LED on key issues before the widely used

  
Nearly two years of automotive design, LED lights use more and more increase in the automotive appearance, while modern, but also for more and more people are familiar with. A new generation of Audi A4's headlights group increases the LED lamp elements, highlighting fashion also indicates that the use of LED lights is the future design of an Audi trend. However, most of the models in terms of current, LED lights are still largely used in automotive taillights, while the former headlamps, turn signal on the use remains very low, during which there are a number of key technical issues remain to be solved.
      First it said that the advantages of LED lights. LED is the acronym for light-emitting diodes, it is a solid-state semiconductors, can be directly converted into electricity to light. Reliability of its strong, long life, high lumens per watt, fast response and so on. LED life expectancy of 5 million hours, while the halogen of 2 million hours of ordinary incandescent lamp is 3000 hours; it is rugged, less susceptible to shocks, the same power can produce more light output; when the vehicle speed of 125km / h (ie 35 m seconds), responsive LED brake lights can be about 8 meters ahead of a warning issued by the brakes, effective and avoid accidents.
     
      However, some hard to properly solve the problems have constrained the development of LED lights. The key issues and the biggest challenge is the LED self-heating problem, LED majority of electrical energy are converted into heat rather than the radiant heat conduction, and can not properly carry out interior lighting, more importantly, LED semiconductor conduction heat causes the temperature is too high, it is easily damaged; the same time, the lumen LED lights are not as current with the times of growth, which is more than power will not necessarily bright even more obvious; and LED light has a clear direction, breadth of exposure is not enough; the external environment temperature on the LED light impact is also huge, so its thermal management is the most fundamental issues to be addressed, which involves pairs of current components, in particular the thermistor control and management, current control is a linear LED can work properly and safely key. LED will change with temperature and current change color, may affect night vision effect and distance judgments; current frequency may even lead to frequent flashes of light. At the same time, most countries and automotive lighting-related laws LED lights, and do not have much support, but also limited its development.
     
      Needless to say, using high-brightness LED lighting will become an important development direction for the future of one of the car thoroughly solve the existing difficulties in the areas of technology, post-, LED lighting will eventually get in the car a wide range of applications.