An ambient light adaptive LED display screen dynamic energy-saving control system

Abstract

The application relates to the technical field of LED display screen control, in particular to an LED display screen dynamic energy-saving control system based on environmental light self-adaptation, which comprises a display sensing module, a display state analysis module, an environmental analysis module and a control adjustment module. The display sensing module is used to acquire a current display image of a target LED display screen and current display brightness of each position, and periodically acquires original environmental light parameters of each position of the target LED display screen. The display state analysis module is used to determine a plurality of key display areas based on the current display image, and to determine basic display influence characteristic values of the key display areas. The environmental analysis module is used to determine environmental display influence characteristic values of the key display areas. The control adjustment module is used to determine whether the key display areas meet expected energy-saving standards based on the basic display influence characteristic values and the environmental display influence characteristic values of the key display areas, so as to determine a control adjustment mode. The application can realize self-adaptive energy-saving control of the LED display screen and guarantee display effect.

Description

Technical Field

[0001] This invention relates to the field of LED display control technology, and in particular to a dynamic energy-saving control system for LED displays based on ambient light adaptation. Background Technology

[0002] With the rapid development of smart city construction and the outdoor media industry, LED displays, with their advantages of high brightness, fast response, long lifespan, and the ability to be spliced ​​for large-scale display, have been widely used in various scenarios such as outdoor advertising, traffic guidance, municipal squares, sports stadiums, and commercial complexes. Especially in large and medium-sized outdoor display scenarios, a single LED display often consists of arrays of thousands or even tens of thousands of LED beads. Their long-term, high-brightness operation leads to huge power consumption, as well as problems such as light pollution and equipment overheating and aging. How to achieve dynamic energy-saving control of LED displays while ensuring display quality and visual comfort has become a pressing technical challenge for the industry.

[0003] Currently, most existing LED display brightness adjustment and energy-saving control technologies employ a single ambient light sensor combined with fixed dimming levels. These systems typically deploy only a small number of photosensitive sensors around the display screen, roughly determining external brightness conditions by collecting ambient light intensity, and then uniformly adjusting the brightness of the entire screen. This approach has significant drawbacks: Firstly, the single and fixed location of ambient light collection methods prevents precise perception of ambient light across different areas of the screen. For large-area splicing screens, irregularly shaped screens, or scenarios with partial obstruction or strong localized light, brightness adjustments are prone to mismatch with the actual environment. Secondly, existing systems generally lack intelligent recognition and hierarchical processing of the displayed content itself. Regardless of whether the display area contains core text, the main image, a solid color background, or redundant edge areas, the same dimming strategy is used, failing to guarantee the clarity of critical information while causing significant energy consumption in non-critical areas.

[0004] Chinese Patent Publication No. CN120726939A discloses an energy-saving method for an LED display screen, including: collecting ambient brightness and original image data; generating brightness control parameters based on the ambient brightness using a preset model; dividing the feature pixel set and non-feature pixel set based on an image feature recognition model and performing differentiated brightness adjustment to generate an optimized image; monitoring power consumption data in real time, triggering a dynamic energy-saving mode when the power consumption exceeds a threshold, and using a pulse width modulation signal graded adjustment strategy to reduce the overall brightness; and dynamically switching between standard mode, extreme energy-saving mode, or high-brightness display mode according to the ambient brightness change rate and viewing distance.

[0005] The existing technology has the following problems: the power saving mode is only triggered when the power consumption exceeds the threshold, and the power saving control method is only to reduce the overall brightness, which makes it difficult to guarantee the display effect. Summary of the Invention

[0006] To address this issue, the present invention provides a dynamic energy-saving control system for LED displays based on ambient light adaptation, which overcomes the problem that existing energy-saving control methods only reduce overall brightness and cannot guarantee display quality.

[0007] To achieve the above objectives, the present invention provides a dynamic energy-saving control system for LED displays based on ambient light adaptation, comprising: The display sensing module is used to acquire the current display image of the target LED display screen and the current display brightness at each position, as well as periodically acquire the original ambient light parameters at each position of the target LED display screen. The display status analysis module is used to determine several key display areas based on the current display image, and to determine the basic display influence characterization value of each key display area based on the color distribution characteristics of each key display area and the current display brightness at each position. An environmental analysis module is used to determine the environmental display impact characterization value of each key display area based on the comparison results of the basic ambient light parameters and the comprehensive ambient light parameters of each key display area. The basic ambient light parameters of any key display area are determined based on the basic display impact characterization value of the key display area, and the comprehensive ambient light parameters of any key display area are determined based on the original ambient light parameters of each position of the target LED display screen within the target time period. The control and adjustment module is used to determine whether the expected energy-saving standard is met based on the basic display impact characterization value and the environmental display impact characterization value of each of the key display areas, and to determine the control and adjustment method, including: Based on the basic display impact characterization values ​​and environmental display impact characterization values ​​of each of the key display areas, several target display areas are determined in order to adjust the current display brightness of each target display area; Furthermore, a basic adjustment coefficient is determined based on the comparison between the original ambient light parameters and the preset ambient light parameters at each location of the target LED display screen within a preset time period, so as to adjust the current display brightness at each location of the target LED display screen.

