Display picture brightness adjusting method and device and electronic equipment

Abstract

The invention relates to the technical field of display, and discloses a display picture brightness adjusting method and device and electronic equipment. The method comprises the following steps: acquiring initial backlight brightness data corresponding to a target display picture, wherein the initial backlight brightness data comprises at least one backlight brightness value; according to the initial backlight brightness data, obtaining a backlight brightness adjustment parameter of a target display picture; adjusting a backlight brightness value smaller than an average brightness value of a target display picture in the initial backlight brightness data according to the backlight brightness adjustment parameter to obtain adjusted initial backlight brightness data; and adjusting the display brightness of the target display picture according to the adjusted initial backlight brightness data and the limiting parameters of the display under different brightness. According to the method, the backlight brightness of the dark partition in the initial backlight brightness data can be adjusted, and the brightness-darkness contrast of different partitions is distinguished, so that the content displayed by the display picture is clearer, and a user can have better viewing experience under the constraint of maximum power consumption.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a method, device and electronic device for adjusting the brightness of a display screen. 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. Since the hardware device has a maximum power limit, that is, a maximum power consumption limit, while considering the power consumption, it is also hoped to improve the display effect of the multi-zone backlight drive LCD monitor. For example, the brightness adjustment algorithm is integrated in the internal chip of the LCD monitor. The brightness adjustment algorithm adjusts the received backlight data according to 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, thereby ensuring that the display brightness / contrast is maximized under the constraint of maximum power consumption.

[0003] In the process of implementing the embodiments of the present application, the inventors found that if the brightness of the currently displayed image is greater than a threshold value, the processing method according to the above-mentioned brightness adjustment algorithm will cause the backlight brightness to decrease. If the interference of the natural light environment is superimposed on this, it will seriously affect the user's viewing experience. Therefore, how to adjust the brightness of the displayed image under the constraint of maximum power consumption and make the brightness of the adjusted displayed image give the user a better viewing experience is a problem that urgently needs to be solved. Summary of the invention

[0004] The main technical problem solved by the implementation of the present application is how to adjust the brightness of the display screen under the constraint of maximum power consumption and make the brightness of the adjusted display screen give the user a better viewing experience.

[0005] In order to solve the above technical problems, a technical solution adopted in the implementation mode of the present application is: providing a method for adjusting the brightness of a display screen, including: obtaining initial backlight brightness data corresponding to a target display screen, the initial backlight brightness data including at least one backlight brightness value; obtaining a backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data; adjusting the backlight brightness value in the initial backlight brightness data that is smaller than the average brightness value of the target display screen according to the backlight brightness adjustment parameter to obtain the adjusted initial backlight brightness data; adjusting the display brightness of the target display screen according to the adjusted initial backlight brightness data and the limit parameters of the display at different brightnesses.

[0006] Optionally, obtaining initial backlight brightness data corresponding to the target display screen includes: partitioning the target display screen to obtain at least one partition screen; for each partition screen, determining a backlight brightness value corresponding to the partition screen according to a pixel brightness characteristic value of the partition screen, wherein the pixel brightness characteristic value includes at least one of a pixel brightness mean value, a pixel brightness minimum value, and a pixel brightness maximum value; and aggregating the backlight brightness values ​​corresponding to each of the plurality of partition screens as the initial backlight brightness data corresponding to the target display screen.

[0007] Optionally, the pixel brightness characteristic value includes a pixel brightness mean and a pixel brightness maximum value; for each of the partitioned screens, determining the backlight brightness value corresponding to the partitioned screen according to the pixel brightness characteristic value of the partitioned screen, including: for each of the partitioned screens, performing weighted summation of the pixel brightness mean and the pixel brightness maximum value of the partitioned screen to obtain the backlight brightness value corresponding to the partitioned screen.

[0008] Optionally, obtaining the backlight brightness adjustment parameter of the target display screen based on the initial backlight brightness data includes: calculating a first backlight data sum of the initial backlight brightness data based on the backlight brightness value; and calculating a first ratio value between the first backlight data sum and a second backlight data sum corresponding to when the backlight of the target display screen is fully lit as the backlight brightness adjustment parameter.

[0009] Optionally, adjusting the backlight brightness values ​​in the initial backlight brightness data that are smaller than the average brightness value of the target display screen according to the backlight brightness adjustment parameter to obtain the adjusted initial 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 values ​​in the initial backlight brightness data that are smaller than the average brightness value by a preset first coefficient to obtain the adjusted initial 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 values ​​in the initial backlight brightness data that are smaller than the average brightness value by a preset second coefficient to obtain the adjusted initial backlight brightness data.

