Matrix headlights- one of the design options for LED headlights (not in vain Audi company, one of the first to implement this solution, calls it Matrix LED). The light sources are still the same, but the important difference is how the work of these sources is organized.
In descriptions matrix optics the emphasis is often placed on the number of LEDs - for example, 24 diodes work in each of the Mercedes Multibeam headlights, and in an improved version that will be presented to the public along with the new generation of the E-class, there will already be 28 of them. However, in the "ordinary" LED headlights, the number light sources can easily be several dozen. For example, on a relatively affordable Audi A3, nine "LED chips" are responsible for the dipped beam, and high beam- ten LEDs. When talking about matrix headlights, you need to pay attention not so much to quantity as to quality.
"Simple" LED optics reproduces the structure known to us from our grandfather's Zhiguli: as before, there are separate blocks of position lights, high and low beams - just outdated bulbs have given way to diodes. The transition is no longer about a simple choice between near and far, but about creating a dynamic light pattern that constantly adjusts to the traffic situation. IN Headlamp Matrix LED, the usual division by type of light exists - but you can turn on, dim or turn off not only a separate block of diodes (of which there are five in each pair), but also each individual LED. As a result, electronics has many options for near and far. There is a lighting scenario for almost all occasions - after all, the number of available combinations is approaching one billion!
Matrix headlights have recently begun to appear even on relatively affordable models - one of these recently became the Audi A4 family.
It is easy to guess that in order to realize all the possibilities of matrix headlights, firstly, complex control electronics are needed, and secondly, a system of devices that read information about road conditions- sensors, video cameras and even a navigation system that will warn you about approaching a turn and tell you about its configuration. So, this newfangled optics is an expensive thing. And if in the price list in the corresponding column there is a relatively humane amount, then, if necessary, at your own expense, you can quickly change the headlight broken in an accident, it may not be so, maybe the antediluvian halogens are bad ... No wonder newfangled optics one of the first came to our heading with the telling title "Counted - shed a tear." Can you guess how much it will cost to replace a pair of headlights? Correct answer .
P.S. Over the past year and a half, we have already answered 48 simple questions(their full list) - and we don't want to stop. You can still leave your questions in the comments - and we will continue to look for answers.
Leading position in the field of lighting technology belongs to Audi. Since 2013 year Audi installs matrix headlights (Matrix LED headlights) on its flagship model - Audi A8. Matrix headlights raise to new level safety traffic and driving comfort. A pilot project of matrix headlights (Matrix Beam) is being developed by Opel.
The matrix headlight from Audi combines a matrix high beam module, a low beam module, a module for daytime running lights, position lights and a turn signal module, a headlight design surround, an air duct with a fan and a control unit.
High Beam Module consists of 25 LEDs, combined in groups of 5 pieces and together forming matrix. Each group has its own reflector and a metal radiator for cooling. With the help of a matrix of LEDs, about one billion different combinations of light distribution are realized.
Low Beam Module located under the headlight high beam module and consists of 15 LEDs divided into several segments. At the very bottom of the headlight there is a module for daytime running lights, position lights and a direction indicator. Structurally, the module includes 30 serial LEDs.
The location of the lighting modules is emphasized by the design frame. In the matrix headlight is located and the electronic unit management. For forced cooling LED headlight is equipped with an air duct with a fan.
All structural elements Matrix headlights are placed in a plastic case, which serves as the basis for placing the elements and protects them from external influences. From the front, the case is covered with a transparent diffuser.
Matrix headlights have electronic system control, which traditionally includes input devices, a control unit and actuators. The input devices are a video camera and a number of sensors. The camcorder provides information about other vehicles on the road. In the interests of matrix headlights, many sensors of other vehicle systems work: steering wheel angle sensor, speed sensor, sensor ground clearance, light sensor, rain sensor .
If there is a navigation system in the car, route data (traffic pattern, road relief, settlements) are used to control the matrix headlights.
The electronic control unit processes information from input devices and, depending on traffic situation activates (deactivates) certain LEDs. It should be noted that the matrix headlights do not use rotary mechanisms, as in xenon headlights. All operating functions are performed by electronics and static LEDs.
