Reasons why the light source of LED lights flickers
2024-03-15
First of all, what is the flicker of a light?
Flickering with frequency, the rapid and repeated changes of light over time is called stroboscopic, and the direct feeling is that the image is beating and unstable.
Flickering with frequency, the rapid and repeated changes of light over time is called stroboscopic, and the direct feeling is that the image is beating and unstable.
Most light sources have stroboscopic effects, but the degree varies. LED stroboscopic is largely not a problem with the LED chip itself, but comes from the driving and dimming components. Common causes of stroboscopic are:
1. Inferior driving components cannot reduce the "voltage and current output ripples" generated in the process of "converting from AC to DC" and from the driving components to the LED chip.
2. Inferior dimming components, either poor compatibility, or using low-frequency PWM dimming.
2. Inferior dimming components, either poor compatibility, or using low-frequency PWM dimming.
It is actually impossible to be flicker-free in an absolute sense. The Chinese industry standard’s flicker requirement for qualified products is 3125Hz. From a professional point of view, the exact name of "no stroboscopic" is "imperceptible stroboscopic". According to the "stroboscopic" requirements of the China Quality Certification Center for reading and writing desk lamps, "fluctuation depth" is a measure of the "stroboscopic" of desk lamps. ” standard value.
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