A brightness adjustment method for D-LED lamp beads

Abstract

The present application relates to the field of dimming technology, and in particular to a brightness adjustment method for D-LED lamp beads. The method includes: obtaining the real factor of the ambient light intensity of the light-emitting device at the historical moment; obtaining the historical prediction value of the historical ambient light intensity at the historical moment, and determining the prediction error value at the current moment according to the historical prediction value and the real factor at the corresponding historical moment; using the sum of the ambient light intensity at the current moment and the prediction error value as the target prediction value of the ambient light intensity at the next moment; determining the target luminous brightness according to the target prediction value and the preset corresponding relationship, so as to control the luminescence of the D-LED lamp beads in the light-emitting device at the next moment according to the target luminous brightness. Through the above technical scheme, the luminous brightness of the D-LED light beads in the light-emitting device can be made to better match the ambient light intensity.

Description

Technical Field

[0001] The present application relates to the field of dimming technology, and in particular to a brightness adjustment method for D-LED lamp beads. Background Art

[0002] D-LED refers to direct-plug LED (Light Emitting Diode), which can be used as a power indicator light, status indicator light, and dashboard backlight of a vehicle. It can also be used in billboards to display the required advertising information, or in road traffic lights to indicate traffic signals, or in turn signals and brake lights.

[0003] The brightness of LED lamp beads can be adjusted to meet the user's demand for the luminous brightness of devices equipped with LED lamp beads. In related technologies, for example, a Chinese patent application document with publication number CN117479373A provides a method for adjusting the brightness of light-emitting diodes, including: obtaining ambient light change data of a target light-emitting diode according to a monitoring time period, and performing spectrum mapping and feature analysis on the ambient light change data to obtain ambient light change characteristics; according to the ambient light change characteristics, optimizing the initial brightness adjustment execution strategy to obtain a target brightness adjustment execution strategy, and generating a pulse width modulation signal control mechanism for the target light-emitting diode according to the target brightness adjustment execution strategy.

[0004] In the related art, the brightness of the light-emitting diode can be adjusted according to the characteristics of the ambient light change. For example, for the LED lights installed on the billboard, when the ambient light brightness is lower, the advertising content is displayed at a lower brightness to save energy, and when the ambient light brightness is higher, such as on a sunny day, the brightness of the LED is increased so that the information displayed on the billboard can always be convenient for users to view. However, when the brightness of the LED lamp beads is adjusted directly according to the ambient light brightness, there is a certain response time for the brightness adjustment of the LED lamp beads, which makes it difficult for the LED lamp beads to accurately adapt to the changes in ambient light. Summary of the invention

[0005] In order to overcome the problem in the related art that LED lamp beads are difficult to accurately adapt to changes in ambient light, the present application provides a brightness adjustment method for D-LED lamp beads, including: obtaining a real factor of the ambient light intensity of a light-emitting device at a historical moment, the real factor being used to characterize the degree of matching between the historical ambient light intensity and the historical luminous brightness of the light-emitting device at the historical moment; obtaining a historical prediction value of the historical ambient light intensity at the historical moment, and determining a prediction error value at the current moment based on the historical prediction value and the real factor corresponding to the historical moment; using the sum of the ambient light intensity at the current moment and the prediction error value as the target prediction value of the ambient light intensity at the next moment; determining the target luminous brightness based on the target prediction value and a preset corresponding relationship, so as to control the luminescence of the D-LED lamp beads in the light-emitting device at the next moment according to the target luminous brightness, the preset corresponding relationship being used to characterize the corresponding relationship between the ambient light intensity and the luminous brightness; wherein the prediction error value , is the number of historical moments before the current moment, is the preset first positive value, is the predicted value of the historical ambient light intensity at the nth historical moment, is the actual value of the historical ambient light intensity at the nth historical moment; It is the ratio of the real factor of the ambient light intensity at the nth historical moment to the target time interval; the target time interval is the time interval between the historical moment and the current moment.

[0006] In this way, the sum of the ambient light intensity at the current moment and the prediction error value is used as the target prediction value of the ambient light intensity at the next moment; and the target luminous brightness is determined based on the target prediction value and the preset corresponding relationship, so as to control the luminescence of the D-LED lamp beads in the light-emitting device at the next moment according to the target luminous brightness; compared with directly adjusting the brightness of the D-LED lamp beads according to the ambient light brightness at the current moment, since the target luminous brightness is determined based on the target prediction value of the ambient light intensity, the brightness of the D-LED lamp beads can better adapt to changes in the ambient light intensity, so that the luminous brightness of the D-LED lamp beads better matches the ambient light intensity.

[0007] At the same time, since the prediction error value at the current moment is determined based on the historical prediction value at the corresponding historical moment and the true factor, the true factor is used to characterize the degree of matching between the historical ambient light intensity and the historical luminous brightness of the light-emitting device at the historical moment, a more accurate prediction error value can be obtained at the current moment, thereby more accurately obtaining the predicted amount of ambient light intensity at the next moment. Therefore, the D-LED lamp beads can better adapt to changes in ambient light intensity.

[0008] Optionally, the real factor of the ambient light intensity at the historical moment is obtained in the following manner: taking the ranking of the target ambient light intensity among multiple historical ambient light intensities in the time period of the historical moment as the first ranking information; the target ambient light intensity is the ambient light intensity of the light-emitting device at the historical moment; taking the ranking of the luminous brightness of the light-emitting device at the historical moment among multiple historical luminous brightnesses in the time period of the historical moment as the second ranking information, and determining the difference information between the first ranking information and the second ranking information; obtaining the fluctuation degree value of the ambient light intensity of the light-emitting device at the historical moment, and determining the real factor of the ambient light intensity of the light-emitting device at the historical moment based on the difference information and the fluctuation degree value.

