Tell-tale staining on failed car lamps
Those of you who have replaced failed car lamps in the past probably remember strange stains on the glass. For one, there’s a black, often opaque layer inside the glass bulb. It mainly occurs in smaller signal lamps, so basically the ones for rear lights, license plate lights and indicators. The deposit also has a metallic shimmer depending on the angle you’re looking at it. And that explains how it developed.
We’re talking about tungsten, a metal the filament in the lamp is made of. During the course of its hopefully long life, some of it vaporizes from the surface of the spiral wire which is only a hundredth of a millimeter thick; after all, it reaches a temperature of well over 2000 degrees. And because the “vapor” can’t escape from the lamp it is deposited on the inside of the glass, where it produces a black layer.
The vaporized tungsten is then missing from the filament, which will get thinner and thinner with time and will eventually burn out.
It’s somehow reassuring if your car does a great deal of thinking for you. It regulates the climate inside the car, controls the brakes, and lets you know if there are any technical problems. Unfortunately quite a few people switch off completely because of that, and don’t even bother with the smallest things that still need to be done manually in most cars. Steering, accelerating and braking (still) have to be carried out by the driver. And what if it gets dark outside? We turn on the lights, don’t we? Of course. But very clearly not everyone does.
Osram development opens up new design options.
OLEDs are the next big thing in car lights. And the next even bigger thing are flexible OLEDs. In a rear light jointly developed by Audi, Hella and Osram they’re showing the world what this technology is all about.
OLEDs are confusing to some people. Although three out of four letters are identical to the now pretty much classic LED, they have different technologies. But both produce light from semiconductors. The whole thing is getting a bit complicated though, because there’s a difference between normal (rigid) and flexible OLEDs.
Once again, beautiful Switzerland was the center of attention in Central Europe, even though the country likes to stay out of a lot of things. But this doesn’t include the tuning scene. That’s why around 12,000 people gathered once again on the weekend of July 2 and 3, 2016 near Geneva to take part in an impressive supporting program and show what they’ve got. And what they can do. And what moves them. The big 10-year anniversary party for the tuning event was a varied and boisterous affair, with the Osram team of course being in the thick of things again.