Comfortable brightness adjusting method and system for display screen

Abstract

The invention discloses a method and a system for adjusting comfortable brightness of a display screen. The method comprises the following steps: obtaining the peak brightness of a display screen to be adjusted and the real-time environment illuminance of the display screen; selecting a brightness mode suitable for the environment where the display screen is located according to the real-time environment illuminance; according to the matched brightness mode, for a display screen to be adjusted, different reading comfort brightness quantification models are selected according to the peak brightness and the real-time environment illuminance of the display screen, and the most comfortable reading background brightness, the brightness difference between the background and the characters and the brightness of the characters are calculated; therefore, the comfortable brightness of the reading backgrounds and characters of the display screen in different illumination environments can be dynamically adjusted. According to the method and the device, the reading background and the character brightness of the display screen can be accurately controlled and adjusted by automatically switching the reading modes, so that the visual comfort of a user can be remarkably improved, and the problem of asthenopia caused by using the display screen for a long time is effectively relieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of display screen brightness adjustment, and in particular relates to a method and system for adjusting the background comfortable brightness and text comfortable brightness of a display screen for reading based on peak brightness information of the display screen and ambient light illumination. Background Art

[0002] In modern society, the frequency of display screen usage is increasing rapidly, and the scope of application is expanding. Especially in daily work and study, electronic devices such as mobile phones and computers have become indispensable tools. However, with the increasing popularity of display screens, problems such as visual fatigue, computer vision syndrome (CVS) and dry eyes caused by long-term use of display screens have become increasingly prominent, seriously threatening people's visual health and having a significant negative impact on work efficiency and quality of life. The emergence of these problems has become a core topic of common concern in academia and industry.

[0003] In order to solve the problem of visual fatigue caused by the use of display screens, academia and industry have proposed a variety of coping strategies. For example, by improving the hardware performance of the display screen to improve screen resolution, reduce flicker, and optimize display color performance, the burden on the eyes can be reduced. The industry has also developed and widely used automatic brightness adjustment technology, which dynamically optimizes the screen backlight brightness by sensing the ambient light intensity and user behavior habits to match the user's personalized eye needs. However, these solutions still have certain limitations in practical applications. Especially when reading in darker environments, automatic brightness adjustment often sacrifices the clarity of the displayed content, greatly reducing readability. At the same time, this insufficient brightness adjustment may increase the user's eye pressure and further cause problems such as visual fatigue.

[0004] Existing studies have shown that factors that affect visual fatigue during electronic reading include not only the technical indicators of the display hardware, but are also closely related to the ambient light illumination, reading background brightness, and brightness difference between text and background when using the display. For example, when the brightness is insufficient or the brightness difference is unadjusted, users need to make more visual adjustments, which increases visual fatigue; the personalized needs for brightness adjustment vary significantly due to differences in user visual characteristics and usage environment. However, most of these studies focus on the impact of a single variable and lack in-depth discussion of multivariate interactions, especially research on dynamically adjusting brightness differences based on ambient light. This ignores the fact that the interaction between ambient light illumination, reading background brightness, and brightness difference between text and background can also have a significant impact on user visual comfort.

[0005] Therefore, existing research provides theoretical support for understanding the adjustment of visual comfort, but a comprehensive brightness adjustment model for reading visual fatigue has not yet been established, which cannot meet the needs of complex light environments in actual application scenarios. It also fails to provide an adaptive brightness optimization solution for the peak brightness characteristics of different display screens, and cannot be widely adapted to different display screens. The applicability of related technologies at this stage still has great limitations.