[0010] Optionally, adjusting the display brightness of the target display picture according to the adjusted initial backlight brightness data and the limiting parameters of the display at different brightnesses includes: calculating a third backlight data sum corresponding to the adjusted initial backlight brightness data; calculating a fourth backlight data sum corresponding to the adjusted initial backlight brightness data when the backlight of the target display picture is fully lit; calculating a second ratio value of the third backlight data sum to the fourth backlight data sum; obtaining a limiting factor corresponding to the second ratio value according to the limiting parameters of the display at different brightnesses; and adjusting the adjusted initial backlight brightness data according to the limiting factor to obtain the adjusted display brightness of the target display picture.

[0011] In order to solve the above technical problems, another technical solution adopted in the embodiment of the present application is: to provide a display screen brightness adjustment device, including: an initial backlight brightness data acquisition module, used to obtain initial backlight brightness data corresponding to the target display screen, the initial backlight brightness data including at least one backlight brightness value; a backlight brightness adjustment parameter acquisition module, used to obtain the backlight brightness adjustment parameters of the target display screen according to the initial backlight brightness data; a first backlight brightness data adjustment module, used to adjust the backlight brightness value in the initial backlight brightness data that is less than the average brightness value of the target display screen according to the backlight brightness adjustment parameters, to obtain the adjusted initial backlight brightness data; a second backlight brightness data adjustment module, used to adjust the display brightness of the target display screen according to the adjusted initial backlight brightness data and the limit parameters of the display at different brightnesses.

[0012] To solve the above technical problems, another technical solution adopted in the implementation mode of the present application is: to provide an electronic 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.

[0013] In order to solve the above technical problems, another technical solution adopted in the implementation mode of the present application is: providing a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by an electronic device, the electronic device executes the method as described above.

[0014] To solve the above technical problems, another technical solution adopted in the implementation mode of the present application is: to provide a computer program product, wherein the computer program product includes a computer program stored on a non-volatile computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by an electronic device, the electronic device executes the method as described above.

[0015] Different from the related art, the embodiments of the present application provide a method, device and electronic device for adjusting the brightness of a display screen, by obtaining initial backlight brightness data corresponding to a target display screen, the initial backlight brightness data including at least one backlight brightness value, obtaining a backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data, and then adjusting the backlight brightness value in the initial backlight brightness data that is smaller than the average brightness value of the target display screen according to the backlight brightness adjustment parameter to obtain the adjusted initial backlight brightness data, and then adjusting the display brightness of the target display screen according to the adjusted initial backlight brightness data and the limiting parameters of the display at different brightnesses. The implementation mode provided by the present application, on the one hand, adjusts the initial backlight brightness data through the backlight brightness adjustment parameter, specifically adjusts the backlight brightness value in the initial backlight brightness data that is less than the average brightness value, thereby being able to adjust the backlight brightness of the dark partition in the initial backlight brightness data, distinguishing the light and dark contrast of different partitions, so that the content displayed on the display screen will be clearer; on the other hand, the display brightness of the display screen is jointly adjusted by using the limiting parameters of the display at different brightness and the initial backlight brightness data, so that the brightness of the display screen can be adjusted under the constraint of maximum power consumption, and the brightness of the adjusted display screen allows users to have a better viewing experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 is a schematic diagram of a peak brightness algorithm curve provided in an embodiment of the present application;

[0018] Figure 2 is a flow chart of a method for adjusting the brightness of a display screen provided in an embodiment of the present application;

[0019] Figure 3 is a flow chart of a method for obtaining initial backlight brightness data corresponding to a target display screen provided by an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a target display screen provided in an embodiment of the present application;

[0021] Figure 5 The embodiment of this application provides Figure 4 A schematic diagram of local initial backlight brightness data corresponding to the target display screen;

[0022] Figure 6 is a flow chart of a method for adjusting the backlight brightness in the initial backlight brightness data which is less than the average brightness value according to the backlight brightness adjustment parameter provided in an embodiment of the present application;

[0023] Figure 7 It is a structural schematic diagram of a display screen brightness adjustment device provided in an embodiment of the present application;

[0024] Figure 8 It is a schematic diagram of the hardware structure of an electronic device that executes a method for adjusting the brightness of a display screen provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and 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.

