Method and device for regulating and controlling brightness of LED display screen

Abstract

The invention relates to the technical field of LED display screens, in particular to an LED display screen brightness regulation and control method and device, and the method comprises the steps: obtaining light intensity data which comprises environment light intensity data collected by a distributed sensing assembly and brightness intensity data of display screen partitions; processing the light intensity data of the light intensity data to obtain a brightness uniformity index, and outputting a dynamic adjustment instruction in combination with ambient light intensity data; the dynamic adjustment instruction is converted into a partition driving parameter; and adjusting the brightness level of the partition of the display screen according to the partition driving parameter. Partitioned data acquisition and independent drive design are combined with a brightness uniformity evaluation algorithm and a dynamic adjustment strategy to realize accurate regulation and control of brightness in a complex scene. Meanwhile, a closed-loop feedback correction mechanism is introduced, so that the system stability and response speed are improved. The display effect can be remarkably improved, the user experience is enhanced, and the method is suitable for multi-scene application requirements.

Description

Technical Field

[0001] This invention belongs to the field of display technology, specifically a method and device for adjusting the brightness of an LED display screen. Background Technology

[0002] With the rapid development of LED display technology, the importance of display brightness control methods in adapting to various scenarios is becoming increasingly prominent. Although existing LED display brightness control technologies can meet basic needs to a certain extent, their adaptability and control precision in complex scenarios are still insufficient, resulting in suboptimal display effects and user experience.

[0003] The inventors have discovered that existing LED display brightness control technologies still have room for improvement in terms of multi-scenario adaptability, dynamic response speed, and control accuracy in complex environments. Therefore, this invention provides an "LED display brightness control method, device, and system," aiming to optimize brightness distribution, improve display effects, and meet the needs of multi-scenario applications through intelligent scene recognition and dynamic control strategies, thereby enhancing user experience and the overall performance of the display system. Summary of the Invention

[0004] This invention relates to a method and apparatus for controlling the brightness of an LED display screen, aiming to address the problems of insufficient adaptability, limited control precision, and inadequate dynamic response speed in existing technologies under complex scenarios. By real-time monitoring and intelligent analysis of ambient light and the brightness distribution of the display area, combined with the design concept of independent zone driving, a novel dynamic control strategy is proposed to optimize display effects and improve user experience.

[0005] The core of this invention lies in achieving precise control of LED display brightness through the synergistic effect of multiple modules. Specifically, the technical solution of this invention includes the following key components: First, this invention designs a distributed sensing component for data acquisition. This component consists of several photosensitive units and a brightness detection unit, respectively arranged in different areas of the display screen. The photosensitive units are responsible for sensing changes in the intensity of ambient light and transmitting the acquired data to the central processing module; the brightness detection units focus on acquiring the actual luminous intensity information of each area of ​​the display screen. This zoned data acquisition method not only improves the accuracy of the data but also effectively captures the brightness differences between different areas, providing a reliable basis for subsequent control.

[0006] Secondly, this invention introduces an algorithm model based on brightness uniformity evaluation. This model receives brightness distribution data from distributed sensing components and quantifies the consistency of display effects by calculating the brightness uniformity index for each region. The calculation method for the brightness uniformity index comprehensively considers the brightness values ​​and spatial distribution characteristics of each point within the region, using a weighted average to obtain the final result. Simultaneously, the model also generates dynamic adjustment instructions based on ambient light intensity distribution data. For example, in situations with high ambient light intensity, the output power of high-brightness areas is prioritized to avoid visual fatigue caused by excessively low contrast; while in situations with low ambient light, the output of low-brightness areas is appropriately reduced to enhance the sense of depth in the image.

[0007] Furthermore, this invention proposes a mapping mechanism that converts dynamic adjustment commands into specific driving parameters. This process is accomplished through a signal conversion module located between the central processing module and the partition driving unit. The signal conversion module calculates the specific driving current for each partition based on the target brightness value in the dynamic adjustment command and transmits these parameters to the corresponding partition driving unit. Upon receiving the driving parameters, the partition driving unit adjusts the output characteristics of its internal circuitry to change the brightness level of the corresponding area. Since each partition is equipped with an independent driving unit, individual control of the brightness in different areas can be achieved, significantly improving the flexibility and accuracy of the control.

