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Headlights are like the eyes of the car, is an important configuration that can ensure the basic safety of everyone driving. From the most basic halogen lights, to advanced xenon lights, and then to the new force of full LED lights, and even laser headlights, car headlights after a generation of upgrades, the cost is getting higher, but the actual irradiation effect is not necessarily. Now the same model often by different light sources to distinguish between different configurations, we consumers in the car buying process how to choose it? These different light sources of headlights and what are the advantages and disadvantages? Today Wu Yue will talk to you about this topic.
Now many family cars with low models are halogen lights, and we are on the road the most common yellowing lights are generally halogen light source. It appeared the earliest, the technology is also relatively most mature, so its biggest advantage is the simple structure, cheap. And the biggest advantage of halogen lights is the strong penetrating ability, in fog, rain visibility is low, halogen light source penetration ability is much higher than other color temperature products.
The disadvantage of halogen lamps is also very obvious, is the limited brightness, and as the use of time becomes longer, the brightness will become increasingly dark, so that we often say "candle lights. The life span is relatively short, so we can often see a car on the road, a car light does not light up, so the lights are using halogen bulbs.
The original used in the senior car with xenon lamps, the principle is filled with high-pressure inert gas xenon in the quartz lamp, and then pass more than 20,000 volts of high-voltage electricity. The light emitted is whiter and brighter than halogen lamps, and longer life and less power consumption. However, the high cost of xenon lights, generally used in the senior car. But now xenon headlights are gradually replaced by LED headlights.
Five Yue often see some of the owners who bought a lower car will be standard halogen lights replaced with xenon headlights, which can indeed improve the brightness, but also improve the safety of night driving. But Yueh wants to remind everyone that the disadvantage of xenon headlights is that the lighting time is relatively long. And the need to install stabilizers. If you need to install xenon headlights in the case must be added lens. If you do not add a lens in the case of serious scattering, seriously affect the sight of the opposite car.
LED headlights is now the development trend of automotive light source, LED is light-emitting diodes, is a kind of electronic light-emitting devices. The use of solid semiconductor chips as light-emitting materials, through the carrier compound caused by photon emission and direct light. Its advantages are energy saving, fast response (lighting time of only a few subtle), high brightness, small size (can be arranged into a variety of cool shapes), long life (can be used for 6-10 million hours), etc.. And now many car companies use the characteristics of LED headlights small size, in the shape of the headlights to make articles, such as our common BMW "angel eyes", Mercedes-Benz "butterfly lights" and so on.
But the cost of LED headlights is still relatively high, so the general full LED headlights are only in the high-end models. And some low-end models, generally use LED as daytime running lights, while the headlight source is halogen. And LED lights in foggy weather, it is not as penetrating as halogen lights.
After LED headlights, laser headlights are called "the next logical step", which is more energy-saving and fuel-efficient. The principle is that the blue light of the laser light-emitting diode will run through the fluorescent phosphor material inside the headlight unit, converting it into a diffused white light that is brighter and more friendly to the eyes. Compared to LED headlights, laser headlights are even smaller, and the length of a single laser diode element can already be 10 microns. So if the designer wants, he can design the headlights of the car small enough. This also means that in the near future, the popularity of laser headlights may bring a new revolution in the field of automotive design.
Now the laser headlights are no longer a concept, the new BMW 7 Series and Audi A8L are equipped with laser headlights as standard on the high end models, and optional on the low end models. However, the high cost of laser headlights is also destined to appear only on high-end models at this stage.
Now with the progress of technology, car headlights are becoming more and more high-end, but no matter what type of car headlights we have on board, we have to use them reasonably. Accidents caused by improper use of headlights also happen from time to time, so when we meet at night, remember to switch to low beam and not to use high beam in well-lit roads. Be responsible for your own safety, and also for the safety of every participant in traffic behavior.
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