A method and system for adjusting comfortable brightness of a display screen

Abstract

The present invention discloses a method and system for adjusting the comfortable brightness of a display screen. The present invention comprises the following steps: obtaining the peak brightness of the display screen to be adjusted and the real-time ambient light illumination of the display screen; selecting a brightness mode suitable for the environment in which the display screen is located according to the real-time ambient light illumination; according to the matched brightness mode, for the display screen to be adjusted, according to its peak brightness and real-time ambient light illumination, selecting different reading comfortable brightness quantification models, calculating the most comfortable reading background brightness, the brightness difference between the background and the text, and the brightness of the text, thereby realizing dynamic adjustment of the comfortable brightness of the reading background and text of the display screen under different lighting environments. The present invention can accurately control and adjust the brightness of the reading background and text of the display screen by automatically switching the reading mode, which can significantly improve the user's visual comfort and effectively alleviate the problem of visual fatigue caused by long-term use of the display screen.

Description

Technical Field

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

[0002] In modern society, the use of display screens is rapidly increasing, and their scope of application is expanding. This is particularly true in daily work and learning, where electronic devices such as mobile phones and computers have become indispensable tools. However, as the penetration of display screens continues to grow, problems such as visual fatigue, computer vision syndrome (CVS), and dry eye caused by prolonged display screen use are becoming increasingly prominent. These problems pose a serious threat to visual health and have a significant negative impact on work efficiency and quality of life. These issues have become a core concern for both academia and industry.

[0003] To address the problem of visual fatigue caused by display screen usage, academia and industry have proposed a variety of strategies. For example, improving display hardware performance to improve screen resolution, reduce flicker, and optimize display color performance to reduce eye strain. Industry has also developed and widely applied automatic brightness adjustment technology, which dynamically optimizes screen backlight brightness by sensing ambient light levels and user behavior 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, significantly reducing readability. At the same time, this insufficient brightness adjustment may actually increase the strain on the user's eyes, further causing problems such as visual fatigue.

[0004] Existing research shows that factors that affect visual fatigue during e-reading include not only the technical specifications of the display hardware, but are also closely related to the ambient light intensity, reading background brightness, and the brightness difference between the text and background when the display is used. For example, when the brightness is insufficient or the brightness difference is unadjusted, the user needs to make more visual adjustments, which increases visual fatigue; the personalized needs for brightness adjustment vary significantly depending on the user's visual characteristics and usage environment. However, most of these studies focus on the impact of a single variable and lack in-depth exploration of multivariate interactions. In particular, research on dynamically adjusting brightness differences based on ambient light is relatively scarce, ignoring the fact that the interaction between ambient light intensity, reading background brightness, and text and background brightness difference can also have a significant impact on the user's visual comfort.

[0005] Therefore, existing research provides theoretical support for understanding the regulation of visual comfort, but a comprehensive brightness adjustment model for reading fatigue has yet to be established, failing to meet the complex lighting conditions encountered in real-world applications. Furthermore, adaptive brightness optimization solutions tailored to the peak brightness characteristics of different displays have not been developed, hindering widespread adaptation to different displays. The applicability of these technologies remains significantly limited.

[0006] In summary, to address the visual fatigue caused by insufficient or improper adjustment of display brightness and brightness differences during e-reading, a scientifically based adjustment method that comprehensively considers the relationship between ambient light conditions, display background brightness, and the difference in brightness between text and background is urgently needed. This method should be able to dynamically adapt to different lighting environments and, in combination with the display's peak brightness characteristics, provide a precise and intelligent brightness adjustment solution. This would significantly improve user visual comfort, alleviate visual fatigue, and ultimately achieve the goal of protecting users' 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 brightness of a display screen for comfortable reading based on the illuminance 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 illuminance 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 illuminance 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 screen 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, comprising the following steps:

[0010] S1. Obtaining the peak brightness of the display screen to be adjusted and the real-time ambient light intensity 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 setting the brightness mode of the display screen to a dark mode if the real-time ambient light illumination is in the low illumination interval; and setting the brightness mode of the display screen to a light mode if the real-time ambient light illumination is in the high illumination interval;

[0012] S3. According to the set brightness mode, call the reading comfort brightness quantification model pre-built 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; combined with 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, and the reading comfort brightness quantification 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.

[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, the first illumination threshold is set to 696-697 lux.