Matrix headlights have several lighting functions:
- polysegmental high beam;
- high beam for motorway;
- passing light;
- static adaptive lighting;
- intersection lighting;
- all-weather lighting;
- illumination of pedestrians;
- dynamic adaptive lighting;
- dynamic direction indicators.
Polysegment high beam allows you to move with a constantly on high beam headlights The main beam of the headlight consists of 25 individual segments (according to the number of LEDs).
When moving in dark time day the video camera detects oncoming and passing cars by their illumination. As soon as a vehicle is detected, the control system turns off the LEDs that illuminate the vehicle. The rest of the road is fully illuminated. In addition, to avoid dazzling other drivers, the brightness of the on LEDs can be reduced. Matrix headlights can mask up to 8 cars at the same time.
High beam for motorway traffic implemented upon receipt from navigation system information that the vehicle is moving on a motorway. The headlight control system narrows the light cone of the high-beam headlights, which corresponds to this type road and traffic.
dipped headlights has a traditional asymmetric shape: the middle part is less illuminated, the roadside is illuminated more.
Static adaptive lighting It is designed to better illuminate the area in front and on the side of the car when making a turn. To do this, three LEDs are used in each of the headlights, which turn on when the steering wheel is turned or the direction indicator is turned on.
Crossroad lighting function serves to better illuminate the approaching intersection. The approach of an intersection is determined by the navigation system, after which the static cornering light LEDs in both headlights turn on.
When driving in bad weather conditions(snow, fog, rain) used all-weather lighting function. It avoids blinding the driver from the light of their headlights. Pressing the corresponding button dims the dipped beam headlights and turns on the static cornering light LEDs in both headlights.
Matrix headlights capable in the dark illuminate pedestrians and animals located on the road or dangerously close to it. To do this, the headlights are combined with a night vision system. When a pedestrian is detected, the headlights flash high beam three times, warning both the pedestrian and the driver.
When the high beam headlights are on, the dynamic cornering lights. When the steering wheel is turned, the brightness of the high beam light beam is transferred from the central part to the direction of the turn by changing the brightness of the LEDs.
Dynamic turn signal represents the controlled movement of the lights in the direction of the turn. To implement this function, 30 consecutive LEDs are turned on in sequence with a frequency of 150 ms. According to the manufacturer, the dynamic direction indicator significantly increases the information content of the car's lighting system.
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It is currently difficult to keep track of the development of technologies in the segment of the automotive lighting market even for experts, not to mention ordinary average motorists. Yesterday, xenon, for example, was considered the coolest, but then the auto world started talking about LED headlights and, suddenly, car companies are switching to matrix headlights. Before an oncoming car blinds you laser optics let's try to figure something out.
What are matrix headlights
In general, this is one of the types of headlight design with diode filling. By the way, everyone famous company Audi was one of the first to introduce this decision into their models, calling it - Matrix LED. The light sources remain the same, but an important difference is the organization of the work of these sources.
When reading the characteristics of matrix headlights, the manufacturer often focuses on the number of LEDs involved. For example, each Mercedes Multibeam headlight contains 24 working diodes, and the upgraded version, which has found use on the new Generation E-Class, already has 28 diodes. Although it must be said that in conventional LED optics, the number of such diodes can reach several tens. Take a relatively affordable Audi model A3 - nine "LED chips" here are responsible for the low beam, and the far beam is on the conscience of ten LEDs. If you take into account the matrix headlights, then you need to pay attention not so much to the number of diodes, but rather to their quality.
Matrix headlight device
Take the "simple" LED optics - it reproduces the design that drivers know from the "Zhiguli" left over from their grandfathers. The headlight, as before, consists of separate blocks: low beam, high beam, parking lights- only the outdated light bulbs were replaced by modern LEDs. Moreover, if you switch from low beam to high beam, then we are not talking about the usual choice, but about creating a dynamic light image that constantly adjusts to road conditions (situation).