[0008] Furthermore, this invention also incorporates a feedback correction mechanism for real-time monitoring of the control effect and necessary corrections. Specifically, after completing brightness adjustment, the zone drive unit feeds back its actual output brightness value to the central processing module. The central processing module compares the feedback value with the target value; if a deviation exists, it regenerates the adjustment command and sends it to the zone drive unit via the signal conversion module. This process is repeated until the actual output value and the target value become consistent. This closed-loop control design significantly improves the system's stability and reliability, making it particularly suitable for scenarios with rapidly changing ambient light or frequent switching of usage modes.

[0009] From a hardware structure perspective, the device of this invention mainly comprises the following parts: a distributed sensing component, a central processing module, a signal conversion module, and a partition driving unit. The distributed sensing component is connected to the central processing module via a flexible circuit board to ensure efficient and stable data transmission. The signal conversion module interfaces with the central processing module through a high-speed communication interface to meet real-time processing requirements. The partition driving unit is connected to each partition of the display screen via dedicated cables, thereby enabling independent control of brightness. The connections between these components are carefully designed to ensure accurate signal transmission while facilitating future maintenance and upgrades.

[0010] The technical effects of this invention are mainly reflected in the following aspects: In this embodiment, the spatial resolution of brightness control is significantly improved through partitioned data acquisition and independent drive design, resulting in a more delicate and natural display effect. Furthermore, the algorithm model based on brightness uniformity evaluation and the dynamic adjustment instruction generation strategy can flexibly respond to changes in ambient light in complex scenarios, thereby improving the user's visual experience. The introduction of a closed-loop feedback correction mechanism further enhances the robustness of the system, enabling it to maintain stable performance under high dynamic range or rapidly changing lighting conditions.

[0011] In summary, this invention addresses the shortcomings of existing technologies, such as insufficient adaptability to various scenarios, inadequate dynamic response speed, and limited control precision in complex environments, through a series of innovative technical means. Its unique zone-based independent drive design, intelligent brightness uniformity evaluation algorithm, and efficient closed-loop feedback correction mechanism together constitute a complete solution, providing strong technical support for brightness control of LED displays in multiple application scenarios.

[0012] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0013] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 A flowchart of an LED display screen brightness control method provided in the first embodiment of the present invention; Figure 2 A flowchart of an LED display screen brightness control method provided in the first embodiment of the present invention; Figure 3 A flowchart illustrating the feedback correction mechanism provided in this embodiment of the invention; Figure 4 This is a structural diagram of an LED display screen brightness control device provided in an embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any implementation described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other implementations. The following description is provided to enable any person skilled in the art to implement and use this application. Details are listed in the following description for illustrative purposes. It should be understood that those skilled in the art will recognize that this application can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application. Before describing the embodiments of the invention in detail, the design concept of the invention is outlined below.

[0017] This invention provides a method for adjusting the brightness of an LED display screen, the specific implementation of which is as follows. Figure 1 As shown, the core process of this invention includes: acquiring light intensity data, which includes ambient light intensity data collected by a distributed sensing component and brightness intensity data of the display screen partitions; processing the luminous intensity data of the light intensity data to obtain a brightness uniformity index, and outputting a dynamic adjustment command in conjunction with the ambient light intensity data; converting the dynamic adjustment command into partition driving parameters; and adjusting the brightness level of the display screen partitions according to the partition driving parameters. By real-time monitoring and intelligent analysis of the ambient light and display area brightness distribution, combined with the design concept of independent partition driving, a novel dynamic control strategy is proposed to optimize display effects and improve user experience.

[0018] The following will describe in detail each module in the above process and its implementation method with reference to the accompanying drawings.