[0009] Optionally, determining difference information between the first ranking information and the second ranking information includes: , where L is the difference between the first ranking information and the second ranking information, For the first ranking information, is the second ranking information, a is the preset second positive value, To take the absolute value operation.

[0010] Optionally, the fluctuation degree of the ambient light intensity at a historical moment is determined by: ,in, is the fluctuation value of the ambient light intensity of the luminous device at the historical moment, T is the number of historical ambient light intensities corresponding to the time period of the historical moment, G is the ambient light intensity of the luminous device at the historical moment, is the ambient light intensity of the tth other historical moment in the time period of the light-emitting device at the historical moment, a is a preset second positive value, P is the standard deviation of the ambient light intensity of the light-emitting device in the time period of the historical moment, O is the average value of the ambient light intensity of the light-emitting device in the time period of the historical moment, To take the absolute value operation.

[0011] In this way, by comparing the ambient light intensity of the light-emitting device at the historical moment with other ambient light intensities in the time period of the historical moment, since the other ambient light intensities being compared are in the same time period as the historical moment, the fluctuation degree value of the ambient light intensity of the light-emitting device at the historical moment can be better determined, and the fluctuation degree value can better characterize the fluctuation degree of the ambient light intensity of the light-emitting device at the historical moment.

[0012] Optionally, determining a real factor of the ambient light intensity of the light emitting device at a historical moment according to the difference information and the fluctuation degree value includes: , where E is the real factor of the ambient light intensity of the luminous device at the historical moment, L is the difference information between the first ranking information and the second ranking information, Y is the fluctuation value of the ambient light intensity of the luminous device at the historical moment, exp is an exponential function with a natural constant as the base; R is the correlation coefficient between the ambient light intensity and the luminous brightness of the luminous device in the time period of the historical moment, To take the absolute value operation.

[0013] In this way, by processing the correlation coefficient with an exponential function, it is possible to keep the change direction of the correlation coefficient consistent with that of the real factor, and to normalize the value of the correlation coefficient to a value greater than 0 and less than 1, making it easier for the correlation coefficient to participate in the calculation process of the real factor.

[0014] Optionally, the correlation coefficient between the ambient light intensity and the luminous brightness of the light-emitting device in the time period where the historical moment is located is obtained in the following manner: obtaining an ambient light intensity data set consisting of multiple ambient light intensities of the light-emitting device in the time period where the historical moment is located; obtaining a luminous brightness data set consisting of multiple luminous brightnesses of the light-emitting device in the time period where the historical moment is located; and using the Pearson correlation coefficient between the ambient light intensity data set and the luminous brightness data set as the correlation coefficient between the ambient light intensity and the luminous brightness of the light-emitting device in the time period where the historical moment is located.

[0015] In this way, since the luminous brightness of the luminous device in the embodiment of the present application is positively correlated with the ambient light brightness, if the Pearson correlation coefficient determined by the ambient light intensity data set and the luminous brightness data set is 0, it means that there is no relationship between the ambient light intensity and the luminous brightness in a historical time period, and there is a high probability that noise data exists in the ambient light intensity data set and the luminous brightness data set. Alternatively, if the Pearson correlation coefficient determined by the ambient light intensity data set and the luminous brightness data set is a negative number, it means that there is a negative correlation between the ambient light intensity and the luminous brightness in a historical time period, and there is a high probability that noise data exists in the ambient light intensity data set and the luminous brightness data set. By determining the Pearson correlation coefficient between the ambient light intensity data set and the luminous brightness data set in the time period of the historical moment, it can help to determine a more accurate real factor.

[0016] Optionally, controlling the light emission of the D-LED lamp beads in the light-emitting device at the next moment according to the target light brightness includes: determining the number of D-LED lamp beads required to emit light in the light-emitting device and the light emission intensity of the lamp beads according to the target light brightness; controlling the light emission of the D-LED lamp beads in the light-emitting device according to the number of D-LED lamp beads required to emit light in the light-emitting device and the light emission intensity of the lamp beads.

[0017] In this way, by controlling the light emission of the D-LED lamp beads in the light emitting device according to the number of D-LED lamp beads required to emit light and the light emission intensity of the lamp beads, the light emission of the D-LED lamp beads in the light emitting device can be flexibly controlled.

[0018] Optionally, the method also includes: obtaining the cumulative lighting time of the D-LED lamp beads in the light-emitting device after the first power-on, and obtaining the luminous intensity of the D-LED lamp beads required for lighting; determining the power compensation amount of the D-LED lamp beads based on the cumulative lighting time and the luminous intensity of the lamp beads to obtain the power of the D-LED lamp beads when lighting.

[0019] In this way, the power compensation amount of the D-LED lamp bead is determined according to the cumulative lighting time and the luminous intensity of the lamp bead to obtain the power of the D-LED lamp bead when it is emitting light. This can avoid the limitation of the actual brightness of the D-LED lamp bead due to the light decay phenomenon of the D-LED lamp bead, and ensure that the D-LED lamp bead can output the actual luminous brightness consistent with the expected brightness.

[0020] The technical solution provided by the embodiments of the present application may include the following beneficial effects: taking the sum of the ambient light intensity at the current moment and the prediction error value as the target prediction value of the ambient light intensity at the next moment; and determining the target luminous brightness based on the target prediction value and the preset corresponding relationship, so as to control the light emission of the D-LED lamp beads in the light-emitting device at the next moment according to the target luminous brightness; compared with directly adjusting the brightness of the D-LED lamp beads according to the ambient light brightness at the current moment, since the target luminous brightness is determined based on the target prediction value of the ambient light intensity, the brightness of the D-LED light beads can better adapt to changes in the ambient light intensity, so that the luminous brightness of the D-LED light beads better matches the ambient light intensity.

