Screen brightness adjusting method and device, display equipment and storage medium

Abstract

The invention relates to the technical field of display, and relates to a screen brightness adjusting method and device, display equipment and a storage medium. The screen brightness adjusting method is applied to the display equipment and comprises the following steps: acquiring first reflection brightness data of the display equipment in a current environment; judging the current environment type of the display equipment based on the first reflection brightness data; when the current environment type of the display equipment is a darkroom environment, adjusting initial backlight brightness data corresponding to a current display picture on the display equipment according to the first brightness weight coefficient; and when the current environment type of the display equipment is a non-darkroom environment, adjusting initial backlight brightness data corresponding to a current display picture on the display equipment according to a second brightness weight coefficient to obtain target backlight brightness data, so that the display equipment adjusts the current display screen brightness based on the target backlight brightness data. Therefore, the screen brightness is adjusted by considering the environmental reflection brightness.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a screen brightness adjustment method, device, display equipment and storage medium. Background Art

[0002] With the development of video technology, in order to improve the display effect, LCD monitors with multi-zone backlight drive systems are becoming more and more popular in the market. When improving the display effect of multi-zone backlight drive LCD monitors, the impact of backlight power consumption will also be considered. For example, a brightness adjustment algorithm is integrated into the internal chip of the LCD monitor. The brightness adjustment algorithm adjusts the received backlight data based on the backlight data received by the LCD monitor and the data when the backlight is fully lit. The display driver chip lights up the display backlight partition according to the adjusted backlight data.

[0003] The inventors found in the process of implementing the embodiments of the present application that when viewing a display in a darker environment, the brightness of the ambient area is relatively dim. If the display screen is at peak brightness, a strong contrast between light and dark will be formed with the dim ambient area, which is likely to cause damage to the eyes. Therefore, how to adjust the peak brightness of the screen by considering the reflected brightness of the environment is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present application provide a screen brightness adjustment method, apparatus, display device and storage medium, which can solve the technical problem of how to adjust the screen brightness by taking into account the reflected brightness of the environment.

[0005] To solve the above technical problems, a technical solution adopted in the implementation mode of the present application is: to provide a screen brightness adjustment method, which is applied to a display device, and the screen brightness adjustment method includes: obtaining first reflection brightness data of the display device in a current environment; judging the type of environment in which the display device is currently located based on the first reflection brightness data, and the environment type includes a darkroom environment and a non-darkroom environment; when the type of environment in which the display device is currently located is a darkroom environment, adjusting the initial backlight brightness data corresponding to the current display picture on the display device according to a first brightness weight 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 first brightness The brightness weight 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 current environment type of the display device is a non-darkroom environment, the initial backlight brightness data corresponding to the current display picture on the display device is adjusted according to the second brightness weight 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; wherein, the second brightness weight 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 reflection brightness data.

[0006] Optionally, the initial backlight brightness data corresponding to the current display picture on the display device is adjusted according to the first brightness weight 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, including: obtaining the initial backlight brightness data corresponding to the current display picture on the display device; calculating the product of the initial backlight brightness data and the first brightness weight 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, the initial backlight brightness data corresponding to the current display picture on the display device is adjusted according to the second brightness weight 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, including: obtaining the initial backlight brightness data corresponding to the current display picture on the display device; obtaining the screen peak brightness ratio of the display device according to the first reflection brightness data; calculating 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; 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 weight coefficient; calculating the product of the initial backlight brightness data and the second brightness weight 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.

[0008] Optionally, the obtaining of initial backlight brightness data corresponding to the current display picture on the display device includes: calculating first backlight brightness data corresponding to the current display picture according to pixel brightness characteristics of the current display picture on the display device, the first backlight brightness data including at least one backlight brightness value; obtaining a backlight brightness adjustment parameter of the current display picture according to the first backlight brightness data; adjusting a backlight brightness value in the first backlight brightness data that is less than an average brightness value of the current display picture according to the backlight brightness adjustment parameter to obtain second backlight brightness data; adjusting the second backlight brightness data according to a limiting parameter of the display device at different brightnesses to obtain the initial backlight brightness data corresponding to the current display picture;

[0009] Alternatively, first backlight brightness data corresponding to the current display picture on the display device is calculated based on the pixel brightness characteristics of the current display picture, the first backlight brightness data including at least one backlight brightness value; all backlight brightness values ​​in the first backlight brightness data are summarized to calculate a first backlight data sum of the first backlight brightness data; a 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 is calculated; a limiting factor corresponding to the ratio is obtained based on limiting parameters of the display device at different brightnesses; the first backlight brightness data is adjusted based on the limiting factor to obtain initial backlight brightness data corresponding to the current display picture.

[0010] Optionally, obtaining the backlight brightness adjustment parameter of the current display screen based on the first backlight brightness data includes: summarizing all backlight brightness values ​​in the first backlight brightness data to calculate a first backlight data sum of the first backlight brightness data; calculating a first ratio value 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.

[0011] Optionally, adjusting the backlight brightness value in the first backlight brightness data that is smaller than the average brightness value of the currently displayed image 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, the first threshold being 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 smaller than the average brightness value of the currently displayed image 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 smaller than the average brightness value of the currently displayed image by a preset second coefficient to obtain the second backlight brightness data.

[0012] Optionally, the second backlight brightness data is adjusted according to the limiting parameters of the display device at different brightnesses to obtain the initial backlight brightness data corresponding to the current display picture, including: calculating the sum of the second backlight data corresponding to the second backlight brightness data; calculating the second ratio value between the sum of the second backlight data and the maximum sum of the backlight data corresponding to the backlight of the display device when the backlight is fully lit; according to the limiting parameters of the display device at different brightnesses, obtaining the limiting factor corresponding to the second ratio value; 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 picture.

[0013] Optionally, obtaining the first reflection 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 reflection brightness data of the display device in the current environment according to the illuminance value.

[0014] Optionally, determining the type of environment in which the display device is currently located based on the first reflection brightness data includes: comparing the first reflection brightness data with preset second reflection brightness data, the second reflection brightness data being a reflection brightness critical value for distinguishing a darkroom environment from a non-darkroom environment; when the first reflection brightness data is less than the preset second reflection brightness data, determining that the type of environment in which the display device is currently located is a darkroom environment; when the first reflection brightness data is greater than or equal to the preset second reflection brightness data, determining that the type of environment in which the display device is currently located 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 reflection brightness data of the display device in the current environment.

[0016] In order to solve the above technical problems, another technical solution adopted in the implementation mode of the present application is: to provide a screen brightness adjustment device, which is applied to a display device, and the screen brightness adjustment device includes: a reflection brightness acquisition module, which is used to obtain first reflection brightness data of the display device in the current environment; an environment detection module, which is used to judge the current environment type of the display device based on the first reflection brightness data, and the environment type includes a darkroom environment and a non-darkroom environment; a 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 weight 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 can adjust the current display screen brightness based on the target backlight brightness data. adjustment; wherein the first brightness weight 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; a second screen brightness adjustment module is used to adjust the initial backlight brightness data corresponding to the current display picture on the display device according to the second brightness weight coefficient when the environment type of the display device is currently in a non-darkroom environment, and obtain the target backlight brightness data, so that the display device adjusts the current displayed screen brightness based on the target backlight brightness data; wherein the second brightness weight 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 reflection brightness data.

[0017] To solve the above technical problems, another technical solution adopted in the implementation mode of the present application is: providing a display device, comprising: 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, and the instructions are executed by the at least one processor so that the at least one processor can execute the method as described above.

[0018] To solve the above technical problems, another technical solution adopted in the implementation of the present application is: providing a computer storage medium, wherein the computer storage medium stores instructions or programs, and when the instructions or programs are executed by a display device, the display device executes the method as described above.

[0019] Different from the related art, the embodiments of the present application provide a screen brightness adjustment method, device, display device and storage medium. The screen brightness adjustment method is applied to the display device. The method obtains first reflection brightness data of the display device in the current environment; based on the first reflection brightness data, the type of environment in which the display device is currently located is determined, and the environment type is divided into a darkroom environment and a non-darkroom environment; when the current environment type 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 weight 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; the first brightness weight 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, that is, the first brightness weight coefficient is proportional to the minimum screen brightness data and inversely proportional to the maximum screen peak brightness data, and the first brightness weight coefficient is affected Under the common constraints of the minimum screen brightness data and the maximum screen peak brightness data of the display device, the initial backlight brightness data of the current display picture is adjusted by using the first brightness weight coefficient, so that the current screen display brightness can be appropriately reduced in a dark room without making the screen display brightness too dark so that the user cannot see the display picture clearly, and strong light-dark contrast can be avoided, which can reduce the discomfort of the user watching the display picture in a dark room environment; when the current environment type of the display device is a non-dark room environment, the initial backlight brightness data corresponding to the current display picture on the display device is adjusted according to the second brightness weight coefficient to obtain the target backlight brightness data, so that the display device adjusts the current display screen brightness based on the target backlight brightness data; wherein the second brightness weight 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, and the target screen peak brightness data is the product of the screen peak brightness ratio of the display device and the first reflection brightness data;The second brightness weight coefficient is positively correlated with the screen peak brightness ratio of the display device and the current first reflection brightness data, and negatively correlated with the maximum screen peak brightness data of the display device. When the ambient reflected light becomes increasingly strong, the strong light superimposed by the ambient light and the screen display light is likely to cause fatigue and dizziness in the human eye. At this time, the second brightness weight coefficient will not only be adjusted according to the ambient light (first reflection brightness data), but will also be adjusted synchronously according to the screen peak brightness ratio of the display device. The screen peak brightness ratio is related to the display screen light of the display device. At this time, the second brightness weight coefficient is also subject to the constraints of the three parameters of the screen peak brightness ratio, the first reflection brightness data and the maximum screen peak brightness, which can improve the strong light superimposed by the strong ambient light and the screen display light, causing uncomfortable viewing experience. At the same time, the product of the screen peak brightness ratio and the first reflection brightness data is the target screen peak brightness data, which can characterize the brightness performance of the display device under different ambient lights, can ensure the contrast of the screen display picture, and can avoid the problem of unclear picture content caused by the attenuation of the screen brightness and the dimming adjustment of the current display picture brightness. ;

