Screen brightness adjustment methods, devices, display equipment and storage media

Abstract

This application relates to the field of display technology, specifically to a screen brightness adjustment method, apparatus, display device, and storage medium. The screen brightness adjustment method, applied to a display device, includes: acquiring first reflective brightness data of the display device in its current environment; determining the current environment type of the display device based on the first reflective brightness data; when the current environment type is a darkroom environment, adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to a first brightness weighting coefficient; when the current environment type is a non-darkroom environment, adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to a second brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data, thereby considering the reflective brightness of the environment when adjusting the screen brightness.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a screen brightness adjustment method, apparatus, display device, and storage medium. Background Technology

[0002] With the development of video technology, LCD monitors with multi-zone backlight driving systems are becoming increasingly popular in the market to improve display effects. When improving the display effect of multi-zone backlight driving LCD monitors, the impact of backlight power consumption is also considered. For example, a brightness adjustment algorithm is integrated into the internal chip of the LCD monitor. This algorithm adjusts the received backlight data based on the backlight data received by the LCD monitor and the data when the backlight is fully on. The monitor driver chip then illuminates the backlight zones of the monitor according to the adjusted backlight data.

[0003] In implementing the embodiments of this application, the inventors discovered that when viewing a monitor in a dark environment, where the ambient light is dim, if the monitor screen is at its peak brightness, a strong contrast between the screen and the dim environment can easily damage the eyes. Therefore, how to adjust the screen's peak brightness by taking into account the reflected brightness of the environment is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a screen brightness adjustment method, apparatus, display device, and storage medium, which can solve the technical problem of how to adjust screen brightness by taking into account the ambient reflective brightness.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a screen brightness adjustment method, applied to a display device, the screen brightness adjustment method comprising: acquiring first reflective brightness data of the display device in the current environment; determining the current environment type of the display device based on the first reflective brightness data, the environment type including a darkroom environment and a non-darkroom environment; when the current environment type of the display device is a darkroom environment, adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to a first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data; wherein, the first reflective brightness data is used to determine the current environment type of the display device. The brightness weighting coefficient is the ratio of the minimum screen brightness data of the display device to the maximum peak screen brightness data of the display device. When the current environment of the display device is a non-dark room environment, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to the second brightness weighting coefficient to obtain the target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data. The second brightness weighting coefficient is the ratio of the target peak screen brightness data of the display device to the maximum peak screen brightness data of the display device. The target peak screen brightness data is the product of the peak screen brightness ratio of the display device and the first reflected brightness data.

[0006] Optionally, adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to the first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data, includes: obtaining the initial backlight brightness data corresponding to the current display screen on the display device; calculating the product of the initial backlight brightness data and the first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data.

[0007] Optionally, adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to the second brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data, includes: obtaining the initial backlight brightness data corresponding to the current display screen on the display device; obtaining the screen peak brightness ratio of the display device according to the first reflective brightness data; calculating the product of the screen peak brightness ratio and the first reflective brightness data to obtain the target screen peak brightness data of the display device; calculating the ratio between the target screen peak brightness data and the maximum screen peak brightness data of the display device as the second brightness weighting coefficient; and calculating the product of the initial backlight brightness data and the second brightness weighting coefficient to obtain the target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data.

[0008] Optionally, obtaining the initial backlight brightness data corresponding to the current display screen on the display device includes: calculating first backlight brightness data corresponding to the current display screen based on the pixel brightness characteristics of the current display screen on the display device, wherein the first backlight brightness data includes at least one backlight brightness value; obtaining backlight brightness adjustment parameters for the current display screen based on the first backlight brightness data; adjusting the backlight brightness values ​​in the first backlight brightness data that are less than the average brightness value of the current display screen according to the backlight brightness adjustment parameters to obtain second backlight brightness data; and adjusting the second backlight brightness data according to the limiting parameters of the display device under different brightness levels to obtain the initial backlight brightness data corresponding to the current display screen.

[0009] Alternatively, the first backlight brightness data corresponding to the current display screen is calculated based on the pixel brightness characteristics of the current display screen on the display device. The first backlight brightness data includes at least one backlight brightness value. All backlight brightness values ​​in the first backlight brightness data are summarized to calculate the first backlight data sum. The ratio between the first backlight data sum and the maximum backlight data sum corresponding to the display device when the backlight is fully lit is calculated. A limiting factor corresponding to the ratio value is obtained based on the limiting parameters of the display device under different brightness levels. The first backlight brightness data is adjusted according to the limiting factor to obtain the initial backlight brightness data corresponding to the current display screen.

[0010] Optionally, obtaining the backlight brightness adjustment parameters of the current display screen based on the first backlight brightness data includes: summing all backlight brightness values ​​in the first backlight brightness data to calculate the first backlight data sum of the first backlight brightness data; and calculating a first ratio between the first backlight data sum and the maximum backlight data sum corresponding to when the backlight of the display device is fully lit as the backlight brightness adjustment parameters of the current display screen.

[0011] Optionally, adjusting the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen according to the backlight brightness adjustment parameter to obtain the second backlight brightness data includes: comparing the first ratio value with a preset first threshold and a second threshold respectively, wherein the first threshold is greater than the second threshold; when the first ratio value is greater than the first threshold, multiplying the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen by a preset first coefficient to obtain the second backlight brightness data; when the first ratio value is less than or equal to the first threshold and greater than the second threshold, multiplying the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen by a preset second coefficient to obtain the second backlight brightness data.

[0012] Optionally, adjusting the second backlight brightness data according to the limiting parameters of the display device under different brightness levels to obtain the initial backlight brightness data corresponding to the current display screen includes: calculating the second backlight data sum corresponding to the second backlight brightness data; calculating a second ratio between the second backlight data sum and the maximum backlight data sum corresponding to the display device when the backlight is fully lit; obtaining a limiting factor corresponding to the second ratio value according to the limiting parameters of the display device under different brightness levels; adjusting the second backlight brightness data according to the limiting factor to obtain the adjusted second backlight brightness data as the initial backlight brightness data corresponding to the current display screen.

[0013] Optionally, obtaining the first reflected brightness data of the display device in the current environment includes: obtaining the illuminance value of the ambient light received by the display device in the current environment; and calculating the first reflected brightness data of the display device in the current environment based on the illuminance value.

[0014] Optionally, determining the current environment type of the display device based on the first reflectance brightness data includes: comparing the first reflectance brightness data with a preset second reflectance brightness data, wherein the second reflectance brightness data is a critical value for distinguishing between a darkroom environment and a non-darkroom environment; when the first reflectance brightness data is less than the preset second reflectance brightness data, determining that the current environment type of the display device is a darkroom environment; when the first reflectance brightness data is greater than or equal to the preset second reflectance brightness data, determining that the current environment type of the display device is a non-darkroom environment.

[0015] Optionally, the screen peak brightness ratio is used to reflect the human eye's ability to perceive the brightness difference between the screen peak brightness data of the display device and the first reflected brightness data of the display device in the current environment.

[0016] To solve the above-mentioned technical problems, another technical solution adopted in this application is: providing a screen brightness adjustment device, applied to a display device, the screen brightness adjustment device comprising: a reflectance brightness acquisition module, used to acquire first reflectance brightness data of the display device in the current environment; an environment detection module, used to determine the current environment type of the display device based on the first reflectance brightness data, the environment type including a darkroom environment and a non-darkroom environment; and a first screen brightness adjustment module, used to adjust the initial backlight brightness data corresponding to the current display screen on the display device according to a first brightness weighting coefficient when the current environment type of the display device is a darkroom environment, to obtain target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data. The adjustment is as follows: The first brightness weighting coefficient is the ratio of the minimum screen brightness data of the display device to the maximum screen peak brightness data of the display device; the second screen brightness adjustment module is used to adjust the initial backlight brightness data corresponding to the current display screen on the display device according to the second brightness weighting coefficient when the current environment type of the display device is a non-dark room environment, to obtain target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data; wherein the second brightness weighting coefficient is the ratio of the target screen peak brightness data of the display device to the maximum screen peak brightness data of the display device; the target screen peak brightness data is the product of the screen peak brightness ratio of the display device and the first reflective brightness data.

[0017] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of this application is: to provide a display device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method as described above.

[0018] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of this application is: to provide a computer storage medium that stores instructions or programs, which, when executed by a display device, cause the display device to perform the method described above.

[0019] Unlike related technologies, this application provides a screen brightness adjustment method, apparatus, display device, and storage medium. The screen brightness adjustment method is applied to a display device. This method acquires first reflected brightness data of the display device in its current environment; determines the current environment type based on the first reflected brightness data, which is divided into a darkroom environment and a non-darkroom environment; when the current environment type is a darkroom environment, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to a first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data; the first brightness weighting coefficient is the ratio of the display device's lowest screen brightness data to its maximum screen peak brightness data, i.e., the first brightness weighting coefficient is directly proportional to the lowest screen brightness data and inversely proportional to the maximum screen peak brightness data. The first brightness weighting coefficient is affected by... Constrained by the minimum and maximum peak screen brightness data of the display device, the initial backlight brightness data of the current display image is adjusted using a first brightness weighting coefficient. This allows for an appropriate reduction in the current screen brightness in a dark room without making the screen too dark for the user to see clearly, avoiding strong contrast between light and dark and reducing user discomfort when viewing the display image in a dark environment. When the display device is in a non-dark room environment, the initial backlight brightness data corresponding to the current display image is adjusted according to a second brightness weighting coefficient to obtain target backlight brightness data. This allows the display device to adjust the current screen brightness based on the target backlight brightness data. The second brightness weighting coefficient is the ratio of the target peak screen brightness data to the maximum peak screen brightness data of the display device, and the target peak screen brightness data is the product of the peak screen brightness ratio and the first reflection brightness data.The second brightness weighting coefficient is positively correlated with the ratio of the display device's peak brightness to the current first reflected brightness data, and negatively correlated with the display device's maximum peak brightness data. When ambient reflected light becomes increasingly intense, the combined strong light from the ambient light and the screen display light can easily cause eye fatigue and dizziness. In this case, the second brightness weighting coefficient is adjusted not only according to the ambient light (first reflected brightness data) but also simultaneously according to the display device's peak brightness ratio. The peak brightness ratio is related to the display device's screen light. Therefore, the second brightness weighting coefficient is constrained by three parameters: the peak brightness ratio, the first reflected brightness data, and the maximum peak brightness. This helps to mitigate the discomfort caused by the combined strong light from the ambient light and the screen display light. Furthermore, the product of the peak brightness ratio and the first reflected brightness data is the target peak brightness data. This target peak brightness data characterizes the display device's brightness performance under different ambient light conditions, ensuring the contrast of the displayed image and preventing unclear image content when adjusting for brightness decay or dimming of the current display.

