Self-feedback led control method and system

Abstract

The present invention provides a self-feedback LED control method and system. In the method, the frequency f is set in the opening and closing control, and m frequencies are used as a control cycle, and n LEDs are implemented in each control cycle. Control parameter P of brightness control m,n : will control the parameter P m,n , Quantify the control relationship between the frequency f and the theoretical input current of the LED, and establish an algorithm model; the input current C and the output brightness i L The relationship between linearization, and the establishment of an algorithm model; and the combination of self-feedback, quantization, and linearization. The LED control method is especially suitable for high-frequency switching and quantitative control of single or multiple LED modules at 1KHZ-20KHZ, the actual brightness can be kept constant and the brightness also changes linearly when the input current is adjusted. And in long-term use, when the light decays, it can be adjusted to keep the brightness constant within the control range, improving the control accuracy of the device.

Description

technical field [0001] The invention relates to the technical field of LED lighting, in particular to a self-feedback LED control method and system. Background technique [0002] LED lamps have low heat generation, low power consumption, and strong controllability, and are currently vigorously promoted as energy-saving light sources. In the existing application technology of LED (Light Emitting Diode, light-emitting diode) control, for the control of LED, the existing control technology currently only exists LED switch control below 1KHZ, for high-frequency switch control, for example, the application number is 201810164212.1 , the name is a water-cooled high-power high-frequency switching power supply device, which realizes high-frequency switching, but this solution is used in large-scale power systems, and the devices involved are bulky and cannot be applied to LED control solutions. For the LED switch control above 1KHZ, especially the LED switch control of 1KHZ-20KHZ, ...

AI Technical Summary

Problems solved by technology

In the existing application technology of LED (Light Emitting Diode, light-emitting diode) control, for the control of LED, the existing control technology currently only exists LED switch control below 1KHZ, for high-frequency switch control, for example, the application number is 201810164212.1 , the name is a water-cooled high-power high-frequency switching power supply device, which realizes high-frequency switching, but this solution is used in large-scale power systems, and the devices involved are bulky and cannot be applied to LED control solutions. For the LED switch control above 1KHZ, especially the LED switch control of 1KHZ-20KHZ, there is no suitable method at present, and the existing low-frequency LED control method below 1KHZ cannot cope with the high-frequency LED switch control of 1KHZ-20KHZ , causing the current LED switch control in the frequency band of 1KHZ-20KHZ to be in a blank state

[0003] In the prior art, LED control is only a simple duty cycle control or input current regulation, and it is impossible to realize combined high-frequency periodic switching application control

[0004] In the prior art, after the LED lamps are used for a period of time, the luminous brightness will attenuate due to device loss, which will affect the control accuracy of the LED lamps.

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