[0020] In summary, the implementation method provided in the present application provides two dimming strategies for the display device in a darkroom environment and a non-darkroom environment, respectively. In a darkroom environment, the screen brightness of the display device is set by considering the minimum screen brightness data and the maximum screen peak brightness data of the display device. In a non-darkroom environment, the screen brightness of the display device is set by considering the ambient light of the environment in which the display device is located, the screen peak brightness ratio and the maximum screen peak brightness data. These two dimming strategies can adaptively adjust the screen brightness so that the screen display brightness and the ambient reflection brightness are maintained within a viewing experience range that is more comfortable for the human eye, avoiding strong contrast between light and dark, and providing users with a better visual viewing experience while protecting the eyes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0022] Figure 1 is a schematic diagram of a peak algorithm brightness curve provided in an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of white window images of different proportions provided in an embodiment of the present application;

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

[0025] Figure 4 is a flowchart of a screen brightness adjustment method provided in an embodiment of the present application;

[0026] Figure 5 is a flowchart of a method for obtaining first reflection brightness data of a display device in a current environment provided by an embodiment of the present application;

[0027] Figure 6 is a flowchart of a method for determining the type of environment in which a display device is currently located based on first reflection brightness data provided by an embodiment of the present application;

[0028] Figure 7 It is a schematic diagram of a curve of screen peak brightness ratios that are comfortable to human eyes when the display device displays only a pure white picture at different reflection brightnesses provided by an embodiment of the present application;

[0029] Figure 8 It is a flowchart of a method provided in an embodiment of the present application for adjusting initial backlight brightness data corresponding to a current display screen on a display device according to a first brightness weight coefficient to obtain target backlight brightness data, so that the display device adjusts the brightness of the current display screen based on the target backlight brightness data;

[0030] Fig. 9 It is a flowchart of a method provided in an embodiment of the present application for adjusting the initial backlight brightness data corresponding to the current display picture on the display device according to the second brightness weight 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;

[0031] Fig.10 It is a flowchart of a method for obtaining initial backlight brightness data corresponding to a current display screen on a display device provided by an embodiment of the present application;

[0032] Fig.11 is a flowchart of a method for obtaining initial backlight brightness data corresponding to a current display screen on a display device provided by another embodiment of the present application;

[0033] Fig.12 is a schematic diagram of a display screen on a display device provided in an embodiment of the present application;

[0034] Fig.13 is a schematic diagram of initial backlight brightness data corresponding to a portion of a display screen on a display device provided in an embodiment of the present application;

[0035] Fig.14 is a structural schematic diagram of a screen brightness adjustment device provided in an embodiment of the present application;

[0036] Fig.15 A schematic diagram of the hardware structure of a display device for executing a screen brightness adjustment method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

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

[0039] Although the device schematic diagram is divided into functional modules and the flowchart shows a logical sequence, in some cases, the steps may be divided differently from the modules in the device or may be executed in an order different from that shown in the flowchart.

[0040] When an element is referred to as being “connected to” another element, it can be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0041] The terms "first", "second", etc. 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 the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0042] In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the previously and subsequently associated objects are in an "or" relationship.

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

[0044] In the prior art, a display device has a liquid crystal display, which may have a plurality of pixels distributed in an array, and each pixel may emit light by relying on the light of a backlight module in the liquid crystal display.

[0045] Usually, a brightness adjustment algorithm is integrated in the internal chip of the LCD display. The brightness adjustment algorithm adjusts the received backlight data according to the backlight data received by the LCD display and the data when the backlight is fully lit. The LCD display driver chip lights up the backlight partition of the LCD display according to the adjusted backlight data. The backlight partition of the LCD display is to divide the screen into several partitions with the same length and width along the width and length directions of the LCD screen.

[0046] Image partitioning can be performed based on the backlight partitioning of the screen of the liquid crystal display. For example, if the screen is divided into several backlight partitions along the length direction of the screen, the image can be divided into the same number of image partitions along the length direction of the image. If the screen is divided into several backlight partitions along the width direction of the screen, the image can be divided into the same number of image partitions along the width direction of the image. If the screen is divided into M*N backlight partitions, the image can be divided into M*N image partitions accordingly, and so on. In the following examples, the screen is divided into M*N backlight partitions and the image is divided into M*N image partitions as an example.

[0047] The above M and N may be positive integers, for example, M is 20, N is 24, and the image is divided into 480 image partitions of 20*24.

[0048] The image partitions and the backlight partitions have a one-to-one correspondence, and the image partitions and the backlight partitions at the same position have a corresponding relationship, for example, the image partition at the third column of the first row and the backlight partition at the third column of the first row have a corresponding relationship.

[0049] In one example, the LCD display can be an LCD display with 480 backlight partitions. It is a display that uses partition control technology to divide the backlight source into 480 independent areas. Each area can adjust the brightness independently. The brightness and color of each area can be adjusted in a targeted manner according to the brightness and color changes of the image to achieve higher contrast and more accurate color performance. The LCD display can control the brightness of the corresponding backlight partition in the backlight module by receiving 480 backlight data sent by the host computer. In order to consider the power consumption limitation factor, the internal chip of the LCD display can be integrated as follows: Figure 1 The peak brightness algorithm curve shown in the figure can be used to adjust the brightness of the backlight partition to maximize the display brightness / contrast while meeting the power consumption limit of the display hardware. The peak brightness algorithm can be used to evaluate the brightness performance of the backlight module of the liquid crystal display, so that the image has better visual effects and richer details.

[0050] Specifically, the internal chip of the liquid crystal display calculates the sum of the current backlight data corresponding to the 480 backlight data according to the received 480 backlight data, and calculates the sum of the maximum backlight data corresponding to the 480 backlight data when the backlight is fully lit, and then calculates the sum of the current backlight data corresponding to the 480 backlight data according to the received 480 backlight data. Figure 1 As shown, it can be determined that the interval range of the current backlight data sum corresponding to the 480 backlight data includes the first interval range: (0, 0.21*the maximum backlight data sum corresponding to the backlight at full brightness), the second interval range: (0.21*the maximum backlight data sum corresponding to the backlight at full brightness, 0.4*the maximum backlight data sum corresponding to the backlight at full brightness) and the third interval range: (0.4*the maximum backlight data sum corresponding to the backlight at full brightness, 1*the maximum backlight data sum corresponding to the backlight at full brightness). When the sum of the current backlight data corresponding to the 480 backlight data is within the first interval range, that is, the sum of the current backlight data <0.21*the sum of the maximum backlight data corresponding to the backlight when it is fully lit, the internal chip of the LCD display will multiply the received 480 backlight data by 1 and send them to the back-end display driver chip to light up the backlight partition of the display; when the sum of the current backlight data corresponding to the 480 backlight data is within the second interval range, that is, 0.21*the sum of the maximum backlight data corresponding to the backlight when it is fully lit <the sum of the current backlight data corresponding to the 480 backlight data <0.4*the sum of the maximum backlight data corresponding to the backlight when it is fully lit, the internal chip of the LCD display will operate as follows: Figure 1 The curve with a slope of -2.105 shown processes the 480 backlight data received, and after processing, sends them to the back-end display driver chip to light up the backlight partition of the display; when the current total backlight data corresponding to the 480 backlight data is within the third interval range mentioned above, that is, the current total backlight data corresponding to the 480 backlight data > 0.4* the maximum total backlight data corresponding to the full backlight, the internal chip of the LCD display multiplies the received 480 backlight data by 0.6 and sends them to the back-end display driver chip to light up the backlight partition of the display.

[0051] The sum of current backlight data corresponding to the 480 backlight data refers to the fact that the liquid crystal display is divided into 480 partitions, each partition has its corresponding backlight brightness, and the result of the sum operation of the 480 backlight brightnesses is the sum of current backlight data corresponding to the 480 backlight data. The sum of maximum backlight data corresponding to the 480 backlight data when the backlight is fully lit refers to the value obtained by summing the maximum backlight brightness of each partition in the 480 partitions, that is, the product of the number of partitions and the maximum backlight brightness (such as 255) (such as 480*255) is the maximum backlight data sum corresponding to the backlight when it is fully lit. In the backlight partition control of the liquid crystal display, the backlight brightness of each partition can be controlled by PWM (Pulse Width Modulation) technology, that is, the duty cycle (i.e., the ratio of the high level time to the cycle time) of a square wave signal with a fixed frequency is used to control the average voltage or average current of the output signal, thereby achieving the purpose of adjusting the brightness. It should be noted that in the 8-bit binary system, the maximum value is 255 (11111111), that is, an 8-bit PWM signal can represent a brightness value between 0 and 255. Therefore, when the backlight brightness of the backlight partition is set to full brightness, the duty cycle of the PWM signal of each partition is set to 100%, that is, the high level duration of the PWM signal is the entire cycle time, and the corresponding brightness value is 255, which is the maximum brightness value of the backlight brightness of a backlight partition. It should be further noted that in actual LCD displays, the number of backlight partitions, the range of brightness value adjustment, and the accuracy of brightness adjustment may vary depending on the type and brand of display.

