Tuning The Correlated Color Temperature Of White Light-Emitting Diodes Resembling Planckian Locus

Abstract

We report a new electrically tunable color filter to actively adjust the correlated color temperature of white light-emitting diodes. With four passive cholesteric films and an active polarization rotator, both circular polarizations of the incident light are utilized to generate complementary blue and yellow colors. The blue/yellow ratio can be tuned by the applied voltage of the polarization rotator. In experiment, the tunable color filter offers a reasonably wide tuning range (1900 K and 2400 K), which resembles the Planckian locus. This design is promising for next generation smart lighting.

Publication Date

1-22-2018

Publication Title

Optics Express

Volume

26

Issue

2

Number of Pages

A136-A143

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OE.26.00A136

Socpus ID

85040903171 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85040903171

This document is currently not available here.

Share

COinS