[0019] The first aspect discloses an LED display screen brightness control system, in which the coordinated operation of a distributed sensing component 100, a central processing module 200, a signal conversion module 300, and a zone driving unit 400 achieves precise brightness control of different zones of the LED display screen. The following is in conjunction with the appendix... Figure 4 The decision-making system will be described in detail.

[0020] In a specific embodiment, a distributed sensing component 100 is arranged on the surface area of ​​the LED display screen, including a photosensitive unit and a brightness detection unit. The photosensitive unit is used to sense changes in the intensity of ambient light, while the brightness detection unit is responsible for acquiring the actual luminous intensity information of each zone of the display screen. The photosensitive unit and the brightness detection unit are distributed at certain intervals in different areas of the display screen, and this zoned arrangement ensures the comprehensiveness and accuracy of data acquisition. The photosensitive unit is connected to the central processing module 200 via a flexible circuit board, enabling it to transmit the collected ambient light intensity data to the central processing module 200 in real time. The brightness detection unit is also connected to the central processing module 200 via a flexible circuit board, feeding back the actual brightness values ​​of each zone of the display screen to the central processing module 200. This design not only improves the efficiency of data transmission but also ensures the stability and reliability of the data.

[0021] The central processing module 200 is the core control unit of the entire system, and its main function is to process and analyze data from the distributed sensing components 100. After receiving data transmitted from the photosensitive unit and the brightness detection unit, the central processing module 200 first inputs it into the brightness uniformity evaluation algorithm model for calculation. The working principle of this algorithm model is to calculate the brightness uniformity index by weighted averaging of the brightness distribution data of each zone. In the calculation of the brightness uniformity index, the brightness values ​​of each point in the area and their spatial distribution characteristics are comprehensively considered, thereby quantifying the consistency of the display effect. At the same time, the model also generates dynamic adjustment instructions based on the ambient light intensity distribution data. For example, in the case of strong ambient light, the model will prioritize increasing the output power of high-brightness areas to avoid excessively low contrast; while in the case of weak ambient light, it will appropriately reduce the output of low-brightness areas to enhance the sense of layering in the picture. These dynamic adjustment instructions are then transmitted to the signal conversion module 300.

[0022] The signal conversion module 300 is located between the central processing module 200 and the zone drive unit 400. Its main function is to convert dynamic adjustment commands into specific drive parameters. Based on the target brightness value in the dynamic adjustment command, the signal conversion module 300 calculates the specific drive current for each zone and transmits these parameters to the corresponding zone drive unit 400. The signal conversion module 300 interfaces with the central processing module 200 via a high-speed communication interface to meet real-time processing requirements. After receiving the drive parameters, the zone drive unit 400 adjusts the output characteristics of its internal circuitry to change the brightness level of the corresponding area. The zone drive unit 400 is connected to each zone of the display screen via dedicated cables, thereby achieving independent brightness control. Since each zone is equipped with an independent drive unit, individual adjustment of the brightness in different areas can be achieved, significantly improving the flexibility and accuracy of control.

[0023] To further improve the stability and reliability of the system, this invention also incorporates a feedback correction mechanism. After completing brightness adjustment, the partition drive unit 400 feeds back its actual output brightness value to the central processing module 200. The central processing module 200 compares the feedback value with the target value. If a deviation exists, it regenerates the adjustment command and sends it back to the partition drive unit 400 via the signal conversion module 300. This process is repeated until the actual output value and the target value become consistent. This closed-loop control design enables the system to maintain stable performance in scenarios with rapidly changing ambient light or frequent switching of usage modes.

[0024] In terms of hardware structure, the distributed sensing component 100 is connected to the central processing module 200 via a flexible circuit board to ensure efficient and stable data transmission. The signal conversion module 300 interfaces with the central processing module 200 through a high-speed communication interface to meet real-time processing requirements. The zone drive unit 400 is connected to each zone of the display screen via dedicated cables, thereby enabling independent control of brightness. The connections between the above components are carefully designed to ensure the accuracy of signal transmission while facilitating future maintenance and upgrades.