[0008] Furthermore, the display status analysis module determines several image feature points based on the current display image, and determines the region division boundary based on the clustering results of each image feature point, so as to obtain several key display regions.

[0009] Furthermore, the display status analysis module determines the basic display impact characterization value of the key display area based on the color distribution characterization value and brightness distribution characterization value of any of the key display areas, wherein, The color distribution characterization value of the key display area is determined based on the color distribution characteristics of the key display area; The brightness distribution characterization value of the key display area is determined based on the current display brightness at each location within the key display area.

[0010] Furthermore, the environmental analysis module determines the basic influence coefficient of the key display area based on the basic display influence characterization value of any of the key display areas and the first preset influence characterization value, and determines the basic ambient light parameters of the key display area based on the basic influence coefficient and the preset ambient light parameters.

[0011] Furthermore, the environmental analysis module determines the environmental change characterization value of the key display area based on the changes in the original ambient light parameters at each location of any of the key display areas within the target time period, and determines the comprehensive ambient light parameters of the key display area based on the environmental change characterization value.

[0012] Furthermore, the environmental analysis module determines the parameter determination method corresponding to the key display area based on the comparison result between the environmental change characterization value of any of the key display areas and the preset change characterization value, including a first determination method and a second determination method, wherein, In the first determining method, an environmental adjustment coefficient is determined based on the environmental change characterization value of the key display area and a preset change characterization value, and a comprehensive ambient light parameter of the key display area is determined based on the environmental adjustment coefficient and a preset ambient light parameter; In the second determination method, the comprehensive ambient light parameters of the key display area are determined based on the original ambient light parameters of each location in the key display area.

[0013] Furthermore, the control adjustment module determines whether the expected energy-saving standard is met based on the comparison results of the basic display impact characterization value of each key display area with the first preset impact characterization value and the comparison results of the environmental display impact characterization value with the second preset impact characterization value.

[0014] Furthermore, the control adjustment module determines the control adjustment method as a first adjustment method based on a first determination condition, wherein, The first determination criterion meets the expected energy-saving standard; The first adjustment method involves determining several target display areas based on the basic display impact characterization values ​​and environmental display impact characterization values ​​of each key display area, in order to adjust the current display brightness of each target display area.

[0015] Furthermore, the control adjustment module determines the control adjustment method as the second adjustment method based on the second determination condition, wherein, The second criterion is that the energy-saving standard is not met; The second adjustment method is to determine the basic adjustment coefficient based on the comparison results of the original ambient light parameters and the preset ambient light parameters of each position of the target LED display screen within a preset time period, so as to adjust the current display brightness of each position of the target LED display screen.

[0016] Furthermore, the control adjustment module determines several target display areas based on the comparison results of the basic display influence characterization value and the first preset influence characterization value of each key display area, as well as the comparison results of the environmental display influence characterization value and the second preset influence characterization value. Based on the basic display influence characterization value and the environmental display influence characterization value of each target display area, the module determines the energy-saving adjustment coefficient corresponding to each target display area to adjust the current display brightness of the target display area.

[0017] Compared with existing technologies, the advantages of this invention are as follows: By setting up a display perception module, this invention can provide a multi-source, high spatiotemporal resolution perception data foundation, enabling targeted analysis based on the displayed content and real-time capture of dynamic changes in ambient light. This provides data support for subsequent adaptive energy-saving adjustments of the target LED display screen based on ambient light. By setting up a display status analysis module, the current displayed image can be divided into key display areas, automatically identifying the main content area and secondary information area of ​​the screen, achieving intelligent grading of the displayed content, and avoiding excessive dimming of key screen areas that would lead to a decline in display effect. By combining the color distribution characteristics of key display areas with the current display brightness of each location to calculate the basic display impact characterization value, the importance of each area to display effect and energy-saving requirements can be quantified, making subsequent dimming strategies more targeted. By setting up an environmental analysis module, basic ambient light parameters for corresponding key display areas are generated based on the basic display impact characterization value, realizing the linkage between ambient light analysis and the importance of displayed content. This makes the environmental impact assessment more in line with actual display needs and avoids blind dimming based solely on ambient light intensity. By analyzing the original ambient light parameters within a target time period, comprehensive ambient light parameters are obtained, reflecting the overall trend of ambient light changes. Comparing the basic ambient light parameters with the comprehensive ambient light parameters yields environmental display impact values, accurately quantifying the actual impact of ambient light on the display effects of key display areas. This provides a reliable environmental basis for brightness adjustment, making energy-saving adjustments more reasonable and improving adaptability. By setting up a control adjustment module, the energy-saving standard is determined by integrating both basic and environmental display impact values. Adjustment methods are dynamically selected based on these standards, maximizing energy savings while ensuring display quality. Targeted brightness adjustments are made to specific display areas, achieving refined energy-saving control by zone. This avoids the low energy efficiency and poor display effects caused by uniform dimming across the entire area. A basic adjustment coefficient is set based on the ambient light trend over a preset time period, allowing for global fine-tuning of the screen's overall brightness. This ensures that the overall display brightness matches the environment, achieving adaptive energy-saving control for the LED display and guaranteeing display quality.

