The paper is an overview on the state of the art in the automotive LED applications and standards. LEDs have taken over the interior applications, such as dashboard lighting and indicators. In the exterior lighting they have replaced neon and incandescent for CHMSL application. Recently the brightness of LEDs has increased to the point that rear combination lamps, tail, brake and turn functions, have become possible with LED technology. The design options are endless, because the LEDs can be placed in any thinkable pattern in a plane or 3 dimensional arrangements. The only limit is cost. A specific design of an array of LEDs is a non-standard item and since an automotive part needs to be available for 15 years, a certain inventory needs to be kept. Also over time with rapid development of LED technology the LED brightness increases fast and any changes in the LED module over the 15 years need also be considered in the part supply management. This can be avoided, if the LED system would be a standard part and the supplier would be responsible for the availability. Also the cost can be reduced due to higher volumes used across vehicle platforms. An introduced standard needs to be flexible enough to offer a variety of styling possibilities and it needs to adapt to the fast developing LED technology without changing the interface and performance specification, such as flux, power and mechanical registration. The next step in the evolution of LED standard light sources expands the styling flexibility, including reflector, projector and fiber optic systems, without giving up on a standard solution. The modular system allows a family of primary optics with different emission profiles to accommodate different applications. The mechanical and electrical interface would still be a standard module, which provides all the advantages of standardization, such as high volume production and low inventory cost due to use across vehicle platforms.
Standardized LED sources with optical concepts for signal lighting applications in automotive
Nach optischen Kriterien hergestellte standardisierte LED-Lichtquellen für den Einsatz in Fahrzeugsignalleuchten
2005
8 Seiten, 8 Bilder
Conference paper
English
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