[0052] Among them, the above-mentioned basis is as follows Figure 1 The coefficients 0.21 and 0.4 set in the determined interval range are constants determined by experiments and experience, and are used to calculate the peak brightness value of the liquid crystal display in different screen displays, which is limited by the brightness ratio and power consumption limit of the current display screen of the display. The determination of these constants is obtained through experiments and experience. For example, it can be obtained by comprehensively considering factors such as the human eye's perception curve of brightness, the optical properties and electrical properties of the liquid crystal display. It should be noted that in actual applications, these constants may vary depending on the display type, brand and application scenario, and need to be adjusted and optimized according to the specific situation. Figure 1The horizontal axis represents the constant. Specifically, the horizontal axis represents the ratio of the sum of the initial backlight brightness data of the current display screen of the display to the sum of the maximum backlight data when the display backlight is fully lit, that is, the abscissa value on the horizontal axis represents the brightness ratio of the current display screen presented by the display, and the ordinate value on the vertical axis represents the power consumption limit factor corresponding to each brightness ratio, such as 0.6 and 1 are the power consumption limit factors. 0.6 and 1 are also constants determined based on experiments and experience. By multiplying the backlight brightness data corresponding to the current display screen currently detected by the power consumption limit factor corresponding to the vertical axis, the backlight brightness of the current display screen of the display is adjusted so that the display brightness of the current display screen does not exceed the power consumption limit of the display device itself. Among them, for partitioned and non-partitioned displays, Figure 1 The corresponding horizontal axes are the ratios of the sum of the initial backlight brightness data of the current display screen of the display to the sum of the maximum backlight data when the display backlight is fully lit. If it is a partitioned display, the sum of the initial backlight brightness data of the display screen is the value obtained by summing the backlight brightness values ​​of all partitions, and the sum of the maximum backlight data when the backlight is fully lit is the value obtained by multiplying the number of partitions by 255. If it is a non-partitioned display, the sum of the initial backlight brightness data of the display screen can be the backlight brightness value of the current display screen, and the sum of the maximum backlight data when the backlight is fully lit can be 255.

[0053] The inventor found in the process of implementing the embodiment of the present application that when the display device is viewed in a dark environment, the brightness of the environment area is relatively dim. If the display device screen is at the peak brightness of the screen at this time, a strong contrast between light and dark will be formed with the dim environment area, which is easy to cause damage to the eyes. At the same time, if the display device screen is manually adjusted to a low brightness by the user in a dim environment, the screen brightness needs to be re-adjusted when the display device is switched from a dim environment to a bright environment. The existing screen brightness adjustment method is generally divided into two categories: backlight adjustment and liquid crystal pixel compensation adjustment. Although the backlight adjustment scheme is difficult to implement, it is more accurate, has higher adjustment accuracy and better effect than the liquid crystal pixel compensation adjustment scheme. The principle of the general backlight adjustment scheme is to adjust the duty cycle by adjusting the current, thereby controlling the backlight brightness, so that the adjusted backlight brightness is mapped to obtain the target screen display brightness. In the adjustment of the current value by the backlight adjustment scheme, the existing schemes on the market only consider the brightness contrast of the display screen of the current display device, the ambient reflection brightness, or a combination of the two, and do not provide a brightness adjustment scheme that is more suitable for adaptive switching between light and dark environments.

[0054] To this end, the inventors thought of using ambient light and the peak screen brightness of the display device under different ambient lights to develop a brightness adjustment plan for the backlight module. In order to explore the desirable range of the peak screen 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 in the preset pure black background display window. Figure 2 As shown, there are twenty pure black display screen windows, each of which has the same total area, and the proportion of the white window screen in the twenty windows is 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 display screen window is used to simulate the display screen of the display, and the white window screen in the experiment is used to characterize that the display screen in the display device is a pure white screen. The pure white screen is selected as the current display screen of the display device in order to make the display device map the backlight brightness to the screen brightness when the backlight brightness is determined. At this time, the screen brightness is closest to the lossless backlight 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 screen (that is, the screen peak brightness) when the display device displays other content screens (non-all-white screens) under the same backlight brightness drive. Because a pure white display image can make the display screen reach the theoretical global maximum brightness, that is, a white window image can make the display screen theoretically reach the maximum screen brightness corresponding to the window image when the corresponding backlight is turned on.

[0056] In the inventor's experiment, the above twenty white window images with different proportions were subjected to the backlight extraction step of the LocalDimming algorithm to obtain an initial backlight brightness data matrix, and the initial backlight brightness data matrix was subjected to the backlight extraction step of the LocalDimming algorithm to obtain an initial backlight brightness data matrix. Figure 1 The backlight data matrix obtained after the peak brightness algorithm curve shown in the figure is sent to the back-end LCD driver chip to light up the corresponding backlight partition, and then the color analyzer is used to measure the brightness of the white window images of 20 different proportions at this time, and the following can be obtained: Figure 3 The measured peak brightness curve is shown in FIG. 8 . The color analyzer may be a CA-410 instrument or other suitable brightness acquisition device. Figure 3 The horizontal axis in the figure represents the proportion of the white window image. Figure 3 The vertical axis is the brightness value achieved by the LCD display when displaying white window images at different ratios, and the unit is nits.

[0057] from Figure 3The approximate desirable range of the peak brightness of the screen of the LCD can be seen in the figure, and it can be obtained that the maximum peak brightness of the LCD is 1315 nits, and the corresponding white window ratio is 40%. If the display device is displayed and viewed in a darker environment, when the screen of the LCD has a peak brightness of 1315 nits, the screen brightness of the display device will form a strong contrast between light and dark with the dim wall background area, which can easily reduce the user's viewing experience and cause damage to the eyes. Therefore, further, the inventors considered the need to simultaneously consider the maximum screen peak brightness and the minimum screen brightness of the display device under the premise of utilizing ambient light and the peak screen brightness of the display device under different ambient lights, so as to formulate a brightness adjustment scheme for the backlight module as a common consideration factor.

[0058] The inventor believes that the implementation method provided in the present application can adaptively adjust the backlight data after the peak brightness algorithm curve is processed, so that the peak brightness of the screen and the wall reflection brightness are always maintained within a relatively comfortable viewing experience range, avoiding the situation of strong contrast between light and dark, and providing users with a better viewing experience while protecting the eyes; at the same time, the implementation method provided in the present application combines the maximum screen peak brightness with the minimum screen brightness, as well as the screen peak brightness of the display device under different ambient light, so that the display device can adaptively switch the dimming strategy in light and dark environments, further improving the user experience.

[0059] Therefore, the following embodiment provides a method for adjusting screen brightness. The executor of the method for adjusting screen brightness is generally an electronic device with certain computing capabilities, such as a computer device. In some possible implementations, the method for adjusting screen brightness can be implemented by a processor calling computer-readable instructions stored in a memory.

[0060] See also Figure 4 , Figure 4 It is a flow chart of the screen brightness adjustment method provided in an embodiment of the present application.

[0061] The present application provides a screen brightness adjustment method, which is applied to a display device. The screen brightness adjustment method includes:

[0062] S1. Obtain first reflection brightness data of a display device in a current environment.

[0063] The first reflection brightness data is used to reflect the magnitude of the reflection brightness of the current environment in which the display device is located. In one implementation, specifically, an illumination sensor may be arranged in front of the screen of the display device, and the illumination value of the ambient light in the current environment of the display device may be obtained by the illumination sensor, and the ambient light illumination value may be used as the first reflection brightness data.

[0064] See also Figure 5 , Figure 5 1 is a flow chart of a method for obtaining first reflection brightness data of a display device in a current environment provided by an embodiment of the present application. In some embodiments, the above S1, obtaining first reflection brightness data of a display device in a current environment, includes:

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

[0066] Specifically, an instrument can be installed in front of the screen of the display device to detect the incident light flux of the screen of the display device in real time. The ratio of the incident light flux received by the screen in the current environment to the area of ​​the screen can be used as the illumination value.

[0067] S12. Calculate first reflection brightness data of the display device in the current environment according to the illumination value.

[0068] The product of the above-mentioned ambient light illumination value and the reflectivity of the display device can be used as the first reflection brightness data.

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

[0070]

[0071] Wherein, ρ is the background reflectivity of the environment in which the display device is located, which is generally 0.6 to 0.7. This value range can cover the common placement scenarios of the display device, such as the background of the display device being a wall, a bookcase, a background board, etc., that is, the background reflectivity of the display device under these common backgrounds ranges from [0.6, 0.7]; E is the ambient light illuminance value collected by the illuminance sensor; L rf It is the first reflection brightness data, in nits.

[0072] S2. Determine the type of environment in which the display device is currently located based on the first reflection brightness data.

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

[0074] In a specific implementation, the first reflection brightness data can be compared with the preset second reflection brightness data to determine whether the environment in which the display device is currently located is a darkroom environment. The second reflection brightness data is a reflection brightness threshold value for distinguishing a darkroom environment from a non-darkroom environment. The second reflection brightness data is an indicator for determining whether the environment in which the display device is located is a darkroom environment.

[0075] The darkroom environment requires stable illumination under different external environments, the internal light source needs to be turned off or isolated, and the wall and floor reflectivity refer to the Nissan darkroom standard, that is, the wall reflectivity is 60% and the floor reflectivity is 20%.

[0076] The second reflection brightness data may be determined by measuring the illuminance value of the ambient light in the current environment of the display device in a dark room environment, and reference may be made to the calculation method of the first reflection brightness data described above.

[0077] See also Figure 6 , Figure 6 It is a flowchart of a method for determining the type of environment in which a display device is currently located based on first reflection brightness data provided in an embodiment of the present application.

[0078] In some embodiments, the above-mentioned S2, determining the type of environment in which the display device is currently located based on the first reflection brightness data, may specifically include:

[0079] S21, comparing the first reflection brightness data with the preset second reflection brightness data, wherein the second reflection brightness data is a reflection brightness threshold value for distinguishing a darkroom environment from a non-darkroom environment.

[0080] It should be noted that the threshold of the reflection brightness in the darkroom environment in the embodiment of the present application, that is, the value of the second reflection brightness data, is 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, determine that the current environment type of the display device is a darkroom environment.

[0082] S23: When the first reflection brightness data is greater than or equal to the preset second reflection brightness data, determine that the current environment type of the display device is a non-darkroom environment.