[0018] As a preferred embodiment of the first aspect, 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 intensity of the display screen;

[0021] a mode selection module, configured 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; 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; 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. 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; combined with the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, the most comfortable background brightness of the display screen when reading and the most comfortable brightness difference between the text and the background when reading the display screen are calculated, so as to adjust 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 solutions in 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] This invention proposes a method for adjusting the brightness of a display screen for visual comfort based on peak brightness information and ambient light illumination. This method switches reading modes based on light source illumination thresholds, matching the most comfortable reading background brightness and the text-background brightness difference, and dynamically adjusting both text and background brightness to achieve comfortable reading. By automatically switching reading modes and precisely controlling and adjusting the brightness of the display screen's reading background and text, this method significantly improves user visual comfort, effectively alleviating visual fatigue caused by prolonged display use, and providing 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 is shown;

[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 diagram showing the module composition of the display screen comfort 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 objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to 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 than 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 the various embodiments 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 used solely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly specifying the number of technical features being described. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of such 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 consider the impact 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 user's visual comfort when 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 includes the following steps:

[0041] S1. Obtain the peak brightness of the display screen to be adjusted and the real-time ambient light intensity 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, 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-built 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; combined with 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 to be adjusted refers to the maximum brightness level the display can achieve when displaying an image, typically measured in nits. The peak luminance of a display is an inherent property of the device at the time of shipment and can be measured using a spectrophotometer or other device. Furthermore, the real-time ambient illuminance of the display refers to the illuminance of the environment in which the display is located. It represents the luminous flux per unit area and is typically measured in lux. Currently, mobile devices such as mobile phones and tablets generally have built-in ambient light sensors that can detect the real-time ambient illuminance of the display and automatically adjust the backlight brightness. Therefore, if the display to be adjusted is a mobile device, the real-time ambient illuminance information can be measured by the corresponding ambient light sensor. If the display to be adjusted is installed on a PC or other device that does not have an ambient light sensor, an additional ambient light sensor or illuminometer can be used for measurement.

[0045] Therefore, in the present invention, the acquisition of two types of data, 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 illuminance range adapted by the aforementioned adjustment method refers to the ambient light illuminance range within which the adjustment method can effectively achieve comfortable display brightness adjustment. Because display brightness adjustment methods often have a limited scope of application, they often struggle to achieve effective adjustment results in extreme ambient light conditions. The specific ambient light illuminance range adapted by the aforementioned adjustment method can be determined based on actual test data and is not subject to limitation.

[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 using a preset first illumination threshold as the interval segmentation point. The portion below the first illumination threshold is considered the low illumination interval, and the portion above the first illumination threshold is considered the high illumination interval. Point values ​​equal to the first illumination threshold can be divided into any illumination interval without substantially affecting the results. 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, the present invention provides two types of brightness modes, 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 quantification model to adapt to the comfortable brightness adjustment of the display screen in the two modes. However, regardless of which brightness mode is used, the form of the corresponding reading comfort brightness quantification model is basically the same, and both include two sub-models: a background brightness calculation model and a text-background brightness difference calculation model. Both sub-models use the ambient light illumination and the peak brightness of the display screen as independent variables. The background brightness calculation model uses the background brightness as the dependent variable, while the text-background brightness difference calculation model uses the brightness difference between the text and the background as the dependent variable. Therefore, for each brightness mode, the corresponding reading comfort brightness quantification 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 calculates the most comfortable background brightness when reading the display screen, and the text-background brightness difference calculation model calculates the brightness difference between the text and the background when reading the display screen. 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, keeping the background brightness unchanged, adjust the text brightness to the most comfortable text brightness based on the calculated brightness difference between the text and the background for reading. Of course, the background brightness and text brightness can also be adjusted simultaneously, and there is no need to follow a specific 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 this invention is based on a psychophysics experiment. This experiment involved a mixture of light and dark scenarios, specifically five different ambient light illuminance levels typical of indoor and outdoor lighting scenarios: 0 lx, 100 lx, 300 lx, 500 lx, and 1000 lx. Six levels of display background and text brightness were also set: 0 nits, 20 nits, 40 nits, 60 nits, 80 nits, and 100 nits. Reading stimuli were presented using display devices with three different peak brightnesses. The experiment involved 60 participants, each reading under different ambient light conditions using a different display device. The participants rated their visual comfort based on a scale of -3 to 3, representing very uncomfortable to very comfortable reading. Finally, the experimental data was filtered to identify the ambient light illuminance, display peak brightness, and display background and text brightness that gave the highest visual comfort scores for different variable combinations, forming fitted data. Based on this fitted data, the present invention then performed a model fitting to identify the relationships between the variables that achieved the highest visual comfort. 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 illuminance Ea when Lw=531nit; Figure 3 The graph shows the relationship between the background-text brightness difference ∆L and the ambient light intensity Ea when Lw = 531 nit. Figure 4 The graph shows the relationship between text brightness Lt and ambient light illuminance Ea when Lw=531nit; Figure 5 The graph shows the changing relationship between text brightness Lt and background brightness Lb and ambient light illuminance 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 display brightness 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 will require that the brightness gradually increase with the increase of ambient light, and the brightness difference between text and background will also gradually increase. Figure 5 As shown. Therefore, 697 lx can be used as the dividing point for switching between dark mode and light mode. Furthermore, the model was fitted within the range of 0-1000 lx based on experimental data. Therefore, the above-mentioned adjustment method of the present invention can be adapted to an ambient light illumination range of 0-1000 lx, and its performance within this range has been verified. However, it is clear that the present invention can theoretically also be applied to ambient light illumination conditions exceeding 1000 lx, but its effectiveness and accuracy can be further verified through experiments.

