Posts Tagged ‘headlightsdepot Review’

Audi A8 super high-tech headlights

Tuesday, January 21st, 2014

Highly effective: new turn signal light in the Audi A8

-Indicator LEDs light up sequentially in the turning direction
-Advanced turn signal light is a component of the Audi Matrix LED headlight

In the new Audi A8, the turn signal light consists of lighting elements that illuminate in a defined sequence; this makes it easier for others to perceive the driver’s turning intentions, even under difficult conditions.

In the new Audi A8, the turn signal lights will now indicate the turning direction in an innovative way, which has the potential to significantly enhance traffic safety. That is because the lights provide a visual signal that can be clearly and quickly perceived, even at long distances and in poor visibility.

Each of the enhanced headlights contains18 light-emitting diodes arranged in a strip that is subdivided into seven blocks. Each tail light contains 24 LEDs in eight segments, which are used to dynamically indicate the turning direction. During flashing, the blocks are sequentially activated at 20 millisecond intervals, from the inside outwards in the desired turning direction. After 150 milliseconds, all segments are bright; for another 250 milliseconds they illuminate with full intensity. Afterwards, the turn signals go dark before repeating the lighting sequence.

Considering their capabilities, the Audi Matrix LED headlights can be regarded as a cutting-edge innovation. In each headlight, 25 light-emitting diodes generate a highly variable high-beam light. When the on-board camera detects other vehicles ahead, the Audi Matrix LED headlights mask the relevant sections of the high-beam by dimming or shutting off individual diodes. Very bright illumination is preserved in the remaining zones.

The Audi Matrix LED headlights also feature navigation-based cornering lights and, in cooperation with the night vision assistant, a marker light that warns the driver of pedestrians in the dark and which also alerts the pedestrians.

Audi will be presenting the upgraded A8 in September at the IAA International Motor Show in Frankfurt.

Source: Auto Blog

Intel Developing Headlights?

Friday, January 17th, 2014

When computer hardware companies start getting involved with the development of automotive technologies, you can be sure some futuristic stuff is about to go down. How does invisible rain sound to you? Intel, along with Carnegie Mellon University, has come up with an idea for a new headlight system that can make rain seem to disappear from the driver’s direct line of sight.

According to CNET, the headlight uses a camera housed within the headlight assembly to detect rain (and presumably snow or hail) as it falls, and then it uses a processor to anticipate the path of the rain. Finally, the actual light is created by a projector, which uses the information supplied by the processor to block out the pixels where the rain is expected to be. This technology, as you can see in the image above, should help improve visibility since there will be less light reflected back at the driver by raindrops.

For now, the only way you can see this rain-cancelling technology is in a demonstration in the video report posted below, but Intel thinks that it could make its way into production within the next 10 years.

Headlight Care

Saturday, January 9th, 2010

Headlamp systems require periodic maintenance. Sealed beam headlamps are modular; when the filament burns out, the entire sealed beam is replaced. Most vehicles in North America made since the late 1980s use headlamp lens-reflector assemblies that are considered a part of the car, and just the bulb is replaced when it fails. Manufacturers vary the means by which the bulb is accessed and replaced. Headlamp aim must be properly checked and adjusted frequently, for misaimed lamps are dangerous and ineffective.[12]

Over time, the headlamp lens can deteriorate. It can become pitted due to abrasion of road sand and pebbles, and can crack, admitting water into the headlamp. “Plastic” (polycarbonate) lenses can become cloudy and discoloured. This is due to oxidation of the painted-on lens hardcoat by ultraviolet light from the sun and the headlamp bulbs. If it is minor, it can be polished out using a reputable brand of a car polish that is intended for restoring the shine to chalked paint. In more advanced stages, the deterioration extends through the actual plastic material, rendering the headlamp useless and necessitating complete replacement. Sanding or aggressively polishing the lenses, or plastic headlight restoration, can buy some time, but doing so removes the protective coating from the lens, which when so stripped will deteriorate faster and more severely.

The reflector, made out of vapourised aluminum deposited in an extremely thin layer on a metal, glass or plastic substrate, can become dirty, oxidised, or burnt, and lose its specularity. This can happen if water enters the headlamp, if bulbs of higher than specified wattage are installed, or simply with age and use. Reflectors thus degraded, if they cannot be cleaned, must be replaced.

Headlamp. (2010, January 9). In Wikipedia, The Free Encyclopedia. Retrieved 19:23, January 9, 2010, from http://en.wikipedia.org/w/index.php?title=Headlamp&oldid=336759396