The luminescence theory of LED light

Light-emitting diodes , commonly called LED. Light-emitting diodes is just a tiny light bulb. But unlike common incandescent bulbs, light-emitting diode has no filament , and also not particularly hot , it just is a semiconductor material in which electrons move it to light. Because there is no filament light-emitting diodes will burn , so life will be longer. And light-emitting diodes little plastic bulb makes light-emitting diodes is more durable, plus the led street lights price  can more easily fit now electronic circuits. Traditional incandescent light-emitting process contains a lot of heat , which is totally a waste of energy . Heat emitted light emitting diode is very small , relatively speaking , the more energy is to reduce the need for direct light emission energy larger extent .


Light is a form of energy , an atom can be released . There is a lot of energy and momentum but did not like the quality of the tiny particles composed of small bundles . These particles are called photons, is the basic unit of light. Photon is because electrons move was released. In the atom , the electrons in the atoms move around in four tracks form . Orbital of the electron with a different type of energy. Generally speaking, in order to have a greater energy electrons move away from the nuclear track . When electrons from a lower to a higher orbital track jump , the higher energy levels , in turn , when falling from a higher to a lower orbital electron in orbital energy is released . Energy is released in the form of photons . Higher energy declined to release higher -energy photons , which is characterized by its high frequency.
Free electrons from the P -type layer is formed by the body into an empty diode electron holes . This includes from the conduction band to a lower rail drop function , the electronic energy is released in the form of photons . This can happen at any diodes inside , when the diode is composed of a substance , you just can see the photons. In standard silicon diodes atoms , for example , when the electron falls to a relatively short distance atoms are arranged in such a manner . As a result, the frequency is so low because the electronic case servant 's eyes are not visible .
Visible LED, such as using the digital clock display type , the size of the gap determines the frequency of the photon , in other words, determines the color of light. When all diodes emit light are led street lights price  , most are not very effective. In ordinary diode , the semiconductor material itself attracts a lot of energy and an end. Light-emitting diodes covered by a plastic bulb lighting concentrated in a particular direction .
Price semiconductor components have been drastically reduced over the past 10 years, I believe the future of light-emitting diodes in a wider range of applications and is a more cost-effective lighting options .

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