[0052] Furthermore, the fitting results show that within the ambient light illumination range of 0–1000 lx, the adjustment method described above exhibits two distinct thresholds: the illuminance threshold of 697 lx, used to demarcate low and high illumination intervals, and the illuminance threshold of 381 lx, used to divide the low illumination interval into two sub-intervals distinguishing between bright and dark environments. However, the fitting data also shows that these two thresholds are not absolute point values; each can be expanded to a corresponding range. The illuminance threshold of 697 lx can be expanded to 696–697 lx, and the illuminance 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 the ambient light intensity and the peak brightness of the display screen as independent variables.

[0054] In an 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 to:

[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 text background brightness and the ambient light illumination Ea is:

[0064]

[0065]

[0066]

[0067] Based on the results of the above psychophysics experiments, and in addition to the display comfort brightness adjustment methods provided in S1-S3, the low-illuminance interval can be further divided into two subintervals by the preset second illuminance threshold of 380-390 lx. Thus, within the entire adapted ambient light illumination range [a, d] = [0, 1000 lx], the reading comfort brightness quantification model is segmented and fitted using the first illuminance threshold c = 696-697 lx and the second illuminance threshold b = 380-390 lx as the two segmentation points. The background brightness calculation model and the text-background brightness difference calculation model in the two subintervals of the low-illuminance interval [0, c] (i.e., [a, b] and [b, c]) and the high-illuminance interval [c, d] are independently fitted using sample data within 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 where the display screen to be adjusted is located 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 applied. If so, 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 so, match dark mode, if not, switch to light mode;

[0073] Step 5: Select different reading comfort brightness quantification 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 peak brightness of the display screen to be adjusted. , 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 to calculate the most suitable comfortable reading background brightness and background-text brightness difference, and then determine the text brightness, where:

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

[0075]

[0076]

[0077]

[0078] If the matched brightness mode is the 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 display screen. 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 visual fatigue problems.

[0085] Similarly, based on the same inventive concept, Figure 7 As shown, another preferred embodiment of the present invention further 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 intensity of the display screen;

[0087] a mode selection module, configured 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; 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; 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. 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; combined with the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, the most comfortable background brightness of the display screen when reading and the most comfortable brightness difference between the text and the background when reading the display screen are calculated, so as to adjust 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 of the above embodiments can essentially be executed through 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, it can implement the display screen comfortable brightness adjustment system method in the above embodiment.

[0091] Similarly, based on the same inventive concept, Figure 8 As shown, another preferred embodiment of the present invention further 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] Furthermore, the logic instructions in the aforementioned memory can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute 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 the display screen comfortable brightness adjustment system method provided in the above embodiment, and the storage medium stores a computer program. 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 understood that the storage medium may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Furthermore, the storage medium may be any medium capable of storing program code, such as a USB flash drive, a mobile hard drive, a magnetic disk, or an optical disk.

[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 brevity 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. In actual implementation, there may be other division methods, for example, 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 example uses a mobile phone display with a peak brightness of 500 nits as the display to be adjusted. The ambient light was set to a consistent correlated color temperature (6500K) and illuminances of 0, 100, 500, and 1000 lx. Twenty subjects participated in this validation experiment and were asked to rate the visual comfort of reading content displayed on the display under different ambient light conditions. The optimal brightness combination was then determined and compared 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 lookup tables. The peak brightness of the display is 531 nits.