[0006] In summary, in order to solve the problem of visual fatigue caused by insufficient or improper adjustment of display brightness and brightness difference during electronic reading, an adjustment method based on scientific theory and comprehensive consideration of the relationship between ambient light conditions, display background brightness, and text and background brightness difference is urgently needed. This method should be able to dynamically adapt to different light environments and provide an accurate and intelligent brightness adjustment solution in combination with the peak brightness characteristics of the display, thereby significantly improving the user's visual comfort, alleviating visual fatigue, and ultimately achieving the goal of protecting the user's vision health and optimizing the user experience. Summary of the invention

[0007] The purpose of the present invention is to solve the above-mentioned problems in the prior art, and to propose a method and system for adjusting the comfortable brightness of a display screen for reading based on the illumination properties of ambient light and the peak brightness characteristics of the display screen. The present invention aims to switch the reading mode according to the illumination threshold of the light source, match the most comfortable reading background brightness and the text background brightness difference, and dynamically adjust the text brightness and background brightness to achieve the purpose of comfortable reading by comprehensively considering the illumination properties of the ambient light and the peak brightness characteristics of the display screen when using electronic products for text reading. By automatically switching the reading mode and accurately controlling and adjusting the brightness of the display reading background and text, the present invention can significantly improve the user's visual comfort, effectively alleviate the problem of visual fatigue caused by long-term use of the display screen, and provide users with a healthier and more intelligent human-computer interaction experience.

[0008] The technical solutions specifically adopted in the present invention are as follows:

[0009] In a first aspect, the present invention provides a method for adjusting the comfortable brightness of a display screen, which comprises the following steps:

[0010] S1, obtaining the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen;

[0011] S2, dividing the ambient light illumination range adapted by the adjustment method into a low illumination interval and a high illumination interval by a preset first illumination threshold, selecting a brightness mode applicable to the environment in which the display screen is located according to the real-time ambient light illumination, and if the real-time ambient light illumination is in the low illumination interval, setting the brightness mode of the display screen to a dark mode, and if the real-time ambient light illumination is in the high illumination interval, setting the brightness mode of the display screen to a light mode;

[0012] S3. According to the set brightness mode, call the reading comfort brightness quantification model pre-constructed for the brightness mode, the reading comfort brightness quantification model includes a background brightness calculation model and a text-background brightness difference calculation model, both of which take the ambient light illumination and the peak brightness of the display screen as independent variables; combine the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, calculate the most comfortable background brightness when reading the display screen and the most comfortable brightness difference between the text and the background when reading the display screen, so as to adjust the background brightness and text brightness of the display screen accordingly.

[0013] As a preferred embodiment of the first aspect, the background brightness calculation model is in the form of The text-background brightness difference calculation model is in the form of ,in is the peak brightness of the display to be adjusted, is the real-time ambient light illumination.

[0014] As a preferred embodiment of the above-mentioned first aspect, the low illumination interval is divided into two sub-intervals by a preset second illumination threshold, the reading comfort brightness quantization model is segmentedly fitted with the first illumination threshold and the second illumination threshold as two segmentation points, and the two sub-intervals in the low illumination interval and the background brightness calculation model and the text-background brightness difference calculation model in the high illumination interval are independently fitted using sample data in their respective intervals.

[0015] As a preferred embodiment of the first aspect, the background brightness calculation model is in the form of The text-background brightness difference calculation model is in the form of ,in is the peak brightness of the display to be adjusted, is the real-time ambient light illumination.

[0016] As a preferred embodiment of the first aspect above, the ambient light illumination range adapted by the adjustment method is set to 0 to 1000 lux.

[0017] As a preferred embodiment of the first aspect above, the first illumination threshold is set to 696-697 lux.

[0018] As a preferred embodiment of the first aspect above, the second illumination threshold is set to 380-390 lux.

[0019] In a second aspect, the present invention provides a display screen comfortable brightness adjustment system, comprising:

[0020] An information acquisition module is used to obtain the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen;

[0021] A mode selection module, used to divide the ambient light illumination range adapted by the adjustment method into a low illumination interval and a high illumination interval by a preset first illumination threshold, and select a brightness mode applicable to the environment in which the display screen is located according to the real-time ambient light illumination, and if the real-time ambient light illumination is in the low illumination interval, the brightness mode of the display screen is set to a dark mode, and if the real-time ambient light illumination is in the high illumination interval, the brightness mode of the display screen is set to a light mode;

[0022] The brightness adjustment module is used to call a reading comfort brightness quantification model pre-built for the brightness mode according to the set brightness mode, wherein the reading comfort brightness quantification model includes a background brightness calculation model and a text-background brightness difference calculation model, both of which take the ambient light illumination and the peak brightness of the display screen as independent variables; combining the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, the most comfortable background brightness when reading the display screen and the most comfortable brightness difference between the text and the background when reading the display screen are calculated, thereby adjusting the background brightness and text brightness of the display screen accordingly.

