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Look! The working principle of LED lamp

  • Author:Angelia
  • Source:www.diecastingpartsupplier.com
  • Release on :2017-06-19
With the progress of the times, many things in life are brought about by the convenience of science and technology, bringing convenient and efficient life to people. Now life is full of high technology. The knowledge of mankind will grow greatly. Today, our unexpected new inventions will happen again and again. Sometimes I almost regret that I was born too early to know what is going to happen. Hi tech is like a messenger of reality and the future. It guides people to explore new space and develop a dynamic new world. aluminum cast manufactory

LED (Light Emitting Diode), a light-emitting diode, is a power can be converted into visible light solid-state semiconductor devices, it can be directly into electricity into light. The heart of the LED is a semiconductor chip, one end of the chip attached to a bracket, one end is negative, the other end connected to the power of the positive, so that the entire chip is encapsulated by epoxy resin.

Semiconductor chip consists of two parts, part of the P-type semiconductor, in which the dominant hole inside, the other end is the N-type semiconductor, mainly electronic here. But when the two semiconductors are connected, they form a P-N junction. When the current through the wire acting on the chip, the electron will be pushed to the P area, in the P area with the hole in the electronic composite, and then will be issued in the form of photon energy, which is the principle of LED light. And the wavelength of light is the color of light, is formed by the formation of P-N knot material.

The initial LED used as instrumentation indicator light source, and later a variety of light color LED traffic lights and large area display has been widely used, resulting in a very good economic and social benefits. To 12-inch red traffic lights, for example, in the United States was originally used long life, low light performance 140 watts incandescent light as a light source, it produces 2000 lumens of white light. After the red filter, the light loss of 90%, leaving only 200 lumens of red light. In the newly designed lamp, Lumileds uses 18 red LED light sources, including circuit losses, including a total of 14 watts of electricity, can produce the same light effect. Automotive lights are also important areas of LED light source applications. aluminum die casting parts

For general lighting, people need a white light source. 1998 white LED development success. This LED is the GaN chip and yttrium aluminum garnet (YAG) made together. GaN chip with blue light (λp = 465nm, Wd = 30nm), high temperature sintered Ce3 + -based YAG phosphor is excited by this blue light after the yellow light, the peak 550nLED lamp m. The blue LED substrate is mounted in a bowl-shaped reflective cavity, covering a thin layer of resin mixed with YAG, about 200-500 nm. The blue part of the LED substrate is absorbed by the phosphor, and the other part of the blue light and phosphor yellow light mixed, you can get white.

For InGaN / YAG white LED, by changing the chemical composition of YAG phosphor and adjust the thickness of the phosphor layer, you can get the color temperature of 3500-10000K colored white light. This way through the blue LED white light, simple structure, low cost, high technology maturity, so the most use.

LED heaters are used when using LED lights. Now I want to recommend this product Aluminum Die casting LED Heat sink to you

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