing the current first brightness value by a preset percentage to obtain the adjustment amount corresponding to the first brightness value, and then determining the second brightness value based on the adjustment amount. For example, the first brightness value may be reduced by 20%. It may also include determining the adjustment amount corresponding to the first brightness value based on the correspondence between the preset illuminance value, color temperature value and the brightness value, and then determining the second brightness value based on the adjustment amount.

[0103] S350: Adjust the brightness of the second display screen based on the second brightness value, and if it is determined that there is a second ambient light in the same area as the second display screen and it is in the on state, adjust the color of the second ambient light to the target color and adjust the brightness value of the second ambient light to the lowest brightness value corresponding to the second ambient light.

[0104] In this embodiment of the disclosure, the target color can be a color that is comfortable for the user's eyes. For example, the target color can be dark red. The reason for this is that the human eye's night vision (dominated by rod cells) is least sensitive to red light. This measure can maximize the protection of the user's (such as the driver's) night vision and shorten their recovery time from glare.

[0105] In this embodiment, upon detecting a transient glare event, the screen brightness can be rapidly reduced, while the color and brightness of the ambient lighting are adjusted to prevent glare from the bright interface on the windshield or side windows, thereby reducing the driver's momentary visual discomfort and glare and ensuring clear observation of external road conditions. Secondly, this dynamic adjustment optimizes the driving experience. By actively and smoothly adjusting the in-vehicle lighting environment, it avoids the discomfort caused by sudden changes in glare leading to severe pupil constriction. Simultaneously, it can adjust the ambient lighting to a soft, low color temperature, reducing light interference and creating a more comfortable, eye-friendly cabin atmosphere, allowing both the driver and passengers to adapt more quickly to sudden changes in external light.

[0106] In this embodiment of the disclosure, during the process of adjusting the display effect of the first display screen, an exponential smoothing algorithm can be used to achieve a gradual transition, avoiding discomfort caused by abrupt changes.

[0107] In this embodiment of the disclosure, adjusting the brightness of the first display screen based on a target brightness value may specifically include: obtaining the current brightness value corresponding to the first display screen; determining a smoothing coefficient based on the current brightness value; performing exponential smoothing on the target brightness value based on the smoothing coefficient to obtain a current output brightness value; and adjusting the brightness of the first display screen based on the current output brightness value.

[0108] In this embodiment of the disclosure, the brightness adjustment device can determine the smoothing coefficient based on the sensor sampling period, the desired system response time, and the preset correspondence between the sensor sampling period, the desired system response time, and the smoothing coefficient. Then, it can perform exponential smoothing on the target brightness value according to the smoothing coefficient and the preset exponential smoothing formula to obtain the current output brightness value, and adjust the brightness of the first display screen based on the current output brightness value.

[0109] The relationship between the preset sensor sampling period, the expected system response time, and the smoothing coefficient is established by collecting a large amount of raw ambient light data from real vehicles (covering normal changes and sudden interference), processing the data with algorithms using different smoothing coefficient α values ​​(such as 0.02, 0.05, 0.1, 0.3, etc.), evaluating tracking delay and noise suppression capabilities, and eliminating obviously unqualified parameters. Next, real-vehicle testing and human factors engineering verification are conducted: the selected sets of parameters are placed into the real vehicle controller, and testers of different ages and vision levels drive the vehicle in typical scenarios such as tunnel entry / exit, tree-lined roads, and oncoming high beams. Their subjective ratings of visual comfort, information clarity, and adjustment abruptness are collected, and correlation analysis is performed to derive the parameter with the highest comprehensive score, ultimately forming a set of smoothing coefficients for different scenarios. For example, the normal mode smoothing coefficient α is small, used for slow daily light changes; the fast mode smoothing coefficient α is medium, used for medium-speed changes; and the emergency mode smoothing coefficient α is close to 1, used for transient strong light.

[0110] The preset exponential smoothing formula is: Current output brightness value = α × Current brightness value + (1-α) × previous brightness output value.

[0111] In this embodiment of the disclosure, the brightness of the display screen can be adjusted in a smooth transition manner, avoiding discomfort to the user's vision caused by abrupt changes in brightness, reducing visual attention interference, and improving user comfort and immersion.

[0112] In this embodiment of the disclosure, in order to accurately distinguish between real changes in ambient light and instantaneous interference, a jitter discrimination mechanism is preset to make a comprehensive judgment based on time thresholds and amplitude thresholds.