[0018] Furthermore, the display status analysis module of this invention determines the region division boundary based on image feature points and their correlation, which can more accurately fit the actual visual structure of the displayed content, avoid the problem of splitting a single visual subject or merging irrelevant backgrounds, realize intelligent and structured analysis of the displayed content, provide a basis for subsequent dynamic energy-saving control of partitions, and improve display effect and energy efficiency.

[0019] Furthermore, the display status analysis module of this invention calculates the basic display impact characterization value by fusing color distribution characterization value and brightness distribution characterization value. This enables the basic display impact characterization value to comprehensively and objectively reflect the visual weight and information value of each key display area in the overall picture, providing a scientific, quantitative and highly recognizable core decision-making basis for subsequent dynamic control of zones, thereby improving energy efficiency.

[0020] Furthermore, the environmental analysis module of this invention determines the basic influence coefficient by combining the basic display influence characterization value of key display areas with the first preset influence characterization value. This achieves a deep linkage between the importance of the displayed content and the ambient light adjustment logic, avoiding the one-sidedness of simply adjusting the brightness uniformly based on the ambient light intensity. This makes the determination of ambient light parameters more closely aligned with the actual display value of each area, improving the targeting and rationality of subsequent brightness control. Based on the basic influence coefficient and preset ambient light parameters, the basic ambient light parameters of each key display area are further determined. This allows for the assignment of differentiated ambient light reference benchmarks to display areas of different importance, ensuring that the core display area still has appropriate display contrast when the ambient light changes. This prevents key content from becoming unrecognizable due to excessive dimming, while reserving sufficient energy-saving adjustment space for non-core areas, further improving display effect and energy efficiency.

[0021] Furthermore, the environmental analysis module of this invention determines environmental change characterization values ​​by analyzing the changes in original ambient light parameters at various locations within a target time period for each key display area. This effectively captures the continuous changing trends and fluctuation patterns of ambient light, improving the stability and reliability of ambient light judgment. Based on these environmental change characterization values, comprehensive ambient light parameters are determined, making them more closely reflect real-world lighting levels and providing accurate and stable data support for subsequent calculations of environmental display impact characterization values.

[0022] Furthermore, the control adjustment module of this invention achieves quantitative judgment of energy-saving standards by comparing the basic display impact characterization value and the environmental display impact characterization value with preset thresholds, effectively improving the reliability of energy-saving control. Employing dual judgment conditions to distinguish between two control adjustment methods, it can intelligently switch control strategies based on actual energy-saving compliance, achieving flexible adaptation between refined zone adjustment and global unified adjustment. This avoids excessive dimming affecting display effects when energy-saving standards are met, while rapidly improving energy efficiency when standards are not met. When the expected energy-saving standards are met, the first adjustment method is used, selecting target display areas and adjusting local brightness based on display importance and environmental impact. This achieves precise energy saving without compromising the overall display effect or affecting the display of key information, balancing display effect and energy-saving needs. When the expected energy-saving standards are not met, the second adjustment method is activated, determining basic adjustment coefficients through historical ambient light data and globally adjusting the brightness of each position on the screen. This quickly and efficiently reduces overall power consumption and improves energy efficiency.

[0023] Furthermore, the control and adjustment module of this invention accurately selects target display areas suitable for energy-saving adjustment through a dual comparison method: comparing the basic display impact characterization value with a first preset impact characterization value, and comparing the environmental display impact characterization value with a second preset impact characterization value. This avoids unnecessary brightness reduction in key display areas and ensures the display effect of core content. Based on the basic display impact characterization value and environmental display impact characterization value corresponding to the target display area, personalized energy-saving adjustment coefficients are determined, enabling differentiated and refined control of brightness in different areas. This achieves adaptive energy-saving control of the LED display screen, ensuring display quality. Attached Figure Description

[0024] Figure 1 This is a structural block diagram of the dynamic energy-saving control system for LED displays based on ambient light adaptation, according to an embodiment of the present invention. Figure 2 A logic diagram for determining the parameter determination method corresponding to any key display area in an embodiment of the present invention; Figure 3 This is a logic diagram for determining whether the expected energy-saving standard is met in an embodiment of the present invention. Figure 4 This is a logic diagram for determining the control adjustment method in an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0026] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0027] Please see Figure 1 The diagram shown is a structural block diagram of an LED display dynamic energy-saving control system based on ambient light adaptation according to an embodiment of the present invention. The present invention provides an LED display dynamic energy-saving control system based on ambient light adaptation, comprising: The display sensing module is used to acquire the current display image of the target LED display screen and the current display brightness at each position, as well as periodically acquire the original ambient light parameters at each position of the target LED display screen. In implementation, the specific equipment and methods for acquiring the current display image, current display brightness, and ambient light parameters are not limited, as this is existing technology. For example, the current display image and current display brightness at each position can be directly read from the current frame buffer using an LED sending / receiving card, or a camera (such as an industrial camera) facing the screen can be used to capture the display screen image to obtain the current display image and current display brightness at each position of the target LED display screen. Alternatively, a digital ambient light sensor array can be deployed between the modules of the target LED display screen to cover the entire display area of ​​the target LED display screen, thereby acquiring the original light environment parameters at each position. The ambient light parameters include ambient illuminance and ambient color temperature.