[0025] For the second aspect, which is based on the same inventive concept, please refer to the appendix. Figure 1 The diagram also discloses a method for adjusting the brightness of an LED display screen, comprising the following steps: Step S001: Acquire light intensity data, which includes ambient light intensity data collected by the distributed sensing component 100 and brightness intensity data of the display screen partitions.

[0026] In a further embodiment, the distributed sensing component 100 includes a photosensitive unit and a brightness detection unit. The photosensitive unit is used to sense changes in the intensity of external ambient light, and the brightness detection unit is used to obtain the actual luminous intensity information of the display screen partition.

[0027] In this embodiment, obtaining the ambient light intensity data includes the illuminance of each partition of the LED display screen, resulting in the ambient light distribution matrix E=[e ij ];

[0028] Where i,j are the partition coordinates, e ij This represents the ambient light intensity for this zone.

[0029] The ambient light distribution matrix is ​​then normalized using a normalization formula to obtain standardized ambient light intensity data.

[0030] Wherein, the normalization formula is:

[0031] in, This represents the current minimum / maximum ambient light level.

[0032] Step S002: The luminous intensity data of the light intensity data is processed to obtain the brightness uniformity index, and a dynamic adjustment command is output in combination with the ambient light intensity data.

[0033] In a further embodiment, the brightness uniformity index obtained by processing the luminous intensity data is: based on the brightness intensity data of the distributed sensing component 100, the brightness uniformity index of each region is calculated to quantify the consistency of the display effect; The formula for calculating the brightness uniformity index is as follows:

[0034] U std U is the standard deviation of the luminance uniformity index; grad Gradient brightness uniformity index; U corr The correlation brightness uniformity index; α, β, and γ are weighting coefficients, representing U, respectively. std U grad U corr The importance of the overall brightness uniformity assessment, where the weighting coefficients α+β+γ=1, and α=0.5, β=0.3, γ=0.2.

[0035] In a further embodiment, the step of generating dynamic adjustment instructions based on ambient light intensity distribution data is: The brightness uniformity index is combined with ambient light intensity distribution data to formulate an adjustment strategy, and a dynamic adjustment command is generated based on the adjustment strategy.

[0036] Understandably, the adjustment strategy includes: when the ambient light is strong, prioritizing the increase of output power in high-brightness areas to avoid excessively low contrast; when the ambient light is weak, appropriately reducing the output in low-brightness areas to enhance the sense of depth in the image.

[0037] In this embodiment, the steps of formulating an adjustment strategy based on ambient light intensity distribution data, including the brightness uniformity index, include: First, based on the brightness intensity data of the display screen zones and the ambient light intensity data, the brightness data of the target zone is obtained. The formula for the brightness of the target zone is as follows: base 1 2 total

[0038] Represented for each partition Brightness; This represents the base brightness (e.g., 500 cd / m²). Represents the ambient light response coefficient; Represents the uniformity compensation coefficient (default) ); This represents the uniformity deviation (the larger the value, the worse the uniformity).

[0039] Next, an adjustment strategy is formulated based on the brightness of the target partition and the ambient light intensity, and a dynamic adjustment command is generated based on the adjustment strategy.

[0040] Before proceeding, we first categorize ambient light intensity into three scenarios: strong light (>1000 lux), weak light (<200 lux), and medium light (200-1000 lux). Furthermore, for each environment, we assign a coefficient k1 to adjust the brightness. k1 is 0.8 for strong light, 0.3 for weak light, and 0.5 for medium light.

[0041] Next, based on the uniformity of brightness U total To formulate adjustment instructions, the details are as follows: When, U total If the value is less than 0.7 (indicating poor uniformity), different actions will be taken: In bright light environments, the priority action is to "increase the power of high-brightness areas"; in low light environments, the priority action is to "reduce the power of low-brightness areas".

[0042] When, U total If the value is greater than or equal to 0.7 (indicating good uniformity), then another action is taken: In bright light environments, the priority action is to "globally increase brightness"; in low light environments, the priority action is to "globally decrease brightness".

