LED is widely used in the field of lighting constraints

In the past two years, more and more LED lamps are used in automobile design, which makes the appearance of the car more modern. The new generation of Audi A4 headlights in the group to increase the LED headlights elements, highlighting the fashion but also indicates that the use of LED lights is a major trend in the future design of Audi. But for the majority of models, LED lights are still used in most of the car taillights, while in the headlights, steering lamp is still very little, there are still a number of key technical problems to be overcome.

First talk about the advantages of LED lights. LED is the abbreviation of light emitting diode, it is a kind of solid state semiconductor, can directly convert electricity into light. The utility model has the advantages of high reliability, long service life, high lumen per watt, fast response speed, etc.. LED life expectancy is 50 thousand hours, and the tungsten halogen lamp for 20 thousand hours, ordinary incandescent lamp is 3000 hours; it is strong, not easily affected by vibration, the same power can produce more light output; when the vehicle speed is 125km/h (35 meters seconds), the rapid response of the LED brake lights early about 8 meters from the brake warning, effectively avoid the accident. However, some problems which are difficult to be solved properly restrict the development of LED lamps. The biggest challenge is the key problem and the problem of self heating LED, LED most of the electricity are converted into heat instead of radiant heat, and can not be good for interior lighting, more important is the heat causes the LED semiconductor temperature is too high, it is easy to damage; at the same time, there is no lumen LED lamp with the same current the electricity that is used many times growth will not be too bright is more obvious; and the LED light irradiation has obvious directivity, breadth enough ambient temperature; the LED lamp of the same great, so the heat management of it is the most fundamental problem to be solved, which relates to the current components, especially the control and the management of the thermistor, the linear current control is the key of LED can be normal and safety work. LED will change the color with the temperature and current changes, which may affect the night vision and distance judgments; current frequency may even lead to frequent flashes of light. At the same time, most of the countries and automotive lighting related laws on LED lights and not much support, but also limits its development. Indubitability, using high brightness LED lighting will become one of the important future direction of the car, completely solve the existing difficulties in technology, LED will be widely used in automotive lighting.