[0021] At the same time, since the prediction error value at the current moment is determined based on the historical prediction value at the corresponding historical moment and the true factor, the true factor is used to characterize the degree of matching between the historical ambient light intensity and the historical luminous brightness of the light-emitting device at the historical moment, a more accurate prediction error value can be obtained at the current moment, thereby more accurately obtaining the predicted amount of ambient light intensity at the next moment. Therefore, the D-LED lamp beads can better adapt to changes in ambient light intensity.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 The figure is a flow chart of a method for adjusting the brightness of a D-LED lamp bead according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Here, exemplary embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0026] First, the application scenarios of the embodiments of the present application are briefly introduced. In the application scenarios of the present application, the luminous intensity of the light-emitting device equipped with D-LED lamp beads can be adjusted according to the ambient light intensity of the light-emitting device equipped with D-LED lamp beads; for example, for the LED lights installed on the billboard, the advertising content can be displayed at a lower brightness when the ambient light brightness is lower to save energy, and the brightness of the LED can be increased when the ambient light brightness is higher on sunny days, so that the information displayed on the billboard can always be convenient for users to view.

[0027] However, when the brightness of the LED lamp beads is adjusted directly according to the ambient light brightness, there is a certain response time for the brightness adjustment of the LED lamp beads, which makes the luminous brightness used by the LED lamp beads have a certain lag relative to the ambient light intensity. The LED lamp beads are difficult to adapt to changes in ambient light, affecting the user's viewing of the information indicated by the LED lamp beads.

[0028] For example, when the ambient light intensity becomes higher, since the luminous brightness used by the LED indicator light has a certain lag relative to the ambient light intensity, the luminous brightness used by the LED indicator light at the current moment is relative to the lower ambient light intensity at the previous moment, and the user may ignore the information indicated by the LED index light at the current moment.

[0029] For another example, when the ambient light intensity becomes higher, since the luminous brightness used by the LED indicator light has a certain lag relative to the ambient light intensity, the luminous brightness used by the LED indicator light at the current moment is relative to the higher ambient light intensity at the previous moment. The luminous brightness of the LED indicator light that adapts to the higher ambient light brightness is higher than the ambient light brightness at the current moment, which may cause irritation to the user's eyes.

[0030] In view of the above technical problems, the present application provides a brightness adjustment method for a D-LED lamp bead. Figure 1 is a flow chart of a method for adjusting the brightness of a D-LED lamp bead according to an exemplary embodiment. Figure 1 As shown, the method includes the following steps.

[0031] In step S101 , the real factor of the ambient light intensity of the lighting device at a historical moment is obtained.

[0032] The real factor is used to characterize the matching degree between the historical ambient light intensity and the historical luminous brightness of the light-emitting device at the historical moment. The real factor is determined according to the historical ambient light intensity and the historical luminous brightness of the light-emitting device.

[0033] The larger the value of the true factor is, the higher the degree of match between the ambient light intensity at the historical moment and the luminous intensity is, and the ambient light intensity at the corresponding historical moment has a lower probability of being data caused by noise. The ambient light intensity at the historical moment has a higher reference value for the prediction of the ambient light intensity at the current moment, or the predicted value of the ambient light intensity at the historical moment has a higher reference value for the prediction of the ambient light intensity at the current moment.

[0034] On the contrary, the smaller the value of the true factor is, the lower the match between the ambient light intensity at the historical moment and the luminous intensity is, and the ambient light intensity at the corresponding historical moment has a higher probability of being data caused by noise. The ambient light intensity at the historical moment has a lower reference value for the prediction of the ambient light intensity at the current moment, or the predicted value of the ambient light intensity at the historical moment has a lower reference value for the prediction of the ambient light intensity at the current moment.

[0035] The light-emitting device in the embodiments of the present application may refer to a device that emits light through LED lamp beads to display the information to be displayed. For example, the light-emitting device may be a vehicle instrument backlight, an LED display screen, an LED outdoor frame advertisement, a traffic light or other device. Alternatively, the light-emitting device may be a background light used to provide background brightness for outdoor advertisements. The ambient light intensity of the light-emitting device refers to the light intensity of the environment in which the light-emitting device is located.

[0036] The light emitting brightness of the light emitting device in the embodiment of the present application may be positively correlated with the ambient light intensity. For example, on a sunny day with high ambient light intensity, the light emitting device may emit light with a higher brightness so that the user can more easily notice the light emitting device, or the user may more easily view the information indicated by the light emitting device.

[0037] At night when the ambient light intensity is low, the light-emitting device can emit light at a lower brightness, which can effectively display the displayed information, reduce the power consumption required for the light-emitting device to work, and avoid possible irritation or damage to the user's eyes caused by strong light.

[0038] The ambient light intensity of a light-emitting device refers to the light intensity of the environment in which the light-emitting device is located. By setting a light intensity sensor in the environment in which the light-emitting device is located, or setting a light intensity sensor on the non-light-emitting surface of the light-emitting device, the light intensity of the environment in which the light-emitting device is located can be measured.

[0039] In another embodiment, the real factor of the ambient light intensity at the historical moment is also obtained in the following manner: the ranking of the target ambient light intensity among multiple historical ambient light intensities in the time period where the historical moment is located is used as the first ranking information; the target ambient light intensity is the ambient light intensity of the light-emitting device at the historical moment; the ranking of the luminous brightness of the light-emitting device at the historical moment among multiple historical luminous brightnesses in the time period where the historical moment is located is used as the second ranking information, and the difference information between the first ranking information and the second ranking information is determined; the inverse of the difference information is used as the real factor of the ambient light intensity of the light-emitting device at the historical moment.

[0040] Since the light-emitting device of the embodiment of the present application will increase the luminous brightness as the ambient light intensity increases, or the light-emitting device will reduce the luminous brightness as the ambient light intensity decreases, therefore, when there is no abnormality in the ambient light intensity or the luminous brightness of the light-emitting device, the higher the ambient light intensity of the light-emitting device at a historical moment, the higher the historical luminous brightness of the light-emitting device at the historical moment.