[0023] In a third aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for adjusting the comfortable brightness of a display screen as described in any one of the schemes of the first aspect above is implemented.

[0024] In a fourth aspect, the present invention provides a computer electronic device comprising a memory and a processor;

[0025] The memory is used to store computer programs;

[0026] The processor is used to implement the method for adjusting the comfortable brightness of a display screen as described in any one of the solutions of the first aspect above when executing the computer program.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention proposes a method for adjusting the visual comfort brightness of a display screen based on peak brightness information and ambient light illumination. The method can realize switching of the reading mode according to the light source illumination threshold, match the most comfortable reading background brightness and the text background brightness difference, dynamically adjust the text brightness and background brightness, and achieve the purpose of comfortable reading. The present invention can automatically switch the reading mode, accurately control and adjust the brightness of the display reading background and text, and can significantly improve the visual comfort of the user, effectively alleviate the visual fatigue problem caused by long-term use of the display screen, and provide users with a healthier and more intelligent human-computer interaction experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the steps of the method for adjusting the comfortable brightness of a display screen according to the present invention;

[0030] Figure 2 This is the relationship between the background brightness Lb and the ambient light illumination Ea when Lw=531nit;

[0031] Figure 3 When Lw=531nit, the relationship between the background-text brightness difference ∆L and the ambient light illumination Ea;

[0032] Figure 4 When Lw=531nit, the relationship between the text brightness Lt and the ambient light illumination Ea;

[0033] Figure 5 When Lw=531nit, the relationship between the text brightness Lt and background brightness Lb and the ambient light illumination Ea;

[0034] Figure 6 A logical flow diagram of a method for adjusting the comfortable brightness of a display screen;

[0035] Figure 7 This is a module composition diagram of the display screen comfortable brightness adjustment system of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of computer electronic equipment. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The technical features in each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0038] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for the purpose of distinguishing descriptions, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0039] The present invention aims to provide a method for adjusting the brightness of a display screen for visual comfort based on peak brightness information and ambient light illumination. The method can switch the reading mode according to the light source illumination threshold, and take into account the influence of the brightness difference between text and background on visual comfort when reading text. The method can automatically match the most comfortable reading background brightness and text brightness under the light source illumination, thereby improving the visual comfort of the user's reading.

[0040] like Figure 1 As shown, in a preferred embodiment of the present invention, a method for adjusting the comfortable brightness of a display screen is provided, which comprises the following steps:

[0041] S1. Obtain the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen.

[0042] S2. Divide the ambient light illumination range adapted by the adjustment method into a low illumination interval and a high illumination interval by a preset first illumination threshold value, and select a brightness mode suitable for the environment in which the display screen is located according to the real-time ambient light illumination; if the real-time ambient light illumination is in the low illumination interval, set the brightness mode of the display screen to a dark mode; if the real-time ambient light illumination is in the high illumination interval, set the brightness mode of the display screen to a light mode.

[0043] S3. According to the set brightness mode, call the reading comfort brightness quantification model pre-constructed for the brightness mode, the reading comfort brightness quantification model includes a background brightness calculation model and a text-background brightness difference calculation model, both of which take the ambient light illumination and the peak brightness of the display screen as independent variables; combine the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, calculate the most comfortable background brightness when reading the display screen and the most comfortable brightness difference between the text and the background when reading the display screen, so as to adjust the background brightness and text brightness of the display screen accordingly.

[0044] It should be noted that the peak luminance of the display screen to be adjusted refers to the highest brightness level that the display screen can reach when displaying an image, usually measured in nits. The peak brightness of the display screen is an inherent property of the device when it leaves the factory, and can be measured and determined by a spectrophotometer or other equipment. In addition, the real-time ambient light illuminance of the display screen refers to the illuminance of the environment in which the display screen is located, representing the luminous flux received per unit area, usually measured in lux. At present, mobile devices such as mobile phones and tablets generally have built-in ambient light sensors that can sense the real-time ambient light illuminance of the display screen, thereby automatically adjusting the backlight brightness of the display screen. Therefore, if the display screen to be adjusted is a display screen mounted on a mobile device, the real-time ambient light illuminance information can be measured by the corresponding ambient light sensor. If the display screen to be adjusted is mounted on a PC or other device that does not contain an ambient light sensor, it can be measured using an additional ambient light illuminance sensor or illuminance meter or other equipment.

