LED dimming device and method thereof

Abstract

The invention relates to the technical field of intelligent dimming, and discloses an LED dimming device and method, and the method comprises the steps: obtaining a dimming instruction, determining a dimming node based on the dimming instruction, obtaining an LED dimming device, obtaining the monitoring time in real time, obtaining an environment illumination sequence based on an environment illumination sensor when the monitoring time enters a collection time period, and obtaining an LED dimming node according to the environment illumination sequence. When the monitoring time enters the analysis period, acquiring an environment illumination predicted value based on the environment illumination sequence, acquiring a target illumination value, acquiring a current illumination value of the LED load, performing dimming operation on the LED load based on the compensation luminous flux, the second integrated controller, the converter and the third integrated controller to obtain an adjusted LED load, acquiring the illumination of the adjusted LED load, and adjusting the illumination of the adjusted LED load according to the illumination of the adjusted LED load. And after the condition that the illumination after dimming and the target illumination value meet a preset verification condition is confirmed, dimming control of the LED load is realized. Therefore, the flexibility and adaptability of LED dimming control can be improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent dimming technology, and in particular to an LED dimming device and method thereof. Background Art

[0002] As demands for lighting quality continue to rise, a single brightness mode can no longer meet the needs of diverse scenarios. For example, in offices, different time periods and tasks require varying light intensities to ensure productivity and visual comfort. In commercial spaces, appropriate lighting adjustments can create an atmosphere that attracts customers. LED dimming not only allows for flexible brightness adjustment but also intelligently controls based on factors such as ambient light and time of day, thereby achieving multiple goals, including energy savings, improved lighting quality, and extended lamp life. It is a key development direction in lighting technology.

[0003] Currently, most LED dimming methods use traditional methods, but they only adjust brightness based on simple manual settings or fixed programs. They are unable to perceive changes in ambient light in real time. As a result, when the ambient light is sufficient, the LED lights may still operate at a high brightness, causing energy waste. When the ambient light suddenly dims, the brightness cannot be adjusted in time, affecting the lighting effect.

[0004] While traditional methods can achieve LED dimming requirements to a certain extent, they suffer from low control accuracy and lack intelligent scene mode and activity pattern recognition capabilities, making them difficult to adapt to complex and changing real-world scenarios. Therefore, the flexibility and adaptability of LED dimming control needs to be improved. Summary of the Invention

[0005] The present invention provides an LED dimming method and a computer-readable storage medium, the main purpose of which is to improve the flexibility and adaptability of LED dimming control.

[0006] To achieve the above objectives, the present invention provides an LED dimming method, comprising: Obtaining a dimming instruction, and determining a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode; Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes a demodulation unit and a driving unit; Dividing the control period into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period, and a stabilization period; Perform the following operations on each of one or more sub-periods: Acquire monitoring time in real time, and when the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes a plurality of ambient illumination values, and when the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence; Obtaining a target illuminance value, confirming an operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state, and after confirming that the operating state of the LED load is the on state, obtaining a current illuminance value of the LED load, and obtaining a compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value; performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load; The illuminance of the LED load after adjustment is obtained, and the illuminance after dimming is obtained. After confirming that the illuminance after dimming and the target illuminance value meet the preset verification conditions, the dimming control of the LED load is realized.

[0007] Optionally, acquiring an ambient illumination sequence based on the ambient illumination sensor includes: Dividing the collection period into a plurality of collection sub-periods using a preset method, wherein each collection sub-period includes a collection period and a post-collection period; Sorting the multiple acquisition sub-periods in order from front to back according to the time corresponding to the acquisition sub-periods to obtain an acquisition sub-period sequence; Sequentially extracting analysis acquisition sub-periods from the acquisition sub-period sequence, and identifying reference acquisition sub-periods in the acquisition sub-period sequence based on the analysis acquisition sub-periods, wherein the reference acquisition sub-period is adjacent to and lags behind the analysis acquisition sub-period in the acquisition sub-period sequence; When the monitoring time enters the collection period corresponding to the analysis and collection sub-period, the ambient illumination subset corresponding to the analysis and collection sub-period is obtained based on the preset basic collection times and the ambient illumination sensor, wherein the ambient illumination subset includes multiple ambient illumination values; When the monitoring time enters the post-collection period corresponding to the analysis and collection sub-period, the plurality of ambient illumination values ​​in the ambient illumination subset are sorted in order from front to back according to the time corresponding to the ambient illumination value to obtain a first ambient illumination value sequence; A first node set is obtained based on the first ambient illumination value sequence, wherein the first node set includes a plurality of first nodes, and the first node set is expressed as: ; in, represents the collection node set, 、 、 、 、 、 、 and Respectively represent the first, second, third, fourth, and , , The and the ambient illumination values, 、 、 、 and Respectively represent the first, second, third, and A First node; The following operations are performed on each first node in the first node set: Calculate the absolute difference between the two ambient illumination values ​​at the first node to obtain the absolute illumination difference; Summarizing the absolute illumination differences to obtain an absolute illumination difference set; The following operations are performed on each absolute illumination difference value in the absolute illumination difference value set: Comparing the absolute illumination difference with a preset absolute illumination threshold; If the absolute illumination difference is greater than the absolute illumination threshold, the absolute illumination difference is used as a fast absolute illumination difference; Summarizing the fast absolute illumination difference values ​​to obtain a fast absolute illumination difference value set; Counting the number of fast absolute illumination differences in the fast absolute illumination difference set and the number of first nodes in the first node set respectively to obtain the number of fast changes and the number of first nodes; Calculating the ratio of the number of rapid changes to the number of first nodes to obtain a rapid change ratio; Calculate the mean of all absolute illumination differences in the absolute illumination difference set to obtain the mean absolute illumination difference; Obtaining the second acquisition times using the rapid change ratio and the average of the absolute illumination difference; When the monitoring time enters the collection period corresponding to the reference collection sub-period, acquiring the ambient illumination subset corresponding to the reference collection sub-period based on the second collection number and the ambient illumination sensor; After confirming that the corresponding ambient illumination subset is obtained for each acquisition sub-period in the acquisition sub-period sequence, the ambient illumination subsets are aggregated to obtain an ambient illumination set; The multiple ambient illumination values ​​are sorted in order from front to back according to the time corresponding to the ambient illumination values ​​in the ambient illumination set to obtain an ambient illumination sequence.

[0008] Optionally, obtaining the second acquisition number by using the rapid change ratio and the average of the absolute illumination difference includes: The second acquisition times acquisition scheme is constructed using the rapid change ratio and the average value of the absolute illumination difference. The second acquisition times acquisition scheme is as follows: ; in, represents the rapid change ratio, Indicates the preset change ratio threshold, Indicates the total absolute illumination difference The absolute illuminance difference, represents the mean value of the absolute illumination difference, Indicates the preset absolute illumination change threshold, Indicates the basic collection times, represents the second acquisition times, and Both represent preset adjustment coefficients. Indicates rounding down; A second acquisition number is acquired based on a second acquisition number acquisition scheme.

[0009] Optionally, obtaining the ambient illumination prediction value based on the ambient illumination sequence includes: Respectively obtain the time intervals corresponding to the analysis period, the transmission period, and the dimming period to obtain the analysis time interval, the transmission time interval, and the dimming time interval; The ambient illumination prediction value is obtained based on the ambient illumination sequence, the analysis time interval, the transmission time interval, the dimming time interval, and the pre-built ambient illumination prediction value calculation formula, wherein the ambient illumination prediction value calculation formula is as follows: ; in, represents the predicted value of the ambient illumination, Indicates that there are a total of Ambient illumination value, 、 and Respectively represent the first , A Ambient illumination value, represents the analysis time interval, represents the transmission time interval, Indicates the dimming time interval.

[0010] Optionally, obtaining the target illuminance value and confirming the operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller includes: Using the current scene mode, a plurality of reference illumination nodes are identified in a pre-built reference illumination information library, wherein the scene mode corresponding to each of the plurality of reference illumination nodes is the current scene mode, and each reference illumination node includes a reference illumination value and a reference activity mode; Using the current activity mode, a current illumination node is identified from a plurality of reference illumination nodes, wherein the reference activity mode corresponding to the current illumination node is the current activity mode; Extracting a reference illuminance value from the current illuminance node, and taking the reference illuminance value as the target illuminance value; Compare the target illuminance value with the predicted ambient illuminance value; If the target illuminance value is less than the predicted value of the ambient illuminance, the operating state of the LED load is set to the off state by using the first integrated controller; otherwise, the operating state of the LED load is set to the on state.

[0011] Optionally, obtaining the compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value includes: The area of ​​the current scene is obtained by using a preset measurement technology to obtain the current area of ​​the area, and the compensation luminous flux is obtained based on the current illuminance value, the ambient illuminance prediction value, the target illuminance value, the current area of ​​the area and the pre-built luminous flux calculation formula.