[0041] On the contrary, if the luminous intensity of the light-emitting device decreases as the ambient light intensity increases within a certain historical time period, or the luminous intensity of the light-emitting device increases as the ambient light intensity decreases within a certain historical time period, there is a high probability that the light-emitting device is abnormal within the historical time period, or there is a high probability that noise data exists in the luminous intensity data set of the light-emitting device within the historical time period, or there is a high probability that noise data exists in the ambient light intensity data set within the historical time period; as a result, the ambient light intensity data set or the luminous intensity data set of the light-emitting device within the historical time period has a low degree of reference for the prediction of the ambient light intensity.

[0042] For example, for historical moments W1, W2, W3, W4, W5, W6 and W7, the historical ambient light intensities corresponding to different historical moments are A1, A2, A3, A4, A5, A6 and A7 respectively, and the luminous brightness corresponding to the light-emitting devices at different historical moments are B1, B2, B3, B4, B5, B6 and B7 respectively.

[0043] Among these 7 historical moments, the time period from historical moment W1 to W7 can be used as the time period of historical moment W4. If the historical ambient light intensity corresponding to historical moment W4 is A4, and the historical ambient light intensity A4 is the largest among the historical ambient light intensities A1 to A7, then the ranking of historical ambient light intensity A4 among the historical ambient light intensities A1 to A7 is 1; if the historical luminous brightness B4 is the smallest among the historical luminous brightnesses B1 to B7, it means that the probability of abnormality of the light-emitting device at historical moment W4 is relatively high, and the ambient light intensity A4 corresponding to historical moment W4 has a low reference value for the ambient light prediction of the next moment.

[0044] In this way, through the first ranking information of ambient light intensity and the second ranking information of luminous brightness, it is possible to simply and effectively determine whether there is an abnormality in the historical ambient light intensity at a historical moment, assign a higher real factor to the historical ambient light intensity without abnormalities, and increase the contribution of the historical ambient light intensity without abnormalities to the prediction of the ambient light intensity at the next moment from the current moment, which helps to more accurately predict the ambient light intensity at the next moment from the current moment.

[0045] In one embodiment, the real factor of the ambient light intensity at a historical moment is obtained in the following manner: the ranking of the target ambient light intensity among multiple historical ambient light intensities in the time period where the historical moment is located is used as the first ranking information; the target ambient light intensity is the ambient light intensity of the light-emitting device at the historical moment; the ranking of the luminous brightness of the light-emitting device at the historical moment among multiple historical luminous brightnesses in the time period where the historical moment is located is used as the second ranking information, and the difference information between the first ranking information and the second ranking information is determined; the fluctuation degree value of the ambient light intensity of the light-emitting device at the historical moment is obtained, and the real factor of the ambient light intensity of the light-emitting device at the historical moment is determined based on the difference information and the fluctuation degree value.

[0046] A historical moment refers to any moment within a period of time before the current moment. For example, a historical moment may refer to any moment within 5 minutes before the current moment. As the moment before the current moment, the ambient light intensity and luminous intensity of the light-emitting device at the historical moment can provide valuable reference for the light-emitting device at the current moment or the next moment.

[0047] Since the light-emitting device of the embodiment of the present application will increase the luminous brightness as the ambient light intensity increases, or the light-emitting device will reduce the luminous brightness as the ambient light intensity decreases, therefore, when there is no abnormality in the ambient light intensity or the luminous brightness of the light-emitting device, the higher the ambient light intensity of the light-emitting device at a historical moment, the higher the historical luminous brightness of the light-emitting device at the historical moment.

[0048] The time periods corresponding to different historical moments have the same length, but the time periods corresponding to different historical moments are at different moments, that is, the time period at which a historical moment is located refers to the historical time period adjacent to the historical moment.

[0049] The duration of the time period in which the historical moment is located can be a pre-set 1 minute or 2 minutes. For example, it can be 30 seconds before the historical moment and 30 seconds after the historical moment, which together constitute a 1-minute time period. The duration of the time period in which the historical moment is located can be set according to actual needs.

[0050] For example, for historical moments W1, W2, W3, W4, W5, W6 and W7, the historical ambient light intensities corresponding to different historical moments are A1, A2, A3, A4, A5, A6 and A7 respectively, and the luminous brightness corresponding to the light-emitting devices at different historical moments are B1, B2, B3, B4, B5, B6 and B7 respectively.

[0051] Among these 7 historical moments, the time period from historical moment W1 to W7 can be used as the time period of historical moment W4. If the historical ambient light intensity corresponding to historical moment W4 is A4, and the historical ambient light intensity A4 is the largest among the historical ambient light intensities A1 to A7, then the ranking of historical ambient light intensity A4 among the historical ambient light intensities A1 to A7 is 1, and the historical luminous brightness B4 is usually the largest among the historical luminous brightnesses B1 to B7. Therefore, the ranking of historical luminous brightness B4 among the historical luminous brightnesses B1 to B7 is also usually 1.

[0052] When there is no abnormality in the ambient light intensity or the luminous brightness of the light-emitting device, the ranking corresponding to the ambient light intensity at the same historical moment is highly consistent with the ranking corresponding to the luminous intensity of the light-emitting device at the same historical moment. When there is no abnormality in the light-emitting device or the ambient light intensity, the ambient light intensity or luminous intensity of the light-emitting device is more valuable for reference.

[0053] Therefore, the difference information between the first ranking information and the second ranking information is determined, and the difference information can characterize the probability that the ambient light intensity of the device is abnormal at the historical moment, and when the ambient light intensity is not abnormal at the historical moment, the real factor determined according to the difference information can better characterize the degree of match between the ambient light intensity and the luminous brightness at the historical moment.

