Experts tell you the working principle and application of black LED

black LED fluorescent or incandescent bulbs look the same in many ways. But they are completely different in some places. The lights in the night clubs, science museums, amusement parks, youth bedroom and elsewhere can be seen, but for most people are unfamiliar. Next, we'll find out how it works. But also look at why the black light and black light will shine some objects some interesting applications.

As for the traditional design and black LED lighting, there are several important changes. The current through the fluorescent lamp is a tube filled with an inert gas and a small amount of mercury and produce light. When energized, the mercury atoms emit energy in the form of light photons. They issued a number of light photons, but most of the UV wavelength range is emitted photons. UV light wavelength is too short so we can not see. Fluorescent this energy must be converted into visible light.

Phosphorus is a substance that emits light when a photon hits a phosphor atom, one phosphorus electron jumps to a higher energy position, causing the atoms to vibrate and create heat. When the electron falls back to its original normal position, it will in other form of photons of energy released. This is less than the original energy of the photon energy of the photons, because some of the energy is lost as heat. Fluorescent light emitted by the visible spectrum is, black light are the same principle. There are actually two different types of black light, but they are substantially the same working principle. Tubular black light with different types of phosphor coating, the coating absorb the harmful shortwave UV-B and UV-C light and emits UV-A light (fluorescent lamps and ultraviolet and visible light absorption of phosphorus in the same basic way) Black glass itself is blocking most of the visible light, so in the end only benign long-wave UV-A light and some of the blue and violet light through. And ordinary incandescent bulbs black LED bulb is very similar, but it uses a filter to absorb light from the heating filament. In addition to infrared and UV-A light (there is a very small amount of visible light) outside the others are absorbed. Both lamp design, the emitted ultraviolet light with a different external phosphorus reacts just as the UV fluorescent phosphor coating and as long as the reaction to their UV irradiation, the external phosphorus will be light.

If you are holding a hand-held black light at night to walk, you will find there will be phosphorus to the outside of your teeth, fingernails and other things. In many synthetic materials also have phosphorus, including television screens and some paint, fabrics and plastics? Most fluorescent colored objects, such as highlighters, you will glow in the dark products all find them. Nightclubs and amusement park with a special black light paint to make it emit a different color. You can also buy invisible black light ink, fluorescent black light fluorescent black light hair carpets and even hair spray.