[0113] The brightness adjustment device responds to a change in illuminance and / or color temperature detected by the target sensor. The system starts a timer and continuously monitors the duration and amplitude of this change. If the change returns to its original state within a time threshold, or if its fluctuation amplitude never exceeds a set amplitude threshold, it is considered an invalid jitter, and no brightness and / or color temperature adjustment command is initiated; the output value remains stable. Conversely, if the change amplitude exceeds the amplitude threshold and the duration exceeds the time threshold, it is considered a genuine and valid ambient light change. The signal is then allowed, and the new illuminance and / or color temperature value is used as the target value. Based on a smooth transition algorithm, the display screen and ambient light are gradually adjusted. This filters out transient light fluctuations caused by swaying leaves, brief shadows, etc., preventing unnecessary brightness or color temperature adjustments to the display screen and ambient light due to invalid jitter, ensuring the stability of brightness adjustment, and significantly reducing the computational burden and output frequency of the control system.

[0114] In this embodiment, the brightness adjustment device can adjust the display effect of the first display screen based on the target brightness value and the target contrast ratio, and adjust the first ambient light based on the target color temperature value. Then, it can obtain user feedback information within the target time period, wherein the feedback information includes the user's manual operation information for the adjustment. Based on the user's feedback information, it can determine the user's preference information and provide personalized recommendations in similar scenarios to improve the user experience.

[0115] Figure 4 This is a schematic diagram of the structure of a brightness adjustment device provided in an embodiment of this disclosure.

[0116] In this embodiment, the brightness adjustment device can be disposed within an electronic device and is understood as a functional module of the aforementioned electronic device. Specifically, the electronic device can be a server or a terminal, wherein the terminal specifically includes an in-vehicle terminal, a computer, or a tablet computer, etc., and is not limited thereto.

[0117] like Figure 4 As shown, the brightness adjustment device 400 may include an information acquisition module 410, an information determination module 420, and a brightness adjustment module 430.

[0118] The information acquisition module 410 can be used to acquire the illuminance value and color temperature value corresponding to the current ambient light of the vehicle; The information determination module 420 can be used to determine the basic brightness coefficient, contrast coefficient and color temperature adjustment parameters based on the illuminance value and color temperature value; determine the target brightness value and target contrast value corresponding to the first display screen based on the basic brightness coefficient and contrast coefficient respectively; determine the target color temperature value corresponding to the first ambient light based on the color temperature adjustment parameters; the first ambient light is an ambient light that is in the same area as the first display screen and is in the on state. The brightness adjustment module 430 can be used to adjust the display effect of the first display screen based on the target brightness value and the target contrast ratio, and to adjust the first ambient light based on the target color temperature value.

[0119] In this embodiment, the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle can be obtained. Based on the illuminance and color temperature values, a target brightness and target contrast value corresponding to the first display screen, and a target color temperature value corresponding to the first ambient light (which is located in the same area as the first display screen and is turned on) are determined. The display effect of the first display screen is adjusted based on the target brightness and target contrast values, and the first ambient light is adjusted based on the target color temperature value. Therefore, by determining the color temperature value, ambient light with the same illuminance but drastically different spectral compositions can be distinguished. The basic brightness coefficient and contrast coefficient are determined by combining the illuminance and color temperature values, thereby adjusting the brightness and contrast of the first display screen. This allows the white point of the first display screen to dynamically match the color and intensity of the ambient light, eliminating the color temperature difference between the first display screen and the background, reducing visual conflict and fatigue. By adjusting the contrast using the color temperature value, text readability and image softness can be adaptively adjusted under different lighting environments, maintaining consistency in color perception. Meanwhile, during the adjustment of the first display screen based on illuminance and color temperature values, the color temperature of the ambient light is adjusted. This brings the ambient light's color temperature closer to the white point of the first display screen, eliminating abrupt color temperature changes at the screen edges and creating a smooth transition between the screen and background. This eliminates the visual disjointedness caused by the color temperature difference between the display and the environment. Simultaneously, adjusting both the brightness and contrast of the display screen prevents glare and blinding effects when the ambient light brightens, keeping the screen in its optimal viewing position. Furthermore, adjusting the ambient light in the same area as the display screen during the adjustment process achieves synchronized control between the display and the ambient light, ensuring visual consistency between the display and the background. This improves user visual comfort and color perception when ambient light changes, providing a stable and comfortable visual experience in various complex lighting environments.