[0054] The luminous intensity of the light-emitting device can be obtained by a light intensity sensor set on the luminous surface of the light-emitting device. For example, for an LED billboard, the side of the billboard that displays information by emitting light is the luminous surface, and the back side of the billboard that displays information by emitting light is the non-luminous surface; or, since the luminous intensity of the light-emitting device is controlled by the controller of the light-emitting device, the luminous intensity of the light-emitting device can also be obtained directly from the controller of the light-emitting device.

[0055] In the embodiment of the present application, the luminous intensity of the light-emitting device is obtained when the light-emitting device is emitting light; and when the light-emitting device is not emitting light, the process of obtaining the luminous intensity of the light-emitting device is suspended.

[0056] In step S102, the historical prediction value of the historical ambient light intensity at the historical moment is obtained, and the prediction error value at the current moment is determined according to the historical prediction value corresponding to the historical moment and the true factor.

[0057] Since the real factor can characterize the degree of match between the ambient light intensity at a historical moment and the luminous brightness of the light-emitting device, combining the real factor with the historical prediction value can determine the prediction error value of the ambient light intensity at the current moment, so as to more accurately determine the ambient light intensity at the next moment.

[0058] Prediction error value , is the number of historical moments before the current moment, is the preset first positive value, is the predicted value of the historical ambient light intensity at the nth historical moment, is the actual value of the historical ambient light intensity at the nth historical moment; It is the ratio of the real factor of the ambient light intensity at the nth historical moment to the time interval; the target time interval is the time interval between the historical moment and the current moment.

[0059] The number N of historical moments before the current moment may be 50, for example. is the preset first positive value, for example It can be a positive number such as 0.1 and 0.2; the prediction error value is used to characterize the error amount when predicting the ambient light intensity at the current moment, and the prediction error value can be used to determine the predicted value of the ambient light intensity at the next moment.

[0060] The historical predicted values ​​of the ambient light intensity at historical moments in the embodiment of the present application can be obtained through models such as an autoregressive model, a moving average model, an autoregressive moving average model, and an autoregressive integrated sliding average model.

[0061] It is the ratio of the real factor target time interval of the ambient light intensity at the nth historical moment; the longer the time interval between the historical moment and the current moment, the closer the historical moment is to the current moment. Therefore, the ambient light intensity of the light-emitting device at the historical moment is more valuable for reference to the prediction of the ambient light intensity of the light-emitting device at the current moment or the next moment. When the ambient light intensity at the historical moment closer to the current moment is used for prediction, the probability of error in the prediction result is smaller, or the error between the prediction result and the actual result is smaller.

[0062] The prediction error value The calculation formula exists in , the historical moment with a greater real factor corresponds to The historical moment corresponding to a larger one, or a smaller time interval with the current moment Bigger, and through the historical moment With multiple historical moments The ratio of the sum of Normalization processing.

[0063] In this way, by considering the real factor and the time interval between the historical moment and the current moment, a more accurate prediction error value of the ambient light intensity at the current moment can be determined, so as to determine a more accurate prediction value of the ambient light intensity at the next moment.

[0064] In step S103, the sum of the ambient light intensity at the current moment and the prediction error value is used as the target prediction value of the ambient light intensity at the next moment.

[0065] Since the prediction error value at the current moment is determined based on the difference between the predicted value of the ambient light intensity at the historical moment and the actual value of the ambient light intensity at the historical moment, and the prediction error value can reflect the prediction error of the ambient light intensity as a whole, and the prediction error value can reflect the difference between the predicted value and the actual value of the ambient light intensity, therefore, the prediction error value at the current moment can be added to the actual value of the ambient light intensity of the light-emitting device at the current moment to obtain the target prediction value of the ambient light intensity at the next moment.

[0066] The target prediction value can be used to predict the ambient light intensity at the next moment, so that the lighting device can better match the change in ambient light intensity at the next moment, allowing the user to better view the information indicated by the lighting device, or allowing the user to better view the information on the display board illuminated by the lighting device.

[0067] In step S104, the target luminous brightness is determined according to the target prediction value and the preset corresponding relationship, so as to control the luminescence of the D-LED lamp beads in the luminous device at the next moment according to the target luminous brightness.

[0068] The preset correspondence is used to characterize the correspondence between the ambient light intensity and the luminous brightness of the light-emitting device. In order to enable the light-emitting device to adapt to the ambient light intensity, the luminous brightness of the light-emitting device can be adaptively adjusted according to the ambient light intensity at the location of the light-emitting device.

[0069] For example, the D-LED lamp beads installed on the frame advertisements set up outdoors can use higher luminous brightness as the ambient light intensity increases, and use lower luminous brightness as the ambient light intensity decreases. This ensures that when the ambient light intensity changes, users can always see the advertising content displayed by the frame advertisement more clearly.

[0070] The preset corresponding relationship may be pre-stored in the memory of the light-emitting device, and when the controller of the light-emitting device controls the light emission of the light-emitting device, the controller of the light-emitting device calls it from the memory of the light-emitting device.

[0071] The preset corresponding relationship can be pre-stored in the memory of the light-emitting device by the manufacturer when the light-emitting device leaves the factory, or can be obtained by the user of the light-emitting device after debugging the relationship between the light brightness of the light-emitting device and the ambient light intensity.

[0072] In one embodiment, the light emission of D-LED lamp beads in a light-emitting device at the next moment is controlled according to a target light-emitting brightness, including: determining the number of D-LED lamp beads required to emit light in the light-emitting device and the light-emitting intensity of the lamp beads according to the target light-emitting brightness; and controlling the light emission of the D-LED lamp beads in the light-emitting device according to the number of D-LED lamp beads required to emit light in the light-emitting device and the light-emitting intensity of the lamp beads.