[0028] The display status analysis module is connected to the display perception module and is used to determine several key display areas based on the current display image, and to determine the basic display influence characterization value of each key display area based on the color distribution characteristics of each key display area and the current display brightness at each position. Specifically, the display status analysis module determines several image feature points based on the current display image, and determines the region division boundary based on the clustering results of each image feature point, so as to obtain several key display regions.

[0029] In implementation, the currently displayed image undergoes image preprocessing. This preprocessing includes sequentially performing grayscale conversion, noise reduction filtering, and contrast enhancement on the input image to eliminate ambient light interference, image noise, and uneven brightness of the display device itself, resulting in a preprocessed image. Feature points are then extracted from the preprocessed image based on a pre-defined feature extraction model to obtain several image feature points. In practical applications, the pre-defined feature extraction model is used to extract semantically consistent feature points from the displayed image. For example, a lightweight SuperPoint model can be used. The overall architecture includes a shared encoder, feature point headers, and a description... The subheader, a shared encoder, consists of 5 convolutional blocks, each containing: Conv2D, BatchNorm, ReLU, and optional MaxPooling. The feature point head outputs the probability (0-1) that each pixel is a feature point, resulting in a probability map. The descriptor head outputs a 256-dimensional descriptor for each feature point, resulting in a descriptor map. 3×3 non-maximum suppression (NMS) is applied to the probability map to retain local maxima. A preset probability threshold (e.g., 0.5-0.7) is set, and only points with probabilities greater than the preset probability threshold are retained as final feature points. Based on the feature point coordinates, the corresponding 256-dimensional vector is sampled from the descriptor map and used as the descriptor for that point. A dataset can be constructed by displaying historical images. For each image, a random homography transformation is applied to generate image pairs, and the pixel correspondence is recorded. Traditional feature point detectors (such as Shi-Tomasi, FAST) are used to detect feature points on the original images as "pseudo-true values". A loss function is defined, where the total loss is the sum of the detection loss and the descriptor loss. The detection loss is the cross-entropy of the predicted probabilities of the 65 channels within the window and the pseudo-labels, and the descriptor loss is the hinge loss of the corresponding point.

[0030] It is understandable that each image feature point is clustered to obtain several feature point cluster groups. Each feature point cluster group includes several image feature points. For any feature point cluster group, the boundary of the minimum bounding box region of each image feature point in the feature point cluster group is used as the region division boundary, and the minimum bounding box region is determined as a key display area.

[0031] Specifically, the display status analysis module of this invention determines the region division boundary based on image feature points and their correlation, which can more accurately fit the actual visual structure of the displayed content, avoid the problem of splitting a single visual subject or merging irrelevant backgrounds, realize intelligent and structured analysis of the displayed content, provide a basis for subsequent dynamic energy-saving control of partitions, and improve display effect and energy efficiency.

[0032] Specifically, the display status analysis module determines the basic display influence characterization value of the key display area based on the color distribution characterization value and the brightness distribution characterization value of any of the key display areas. The color distribution characterization value of the key display area is determined based on the color distribution characteristics of the key display area; the brightness distribution characterization value of the key display area is determined based on the current display brightness of each position within the key display area.

[0033] In implementation, color distribution features include saturation, contrast, hue, etc. These features are normalized and mapped to the [0,1] interval to eliminate dimensional interference. For any pixel within any key display area, the color distribution features SY1, SY2, ..., SY... j , ..., SY m Preset color distribution features SE1, SE2, ..., SE j SE m Then the color distribution index SP corresponding to this pixel is (∑ m j=1 SY j ×SE j ) / (sqrt(∑ m j=1 (SY j ) 2 )×sqrt(∑ m j=1 (SE j ) 2 )); where j=1,2,…,m; m is the dimension of color distribution features, and sqrt() is a preset square root determination function; the mean of the color distribution index corresponding to each pixel in the key display area is determined as the color distribution characterization value of the key display area. For the current display brightness YJ1, YJ2,…,YJ of each pixel in any key display area i , ..., YJ n If the preset display brightness is LE, then the brightness distribution characterization value of this key display area is LP = (∑ n i=1 (YJ i -LE) 2 ) / n; avg() is a preset average value determination function; where i=1,2,…,n; n is the number of pixels in the key display area. The product of the color distribution characterization value and the brightness distribution characterization value of the key display area is determined as the basic display influence characterization value of the key display area.

[0034] Understandably, implementers can set preset color distribution characteristics based on actual conditions or the average color distribution characteristics of currently displayed images that have passed qualification tests in historical data. For example, they can extract the color distribution characteristics corresponding to each pixel in the current displayed image under the optimal energy-saving state during the historical display period from the historical display image library, and for any pixel, calculate the average color distribution characteristics corresponding to that pixel under the optimal energy-saving state during the historical display period as the preset color distribution characteristic for that pixel. For example, the average saturation value corresponding to that pixel can be used as the corresponding preset saturation. If the current displayed image is being displayed for the first time, the average global color distribution characteristics (the average color distribution characteristics corresponding to each pixel in the image) of each image in the historical display image library under the optimal energy-saving state during the historical display period can be used to set the preset color distribution characteristics. Implementers can also set preset display brightness based on actual conditions or the average display brightness value that has passed qualification tests in historical data.