[0020] In summary, the embodiments provided in this application offer two dimming strategies for display devices in darkroom and non-darkroom environments. In a darkroom environment, the display device's screen brightness is set by considering its minimum and maximum peak brightness data. In a non-darkroom environment, the display device's screen brightness is set by considering the ambient light, the ratio of peak brightness to maximum peak brightness, and the maximum peak brightness data. These two dimming strategies can adaptively adjust the screen brightness, keeping the screen display brightness and ambient reflection brightness within a comfortable viewing range for the human eye. This avoids strong contrasts between light and dark areas, protecting the eyes while providing a better visual viewing experience. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0022] Figure 1 This is a schematic diagram of the peak algorithm brightness curve provided in the embodiments of this application;

[0023] Figure 2 These are schematic diagrams of white window images at different scales provided in the embodiments of this application;

[0024] Figure 3 This is a schematic diagram of the measured peak brightness curves of white window images with different proportions provided in the embodiments of this application;

[0025] Figure 4 This is a schematic flowchart of the screen brightness adjustment method provided in the embodiments of this application;

[0026] Figure 5 This is a flowchart illustrating a method for obtaining first reflectance brightness data of a display device in the current environment, as provided in an embodiment of this application.

[0027] Figure 6 This is a flowchart illustrating a method for determining the current environment type of a display device based on first reflectance brightness data, as provided in an embodiment of this application.

[0028] Figure 7 This is a schematic diagram of the curves showing the screen peak brightness ratio that makes the human eye comfortable when the display device displays only a pure white image under different reflective brightness levels, according to embodiments of this application.

[0029] Figure 8 This is a flowchart illustrating a method provided in this application for adjusting the initial backlight brightness data corresponding to the current display screen on the display device based on a first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data.

[0030] Figure 9 This is a flowchart illustrating a method provided in this application for adjusting the initial backlight brightness data corresponding to the current display screen on the display device based on a second brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data.

[0031] Figure 10 This is a flowchart illustrating a method for obtaining initial backlight brightness data corresponding to the current display screen on a display device, according to an embodiment of this application.

[0032] Figure 11 This is a flowchart illustrating a method for obtaining initial backlight brightness data corresponding to the current display screen on a display device, provided in another embodiment of this application.

[0033] Figure 12 This is a schematic diagram of a display screen on a display device provided in an embodiment of this application;

[0034] Figure 13 This is a schematic diagram of the initial backlight brightness data corresponding to a portion of the display screen on the display device provided in the embodiments of this application;

[0035] Figure 14 This is a schematic diagram of the structure of a screen brightness adjustment device provided in an embodiment of this application;

[0036] Figure 15 This application provides a schematic diagram of the hardware structure of a display device for performing a screen brightness adjustment method. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0038] The technical features involved in the various embodiments of this application described below do not conflict with each other and can be combined with each other.

[0039] Although the functional modules are divided in the device schematic diagram and the logical sequence is shown in the flowchart, in some cases, the steps may be performed in a different order than those shown in the flowchart.

[0040] When an element is described as "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements between them.

[0041] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0042] Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0043] This application analyzes the prior art as follows:

[0044] In the prior art, display devices have liquid crystal displays, which may have multiple arrays of pixels, each of which can emit light by relying on the light from a backlight module within the liquid crystal display.

[0045] Typically, an internal chip in an LCD monitor integrates a brightness adjustment algorithm. This algorithm adjusts the received backlight data based on the backlight data received by the LCD monitor and the data when the backlight is fully on. The LCD monitor driver chip then illuminates the backlight zones of the LCD monitor according to the adjusted backlight data. The backlight zones of an LCD monitor divide the screen into several equal sections along its width and length.

[0046] Image partitioning can be based on the backlight partitions of the LCD screen. For example, if the screen is divided into several backlight partitions along its length, the image can be divided into the same number of image partitions along its length. Similarly, if the screen is divided into several backlight partitions along its width, the image can be divided into the same number of image partitions along its width. If the screen is divided into M*N backlight partitions, the corresponding image can be divided into M*N image partitions, and so on. The following examples illustrate this using the division of the screen into M*N backlight partitions and the image into M*N image partitions.

[0047] The M and N mentioned above can be positive integers. For example, if M is 20 and N is 24, the image is divided into 20*24 image partitions, totaling 480 partitions.

[0048] There is a one-to-one correspondence between image partitions and backlight partitions. Image partitions and backlight partitions at the same position have a corresponding relationship. For example, the image partition at the third column of the first row has a corresponding relationship with the backlight partition at the third column of the first row.

[0049] In one example, the LCD display could be a display with 480 backlight zones. This type of display uses zone control technology, dividing the backlight into 480 independent areas, each with independently adjustable brightness. It can specifically adjust the brightness and color of each area based on the brightness and color variations of the image to achieve higher contrast and more accurate color reproduction. The LCD display can control the brightness of the corresponding backlight zones in the backlight module by receiving 480 backlight data points sent from a host computer. To account for power consumption limitations, the internal chip of the LCD display can integrate... Figure 1 The peak brightness algorithm curve shown demonstrates how adjusting the brightness of backlight zones using this algorithm can maximize display brightness and contrast while meeting the power consumption limitations of the display hardware. The peak brightness algorithm can be used to evaluate the brightness performance of the LCD backlight module, resulting in better visual effects and richer details in the image.

[0050] Specifically, the internal chip of the LCD monitor calculates the sum of the current backlight data corresponding to the 480 backlight data points received, and calculates the maximum sum of the backlight data corresponding to the 480 backlight data points when the backlight is fully on. Then, according to... Figure 1 As shown, the range of the current backlight data sum corresponding to the 480 backlight data points can be determined to include the first range: (0, 0.21 * the maximum backlight data sum when the backlight is fully lit), the second range: (0.21 * the maximum backlight data sum when the backlight is fully lit, 0.4 * the maximum backlight data sum when the backlight is fully lit), and the third range: (0.4 * the maximum backlight data sum when the backlight is fully lit, 1 * the maximum backlight data sum when the backlight is fully lit). When the sum of the current backlight data corresponding to the 480 backlight data points is within the first interval mentioned above (i.e., the sum of the current backlight data points < 0.21 * the maximum sum of backlight data points when the backlight is fully on), the internal chip of the LCD monitor will multiply the received 480 backlight data points by 1 and send them to the backend display driver chip to illuminate the backlight zones of the display. When the sum of the current backlight data corresponding to the 480 backlight data points is within the second interval mentioned above (i.e., 0.21 * the maximum sum of backlight data points when the backlight is fully on < the sum of the current backlight data points corresponding to the 480 backlight data points < 0.4 * the maximum sum of backlight data points when the backlight is fully on), the internal chip of the LCD monitor will proceed according to the following... Figure 1 The curve shown has a slope of -2.105. It processes the 480 backlight data points received and sends them to the back-end display driver chip to illuminate the backlight zones of the display. When the sum of the current backlight data corresponding to the 480 backlight data points is within the third interval mentioned above, that is, when the sum of the current backlight data corresponding to the 480 backlight data points is greater than 0.4 * the maximum sum of backlight data when the backlight is fully lit, the internal chip of the LCD will multiply the received 480 backlight data points by 0.6 and send them to the back-end display driver chip to illuminate the backlight zones of the display.

[0051] The sum of the current backlight data corresponding to the 480 backlight data points refers to the summation of the 480 backlight brightness values ​​across 480 zones of the LCD display. The maximum sum of backlight data when all 480 backlight data points are fully illuminated refers to the sum of the maximum backlight brightness values ​​of each of the 480 zones. This is the product of the number of zones and the maximum backlight brightness value (e.g., 255) (e.g., 480 * 255). In the backlight zone control of the LCD display, the backlight brightness of each zone can be controlled using PWM (Pulse Width Modulation) technology. This involves controlling the average voltage or average current of the output signal by adjusting the duty cycle (the ratio of high-level time to period) of a square wave signal with a fixed frequency, thereby adjusting the brightness. It's important to note that in an 8-bit binary system, the largest value is 255 (11111111), meaning an 8-bit PWM signal can represent a brightness value between 0 and 255. Therefore, when the backlight brightness of a backlight zone is set to full brightness, the duty cycle of the PWM signal for each zone is set to 100%, meaning the high-level duration of the PWM signal is the entire cycle time, corresponding to a brightness value of 255. This brightness value of 255 represents the maximum brightness value for a single backlight zone. Furthermore, it should be noted that in practical LCD displays, the number of backlight zones, the range of brightness adjustments, and the precision of brightness adjustment may vary depending on the type and brand of the display.

[0052] Among them, the above-mentioned basis is as follows Figure 1 The coefficients 0.21 and 0.4 set within the defined range are constants determined experimentally and empirically. These constants are used to calculate the peak brightness value of the LCD display in different screen displays, which is limited by the brightness ratio of the current displayed screen and power consumption constraints. These constants were determined experimentally and empirically. For example, they can be derived by considering factors such as the human eye's brightness perception curve, the optical and electrical properties of the LCD display, etc. It should be noted that in practical applications, these constants may vary depending on the type of display, brand, and application scenario, and need to be adjusted and optimized according to specific circumstances. Figure 1The horizontal axis represents the constant, specifically the ratio of the initial total backlight brightness data of the current display to the maximum total backlight brightness data when the display is fully backlit. In other words, the horizontal axis represents the brightness ratio of the current display. The vertical axis represents the power consumption limit factor corresponding to each brightness ratio, such as 0.6 and 1. 0.6 and 1 are constants determined experimentally and empirically. By multiplying the detected backlight brightness data of the current display by the power consumption limit factor on the vertical axis, the backlight brightness of the current display is adjusted so that the display brightness does not exceed the power consumption limit of the display device itself. This applies to both zoned and non-zoned displays. Figure 1 The corresponding horizontal axis represents the ratio of the initial total backlight brightness data of the currently displayed screen to the maximum total backlight brightness data when the screen is fully lit. For a local dimming monitor, the initial total backlight brightness data is the sum of the backlight brightness values ​​of all zones, and the maximum total backlight brightness data when fully lit is the number of zones multiplied by 255. For a non-local dimming monitor, the initial total backlight brightness data can be the current backlight brightness value, and the maximum total backlight brightness data when fully lit can be 255.

[0053] In implementing the embodiments of this application, the inventors discovered that when viewing a display device in a dark environment, where the ambient light is dim, if the display device screen is at its peak brightness, a strong contrast between the bright and dark areas will occur, potentially causing eye strain. Furthermore, if the user manually adjusts the display device screen to low brightness in a dim environment, the brightness needs to be readjusted when switching from a dim to a bright environment. Existing screen brightness adjustment methods are generally divided into two categories: backlight adjustment and liquid crystal pixel compensation adjustment. While backlight adjustment is more difficult to implement, it is more precise, offering higher accuracy and better results compared to liquid crystal pixel compensation adjustment. The principle of a typical backlight adjustment scheme is to adjust the duty cycle by regulating the current, thereby controlling the backlight brightness so that the adjusted backlight brightness maps to the target screen display brightness. However, existing backlight adjustment schemes only consider the brightness contrast of the current display, ambient reflection brightness, or a combination of both, and do not provide a brightness adjustment scheme suitable for adaptive switching between bright and dark environments.