[0073] For example, in the case where the light-emitting device is the background light of a billboard, the background light is usually provided with a plurality of LED lamp beads arranged in a certain regular pattern. The plurality of LED lamp beads can be arranged with equal intervals in rows and in columns. The light-emitting device at the next moment can be controlled by the number of lamp beads that emit light and the brightness of the lamp beads when the lamp beads emit light. The cumulative sum of the luminous intensities of the plurality of lamp beads that emit light at the next moment can be equal to the determined target luminous brightness.

[0074] When the ambient light intensity is low, since the user can notice the light-emitting device through a lower brightness, the lamp beads can be controlled to emit light with a lower brightness. Alternatively, the distance between the lamp beads that emit light can be increased while ensuring the integrity of the displayed information, thereby reducing the power consumption required for the lamp beads to emit light.

[0075] For example, when the ambient light intensity is higher, bold fonts may be used for display. In bold fonts, more lamp beads need to be lit, which can help users notice the light-emitting device or the object illuminated by the light-emitting device when the ambient light intensity is higher.

[0076] For another example, when the ambient light intensity is lower, a non-bold font can be used for display. In the case of a non-bold font, a smaller number of light beads need to be lit, which can reduce the required power consumption while ensuring that the user pays attention to the displayed information.

[0077] In this way, by controlling the light emission of the D-LED lamp beads in the light emitting device according to the number of D-LED lamp beads required to emit light and the light emission intensity of the lamp beads, the light emission of the D-LED lamp beads in the light emitting device can be flexibly controlled.

[0078] A brightness adjustment method for D-LED lamp beads provided by an embodiment of the present application uses the sum of the ambient light intensity at the current moment and the prediction error value as a target prediction value of the ambient light intensity at the next moment; and determines the target luminous brightness based on the target prediction value and a preset corresponding relationship, so as to control the luminescence of the D-LED lamp beads in the light-emitting device at the next moment according to the target luminous brightness; compared to directly adjusting the brightness of the D-LED lamp beads according to the ambient light brightness at the current moment, since the target luminous brightness is determined based on the target prediction value of the ambient light intensity, the brightness of the D-LED light beads can better adapt to changes in the ambient light intensity, so that the luminous brightness of the D-LED light beads better matches the ambient light intensity.

[0079] At the same time, since the prediction error value at the current moment is determined based on the historical prediction value at the corresponding historical moment and the true factor, the true factor is used to characterize the degree of matching between the historical ambient light intensity and the historical luminous brightness of the light-emitting device at the historical moment, a more accurate prediction error value can be obtained at the current moment, thereby more accurately obtaining the predicted amount of ambient light intensity at the next moment. Therefore, the D-LED lamp beads can better adapt to changes in ambient light intensity.

[0080] In one embodiment, determining difference information between the first ranking information and the second ranking information includes: , where L is the difference between the first ranking information and the second ranking information, For the first ranking information, is the second ranking information, a is the preset second positive value, To take the absolute value operation.

[0081] Among them, a can be a value greater than 0, such as 0.01 and 0.02. Since the value after taking the absolute value is greater than or equal to 0, the existence of a can ensure that the value of L is greater than 0, avoiding the situation where the value of L is 0. When various parameters including the difference information L are used for subsequent calculations, the role of various parameters involved in the calculation can be fully utilized.

[0082] In one embodiment, the fluctuation degree of the ambient light intensity at a historical moment is determined by: ,in, is the fluctuation value of the ambient light intensity of the luminous device at the historical moment, T is the number of historical ambient light intensities corresponding to the time period of the historical moment, G is the ambient light intensity of the luminous device at the historical moment, is the ambient light intensity of the tth other historical moment in the time period of the light-emitting device at the historical moment, a is a preset second positive value, P is the standard deviation of the ambient light intensity of the light-emitting device in the time period of the historical moment, O is the average value of the ambient light intensity of the light-emitting device in the time period of the historical moment, To take the absolute value operation.

[0083] Among them, a can be a value greater than 0, such as 0.01 and 0.02. Since the value after taking the absolute value is greater than or equal to 0, the existence of a can ensure that the value of Y is greater than 0, avoiding the situation where the value of Y is 0. When various parameters including the fluctuation degree value Y are used for subsequent calculations, the role of various parameters involved in the calculation can be fully utilized.

[0084] In this way, by comparing the ambient light intensity of the light-emitting device at the historical moment with other ambient light intensities in the time period of the historical moment, since the other ambient light intensities being compared are in the same time period as the historical moment, the fluctuation degree value of the ambient light intensity of the light-emitting device at the historical moment can be better determined, and the fluctuation degree value can better characterize the fluctuation degree of the ambient light intensity of the light-emitting device at the historical moment.

[0085] In one embodiment, determining the real factor of the ambient light intensity of the light emitting device at a historical moment according to the difference information and the fluctuation degree value includes: , where E is the real factor of the ambient light intensity of the luminous device at the historical moment, L is the difference information between the first ranking information and the second ranking information, Y is the fluctuation value of the ambient light intensity of the luminous device at the historical moment, exp is an exponential function with a natural constant as the base; R is the correlation coefficient between the ambient light intensity and the luminous brightness of the luminous device in the time period of the historical moment, To take the absolute value operation.

[0086] The higher the fluctuation value of the ambient light intensity of the light-emitting device at the historical moment, the greater the fluctuation of the ambient light intensity of the light-emitting device at the historical moment, and the data set of the ambient light intensity of the light-emitting device at the historical moment has a higher probability of containing noise data. Using the fluctuation value as the denominator in the calculation can reduce the contribution of possible noise data to the real factor at the historical moment, avoid the adverse effects of possible noise data on the real factor, and thus obtain a more accurate real factor.

[0087] In this way, by processing the correlation coefficient with an exponential function, it is possible to keep the change direction of the correlation coefficient consistent with that of the real factor, and to normalize the value of the correlation coefficient to a value greater than 0 and less than 1, making it easier for the correlation coefficient to participate in the calculation process of the real factor.