[0035] Specifically, the display status analysis module of this invention calculates the basic display impact value by fusing color distribution characterization value and brightness distribution characterization value. This enables the basic display impact value to comprehensively and objectively reflect the visual weight and information value of each key display area in the overall picture, providing a scientific, quantitative and highly recognizable core decision-making basis for subsequent dynamic control of zones, thereby improving energy efficiency.

[0036] An environmental analysis module, which is connected to the display perception module and the display status analysis module respectively, is used to determine the environmental display impact characterization value of each key display area based on the comparison results of the basic ambient light parameters and the comprehensive ambient light parameters of each key display area. The basic ambient light parameter of any key display area is determined based on the basic display impact characterization value of the key display area, and the comprehensive ambient light parameter of any key display area is determined based on the original ambient light parameters of each position of the target LED display screen within the target time period. Specifically, the environmental analysis module determines the basic influence coefficient of the key display area based on the basic display influence characterization value of any of the key display areas and the first preset influence characterization value, and determines the basic ambient light parameters of the key display area based on the basic influence coefficient and the preset ambient light parameters.

[0037] In implementation, for any key display area, the ratio of the basic display impact characterization value of the key display area to the first preset impact characterization value is determined as the basic impact coefficient of the key display area. The product of the basic impact coefficient and the preset ambient illuminance is determined as the basic ambient illuminance of the key display area, and the product of the basic impact coefficient and the preset ambient color temperature is determined as the basic ambient color temperature of the key display area. The preset ambient light parameter is the ambient light level that the display screen should achieve under ideal energy-saving conditions to match the optimal brightness. In a specific embodiment, the implementer can set the preset ambient illuminance based on the actual situation or based on the average ambient illuminance value that passed the qualification test in historical data. The implementer can also set the preset ambient color temperature based on the actual situation or based on the average ambient color temperature value that passed the qualification test in historical data. The implementer can set a target time period based on the actual situation. Preferably, the target time period is set to a range of 5 min to 10 min. Implementers can set the first preset impact characterization value based on the average of the basic display impact characterization values ​​that have passed the qualification test. In this case, a historical database is constructed by selecting display images, display brightness, ambient light parameters, display effects, energy-saving effects, etc. from the historical display scenarios of the target LED display screen. Passing the qualification test means that the display effect is qualified and the energy saving meets the standard. In actual application, implementers can set the judgment criteria for qualified display effect and energy saving meet the standard based on industry standards such as "GB21520-2023" and "SJ / T11141-2025".

[0038] Specifically, the environmental analysis module of this invention determines the basic influence coefficient by combining the basic display influence characterization value of key display areas with the first preset influence characterization value. This achieves a deep linkage between the importance of the displayed content and the ambient light adjustment logic, avoiding the one-sidedness of simply adjusting the brightness uniformly based on the ambient light intensity. This makes the determination of ambient light parameters more closely aligned with the actual display value of each area, improving the targeting and rationality of subsequent brightness control. Based on the basic influence coefficient and preset ambient light parameters, the basic ambient light parameters of each key display area are further determined. This allows for different ambient light reference benchmarks to be assigned to display areas of different importance, ensuring that the core display area still has appropriate display contrast when the ambient light changes. This prevents key content from becoming unrecognizable due to excessive dimming, while reserving sufficient energy-saving adjustment space for non-core areas, further improving display effect and energy efficiency.

[0039] Specifically, the environmental analysis module determines the environmental change characterization value of the key display area based on the changes in the original ambient light parameters of each location within the target time period, and determines the comprehensive ambient light parameters of the key display area based on the environmental change characterization value.

[0040] In implementation, for any pixel in any key display area, the original ambient illuminance HG of that pixel during the target time period is (HG1, HG2, ..., HG...). g HG h The original ambient light color temperature HF = (HF1, HF2, ..., HF4) g , ..., HF h ), g=1,2,…,h, where h is the number of data collections within the target time period, HG g HF represents the original ambient illuminance of this pixel during the g-th acquisition within the target time period. g Let g be the original ambient light color temperature of this pixel during the g-th acquisition within the target time period. Then, the standard variation coefficient of illuminance for this pixel is KP = sqrt((∑ h g=1 (HG g -(∑ h g=1 HG g ) / h) 2 The standard variation coefficient of light color temperature corresponding to this pixel is RP=sqrt((∑ h g=1 (HF g -(∑ h g=1 HF g ) / h) 2 If ) / h), then the standard change characterization value corresponding to the pixel is FP=(KP / avg(HG)+RP / avg(HF)) / 2. The average value of the standard change characterization value corresponding to each pixel is determined as the environmental change characterization value of the key display area.

