The lamp system has been recognized by car manufacturers as an important part of safety design. In response to this development, the semiconductor industry has developed a new generation of LED pixel lamps that combine high-adjustability and cost advantages with a serial-drive topology (SDT) structure to help automakers achieve adaptive lighting systems, thereby reducing night-time driving. Risk of accidents.
According to a study conducted by the European Union, more than 60% of serious traffic accidents occur during non-daytime hours. To alleviate this amazing number, automakers are now exploring the use of more sophisticated lighting hardware. This article will detail the emerging PixelLight technology, examine the different control methods on the market that match this technology, and confirm before application that which of these control technology choices is most likely to be applied to the next generation of cars. in.
In the past decade, incandescent lamps have gradually been replaced by solid-state lighting sources in automotive lighting. Initial solid-state lighting applications were limited to relatively non-emergency lighting tasks such as cockpit lighting, parking lights, and dashboard backlighting. In recent years, however, LEDs have been earmarked for mid-range and luxury car headlight systems; even in entry-level models, LED-based headlamp systems are optional additional accessories. One of the key factors in the continued evolution of this development is that LED components provide higher reliability and lower energy consumption, while the flexibility of solid-state lighting and the potential adjustability of the output power of each illuminator are more important for automotive safety. Influence.
Replacing the traditional lighting method, the adjustable light of the pixel lamp is greatly increased.
The emergence of innovative, highly accommodating optoelectronic technology has led to a revolution in the application of adaptive headlamp system (AFS) solutions in automobiles, resulting in a significant increase in driving safety. By using a pixel light (Figure 1), any special illumination beam shape can now be generated to meet the driver's need to improve the driver's field of view, including enabling, turning off or dimming discrete LED illuminators to accurately match each point requirement. AFS glow shape.
Figure 1 Example of a pixel lamp system
The use of multiple LED illuminant controls using pixel lamps provides a more efficient strategy than AFS applications that use traditional incandescent bulbs (which rely on motor control beam conditioning). By accessing the vehicle's satellite navigation system (GPS), the light output of the illuminator can be controlled to create a better speed of light to illuminate the forward bend, such as raising and lowering the beam during a mountain pass (Figure 2).
Figure 2 The pixel lamp can adjust the illumination beam
In addition, by combining this technology with the imaging system, it can also greatly improve the lighting effects on road signs, pedestrians and other objects in the driver's line of sight, while also significantly reducing the glare problems that oncoming vehicles may encounter. Figure 3 shows how the area of ​​the car approaching from the opposite direction can be excluded from the range of the high beam illumination, thus eliminating the glare effect.
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