[0045] Therefore, the acquisition of two types of data in the present invention, namely, the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen, can be understood as reading the measured data, or as calling the hardware device to collect data online in real time, without limitation.

[0046] In addition, the ambient light illumination range adapted by the above adjustment method refers to the ambient light illumination range in which the adjustment method can be used to better achieve comfortable brightness adjustment of the display screen. Because the comfortable brightness adjustment method of the display screen often has its scope of application, when the ambient light illumination is in some extreme scenes, the method often finds it difficult to achieve a good adjustment effect. The specific ambient light illumination range adapted by the above adjustment method can be determined based on actual test data, and there is no restriction on this.

[0047] The ambient light illumination range adapted by the above adjustment method can be divided into a low illumination interval and a high illumination interval by a preset first illumination threshold as an interval segmentation point. The portion below the first illumination threshold is regarded as a low illumination interval, and the portion above the first illumination threshold is regarded as a high illumination interval. The point value equal to the first illumination threshold can be divided into any illumination interval without having a substantial impact on the result. The specific value of the above first illumination threshold can also be optimized and determined based on actual test data, and there is no restriction on this.

[0048] In addition, two types of brightness modes are set in the present invention, namely dark mode and light mode. The comfortable brightness adjustment strategies of the display screen in the two modes are different. Therefore, it is necessary to pre-build a reading comfort brightness quantization model to adapt the comfortable brightness adjustment of the display screen in the two modes. However, no matter which brightness mode is used, the form of the corresponding reading comfort brightness quantization model is basically the same, and both include two sub-models, namely the background brightness calculation model and the text background brightness difference calculation model. Both sub-models take the ambient light illumination and the peak brightness of the display screen as independent variables, the background brightness calculation model takes the background brightness as the dependent variable, and the text background brightness difference calculation model takes the brightness difference between the text and the background as the dependent variable. Therefore, for each brightness mode, the corresponding reading comfort brightness quantization model can be called. Based on the peak brightness of the display screen to be adjusted obtained in S1 and the real-time ambient light illumination of the display screen, the background brightness calculation model is used to calculate the most comfortable background brightness when the display screen is read, and the text background brightness difference calculation model is used to calculate the brightness difference between the text and the background when the display screen is read. Thus, the brightness of the text on the display screen can be determined by the background brightness and the brightness difference. When adjusting the display brightness, you can first adjust the display to the most comfortable background brightness for reading, then keep the background brightness unchanged, and adjust the text brightness of the display to the most comfortable text brightness based on the calculated brightness difference between the text and the background for reading on the display. Of course, the background brightness and text brightness can also be adjusted synchronously, and there is no need to have a certain order.

[0049] In order to better understand the essence of the above technical solution of the present invention, the principle of the technical solution is introduced below.

[0050] The technical solution proposed in the present invention is designed based on a psychophysical experiment. The experiment sets up light and dark scenes, and specifically sets 5 different ambient light illumination levels for commonly used indoor and outdoor lighting scenes: 0 lx, 100 lx, 300 lx, 500 lx, 1000 lx; ​​in addition, 6 levels of display screen background brightness and text brightness are set at 0 nits, 20 nits, 40 nits, 60 nits, 80 nits, 100 nits; and a display device with 3 different peak brightnesses is used to present reading stimuli. The experiment selected 60 subjects to participate, and each subject used a different display device to read under different ambient lights, and scored the visual comfort of the presented content, with a score range of -3 points to 3 points, representing very uncomfortable to very comfortable. Finally, the ambient light illumination, display screen peak brightness, display screen background brightness and text brightness corresponding to the highest visual comfort score under different variable combinations are screened out from the experimental data to form fitting data. The present invention performs model fitting based on the fitting data to find the relationship between the variables when the visual comfort is the highest. The model fitting results are as follows Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, Figure 2 The graph shows the relationship between background brightness Lb and ambient light illumination Ea when Lw=531nit; Figure 3 The graph shows the relationship between the background-text brightness difference ∆L and the ambient light illumination Ea when Lw=531nit; Figure 4 The graph shows the relationship between the text brightness Lt and the ambient light illumination Ea when Lw=531nit; Figure 5 The graph shows the changing relationship between the text brightness Lt and background brightness Lb and the ambient light illumination Ea when Lw=531nit.

