Display screen for inhibiting light-emitting diode (LED) light pollution and control method thereof

Abstract

The invention discloses a display screen for inhibiting LED light pollution and a control method thereof, and relates to the technical field of display control. The method comprises the following steps: acquiring environmental parameters of the position of the LED display screen, and estimating the visibility of the LED display screen according to the environmental parameters; according to the visibility, determining a target wavelength of the LED display screen; according to the target wavelength and preset highest brightness, determining a display brightness range of the LED display screen, the highest brightness being less than or equal to a brightness threshold value causing light pollution to human eyes; and determining target brightness according to the display brightness range and the environmental parameters, and adjusting the LED display screen according to the target brightness and the target wavelength. By implementing the technical scheme provided by the invention, the display effect of the LED display screen can be ensured while the light pollution is reduced.

Description

Technical Field

[0001] The present application relates to the field of display control technology, and in particular to a display screen for suppressing LED light pollution and a control method thereof. Background Art

[0002] With the rapid development of science and technology, LED display screens have replaced traditional billboards and are increasingly widely used. LED display screens are a display technology that uses light emitting diodes (LEDs) as display units. They are composed of many small LEDs, which control the light emission state and brightness of the LEDs to display images, texts and other content. With the advantages of high brightness and high refresh rate, LED display screens have become the leader in the field of outdoor advertising screens.

[0003] However, with the increase in large-scale use of LED screens, the problem of light pollution has attracted people's attention. For example, in order to obtain good visibility in outdoor environments, LED screens are often set to a higher brightness. Excessive light intensity will cause light to directly shine on the surrounding environment, interfering with people's visual experience and daily routines. In order to reduce light pollution, the brightness of LED screens may be adjusted to a lower level, but this may affect the visibility and visual effects of graphics and text on the display, resulting in poor LED display effects. Summary of the invention

[0004] The present application provides a display screen for suppressing LED light pollution and a control method thereof, which can reduce light pollution while ensuring the display effect of the LED display screen.

[0005] In a first aspect, the present application provides a control method for suppressing LED light pollution, the method comprising: Acquire environmental parameters of the location of the LED display screen, and estimate the visibility of the LED display screen according to the environmental parameters; Determining a target wavelength of the LED display screen according to the visibility; Determine the display brightness range of the LED display screen according to the target wavelength and the preset maximum brightness, wherein the maximum brightness is less than or equal to a brightness threshold that causes light pollution to human eyes; According to the display brightness range and the environmental parameters, a target brightness is determined, and the LED display screen is adjusted according to the target brightness and the target wavelength.

[0006] By adopting the above technical solution, the target wavelength and brightness range of the LED display are determined according to environmental parameters and visibility estimation to optimize the display effect, provide clear visibility and visual graphics, and avoid light pollution to the human eye caused by the LED display by presetting the maximum brightness and controlling it within an appropriate range, thereby protecting the visual health of the observer. According to the actual environmental parameters and the display brightness range, the brightness and wavelength of the LED display are adjusted to adapt to different environmental requirements, thereby reducing light pollution while ensuring the display effect of the LED display.

[0007] Optionally, the obtaining of environmental parameters of the location where the LED display screen is located, and estimating the visibility of the LED display screen according to the environmental parameters, includes: obtaining environmental parameters of the location where the LED display screen is located within a preset range; performing data preprocessing and standardization on the environmental parameters to obtain target environmental parameters; The target environment parameters are input into a trained visibility prediction model to obtain the visibility of the LED display screen.

[0008] By adopting the above technical solution, by preprocessing and standardizing the environmental parameters to ensure that the input data has a certain uniformity, the standardized target environmental data is input into the trained visibility prediction model, and the visibility of the LED display can be obtained. The visibility information of the LED display can be used to optimize the display content, adjust parameters such as brightness and contrast, so as to provide a better viewing experience and protect the visual health of the observer.

[0009] Optionally, determining the target wavelength of the LED display screen based on the visibility includes: determining the wavelength range corresponding to the visibility based on the visibility and a preset correspondence between the visibility and the wavelength range; calculating the energy consumption range of the LED display screen displaying the wavelength range based on the wavelength range; and determining the target wavelength of the LED display screen based on the wavelength range and the energy consumption range.