[0088] In one embodiment, the correlation coefficient between the ambient light intensity and the luminous brightness of the light-emitting device in the time period where the historical moment is located is obtained in the following manner: obtaining an ambient light intensity data set composed of multiple ambient light intensities of the light-emitting device in the time period where the historical moment is located; obtaining a luminous brightness data set composed of multiple luminous brightnesses of the light-emitting device in the time period where the historical moment is located; and using the Pearson correlation coefficient between the ambient light intensity data set and the luminous brightness data set as the correlation coefficient between the ambient light intensity and the luminous brightness of the light-emitting device in the time period where the historical moment is located.

[0089] Since the luminous brightness of the light-emitting device corresponds to the ambient light intensity, there is a correlation between the luminous brightness of the light-emitting device and the ambient light intensity over a period of time. If there is noise data in the data set of ambient light intensity, or if there is noise data in the data set of luminous brightness, it may have an adverse effect on the subsequent prediction of ambient light intensity.

[0090] By determining the correlation coefficient between the ambient light intensity and the luminous brightness of the light-emitting device over a period of time, a smaller real factor can be assigned to historical moments with noise data, thereby reducing the contribution of the historical ambient light intensity corresponding to the historical moments with noise data when performing subsequent ambient light predictions, thereby obtaining a more accurate prediction result of the ambient light intensity for the next moment after the current moment.

[0091] Since the luminous brightness of the luminous device in the embodiment of the present application is positively correlated with the ambient light brightness, if the Pearson correlation coefficient determined by the ambient light intensity data set and the luminous brightness data set is 0, it means that there is no relationship between the ambient light intensity and the luminous brightness in a historical period of time, and there is a high probability that noise data exists in the ambient light intensity data set and the luminous brightness data set. Alternatively, if the Pearson correlation coefficient determined by the ambient light intensity data set and the luminous brightness data set is a negative number, it means that there is a negative correlation between the ambient light intensity and the luminous brightness in a historical period of time, and there is a high probability that noise data exists in the ambient light intensity data set and the luminous brightness data set.

[0092] Therefore, by determining the Pearson correlation coefficient between the ambient light intensity dataset and the luminous brightness dataset during the time period of the historical moment, it can help to determine a more accurate true factor.

[0093] In one embodiment, the cumulative lighting time of the D-LED lamp beads in the light-emitting device after the first power-on can also be obtained, and the luminous intensity of the D-LED lamp beads required for lighting can be obtained; based on the cumulative lighting time and the luminous intensity of the lamp beads, the power compensation amount of the D-LED lamp beads is determined to obtain the power of the D-LED lamp beads when they are lighting.

[0094] As the cumulative lighting time of the D-LED lamp beads increases, the D-LED lamp beads have a certain light decay, so that when the lamp beads emit light at the same power, due to the increase in the cumulative lighting time of the D-LED lamp beads, the actual brightness of the lamp beads will be smaller than the set lighting brightness.

[0095] For example, the actual brightness of a lamp bead with a cumulative lighting time of 7,000 hours may decay to 97.5% of the initial brightness, and the actual brightness of a lamp bead with a cumulative lighting time of 9,000 hours may decay to 96.7% of the initial brightness; among which, the initial brightness refers to the brightness that a lamp bead with a cumulative lighting time of 0 can achieve when working at the same power.

[0096] As the cumulative lighting time of the D-LED lamp beads increases, the actual brightness of the D-LED lamp beads will decay to a certain extent, and the power compensation required under different lamp bead lighting intensities is different. In order to make the actual brightness output by the D-LED lamp beads consistent with the expected brightness, the power compensation amount of the D-LED lamp beads can be determined based on the cumulative lighting time of the D-LED lamp beads and the target lamp bead lighting brightness; the target lamp bead lighting brightness refers to the actual lamp bead lighting brightness that the D-LED lamp beads need to achieve.

[0097] The longer the cumulative lighting time of the D-LED lamp beads is, the greater the power compensation amount required for the D-LED lamp beads is; conversely, the shorter the cumulative lighting time of the D-LED lamp beads is, the smaller the power compensation amount required for the D-LED lamp beads is.

[0098] The relationship between the cumulative lighting time, the luminous intensity of the lamp beads, and the power compensation amount can be determined by performing actual tests or simulation tests on the D-LED lamp beads; for example, within the power range supported by the D-LED, there is an initial power corresponding to the luminous intensity of the lamp beads, and different luminous intensities of the lamp beads correspond to different initial powers; when the D-LED lamp beads emit light according to the initial power under the cumulative lighting time, the power compensation amount required to enable the D-LED lamp beads to actually output an actual brightness consistent with the luminous intensity of the lamp beads can be tested.

[0099] When the required power compensation amount is determined, the initial power corresponding to the luminous intensity of the lamp bead and the power compensation amount can be added to obtain the power required for the D-LED lamp bead to emit light.

[0100] Among them, the power compensation for the D-LED lamp beads is carried out within the power range supported by the D-LED; for example, when the sum of the initial power corresponding to the luminous intensity of the lamp beads and the power compensation amount is greater than the upper limit of the power range supported by the D-LED lamp beads, in order to ensure the service life of the D-LED lamp beads, the power of the D-LED lamp beads is no longer compensated, and the lamp beads emit light according to the initial power corresponding to the luminous intensity of the lamp beads.

[0101] In this way, the power compensation amount of the D-LED lamp bead is determined according to the cumulative lighting time and the luminous intensity of the lamp bead to obtain the power of the D-LED lamp bead when it is emitting light. This can avoid the limitation of the actual brightness of the D-LED lamp bead due to the light decay phenomenon of the D-LED lamp bead, and ensure that the D-LED lamp bead can output the actual luminous brightness consistent with the expected brightness.

[0102] It should be understood that the features of some embodiments of the various applications described herein may be combined with each other, unless specifically stated otherwise.