[0026] It should be noted that, if there is no conflict, the various features in the embodiments of the present application can be combined with each other, all within the scope of protection of the present application. In addition, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a different order than the module division in the device schematic diagram or the order in the flow chart.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] The embodiment of the present application provides a method for adjusting the brightness of a display screen, where the display screen is specifically a screen displayed on a liquid crystal display panel. The liquid crystal display panel may have multiple 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. For example, the liquid crystal display panel may be a liquid crystal display with 480 backlight partitions. It is a display that uses partition control technology to divide the backlight source into 480 independent areas. The brightness of each area can be adjusted independently, and the brightness and color of each area can be specifically adjusted according to the brightness and color changes of the image to achieve higher contrast and more accurate color expression. The brightness of the corresponding backlight partition can be controlled by receiving 480 data sent by the host computer. In order to consider the power consumption limitation factor, the internal chip of the liquid crystal display can be integrated as follows: Figure 1 The peak brightness algorithm curve shown is used to adjust the brightness of the backlight partition, so as to maximize the display brightness / contrast while meeting the power consumption limit of the display hardware.

[0029] Specifically, the internal chip of the liquid crystal display calculates the current backlight data and corresponding to the 480 backlight data according to the received 480 backlight data, and calculates the maximum backlight data and corresponding to the 480 backlight data when the backlight is fully lit, and then calculates the current backlight data and corresponding to the 480 backlight data according to the received 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 and corresponding to the 480 backlight data includes the first interval range: (0, 0.21*the maximum backlight data and corresponding to the backlight when it is fully on), the second interval range: (0.21*the maximum backlight data and corresponding to the backlight when it is fully on, 0.4*the maximum backlight data and corresponding to the backlight when it is fully on) and the third interval range: (0.4*the maximum backlight data and corresponding to the backlight when it is fully on, 1*the maximum backlight data and corresponding to the backlight when it is fully on). When the current backlight data and corresponding to the 480 backlight data are within the first interval, that is, the current backlight data and <0.21*the maximum backlight data and corresponding to the backlight when it is fully lit, the internal chip of the LCD 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 current backlight data and corresponding to the 480 backlight data are within the second interval, that is, 0.21*the maximum backlight data and corresponding to the backlight when it is fully lit < the current backlight data and corresponding to the 480 backlight data <0.4*the maximum backlight data and corresponding to the backlight when it is fully lit, the internal chip of the LCD will act as follows: Figure 1The curve with a slope of -2.105 shown in the figure processes the 480 backlight data received, and after processing, sends them to the display driver chip at the back end to light up the backlight partition of the display; when the current backlight data and corresponding to the 480 backlight data are within the third interval range mentioned above, that is, the current backlight data and corresponding to the 480 backlight data are >0.4*the maximum backlight data and 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 display driver chip at the back end to light up the backlight partition of the display.

[0030] The current backlight data and corresponding to the 480 backlight data refer 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 current backlight data and corresponding to the 480 backlight data. The maximum backlight data and corresponding to the 480 backlight data when the backlight is fully lit refers to the value obtained by summing the maximum value of the backlight brightness of each partition in the 480 partitions, that is, the product of the number of partitions and the maximum value of the backlight brightness (such as 255) (such as 480*255) is the maximum backlight data and corresponding to the backlight when the backlight 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, pulse width modulation) technology, that is, the duty cycle of a square wave signal with a fixed frequency (that is, the ratio of the high level time to the cycle time) 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.

[0031] Among them, the above-mentioned basis is as follows Figure 1The 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 1 The horizontal axis represents the constant. Specifically, the horizontal axis represents the ratio of the initial backlight brightness data of the current display screen of the display to 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 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 initial backlight brightness data of the current display screen of the display and the maximum backlight data when the display backlight is fully lit. If it is a partitioned display, the initial backlight brightness data of the display screen is the value obtained by summing the backlight brightness values ​​of all partitions, and 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 initial backlight brightness data of the display screen can be the backlight brightness value of the current display screen, and the maximum backlight data when the backlight is fully lit can be 255.

[0032] Among them, the peak brightness algorithm can be used to evaluate the brightness performance of the backlight module of the LCD display, so that the image has better visual effects and richer details. By integrating the peak brightness algorithm curve in the internal chip of the LCD display, the backlight brightness of the LCD display can be adjusted accordingly during the specific application process, thereby achieving the purpose of reducing the backlight brightness power consumption.

[0033] The inventors found that if the current backlight data corresponding to the 480 backlight data is greater than 0.4*the maximum backlight data corresponding to the full backlight, the internal chip of the liquid crystal display will multiply the received 480 backlight data by 0.6. At this time, the initial backlight will be discounted by 0.6, resulting in the global brightness of the displayed content in the display screen being reduced. In particular, if the interference of the natural light environment is superimposed, the brightness of the displayed content may be lower, and the contrast of the displayed content is also reduced, which can easily reduce the user's viewing experience. Therefore, in some cases, adjusting the brightness of the display screen according to the above-mentioned peak brightness algorithm curve does not give the user a better viewing experience. Therefore, the inventors provide a method for adjusting the brightness of a display screen, which can not only meet the constraints of the maximum power consumption, but also enable the brightness of the adjusted display screen to give the user a better viewing experience.

