CN-121751425-B - Ultra-low power consumption micro LED visible light intensity self-adaptive regulation and control method and system

CN121751425BCN 121751425 BCN121751425 BCN 121751425BCN-121751425-B

Abstract

The invention relates to the technical field of intelligent control, and discloses a method and a system for adaptively regulating and controlling visible light intensity of a micro LED with ultra-low power consumption, wherein the method comprises the steps of obtaining an analog light intensity signal and obtaining an ambient light intensity value through smoothing treatment; calculating the light intensity change rate, marking the environment state and outputting a light intensity difference value if the light intensity change rate exceeds a dynamic threshold, generating a preliminary adjustment instruction according to the state matching control parameter and the difference value quantization mapping, calculating the target light intensity by combining the basic brightness, calculating the actual and target deviation after executing the instruction, iteratively correcting to obtain a light intensity control signal, optimizing the signal amplitude if the power consumption exceeds the limit, inputting a driving circuit to analyze and synthesize the pulse current, exciting the pixels to emit light and converging to obtain adjustment data, calculating the visual contrast, and readjusting the change rate to realize closed-loop refining if the visual contrast is lower than the threshold, thereby improving the light intensity adjustment accuracy. The method can improve the real-time sensing capability of the ambient light.

Inventors

WANG BIN
CHEN GUOFENG

Assignees

深圳市佰强光电有限公司

Dates

Publication Date: 20260508
Application Date: 20260227

Claims (7)

