We all say that the eyes are the windows of the soul, so for the car, having a pair of beautiful headlights, it seems to have a pair of beautiful eyes and hearts. As the saying goes, "Yan value is justice" LED headlights appear to be like the "beauty" of the headlights, adding a lot to the car. However, besides the beauty, do you know what the LED headlights are all about?
What is LED
In life, we often have access to the three letters "LED". Whether it is mobile phones, TVs, chandeliers, etc., LEDs can be seen everywhere. What exactly is LED? Let Xiaobian give you a answer.
LED (English: Light-Emitting Diode), also known as a light-emitting diode, is a semiconductor electronic component that converts electrical energy into light energy. This kind of electronic component appeared as early as 1962. In the early days, it only emitted low-light red light. Later, it developed other versions of monochromatic light. The light that can be emitted today has spread all over visible light, infrared light and ultraviolet light, and the luminosity has increased to equivalent. The luminosity. The use is also used as an indicator light, a display panel, etc.; with the continuous advancement of technology, LED has been widely used in displays, television lighting decoration and lighting. It is also an important component of automobile taillights, headlights, high-position brake lights and daytime running lights.
LED advantages
Since talking about LED, we must first talk about it now. It is good to know that there are three kinds of mainstream headlights on the car: halogen headlights, xenon headlights and LED headlights. What are the advantages of LED headlights that are gradually emerging compared to the first two types of headlights?
1. Energy saving and low cost: LED has high luminous efficiency, which is nearly twice that of fluorescent lamps. If we use our daily energy-saving lamps to compare, energy-saving lamps are 80% more energy efficient than incandescent lamps, and LEDs are 25% more energy efficient than energy-saving lamps. In the car, the same daytime running lights, LED components consume only 5% of the halogen lamp. The cost of LED components has also dropped significantly year by year, and current costs and prices are still falling by more than 20% per year.
2, long life: the current LED components used in cars can basically reach 50,000 hours, and relatively advanced automotive lighting suppliers have been able to provide LED components with a life of up to 100,000 hours, the conversion is equivalent to 11 years . Considering the frequency of use of the lights, the LED components do not need to be replaced during the design life of the vehicle. In contrast, the life of the xenon lamp is only about 3,000 hours.
3, good durability: LED components are simple in structure, impact resistance, shock resistance is very good, not easy to break, can be well adapted to various environments.
4, LED components are small, compact and easy to arrange and design: This is a huge advantage of LED, this advantage fully meets the evolutionary needs of automotive manufacturers in design, breaking the shackles of the past lighting system for modeling innovation, let us have More creative car products.
5, fast response: LED lighting only needs microsecond level, can be quickly lit up on the taillights and turn signals to achieve better warning effect, used in the headlights, compared to xenon lamps and halogen headlights High response speed, better protection for driving safety.
6, low brightness attenuation: LED brightness is high, the light brightness attenuation is much lower than the halogen lamp, suitable for use as lighting and brake lights, turn signals and other warning lights.
7. Low-voltage DC can be driven, the load is small, the interference is weak, the requirements for the use environment are low, and the adaptability is good. There is no need for a booster like a xenon lamp.
LED application
The above is only the surface advantage of LED, but LED is not just a simple replacement for the light bulb, it can also be the ultimate in safety. The following small series will give an example, let everyone see what LED headlights can do what traditional headlights can't do. Mercedes-Benz's geometric multi-beam headlights believe that everyone has heard more or less. It can quickly and accurately adjust the headlights according to current road conditions and traffic conditions. The illumination can be turned on at any time with a separately controlled LED light when needed. Each of the headlights' 84 LED lights ensures optimum road lighting, ensuring that the lights are always turned on when needed. Using the information provided by the camera located behind the windshield, the four control units are able to calculate the ideal light pattern at 100 times per second.
Adaptive high beam
For example, when the high beam is turned on, the enhanced high beam assistant system enhanced version always provides the most suitable high light range. The driver is able to concentrate on traffic conditions without having to switch between low beam and high beam. Through a stereo camera located behind the windshield, the system can identify the incoming or forward vehicles that are driving the lights on, and automatically adjust the headlights based on current road conditions and traffic conditions. The LEDs of the high beam module are partially turned off, each forming a U-type dim mode. The high beam will continue to illuminate other areas of the road (part of the high beam).
Country and highway modes, highway high beam lights and some high beam lights on the highway
Compared to traditional low beam lights, the country road mode brightens and effectively illuminates the curb on one side of the vehicle, giving the driver a better view and reacting more quickly. When the system recognizes that it is driving on the highway, the optical path will change – the driver's visible distance is increased by about 50 meters compared to the traditional low beam. If the Adaptive High Beam Assist Plus is turned on and the High Beam is enabled, the system will select the best high beam mode for highway conditions. This reduces the risk of glare to oncoming vehicles while keeping the driver's attention focused on the lane in which they drive. The high beam function of the expressway is activated according to road conditions and traffic conditions, and the special dark light mode is used to avoid dazzling other road users.
Active lighting
Active lighting means that the headlight beam can be turned into a corner to provide better road illumination. Preventive turn detection is achieved when paired with lane aids. The active lighting function illuminates the curve before turning the steering wheel and before turning out again. This will detect the danger ahead of time.
Corner lighting function and corner lighting function with a circular cross function
Additional LED light sources in the headlights improve road lighting during cornering or sharp turns at night. When a specific steering angle is reached, the corner light on the corresponding side will automatically turn on. In addition, the corner light function is enabled when reversing or turning on the turn indicator at a speed of less than 40 km/h. Enable and disable operations into a smooth dimming process. This allows the corner illuminator function with a circular crossover function to be activated before entering various loops. In this way, the driver can recognize earlier that a pedestrian crossing or cycling is approaching a potential hazard.
Enhanced fog light function
The enhanced fog light function is activated when the vehicle speed is below 70 km/h and the rear fog light is on. This feature allows the headlights on the driver's side to be turned 8 degrees outward and reduce the beam height. This illuminates the outer half of the lane more effectively while reducing the glare caused by the fog reflecting the light. The enhanced fog light function remains on when the vehicle speed does not exceed 100 km/h.
Written at the end
Many people mentioned that LEDs didn't take it for granted because they felt that they only had the advantages of energy saving, low cost, and durability. However, LEDs can effectively protect your driving safety compared to other light sources. No one can say "don't care". It turns out that LEDs are widely recognized and not unreasonable.
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