[0051] like Figure 2As shown in the figure, when the peak brightness of the display is 531nit, the relationship between the ambient light illuminance Ea and the background brightness Lb of the display can be obtained based on the experimental data. When the ambient light illuminance is lower than 381 lx, it is usually a dark light environment. The ambient light has a greater impact on the display. The human eye's demand for display brightness in a dark light environment usually increases linearly with the increase of ambient light. After exceeding this range, the impact of ambient light on the brightness of the display is not as significant as in a dark light environment. Maintaining the background brightness unchanged will keep the visual comfort at a high level. Therefore, the ambient light illuminance of 381 lx can be used as a dividing point between light and dark environments to make the regulation more in line with the subjective visual needs of the human eye. When the ambient light exceeds 697 lx, the impact of ambient light on the background brightness and brightness contrast of the display becomes greater. The visual comfort of the human eye requires that the brightness gradually increases with the increase of ambient light, and the brightness difference between text and background also gradually increases, such as Figure 5 As shown. Therefore, 697 lx can be used as the dividing point for switching between dark mode and light mode. In addition, the model is fitted in the range of 0~1000lx based on experimental data, so the ambient light illumination range adapted by the above-mentioned adjustment method of the present invention can be set to 0~1000 lx, and the performance in this range has been verified. However, it is obvious that in theory, the ambient light illumination condition exceeding 1000 lx can also be applied to the present invention, but its effectiveness and accuracy can be further verified by experiments.

[0052] In addition, from the above fitting results, it can be seen that within the ambient light illumination range of 0~1000 lx adapted by the above adjustment method, there are two obvious threshold points, namely, the illumination threshold of 697 lx used to divide the low illumination interval and the high illumination interval, and the illumination threshold of 381 lx used to divide the low illumination interval into two sub-intervals to distinguish between light and dark environments. However, it can be seen from the fitting data that these two thresholds are not completely absolute point values, and each can be expanded to a corresponding interval value, among which the illumination threshold of 697 lx can be expanded to 696~697 lx, and the illumination threshold of 381 lx can be expanded to 380~390 lx.

[0053] In addition, based on the above fitting results, the reading comfort brightness quantification model can be decomposed into a background brightness calculation model and a text-background brightness difference calculation model. The two calculation models can theoretically be fitted using nonlinear statistical models, neural networks, etc., as long as they can accurately predict their respective dependent variables based on ambient light illumination and display peak brightness as independent variables.

[0054] In the embodiment of the present invention, after screening the fitting model form, the form of the background brightness calculation model can be optimized to be:

[0055]

[0056] The form of the text-background brightness difference calculation model can be optimized as follows:

[0057]

[0058] in: is the peak brightness of the display to be adjusted, The real-time ambient light intensity of the display screen to be adjusted.

[0059] According to the specific forms of the above two fitting models, based on the above Figure 1 The corresponding fitting data can be fitted to obtain the background brightness calculation model between the background brightness Lb and the ambient light illumination Ea as follows:

[0060]

[0061]

[0062]

[0063] Similarly, based on the above Figure 2 The corresponding fitting data can be fitted to obtain the background-text brightness difference The calculation model of the text background brightness difference between the ambient light illumination Ea is:

[0064]

[0065]

[0066]

[0067] Based on the results of the above psychophysical experiments, on the basis of the display screen comfortable brightness adjustment method provided by S1~S3 above, the low illumination interval can be further divided into two sub-intervals by the preset second illumination threshold 380~390lx. Therefore, within the entire adapted ambient light illumination range [a,d]= [0,1000lx], the reading comfort brightness quantification model is segmentedly fitted with the first illumination threshold c=696~697lx and the second illumination threshold b=380~390lx as two segmentation points, and the background brightness calculation model and the text background brightness difference calculation model in the two sub-intervals of the low illumination interval [0,c] (i.e. [a,b] and [b,c]) and the high illumination interval [c,d] are independently fitted with the sample data in their respective intervals.

