The headlights are like the eyes of a car, and are an important configuration that can guarantee the safety of everyone's basic driving. From the most basic halogen lamps, to the high-grade xenon lamps, to the new power full LED lamps, and even the laser headlights, the car's headlights have been upgraded from generation to generation, the cost is getting higher and higher, but the actual illumination effect is not necessarily . Now the same model often uses different light sources to distinguish different configurations. How do consumers choose the car purchase process? What are the advantages and disadvantages of these different light source headlights? Talk to everyone about this topic today.
Halogen lamp
Halogen lamps are used in low-profile models of many family cars, and the most common yellowing lights on the road are halogen sources. It appeared at the earliest time, and the technology is relatively mature, so its biggest advantage is that the structure is simple and the price is cheap. And the biggest advantage of the halogen lamp is that it has strong penetrating ability. In the case of heavy fog and low rain visibility, the penetrating ability of the halogen light source is far higher than other products with high color temperature.
The shortcomings of halogen lamps are also obvious, that is, the brightness is limited, and as the use time becomes longer, the brightness will become darker and darker, so that it becomes a "candle lamp" that people often say. The life is relatively short, so we can often be on the road. I saw that some of the lights of some cars are not lit. Such lights are using halogen bulbs.
Xenon headlights
Originally used in mid- to high-end cars is a xenon lamp. The principle is to fill the quartz tube with a high-pressure inert gas, and then apply more than 20,000 volts of high-voltage electricity. The emitted light is whiter and brighter than the halogen lamp, and it lasts longer and consumes less power. However, xenon lamps are costly and are generally used in mid- to high-end cars. But now Xenon headlights are gradually being replaced by LED headlights.
It is often seen that some owners who bought a low-end car replaced the standard halogen lamp with a xenon headlight, which really improved the brightness and improved the safety of driving at night. But to remind everyone that the shortcoming of Xenon headlights is that the lighting time is relatively long. And you need to install a stabilizer. If you need to install xenon headlights, you must add a lens. If the lens is not installed, it will cause serious scattering, which will seriously affect the line of sight of the opposite car.
LED headlights
LED headlights are the development trend of automotive light sources. LEDs are light-emitting diodes and are an electronic light-emitting device. A solid semiconductor chip is used as a light-emitting material, and photon emission is caused by recombination of carriers to directly emit light. Its advantages are energy saving, fast response (lighting time is only a few microseconds), high brightness, small size (can be arranged in a variety of cool shapes), long life (60-100,000 hours can be used). And now many car companies use the small size of LED headlights to make a fuss about the shape of the headlights.
However, the cost of LED headlights is still relatively high, so generally all LED headlights appear only in mid- to high-end models. For some low-end models, LEDs are generally used as daytime running lights, while headlight sources are halogen lamps. And LED lights in foggy weather, its penetration is not as good as halogen lamps.
Laser headlight
Following the LED headlights, the laser headlights are called "reasonable next steps", which are more energy efficient and more fuel efficient. The principle is that the blue light of the laser light-emitting diode will pass through the fluorescent phosphor material in the headlight unit, converting it into a diffused white light, which is brighter and more friendly to the eyes. Compared to LED headlights, laser headlights are much smaller, and the length of a single laser diode component can already be 10 microns. So as long as the design is willing, you can design the car's headlights 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.
Nowadays, the laser headlights are no longer a concept. The new BMW 7 Series and Audi A8L models are equipped with laser headlights as standard, and low-profile models are also available. However, the high cost of laser headlights is also doomed to be present in high-end models at this stage.
summary:
Now with the advancement of technology, the car's headlights are getting more and more high-end, but no matter what type of car headlights we have on the car, we must use them reasonably. Because accidents caused by improper use of car headlights occur from time to time, we must remember to switch to low beam lights when we are at night, and do not use high beam lights on well-lit roads. Responsible for their own safety and for the safety of each traffic player.