[0041] It is understandable that for any key display area, the environmental display impact characterization value HB = a1 × (A0 / A1) + a2 × (B0 / B1) for that key display area, where a1 and a2 are the corresponding weighting coefficients, A0 is the basic ambient illuminance, A1 is the comprehensive ambient illuminance, B0 is the basic ambient light color temperature, and B1 is the comprehensive ambient light color temperature. Implementers can set these values ​​based on actual conditions. a1 + a2 = 1. In practical applications, this can be determined using experimental calibration, placing the target LED display screen in a dark environment where ambient light conditions can be precisely controlled. In the room, the impact of individual changes in ambient illuminance and ambient color temperature on the display effect was tested. For example, peak signal-to-noise ratio and structural similarity index can be used as evaluation indicators for display effect. The illuminance impact range is the maximum decrease in display effect caused by changes in ambient illuminance, and the color temperature impact range is the maximum decrease in display effect caused by changes in ambient light amplitude. Then, the following calculations were made based on the proportion of the impact range: a1 = illuminance impact range / (illuminance impact range + color temperature impact range), a2 = color temperature impact range / (illuminance impact range + color temperature impact range).

[0042] Please see Figure 2 As shown, this is a logical judgment diagram of the parameter determination method corresponding to any key display area in an embodiment of the present invention; specifically, the environmental analysis module determines the parameter determination method corresponding to the key display area based on the comparison result between the environmental change characterization value of any key display area and the preset change characterization value, including a first determination method and a second determination method, wherein, In the first determining method, an environmental adjustment coefficient is determined based on the environmental change characterization value of the key display area and a preset change characterization value, and a comprehensive ambient light parameter of the key display area is determined based on the environmental adjustment coefficient and a preset ambient light parameter; In the second determination method, the comprehensive ambient light parameters of the key display area are determined based on the original ambient light parameters of each location in the key display area.

[0043] In implementation, for any key display area, if the environmental change characterization value of the key display area is greater than the preset change characterization value, it indicates that the original ambient light in the area fluctuates greatly and is unstable. If the original ambient light parameters are used to calculate the comprehensive ambient light parameters, it will lead to the subsequent brightness adjustment being out of control. The comprehensive ambient light parameters can be obtained by dynamically correcting the preset ambient light parameters through the environmental adjustment coefficient, so that the subsequent adjustment of the target LED display brightness is adapted to the ambient light parameters corresponding to the key display area, avoiding the influence of unstable ambient light. The parameter determination method corresponding to the key display area is the first determination method, which determines the ratio of the preset change characterization value to the environmental change characterization value as the environmental adjustment coefficient, the product of the environmental adjustment coefficient and the preset ambient light illuminance as the comprehensive ambient light illuminance of the key display area, and the product of the environmental adjustment coefficient and the preset ambient light color temperature as the comprehensive ambient light color temperature of the key display area. If the environmental change characterization value of the key display area is less than or equal to the preset change characterization value, it indicates that the ambient light fluctuation in the area is not large and is relatively stable. Therefore, the comprehensive ambient light parameter can be calculated based on the original ambient light parameter. Thus, the parameter determination method corresponding to the key display area is the second determination method, which determines the average value of the original ambient light parameter at each location of the key display area as the comprehensive ambient light parameter of the key display area. That is, the average value of the original ambient light illuminance at each location of the key display area is determined as the comprehensive ambient light illuminance of the key display area, and the average value of the original ambient light color temperature at each location of the key display area is determined as the comprehensive ambient light color temperature of the key display area.

[0044] Understandably, implementers can determine preset change characterization values ​​based on actual conditions or the average environmental change characterization values ​​that have passed compliance inspections in historical data.

[0045] Specifically, the environmental analysis module of this invention determines environmental change characterization values ​​by analyzing the changes in original ambient light parameters at various locations within a target time period for each key display area. This effectively captures the continuous changing trends and fluctuation patterns of ambient light, improving the stability and reliability of ambient light judgment. Based on these environmental change characterization values, comprehensive ambient light parameters are determined, making them more closely reflect real-world lighting levels and providing accurate and stable data support for subsequent calculations of environmental display impact characterization values.

[0046] A control adjustment module, connected to the display sensing module, the display status analysis module, and the environment analysis module, is used to determine whether the expected energy-saving standard is met based on the basic display impact characterization value and the environmental display impact characterization value of each key display area, thereby determining the control adjustment method, including: Based on the basic display impact characterization values ​​and environmental display impact characterization values ​​of each of the key display areas, several target display areas are determined in order to adjust the current display brightness of each target display area; Furthermore, a basic adjustment coefficient is determined based on the comparison between the original ambient light parameters and the preset ambient light parameters at each location of the target LED display screen within a preset time period, so as to adjust the current display brightness at each location of the target LED display screen.

[0047] Please see Figure 3 As shown, it is a logic judgment diagram for determining whether the expected energy-saving standard is met in an embodiment of the present invention; specifically, the control adjustment module determines whether the expected energy-saving standard is met based on the comparison results of the basic display influence characterization value of each of the key display areas with the first preset influence characterization value and the comparison results of the environmental display influence characterization value with the second preset influence characterization value.

[0048] In implementation, for any critical display area, if the basic display impact characterization value of the critical display area is less than the first preset impact characterization value and the environmental display impact characterization value is greater than the second preset impact characterization value, then the critical display area is determined as a candidate display area. If the total area of ​​the candidate display areas is greater than the preset area, it will be determined to meet the expected energy-saving standard; if the total area of ​​the candidate display areas is less than or equal to the preset area, it will be determined to not meet the expected energy-saving standard. Implementers can determine the second preset impact characterization value based on the actual situation or the average environmental display impact characterization value that passed the compliance test in historical data. Implementers can set the preset area based on the actual situation, or set the preset area based on 2 / 3 to 3 / 4 of the target LED display screen's display area.