[0010] By adopting the above technical solution, the wavelength range required for the LED display can be accurately determined based on the correspondence between visibility and wavelength range, and the appropriate wavelength range can be selected to meet the display requirements. Combined with the wavelength range and energy consumption range, the target wavelength of the LED display is determined, which helps to ensure the balance between the display effect and energy consumption of the LED display.

[0011] Optionally, determining the display brightness range of the LED display screen according to the target wavelength and the preset maximum brightness includes: determining the brightness corresponding to the target wavelength as the minimum brightness according to the target wavelength and the relationship between wavelength and brightness; obtaining the brightness parameters of the LED display screen, and calculating the preset maximum brightness of the LED display screen according to the brightness parameters; and using the minimum brightness and the preset maximum brightness as the display brightness range of the LED display screen.

[0012] By adopting the above technical solution, the minimum brightness value corresponding to the target wavelength is determined according to the target wavelength and the relationship between wavelength and brightness, and the preset maximum brightness of the LED display is calculated. The maximum brightness is less than or equal to the brightness threshold that causes light pollution to the human eye. The minimum brightness and the preset maximum brightness are used as the display brightness range, which ensures that the minimum brightness provided by the LED display at the target wavelength can meet the demand and will not exceed the brightness threshold that causes light pollution to the human eye.

[0013] Optionally, determining the target brightness based on the display brightness range and the environmental parameters includes: obtaining the current ambient brightness in the environmental parameters; determining whether the current ambient brightness is higher than the display brightness range; if the current ambient brightness is higher than the display brightness range, using the preset maximum brightness of the display brightness range as the target brightness; if the current ambient brightness is not higher than the display brightness range, using the current ambient brightness as the target brightness.

[0014] By adopting the above technical solution, the target brightness of the LED display is determined based on the comparison between the current ambient brightness and the display brightness range. If the ambient brightness is higher than the display brightness range, the preset maximum brightness is used to ensure the visibility of the display. If the ambient brightness is within the display brightness range, the current ambient brightness is directly used to save energy and adapt to the ambient lighting conditions.

[0015] Optionally, after adjusting the LED display screen according to the target brightness and the target wavelength, it also includes: obtaining the current ambient brightness in the environmental parameters; determining a target grayscale correction curve according to the ambient brightness; obtaining display image data of the current LED display screen, and correcting the display image data according to the target grayscale correction curve to obtain target display image data; and controlling the LED display screen to display according to the target display image data.

[0016] By adopting the above technical solution, the display image data is corrected by the target grayscale correction curve, and the display brightness is reduced in a targeted manner using grayscale correction technology, thereby achieving the purpose of reducing light pollution, while ensuring image quality without causing serious distortion of color or contrast.

[0017] Optionally, the method also includes: obtaining first image data of the current LED display screen and second image data of the next switch; obtaining the last frame image data when the first image data is switched, and the first frame image data when switching to the second image data; correcting the last frame image data and the first frame image data according to a preset grayscale correction curve to obtain target display data before switching and target display data after switching, respectively; when switching the display image, controlling the LED display screen to switch according to the target display data before switching and the target display data after switching.

[0018] By adopting the above technical solution, the last frame image data and the first frame image data are corrected according to the preset grayscale correction curve, and the LED display screen is controlled to switch images according to the corrected target display data to achieve a smooth switching effect, providing a good visual experience. At the moment of switching, light pollution suppression is achieved by first compressing the brightness range and then achieving a smooth effect through transition.

[0019] In a second aspect of the present application, a control system for suppressing light pollution of an LED display screen is provided, the system comprising: A visibility estimation module, used to obtain environmental parameters of the location of the LED display screen, and estimate the visibility of the LED display screen according to the environmental parameters; A target wavelength determination module, used to determine the target wavelength of the LED display screen according to the visibility; A brightness range determination module, used to determine the display brightness range of the LED display screen according to the target wavelength and a preset maximum brightness, wherein the maximum brightness is less than or equal to a brightness threshold that causes light pollution to human eyes; The display screen adjustment module is used to determine the target brightness according to the display brightness range and the environmental parameters, and adjust the LED display screen according to the target brightness and the target wavelength.

[0020] In a third aspect of the present application, a computer storage medium is provided, wherein the computer storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executing the above method steps.

[0021] In a fourth aspect of the present application, an electronic device is provided, comprising: a processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded by the processor and executing the above-mentioned method steps.