[0012] Optionally, performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load includes: generating an initial dimming parameter value by using the compensated luminous flux and a dimming parameter value generating unit corresponding to the second integrated controller; Obtaining an updated dimming parameter value based on the initial dimming parameter value and a pre-established verification method; When the monitoring time enters the transmission period of the sub-period, a modulation signal is obtained by using the updated dimming parameter value and the modulation unit corresponding to the second integrated controller, and a target switching ripple is obtained based on the modulation signal and the converter; The target switch ripple is transmitted to the third integrated controller by using the common DC bus, and the demodulated dimming parameter value is obtained by using the demodulation unit corresponding to the third integrated controller and the target switch ripple; When the monitoring time enters the dimming period of the sub-period, a dimming operation is performed on the LED load based on the driving unit corresponding to the third integrated controller and the demodulated dimming parameter value to obtain an adjusted LED load.

[0013] Optionally, the acquiring an updated dimming parameter value based on the initial dimming parameter value and a pre-established verification method includes: Using the temperature sensor to collect the current temperature, and determining whether the current temperature is within a preset temperature range; If the current temperature is within the temperature range, obtain the light efficiency attenuation rate corresponding to the current temperature; Obtain the dimming information update ratio based on the light efficiency decay rate and the pre-built calculation formula; An updated dimming parameter value is obtained based on the dimming parameter value update ratio and the initial dimming parameter value.

[0014] Optionally, after confirming that the dimming illuminance and the target illuminance value meet a preset verification condition, the method further includes: Obtain the reference illumination error ratio based on the ambient illumination sequence and the pre-built illumination error ratio calculation formula; Calculate the absolute difference between the illuminance after dimming and the target illuminance value to obtain the absolute illuminance difference; Obtaining an illumination error ratio based on the illumination absolute difference and the target illumination value, wherein the illumination error ratio is a ratio of the illumination absolute difference to the target illumination value; comparing the illumination error ratio with the reference illumination error ratio; If the illuminance error ratio is greater than the reference illuminance error ratio, a pre-built adjustment method is used to obtain the updated dimming illuminance and the updated dimming illuminance is used as the dimming illuminance. Return to the step of calculating the absolute difference between the dimming illuminance and the target illuminance value to obtain the absolute illuminance difference, until the illuminance error ratio is less than or equal to the reference illuminance error ratio, thereby realizing dimming control of the LED load.

[0015] To achieve the above object, the present invention further provides an LED dimming system, comprising: A dimming device acquisition module is used to obtain a dimming instruction and determine a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode; Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes a demodulation unit and a driving unit; a dimming acquisition module, configured to divide the control period into one or more sub-periods based on a current scene mode and a current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period, and a stabilization period; Perform the following operations on each of one or more sub-periods: Acquire monitoring time in real time, and when the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes a plurality of ambient illumination values, and when the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence; a dimming parameter transmission module, configured to obtain a target illuminance value, confirm an operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is either an on state or an off state; after confirming that the operating state of the LED load is the on state, obtain a current illuminance value of the LED load; and obtain a compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value; performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load; The post-dimming evaluation module is used to obtain the illuminance of the LED load after adjustment, obtain the post-dimming illuminance, and implement dimming control of the LED load after confirming that the post-dimming illuminance and the target illuminance value meet the preset verification conditions.

[0016] In order to solve the above problem, the present invention further provides an electronic device, comprising: A memory storing at least one instruction; and a processor executing the instruction stored in the memory to implement the above-mentioned LED dimming method.

[0017] In order to solve the above problem, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores at least one instruction, and the at least one instruction is executed by a processor in an electronic device to implement the above-mentioned LED dimming method.

[0018] The present invention is to solve the problem described in the background technology. The present invention obtains a dimming instruction and confirms a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode and a current activity mode, and obtains an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller and a third integrated controller, the second integrated controller includes: a dimming parameter value generation unit and a modulation unit, the third integrated controller includes: a demodulation unit and a drive unit, and the control period is divided into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period and a stabilization period. It can be seen that the present invention ensures that it can respond to changes in ambient illumination values ​​in a timely manner by dividing the control period into acquisition, analysis, transmission, dimming and stabilization periods, and maintains stable operation after dimming, thereby meeting the lighting needs in different scenes and activity modes and improving lighting quality and energy utilization efficiency. The monitoring time is acquired in real time. When the monitoring time enters the acquisition period, the ambient illumination sequence is acquired based on the ambient illumination sensor, wherein the ambient illumination sequence includes multiple ambient illumination values. When the monitoring time enters the analysis period, the ambient illumination prediction value is acquired based on the ambient illumination sequence. It can be seen that the present invention ensures high-density sampling when the ambient illumination value changes suddenly by adaptively adjusting the acquisition frequency, and performs low-density sampling when the ambient illumination value is stable, thereby avoiding the loss of key ambient illumination values ​​during sudden changes and excessive acquisition during stability to cause waste of resources, thereby improving the adaptability of the LED dimming device, and using the ambient illumination prediction value calculation formula to calculate the relative change rate of adjacent illumination values, accurately reflecting the real-time change trend of the ambient illumination, and comprehensively considering the time intervals of the three stages of analysis, transmission, and dimming to make the ambient illumination prediction value more in line with reality, thereby improving the accuracy of the prediction. Obtain a target illuminance value, and confirm the operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state. After confirming that the operating state of the LED load is an on state, obtain the current illuminance value of the LED load, and obtain the compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value. It can be seen that the present invention obtains the target illuminance value by referring to the illuminance information library and compares it with the predicted ambient illuminance value, so as to realize turning on the LED only when the light is insufficient, realizing precise on-demand lighting, avoiding energy waste, reducing manual intervention, and significantly improving lighting quality and energy efficiency. The compensation luminous flux is obtained by the luminous flux calculation formula, so as to realize both meeting the illumination requirements and maximizing energy saving, supplying light on demand, and achieving dual optimization of comfort and energy efficiency.Based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller, dimming the LED load to obtain an adjusted LED load. This demonstrates that the present invention dynamically adjusts the initial dimming parameter values ​​by compensating for the luminous flux and taking into account the impact of ambient temperature on the actual luminous efficiency of the LED load, ensuring that the LED load can still achieve the target illuminance value at different temperatures. This process utilizes a temperature sensor to monitor the actual temperature, calculates and updates the dimming parameter values ​​based on the luminous efficiency decay rate, and then precisely controls the LED brightness through modulation, transmission, and demodulation, achieving efficient and energy-saving intelligent dimming. The illuminance of the adjusted LED load is obtained to obtain the post-dimming illuminance. After confirming that the post-dimming illuminance and the target illuminance value meet preset verification conditions, dimming control of the LED load is implemented. This demonstrates that the present invention dynamically adjusts the reference illuminance error ratio through the ambient illuminance sequence. When the ambient illuminance value changes rapidly, the reference illuminance error ratio is relaxed to avoid frequent adjustments, while when the ambient illuminance value changes slowly, the reference illuminance error ratio is tightened, enhancing the adaptability and reliability of the dimming device and achieving efficient and intelligent dimming. Therefore, the present invention can improve the flexibility and adaptability of LED dimming control. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic flow chart of an LED dimming method provided in one embodiment of the present invention; Figure 2 A functional module diagram of an LED dimming system provided by one embodiment of the present invention; Figure 3 A schematic structural diagram of an electronic device for implementing the LED dimming method provided by an embodiment of the present invention; Figure 4 This is a structural diagram of an LED dimming device provided by an embodiment of the present invention.

[0020] Description of reference numerals: 1. Electronic device; 10. Processor; 11. Storage; 12. Bus.

[0021] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0022] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The present invention provides an LED dimming method. The method may be performed by at least one of a server, a terminal, or other electronic device capable of executing the method provided by the present invention. In other words, the method may be performed by software or hardware installed on a terminal or server device, where the software may be a blockchain platform. The server may include, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0024] Reference Figure 1 FIG. 1 is a flow chart of an LED dimming method according to an embodiment of the present invention. In this embodiment, the LED dimming method includes: S1. Obtain a dimming instruction, and identify a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode.

[0025] It is understood that the dimming command is issued by a person who wants to dim the LED load. The dimming node is a set of key parameters used to determine the specific implementation details of the dimming operation, such as the control period (when dimming is performed), the current scene mode (such as office scene, home scene, etc.), and the current activity mode (such as working, studying, resting, etc.).

[0026] For example, Xiao Zhang plans to work in a certain office area from 8:00:00 to 12:00:00 in the morning on a certain day, wherein 8:00:00 to 12:00:00 in the morning is the control period, the certain office area is the current scene mode, and working is the current activity mode.

[0027] S2. Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes: a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes: a demodulation unit and a driving unit.

