With the development of in-vehicle system technology, the display occupies more and more territory in the car interior, first the center console, then the instrument panel, and the next one to be occupied is the interior rearview mirror.
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At the Geneva Motor Show, which began last weekend, Nissan showed off a newly developed technology that was small but practical: a smart interior mirror with a widescreen LCD display. The display is connected to a camera mounted behind the vehicle to display the image monitored by the camera in real time.
Smart interior mirror
The camera can continuously capture the road condition behind the vehicle and transmit the captured image to the display in real time. Because it is mounted behind the vehicle, the camera has a wider field of view than the rear windshield, so the driver can see the original with the camera. Vehicles and traffic conditions at blind spots in the field of vision.
However, the display does not completely replace the rearview mirror. There is a button under the rear view mirror that allows the rear view mirror to switch between the traditional mirror and the LCD display. The driver can choose according to personal preference and traffic conditions.
Due to the shape of the rearview mirror, this LCD display does not use a conventional 4:3 or 16:9 screen, but a more special 4:1 display. To this end, Nissan chose a new 1.3 megapixel narrow-angle camera to match it. If a conventional camera is used, the picture transmitted to the rearview mirror will be stretched and deformed, and the final display resolution will be lowered, and the quality of the display will be poor, which is not conducive to the driver's judgment.
Rear view mirror display camera shooting screen
Compared with traditional mirrors, such smart rearview mirror systems have obvious advantages.
In general, the field of view seen by the driver through the mirror is limited to the field of view given by the rear windshield, and there is a blind spot of the field of view. In addition, when the passengers in the rear seat of the car are too high, or when the trunk is filled with large items and the trunk cover is closed, the use of the conventional rear view mirror will block the driver's line of sight.
The camera of the smart rearview mirror is mounted behind the vehicle and has an increased range, at least for vehicles with potential collision hazards. Moreover, it can be seen from the pictures released by Nissan that on the SUV model, the camera is mounted above the rear windshield. As for the sedan, in order to obtain a better view, it should be installed above the trunk lid, so that the inside of the car Obstacles will no longer be the influencing factor.
Of course, the advantages of smart rearview mirrors are not only geographically, but in any external environment, they provide a clear enough picture, even in the absence of external light such as rain and snow, dawn and dusk. The image transmitted to the LCD display is also anti-glare, and there is no strong reflection when the vehicle with the low beam is approaching.
For Nissan, smart rearview mirrors are not just a driver assistance system that expands the field of view. Andy Palmer, executive vice president of Nissan, introduced it: "This system shows some of our new design concepts, because smart rearview mirrors are a replacement for rear windshields. With it, for rear windshield The design, and even the shape of the rear of the car, can be more flexible and more aerodynamic, resulting in greater efficiency for the car."
This smart mirror system is really cool, but there are also some problems. Through the camera, the driver's field of view is expanded to 1-4 meters, this range will be too wide for the driver, and the vehicles in the distance will be very small. In addition, for the camera mounted on the rear windshield, if the angle of the rear windshield is too large, when the distance of the rear vehicle is too close, such as 30-60 cm, it is difficult for the driver to follow the previous experience. Accurate judgment. In this case, there may be a traffic accident that occurs because of a habitual problem and a wrong judgment.
We all know that Nissan is not the first person to eat crabs by replacing the rearview mirror with a camera, but the previous technology was used in concept cars, while Nissan's goal was mass production. Then, whether the technology can be passed is also a problem in the current vehicle safety standards. There are already suppliers such as Gentex that offer rearview mirrors with displays. However, these displays do not completely cover the rear view mirror, but only occupy a corner of the rear view mirror.
The first vehicle to have this system will be the ZEOD participating in the 24-hour Le Mans Rally. Most of the cars have no interior mirrors, only two on the left and right sides, and even with the interior mirrors, the field of view is quite limited because of the shape of the body. Therefore, this smart rearview mirror system will be a big advantage in racing. Nissan is also preparing to use the technology on small and medium-sized trucks, especially for vans, which will finally be able to see the vehicle behind it.
Nissan did not disclose which passenger cars will carry this technology. In the early days, this technology will be used as an add-on accessory for dealers, first launched in the Japanese market and expanded to the world in 2015.
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