[0068] Therefore, in the embodiment of the present invention, based on the above fitting formula, the overall processing logic flow of the display screen comfortable brightness adjustment method is as follows: Figure 6 As shown, the specific process is:

[0069] Step 1: Measure the peak brightness of the display to be adjusted ;

[0070] Step 2: Measure the illumination of the ambient light around the display ;

[0071] Step 3: Determine the illumination of the ambient light of the display screen to be adjusted Whether it is within the scope adapted by the adjustment method of the present invention, that is, whether a ≤ Ea ≤ d is established. If not, the present invention is not applicable. If yes, proceed to the next step;

[0072] Step 4: Determine the brightness mode applicable to the environment where the display is located, that is, determine the illumination of the ambient light source < Whether c is true, if true, match the dark mode, if not true, switch to light mode;

[0073] Step 5: Select different reading comfort brightness quantization models according to the matched brightness mode, and convert the peak brightness of the display screen to be adjusted obtained in steps 1 and 2 into , The illumination of the ambient light where the display screen is to be adjusted Substitute the reading comfort brightness quantification model under different brightness modes, calculate the most matching comfortable reading background brightness and background-text brightness difference, and then determine the text brightness, where:

[0074] If the matched brightness mode is the dark mode, the reading comfort brightness quantitative model DM in the dark mode is used for calculation. The specific calculation formula of the model DM is as follows:

[0075]

[0076]

[0077]

[0078] If the matched brightness mode is a light color mode, the reading comfort brightness quantitative model LM is used for calculation. The specific calculation formula of the model LM is as follows:

[0079]

[0080]

[0081]

[0082] in is the white point brightness of the display to be adjusted, is the illuminance of the ambient light source, Is the background brightness of the display screen showing the reading picture, It is the brightness difference between the text and the background of the reading screen displayed on the display. It is the brightness of the text on the display screen.

[0083] When the background brightness of the display is determined and text brightness After that, you can adjust the brightness of the display screen accordingly. The order of adjustment is not limited. Generally, you can adjust the background brightness of the display screen to , and then adjust the text brightness of the display to , of course, both can be adjusted at the same time.

[0084] Therefore, the above method of the present invention can dynamically adapt to different light environments, and provide a precise and intelligent brightness adjustment solution in combination with the peak brightness characteristics of the display screen, thereby significantly improving the user's visual comfort and alleviating the problem of visual fatigue.

[0085] Similarly, based on the same inventive concept, Figure 7 As shown, another preferred embodiment of the present invention also provides a display screen comfortable brightness adjustment system, which includes:

[0086] An information acquisition module is used to obtain the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen;

[0087] A mode selection module, used to divide the ambient light illumination range adapted by the adjustment method into a low illumination interval and a high illumination interval by a preset first illumination threshold, and select a brightness mode applicable to the environment in which the display screen is located according to the real-time ambient light illumination, and if the real-time ambient light illumination is in the low illumination interval, the brightness mode of the display screen is set to a dark mode, and if the real-time ambient light illumination is in the high illumination interval, the brightness mode of the display screen is set to a light mode;

[0088] The brightness adjustment module is used to call a reading comfort brightness quantification model pre-built for the brightness mode according to the set brightness mode, wherein the reading comfort brightness quantification model includes a background brightness calculation model and a text-background brightness difference calculation model, both of which take the ambient light illumination and the peak brightness of the display screen as independent variables; combining the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, the most comfortable background brightness when reading the display screen and the most comfortable brightness difference between the text and the background when reading the display screen are calculated, thereby adjusting the background brightness and text brightness of the display screen accordingly.

[0089] It should also be noted that the display screen comfortable brightness adjustment system described in S1 to S4 in the above embodiments can essentially be executed by a computer program or module.