[0083] Since the second reflection brightness data is an indicator for defining whether the environment in which the display device is located is a darkroom environment, and the first reflection brightness data is proportional to the illuminance value of the ambient light, that is, the larger the first reflection brightness data is, the larger the illuminance value of the ambient light in which the display device is currently located. Therefore, if the first reflection brightness data is less than the second reflection brightness data, it is considered that the environment in which the display device is currently located is a darkroom environment; if the first reflection brightness data is greater than or equal to the second reflection brightness data, it is considered that the environment in which the display device is currently located is not a darkroom environment, that is, the type of environment in which the display device is currently located is a non-darkroom environment. For example, if the preset second reflection brightness data is 2nits, if the calculated first reflection brightness data is 1nits, it means that the environment in which the display device is currently located is a darkroom environment, and if the calculated first reflection brightness data is 5nits, it means that the environment in which the display device is currently located is not a darkroom environment; in this example, the second reflection brightness data of 2nits is data that can be obtained by simulation experiments based on a pure darkroom environment.

[0084] S3. When the current environment type 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 weight 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.

[0085] The first brightness weight 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.

[0086] If the current environment of the display device is a dark room environment, it means that the reflected brightness of the environment where the user is located is darker. At this time, in order to protect the user's eyes from damage and improve the user's experience, the screen brightness of the display device needs to be set to be darker accordingly, and the first brightness weight coefficient is a coefficient less than 1. The initial backlight brightness data corresponding to the current display screen of the display device is adjusted according to the coefficient, and the backlight brightness data corresponding to the current display screen can be appropriately reduced, so that the backlight brightness data adjusted by the coefficient is transmitted to the backlight module to drive the backlight source of the display device, so that the display device adjusts the current display screen brightness based on the target backlight brightness data, so that the current display screen brightness can be adjusted to the target screen brightness suitable for a dark room environment and comfortable for the human eye.

[0087] The minimum screen brightness data is the screen brightness that is comfortable for the human eye corresponding to the reflection brightness value in a dark room environment. It should be noted that the minimum screen brightness data may have different settings due to different models and brands of different display devices. For the same display device, the minimum screen brightness data may also have different numerical settings because the display device has different display modes (such as reading mode, anti-blue light mode, night mode, etc.), which is not specifically limited in this embodiment.

[0088] In one example, in order to obtain the relationship between different reflection brightness and the screen brightness that is more comfortable for human eyes to watch, in a light box environment, experiments are conducted to obtain screen brightness data that is more comfortable for human eyes to watch under different reflection brightness, and curves are drawn and fitted. Figure 7 , Figure 7 is a schematic diagram of a curve of screen peak brightness ratio under different reflection brightness provided by an embodiment of the present application. Specifically, Figure 7 Shown in FIG. 1 is a curve of screen peak brightness ratios that are comfortable for the human eye under different reflective brightnesses when the display device displays only a pure white image. The curve is drawn by the inventor based on the collected data after conducting experiments. Figure 7 The horizontal axis on the middle horizontal axis represents the value of the reflected brightness, in nits. Figure 7The vertical axis on the middle vertical axis represents the value of the screen peak brightness ratio corresponding to the reflected brightness value. The screen peak brightness ratio value is the ratio between the screen peak brightness value of the current display screen of the display device and the background ambient light reflected brightness value of the current environment of the display device (i.e., the first reflected brightness data). Since the units of the screen peak brightness value and the reflected brightness value are both nits, the screen peak brightness ratio obtained by dividing the two has no units. It should be noted that Figure 7 The relationship curves in the figure are obtained through experimental tests and are only used as reference examples. In practical applications, these curves may vary depending on the type, brand and application scenario of the display device, and the embodiments of the present application do not specifically limit this.

[0089] like Figure 7 As shown in , when the experimental environment is a darkroom simulation scene and the display screen is a pure white screen, that is, when the reflection brightness value in the darkroom environment is 2nits, the screen peak brightness ratio of the display device is close to 10, that is, the screen brightness at this time is close to 20nits, then the minimum screen brightness that makes the human eye comfortable in the darkroom environment corresponding to the display device is 20nits. When the current display screen of the display device is a pure white screen, if it is higher than the minimum screen brightness, it will cause a strong contrast between light and dark in the human eye. It should be noted that in this example, the pure white screen is selected as the current display screen of the display device in the experiment so that when the display device is mapped from the backlight brightness to the screen brightness when the backlight brightness is determined, the screen brightness at this time is closest to the lossless backlight 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 screen (that is, the screen peak brightness) when the display device displays other content screens (non-all-white screens) under the same backlight brightness drive.

[0090] Specifically, in this example, the value of the minimum screen brightness data can be set to the ideal screen brightness when the display device presents a pure white screen in a dark room environment type. Because there is a mapping relationship between the screen brightness and the backlight brightness, the maximum screen peak brightness corresponds to the maximum backlight brightness (at this time, when the display screen of the display device is a pure white screen, 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 in the dark room environment (that is, the minimum screen brightness data) and the backlight brightness data matched by the minimum screen brightness data] is equal 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 the mapping relationship of the equivalent ratio, in order to make the current pure white display screen 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 of the minimum screen brightness data to the maximum screen peak brightness] and the maximum backlight brightness data matched by the maximum screen peak brightness. However, in the current In actual applications, the display screen presented by the display device in a darkroom environment is not a pure white screen (that is, even if the backlight brightness reaches the maximum backlight brightness data, the maximum screen peak brightness cannot be reached). Therefore, in actual 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] by the initial backlight brightness data, that is, use the first brightness weight coefficient to adjust the initial backlight brightness data. The influence of the first brightness weight coefficient on the initial backlight brightness data is essentially the influence of the ambient reflected light of the display device in a darkroom environment on the attenuation of the initial backlight brightness data. For example, the target backlight brightness data obtained by multiplying the two can be used as a more suitable backlight brightness for the current display screen in a darkroom environment, that is, the target backlight brightness data is transmitted to the backlight module of the display device, and the display brightness mapped to the display screen after the backlight module is driven to light up reaches the target screen brightness adapted to the darkroom environment.

[0091] In another example, a screen brightness slightly larger than the minimum screen brightness data may be set, such as 30 nits. In other examples, other appropriate screen brightnesses may also be set.

[0092] See also Figure 8 , Figure 8 It is a flow chart of a method provided in an embodiment of the present application for adjusting the initial backlight brightness data corresponding to the current display screen on the display device according to the first brightness weight 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.

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

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

[0095] S32. Calculate the product of the initial backlight brightness data and the first brightness weight 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.

[0096] Specifically, the ratio of the minimum screen brightness data to the maximum screen peak brightness data is calculated to obtain a first brightness weight coefficient. The minimum screen brightness data is the screen brightness value of the display device screen whose reflection brightness in a dark room environment is comfortable for human eyes. In one example, Figure 7 It can be obtained from the curve that when the reflection brightness of the darkroom environment is 2nits, the screen brightness value is close to 20nits. Therefore, in this embodiment, the value of the minimum screen brightness data can be 20nits. The maximum screen peak brightness data refers to the maximum brightness that can be displayed within the safe range of the screen of the display device, which is set for the screen of the display device when it leaves the factory and is a fixed value. Depending on the model of the screen of the display device, the value of its maximum screen peak brightness data is also different, and the embodiment of the present application does not specifically limit this. For example, the maximum screen peak brightness of the display device in the embodiment of the present application can be 1300nits.

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

[0098] It should be noted that Figure 7 The curve of the screen peak brightness ratio that makes the human eye comfortable under different reflection brightness is a curve drawn by the data collected by the inventor after the experiment. Among them, the value of the screen brightness is close to 20nits when the reflection brightness in the above-mentioned dark room environment is 2nits, which is a constant determined by experiments and experience. The determination of these constants is obtained through experiments and experience. For example, it can be obtained by comprehensively considering factors such as the human eye's perception curve of brightness, the optical properties and electrical properties of the liquid crystal display device. In actual applications, these constants may vary depending on the type, brand and application scenario of the display device, and need to be adjusted and optimized according to the specific situation. The embodiments of the present application do not make specific limitations on this.

[0099] Specifically, when the current environment of the display device is a darkroom environment, each of the acquired initial backlight brightness data corresponding to the current display screen is multiplied by the first brightness weight coefficient to obtain the target backlight brightness data, and the screen brightness corresponding to the current display screen of the display device is adjusted based on the target backlight brightness data to achieve the target screen brightness adapted to the darkroom environment. In this way, the display device can have a relatively low display brightness in a darkroom environment, thereby protecting the user's eyes from damage and improving the user's viewing experience.

[0100] S4. When the current environment type of the display device is a non-darkroom environment, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to the second brightness weight 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] Among them, the second brightness weight 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 reflection brightness data. It can be seen that the second brightness weight coefficient is positively correlated with the product of the screen peak brightness ratio of the display device and the first reflection brightness data, and the second brightness weight coefficient is negatively correlated with the maximum screen peak brightness data of the display device.

[0102] Since the maximum screen peak brightness data of the display device is the theoretical value of the maximum screen brightness that can be achieved when the backlight module of the display device outputs at full power, so that a pure white display image is presented on the display screen (because the pure white display image can reach the theoretical global brightest), under normal circumstances, the current display image of the display device is not a pure white display image, and due to power consumption considerations and the overcurrent protection of the hardware of the display device itself, the target screen peak brightness corresponding to the current display image of the display device will not exceed the maximum screen peak brightness of the display device. Therefore, the value of the second brightness weight coefficient is not greater than 1.

[0103] Specifically, the second brightness weight coefficient is used to adjust the initial backlight brightness data corresponding to the current display screen on the display device to obtain target backlight brightness data. The target backlight brightness data is actually the backlight brightness data obtained after the brightness attenuation of the initial backlight brightness data. The reason is that when the current environment type of the display device is a non-darkroom environment, in order to avoid the strong light generated by the superposition of ambient light in the non-darkroom environment and the display screen light to cause damage to the human eye and cause dizziness, it is necessary to appropriately reduce the brightness of the current display screen, but to ensure that the adjusted screen display brightness can clearly see the content in the current display screen. Therefore, the initial backlight brightness data is adjusted using the second brightness weight coefficient that is synchronously constrained by the screen peak brightness ratio and the first reflection brightness data.