1. The method for adaptively regulating and controlling the visible light intensity of the miniature LED with ultra-low power consumption is characterized by comprising the following steps of: acquiring an analog light signal and preprocessing to obtain an ambient light intensity value; Calculating the light intensity change rate according to the environment light intensity value, and if the light intensity change rate exceeds a preset dynamic environment change threshold value, marking the environment state and outputting an environment light intensity difference value; matching a preset control and regulation parameter according to the environment state, carrying out quantitative mapping on the environment light intensity difference value according to the control and regulation parameter, generating a preliminary light intensity adjustment instruction, and calculating a target light intensity level by combining with a preset device basic brightness; Executing the preliminary light intensity adjustment instruction, calculating the deviation between the adjusted actual light intensity and the target light intensity level, calculating a light intensity correction increment according to the deviation, and correcting the light intensity to obtain a light intensity control signal; If the power consumption corresponding to the light intensity control signal exceeds a preset low power consumption range, reducing the signal amplitude to obtain an optimized control signal; Inputting the optimized control signal into a driving circuit, generating pulse driving current after analysis and synthesis, exciting a pixel array to generate instant luminous flux, converging the instant luminous flux, and generating adjustment light intensity data; Calculating a visual contrast value according to the light intensity adjustment data, and if the visual contrast value is lower than a preset visual perception threshold value, recalculating the light intensity change rate and adjusting a control signal to realize closed-loop refining of light intensity adjustment accuracy; The method for calculating the target light intensity level by matching the environmental state with a preset control adjustment parameter, carrying out quantization mapping on the environmental light intensity difference value according to the control adjustment parameter, generating a preliminary light intensity adjustment instruction and combining with a preset device basic brightness comprises the following steps: according to the environment state, matching the corresponding proportional gain coefficient, integral time constant and differential gain coefficient, and respectively calculating with the environment light intensity difference value to generate a control variable value; Performing quantization mapping processing on the control variable value to generate a preliminary light intensity adjustment instruction; according to the preliminary light intensity adjustment instruction, calculating the current brightness of the equipment to obtain a target light intensity level; the initial light intensity adjustment instruction is executed, the deviation between the adjusted actual light intensity and the target light intensity level is calculated, the light intensity correction increment is calculated according to the deviation, the light intensity is corrected, and a light intensity control signal is obtained: Executing the preliminary light intensity adjustment instruction, obtaining the adjusted actual light intensity, and calculating the deviation between the adjusted actual light intensity and the target light intensity level, wherein the deviation comprises a light intensity deviation amplitude and a deviation direction sign; Performing feedback iteration on the light intensity deviation amplitude, updating a correction step length and a feedback gain coefficient, and calculating a light intensity correction increment by combining the deviation direction symbol and the correction step length; If the light intensity correction increment is larger than a preset minimum convergence threshold, continuously updating the correction step length and the feedback gain coefficient, and gradually reducing the light intensity correction increment; and if the light intensity correction increment is smaller than or equal to a preset minimum convergence threshold, locking the control variable value and carrying out drive protocol formatting packaging to obtain a light intensity control signal.
2. The method for adaptively adjusting and controlling visible light intensity of a micro LED with ultra-low power consumption according to claim 1, wherein the steps of obtaining an analog light signal and preprocessing the analog light signal to obtain an ambient light intensity value comprise: obtaining an analog optical signal, and performing discretization on the analog optical signal to obtain an original discrete light intensity sequence; and carrying out Kalman filtering on the original discrete light intensity sequence, and outputting to obtain a smooth ambient light intensity value.
3. The method for adaptively adjusting and controlling visible light intensity of a micro LED with ultra-low power consumption according to claim 1, wherein calculating a light intensity change rate according to the ambient light intensity value, and if the light intensity change rate exceeds a preset dynamic ambient change threshold, marking an ambient state and outputting an ambient light intensity difference value comprises: Calculating the light change rate at the current moment according to the ambient light intensity value, marking the current environment as a light mutation state if the light change rate is larger than a preset dynamic environment change threshold value, otherwise marking the current environment as a light non-mutation state; and calculating the light intensity difference between the mutation starting time and the current time to obtain an ambient light intensity difference value, wherein the mutation starting time is the sampling point time which exceeds the threshold value judgment for the first time.
4. The method for adaptively adjusting and controlling visible light intensity of a micro LED with ultra-low power consumption according to claim 1, wherein if the power consumption corresponding to the light intensity control signal exceeds a preset low power consumption range, reducing the signal amplitude to obtain an optimized control signal, comprises: extracting an original driving voltage amplitude from the light intensity control signal, and if the original driving voltage amplitude is larger than a preset low-power-consumption voltage threshold value, constructing a linear interpolation correction function; according to the linear interpolation correction function, compressing and mapping the original driving voltage amplitude to obtain a compliance driving amplitude in a low-power consumption interval; and outputting an optimized control signal according to the compliance driving amplitude reconstruction instruction frame.
5. The method for adaptively adjusting and controlling visible light intensity of a micro LED with ultra-low power consumption according to claim 1, wherein the inputting the optimized control signal into the driving circuit, generating a pulse driving current after analysis and synthesis, exciting the pixel array to generate an instantaneous luminous flux, converging the instantaneous luminous flux, and generating the adjusted light intensity data comprises: Separating voltage amplitude data and time domain duty ratio data from the optimized control signal, and synthesizing the voltage amplitude data and the time domain duty ratio data to obtain a composite driving control voltage; According to the composite driving control voltage, adjusting parameters of a driving transistor to obtain a pulse driving current; And injecting the pulse driving current into the micro light emitting diode pixel array to excite instant luminous flux, converging the instant luminous flux and obtaining adjustment light intensity data, wherein the adjustment light intensity data comprises theoretically output brightness data and chromaticity data.
6. The method for adaptively adjusting and controlling visible light intensity of micro LED with ultra-low power consumption according to claim 1, wherein calculating the visual contrast value according to the adjusted light intensity data, and if the visual contrast value is lower than a preset visual perception threshold, recalculating the light intensity change rate and adjusting the control signal to realize closed-loop refining of the light intensity adjustment accuracy comprises: collecting actual brightness data and chromaticity deviation data of the micro light emitting diode array, and calculating a real-time visual contrast value by combining the adjustment light intensity data; If the visual contrast value is lower than a preset visual perception threshold, calculating a difference value between the visual contrast value and the visual perception threshold to obtain an error feedback quantity; And deducing an accurate driving compensation value according to the error feedback quantity, and generating a refined driving signal by utilizing the accurate driving compensation value to realize closed-loop refining of the light intensity regulation precision.
7. An ultra-low power micro LED visible light intensity adaptive regulation system, for implementing the method of any one of claims 1-6, comprising: the data acquisition module is used for acquiring the analog light signal and preprocessing the analog light signal to obtain an ambient light intensity value; The difference value calculation module is used for calculating the light intensity change rate according to the environment light intensity value, and marking the environment state and outputting an environment light intensity difference value if the light intensity change rate exceeds a preset dynamic environment change threshold value; The command generation module is used for matching preset control and regulation parameters according to the environment state, carrying out quantitative mapping on the environment light intensity difference value according to the control and regulation parameters, generating a preliminary light intensity adjustment command and calculating a target light intensity level by combining with preset equipment basic brightness; the deviation correction module is used for executing the preliminary light intensity adjustment instruction, calculating the deviation between the adjusted actual light intensity and the target light intensity level, calculating a light intensity correction increment according to the deviation, and correcting the light intensity to obtain a light intensity control signal; the control optimization module is used for reducing the signal amplitude and obtaining an optimized control signal if the power consumption corresponding to the light intensity control signal exceeds a preset low power consumption range; The circuit adjusting module is used for inputting the optimized control signal into the driving circuit, generating pulse driving current after analysis and synthesis, exciting the pixel array to generate instant luminous flux, converging the instant luminous flux and generating adjusting light intensity data; and the feedback optimization module is used for calculating a visual contrast value according to the light intensity adjustment data, and if the visual contrast value is lower than a preset visual perception threshold value, recalculating the light intensity change rate and adjusting a control signal to realize closed-loop refining of light intensity adjustment accuracy.