[0034] The following embodiment provides a method for adjusting the brightness of a display screen. The execution subject of the method for adjusting the brightness of a display screen is generally an electronic device with certain computing capabilities, such as a computer device. In some possible implementations, the method for adjusting the brightness of a display screen can be implemented by a processor calling a computer-readable instruction stored in a memory.

[0035] Specifically, Figure 2 : is a flow chart of a method for adjusting the brightness of a display screen provided in an embodiment of the present application. The method comprises:

[0036] S11. Acquire initial backlight brightness data corresponding to a target display screen, wherein the initial backlight brightness data includes at least one backlight brightness value.

[0037] The target display screen is a screen displayed on a backlight partitioned liquid crystal display (such as a 480 backlight partitioned liquid crystal display, etc.), and the target display screen includes display content, which can be text, pictures, images, etc. The initial backlight brightness data refers to dividing the back panel LED lights of the liquid crystal display into multiple areas, each area includes its corresponding backlight brightness value, and the summary of all the backlight brightness values ​​is the initial backlight brightness data corresponding to the target display screen.

[0038] In one embodiment, the target display screen may not be a liquid crystal display with backlight partitioning. For example, the liquid crystal display may have only one set of backlight sources. In this case, partitioning is not required and the initial backlight brightness data may only include one backlight brightness value.

[0039] Among them, Figure 3 As shown, the obtaining of initial backlight brightness data corresponding to the target display screen includes:

[0040] S111. Partition the target display screen to obtain at least one partition screen.

[0041] In one example, an adaptive partitioning method can be used to partition the target display screen, that is, the target display screen can be partitioned accordingly according to the regional distribution of the backlight partitions of the display device, so that the partitioned screens obtained by partitioning the target display screen have a one-to-one correspondence with the backlight partitions.

[0042] S112: For each subarea picture, determine a backlight brightness value corresponding to the subarea picture according to a pixel brightness characteristic value of the subarea picture.

[0043] The pixel brightness characteristic value may include at least one of a pixel brightness mean value, a pixel brightness minimum value, and a pixel brightness maximum value.

[0044] In an example, the corresponding pixel brightness characteristic value may be obtained by traversing all pixels in the partitioned picture and calculating the average value, the minimum value, and the maximum value of the brightness values.

[0045] In one embodiment, the average pixel brightness, the minimum pixel brightness, and the maximum pixel brightness can be obtained by the following formula:

[0046]

[0047] L2=max(I i );

[0048] L3=min(I i );

[0049] 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.

[0050] 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 average 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 the average pixel brightness, the minimum pixel brightness and the maximum pixel brightness to calculate the backlight brightness value of 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.

[0051] S113: Summarize the backlight brightness values ​​corresponding to the plurality of partitioned screens as initial backlight brightness data corresponding to the target display screen.

[0052] The backlight brightness value is obtained according to the above method, so as to control the backlight source of the liquid crystal display to realize the backlight control of the partitioned screen.

[0053] In one embodiment of the present application, the pixel brightness characteristic value includes a pixel brightness mean and a pixel brightness maximum value, and for each of the partitioned screens, the backlight brightness value corresponding to the partitioned screen is determined according to the pixel brightness characteristic value of the partitioned screen, including: for each of the partitioned screens, performing a weighted summation of the pixel brightness mean and the pixel brightness maximum value of the partitioned screen to obtain the backlight brightness value corresponding to the partitioned screen.

[0054] Among them, the backlight brightness value of each sub-area screen can be calculated by a weighted method, the weight coefficient of the average pixel brightness of the sub-area screen is set, and the weight coefficient of the maximum pixel brightness is set, and then a weighted summation 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 sub-area screen = 0.3*average pixel brightness+0.7*maximum pixel brightness. By setting the weight coefficients 0.3 and 0.7, where the weight of the average pixel brightness is small, the influence of the lower brightness area in the screen on the backlight brightness can be effectively reduced, so that the screen can be prevented from being too dark, thereby improving the brightness and clarity of the screen; where the weight of the maximum pixel brightness is large, the details and brightness information of the higher brightness area in the screen can be better retained, so that the contrast and dynamic range of the screen can be improved, 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 that the screen can be prevented from being oversaturated or distorted, and the perception and display effect of the screen can be improved. 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.

