Pulse modulation effect of light-emitting diodes on human perception enhancement

Gu Xin; Weixi Gao; Haiping Shen; Muqing Liu

doi:10.1117/1.OE.51.7.073608

18 July 2012 Pulse modulation effect of light-emitting diodes on human perception enhancement

Gu Xin, Weixi Gao, Haiping Shen, Muqing Liu

Author Affiliations +

Optical Engineering, Vol. 51, Issue 7, 073608 (July 2012). https://doi.org/10.1117/1.OE.51.7.073608

Abstract

Pulsed operations can be used to improve the efficiency of light-emitting diodes (LEDs) on human perception. We conducted an experiment asking 46 observers to compare the brightness of a viewing area that was separated into two similar parts and illuminated by both pulse-modulated LEDs and DC-driven LEDs. Using filters, we eliminated the influence of color shift on human perception. The results show that the efficiency improves more when the duty ratio decreases. In addition, the perception enhancement has a linear relationship with duty ratios ranging between 20% and 80%. When the duty ratio is close to 100%, there is almost no effective enhancement.

Citation Download Citation

Gu Xin, Weixi Gao, Haiping Shen, and Muqing Liu "Pulse modulation effect of light-emitting diodes on human perception enhancement," Optical Engineering 51(7), 073608 (18 July 2012). https://doi.org/10.1117/1.OE.51.7.073608

Published: 18 July 2012

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