[0054] Therefore, the inventors conceived of using ambient light and the peak brightness of the display device under different ambient light conditions to formulate a brightness adjustment scheme for the backlight module. In order to explore the acceptable range of the peak brightness of the display device, the inventors conducted the following experiment on a certain display device.

[0055] First, set different proportions of white window images within the preset pure black background display window. For example... Figure 2 As shown, this includes twenty pure black background display windows, each with the same total area. The proportions of white screens in these twenty windows are 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, and 100%, respectively. It should be noted that the pure black background display windows are used to simulate the display screen of a monitor, while the white screens in the experiment represent a pure white screen on the display device. The pure white screen is chosen as the current display screen so that, given a fixed backlight brightness, the screen brightness is closest to the lossless backlight brightness when mapping the backlight brightness to the screen brightness. In other words, the screen brightness is theoretically equal to the backlight brightness, and this screen brightness can be used as the peak brightness (i.e., the peak screen brightness) when the display device displays other content (not a pure white screen) under the same backlight brightness. Because a pure white display allows the monitor screen to reach its theoretical maximum brightness globally, meaning that a white window image can theoretically achieve the maximum screen brightness corresponding to that window image when the corresponding backlight is turned on.

[0056] In the inventor's experiment, the twenty white window images with different proportions were processed through the backlight extraction step of the LocalDimming algorithm to obtain an initial backlight brightness data matrix. This initial backlight brightness data matrix was then processed... Figure 1 The backlight data matrix obtained after processing the peak brightness algorithm curve shown is sent to the back-end LCD driver chip to illuminate the corresponding backlight zones. Then, a color analyzer is used to measure the brightness of the twenty white windows with different proportions, and the results are as follows: Figure 3 The measured peak brightness curve is shown. The color analyzer can be a CA-410 instrument or other suitable brightness acquisition device. Figure 3 The horizontal axis in the image represents the proportion of the white window. Figure 3 The vertical axis represents the brightness value achieved by the LCD display when showing a white window image at different scales, measured in nits.

[0057] from Figure 3The diagram shows the approximate acceptable range of the LCD screen's peak brightness, with a maximum peak brightness of 1315 nits, corresponding to a white window ratio of 40%. However, when viewing this display in a dark environment, a peak brightness of 1315 nits creates a strong contrast between the screen and the dark background, potentially reducing the user's viewing experience and causing eye strain. Therefore, the inventors further considered the need to simultaneously consider both the maximum and minimum peak brightness of the display under different ambient light conditions when developing a brightness adjustment scheme for the backlight module.

[0058] The inventors believe that the implementation method provided in this application can adaptively adjust the backlight data after processing the peak brightness algorithm curve, so that the peak brightness of the screen and the brightness reflected from the wall are always kept within a relatively comfortable viewing experience range, avoiding strong contrast between light and dark, protecting the eyes and providing users with a better viewing experience; at the same time, the implementation method provided in this application combines the maximum and minimum screen peak brightness, as well as the screen peak brightness of the display device under different ambient light conditions, which can enable the display device to adaptively switch the dimming strategy in bright and dark environments, further improving the user experience.

[0059] Therefore, the following embodiments provide a screen brightness adjustment method. The execution subject of the screen brightness adjustment method is generally an electronic device with a certain computing capability, such as a computer. In some possible implementations, the screen brightness adjustment method can be implemented by a processor calling computer-readable instructions stored in memory.

[0060] Please see Figure 4 , Figure 4 This is a schematic flowchart of the screen brightness adjustment method provided in the embodiments of this application.

[0061] This application provides a screen brightness adjustment method, applied to a display device, the screen brightness adjustment method comprising:

[0062] S1. Obtain the first reflectance brightness data of the display device in the current environment.

[0063] The first reflectance brightness data is used to reflect the magnitude of the reflectance brightness of the current environment in which the display device is located. In one implementation, specifically, an illuminance sensor can be placed in front of the screen of the display device to obtain the ambient light illuminance value of the current environment in which the display device is located, and this ambient light illuminance value is used as the first reflectance brightness data.

[0064] Please see Figure 5 , Figure 5 This is a flowchart illustrating a method for obtaining first reflectance brightness data of a display device in a current environment, as provided in an embodiment of this application. In some embodiments, S1, obtaining first reflectance brightness data of a display device in a current environment, includes:

[0065] S11. Obtain the illuminance value of the ambient light received by the display device in the current environment.

[0066] Specifically, instruments can be used to detect the incident luminous flux of the display device's screen in real time. The ratio of the incident luminous flux received by the screen in the current environment to the screen area can be used as the illuminance value.

[0067] S12. Calculate the first reflected brightness data of the display device in the current environment based on the illuminance value.

[0068] The product of the ambient light illuminance value and the reflectivity of the display device can be used as the first reflective brightness data.

[0069] The first reflection brightness data can also be calculated using the following formula:

[0070]

[0071] Where ρ is the background reflectivity of the environment in which the display device is located, typically ranging from 0.6 to 0.7. This range covers common placement scenarios for the display device, such as backgrounds like walls, bookshelves, and backdrops. Therefore, the range of background reflectivity for the display device under these common backgrounds is [0.6, 0.7]; E is the ambient light illuminance value collected by the illuminance sensor; L rf This is the first reflection brightness data, in nits.

[0072] S2. Determine the current environment type of the display device based on the first reflection brightness data.

[0073] In this embodiment, the environment types include darkroom environment and non-darkroom environment.

[0074] In a specific implementation, the first reflective brightness data can be compared with a preset second reflective brightness data to determine whether the environment in which the display device is currently located is a darkroom environment. The second reflective brightness data is a critical value for distinguishing between a darkroom environment and a non-darkroom environment. The second reflective brightness data serves as an indicator for defining whether the environment in which the display device is located is a darkroom environment.

[0075] The darkroom environment requires stable illumination under different external conditions. Internal light sources need to be turned off or isolated. The reflectivity of the walls and floor should refer to Nissan's darkroom standard, that is, the reflectivity of the walls is 60% and the reflectivity of the floor is 20%.

[0076] The second reflective brightness data can be determined by measuring the illuminance of the ambient light in the current environment in a dark room, with reference to the calculation method of the first reflective brightness data described above.

[0077] Please see Figure 6 , Figure 6 This is a flowchart illustrating a method for determining the current environment type of a display device based on first reflectance brightness data, as provided in an embodiment of this application.

[0078] In some embodiments, S2, determining the current environment type of the display device based on the first reflectance brightness data, may specifically include:

[0079] S21. Compare the first reflectance brightness data with the preset second reflectance brightness data. The second reflectance brightness data is the critical value for distinguishing between darkroom environments and non-darkroom environments.

[0080] It should be noted that the threshold value of the reflected brightness in the darkroom environment in this application embodiment, that is, the value of the second reflected brightness data, was obtained by the inventor through experimental testing in a darkroom environment.

[0081] S22. When the first reflection brightness data is less than the preset second reflection brightness data, the current environment type of the display device is determined to be a darkroom environment.

[0082] S23. When the first reflection brightness data is greater than or equal to the preset second reflection brightness data, the current environment type of the display device is determined to be a non-dark room environment.

[0083] Since the second reflectance luminance data is an indicator for determining whether the environment in which the display device is located is a darkroom environment, and the first reflectance luminance data is directly proportional to the ambient light illuminance value (i.e., the larger the first reflectance luminance data, the larger the ambient light illuminance value in which the display device is located), if the first reflectance luminance data is less than the second reflectance luminance data, the environment in which the display device is located is considered a darkroom environment; if the first reflectance luminance data is greater than or equal to the second reflectance luminance data, the environment in which the display device is located is considered not a darkroom environment. For example, if the preset second reflectance luminance data is 2 nits, and the calculated first reflectance luminance data is 1 nits, it means that the environment in which the display device is located is a darkroom environment; if the calculated first reflectance luminance data is 5 nits, it means that the environment in which the display device is located is not a darkroom environment. In this example, the second reflectance luminance data of 2 nits can be obtained through simulation experiments based on a pure darkroom environment.

[0084] S3. When the current environment of the display device is a dark room, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to the first brightness weighting coefficient to obtain the target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data.

[0085] The first brightness weighting coefficient is the ratio of the display device's minimum screen brightness data to the display device's maximum screen peak brightness data.

[0086] If the display device is currently in a dark room environment, it means that the reflected brightness of the user's environment is relatively low. In this case, in order to protect the user's eyes from damage and improve the user experience, the screen brightness of the display device needs to be set to be relatively low. The first brightness weighting coefficient is a coefficient less than 1. Based on this coefficient, the initial backlight brightness data corresponding to the current display screen can be adjusted. This can appropriately reduce the backlight brightness data corresponding to the current display screen, so that the backlight brightness data adjusted by this coefficient is transmitted to the backlight module to drive the backlight of the display device. This allows the display device to adjust the current screen brightness based on the target backlight brightness data, so that the current screen brightness can be adjusted to a target screen brightness that is suitable for dark room environments and comfortable for the human eye.

[0087] The minimum screen brightness data refers to the screen brightness that is comfortable for the human eye in a dark room environment, corresponding to the reflected brightness value. It should be noted that this minimum screen brightness data may vary depending on the model and brand of different display devices. For the same display device, the minimum screen brightness data may also have different values ​​depending on the display mode (such as reading mode, anti-blue light mode, night mode, etc.). This embodiment does not impose specific limitations on this.

[0088] In one example, to determine the relationship between different levels of reflected light and the screen brightness that is most comfortable for human eyes, experiments were conducted in a lightbox environment to obtain data on the screen brightness that is most comfortable for human eyes under different levels of reflected light. Curves were then plotted and fitted. Please refer to [link / reference]. Figure 7 , Figure 7 This is a schematic diagram showing the curves of the screen peak brightness ratio under different reflectance brightness levels provided in the embodiments of this application. Specifically, Figure 7 The curve shown is the ratio of peak screen brightness that is comfortable for the human eye when the display device displays only a pure white image under different reflective brightness levels. It is a curve drawn by the inventor based on the collected data after conducting experiments. Figure 7 The horizontal axis represents the value of reflectance, measured in nits. Figure 7The vertical axis represents the screen peak brightness ratio corresponding to the reflected brightness value. The screen peak brightness ratio is the ratio between the peak brightness of the currently displayed image on the display device and the reflected brightness of the background ambient light in the current environment (i.e., the first reflected brightness data). Since both the screen peak brightness and reflected brightness values ​​are in nits, the screen peak brightness ratio obtained by dividing them has no unit. It should be noted that... Figure 7 The relationship curves shown are derived from experimental tests and are for reference only. In practical applications, these curves may vary depending on the type, brand, and application scenario of the display device, and this application embodiment does not impose specific limitations on them.