[0043] For medium light environments, regardless of U total Regardless of the value, the priority action is always "maintain current brightness and optimize uniformity".

[0044] In this embodiment, the above method can effectively adapt to different ambient light conditions and brightness requirements, thereby improving lighting effects and energy utilization efficiency.

[0045] For example: In one embodiment, the outdoor LED advertising screen is divided into a 3x3 array (unit: cd / m²), as shown below:

[0046] The ambient light distribution matrix is ​​obtained using a normalization formula: , ;

[0047] The brightness uniformity index is obtained by processing the luminous intensity data. =0.5×0.75+0.3×0.68+0.2×0.82=0.747 Standard deviation luminance uniformity index: , in, The standard deviation of brightness; The value represents the average brightness; the smaller the standard deviation, the higher the uniformity.

[0048] Gradient brightness uniformity index: ; Correlation brightness uniformity index: (Correlation index).

[0049] Calculate the brightness of the (1,1) partition:

[0050] A dynamic adjustment command is generated based on the adjustment strategy: Partition (1,1) is in a strong light environment, and If the value is greater than 0.7, the "global brightness boost" adjustment strategy will be executed, and the required brightness boost for partition (1,1) is... This can be achieved by increasing the drive current by 18%. Other zones are then calculated and their brightness increases are obtained sequentially using the same algorithm, thereby achieving an overall brightness increase while reducing the brightness differences between zones.

[0051] Step S003: The dynamic adjustment command is converted into partition drive parameters.

[0052] In a further embodiment, converting the dynamic adjustment command into partition drive parameters is: Based on the target brightness value in the dynamic adjustment instruction, the corresponding driving parameters for each partition are obtained, wherein the driving parameters are the driving current magnitude.

[0053] It should be noted that the brightness (luminous flux) is directly proportional to the forward current passing through it. Therefore, the brightness of the corresponding zone can be changed simply by changing the driving circuit.

[0054] Step S004: Adjust the brightness level of the display screen partition according to the partition driving parameters.

[0055] Understandably, the embodiment calculates the increased brightness for each partition according to the established adjustment strategy and steps S001-S003 above, and adjusts it sequentially according to the increased brightness, thereby achieving an overall brightness increase while reducing the brightness difference between partitions.

[0056] Please refer to the attached document. Figure 2 Furthermore, in the embodiment, based on the above steps S001-S004, step S005 is also included: the method further includes a feedback correction mechanism, that is, after adjusting the brightness level of the display screen partition according to the partition driving parameters, it is also necessary to compare the adjusted feedback value and then readjust according to the comparison result.

[0057] Please refer to the attached document. Figure 3 Specifically, it includes the following steps: Step S010: After adjusting the brightness level of the display screen partition according to the partition driving parameters, obtain the feedback value of the actual brightness value of the area. Step S011: Compare the feedback value with the target brightness value; Step S012: If there is a deviation, the adjustment command is regenerated and sent to the partition drive unit 400 through the signal conversion module 300.

[0058] In a further embodiment, the signal conversion module 300 is connected to the central processing module 200 via a high-speed communication interface, and the partition driving unit 400 is connected to the display screen partition via a dedicated cable.

[0059] In practical applications, the technical solution of this invention can be applied to brightness control of LED displays in various complex environments. For example, in outdoor advertising screens, ambient light intensity may fluctuate significantly due to weather changes or the passage of time. In this case, the photosensitive unit can sense changes in ambient light in real time and transmit the data to the central processing module 200. The central processing module 200 generates dynamic adjustment instructions through a brightness uniformity evaluation algorithm model, which are then converted into specific driving parameters by the signal conversion module 300. The zone driving unit 400 adjusts the brightness level of each zone according to the driving parameters, thereby ensuring that the display provides a clear and comfortable visual effect under different lighting conditions. Furthermore, the introduction of a feedback correction mechanism enables the system to respond quickly to rapid changes in ambient light, thus avoiding visual discomfort caused by lag in brightness adjustment.