[0028] It should be understood that the LED dimming device is an intelligent lighting system that collects temperature and ambient illumination information through components such as ambient illumination sensors and temperature sensors, processes and transmits dimming parameter values ​​through multiple integrated controllers, and ultimately drives the LED load to achieve precise dimming to meet lighting needs in different scenes and conditions. For details, see Figure 4 As shown, Figure 4This is a schematic diagram of the structure of an LED dimming device. An ambient illuminance / temperature sensor is used to collect ambient illuminance values ​​and current temperature. This is processed by an integrated controller to generate dimming parameter values ​​and drive the LED load for dimming operations, achieving precise dimming and temperature-adaptive control. The ambient illuminance sensor is used to monitor ambient light intensity and provide ambient illuminance values ​​for dimming. Optionally, an OPT3004 can be used as the ambient illuminance sensor to achieve this process. Other ambient illuminance sensor models can achieve the same effect and are not described here. The temperature sensor is used to detect the operating temperature of the LED load, adjusting the dimming parameter values ​​based on temperature changes to ensure stable performance of the LED load at different temperatures. Optionally, a DS18B20 can be used as the temperature sensor to achieve this process. Other temperature sensor models can achieve the same effect and are not described here. The converter is a key component in the LED dimming device, used to convert the input power into a DC voltage and current suitable for the LED load. Optionally, a Boost converter can be used to achieve this process. The LED load is the LED lamp being dimmed and is the direct target of the dimming operation. The common DC bus is used to transmit DC power within the LED dimming device and connect components such as the converter and the integrated controller. The first integrated controller, the second integrated controller, and the third integrated controller are all important components in the LED dimming device. The difference is that the first integrated controller is responsible for the overall control logic and data processing, including receiving dimming instructions and processing data from various sensors. The second integrated controller includes a dimming parameter value generation unit and a modulation unit, which are mainly used to generate dimming parameter values ​​and perform modulation. Specifically, the dimming parameter value generation unit generates an initial dimming parameter value and uses the modulation unit to modulate the generated dimming parameter value into a signal format suitable for transmission so that it can be transmitted to the third integrated controller via the common DC bus. The third integrated controller includes a demodulation unit and a drive unit, which are mainly used to demodulate the dimming parameter value and drive the LED load. Specifically, by receiving the modulated signal transmitted from the common DC bus and demodulating it back to the dimming parameter value, the drive unit is used to drive the LED load according to the demodulated dimming parameter value to achieve a specific dimming operation.

[0029] S3. Divide the control period into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period, and a stabilization period.

[0030] For example, assuming the control period is from 8:00:00 to 12:00:00 in the morning on a certain day, the control period is divided into four sub-periods, with each hour being a sub-period: 8:00:00 to 9:00:00, 9:00:00 to 10:00:00, 10:00:00 to 11:00:00, and 11:00:00 to 12:00:00. Each sub-period consists of a collection period, an analysis period, a transmission period, a dimming period, and a stabilization period. The collection period is a specific time period within the sub-period for collecting ambient illumination values ​​via the ambient illumination sensor. During this period, ambient illumination values ​​are obtained, providing basic data for subsequent analysis and dimming operations. The analysis period is a specific time period within the sub-period for processing the collected ambient illumination values. During this period, the collected ambient illumination values ​​are analyzed, a predicted ambient illumination value is calculated, and a target illumination value is determined based on the current scene mode and current activity mode. The transmission period is a specific time period within the sub-period for transmitting the dimming parameter value from the second integrated controller to the third integrated controller. During this period, the modulated dimming parameter is transmitted to the third integrated controller via the common DC bus to prepare for the dimming operation. The dimming period is a specific time period within the sub-period for driving the LED load to perform the actual dimming operation based on the demodulated dimming parameter value. During this period, the driving unit of the third integrated controller adjusts the brightness of the LED load based on the demodulated dimming parameter value. The stabilization period refers to the period during which parameters such as the brightness of the LED load reach and remain stable after the dimming period.

[0031] For example, taking the sub-period from 8:00:00 to 9:00:00 as an example: the acquisition period can be set to 8:00:00 to 8:05:00, the analysis period can be set to 8:05:00 to 8:08:00, the transmission period can be set to 8:08:00 to 8:10:00, the dimming period is set to 8:10:00 to 8:15:00, and the stabilization period is set to 8:15:00 to 9:00:00. By dividing the control period into acquisition, analysis, transmission, dimming, and stabilization periods, the embodiment of the present invention ensures timely response to changes in ambient illuminance values ​​and maintains stable operation after dimming, thereby meeting lighting requirements in different scenarios and activity modes and improving lighting quality and energy efficiency.

[0032] S4. Acquire the monitoring time in real time. When the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes multiple ambient illumination values. When the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence.

[0033] For example, assuming that the collection period is set to 8:00:00 to 8:05:00, when the monitoring time enters the starting time point 8:00:00 of the collection period, the ambient illumination sequence is acquired by using the ambient illumination sensor within the collection period 8:00:00 to 8:05:00.

[0034] It should be explained that the acquiring of the ambient illumination sequence based on the ambient illumination sensor includes: Dividing the collection period into a plurality of collection sub-periods using a preset method, wherein each collection sub-period includes a collection period and a post-collection period; Sorting the multiple acquisition sub-periods in order from front to back according to the time corresponding to the acquisition sub-periods to obtain an acquisition sub-period sequence; Sequentially extracting analysis acquisition sub-periods from the acquisition sub-period sequence, and identifying reference acquisition sub-periods in the acquisition sub-period sequence based on the analysis acquisition sub-periods, wherein the reference acquisition sub-period is adjacent to and lags behind the analysis acquisition sub-period in the acquisition sub-period sequence; When the monitoring time enters the collection period corresponding to the analysis and collection sub-period, the ambient illumination subset corresponding to the analysis and collection sub-period is obtained based on the preset basic collection times and the ambient illumination sensor, wherein the ambient illumination subset includes multiple ambient illumination values; When the monitoring time enters the post-collection period corresponding to the analysis and collection sub-period, the plurality of ambient illumination values ​​in the ambient illumination subset are sorted in order from front to back according to the time corresponding to the ambient illumination value to obtain a first ambient illumination value sequence; A first node set is obtained based on the first ambient illumination value sequence, wherein the first node set includes a plurality of first nodes, and the first node set is expressed as: ; in, represents the collection node set, 、 、 、 、 、 、 and Respectively represent the first, second, third, fourth, and , , The and the ambient illumination values, 、 、 、 and Respectively represent the first, second, third, and A First node; The following operations are performed on each first node in the first node set: Calculate the absolute difference between the two ambient illumination values ​​at the first node to obtain the absolute illumination difference; Summarizing the absolute illumination differences to obtain an absolute illumination difference set; The following operations are performed on each absolute illumination difference value in the absolute illumination difference value set: Comparing the absolute illumination difference with a preset absolute illumination threshold; If the absolute illumination difference is greater than the absolute illumination threshold, the absolute illumination difference is used as a fast absolute illumination difference; Summarizing the fast absolute illumination difference values ​​to obtain a fast absolute illumination difference value set; Counting the number of fast absolute illumination differences in the fast absolute illumination difference set and the number of first nodes in the first node set respectively to obtain the number of fast changes and the number of first nodes; Calculating the ratio of the number of rapid changes to the number of first nodes to obtain a rapid change ratio; Calculate the mean of all absolute illumination differences in the absolute illumination difference set to obtain the mean absolute illumination difference; Obtaining the second acquisition times using the rapid change ratio and the average of the absolute illumination difference; When the monitoring time enters the collection period corresponding to the reference collection sub-period, acquiring the ambient illumination subset corresponding to the reference collection sub-period based on the second collection number and the ambient illumination sensor; After confirming that the corresponding ambient illumination subset is obtained for each acquisition sub-period in the acquisition sub-period sequence, the ambient illumination subsets are aggregated to obtain an ambient illumination set; The multiple ambient illumination values ​​are sorted in order from front to back according to the time corresponding to the ambient illumination values ​​in the ambient illumination set to obtain an ambient illumination sequence.