[0022] In summary, one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. This application determines the target wavelength and brightness range of the LED display screen based on environmental parameters and visibility estimation to optimize the display effect, provide clear and visible and visual graphics, and avoid light pollution to the human eye caused by the LED display screen by presetting the maximum brightness and controlling it within an appropriate range, protecting the visual health of the observer. According to the actual environmental parameters and display brightness range, the brightness and wavelength of the LED display screen are adjusted to adapt to different environmental requirements, which can reduce light pollution while ensuring the display effect of the LED display screen; 2. Based on the correspondence between visibility and wavelength range, this application can accurately determine the wavelength range required for the LED display, and can select a suitable wavelength range to meet the display requirements. Combined with the wavelength range and energy consumption range, the target wavelength of the LED display is determined, which helps to ensure a balance between the display effect and energy consumption of the LED display; 3. This application corrects the last frame image data and the first frame image data according to a preset grayscale correction curve, and achieves a smooth switching effect by controlling the LED display screen to switch images according to the corrected target display data, providing a good visual experience. At the moment of switching, it realizes light pollution suppression by first compressing the brightness range and then achieving a smooth effect through transition. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of a control method for suppressing LED light pollution provided by an embodiment of the present application; Figure 2 This is a schematic diagram of a control system module for suppressing LED light pollution provided by an embodiment of the present application; Figure 3 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0024] Explanation of the accompanying drawings: 1. visibility estimation module; 2. target wavelength determination module; 3. brightness range determination module; 4. display screen adjustment module; 300. electronic device; 301. processor; 302. communication bus; 303. user interface; 304. network interface; 305. memory. DETAILED DESCRIPTION

[0025] In order to enable technicians in this field to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0026] In the description of the embodiments of the present application, words such as "for example" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "for example" or "for example" is intended to present related concepts in a specific way.

[0027] In the description of the embodiments of the present application, the meaning of the term "multiple" refers to two or more. For example, multiple systems refer to two or more systems, and multiple screen terminals refer to two or more screen terminals. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0028] In order to facilitate understanding of the system provided by the embodiment of the present application, before introducing the embodiment of the present application, the background of the embodiment of the present application is first introduced.

[0029] In the fiercely competitive market economy, commercial advertisements as promotional tools are increasingly valued by merchants because they greatly affect the competitiveness of the products themselves. As a new type of outdoor advertising carrier, LED advertising screens have become the new favorite of merchants because of their high brightness, long life, bright colors, clear images, large amount of information, easy updating, energy saving and environmental protection.

[0030] Although these LED advertising screens have good scrolling display effects and beautify the city night view, these bright spots are not all of the LED advertising screens. The "light pollution" and visual interference caused by them are increasingly troubling people. "In busy roads, some businesses change scrolling advertisements faster and faster, change screens to larger and larger, and adjust the brightness higher and higher in order to attract the attention of passers-by. Some even use high-brightness white lights to illuminate. The LED advertising screens are more dazzling than one another, interfering with people's visual experience and daily routines. Therefore, in order to reduce light pollution, the brightness and contrast of the LED screen may be adjusted to a lower level, but this will also affect the visibility and visual effects of the graphics on its display screen, making it difficult to have a certain balance between pursuing good display effects and reducing light pollution at the same time.

[0031] After the background introduction of the above content, those skilled in the art can understand the problems existing in the prior art. The following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0032] The embodiment of the present application proposes a display screen for suppressing LED light pollution, which includes an LED display unit, an environmental parameter acquisition module, an intelligent control unit, a wavelength adjustment module, a brightness control module, and an image processing module. The LED display unit includes an RGB LED array: composed of red, green, and blue LED lamp beads, and an adjustable blue light LED: with a blue light intensity that can be individually controlled; the environmental parameter acquisition module includes a light sensor: to detect the ambient light intensity, a blue light intensity sensor: to detect the blue light intensity in the environment, a temperature sensor: to detect the ambient temperature, and a time module: to obtain current time information. The intelligent control unit includes a central processing unit (CPU), a memory (including ROM and RAM), a visibility prediction model: a pre-trained model, considering blue light factors, and a blue light impact assessment algorithm: to assess the impact of blue light on the human eye. The wavelength adjustment module: a wavelength selector: to select the best wavelength according to visibility and blue light impact, a blue light filter: an adjustable physical filter layer, used to filter excess blue light. The brightness control module may include an overall brightness adjuster: to control the overall brightness of the display screen, and a blue light channel controller: to individually adjust the brightness of the blue light LED. The image processing module can include a color balance adjuster: dynamically adjust the RGB ratio to reduce blue light output, a grayscale correction unit: adjust the image grayscale according to the ambient brightness and blue light intensity, and an image switching optimization unit: optimize the image switching process to reduce blue light flicker. This smart display can not only effectively suppress LED light pollution, but also pay special attention to the anti-blue light function, aiming to provide users with a healthier and more comfortable visual experience.