[0055] For example, Figure 4is the target display screen, which includes the displayed text. Calculate the brightness of each pixel of the target display screen, and partition the target display screen. Take a display with 24*20 partitions (480 partitions in total) as an example, cut the current screen into 24*20 image partitions according to the backlight partitions, and then use the above steps S112 and S113 to calculate the backlight brightness of each partition, and get the following: Figure 5 The local initial backlight brightness data shown is as follows: Figure 5 Only some of the 24*20 partitions are shown for exemplary purposes.

[0056] S12: Acquire a backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data.

[0057] The backlight brightness adjustment parameter refers to a parameter for adjusting the backlight brightness in the initial backlight brightness data, and its main purpose is to distinguish the light and dark areas by adjustment, making the light area brighter or the dark area darker. In the embodiment of the present application, the backlight brightness of the dark area is mainly adjusted to highlight the bright area brighter.

[0058] Specifically, the method of obtaining the backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data includes: calculating the first backlight data sum of the initial backlight brightness data according to the backlight brightness value, and calculating the first ratio value between the first backlight data sum and the second backlight data sum corresponding to the backlight of the target display screen when the backlight is fully lit as the backlight brightness adjustment parameter. The first backlight data sum refers to the data sum of all backlight brightness values, which can be obtained by summing the backlight brightness values ​​of all partitions. The second backlight data sum refers to the result of summing the corresponding backlight data values ​​when the backlight of the target display screen is fully lit, specifically, multiplying the number of partitions (such as 480 partitions) by 255 (that is, each partition can reach the maximum backlight brightness value of 255), thereby obtaining the second backlight data sum. The ratio value of the first backlight data sum to the second 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 step S112. For example, using the above method steps, it can be obtained Figure 5 The initial backlight brightness data shown has an average brightness value of 117 and a ratio value of 0.462.

[0059] S13, adjusting the backlight brightness values ​​in the initial backlight brightness data that are smaller than the average brightness value of the target display screen according to the backlight brightness adjustment parameter to obtain adjusted initial backlight brightness data.

[0060] like Figure 6As shown, the backlight brightness value in the initial backlight brightness data that is smaller than the average brightness value of the target display screen is adjusted according to the backlight brightness adjustment parameter to obtain the adjusted initial backlight brightness data, including:

[0061] S131, comparing 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;

[0062] S132: when the first ratio value is greater than the first threshold value, multiply the backlight brightness value in the initial backlight brightness data that is less than the average brightness value by a preset first coefficient to obtain adjusted initial backlight brightness data;

[0063] S133. When the first ratio value is less than or equal to the first threshold value and greater than the second threshold value, multiply the backlight brightness values ​​in the initial backlight brightness data that are less than the average brightness value by a preset second coefficient to obtain adjusted initial backlight brightness data.

[0064] 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.

[0065] 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.

[0066] 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 in the initial backlight brightness data that is less than the average brightness value 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 in the initial backlight brightness data that is less than the average brightness value is multiplied by 0.7. If the first ratio value is less than or equal to 0.21, the backlight brightness value in the initial backlight brightness data that is less than the average brightness value is multiplied by 1.

[0067] 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.

[0068] S14: adjusting the display brightness of the target display image according to the adjusted initial backlight brightness data and the limiting parameters of the display at different brightness levels.

[0069] Among them, the limit parameters of the display at different brightness can be based on the above Figure 1 The preset peak brightness algorithm curve shown in FIG. Figure 1 The horizontal axis represents the ratio of the initial backlight brightness data of the current display screen of the display to the maximum backlight data when the display backlight is fully lit, that is, the horizontal axis value represents the brightness ratio of the current display screen presented by the display, 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.

[0070] In this embodiment, after obtaining the adjusted initial backlight brightness data through the above steps S11 to S13, the adjusted initial backlight brightness data is further adjusted based on the preset peak brightness algorithm curve to obtain the final backlight data. The final backlight data can be sent to the backlight module of the display so that the display adjusts the display brightness of the target display screen based on the backlight data.

[0071] Specifically, S14 may include: calculating the third backlight data and corresponding to the adjusted initial backlight brightness data; calculating the fourth backlight data and corresponding to the adjusted initial backlight brightness data when the backlight of the target display screen is fully lit; calculating a second ratio value of the third backlight data and the fourth backlight data; obtaining a limiting factor corresponding to the second ratio value according to the limiting parameters of the display at different brightnesses; adjusting the adjusted initial backlight brightness data according to the limiting factor to obtain the adjusted display brightness of the target display screen.