Description

Ultra-low power consumption micro LED visible light intensity self-adaptive regulation and control method and system Technical Field The invention relates to the technical field of intelligent control, in particular to a method and a system for adaptively regulating and controlling visible light intensity of an ultra-low power consumption miniature LED. Background At present, under the background of the rapid development of novel lighting technology, a miniature Light Emitting Diode (LED) is used as a high-efficiency energy-saving light source, and has wide application potential in the fields of intelligent display, wearable equipment and the Internet of things, and the light intensity adjusting performance of the miniature Light Emitting Diode (LED) is directly related to the cruising ability and the user experience of the equipment. Especially in dynamic illumination environment, for example, when a user steps from indoor to outdoor, the light intensity rises from hundreds of lux to thousands of lux in a few seconds, the prior art is difficult to realize quick and accurate response, so that the screen brightness adjustment is lagged, visual discomfort is caused, and unnecessary energy consumption is caused. This challenge highlights the urgent need to balance energy efficiency with visual comfort in complex light environments. In one prior art, ultra-low power micro LED visible light intensity regulation methods typically rely on fixed frequency sampling of ambient light sensors, combined with basic filtering algorithms (e.g., moving average filtering) to remove noise, and employ static threshold comparisons to trigger light intensity adjustment. For example, when the ambient light intensity exceeds a predetermined threshold, such as 500 lux, the system increases the LED drive current in a linear proportion to increase the brightness. However, the method has obvious defects that the system can not identify the abrupt change event in time under the scene of severe fluctuation of the ambient light, such as rapid rise of the light intensity from 300 lux to 8000 lux in 3 seconds, because the dynamic calculation of the light change rate and the real-time feedback cycle are not introduced. The calculation shows that the overall delay from data acquisition to drive adjustment can reach more than 200 milliseconds and is far higher than the light variation instantaneous requirement, so that the adjustment response is slow, the light intensity output is disjointed from the actual environment, and the readability of the screen content is reduced or excessive power consumption is caused. In summary, the prior art has the problem that the real-time sensing capability of the ambient light is insufficient, and the accurate regulation and control cannot be completed within millisecond, so that the energy efficiency and stability requirements in the dynamic environment are difficult to meet. Disclosure of Invention The invention provides a method and a system for adaptively regulating and controlling visible light intensity of an ultra-low power miniature LED (light emitting diode) so as to solve the problem of insufficient real-time sensing capability of ambient light in the prior art. In order to solve the above technical problems, the present invention provides a method for adaptively adjusting and controlling visible light intensity of an ultra-low power micro LED, comprising: acquiring an analog light signal and preprocessing to obtain an ambient light intensity value; Calculating the light intensity change rate according to the environment light intensity value, and if the light intensity change rate exceeds a preset dynamic environment change threshold value, marking the environment state and outputting an environment light intensity difference value; matching a preset control and regulation parameter according to the environment state, carrying out quantitative mapping on the environment light intensity difference value according to the control and regulation parameter, generating a preliminary light intensity adjustment instruction, and calculating a target light intensity level by combining with a preset device basic brightness; Executing the preliminary light intensity adjustment instruction, calculating the deviation between the adjusted actual light intensity and the target light intensity level, calculating a light intensity correction increment according to the deviation, and correcting the light intensity to obtain a light intensity control signal; If the power consumption corresponding to the light intensity control signal exceeds a preset low power consumption range, reducing the signal amplitude to obtain an optimized control signal; Inputting the optimized control signal into a driving circuit, generating pulse driving current after analysis and synthesis, exciting a pixel array to generate instant luminous flux, converging the instant luminous flux, and generating adjustment light intensity data; and