[0033] It should be noted that the technical solution provided in the embodiments of the present application can be applied outdoors, such as LED electronic billboards, and can also be applied to indoor lighting scenarios, such as displays on corporate conference room screens, display screens in movie theaters, and indoor smart lighting and other LED devices, without limitation here.

[0034] Please refer to Figure 1 , a flow chart of a control method for suppressing LED light pollution is proposed. The method can be implemented by a computer program, a single-chip microcomputer, or run on a control system for suppressing LED light pollution. The computer program can be integrated in the controller of the LED display screen, or run as an independent tool application. Specifically, the method includes steps 10 to 40, and the above steps are as follows: Step 10: Obtain the environmental parameters of the location of the LED display screen, and estimate the visibility of the LED display screen based on the environmental parameters.

[0035] LED display is a flat display technology that uses light-emitting diodes as light sources. It is composed of a matrix of many LEDs, each LED represents a pixel, and images and videos are displayed by controlling the brightness and color of the LED.

[0036] In the embodiments of the present application, environmental parameters refer to various external environmental conditions that affect the visual effect of the LED display screen, which may include environmental brightness: refers to the brightness of the light around the display screen, meteorological conditions: such as whether there is haze, sunny or rainy, etc. Visibility refers to the visible effect index that can be achieved by the LED display screen under a given set of environmental parameter conditions. The better the visibility, the clearer the images and texts on the display screen can be viewed under the given environmental conditions. The visibility value range is usually set between 0 and 1, and the closer to 1, the better the visual effect.

[0037] Based on the above embodiment, as an optional embodiment, the step of obtaining the environmental parameters of the location of the LED display screen and estimating the visibility of the LED display screen according to the environmental parameters may further include the following steps: Step 101: Obtain environmental parameters of the LED display screen within a preset range.

[0038] Specifically, the LED display screen may be in various locations, such as a bustling and bright city with many people, or a roadside with many vehicles. It is necessary to obtain the environmental parameters of the LED display screen within a preset range, such as an area with a radius of 50 meters around the LED display screen. Special environmental detection equipment can be set up to collect environmental parameters within the preset range in all directions. The equipment can include a photosensitive sensor to detect the ambient brightness in real time, a meteorological sensor to detect meteorological conditions such as haze and rain, and a camera to capture the surrounding scene and use image recognition technology to analyze whether there are any obstructions.

[0039] Step 102: preprocess and standardize the environmental parameters to obtain target environmental parameters.

[0040] Specifically, after obtaining the original environmental parameter data, preprocessing is required, such as removing invalid abnormal data, denoising, interpolation smoothing, etc., and then standardizing different parameters according to certain rules, such as mapping the ambient brightness to a value in the range of 0-1. After preprocessing, a clean and unified target environmental parameter data set is obtained.

[0041] Step 103: Input the target environment parameters into the trained visibility prediction model to obtain the visibility of the LED display screen.

[0042] Specifically, the prediction model can be a machine learning model trained by the data science team based on a large amount of historical data, with the input being the target environment parameters and the output being a visibility index in the range of 0-1. The model can use various algorithms, such as linear regression, neural networks, etc., so that the data of the unified target environment parameters can be input into the trained visibility prediction model to output the visibility of the LED display.

[0043] For example, in the environmental parameter detection of an LED display screen, the following data was obtained: ambient brightness: 80 lumens (ideal ambient light is 100-200 lumens), weather conditions: sunny, shielding conditions: no high-rise buildings, only a small number of trees blocking, and the environmental parameter characteristics of the LED display screen can be obtained as: moderate ambient brightness, good weather conditions, and basically no shielding. This set of environmental parameter data is preprocessed and standardized, and then input into the trained visibility prediction model. The model can derive the influence of environmental parameters on visibility based on past data. For example, the ambient brightness is positively correlated with visibility. The model can calculate and output that the visibility of this LED display screen in the current environment is about 0.85 (full score 1 point). This means that under the environmental parameter conditions, the LED display screen has a good visual effect.