[0089] like Figure 7 As shown, when the experimental environment is a simulated darkroom scene and the displayed image is pure white, that is, when the reflected brightness value in the darkroom environment is 2 nits, the peak brightness ratio of the display device is close to 10, which means the screen brightness is close to 20 nits. Therefore, the minimum screen brightness that is comfortable for the human eye in the darkroom environment corresponding to this display device is 20 nits. When the current display image of the display device is pure white, if it is higher than this minimum screen brightness, it will cause a strong contrast between light and dark to the human eye. It should be noted that in this example, a pure white image is chosen as the current display image of the display device so that when the backlight brightness is determined, the screen brightness is closest to the lossless backlight brightness when the backlight brightness is mapped to the screen brightness. That is, the screen brightness is theoretically equal to the backlight brightness, and the screen brightness at this time can be used as the peak brightness of the image (i.e., the peak screen brightness) when the display device displays other content (not a pure white image) under the same backlight brightness.

[0090] Specifically, in this example, the minimum screen brightness data can be set to the ideal screen brightness when the display device presents a pure white image in a dark room environment. Because there is a mapping relationship between screen brightness and backlight brightness, the maximum screen peak brightness corresponds to the maximum backlight brightness (when the display device shows a pure white image, the drive based on the maximum backlight brightness can make the screen reach the maximum screen peak brightness). That is, the ratio between the ideal screen brightness (i.e., the minimum screen brightness data) in the dark room environment and the backlight brightness data matched by the minimum screen brightness data is equivalent to the ratio between the maximum screen peak brightness data and the maximum backlight brightness data matched by the maximum screen peak brightness. Based on this equivalent mapping relationship, in order for the current pure white display image to reach the ideal screen brightness in the dark room, the backlight brightness data matched by the minimum screen brightness data should be the product of the ratio between the minimum screen brightness data and the maximum screen peak brightness and the maximum backlight brightness data matched by the maximum screen peak brightness. However, in the current... In practical applications, the display screen presented by the display device in a dark room environment is not a pure white screen (that is, even if the backlight brightness reaches the maximum backlight brightness data, it cannot reach the maximum screen peak brightness). Therefore, in practical applications, it is necessary to obtain the actual backlight brightness corresponding to the current display screen in real time, that is, to obtain the initial backlight brightness data corresponding to the current display screen, and then multiply the [ratio of the minimum screen brightness data to the maximum screen peak brightness data] with the initial backlight brightness data. That is, the first brightness weighting coefficient is used to adjust the initial backlight brightness data. The effect of the first brightness weighting coefficient on the initial backlight brightness data is essentially the effect of the ambient reflected light in the dark room environment on the initial backlight brightness data. If the target backlight brightness data obtained by multiplying the two can be used as the more suitable backlight brightness for the current display screen in the dark room environment, that is, the target backlight brightness data is passed to the backlight module of the display device, which can drive the backlight module to light up and the display brightness mapped to the display screen can reach the target screen brightness adapted to the dark room environment.

[0091] In another example, a screen brightness slightly higher than the minimum screen brightness data can be set, such as 30 nits. In other examples, other suitable screen brightness can also be set.

[0092] Please see Figure 8 , Figure 8 This is a flowchart illustrating a method provided in this application for adjusting the initial backlight brightness data corresponding to the current display screen on the display device based on a first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data.

[0093] In one implementation of this embodiment, S3 may specifically include:

[0094] S31. Obtain the initial backlight brightness data corresponding to the current display screen on the display device.

[0095] S32. Calculate the product of the initial backlight brightness data and the first brightness weighting coefficient to obtain the target backlight brightness data, so that the display device can adjust the current screen brightness based on the target backlight brightness data.

[0096] Specifically, the ratio of the lowest screen brightness data to the highest screen peak brightness data is calculated to obtain the first brightness weighting coefficient. The lowest screen brightness data refers to the screen brightness value of a display device in a dark room environment where the reflected brightness is comfortable for the human eye. In one example, [the value is derived from...]. Figure 7 The curve shows that when the reflected brightness in the dark room environment is 2 nits, the screen brightness is close to 20 nits. Therefore, in this embodiment, the minimum screen brightness value can be 20 nits. The maximum screen peak brightness refers to the maximum brightness that can be displayed within the safe range of the display device's screen. It is a fixed value set at the factory. Depending on the model of the display device's screen, the maximum screen peak brightness value will vary, and this embodiment does not specifically limit it. For example, the maximum screen peak brightness of the display device in this embodiment can be 1300 nits.

[0097] Specifically, when the minimum screen brightness value is 20 nits and the maximum screen peak brightness is 1300 nits, the first brightness weighting coefficient is 20 / 1300.

[0098] It should be noted that, Figure 7 The curve showing the ratio of screen peak brightness to visual comfort under different reflectance levels is plotted from data collected by the inventors after conducting experiments. Specifically, the screen brightness value of approximately 20 nits when the reflectance in the aforementioned dark room environment is 2 nits is a constant determined experimentally and empirically. These constants are derived through experiments and experience. For example, they can be determined by comprehensively considering factors such as the human eye's perception of brightness, the optical and electrical properties of the liquid crystal display device, etc. In practical applications, these constants may vary depending on the type, brand, and application scenario of the display device, requiring adjustment and optimization based on specific circumstances. This application does not impose specific limitations on this aspect.

[0099] Specifically, when the display device is in a dark room environment, each data point in the initial backlight brightness data corresponding to the current display screen is multiplied by a first brightness weighting coefficient to obtain the target backlight brightness data. Based on this target backlight brightness data, the screen brightness corresponding to the current display screen is adjusted to achieve a target screen brightness adapted to the dark room environment. This allows the display device to have relatively low display brightness in a dark room environment, thereby protecting the user's eyes from damage and improving the user's viewing experience.

[0100] S4. When the current environment of the display device is a non-dark room environment, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to the second brightness weighting coefficient to obtain the target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data.

[0101] The second brightness weighting coefficient is the ratio of the target screen peak brightness data of the display device to the maximum screen peak brightness data of the display device; the target screen peak brightness data is the product of the screen peak brightness ratio of the display device and the first reflective brightness data. Therefore, the second brightness weighting coefficient is positively correlated with the product of the screen peak brightness ratio of the display device and the first reflective brightness data, and negatively correlated with the maximum screen peak brightness data of the display device.

[0102] Since the maximum peak brightness of the display device is the theoretical maximum screen brightness that can be achieved when the backlight module of the display device is at full power output, resulting in a pure white display (because a pure white display can theoretically achieve the brightest global image), under normal circumstances, the current display screen of the display device is not a pure white display screen. Moreover, due to power consumption considerations and the overcurrent protection of the display device's hardware, the target peak brightness corresponding to the current display screen of the display device will not exceed the maximum peak brightness of the display device. Therefore, the value of the second brightness weighting coefficient is no greater than 1.

[0103] Specifically, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted using the second brightness weighting coefficient to obtain the target backlight brightness data. This target backlight brightness data is actually the backlight brightness data obtained after brightness attenuation of the initial backlight brightness data. The reason is that when the current environment of the display device is a non-dark room environment, in order to avoid the strong light generated by the superposition of ambient light and display screen light in the non-dark room environment causing damage to the human eye and causing dizziness, it is necessary to appropriately reduce the brightness of the current display screen. However, it is also necessary to ensure that the adjusted screen display brightness is sufficient to see the content in the current display screen. Therefore, the initial backlight brightness data is adjusted using the second brightness weighting coefficient, which is simultaneously constrained by the screen peak brightness ratio and the first reflection brightness data.

[0104] Please see Figure 9 , Figure 9 This is a flowchart illustrating a method provided in this application for obtaining the screen peak brightness ratio of a display device based on first reflective brightness data and adjusting the currently displayed screen brightness of the display device based on the screen peak brightness ratio.

[0105] In one implementation of this embodiment, S4 may specifically include:

[0106] S41. Obtain the initial backlight brightness data corresponding to the current display screen on the display device.

[0107] S42. Obtain the peak brightness ratio of the display device's screen based on the first reflection brightness data.

[0108] Specifically, the first reflected brightness is the reflected brightness of the display device in its current environment under ambient light. In one example, due to... Figure 7 The horizontal axis of the curve represents reflected brightness, and the vertical axis represents the ratio of the screen peak brightness achieved by the display device at the corresponding reflected brightness level, which is comfortable for the human eye. Therefore, it can be seen through... Figure 7 The curve is used to find the screen peak brightness ratio corresponding to the value of the first reflection brightness data. Figure 7 After finding the screen peak brightness ratio value corresponding to the value of the first reflection brightness data, multiplying the value of the first reflection brightness data with the corresponding screen peak brightness ratio value will yield the screen peak brightness value of the current environment of the display device, which is the target screen peak brightness data of the display device.

[0109] It should be noted that the screen peak brightness ratio in this embodiment is used to reflect the human eye's ability to perceive the brightness difference between the screen peak brightness data of the display device and the first reflected brightness data of the display device in the current environment.

[0110] In one example, the peak screen brightness ratio can be the ratio of the peak screen brightness value that is comfortable for the human eye to the reflected brightness value. The relationship between this peak screen brightness ratio and the first reflected brightness data can be determined through human factors experiments. Specifically, the relationship between the first reflected brightness data and the peak screen brightness ratio of the display device can be obtained by statistically analyzing experimental test data between the background reflected brightness in various environments where the display device is located and the peak screen brightness of the display device when displaying a full white image under various background reflected brightness conditions. For example, experimental conditions can be pre-set (such as ambient light intensity settings, setting the range of reflected brightness values, listing various possible environmental conditions for the display device, setting evaluation conditions for human eye comfort, classifying the participants in the test, etc.). A large amount of experimental test data can be obtained through human factors experiments. Data analysis (such as data fitting, data clustering, etc.) can be performed on this experimental test data to determine the relationship between the peak screen brightness ratio and the first reflected brightness data, and this relationship can be solidified through a formula.

[0111] It should be noted that the peak brightness ratio is a parameter that reflects the human eye's ability to perceive the peak brightness of a display device's screen and the reflected brightness of the ambient light surrounding the display device. This parameter represents the human eye's perception of the combined brightness of the display device's screen and the ambient light. Figure 7 The curve shown illustrates the relationship between the screen peak brightness ratio, which is considered comfortable for the human eye, and various reflective brightness levels, as measured by human factors experiments. This curve is only a reference curve for a specific type of display device. The specific values ​​of this curve will vary for different display devices, but the general shape and trend of the curve are consistent. That is, when the reflective brightness is low, a higher screen peak brightness ratio makes the display screen more comfortable for the human eye; when the reflective brightness gradually brightens to a certain target threshold, the screen peak brightness ratio decreases, making the display screen more comfortable for the human eye; and when the reflective brightness exceeds the target threshold and then gradually brightens, the screen peak brightness ratio increases, making the display screen more comfortable for the human eye. The aforementioned curve trend is based on biological evidence. Maintaining high contrast for extended periods can excessively strain the human retina, leading to eye fatigue, dizziness, and decreased vision. Over time, it can also damage the visual pigments on cone cells, causing significant harm to the eyes. Therefore, display devices need to adjust contrast appropriately based on the specific environment during use. Conversely, if the brightness remains at low contrast for an extended period, the image cannot maintain a clear and striking display effect, and the colors cannot be displayed as vividly and brightly.