[0035] For example, assuming that the collection period is from 8:00:00 to 8:05:00, the collection period is divided into multiple collection sub-periods using a preset method. The method may be that the time interval corresponding to each collection sub-period is 30 seconds, so the multiple collection sub-periods are {8:00:00-8:00:30, 8:00:30-8:01:00, 8:01:00-8:01:30, 8:01:30-8:02:00, 8:02:00 0-8:02:30, 8:02:30-8:03:00, 8:03:00-8:03:30, 8:03:30-8:04:00, 8:04:00-8:04:30, 8:04:30-8:05:00}, and each acquisition sub-period includes the acquisition period and the post-acquisition period, so part of the duration of each acquisition sub-period (the acquisition period) is used to collect the ambient illumination value and the remaining duration (the post-acquisition period) is used for analysis The collected ambient illumination value is exemplified. Here, only the collection sub-period 8:00:00-8:00:30 is taken as an example. 8:00:00-8:00:20 can be set as the collection period for collecting ambient illumination values, and 8:00:20-8:00:30 can be set as the collection period for analyzing the collected ambient illumination values. The multiple collection sub-periods are sorted in order from front to back according to the time corresponding to the collection sub-period, and the collection sub-period sequence is obtained as {8 :00:00-8:00:30, 8:00:30-8:01:00, 8:01:00-8:01:30, 8:01:30-8:02:00, 8:02:00-8:02:30, 8:02:30-8:03:00, 8:03:00-8:03:30, 8:03:30-8:04:00, 8:04:00-8:04:30, 8:04:30-8:05:00}. 8:00:00-8:00:30 is the analysis and acquisition sub-period, and the corresponding reference acquisition sub-period is 8:00:30-8:01:00. When the monitoring time enters the starting time point 8:00:00 of the acquisition period corresponding to the analysis and acquisition sub-period, the basic acquisition times and the ambient illumination sensor are used to obtain the ambient illumination subset corresponding to the analysis and acquisition sub-period within the period of 8:00:00-8:00:20. If the basic acquisition times are The number of collection times is 5, and the collection can be performed at the time points 8:00:03, 8:00:07, 8:00:10, 8:00:13, and 8:00:16 respectively. The ambient illumination subset corresponding to the analysis and collection sub-periods is {8:00:03-300lx, 8:00:07-310lx, 8:00:10-336lx, 8:00:13-340lx, 8:00:16-360lx}.When the monitoring time enters the starting time point 8:00:20 of the post-collection period 8:00:20-8:00:30 corresponding to the analysis and collection sub-period, multiple ambient illumination values ​​are sorted in order from front to back according to the time corresponding to the ambient illumination value in the ambient illumination subset, and the first ambient illumination value sequence is obtained as {300lx, 310lx, 336lx, 340lx, 360lx}, and the first node set is obtained based on the first ambient illumination value sequence as {(300lx, 310lx), (310lx, 336lx), (336lx, 340lx), (340lx, 360lx)}. Taking the first node (300lx, 310lx) as an example: Calculate the absolute difference between the two ambient illumination values ​​in the first node and obtain an absolute illumination difference of 10lx. Based on the first node set, the absolute illumination difference set can be obtained as {10lx, 26lx, 4lx, 20lx}. Assuming that the preset absolute illumination threshold is 5lx, the absolute illumination difference value greater than the absolute illumination threshold is used as the fast absolute illumination difference value, and the corresponding fast absolute illumination difference values ​​are 10lx, 26lx, and 20lx, with a fast change ratio of 3 / 4. Calculate the average of all absolute illumination differences in the absolute illumination difference set {10lx, 26lx, 4lx, 20lx} and obtain an absolute illumination difference average of 15lx.

[0036] Specifically, the method of obtaining the second acquisition number by using the rapid change ratio and the average of the absolute illumination difference includes: The second acquisition times acquisition scheme is constructed using the rapid change ratio and the average value of the absolute illumination difference. The second acquisition times acquisition scheme is as follows: ; in, represents the rapid change ratio, Indicates the preset change ratio threshold, Indicates the total absolute illumination difference The absolute illuminance difference, represents the mean value of the absolute illumination difference, Indicates the preset absolute illumination change threshold, Indicates the basic collection times, represents the second acquisition times, and Both represent preset adjustment coefficients. Indicates rounding down; A second acquisition number is acquired based on a second acquisition number acquisition scheme.

[0037] It is understandable that, from the above example, the rapid change ratio is 3 / 4 and the average absolute illuminance difference is 15lx. Assuming that the change ratio threshold is 1 / 2 and the absolute illuminance change threshold is 10lx, the preset adjustment coefficients are both 0.2. is 5, the adjustment coefficient and They are the weight coefficients of the rapid change ratio and the weight coefficient of the average absolute illumination difference, respectively. and It can realize dynamic optimization of acquisition frequency. From the above example, we can conclude that the rapid change ratio Greater than the change ratio threshold And the mean absolute illumination difference Greater than the absolute illumination change threshold , so the second acquisition number is obtained Otherwise, the second acquisition times .

[0038] For example, when the monitoring time enters the starting time point 8:00:30 of the collection period 8:00:30-8:00:50 corresponding to the reference collection sub-period, the ambient illumination sensor is used to perform multiple collections within the collection period 8:00:30-8:00:50, where the number of collections is the second collection number. The principle for obtaining the second collection number is as follows: the second collection number is confirmed based on the degree of fluctuation of the ambient illumination value in the ambient illumination subset corresponding to the analysis collection sub-period. If the rapid change ratio of the analyzed collection sub-period is high and the mean value of the ambient illumination difference is large, indicating that the ambient illumination changes frequently at this time, the collection number of subsequent collection sub-periods can be appropriately increased according to the second collection number acquisition plan, which can improve the accuracy of subsequent analysis using ambient illumination values. Similarly, if the acquisition sub-period 8:00:30-8:01:00 is used as the analysis acquisition sub-period, the acquisition times corresponding to the next acquisition sub-period 8:01:00-8:01:30 can be obtained according to the second acquisition times acquisition scheme. After the corresponding ambient illumination subset is obtained for each acquisition sub-period, the ambient illumination subset is aggregated to obtain an ambient illumination set. The multiple ambient illumination values ​​are sorted from front to back in the order of the time corresponding to the ambient illumination value in the ambient illumination set to obtain an ambient illumination sequence. The embodiment of the present invention ensures high-density sampling when the ambient illumination value suddenly changes and low-density sampling when the ambient illumination value is stable by adaptively adjusting the acquisition frequency, thereby avoiding the loss of key ambient illumination values ​​when sudden changes occur and the waste of resources caused by excessive acquisition when stable, thereby improving the adaptability of the LED dimming device.

[0039] Furthermore, obtaining the predicted value of the ambient illumination based on the ambient illumination sequence includes: Respectively obtain the time intervals corresponding to the analysis period, the transmission period, and the dimming period to obtain the analysis time interval, the transmission time interval, and the dimming time interval; The ambient illumination prediction value is obtained based on the ambient illumination sequence, the analysis time interval, the transmission time interval, the dimming time interval, and the pre-built ambient illumination prediction value calculation formula, wherein the ambient illumination prediction value calculation formula is as follows: ; in, represents the predicted value of the ambient illumination, Indicates that there are a total of Ambient illumination value, 、 and Respectively represent the first , A Ambient illumination value, represents the analysis time interval, represents the transmission time interval, Indicates the dimming time interval.

[0040] For example, taking the sub-period from 8:00:00 to 9:00:00 as an example: the collection period is from 8:00:00 to 8:05:00, the analysis period is from 8:05:00 to 8:08:00, the transmission period is from 8:08:00 to 8:10:00, the dimming period is from 8:10:00 to 8:15:00, and the stabilization period is from 8:15:00 to 9:00:00. The corresponding analysis time interval, transmission time interval, and dimming time interval are 5 minutes, 3 minutes, and 2 minutes, respectively. The ambient illumination prediction value is calculated using the ambient illumination prediction value calculation formula. The embodiment of the present invention uses the ambient illumination prediction value calculation formula to calculate the relative change rate of adjacent illumination values, accurately reflecting the real-time change trend of the ambient illumination, and comprehensively considering the time intervals of the three stages of analysis, transmission, and dimming to make the ambient illumination prediction value more in line with reality, thereby improving the accuracy of the prediction.

[0041] S5. Obtain a target illuminance value, and confirm the operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state. After confirming that the operating state of the LED load is an on state, obtain the current illuminance value of the LED load, and obtain the compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value.

[0042] It should be explained that the obtaining of the target illuminance value and confirming the operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value and the first integrated controller include: Using the current scene mode, a plurality of reference illumination nodes are identified in a pre-built reference illumination information library, wherein the scene mode corresponding to each of the plurality of reference illumination nodes is the current scene mode, and each reference illumination node includes a reference illumination value and a reference activity mode; Using the current activity mode, a current illumination node is identified from a plurality of reference illumination nodes, wherein the reference activity mode corresponding to the current illumination node is the current activity mode; Extracting a reference illuminance value from the current illuminance node, and taking the reference illuminance value as the target illuminance value; Compare the target illuminance value with the predicted ambient illuminance value; If the target illuminance value is less than the predicted value of the ambient illuminance, the operating state of the LED load is set to the off state by using the first integrated controller; otherwise, the operating state of the LED load is set to the on state.

[0043] It should be understood that the reference illuminance information library is a pre-stored database containing reference illuminance values ​​under different scene modes (such as office scenes, home scenes) and activity modes (such as office, study, and rest), which is used for LED dimming devices to quickly match current dimming requirements. The reference illuminance value is confirmed using the scene-activity dual dimension. For example, office + office → 400lx means that the reference illuminance value for the office activity mode in the office scene mode is 400lx. Generally speaking, a variety of activities will be carried out in a certain scene mode. For example, you can work during office hours in the office and rest during rest time. Therefore, the same scene mode can correspond to multiple activity modes, and different activity modes have different requirements for reference illuminance values.