[0044] Step 20: Determine the target wavelength of the LED display based on visibility.

[0045] Specifically, visibility refers to the visible effect index of the LED display image under a certain set of environmental parameters. Wavelength refers to the color of the light emitted by the LED display. The LED display can produce light of different colors by adjusting the wavelength of the light-emitting diode. In a night environment, when the visibility is good, short-wavelength blue light or green light can be selected to reduce brightness and light pollution; when the visibility is poor, long-wavelength yellow light or red light needs to be selected to improve the visual effect. Therefore, by selecting light of different wavelengths according to the level of visibility, light pollution can be reduced as much as possible while taking into account the visual effect. The peak wavelengths of the three primary colors emitted by the LED display are usually divided into red light: peak wavelength of about 620-630 nanometers, green light: peak wavelength of about 515-525 nanometers, and blue light: peak wavelength of about 460-470 nanometers. Light of different wavelengths can be synthesized by adjusting the brightness ratio of the three primary colors. The wavelength here refers to adjusting the peak wavelength of the three primary colors to produce mixed light that is reddish, greenish or blueish.

[0046] Based on the above embodiment, as an optional embodiment, the step of determining the target wavelength of the LED display screen according to visibility may further include the following steps: Step 201: Determine the wavelength range corresponding to the visibility according to the visibility and the preset correspondence between the visibility and the wavelength range.

[0047] Step 202: Calculate the energy consumption range of the LED display screen displaying the wavelength range according to the wavelength range.

[0048] Specifically, a corresponding relationship table between visibility and wavelength range is established in advance. For example, the wavelength range corresponding to visibility of 0.7-0.8 is 550-560 nanometers. After obtaining the estimated visibility of the LED display, the wavelength range corresponding to the visibility is obtained by looking up the table, assuming it is 560-570 nanometers. Then the stored energy consumption data of the LED display at different wavelengths is called, that is, the energy consumption corresponding to different specific wavelength values ​​within this wavelength range. The measured data can be collected to establish this wavelength-energy consumption database. For example, within 560-570 nanometers, the minimum energy consumption at 560 nanometers is 50 watts; 60 watts at 565 nanometers; and 80 watts at 570 nanometers. By querying the wavelength-energy consumption data, the energy consumption range within the wavelength range can be obtained, that is, 50-80 watts.

[0049] Step 203: Determine the target wavelength of the LED display screen according to the wavelength range and the energy consumption range.

[0050] Specifically, in a feasible embodiment, if the user of the LED display screen is more concerned about energy saving, then within this wavelength range, a wavelength with an energy consumption value close to the lower limit of the energy consumption range can be selected as the target wavelength, for example, the above-selected wavelength of 560 nanometers with an energy consumption of 50 watts. In this way, on the basis of meeting visibility, energy consumption can be reduced at the same time, thereby determining a relatively optimized target wavelength.

[0051] In another feasible embodiment, a quantitative relationship model between wavelength, visibility and energy consumption can be established to determine the target wavelength. The brightness and energy consumption data of LEDs with different wavelengths can be collected first, and the visibility and energy consumption data of red, green and blue LEDs in the range of 440nm to 660nm can be collected at a wavelength interval of 10nm. With wavelength λ as the independent variable, visibility L and energy consumption P as the dependent variables, a linear regression model is established: L = a1λ + b1, P = a2λ + b2, and the coefficients a1, a2, b1, b2 are determined using the least squares method. For example, for a green LED with λ=500nm, the measured visibility L=350lm and energy consumption P=0.5W can be obtained by substituting them into the model: a1=0.8, b1=130, a2=-0.15, b2=1.2. According to the visibility requirement L0 and the power consumption limit P0, the equation group is solved: L0=a1λ+b1, P0=a2λ+b2, so that the optimal target wavelength λ that meets the conditions can be solved.

[0052] Step 30: Determine the display brightness range of the LED display screen according to the target wavelength and the preset maximum brightness, where the maximum brightness is less than or equal to the brightness threshold that causes light pollution to the human eye.