[0120] In some embodiments of this disclosure, the information acquisition module 410 may be specifically used to acquire the illuminance value corresponding to the current ambient light and the response signal value corresponding to each color channel based on the target sensor, wherein the target sensor is a sensor corresponding to the first display screen; The response signal value is linearly transformed based on a preset transformation matrix to obtain the tristimulus value corresponding to the current ambient light. The preset transformation matrix is ​​a matrix used to map the response signal value of the color channel to the tristimulus value of the standard colorimetric system. The tristimulus value includes a red stimulus value used to characterize the intensity of the red component in the color, a green stimulus value used to characterize the intensity of the green component in the color, and a blue stimulus value used to characterize the intensity of the blue component in the color. Color temperature values ​​are determined based on tristimulus values.

[0121] In some embodiments of this disclosure, the information acquisition module 410 may also be specifically used to calculate the chromaticity coordinates corresponding to the current ambient light based on the tristimulus values; Color temperature values ​​are determined based on chromaticity coordinates.

[0122] In some embodiments of this disclosure, the brightness adjustment device 400 may further include a display screen information acquisition module.

[0123] The display information acquisition module can be used to acquire the current brightness value and current contrast of the first display screen before determining the target brightness value and target contrast value of the first display screen based on the basic brightness coefficient and contrast coefficient, respectively.

[0124] The information determination module 420 can be specifically used to determine the basic luminance coefficient and contrast coefficient based on the illuminance value and color temperature value; Calculate the product of the current brightness value and the base brightness coefficient to obtain the first value, and determine the first value as the target brightness value; Calculate the product of the current contrast ratio and the contrast coefficient to obtain the second value, and determine the second value as the target contrast ratio.

[0125] In some embodiments of this disclosure, the color temperature adjustment parameters include a color temperature compensation coefficient and a color temperature offset.

[0126] The information determination module 420 can also be specifically used to obtain the first color temperature value corresponding to the first ambient light; Calculate the product of the color temperature compensation coefficient and the first color temperature value to obtain the third value. Calculate the sum of the third value and the color temperature offset to obtain the second color temperature value. The second color temperature value is determined as the target color temperature value for adjusting the first ambient light.

[0127] In some embodiments of this disclosure, the brightness adjustment device 400 may further include a transient strong light event determination module.

[0128] The transient strong light event determination module can be used to obtain the vehicle's external image information after acquiring the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle. In the event that a transient glare event has occurred based on illuminance value, color temperature value and external image information, the first brightness value corresponding to the second display screen is obtained; A second brightness value is determined for adjusting the second display screen based on a first brightness value and a preset brightness adjustment rule. The second brightness value is lower than the first brightness value. The brightness of the second display screen is adjusted based on the second brightness value. If it is determined that there is a second ambient light in the same area as the second display screen and it is turned on, the color of the second ambient light is adjusted to the target color and the brightness value of the second ambient light is adjusted to the lowest brightness value corresponding to the second ambient light.

[0129] In some embodiments of this disclosure, the transient strong light event determination module can be specifically used to determine whether the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, and whether the second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold, based on the illuminance value and color temperature value, and to identify the external image information of the vehicle to determine whether there is an oncoming vehicle and whether the target vehicle is in the state of having its high beams on. A transient glare event is determined to have occurred if, based on illuminance and color temperature values, the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, the second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold, and based on external image information, it is determined that there is an oncoming vehicle with its high beams on.

[0130] In some embodiments of this disclosure, the brightness adjustment module 430 may be specifically used to obtain the current brightness value corresponding to the first display screen; A smoothing coefficient is determined based on the current brightness value. The target brightness value is then exponentially smoothed based on the smoothing coefficient to obtain the current output brightness value. The brightness of the first display screen is then adjusted based on the current output brightness value.

[0131] It should be noted that, Figure 4 The brightness adjustment device 400 shown can perform the various steps in the above method embodiments and achieve the various processes and effects in the above method embodiments, which will not be elaborated here.

[0132] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure.

[0133] In this embodiment of the disclosure, Figure 5 The electronic device shown can be a server or a terminal. Specifically, the terminal includes in-vehicle terminals, computers, or tablets, etc., without limitation.

[0134] like Figure 5 As shown, the electronic device may include a processor 510 and a memory 520 storing computer program instructions.

[0135] Specifically, the processor 510 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this disclosure.