[0072] The third backlight data sum refers to the sum of each backlight brightness value in the adjusted initial backlight brightness data, and the sum result is the third backlight data. The fourth 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 can be the number of partitions of the display device (e.g., 480 partitions) multiplied by 255 (i.e., each partition can reach the maximum backlight brightness value of 255).

[0073] The third backlight data sum is proportional to the fourth backlight data sum to obtain a second proportional value.

[0074] The second ratio value is compared with the limiting parameter to obtain a limiting factor corresponding to the second ratio value, and finally the adjusted initial backlight brightness data is adjusted according to the limiting factor.

[0075] Among them, the limiting parameter 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 corresponding to the backlight when it is fully on), (0.21*the maximum backlight data corresponding to the backlight when it is fully on, 0.4*the maximum backlight data corresponding to the backlight when it is fully on), and (0.4*the maximum backlight data corresponding to the backlight when it is fully on, 1*the maximum backlight data corresponding to the backlight when it is fully on) 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 adjusted initial backlight brightness data according to the limiting factor can refer to the above embodiment.

[0076] An embodiment of the present application provides a method for adjusting the brightness of a display screen. The method obtains initial backlight brightness data corresponding to a target display screen, the initial backlight brightness data including at least one backlight brightness value, obtains a backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data, and then adjusts the backlight brightness values ​​in the initial backlight brightness data that are smaller than an average brightness value of the target display screen according to the backlight brightness adjustment parameter to obtain the adjusted initial backlight brightness data, and then adjusts the display brightness of the target display screen according to the adjusted initial backlight brightness data and the limiting parameters of the display at different brightnesses. The method of this embodiment, on the one hand, adjusts the initial backlight brightness data through the backlight brightness adjustment parameters, specifically adjusts the backlight brightness value in the initial backlight brightness data that is less than the average brightness value, thereby adjusting the backlight brightness of the dark partition in the initial backlight brightness data, distinguishing the light and dark contrast of different partitions, so that the content displayed on the display screen will be clearer; on the other hand, the display brightness of the display screen is jointly adjusted using the limit parameters of the display at different brightness and the initial backlight brightness data, so that the brightness of the display screen can be adjusted under the constraint of maximum power consumption, and the brightness of the adjusted display screen allows users to have a better viewing experience, and reasonable adjustment of the display screen brightness can reduce wear and damage to the display, thereby extending the life of the display.

[0077] Figure 7 It is a structural schematic diagram of a display screen brightness adjustment device provided in an embodiment of the present application, wherein the display screen brightness adjustment device 20 comprises: an initial backlight brightness data acquisition module 21, a backlight brightness adjustment parameter acquisition module 22, a first backlight brightness data adjustment module 23 and a second backlight brightness data adjustment module 24.

[0078] The initial backlight brightness data acquisition module 21 is used to acquire the initial backlight brightness data corresponding to the target display screen, and the initial backlight brightness data includes at least one backlight brightness value; the backlight brightness adjustment parameter acquisition module 22 is used to acquire the backlight brightness adjustment parameters of the target display screen according to the initial backlight brightness data; the first backlight brightness data adjustment module 23 is used to adjust the backlight brightness value in the initial backlight brightness data that is less than the average brightness value of the target display screen according to the backlight brightness adjustment parameters to obtain the adjusted initial backlight brightness data; the second backlight brightness data adjustment module 24 is used to adjust the display brightness of the target display screen according to the adjusted initial backlight brightness data and the limit parameters of the display at different brightnesses.

[0079] Among them, the initial backlight brightness data acquisition module 21 is specifically used to: partition the target display screen to obtain at least one partition screen; for each partition screen, determine the backlight brightness value corresponding to the partition screen according to the pixel brightness characteristic value of the partition screen, and the pixel brightness characteristic value includes at least one of the pixel brightness mean, the pixel brightness minimum and the pixel brightness maximum; summarize the backlight brightness values ​​corresponding to each of the multiple partition screens as the initial backlight brightness data corresponding to the target display screen.

[0080] The pixel brightness characteristic value includes the pixel brightness mean value and the pixel brightness maximum value;

[0081] For each of the partitioned pictures, the backlight brightness value corresponding to the partitioned picture is determined according to the pixel brightness characteristic value of the partitioned picture, including: for each of the partitioned pictures, a weighted summation of the pixel brightness mean value and the pixel brightness maximum value of the partitioned picture is performed to obtain the backlight brightness value corresponding to the partitioned picture.

[0082] The backlight brightness adjustment parameter acquisition module 22 is specifically used to calculate the first backlight data and of the initial backlight brightness data according to the backlight brightness value; calculate the first ratio value between the first backlight data and the second backlight data and corresponding to the backlight of the target display screen when the backlight is fully bright as the backlight brightness adjustment parameter.

