Etendue concerns for automotive headlamps using white LEDs

Jianzhong Jiao; Ben Wang

doi:10.1117/12.504363

26 January 2004 Etendue concerns for automotive headlamps using white LEDs

Jianzhong Jiao, Ben Wang

Proceedings Volume 5187, Third International Conference on Solid State Lighting; (2004) https://doi.org/10.1117/12.504363
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

Citation Download Citation

Jianzhong Jiao and Ben Wang "Etendue concerns for automotive headlamps using white LEDs", Proc. SPIE 5187, Third International Conference on Solid State Lighting, (26 January 2004); https://doi.org/10.1117/12.504363

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