Needless to say, the use of high brightness LED lighting will become the main feature of the future of the car, which is due to the advantages of LED compared with the traditional incandescent lighting program has a lot of basic advantages. In addition, the use of LED lighting can also lead to changes in the automotive design technology and design style. However, like any innovative technology, LED is widely used in automotive lighting, still need to overcome many difficulties.

Key features

1 reliability and service life

LED is expected to use life of 50000 hours, while the halogen tungsten lamp for 20000 hours, tungsten incandescent lamp for 3000 hours. Compared with the incandescent lamp, the structure of LED is strong, and it is not easy to be affected by vibration, and the output brightness of the light will not be decreased obviously. Based on multiple LED of the lighting scheme also has the "redundancy" benefits, even if a LED failure, still can continue to use the lighting device. Correct use of LED (especially the correct control of LED), can effectively extend the life expectancy of LED. On the contrary, if the temperature is too high, LED is easy to damage. LED application in automotive lighting also involves many legal issues. Most of the countries of the brake light or headlight failure -- lights on or off clearly defined. But for the use of multiple LED lights, it is difficult to accurately define whether the lamp has been damaged. Manufacturers and legislative bodies are defining the use of LED.

Efficiency / 2 lumens per watt

Compared with the standard incandescent lamp, LED consumes more light output per unit of electricity. But compared with halogen lamp, the actual optical output of LED is not obvious. The latest LED with excellent lumens per watt numerical, but some numerical is the optimization conditions, but usually not in under the condition of maximum output obtained the. Generally speaking, when the current of LED increases, the output of the optical output is not linear. Therefore, even if the LED x output lumens at 0.5A current, it is not at 1.0A current output 2x lumens.

3 response speed

With brake lights and direction indicator light tube as an example, if the vehicle speed of 125 km / h, 35 m / s, the hot start time of incandescent lamp is about 250 milliseconds, and the reaction speed of LED can be about 8 meters away from the brake warning, so as to avoid car collision. Indicator light.

4 direction

Another key feature is the LED of the light. Unlike incandescent lamp, such only through a light emitting surface, which the headlights and charts the application of light is good, but may not suitable for compartment lights other lighting applications