Vehicle LED lighting technology and status quo

Vehicle LED lighting technology and status quo

Along with the global economy development and the improvement of people's living standard, the car in daily life, so cars use more and more energy saving and emission reduction and train operation safety requirements is increasing day by day. Automotive lighting system is the guarantee safe driving car key components of the light source, and the key automotive lighting system. Light emitting diode (LED) as the fourth generation of car light source the characteristics of long service life, low energy consumption, low volume small, fast response, the monochromatic sex good, and many other advantages and adapted to the future of the car safety, energy saving, compact, fashion trend of development. To believe that with the auto industry maturity and LED chips, packaging, thermal technology rapid development of LED lighting system in the car, the application will be more and more wide, scale will be more and more big.

1 The feasibility of vehicle LED lighting and advanced

In the car use lighting source started about the beginning of the twentieth century. The first to use kerosene lamps and acetylene Lamp in 1910 and started to use electric light source, has undergone the incandescent Lamp, halogen tungsten Lamp and high Intensity Discharge type gas Lamp HID (Intensity Discharge Lamp), since 1985 into the vehicle Lamp LED era. At the same time LED lamp used in Adaptive according to System before AFS (Adaptive Front Lighting System) technology appears.
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2 Car driving circuit of LED lighting

LED to belong to current control type semiconductor devices, figure 1 is LED the volt-ampere characteristics of curve. The figure 1, the curve that is steep, in general is guide LED almost no current flow through before; When the forward voltage, current voltage over open has accelerated, and shine brightness L and positive current IF approximate proportional to: L = KIF, among them, the ratio K as can be through the control of LED to control the light IF brightness. Therefore, in order to ensure the consistency of its brightness, usually by constant current source driver circuit.
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3 LED car headlamps

As the car headlamp in driving safety plays an important role, so LED headlamp is the most difficult and final put into use. Previously, LED headlamps used only in concept car, LED lighting technology as well as the car with the development of industry, LED headlamp application already from concept car, luxury car to midrange car models, and even general transition lighting luminous intensity has reached the level of incandescent lamp.
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4 Vehicle LED lighting and the problems facing the measures

Vehicle LED lighting technology as a breakthrough of the new technology has significance has been most of the car manufacturers and consumers accept, more and more upscale cars are equipped with LED lights. But because of the special requirements of automotive application environment to really achieve vehicle LED light source, and instead of traditional many technical difficult problem to solve.
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5 Automotive market outlook LED lighting

LED lighting system in car the application although just start, but with semiconductor lighting technology and the rapid development of auto industry, LED the overall efficiency vehicle lamps and lanterns and ratio will be greatly improved, the application will be gradually expand the scale, and eventually the whole car lights up the market.
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