[0083] The first backlight brightness data adjustment module 23 is specifically used to compare the first ratio value with a preset first threshold and a second threshold respectively, and the first threshold is greater than the second threshold; when the first ratio value is greater than the first threshold, the backlight brightness value in the initial backlight brightness data that is smaller than the average brightness value is multiplied by a preset first coefficient to obtain the adjusted initial 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 initial backlight brightness data that is smaller than the average brightness value is multiplied by a preset second coefficient to obtain the adjusted initial backlight brightness data.

[0084] The second backlight brightness data adjustment module 24 is specifically used to calculate the third backlight data and corresponding to the adjusted initial backlight brightness data; calculate the fourth backlight data and corresponding to the adjusted initial backlight brightness data when the backlight of the target display screen is fully lit; calculate the second ratio value of the third backlight data and the fourth backlight data; obtain the limiting factor corresponding to the second ratio value according to the limiting parameters of the display at different brightnesses; adjust the adjusted initial backlight brightness data according to the limiting factor to obtain the adjusted display brightness of the target display screen.

[0085] It should be noted that the above-mentioned display screen brightness adjustment device can execute the display screen brightness adjustment method provided in the embodiment of the present application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not fully described in the embodiment of the display screen brightness adjustment device, please refer to the display screen brightness adjustment method provided in the embodiment of the present application.

[0086] Figure 8 is a schematic diagram of the hardware structure of an electronic device 30 for executing a display screen brightness adjustment method provided in an embodiment of the present application, such as Figure 8 As shown, the electronic device 30 includes:

[0087] One or more processors 31 and memory 32, Figure 8 A processor 31 is taken as an example.

[0088] The processor 31 and the memory 32 may be connected via a bus or other means. Figure 8 The example of connecting through bus is taken in the following.

[0089] The memory 32 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 display screen brightness adjustment method in the embodiment of the present application (for example, the attached Figure 7 The processor 31 executes various functional applications and data processing of the server by running the non-volatile software programs, instructions and modules stored in the memory 32, that is, implements the display screen brightness adjustment method of the above method embodiment.

[0090] The memory 32 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required by at least one function; the data storage area may store data created according to the use of the display screen brightness adjustment device, etc. In addition, the memory 32 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 32 may optionally include a memory remotely arranged relative to the processor 31, and these remote memories may be connected to the display 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.

[0091] The one or more modules are stored in the memory 32, and when executed by the one or more processors 31, the display screen brightness adjustment method in any of the above method embodiments is executed, for example, the above described Figure 2 , Figure 3 and Figure 6 Method steps and implementation Figure 7 The functions of the modules in .

[0092] 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.

[0093] The electronic device of the embodiment of the present application exists in various forms, including a display, in which the processor 31 and the memory 32 are provided.

[0094] It also includes personal computers, servers, etc. When the electronic device is a terminal device such as a personal computer or a server, the target display screen can be a screen on a display integrated with the personal computer or server itself. It can also be a screen on a display externally connected to the personal computer or server by wired or wireless means, and the personal computer or server is connected to the display in communication, and is used to obtain the initial backlight brightness data corresponding to the target display screen, and the initial backlight brightness data includes the backlight brightness of each partition; the average brightness value of the initial backlight brightness data is calculated according to the backlight brightness of each partition; the backlight brightness adjustment parameter of the target display screen is obtained according to the backlight brightness of each partition; the backlight brightness in the initial backlight brightness data that is less than the average brightness value is adjusted according to the backlight brightness adjustment parameter to obtain the adjusted initial backlight brightness data; the display brightness of the target display screen is adjusted according to the adjusted initial backlight brightness data and the preset peak brightness algorithm curve; the backlight data corresponding to the adjusted display brightness of the target display screen is sent to the driver chip of the display, and the driver chip is used to light up the display according to the adjusted backlight data. Wherein, the display can be a backlight partitioned liquid crystal display.

[0095] The embodiment of the present application provides a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more processors, such as Figure 6 A processor 31 in the embodiment may enable the one or more processors to execute the display screen brightness adjustment method in any of the above method embodiments, for example, to execute the above described Figure 2 , Figure 3 and Figure 6 Method steps and implementation Figure 7 The functions of the modules in .

[0096] The present application provides a computer program product, wherein the computer program product includes a computer program stored on a non-volatile computer-readable storage medium, wherein the computer program includes program instructions, and when the program instructions are executed by the electronic device, the electronic device is enabled to execute the display screen brightness adjustment method in any of the above method embodiments, for example, to execute the above described Figure 2 , Figure 3 and Figure 6 Method steps and implementation Figure 7 The functions of the modules in .

