Fashion: onlookers headlights LED technology revolution

2008, Audi equipped with full LED headlamps R8 roadster, is the industry's first. They are not only lighter than halogen and xenon headlamps, but also more efficient. However, this technology is not a new thing, and now B car can catch up with the fashion LED.

Matrix LED lighting technology

But Audi's engineers did not seem to stop the pace of innovation, they introduced matrix LED headlamps lighting technology in A8 luxury sedan, with 1 Hella bifocal lens. Matrix LED and the traditional way of lighting in different places that it put the beam into five reflective surface, a reflecting surface contains five LED light source control software, so get rid of dependence on mechanical beam deflector.

While driving at night, the whole matrix LED headlamps will use the high beam light source system, once the sensor to detect the front vehicles, will automatically adjust or shut down a number of LED single lamp group, let the light in front of the vehicle is not affected by interference.

Uwe P by Audi Seler is responsible for the lighting and visibility of the engineer, he told the author, "matrix LED technology can help us to control the light distribution better, in order to achieve good lighting effect". He also pointed out that the matrix LED light source is very close to Audi's definition of a good light source, because if you can always open the lights recklessly, everywhere there is light, it is definitely a good light source".

As with the front camera can detect the brightness changes in front of 300 meters within the scope of the current vehicle arrived from the car 200 meters position, immediately shut down parts of a single LED light source. And in front of the vehicle quickly passed, LED light source to resume normal work time by the driver's own control. For example, Sport and Comfort models corresponding to the induction distance of 900 m and 400 m.

In matrix LED light source spectral quality and standard LED lamp, the color temperature is 5500K, by contrast, xenon lighting system is only 3000K. The matrix LED is more efficient because in the absence of a single LED can be shut down, very energy saving. However, similar to the ordinary halogen, xenon or LED lighting beam angle, are maintained at +/-25 degrees. However, the LED deviation of the middle region is only 2 degrees, and the maximum deviation angle of the edge is about 8 degrees.

While driving at night, the road lighting is directly related to traffic safety, but also protect the matrix LED technology to the roadside pedestrians and large animal. Compared with the traditional camera data acquisition of the lighting windshield, far infrared night vision camera A8 by placing in the grille can be detected accurately data objects in front of the heat lamp control system for Autoliv. When a pedestrian or an animal is detected in the front, a specific number of LED monomers in the light group will be automatically aligned with the object to flash 3 times (below the head) as a reminder.

Matrix LED lighting technology can control the single diode, collocation Hella 1 double optical lens, A8 headlamps more intelligent

So how to prevent light fog? By using P Seler and his colleagues are still the process standard LED headlamps, active and passive ventilation will be fully combined.

P by Seler to the author explains, "when the car is stationary, the fan of car running, the hot air discharge lamp group, to quickly remove fog lenses. While in the car on the way, fresh air is directly injected into the same effect in addition to the effect of hot fog, to ensure the normal operation of the lamp. "

P by Seler also mentioned the need to package the 25 LED light source in the headlights and integrate all the functions, he had encountered the most challenging technical problems of. And to develop some regional markets, the relevant laws and regulations is also a very difficult problem.

"At present, in North America is unable to use this lamp technology. He said. "These areas require only a single light source, and we have 25 separate LED". Nevertheless, he still believes that the matrix LED headlight design will soon be officially recognized in North America, while Audi has also been in discussions with the relevant departments and negotiations.

P by Seler think this design is very helpful to the traffic safety, he believed that officials see the matrix LED technology brings great driving security and safety, will agree on this technology in the North American market.

But the buddies you made? Audi engineers have become on the road of innovation is not integrity! After the matrix LED lighting technology matures, they are ready to play the idea of laser diodes. But in fact, this technology has been the first laser headlamps BMW, and BMW said it will be in this year's mass production of I8 plug-in hybrid sports car using this manufacturing process. However, there is also a Audi hand nirvana, which is OLED (organic light-emitting diode) lighting technology, compared to the first two, this guy is a great benefit.

This material in the initial state is an absolutely flat on the plane (for example, a highly polished glass screen) stretched very thin paste, the coating thickness less than 0.01 mm. After power up, the molecules of the paste emit photons and the OLED plane is illuminated. By adjusting the distribution of power input, the lighting effect can be uniform, can also produce light and shade effects, and even dynamic effects. However, it is difficult to develop in depth, because unlike the bulb at home, it can be