[0044] For example, assuming that the current scene mode is office and the current activity mode is office, the current scene mode office is used to identify multiple reference illumination nodes in the reference illumination information library, namely office + office → 400lx, office + rest → 100lx, and office + entertainment → 300lx. According to the current activity mode office, the current illumination node is identified as office + office → 400lx among the multiple reference illumination nodes, so the reference illumination value is 400lx, and the reference illumination value 400lx is used as the target illumination value. If the predicted ambient illumination value is 300lx, the predicted ambient illumination value 300lx is less than the target illumination value 400lx, indicating that the current ambient illumination cannot meet the illumination requirement for working in the office. Therefore, the first integrated controller is used to set the operating state of the LED load to the on state. If the predicted ambient illumination value is 500lx, which is greater than the target illumination value 400lx, the illumination requirement at this time can be met, and the operating state of the LED load is set to the off state. The LED load's off state is when it is powered off and stops emitting light, with the output luminous flux reaching zero. The LED load's on state is when it is powered on and outputting the target luminous flux. This embodiment of the present invention obtains a target illuminance value by referencing an illuminance information database and compares it with a predicted ambient illuminance value. This enables the LED load to be turned on only when the lighting is insufficient, achieving precise, on-demand lighting, avoiding energy waste, and reducing manual intervention, significantly improving lighting quality and energy efficiency.

[0045] Specifically, the method of obtaining the compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value includes: The area of ​​the current scene is obtained by using a preset measurement technology to obtain the current area of ​​the area. The compensation luminous flux is obtained based on the current illuminance value, the predicted ambient illuminance value, the target illuminance value, the current area of ​​the area and the pre-built luminous flux calculation formula, wherein the luminous flux calculation formula is as follows: ; in, represents the compensation luminous flux, represents the target illumination value, represents the predicted value of the ambient illumination, represents the current illumination value, Indicates the area of ​​the current region, Indicates the preset efficiency factor.

[0046] It is understood that after confirming that the LED load is in the on state, the current illuminance value of the LED load is obtained. The current illuminance value is the illuminance of the LED load after it is turned on. The predicted ambient illuminance value is the estimated future light intensity calculated based on the ambient light change trend. The target illuminance value is the ideal illuminance standard required for a specific activity in a specific scene mode. The target illuminance value can be the combined effect of the current illuminance value and the predicted ambient illuminance value, or it can be the current illuminance value alone or the predicted ambient illuminance value alone.

[0047] It should be understood that the current area refers to the planar area of ​​the target area requiring lighting adjustment. For example, when working in an office, this area can be the area of ​​the workstation area. Optionally, the current area can be obtained using UWB / RFID positioning technology. The efficiency factor is a dimensionless parameter between 0 and 1 that quantifies the effective utilization rate of luminous flux in an actual lighting system. The compensation luminous flux refers to the additional luminous flux that the LED load needs to increase or decrease in order to bring the illuminance of the current area to a preset target illuminance value. Generally speaking, the compensation luminous flux can be positive or negative. When the compensation luminous flux is positive, it indicates that the current illuminance value provided by the LED load + the predicted ambient illuminance value cannot meet the illuminance requirement corresponding to the target illuminance value, and the LED load needs to increase the illuminance by a certain amount. The increased amount is the compensation illuminance value. Similarly, when the compensation luminous flux is negative, it indicates that the current illuminance value provided by the LED load + the predicted ambient illuminance value can meet the illuminance requirement corresponding to the target illuminance value, and energy savings can be achieved by reducing the LED illuminance. The embodiment of the present invention obtains the compensation luminous flux through the luminous flux calculation formula, so as to meet the illumination requirements and maximize energy saving, provide light on demand, and achieve dual optimization of comfort and energy efficiency.

[0048] S6. Based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller, perform a dimming operation on the LED load to obtain an adjusted LED load.

[0049] It should be explained that the dimming operation is performed on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain the adjusted LED load, including: generating an initial dimming parameter value by using the compensated luminous flux and a dimming parameter value generating unit corresponding to the second integrated controller; Obtaining an updated dimming parameter value based on the initial dimming parameter value and a pre-established verification method; When the monitoring time enters the transmission period of the sub-period, a modulation signal is obtained by using the updated dimming parameter value and the modulation unit corresponding to the second integrated controller, and a target switching ripple is obtained based on the modulation signal and the converter; The target switch ripple is transmitted to the third integrated controller by using the common DC bus, and the demodulated dimming parameter value is obtained by using the demodulation unit corresponding to the third integrated controller and the target switch ripple; When the monitoring time enters the dimming period of the sub-period, a dimming operation is performed on the LED load based on the driving unit corresponding to the third integrated controller and the demodulated dimming parameter value to obtain an adjusted LED load.

[0050] It is understood that the initial dimming parameter value is generally a parameter value related to the luminous flux compensation requirement, and the parameter value includes but is not limited to the brightness adjustment value, the current adjustment value, the PWM duty cycle, etc. The dimming operation refers to the control process of changing the output luminous flux of the LED load by adjusting the dimming parameter value so that the ambient illumination reaches the target illumination value. The dimming operation is implemented as follows: generating the initial dimming parameter value, obtaining the updated dimming parameter value, obtaining the modulation signal, obtaining the target switching ripple, and finally the demodulated dimming parameter value.

[0051] For example, assuming that the illumination of the LED load is adjusted by the current adjustment value, if the current adjustment value corresponding to the current illumination value of the LED load is 300mA, and the compensation luminous flux is 100lx, in order to increase the luminous flux of the LED load by 100lx, the dimming parameter value generation unit corresponding to the second integrated controller is used to generate an initial dimming parameter value of 50mA, indicating that the current adjustment value needs to be adjusted from 300mA to 350mA. Optionally, the process of obtaining the initial dimming parameter value using the second integrated controller is achievable by the existing technology and will not be described in detail here. The initial dimming parameter value is usually the dimming parameter value when the LED load is under standard or more suitable conditions, but in fact, environmental factors will cause the dimming parameter value of the LED load to deviate, among which temperature is a key environmental factor that needs to be considered. For example: an increase in temperature may cause the luminous efficiency of the LED load to decrease. In order to compensate for this deviation, the initial dimming parameter value is adjusted according to the actual temperature and temperature range of the temperature sensor.

[0052] In detail, the obtaining of the updated dimming parameter value based on the initial dimming parameter value and the pre-established inspection method includes: Using the temperature sensor to collect the current temperature, and determining whether the current temperature is within a preset temperature range; If the current temperature is within the temperature range, obtain the light efficiency attenuation rate corresponding to the current temperature; The dimming information update ratio is obtained based on the light efficiency decay rate and a pre-built calculation formula, wherein the calculation formula is as follows: ; in, Indicates the dimming information update ratio, represents the light efficiency decay rate; An updated dimming parameter value is obtained based on the dimming parameter value update ratio and the initial dimming parameter value.

[0053] It is understandable that the current temperature refers to the actual temperature of the LED load, and the temperature range is a temperature range set according to the data sheet of the LED load, which requires consideration of adjusting the initial dimming parameter value using a test method. If the current temperature is within the temperature range, the impact of temperature on the LED illumination needs to be considered. The implementation process is: obtaining the light efficiency decay rate corresponding to the current temperature. The light efficiency decay rate refers to the ratio of the luminous efficiency decay of the LED load due to temperature factors during use. It is usually used to quantify the degree of such efficiency reduction. For example, an increase in temperature will cause the luminous efficiency of the LED load to decrease. Under normal circumstances, for every 10°C increase in the actual temperature of the LED load, its luminous efficiency may decrease by 10% to 15%. Optionally, the light efficiency decay rate can be obtained from the data sheet of the LED load and will not be repeated here.

[0054] For example, assuming that the current temperature rise of the LED load causes the corresponding light efficiency attenuation rate to be 10%, it means that the temperature will cause the luminous efficiency of the LED load to attenuate. If the dimming operation is still performed with the initial dimming parameter value, the illumination requirement of the target illumination value cannot be met. In order to compensate for the attenuation caused by temperature, the calculation formula is used to obtain the dimming information update ratio of 1 / (1-10%). If the initial dimming parameter value is 50mA, the updated dimming parameter value can be obtained. .