[0053] Specifically, the brightness parameters of the LED display are obtained, and the preset maximum brightness of the LED display is calculated according to the brightness parameters. Since the maximum brightness is different in different time periods, the ambient brightness is high during the daytime period, and the set maximum brightness can be relatively large to ensure the display effect. During the evening period, the ambient brightness is low, and a lower maximum brightness should be set to reduce light pollution to residents and drivers. However, the maximum brightness of all time periods needs to be less than or equal to the brightness threshold that causes light pollution to the human eye. The brightness threshold of the LED display causing light pollution is about 8000-20000 lumens in the daytime environment and 100-600 lumens in the night environment. According to the target wavelength and the relationship between wavelength and brightness, the brightness corresponding to the target wavelength is determined to be the minimum brightness; first, based on the determined target wavelength and the preset relationship between wavelength and brightness, the brightness value corresponding to the target wavelength is determined to be the minimum brightness value. For example, if the target wavelength is 550 nanometers, its minimum brightness is 180 lumens. The minimum brightness and the preset maximum brightness are used as the display brightness range of the LED display.

[0054] Step 40: Determine the target brightness according to the display brightness range and environmental parameters, and adjust the LED display according to the target brightness and the target wavelength.

[0055] Specifically, after determining the display brightness range of the LED display screen, the current ambient brightness in the environmental parameters of the current environment where the LED display screen is located is obtained, which can be collected by an ambient light sensor set near the display screen, for example, the current ambient brightness is detected to be 100 lumens. Determine whether the current ambient brightness is higher than the display brightness range; if the current ambient brightness is higher than the display brightness range, the preset maximum brightness of the display brightness range is used as the target brightness; if the current ambient brightness is not higher than the display brightness range, the current ambient brightness is used as the target brightness. Assume that the display brightness range is 180-300 lumens. When the current ambient brightness is not higher than the upper limit of the display brightness range, the current ambient brightness value is directly used as the target brightness; here the ambient brightness of 100 lumens is less than the upper limit of 300 lumens, so the target brightness is directly taken as 100 lumens. If the current ambient brightness is higher than the display brightness range, the highest brightness that is less than or equal to the light pollution that causes light pollution to the human eye is used as the target brightness. According to this target brightness of 100 lumens and the previously set target wavelength of 550 nanometers, the LED display panel is driven to achieve the target brightness and wavelength through PWM dimming. In this way, the target brightness can be reasonably determined according to the current specific ambient brightness, which not only ensures the display effect but also avoids light pollution caused by excessive brightness.

[0056] Based on the above embodiment, as an optional embodiment, after adjusting the LED display screen according to the target brightness and the target wavelength, the following steps may also be included: Specifically, the current ambient brightness collected by the ambient light sensor is obtained, for example, the detected ambient brightness is 50 lumens. According to the current ambient brightness and the corresponding relationship table between the preset ambient brightness and the γ grayscale correction curve, the target grayscale correction curve under the ambient light condition is determined. It is assumed that an S-shaped curve with a γ value of 1.5 is selected to perform grayscale correction to induce a reduction in screen brightness. The input image data that the LED display screen currently needs to display is obtained, which may be an advertising picture or a video screen. According to the determined S-shaped curve with γ=1.5, the display image data is corrected to obtain the target display image data, which can reduce the display brightness of the image in the dark area. Finally, the LED display panel is driven to emit light according to the corrected new image. The grayscale correction technology is used to reduce the display brightness in a targeted manner to achieve the purpose of reducing light pollution, while ensuring the image quality and not causing serious distortion of color or contrast.

[0057] It should be noted that since this solution obtains environmental parameters, estimates visibility, determines the target wavelength and brightness range, and finally adjusts the display parameters of the LED display to achieve the purpose of suppressing light pollution, this dynamic adjustment idea can deal with various light pollution problems including blue light.

[0058] As an optional embodiment, in the blue light protection scenario, the blue light wavelength range (about 380-500nm) can be taken into consideration, and longer wavelength light can be given priority when visibility is low to reduce the use of blue light. When determining the target wavelength, wavelengths with low energy consumption and not belonging to the blue light range can be given priority, which can reduce blue light pollution and achieve energy saving.

[0059] In specific implementation, in addition to conventional parameters such as brightness, the detection of blue light intensity in the environment can also be added. When training the visibility prediction model, the blue light factor can be taken into consideration, and the blue light filtering condition can be added to the wavelength selection algorithm, giving priority to non-blue light bands. When calculating the maximum brightness, the blue light component is considered to ensure that the blue light does not exceed the safety threshold. When the ambient brightness is low, the brightness of the blue light channel can be further reduced. In addition to the overall brightness and wavelength adjustment, the brightness of the blue sub-pixel can be targetedly lowered. During grayscale correction, the blue channel can be specially processed, such as reducing the contrast or brightness of the blue channel.