[0112] In one embodiment, obtaining the peak brightness ratio of the display device's screen based on the first reflective brightness data may specifically include: calculating the peak brightness ratio of the display device's screen based on a preset formula and the first reflective brightness data. The preset formula may be:

[0113]

[0114] Among them, L ratio It is the screen peak brightness ratio, L rf These are the first reflection brightness data, where K1, K2, K3, and K4 are all constants.

[0115] In one example, the above formula can be derived from... Figure 7 The peak brightness ratio of the screen is obtained by curve fitting. Therefore, the values ​​of coefficients K1, K2, K3, and K4 in the above formula are fixed, with K1 being 2.60 * 10. -7 K2 is 8.54*10 -5 K3 is 1.01*10 -2 K4 is 4.92*10 -1 It should be noted that in this example, the values ​​of K1, K2, K3, and K4 are based on... Figure 7 The solution is obtained by fitting the curve. Specifically, substituting the value of the first reflected luminance data into the above formula yields the peak luminance ratio of the current display device.

[0116] It should be noted that, Figure 7 This is a curve representing the ratio of screen peak brightness that is comfortable for the human eye under different reflective brightness levels. It was plotted by the inventors based on collected data after conducting experiments. It is conceivable that in practical applications, the curve representing the ratio of screen peak brightness that is comfortable for the human eye under different reflective brightness levels may vary depending on the type, brand, and application scenario of the display device, requiring adjustment and optimization according to specific circumstances. This application does not impose specific limitations on this. Furthermore, in the above example, the values ​​of K1, K2, K3, and K4 are solutions obtained by fitting the curve representing the ratio of screen peak brightness that is comfortable for the human eye under different reflective brightness levels. Therefore, when the curve representing the ratio of screen peak brightness that is comfortable for the human eye under different reflective brightness levels changes, the values ​​of K1, K2, K3, and K4 will change accordingly.

[0117] S43. Calculate the product of the screen peak brightness ratio and the first reflection brightness data to obtain the target screen peak brightness data of the display device.

[0118] In one embodiment, since the peak brightness ratio is defined as the ratio between the peak brightness of the current display screen of the display device and the ambient light reflection brightness of the current environment in which the display device is located (i.e., the first reflection brightness data), the peak brightness ratio can be multiplied by the first reflection brightness data to obtain the peak brightness data.

[0119] It should be noted that the target screen peak brightness data obtained in the above embodiments is the screen brightness data that the display device can achieve when displaying a full white screen. As long as the current display screen is not a full white screen, it is impossible to reach the target screen peak brightness data. Therefore, the target screen peak brightness data can only be used as a peak brightness data that the current screen can theoretically achieve for theoretical calculation to obtain the second brightness weighting coefficient.

[0120] S44. Calculate the ratio between the target screen peak brightness data and the display device's maximum screen peak brightness data as the second brightness weighting coefficient.

[0121] Maximum peak screen brightness refers to the maximum brightness that can be displayed within the safe range of the display device's screen. It is a fixed value set at the factory when the display device's screen is manufactured. The maximum peak screen brightness value varies depending on the model of the display device's screen. For example, the maximum peak screen brightness of the display device in this embodiment is 1300 nits.

[0122] Specifically, the ratio of the peak screen brightness data to the maximum peak screen brightness data is the second brightness weighting coefficient.

[0123] S45. Calculate the product of the initial backlight brightness data and the second brightness weighting coefficient to obtain the target backlight brightness data, so that the display device can adjust the current screen brightness based on the target backlight brightness data.

[0124] Specifically, when the display device is in a non-dark room environment, each of the initial backlight brightness data mentioned above is multiplied by the second brightness weighting coefficient to obtain the target backlight brightness data. Based on the initial backlight brightness data multiplied by the second weighting coefficient, the screen brightness of the display device is adjusted so that the display device has a relatively high display brightness in a non-dark room environment, thereby ensuring that the user can clearly see the display screen and improving the user's viewing experience.

[0125] Please see Figure 10 , Figure 10 This is a flowchart illustrating a method for obtaining initial backlight brightness data corresponding to the current display screen on a display device, according to an embodiment of this application.

[0126] In one embodiment, obtaining the initial backlight brightness data corresponding to the current display screen on the display device includes:

[0127] S52. Calculate the first backlight brightness data corresponding to the current display screen based on the pixel brightness characteristics of the current display screen on the display device.

[0128] The first backlight brightness data includes at least one backlight brightness value.

[0129] In one implementation, the first backlight brightness data corresponding to the current display screen is calculated based on the pixel brightness characteristics of the current display screen on the display device. Specifically, this may include: dividing the display screen into at least one partition screen; for each partition screen, calculating a pixel brightness feature value that can characterize the pixel brightness characteristics of the partition screen, and using it as the backlight brightness value corresponding to the partition screen; and summing up the backlight brightness values ​​corresponding to multiple partition screens as the first backlight brightness data corresponding to the display screen.

[0130] In one example, in order to calculate the first backlight brightness data corresponding to the current display screen based on the pixel brightness characteristics of the current display screen most closely, the current display screen can be partitioned according to the partition parameters of the display device in the hardware specifications. For example, if the display device has 480 backlight partitions, the current display screen can be partitioned one-to-one with the division area of ​​the backlight partition, so that each partitioned screen completely corresponds to a backlight partition.

[0131] The pixel brightness feature value may include at least one of the following: pixel brightness mean, pixel brightness median, pixel brightness minimum, pixel brightness maximum, and pixel brightness weighted value.

[0132] In one embodiment, the average pixel brightness, minimum pixel brightness, and maximum pixel brightness can be obtained by the following formula:

[0133]

[0134] L2 = max(I i );

[0135] L3=min(I i );

[0136] Among them, I i Let L1 be the brightness of the i-th pixel in the partitioned image, n be the total number of pixels in the partitioned image, L1 be the average brightness of the pixels in the partitioned image, L2 be the maximum brightness of the pixels in the partitioned image, and L3 be the minimum brightness of the pixels in the partitioned image.

[0137] Determining the backlight brightness value of a given partition of the screen based on its pixel brightness characteristic values ​​can be achieved by using the average pixel brightness of the partition as the backlight brightness value; the median pixel brightness of the partition as the backlight brightness value; the minimum pixel brightness of the partition as the backlight brightness value; the maximum pixel brightness of the partition as the backlight brightness value; or by combining any two or three of the average, minimum, and maximum pixel brightness values ​​to calculate a weighted value for the pixel brightness of the partition as the backlight brightness value. It should be noted that the calculation method for the pixel brightness characteristic values ​​and backlight brightness value of the partition can be determined based on the design of the LCD monitor and the application scenario. Furthermore, the hardware characteristics and power consumption limitations of the LCD monitor can be considered to achieve balanced backlight control.

[0138] In one embodiment of this application, the pixel brightness feature value may include a pixel brightness weighted value obtained by combining the average pixel brightness and the maximum pixel brightness. Specifically, for each partition screen, calculating a pixel brightness feature value that can characterize the pixel brightness features of the partition screen and using it as the backlight brightness value corresponding to the partition screen may include: for each partition screen, performing a weighted summation of the average pixel brightness and the maximum pixel brightness of the partition screen to obtain a pixel brightness weighted value as the backlight brightness value corresponding to the partition screen.

[0139] The backlight brightness value of each partition can be calculated using a weighted method. A weighting coefficient is set for the average pixel brightness and the maximum pixel brightness of that partition, and then a weighted sum is performed. For example, the weighting coefficient for the average pixel brightness can be set to 0.3, and the weighting coefficient for the maximum pixel brightness can be set to 0.7. Therefore, the backlight brightness value of a partition = 0.3 * average pixel brightness + 0.7 * maximum pixel brightness. By setting weighting coefficients of 0.3 and 0.7, the lower weight of the average pixel brightness effectively reduces the impact of low-brightness areas on the backlight brightness, preventing the image from being too dark and improving overall brightness and clarity. The higher weight of the maximum pixel brightness better preserves the details and brightness information of brighter areas, improving contrast and dynamic range for a brighter and more vivid image. Finally, the overall weighting balances the brightness characteristics of different areas of the image, achieving more balanced backlight control. This avoids oversaturation or distortion, improving the visual experience and display effect. Of course, in practical applications, other weighting coefficients or methods can be used to determine the backlight brightness of a zone. For example, the weighting coefficient for the average pixel brightness can be set to 0, and the weighting coefficient for the maximum pixel brightness can be set to 1. Then, the backlight brightness value of a zone = 0 * average pixel brightness + 1 * maximum pixel brightness. This is mainly for images with a single-tone background or text content of a single color on the background, in order to make the text clearer.

[0140] S54. Obtain the backlight brightness adjustment parameters of the current display screen based on the first backlight brightness data.

[0141] Backlight brightness adjustment parameters refer to parameters that adjust the backlight brightness in the first backlight brightness data. Their main purpose is to differentiate between bright and dark areas, making bright areas brighter or dark areas darker. In this embodiment, the adjustment primarily targets the backlight brightness of dark areas to make bright areas appear brighter.

[0142] Specifically, the backlight brightness adjustment parameters of the display screen are obtained based on the first backlight brightness data, including: summarizing all backlight brightness values ​​in the first backlight brightness data to calculate the first backlight data sum of the first backlight brightness data; and calculating the first ratio between the first backlight data sum and the maximum backlight data sum corresponding to when the backlight of the display device is fully lit as the backlight brightness adjustment parameter of the current display screen.

[0143] The first backlight data sum refers to the sum of all backlight brightness values ​​corresponding to the current display screen on the display device. This can be obtained by summing the backlight brightness values ​​of each partition of the display device. The maximum backlight data sum refers to the sum of the corresponding backlight brightness values ​​when all backlight modules of the display device are fully lit (i.e., fully lit). Specifically, it can be obtained by multiplying the number of partitions of the display device (e.g., 480 partitions) by 255 (i.e., each partition can reach the maximum backlight brightness value of 255). The ratio of the first backlight data sum to the maximum backlight data sum is the backlight brightness adjustment parameter. The backlight brightness value of each partition screen can be obtained according to the above embodiment.

[0144] S56. Adjust the backlight brightness value that is lower than the average brightness value of the current display screen in the first backlight brightness data according to the backlight brightness adjustment parameters to obtain the second backlight brightness data.

[0145] In one example, adjusting the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen according to the backlight brightness adjustment parameters to obtain the second backlight brightness data may specifically include: comparing a first ratio value with a preset first threshold and a second threshold, wherein the first threshold is greater than the second threshold; when the first ratio value is greater than the first threshold, multiplying the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen by a preset first coefficient to obtain the second backlight brightness data; when the first ratio value is less than or equal to the first threshold and greater than the second threshold, multiplying the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen by a preset second coefficient to obtain the second backlight brightness data.