[0104] See also Fig. 9 , Fig. 9 It is a flowchart of a method provided in an embodiment of the present application for obtaining a screen peak brightness ratio of a display device according to first reflection brightness data, and adjusting the screen brightness currently displayed by the display device according to the screen peak brightness ratio.

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

[0106] S41, obtaining initial backlight brightness data corresponding to the current display image on the display device.

[0107] S42. Obtain a screen peak brightness ratio of the display device according to the first reflection brightness data.

[0108] Specifically, the first reflection brightness is the reflection brightness of the ambient light in the current environment of the display device. Figure 7 The horizontal axis of the middle curve is the reflection brightness, and the vertical axis is the screen peak brightness ratio that the display device achieves at the corresponding reflection brightness to make the human eye comfortable. Figure 7 The value of the screen peak brightness ratio corresponding to the value of the first reflection brightness data is found by Figure 7 After finding the value of the screen peak brightness ratio corresponding to the value of the first reflected brightness data, multiplying the value of the first reflected brightness data by the corresponding value of the screen peak brightness ratio can obtain the value of the screen peak brightness in the current environment of the display device, that is, obtain 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 perception of the brightness difference between the screen peak brightness data of the display device and the first reflection brightness data of the display device in the current environment.

[0110] In one example, the screen peak brightness ratio may be the ratio of the screen peak brightness value to the reflection brightness value that makes the human eye comfortable. The relationship between the screen peak brightness ratio and the first reflection brightness data may be determined by a human factors experiment. Specifically, the data relationship between the first reflection brightness data and the screen peak brightness ratio of the display device may be obtained by statistically analyzing the background reflection brightness of the display device in various environments and the screen peak brightness of the display device when the display device displays a full white screen under various background reflection brightnesses. For example, the experimental conditions may be set in advance (such as the intensity of the ambient light, the range of reflection brightness, the various environmental conditions that may exist in the display device, the evaluation conditions for the human eye to feel comfortable are set, the people participating in the test are classified, etc.), a large amount of experimental test data is obtained through human factors experiments, and data analysis (such as data fitting, data clustering, etc.) is performed on these experimental test data to determine the relationship between the screen peak brightness ratio and the first reflection brightness data, and the relationship can be solidified by the expression of a formula.

[0111] It should be noted that the screen peak brightness ratio is a parameter that can reflect the human eye's perception of the screen peak brightness of the display device and the reflected brightness of the ambient light in which the display device is currently located. This parameter can represent the human eye's sensitivity to the superposition of the display brightness of the display device's screen brightness and the ambient light brightness. Figure 7 The curve in shows the correlation between the screen peak brightness ratio and various reflection brightnesses that make the human eye feel comfortable, which is measured based on human factors experiments. This curve is only a reference curve for a certain type of display device. For display devices of different specifications, the specific value of the curve will be different, but the general shape and trend of the curve are consistent, that is, when the reflection brightness is darker, a larger value of the screen peak brightness ratio will make it more comfortable for the human eye to watch the display screen of the display device; when the reflection brightness gradually becomes brighter and reaches a certain target threshold, the value of the screen peak brightness ratio will decrease accordingly, which will make it more comfortable for the human eye to watch the display screen of the display device; and when the reflection brightness exceeds the target threshold and then gradually becomes brighter, the value of the screen peak brightness ratio will increase accordingly, which will make it more comfortable for the human eye to watch the display screen of the display device. Among them, the change in the trend of the curve mentioned above has a biological basis, because maintaining high contrast for a long time will excessively damage the human retina, easily causing eye fatigue, dizziness and other feelings, which can lead to vision loss. Over time, it will also damage the visual pigments on the cone cells, causing greater harm to the eyes. Therefore, the display device needs to adjust the contrast in time according to the specific environment when in use; at the same time, during the adjustment process, if the brightness is at a low contrast for a long time, the image cannot maintain a clearer and more eye-catching display effect, and the colors cannot be displayed more vividly and brightly.

[0112] In one embodiment, obtaining the screen peak brightness ratio of the display device according to the first reflection brightness data may specifically include: calculating the screen peak brightness ratio of the display device according to a preset formula combined with the first reflection brightness data. The preset formula may be:

[0113]

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

[0115] In one example, the above formula can be expressed as Figure 7 The curve fitting of the screen peak brightness ratio in the above formula is obtained, so the values ​​of coefficients K1, K2, K3, and K4 in the above formula are fixed, and K1 is 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 Specifically, the value of the first reflection brightness data is substituted into the above formula to obtain the screen peak brightness ratio of the current display device.

[0116] It should be noted that Figure 7 It is a curve of the screen peak brightness ratio that makes the human eye comfortable under different reflection brightness, and is a curve drawn by the inventor based on the collected data after conducting experiments. It can be imagined that in actual applications, the curve of the screen peak brightness ratio that makes the human eye comfortable under different reflection brightness may vary depending on the display device type, brand and application scenario, and needs to be adjusted and optimized according to the specific situation. The embodiment of the present application does not make specific limitations on this. In addition, in the above example, the values ​​of K1, K2, K3, and K4 are solutions obtained by fitting the curve of the screen peak brightness ratio that makes the human eye comfortable under different reflection brightness. Therefore, when the curve of the screen peak brightness ratio that makes the human eye comfortable under different reflection brightness 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 target screen peak brightness data of the display device.

[0118] In one embodiment, since the screen peak brightness ratio itself is defined as the ratio between the value of the screen peak brightness of the current display image of the display device and the value of the background ambient light reflection brightness of the current environment of the display device (i.e., the first reflection brightness data), specifically, the value of the screen peak brightness ratio is multiplied by the value of the first reflection brightness data to obtain the value of the screen peak brightness data.

[0119] It should be noted that the target screen peak brightness data obtained in the above embodiment is the screen brightness data that the display device can achieve when displaying an all-white screen. As long as the currently displayed screen is not an all-white screen, it is impossible to achieve 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, and is used for theoretical calculations to obtain the second brightness weight coefficient.

[0120] S44. 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 weight coefficient.

[0121] The maximum screen peak brightness data refers to the maximum brightness that can be displayed within the safe range of the screen of the display device, which is set by the screen of the display device when it leaves the factory and is a fixed value. Depending on the model of the screen of the display device, the value of the maximum screen peak brightness data is also different. For example, the maximum screen peak brightness of the display device in the embodiment of the present application is 1300nits.

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

[0123] S45. Calculate the product of the initial backlight brightness data and the second brightness weight 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.

[0124] Specifically, when the current environment of the display device is a non-darkroom environment, each of the above-mentioned initial backlight brightness data is multiplied by the second brightness weight coefficient to obtain the target backlight brightness data, and the screen brightness of the display device is adjusted based on the initial backlight brightness data multiplied by the second weight coefficient, so that the display device has a relatively high display brightness in a non-darkroom environment, thereby protecting the user from being able to clearly see the display image in the display device, thereby improving the user's viewing experience.

[0125] See also Fig.10 , Fig.10 It is a flowchart of a method for obtaining initial backlight brightness data corresponding to a current display screen on a display device provided in an embodiment of the present application.

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

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

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

[0129] In one implementation, first backlight brightness data corresponding to the current display screen is calculated based on pixel brightness characteristics of the current display screen on the display device, which can specifically include: partitioning the display screen to obtain 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 as the backlight brightness value corresponding to the partition screen; and summarizing 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 most closely calculate the first backlight brightness data corresponding to the current display picture based on the pixel brightness characteristics of the current display picture, the current display picture can be partitioned according to the partition parameters of the display device in the hardware specifications. For example, if the number of backlight partitions of the display device is 480, the current display picture can be partitioned one-to-one according to the divided areas of the backlight partitions, so that each partitioned picture obtained by the division corresponds completely to a backlight partition.

[0131] The pixel brightness characteristic value may include at least one of a pixel brightness mean value, a pixel brightness median value, a pixel brightness minimum value, a pixel brightness maximum value, and a pixel brightness weighted value.

[0132] In one embodiment, the average pixel brightness, the minimum pixel brightness, and the 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 is the brightness of the i-th pixel in the partitioned picture, n is the total number of pixels contained in the partitioned picture, L1 is the average pixel brightness corresponding to the partitioned picture, L2 is the maximum pixel brightness corresponding to the partitioned picture, and L3 is the minimum pixel brightness corresponding to the partitioned picture.

[0137] Determining the backlight brightness value corresponding to the partitioned screen according to the pixel brightness characteristic value of the partitioned screen may be to use the mean pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to use the median pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to use the minimum pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to use the maximum pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to combine any two or three of the mean pixel brightness, the minimum pixel brightness and the maximum pixel brightness to calculate the pixel brightness weighted value of the partitioned screen as the backlight brightness value corresponding to the partitioned screen. It should be noted that the calculation method of the pixel brightness characteristic value and the backlight brightness value of the partitioned screen can be determined according to the design and application scenario of the liquid crystal display, and at the same time, the hardware characteristics and power consumption limitations of the liquid crystal display can also be considered to achieve balanced backlight control.

[0138] In one embodiment of the present application, the pixel brightness characteristic value may include a pixel brightness weighted value obtained by combining the pixel brightness mean value and the pixel brightness maximum value. The pixel brightness characteristic value that can characterize the pixel brightness characteristics of each partitioned screen is calculated as the backlight brightness value corresponding to the partitioned screen. Specifically, it may include: for each partitioned screen, weighted summing the pixel brightness mean value and the pixel brightness maximum value of the partitioned screen is performed to obtain the pixel brightness weighted value as the backlight brightness value corresponding to the partitioned screen.