[0060] Based on the above embodiment, as an optional embodiment, a control method for suppressing light pollution of an LED display screen may further include the following steps: Specifically, since most LED display screens display a variety of advertising images and texts rather than a single image and text, there will be display image switching. When the LED display screen switches images, the first image data currently being displayed on the current display screen is obtained, such as an advertising picture; and the second image data to be switched for display, such as a piece of text news. The last frame of the first image data and the first frame of the second image data are extracted. The last frame of the image data and the first frame of the image data are corrected according to a preset grayscale correction curve. The preset grayscale correction curve is an S curve with a γ value less than 1, and its brightness range is compressed. After processing, the target display data before switching and the target display data after switching are obtained. When switching images, the target data before switching is first displayed frame by frame, and smoothly transitioned to a completely black screen, and then the frames of the target data after switching are displayed frame by frame from the completely black screen. At the moment of switching, light pollution suppression is achieved by first compressing the brightness range and then achieving a smooth effect through transition.

[0061] See also Figure 2 , is a schematic diagram of a control system module for suppressing LED light pollution provided by an embodiment of the present application. The control system for suppressing LED light pollution may include: a visibility estimation module 1, a target wavelength determination module 2, a brightness range determination module 3 and a display screen adjustment module 4, wherein: A visibility estimation module 1 is used to obtain environmental parameters of the location of the LED display screen, and estimate the visibility of the LED display screen according to the environmental parameters; A target wavelength determination module 2 is used to determine the target wavelength of the LED display according to the visibility; A brightness range determination module 3, used to determine the display brightness range of the LED display screen according to the target wavelength and a preset maximum brightness, wherein the maximum brightness is less than or equal to a brightness threshold that causes light pollution to human eyes; The display screen adjustment module 4 is used to determine the target brightness according to the display brightness range and the environmental parameters, and adjust the LED display screen according to the target brightness and the target wavelength.

[0062] It should be noted that: when the system provided in the above embodiment realizes its functions, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the system and method embodiments provided in the above embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0063] An embodiment of the present application also provides a computer storage medium, which can store multiple instructions. The instructions are suitable for being loaded by a processor and executing a control method for suppressing LED light pollution in the above embodiment. The specific execution process can be found in the specific description of the above embodiment, which will not be repeated here.

[0064] Please refer to Figure 3 The application also discloses an electronic device. Figure 3 The electronic device 300 may include: at least one processor 301 , at least one network interface 304 , a user interface 303 , a memory 305 , and at least one communication bus 302 .

[0065] The communication bus 302 is used to realize the connection and communication between these components.

[0066] The user interface 303 may include a display screen (Display) and a camera (Camera). Optionally, the user interface 303 may also include a standard wired interface and a wireless interface.

[0067] The network interface 304 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0068] Among them, the processor 301 may include one or more processing cores. The processor 301 uses various interfaces and lines to connect various parts in the entire server, and executes various functions of the server and processes data by running or executing instructions, programs, code sets or instruction sets stored in the memory 305, and calling data stored in the memory 305. Optionally, the processor 301 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 301 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 301, and it can be implemented separately through a chip.

[0069] Among them, the memory 305 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 305 includes a non-transitory computer-readable storage medium. The memory 305 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 305 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 305 may optionally also be at least one storage device located away from the aforementioned processor 301. Refer to Figure 3 The memory 305 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an application program for a control method for suppressing LED light pollution.

[0070] exist Figure 3 In the electronic device 300 shown, the user interface 303 is mainly used to provide an input interface for the user and obtain the data input by the user; and the processor 301 can be used to call the application program stored in the memory 305 for a control method for suppressing LED light pollution. When executed by one or more processors 301, the electronic device 300 executes one or more of the methods described in the above embodiments. It should be noted that for the aforementioned method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited to the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required for the present application.

[0071] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0072] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0073] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0074] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0075] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a memory and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: various media that can store program codes, such as USB flash drives, mobile hard drives, magnetic disks or optical disks.

[0076] The above is only an exemplary embodiment of the present disclosure and cannot be used to limit the scope of the present disclosure. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the disclosure of the specification and the truth of practice, those skilled in the art will easily think of other embodiments of the present disclosure.

