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What is the light-emitting principle of led lights?

Published by ADAYOLIGHTING 2024-03-28
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LED light is a piece of electroluminescent semiconductor material chip, cured with silver glue or white glue to the bracket, and then connected to the chip and circuit board with silver or gold wire, surrounded by epoxy resin seal, to protect the role of the internal core, and finally install the shell.

 

1. How do LED lights emit light?

Semiconductor wafers are composed of two parts, a P-type semiconductor in which holes dominate and a p-type material that is produced using elements with fewer valence electrons than the intrinsic material (usually silicon) (e.g., boron). 

At the other end of the spectrum are N-type semiconductors, which are mainly electrons on this side. n-type materials are made using elements that have more valence electrons than the intrinsic material (usually silicon), such as phosphorus.

However, when these two semiconductors are connected, a P-N junction is formed between them. When the current through the wire acting on this wafer, the electrons will be pushed to the P region, in the P region, the electrons and holes compound, and then will be issued in the form of photons of energy, which is the principle of LED lights.

 

 

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2. What determines the color of the LED?

The wavelength of light, also known as the color of light, is determined by the material forming the P-N junction. The material used to construct the LED determines its color.

In terms of energy band theory, the wavelength or color of the emitted light depends on the forbidden band or energy gap of the material, and different materials emit different colors of light. There are three widely used colors: red, green and blue. The different materials used to manufacture LEDs can produce photons with different energies, thus controlling the wavelength of light emitted by the LED, which is the spectrum or color.

The principle of soft white lighting, the production principle of RGB three-color synthetic white light This method combines the red, green and blue chips of LEDs together, and makes them emit red, green and blue base color light through electric current, and then mixes them into full-color visible light.

 

 

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HUIZHOU FORYOU OPTOELECTRONICS TECHNOLOGY CO., LTD

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