[0055] It should be understood that the modulation signal is obtained by using the updated dimming parameter value and the modulation unit corresponding to the second integrated controller. The modulation signal is a specific signal format generated by the second integrated controller, and the signal format corresponds to the updated dimming parameter value. Optionally, if the updated dimming parameter value is 60mA, the modulation signal can be a PWM signal with a duty cycle of 20%, a PFM signal with a frequency of 20kHz, an AM signal with an amplitude of 1V, or a digital signal with a coding value of 20. After passing through the converter, the modulation signal will generate corresponding switching ripples, which are used to drive the LED load to achieve dimming operation. The target switching ripple refers to the voltage or current fluctuations generated after the modulation signal passes through the converter. Optionally, the acquisition process of the modulation signal and the target switching ripple can be realized by existing technologies and will not be repeated here. The demodulated dimming parameter value is the final dimming parameter extracted from the target switch ripple by the demodulation unit of the third integrated controller. For example, assuming the updated dimming parameter value is 60mA, the modulated signal obtained after modulation by the modulation unit is a PWM signal with a duty cycle of 20%. This PWM signal generates the target switch ripple after passing through the converter, and the target switch ripple characteristics correspond to the PWM signal with a duty cycle of 20%. The demodulation unit of the third integrated controller receives the target switch ripple and restores the demodulated dimming parameter value of 60mA through the demodulation unit. The demodulated dimming parameter value of 60mA will be used to drive the LED load to achieve dimming operation. Optionally, the process of obtaining the demodulated dimming parameter value is achievable by existing technologies and will not be repeated here. The embodiment of the present invention dynamically adjusts the initial dimming parameter value by compensating for luminous flux and considering the impact of ambient temperature on the actual luminous efficiency of the LED load, ensuring that the LED load can still achieve the target illumination value at different temperatures. This process uses a temperature sensor to monitor the actual temperature, combines it with the light efficiency decay rate to calculate and update the dimming parameter value, and then accurately controls the LED brightness through modulation, transmission, demodulation and other steps to achieve efficient and energy-saving intelligent dimming.

[0056] S7. Obtain the illuminance of the LED load after adjustment, obtain the illuminance after dimming, and after confirming that the illuminance after dimming and the target illuminance value meet the preset verification conditions, implement dimming control of the LED load.

[0057] It should be explained that the confirmation that the illuminance after dimming and the target illuminance value meet the preset verification conditions includes: The reference illumination error ratio is obtained based on the ambient illumination sequence and the pre-built illumination error ratio calculation formula, wherein the illumination error ratio calculation formula is as follows: ; in, represents the reference illumination error ratio, 、 and They represent the preset maximum value of the illumination error ratio, the preset median value of the illumination error ratio, and the preset minimum value of the illumination error ratio, respectively. represents the preset first illumination change rate, Indicates a preset second illumination change rate; Calculate the absolute difference between the illuminance after dimming and the target illuminance value to obtain the absolute illuminance difference; Obtaining an illumination error ratio based on the illumination absolute difference and the target illumination value, wherein the illumination error ratio is a ratio of the illumination absolute difference to the target illumination value; comparing the illumination error ratio with the reference illumination error ratio; If the illuminance error ratio is greater than the reference illuminance error ratio, a pre-built adjustment method is used to obtain the updated dimming illuminance and the updated dimming illuminance is used as the dimming illuminance. Return to the step of calculating the absolute difference between the dimming illuminance and the target illuminance value to obtain the absolute illuminance difference, until the illuminance error ratio is less than or equal to the reference illuminance error ratio, thereby realizing dimming control of the LED load.

[0058] It is understood that the post-dimming illuminance refers to the illuminance value actually output by the LED load after the dimming operation is completed, which is used to verify whether the dimming operation has reached the expected target illuminance value. The illuminance error ratio refers to the degree of error between the post-dimming illuminance and the target illuminance value, usually expressed as the ratio of the absolute difference between the two to the target illuminance value. The reference illuminance error ratio is a standard error ratio used to evaluate whether the deviation between the post-dimming illuminance and the target illuminance value is within an acceptable range. The reference illuminance error ratio is obtained based on the illuminance error ratio calculation formula. Generally speaking, the ambient illuminance sequence can reflect the trend and dynamic characteristics of the change in ambient illuminance value. By analyzing the ambient illuminance sequence, a reasonable error range can be set more accurately, thereby achieving more precise dimming control. Among them, the process of obtaining the reference illuminance error ratio is as follows: by calculating the rate of change of the ambient illuminance value in the ambient illuminance sequence, comparing the rate of change with the first illuminance change rate and the second illuminance change rate, if the rate of change is greater than the second illuminance change rate, it indicates that the current ambient illuminance value changes rapidly, which may cause the accuracy of the ambient illuminance prediction value obtained according to the ambient illuminance sequence to decrease, thereby directly affecting the accuracy of the adjusted dimming parameter value. At this time, the reference illuminance error ratio can be appropriately relaxed, and the maximum value of the illuminance error ratio is used as the reference illuminance error ratio. Otherwise, when the illuminance error ratio is subsequently compared with the reference illuminance error ratio, the verification condition cannot be met in a short period of time due to the large illuminance error ratio. When the rate of change is between the first illuminance change rate and the second illuminance change rate, it indicates that the rate of change is moderate, and the median of the illuminance error ratio is used as the reference illuminance error ratio. If the rate of change is less than the first illuminance change rate, it indicates that the current ambient illuminance value changes slowly, and the corresponding ambient illuminance prediction value has a high accuracy. The reference illuminance error ratio can be appropriately reduced, and the minimum value of the illuminance error ratio is used as the reference illuminance error ratio. The first illumination change rate refers to the smaller change rate of the ambient illumination value per unit time, and the second illumination change rate refers to the larger change rate of the ambient illumination value per unit time. The preset maximum illumination error ratio, the preset median illumination error ratio, and the preset minimum illumination error ratio respectively refer to the maximum error ratio, the medium error ratio, and the minimum error ratio allowed during the dimming process. The embodiment of the present invention dynamically adjusts the reference illumination error ratio through the ambient illumination sequence, relaxes the reference illumination error ratio when the ambient illumination value changes rapidly to avoid frequent adjustments, and tightens the reference illumination error ratio when the ambient illumination value changes slowly, thereby enhancing the adaptability and reliability of the dimming device and achieving efficient and intelligent dimming.

[0059] It should be understood that when the illuminance error ratio is greater than the reference illuminance error ratio, it indicates that the deviation between the illuminance after dimming and the target illuminance value exceeds the preset acceptable range, and the expected effect is not achieved. It is necessary to use a preset adjustment method for adjustment. The adjustment method includes but is not limited to increasing or decreasing the dimming parameter value, adjusting the increment of the dimming parameter value and increasing the dimming frequency. After adjustment using the adjustment method, the updated illuminance after dimming is obtained and the absolute difference between the illuminance after dimming and the target illuminance value is calculated to obtain the absolute difference in illuminance, until the illuminance error ratio is less than or equal to the reference illuminance error ratio, thereby realizing dimming control of the LED load.

[0060] The present invention is to solve the problem described in the background technology. The present invention obtains a dimming instruction and confirms a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode and a current activity mode, and obtains an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller and a third integrated controller, the second integrated controller includes: a dimming parameter value generation unit and a modulation unit, the third integrated controller includes: a demodulation unit and a drive unit, and the control period is divided into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period and a stabilization period. It can be seen that the present invention ensures that it can respond to changes in ambient illumination values ​​in a timely manner by dividing the control period into acquisition, analysis, transmission, dimming and stabilization periods, and maintains stable operation after dimming, thereby meeting the lighting needs in different scenes and activity modes and improving lighting quality and energy utilization efficiency. The monitoring time is acquired in real time. When the monitoring time enters the acquisition period, the ambient illumination sequence is acquired based on the ambient illumination sensor, wherein the ambient illumination sequence includes multiple ambient illumination values. When the monitoring time enters the analysis period, the ambient illumination prediction value is acquired based on the ambient illumination sequence. It can be seen that the present invention ensures high-density sampling when the ambient illumination value changes suddenly by adaptively adjusting the acquisition frequency, and performs low-density sampling when the ambient illumination value is stable, thereby avoiding the loss of key ambient illumination values ​​during sudden changes and excessive acquisition during stability to cause waste of resources, thereby improving the adaptability of the LED dimming device, and using the ambient illumination prediction value calculation formula to calculate the relative change rate of adjacent illumination values, accurately reflecting the real-time change trend of the ambient illumination, and comprehensively considering the time intervals of the three stages of analysis, transmission, and dimming to make the ambient illumination prediction value more in line with reality, thereby improving the accuracy of the prediction. Obtain a target illuminance value, and confirm the operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state. After confirming that the operating state of the LED load is an on state, obtain the current illuminance value of the LED load, and obtain the compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value. It can be seen that the present invention obtains the target illuminance value by referring to the illuminance information library and compares it with the predicted ambient illuminance value, so as to realize turning on the LED only when the light is insufficient, realizing precise on-demand lighting, avoiding energy waste, reducing manual intervention, and significantly improving lighting quality and energy efficiency. The compensation luminous flux is obtained by the luminous flux calculation formula, so as to realize both meeting the illumination requirements and maximizing energy saving, supplying light on demand, and achieving dual optimization of comfort and energy efficiency.Based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller, dimming the LED load to obtain an adjusted LED load. This demonstrates that the present invention dynamically adjusts the initial dimming parameter values ​​by compensating for the luminous flux and taking into account the impact of ambient temperature on the actual luminous efficiency of the LED load, ensuring that the LED load can still achieve the target illuminance value at different temperatures. This process utilizes a temperature sensor to monitor the actual temperature, calculates and updates the dimming parameter values ​​based on the luminous efficiency decay rate, and then precisely controls the LED brightness through modulation, transmission, and demodulation, achieving efficient and energy-saving intelligent dimming. The illuminance of the adjusted LED load is obtained to obtain the post-dimming illuminance. After confirming that the post-dimming illuminance and the target illuminance value meet preset verification conditions, dimming control of the LED load is implemented. This demonstrates that the present invention dynamically adjusts the reference illuminance error ratio through the ambient illuminance sequence. When the ambient illuminance value changes rapidly, the reference illuminance error ratio is relaxed to avoid frequent adjustments, while when the ambient illuminance value changes slowly, the reference illuminance error ratio is tightened, enhancing the adaptability and reliability of the dimming device and achieving efficient and intelligent dimming. Therefore, the present invention can improve the flexibility and adaptability of LED dimming control.

