The simplest definition of stroboscopic light is the constant fluctuation of light during the switching period. For example, in China, the current is transmitted by alternating current with a frequency of 50Hz, and the power supply voltage of the lamp fluctuates back and forth from peak to trough in the form of sine wave in the switching period. Therefore, it is possible to generate a strobe twice the frequency of the power supply, which is 100Hz. In the absence of a suitable electronic circuit, such as a ballast, drive, or power supply, a light source produces stroboscopic light.
At this year's CCTV 315 gala, the strobe problem of LED lamps exposed at the scene once caused a great disturbance. Stroboscopic problem is also not to be ignored, which causes a variety of harms to human experience. Currently, relevant biological and medical studies have shown that:
It can cause brain cell damage. Researchers say that by looking at electroencephalogram (eeg) images, the retinas of living organisms can detect and respond to light at frequencies between 100 and 160Hz, and even as high as 200Hz, even when the ambient light is stroking too fast to be noticed.
May affect reading and eyesight. Stroboscopic light can affect people's eye movement track when reading text, and LED lamp stroboscopic light can seriously affect users' attention, and it is easier for people to generate visual fatigue.
The stroboscopic problem is caused by the fluctuation of ac power grid. Therefore, the stroboscopic problem should be fully considered in the circuit design of LED eye-protecting desk lamp. Long close contact with human eyes by LED eye-protective lamp will cause serious stroboscopic fatigue to users and even affect vision. Enterprises should adopt drive and capacitor with excellent performance, constant current circuit and isolated DC voltage output to avoid stroboscopic problems.
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