The principle of light-emitting lamps

The two poles of the energy-saving lamp are ordinary tungsten wires. When the tungsten wire is energized and heated, it can emit electrons. A relatively high voltage is applied to both sides of the lamp to form an electric field, and these electrons are accelerated in the lamp tube to form The electron flow of a certain speed and energy. The lamp is vacuumed and filled with mercury, which is what we call mercury.

In the case where the lamp is energized and heated, the mercury is evaporated from the liquid state to a gaseous state, and a mercury atom in a free state is formed. The electrons in the electron flow hit the mercury atom at a certain speed, causing the mercury atom to be excited and become an excited state. It is called a step, and the excited state of mercury spontaneously falls back after a short time. In the original state, ultraviolet light is released at the same time, and ultraviolet light cannot be used for illumination. Therefore, we apply some fluorescent substances on the inner wall of the tube. Under the bombardment of ultraviolet light, the fluorescent substance is excited to emit a relatively natural light. Can be used for our lighting.

The more common energy-saving lamps on the market have general ordinary lamps and three-primary lamps that are gradually becoming mainstream. Compared with incandescent bulbs, they have the advantage of saving electricity. The difference is that the color rendering of ordinary lamps is low, while the lamps of the three primary colors show a natural sunlight color, and the color rendering and light efficiency are better than ordinary ordinary lamps. From the above we can know that mercury plays a mediating role in energy-saving lamps. Without mercury, energy-saving lamps will not emit light. There is very little mercury in each tube.

[2] Mercury is difficult to remove after entering the human body. The workers in the factory have not been exposed to mercury for more than a decade, but now the body's mercury levels are still high, and mercury needles are still being used at any time. Therefore, the author has an instinctive fear of energy-saving lamps. In fact, there is generally no pollution in the use of mercury-containing lamps. The pollution is mainly caused by the electric light source being discarded after being scrapped. The rupture causes mercury to diffuse into the air, endangering human health and polluting the environment. Due to the difficulty of recycling and the low value of recycling, and its many other ills, the only way is to eliminate it.

Therefore, in order to overcome the above disadvantages of energy-saving lamps, LED lighting came into being. LED lamp cups and spotlights have become the mainstream of indoor lighting, and will replace energy-saving lamps, becoming the mainstream product of next-generation home lighting.