[0136] Memory 520 may include a large-capacity storage device for information or instructions. For example, and not limitingly, memory 520 may include a hard disk drive (HDD), a floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 520 may include removable or non-removable (or fixed) media. Where appropriate, memory 520 may be internal or external to the integrated gateway device. In a particular embodiment, memory 520 is a non-volatile solid-state memory. In a particular embodiment, memory 520 includes read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (Electrically Programmable ROM, EPROM), an electrically erasable programmable PROM (EEPROM), an electrically alterable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0137] The processor 510 reads and executes computer program instructions stored in the memory 520 to perform the steps of the brightness adjustment method provided in the embodiments of this disclosure.

[0138] In one example, the electronic device may also include a transceiver 530 and a bus 540. Wherein, as... Figure 5 As shown, the processor 510, memory 520 and transceiver 530 are connected via bus 540 and communicate with each other.

[0139] Bus 540 may include hardware, software, or both. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industrial Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a MicroChannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 540 may include one or more buses.

[0140] This disclosure also provides a computer-readable storage medium that can store a computer program that, when executed by a processor, enables the processor to implement the brightness adjustment method provided in this disclosure.

[0141] When the computer program is executed by the processor, the processor can perform the following steps: obtain the illuminance value and color temperature value corresponding to the current ambient light of the vehicle; determine the basic brightness coefficient, contrast coefficient, and color temperature adjustment parameters based on the illuminance value and color temperature value; determine the target brightness value and target contrast value corresponding to the first display screen based on the basic brightness coefficient and contrast coefficient, and determine the target color temperature value corresponding to the first ambient light based on the color temperature adjustment parameters, wherein the first ambient light is an ambient light located in the same area as the first display screen and is in the on state; adjust the display effect of the first display screen based on the target brightness value and target contrast value, and adjust the first ambient light based on the target color temperature value.

[0142] This allows the acquisition of the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle. Based on the illuminance and color temperature values, the target brightness and target contrast values ​​for the first display screen, as well as the target color temperature value for the first ambient light (located in the same area as the first display screen and turned on), are determined. The display effect of the first display screen is adjusted based on the target brightness and target contrast values, and the first ambient light is adjusted based on the target color temperature value. Thus, by determining the color temperature value, ambient light with the same illuminance but drastically different spectral compositions can be distinguished. By combining the illuminance and color temperature values, a basic brightness coefficient and contrast coefficient are determined, thereby adjusting the brightness and contrast of the first display screen. This allows the white point of the first display screen to dynamically match the color and intensity of the ambient light, eliminating the color temperature difference between the first display screen and the background, reducing visual conflict and fatigue. Using the color temperature value to adjust the contrast allows for adaptive text readability and image softness under different lighting conditions, maintaining consistency in color perception. Meanwhile, during the adjustment of the first display screen based on illuminance and color temperature values, the color temperature of the ambient light is adjusted. This brings the ambient light's color temperature closer to the white point of the first display screen, eliminating abrupt color temperature changes at the screen edges and creating a smooth transition between the screen and background. This eliminates the visual disjointedness caused by the color temperature difference between the display and the environment. Simultaneously, adjusting both the brightness and contrast of the display screen prevents glare and blinding effects when the ambient light brightens, keeping the screen in its optimal viewing position. Furthermore, adjusting the ambient light in the same area as the display screen during the adjustment process achieves synchronized control between the display and the ambient light, ensuring visual consistency between the display and the background. This improves user visual comfort and color perception when ambient light changes, providing a stable and comfortable visual experience in various complex lighting environments.

[0143] In some embodiments of this disclosure, obtaining the illuminance value and color temperature value corresponding to the current ambient light of the vehicle includes: acquiring the illuminance value corresponding to the current ambient light and the response signal value corresponding to each color channel based on a target sensor, wherein the target sensor is a sensor corresponding to the first display screen; performing a linear transformation on the response signal value based on a preset transformation matrix to obtain the tristimulus value corresponding to the current ambient light, wherein the preset transformation matrix is ​​a matrix used to map the response signal value of the color channel to the tristimulus value of the standard colorimetric system, and the tristimulus value includes a red stimulus value for characterizing the intensity of the red component in the color, a green stimulus value for characterizing the intensity of the green component in the color, and a blue stimulus value for characterizing the intensity of the blue component in the color; and determining the color temperature value based on the tristimulus value.

[0144] In some embodiments of this disclosure, determining the color temperature value based on tristimulus values ​​includes: calculating the chromaticity coordinates corresponding to the current ambient light based on the tristimulus values; and determining the color temperature value based on the chromaticity coordinates.

