LED products have set off a green storm of energy conservation and environmental protection around the world, and have been hailed as “green lighting†products by the industry. Today, with increasing energy consumption, some even predicted: "In the next 10 years, LED products will become the only products that replace traditional lighting fixtures such as high-pressure sodium lamps, incandescent lamps, and fluorescent lamps."
The LED tubes we usually see are in various forms, dazzling and fascinating. It is very beautiful. How did this little thing be produced?
The main components of LED lighting products are: LED light-emitting diodes, PCB circuit boards, and outer casings. These three materials constitute the main body of the lighting products, and basically determine the material quality of the lighting products.
The LED industry has recently experienced rapid development in the world, especially decorative lamps, which are widely used in municipal lighting projects such as building contours, bridges and plazas, as well as entertainment venues such as hotels, KTVs, hotels and amusement parks. The main components of LED lighting products are: LED light-emitting diodes, PCB circuit boards, and outer casings. These three materials constitute the main body of the lighting products, and basically determine the material quality of the lighting products.
The following is a brief description of the impact of the selection of three materials on lighting products.
1, LED light-emitting diode
The brightness of the LED is determined by the brightness of the LED chip and the shape of the lamp package. Its lifetime is determined by the working environment and quality of the LED chip. It should be specially noted here that the standard size of LED chips used in LED lighting products is generally: red, yellow 12mil, blue, green 14mil, but also 8-10mil chip. Different sizes of chips can have the same brightness, but their lifetime is completely different, because the larger the over-power of the chip per unit area, the shorter the life, which is why the price of the same brightness LED is not the same.
2, PCB circuit board
The life of the luminaire and the failure rate of the board directly affecting the carrier of the light source. All electronic circuits of LED lighting products are on the PCB circuit board, and its material and processing technology will directly affect the quality and life of the product. The board material is divided into three types: full glass fiber, semi-glass fiber and cardboard. The standard material for LED lighting products should be full-glass double-panel. If semi-glass or cardboard single-panel is used, the quality of the welding and moisture resistance, anti-aging ability and electrical properties will be greatly reduced.
3, the outer shell
The outer casing acts as a light-mixing layer and protective layer for the luminaire product, which also affects the effect and life of the luminaire product. The engineering materials used today are generally PC (polycarbonate), which has the best anti-aging, anti-UV and anti-shock effects. Also useful as PMMA (acrylic), its weatherability is slightly worse, and brittleness is more brittle. The PC material itself is colorless, and PC tubes of different colors can be processed by adding different toners as needed. Generally, PC tubes are commonly used in both transparent and opalescent. The transparent tube is brighter than milky white, but the milky white color mixture is superior to the transparent tube.
LED lamps adopt a solid-state light source, and their life depends mainly on the solid-state LED light source and the heat-dissipating part. At present, the life of the LED light source has reached more than 100,000 hours. With the continuous development of LED technology and the widespread use of application technology, driving and heat dissipation The aspect is basically in an ideal state, and the life expectancy of high-quality LED spotlights reaches 10,000-50,000 hours.
LED application examples
(1) Display, communication number display light source application LED light has the characteristics of shock resistance, light response speed, power saving and long life. It is widely used in various indoor and outdoor displays, which are divided into full color and three colors. And a monochrome display. Traffic lights mainly use ultra-high brightness red, green and yellow LEDs, because the use of LED signal lights is not only energy-saving, traffic lights are gradually being updated, and the promotion speed is fast.
(2) Applications in the automotive industry Automotive lights include dashboards, audio indicators, backlights for switches, reading lights and external brake lights, tail lights, side lights, and headlights.
(3) LED backlights are most attractive for high-efficiency side-emitting backlights. LEDs are used as LCD backlights with long life, high luminous efficiency, no interference, and high cost performance. They have been widely used in electronic watches, mobile phones, and BP. On the machine, electronic calculator and credit card machine, with the increasingly miniaturization of portable electronic products, LED backlights have advantages, so backlight production technology will develop toward thinner, lower power consumption and uniformity.
(4) LED lighting source The early products have low luminous efficiency, and the light intensity can only reach several to several tens of mcd. It is suitable for indoor applications, and is applied in home appliances, instrumentation, communication equipment, microcomputers and toys. At present, the direct target is to replace incandescent lamps and fluorescent lamps with LED light sources. This alternative trend has been developed from the local application field.
(5) Other applications such as a flashing shoe that is popular with children, the built-in LED will flash when walking; use LED as the power indicator of the electric toothbrush; the popular LED Christmas lights, novel, colorful, not fragile Breakage and safety for low pressure use.
LED has become one of the most promising high-tech in the world in recent years, officially kicking off the comprehensive replacement of traditional lighting, semiconductor lighting technology innovation is changing the history of traditional lighting for a hundred years.
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