[0097] 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 shown as units may or may not be physical units, that is, they may be located in one place or 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.

[0098] Through the description of the above implementation methods, ordinary technicians in this field can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Ordinary technicians in this field can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. 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 application.

Claims

1. A method for adjusting the brightness of a display screen, characterized in that: include: Acquire initial backlight brightness data corresponding to the target display screen, wherein the initial backlight brightness data includes at least one backlight brightness value; Acquire a backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data; adjusting the backlight brightness value in the initial backlight brightness data that is smaller than the average brightness value of the target display screen according to the backlight brightness adjustment parameter to obtain the adjusted initial backlight brightness data; The display brightness of the target display image is adjusted according to the adjusted initial backlight brightness data and the limiting parameters of the display at different brightnesses.

2. The method according to claim 1, characterized in that The obtaining of initial backlight brightness data corresponding to the target display screen includes: Partitioning the target display screen to obtain at least one partitioned screen; For each of the sub-area pictures, determine the backlight brightness value corresponding to the sub-area picture according to the pixel brightness characteristic value of the sub-area picture, wherein the pixel brightness characteristic value includes at least one of the pixel brightness mean value, the pixel brightness minimum value and the pixel brightness maximum value; The backlight brightness values ​​corresponding to the plurality of partitioned screens are collected as initial backlight brightness data corresponding to the target display screen.

3. The method according to claim 2, characterized in that The pixel brightness characteristic value includes a pixel brightness mean value and a pixel brightness maximum value; The step of determining, for each of the sub-area pictures, a backlight brightness value corresponding to the sub-area picture according to a pixel brightness characteristic value of the sub-area picture comprises: For each of the subarea pictures, a weighted sum is performed on the average pixel brightness and the maximum pixel brightness of the subarea picture to obtain a backlight brightness value corresponding to the subarea picture.

4. The method according to any one of claims 1 to 3, characterized in that: The step of obtaining the backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data includes: Calculate the first backlight data sum of the initial backlight brightness data according to the backlight brightness value; A first ratio value between the first backlight data and the second backlight data corresponding to when the backlight of the target display screen is fully lit is calculated as a backlight brightness adjustment parameter.

5. The method according to claim 4, characterized in that The step of adjusting the backlight brightness value in the initial backlight brightness data that is smaller than the average brightness value of the target display screen according to the backlight brightness adjustment parameter to obtain the adjusted initial 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 initial backlight brightness data that is less than the average brightness value by a preset first coefficient to obtain adjusted initial 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 values ​​in the initial backlight brightness data that are less than the average brightness value are multiplied by a preset second coefficient to obtain adjusted initial backlight brightness data.

6. The method according to claim 4, characterized in that The step of adjusting the display brightness of the target display image according to the adjusted initial backlight brightness data and the limiting parameters of the display at different brightnesses includes: Calculating the third backlight data and corresponding to the adjusted initial backlight brightness data; Calculate the sum of fourth backlight data corresponding to the adjusted initial backlight brightness data when the backlight of the target display screen is fully lit; Calculating a second ratio value of the third backlight data sum and the fourth backlight data sum; According to the limiting parameters of the display at different brightness levels, obtaining a limiting factor corresponding to the second ratio value; The adjusted initial backlight brightness data is adjusted according to the limiting factor to obtain the adjusted display brightness of the target display picture.

7. A display screen brightness adjustment device, characterized in that: include: An initial backlight brightness data acquisition module, used to acquire initial backlight brightness data corresponding to a target display screen, wherein the initial backlight brightness data includes at least one backlight brightness value; A backlight brightness adjustment parameter acquisition module, used to acquire the backlight brightness adjustment parameter of the target display screen according to the initial backlight brightness data; A first backlight brightness data adjustment module, configured to adjust the backlight brightness value in the initial backlight brightness data that is smaller than the average brightness value of the target display screen according to the backlight brightness adjustment parameter, to obtain the adjusted initial backlight brightness data; The second backlight brightness data adjustment module is used to adjust the display brightness of the target display image according to the adjusted initial backlight brightness data and the limit parameters of the display at different brightness levels.

8. An electronic 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 1-6.

9. A non-volatile computer-readable storage medium, characterized in that: The non-volatile computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are executed by an electronic device, the electronic device executes the method according to any one of claims 1 to 6.

10. A computer program product, characterized in that The computer program product comprises a computer program stored on a non-volatile computer-readable storage medium, wherein the computer program comprises program instructions, and when the program instructions are executed by an electronic device, the electronic device executes the method according to any one of claims 1 to 6.

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