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

[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 so, match dark mode, if not, switch to light mode;

[0106] Step 4. Calculate the most comfortable background and text brightness for each ambient light level using the corresponding models DM and LM. Each of the four ambient light levels corresponds to the four most comfortable text and background brightness combinations. Assuming the background and text are neutral colors for reading, the XYZ values ​​of the corresponding colors can be obtained from the text and background brightness values. The corresponding RGB values ​​can then be calculated using 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 illumination 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 this 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 used a 6-point Likert scale to score the visual comfort of these 31 pictures. Finally, the model of the same form proposed by the present invention was fitted based on the experimental data, and the correlation between the model prediction value and the experimental data was 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 scores

[0109]

[0110] As shown in Table 1, the average Pearson correlation between the subjective scores in the dataset and the model's predictions is 0.86, and the RMSE is 0.37, indicating a high degree of model fit. This demonstrates that the present invention is suitable for accurately predicting the most comfortable text and background brightness combination for reading on a display screen between 0 and 1000 lx, and is effective in practice.

[0111] The embodiment described above is only a preferred embodiment of the present invention, but it is not intended to limit the present invention. A person skilled in the art 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 a scene for reading on a portable display device such as a mobile phone, tablet computer, or e-reader, falls within the scope of protection of the present invention.

[0112] The embodiments described above are merely some preferred implementations of the present invention and are not intended to limit the present invention. Persons skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent substitution or equivalent transformation falls within the scope of protection 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 intensity 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 setting the brightness mode of the display screen to a dark mode if the real-time ambient light illumination is in the low illumination interval; and setting the brightness mode of the display screen to a light mode if the real-time ambient light illumination is in the high illumination interval; S3. In accordance with the set brightness mode, a pre-built reading comfort brightness quantification model for the brightness mode is called. The reading comfort brightness quantification model includes a background brightness calculation model and a text-background brightness difference calculation model, both of which use the ambient light illumination and the peak brightness of the display screen as independent variables. The model calculates the most comfortable background brightness for reading on the display screen and the most comfortable brightness difference between the text and the background for reading on the display screen, based on the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, so as to adjust the background brightness and text brightness of the display screen accordingly. The low illumination interval is divided into two subintervals by a preset second illumination threshold, the reading comfort brightness quantization model is segmentedly fitted using the first illumination threshold and the second illumination threshold as two segmentation points, and the background brightness calculation model and the text-background brightness difference calculation model in the two subintervals within the low illumination interval and the high illumination interval are independently fitted using sample data within their respective intervals; 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; 、 、 、 、 、 The fitting coefficients are obtained by fitting the fitting data. The ambient light illuminance, display peak brightness, display background brightness, and text brightness corresponding to the highest visual comfort score under different variable combinations are pre-screened from the experimental data of the psychophysics experiment to form the fitting data. The first illumination threshold is set to 696-697 lux; the second illumination threshold is set to 380-390 lux.

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

3. 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 intensity of the display screen; a mode selection module, configured to divide the ambient light illumination range adapted by the adjustment system into a low illumination interval and a high illumination interval based on 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; 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; 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; A brightness adjustment module is configured to, in accordance with a set brightness mode, invoke a pre-built reading comfort brightness quantification model for that brightness mode, the model comprising a background brightness calculation model and a text-background brightness difference calculation model, both of which use ambient light illumination and display screen peak brightness as independent variables; and calculate the most comfortable background brightness for reading on the display screen, as well as the most comfortable brightness difference between the text and background on the display screen, based on the real-time ambient light illumination and the peak brightness of the display screen to be adjusted, thereby adjusting the background brightness and text brightness of the display screen accordingly. The low illumination interval is divided into two subintervals by a preset second illumination threshold, the reading comfort brightness quantization model is segmentedly fitted using the first illumination threshold and the second illumination threshold as two segmentation points, and the background brightness calculation model and the text-background brightness difference calculation model in the two subintervals within the low illumination interval and the high illumination interval are independently fitted using sample data within their respective intervals; 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; 、 、 、 、 、 The fitting coefficients are obtained by fitting the fitting data. The ambient light illuminance, display peak brightness, display background brightness, and text brightness corresponding to the highest visual comfort score under different variable combinations are pre-screened from the experimental data of the psychophysics experiment to form the fitting data. The first illumination threshold is set to 696-697 lux; the second illumination threshold is set to 380-390 lux.

4. The display screen comfortable brightness adjustment system according to claim 3, characterized in that: The ambient light illumination range adapted by the adjustment system is set to 0 to 1000 lux.

5. 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 claimed in claim 1 or 2 is implemented.

6. A computer electronic device, characterized in that: including memory and processor; The memory is used to store computer programs; The processor is configured to implement the method for adjusting the comfortable brightness of a display screen as claimed in claim 1 or 2 when executing the computer program.

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