[0145] In some embodiments of this disclosure, before determining the target brightness value and target contrast corresponding to the first display screen based on the base brightness coefficient and contrast coefficient respectively, the brightness adjustment method further includes: obtaining the current brightness value and current contrast corresponding to the first display screen; The target brightness value and target contrast ratio of the first display screen are determined based on the base brightness coefficient and contrast ratio, respectively, including: determining the base brightness coefficient and contrast ratio based on the illuminance value and color temperature value; calculating the product of the current brightness value and the base brightness coefficient to obtain a first value, and determining the first value as the target brightness value; calculating the product of the current contrast ratio and the contrast ratio to obtain a second value, and determining the second value as the target contrast ratio.

[0146] In some embodiments of this disclosure, the color temperature adjustment parameters include a color temperature compensation coefficient and a color temperature offset.

[0147] Determining the target color temperature value corresponding to the first ambient light based on color temperature adjustment parameters includes: determining the color temperature compensation coefficient and color temperature offset based on the illuminance value and color temperature value, and obtaining the first color temperature value corresponding to the first ambient light; calculating the product of the color temperature compensation coefficient and the first color temperature value to obtain a third value, calculating the sum of the third value and the color temperature offset to obtain a second color temperature value; and determining the second color temperature value as the target color temperature value for adjusting the first ambient light.

[0148] In some embodiments of this disclosure, after obtaining the illuminance value and color temperature value corresponding to the current ambient light of the vehicle, the brightness adjustment method further includes: obtaining the vehicle's exterior image information; if a transient strong light event is determined to have occurred based on the illuminance value, color temperature value, and exterior image information, obtaining a first brightness value corresponding to the second display screen; determining a second brightness value for adjusting the second display screen based on the first brightness value and a preset brightness adjustment rule, wherein the second brightness value is lower than the first brightness value; adjusting the brightness of the second display screen based on the second brightness value, and if it is determined that a second ambient light exists in the same area as the second display screen and is in an on state, adjusting the color of the second ambient light to the target color and adjusting the brightness value of the second ambient light to the lowest brightness value corresponding to the second ambient light.

[0149] In some embodiments of this disclosure, determining whether a transient glare event has occurred based on illuminance values, color temperature values, and external image information includes: determining whether a first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, and whether a second change in the color temperature value of the current ambient light within a preset time period is greater than a second threshold, and identifying the external image information to determine whether there is an oncoming vehicle and whether the oncoming vehicle is in a state where its high beams are on; if, based on illuminance values ​​and color temperature values, the first change in the illuminance value of the current ambient light within a preset time period is greater than the first threshold, the second change in the color temperature value of the current ambient light within a preset time period is greater than the second threshold, and based on external image information, the presence of an oncoming vehicle is determined and the oncoming vehicle is in a state where its high beams are on, then a transient glare event is determined to have occurred.

[0150] In some embodiments of this disclosure, adjusting the brightness of the first display screen based on a target brightness value includes: obtaining the current brightness value corresponding to the first display screen; determining a smoothing coefficient based on the current brightness value; performing exponential smoothing on the target brightness value based on the smoothing coefficient to obtain a current output brightness value; and adjusting the brightness of the first display screen based on the current output brightness value.

[0151] The aforementioned storage medium may, for example, include a memory 520 containing computer program instructions, which can be executed by a processor 510 of an electronic device to perform the brightness adjustment method provided in this embodiment. Optionally, the storage medium may be a non-transitory computer-readable storage medium, such as read-only memory (ROM), random access memory (RAM), external cache memory, compact disc ROM (CD-ROM), magnetic tape, floppy disk, flash memory, and optical data storage devices. By way of illustration and not limitation, RAM is available in various forms, such as static random access memory (SRAM) and dynamic random access memory (DRAM).

[0152] This disclosure also provides a vehicle that includes electronic devices that can implement the various processes and effects described in the above embodiments of this disclosure, which will not be elaborated here.

[0153] This disclosure also provides a computer program product, which includes a computer program or instructions. When the computer program or instructions are executed by a processor, they implement the brightness adjustment method provided in this disclosure and can achieve the various processes and effects in the above embodiments of this disclosure, which will not be elaborated here.

[0154] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A brightness adjustment method, characterized in that, The method includes: Obtain the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle; Based on the illuminance value and the color temperature value, a basic brightness coefficient, a contrast coefficient, and a color temperature adjustment parameter are determined; based on the basic brightness coefficient and the contrast coefficient, a target brightness value and a target contrast value corresponding to the first display screen are determined respectively; based on the color temperature adjustment parameter, a target color temperature value corresponding to the first ambient light is determined; the first ambient light is an ambient light that is in the same area as the first display screen and is in the on state. The display effect of the first display screen is adjusted based on the target brightness value and the target contrast ratio, and the first ambient light is adjusted based on the target color temperature value.