[0060] In indoor conference screen applications, ambient light intensity is relatively stable, but users may need to adjust the brightness distribution of the display screen according to different usage scenarios. For example, when playing videos, users may want brighter areas to stand out more to enhance the sense of depth in the image; while when displaying documents, they may need a more uniform overall brightness to reduce eye strain. In this case, the brightness detection unit can acquire the actual brightness values ​​of each zone of the display screen in real time and transmit them to the central processing module 200. The central processing module 200 generates dynamic adjustment instructions through a brightness uniformity evaluation algorithm model, which are then converted into specific driving parameters by the signal conversion module 300. The zone driving unit 400 independently adjusts the brightness of each zone according to the driving parameters, thereby meeting the needs of different usage scenarios. The closed-loop control process of the feedback correction mechanism ensures the consistency between the actual brightness value and the target value, thereby improving system reliability and user experience.

[0061] In summary, this invention solves the problems of insufficient multi-scenario adaptability, lack of dynamic response speed, and limited control accuracy in complex environments in existing technologies through a series of innovative technical means. Its unique partitioned independent drive design, intelligent brightness uniformity evaluation algorithm, and efficient closed-loop feedback correction mechanism together constitute a complete solution, providing strong technical support for brightness control of LED displays in multi-scenario applications.

[0062] To enable those skilled in the art to fully understand and implement this invention, the following detailed explanation of the implementation principles of this invention is provided in conjunction with specific application scenarios.

[0063] In outdoor advertising screen applications, the photosensitive unit in the distributed sensing component 100 first senses changes in ambient light intensity in real time. The photosensitive unit transmits the collected ambient light data to the central processing module 200 via a flexible circuit board. Simultaneously, the brightness detection unit acquires the actual luminous intensity information of each zone of the display screen and feeds it back to the central processing module. After receiving the data, the central processing module calculates a weighted average of the brightness distribution of each zone based on a brightness uniformity evaluation algorithm model, resulting in a brightness uniformity index. This index comprehensively considers the brightness values ​​and spatial distribution characteristics of each point within the area, thereby quantifying the consistency of the current display effect. Simultaneously, the central processing module generates dynamic adjustment instructions based on the ambient light intensity distribution data. For example, under strong midday sunlight, the model prioritizes increasing the output power of high-brightness areas to avoid loss of image detail due to low contrast; while at night or in cloudy conditions, it appropriately reduces the output of low-brightness areas to enhance the image's sense of depth. The signal conversion module 300 calculates the specific drive current for each zone based on the target brightness value in the dynamic adjustment instructions and transmits these parameters to the corresponding zone drive unit 400. The zone drive unit 400 is connected to each zone of the display screen via a dedicated cable, adjusting the output characteristics of its internal circuitry to change the brightness level of the corresponding area. This independent drive design allows the brightness of different zones to be adjusted individually, significantly improving the flexibility and precision of control.

[0064] After completing the brightness adjustment, the partition drive unit 400 feeds back the actual output brightness value to the central processing module. The central processing module compares the feedback value with the target value. If there is a discrepancy, it regenerates the adjustment command and sends it back to the partition drive unit 400 through the signal conversion module 300. This process is repeated until the actual output value and the target value are consistent. This closed-loop control mechanism ensures that the system can respond quickly to rapid changes in ambient light, thereby avoiding visual discomfort caused by lag in brightness adjustment. For example, when a sudden change in weather causes a sharp drop in ambient light intensity, the system can quickly adjust the brightness distribution of the display screen to ensure that the picture remains clear and comfortable to view.