[0139] Among them, the backlight brightness value of each partitioned screen can be calculated by a weighted method, and the weight coefficient of the average pixel brightness of the partitioned screen is set, and the weight coefficient of the maximum pixel brightness is set, and then a weighted sum calculation is performed. For example, the weight coefficient of the average pixel brightness can be set to 0.3, and the weight coefficient of the maximum pixel brightness can be set to 0.7, then, the backlight brightness value of a partitioned screen = 0.3*average pixel brightness+0.7*maximum pixel brightness. By setting the weight coefficients 0.3 and 0.7, the weight of the average pixel brightness is small, which can effectively reduce the influence of the low brightness area in the screen on the backlight brightness, so as to avoid the screen from being too dark, thereby improving the brightness and clarity of the screen; the weight of the maximum pixel brightness is large, which can better retain the details and brightness information of the high brightness area in the screen, so as to improve the contrast and dynamic range of the screen, thereby producing a brighter and more vivid screen effect; finally, the setting of the comprehensive weight can balance the brightness characteristics of different areas in the screen, thereby achieving a more balanced backlight control, so as to avoid problems such as oversaturation or distortion of the screen, and improve the perception and display effect of the screen. Of course, in actual application, other weight coefficients can be used, and other methods can be used to determine the backlight brightness of a partition. For example, the weight coefficient of the average pixel brightness can be set to 0, and the weight coefficient of the maximum pixel brightness can be set to 1. Then, the backlight brightness value of a partition screen = 0*average pixel brightness + 1*maximum pixel brightness. This situation is mainly for screens with a single-tone background and single-color text content on the background, in order to make the fonts clearer.

[0140] S54: Obtain a backlight brightness adjustment parameter of the current display image according to the first backlight brightness data.

[0141] The backlight brightness adjustment parameter refers to a parameter for adjusting the backlight brightness in the first backlight brightness data, and its main purpose is to distinguish the light and dark areas by adjustment, so that the light area is brighter or the dark area is darker. In the embodiment of the present application, the backlight brightness of the dark area is mainly adjusted to highlight the bright area.

[0142] Specifically, the backlight brightness adjustment parameter of the display screen is obtained according to 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; calculating a first ratio value 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 data sum of all backlight brightness values ​​corresponding to the current display screen on the display device, which can be obtained by summing the backlight brightness values ​​corresponding to all partitions of the display device to obtain the first backlight data sum. The maximum backlight data sum refers to the result of summing the corresponding backlight brightness values ​​when the backlight module of the display device is fully lit (i.e., fully lit), which can be specifically obtained by multiplying the number of partitions of the display device (such as 480 partitions) by 255 (i.e., each partition can reach the maximum backlight brightness value of 255), thereby obtaining the maximum backlight data sum. The ratio of the first backlight data sum to the maximum backlight data sum is the backlight brightness adjustment parameter. Among them, the backlight brightness value of each partition screen can be obtained according to the above embodiment.

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

[0145] In one example, the backlight brightness value in the first backlight brightness data that is smaller than the average brightness value of the currently displayed image is adjusted according to the backlight brightness adjustment parameter to obtain the second backlight brightness data, which may specifically include: comparing the first ratio value with a preset first threshold value and a second threshold value respectively, the first threshold value being greater than the second threshold value; when the first ratio value is greater than the first threshold value, multiplying the backlight brightness value in the first backlight brightness data that is smaller than the average brightness value of the currently displayed image 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 value and greater than the second threshold value, multiplying the backlight brightness value in the first backlight brightness data that is smaller than the average brightness value of the currently displayed image by a preset second coefficient to obtain the second backlight brightness data.

[0146] Among them, the preset first threshold and the second threshold are reference thresholds for evaluating whether it is necessary to adjust the contrast of the current display screen of the display device. These two types of reference thresholds are related to the model, specification and brand of the display device, and can be obtained by analyzing and summarizing multiple experimental test data obtained from the test experiments of the brightness contrast of different display devices. The preset first coefficient and the second coefficient are reference coefficients for adjusting the contrast of the current display screen that needs to improve the contrast, and can also be obtained by analyzing and summarizing multiple experimental test data obtained from the test experiments of the brightness contrast of the display device. That is, the first threshold, the second threshold, the first coefficient and the 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, K2 can be a value in the range of 0.2 to 0.3, and in one example, the values ​​of K1 and K2 can be: K1=0.32, K2=0.21.

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

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

[0149] The detected ratio value is used to adjust the backlight brightness that is less than the average brightness value through a set coefficient according to the size of the ratio value, thereby making the dark area darker. This improves the image contrast and can make the bright area brighter, which will make the text displayed on the screen clearer.

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

[0151] Among them, the limiting parameters of the display device at different brightness can be based on the above Figure 1 The peak brightness algorithm curve shown in FIG. Figure 1 The horizontal axis represents the ratio of the total initial backlight brightness data of the current display screen of the display device to the total maximum backlight data when the backlight of the display device is fully lit, that is, the horizontal axis value represents the brightness ratio of the current display screen presented by the display device, and the vertical axis refers to the power consumption limiting factor corresponding to each brightness ratio, and the power consumption limiting factor is the limiting factor described below.

[0152] In this embodiment, after the second backlight brightness data is obtained through the above steps, the second backlight brightness data is further adjusted based on the peak brightness algorithm curve to obtain 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 at different brightnesses 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 the second ratio value between the sum of the second backlight data and the maximum sum of the backlight data corresponding to when the backlight of the display device is fully lit; obtaining the limiting factor corresponding to the second ratio value according to the limiting parameters of the display device at different brightnesses; 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 sum of each backlight brightness value in the second backlight brightness data, and the result of the sum is the second backlight data sum. The maximum backlight data sum refers to the result of summing the corresponding backlight brightness values ​​when the backlight modules of the display device are all lit (i.e., fully lit), and specifically, the number of partitions of the display device (e.g., 480 partitions) is multiplied by 255 (i.e., each partition can reach the maximum backlight brightness value of 255), thereby obtaining the maximum backlight data sum.

[0155] The second backlight data sum is proportional to the maximum backlight data sum to obtain a second proportional value.

[0156] The second ratio value is compared with the limiting parameter of the display device at different brightnesses to obtain a limiting factor corresponding to the second ratio value, and finally the second backlight brightness data is adjusted according to the limiting factor.

[0157] Among them, the limiting parameters may include a first interval range, a second interval range and a third interval range, that is, they may be respectively (0, 0.21*the maximum backlight data sum corresponding to full backlight), (0.21*the maximum backlight data sum corresponding to full backlight, 0.4*the maximum backlight data sum corresponding to full backlight), and (0.4*the maximum backlight data sum corresponding to full backlight, 1*the maximum backlight data sum corresponding to full backlight) in the above embodiment. By judging the interval range to which the second ratio value belongs, the corresponding limiting factor is determined. 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 refer to the above embodiment.

[0158] See also Fig.11 , Fig.11 It is a flowchart of a method for obtaining initial backlight brightness data corresponding to a current display screen on a display device provided by another embodiment of the present application.

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

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

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

[0162] In one implementation, first backlight brightness data corresponding to the current display screen is calculated based on pixel brightness characteristics of the current display screen on the display device, which can specifically include: partitioning the display screen to obtain 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 as the backlight brightness value corresponding to the partition screen; and summarizing 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 most closely calculate the first backlight brightness data corresponding to the current display picture based on the pixel brightness characteristics of the current display picture, the current display picture can be partitioned according to the partition parameters of the display device in the hardware specifications. For example, if the number of backlight partitions of the display device is 480, the current display picture can be partitioned one-to-one according to the divided areas of the backlight partitions, so that each partitioned picture obtained by the division corresponds completely to a backlight partition.

[0164] The pixel brightness characteristic value may include at least one of a pixel brightness mean value, a pixel brightness median value, a pixel brightness minimum value, a pixel brightness maximum value, and a pixel brightness weighted value.

[0165] In one example, for each sub-screen, a pixel brightness feature value that can characterize the pixel brightness feature of the sub-screen is calculated as the backlight brightness value corresponding to the sub-screen, which may specifically include: for each sub-screen, traversing and sorting the pixel brightness values ​​of all pixels in the sub-screen, and selecting the median pixel brightness value located in the middle position of all sorted pixel brightness values ​​as the backlight brightness value corresponding to the sub-screen. That is, the median of the pixel brightness values ​​in each sub-screen is calculated as the pixel brightness feature value of the sub-screen, which is used to characterize the pixel brightness feature of the sub-screen.

[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, it may include: for each partitioned screen, the pixel brightness values ​​of all pixels in the partitioned screen are traversed and the sum of all pixel brightness values ​​is calculated, and the ratio of the sum to the total number of pixels of all pixels in the partitioned screen is calculated to obtain the pixel brightness mean of the partitioned screen as the backlight brightness value corresponding to the partitioned screen.

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

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

[0169] In another example, for each sub-area screen, a pixel brightness characteristic value that can characterize the pixel brightness characteristics of the sub-area screen is calculated as the backlight brightness value corresponding to the sub-area screen, which may specifically include: for each sub-area screen, a weighted sum of the pixel brightness mean value, the minimum pixel brightness value, and the maximum pixel brightness value of the sub-area screen is performed to obtain a pixel brightness weighted value as the backlight brightness value corresponding to the sub-area screen. The pixel brightness weighted value is the closest to the actual backlight brightness of the sub-area screen.

[0170] In one embodiment, the average pixel brightness, the minimum pixel brightness, and the 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 is the brightness of the i-th pixel in the partitioned picture, n is the total number of pixels contained in the partitioned picture, L1 is the average pixel brightness corresponding to the partitioned picture, L2 is the maximum pixel brightness corresponding to the partitioned picture, and L3 is the minimum pixel brightness corresponding to the partitioned picture.

