Open AccessOptimal spectra of white LED integrated with quantum dots for mesopic vision
Author(s) -
Linlin Zan,
Der Yuh Lin,
Ping Zhong,
Guang S. He
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.007643
Subject(s) - mesopic vision , color rendering index , luminous efficacy , quantum dot , optics , color temperature , led lamp , optoelectronics , materials science , light emitting diode , physics , nanotechnology , retina , layer (electronics) , photopic vision
The spectral optimization model for limited mesopic luminous efficacy (LLE m ) of white LED integrated with quantum dots (QD-WLED) consisting of a blue chip, green, yellow and red quantum dots, including down-conversion energy loss, was developed under constraint of designated color rendering properties. The optimal spectra of QD-WLEDs with CRI ≥ 70 and CQS ≥ 60 as well as CRI ≥ 85 and CQS ≥ 85 for mesopic vision, photometric and colorimetric performances at correlated color temperature of 2700 K to 45000 K, as well as the LLE m s of optimal QD-WLEDs for four road lighting standards of the USA and the UK were presented. These results suggest that QD-WLEDs make strong candidates for replacing conventional light sources in the future as they enhance the vision quality in the road lighting in addition to energy saving.