[0077] This application is intended to cover any variation, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art not described in the present disclosure. The description and examples are to be regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. A control method for suppressing LED light pollution, characterized in that: The method comprises: Acquire environmental parameters of the location of the LED display screen, and estimate the visibility of the LED display screen according to the environmental parameters; Determining a target wavelength of the LED display screen according to the visibility; Determine the display brightness range of the LED display screen according to the target wavelength and the preset maximum brightness, wherein the maximum brightness is less than or equal to a brightness threshold that causes light pollution to human eyes; According to the display brightness range and the environmental parameters, a target brightness is determined, and the LED display screen is adjusted according to the target brightness and the target wavelength.

2. The control method for suppressing LED light pollution according to claim 1, characterized in that: The step of obtaining the environmental parameters of the location of the LED display screen and estimating the visibility of the LED display screen according to the environmental parameters includes: Obtain the environmental parameters of the LED display screen within the preset range; Performing data preprocessing and standardization on the environmental parameters to obtain target environmental parameters; The target environment parameters are input into a trained visibility prediction model to obtain the visibility of the LED display screen.

3. The control method for suppressing LED light pollution according to claim 1, characterized in that: Determining the target wavelength of the LED display screen according to the visibility includes: Determining the wavelength range corresponding to the visibility according to the visibility and a preset correspondence relationship between the visibility and the wavelength range; According to the wavelength range, calculating the energy consumption range of the LED display screen when displaying the wavelength range; The target wavelength of the LED display screen is determined according to the wavelength range and the energy consumption range.

4. The control method for suppressing LED light pollution according to claim 1, characterized in that: Determining the display brightness range of the LED display screen according to the target wavelength and the preset maximum brightness includes: According to the target wavelength and the relationship between wavelength and brightness, determining the brightness corresponding to the target wavelength as the minimum brightness; Acquire the brightness parameter of the LED display screen, and calculate the preset maximum brightness of the LED display screen according to the brightness parameter; The minimum brightness and the preset maximum brightness are used as the display brightness range of the LED display screen.

5. The control method for suppressing LED light pollution according to claim 1, characterized in that: The determining the target brightness according to the display brightness range and the environmental parameter includes: Obtain the current ambient brightness in the ambient parameters; Determine whether the current environment brightness is higher than the display brightness range; If the current environment brightness is higher than the display brightness range, the preset maximum brightness of the display brightness range is used as the target brightness; If the current environment brightness is not higher than the display brightness range, the current environment brightness is used as the target brightness.

6. The control method for suppressing LED light pollution according to claim 1, characterized in that: After adjusting the LED display screen according to the target brightness and the target wavelength, the method further includes: Get the current ambient brightness in the ambient parameters; Determining a target grayscale correction curve according to the ambient brightness; Acquire display image data of the current LED display screen, and correct the display image data according to the target grayscale correction curve to obtain target display image data; Control the LED display screen to display according to the target display image data.

7. The control method for suppressing LED light pollution according to claim 1, characterized in that: The method further comprises: Obtain the first image data of the current LED display screen and the second image data of the next switch; Acquire the last frame of image data when the first image data is switched, and the first frame of image data when switching to the second image data; Correcting the last frame of image data and the first frame of image data according to a preset grayscale correction curve to obtain target display data before switching and target display data after switching, respectively; When the display image is switched, the LED display screen is controlled to switch according to the target display data before switching and the target display data after switching.

8. A control system for suppressing LED light pollution, characterized in that: The system comprises: A visibility estimation module (1) is used to obtain environmental parameters of the location of the LED display screen and estimate the visibility of the LED display screen according to the environmental parameters; A target wavelength determination module (2), used for determining a target wavelength of the LED display screen according to the visibility; A brightness range determination module (3), used to determine the display brightness range of the LED display screen according to the target wavelength and a preset maximum brightness, wherein the maximum brightness is less than or equal to a brightness threshold that causes light pollution to human eyes; A display screen adjustment module (4) is used to determine a target brightness according to the display brightness range and the environmental parameters, and to adjust the LED display screen according to the target brightness and the target wavelength.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: It includes a processor, a memory, a user interface and a network interface, the memory is used to store instructions, the user interface and the network interface are used to communicate with other devices, and the processor is used to execute the instructions stored in the memory so that the electronic device executes the method as described in any one of claims 1-7.

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