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6‐3: Correlated Color Temperature Tunable WLED for Smart Lighting
Author(s) -
Chen Haiwei,
Zhu Ruidong,
Lee YunHan,
Wu ShinTson
Publication year - 2016
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.10597
Subject(s) - color temperature , color gel , optoelectronics , materials science , high color , color filter array , structural coloration , optics , computer science , photonic crystal , nanotechnology , physics , color image , artificial intelligence , image processing , layer (electronics) , image (mathematics) , thin film transistor
We proposed a new device structure to dynamically tune the correlated color temperature (CCT) of a white light‐emittingdiode (WLED). The key component is a dynamic color filter, consisting of a liquid crystal (LC) cell sandwiched between two cholesteric LC films whose Bragg reflection band covers the blue wavelength of the WLED. Validated by experiment, our design exhibits several advantages, such as reasonably wide tuning range (6916K to 3253K), low operation voltage (~3.2 V), simple device configuration, and low cost. It is a strong contender for next generation smart lighting.