[0146] The preset first and second thresholds are reference thresholds used to assess whether the contrast of the current display screen needs to be adjusted. These two types of reference thresholds are related to the model, specifications, and brand of the display screen, and can be obtained by analyzing and summarizing multiple experimental test data from brightness and contrast tests of different display screens. The preset first and second coefficients are reference coefficients used to adjust the contrast of the current display screen if contrast needs to be improved. These can also be obtained by analyzing and summarizing multiple experimental test data from brightness and contrast tests of the display screen. That is, the specific values ​​of the first threshold, second threshold, first coefficient, and second coefficient can all be determined based on experiments and experience. For example, the first threshold is K1, the second threshold is K2, K1>K2, K1 can be a value in the range of 0.3 to 0.4, and K2 can be a value in the range of 0.2 to 0.3. In one example, the values ​​of K1 and K2 can be: K1 = 0.32, K2 = 0.21.

[0147] In this system, both the first and second coefficients are greater than 0 and less than or equal to 1, and the sum of the first and second coefficients is 1. For example, the ratio of the first coefficient to the second coefficient can be 3:7, 2:8, or 0:1, etc.

[0148] In one example, K1 = 0.32, K2 = 0.21, the first coefficient is 0.3, and the second coefficient is 0.7. When the first ratio is greater than 0.32, the backlight brightness values ​​in the first backlight brightness data that are less than the average brightness value are multiplied by 0.3; when the first ratio is less than or equal to 0.32 and greater than 0.21, the backlight brightness values ​​in the first backlight brightness data that are less than the average brightness value are multiplied by 0.7. If the first ratio is less than or equal to 0.21, the backlight brightness values ​​in the first backlight brightness data that are less than the average brightness value are multiplied by 1.

[0149] The aforementioned ratio value is used to adjust the backlight brightness of areas with lower-than-average brightness values ​​using a set coefficient, thereby making dark areas darker and improving screen contrast. This makes bright areas brighter and the text displayed on the screen clearer.

[0150] S58. Adjust the second backlight brightness data according to the limiting parameters of the display device under different brightness levels to obtain the initial backlight brightness data corresponding to the current display screen.

[0151] Among them, the limiting parameters of the display device under different brightness levels can be based on the above. Figure 1 The peak brightness algorithm curve shown is used to determine this, specifically based on... Figure 1 The horizontal axis value is determined by the ratio of the initial backlight brightness data of the current display screen to the maximum backlight brightness data when the display screen is fully lit. In other words, the horizontal axis value represents the brightness ratio of the current display screen. The vertical axis refers to the power consumption limit factor corresponding to each brightness ratio, which is the limit factor mentioned below.

[0152] In this embodiment, after obtaining the second backlight brightness data through the above steps, the obtained second backlight brightness data is further adjusted based on the peak brightness algorithm curve to obtain the initial backlight brightness data corresponding to the display screen.

[0153] Specifically, adjusting the second backlight brightness data according to the limiting parameters of the display device under different brightness levels to obtain the initial backlight brightness data corresponding to the current display screen may include: calculating the sum of the second backlight data corresponding to the second backlight brightness data; calculating a second ratio between the sum of the second backlight data and the maximum sum of the backlight data corresponding to the display device when the backlight is fully lit; obtaining a limiting factor corresponding to the second ratio value according to the limiting parameters of the display device under different brightness levels; adjusting the second backlight brightness data according to the limiting factor to obtain the adjusted second backlight brightness data as the initial backlight brightness data corresponding to the current display screen.

[0154] The second backlight data sum refers to the summation of each backlight brightness value in the second backlight brightness data. The maximum backlight data sum refers to the summation of the corresponding backlight brightness values ​​when all the backlight modules of the display device are fully lit (i.e., fully lit). Specifically, it can be obtained by multiplying the number of partitions of the display device (e.g., 480 partitions) by 255 (i.e., each partition can reach the maximum backlight brightness value of 255).

[0155] The second ratio value is obtained by proportionally dividing the sum of the second backlight data by the sum of the maximum backlight data.

[0156] The second ratio value is compared with the limiting parameters of the display device under different brightness levels to obtain the limiting factor corresponding to the second ratio value. Finally, the second backlight brightness data is adjusted according to the limiting factor.

[0157] The limiting parameters can include a first interval range, a second interval range, and a third interval range, which can be (0, 0.21 * the maximum backlight data sum when the backlight is fully lit), (0.21 * the maximum backlight data sum when the backlight is fully lit, 0.4 * the maximum backlight data sum when the backlight is fully lit), and (0.4 * the maximum backlight data sum when the backlight is fully lit, 1 * the maximum backlight data sum when the backlight is fully lit) as described in the above embodiments. The limiting factor is determined by judging the interval range to which the second proportional value belongs. The limiting factor corresponding to the interval range, and the detailed process of adjusting the second backlight brightness data according to the limiting factor, can be found in the above embodiments.

[0158] Please see Figure 11 , Figure 11 This is a flowchart illustrating a method for obtaining initial backlight brightness data corresponding to the current display screen on a display device, provided in another embodiment of this application.

[0159] In another embodiment, obtaining the initial backlight brightness data corresponding to the current display screen on the display device includes:

[0160] S51. Calculate the first backlight brightness data corresponding to the current display screen based on the pixel brightness characteristics of the current display screen on the display device.

[0161] The first backlight brightness data includes at least one backlight brightness value.

[0162] In one implementation, the first backlight brightness data corresponding to the current display screen is calculated based on the pixel brightness characteristics of the current display screen on the display device. Specifically, this may include: dividing the display screen into at least one partition screen; for each partition screen, calculating a pixel brightness feature value that can characterize the pixel brightness characteristics of the partition screen, and using it as the backlight brightness value corresponding to the partition screen; and summing up the backlight brightness values ​​corresponding to multiple partition screens as the first backlight brightness data corresponding to the display screen.

[0163] In one example, in order to calculate the first backlight brightness data corresponding to the current display screen based on the pixel brightness characteristics of the current display screen most closely, the current display screen can be partitioned according to the partition parameters of the display device in the hardware specifications. For example, if the display device has 480 backlight partitions, the current display screen can be partitioned one-to-one with the division area of ​​the backlight partition, so that each partitioned screen completely corresponds to a backlight partition.

[0164] The pixel brightness feature value may include at least one of the following: pixel brightness mean, pixel brightness median, pixel brightness minimum, pixel brightness maximum, and pixel brightness weighted value.

[0165] In one example, for each partitioned frame, a pixel brightness feature value that characterizes the pixel brightness characteristics of that partitioned frame is calculated and used as the backlight brightness value corresponding to that partitioned frame. Specifically, this may include: for each partitioned frame, traversing and sorting the pixel brightness values ​​of all pixels in that partitioned frame, and selecting the median pixel brightness value located in the middle position among all sorted pixel brightness values ​​as the backlight brightness value corresponding to that partitioned frame. That is, the median of the pixel brightness values ​​in each partitioned frame is calculated as the pixel brightness feature value of that partitioned frame, used to characterize the pixel brightness characteristics of that partitioned frame.

[0166] In another example, for each partitioned screen, a pixel brightness feature value that can characterize the pixel brightness features of the partitioned screen is calculated as the backlight brightness value corresponding to the partitioned screen. Specifically, this may include: for each partitioned screen, traversing the pixel brightness values ​​of all pixels in the partitioned screen and calculating the sum of all pixel brightness values, calculating the ratio of the sum to the total number of pixels in the partitioned screen, obtaining the average pixel brightness of the partitioned screen, which is used as the backlight brightness value corresponding to the partitioned screen.

[0167] In another example, for each partition screen, a pixel brightness feature value that can characterize the pixel brightness feature of the partition screen is calculated as the backlight brightness value corresponding to the partition screen. Specifically, this may include: for each partition screen, traversing and sorting the pixel brightness values ​​of all pixels in the partition screen, and selecting the maximum pixel brightness value with the largest value among all sorted pixel brightness values ​​as the backlight brightness value corresponding to the partition screen.

[0168] In another example, for each partitioned screen, a pixel brightness feature value that can characterize the pixel brightness features of that partitioned screen is calculated as the backlight brightness value corresponding to that partitioned screen. Specifically, this may include: for each partitioned screen, traversing and sorting the pixel brightness values ​​of all pixels in that partitioned screen, and selecting the minimum pixel brightness value among all sorted pixel brightness values ​​as the backlight brightness value corresponding to that partitioned screen.

[0169] In another example, for each partitioned screen, a pixel brightness feature value that characterizes the pixel brightness features of that partitioned screen is calculated as the backlight brightness value corresponding to that partitioned screen. Specifically, this can include: for each partitioned screen, a weighted sum of the mean, minimum, and maximum pixel brightness values ​​of that partitioned screen is performed to obtain a weighted pixel brightness value as the backlight brightness value corresponding to that partitioned screen. Among these, the weighted pixel brightness value best approximates the true backlight brightness of that partitioned screen.

[0170] In one embodiment, the average pixel brightness, minimum pixel brightness, and maximum pixel brightness can be obtained by the following formula:

[0171]

[0172] L2 = max(I i );

[0173] L3=min(I i );

[0174] Among them, I i Let L1 be the brightness of the i-th pixel in the partitioned image, n be the total number of pixels in the partitioned image, L1 be the average brightness of the pixels in the partitioned image, L2 be the maximum brightness of the pixels in the partitioned image, and L3 be the minimum brightness of the pixels in the partitioned image.

[0175] Determining the backlight brightness value of a given partition of the screen based on its pixel brightness characteristic values ​​can be achieved by using the average pixel brightness of the partition as the backlight brightness value; the median pixel brightness of the partition as the backlight brightness value; the minimum pixel brightness of the partition as the backlight brightness value; the maximum pixel brightness of the partition as the backlight brightness value; or by combining any two or three of the average, minimum, and maximum pixel brightness values ​​to calculate a weighted value for the pixel brightness of the partition as the backlight brightness value. It should be noted that the calculation method for the pixel brightness characteristic values ​​and backlight brightness value of the partition can be determined based on the design of the LCD monitor and the application scenario. Furthermore, the hardware characteristics and power consumption limitations of the LCD monitor can be considered to achieve balanced backlight control.

[0176] In one embodiment of this application, the pixel brightness feature value may include a pixel brightness weighted value obtained by combining the average pixel brightness and the maximum pixel brightness. Specifically, for each partition screen, calculating a pixel brightness feature value that can characterize the pixel brightness features of the partition screen and using it as the backlight brightness value corresponding to the partition screen may include: for each partition screen, performing a weighted summation of the average pixel brightness and the maximum pixel brightness of the partition screen to obtain a pixel brightness weighted value as the backlight brightness value corresponding to the partition screen.

[0177] The backlight brightness value of each partition can be calculated using a weighted method. A weighting coefficient is set for the average pixel brightness and the maximum pixel brightness of that partition, and then a weighted sum is performed. For example, the weighting coefficient for the average pixel brightness can be set to 0.3, and the weighting coefficient for the maximum pixel brightness can be set to 0.7. Therefore, the backlight brightness value of a partition = 0.3 * average pixel brightness + 0.7 * maximum pixel brightness. By setting weighting coefficients of 0.3 and 0.7, the lower weight of the average pixel brightness effectively reduces the impact of low-brightness areas on the backlight brightness, preventing the image from being too dark and improving overall brightness and clarity. The higher weight of the maximum pixel brightness better preserves the details and brightness information of brighter areas, improving contrast and dynamic range for a brighter and more vivid image. Finally, the overall weighting balances the brightness characteristics of different areas of the image, achieving more balanced backlight control. This avoids oversaturation or distortion, improving the visual experience and display effect. Of course, in practical applications, other weighting coefficients or methods can be used to determine the backlight brightness of a zone. For example, the weighting coefficient for the average pixel brightness can be set to 0, and the weighting coefficient for the maximum pixel brightness can be set to 1. Then, the backlight brightness value of a zone = 0 * average pixel brightness + 1 * maximum pixel brightness. This is mainly for images with a single-tone background or text content of a single color on the background, in order to make the text clearer.