The division into near / far, which is familiar to the driver, can be found in the Matrix LED matrix headlight, but we add that you can turn off, turn on and mute here as a separate block of LEDs (by the way, each pair contains five pieces), and each LED separately. Therefore, it turns out that the electronics has many options for setting the high and low beams. An individual light option can be selected for absolutely all occasions, since the number of available is approaching a billion!
Price - lack of matrix headlights
Recently, matrix headlights are increasingly appearing in equipment relatively available cars and, such an example can be called a whole family.
To realize all the possibilities of matrix headlights, it is necessary to have: firstly, complex control electronics, and secondly, a set of devices that read information about road conditions (video cameras, sensors) and even a navigation system that will warn the computer if the car is approaching a turn, and also "tell" about the configuration of the latter. Therefore, such a newfangled thing as matrix headlights is quite expensive.
And if you see in the price list opposite the desired product (matrix headlight) it costs relatively democratic price, then for sure, if necessary, replace at your own expense a headlight broken during an accident, it will quickly come to your mind that antediluvian halogens are not so bad ...
In conclusion, let us add that soon we will tell you how much it can cost a driver to replace a couple of matrix headlights. As before, you can ask your questions, and we will always answer them.
So, we are talking about fog lights in the corners front bumper, which light up one at a time depending on the turn of the steering wheel and thus illuminate the turn. It's not bad both in the parking lot and driving at night on a winding road. The tests of turning headlights did not leave an unequivocal opinion among Consumer Reports experts, so experts suggest that consumers decide whether they need such a paid option.
XENON
Xenon headlights are a sore subject for Russian consumers. Too many drivers had to deal with the so-called collective farm xenon, which blinds oncoming lane and causes a sea of negative emotions, and it shines worse than regular xenon.
HID headlights are optics that use xenon gas. Even lensed headlights are not enough to install xenon, because if the headlight was not originally designed for xenon installation, the heating parameters, size and brightness of xenon and halogen are not taken into account.
But American experts still analyzed the "correct" standard xenon. First conclusion: due to more low temperatures such lamps, but at the end of their replacement will cost much more. But in general, specialists did not see any special advantages over good halogen optics.
LEDS
The headlights, which the manufacturer calls LED, can be light-guide - when a pair of diodes in the tubes are lit, filling them with light, and LED - when the entire line is burning diodes. Light guides are mainly used in rear lights due to lower cost.
The history of automotive lighting began with acetylene torches and conventional electric lights and technology has come a long way since then.
LEDs have many advantages: they have a higher luminous efficiency, high mechanical strength and vibration resistance due to the absence of incandescent lamps, long term services, they do not require time to warm up to full brightness, they are . Therefore, in the automotive industry, they are becoming more common with the release of each new model. But not cheap.
LEDs are actively used for that very “family” optics pattern. However, full LED headlights aimed at illuminating the road could be both very good - S-Class, and "blinder" halogens - on Seat Leon, For example.
MATRIX LED HEADLIGHTS
Matrix LED headlights are the next step. Moreover, it is also available for the mass segment, since they already appear on golf-class cars. located in the headlight units more than a dozen LED segments that are responsible for daytime running lights, near and far beam and side illumination by adjusting the intensity luminous flux, directions and turning off in groups as needed, for example, so as not to blind oncoming people. Cameras and sensors help you navigate, “spotting” an oncoming or passing car.
matrix led light very good, but very expensive. By the way, it is banned in the USA. But xenon was not immediately legalized there.
LASER LIGHTS
Laser headlights are the latest trend, available only in premium for obscene money. In fact, such light is only offered on the BMW i8 and Audi R8 so far, new generations are on the way. Audi sedans. It is no coincidence that engineers started with sports cars - laser lights they shine forward 600 meters, which is important when moving fast.
Blue laser beams falling on special plastic, with the help of a micromirror (Bosch) are converted to white, which illuminate the path. At low speeds, the headlights illuminate the road in breadth, and at high speeds, they “beat” forward. According to manufacturers, compared with matrix LED headlights"lasers" have greater dynamic resolution and better illuminate objects in the dark. In the US, this technology is not yet allowed by law.