[0065] In indoor conference screen applications, ambient light intensity is relatively stable, but users may need to adjust the brightness distribution of the display screen according to different usage scenarios. For example, when playing videos, users want brighter areas to stand out more to enhance the image's depth; while when displaying documents, they need more uniform overall brightness to reduce eye strain. In this case, the brightness detection unit acquires the actual brightness values ​​of each zone of the display screen in real time and transmits them to the central processing module. The central processing module generates dynamic adjustment instructions through a brightness uniformity evaluation algorithm model, which are then converted into specific driving parameters by the signal conversion module 300. The zone driving unit 400 independently adjusts the brightness of each zone according to the driving parameters to meet the needs of different usage scenarios. For example, when playing videos, the zone driving unit 400 prioritizes increasing the brightness output of bright areas to enhance the image's contrast and depth; while when displaying documents, it reduces the output power of bright areas to make the overall brightness distribution more uniform, thereby reducing user eye strain. The closed-loop control process of the feedback correction mechanism ensures the consistency between the actual brightness value and the target value, thereby improving system reliability and user experience.

[0066] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this specification can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0067] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. This disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

Claims

1. A method for adjusting the brightness of an LED display screen, characterized in that, Includes the following steps: Acquire light intensity data, which includes ambient light intensity data collected by distributed sensing components and brightness intensity data of display screen partitions; The luminous intensity data of the light intensity data is processed to obtain the brightness uniformity index, and combined with the ambient light intensity data to output a dynamic adjustment command; The dynamic adjustment command is converted into partition drive parameters; Adjust the brightness level of each display partition according to the partition driving parameters.

2. The method according to claim 1, characterized in that, The ambient light intensity data is obtained by acquiring the illuminance of each zone of the LED display screen, thus obtaining the ambient light distribution matrix. The ambient light distribution matrix is ​​then normalized using a normalization formula to obtain standardized ambient light intensity data.

3. The method according to claim 1, characterized in that, The brightness uniformity index is obtained by processing the luminous intensity data: the brightness uniformity index of each region is calculated based on the brightness intensity data of the distributed sensing components. The formula for calculating the brightness uniformity index is as follows: U std U is the standard deviation of the luminance uniformity index; grad Gradient brightness uniformity index; U corr The correlation brightness uniformity index; α, β, and γ are weighting coefficients, representing U, respectively. std U grad U corr Importance in overall brightness uniformity assessment.

4. The method according to claim 1, characterized in that, The process of generating dynamic adjustment instructions by combining ambient light intensity distribution data is as follows: obtain the brightness data of the target zone based on the brightness intensity data of the display screen zones and the ambient light intensity data. An adjustment strategy is formulated based on the brightness of the target zone and the ambient light intensity, and a dynamic adjustment command is generated based on the adjustment strategy.

5. The method according to claim 4, characterized in that, The formula for the brightness of the target partition is: base 1 2 total in, Represented for each partition Brightness; Represents basic brightness; Represents the ambient light response coefficient; Represents the uniformity compensation coefficient ( ); This represents a deviation in uniformity.

6. The method according to claim 4, characterized in that, The step of converting the dynamic adjustment command into partition drive parameters is: Based on the target brightness value in the dynamic adjustment instruction, the corresponding driving parameters for each partition are obtained, wherein the driving parameters are the driving current magnitude.

7. The method according to claim 1, characterized in that, The method also includes a feedback correction mechanism, specifically comprising the following steps: After adjusting the brightness level of the display partition according to the partition driving parameters, the feedback value of the actual brightness value of the area is then obtained. Compare the feedback value with the target brightness value; If a deviation exists, the adjustment command is regenerated and sent to the partition drive unit.

8. A brightness control device for LED displays adaptable to multiple scenarios, characterized in that, include: A distributed sensing component is used to acquire light intensity data, which includes ambient light intensity data and brightness intensity data of display screen partitions collected by the distributed sensing component. The central processing module processes the luminous intensity data of the light intensity data to obtain the brightness uniformity index, and outputs dynamic adjustment instructions in combination with the ambient light intensity data. The signal conversion module is used to convert dynamic adjustment commands into partition drive parameters; The partition driving unit adjusts the brightness level of each partition of the display screen according to the partition driving parameters.

9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the method according to any one of claims 1 to 7.

10. A computer-readable medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 1 to 7.

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