[0175] Determining the backlight brightness value corresponding to the partitioned screen according to the pixel brightness characteristic value of the partitioned screen may be to use the mean pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to use the median pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to use the minimum pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to use the maximum pixel brightness of the partitioned screen as the backlight brightness value corresponding to the partitioned screen; or to combine any two or three of the mean pixel brightness, the minimum pixel brightness and the maximum pixel brightness to calculate the pixel brightness weighted value of the partitioned screen as the backlight brightness value corresponding to the partitioned screen. It should be noted that the calculation method of the pixel brightness characteristic value and the backlight brightness value of the partitioned screen can be determined according to the design and application scenario of the liquid crystal display, and at the same time, the hardware characteristics and power consumption limitations of the liquid crystal display can also be considered to achieve balanced backlight control.

[0176] In one embodiment of the present application, the pixel brightness characteristic value may include a pixel brightness weighted value obtained by combining the pixel brightness mean value and the pixel brightness maximum value. The pixel brightness characteristic value that can characterize the pixel brightness characteristics of each partitioned screen is calculated as the backlight brightness value corresponding to the partitioned screen. Specifically, it may include: for each partitioned screen, weighted summing the pixel brightness mean value and the pixel brightness maximum value of the partitioned screen is performed to obtain the pixel brightness weighted value as the backlight brightness value corresponding to the partitioned screen.

[0177] Among them, the backlight brightness value of each partitioned screen can be calculated by a weighted method, and the weight coefficient of the average pixel brightness of the partitioned screen is set, and the weight coefficient of the maximum pixel brightness is set, and then a weighted sum calculation is performed. For example, the weight coefficient of the average pixel brightness can be set to 0.3, and the weight coefficient of the maximum pixel brightness can be set to 0.7, then, the backlight brightness value of a partitioned screen = 0.3*average pixel brightness+0.7*maximum pixel brightness. By setting the weight coefficients 0.3 and 0.7, the weight of the average pixel brightness is small, which can effectively reduce the influence of the low brightness area in the screen on the backlight brightness, so as to avoid the screen from being too dark, thereby improving the brightness and clarity of the screen; the weight of the maximum pixel brightness is large, which can better retain the details and brightness information of the high brightness area in the screen, so as to improve the contrast and dynamic range of the screen, thereby producing a brighter and more vivid screen effect; finally, the setting of the comprehensive weight can balance the brightness characteristics of different areas in the screen, thereby achieving a more balanced backlight control, so as to avoid problems such as oversaturation or distortion of the screen, and improve the perception and display effect of the screen. Of course, in actual application, other weight coefficients can be used, and other methods can be used to determine the backlight brightness of a partition. For example, the weight coefficient of the average pixel brightness can be set to 0, and the weight coefficient of the maximum pixel brightness can be set to 1. Then, the backlight brightness value of a partition screen = 0*average pixel brightness + 1*maximum pixel brightness. This situation is mainly for screens with a single-tone background and single-color text content on the background, in order to make the fonts clearer.

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

[0179] The first backlight data sum refers to the data sum of all backlight brightness values ​​in the first backlight brightness data, and may be obtained by summing up the backlight brightness values ​​of all subareas.

[0180] S55, calculating a 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.

[0181] The maximum backlight data sum refers to the result of summing up the corresponding backlight brightness values ​​when the backlight modules of the display device are fully lit (that is, the backlight of the display screen is fully lit). Specifically, it can be the number of partitions of the display device (for example, 480 partitions) multiplied by 255 (that is, each partition can reach the maximum backlight brightness value of 255) to obtain the maximum backlight data sum.

[0182] S57. Obtain a limiting factor corresponding to the ratio value according to limiting parameters of the display device at different brightness levels.

[0183] The above ratio value is a ratio of the first backlight data sum to the second backlight data sum.

[0184] The limiting parameters of the display device at different brightness can be based on the above Figure 1 The peak brightness algorithm curve shown in FIG. Figure 1 The horizontal axis represents the ratio of the total first backlight brightness data of the display screen of the display device to the total data when the backlight is fully lit, that is, the horizontal axis value represents the brightness ratio of the display device, and the vertical axis refers to the power consumption limiting factor corresponding to the brightness ratio, and the power consumption limiting factor is the limiting factor described below.

[0185] The limiting parameter may include a first interval range, a second interval range, and a third interval range, which may be respectively (0, 0.21*the sum of the backlight data corresponding to the backlight when it is fully on), (0.21*the sum of the backlight data corresponding to the backlight when it is fully on, 0.4*the sum of the backlight data corresponding to the backlight when it is fully on), and (0.4*the sum of the backlight data corresponding to the backlight when it is fully on, 1*the sum of the backlight data corresponding to the backlight when it is fully on) in the above embodiment. By judging the interval range to which the ratio value belongs, the corresponding limiting factor is determined.

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

[0187] The 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 picture may refer to the above embodiment.

[0188] See also Fig.12 , Fig.12 Calculate the brightness of each pixel of the display screen, and divide the display screen into zones. Take a 24*20 zone (480 zones in total) LCD as the current display device as an example, divide the current screen into 24*20 zones according to the backlight zones, and then use the above steps S52-S58 to calculate the backlight brightness of each zone, and get the following: Fig.13 The matrix of initial backlight brightness data shown in FIG. 1 is as follows. It should be noted that: Fig.13 Only some of the 24*20 partitions are shown for exemplary purposes.

[0189] An embodiment of the present application provides a method for adjusting screen brightness, which obtains first reflection brightness data of a display device in a current environment; determines the type of environment in which the display device is currently located based on the first reflection brightness data, and the environment type is divided into a darkroom environment and a non-darkroom environment; when the type of environment in which the display device is currently located is a darkroom environment, adjusts the initial backlight brightness data corresponding to the current display screen on the display device according to a first brightness weight 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; the first brightness weight coefficient is a ratio of the minimum screen brightness data of the display device to the maximum screen peak brightness data of the display device, that is, the first brightness weight coefficient is proportional to the minimum screen brightness data and inversely proportional to the maximum screen peak brightness data, and the first brightness weight coefficient is affected by the minimum screen brightness data and the maximum screen peak brightness data of the display device. The common constraint of brightness data, using the first brightness weight coefficient to adjust the initial backlight brightness data of the current display picture can appropriately reduce the current screen display brightness in a dark room without making the screen display brightness too dark so that the user cannot see the display picture clearly, can avoid strong light-dark contrast, and can reduce the user's discomfort when watching the display picture in a dark room environment; when the current environment type of the display device is a non-dark room environment, the initial backlight brightness data corresponding to the current display picture on the display device is adjusted according to the second brightness weight coefficient to obtain the target backlight brightness data, so that the display device adjusts the current display screen brightness based on the target backlight brightness data; wherein the second brightness weight 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, and the target screen peak brightness data is the product of the screen peak brightness ratio of the display device and the first reflection brightness data;The second brightness weight coefficient is positively correlated with the screen peak brightness ratio of the display device and the current first reflection brightness data, and negatively correlated with the maximum screen peak brightness data of the display device. When the ambient reflected light becomes increasingly strong, the strong light superimposed by the ambient light and the screen display light is likely to cause fatigue and dizziness in the human eye. At this time, the second brightness weight coefficient will not only be adjusted according to the ambient light (first reflection brightness data), but will also be adjusted synchronously according to the screen peak brightness ratio of the display device. The screen peak brightness ratio is related to the display screen light of the display device. At this time, the second brightness weight coefficient is also subject to the constraints of the three parameters of the screen peak brightness ratio, the first reflection brightness data and the maximum screen peak brightness, which can improve the strong light superimposed by the strong ambient light and the screen display light, causing uncomfortable viewing experience. At the same time, the product of the screen peak brightness ratio and the first reflection brightness data is the target screen peak brightness data, which can characterize the brightness performance of the display device under different ambient lights, can ensure the contrast of the screen display picture, and can avoid the problem of unclear picture content caused by the attenuation of the screen brightness and the dimming adjustment of the current display picture brightness. ;

[0190] The implementation method provided in the present application provides two dimming strategies for the display device in a darkroom environment and a non-darkroom environment, respectively. In a darkroom environment, the screen brightness of the display device is set by considering the minimum screen brightness data and the maximum screen peak brightness data of the display device. In a non-darkroom environment, the screen brightness of the display device is set by considering the ambient light of the environment in which the display device is located, the screen peak brightness ratio and the maximum screen peak brightness data. These two dimming strategies can adaptively adjust the screen brightness, so that the screen display brightness and the ambient reflection brightness are maintained within a viewing experience range that is more comfortable for the human eye, avoiding the situation of strong contrast between light and dark, protecting the eyes and providing users with a better visual viewing experience.

[0191] See also Fig.14 , Fig.14 It is a structural schematic diagram of a screen brightness adjustment device provided in an embodiment of the present application.

[0192] The embodiment of the present application also provides a screen brightness adjustment device 100, which is applied to a display device. The screen brightness adjustment device 100 includes: a reflection 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 reflection brightness acquisition module 101 is used to acquire first reflection brightness data of the display device in the current environment.

[0194] The environment detection module 102 is used to determine the type of environment in which the display device is currently located based on the first reflection brightness data, and the environment types include a darkroom environment and a 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 weight coefficient when the current environment type of the display device is a dark room environment, and obtain the target backlight brightness data, so that the display device can adjust the brightness of the currently displayed screen based on the target backlight brightness data; wherein the first brightness weight 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 weight coefficient when the environment type currently located in the display device is not a darkroom environment, and obtain target backlight brightness data, so that the display device can adjust the brightness of the currently displayed screen based on the target backlight brightness data; wherein the second brightness weight 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 reflection brightness data.

[0197] In some embodiments, the first screen brightness adjustment module 103 is specifically used to: obtain 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 weight 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.

[0198] In some embodiments, the second screen brightness adjustment module 104 is specifically used to: obtain initial backlight brightness data corresponding to the current display screen on the display device; obtain the screen peak brightness ratio of the display device according to 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 the second brightness weight coefficient; calculate the product of the initial backlight brightness data and the second brightness weight 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.