[0178] S53. Summarize all backlight brightness values ​​in the first backlight brightness data to calculate the sum of the first backlight brightness data.

[0179] The first backlight data sum refers to the sum of all backlight brightness values ​​in the first backlight brightness data. It can be obtained by summing the backlight brightness values ​​of all zones.

[0180] S55. Calculate the ratio between the sum of the first backlight data and the maximum sum of backlight data when the backlight of the display device is fully lit.

[0181] The maximum backlight data sum refers to the sum of the corresponding backlight brightness values ​​when all the backlight modules of the display device are lit (i.e., the backlight of the display screen is fully lit). Specifically, it can be obtained by multiplying the number of partitions of the display device (e.g., 480 partitions) by 255 (i.e., each partition can reach the maximum backlight brightness value of 255).

[0182] S57. Obtain the limiting factor corresponding to the ratio value based on the limiting parameters of the display device under different brightness levels.

[0183] The aforementioned ratio is the ratio of the first backlight data to the second backlight data.

[0184] The limiting parameters of the display device at different brightness levels can be determined according to the above. Figure 1 The peak brightness algorithm curve shown is used to determine this, specifically based on... Figure 1 The horizontal axis value is determined by the ratio of the sum of the first backlight brightness data of the display screen to the sum of the data when the backlight is fully lit. That is, the horizontal axis value represents the brightness ratio of the display device. The vertical axis refers to the power consumption limit factor corresponding to the brightness ratio, which is the limit factor mentioned below.

[0185] The limiting parameters can include a first interval range, a second interval range, and a third interval range, which can be (0, 0.21 * the sum of backlight data when the backlight is fully lit), (0.21 * the sum of backlight data when the backlight is fully lit, 0.4 * the sum of backlight data when the backlight is fully lit), and (0.4 * the sum of backlight data when the backlight is fully lit, 1 * the sum of backlight data when the backlight is fully lit) as described in the above embodiments. The limiting factor is determined by judging the interval range to which the ratio value belongs.

[0186] S59. Adjust the first backlight brightness data according to the limiting factor to obtain the initial backlight brightness data corresponding to the current display screen.

[0187] For a detailed process of adjusting the first initial backlight brightness data according to the limiting factor to obtain the initial backlight brightness data corresponding to the current display screen, please refer to the above embodiment.

[0188] Please see Figure 12 , Figure 12 This is a schematic diagram of a display screen on a display device provided in an embodiment of this application. The display screen includes a displayed image. The brightness of each pixel in the display screen is calculated, and the display screen is divided into partitions. Taking a 24*20 partition (480 partitions in total) LCD as an example, the current image is divided into 24*20 image partitions according to the backlight partitions. Then, the backlight brightness of each partition is calculated using the steps S52-S58 described above, resulting in the following... Figure 13 The matrix of initial backlight brightness data shown should be noted as follows: Figure 13 Only a portion of the partitions in a 24*20 partition are shown as an example.

[0189] This application provides a screen brightness adjustment method. The method acquires first reflected brightness data of the display device in its current environment; determines the current environment type based on the first reflected brightness data, which is categorized as a darkroom environment or a non-darkroom environment; when the current environment type is a darkroom environment, the method adjusts the initial backlight brightness data corresponding to the current display screen on the display device according to a first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data; the first brightness weighting coefficient is the ratio of the display device's minimum screen brightness data to its maximum screen peak brightness data, i.e., the first brightness weighting coefficient is directly proportional to the minimum screen brightness data and inversely proportional to the maximum screen peak brightness data. The first brightness weighting coefficient is influenced by both the minimum screen brightness data and the maximum screen peak brightness data of the display device. The shared constraint of brightness data allows for the adjustment of the initial backlight brightness data of the current display screen using a first brightness weighting coefficient. This can appropriately reduce the current screen brightness in a dark room without making the screen too dark for the user to see clearly, avoiding strong contrast between light and dark and reducing user discomfort when viewing the display screen in a dark environment. When the display device is in a non-dark room environment, the initial backlight brightness data corresponding to the current display screen is adjusted according to a second brightness weighting coefficient to obtain target backlight brightness data. This allows the display device to adjust the current screen brightness based on the target backlight brightness data. The second brightness weighting coefficient is the ratio of the target peak screen brightness data to the maximum peak screen brightness data of the display device. The target peak screen brightness data is the product of the peak screen brightness ratio and the first reflected brightness data.The second brightness weighting coefficient is positively correlated with the ratio of the display device's peak brightness to the current first reflected brightness data, and negatively correlated with the display device's maximum peak brightness data. When ambient reflected light becomes increasingly intense, the combined strong light from the ambient light and the screen display light can easily cause eye fatigue and dizziness. In this case, the second brightness weighting coefficient is adjusted not only according to the ambient light (first reflected brightness data) but also simultaneously according to the display device's peak brightness ratio. The peak brightness ratio is related to the display device's screen light. Therefore, the second brightness weighting coefficient is constrained by three parameters: the peak brightness ratio, the first reflected brightness data, and the maximum peak brightness. This helps to mitigate the discomfort caused by the combined strong light from the ambient light and the screen display light. Furthermore, the product of the peak brightness ratio and the first reflected brightness data is the target peak brightness data. This target peak brightness data characterizes the display device's brightness performance under different ambient light conditions, ensuring the contrast of the displayed image and preventing unclear image content when adjusting for brightness decay or dimming of the current display.

[0190] The implementation method provided in this application offers two dimming strategies for display devices in darkroom and non-darkroom environments. In a darkroom environment, the display device's screen brightness is set by considering its minimum and maximum peak brightness data. In a non-darkroom environment, the display device's screen brightness is set by considering the ambient light, the ratio of peak brightness to maximum peak brightness, and the ambient light in the environment. These two dimming strategies can adaptively adjust the screen brightness, keeping the screen display brightness and ambient reflection brightness within a comfortable viewing range for the human eye. This avoids strong contrasts between light and dark areas, protecting the eyes while providing a better visual viewing experience for users.

[0191] Please see Figure 14 , Figure 14 This is a schematic diagram of the structure of a screen brightness adjustment device provided in an embodiment of this application.

[0192] This application embodiment also provides a screen brightness adjustment device 100, applied to a display device. The screen brightness adjustment device 100 includes: a reflective brightness acquisition module 101, an environment detection module 102, a first screen brightness adjustment module 103, and a second screen brightness adjustment module 104.

[0193] The reflectance brightness acquisition module 101 is used to acquire the first reflectance brightness data of the display device in the current environment.

[0194] The environment detection module 102 is used to determine the current environment type of the display device based on the first reflection brightness data. The environment type includes darkroom environment and non-darkroom environment.

[0195] The first screen brightness adjustment module 103 is used to adjust the initial backlight brightness data corresponding to the current display screen on the display device according to the first brightness weighting coefficient when the current environment of the display device is a dark room environment, so as to obtain the target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data; wherein, the first brightness weighting coefficient is the ratio of the minimum screen brightness data of the display device to the maximum screen peak brightness data of the display device.

[0196] The second screen brightness adjustment module 104 is used to adjust the initial backlight brightness data corresponding to the current display screen on the display device according to the second brightness weighting coefficient when the current environment of the display device is a non-dark room environment, so as to obtain target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data; wherein, the second brightness weighting coefficient is the ratio of the target screen peak brightness data of the display device to the maximum screen peak brightness data of the display device; the target screen peak brightness data is the product between the screen peak brightness ratio of the display device and the first reflection brightness data.

[0197] In some embodiments, the first screen brightness adjustment module 103 is specifically used to: obtain the initial backlight brightness data corresponding to the current display screen on the display device; calculate the product of the initial backlight brightness data and the first brightness weighting coefficient to obtain the target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data.

[0198] In some embodiments, the second screen brightness adjustment module 104 is specifically configured to: acquire initial backlight brightness data corresponding to the current display screen on the display device; acquire the screen peak brightness ratio of the display device based on the first reflection brightness data; calculate the product of the screen peak brightness ratio and the first reflection brightness data to obtain the target screen peak brightness data of the display device; calculate the ratio between the target screen peak brightness data and the maximum screen peak brightness data of the display device as a second brightness weighting coefficient; and calculate the product of the initial backlight brightness data and the second brightness weighting coefficient to obtain the target backlight brightness data, so that the display device adjusts the currently displayed screen brightness based on the target backlight brightness data.

[0199] In some embodiments, the first screen brightness adjustment module 103 is further configured to: calculate first backlight brightness data corresponding to the current display screen based on the pixel brightness characteristics of the current display screen on the display device, the first backlight brightness data including at least one backlight brightness value; obtain backlight brightness adjustment parameters for the current display screen based on the first backlight brightness data; adjust the backlight brightness values ​​in the first backlight brightness data that are less than the average brightness value of the current display screen based on the backlight brightness adjustment parameters to obtain second backlight brightness data; and adjust the second backlight brightness data according to the limiting parameters of the display device under different brightness levels to obtain initial backlight brightness data corresponding to the current display screen.

[0200] Alternatively, the first backlight brightness data corresponding to the current display screen is calculated based on the pixel brightness characteristics of the current display screen on the display device. The first backlight brightness data includes at least one backlight brightness value. All backlight brightness values ​​in the first backlight brightness data are summed to calculate the first backlight data sum. The ratio between the first backlight data sum and the maximum backlight data sum corresponding to the display device when the backlight is fully lit is calculated. According to the limiting parameters of the display device under different brightness levels, the limiting factor corresponding to the ratio value is obtained. The first backlight brightness data is adjusted according to the limiting factor to obtain the initial backlight brightness data corresponding to the current display screen.

[0201] In some embodiments, the first screen brightness adjustment module 103 is further configured to: summarize all backlight brightness values ​​in the first backlight brightness data to calculate the first backlight data sum of the first backlight brightness data; and calculate the first ratio between the first backlight data sum and the maximum backlight data sum corresponding to when the backlight of the display device is fully lit as the backlight brightness adjustment parameter of the current display screen.

[0202] In some embodiments, the first screen brightness adjustment module 103 is further configured to: compare the first ratio value with a preset first threshold and a second threshold respectively, wherein the first threshold is greater than the second threshold; when the first ratio value is greater than the first threshold, multiply the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen by a preset first coefficient to obtain the second backlight brightness data; when the first ratio value is less than or equal to the first threshold and greater than the second threshold, multiply the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen by a preset second coefficient to obtain the second backlight brightness data.

