The biggest problem with eye protection
Eye protection lamp The biggest problem of eye protection lamp is that electromagnetic radiation can cause great harm to the brain of students. The main selling point of the so-called eye protection lamp is no flicker, which means that the light of this kind of lamp is stable and will not flicker. This is compared to a fluorescent lamp. Since the current frequency of a fluorescent lamp is 50 Hz, the light of the fluorescent lamp will have the feeling of flashing (stroboscopic), and this flashing speed is exactly 50 per second. Back and forth (that is, 100 times).
The eye protection lamp is to prevent this kind of flashing feeling. The high-frequency electronic rectifier is used to adjust the current frequency to several kilohertz or even tens of thousands of hertz. That is to say, the speed of light flashing is adjusted to a few seconds per second. Thousands or even tens of thousands of times. When the speed of light flashes tens of thousands of times per second, the reverberation of human eyes has been unable to keep up with this speed. At this time, there will be a feeling: this kind of light does not flash and flash. Is stable.
(Illustration: When the bicycle rides slowly, we can see that the wheel is made up of steel wires, but when the bicycle rides fast, we basically can't see the steel wire, only a circle). Therefore, in the true sense, the eye protection lamp should not be non-flashing but high-frequency flashing, which is so high that the human eye can't perceive it. It is this feature of the eye protection lamp that the light it emits is more stable and more comfortable than fluorescent lamps.
However, high-frequency electronic rectifiers will bring a very serious problem, that is, high-frequency electromagnetic radiation will be generated. High-frequency electromagnetic radiation is harmful to people, especially to the brains of students who are in the developmental stage. Many parents know that the electromagnetic radiation of mobile phones is harmful to students, so children should use mobile phones as little as possible, but they do not know that the electromagnetic radiation produced by eye protection lamps is far more harmful than mobile phones. Because of its higher frequency and time of use Longer.
