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Proceedings Paper

Etendue concerns for automotive headlamps using white LEDs
Author(s): Jianzhong Jiao; Ben Wang
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Paper Abstract

Based on recent development of white LEDs, it becomes feasible to design automotive headlamps using LED light sources. While these LEDs are reaching high lumen output, the uniqueness of headlamp applications has not yet been sufficiently addressed. This paper discusses the optical features of an automotive headlamp, its optical design principles, light intensity distribution and concentration requirements, and safety and customer pleasing needs. Comparing LEDs to traditional tungsten halogen bulb filament, LED light sources for headlamp applications are being analyzed. The paper identifies that etendue concerns for automotive headlamps when using white LED light sources. It provides a guideline for considerations of LED development when implementing into automotive headlamp applications.

Paper Details

Date Published: 26 January 2004
PDF: 9 pages
Proc. SPIE 5187, Third International Conference on Solid State Lighting, (26 January 2004); doi: 10.1117/12.504363
Show Author Affiliations
Jianzhong Jiao, North American Lighting, Inc. (United States)
Ben Wang, North American Lighting, Inc. (United States)


Published in SPIE Proceedings Vol. 5187:
Third International Conference on Solid State Lighting
Ian T. Ferguson; Nadarajah Narendran; Steven P. DenBaars; John C. Carrano, Editor(s)

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