[0061] like Figure 2 FIG. 1 is a functional module diagram of an LED dimming system provided by an embodiment of the present invention.

[0062] The LED dimming system 100 described in the present invention can be installed in an electronic device. Depending on the functionality implemented, the LED dimming system 100 may include a dimming device acquisition module 101, a dimming acquisition module 102, a dimming parameter transmission module 103, and a post-dimming evaluation module 104. A module, also referred to as a unit, is a series of computer program segments that can be executed by an electronic device processor and perform a fixed function. These modules are stored in the electronic device's memory.

[0063] The dimming device acquisition module 101 is used to obtain a dimming instruction and determine a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode; Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes a demodulation unit and a driving unit; The dimming acquisition module 102 is configured to divide the control period into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of a collection period, an analysis period, a transmission period, a dimming period, and a stabilization period; Perform the following operations on each of one or more sub-periods: Acquire monitoring time in real time, and when the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes a plurality of ambient illumination values, and when the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence; The dimming parameter transmission module 103 is used to obtain a target illuminance value, confirm the operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state, and after confirming that the operating state of the LED load is the on state, obtain the current illuminance value of the LED load, and obtain the compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value; performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load; The post-dimming evaluation module 104 is configured to obtain the illuminance of the LED load after adjustment, obtain the post-dimming illuminance, and implement dimming control of the LED load after confirming that the post-dimming illuminance and the target illuminance value meet a preset verification condition.

[0064] In detail, each module in the LED dimming system 100 of the embodiment of the present invention adopts the same method as above when in use. Figure 1 The LED dimming method described in the preceding claims has the same technical means and can produce the same technical effects, so I will not go into details here.

[0065] like Figure 3 FIG. 1 is a schematic diagram of the structure of an electronic device for implementing an LED dimming method provided by an embodiment of the present invention.

[0066] The electronic device 1 may include a processor 10 , a memory 11 , and a bus 12 , and may further include a computer program stored in the memory 11 and executable on the processor 10 , such as an LED dimming method program.

[0067] The memory 11 includes at least one type of readable storage medium, including flash memory, a removable hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the memory 11 may be an internal storage unit of the electronic device 1, such as a removable hard disk of the electronic device 1. In other embodiments, the memory 11 may also be an external storage device of the electronic device 1, such as a plug-in removable hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. equipped on the electronic device 1. Furthermore, the memory 11 includes both the internal storage unit of the electronic device 1 and an external storage device. The memory 11 can be used not only to store application software installed in the electronic device 1 and various types of data, such as the code of an LED dimming method program, but also to temporarily store data that has been output or is about to be output.

[0068] In some embodiments, the processor 10 may be comprised of an integrated circuit, such as a single packaged integrated circuit or a combination of multiple packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control core (control unit) of the electronic device, connecting the various components of the electronic device using various interfaces and circuits. It executes programs or modules (such as an LED dimming method program) stored in the memory 11 and accesses data stored in the memory 11 to perform various functions and process data.

[0069] The bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus 12 may be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to enable communication between the memory 11 and at least one processor 10, etc.

[0070] Figure 3 Only the electronic device with components is shown, and it can be understood by those skilled in the art that Figure 3The structure shown does not constitute a limitation on the electronic device 1 , and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0071] For example, although not shown, the electronic device 1 may further include a power supply (e.g., a battery) to power various components. Preferably, the power supply may be logically connected to the at least one processor 10 via a power management device, thereby enabling functions such as charge management, discharge management, and power consumption management via the power management device. The power supply may further include any components such as one or more DC or AC power supplies, a recharging device, a power failure detection circuit, a power converter or inverter, and a power status indicator. The electronic device 1 may also include various sensors, Bluetooth modules, Wi-Fi modules, etc., which are not further described here.

[0072] Furthermore, the electronic device 1 may also include a network interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

[0073] Optionally, the electronic device 1 may further include a user interface, which may be a display or an input unit (such as a keyboard). Optionally, the user interface may also be a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. The display may also be appropriately referred to as a display screen or a display unit, and is used to display information processed by the electronic device 1 and to display a visual user interface.

[0074] The LED dimming method program stored in the memory 11 of the electronic device 1 is a combination of multiple instructions. When executed in the processor 10, it can achieve the following: Obtaining a dimming instruction, and determining a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode; Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes a demodulation unit and a driving unit; Dividing the control period into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period, and a stabilization period; Perform the following operations on each of one or more sub-periods: Acquire monitoring time in real time, and when the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes a plurality of ambient illumination values, and when the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence; Obtaining a target illuminance value, confirming an operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state, and after confirming that the operating state of the LED load is the on state, obtaining a current illuminance value of the LED load, and obtaining a compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value; performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load; The illuminance of the LED load after adjustment is obtained, and the illuminance after dimming is obtained. After confirming that the illuminance after dimming and the target illuminance value meet the preset verification conditions, the dimming control of the LED load is realized.

[0075] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to Figures 1 to 3 The description of the relevant steps in the corresponding embodiments will not be repeated here.

[0076] Furthermore, if the modules / units integrated into the electronic device 1 are implemented as software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. The computer-readable storage medium may be volatile or non-volatile. For example, the computer-readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0077] The present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program. When the computer program is executed by a processor of an electronic device, the computer program can implement: Obtaining a dimming instruction, and determining a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode; Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes a demodulation unit and a driving unit; Dividing the control period into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period, and a stabilization period; Perform the following operations on each of one or more sub-periods: Acquire monitoring time in real time, and when the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes a plurality of ambient illumination values, and when the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence; Obtaining a target illuminance value, confirming an operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state, and after confirming that the operating state of the LED load is the on state, obtaining a current illuminance value of the LED load, and obtaining a compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value; performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load; The illuminance of the LED load after adjustment is obtained, and the illuminance after dimming is obtained. After confirming that the illuminance after dimming and the target illuminance value meet the preset verification conditions, the dimming control of the LED load is realized.

[0078] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, systems and methods can be implemented in other ways. For example, the system embodiments described above are only exemplary, and actual implementations may have other division methods.

[0079] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of the modules may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

[0080] In addition, the functional modules in various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or hardware plus software functional modules.

[0081] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A LED dimming method, characterized in that: include: Obtaining a dimming instruction, and determining a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode; Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes a demodulation unit and a driving unit; Dividing the control period into one or more sub-periods based on the current scene mode and the current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period, and a stabilization period; Perform the following operations on each of one or more sub-periods: Acquire monitoring time in real time, and when the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes a plurality of ambient illumination values, and when the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence; Obtaining a target illuminance value, confirming an operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is an on state or an off state, and after confirming that the operating state of the LED load is the on state, obtaining a current illuminance value of the LED load, and obtaining a compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value; performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load; The illuminance of the LED load after adjustment is obtained, and the illuminance after dimming is obtained. After confirming that the illuminance after dimming and the target illuminance value meet the preset verification conditions, the dimming control of the LED load is realized.