[0049] Please see Figure 4 As shown, this is a logic judgment diagram for determining the control adjustment method in an embodiment of the present invention; specifically, the control adjustment module determines the control adjustment method as a first adjustment method based on a first determination condition, wherein, The first determination criterion meets the expected energy-saving standard; The first adjustment method involves determining several target display areas based on the basic display impact characterization values ​​and environmental display impact characterization values ​​of each key display area, in order to adjust the current display brightness of each target display area.

[0050] Specifically, the control adjustment module determines several target display areas based on the comparison results of the basic display influence characterization value and the first preset influence characterization value of each key display area, as well as the comparison results of the environmental display influence characterization value and the second preset influence characterization value. Based on the basic display influence characterization value and the environmental display influence characterization value of each target display area, the module determines the energy-saving adjustment coefficient corresponding to each target display area, so as to adjust the current display brightness of the target display area.

[0051] In implementation, the candidate display area is determined as the target display area. For any target display area, the ratio of the basic display influence characterization value of the target display area to the first preset influence characterization value is determined as the first ratio, the ratio of the second preset influence characterization value to the environmental display influence characterization value is determined as the second ratio, the product of the first ratio and the second ratio is determined as the energy-saving adjustment coefficient of the target display area, and the product of the average current display brightness of each position in the target display area and the energy-saving adjustment coefficient is determined as the adjusted display brightness of the target display area.

[0052] Specifically, the control adjustment module determines the control adjustment method as the second adjustment method based on the second determination condition, wherein, The second criterion is that the energy-saving standard is not met; The second adjustment method is to determine the basic adjustment coefficient based on the comparison results of the original ambient light parameters and the preset ambient light parameters of each position of the target LED display screen within a preset time period, so as to adjust the current display brightness of each position of the target LED display screen.

[0053] In implementation, the basic adjustment coefficient WB = a1 × (T0 / T1) + a2 × (R0 / R1), where T0 is the standard ambient illuminance, T1 is the preset ambient illuminance, R0 is the standard ambient light color temperature, and R1 is the preset ambient light color temperature. The average original ambient illuminance of each location on the target LED display screen within a preset time period is determined as the standard ambient illuminance, and the average original ambient light color temperature of each location on the target LED display screen within the preset time period is determined as the standard ambient light color temperature. Preferably, the preset time period is set to 1 / 2 to 1 / 3 of the target time period.

[0054] Specifically, the control and adjustment module of this invention quantifies energy-saving standards by comparing basic display impact values ​​and environmental display impact values ​​with preset thresholds, effectively improving the reliability of energy-saving control. Employing dual judgment conditions to distinguish between two control and adjustment methods, it can intelligently switch control strategies based on actual energy-saving compliance, achieving flexible adaptation between refined zone adjustment and global unified adjustment. This avoids excessive dimming affecting display effects when energy-saving standards are met, while rapidly improving energy efficiency when standards are not met. When the expected energy-saving standards are met, the first adjustment method is used, selecting target display areas based on display importance and environmental impact and adjusting local brightness. This achieves precise energy saving without compromising overall display effects or affecting the display of key information, balancing display effects and energy-saving needs. When the expected energy-saving standards are not met, the second adjustment method is activated, determining basic adjustment coefficients using historical ambient light data and globally adjusting the brightness of each position on the screen. This quickly and efficiently reduces overall power consumption and improves energy efficiency.

[0055] This invention, through the inclusion of a display perception module, provides a foundation of multi-source, high spatiotemporal resolution perception data. This allows for targeted analysis based on the displayed content, real-time capture of dynamic changes in ambient light, and data support for subsequent adaptive energy-saving adjustments of the target LED display based on ambient light. By establishing a display status analysis module, the current displayed image is divided into key display areas, automatically identifying the main content area and secondary information areas. This enables intelligent content grading, preventing excessive dimming of key areas that could degrade display quality. Combining the color distribution characteristics of key display areas with the current display brightness at each location, a basic display impact characterization value is calculated, quantifying the importance of each area to display quality and energy-saving requirements, making subsequent dimming strategies more targeted. Finally, an environmental analysis module generates basic ambient light parameters for corresponding key display areas based on the basic display impact characterization value, linking ambient light analysis with the importance of displayed content. This ensures that environmental impact assessments better align with actual display needs, avoiding blind dimming based solely on ambient light intensity. By analyzing the original ambient light parameters within a target time period, comprehensive ambient light parameters are obtained, reflecting the overall trend of ambient light changes. Comparing the basic ambient light parameters with the comprehensive ambient light parameters yields environmental display impact values, accurately quantifying the actual impact of ambient light on the display effects of key display areas. This provides a reliable environmental basis for brightness adjustment, making energy-saving adjustments more reasonable and improving adaptability. By setting up a control adjustment module, the energy-saving standard is determined by integrating both basic and environmental display impact values. Adjustment methods are dynamically selected based on these standards, maximizing energy savings while ensuring display quality. Targeted brightness adjustments are made to specific display areas, achieving refined energy-saving control by zone. This avoids the low energy efficiency and poor display effects caused by uniform dimming across the entire area. A basic adjustment coefficient is set based on the ambient light trend over a preset time period, allowing for global fine-tuning of the screen's overall brightness. This ensures that the overall display brightness matches the environment, achieving adaptive energy-saving control for the LED display and guaranteeing display quality.