[0203] In some embodiments, the first screen brightness adjustment module 103 is further configured to: calculate the second backlight data sum corresponding to the second backlight brightness data; calculate a second ratio between the second backlight data sum and the maximum backlight data sum corresponding to when the backlight of the display device is fully lit; obtain a limiting factor corresponding to the second ratio based on the limiting parameters of the display device under different brightness levels; adjust the second backlight brightness data according to the limiting factor to obtain the adjusted second backlight brightness data as the initial backlight brightness data corresponding to the current display screen.

[0204] In some embodiments, the reflectance brightness acquisition module 101 is specifically used to: acquire the illuminance value of the ambient light received by the display device in the current environment; and calculate the first reflectance brightness data of the display device in the current environment based on the illuminance value.

[0205] In some embodiments, the environment detection module 102 is specifically used to: compare the first reflectance brightness data with the preset second reflectance brightness data, wherein the second reflectance brightness data is a critical value for distinguishing between a darkroom environment and a non-darkroom environment; when the first reflectance brightness data is less than the preset second reflectance brightness data, determine that the current environment type of the display device is a darkroom environment; when the first reflectance brightness data is greater than or equal to the preset second reflectance brightness data, determine that the current environment type of the display device is a non-darkroom environment.

[0206] In some embodiments, the screen peak brightness ratio is used to reflect the human eye's ability to perceive the brightness difference between the screen peak brightness data of the display device and the first reflected brightness data of the display device in the current environment.

[0207] It should be noted that the above-described screen brightness adjustment device can execute the screen brightness adjustment method provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects of the method. Technical details not described in detail in the embodiments of the display screen brightness adjustment device can be found in the screen brightness adjustment method provided in the embodiments of this application.

[0208] Please see Figure 15 , Figure 15 This is a schematic diagram of the hardware structure of the display device 300 that performs the screen brightness adjustment method according to an embodiment of this application. Figure 15 As shown, the display device 300 includes:

[0209] One or more processors 301 and memory 302, Figure 15 Take processor 301 as an example.

[0210] Processor 301 and memory 302 can be connected via a bus or other means. Figure 15 Taking the example of a connection between China and Israel via a bus.

[0211] Memory 302, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the screen brightness adjustment method in the embodiments of this application (e.g., attached...). Figure 14 (The various modules shown). The processor 301 executes various server functions and data processing by running non-volatile software programs, instructions, and modules stored in the memory 302, thereby implementing the screen brightness adjustment method of the above method embodiment.

[0212] The memory 302 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the screen brightness adjustment device. Furthermore, the memory 302 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 302 may optionally include memory remotely located relative to the processor 301, and this remote memory may be connected to the screen brightness adjustment device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0213] The one or more modules are stored in the memory 302. When executed by the one or more processors 301, they execute the screen brightness adjustment method in any of the above method embodiments and implement the functions of the modules of the screen brightness adjustment device in the above embodiments.

[0214] The above-described product can perform the methods provided in the embodiments of this application, and has the corresponding functional modules and beneficial effects for performing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in the embodiments of this application.

[0215] The display device in this application embodiment exists in various forms, including a monitor, which includes the aforementioned processor 301 and memory 302. It also includes personal computers, servers, etc. When the display device is a terminal device such as a personal computer or server, the displayed image can be the image on the monitor integrated into the personal computer or server itself. Alternatively, it can be the image on a monitor externally connected to the personal computer or server via wired or wireless means, with the personal computer or server communicatively connected to the monitor for executing the aforementioned screen brightness adjustment method.

[0216] This application provides a computer storage medium storing computer-executable instructions that are executed by one or more processors, for example... Figure 15One of the processors 301 enables the processors to execute the screen brightness adjustment method in any of the above method embodiments and to implement the functions of the modules in the screen brightness adjustment device in the above embodiments.

[0217] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0218] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods of the various embodiments of this application.

[0219] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A screen brightness adjustment method, applied to a display device, characterized in that, include: Obtain the first reflectance brightness data of the display device in the current environment; The current environment type of the display device is determined based on the first reflective brightness data, and the environment type includes a darkroom environment and a non-darkroom environment; When the current environment of the display device is a darkroom environment, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to the first brightness weighting coefficient to obtain the target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data; wherein, the first brightness weighting coefficient is the ratio of the minimum screen brightness data of the display device to the maximum screen peak brightness data of the display device; When the environment in which the display device is currently located is a non-dark room environment, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to the second brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data; wherein, the second brightness weighting coefficient is the ratio of the target screen peak brightness data of the display device to the maximum screen peak brightness data of the display device; the target screen peak brightness data is the product of the screen peak brightness ratio of the display device and the first reflective brightness data.

2. The method according to claim 1, characterized in that, The step of adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to the first brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data, includes: Obtain the initial backlight brightness data corresponding to the current display screen on the display device; The target backlight brightness data is obtained by multiplying the initial backlight brightness data with the first brightness weighting coefficient, so that the display device can adjust the currently displayed screen brightness based on the target backlight brightness data.

3. The method according to claim 1, characterized in that, The step of adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to the second brightness weighting coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the currently displayed screen based on the target backlight brightness data, includes: Obtain the initial backlight brightness data corresponding to the current display screen on the display device; The peak brightness ratio of the display device is obtained based on the first reflected brightness data. The target screen peak brightness data of the display device is obtained by multiplying the screen peak brightness ratio by the first reflected brightness data. The ratio between the target screen peak brightness data and the maximum screen peak brightness data of the display device is calculated as a second brightness weighting coefficient; The target backlight brightness data is obtained by multiplying the initial backlight brightness data with the second brightness weighting coefficient, so that the display device can adjust the current screen brightness based on the target backlight brightness data.

4. The method according to claim 2 or 3, characterized in that, The step of obtaining the initial backlight brightness data corresponding to the current display screen on the display device includes: The first backlight brightness data corresponding to the current display screen is calculated based on the pixel brightness characteristics of the current display screen on the display device. The first backlight brightness data includes at least one backlight brightness value. The backlight brightness adjustment parameters of the current display screen are obtained based on the first backlight brightness data; Adjust the backlight brightness value that is less than the average brightness value of the current display screen in the first backlight brightness data according to the backlight brightness adjustment parameters to obtain the second backlight brightness data; The second backlight brightness data is adjusted according to the limiting parameters of the display device under different brightness levels to obtain the initial backlight brightness data corresponding to the current display screen; or, The first backlight brightness data corresponding to the current display screen is calculated based on the pixel brightness characteristics of the current display screen on the display device. The first backlight brightness data includes at least one backlight brightness value. The sum of the first backlight data is calculated by summing all the backlight brightness values ​​in the first backlight brightness data. Calculate the ratio between the first sum of backlight data and the maximum sum of backlight data when the backlight of the display device is fully lit; Based on the limiting parameters of the display device at different brightness levels, obtain the limiting factor corresponding to the ratio value; The first backlight brightness data is adjusted according to the limiting factor to obtain the initial backlight brightness data corresponding to the current display screen.

5. The method according to claim 4, characterized in that, The step of obtaining the backlight brightness adjustment parameters of the current display screen based on the first backlight brightness data includes: The sum of the first backlight data is calculated by summing all the backlight brightness values ​​in the first backlight brightness data. The first ratio between the sum of the first backlight data and the maximum sum of backlight data when the backlight of the display device is fully lit is calculated and used as the backlight brightness adjustment parameter of the current display screen.

6. The method according to claim 5, characterized in that, The step of adjusting the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen according to the backlight brightness adjustment parameters to obtain the second backlight brightness data includes: The first ratio value is compared with a preset first threshold and a second threshold respectively, and the first threshold is greater than the second threshold; When the first ratio value is greater than the first threshold, the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen is multiplied by a preset first coefficient to obtain the second backlight brightness data. When the first ratio value is less than or equal to the first threshold and greater than the second threshold, the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the current display screen is multiplied by a preset second coefficient to obtain the second backlight brightness data.

7. The method according to claim 4, characterized in that, The step of adjusting the second backlight brightness data according to the limiting parameters of the display device under different brightness levels to obtain the initial backlight brightness data corresponding to the current display screen includes: Calculate the sum of the second backlight data corresponding to the second backlight brightness data; Calculate a second ratio between the second sum of backlight data and the maximum sum of backlight data when the backlight of the display device is fully lit; Based on the limiting parameters of the display device at different brightness levels, obtain the limiting factor corresponding to the second ratio value; The second backlight brightness data is adjusted according to the limiting factor, and the adjusted second backlight brightness data is used as the initial backlight brightness data corresponding to the current display screen.

8. The method according to claim 1, 2, 3, 5, 6, or 7, characterized in that, The step of obtaining the first reflectance brightness data of the display device in the current environment includes: Obtain the illuminance value of the ambient light received by the display device in the current environment; The first reflected brightness data of the display device in the current environment is calculated based on the illuminance value.

9. The method according to claim 1, 2, 3, 5, 6, or 7, characterized in that, The step of determining the current environment type of the display device based on the first reflectance brightness data includes: The first reflectance data is compared with a preset second reflectance data, where the second reflectance data is a critical value for distinguishing between a darkroom environment and a non-darkroom environment. When the first reflective brightness data is less than the preset second reflective brightness data, the current environment type of the display device is determined to be a darkroom environment; When the first reflective brightness data is greater than or equal to the preset second reflective brightness data, the current environment type of the display device is determined to be a non-dark room environment.

10. The method according to claim 1, 2, 3, 5, 6, or 7, characterized in that, The screen peak brightness ratio is used to reflect the human eye's ability to perceive the brightness difference between the peak brightness data of the display device and the first reflected brightness data of the display device in the current environment.

11. A screen brightness adjustment device, applied to a display device, characterized in that, include: A reflectance brightness acquisition module is used to acquire first reflectance brightness data of the display device in the current environment; An environment detection module is used to determine the current environment type of the display device based on the first reflective brightness data. The environment type includes a darkroom environment and a non-darkroom environment. The first screen brightness adjustment module is used to adjust the initial backlight brightness data corresponding to the current display screen on the display device according to a first brightness weighting coefficient when the current environment of the display device is a dark room environment, so as to obtain target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data; wherein, the first brightness weighting coefficient is the ratio of the lowest screen brightness data of the display device to the maximum screen peak brightness data of the display device; The second screen brightness adjustment module is used to adjust the initial backlight brightness data corresponding to the current display screen on the display device according to a second brightness weighting coefficient when the current environment of the display device is a non-dark room environment, so as to obtain target backlight brightness data, so that the display device adjusts the current screen brightness based on the target backlight brightness data; wherein, the second brightness weighting coefficient is the ratio of the target screen peak brightness data of the display device to the maximum screen peak brightness data of the display device; the target screen peak brightness data is the product of the screen peak brightness ratio of the display device and the first reflective brightness data.

12. A display device, characterized in that, include: At least one processor; And a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1-10.

13. A computer storage medium, characterized in that, The computer storage medium stores instructions or programs that, when executed by a display device, cause the display device to perform the method as described in any one of claims 1-10.

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