2. The method according to claim 1, characterized in that, The acquisition of the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle includes: Based on the target sensor, the illuminance value corresponding to the current ambient light and the response signal value corresponding to each color channel are collected. The target sensor is the sensor corresponding to the first display screen. The response signal value is linearly transformed based on a preset transformation matrix to obtain the tristimulus value corresponding to the current ambient light. The preset transformation matrix is ​​a matrix used to map the response signal value of the color channel to the tristimulus value of the standard colorimetric system. The tristimulus value includes a red stimulus value for characterizing the intensity of the red component in the color, a green stimulus value for characterizing the intensity of the green component in the color, and a blue stimulus value for characterizing the intensity of the blue component in the color. The color temperature value is determined based on the tristimulus values.

3. The method according to claim 2, characterized in that, Determining the color temperature value based on the tristimulus values ​​includes: Calculate the chromaticity coordinates of the current ambient light based on the tristimulus values; The color temperature value is determined based on the chromaticity coordinates.

4. The method according to claim 1, characterized in that, Before determining the target brightness value and target contrast value corresponding to the first display screen based on the base brightness coefficient and the contrast coefficient, the method further includes: Obtain the current brightness and current contrast of the first display screen; The step of determining the target brightness value and target contrast value corresponding to the first display screen based on the base brightness coefficient and the contrast coefficient respectively includes: Calculate the product of the current brightness value and the base brightness coefficient to obtain a first value, and determine the first value as the target brightness value; Calculate the product of the current contrast ratio and the contrast coefficient to obtain a second value, and determine the second value as the target contrast ratio.

5. The method according to claim 1, characterized in that, The color temperature adjustment parameters include the color temperature compensation coefficient and the color temperature offset. Determining the target color temperature value corresponding to the first ambient light based on the color temperature adjustment parameters includes: Obtain the first color temperature value corresponding to the first ambient light; Calculate the product of the color temperature compensation coefficient and the first color temperature value to obtain a third value; calculate the sum of the third value and the color temperature offset to obtain a second color temperature value. The second color temperature value is determined as the target color temperature value for adjusting the first ambient light.

6. The method according to claim 1, characterized in that, After obtaining the illuminance and color temperature values ​​corresponding to the current ambient light of the vehicle, the method further includes: Obtain the exterior image information of the vehicle; If a transient glare event is determined to have occurred based on the illuminance value, the color temperature value, and the external image information, the first brightness value corresponding to the second display screen is obtained. A second brightness value is determined based on the first brightness value and a preset brightness adjustment rule, wherein the second brightness value is lower than the first brightness value; The brightness of the second display screen is adjusted based on the second brightness value. If it is determined that there is a second ambient light in the same area as the second display screen and it is turned on, the color of the second ambient light is adjusted to the target color and the brightness value of the second ambient light is adjusted to the lowest brightness value corresponding to the second ambient light.

7. The method according to claim 6, characterized in that, Determining whether a transient glare event has occurred based on the illuminance value, the color temperature value, and the exterior image information includes: Based on the illuminance value and the color temperature value, determine whether the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, whether the second change in the color temperature value of the current ambient light within the preset time period is greater than a second threshold, and identify the exterior image information to determine whether there is an oncoming vehicle and whether the target vehicle is in the state of having its high beams on. If, based on the illuminance value and the color temperature value, it is determined that the first change in the illuminance value of the current ambient light within a preset time period is greater than a first threshold, and the second change in the color temperature value of the current ambient light within the preset time period is greater than a second threshold, and based on the external image information, it is determined that there is an oncoming vehicle and the oncoming vehicle is in a high-beam state, then a transient glare event is determined to have occurred.

8. The method according to claim 1, characterized in that, Adjusting the brightness of the first display screen based on the target brightness value includes: Obtain the current brightness value corresponding to the first display screen; A smoothing coefficient is determined based on the current brightness value. The target brightness value is then subjected to exponential smoothing based on the smoothing coefficient to obtain the current output brightness value. The brightness of the first display screen is then adjusted based on the current output brightness value.

9. An electronic device, characterized in that, include: processor; Memory, used to store executable instructions; The processor is configured to read the executable instructions from the memory and execute the executable instructions to implement the brightness adjustment method according to any one of claims 1-8.

10. A vehicle, characterized in that, Including the electronic device as described in claim 9.

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