2. The LED dimming method according to claim 1, wherein: The acquiring of an ambient illumination sequence based on the ambient illumination sensor includes: Dividing the collection period into a plurality of collection sub-periods using a preset method, wherein each collection sub-period includes a collection period and a post-collection period; Sorting the multiple acquisition sub-periods in order from front to back according to the time corresponding to the acquisition sub-periods to obtain an acquisition sub-period sequence; Sequentially extracting analysis acquisition sub-periods from the acquisition sub-period sequence, and identifying reference acquisition sub-periods in the acquisition sub-period sequence based on the analysis acquisition sub-periods, wherein the reference acquisition sub-period is adjacent to and lags behind the analysis acquisition sub-period in the acquisition sub-period sequence; When the monitoring time enters the collection period corresponding to the analysis and collection sub-period, the ambient illumination subset corresponding to the analysis and collection sub-period is obtained based on the preset basic collection times and the ambient illumination sensor, wherein the ambient illumination subset includes multiple ambient illumination values; When the monitoring time enters the post-collection period corresponding to the analysis and collection sub-period, the plurality of ambient illumination values ​​in the ambient illumination subset are sorted in order from front to back according to the time corresponding to the ambient illumination value to obtain a first ambient illumination value sequence; A first node set is obtained based on the first ambient illumination value sequence, wherein the first node set includes a plurality of first nodes, and the first node set is expressed as: ; in, represents the collection node set, 、 、 、 、 、 、 and Respectively represent the first, second, third, fourth, and , , The and the ambient illumination values, 、 、 、 and Respectively represent the first, second, third, and A First node; The following operations are performed on each first node in the first node set: Calculate the absolute difference between the two ambient illumination values ​​at the first node to obtain the absolute illumination difference; Summarizing the absolute illumination differences to obtain an absolute illumination difference set; The following operations are performed on each absolute illumination difference value in the absolute illumination difference value set: Comparing the absolute illumination difference with a preset absolute illumination threshold; If the absolute illumination difference is greater than the absolute illumination threshold, the absolute illumination difference is used as a fast absolute illumination difference; Summarizing the fast absolute illumination difference values ​​to obtain a fast absolute illumination difference value set; Counting the number of fast absolute illumination differences in the fast absolute illumination difference set and the number of first nodes in the first node set respectively to obtain the number of fast changes and the number of first nodes; Calculating the ratio of the number of rapid changes to the number of first nodes to obtain a rapid change ratio; Calculate the mean of all absolute illumination differences in the absolute illumination difference set to obtain the mean absolute illumination difference; Obtaining the second acquisition times using the rapid change ratio and the average of the absolute illumination difference; When the monitoring time enters the collection period corresponding to the reference collection sub-period, acquiring the ambient illumination subset corresponding to the reference collection sub-period based on the second collection number and the ambient illumination sensor; After confirming that the corresponding ambient illumination subset is obtained for each acquisition sub-period in the acquisition sub-period sequence, the ambient illumination subsets are aggregated to obtain an ambient illumination set; The multiple ambient illumination values ​​are sorted in order from front to back according to the time corresponding to the ambient illumination values ​​in the ambient illumination set to obtain an ambient illumination sequence.

3. The LED dimming method according to claim 2, wherein: The method of obtaining the second acquisition number by using the rapid change ratio and the average value of the absolute illumination difference includes: The second acquisition times acquisition scheme is constructed using the rapid change ratio and the average value of the absolute illumination difference. The second acquisition times acquisition scheme is as follows: ; in, represents the rapid change ratio, Indicates the preset change ratio threshold, Indicates the total absolute illumination difference The absolute illuminance difference, represents the mean value of the absolute illumination difference, Indicates the preset absolute illumination change threshold, Indicates the basic collection times, represents the second acquisition times, and Both represent preset adjustment coefficients. Indicates rounding down; A second acquisition number is acquired based on a second acquisition number acquisition scheme.

4. The LED dimming method according to claim 3, wherein: The obtaining of the predicted ambient illumination value based on the ambient illumination sequence includes: Respectively obtain the time intervals corresponding to the analysis period, the transmission period, and the dimming period to obtain the analysis time interval, the transmission time interval, and the dimming time interval; The ambient illumination prediction value is obtained based on the ambient illumination sequence, the analysis time interval, the transmission time interval, the dimming time interval, and the pre-built ambient illumination prediction value calculation formula, wherein the ambient illumination prediction value calculation formula is as follows: ； in, represents the predicted value of the ambient illumination, Indicates that there are a total of Ambient illumination value, 、 and Respectively represent the first , A Ambient illumination value, represents the analysis time interval, represents the transmission time interval, Indicates the dimming time interval.

5. The LED dimming method according to claim 4, wherein: The acquiring of the target illumination value and confirming the operating state of the LED load based on the target illumination value, the predicted ambient illumination value and the first integrated controller include: Using the current scene mode, a plurality of reference illumination nodes are identified in a pre-built reference illumination information library, wherein the scene mode corresponding to each of the plurality of reference illumination nodes is the current scene mode, and each reference illumination node includes a reference illumination value and a reference activity mode; Using the current activity mode, a current illumination node is identified from a plurality of reference illumination nodes, wherein the reference activity mode corresponding to the current illumination node is the current activity mode; Extracting a reference illuminance value from the current illuminance node, and taking the reference illuminance value as the target illuminance value; Compare the target illuminance value with the predicted ambient illuminance value; If the target illuminance value is less than the predicted value of the ambient illuminance, the operating state of the LED load is set to the off state by using the first integrated controller; otherwise, the operating state of the LED load is set to the on state.

6. The LED dimming method according to claim 5, wherein: The obtaining of the compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value and the target illuminance value includes: The area of ​​the current scene is obtained by using a preset measurement technology to obtain the current area of ​​the area, and the compensation luminous flux is obtained based on the current illuminance value, the ambient illuminance prediction value, the target illuminance value, the current area of ​​the area and the pre-built luminous flux calculation formula.

7. The LED dimming method according to claim 6, wherein: The method of performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load includes: generating an initial dimming parameter value by using the compensated luminous flux and a dimming parameter value generating unit corresponding to the second integrated controller; Obtaining an updated dimming parameter value based on the initial dimming parameter value and a pre-established verification method; When the monitoring time enters the transmission period of the sub-period, a modulation signal is obtained by using the updated dimming parameter value and the modulation unit corresponding to the second integrated controller, and a target switching ripple is obtained based on the modulation signal and the converter; The target switch ripple is transmitted to the third integrated controller by using the common DC bus, and the demodulated dimming parameter value is obtained by using the demodulation unit corresponding to the third integrated controller and the target switch ripple; When the monitoring time enters the dimming period of the sub-period, a dimming operation is performed on the LED load based on the driving unit corresponding to the third integrated controller and the demodulated dimming parameter value to obtain an adjusted LED load.

8. The LED dimming method according to claim 7, wherein: The obtaining of an updated dimming parameter value based on the initial dimming parameter value and a pre-established inspection method includes: Using the temperature sensor to collect the current temperature, and determining whether the current temperature is within a preset temperature range; If the current temperature is within the temperature range, obtain the light efficiency attenuation rate corresponding to the current temperature; Obtain the dimming information update ratio based on the light efficiency decay rate and the pre-built calculation formula; An updated dimming parameter value is obtained based on the dimming parameter value update ratio and the initial dimming parameter value.

9. The LED dimming method according to claim 8, wherein: After confirming that the dimming illuminance and the target illuminance value meet the preset verification conditions, the method includes: Obtain the reference illumination error ratio based on the ambient illumination sequence and the pre-built illumination error ratio calculation formula; Calculate the absolute difference between the illuminance after dimming and the target illuminance value to obtain the absolute illuminance difference; Obtaining an illumination error ratio based on the illumination absolute difference and the target illumination value, wherein the illumination error ratio is a ratio of the illumination absolute difference to the target illumination value; comparing the illumination error ratio with the reference illumination error ratio; If the illuminance error ratio is greater than the reference illuminance error ratio, a pre-built adjustment method is used to obtain the updated dimming illuminance and the updated dimming illuminance is used as the dimming illuminance. Return to the step of calculating the absolute difference between the dimming illuminance and the target illuminance value to obtain the absolute illuminance difference, until the illuminance error ratio is less than or equal to the reference illuminance error ratio, thereby realizing dimming control of the LED load.

10. An LED dimming system, characterized in that: The system comprises: A dimming device acquisition module is used to obtain a dimming instruction and determine a dimming node based on the dimming instruction, wherein the dimming node includes: a control period, a current scene mode, and a current activity mode; Obtain an LED dimming device, wherein the LED dimming device includes an ambient illumination sensor, a temperature sensor, a converter, an LED load, a common DC bus, a first integrated controller, a second integrated controller, and a third integrated controller, wherein the second integrated controller includes a dimming parameter value generation unit and a modulation unit, and the third integrated controller includes a demodulation unit and a driving unit; a dimming acquisition module, configured to divide the control period into one or more sub-periods based on a current scene mode and a current activity mode, wherein each sub-period consists of an acquisition period, an analysis period, a transmission period, a dimming period, and a stabilization period; Perform the following operations on each of one or more sub-periods: Acquire monitoring time in real time, and when the monitoring time enters the acquisition period, acquire an ambient illumination sequence based on the ambient illumination sensor, wherein the ambient illumination sequence includes a plurality of ambient illumination values, and when the monitoring time enters the analysis period, acquire an ambient illumination prediction value based on the ambient illumination sequence; a dimming parameter transmission module, configured to obtain a target illuminance value, confirm an operating state of the LED load based on the target illuminance value, the predicted ambient illuminance value, and the first integrated controller, wherein the operating state is either an on state or an off state; after confirming that the operating state of the LED load is the on state, obtain a current illuminance value of the LED load; and obtain a compensation luminous flux based on the current illuminance value, the predicted ambient illuminance value, and the target illuminance value; performing a dimming operation on the LED load based on the compensated luminous flux, the second integrated controller, the converter, and the third integrated controller to obtain an adjusted LED load; The post-dimming evaluation module is used to obtain the illuminance of the LED load after adjustment, obtain the post-dimming illuminance, and implement dimming control of the LED load after confirming that the post-dimming illuminance and the target illuminance value meet the preset verification conditions.

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