[0199] In some embodiments, the first screen brightness adjustment module 103 is further used to: calculate first backlight brightness data corresponding to the current display picture according to the pixel brightness characteristics of the current display picture on the display device, the first backlight brightness data including at least one backlight brightness value; obtain a backlight brightness adjustment parameter of the current display picture according to the first backlight brightness data; adjust a backlight brightness value in the first backlight brightness data that is less than an average brightness value of the current display picture according to the backlight brightness adjustment parameter to obtain second backlight brightness data; adjust the second backlight brightness data according to the limiting parameters of the display device at different brightnesses to obtain initial backlight brightness data corresponding to the current display picture;

[0200] Alternatively, first backlight brightness data corresponding to the current display picture is calculated based on the pixel brightness characteristics of the current display picture on the display device, the first backlight brightness data including 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 of the first backlight brightness data; the 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 is calculated; according to the limitation parameters of the display device at different brightnesses, a limitation factor corresponding to the ratio value is obtained; the first backlight brightness data is adjusted according to the limitation factor to obtain initial backlight brightness data corresponding to the current display picture.

[0201] In some embodiments, the first screen brightness adjustment module 103 is also used 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; calculate the first ratio value 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 also used to: compare the first ratio value with a preset first threshold and a second threshold respectively, 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 also used to: calculate the sum of the second backlight data corresponding to the second backlight brightness data; calculate the second ratio value between the sum of the second backlight data and the maximum backlight data sum corresponding to when the backlight of the display device is fully lit; obtain the limiting factor corresponding to the second ratio value according to the limiting parameters of the display device at different brightness; adjust the second backlight brightness data according to the limiting factor, and obtain the adjusted second backlight brightness data as the initial backlight brightness data corresponding to the current display screen.

[0204] In some embodiments, the reflection 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 reflection brightness data of the display device in the current environment according to the illuminance value.

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

[0207] It should be noted that the above-mentioned screen brightness adjustment device can execute the screen brightness adjustment method provided in the embodiment of the present application, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in the embodiment of the display screen brightness adjustment device, please refer to the screen brightness adjustment method provided in the embodiment of the present application.

[0208] See also Fig.15 , Fig.15 is a schematic diagram of the hardware structure of a display device 300 for executing a screen brightness adjustment method provided in an embodiment of the present application, such as Fig.15 As shown, the display device 300 includes:

[0209] One or more processors 301 and memory 302, Fig.15 A processor 301 is taken as an example.

[0210] The processor 301 and the memory 302 may be connected via a bus or other means. Fig.15 The example of connecting through bus is taken in the following.

[0211] The memory 302 is a non-volatile computer-readable storage medium that 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 embodiment of the present application (for example, the attached Fig.14 The processor 301 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 302, that is, the screen brightness adjustment method of the above method embodiment is implemented.

[0212] The memory 302 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the screen brightness adjustment device, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 302 may optionally include a memory remotely arranged relative to the processor 301, and these remote memories may be connected to the screen brightness adjustment device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0213] The one or more modules are stored in the memory 302, and 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-mentioned product can execute the method provided in the embodiment of the present application, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided in the embodiment of the present application.

[0215] The display device of the embodiment of the present application exists in various forms, including a display, in which the above-mentioned processor 301 and memory 302 are provided. It also includes a personal computer, a server, etc. When the display device is a terminal device such as a personal computer or a server, the display screen can be a screen on a display integrated with the personal computer or the server itself. It can also be a screen on a display externally connected to the personal computer or the server by wire or wirelessly, and the personal computer or the server is connected to the display in communication to execute the above-mentioned screen brightness adjustment method.

[0216] The present application embodiment provides a computer storage medium, which stores computer executable instructions, and the computer executable instructions are executed by one or more processors, such as Fig.15A processor 301 in the embodiment can enable the one or more processors to execute the screen brightness adjustment method in any of the above method embodiments and 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, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0218] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods of each embodiment of the present application.

[0219] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions 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: Acquire first reflection brightness data of the display device in a current environment; Determine the type of environment in which the display device is currently located based on the first reflection brightness data, where the environment type includes a darkroom environment and a non-darkroom environment; When the environment type in which the display device is currently located 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 weight 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; wherein the first brightness weight 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 display device is currently in a non-darkroom environment, the initial backlight brightness data corresponding to the current display screen on the display device is adjusted according to the second brightness weight 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 weight 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 reflection 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 picture on the display device according to the first brightness weight coefficient to obtain the target backlight brightness data, so that the display device adjusts the current display screen brightness based on the target backlight brightness data, includes: Acquire initial backlight brightness data corresponding to the current display image on the display device; The product of the initial backlight brightness data and the first brightness weight coefficient is calculated 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.

3. The method according to claim 1, characterized in that The step of adjusting the initial backlight brightness data corresponding to the current display picture on the display device according to the second brightness weight coefficient to obtain the target backlight brightness data, so that the display device adjusts the current display screen brightness based on the target backlight brightness data, includes: Acquire initial backlight brightness data corresponding to the current display image on the display device; Acquire a screen peak brightness ratio of the display device according to the first reflection brightness data; Calculate the product of the screen peak brightness ratio and the first reflection brightness data to obtain target screen peak brightness data of the display device; Calculating a ratio between the target screen peak brightness data and the maximum screen peak brightness data of the display device as a second brightness weight coefficient; The product of the initial backlight brightness data and the second brightness weight coefficient is calculated 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.

4. The method according to claim 2 or 3, characterized in that: The obtaining of 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 picture on the display device according to the pixel brightness characteristics of the current display picture, wherein the first backlight brightness data includes at least one backlight brightness value; Acquire a backlight brightness adjustment parameter of the current display image according to the first backlight brightness data; adjusting the backlight brightness value in the first backlight brightness data that is smaller than the average brightness value of the current display picture according to the backlight brightness adjustment parameter to obtain second backlight brightness data; The second backlight brightness data is adjusted according to the limiting parameters of the display device at different brightness levels to obtain initial backlight brightness data corresponding to the current display image; or, Calculating first backlight brightness data corresponding to the current display picture on the display device according to the pixel brightness characteristics of the current display picture, wherein the first backlight brightness data includes at least one backlight brightness value; Summarizing all backlight brightness values ​​in the first backlight brightness data to calculate a first backlight data sum of the first backlight brightness data; Calculating a 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; According to the limiting parameters of the display device at different brightness levels, obtaining a limiting factor corresponding to the ratio value; The first backlight brightness data is adjusted according to the limiting factor to obtain initial backlight brightness data corresponding to the current display picture.

5. The method according to claim 4, characterized in that The acquiring the backlight brightness adjustment parameter of the current display picture according to the first backlight brightness data includes: Summarizing all backlight brightness values ​​in the first backlight brightness data to calculate a first backlight data sum of the first backlight brightness data; A first ratio value between the first backlight data sum and the maximum backlight data sum corresponding to when the backlight of the display device is fully lit is calculated as a backlight brightness adjustment parameter of the current display picture.

6. The method according to claim 5, characterized in that The step of adjusting the backlight brightness value in the first backlight brightness data which is smaller than the average brightness value of the current display picture according to the backlight brightness adjustment parameter to obtain the second backlight brightness data includes: Compare the first ratio value with a preset first threshold and a preset second threshold respectively, and the first threshold is greater than the second threshold; When the first ratio value is greater than the first threshold value, multiplying the backlight brightness value in the first backlight brightness data that is less than the average brightness value of the currently displayed picture by a preset first coefficient to obtain 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 picture is multiplied by a preset second coefficient to obtain 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 parameter of the display device at different brightnesses to obtain the initial backlight brightness data corresponding to the current display screen includes: Calculating a sum of second backlight data corresponding to the second backlight brightness data; Calculating a second ratio value between the second backlight data sum and the maximum backlight data sum corresponding to when the backlight of the display device is fully lit; According to the limiting parameters of the display device at different brightness levels, obtaining a 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 obtained as the initial backlight brightness data corresponding to the current display picture.

8. The method according to claim 1 or 2 or 3 or 5 or 6 or 7, characterized in that: The obtaining first reflection brightness data of the display device in the current environment includes: Obtaining an illuminance value of ambient light received by the display device in a current environment; First reflection brightness data of the display device in the current environment is calculated according to the illumination value.

9. The method according to claim 1 or 2 or 3 or 5 or 6 or 7, characterized in that: The determining, based on the first reflection brightness data, the type of environment in which the display device is currently located includes: Comparing the first reflection brightness data with preset second reflection brightness data, where the second reflection brightness data is a reflection brightness threshold value for distinguishing a darkroom environment from a non-darkroom environment; When the first reflection brightness data is less than the preset second reflection brightness data, determining that the current environment type of the display device is a darkroom environment; When the first reflection brightness data is greater than or equal to the preset second reflection brightness data, it is determined that the current environment type of the display device is a non-darkroom environment.

10. The method according to claim 1 or 2 or 3 or 5 or 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 screen peak brightness data of the display device and the first reflection 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 reflection brightness acquisition module, used to acquire first reflection brightness data of the display device in a current environment; An environment detection module, used for determining the type of environment in which the display device is currently located based on the first reflection brightness data, wherein the environment type includes a darkroom environment and a non-darkroom environment; A 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 the first brightness weight coefficient when the environment type currently located in the display device is a dark room environment, so as 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 first brightness weight 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 weight coefficient when the environment type currently located in the display device is not a dark room environment, and obtain target backlight brightness data, so that the display device can adjust the brightness of the currently displayed screen based on the target backlight brightness data; wherein, the second brightness weight 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 reflection 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, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in any one of claims 1-10.

13. A computer storage medium, characterized in that: The computer storage medium stores instructions or programs, and when the instructions or programs are executed by the display device, the display device executes the method according to any one of claims 1 to 10.

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