Dirty LED: effect of dust, fat, fingerprints, water, oil and coal on light output

Ivan Moreno

doi:10.1117/12.843321

11 February 2010 Dirty LED: effect of dust, fat, fingerprints, water, oil and coal on light output

Ivan Moreno

Proceedings Volume 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV; 76171S (2010) https://doi.org/10.1117/12.843321
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

The output power of a light-emitting diode (LED) not only is affected by aging but also by dirt buildup. Environment and surroundings are typically characterized by the presence of substances, dust, liquids or vapors that may stick to the LED, reducing its light output. Knowing the effect of dirt on light output, manufacturers and users can efficiently design a cleaning or maintenance program. In this work, both 5-mm LEDs and high-power LEDs were subjected to output power tests for different degrees and types of dirt. In particular, I measure the light flux changes due to deposition of dust (sand), drops of water, coal dust, oil drops, fat (soldering paste), and fingerprints.

Citation Download Citation

Ivan Moreno "Dirty LED: effect of dust, fat, fingerprints, water, oil and coal on light output", Proc. SPIE 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV, 76171S (11 February 2010); https://doi.org/10.1117/12.843321

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