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To understand whether an eye-protecting LED table lamp can protect vision, we must first analyze it from its principle of illumination. Since Edison invented the light bulb, the development of the world's electric lights has gone through three generations, namely incandescent lamps, inductive fluorescent lamps and high-frequency fluorescent lamps. At present, except for incandescent lamps, the market basically belongs to the third generation of lamps, and the appearance of LED desk lamps has made the lighting era enter the fourth generation. With the passage of time, the harm of various lamps to the eyes has become increasingly prominent.
The principle of illumination of incandescent incandescent lamps is well known. The principle of electrical resistance is used to convert electrical energy into light energy, wherein the temperature of the filament is as high as 2000 °C. The price of incandescent lamps is popular among most people. Because incandescent lamps use direct current to emit light, they will produce stroboscopic problems caused by AC power when illuminating. The stroboscopic frequency is around 100HZ, because AC is 50HZ for one cycle. One bright and one dark is 100HZ. The stroboscopic has a great damage to the retina. If you work under incandescent light for a long time, it will cause vision loss and even dizziness.
Energy-saving lamps Energy-saving lamps are ultraviolet rays generated by mercury vaporization, and then these ultraviolet rays stimulate the phosphor powder to achieve the purpose of illuminating. Because the energy-saving lamp is coated with a lot of phosphor on the wall of the light, the phosphor shines and causes ultraviolet rays to be emitted, thereby causing radiation to the eyes. The energy-saving lamps are still high-lighting. The long-term work in this environment is particularly harmful to the eyes. Especially the eye tissues of young children are not fully developed, and their vision is more likely to be affected, leading to myopia.
The eye-protection eye lamp is called the eye-protection lamp. Its hoe is mainly concentrated on the stroboscopic flash. In fact, the eye-protection lamp belongs to the high-frequency flashing lamp, and its stroboscopic frequency is as high as 482HZ. This means that the eye-protection lamp is To a certain extent, people's eyes feel that the light has not changed. It uses a high-frequency electronic rectifier to adjust the current frequency to a few kilohertz or even tens of thousands of hertz, which means that the speed of the light flashes to a few seconds per second. Thousands or even tens of thousands of times, so that people can not feel the stroboscopic phenomenon. This kind of practice, the price paid is high-frequency electromagnetic radiation, high-frequency electromagnetic radiation not only hurts the eyes, but also damages the brain, especially for strong children, this effect is more obvious.
Technology is always improving. In order to solve this problem, science and technology workers have never given up and stopped chasing. The arrival of the LED era also allowed us to wait until the advent of the fourth generation of lights, then LED desk lamps. In order to better solve the mobilization of the desk lamp, the LED desk lamp also increases the charging function. Because the semiconductor cold light source is used, there is no lamp bead, and the lamp head uses a converter to convert the alternating current into direct current, which not only completely solves the stroboscopic phenomenon. The problem also eliminates light pollution and electromagnetic radiation.