[0103] Although terms such as "first", "second", and "third" may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Instead, these terms are only used to distinguish one component, part, region, layer, or section from another component, part, region, layer, or section. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section.

[0104] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description herein, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0105] In addition, the word "exemplary" is used herein to mean serving as an example, instance, or diagram. Any aspect or design described herein as "exemplary" is not necessarily to be understood as being advantageous over other aspects or designs. Instead, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or".

[0106] Likewise, although the present application has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. With particular regard to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise noted, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if not structurally equivalent to the disclosed structures.

[0107] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application, and the specification and embodiments are only considered as exemplary.

[0108] It will be appreciated that the present application is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A brightness adjustment method for D-LED lamp beads, characterized in that: include: Obtaining a real factor of the ambient light intensity of the light-emitting device at a historical moment, where the real factor is used to characterize the degree of matching between the historical ambient light intensity and the historical luminous brightness of the light-emitting device at the historical moment; Obtain the historical prediction value of the historical ambient light intensity at the historical moment, and determine the prediction error value at the current moment according to the historical prediction value and the true factor at the corresponding historical moment; The sum of the ambient light intensity at the current moment and the prediction error value is used as the target prediction value of the ambient light intensity at the next moment; Determine the target luminous brightness according to the target prediction value and the preset corresponding relationship, so as to control the luminescence of the D-LED lamp beads in the luminous device at the next moment according to the target luminous brightness, wherein the preset corresponding relationship is used to characterize the corresponding relationship between the ambient light intensity and the luminous brightness; Among them, the prediction error value , is the number of historical moments before the current moment, is the preset first positive value, is the predicted value of the historical ambient light intensity at the nth historical moment, is the actual value of the historical ambient light intensity at the nth historical moment; It is the ratio of the real factor of the ambient light intensity at the nth historical moment to the target time interval, where the target time interval is the time interval between the historical moment and the current moment.

2. The brightness adjustment method for D-LED lamp beads according to claim 1, characterized in that: The actual factor of ambient light intensity at a historical moment is obtained by: The ranking of the target ambient light intensity among the multiple historical ambient light intensities in the time period of the historical moment is used as the first ranking information; the target ambient light intensity is the ambient light intensity of the light emitting device at the historical moment; taking the ranking of the luminous brightness of the luminous device at the historical moment among the multiple historical luminous brightnesses in the time period where the historical moment is located as the second ranking information, and determining the difference information between the first ranking information and the second ranking information; The fluctuation degree value of the ambient light intensity of the light-emitting device at the historical moment is obtained, and the real factor of the ambient light intensity of the light-emitting device at the historical moment is determined according to the difference information and the fluctuation degree value.

3. The brightness adjustment method for D-LED lamp beads according to claim 2, characterized in that: Determining difference information between the first ranking information and the second ranking information includes: , where L is the difference between the first ranking information and the second ranking information, For the first ranking information, is the second ranking information, a is the preset second positive value, To take the absolute value operation.

4. The brightness adjustment method for D-LED lamp beads according to claim 2, characterized in that: The fluctuation degree of ambient light intensity at a historical moment is determined by the following method: ,in, is the fluctuation value of the ambient light intensity of the luminous device at the historical moment, T is the number of historical ambient light intensities corresponding to the time period of the historical moment, G is the ambient light intensity of the luminous device at the historical moment, is the ambient light intensity of the tth other historical moment in the time period of the light-emitting device at the historical moment, a is a preset second positive value, P is the standard deviation of the ambient light intensity of the light-emitting device in the time period of the historical moment, O is the average value of the ambient light intensity of the light-emitting device in the time period of the historical moment, To take the absolute value operation.

5. The brightness adjustment method for D-LED lamp beads according to claim 2, characterized in that: Determining the real factor of the ambient light intensity of the light emitting device at a historical moment according to the difference information and the fluctuation degree value includes: , where E is the real factor of the ambient light intensity of the luminous device at the historical moment, L is the difference information between the first ranking information and the second ranking information, Y is the fluctuation value of the ambient light intensity of the luminous device at the historical moment, exp is an exponential function with a natural constant as the base; R is the correlation coefficient between the ambient light intensity and the luminous brightness of the luminous device in the time period of the historical moment, To take the absolute value operation.

6. The brightness adjustment method for D-LED lamp beads according to claim 5, characterized in that: The correlation coefficient between the ambient light intensity and the luminous brightness of the luminous device during the time period of the historical moment is obtained in the following way: Obtain an ambient light intensity data set consisting of multiple ambient light intensities of light-emitting devices within a time period of a historical moment; Obtain a luminous brightness data set consisting of multiple luminous brightnesses of luminous devices within the time period of the historical moment; The Pearson correlation coefficient between the ambient light intensity data set and the luminous brightness data set is used as the correlation coefficient between the ambient light intensity and the luminous brightness of the luminous device in the time period of the historical moment.

7. The brightness adjustment method for D-LED lamp beads according to claim 1, characterized in that: The method of controlling the D-LED lamp beads in the light-emitting device to emit light at the next moment according to the target light-emitting brightness includes: According to the target luminous brightness, determine the number of D-LED lamp beads required to emit light in the light-emitting device and the luminous intensity of the lamp beads; According to the number of D-LED lamp beads required to emit light in the light-emitting device and the light-emitting intensity of the lamp beads, the light emission of the D-LED lamp beads in the light-emitting device is controlled.

8. The brightness adjustment method for D-LED lamp beads according to claim 7, characterized in that: The method further comprises: Obtain the cumulative lighting time of the D-LED lamp beads in the lighting device after the first power-on, and obtain the lamp bead luminous intensity required for the D-LED lamp beads to emit light; According to the accumulated luminous duration and the luminous intensity of the lamp beads, the power compensation amount of the D-LED lamp beads is determined to obtain the power of the D-LED lamp beads when they are luminous.

Images