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LED Technology


From static to animated: Addressing the evolving landscape of intelligent automotive lighting


By Michael Bender, product line manager embedded lighting at Melexis, and Andreas Laute, product manager of exterior lighting & datacom at Melexis


I


f you ask any person what the purpose of lighting is, the unanimous answer will always be to enhance visibility. The very invention of artificial lighting is in response to the absence of natural illumination. Lighting exists to make it easier and safer for us to navigate our surroundings. This holds true across countless contexts, whether it’s lighting in homes, workplaces, public spaces, or automotive lighting, where the primary concern is ensuring that drivers can see the road ahead and be seen by others to maintain safety.


In the automotive industry, the transition from incandescent bulbs to halogen lamps,


28 November 2024


followed by high-intensity discharge (HIDs) lamps, and ultimately the widespread adoption of solid-state light-emitting diodes (LEDs), is largely driven by the need for more effective and reliable lighting – helping to make our journeys safer. However, safety is not the only reason for automotive lighting. Lighting, especially LED-based solutions, can be deployed for aesthetics, providing striking visual distinctions that resonate with the end-user, and giving automotive original equipment manufacturers (OEMs) a competitive edge in an increasingly crowded marketplace.


Over the past decade, the automotive Components in Electronics


industry has consistently increased the volume and intricacy of interior and exterior automotive lighting, and this pattern is expected to persist. However, incorporating hundreds if not thousands of LEDs in a vehicle is complex, presenting several unique obstacles.


The shifting landscape of automotive lighting


The compact nature of LED lighting, combined with its relatively low production costs and energy-efficient operation, has significantly expanded and diversified lighting applications. In our homes, LED mood lighting can create an ambiance that helps us to relax and


unwind, with a simple adjustment of colour and brightness. Alternatively, in gaming, LED lights are often used to enhance our immersion, using vivid and bright colours. Historically, exterior automotive lighting consisted of lights designed to illuminate the environment, such as headlights and reversing lights, and lighting units designed to indicate a vehicle’s movement, like brake lights or turn indicators. But over time, the design of lights has progressed beyond mere safety. While daytime running lights (DRLs) are designed to increase vehicle visibility during daylight hours, in modern vehicles they are used to create a unique visual identity, with manufacturers deploying LED DRL lights


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