[0056] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A dynamic energy-saving control system for LED displays based on ambient light adaptation, characterized in that, include: The display sensing module is used to acquire the current display image of the target LED display screen and the current display brightness at each position, and periodically acquire the original ambient light parameters at each position of the target LED display screen, wherein the ambient light parameters include ambient light illuminance and ambient light color temperature. The display status analysis module is used to determine several key display areas based on the current display image, and to determine the basic display influence characterization value of each key display area based on the color distribution characteristics of each key display area and the current display brightness at each position. Specifically, several image feature points are determined based on the currently displayed image, and the region division boundary is determined based on the clustering results of each image feature point to obtain several key display regions. The basic display influence characterization value of the key display area is determined based on the color distribution characterization value and the brightness distribution characterization value of any of the key display areas. The color distribution characterization value of the key display area is determined based on the color distribution characteristics of the key display area. The brightness distribution characterization value of the key display area is determined based on the current display brightness of each position within the key display area. The color distribution characteristics include saturation, contrast, and hue. An environmental analysis module is used to determine the environmental display impact characterization value of each key display area based on the comparison results of the basic ambient light parameters and the comprehensive ambient light parameters of each key display area. The basic ambient light parameters of any key display area are determined based on the basic display impact characterization value of the key display area, and the comprehensive ambient light parameters of any key display area are determined based on the original ambient light parameters of each position of the target LED display screen within the target time period. Specifically, the basic influence coefficient of the key display area is determined based on the basic display influence characterization value of any of the key display areas and the first preset influence characterization value, and the basic ambient light parameters of the key display area are determined based on the basic influence coefficient and the preset ambient light parameters. The environmental change characterization value of the key display area is determined based on the changes in the original ambient light parameters at each location of any of the key display areas within the target time period, and the comprehensive ambient light parameters of the key display area are determined based on the environmental change characterization value. The control and adjustment module is used to determine whether the expected energy-saving standard is met based on the basic display impact characterization value and the environmental display impact characterization value of each of the key display areas, and to determine the control and adjustment method, including: Based on the basic display impact characterization values ​​and environmental display impact characterization values ​​of each of the key display areas, several target display areas are determined in order to adjust the current display brightness of each target display area; Furthermore, a basic adjustment coefficient is determined based on the comparison between the original ambient light parameters and the preset ambient light parameters at each location of the target LED display screen within a preset time period, so as to adjust the current display brightness at each location of the target LED display screen.

2. The dynamic energy-saving control system for LED displays based on ambient light adaptation according to claim 1, characterized in that, The environmental analysis module determines the parameter determination method corresponding to the key display area based on the comparison result between the environmental change characterization value of any of the key display areas and the preset change characterization value, including a first determination method and a second determination method, wherein... In the first determining method, an environmental adjustment coefficient is determined based on the environmental change characterization value of the key display area and a preset change characterization value, and a comprehensive ambient light parameter of the key display area is determined based on the environmental adjustment coefficient and a preset ambient light parameter; In the second determination method, the comprehensive ambient light parameters of the key display area are determined based on the original ambient light parameters of each location in the key display area.

3. The dynamic energy-saving control system for LED displays based on ambient light adaptation according to claim 2, characterized in that, The control adjustment module determines whether the expected energy-saving standard is met based on the comparison results of the basic display impact characterization value of each key display area with the first preset impact characterization value and the comparison results of the environmental display impact characterization value with the second preset impact characterization value.

4. The dynamic energy-saving control system for LED displays based on ambient light adaptation according to claim 3, characterized in that, The control adjustment module determines the control adjustment method as the first adjustment method based on a first determination condition, wherein, The first criterion is that it meets the expected energy-saving standard; The first adjustment method involves determining several target display areas based on the basic display impact characterization values ​​and environmental display impact characterization values ​​of each key display area, in order to adjust the current display brightness of each target display area.

5. The dynamic energy-saving control system for LED displays based on ambient light adaptation according to claim 4, characterized in that, The control adjustment module determines the control adjustment method as the second adjustment method based on the second determination condition, wherein, The second criterion is that the energy-saving standard is not met; The second adjustment method is to determine the basic adjustment coefficient based on the comparison results of the original ambient light parameters and the preset ambient light parameters of each position of the target LED display screen within a preset time period, so as to adjust the current display brightness of each position of the target LED display screen.

6. The dynamic energy-saving control system for LED displays based on ambient light adaptation according to claim 5, characterized in that, The control adjustment module determines several target display areas based on the comparison results of the basic display influence characterization value and the first preset influence characterization value of each key display area, as well as the comparison results of the environmental display influence characterization value and the second preset influence characterization value. Based on the basic display influence characterization value and the environmental display influence characterization value of each target display area, the module determines the energy-saving adjustment coefficient corresponding to each target display area to adjust the current display brightness of the target display area.

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