[0090] Therefore, similarly, based on the same inventive concept, another preferred embodiment of the present invention also provides a computer program product corresponding to the display screen comfortable brightness adjustment system method provided in the above embodiment, including a computer program / instruction. When the computer program / instruction is executed by the processor, the display screen comfortable brightness adjustment system method in the above embodiment can be implemented.

[0091] Similarly, based on the same inventive concept, Figure 8 As shown, another preferred embodiment of the present invention also provides a computer electronic device corresponding to the display screen comfortable brightness adjustment system method provided in the above embodiment, which includes a memory and a processor;

[0092] The memory is used to store computer programs;

[0093] The processor is used to implement the display screen comfortable brightness adjustment system method in the above embodiment when executing the computer program.

[0094] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention.

[0095] Therefore, based on the same inventive concept, another preferred embodiment of the present invention also provides a computer-readable storage medium corresponding to a display screen comfortable brightness adjustment system method provided in the above embodiment, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the display screen comfortable brightness adjustment system method in the above embodiment can be implemented.

[0096] It is understandable that the above storage medium may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage. The storage medium may also be a U disk, a mobile hard disk, a magnetic disk or an optical disk, etc., which can store program codes.

[0097] It is understandable that the above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0098] It should also be noted that those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the system described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. In the various embodiments provided in this application, the division of steps or modules in the system and method is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules or steps can be combined or integrated together, and a module or step can also be split.

[0099] The following will use a specific embodiment to demonstrate and verify the specific technical effects of the display screen comfortable brightness adjustment system method described in S1 to S4 above.

[0100] Example

[0101] This embodiment uses a mobile phone display screen with a peak brightness of 500nit as the display screen to be adjusted. The ambient light is set to a light source with the same correlated color temperature (6500K) and illuminances of 0, 100, 500, and 1000lx. 20 subjects participated in this verification experiment. The subjects were asked to score the visual comfort of the reading content displayed on the display screen under different ambient lights, so as to evaluate the most comfortable brightness combination and compare it with the combination predicted by the model.

[0102] The process of the verification experiment is as follows:

[0103] Step 1. First, measure the peak brightness of the display to be adjusted, and calibrate it using a display color correction model such as Gamma, GOG, or 1D and 3D comparison tables to obtain a peak brightness of 531 nit for the display.

[0104] Step 2. Then according to step 3 of the present invention, it is determined that when the ambient light illumination is 0, 100, 500, and 1000 lx respectively, the present invention is applicable.

[0105] Step 3: According to step 4 of the present invention, determine the brightness mode adapted to the ambient light of the display screen, that is, determine the illumination of the ambient light source < 697lx is true, if true, match the dark mode, if not true, switch to light mode;

[0106] Step 4. Calculate the most comfortable background brightness and text brightness of the display screen under each ambient light according to the corresponding models DM and LM. The four ambient lights correspond to the four most comfortable text and background brightness combinations. Assuming that the background and text colors used for reading are neutral colors, the XYZ value of the corresponding color can be obtained according to the brightness values ​​of the text and background, and the corresponding RGB value can be calculated according to the GOG model.

[0107] Step 5. According to the process, the most comfortable text and background combination pictures of the display screen under light sources with illuminations of 0, 100, 500, and 1000lx are as follows, with a total of 4 pictures. Set up 4 groups of experiments, each group contains a most comfortable picture, in addition to the picture, it also contains 30 text and background combination pictures composed of neutral colors of different levels, and the reading material on the picture is a poem. 20 subjects conducted 4 groups of experiments respectively, and the visual comfort of these 31 pictures was scored using a 6-point Likert scale. Finally, the model of the same form proposed by the present invention is fitted according to the experimental data, and the correlation between the model prediction value and the experimental data is determined, as shown in Table 1. According to the results, it can be obtained that the picture predicted by the model to be the most comfortable is also the picture with the highest subjective score.

[0108] Table 1 Correlation between model prediction values ​​and subjective scoring values

[0109]

[0110] According to the data in Table 1, the average Pearson correlation between the subjective score value of the data set and the model prediction value is 0.86, and the RMSE is 0.37, which indicates that the model has a high degree of fit. It can be seen that the present invention is suitable for accurately predicting the most comfortable brightness combination of text and background when reading on a display screen at 0-1000 lx, and the actual effect is effective.

[0111] The above-described embodiment is only a preferred solution of the present invention, but it is not intended to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation, which may be applied to mobile phones, tablet computers, electronic readers and other portable display devices for reading, falls within the protection scope of the present invention.

[0112] The above-described embodiments are only some preferred implementations of the present invention, but are not intended to limit the present invention. A person skilled in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A method for adjusting the comfortable brightness of a display screen, characterized in that: The following steps are involved: S1, obtaining the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen; S2, dividing the ambient light illumination range adapted by the adjustment method into a low illumination interval and a high illumination interval by a preset first illumination threshold, selecting a brightness mode applicable to the environment in which the display screen is located according to the real-time ambient light illumination, and if the real-time ambient light illumination is in the low illumination interval, setting the brightness mode of the display screen to a dark mode, and if the real-time ambient light illumination is in the high illumination interval, setting the brightness mode of the display screen to a light mode; S3. According to the set brightness mode, call the reading comfort brightness quantification model pre-constructed for the brightness mode, the reading comfort brightness quantification model includes a background brightness calculation model and a text-background brightness difference calculation model, both of which take the ambient light illumination and the peak brightness of the display screen as independent variables; combine the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, calculate the most comfortable background brightness when reading the display screen and the most comfortable brightness difference between the text and the background when reading the display screen, so as to adjust the background brightness and text brightness of the display screen accordingly.

2. The method for adjusting the comfortable brightness of a display screen according to claim 1, characterized in that: The background brightness calculation model is in the form of The text-background brightness difference calculation model is in the form of ,in is the peak brightness of the display to be adjusted, is the real-time ambient light illumination.

3. The method for adjusting the comfortable brightness of a display screen according to claim 1, characterized in that: The low illumination interval is divided into two sub-intervals by a preset second illumination threshold. The reading comfort brightness quantization model is segmentedly fitted with the first illumination threshold and the second illumination threshold as two segmentation points. The two sub-intervals in the low illumination interval and the background brightness calculation model and the text-background brightness difference calculation model in the high illumination interval are independently fitted using sample data in their respective intervals.

4. The method for adjusting the comfortable brightness of a display screen according to claim 3, characterized in that: The background brightness calculation model is in the form of The text-background brightness difference calculation model is in the form of ,in is the peak brightness of the display to be adjusted, is the real-time ambient light illumination.

5. The method for adjusting the comfortable brightness of a display screen according to claim 1, characterized in that: The ambient light illumination range adapted by the adjustment method is set to 0 to 1000 lux.

6. The method for adjusting the comfortable brightness of a display screen according to claim 3, characterized in that: The first illumination threshold is set to 696-697 lux.

7. The method for adjusting the comfortable brightness of a display screen according to claim 3, characterized in that: The second illumination threshold is set to 380-390 lux.

8. A display screen comfortable brightness adjustment system, characterized in that: include: An information acquisition module is used to obtain the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen; A mode selection module, used to divide the ambient light illumination range adapted by the adjustment method into a low illumination interval and a high illumination interval by a preset first illumination threshold, and select a brightness mode applicable to the environment in which the display screen is located according to the real-time ambient light illumination, and if the real-time ambient light illumination is in the low illumination interval, the brightness mode of the display screen is set to a dark mode, and if the real-time ambient light illumination is in the high illumination interval, the brightness mode of the display screen is set to a light mode; The brightness adjustment module is used to call a reading comfort brightness quantification model pre-built for the brightness mode according to the set brightness mode, wherein the reading comfort brightness quantification model includes a background brightness calculation model and a text-background brightness difference calculation model, both of which take the ambient light illumination and the peak brightness of the display screen as independent variables; combining the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, the most comfortable background brightness when reading the display screen and the most comfortable brightness difference between the text and the background when reading the display screen are calculated, thereby adjusting the background brightness and text brightness of the display screen accordingly.

9. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the method for adjusting the comfortable brightness of a display screen as described in any one of claims 1 to 7 is implemented.

10. A computer electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is used to implement the comfortable brightness adjustment method for a display screen as described in any one of claims 1 to 7 when executing the computer program.

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